1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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"
58 static tree
grokparms (tree parmlist
, tree
*);
59 static const char *redeclaration_error_message (tree
, tree
);
61 static int decl_jump_unsafe (tree
);
62 static void require_complete_types_for_parms (tree
);
63 static int ambi_op_p (enum tree_code
);
64 static int unary_op_p (enum tree_code
);
65 static void push_local_name (tree
);
66 static tree
grok_reference_init (tree
, tree
, tree
, tree
*);
67 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
69 static void record_unknown_type (tree
, const char *);
70 static tree
builtin_function_1 (tree
, tree
, bool);
71 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
72 static int member_function_or_else (tree
, tree
, enum overload_flags
);
73 static void bad_specifiers (tree
, const char *, int, int, int, int,
75 static void check_for_uninitialized_const_var (tree
);
76 static hashval_t
typename_hash (const void *);
77 static int typename_compare (const void *, const void *);
78 static tree
local_variable_p_walkfn (tree
*, int *, void *);
79 static tree
record_builtin_java_type (const char *, int);
80 static const char *tag_name (enum tag_types
);
81 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
82 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
83 static void maybe_deduce_size_from_array_init (tree
, tree
);
84 static void layout_var_decl (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 (location_t
, 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 GTY(()) named_label_use_entry
{
173 struct named_label_use_entry
*next
;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level
*binding_level
;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus
;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct GTY(()) named_label_entry
{
195 /* The decl itself. */
198 /* The binding level to which the label is *currently* attached.
199 This is initially set to the binding level in which the label
200 is defined, but is modified as scopes are closed. */
201 struct cp_binding_level
*binding_level
;
202 /* The head of the names list that was current when the label was
203 defined, or the inner scope popped. These are the decls that will
204 be skipped when jumping to the label. */
206 /* A tree list of all decls from all binding levels that would be
207 crossed by a backward branch to the label. */
210 /* A list of uses of the label, before the label is defined. */
211 struct named_label_use_entry
*uses
;
213 /* The following bits are set after the label is defined, and are
214 updated as scopes are popped. They indicate that a backward jump
215 to the label will illegally enter a scope of the given flavor. */
221 #define named_labels cp_function_chain->x_named_labels
223 /* The number of function bodies which we are currently processing.
224 (Zero if we are at namespace scope, one inside the body of a
225 function, two inside the body of a function in a local class, etc.) */
228 /* To avoid unwanted recursion, finish_function defers all mark_used calls
229 encountered during its execution until it finishes. */
230 bool defer_mark_used_calls
;
231 VEC(tree
, gc
) *deferred_mark_used_calls
;
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
237 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
240 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
241 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
242 time the VAR_DECL was declared, the type was incomplete. */
244 static GTY(()) tree incomplete_vars
;
246 /* Returns the kind of template specialization we are currently
247 processing, given that it's declaration contained N_CLASS_SCOPES
248 explicit scope qualifications. */
251 current_tmpl_spec_kind (int n_class_scopes
)
253 int n_template_parm_scopes
= 0;
254 int seen_specialization_p
= 0;
255 int innermost_specialization_p
= 0;
256 struct cp_binding_level
*b
;
258 /* Scan through the template parameter scopes. */
259 for (b
= current_binding_level
;
260 b
->kind
== sk_template_parms
;
263 /* If we see a specialization scope inside a parameter scope,
264 then something is wrong. That corresponds to a declaration
267 template <class T> template <> ...
269 which is always invalid since [temp.expl.spec] forbids the
270 specialization of a class member template if the enclosing
271 class templates are not explicitly specialized as well. */
272 if (b
->explicit_spec_p
)
274 if (n_template_parm_scopes
== 0)
275 innermost_specialization_p
= 1;
277 seen_specialization_p
= 1;
279 else if (seen_specialization_p
== 1)
280 return tsk_invalid_member_spec
;
282 ++n_template_parm_scopes
;
285 /* Handle explicit instantiations. */
286 if (processing_explicit_instantiation
)
288 if (n_template_parm_scopes
!= 0)
289 /* We've seen a template parameter list during an explicit
290 instantiation. For example:
292 template <class T> template void f(int);
294 This is erroneous. */
295 return tsk_invalid_expl_inst
;
297 return tsk_expl_inst
;
300 if (n_template_parm_scopes
< n_class_scopes
)
301 /* We've not seen enough template headers to match all the
302 specialized classes present. For example:
304 template <class T> void R<T>::S<T>::f(int);
306 This is invalid; there needs to be one set of template
307 parameters for each class. */
308 return tsk_insufficient_parms
;
309 else if (n_template_parm_scopes
== n_class_scopes
)
310 /* We're processing a non-template declaration (even though it may
311 be a member of a template class.) For example:
313 template <class T> void S<T>::f(int);
315 The `class T' matches the `S<T>', leaving no template headers
316 corresponding to the `f'. */
318 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
319 /* We've got too many template headers. For example:
321 template <> template <class T> void f (T);
323 There need to be more enclosing classes. */
324 return tsk_excessive_parms
;
326 /* This must be a template. It's of the form:
328 template <class T> template <class U> void S<T>::f(U);
330 This is a specialization if the innermost level was a
331 specialization; otherwise it's just a definition of the
333 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
336 /* Exit the current scope. */
344 /* When a label goes out of scope, check to see if that label was used
345 in a valid manner, and issue any appropriate warnings or errors. */
348 pop_label (tree label
, tree old_value
)
350 if (!processing_template_decl
)
352 if (DECL_INITIAL (label
) == NULL_TREE
)
356 error ("label %q+D used but not defined", label
);
357 location
= input_location
; /* FIXME want (input_filename, (line)0) */
358 /* Avoid crashing later. */
359 define_label (location
, DECL_NAME (label
));
362 warn_for_unused_label (label
);
365 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
368 /* At the end of a function, all labels declared within the function
369 go out of scope. BLOCK is the top-level block for the
373 pop_labels_1 (void **slot
, void *data
)
375 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
376 tree block
= (tree
) data
;
378 pop_label (ent
->label_decl
, NULL_TREE
);
380 /* Put the labels into the "variables" of the top-level block,
381 so debugger can see them. */
382 TREE_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
383 BLOCK_VARS (block
) = ent
->label_decl
;
385 htab_clear_slot (named_labels
, slot
);
391 pop_labels (tree block
)
395 htab_traverse (named_labels
, pop_labels_1
, block
);
400 /* At the end of a block with local labels, restore the outer definition. */
403 pop_local_label (tree label
, tree old_value
)
405 struct named_label_entry dummy
;
408 pop_label (label
, old_value
);
410 dummy
.label_decl
= label
;
411 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
412 htab_clear_slot (named_labels
, slot
);
415 /* The following two routines are used to interface to Objective-C++.
416 The binding level is purposely treated as an opaque type. */
419 objc_get_current_scope (void)
421 return current_binding_level
;
424 /* The following routine is used by the NeXT-style SJLJ exceptions;
425 variables get marked 'volatile' so as to not be clobbered by
426 _setjmp()/_longjmp() calls. All variables in the current scope,
427 as well as parent scopes up to (but not including) ENCLOSING_BLK
428 shall be thusly marked. */
431 objc_mark_locals_volatile (void *enclosing_blk
)
433 struct cp_binding_level
*scope
;
435 for (scope
= current_binding_level
;
436 scope
&& scope
!= enclosing_blk
;
437 scope
= scope
->level_chain
)
441 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
442 objc_volatilize_decl (decl
);
444 /* Do not climb up past the current function. */
445 if (scope
->kind
== sk_function_parms
)
450 /* Update data for defined and undefined labels when leaving a scope. */
453 poplevel_named_label_1 (void **slot
, void *data
)
455 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
456 struct cp_binding_level
*bl
= (struct cp_binding_level
*) data
;
457 struct cp_binding_level
*obl
= bl
->level_chain
;
459 if (ent
->binding_level
== bl
)
463 for (decl
= ent
->names_in_scope
; decl
; decl
= TREE_CHAIN (decl
))
464 if (decl_jump_unsafe (decl
))
465 ent
->bad_decls
= tree_cons (NULL
, decl
, ent
->bad_decls
);
467 ent
->binding_level
= obl
;
468 ent
->names_in_scope
= obl
->names
;
472 ent
->in_try_scope
= true;
475 ent
->in_catch_scope
= true;
478 ent
->in_omp_scope
= true;
486 struct named_label_use_entry
*use
;
488 for (use
= ent
->uses
; use
; use
= use
->next
)
489 if (use
->binding_level
== bl
)
491 use
->binding_level
= obl
;
492 use
->names_in_scope
= obl
->names
;
493 if (bl
->kind
== sk_omp
)
494 use
->in_omp_scope
= true;
501 /* Exit a binding level.
502 Pop the level off, and restore the state of the identifier-decl mappings
503 that were in effect when this level was entered.
505 If KEEP == 1, this level had explicit declarations, so
506 and create a "block" (a BLOCK node) for the level
507 to record its declarations and subblocks for symbol table output.
509 If FUNCTIONBODY is nonzero, this level is the body of a function,
510 so create a block as if KEEP were set and also clear out all
513 If REVERSE is nonzero, reverse the order of decls before putting
514 them into the BLOCK. */
517 poplevel (int keep
, int reverse
, int functionbody
)
520 /* The chain of decls was accumulated in reverse order.
521 Put it into forward order, just for cleanliness. */
523 int tmp
= functionbody
;
524 int real_functionbody
;
528 int leaving_for_scope
;
531 timevar_push (TV_NAME_LOOKUP
);
536 gcc_assert (current_binding_level
->kind
!= sk_class
);
538 real_functionbody
= (current_binding_level
->kind
== sk_cleanup
539 ? ((functionbody
= 0), tmp
) : functionbody
);
540 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
542 gcc_assert (!VEC_length(cp_class_binding
,
543 current_binding_level
->class_shadowed
));
545 /* We used to use KEEP == 2 to indicate that the new block should go
546 at the beginning of the list of blocks at this binding level,
547 rather than the end. This hack is no longer used. */
548 gcc_assert (keep
== 0 || keep
== 1);
550 if (current_binding_level
->keep
)
553 /* Any uses of undefined labels, and any defined labels, now operate
554 under constraints of next binding contour. */
555 if (cfun
&& !functionbody
&& named_labels
)
556 htab_traverse (named_labels
, poplevel_named_label_1
,
557 current_binding_level
);
559 /* Get the decls in the order they were written.
560 Usually current_binding_level->names is in reverse order.
561 But parameter decls were previously put in forward order. */
564 current_binding_level
->names
565 = decls
= nreverse (current_binding_level
->names
);
567 decls
= current_binding_level
->names
;
569 /* If there were any declarations or structure tags in that level,
570 or if this level is a function body,
571 create a BLOCK to record them for the life of this function. */
573 if (keep
== 1 || functionbody
)
574 block
= make_node (BLOCK
);
575 if (block
!= NULL_TREE
)
577 BLOCK_VARS (block
) = decls
;
578 BLOCK_SUBBLOCKS (block
) = subblocks
;
581 /* In each subblock, record that this is its superior. */
583 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
584 BLOCK_SUPERCONTEXT (link
) = block
;
586 /* We still support the old for-scope rules, whereby the variables
587 in a for-init statement were in scope after the for-statement
588 ended. We only use the new rules if flag_new_for_scope is
591 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
593 /* Before we remove the declarations first check for unused variables. */
594 if (warn_unused_variable
595 && !processing_template_decl
)
596 for (decl
= getdecls (); decl
; decl
= TREE_CHAIN (decl
))
597 if (TREE_CODE (decl
) == VAR_DECL
598 && ! TREE_USED (decl
)
599 && ! DECL_IN_SYSTEM_HEADER (decl
)
600 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
))
601 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
603 /* Remove declarations for all the DECLs in this level. */
604 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
606 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
609 tree name
= DECL_NAME (link
);
613 ob
= outer_binding (name
,
614 IDENTIFIER_BINDING (name
),
617 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
619 ns_binding
= NULL_TREE
;
621 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
622 /* We have something like:
627 and we are leaving the `for' scope. There's no reason to
628 keep the binding of the inner `i' in this case. */
629 pop_binding (name
, link
);
630 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
631 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
632 /* Here, we have something like:
640 We must pop the for-scope binding so we know what's a
641 type and what isn't. */
642 pop_binding (name
, link
);
645 /* Mark this VAR_DECL as dead so that we can tell we left it
646 there only for backward compatibility. */
647 DECL_DEAD_FOR_LOCAL (link
) = 1;
649 /* Keep track of what should have happened when we
650 popped the binding. */
653 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
654 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
657 /* Add it to the list of dead variables in the next
658 outermost binding to that we can remove these when we
659 leave that binding. */
660 current_binding_level
->level_chain
->dead_vars_from_for
661 = tree_cons (NULL_TREE
, link
,
662 current_binding_level
->level_chain
->
665 /* Although we don't pop the cxx_binding, we do clear
666 its SCOPE since the scope is going away now. */
667 IDENTIFIER_BINDING (name
)->scope
668 = current_binding_level
->level_chain
;
675 /* Remove the binding. */
678 if (TREE_CODE (decl
) == TREE_LIST
)
679 decl
= TREE_VALUE (decl
);
682 if (TREE_CODE (name
) == OVERLOAD
)
683 name
= OVL_FUNCTION (name
);
685 gcc_assert (DECL_P (name
));
686 pop_binding (DECL_NAME (name
), decl
);
690 /* Remove declarations for any `for' variables from inner scopes
691 that we kept around. */
692 for (link
= current_binding_level
->dead_vars_from_for
;
693 link
; link
= TREE_CHAIN (link
))
694 pop_binding (DECL_NAME (TREE_VALUE (link
)), TREE_VALUE (link
));
696 /* Restore the IDENTIFIER_TYPE_VALUEs. */
697 for (link
= current_binding_level
->type_shadowed
;
698 link
; link
= TREE_CHAIN (link
))
699 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
701 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
702 for (link
= current_binding_level
->shadowed_labels
;
704 link
= TREE_CHAIN (link
))
705 pop_local_label (TREE_VALUE (link
), TREE_PURPOSE (link
));
707 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
708 list if a `using' declaration put them there. The debugging
709 back ends won't understand OVERLOAD, so we remove them here.
710 Because the BLOCK_VARS are (temporarily) shared with
711 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
712 popped all the bindings. */
717 for (d
= &BLOCK_VARS (block
); *d
; )
719 if (TREE_CODE (*d
) == TREE_LIST
)
720 *d
= TREE_CHAIN (*d
);
722 d
= &TREE_CHAIN (*d
);
726 /* If the level being exited is the top level of a function,
727 check over all the labels. */
730 /* Since this is the top level block of a function, the vars are
731 the function's parameters. Don't leave them in the BLOCK
732 because they are found in the FUNCTION_DECL instead. */
733 BLOCK_VARS (block
) = 0;
737 kind
= current_binding_level
->kind
;
738 if (kind
== sk_cleanup
)
742 /* If this is a temporary binding created for a cleanup, then we'll
743 have pushed a statement list level. Pop that, create a new
744 BIND_EXPR for the block, and insert it into the stream. */
745 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
746 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
753 /* The current function is being defined, so its DECL_INITIAL
754 should be error_mark_node. */
755 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
756 DECL_INITIAL (current_function_decl
) = block
;
759 current_binding_level
->blocks
760 = chainon (current_binding_level
->blocks
, block
);
762 /* If we did not make a block for the level just exited,
763 any blocks made for inner levels
764 (since they cannot be recorded as subblocks in that level)
765 must be carried forward so they will later become subblocks
766 of something else. */
768 current_binding_level
->blocks
769 = chainon (current_binding_level
->blocks
, subblocks
);
771 /* Each and every BLOCK node created here in `poplevel' is important
772 (e.g. for proper debugging information) so if we created one
773 earlier, mark it as "used". */
775 TREE_USED (block
) = 1;
777 /* All temporary bindings created for cleanups are popped silently. */
778 if (kind
== sk_cleanup
)
781 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, block
);
784 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
785 itself, calling F for each. The DATA is passed to F as well. */
788 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
791 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
793 result
|= (*f
) (name_space
, data
);
795 for (; current
; current
= TREE_CHAIN (current
))
796 result
|= walk_namespaces_r (current
, f
, data
);
801 /* Walk all the namespaces, calling F for each. The DATA is passed to
805 walk_namespaces (walk_namespaces_fn f
, void* data
)
807 return walk_namespaces_r (global_namespace
, f
, data
);
810 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
811 DATA is non-NULL, this is the last time we will call
812 wrapup_global_declarations for this NAMESPACE. */
815 wrapup_globals_for_namespace (tree name_space
, void* data
)
817 struct cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
818 VEC(tree
,gc
) *statics
= level
->static_decls
;
819 tree
*vec
= VEC_address (tree
, statics
);
820 int len
= VEC_length (tree
, statics
);
821 int last_time
= (data
!= 0);
825 check_global_declarations (vec
, len
);
826 emit_debug_global_declarations (vec
, len
);
830 /* Write out any globals that need to be output. */
831 return wrapup_global_declarations (vec
, len
);
835 /* In C++, you don't have to write `struct S' to refer to `S'; you
836 can just use `S'. We accomplish this by creating a TYPE_DECL as
837 if the user had written `typedef struct S S'. Create and return
838 the TYPE_DECL for TYPE. */
841 create_implicit_typedef (tree name
, tree type
)
845 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
846 DECL_ARTIFICIAL (decl
) = 1;
847 /* There are other implicit type declarations, like the one *within*
848 a class that allows you to write `S::S'. We must distinguish
850 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
851 TYPE_NAME (type
) = decl
;
852 TYPE_STUB_DECL (type
) = decl
;
857 /* Remember a local name for name-mangling purposes. */
860 push_local_name (tree decl
)
865 timevar_push (TV_NAME_LOOKUP
);
867 name
= DECL_NAME (decl
);
869 nelts
= VEC_length (tree
, local_names
);
870 for (i
= 0; i
< nelts
; i
++)
872 t
= VEC_index (tree
, local_names
, i
);
873 if (DECL_NAME (t
) == name
)
875 if (!DECL_LANG_SPECIFIC (decl
))
876 retrofit_lang_decl (decl
);
877 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
878 if (DECL_LANG_SPECIFIC (t
))
879 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
881 DECL_DISCRIMINATOR (decl
) = 1;
883 VEC_replace (tree
, local_names
, i
, decl
);
884 timevar_pop (TV_NAME_LOOKUP
);
889 VEC_safe_push (tree
, gc
, local_names
, decl
);
890 timevar_pop (TV_NAME_LOOKUP
);
893 /* Subroutine of duplicate_decls: return truthvalue of whether
894 or not types of these decls match.
896 For C++, we must compare the parameter list so that `int' can match
897 `int&' in a parameter position, but `int&' is not confused with
901 decls_match (tree newdecl
, tree olddecl
)
905 if (newdecl
== olddecl
)
908 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
909 /* If the two DECLs are not even the same kind of thing, we're not
910 interested in their types. */
913 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
915 tree f1
= TREE_TYPE (newdecl
);
916 tree f2
= TREE_TYPE (olddecl
);
917 tree p1
= TYPE_ARG_TYPES (f1
);
918 tree p2
= TYPE_ARG_TYPES (f2
);
920 /* Specializations of different templates are different functions
921 even if they have the same type. */
922 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
923 ? DECL_TI_TEMPLATE (newdecl
)
925 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
926 ? DECL_TI_TEMPLATE (olddecl
)
931 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
932 && ! (DECL_EXTERN_C_P (newdecl
)
933 && DECL_EXTERN_C_P (olddecl
)))
936 #ifdef NO_IMPLICIT_EXTERN_C
937 /* A new declaration doesn't match a built-in one unless it
938 is also extern "C". */
939 if (DECL_IS_BUILTIN (olddecl
)
940 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
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 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1064 permerror (input_location
, "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;
1121 tree new_template_info
;
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_at (DECL_SOURCE_LOCATION (newdecl
), 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_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1482 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1483 "follows non-prototype definition here");
1485 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1486 || TREE_CODE (olddecl
) == VAR_DECL
)
1487 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1490 If two declarations of the same function or object
1491 specify different linkage-specifications ..., the program
1492 is ill-formed.... Except for functions with C++ linkage,
1493 a function declaration without a linkage specification
1494 shall not precede the first linkage specification for
1495 that function. A function can be declared without a
1496 linkage specification after an explicit linkage
1497 specification has been seen; the linkage explicitly
1498 specified in the earlier declaration is not affected by
1499 such a function declaration.
1501 DR 563 raises the question why the restrictions on
1502 functions should not also apply to objects. Older
1503 versions of G++ silently ignore the linkage-specification
1511 which is clearly wrong. Therefore, we now treat objects
1513 if (current_lang_depth () == 0)
1515 /* There is no explicit linkage-specification, so we use
1516 the linkage from the previous declaration. */
1517 if (!DECL_LANG_SPECIFIC (newdecl
))
1518 retrofit_lang_decl (newdecl
);
1519 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1523 error ("previous declaration of %q+#D with %qL linkage",
1524 olddecl
, DECL_LANGUAGE (olddecl
));
1525 error ("conflicts with new declaration with %qL linkage",
1526 DECL_LANGUAGE (newdecl
));
1530 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1532 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1534 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1535 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1538 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1539 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1541 for (; t1
&& t1
!= void_list_node
;
1542 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1543 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1545 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1548 permerror (input_location
, "default argument given for parameter %d of %q#D",
1550 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1554 error ("default argument given for parameter %d of %q#D",
1556 error ("after previous specification in %q+#D",
1563 /* Do not merge an implicit typedef with an explicit one. In:
1567 typedef class A A __attribute__ ((foo));
1569 the attribute should apply only to the typedef. */
1570 if (TREE_CODE (olddecl
) == TYPE_DECL
1571 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1572 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1575 /* If new decl is `static' and an `extern' was seen previously,
1577 warn_extern_redeclared_static (newdecl
, olddecl
);
1579 /* We have committed to returning 1 at this point. */
1580 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1582 /* Now that functions must hold information normally held
1583 by field decls, there is extra work to do so that
1584 declaration information does not get destroyed during
1586 if (DECL_VINDEX (olddecl
))
1587 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1588 if (DECL_CONTEXT (olddecl
))
1589 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1590 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1591 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1592 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1593 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1594 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1595 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1596 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1597 SET_OVERLOADED_OPERATOR_CODE
1598 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1599 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1601 /* Optionally warn about more than one declaration for the same
1602 name, but don't warn about a function declaration followed by a
1604 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1605 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1606 /* Don't warn about extern decl followed by definition. */
1607 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1608 /* Don't warn about friends, let add_friend take care of it. */
1609 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
)))
1611 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1612 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1615 if (DECL_DELETED_FN (newdecl
))
1617 error ("deleted definition of %qD", newdecl
);
1618 error ("after previous declaration %q+D", olddecl
);
1622 /* Deal with C++: must preserve virtual function table size. */
1623 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1625 tree newtype
= TREE_TYPE (newdecl
);
1626 tree oldtype
= TREE_TYPE (olddecl
);
1628 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1629 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1630 CLASSTYPE_FRIEND_CLASSES (newtype
)
1631 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1633 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1636 /* Copy all the DECL_... slots specified in the new decl
1637 except for any that we copy here from the old type. */
1638 DECL_ATTRIBUTES (newdecl
)
1639 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1641 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1645 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1646 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1647 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1648 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1649 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1650 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1652 DECL_ATTRIBUTES (old_result
)
1653 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1655 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1657 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1658 && DECL_INITIAL (new_result
))
1660 if (DECL_INITIAL (old_result
))
1661 DECL_UNINLINABLE (old_result
) = 1;
1663 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1664 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1665 DECL_NOT_REALLY_EXTERN (old_result
)
1666 = DECL_NOT_REALLY_EXTERN (new_result
);
1667 DECL_INTERFACE_KNOWN (old_result
)
1668 = DECL_INTERFACE_KNOWN (new_result
);
1669 DECL_DECLARED_INLINE_P (old_result
)
1670 = DECL_DECLARED_INLINE_P (new_result
);
1671 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1672 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1677 DECL_DECLARED_INLINE_P (old_result
)
1678 |= DECL_DECLARED_INLINE_P (new_result
);
1679 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1680 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1681 check_redeclaration_exception_specification (newdecl
, olddecl
);
1685 /* If the new declaration is a definition, update the file and
1686 line information on the declaration, and also make
1687 the old declaration the same definition. */
1688 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1690 DECL_SOURCE_LOCATION (olddecl
)
1691 = DECL_SOURCE_LOCATION (old_result
)
1692 = DECL_SOURCE_LOCATION (newdecl
);
1693 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1694 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1697 DECL_ARGUMENTS (old_result
)
1698 = DECL_ARGUMENTS (new_result
);
1699 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1700 parm
= TREE_CHAIN (parm
))
1701 DECL_CONTEXT (parm
) = old_result
;
1710 /* Automatically handles default parameters. */
1711 tree oldtype
= TREE_TYPE (olddecl
);
1714 /* Merge the data types specified in the two decls. */
1715 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1717 /* If merge_types produces a non-typedef type, just use the old type. */
1718 if (TREE_CODE (newdecl
) == TYPE_DECL
1719 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1722 if (TREE_CODE (newdecl
) == VAR_DECL
)
1724 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1725 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1726 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1727 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1728 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1729 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1731 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1732 if (DECL_LANG_SPECIFIC (olddecl
)
1733 && CP_DECL_THREADPRIVATE_P (olddecl
))
1735 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1736 if (!DECL_LANG_SPECIFIC (newdecl
))
1737 retrofit_lang_decl (newdecl
);
1739 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1740 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1744 /* Do this after calling `merge_types' so that default
1745 parameters don't confuse us. */
1746 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1747 check_redeclaration_exception_specification (newdecl
, olddecl
);
1748 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1750 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1751 check_default_args (newdecl
);
1753 /* Lay the type out, unless already done. */
1754 if (! same_type_p (newtype
, oldtype
)
1755 && TREE_TYPE (newdecl
) != error_mark_node
1756 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1757 layout_type (TREE_TYPE (newdecl
));
1759 if ((TREE_CODE (newdecl
) == VAR_DECL
1760 || TREE_CODE (newdecl
) == PARM_DECL
1761 || TREE_CODE (newdecl
) == RESULT_DECL
1762 || TREE_CODE (newdecl
) == FIELD_DECL
1763 || TREE_CODE (newdecl
) == TYPE_DECL
)
1764 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1765 layout_decl (newdecl
, 0);
1767 /* Merge the type qualifiers. */
1768 if (TREE_READONLY (newdecl
))
1769 TREE_READONLY (olddecl
) = 1;
1770 if (TREE_THIS_VOLATILE (newdecl
))
1771 TREE_THIS_VOLATILE (olddecl
) = 1;
1772 if (TREE_NOTHROW (newdecl
))
1773 TREE_NOTHROW (olddecl
) = 1;
1775 /* Merge deprecatedness. */
1776 if (TREE_DEPRECATED (newdecl
))
1777 TREE_DEPRECATED (olddecl
) = 1;
1779 /* Preserve function specific target and optimization options */
1780 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1782 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1783 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1784 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1785 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1787 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1788 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1789 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1790 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1793 /* Merge the initialization information. */
1794 if (DECL_INITIAL (newdecl
) == NULL_TREE
1795 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1797 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1798 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1799 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1801 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1802 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1806 /* Merge the section attribute.
1807 We want to issue an error if the sections conflict but that must be
1808 done later in decl_attributes since we are called before attributes
1810 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1811 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1813 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1815 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1816 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1817 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1818 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1819 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1820 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1821 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1822 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1823 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1824 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1825 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1826 /* Keep the old RTL. */
1827 COPY_DECL_RTL (olddecl
, newdecl
);
1829 else if (TREE_CODE (newdecl
) == VAR_DECL
1830 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1832 /* Keep the old RTL. We cannot keep the old RTL if the old
1833 declaration was for an incomplete object and the new
1834 declaration is not since many attributes of the RTL will
1836 COPY_DECL_RTL (olddecl
, newdecl
);
1839 /* If cannot merge, then use the new type and qualifiers,
1840 and don't preserve the old rtl. */
1843 /* Clean out any memory we had of the old declaration. */
1844 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1846 TREE_VALUE (oldstatic
) = error_mark_node
;
1848 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1849 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1850 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1851 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1854 /* Merge the storage class information. */
1855 merge_weak (newdecl
, olddecl
);
1857 if (DECL_ONE_ONLY (olddecl
))
1858 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
1860 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1861 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1862 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1863 if (! DECL_EXTERNAL (olddecl
))
1864 DECL_EXTERNAL (newdecl
) = 0;
1866 new_template_info
= NULL_TREE
;
1867 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1869 bool new_redefines_gnu_inline
= false;
1871 if (new_defines_function
1872 && ((DECL_INTERFACE_KNOWN (olddecl
)
1873 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
1874 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
1875 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1876 == FUNCTION_DECL
))))
1880 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
1881 fn
= DECL_TEMPLATE_RESULT (olddecl
);
1883 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
1886 if (!new_redefines_gnu_inline
)
1888 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1889 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1890 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1892 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1893 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1894 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
1896 /* If the OLDDECL is an instantiation and/or specialization,
1897 then the NEWDECL must be too. But, it may not yet be marked
1898 as such if the caller has created NEWDECL, but has not yet
1899 figured out that it is a redeclaration. */
1900 if (!DECL_USE_TEMPLATE (newdecl
))
1901 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
1903 /* Don't really know how much of the language-specific
1904 values we should copy from old to new. */
1905 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
1906 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
1907 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
1908 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
1910 if (LANG_DECL_HAS_MIN (newdecl
))
1912 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
1913 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
1914 if (DECL_TEMPLATE_INFO (newdecl
))
1915 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
1916 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
1918 /* Only functions have these fields. */
1919 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1920 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
1922 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
1923 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1924 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1925 && DECL_HIDDEN_FRIEND_P (olddecl
)
1926 && newdecl_is_friend
);
1927 DECL_BEFRIENDING_CLASSES (newdecl
)
1928 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
1929 DECL_BEFRIENDING_CLASSES (olddecl
));
1930 /* DECL_THUNKS is only valid for virtual functions,
1931 otherwise it is a DECL_FRIEND_CONTEXT. */
1932 if (DECL_VIRTUAL_P (newdecl
))
1933 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
1937 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1941 /* Merge parameter attributes. */
1942 tree oldarg
, newarg
;
1943 for (oldarg
= DECL_ARGUMENTS(olddecl
),
1944 newarg
= DECL_ARGUMENTS(newdecl
);
1946 oldarg
= TREE_CHAIN(oldarg
), newarg
= TREE_CHAIN(newarg
)) {
1947 DECL_ATTRIBUTES (newarg
)
1948 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
1949 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
1952 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
1953 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
1955 /* If newdecl is not a specialization, then it is not a
1956 template-related function at all. And that means that we
1957 should have exited above, returning 0. */
1958 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
1960 if (DECL_ODR_USED (olddecl
))
1961 /* From [temp.expl.spec]:
1963 If a template, a member template or the member of a class
1964 template is explicitly specialized then that
1965 specialization shall be declared before the first use of
1966 that specialization that would cause an implicit
1967 instantiation to take place, in every translation unit in
1968 which such a use occurs. */
1969 error ("explicit specialization of %qD after first use",
1972 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
1974 /* Don't propagate visibility from the template to the
1975 specialization here. We'll do that in determine_visibility if
1977 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
1979 /* [temp.expl.spec/14] We don't inline explicit specialization
1980 just because the primary template says so. */
1982 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
1984 /* Never inline re-defined extern inline functions.
1985 FIXME: this could be better handled by keeping both
1986 function as separate declarations. */
1987 DECL_UNINLINABLE (newdecl
) = 1;
1991 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
1992 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
1994 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
1996 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
1997 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
1999 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2000 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2001 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2002 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2005 /* Preserve abstractness on cloned [cd]tors. */
2006 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2008 /* Update newdecl's parms to point at olddecl. */
2009 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2010 parm
= TREE_CHAIN (parm
))
2011 DECL_CONTEXT (parm
) = olddecl
;
2015 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2016 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2017 COPY_DECL_RTL (newdecl
, olddecl
);
2019 if (! types_match
|| new_defines_function
)
2021 /* These need to be copied so that the names are available.
2022 Note that if the types do match, we'll preserve inline
2023 info and other bits, but if not, we won't. */
2024 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2025 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2027 if (new_defines_function
)
2028 /* If defining a function declared with other language
2029 linkage, use the previously declared language linkage. */
2030 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2031 else if (types_match
)
2033 /* If redeclaring a builtin function, and not a definition,
2034 it stays built in. */
2035 if (DECL_BUILT_IN (olddecl
))
2037 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2038 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2039 /* If we're keeping the built-in definition, keep the rtl,
2040 regardless of declaration matches. */
2041 COPY_DECL_RTL (olddecl
, newdecl
);
2044 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2045 /* Don't clear out the arguments if we're just redeclaring a
2047 if (DECL_ARGUMENTS (olddecl
))
2048 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2051 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2052 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2054 /* Now preserve various other info from the definition. */
2055 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2056 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2057 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2058 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2060 /* Warn about conflicting visibility specifications. */
2061 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2062 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2063 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2065 warning_at (input_location
, OPT_Wattributes
,
2066 "%q+D: visibility attribute ignored because it", newdecl
);
2067 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2068 "conflicts with previous declaration here");
2070 /* Choose the declaration which specified visibility. */
2071 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2073 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2074 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2076 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2077 so keep this behavior. */
2078 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
2080 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2081 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2084 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2085 with that from NEWDECL below. */
2086 if (DECL_LANG_SPECIFIC (olddecl
))
2088 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2089 != DECL_LANG_SPECIFIC (newdecl
));
2090 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2093 /* Merge the USED information. */
2094 if (TREE_USED (olddecl
))
2095 TREE_USED (newdecl
) = 1;
2096 else if (TREE_USED (newdecl
))
2097 TREE_USED (olddecl
) = 1;
2099 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2103 function_size
= sizeof (struct tree_decl_common
);
2105 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2106 (char *) newdecl
+ sizeof (struct tree_common
),
2107 function_size
- sizeof (struct tree_common
));
2109 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2110 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2111 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2112 if (new_template_info
)
2113 /* If newdecl is a template instantiation, it is possible that
2114 the following sequence of events has occurred:
2116 o A friend function was declared in a class template. The
2117 class template was instantiated.
2119 o The instantiation of the friend declaration was
2120 recorded on the instantiation list, and is newdecl.
2122 o Later, however, instantiate_class_template called pushdecl
2123 on the newdecl to perform name injection. But, pushdecl in
2124 turn called duplicate_decls when it discovered that another
2125 declaration of a global function with the same name already
2128 o Here, in duplicate_decls, we decided to clobber newdecl.
2130 If we're going to do that, we'd better make sure that
2131 olddecl, and not newdecl, is on the list of
2132 instantiations so that if we try to do the instantiation
2133 again we won't get the clobbered declaration. */
2134 reregister_specialization (newdecl
,
2140 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2141 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2142 (char *) newdecl
+ sizeof (struct tree_common
),
2143 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2144 switch (TREE_CODE (olddecl
))
2154 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2155 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2156 size
- sizeof (struct tree_decl_common
)
2157 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2161 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2162 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2163 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2164 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2168 DECL_UID (olddecl
) = olddecl_uid
;
2170 DECL_FRIEND_P (olddecl
) = 1;
2173 DECL_ANTICIPATED (olddecl
) = 1;
2174 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2177 /* NEWDECL contains the merged attribute lists.
2178 Update OLDDECL to be the same. */
2179 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2181 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2182 so that encode_section_info has a chance to look at the new decl
2183 flags and attributes. */
2184 if (DECL_RTL_SET_P (olddecl
)
2185 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2186 || (TREE_CODE (olddecl
) == VAR_DECL
2187 && TREE_STATIC (olddecl
))))
2188 make_decl_rtl (olddecl
);
2190 /* The NEWDECL will no longer be needed. Because every out-of-class
2191 declaration of a member results in a call to duplicate_decls,
2192 freeing these nodes represents in a significant savings. */
2198 /* Return zero if the declaration NEWDECL is valid
2199 when the declaration OLDDECL (assumed to be for the same name)
2200 has already been seen.
2201 Otherwise return an error message format string with a %s
2202 where the identifier should go. */
2205 redeclaration_error_message (tree newdecl
, tree olddecl
)
2207 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2209 /* Because C++ can put things into name space for free,
2210 constructs like "typedef struct foo { ... } foo"
2211 would look like an erroneous redeclaration. */
2212 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2215 return "redefinition of %q#D";
2217 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2219 /* If this is a pure function, its olddecl will actually be
2220 the original initialization to `0' (which we force to call
2221 abort()). Don't complain about redefinition in this case. */
2222 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2223 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2226 /* If both functions come from different namespaces, this is not
2227 a redeclaration - this is a conflict with a used function. */
2228 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2229 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2230 && ! decls_match (olddecl
, newdecl
))
2231 return "%qD conflicts with used function";
2233 /* We'll complain about linkage mismatches in
2234 warn_extern_redeclared_static. */
2236 /* Defining the same name twice is no good. */
2237 if (DECL_INITIAL (olddecl
) != NULL_TREE
2238 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2240 if (DECL_NAME (olddecl
) == NULL_TREE
)
2241 return "%q#D not declared in class";
2242 else if (!GNU_INLINE_P (olddecl
)
2243 || GNU_INLINE_P (newdecl
))
2244 return "redefinition of %q#D";
2247 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2249 bool olda
= GNU_INLINE_P (olddecl
);
2250 bool newa
= GNU_INLINE_P (newdecl
);
2255 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2257 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2263 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2267 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2269 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2270 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2271 return "redefinition of %q#D";
2275 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2276 || (DECL_TEMPLATE_RESULT (newdecl
)
2277 == DECL_TEMPLATE_RESULT (olddecl
)))
2280 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2281 if (DECL_TEMPLATE_INFO (nt
))
2282 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2283 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2284 if (DECL_TEMPLATE_INFO (ot
))
2285 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2286 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2287 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2288 return "redefinition of %q#D";
2290 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2292 bool olda
= GNU_INLINE_P (ot
);
2293 bool newa
= GNU_INLINE_P (nt
);
2298 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2300 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2304 /* Core issue #226 (C++0x):
2306 If a friend function template declaration specifies a
2307 default template-argument, that declaration shall be a
2308 definition and shall be the only declaration of the
2309 function template in the translation unit. */
2310 if ((cxx_dialect
!= cxx98
)
2311 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2312 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2313 /*is_primary=*/1, /*is_partial=*/0,
2314 /*is_friend_decl=*/2))
2315 return "redeclaration of friend %q#D may not have default template arguments";
2319 else if (TREE_CODE (newdecl
) == VAR_DECL
2320 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2321 && (! DECL_LANG_SPECIFIC (olddecl
)
2322 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2323 || DECL_THREAD_LOCAL_P (newdecl
)))
2325 /* Only variables can be thread-local, and all declarations must
2326 agree on this property. */
2327 if (DECL_THREAD_LOCAL_P (newdecl
))
2328 return "thread-local declaration of %q#D follows "
2329 "non-thread-local declaration";
2331 return "non-thread-local declaration of %q#D follows "
2332 "thread-local declaration";
2334 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2336 /* The objects have been declared at namespace scope. If either
2337 is a member of an anonymous union, then this is an invalid
2338 redeclaration. For example:
2344 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2345 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2346 return "redeclaration of %q#D";
2347 /* If at least one declaration is a reference, there is no
2348 conflict. For example:
2354 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2356 /* Reject two definitions. */
2357 return "redefinition of %q#D";
2361 /* Objects declared with block scope: */
2362 /* Reject two definitions, and reject a definition
2363 together with an external reference. */
2364 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2365 return "redeclaration of %q#D";
2370 /* Hash and equality functions for the named_label table. */
2373 named_label_entry_hash (const void *data
)
2375 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2376 return DECL_UID (ent
->label_decl
);
2380 named_label_entry_eq (const void *a
, const void *b
)
2382 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2383 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2384 return ent_a
->label_decl
== ent_b
->label_decl
;
2387 /* Create a new label, named ID. */
2390 make_label_decl (tree id
, int local_p
)
2392 struct named_label_entry
*ent
;
2396 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2398 DECL_CONTEXT (decl
) = current_function_decl
;
2399 DECL_MODE (decl
) = VOIDmode
;
2400 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2402 /* Say where one reference is to the label, for the sake of the
2403 error if it is not defined. */
2404 DECL_SOURCE_LOCATION (decl
) = input_location
;
2406 /* Record the fact that this identifier is bound to this label. */
2407 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2409 /* Create the label htab for the function on demand. */
2411 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2412 named_label_entry_eq
, NULL
);
2414 /* Record this label on the list of labels used in this function.
2415 We do this before calling make_label_decl so that we get the
2416 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2417 ent
= GGC_CNEW (struct named_label_entry
);
2418 ent
->label_decl
= decl
;
2420 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2421 gcc_assert (*slot
== NULL
);
2427 /* Look for a label named ID in the current function. If one cannot
2428 be found, create one. (We keep track of used, but undefined,
2429 labels, and complain about them at the end of a function.) */
2432 lookup_label (tree id
)
2436 timevar_push (TV_NAME_LOOKUP
);
2437 /* You can't use labels at global scope. */
2438 if (current_function_decl
== NULL_TREE
)
2440 error ("label %qE referenced outside of any function", id
);
2441 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, NULL_TREE
);
2444 /* See if we've already got this label. */
2445 decl
= IDENTIFIER_LABEL_VALUE (id
);
2446 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2447 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2449 decl
= make_label_decl (id
, /*local_p=*/0);
2450 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2453 /* Declare a local label named ID. */
2456 declare_local_label (tree id
)
2460 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2461 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2462 shadow
= tree_cons (IDENTIFIER_LABEL_VALUE (id
), NULL_TREE
,
2463 current_binding_level
->shadowed_labels
);
2464 current_binding_level
->shadowed_labels
= shadow
;
2466 decl
= make_label_decl (id
, /*local_p=*/1);
2467 TREE_VALUE (shadow
) = decl
;
2472 /* Returns nonzero if it is ill-formed to jump past the declaration of
2473 DECL. Returns 2 if it's also a real problem. */
2476 decl_jump_unsafe (tree decl
)
2478 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2479 with automatic storage duration is not in scope to a point where it is
2480 in scope is ill-formed unless the variable has scalar type, class type
2481 with a trivial default constructor and a trivial destructor, a
2482 cv-qualified version of one of these types, or an array of one of the
2483 preceding types and is declared without an initializer (8.5). */
2484 tree type
= TREE_TYPE (decl
);
2486 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2487 || type
== error_mark_node
)
2490 type
= strip_array_types (type
);
2492 if (type_has_nontrivial_default_init (TREE_TYPE (decl
))
2493 || DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2496 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2502 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2505 identify_goto (tree decl
, const location_t
*locus
)
2508 permerror (input_location
, "jump to label %qD", decl
);
2510 permerror (input_location
, "jump to case label");
2512 permerror (*locus
, " from here");
2515 /* Check that a single previously seen jump to a newly defined label
2516 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2517 the jump context; NAMES are the names in scope in LEVEL at the jump
2518 context; LOCUS is the source position of the jump or 0. Returns
2519 true if all is well. */
2522 check_previous_goto_1 (tree decl
, struct cp_binding_level
* level
, tree names
,
2523 bool exited_omp
, const location_t
*locus
)
2525 struct cp_binding_level
*b
;
2526 bool identified
= false, saw_eh
= false, saw_omp
= false;
2530 identify_goto (decl
, locus
);
2531 error (" exits OpenMP structured block");
2532 identified
= saw_omp
= true;
2535 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2537 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2539 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2540 new_decls
= TREE_CHAIN (new_decls
))
2542 int problem
= decl_jump_unsafe (new_decls
);
2548 identify_goto (decl
, locus
);
2552 error (" crosses initialization of %q+#D", new_decls
);
2554 permerror (input_location
, " enters scope of %q+#D which has "
2555 "non-trivial destructor", new_decls
);
2560 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2564 identify_goto (decl
, locus
);
2567 if (b
->kind
== sk_try
)
2568 error (" enters try block");
2570 error (" enters catch block");
2573 if (b
->kind
== sk_omp
&& !saw_omp
)
2577 identify_goto (decl
, locus
);
2580 error (" enters OpenMP structured block");
2589 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2591 check_previous_goto_1 (decl
, use
->binding_level
,
2592 use
->names_in_scope
, use
->in_omp_scope
,
2593 &use
->o_goto_locus
);
2597 check_switch_goto (struct cp_binding_level
* level
)
2599 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2602 /* Check that a new jump to a label DECL is OK. Called by
2603 finish_goto_stmt. */
2606 check_goto (tree decl
)
2608 struct named_label_entry
*ent
, dummy
;
2609 bool saw_catch
= false, identified
= false;
2612 /* We can't know where a computed goto is jumping.
2613 So we assume that it's OK. */
2614 if (TREE_CODE (decl
) != LABEL_DECL
)
2617 /* We didn't record any information about this label when we created it,
2618 and there's not much point since it's trivial to analyze as a return. */
2619 if (decl
== cdtor_label
)
2622 dummy
.label_decl
= decl
;
2623 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2624 gcc_assert (ent
!= NULL
);
2626 /* If the label hasn't been defined yet, defer checking. */
2627 if (! DECL_INITIAL (decl
))
2629 struct named_label_use_entry
*new_use
;
2631 /* Don't bother creating another use if the last goto had the
2632 same data, and will therefore create the same set of errors. */
2634 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2637 new_use
= GGC_NEW (struct named_label_use_entry
);
2638 new_use
->binding_level
= current_binding_level
;
2639 new_use
->names_in_scope
= current_binding_level
->names
;
2640 new_use
->o_goto_locus
= input_location
;
2641 new_use
->in_omp_scope
= false;
2643 new_use
->next
= ent
->uses
;
2644 ent
->uses
= new_use
;
2648 if (ent
->in_try_scope
|| ent
->in_catch_scope
2649 || ent
->in_omp_scope
|| ent
->bad_decls
)
2651 permerror (input_location
, "jump to label %q+D", decl
);
2652 permerror (input_location
, " from here");
2656 for (bad
= ent
->bad_decls
; bad
; bad
= TREE_CHAIN (bad
))
2658 tree b
= TREE_VALUE (bad
);
2659 int u
= decl_jump_unsafe (b
);
2661 if (u
> 1 && DECL_ARTIFICIAL (b
))
2663 /* Can't skip init of __exception_info. */
2664 error_at (DECL_SOURCE_LOCATION (b
), " enters catch block");
2668 error (" skips initialization of %q+#D", b
);
2670 permerror (input_location
, " enters scope of %q+#D which has "
2671 "non-trivial destructor", b
);
2674 if (ent
->in_try_scope
)
2675 error (" enters try block");
2676 else if (ent
->in_catch_scope
&& !saw_catch
)
2677 error (" enters catch block");
2679 if (ent
->in_omp_scope
)
2680 error (" enters OpenMP structured block");
2681 else if (flag_openmp
)
2683 struct cp_binding_level
*b
;
2684 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2686 if (b
== ent
->binding_level
)
2688 if (b
->kind
== sk_omp
)
2692 permerror (input_location
, "jump to label %q+D", decl
);
2693 permerror (input_location
, " from here");
2696 error (" exits OpenMP structured block");
2703 /* Check that a return is ok wrt OpenMP structured blocks.
2704 Called by finish_return_stmt. Returns true if all is well. */
2707 check_omp_return (void)
2709 struct cp_binding_level
*b
;
2710 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2711 if (b
->kind
== sk_omp
)
2713 error ("invalid exit from OpenMP structured block");
2719 /* Define a label, specifying the location in the source file.
2720 Return the LABEL_DECL node for the label. */
2723 define_label (location_t location
, tree name
)
2725 struct named_label_entry
*ent
, dummy
;
2726 struct cp_binding_level
*p
;
2729 timevar_push (TV_NAME_LOOKUP
);
2731 decl
= lookup_label (name
);
2733 dummy
.label_decl
= decl
;
2734 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2735 gcc_assert (ent
!= NULL
);
2737 /* After labels, make any new cleanups in the function go into their
2738 own new (temporary) binding contour. */
2739 for (p
= current_binding_level
;
2740 p
->kind
!= sk_function_parms
;
2742 p
->more_cleanups_ok
= 0;
2744 if (name
== get_identifier ("wchar_t"))
2745 permerror (input_location
, "label named wchar_t");
2747 if (DECL_INITIAL (decl
) != NULL_TREE
)
2749 error ("duplicate label %qD", decl
);
2750 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
2754 struct named_label_use_entry
*use
;
2756 /* Mark label as having been defined. */
2757 DECL_INITIAL (decl
) = error_mark_node
;
2758 /* Say where in the source. */
2759 DECL_SOURCE_LOCATION (decl
) = location
;
2761 ent
->binding_level
= current_binding_level
;
2762 ent
->names_in_scope
= current_binding_level
->names
;
2764 for (use
= ent
->uses
; use
; use
= use
->next
)
2765 check_previous_goto (decl
, use
);
2769 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2774 struct cp_binding_level
*level
;
2775 struct cp_switch
*next
;
2776 /* The SWITCH_STMT being built. */
2778 /* A splay-tree mapping the low element of a case range to the high
2779 element, or NULL_TREE if there is no high element. Used to
2780 determine whether or not a new case label duplicates an old case
2781 label. We need a tree, rather than simply a hash table, because
2782 of the GNU case range extension. */
2786 /* A stack of the currently active switch statements. The innermost
2787 switch statement is on the top of the stack. There is no need to
2788 mark the stack for garbage collection because it is only active
2789 during the processing of the body of a function, and we never
2790 collect at that point. */
2792 static struct cp_switch
*switch_stack
;
2794 /* Called right after a switch-statement condition is parsed.
2795 SWITCH_STMT is the switch statement being parsed. */
2798 push_switch (tree switch_stmt
)
2800 struct cp_switch
*p
= XNEW (struct cp_switch
);
2801 p
->level
= current_binding_level
;
2802 p
->next
= switch_stack
;
2803 p
->switch_stmt
= switch_stmt
;
2804 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2811 struct cp_switch
*cs
= switch_stack
;
2812 location_t switch_location
;
2814 /* Emit warnings as needed. */
2815 if (EXPR_HAS_LOCATION (cs
->switch_stmt
))
2816 switch_location
= EXPR_LOCATION (cs
->switch_stmt
);
2818 switch_location
= input_location
;
2819 if (!processing_template_decl
)
2820 c_do_switch_warnings (cs
->cases
, switch_location
,
2821 SWITCH_STMT_TYPE (cs
->switch_stmt
),
2822 SWITCH_STMT_COND (cs
->switch_stmt
));
2824 splay_tree_delete (cs
->cases
);
2825 switch_stack
= switch_stack
->next
;
2829 /* Note that we've seen a definition of a case label, and complain if this
2830 is a bad place for one. */
2833 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
2836 struct cp_binding_level
*p
;
2838 if (processing_template_decl
)
2842 /* For templates, just add the case label; we'll do semantic
2843 analysis at instantiation-time. */
2844 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2845 return add_stmt (build_case_label (loc
, low_value
, high_value
, label
));
2848 /* Find the condition on which this switch statement depends. */
2849 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
2850 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
2851 cond
= TREE_VALUE (cond
);
2853 if (!check_switch_goto (switch_stack
->level
))
2854 return error_mark_node
;
2856 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
,
2857 SWITCH_STMT_TYPE (switch_stack
->switch_stmt
),
2858 low_value
, high_value
);
2860 /* After labels, make any new cleanups in the function go into their
2861 own new (temporary) binding contour. */
2862 for (p
= current_binding_level
;
2863 p
->kind
!= sk_function_parms
;
2865 p
->more_cleanups_ok
= 0;
2870 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2873 typename_hash (const void* k
)
2876 const_tree
const t
= (const_tree
) k
;
2878 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
2879 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
2884 typedef struct typename_info
{
2892 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2893 really of type `typename_info*' */
2896 typename_compare (const void * k1
, const void * k2
)
2898 const_tree
const t1
= (const_tree
) k1
;
2899 const typename_info
*const t2
= (const typename_info
*) k2
;
2901 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
2902 && TYPE_CONTEXT (t1
) == t2
->scope
2903 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
2904 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
2905 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
2908 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2909 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2911 Returns the new TYPENAME_TYPE. */
2913 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
2916 build_typename_type (tree context
, tree name
, tree fullname
,
2917 enum tag_types tag_type
)
2925 if (typename_htab
== NULL
)
2926 typename_htab
= htab_create_ggc (61, &typename_hash
,
2927 &typename_compare
, NULL
);
2929 ti
.scope
= FROB_CONTEXT (context
);
2931 ti
.template_id
= fullname
;
2932 ti
.enum_p
= tag_type
== enum_type
;
2933 ti
.class_p
= (tag_type
== class_type
2934 || tag_type
== record_type
2935 || tag_type
== union_type
);
2936 hash
= (htab_hash_pointer (ti
.scope
)
2937 ^ htab_hash_pointer (ti
.name
));
2939 /* See if we already have this type. */
2940 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
2945 /* Build the TYPENAME_TYPE. */
2946 t
= cxx_make_type (TYPENAME_TYPE
);
2947 TYPE_CONTEXT (t
) = ti
.scope
;
2948 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
2949 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
2950 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
2952 /* Build the corresponding TYPE_DECL. */
2953 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
2954 TYPE_NAME (TREE_TYPE (d
)) = d
;
2955 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2956 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2957 DECL_ARTIFICIAL (d
) = 1;
2959 /* Store it in the hash table. */
2962 /* TYPENAME_TYPEs must always be compared structurally, because
2963 they may or may not resolve down to another type depending on
2964 the currently open classes. */
2965 SET_TYPE_STRUCTURAL_EQUALITY (t
);
2971 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2972 provided to name the type. Returns an appropriate type, unless an
2973 error occurs, in which case error_mark_node is returned. If we
2974 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2975 return that, rather than the _TYPE it corresponds to, in other
2976 cases we look through the type decl. If TF_ERROR is set, complain
2977 about errors, otherwise be quiet. */
2980 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
2981 tsubst_flags_t complain
)
2987 if (name
== error_mark_node
2988 || context
== NULL_TREE
2989 || context
== error_mark_node
)
2990 return error_mark_node
;
2994 if (!(TYPE_LANG_SPECIFIC (name
)
2995 && (CLASSTYPE_IS_TEMPLATE (name
)
2996 || CLASSTYPE_USE_TEMPLATE (name
))))
2997 name
= TYPE_IDENTIFIER (name
);
2999 /* Create a TEMPLATE_ID_EXPR for the type. */
3000 name
= build_nt (TEMPLATE_ID_EXPR
,
3001 CLASSTYPE_TI_TEMPLATE (name
),
3002 CLASSTYPE_TI_ARGS (name
));
3004 else if (TREE_CODE (name
) == TYPE_DECL
)
3005 name
= DECL_NAME (name
);
3009 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3011 name
= TREE_OPERAND (name
, 0);
3012 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3013 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3014 else if (TREE_CODE (name
) == OVERLOAD
)
3016 error ("%qD is not a type", name
);
3017 return error_mark_node
;
3020 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3022 error ("%qD used without template parameters", name
);
3023 return error_mark_node
;
3025 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3026 gcc_assert (TYPE_P (context
));
3028 if (!MAYBE_CLASS_TYPE_P (context
))
3030 if (complain
& tf_error
)
3031 error ("%q#T is not a class", context
);
3032 return error_mark_node
;
3035 /* When the CONTEXT is a dependent type, NAME could refer to a
3036 dependent base class of CONTEXT. But look inside it anyway
3037 if CONTEXT is a currently open scope, in case it refers to a
3038 member of the current instantiation or a non-dependent base;
3039 lookup will stop when we hit a dependent base. */
3040 if (!dependent_scope_p (context
))
3041 /* We should only set WANT_TYPE when we're a nested typename type.
3042 Then we can give better diagnostics if we find a non-type. */
3043 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3047 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3048 return build_typename_type (context
, name
, fullname
, tag_type
);
3050 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3054 if (complain
& tf_error
)
3055 error (want_template
? "no class template named %q#T in %q#T"
3056 : "no type named %q#T in %q#T", name
, context
);
3057 return error_mark_node
;
3060 /* Pull out the template from an injected-class-name (or multiple). */
3062 t
= maybe_get_template_decl_from_type_decl (t
);
3064 if (TREE_CODE (t
) == TREE_LIST
)
3066 if (complain
& tf_error
)
3068 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3069 print_candidates (t
);
3071 return error_mark_node
;
3074 if (want_template
&& !DECL_CLASS_TEMPLATE_P (t
))
3076 if (complain
& tf_error
)
3077 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3079 return error_mark_node
;
3081 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3083 if (complain
& tf_error
)
3084 error ("%<typename %T::%D%> names %q#T, which is not a type",
3086 return error_mark_node
;
3089 if (complain
& tf_error
)
3090 perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
);
3092 /* If we are currently parsing a template and if T is a typedef accessed
3093 through CONTEXT then we need to remember and check access of T at
3094 template instantiation time. */
3095 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3098 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3100 /*entering_scope=*/0,
3101 tf_warning_or_error
| tf_user
);
3103 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3109 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3110 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3111 in which case error_mark_node is returned.
3113 If PARM_LIST is non-NULL, also make sure that the template parameter
3114 list of TEMPLATE_DECL matches.
3116 If COMPLAIN zero, don't complain about any errors that occur. */
3119 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3120 tsubst_flags_t complain
)
3126 name
= TYPE_IDENTIFIER (name
);
3127 else if (DECL_P (name
))
3128 name
= DECL_NAME (name
);
3129 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3131 if (!dependent_type_p (context
)
3132 || currently_open_class (context
))
3134 tree tmpl
= NULL_TREE
;
3136 if (MAYBE_CLASS_TYPE_P (context
))
3137 tmpl
= lookup_field (context
, name
, 0, false);
3139 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
3141 if (complain
& tf_error
)
3142 error ("no class template named %q#T in %q#T", name
, context
);
3143 return error_mark_node
;
3147 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3149 if (complain
& tf_error
)
3151 error ("template parameters do not match template");
3152 error ("%q+D declared here", tmpl
);
3154 return error_mark_node
;
3157 if (complain
& tf_error
)
3158 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
);
3163 /* Build the UNBOUND_CLASS_TEMPLATE. */
3164 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3165 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3166 TREE_TYPE (t
) = NULL_TREE
;
3167 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3169 /* Build the corresponding TEMPLATE_DECL. */
3170 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3171 TYPE_NAME (TREE_TYPE (d
)) = d
;
3172 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3173 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3174 DECL_ARTIFICIAL (d
) = 1;
3175 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3182 /* Push the declarations of builtin types into the namespace.
3183 RID_INDEX is the index of the builtin type in the array
3184 RID_POINTERS. NAME is the name used when looking up the builtin
3185 type. TYPE is the _TYPE node for the builtin type. */
3188 record_builtin_type (enum rid rid_index
,
3192 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3193 tree tdecl
= NULL_TREE
;
3195 if ((int) rid_index
< (int) RID_MAX
)
3196 rname
= ridpointers
[(int) rid_index
];
3198 tname
= get_identifier (name
);
3200 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3201 eliminated. Built-in types should not be looked up name; their
3202 names are keywords that the parser can recognize. However, there
3203 is code in c-common.c that uses identifier_global_value to look
3204 up built-in types by name. */
3207 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3208 DECL_ARTIFICIAL (tdecl
) = 1;
3209 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3215 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3216 DECL_ARTIFICIAL (tdecl
) = 1;
3218 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3221 if (!TYPE_NAME (type
))
3222 TYPE_NAME (type
) = tdecl
;
3225 debug_hooks
->type_decl (tdecl
, 0);
3228 /* Record one of the standard Java types.
3229 * Declare it as having the given NAME.
3230 * If SIZE > 0, it is the size of one of the integral types;
3231 * otherwise it is the negative of the size of one of the other types. */
3234 record_builtin_java_type (const char* name
, int size
)
3238 type
= build_nonstandard_integer_type (size
, 0);
3239 else if (size
> -32)
3242 /* "__java_char" or ""__java_boolean". */
3243 type
= build_nonstandard_integer_type (-size
, 1);
3244 /* Get the signed type cached and attached to the unsigned type,
3245 so it doesn't get garbage-collected at "random" times,
3246 causing potential codegen differences out of different UIDs
3247 and different alias set numbers. */
3248 stype
= build_nonstandard_integer_type (-size
, 0);
3249 TREE_CHAIN (type
) = stype
;
3250 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3253 { /* "__java_float" or ""__java_double". */
3254 type
= make_node (REAL_TYPE
);
3255 TYPE_PRECISION (type
) = - size
;
3258 record_builtin_type (RID_MAX
, name
, type
);
3259 decl
= TYPE_NAME (type
);
3261 /* Suppress generate debug symbol entries for these types,
3262 since for normal C++ they are just clutter.
3263 However, push_lang_context undoes this if extern "Java" is seen. */
3264 DECL_IGNORED_P (decl
) = 1;
3266 TYPE_FOR_JAVA (type
) = 1;
3270 /* Push a type into the namespace so that the back ends ignore it. */
3273 record_unknown_type (tree type
, const char* name
)
3275 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3276 TYPE_DECL
, get_identifier (name
), type
));
3277 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3278 DECL_IGNORED_P (decl
) = 1;
3279 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3280 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3281 TYPE_ALIGN (type
) = 1;
3282 TYPE_USER_ALIGN (type
) = 0;
3283 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3286 /* A string for which we should create an IDENTIFIER_NODE at
3289 typedef struct predefined_identifier
3291 /* The name of the identifier. */
3292 const char *const name
;
3293 /* The place where the IDENTIFIER_NODE should be stored. */
3295 /* Nonzero if this is the name of a constructor or destructor. */
3296 const int ctor_or_dtor_p
;
3297 } predefined_identifier
;
3299 /* Create all the predefined identifiers. */
3302 initialize_predefined_identifiers (void)
3304 const predefined_identifier
*pid
;
3306 /* A table of identifiers to create at startup. */
3307 static const predefined_identifier predefined_identifiers
[] = {
3308 { "C++", &lang_name_cplusplus
, 0 },
3309 { "C", &lang_name_c
, 0 },
3310 { "Java", &lang_name_java
, 0 },
3311 /* Some of these names have a trailing space so that it is
3312 impossible for them to conflict with names written by users. */
3313 { "__ct ", &ctor_identifier
, 1 },
3314 { "__base_ctor ", &base_ctor_identifier
, 1 },
3315 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3316 { "__dt ", &dtor_identifier
, 1 },
3317 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3318 { "__base_dtor ", &base_dtor_identifier
, 1 },
3319 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3320 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3321 { "nelts", &nelts_identifier
, 0 },
3322 { THIS_NAME
, &this_identifier
, 0 },
3323 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3324 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3325 { "_vptr", &vptr_identifier
, 0 },
3326 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3327 { "::", &global_scope_name
, 0 },
3328 { "std", &std_identifier
, 0 },
3332 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3334 *pid
->node
= get_identifier (pid
->name
);
3335 if (pid
->ctor_or_dtor_p
)
3336 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3340 /* Create the predefined scalar types of C,
3341 and some nodes representing standard constants (0, 1, (void *)0).
3342 Initialize the global binding level.
3343 Make definitions for built-in primitive functions. */
3346 cxx_init_decl_processing (void)
3349 tree void_ftype_ptr
;
3351 build_common_tree_nodes (flag_signed_char
, false);
3353 /* Create all the identifiers we need. */
3354 initialize_predefined_identifiers ();
3356 /* Create the global variables. */
3357 push_to_top_level ();
3359 current_function_decl
= NULL_TREE
;
3360 current_binding_level
= NULL
;
3361 /* Enter the global namespace. */
3362 gcc_assert (global_namespace
== NULL_TREE
);
3363 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3365 TREE_PUBLIC (global_namespace
) = 1;
3366 begin_scope (sk_namespace
, global_namespace
);
3368 current_lang_name
= NULL_TREE
;
3370 if (flag_visibility_ms_compat
)
3371 default_visibility
= VISIBILITY_HIDDEN
;
3374 current_lang_name
= lang_name_c
;
3376 /* Create the `std' namespace. */
3377 push_namespace (std_identifier
);
3378 std_node
= current_namespace
;
3381 c_common_nodes_and_builtins ();
3383 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3384 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3385 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3386 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3387 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3388 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3389 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3390 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3392 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3393 integer_three_node
= build_int_cst (NULL_TREE
, 3);
3395 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3396 truthvalue_type_node
= boolean_type_node
;
3397 truthvalue_false_node
= boolean_false_node
;
3398 truthvalue_true_node
= boolean_true_node
;
3400 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3403 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3406 delta_type_node
= ptrdiff_type_node
;
3407 vtable_index_type
= ptrdiff_type_node
;
3409 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3410 void_ftype
= build_function_type (void_type_node
, void_list_node
);
3411 void_ftype_ptr
= build_function_type (void_type_node
,
3412 tree_cons (NULL_TREE
,
3416 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3418 /* C++ extensions */
3420 unknown_type_node
= make_node (UNKNOWN_TYPE
);
3421 record_unknown_type (unknown_type_node
, "unknown type");
3423 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3424 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3426 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3428 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3429 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3431 init_list_type_node
= make_node (UNKNOWN_TYPE
);
3432 record_unknown_type (init_list_type_node
, "init list");
3435 /* Make sure we get a unique function type, so we can give
3436 its pointer type a name. (This wins for gdb.) */
3437 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3438 TREE_TYPE (vfunc_type
) = integer_type_node
;
3439 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3440 layout_type (vfunc_type
);
3442 vtable_entry_type
= build_pointer_type (vfunc_type
);
3444 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3447 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3448 layout_type (vtbl_type_node
);
3449 vtbl_type_node
= build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3450 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3451 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3452 layout_type (vtbl_ptr_type_node
);
3453 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3455 push_namespace (get_identifier ("__cxxabiv1"));
3456 abi_node
= current_namespace
;
3459 global_type_node
= make_node (LANG_TYPE
);
3460 record_unknown_type (global_type_node
, "global type");
3463 current_lang_name
= lang_name_cplusplus
;
3467 tree bad_alloc_type_node
;
3468 tree bad_alloc_decl
;
3469 tree newtype
, deltype
;
3470 tree ptr_ftype_sizetype
;
3472 push_namespace (std_identifier
);
3473 bad_alloc_id
= get_identifier ("bad_alloc");
3474 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3475 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3477 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3478 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3482 = build_function_type (ptr_type_node
,
3483 tree_cons (NULL_TREE
,
3486 newtype
= build_exception_variant
3487 (ptr_ftype_sizetype
, add_exception_specifier
3488 (NULL_TREE
, bad_alloc_type_node
, -1));
3489 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3490 push_cp_library_fn (NEW_EXPR
, newtype
);
3491 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3492 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3493 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3497 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3499 /* Perform other language dependent initializations. */
3500 init_class_processing ();
3501 init_rtti_processing ();
3502 init_template_processing ();
3504 if (flag_exceptions
)
3505 init_exception_processing ();
3507 if (! supports_one_only ())
3510 make_fname_decl
= cp_make_fname_decl
;
3511 start_fname_decls ();
3513 /* Show we use EH for cleanups. */
3514 if (flag_exceptions
)
3515 using_eh_for_cleanups ();
3518 /* Generate an initializer for a function naming variable from
3519 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3520 filled in with the type of the init. */
3523 cp_fname_init (const char* name
, tree
*type_p
)
3525 tree domain
= NULL_TREE
;
3527 tree init
= NULL_TREE
;
3532 length
= strlen (name
);
3533 domain
= build_index_type (size_int (length
));
3534 init
= build_string (length
+ 1, name
);
3537 type
= build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3538 type
= build_cplus_array_type (type
, domain
);
3543 TREE_TYPE (init
) = type
;
3545 init
= error_mark_node
;
3550 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3551 the decl, LOC is the location to give the decl, NAME is the
3552 initialization string and TYPE_DEP indicates whether NAME depended
3553 on the type of the function. We make use of that to detect
3554 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3555 at the point of first use, so we mustn't push the decl now. */
3558 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3560 const char *const name
= (type_dep
&& processing_template_decl
3561 ? NULL
: fname_as_string (type_dep
));
3563 tree init
= cp_fname_init (name
, &type
);
3564 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3567 free (CONST_CAST (char *, name
));
3569 /* As we're using pushdecl_with_scope, we must set the context. */
3570 DECL_CONTEXT (decl
) = current_function_decl
;
3571 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3573 TREE_STATIC (decl
) = 1;
3574 TREE_READONLY (decl
) = 1;
3575 DECL_ARTIFICIAL (decl
) = 1;
3577 TREE_USED (decl
) = 1;
3579 if (current_function_decl
)
3581 struct cp_binding_level
*b
= current_binding_level
;
3582 while (b
->level_chain
->kind
!= sk_function_parms
)
3584 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3585 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3586 LOOKUP_ONLYCONVERTING
);
3589 pushdecl_top_level_and_finish (decl
, init
);
3595 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3597 tree id
= DECL_NAME (decl
);
3598 const char *name
= IDENTIFIER_POINTER (id
);
3600 retrofit_lang_decl (decl
);
3602 DECL_ARTIFICIAL (decl
) = 1;
3603 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3604 SET_DECL_LANGUAGE (decl
, lang_c
);
3605 /* Runtime library routines are, by definition, available in an
3606 external shared object. */
3607 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3608 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3610 DECL_CONTEXT (decl
) = context
;
3613 pushdecl_top_level (decl
);
3617 /* A function in the user's namespace should have an explicit
3618 declaration before it is used. Mark the built-in function as
3619 anticipated but not actually declared. */
3620 if (name
[0] != '_' || name
[1] != '_')
3621 DECL_ANTICIPATED (decl
) = 1;
3622 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3624 size_t len
= strlen (name
);
3626 /* Treat __*_chk fortification functions as anticipated as well,
3627 unless they are __builtin_*. */
3628 if (len
> strlen ("___chk")
3629 && memcmp (name
+ len
- strlen ("_chk"),
3630 "_chk", strlen ("_chk") + 1) == 0)
3631 DECL_ANTICIPATED (decl
) = 1;
3638 cxx_builtin_function (tree decl
)
3640 tree id
= DECL_NAME (decl
);
3641 const char *name
= IDENTIFIER_POINTER (id
);
3642 /* All builtins that don't begin with an '_' should additionally
3643 go in the 'std' namespace. */
3646 tree decl2
= copy_node(decl
);
3647 push_namespace (std_identifier
);
3648 builtin_function_1 (decl2
, std_node
, false);
3652 return builtin_function_1 (decl
, NULL_TREE
, false);
3655 /* Like cxx_builtin_function, but guarantee the function is added to the global
3656 scope. This is to allow function specific options to add new machine
3657 dependent builtins when the target ISA changes via attribute((target(...)))
3658 which saves space on program startup if the program does not use non-generic
3662 cxx_builtin_function_ext_scope (tree decl
)
3665 tree id
= DECL_NAME (decl
);
3666 const char *name
= IDENTIFIER_POINTER (id
);
3667 /* All builtins that don't begin with an '_' should additionally
3668 go in the 'std' namespace. */
3671 tree decl2
= copy_node(decl
);
3672 push_namespace (std_identifier
);
3673 builtin_function_1 (decl2
, std_node
, true);
3677 return builtin_function_1 (decl
, NULL_TREE
, true);
3680 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3681 function. Not called directly. */
3684 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3686 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3687 DECL_EXTERNAL (fn
) = 1;
3688 TREE_PUBLIC (fn
) = 1;
3689 DECL_ARTIFICIAL (fn
) = 1;
3690 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3691 SET_DECL_LANGUAGE (fn
, lang_c
);
3692 /* Runtime library routines are, by definition, available in an
3693 external shared object. */
3694 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3695 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3699 /* Returns the _DECL for a library function with C linkage.
3700 We assume that such functions never throw; if this is incorrect,
3701 callers should unset TREE_NOTHROW. */
3704 build_library_fn (tree name
, tree type
)
3706 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
3707 TREE_NOTHROW (fn
) = 1;
3711 /* Returns the _DECL for a library function with C++ linkage. */
3714 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3716 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3717 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3718 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3719 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3723 /* Like build_library_fn, but takes a C string instead of an
3727 build_library_fn_ptr (const char* name
, tree type
)
3729 return build_library_fn (get_identifier (name
), type
);
3732 /* Like build_cp_library_fn, but takes a C string instead of an
3736 build_cp_library_fn_ptr (const char* name
, tree type
)
3738 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3741 /* Like build_library_fn, but also pushes the function so that we will
3742 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3743 may throw exceptions listed in RAISES. */
3746 push_library_fn (tree name
, tree type
, tree raises
)
3751 type
= build_exception_variant (type
, raises
);
3753 fn
= build_library_fn (name
, type
);
3754 pushdecl_top_level (fn
);
3758 /* Like build_cp_library_fn, but also pushes the function so that it
3759 will be found by normal lookup. */
3762 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3764 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3771 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3775 push_void_library_fn (tree name
, tree parmtypes
)
3777 tree type
= build_function_type (void_type_node
, parmtypes
);
3778 return push_library_fn (name
, type
, NULL_TREE
);
3781 /* Like push_library_fn, but also note that this function throws
3782 and does not return. Used for __throw_foo and the like. */
3785 push_throw_library_fn (tree name
, tree type
)
3787 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
3788 TREE_THIS_VOLATILE (fn
) = 1;
3789 TREE_NOTHROW (fn
) = 0;
3793 /* When we call finish_struct for an anonymous union, we create
3794 default copy constructors and such. But, an anonymous union
3795 shouldn't have such things; this function undoes the damage to the
3796 anonymous union type T.
3798 (The reason that we create the synthesized methods is that we don't
3799 distinguish `union { int i; }' from `typedef union { int i; } U'.
3800 The first is an anonymous union; the second is just an ordinary
3804 fixup_anonymous_aggr (tree t
)
3808 /* Wipe out memory of synthesized methods. */
3809 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
3810 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3811 TYPE_HAS_INIT_REF (t
) = 0;
3812 TYPE_HAS_CONST_INIT_REF (t
) = 0;
3813 TYPE_HAS_ASSIGN_REF (t
) = 0;
3814 TYPE_HAS_CONST_ASSIGN_REF (t
) = 0;
3816 /* Splice the implicitly generated functions out of the TYPE_METHODS
3818 q
= &TYPE_METHODS (t
);
3821 if (DECL_ARTIFICIAL (*q
))
3822 *q
= TREE_CHAIN (*q
);
3824 q
= &TREE_CHAIN (*q
);
3827 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3828 if (TYPE_METHODS (t
))
3830 tree decl
= TYPE_MAIN_DECL (t
);
3832 if (TREE_CODE (t
) != UNION_TYPE
)
3833 error_at (DECL_SOURCE_LOCATION (decl
),
3834 "an anonymous struct cannot have function members");
3836 error_at (DECL_SOURCE_LOCATION (decl
),
3837 "an anonymous union cannot have function members");
3840 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3841 assignment operators (because they cannot have these methods themselves).
3842 For anonymous unions this is already checked because they are not allowed
3843 in any union, otherwise we have to check it. */
3844 if (TREE_CODE (t
) != UNION_TYPE
)
3848 for (field
= TYPE_FIELDS (t
); field
; field
= TREE_CHAIN (field
))
3849 if (TREE_CODE (field
) == FIELD_DECL
)
3851 type
= TREE_TYPE (field
);
3852 if (CLASS_TYPE_P (type
))
3854 if (TYPE_NEEDS_CONSTRUCTING (type
))
3855 error ("member %q+#D with constructor not allowed "
3856 "in anonymous aggregate", field
);
3857 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
3858 error ("member %q+#D with destructor not allowed "
3859 "in anonymous aggregate", field
);
3860 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type
))
3861 error ("member %q+#D with copy assignment operator "
3862 "not allowed in anonymous aggregate", field
);
3868 /* Make sure that a declaration with no declarator is well-formed, i.e.
3869 just declares a tagged type or anonymous union.
3871 Returns the type declared; or NULL_TREE if none. */
3874 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
3876 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
3877 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
3878 /* If a class, struct, or enum type is declared by the DECLSPECS
3879 (i.e, if a class-specifier, enum-specifier, or non-typename
3880 elaborated-type-specifier appears in the DECLSPECS),
3881 DECLARED_TYPE is set to the corresponding type. */
3882 tree declared_type
= NULL_TREE
;
3883 bool error_p
= false;
3885 if (declspecs
->multiple_types_p
)
3886 error ("multiple types in one declaration");
3887 else if (declspecs
->redefined_builtin_type
)
3889 if (!in_system_header
)
3890 permerror (input_location
, "redeclaration of C++ built-in type %qT",
3891 declspecs
->redefined_builtin_type
);
3896 && TYPE_P (declspecs
->type
)
3897 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
3898 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
3899 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
3900 declared_type
= declspecs
->type
;
3901 else if (declspecs
->type
== error_mark_node
)
3903 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
3904 permerror (input_location
, "declaration does not declare anything");
3905 /* Check for an anonymous union. */
3906 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
3907 && TYPE_ANONYMOUS_P (declared_type
))
3909 /* 7/3 In a simple-declaration, the optional init-declarator-list
3910 can be omitted only when declaring a class (clause 9) or
3911 enumeration (7.2), that is, when the decl-specifier-seq contains
3912 either a class-specifier, an elaborated-type-specifier with
3913 a class-key (9.1), or an enum-specifier. In these cases and
3914 whenever a class-specifier or enum-specifier is present in the
3915 decl-specifier-seq, the identifiers in these specifiers are among
3916 the names being declared by the declaration (as class-name,
3917 enum-names, or enumerators, depending on the syntax). In such
3918 cases, and except for the declaration of an unnamed bit-field (9.6),
3919 the decl-specifier-seq shall introduce one or more names into the
3920 program, or shall redeclare a name introduced by a previous
3921 declaration. [Example:
3922 enum { }; // ill-formed
3923 typedef class { }; // ill-formed
3927 error ("missing type-name in typedef-declaration");
3930 /* Anonymous unions are objects, so they can have specifiers. */;
3931 SET_ANON_AGGR_TYPE_P (declared_type
);
3933 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
3934 pedwarn (input_location
, OPT_pedantic
, "ISO C++ prohibits anonymous structs");
3939 if (declspecs
->specs
[(int)ds_inline
]
3940 || declspecs
->specs
[(int)ds_virtual
])
3941 error ("%qs can only be specified for functions",
3942 declspecs
->specs
[(int)ds_inline
]
3943 ? "inline" : "virtual");
3945 && (!current_class_type
3946 || current_scope () != current_class_type
))
3947 error ("%<friend%> can only be specified inside a class");
3948 else if (declspecs
->specs
[(int)ds_explicit
])
3949 error ("%<explicit%> can only be specified for constructors");
3950 else if (declspecs
->storage_class
)
3951 error ("a storage class can only be specified for objects "
3953 else if (declspecs
->specs
[(int)ds_const
]
3954 || declspecs
->specs
[(int)ds_volatile
]
3955 || declspecs
->specs
[(int)ds_restrict
]
3956 || declspecs
->specs
[(int)ds_thread
])
3957 error ("qualifiers can only be specified for objects "
3959 else if (saw_typedef
)
3960 warning (0, "%<typedef%> was ignored in this declaration");
3961 else if (declspecs
->specs
[(int) ds_constexpr
])
3962 error ("%<constexpr> cannot be used for type declarations");
3965 return declared_type
;
3968 /* Called when a declaration is seen that contains no names to declare.
3969 If its type is a reference to a structure, union or enum inherited
3970 from a containing scope, shadow that tag name for the current scope
3971 with a forward reference.
3972 If its type defines a new named structure or union
3973 or defines an enum, it is valid but we need not do anything here.
3974 Otherwise, it is an error.
3976 C++: may have to grok the declspecs to learn about static,
3977 complain for anonymous unions.
3979 Returns the TYPE declared -- or NULL_TREE if none. */
3982 shadow_tag (cp_decl_specifier_seq
*declspecs
)
3984 tree t
= check_tag_decl (declspecs
);
3989 if (declspecs
->attributes
)
3991 warning (0, "attribute ignored in declaration of %q+#T", t
);
3992 warning (0, "attribute for %q+#T must follow the %qs keyword",
3993 t
, class_key_or_enum_as_string (t
));
3997 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4000 /* This is where the variables in an anonymous union are
4001 declared. An anonymous union declaration looks like:
4003 because there is no declarator after the union, the parser
4004 sends that declaration here. */
4005 if (ANON_AGGR_TYPE_P (t
))
4007 fixup_anonymous_aggr (t
);
4009 if (TYPE_FIELDS (t
))
4011 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4012 declspecs
, NORMAL
, 0, NULL
);
4013 finish_anon_union (decl
);
4020 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4023 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4024 const cp_declarator
*declarator
,
4025 bool is_template_arg
)
4029 enum decl_context context
4030 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4031 attrs
= type_specifiers
->attributes
;
4032 type_specifiers
->attributes
= NULL_TREE
;
4033 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4034 if (attrs
&& type
!= error_mark_node
)
4036 if (CLASS_TYPE_P (type
))
4037 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4038 "outside of definition", type
);
4039 else if (MAYBE_CLASS_TYPE_P (type
))
4040 /* A template type parameter or other dependent type. */
4041 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4042 "type %qT without an associated declaration", type
);
4044 cplus_decl_attributes (&type
, attrs
, 0);
4049 /* Process a DECLARATOR for a function-scope variable declaration,
4050 namespace-scope variable declaration, or function declaration.
4051 (Function definitions go through start_function; class member
4052 declarations appearing in the body of the class go through
4053 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4054 If an error occurs, the error_mark_node is returned instead.
4056 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4057 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4058 for an explicitly defaulted function, or SD_DELETED for an explicitly
4059 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4060 implicitly initialized via a default constructor. ATTRIBUTES and
4061 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4062 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4063 set, the caller is responsible for calling pop_scope. */
4066 start_decl (const cp_declarator
*declarator
,
4067 cp_decl_specifier_seq
*declspecs
,
4070 tree prefix_attributes
,
4071 tree
*pushed_scope_p
)
4079 *pushed_scope_p
= NULL_TREE
;
4081 /* An object declared as __attribute__((deprecated)) suppresses
4082 warnings of uses of other deprecated items. */
4083 if (lookup_attribute ("deprecated", attributes
))
4084 deprecated_state
= DEPRECATED_SUPPRESS
;
4086 attributes
= chainon (attributes
, prefix_attributes
);
4088 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4091 deprecated_state
= DEPRECATED_NORMAL
;
4093 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
4094 || decl
== error_mark_node
)
4095 return error_mark_node
;
4097 type
= TREE_TYPE (decl
);
4099 context
= DECL_CONTEXT (decl
);
4103 *pushed_scope_p
= push_scope (context
);
4105 /* We are only interested in class contexts, later. */
4106 if (TREE_CODE (context
) == NAMESPACE_DECL
)
4107 context
= NULL_TREE
;
4111 /* Is it valid for this decl to have an initializer at all?
4112 If not, set INITIALIZED to zero, which will indirectly
4113 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4114 switch (TREE_CODE (decl
))
4117 error ("typedef %qD is initialized (use decltype instead)", decl
);
4118 return error_mark_node
;
4121 if (initialized
== SD_DELETED
)
4122 /* We'll handle the rest of the semantics later, but we need to
4123 set this now so it's visible to duplicate_decls. */
4124 DECL_DELETED_FN (decl
) = 1;
4133 if (! toplevel_bindings_p ()
4134 && DECL_EXTERNAL (decl
))
4135 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4137 DECL_EXTERNAL (decl
) = 0;
4138 if (toplevel_bindings_p ())
4139 TREE_STATIC (decl
) = 1;
4142 /* If this is a typedef that names the class for linkage purposes
4143 (7.1.3p8), apply any attributes directly to the type. */
4144 if (TREE_CODE (decl
) == TYPE_DECL
4145 && TAGGED_TYPE_P (TREE_TYPE (decl
))
4146 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4147 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4151 /* Set attributes here so if duplicate decl, will have proper attributes. */
4152 cplus_decl_attributes (&decl
, attributes
, flags
);
4154 /* Dllimported symbols cannot be defined. Static data members (which
4155 can be initialized in-class and dllimported) go through grokfield,
4156 not here, so we don't need to exclude those decls when checking for
4158 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4160 error ("definition of %q#D is marked %<dllimport%>", decl
);
4161 DECL_DLLIMPORT_P (decl
) = 0;
4164 /* If #pragma weak was used, mark the decl weak now. */
4165 maybe_apply_pragma_weak (decl
);
4167 if (TREE_CODE (decl
) == FUNCTION_DECL
4168 && DECL_DECLARED_INLINE_P (decl
)
4169 && DECL_UNINLINABLE (decl
)
4170 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4171 warning (0, "inline function %q+D given attribute noinline", decl
);
4173 if (context
&& COMPLETE_TYPE_P (complete_type (context
)))
4175 if (TREE_CODE (decl
) == VAR_DECL
)
4177 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4178 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4179 error ("%q#D is not a static member of %q#T", decl
, context
);
4182 if (DECL_CONTEXT (field
) != context
)
4184 if (!same_type_p (DECL_CONTEXT (field
), context
))
4185 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4186 "to be defined as %<%T::%D%>",
4187 DECL_CONTEXT (field
), DECL_NAME (decl
),
4188 context
, DECL_NAME (decl
));
4189 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4191 if (processing_specialization
4192 && template_class_depth (context
) == 0
4193 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
4194 error ("template header not allowed in member definition "
4195 "of explicitly specialized class");
4196 /* Static data member are tricky; an in-class initialization
4197 still doesn't provide a definition, so the in-class
4198 declaration will have DECL_EXTERNAL set, but will have an
4199 initialization. Thus, duplicate_decls won't warn
4200 about this situation, and so we check here. */
4201 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4202 error ("duplicate initialization of %qD", decl
);
4203 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4205 if (declspecs
->specs
[(int) ds_constexpr
]
4206 && !DECL_DECLARED_CONSTEXPR_P (field
))
4207 error ("%qD declared %<constexpr%> outside its class", field
);
4212 tree field
= check_classfn (context
, decl
,
4213 (processing_template_decl
4214 > template_class_depth (context
))
4215 ? current_template_parms
4217 if (field
&& field
!= error_mark_node
4218 && duplicate_decls (decl
, field
,
4219 /*newdecl_is_friend=*/false))
4223 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4224 DECL_IN_AGGR_P (decl
) = 0;
4225 /* Do not mark DECL as an explicit specialization if it was not
4226 already marked as an instantiation; a declaration should
4227 never be marked as a specialization unless we know what
4228 template is being specialized. */
4229 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4231 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4233 /* [temp.expl.spec] An explicit specialization of a static data
4234 member of a template is a definition if the declaration
4235 includes an initializer; otherwise, it is a declaration.
4237 We check for processing_specialization so this only applies
4238 to the new specialization syntax. */
4239 if (!initialized
&& processing_specialization
)
4240 DECL_EXTERNAL (decl
) = 1;
4243 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
))
4244 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4247 if (!ensure_literal_type_for_constexpr_object (decl
))
4248 return error_mark_node
;
4251 was_public
= TREE_PUBLIC (decl
);
4253 /* Enter this declaration into the symbol table. */
4254 decl
= maybe_push_decl (decl
);
4256 if (processing_template_decl
)
4257 decl
= push_template_decl (decl
);
4258 if (decl
== error_mark_node
)
4259 return error_mark_node
;
4261 /* Tell the back end to use or not use .common as appropriate. If we say
4262 -fconserve-space, we want this to save .data space, at the expense of
4263 wrong semantics. If we say -fno-conserve-space, we want this to
4264 produce errors about redefs; to do this we force variables into the
4266 if (flag_conserve_space
4267 && TREE_CODE (decl
) == VAR_DECL
4268 && TREE_PUBLIC (decl
)
4269 && !DECL_THREAD_LOCAL_P (decl
)
4270 && !have_global_bss_p ())
4271 DECL_COMMON (decl
) = 1;
4273 if (TREE_CODE (decl
) == VAR_DECL
4274 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4275 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4277 /* This is a const variable with implicit 'static'. Set
4278 DECL_THIS_STATIC so we can tell it from variables that are
4279 !TREE_PUBLIC because of the anonymous namespace. */
4280 gcc_assert (cp_type_readonly (TREE_TYPE (decl
)));
4281 DECL_THIS_STATIC (decl
) = 1;
4284 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4285 start_decl_1 (decl
, initialized
);
4290 /* Process the declaration of a variable DECL. INITIALIZED is true
4291 iff DECL is explicitly initialized. (INITIALIZED is false if the
4292 variable is initialized via an implicitly-called constructor.)
4293 This function must be called for ordinary variables (including, for
4294 example, implicit instantiations of templates), but must not be
4295 called for template declarations. */
4298 start_decl_1 (tree decl
, bool initialized
)
4302 bool aggregate_definition_p
;
4304 gcc_assert (!processing_template_decl
);
4306 if (error_operand_p (decl
))
4309 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4311 type
= TREE_TYPE (decl
);
4312 complete_p
= COMPLETE_TYPE_P (type
);
4313 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4315 /* If an explicit initializer is present, or if this is a definition
4316 of an aggregate, then we need a complete type at this point.
4317 (Scalars are always complete types, so there is nothing to
4318 check.) This code just sets COMPLETE_P; errors (if necessary)
4319 are issued below. */
4320 if ((initialized
|| aggregate_definition_p
)
4322 && COMPLETE_TYPE_P (complete_type (type
)))
4325 /* We will not yet have set TREE_READONLY on DECL if the type
4326 was "const", but incomplete, before this point. But, now, we
4327 have a complete type, so we can try again. */
4328 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4332 /* Is it valid for this decl to have an initializer at all? */
4334 /* Don't allow initializations for incomplete types except for
4335 arrays which might be completed by the initialization. */
4337 ; /* A complete type is ok. */
4338 else if (type_uses_auto (type
))
4339 ; /* An auto type is ok. */
4340 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4342 error ("variable %q#D has initializer but incomplete type", decl
);
4343 type
= TREE_TYPE (decl
) = error_mark_node
;
4345 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4347 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4348 error ("elements of array %q#D have incomplete type", decl
);
4349 /* else we already gave an error in start_decl. */
4352 else if (aggregate_definition_p
&& !complete_p
)
4354 if (type_uses_auto (type
))
4355 error ("declaration of %q#D has no initializer", decl
);
4357 error ("aggregate %q#D has incomplete type and cannot be defined",
4359 /* Change the type so that assemble_variable will give
4360 DECL an rtl we can live with: (mem (const_int 0)). */
4361 type
= TREE_TYPE (decl
) = error_mark_node
;
4364 /* Create a new scope to hold this declaration if necessary.
4365 Whether or not a new scope is necessary cannot be determined
4366 until after the type has been completed; if the type is a
4367 specialization of a class template it is not until after
4368 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4369 will be set correctly. */
4370 maybe_push_cleanup_level (type
);
4373 /* Handle initialization of references. DECL, TYPE, and INIT have the
4374 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4375 but will be set to a new CLEANUP_STMT if a temporary is created
4376 that must be destroyed subsequently.
4378 Returns an initializer expression to use to initialize DECL, or
4379 NULL if the initialization can be performed statically.
4381 Quotes on semantics can be found in ARM 8.4.3. */
4384 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
4388 if (init
== NULL_TREE
)
4390 if ((DECL_LANG_SPECIFIC (decl
) == 0
4391 || DECL_IN_AGGR_P (decl
) == 0)
4392 && ! DECL_THIS_EXTERN (decl
))
4393 error ("%qD declared as reference but not initialized", decl
);
4397 if (TREE_CODE (init
) == TREE_LIST
)
4398 init
= build_x_compound_expr_from_list (init
, "initializer");
4400 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4401 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4402 /* Note: default conversion is only called in very special cases. */
4403 init
= decay_conversion (init
);
4405 /* Convert INIT to the reference type TYPE. This may involve the
4406 creation of a temporary, whose lifetime must be the same as that
4407 of the reference. If so, a DECL_EXPR for the temporary will be
4408 added just after the DECL_EXPR for DECL. That's why we don't set
4409 DECL_INITIAL for local references (instead assigning to them
4410 explicitly); we need to allow the temporary to be initialized
4412 tmp
= initialize_reference (type
, init
, decl
, cleanup
, tf_warning_or_error
);
4414 if (tmp
== error_mark_node
)
4416 else if (tmp
== NULL_TREE
)
4418 error ("cannot initialize %qT from %qT", type
, TREE_TYPE (init
));
4422 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
4425 DECL_INITIAL (decl
) = tmp
;
4430 /* Subroutine of check_initializer. We're initializing a DECL of
4431 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4432 extend the lifetime of the underlying array to match that of the decl,
4433 just like for reference initialization. CLEANUP is as for
4434 grok_reference_init. */
4437 build_init_list_var_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
4439 tree aggr_init
, array
, arrtype
;
4440 init
= perform_implicit_conversion (type
, init
, tf_warning_or_error
);
4441 if (error_operand_p (init
))
4442 return error_mark_node
;
4444 aggr_init
= TARGET_EXPR_INITIAL (init
);
4445 init
= build2 (INIT_EXPR
, type
, decl
, init
);
4447 array
= AGGR_INIT_EXPR_ARG (aggr_init
, 1);
4448 arrtype
= TREE_TYPE (array
);
4450 gcc_assert (TREE_CODE (array
) == ADDR_EXPR
);
4451 array
= TREE_OPERAND (array
, 0);
4452 /* If the array is constant, finish_compound_literal already made it a
4453 static variable and we don't need to do anything here. */
4454 if (decl
&& TREE_CODE (array
) == TARGET_EXPR
)
4457 tree var
= set_up_extended_ref_temp (decl
, array
, cleanup
, &subinit
);
4458 var
= build_address (var
);
4459 var
= convert (arrtype
, var
);
4460 AGGR_INIT_EXPR_ARG (aggr_init
, 1) = var
;
4461 init
= build2 (COMPOUND_EXPR
, TREE_TYPE (init
), subinit
, init
);
4466 /* Designated initializers in arrays are not supported in GNU C++.
4467 The parser cannot detect this error since it does not know whether
4468 a given brace-enclosed initializer is for a class type or for an
4469 array. This function checks that CE does not use a designated
4470 initializer. If it does, an error is issued. Returns true if CE
4471 is valid, i.e., does not have a designated initializer. */
4474 check_array_designated_initializer (const constructor_elt
*ce
)
4476 /* Designated initializers for array elements are not supported. */
4479 /* The parser only allows identifiers as designated
4481 if (ce
->index
== error_mark_node
)
4482 error ("name used in a GNU-style designated "
4483 "initializer for an array");
4486 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4487 error ("name %qD used in a GNU-style designated "
4488 "initializer for an array", ce
->index
);
4496 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4497 array until we finish parsing the initializer. If that's the
4498 situation we're in, update DECL accordingly. */
4501 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4503 tree type
= TREE_TYPE (decl
);
4505 if (TREE_CODE (type
) == ARRAY_TYPE
4506 && TYPE_DOMAIN (type
) == NULL_TREE
4507 && TREE_CODE (decl
) != TYPE_DECL
)
4509 /* do_default is really a C-ism to deal with tentative definitions.
4510 But let's leave it here to ease the eventual merge. */
4511 int do_default
= !DECL_EXTERNAL (decl
);
4512 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4515 /* Check that there are no designated initializers in INIT, as
4516 those are not supported in GNU C++, and as the middle-end
4517 will crash if presented with a non-numeric designated
4519 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4521 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4522 constructor_elt
*ce
;
4525 VEC_iterate (constructor_elt
, v
, i
, ce
);
4527 if (!check_array_designated_initializer (ce
))
4533 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4537 error ("initializer fails to determine size of %qD", decl
);
4538 TREE_TYPE (decl
) = error_mark_node
;
4540 else if (failure
== 2)
4544 error ("array size missing in %qD", decl
);
4545 TREE_TYPE (decl
) = error_mark_node
;
4547 /* If a `static' var's size isn't known, make it extern as
4548 well as static, so it does not get allocated. If it's not
4549 `static', then don't mark it extern; finish_incomplete_decl
4550 will give it a default size and it will get allocated. */
4551 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4552 DECL_EXTERNAL (decl
) = 1;
4554 else if (failure
== 3)
4556 error ("zero-size array %qD", decl
);
4557 TREE_TYPE (decl
) = error_mark_node
;
4561 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4563 relayout_decl (decl
);
4567 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4568 any appropriate error messages regarding the layout. */
4571 layout_var_decl (tree decl
)
4575 type
= TREE_TYPE (decl
);
4576 if (type
== error_mark_node
)
4579 /* If we haven't already layed out this declaration, do so now.
4580 Note that we must not call complete type for an external object
4581 because it's type might involve templates that we are not
4582 supposed to instantiate yet. (And it's perfectly valid to say
4583 `extern X x' for some incomplete type `X'.) */
4584 if (!DECL_EXTERNAL (decl
))
4585 complete_type (type
);
4586 if (!DECL_SIZE (decl
)
4587 && TREE_TYPE (decl
) != error_mark_node
4588 && (COMPLETE_TYPE_P (type
)
4589 || (TREE_CODE (type
) == ARRAY_TYPE
4590 && !TYPE_DOMAIN (type
)
4591 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4592 layout_decl (decl
, 0);
4594 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4596 /* An automatic variable with an incomplete type: that is an error.
4597 Don't talk about array types here, since we took care of that
4598 message in grokdeclarator. */
4599 error ("storage size of %qD isn't known", decl
);
4600 TREE_TYPE (decl
) = error_mark_node
;
4603 /* Keep this code around in case we later want to control debug info
4604 based on whether a type is "used". (jason 1999-11-11) */
4606 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4607 /* Let debugger know it should output info for this type. */
4608 note_debug_info_needed (ttype
);
4610 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4611 note_debug_info_needed (DECL_CONTEXT (decl
));
4614 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4615 && DECL_SIZE (decl
) != NULL_TREE
4616 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4618 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4619 constant_expression_warning (DECL_SIZE (decl
));
4622 error ("storage size of %qD isn't constant", decl
);
4623 TREE_TYPE (decl
) = error_mark_node
;
4628 /* If a local static variable is declared in an inline function, or if
4629 we have a weak definition, we must endeavor to create only one
4630 instance of the variable at link-time. */
4633 maybe_commonize_var (tree decl
)
4635 /* Static data in a function with comdat linkage also has comdat
4637 if (TREE_STATIC (decl
)
4638 /* Don't mess with __FUNCTION__. */
4639 && ! DECL_ARTIFICIAL (decl
)
4640 && DECL_FUNCTION_SCOPE_P (decl
)
4641 && vague_linkage_fn_p (DECL_CONTEXT (decl
)))
4645 /* With weak symbols, we simply make the variable COMDAT;
4646 that will cause copies in multiple translations units to
4648 comdat_linkage (decl
);
4652 if (DECL_INITIAL (decl
) == NULL_TREE
4653 || DECL_INITIAL (decl
) == error_mark_node
)
4655 /* Without weak symbols, we can use COMMON to merge
4656 uninitialized variables. */
4657 TREE_PUBLIC (decl
) = 1;
4658 DECL_COMMON (decl
) = 1;
4662 /* While for initialized variables, we must use internal
4663 linkage -- which means that multiple copies will not
4665 TREE_PUBLIC (decl
) = 0;
4666 DECL_COMMON (decl
) = 0;
4667 warning_at (input_location
, 0,
4668 "sorry: semantics of inline function static "
4669 "data %q+#D are wrong (you'll wind up "
4670 "with multiple copies)", decl
);
4671 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4672 " you can work around this by removing "
4677 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4678 /* Set it up again; we might have set DECL_INITIAL since the last
4680 comdat_linkage (decl
);
4683 /* Issue an error message if DECL is an uninitialized const variable. */
4686 check_for_uninitialized_const_var (tree decl
)
4688 tree type
= TREE_TYPE (decl
);
4690 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_DECLARED_CONSTEXPR_P (decl
)
4691 && DECL_INITIAL (decl
) == NULL
)
4692 error ("missing initializer for constexpr %qD", decl
);
4694 /* ``Unless explicitly declared extern, a const object does not have
4695 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4697 else if (TREE_CODE (decl
) == VAR_DECL
4698 && TREE_CODE (type
) != REFERENCE_TYPE
4699 && CP_TYPE_CONST_P (type
)
4700 && !TYPE_NEEDS_CONSTRUCTING (type
)
4701 && !DECL_INITIAL (decl
))
4702 error ("uninitialized const %qD", decl
);
4706 /* Structure holding the current initializer being processed by reshape_init.
4707 CUR is a pointer to the current element being processed, END is a pointer
4708 after the last element present in the initializer. */
4709 typedef struct reshape_iterator_t
4711 constructor_elt
*cur
;
4712 constructor_elt
*end
;
4715 static tree
reshape_init_r (tree
, reshape_iter
*, bool);
4717 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4718 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4719 initialized. If there are no more such fields, the return value
4723 next_initializable_field (tree field
)
4726 && (TREE_CODE (field
) != FIELD_DECL
4727 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4728 || DECL_ARTIFICIAL (field
)))
4729 field
= TREE_CHAIN (field
);
4734 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4735 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4736 INTEGER_CST representing the size of the array minus one (the maximum index),
4737 or NULL_TREE if the array was declared without specifying the size. D is
4738 the iterator within the constructor. */
4741 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
)
4744 bool sized_array_p
= (max_index
!= NULL_TREE
);
4745 unsigned HOST_WIDE_INT max_index_cst
= 0;
4746 unsigned HOST_WIDE_INT index
;
4748 /* The initializer for an array is always a CONSTRUCTOR. */
4749 new_init
= build_constructor (init_list_type_node
, NULL
);
4753 /* Minus 1 is used for zero sized arrays. */
4754 if (integer_all_onesp (max_index
))
4757 if (host_integerp (max_index
, 1))
4758 max_index_cst
= tree_low_cst (max_index
, 1);
4759 /* sizetype is sign extended, not zero extended. */
4761 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
4765 /* Loop until there are no more initializers. */
4767 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
4772 check_array_designated_initializer (d
->cur
);
4773 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false);
4774 if (elt_init
== error_mark_node
)
4775 return error_mark_node
;
4776 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), NULL_TREE
, elt_init
);
4782 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4783 Parameters are the same of reshape_init_r. */
4786 reshape_init_array (tree type
, reshape_iter
*d
)
4788 tree max_index
= NULL_TREE
;
4790 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
4792 if (TYPE_DOMAIN (type
))
4793 max_index
= array_type_nelts (type
);
4795 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
);
4798 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4799 Parameters are the same of reshape_init_r. */
4802 reshape_init_vector (tree type
, reshape_iter
*d
)
4804 tree max_index
= NULL_TREE
;
4807 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
4809 if (COMPOUND_LITERAL_P (d
->cur
->value
))
4811 tree value
= d
->cur
->value
;
4812 if (!same_type_p (TREE_TYPE (value
), type
))
4814 error ("invalid type %qT as initializer for a vector of type %qT",
4815 TREE_TYPE (d
->cur
->value
), type
);
4816 value
= error_mark_node
;
4822 /* For a vector, the representation type is a struct
4823 containing a single member which is an array of the
4824 appropriate size. */
4825 rtype
= TYPE_DEBUG_REPRESENTATION_TYPE (type
);
4826 if (rtype
&& TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype
))))
4827 max_index
= array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype
)));
4829 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
);
4832 /* Subroutine of reshape_init_r, processes the initializers for classes
4833 or union. Parameters are the same of reshape_init_r. */
4836 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
)
4841 gcc_assert (CLASS_TYPE_P (type
));
4843 /* The initializer for a class is always a CONSTRUCTOR. */
4844 new_init
= build_constructor (init_list_type_node
, NULL
);
4845 field
= next_initializable_field (TYPE_FIELDS (type
));
4851 An initializer for an aggregate member that is an
4852 empty class shall have the form of an empty
4853 initializer-list {}. */
4854 if (!first_initializer_p
)
4856 error ("initializer for %qT must be brace-enclosed", type
);
4857 return error_mark_node
;
4862 /* Loop through the initializable fields, gathering initializers. */
4863 while (d
->cur
!= d
->end
)
4867 /* Handle designated initializers, as an extension. */
4870 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
4872 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
4874 error ("%qT has no non-static data member named %qD", type
,
4876 return error_mark_node
;
4880 /* If we processed all the member of the class, we are done. */
4884 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
4885 /*first_initializer_p=*/false);
4886 if (field_init
== error_mark_node
)
4887 return error_mark_node
;
4889 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
4893 When a union is initialized with a brace-enclosed
4894 initializer, the braces shall only contain an
4895 initializer for the first member of the union. */
4896 if (TREE_CODE (type
) == UNION_TYPE
)
4899 field
= next_initializable_field (TREE_CHAIN (field
));
4905 /* Subroutine of reshape_init, which processes a single initializer (part of
4906 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4907 iterator within the CONSTRUCTOR which points to the initializer to process.
4908 FIRST_INITIALIZER_P is true if this is the first initializer of the
4909 outermost CONSTRUCTOR node. */
4912 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
)
4914 tree init
= d
->cur
->value
;
4916 if (error_operand_p (init
))
4917 return error_mark_node
;
4919 /* A non-aggregate type is always initialized with a single
4921 if (!CP_AGGREGATE_TYPE_P (type
))
4923 /* It is invalid to initialize a non-aggregate type with a
4924 brace-enclosed initializer before C++0x.
4925 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4926 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4927 a CONSTRUCTOR (with a record type). */
4928 if (TREE_CODE (init
) == CONSTRUCTOR
4929 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
4931 if (SCALAR_TYPE_P (type
))
4933 error ("braces around scalar initializer for type %qT", type
);
4934 init
= error_mark_node
;
4937 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
4946 All implicit type conversions (clause _conv_) are considered when
4947 initializing the aggregate member with an initializer from an
4948 initializer-list. If the initializer can initialize a member,
4949 the member is initialized. Otherwise, if the member is itself a
4950 non-empty subaggregate, brace elision is assumed and the
4951 initializer is considered for the initialization of the first
4952 member of the subaggregate. */
4953 if (TREE_CODE (init
) != CONSTRUCTOR
4954 /* But don't try this for the first initializer, since that would be
4955 looking through the outermost braces; A a2 = { a1 }; is not a
4956 valid aggregate initialization. */
4957 && !first_initializer_p
4958 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
4959 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
)))
4965 /* [dcl.init.string]
4967 A char array (whether plain char, signed char, or unsigned char)
4968 can be initialized by a string-literal (optionally enclosed in
4969 braces); a wchar_t array can be initialized by a wide
4970 string-literal (optionally enclosed in braces). */
4971 if (TREE_CODE (type
) == ARRAY_TYPE
4972 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
4974 tree str_init
= init
;
4976 /* Strip one level of braces if and only if they enclose a single
4977 element (as allowed by [dcl.init.string]). */
4978 if (!first_initializer_p
4979 && TREE_CODE (str_init
) == CONSTRUCTOR
4980 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
4982 str_init
= VEC_index (constructor_elt
,
4983 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
4986 /* If it's a string literal, then it's the initializer for the array
4987 as a whole. Otherwise, continue with normal initialization for
4988 array types (one value per array element). */
4989 if (TREE_CODE (str_init
) == STRING_CST
)
4996 /* The following cases are about aggregates. If we are not within a full
4997 initializer already, and there is not a CONSTRUCTOR, it means that there
4998 is a missing set of braces (that is, we are processing the case for
4999 which reshape_init exists). */
5000 if (!first_initializer_p
)
5002 if (TREE_CODE (init
) == CONSTRUCTOR
)
5004 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5005 /* There is no need to reshape pointer-to-member function
5006 initializers, as they are always constructed correctly
5007 by the front end. */
5009 else if (COMPOUND_LITERAL_P (init
))
5010 /* For a nested compound literal, there is no need to reshape since
5011 brace elision is not allowed. Even if we decided to allow it,
5012 we should add a call to reshape_init in finish_compound_literal,
5013 before calling digest_init, so changing this code would still
5014 not be necessary. */
5015 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5019 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5020 return reshape_init (type
, init
);
5024 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5028 /* Dispatch to specialized routines. */
5029 if (CLASS_TYPE_P (type
))
5030 return reshape_init_class (type
, d
, first_initializer_p
);
5031 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5032 return reshape_init_array (type
, d
);
5033 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5034 return reshape_init_vector (type
, d
);
5039 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5040 brace-enclosed aggregate initializer.
5042 INIT is the CONSTRUCTOR containing the list of initializers describing
5043 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5044 It may not presently match the shape of the TYPE; for example:
5046 struct S { int a; int b; };
5047 struct S a[] = { 1, 2, 3, 4 };
5049 Here INIT will hold a VEC of four elements, rather than a
5050 VEC of two elements, each itself a VEC of two elements. This
5051 routine transforms INIT from the former form into the latter. The
5052 revised CONSTRUCTOR node is returned. */
5055 reshape_init (tree type
, tree init
)
5057 VEC(constructor_elt
, gc
) *v
;
5061 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5063 v
= CONSTRUCTOR_ELTS (init
);
5065 /* An empty constructor does not need reshaping, and it is always a valid
5067 if (VEC_empty (constructor_elt
, v
))
5070 /* Recurse on this CONSTRUCTOR. */
5071 d
.cur
= VEC_index (constructor_elt
, v
, 0);
5072 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
5074 new_init
= reshape_init_r (type
, &d
, true);
5075 if (new_init
== error_mark_node
)
5076 return error_mark_node
;
5078 /* Make sure all the element of the constructor were used. Otherwise,
5079 issue an error about exceeding initializers. */
5081 error ("too many initializers for %qT", type
);
5086 /* Verify array initializer. Returns true if errors have been reported. */
5089 check_array_initializer (tree decl
, tree type
, tree init
)
5091 tree element_type
= TREE_TYPE (type
);
5093 /* The array type itself need not be complete, because the
5094 initializer may tell us how many elements are in the array.
5095 But, the elements of the array must be complete. */
5096 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5099 error ("elements of array %q#D have incomplete type", decl
);
5101 error ("elements of array %q#T have incomplete type", type
);
5104 /* It is not valid to initialize a VLA. */
5106 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5107 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5110 error ("variable-sized object %qD may not be initialized", decl
);
5112 error ("variable-sized compound literal");
5118 /* Subroutine of check_initializer; args are passed down from that function.
5119 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5122 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5125 int saved_stmts_are_full_exprs_p
= 0;
5126 if (building_stmt_tree ())
5128 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5129 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5131 init
= build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5132 if (building_stmt_tree ())
5133 current_stmt_tree ()->stmts_are_full_exprs_p
=
5134 saved_stmts_are_full_exprs_p
;
5138 /* Verify INIT (the initializer for DECL), and record the
5139 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5140 grok_reference_init.
5142 If the return value is non-NULL, it is an expression that must be
5143 evaluated dynamically to initialize DECL. */
5146 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
5148 tree type
= TREE_TYPE (decl
);
5149 tree init_code
= NULL
;
5151 /* Things that are going to be initialized need to have complete
5153 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5155 if (type
== error_mark_node
)
5156 /* We will have already complained. */
5159 if (TREE_CODE (type
) == ARRAY_TYPE
)
5161 if (check_array_initializer (decl
, type
, init
))
5164 else if (!COMPLETE_TYPE_P (type
))
5166 error ("%qD has incomplete type", decl
);
5167 TREE_TYPE (decl
) = error_mark_node
;
5171 /* There is no way to make a variable-sized class type in GNU C++. */
5172 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5174 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5176 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
5177 if (SCALAR_TYPE_P (type
))
5181 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5182 init
= build_zero_init (type
, NULL_TREE
, false);
5184 else if (init_len
!= 1)
5186 error ("scalar object %qD requires one element in initializer",
5188 TREE_TYPE (decl
) = error_mark_node
;
5194 if (TREE_CODE (decl
) == CONST_DECL
)
5196 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5198 DECL_INITIAL (decl
) = init
;
5200 gcc_assert (init
!= NULL_TREE
);
5203 else if (!DECL_EXTERNAL (decl
) && TREE_CODE (type
) == REFERENCE_TYPE
)
5204 init
= grok_reference_init (decl
, type
, init
, cleanup
);
5207 /* Do not reshape constructors of vectors (they don't need to be
5209 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5211 if (is_std_init_list (type
))
5212 return build_init_list_var_init (decl
, type
, init
, cleanup
);
5213 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5215 /* Don't reshape if the class has constructors. */
5216 if (cxx_dialect
== cxx98
)
5217 error ("in C++98 %qD must be initialized by constructor, "
5220 init
= build_tree_list (NULL_TREE
, init
);
5222 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5224 error ("opaque vector types cannot be initialized");
5225 init
= error_mark_node
;
5228 init
= reshape_init (type
, init
);
5231 /* If DECL has an array type without a specific bound, deduce the
5232 array size from the initializer. */
5233 maybe_deduce_size_from_array_init (decl
, init
);
5234 type
= TREE_TYPE (decl
);
5235 if (type
== error_mark_node
)
5238 if (TYPE_NEEDS_CONSTRUCTING (type
)
5239 || (CLASS_TYPE_P (type
)
5240 && !BRACE_ENCLOSED_INITIALIZER_P (init
)))
5241 return build_aggr_init_full_exprs (decl
, init
, flags
);
5242 else if (TREE_CODE (init
) != TREE_VEC
)
5244 init_code
= store_init_value (decl
, init
, flags
);
5245 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5246 && DECL_INITIAL (decl
)
5247 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5248 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5249 warning (0, "array %qD initialized by parenthesized string literal %qE",
5250 decl
, DECL_INITIAL (decl
));
5254 else if (DECL_EXTERNAL (decl
))
5256 else if (TYPE_P (type
) && TYPE_NEEDS_CONSTRUCTING (type
))
5257 return build_aggr_init_full_exprs (decl
, init
, flags
);
5258 else if (MAYBE_CLASS_TYPE_P (type
))
5260 tree core_type
= strip_array_types (type
);
5262 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
))
5263 error ("structure %qD with uninitialized const members", decl
);
5264 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
))
5265 error ("structure %qD with uninitialized reference members", decl
);
5267 check_for_uninitialized_const_var (decl
);
5270 check_for_uninitialized_const_var (decl
);
5272 if (init
&& init
!= error_mark_node
)
5273 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5278 /* If DECL is not a local variable, give it RTL. */
5281 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5283 int toplev
= toplevel_bindings_p ();
5285 const char *filename
;
5287 /* Set the DECL_ASSEMBLER_NAME for the object. */
5290 /* The `register' keyword, when used together with an
5291 asm-specification, indicates that the variable should be
5292 placed in a particular register. */
5293 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5295 set_user_assembler_name (decl
, asmspec
);
5296 DECL_HARD_REGISTER (decl
) = 1;
5300 if (TREE_CODE (decl
) == FUNCTION_DECL
5301 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5302 set_builtin_user_assembler_name (decl
, asmspec
);
5303 set_user_assembler_name (decl
, asmspec
);
5307 /* Handle non-variables up front. */
5308 if (TREE_CODE (decl
) != VAR_DECL
)
5310 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5314 /* If we see a class member here, it should be a static data
5316 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5318 gcc_assert (TREE_STATIC (decl
));
5319 /* An in-class declaration of a static data member should be
5320 external; it is only a declaration, and not a definition. */
5321 if (init
== NULL_TREE
)
5322 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5325 /* We don't create any RTL for local variables. */
5326 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5329 /* We defer emission of local statics until the corresponding
5330 DECL_EXPR is expanded. */
5331 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5333 /* We try to defer namespace-scope static constants so that they are
5334 not emitted into the object file unnecessarily. */
5335 filename
= input_filename
;
5336 if (!DECL_VIRTUAL_P (decl
)
5337 && TREE_READONLY (decl
)
5338 && DECL_INITIAL (decl
) != NULL_TREE
5339 && DECL_INITIAL (decl
) != error_mark_node
5341 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5343 && !TREE_PUBLIC (decl
))
5345 /* Fool with the linkage of static consts according to #pragma
5347 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5348 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5350 TREE_PUBLIC (decl
) = 1;
5351 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5356 /* Likewise for template instantiations. */
5357 else if (DECL_LANG_SPECIFIC (decl
)
5358 && DECL_IMPLICIT_INSTANTIATION (decl
))
5361 /* If we're not deferring, go ahead and assemble the variable. */
5363 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5366 /* walk_tree helper for wrap_temporary_cleanups, below. */
5369 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5371 if (TYPE_P (*stmt_p
))
5377 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5379 tree guard
= (tree
)data
;
5380 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5382 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5383 /* Tell honor_protect_cleanup_actions to handle this as a separate
5385 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5387 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5393 /* We're initializing a local variable which has a cleanup GUARD. If there
5394 are any temporaries used in the initializer INIT of this variable, we
5395 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5396 variable will be cleaned up properly if one of them throws.
5398 Unfortunately, there's no way to express this properly in terms of
5399 nesting, as the regions for the temporaries overlap the region for the
5400 variable itself; if there are two temporaries, the variable needs to be
5401 the first thing destroyed if either of them throws. However, we only
5402 want to run the variable's cleanup if it actually got constructed. So
5403 we need to guard the temporary cleanups with the variable's cleanup if
5404 they are run on the normal path, but not if they are run on the
5405 exceptional path. We implement this by telling
5406 honor_protect_cleanup_actions to strip the variable cleanup from the
5407 exceptional path. */
5410 wrap_temporary_cleanups (tree init
, tree guard
)
5412 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5415 /* Generate code to initialize DECL (a local variable). */
5418 initialize_local_var (tree decl
, tree init
)
5420 tree type
= TREE_TYPE (decl
);
5424 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5425 || TREE_CODE (decl
) == RESULT_DECL
);
5426 gcc_assert (!TREE_STATIC (decl
));
5428 if (DECL_SIZE (decl
) == NULL_TREE
)
5430 /* If we used it already as memory, it must stay in memory. */
5431 DECL_INITIAL (decl
) = NULL_TREE
;
5432 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5436 if (type
== error_mark_node
)
5439 /* Compute and store the initial value. */
5440 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5442 /* Generate a cleanup, if necessary. */
5443 cleanup
= cxx_maybe_build_cleanup (decl
);
5445 /* Perform the initialization. */
5448 int saved_stmts_are_full_exprs_p
;
5450 /* If we're only initializing a single object, guard the destructors
5451 of any temporaries used in its initializer with its destructor.
5452 This isn't right for arrays because each element initialization is
5453 a full-expression. */
5454 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5455 wrap_temporary_cleanups (init
, cleanup
);
5457 gcc_assert (building_stmt_tree ());
5458 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5459 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5460 finish_expr_stmt (init
);
5461 current_stmt_tree ()->stmts_are_full_exprs_p
=
5462 saved_stmts_are_full_exprs_p
;
5465 /* Set this to 0 so we can tell whether an aggregate which was
5466 initialized was ever used. Don't do this if it has a
5467 destructor, so we don't complain about the 'resource
5468 allocation is initialization' idiom. Now set
5469 attribute((unused)) on types so decls of that type will be
5470 marked used. (see TREE_USED, above.) */
5471 if (TYPE_NEEDS_CONSTRUCTING (type
)
5473 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5474 && DECL_NAME (decl
))
5475 TREE_USED (decl
) = 0;
5476 else if (already_used
)
5477 TREE_USED (decl
) = 1;
5480 finish_decl_cleanup (decl
, cleanup
);
5483 /* DECL is a VAR_DECL for a compiler-generated variable with static
5484 storage duration (like a virtual table) whose initializer is a
5485 compile-time constant. INIT must be either a TREE_LIST of values,
5486 or a CONSTRUCTOR. Initialize the variable and provide it to the
5490 initialize_artificial_var (tree decl
, tree init
)
5492 gcc_assert (DECL_ARTIFICIAL (decl
));
5493 if (TREE_CODE (init
) == TREE_LIST
)
5494 init
= build_constructor_from_list (TREE_TYPE (decl
), init
);
5495 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5496 DECL_INITIAL (decl
) = init
;
5497 DECL_INITIALIZED_P (decl
) = 1;
5498 determine_visibility (decl
);
5499 layout_var_decl (decl
);
5500 maybe_commonize_var (decl
);
5501 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5504 /* INIT is the initializer for a variable, as represented by the
5505 parser. Returns true iff INIT is value-dependent. */
5508 value_dependent_init_p (tree init
)
5510 if (TREE_CODE (init
) == TREE_LIST
)
5511 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5512 return any_value_dependent_elements_p (init
);
5513 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5514 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5516 VEC(constructor_elt
, gc
) *elts
;
5520 elts
= CONSTRUCTOR_ELTS (init
);
5521 nelts
= VEC_length (constructor_elt
, elts
);
5522 for (i
= 0; i
< nelts
; ++i
)
5523 if (value_dependent_init_p (VEC_index (constructor_elt
,
5528 /* It must be a simple expression, e.g., int i = 3; */
5529 return value_dependent_expression_p (init
);
5534 /* Finish processing of a declaration;
5535 install its line number and initial value.
5536 If the length of an array type is not known before,
5537 it must be determined now, from the initial value, or it is an error.
5539 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5540 true, then INIT is an integral constant expression.
5542 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5543 if the (init) syntax was used. */
5546 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5547 tree asmspec_tree
, int flags
)
5551 const char *asmspec
= NULL
;
5552 int was_readonly
= 0;
5553 bool var_definition_p
= false;
5554 int saved_processing_template_decl
;
5557 if (decl
== error_mark_node
)
5562 error ("assignment (not initialization) in declaration");
5566 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5567 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5568 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
5570 type
= TREE_TYPE (decl
);
5571 if (type
== error_mark_node
)
5574 /* Assume no cleanup is required. */
5575 cleanup
= NULL_TREE
;
5576 saved_processing_template_decl
= processing_template_decl
;
5578 /* If a name was specified, get the string. */
5579 if (global_scope_p (current_binding_level
))
5580 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
5581 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
5582 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
5584 if (current_class_type
5585 && CP_DECL_CONTEXT (decl
) == current_class_type
5586 && TYPE_BEING_DEFINED (current_class_type
)
5587 && (DECL_INITIAL (decl
) || init
))
5588 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
5590 auto_node
= type_uses_auto (type
);
5593 if (init
== NULL_TREE
)
5595 error ("declaration of %q#D has no initializer", decl
);
5596 TREE_TYPE (decl
) = error_mark_node
;
5599 if (TREE_CODE (init
) == TREE_LIST
)
5600 init
= build_x_compound_expr_from_list (init
, "initializer");
5601 if (describable_type (init
))
5603 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, init
, auto_node
);
5604 if (type
== error_mark_node
)
5609 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
5612 if (init
== ridpointers
[(int)RID_DELETE
])
5614 /* FIXME check this is 1st decl. */
5615 DECL_DELETED_FN (decl
) = 1;
5616 DECL_DECLARED_INLINE_P (decl
) = 1;
5617 DECL_INITIAL (decl
) = error_mark_node
;
5618 FOR_EACH_CLONE (clone
, decl
)
5620 DECL_DELETED_FN (clone
) = 1;
5621 DECL_DECLARED_INLINE_P (clone
) = 1;
5622 DECL_INITIAL (clone
) = error_mark_node
;
5626 else if (init
== ridpointers
[(int)RID_DEFAULT
])
5628 if (defaultable_fn_check (decl
))
5629 DECL_DEFAULTED_FN (decl
) = 1;
5631 DECL_INITIAL (decl
) = NULL_TREE
;
5635 if (processing_template_decl
)
5637 bool type_dependent_p
;
5639 /* Add this declaration to the statement-tree. */
5640 if (at_function_scope_p ())
5641 add_decl_expr (decl
);
5643 type_dependent_p
= dependent_type_p (type
);
5645 if (check_for_bare_parameter_packs (init
))
5648 DECL_INITIAL (decl
) = NULL_TREE
;
5651 if (init
&& init_const_expr_p
&& TREE_CODE (decl
) == VAR_DECL
)
5653 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
5654 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl
))
5655 TREE_CONSTANT (decl
) = 1;
5658 /* Generally, initializers in templates are expanded when the
5659 template is instantiated. But, if DECL is an integral
5660 constant static data member, then it can be used in future
5661 integral constant expressions, and its value must be
5664 && DECL_CLASS_SCOPE_P (decl
)
5665 && DECL_INTEGRAL_CONSTANT_VAR_P (decl
)
5666 && !type_dependent_p
5667 && !value_dependent_init_p (init
)))
5670 DECL_INITIAL (decl
) = init
;
5671 if (TREE_CODE (decl
) == VAR_DECL
5672 && !DECL_PRETTY_FUNCTION_P (decl
)
5673 && !type_dependent_p
)
5674 maybe_deduce_size_from_array_init (decl
, init
);
5678 if (TREE_CODE (init
) == TREE_LIST
)
5680 /* If the parenthesized-initializer form was used (e.g.,
5681 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5682 arguments. (There is generally only one.) We convert them
5685 for (; list
; list
= TREE_CHAIN (list
))
5687 tree elt
= TREE_VALUE (list
);
5688 TREE_VALUE (list
) = fold_non_dependent_expr (elt
);
5692 init
= fold_non_dependent_expr (init
);
5693 processing_template_decl
= 0;
5696 /* Take care of TYPE_DECLs up front. */
5697 if (TREE_CODE (decl
) == TYPE_DECL
)
5699 if (type
!= error_mark_node
5700 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
5702 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
5703 warning (0, "shadowing previous type declaration of %q#D", decl
);
5704 set_identifier_type_value (DECL_NAME (decl
), decl
);
5707 /* If we have installed this as the canonical typedef for this
5708 type, and that type has not been defined yet, delay emitting
5709 the debug information for it, as we will emit it later. */
5710 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
5711 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
5712 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
5714 rest_of_decl_compilation (decl
, DECL_CONTEXT (decl
) == NULL_TREE
,
5719 /* A reference will be modified here, as it is initialized. */
5720 if (! DECL_EXTERNAL (decl
)
5721 && TREE_READONLY (decl
)
5722 && TREE_CODE (type
) == REFERENCE_TYPE
)
5725 TREE_READONLY (decl
) = 0;
5728 if (TREE_CODE (decl
) == VAR_DECL
)
5730 /* Only variables with trivial initialization and destruction can
5731 have thread-local storage. */
5732 if (DECL_THREAD_LOCAL_P (decl
)
5733 && (type_has_nontrivial_default_init (TREE_TYPE (decl
))
5734 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
5735 error ("%qD cannot be thread-local because it has non-trivial "
5736 "type %qT", decl
, TREE_TYPE (decl
));
5737 /* If this is a local variable that will need a mangled name,
5738 register it now. We must do this before processing the
5739 initializer for the variable, since the initialization might
5740 require a guard variable, and since the mangled name of the
5741 guard variable will depend on the mangled name of this
5743 if (DECL_FUNCTION_SCOPE_P (decl
)
5744 && TREE_STATIC (decl
)
5745 && !DECL_ARTIFICIAL (decl
))
5746 push_local_name (decl
);
5747 /* Convert the initializer to the type of DECL, if we have not
5748 already initialized DECL. */
5749 if (!DECL_INITIALIZED_P (decl
)
5750 /* If !DECL_EXTERNAL then DECL is being defined. In the
5751 case of a static data member initialized inside the
5752 class-specifier, there can be an initializer even if DECL
5753 is *not* defined. */
5754 && (!DECL_EXTERNAL (decl
) || init
))
5756 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
5759 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5760 /* Allow libjava/prims.cc define primitive classes. */
5761 if (init
!= NULL_TREE
5762 || jclass
== NULL_TREE
5763 || TREE_CODE (jclass
) != TYPE_DECL
5764 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
5765 || !same_type_ignoring_top_level_qualifiers_p
5766 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
5767 error ("Java object %qD not allocated with %<new%>", decl
);
5772 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
5773 if (init_const_expr_p
)
5775 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
5776 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl
))
5777 TREE_CONSTANT (decl
) = 1;
5780 init
= check_initializer (decl
, init
, flags
, &cleanup
);
5781 /* Thread-local storage cannot be dynamically initialized. */
5782 if (DECL_THREAD_LOCAL_P (decl
) && init
)
5784 error ("%qD is thread-local and so cannot be dynamically "
5785 "initialized", decl
);
5789 /* Check that the initializer for a static data member was a
5790 constant. Although we check in the parser that the
5791 initializer is an integral constant expression, we do not
5792 simplify division-by-zero at the point at which it
5793 occurs. Therefore, in:
5795 struct S { static const int i = 7 / 0; };
5797 we issue an error at this point. It would
5798 probably be better to forbid division by zero in
5799 integral constant expressions. */
5800 if (DECL_EXTERNAL (decl
) && init
)
5802 error ("%qD cannot be initialized by a non-constant expression"
5803 " when being declared", decl
);
5804 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
5812 The memory occupied by any object of static storage
5813 duration is zero-initialized at program startup before
5814 any other initialization takes place.
5816 We cannot create an appropriate initializer until after
5817 the type of DECL is finalized. If DECL_INITIAL is set,
5818 then the DECL is statically initialized, and any
5819 necessary zero-initialization has already been performed. */
5820 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
5821 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
5822 /*nelts=*/NULL_TREE
,
5823 /*static_storage_p=*/true);
5824 /* Remember that the initialization for this variable has
5826 DECL_INITIALIZED_P (decl
) = 1;
5827 /* This declaration is the definition of this variable,
5828 unless we are initializing a static data member within
5829 the class specifier. */
5830 if (!DECL_EXTERNAL (decl
))
5831 var_definition_p
= true;
5833 /* If the variable has an array type, lay out the type, even if
5834 there is no initializer. It is valid to index through the
5835 array, and we must get TYPE_ALIGN set correctly on the array
5837 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5840 if (!processing_template_decl
5841 && TREE_STATIC (decl
)
5842 && !at_function_scope_p ()
5843 && current_function_decl
== NULL
)
5844 /* So decl is a global variable or a static member of a
5845 non local class. Record the types it uses
5846 so that we can decide later to emit debug info for them. */
5847 record_types_used_by_current_var_decl (decl
);
5849 else if (TREE_CODE (decl
) == FIELD_DECL
5850 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
5851 error ("non-static data member %qD has Java class type", decl
);
5853 /* Add this declaration to the statement-tree. This needs to happen
5854 after the call to check_initializer so that the DECL_EXPR for a
5855 reference temp is added before the DECL_EXPR for the reference itself. */
5856 if (at_function_scope_p ())
5857 add_decl_expr (decl
);
5859 /* Let the middle end know about variables and functions -- but not
5860 static data members in uninstantiated class templates. */
5861 if (!saved_processing_template_decl
5862 && (TREE_CODE (decl
) == VAR_DECL
5863 || TREE_CODE (decl
) == FUNCTION_DECL
))
5865 if (TREE_CODE (decl
) == VAR_DECL
)
5867 layout_var_decl (decl
);
5868 maybe_commonize_var (decl
);
5871 /* This needs to happen after the linkage is set. */
5872 determine_visibility (decl
);
5874 if (var_definition_p
&& TREE_STATIC (decl
))
5876 /* If a TREE_READONLY variable needs initialization
5877 at runtime, it is no longer readonly and we need to
5878 avoid MEM_READONLY_P being set on RTL created for it. */
5881 if (TREE_READONLY (decl
))
5882 TREE_READONLY (decl
) = 0;
5885 else if (was_readonly
)
5886 TREE_READONLY (decl
) = 1;
5889 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
5891 /* Check for abstractness of the type. Notice that there is no
5892 need to strip array types here since the check for those types
5893 is already done within create_array_type_for_decl. */
5894 if (TREE_CODE (type
) == FUNCTION_TYPE
5895 || TREE_CODE (type
) == METHOD_TYPE
)
5896 abstract_virtuals_error (decl
, TREE_TYPE (type
));
5898 abstract_virtuals_error (decl
, type
);
5900 if (TREE_TYPE (decl
) == error_mark_node
)
5901 /* No initialization required. */
5903 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
5907 if (init
== ridpointers
[(int)RID_DEFAULT
])
5909 /* An out-of-class default definition is defined at
5910 the point where it is explicitly defaulted. */
5911 if (DECL_INITIAL (decl
) == error_mark_node
)
5912 synthesize_method (decl
);
5915 error ("function %q#D is initialized like a variable", decl
);
5917 /* else no initialization required. */
5919 else if (DECL_EXTERNAL (decl
)
5920 && ! (DECL_LANG_SPECIFIC (decl
)
5921 && DECL_NOT_REALLY_EXTERN (decl
)))
5924 DECL_INITIAL (decl
) = init
;
5926 /* A variable definition. */
5927 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5928 /* Initialize the local variable. */
5929 initialize_local_var (decl
, init
);
5931 /* If a variable is defined, and then a subsequent
5932 definition with external linkage is encountered, we will
5933 get here twice for the same variable. We want to avoid
5934 calling expand_static_init more than once. For variables
5935 that are not static data members, we can call
5936 expand_static_init only when we actually process the
5937 initializer. It is not legal to redeclare a static data
5938 member, so this issue does not arise in that case. */
5939 else if (var_definition_p
&& TREE_STATIC (decl
))
5940 expand_static_init (decl
, init
);
5943 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5944 reference, insert it in the statement-tree now. */
5946 push_cleanup (decl
, cleanup
, false);
5949 processing_template_decl
= saved_processing_template_decl
;
5952 TREE_READONLY (decl
) = 1;
5954 /* If this was marked 'used', be sure it will be output. */
5955 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl
)))
5956 mark_decl_referenced (decl
);
5959 /* Returns a declaration for a VAR_DECL as if:
5961 extern "C" TYPE NAME;
5963 had been seen. Used to create compiler-generated global
5967 declare_global_var (tree name
, tree type
)
5971 push_to_top_level ();
5972 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
5973 TREE_PUBLIC (decl
) = 1;
5974 DECL_EXTERNAL (decl
) = 1;
5975 DECL_ARTIFICIAL (decl
) = 1;
5976 /* If the user has explicitly declared this variable (perhaps
5977 because the code we are compiling is part of a low-level runtime
5978 library), then it is possible that our declaration will be merged
5979 with theirs by pushdecl. */
5980 decl
= pushdecl (decl
);
5981 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
5982 pop_from_top_level ();
5987 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5988 if "__cxa_atexit" is not being used) corresponding to the function
5989 to be called when the program exits. */
5992 get_atexit_fn_ptr_type (void)
5997 if (!atexit_fn_ptr_type_node
)
5999 if (flag_use_cxa_atexit
6000 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6001 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6002 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
6004 /* The parameter to "atexit" is "void (*)(void)". */
6005 arg_types
= void_list_node
;
6007 fn_type
= build_function_type (void_type_node
, arg_types
);
6008 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6011 return atexit_fn_ptr_type_node
;
6014 /* Returns a pointer to the `atexit' function. Note that if
6015 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6016 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6019 get_atexit_node (void)
6026 bool use_aeabi_atexit
;
6031 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6033 /* The declaration for `__cxa_atexit' is:
6035 int __cxa_atexit (void (*)(void *), void *, void *)
6037 We build up the argument types and then then function type
6040 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6041 /* First, build the pointer-to-function type for the first
6043 fn_ptr_type
= get_atexit_fn_ptr_type ();
6044 /* Then, build the rest of the argument types. */
6045 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
6046 if (use_aeabi_atexit
)
6048 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
6049 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
6053 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
6054 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
6056 /* And the final __cxa_atexit type. */
6057 fn_type
= build_function_type (integer_type_node
, arg_types
);
6058 fn_ptr_type
= build_pointer_type (fn_type
);
6059 if (use_aeabi_atexit
)
6060 name
= "__aeabi_atexit";
6062 name
= "__cxa_atexit";
6066 /* The declaration for `atexit' is:
6068 int atexit (void (*)());
6070 We build up the argument types and then then function type
6072 fn_ptr_type
= get_atexit_fn_ptr_type ();
6073 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, void_list_node
);
6074 /* Build the final atexit type. */
6075 fn_type
= build_function_type (integer_type_node
, arg_types
);
6079 /* Now, build the function declaration. */
6080 push_lang_context (lang_name_c
);
6081 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6082 mark_used (atexit_fndecl
);
6083 pop_lang_context ();
6084 atexit_node
= decay_conversion (atexit_fndecl
);
6089 /* Returns the __dso_handle VAR_DECL. */
6092 get_dso_handle_node (void)
6094 if (dso_handle_node
)
6095 return dso_handle_node
;
6097 /* Declare the variable. */
6098 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6101 return dso_handle_node
;
6104 /* Begin a new function with internal linkage whose job will be simply
6105 to destroy some particular variable. */
6107 static GTY(()) int start_cleanup_cnt
;
6110 start_cleanup_fn (void)
6115 bool use_cxa_atexit
= flag_use_cxa_atexit
6116 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6118 push_to_top_level ();
6120 /* No need to mangle this. */
6121 push_lang_context (lang_name_c
);
6123 /* Build the name of the function. */
6124 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6125 /* Build the function declaration. */
6126 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6127 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6128 /* It's a function with internal linkage, generated by the
6130 TREE_PUBLIC (fndecl
) = 0;
6131 DECL_ARTIFICIAL (fndecl
) = 1;
6132 /* Make the function `inline' so that it is only emitted if it is
6133 actually needed. It is unlikely that it will be inlined, since
6134 it is only called via a function pointer, but we avoid unnecessary
6135 emissions this way. */
6136 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6137 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6138 /* Build the parameter. */
6143 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6144 DECL_CONTEXT (parmdecl
) = fndecl
;
6145 TREE_USED (parmdecl
) = 1;
6146 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6150 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6152 pop_lang_context ();
6154 return current_function_decl
;
6157 /* Finish the cleanup function begun by start_cleanup_fn. */
6160 end_cleanup_fn (void)
6162 expand_or_defer_fn (finish_function (0));
6164 pop_from_top_level ();
6167 /* Generate code to handle the destruction of DECL, an object with
6168 static storage duration. */
6171 register_dtor_fn (tree decl
)
6180 type
= TREE_TYPE (decl
);
6181 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6182 return void_zero_node
;
6184 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6185 a class object, we can just pass the destructor to
6186 "__cxa_atexit"; we don't have to build a temporary function to do
6188 use_dtor
= (flag_use_cxa_atexit
6189 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()
6190 && CLASS_TYPE_P (type
));
6195 /* Find the destructor. */
6196 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6197 gcc_assert (idx
>= 0);
6198 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
6199 /* Make sure it is accessible. */
6200 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
);
6204 /* Call build_cleanup before we enter the anonymous function so
6205 that any access checks will be done relative to the current
6206 scope, rather than the scope of the anonymous function. */
6207 build_cleanup (decl
);
6209 /* Now start the function. */
6210 cleanup
= start_cleanup_fn ();
6212 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6213 to the original function, rather than the anonymous one. That
6214 will make the back end think that nested functions are in use,
6215 which causes confusion. */
6216 push_deferring_access_checks (dk_no_check
);
6217 fcall
= build_cleanup (decl
);
6218 pop_deferring_access_checks ();
6220 /* Create the body of the anonymous function. */
6221 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6222 finish_expr_stmt (fcall
);
6223 finish_compound_stmt (compound_stmt
);
6227 /* Call atexit with the cleanup function. */
6228 mark_used (cleanup
);
6229 cleanup
= build_address (cleanup
);
6230 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6236 /* We must convert CLEANUP to the type that "__cxa_atexit"
6238 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6239 /* "__cxa_atexit" will pass the address of DECL to the
6240 cleanup function. */
6242 addr
= build_address (decl
);
6243 /* The declared type of the parameter to "__cxa_atexit" is
6244 "void *". For plain "T*", we could just let the
6245 machinery in cp_build_function_call convert it -- but if the
6246 type is "cv-qualified T *", then we need to convert it
6247 before passing it in, to avoid spurious errors. */
6248 addr
= build_nop (ptr_type_node
, addr
);
6251 /* Since the cleanup functions we build ignore the address
6252 they're given, there's no reason to pass the actual address
6253 in, and, in general, it's cheaper to pass NULL than any
6255 addr
= null_pointer_node
;
6256 args
= tree_cons (NULL_TREE
,
6257 cp_build_unary_op (ADDR_EXPR
, get_dso_handle_node (), 0,
6258 tf_warning_or_error
),
6260 if (targetm
.cxx
.use_aeabi_atexit ())
6262 args
= tree_cons (NULL_TREE
, cleanup
, args
);
6263 args
= tree_cons (NULL_TREE
, addr
, args
);
6267 args
= tree_cons (NULL_TREE
, addr
, args
);
6268 args
= tree_cons (NULL_TREE
, cleanup
, args
);
6272 args
= tree_cons (NULL_TREE
, cleanup
, NULL_TREE
);
6273 return cp_build_function_call (get_atexit_node (), args
,
6274 tf_warning_or_error
);
6277 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6278 is its initializer. Generate code to handle the construction
6279 and destruction of DECL. */
6282 expand_static_init (tree decl
, tree init
)
6284 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
6285 gcc_assert (TREE_STATIC (decl
));
6287 /* Some variables require no initialization. */
6289 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
6290 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6293 if (DECL_FUNCTION_SCOPE_P (decl
))
6295 /* Emit code to perform this initialization but once. */
6296 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6297 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6298 tree guard
, guard_addr
;
6299 tree acquire_fn
, release_fn
, abort_fn
;
6302 /* Emit code to perform this initialization but once. This code
6305 static <type> guard;
6306 if (!guard.first_byte) {
6307 if (__cxa_guard_acquire (&guard)) {
6310 // Do initialization.
6311 flag = true; __cxa_guard_release (&guard);
6312 // Register variable for destruction at end of program.
6314 if (!flag) __cxa_guard_abort (&guard);
6318 Note that the `flag' variable is only set to 1 *after* the
6319 initialization is complete. This ensures that an exception,
6320 thrown during the construction, will cause the variable to
6321 reinitialized when we pass through this code again, as per:
6325 If the initialization exits by throwing an exception, the
6326 initialization is not complete, so it will be tried again
6327 the next time control enters the declaration.
6329 This process should be thread-safe, too; multiple threads
6330 should not be able to initialize the variable more than
6333 /* Create the guard variable. */
6334 guard
= get_guard (decl
);
6336 /* This optimization isn't safe on targets with relaxed memory
6337 consistency. On such targets we force synchronization in
6338 __cxa_guard_acquire. */
6339 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6341 /* Begin the conditional initialization. */
6342 if_stmt
= begin_if_stmt ();
6343 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6344 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6347 if (flag_threadsafe_statics
)
6349 guard_addr
= build_address (guard
);
6351 acquire_fn
= get_identifier ("__cxa_guard_acquire");
6352 release_fn
= get_identifier ("__cxa_guard_release");
6353 abort_fn
= get_identifier ("__cxa_guard_abort");
6354 if (!get_global_value_if_present (acquire_fn
, &acquire_fn
))
6356 tree argtypes
= tree_cons (NULL_TREE
, TREE_TYPE (guard_addr
),
6358 tree vfntype
= build_function_type (void_type_node
, argtypes
);
6359 acquire_fn
= push_library_fn
6360 (acquire_fn
, build_function_type (integer_type_node
, argtypes
),
6362 release_fn
= push_library_fn (release_fn
, vfntype
, NULL_TREE
);
6363 abort_fn
= push_library_fn (abort_fn
, vfntype
, NULL_TREE
);
6367 release_fn
= identifier_global_value (release_fn
);
6368 abort_fn
= identifier_global_value (abort_fn
);
6371 inner_if_stmt
= begin_if_stmt ();
6372 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6375 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6376 begin
= get_target_expr (boolean_false_node
);
6377 flag
= TARGET_EXPR_SLOT (begin
);
6379 TARGET_EXPR_CLEANUP (begin
)
6380 = build3 (COND_EXPR
, void_type_node
, flag
,
6382 build_call_n (abort_fn
, 1, guard_addr
));
6383 CLEANUP_EH_ONLY (begin
) = 1;
6385 /* Do the initialization itself. */
6386 init
= add_stmt_to_compound (begin
, init
);
6387 init
= add_stmt_to_compound
6388 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
6389 init
= add_stmt_to_compound
6390 (init
, build_call_n (release_fn
, 1, guard_addr
));
6393 init
= add_stmt_to_compound (init
, set_guard (guard
));
6395 /* Use atexit to register a function for destroying this static
6397 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
6399 finish_expr_stmt (init
);
6401 if (flag_threadsafe_statics
)
6403 finish_compound_stmt (inner_then_clause
);
6404 finish_then_clause (inner_if_stmt
);
6405 finish_if_stmt (inner_if_stmt
);
6408 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6410 finish_compound_stmt (then_clause
);
6411 finish_then_clause (if_stmt
);
6412 finish_if_stmt (if_stmt
);
6416 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
6420 /* Make TYPE a complete type based on INITIAL_VALUE.
6421 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6422 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6423 3 if the initializer list is empty (in pedantic mode). */
6426 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
6429 tree type
, elt_type
;
6433 unsigned HOST_WIDE_INT i
;
6436 /* An array of character type can be initialized from a
6437 brace-enclosed string constant.
6439 FIXME: this code is duplicated from reshape_init. Probably
6440 we should just call reshape_init here? */
6441 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
6442 && TREE_CODE (initial_value
) == CONSTRUCTOR
6443 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
6445 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
6446 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
6448 if (TREE_CODE (value
) == STRING_CST
6449 && VEC_length (constructor_elt
, v
) == 1)
6450 initial_value
= value
;
6453 /* If any of the elements are parameter packs, we can't actually
6454 complete this type now because the array size is dependent. */
6455 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
6457 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
6460 if (PACK_EXPANSION_P (value
))
6466 failure
= complete_array_type (ptype
, initial_value
, do_default
);
6468 /* We can create the array before the element type is complete, which
6469 means that we didn't have these two bits set in the original type
6470 either. In completing the type, we are expected to propagate these
6471 bits. See also complete_type which does the same thing for arrays
6474 if (TYPE_DOMAIN (type
))
6476 elt_type
= TREE_TYPE (type
);
6477 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
6478 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
6479 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
6485 /* Return zero if something is declared to be a member of type
6486 CTYPE when in the context of CUR_TYPE. STRING is the error
6487 message to print in that case. Otherwise, quietly return 1. */
6490 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
6492 if (ctype
&& ctype
!= cur_type
)
6494 if (flags
== DTOR_FLAG
)
6495 error ("destructor for alien class %qT cannot be a member", ctype
);
6497 error ("constructor for alien class %qT cannot be a member", ctype
);
6503 /* Subroutine of `grokdeclarator'. */
6505 /* Generate errors possibly applicable for a given set of specifiers.
6506 This is for ARM $7.1.2. */
6509 bad_specifiers (tree object
,
6518 error ("%qD declared as a %<virtual%> %s", object
, type
);
6520 error ("%qD declared as an %<inline%> %s", object
, type
);
6522 error ("%<const%> and %<volatile%> function specifiers on "
6523 "%qD invalid in %s declaration",
6526 error ("%q+D declared as a friend", object
);
6528 && (TREE_CODE (object
) == TYPE_DECL
6529 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
6530 && !TYPE_REFFN_P (TREE_TYPE (object
))
6531 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
6532 error ("%q+D declared with an exception specification", object
);
6535 /* DECL is a member function or static data member and is presently
6536 being defined. Check that the definition is taking place in a
6540 check_class_member_definition_namespace (tree decl
)
6542 /* These checks only apply to member functions and static data
6544 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
6545 || TREE_CODE (decl
) == VAR_DECL
);
6546 /* We check for problems with specializations in pt.c in
6547 check_specialization_namespace, where we can issue better
6549 if (processing_specialization
)
6551 /* There are no restrictions on the placement of
6552 explicit instantiations. */
6553 if (processing_explicit_instantiation
)
6557 A member function definition that appears outside of the
6558 class definition shall appear in a namespace scope enclosing
6559 the class definition.
6563 The definition for a static data member shall appear in a
6564 namespace scope enclosing the member's class definition. */
6565 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
6566 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
6567 decl
, DECL_CONTEXT (decl
));
6570 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6571 METHOD_TYPE for a non-static member function; QUALS are the
6572 cv-qualifiers that apply to the function. */
6575 build_this_parm (tree type
, cp_cv_quals quals
)
6580 cp_cv_quals this_quals
;
6582 this_type
= TREE_VALUE (TYPE_ARG_TYPES (type
));
6583 /* The `this' parameter is implicitly `const'; it cannot be
6585 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
6586 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
6587 parm
= build_artificial_parm (this_identifier
, qual_type
);
6588 cp_apply_type_quals_to_decl (this_quals
, parm
);
6592 /* CTYPE is class type, or null if non-class.
6593 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6595 DECLARATOR is the function's name.
6596 PARMS is a chain of PARM_DECLs for the function.
6597 VIRTUALP is truthvalue of whether the function is virtual or not.
6598 FLAGS are to be passed through to `grokclassfn'.
6599 QUALS are qualifiers indicating whether the function is `const'
6601 RAISES is a list of exceptions that this function can raise.
6602 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6603 not look, and -1 if we should not call `grokclassfn' at all.
6605 SFK is the kind of special function (if any) for the new function.
6607 Returns `NULL_TREE' if something goes wrong, after issuing
6608 applicable error messages. */
6611 grokfndecl (tree ctype
,
6615 tree orig_declarator
,
6617 enum overload_flags flags
,
6624 special_function_kind sfk
,
6629 location_t location
)
6632 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
6636 type
= build_exception_variant (type
, raises
);
6638 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
6640 /* If we have an explicit location, use it, otherwise use whatever
6641 build_lang_decl used (probably input_location). */
6642 if (location
!= UNKNOWN_LOCATION
)
6643 DECL_SOURCE_LOCATION (decl
) = location
;
6645 if (TREE_CODE (type
) == METHOD_TYPE
)
6648 parm
= build_this_parm (type
, quals
);
6649 TREE_CHAIN (parm
) = parms
;
6652 DECL_ARGUMENTS (decl
) = parms
;
6653 for (t
= parms
; t
; t
= TREE_CHAIN (t
))
6654 DECL_CONTEXT (t
) = decl
;
6655 /* Propagate volatile out from type to decl. */
6656 if (TYPE_VOLATILE (type
))
6657 TREE_THIS_VOLATILE (decl
) = 1;
6659 /* Setup decl according to sfk. */
6662 case sfk_constructor
:
6663 case sfk_copy_constructor
:
6664 case sfk_move_constructor
:
6665 DECL_CONSTRUCTOR_P (decl
) = 1;
6667 case sfk_destructor
:
6668 DECL_DESTRUCTOR_P (decl
) = 1;
6674 /* If pointers to member functions use the least significant bit to
6675 indicate whether a function is virtual, ensure a pointer
6676 to this function will have that bit clear. */
6677 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
6678 && TREE_CODE (type
) == METHOD_TYPE
6679 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
6680 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
6683 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
6687 ("defining explicit specialization %qD in friend declaration",
6691 tree fns
= TREE_OPERAND (orig_declarator
, 0);
6692 tree args
= TREE_OPERAND (orig_declarator
, 1);
6694 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6696 /* Something like `template <class T> friend void f<T>()'. */
6697 error ("invalid use of template-id %qD in declaration "
6698 "of primary template",
6704 /* A friend declaration of the form friend void f<>(). Record
6705 the information in the TEMPLATE_ID_EXPR. */
6706 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
6708 if (TREE_CODE (fns
) == COMPONENT_REF
)
6710 /* Due to bison parser ickiness, we will have already looked
6711 up an operator_name or PFUNCNAME within the current class
6712 (see template_id in parse.y). If the current class contains
6713 such a name, we'll get a COMPONENT_REF here. Undo that. */
6715 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
6716 == current_class_type
);
6717 fns
= TREE_OPERAND (fns
, 1);
6719 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
6720 || TREE_CODE (fns
) == OVERLOAD
);
6721 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
6723 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
6724 if (TREE_PURPOSE (t
)
6725 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
6727 error ("default arguments are not allowed in declaration "
6728 "of friend template specialization %qD",
6735 error ("%<inline%> is not allowed in declaration of friend "
6736 "template specialization %qD",
6743 /* If this decl has namespace scope, set that up. */
6745 set_decl_namespace (decl
, in_namespace
, friendp
);
6747 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
6749 /* `main' and builtins have implicit 'C' linkage. */
6750 if ((MAIN_NAME_P (declarator
)
6751 || (IDENTIFIER_LENGTH (declarator
) > 10
6752 && IDENTIFIER_POINTER (declarator
)[0] == '_'
6753 && IDENTIFIER_POINTER (declarator
)[1] == '_'
6754 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
6755 && current_lang_name
== lang_name_cplusplus
6756 && ctype
== NULL_TREE
6757 /* NULL_TREE means global namespace. */
6758 && DECL_CONTEXT (decl
) == NULL_TREE
)
6759 SET_DECL_LANGUAGE (decl
, lang_c
);
6761 /* Should probably propagate const out from type to decl I bet (mrs). */
6764 DECL_STATIC_FUNCTION_P (decl
) = 1;
6765 DECL_CONTEXT (decl
) = ctype
;
6770 DECL_CONTEXT (decl
) = ctype
;
6772 check_class_member_definition_namespace (decl
);
6775 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
6777 if (processing_template_decl
)
6778 error ("cannot declare %<::main%> to be a template");
6780 error ("cannot declare %<::main%> to be inline");
6782 error ("cannot declare %<::main%> to be static");
6787 /* Members of anonymous types and local classes have no linkage; make
6788 them internal. If a typedef is made later, this will be changed. */
6789 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
6790 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
6793 if (publicp
&& cxx_dialect
== cxx98
)
6795 /* [basic.link]: A name with no linkage (notably, the name of a class
6796 or enumeration declared in a local scope) shall not be used to
6797 declare an entity with linkage.
6799 DR 757 relaxes this restriction for C++0x. */
6800 t
= no_linkage_check (TREE_TYPE (decl
),
6801 /*relaxed_p=*/false);
6804 if (TYPE_ANONYMOUS_P (t
))
6806 if (DECL_EXTERN_C_P (decl
))
6807 /* Allow this; it's pretty common in C. */;
6810 permerror (input_location
, "non-local function %q#D uses anonymous type",
6812 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
6813 permerror (input_location
, "%q+#D does not refer to the unqualified "
6814 "type, so it is not used for linkage",
6819 permerror (input_location
, "non-local function %q#D uses local type %qT", decl
, t
);
6823 TREE_PUBLIC (decl
) = publicp
;
6826 DECL_INTERFACE_KNOWN (decl
) = 1;
6827 DECL_NOT_REALLY_EXTERN (decl
) = 1;
6830 /* If the declaration was declared inline, mark it as such. */
6832 DECL_DECLARED_INLINE_P (decl
) = 1;
6834 DECL_EXTERNAL (decl
) = 1;
6835 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
6838 ? G_("static member function %qD cannot have cv-qualifier")
6839 : G_("non-member function %qD cannot have cv-qualifier"),
6841 quals
= TYPE_UNQUALIFIED
;
6844 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
6845 && !grok_op_properties (decl
, /*complain=*/true))
6849 /* Make the init_value nonzero so pushdecl knows this is not
6850 tentative. error_mark_node is replaced later with the BLOCK. */
6851 DECL_INITIAL (decl
) = error_mark_node
;
6853 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
6854 TREE_NOTHROW (decl
) = 1;
6856 /* Caller will do the rest of this. */
6860 if (ctype
!= NULL_TREE
)
6861 grokclassfn (ctype
, decl
, flags
);
6863 decl
= check_explicit_specialization (orig_declarator
, decl
,
6866 4 * (friendp
!= 0));
6867 if (decl
== error_mark_node
)
6872 cplus_decl_attributes (&decl
, *attrlist
, 0);
6873 *attrlist
= NULL_TREE
;
6876 /* Check main's type after attributes have been applied. */
6877 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
6879 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
6882 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
6884 error ("%<::main%> must return %<int%>");
6885 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
6886 TREE_TYPE (decl
) = newtype
;
6889 check_main_parameter_types (decl
);
6892 if (ctype
!= NULL_TREE
6893 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
6896 tree old_decl
= check_classfn (ctype
, decl
,
6897 (processing_template_decl
6898 > template_class_depth (ctype
))
6899 ? current_template_parms
6902 if (old_decl
== error_mark_node
)
6910 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
6911 /* Because grokfndecl is always supposed to return a
6912 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6913 here. We depend on our callers to figure out that its
6914 really a template that's being returned. */
6915 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
6917 if (DECL_STATIC_FUNCTION_P (old_decl
)
6918 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
6919 /* Remove the `this' parm added by grokclassfn.
6920 XXX Isn't this done in start_function, too? */
6921 revert_static_member_fn (decl
);
6922 if (DECL_ARTIFICIAL (old_decl
))
6924 error ("definition of implicitly-declared %qD", old_decl
);
6928 /* Since we've smashed OLD_DECL to its
6929 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6930 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
6931 decl
= DECL_TEMPLATE_RESULT (decl
);
6933 /* Attempt to merge the declarations. This can fail, in
6934 the case of some invalid specialization declarations. */
6935 pushed_scope
= push_scope (ctype
);
6936 ok
= duplicate_decls (decl
, old_decl
, friendp
);
6938 pop_scope (pushed_scope
);
6941 error ("no %q#D member function declared in class %qT",
6949 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
6952 if (ctype
== NULL_TREE
|| check
)
6956 DECL_VIRTUAL_P (decl
) = 1;
6961 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6962 the linkage that DECL will receive in the object file. */
6965 set_linkage_for_static_data_member (tree decl
)
6967 /* A static data member always has static storage duration and
6968 external linkage. Note that static data members are forbidden in
6969 local classes -- the only situation in which a class has
6970 non-external linkage. */
6971 TREE_PUBLIC (decl
) = 1;
6972 TREE_STATIC (decl
) = 1;
6973 /* For non-template classes, static data members are always put
6974 out in exactly those files where they are defined, just as
6975 with ordinary namespace-scope variables. */
6976 if (!processing_template_decl
)
6977 DECL_INTERFACE_KNOWN (decl
) = 1;
6980 /* Create a VAR_DECL named NAME with the indicated TYPE.
6982 If SCOPE is non-NULL, it is the class type or namespace containing
6983 the variable. If SCOPE is NULL, the variable should is created in
6984 the innermost enclosings scope. */
6987 grokvardecl (tree type
,
6989 const cp_decl_specifier_seq
*declspecs
,
6995 tree explicit_scope
;
6997 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
6999 /* Compute the scope in which to place the variable, but remember
7000 whether or not that scope was explicitly specified by the user. */
7001 explicit_scope
= scope
;
7004 /* An explicit "extern" specifier indicates a namespace-scope
7006 if (declspecs
->storage_class
== sc_extern
)
7007 scope
= current_namespace
;
7008 else if (!at_function_scope_p ())
7009 scope
= current_scope ();
7013 && (/* If the variable is a namespace-scope variable declared in a
7014 template, we need DECL_LANG_SPECIFIC. */
7015 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7016 /* Similarly for namespace-scope variables with language linkage
7018 || (TREE_CODE (scope
) == NAMESPACE_DECL
7019 && current_lang_name
!= lang_name_cplusplus
)
7020 /* Similarly for static data members. */
7022 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7024 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7026 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7027 set_decl_namespace (decl
, explicit_scope
, 0);
7029 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7031 if (declspecs
->storage_class
== sc_extern
)
7033 DECL_THIS_EXTERN (decl
) = 1;
7034 DECL_EXTERNAL (decl
) = !initialized
;
7037 if (DECL_CLASS_SCOPE_P (decl
))
7039 set_linkage_for_static_data_member (decl
);
7040 /* This function is only called with out-of-class definitions. */
7041 DECL_EXTERNAL (decl
) = 0;
7042 check_class_member_definition_namespace (decl
);
7044 /* At top level, either `static' or no s.c. makes a definition
7045 (perhaps tentative), and absence of `static' makes it public. */
7046 else if (toplevel_bindings_p ())
7048 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7049 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7050 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7052 /* Not at top level, only `static' makes a static definition. */
7055 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7056 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7059 if (declspecs
->specs
[(int)ds_thread
])
7060 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7062 /* If the type of the decl has no linkage, make sure that we'll
7063 notice that in mark_used. */
7064 if (cxx_dialect
> cxx98
7065 && decl_linkage (decl
) != lk_none
7066 && DECL_LANG_SPECIFIC (decl
) == NULL
7067 && !DECL_EXTERN_C_P (decl
)
7068 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7069 retrofit_lang_decl (decl
);
7071 if (TREE_PUBLIC (decl
))
7073 /* [basic.link]: A name with no linkage (notably, the name of a class
7074 or enumeration declared in a local scope) shall not be used to
7075 declare an entity with linkage.
7077 DR 757 relaxes this restriction for C++0x. */
7078 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7079 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7082 if (TYPE_ANONYMOUS_P (t
))
7084 if (DECL_EXTERN_C_P (decl
))
7085 /* Allow this; it's pretty common in C. */
7089 /* DRs 132, 319 and 389 seem to indicate types with
7090 no linkage can only be used to declare extern "C"
7091 entities. Since it's not always an error in the
7092 ISO C++ 90 Standard, we only issue a warning. */
7093 warning (0, "non-local variable %q#D uses anonymous type",
7095 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7096 warning (0, "%q+#D does not refer to the unqualified "
7097 "type, so it is not used for linkage",
7102 warning (0, "non-local variable %q#D uses local type %qT", decl
, t
);
7106 DECL_INTERFACE_KNOWN (decl
) = 1;
7111 /* Create and return a canonical pointer to member function type, for
7112 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7115 build_ptrmemfunc_type (tree type
)
7119 tree unqualified_variant
= NULL_TREE
;
7121 if (type
== error_mark_node
)
7124 /* If a canonical type already exists for this type, use it. We use
7125 this method instead of type_hash_canon, because it only does a
7126 simple equality check on the list of field members. */
7128 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7131 /* Make sure that we always have the unqualified pointer-to-member
7133 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7135 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7137 t
= make_class_type (RECORD_TYPE
);
7138 xref_basetypes (t
, NULL_TREE
);
7140 /* Let the front end know this is a pointer to member function... */
7141 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7142 /* ... and not really a class type. */
7143 SET_CLASS_TYPE_P (t
, 0);
7145 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7148 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7150 TREE_CHAIN (field
) = fields
;
7153 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7155 /* Zap out the name so that the back end will give us the debugging
7156 information for this anonymous RECORD_TYPE. */
7157 TYPE_NAME (t
) = NULL_TREE
;
7159 /* If this is not the unqualified form of this pointer-to-member
7160 type, set the TYPE_MAIN_VARIANT for this type to be the
7161 unqualified type. Since they are actually RECORD_TYPEs that are
7162 not variants of each other, we must do this manually.
7163 As we just built a new type there is no need to do yet another copy. */
7164 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7166 int type_quals
= cp_type_quals (type
);
7167 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7168 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7169 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7170 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7171 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7172 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7173 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7176 /* Cache this pointer-to-member type so that we can find it again
7178 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7180 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7181 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7182 else if (TYPE_CANONICAL (type
) != type
)
7183 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
7188 /* Create and return a pointer to data member type. */
7191 build_ptrmem_type (tree class_type
, tree member_type
)
7193 if (TREE_CODE (member_type
) == METHOD_TYPE
)
7195 tree arg_types
= TYPE_ARG_TYPES (member_type
);
7196 cp_cv_quals quals
= cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types
)));
7197 member_type
= build_memfn_type (member_type
, class_type
, quals
);
7198 return build_ptrmemfunc_type (build_pointer_type (member_type
));
7202 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
7203 return build_offset_type (class_type
, member_type
);
7207 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7208 Check to see that the definition is valid. Issue appropriate error
7209 messages. Return 1 if the definition is particularly bad, or 0
7213 check_static_variable_definition (tree decl
, tree type
)
7215 /* Motion 10 at San Diego: If a static const integral data member is
7216 initialized with an integral constant expression, the initializer
7217 may appear either in the declaration (within the class), or in
7218 the definition, but not both. If it appears in the class, the
7219 member is a member constant. The file-scope definition is always
7221 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
7223 error ("invalid in-class initialization of static data member "
7224 "of non-integral type %qT",
7226 /* If we just return the declaration, crashes will sometimes
7227 occur. We therefore return void_type_node, as if this were a
7228 friend declaration, to cause callers to completely ignore
7229 this declaration. */
7232 else if (!CP_TYPE_CONST_P (type
))
7233 error ("ISO C++ forbids in-class initialization of non-const "
7234 "static member %qD",
7236 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7237 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids initialization of member constant "
7238 "%qD of non-integral type %qT", decl
, type
);
7243 /* Given the SIZE (i.e., number of elements) in an array, compute an
7244 appropriate index type for the array. If non-NULL, NAME is the
7245 name of the thing being declared. */
7248 compute_array_index_type (tree name
, tree size
)
7252 tree abi_1_itype
= NULL_TREE
;
7254 if (error_operand_p (size
))
7255 return error_mark_node
;
7257 type
= TREE_TYPE (size
);
7258 /* The array bound must be an integer type. */
7259 if (!dependent_type_p (type
) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
7262 error ("size of array %qD has non-integral type %qT", name
, type
);
7264 error ("size of array has non-integral type %qT", type
);
7265 size
= integer_one_node
;
7266 type
= TREE_TYPE (size
);
7269 /* We can only call value_dependent_expression_p on integral constant
7270 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7271 set if this isn't one. */
7272 if (processing_template_decl
7273 && (TREE_SIDE_EFFECTS (size
) || value_dependent_expression_p (size
)))
7275 /* We cannot do any checking for a SIZE that isn't known to be
7276 constant. Just build the index type and mark that it requires
7277 structural equality checks. */
7278 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7279 size
, integer_one_node
));
7280 if (!TREE_SIDE_EFFECTS (size
))
7282 TYPE_DEPENDENT_P (itype
) = 1;
7283 TYPE_DEPENDENT_P_VALID (itype
) = 1;
7285 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
7289 if (!abi_version_at_least (2) && processing_template_decl
)
7290 /* For abi-1, we handled all instances in templates the same way,
7291 even when they were non-dependent. This affects the manglings
7292 produced. So, we do the normal checking for non-dependent
7293 sizes, but at the end we'll return the same type that abi-1
7294 would have, but with TYPE_CANONICAL set to the "right"
7295 value that the current ABI would provide. */
7296 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7297 size
, integer_one_node
));
7299 /* The size might be the result of a cast. */
7300 STRIP_TYPE_NOPS (size
);
7302 /* It might be a const variable or enumeration constant. */
7303 size
= integral_constant_value (size
);
7305 /* Normally, the array-bound will be a constant. */
7306 if (TREE_CODE (size
) == INTEGER_CST
)
7308 /* Check to see if the array bound overflowed. Make that an
7309 error, no matter how generous we're being. */
7310 constant_expression_error (size
);
7312 /* An array must have a positive number of elements. */
7313 if (INT_CST_LT (size
, integer_zero_node
))
7316 error ("size of array %qD is negative", name
);
7318 error ("size of array is negative");
7319 size
= integer_one_node
;
7321 /* As an extension we allow zero-sized arrays. We always allow
7322 them in system headers because glibc uses them. */
7323 else if (integer_zerop (size
) && !in_system_header
)
7326 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array %qD", name
);
7328 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array");
7331 else if (TREE_CONSTANT (size
))
7333 /* `(int) &fn' is not a valid array bound. */
7335 error ("size of array %qD is not an integral constant-expression",
7338 error ("size of array is not an integral constant-expression");
7339 size
= integer_one_node
;
7341 else if (pedantic
&& warn_vla
!= 0)
7344 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
7346 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
7348 else if (warn_vla
> 0)
7352 "variable length array %qD is used", name
);
7355 "variable length array is used");
7358 if (processing_template_decl
&& !TREE_CONSTANT (size
))
7359 /* A variable sized array. */
7360 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
7363 HOST_WIDE_INT saved_processing_template_decl
;
7365 /* Compute the index of the largest element in the array. It is
7366 one less than the number of elements in the array. We save
7367 and restore PROCESSING_TEMPLATE_DECL so that computations in
7368 cp_build_binary_op will be appropriately folded. */
7369 saved_processing_template_decl
= processing_template_decl
;
7370 processing_template_decl
= 0;
7371 itype
= cp_build_binary_op (input_location
,
7373 cp_convert (ssizetype
, size
),
7374 cp_convert (ssizetype
, integer_one_node
),
7375 tf_warning_or_error
);
7376 itype
= fold (itype
);
7377 processing_template_decl
= saved_processing_template_decl
;
7379 if (!TREE_CONSTANT (itype
))
7380 /* A variable sized array. */
7381 itype
= variable_size (itype
);
7382 /* Make sure that there was no overflow when creating to a signed
7383 index type. (For example, on a 32-bit machine, an array with
7384 size 2^32 - 1 is too big.) */
7385 else if (TREE_CODE (itype
) == INTEGER_CST
7386 && TREE_OVERFLOW (itype
))
7388 error ("overflow in array dimension");
7389 TREE_OVERFLOW (itype
) = 0;
7393 /* Create and return the appropriate index type. */
7396 tree t
= build_index_type (itype
);
7397 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
7401 return build_index_type (itype
);
7404 /* Returns the scope (if any) in which the entity declared by
7405 DECLARATOR will be located. If the entity was declared with an
7406 unqualified name, NULL_TREE is returned. */
7409 get_scope_of_declarator (const cp_declarator
*declarator
)
7411 while (declarator
&& declarator
->kind
!= cdk_id
)
7412 declarator
= declarator
->declarator
;
7414 /* If the declarator-id is a SCOPE_REF, the scope in which the
7415 declaration occurs is the first operand. */
7417 && declarator
->u
.id
.qualifying_scope
)
7418 return declarator
->u
.id
.qualifying_scope
;
7420 /* Otherwise, the declarator is not a qualified name; the entity will
7421 be declared in the current scope. */
7425 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7426 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7430 create_array_type_for_decl (tree name
, tree type
, tree size
)
7432 tree itype
= NULL_TREE
;
7433 const char* error_msg
;
7435 /* If things have already gone awry, bail now. */
7436 if (type
== error_mark_node
|| size
== error_mark_node
)
7437 return error_mark_node
;
7439 /* Assume that everything will go OK. */
7442 /* There are some types which cannot be array elements. */
7443 switch (TREE_CODE (type
))
7446 error_msg
= "array of void";
7450 error_msg
= "array of functions";
7453 case REFERENCE_TYPE
:
7454 error_msg
= "array of references";
7458 error_msg
= "array of function members";
7465 /* If something went wrong, issue an error-message and return. */
7469 error ("declaration of %qD as %s", name
, error_msg
);
7471 error ("creating %s", error_msg
);
7473 return error_mark_node
;
7478 The constant expressions that specify the bounds of the arrays
7479 can be omitted only for the first member of the sequence. */
7480 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
7483 error ("declaration of %qD as multidimensional array must "
7484 "have bounds for all dimensions except the first",
7487 error ("multidimensional array must have bounds for all "
7488 "dimensions except the first");
7490 return error_mark_node
;
7493 /* Figure out the index type for the array. */
7495 itype
= compute_array_index_type (name
, size
);
7498 T is called the array element type; this type shall not be [...] an
7499 abstract class type. */
7500 abstract_virtuals_error (name
, type
);
7502 return build_cplus_array_type (type
, itype
);
7505 /* Check that it's OK to declare a function with the indicated TYPE.
7506 SFK indicates the kind of special function (if any) that this
7507 function is. OPTYPE is the type given in a conversion operator
7508 declaration, or the class type for a constructor/destructor.
7509 Returns the actual return type of the function; that
7510 may be different than TYPE if an error occurs, or for certain
7511 special functions. */
7514 check_special_function_return_type (special_function_kind sfk
,
7520 case sfk_constructor
:
7522 error ("return type specification for constructor invalid");
7524 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
7525 type
= build_pointer_type (optype
);
7527 type
= void_type_node
;
7530 case sfk_destructor
:
7532 error ("return type specification for destructor invalid");
7533 /* We can't use the proper return type here because we run into
7534 problems with ambiguous bases and covariant returns.
7535 Java classes are left unchanged because (void *) isn't a valid
7536 Java type, and we don't want to change the Java ABI. */
7537 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
7538 type
= build_pointer_type (void_type_node
);
7540 type
= void_type_node
;
7543 case sfk_conversion
:
7545 error ("return type specified for %<operator %T%>", optype
);
7556 /* A variable or data member (whose unqualified name is IDENTIFIER)
7557 has been declared with the indicated TYPE. If the TYPE is not
7558 acceptable, issue an error message and return a type to use for
7559 error-recovery purposes. */
7562 check_var_type (tree identifier
, tree type
)
7564 if (VOID_TYPE_P (type
))
7567 error ("unnamed variable or field declared void");
7568 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
7570 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
7571 error ("variable or field %qE declared void", identifier
);
7574 error ("variable or field declared void");
7575 type
= error_mark_node
;
7581 /* Given declspecs and a declarator (abstract or otherwise), determine
7582 the name and type of the object declared and construct a DECL node
7585 DECLSPECS points to the representation of declaration-specifier
7586 sequence that precedes declarator.
7588 DECL_CONTEXT says which syntactic context this declaration is in:
7589 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7590 FUNCDEF for a function definition. Like NORMAL but a few different
7591 error messages in each case. Return value may be zero meaning
7592 this definition is too screwy to try to parse.
7593 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7594 handle member functions (which have FIELD context).
7595 Return value may be zero meaning this definition is too screwy to
7597 PARM for a parameter declaration (either within a function prototype
7598 or before a function body). Make a PARM_DECL, or return void_type_node.
7599 TPARM for a template parameter declaration.
7600 CATCHPARM for a parameter declaration before a catch clause.
7601 TYPENAME if for a typename (in a cast or sizeof).
7602 Don't make a DECL node; just return the ..._TYPE node.
7603 FIELD for a struct or union field; make a FIELD_DECL.
7604 BITFIELD for a field with specified width.
7606 INITIALIZED is as for start_decl.
7608 ATTRLIST is a pointer to the list of attributes, which may be NULL
7609 if there are none; *ATTRLIST may be modified if attributes from inside
7610 the declarator should be applied to the declaration.
7612 When this function is called, scoping variables (such as
7613 CURRENT_CLASS_TYPE) should reflect the scope in which the
7614 declaration occurs, not the scope in which the new declaration will
7615 be placed. For example, on:
7619 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7622 Returns a DECL (if a declarator is present), a TYPE (if there is no
7623 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7627 grokdeclarator (const cp_declarator
*declarator
,
7628 const cp_decl_specifier_seq
*declspecs
,
7629 enum decl_context decl_context
,
7633 tree type
= NULL_TREE
;
7635 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
7636 int explicit_int
= 0;
7637 int explicit_char
= 0;
7638 int defaulted_int
= 0;
7639 tree dependent_name
= NULL_TREE
;
7641 tree typedef_decl
= NULL_TREE
;
7642 const char *name
= NULL
;
7643 tree typedef_type
= NULL_TREE
;
7644 /* True if this declarator is a function definition. */
7645 bool funcdef_flag
= false;
7646 cp_declarator_kind innermost_code
= cdk_error
;
7649 /* See the code below that used this. */
7650 tree decl_attr
= NULL_TREE
;
7653 /* Keep track of what sort of function is being processed
7654 so that we can warn about default return values, or explicit
7655 return values which do not match prescribed defaults. */
7656 special_function_kind sfk
= sfk_none
;
7658 tree dname
= NULL_TREE
;
7659 tree ctor_return_type
= NULL_TREE
;
7660 enum overload_flags flags
= NO_SPECIAL
;
7661 /* cv-qualifiers that apply to the declarator, for a declaration of
7662 a member function. */
7663 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
7664 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7666 tree raises
= NULL_TREE
;
7667 int template_count
= 0;
7668 tree returned_attrs
= NULL_TREE
;
7669 tree parms
= NULL_TREE
;
7670 const cp_declarator
*id_declarator
;
7671 /* The unqualified name of the declarator; either an
7672 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7673 tree unqualified_id
;
7674 /* The class type, if any, in which this entity is located,
7675 or NULL_TREE if none. Note that this value may be different from
7676 the current class type; for example if an attempt is made to declare
7677 "A::f" inside "B", this value will be "A". */
7678 tree ctype
= current_class_type
;
7679 /* The NAMESPACE_DECL for the namespace in which this entity is
7680 located. If an unqualified name is used to declare the entity,
7681 this value will be NULL_TREE, even if the entity is located at
7683 tree in_namespace
= NULL_TREE
;
7684 cp_storage_class storage_class
;
7685 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
7686 bool type_was_error_mark_node
= false;
7687 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
7688 bool template_type_arg
= false;
7689 bool template_parm_flag
= false;
7690 bool constexpr_p
= declspecs
->specs
[(int) ds_constexpr
];
7693 signed_p
= declspecs
->specs
[(int)ds_signed
];
7694 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
7695 short_p
= declspecs
->specs
[(int)ds_short
];
7696 long_p
= declspecs
->specs
[(int)ds_long
];
7697 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
7698 thread_p
= declspecs
->specs
[(int)ds_thread
];
7700 if (decl_context
== FUNCDEF
)
7701 funcdef_flag
= true, decl_context
= NORMAL
;
7702 else if (decl_context
== MEMFUNCDEF
)
7703 funcdef_flag
= true, decl_context
= FIELD
;
7704 else if (decl_context
== BITFIELD
)
7705 bitfield
= 1, decl_context
= FIELD
;
7706 else if (decl_context
== TEMPLATE_TYPE_ARG
)
7707 template_type_arg
= true, decl_context
= TYPENAME
;
7708 else if (decl_context
== TPARM
)
7709 template_parm_flag
= true, decl_context
= PARM
;
7711 if (initialized
> 1)
7712 funcdef_flag
= true;
7714 /* Look inside a declarator for the name being declared
7715 and get it as a string, for an error message. */
7716 for (id_declarator
= declarator
;
7718 id_declarator
= id_declarator
->declarator
)
7720 if (id_declarator
->kind
!= cdk_id
)
7721 innermost_code
= id_declarator
->kind
;
7723 switch (id_declarator
->kind
)
7726 if (id_declarator
->declarator
7727 && id_declarator
->declarator
->kind
== cdk_id
)
7729 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
7730 if (sfk
== sfk_destructor
)
7737 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
7738 tree decl
= id_declarator
->u
.id
.unqualified_name
;
7741 if (qualifying_scope
)
7743 if (at_function_scope_p ())
7747 A declarator-id shall not be qualified except
7750 None of the cases are permitted in block
7752 if (qualifying_scope
== global_namespace
)
7753 error ("invalid use of qualified-name %<::%D%>",
7755 else if (TYPE_P (qualifying_scope
))
7756 error ("invalid use of qualified-name %<%T::%D%>",
7757 qualifying_scope
, decl
);
7759 error ("invalid use of qualified-name %<%D::%D%>",
7760 qualifying_scope
, decl
);
7761 return error_mark_node
;
7763 else if (TYPE_P (qualifying_scope
))
7765 ctype
= qualifying_scope
;
7766 if (innermost_code
!= cdk_function
7767 && current_class_type
7768 && !UNIQUELY_DERIVED_FROM_P (ctype
,
7769 current_class_type
))
7771 error ("type %qT is not derived from type %qT",
7772 ctype
, current_class_type
);
7773 return error_mark_node
;
7776 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
7777 in_namespace
= qualifying_scope
;
7779 switch (TREE_CODE (decl
))
7785 if (innermost_code
!= cdk_function
)
7787 error ("declaration of %qD as non-function", decl
);
7788 return error_mark_node
;
7790 else if (!qualifying_scope
7791 && !(current_class_type
&& at_class_scope_p ()))
7793 error ("declaration of %qD as non-member", decl
);
7794 return error_mark_node
;
7797 type
= TREE_OPERAND (decl
, 0);
7799 type
= constructor_name (type
);
7800 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
7805 case TEMPLATE_ID_EXPR
:
7807 tree fns
= TREE_OPERAND (decl
, 0);
7810 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
7812 gcc_assert (is_overloaded_fn (dname
));
7813 dname
= DECL_NAME (get_first_fn (dname
));
7818 case IDENTIFIER_NODE
:
7819 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
7822 if (C_IS_RESERVED_WORD (dname
))
7824 error ("declarator-id missing; using reserved word %qD",
7826 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
7828 else if (!IDENTIFIER_TYPENAME_P (dname
))
7829 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
7832 gcc_assert (flags
== NO_SPECIAL
);
7833 flags
= TYPENAME_FLAG
;
7834 ctor_return_type
= TREE_TYPE (dname
);
7835 sfk
= sfk_conversion
;
7836 if (is_typename_at_global_scope (dname
))
7837 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
7839 name
= "<invalid operator>";
7856 return error_mark_node
;
7861 if (id_declarator
->kind
== cdk_id
)
7867 The declarator in a function-definition shall have the form
7868 D1 ( parameter-declaration-clause) ... */
7869 if (funcdef_flag
&& innermost_code
!= cdk_function
)
7871 error ("function definition does not declare parameters");
7872 return error_mark_node
;
7875 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
7876 && innermost_code
!= cdk_function
7877 && ! (ctype
&& !declspecs
->any_specifiers_p
))
7879 error ("declaration of %qD as non-function", dname
);
7880 return error_mark_node
;
7883 /* Anything declared one level down from the top level
7884 must be one of the parameters of a function
7885 (because the body is at least two levels down). */
7887 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7888 by not allowing C++ class definitions to specify their parameters
7889 with xdecls (must be spec.d in the parmlist).
7891 Since we now wait to push a class scope until we are sure that
7892 we are in a legitimate method context, we must set oldcname
7893 explicitly (since current_class_name is not yet alive).
7895 We also want to avoid calling this a PARM if it is in a namespace. */
7897 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
7899 struct cp_binding_level
*b
= current_binding_level
;
7900 current_binding_level
= b
->level_chain
;
7901 if (current_binding_level
!= 0 && toplevel_bindings_p ())
7902 decl_context
= PARM
;
7903 current_binding_level
= b
;
7907 name
= decl_context
== PARM
? "parameter" : "type name";
7909 /* If there were multiple types specified in the decl-specifier-seq,
7910 issue an error message. */
7911 if (declspecs
->multiple_types_p
)
7913 error ("two or more data types in declaration of %qs", name
);
7914 return error_mark_node
;
7917 if (declspecs
->conflicting_specifiers_p
)
7919 error ("conflicting specifiers in declaration of %qs", name
);
7920 return error_mark_node
;
7923 /* Extract the basic type from the decl-specifier-seq. */
7924 type
= declspecs
->type
;
7925 if (type
== error_mark_node
)
7928 type_was_error_mark_node
= true;
7930 /* If the entire declaration is itself tagged as deprecated then
7931 suppress reports of deprecated items. */
7932 if (type
&& TREE_DEPRECATED (type
)
7933 && deprecated_state
!= DEPRECATED_SUPPRESS
)
7934 warn_deprecated_use (type
, NULL_TREE
);
7935 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
7937 typedef_decl
= type
;
7938 type
= TREE_TYPE (typedef_decl
);
7939 if (TREE_DEPRECATED (type
)
7940 && DECL_ARTIFICIAL (typedef_decl
)
7941 && deprecated_state
!= DEPRECATED_SUPPRESS
)
7942 warn_deprecated_use (type
, NULL_TREE
);
7944 /* No type at all: default to `int', and set DEFAULTED_INT
7945 because it was not a user-defined typedef. */
7946 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
7948 /* These imply 'int'. */
7949 type
= integer_type_node
;
7953 explicit_int
= declspecs
->explicit_int_p
;
7954 explicit_char
= declspecs
->explicit_char_p
;
7957 /* See the code below that used this. */
7959 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
7961 typedef_type
= type
;
7964 if (sfk
!= sfk_conversion
)
7965 ctor_return_type
= ctype
;
7967 if (sfk
!= sfk_none
)
7968 type
= check_special_function_return_type (sfk
, type
,
7970 else if (type
== NULL_TREE
)
7976 /* We handle `main' specially here, because 'main () { }' is so
7977 common. With no options, it is allowed. With -Wreturn-type,
7978 it is a warning. It is only an error with -pedantic-errors. */
7979 is_main
= (funcdef_flag
7980 && dname
&& MAIN_NAME_P (dname
)
7981 && ctype
== NULL_TREE
7982 && in_namespace
== NULL_TREE
7983 && current_namespace
== global_namespace
);
7985 if (type_was_error_mark_node
)
7986 /* We've already issued an error, don't complain more. */;
7987 else if (in_system_header
|| flag_ms_extensions
)
7988 /* Allow it, sigh. */;
7990 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
7992 pedwarn (input_location
, OPT_pedantic
,
7993 "ISO C++ forbids declaration of %qs with no type", name
);
7995 warning (OPT_Wreturn_type
,
7996 "ISO C++ forbids declaration of %qs with no type", name
);
7998 type
= integer_type_node
;
8003 /* Now process the modifiers that were specified
8004 and check for invalid combinations. */
8006 /* Long double is a special combination. */
8007 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
8010 type
= build_qualified_type (long_double_type_node
,
8011 cp_type_quals (type
));
8014 /* Check all other uses of type modifiers. */
8016 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
8020 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8021 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8022 else if (signed_p
&& unsigned_p
)
8023 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
8024 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
8025 error ("%<long long%> invalid for %qs", name
);
8026 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
8027 error ("%<long%> invalid for %qs", name
);
8028 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
8029 error ("%<short%> invalid for %qs", name
);
8030 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8031 error ("%<long%> or %<short%> invalid for %qs", name
);
8032 else if ((long_p
|| short_p
) && explicit_char
)
8033 error ("%<long%> or %<short%> specified with char for %qs", name
);
8034 else if (long_p
&& short_p
)
8035 error ("%<long%> and %<short%> specified together for %qs", name
);
8036 else if (type
== char16_type_node
|| type
== char32_type_node
)
8038 if (signed_p
|| unsigned_p
)
8039 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8040 else if (short_p
|| long_p
)
8041 error ("%<short%> or %<long%> invalid for %qs", name
);
8046 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& pedantic
)
8048 pedwarn (input_location
, OPT_pedantic
,
8049 "long, short, signed or unsigned used invalidly for %qs",
8051 if (flag_pedantic_errors
)
8056 /* Discard the type modifiers if they are invalid. */
8067 /* Decide whether an integer type is signed or not.
8068 Optionally treat bitfields as signed by default. */
8072 It is implementation-defined whether a plain (neither
8073 explicitly signed or unsigned) char, short, int, or long
8074 bit-field is signed or unsigned.
8076 Naturally, we extend this to long long as well. Note that
8077 this does not include wchar_t. */
8078 || (bitfield
&& !flag_signed_bitfields
8080 /* A typedef for plain `int' without `signed' can be
8081 controlled just like plain `int', but a typedef for
8082 `signed int' cannot be so controlled. */
8084 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
8085 && TREE_CODE (type
) == INTEGER_TYPE
8086 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
8089 type
= long_long_unsigned_type_node
;
8091 type
= long_unsigned_type_node
;
8093 type
= short_unsigned_type_node
;
8094 else if (type
== char_type_node
)
8095 type
= unsigned_char_type_node
;
8096 else if (typedef_decl
)
8097 type
= unsigned_type_for (type
);
8099 type
= unsigned_type_node
;
8101 else if (signed_p
&& type
== char_type_node
)
8102 type
= signed_char_type_node
;
8104 type
= long_long_integer_type_node
;
8106 type
= long_integer_type_node
;
8108 type
= short_integer_type_node
;
8110 if (declspecs
->specs
[(int)ds_complex
])
8112 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
8113 error ("complex invalid for %qs", name
);
8114 /* If we just have "complex", it is equivalent to
8115 "complex double", but if any modifiers at all are specified it is
8116 the complex form of TYPE. E.g, "complex short" is
8117 "complex short int". */
8119 else if (defaulted_int
&& ! longlong
8120 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
8121 type
= complex_double_type_node
;
8122 else if (type
== integer_type_node
)
8123 type
= complex_integer_type_node
;
8124 else if (type
== float_type_node
)
8125 type
= complex_float_type_node
;
8126 else if (type
== double_type_node
)
8127 type
= complex_double_type_node
;
8128 else if (type
== long_double_type_node
)
8129 type
= complex_long_double_type_node
;
8131 type
= build_complex_type (type
);
8134 type_quals
= TYPE_UNQUALIFIED
;
8135 if (declspecs
->specs
[(int)ds_const
])
8136 type_quals
|= TYPE_QUAL_CONST
;
8137 /* A `constexpr' specifier used in an object declaration declares
8138 the object as `const'. */
8141 if (innermost_code
== cdk_function
)
8143 else if (declspecs
->specs
[(int)ds_const
] != 0)
8144 error ("both %<const%> and %<constexpr%> cannot be used here");
8146 type_quals
|= TYPE_QUAL_CONST
;
8148 if (declspecs
->specs
[(int)ds_volatile
])
8149 type_quals
|= TYPE_QUAL_VOLATILE
;
8150 if (declspecs
->specs
[(int)ds_restrict
])
8151 type_quals
|= TYPE_QUAL_RESTRICT
;
8152 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
8153 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8156 if (TREE_CODE (type
) == FUNCTION_TYPE
8157 && type_quals
!= TYPE_UNQUALIFIED
)
8159 /* This was an error in C++98 (cv-qualifiers cannot be added to
8160 a function type), but DR 295 makes the code well-formed by
8161 dropping the extra qualifiers. */
8164 tree bad_type
= build_qualified_type (type
, type_quals
);
8165 pedwarn (input_location
, OPT_pedantic
,
8166 "ignoring %qV qualifiers added to function type %qT",
8169 type_quals
= TYPE_UNQUALIFIED
;
8171 type_quals
|= cp_type_quals (type
);
8172 type
= cp_build_qualified_type_real
8173 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
8174 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
8175 /* We might have ignored or rejected some of the qualifiers. */
8176 type_quals
= cp_type_quals (type
);
8179 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
8180 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
8181 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
8183 storage_class
= declspecs
->storage_class
;
8184 if (storage_class
== sc_static
)
8185 staticp
= 1 + (decl_context
== FIELD
);
8187 if (virtualp
&& staticp
== 2)
8189 error ("member %qD cannot be declared both virtual and static", dname
);
8190 storage_class
= sc_none
;
8193 friendp
= !! declspecs
->specs
[(int)ds_friend
];
8195 if (dependent_name
&& !friendp
)
8197 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
8198 return error_mark_node
;
8201 /* Issue errors about use of storage classes for parameters. */
8202 if (decl_context
== PARM
)
8204 if (declspecs
->specs
[(int)ds_typedef
])
8206 error ("typedef declaration invalid in parameter declaration");
8207 return error_mark_node
;
8209 else if (template_parm_flag
&& storage_class
!= sc_none
)
8211 error ("storage class specified for template parameter %qs", name
);
8212 return error_mark_node
;
8214 else if (storage_class
== sc_static
8215 || storage_class
== sc_extern
8217 error ("storage class specifiers invalid in parameter declarations");
8219 if (type_uses_auto (type
))
8221 error ("parameter declared %<auto%>");
8222 type
= error_mark_node
;
8225 /* Function parameters cannot be constexpr. If we saw one, moan
8226 and pretend it wasn't there. */
8229 error ("a parameter cannot be declared %<constexpr%>");
8234 /* Give error if `virtual' is used outside of class declaration. */
8236 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
8238 error ("%<virtual%> outside class declaration");
8242 /* Static anonymous unions are dealt with here. */
8243 if (staticp
&& decl_context
== TYPENAME
8245 && ANON_AGGR_TYPE_P (declspecs
->type
))
8246 decl_context
= FIELD
;
8248 /* Warn about storage classes that are invalid for certain
8249 kinds of declarations (parameters, typenames, etc.). */
8252 && storage_class
!= sc_extern
8253 && storage_class
!= sc_static
)
8254 || declspecs
->specs
[(int)ds_typedef
]))
8256 error ("multiple storage classes in declaration of %qs", name
);
8259 if (decl_context
!= NORMAL
8260 && ((storage_class
!= sc_none
8261 && storage_class
!= sc_mutable
)
8264 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
8265 && (storage_class
== sc_register
8266 || storage_class
== sc_auto
))
8268 else if (declspecs
->specs
[(int)ds_typedef
])
8270 else if (decl_context
== FIELD
8271 /* C++ allows static class elements. */
8272 && storage_class
== sc_static
)
8273 /* C++ also allows inlines and signed and unsigned elements,
8274 but in those cases we don't come in here. */
8278 if (decl_context
== FIELD
)
8279 error ("storage class specified for %qs", name
);
8282 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8283 error ("storage class specified for parameter %qs", name
);
8285 error ("storage class specified for typename");
8287 if (storage_class
== sc_register
8288 || storage_class
== sc_auto
8289 || storage_class
== sc_extern
8291 storage_class
= sc_none
;
8294 else if (storage_class
== sc_extern
&& funcdef_flag
8295 && ! toplevel_bindings_p ())
8296 error ("nested function %qs declared %<extern%>", name
);
8297 else if (toplevel_bindings_p ())
8299 if (storage_class
== sc_auto
)
8300 error ("top-level declaration of %qs specifies %<auto%>", name
);
8303 && storage_class
!= sc_extern
8304 && storage_class
!= sc_static
)
8306 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8311 if (storage_class
&& friendp
)
8313 error ("storage class specifiers invalid in friend function declarations");
8314 storage_class
= sc_none
;
8319 unqualified_id
= NULL_TREE
;
8322 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
8323 switch (TREE_CODE (unqualified_id
))
8326 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
8327 if (TYPE_P (unqualified_id
))
8328 unqualified_id
= constructor_name (unqualified_id
);
8331 case IDENTIFIER_NODE
:
8332 case TEMPLATE_ID_EXPR
:
8340 /* Determine the type of the entity declared by recurring on the
8342 for (; declarator
; declarator
= declarator
->declarator
)
8344 const cp_declarator
*inner_declarator
;
8347 if (type
== error_mark_node
)
8348 return error_mark_node
;
8350 attrs
= declarator
->attributes
;
8356 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
8357 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
8358 if (declarator
->kind
== cdk_function
)
8359 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
8360 if (declarator
->kind
== cdk_array
)
8361 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
8362 returned_attrs
= decl_attributes (&type
,
8363 chainon (returned_attrs
, attrs
),
8367 if (declarator
->kind
== cdk_id
)
8370 inner_declarator
= declarator
->declarator
;
8372 switch (declarator
->kind
)
8375 type
= create_array_type_for_decl (dname
, type
,
8376 declarator
->u
.array
.bounds
);
8384 /* Declaring a function type.
8385 Make sure we have a valid type for the function to return. */
8387 if (type_quals
!= TYPE_UNQUALIFIED
)
8389 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
8390 warning (OPT_Wignored_qualifiers
,
8391 "type qualifiers ignored on function return type");
8392 /* We now know that the TYPE_QUALS don't apply to the
8393 decl, but to its return type. */
8394 type_quals
= TYPE_UNQUALIFIED
;
8396 errmsg
= targetm
.invalid_return_type (type
);
8400 type
= integer_type_node
;
8403 /* Error about some types functions can't return. */
8405 if (TREE_CODE (type
) == FUNCTION_TYPE
)
8407 error ("%qs declared as function returning a function", name
);
8408 return error_mark_node
;
8410 if (TREE_CODE (type
) == ARRAY_TYPE
)
8412 error ("%qs declared as function returning an array", name
);
8413 return error_mark_node
;
8416 /* Pick up type qualifiers which should be applied to `this'. */
8417 memfn_quals
= declarator
->u
.function
.qualifiers
;
8419 /* Pick up the exception specifications. */
8420 raises
= declarator
->u
.function
.exception_specification
;
8422 /* Say it's a definition only for the CALL_EXPR
8423 closest to the identifier. */
8424 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
8426 /* Handle a late-specified return type. */
8429 if (type_uses_auto (type
))
8431 if (!declarator
->u
.function
.late_return_type
)
8433 error ("%qs function uses %<auto%> type specifier without"
8434 " late return type", name
);
8435 return error_mark_node
;
8437 else if (!is_auto (type
))
8439 error ("%qs function with late return type has"
8440 " %qT as its type rather than plain %<auto%>",
8442 return error_mark_node
;
8445 else if (declarator
->u
.function
.late_return_type
)
8447 error ("%qs function with late return type not declared"
8448 " with %<auto%> type specifier", name
);
8449 return error_mark_node
;
8452 type
= splice_late_return_type
8453 (type
, declarator
->u
.function
.late_return_type
);
8454 if (type
== error_mark_node
)
8455 return error_mark_node
;
8457 if (ctype
== NULL_TREE
8458 && decl_context
== FIELD
8460 && (friendp
== 0 || dname
== current_class_name
))
8461 ctype
= current_class_type
;
8463 if (ctype
&& (sfk
== sfk_constructor
8464 || sfk
== sfk_destructor
))
8466 /* We are within a class's scope. If our declarator name
8467 is the same as the class name, and we are defining
8468 a function, then it is a constructor/destructor, and
8469 therefore returns a void type. */
8471 /* ISO C++ 12.4/2. A destructor may not be declared
8472 const or volatile. A destructor may not be
8475 ISO C++ 12.1. A constructor may not be declared
8476 const or volatile. A constructor may not be
8477 virtual. A constructor may not be static. */
8479 error ((flags
== DTOR_FLAG
)
8480 ? "destructor cannot be static member function"
8481 : "constructor cannot be static member function");
8484 error ((flags
== DTOR_FLAG
)
8485 ? "destructors may not be cv-qualified"
8486 : "constructors may not be cv-qualified");
8487 memfn_quals
= TYPE_UNQUALIFIED
;
8490 if (decl_context
== FIELD
8491 && !member_function_or_else (ctype
,
8494 return error_mark_node
;
8496 if (flags
!= DTOR_FLAG
)
8498 /* It's a constructor. */
8503 permerror (input_location
, "constructors cannot be declared virtual");
8506 if (decl_context
== FIELD
8507 && sfk
!= sfk_constructor
)
8508 return error_mark_node
;
8510 if (decl_context
== FIELD
)
8516 error ("can't initialize friend function %qs", name
);
8519 /* Cannot be both friend and virtual. */
8520 error ("virtual functions cannot be friends");
8523 if (decl_context
== NORMAL
)
8524 error ("friend declaration not in class definition");
8525 if (current_function_decl
&& funcdef_flag
)
8526 error ("can't define friend function %qs in a local "
8530 else if (ctype
&& sfk
== sfk_conversion
)
8534 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
8539 /* It is not allowed to use `constexpr' in a function
8540 declaration that is not a definition.
8541 That is too strict, though. */
8542 if (constexpr_p
&& !funcdef_flag
)
8544 error ("the %<constexpr%> specifier cannot be used in "
8545 "a function declaration that is not a definition");
8546 constexpr_p
= false;
8549 /* A constexpr non-static member function is implicitly const. */
8550 if (constexpr_p
&& decl_context
== FIELD
&& staticp
== 0
8551 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
8552 memfn_quals
|= TYPE_QUAL_CONST
;
8554 arg_types
= grokparms (declarator
->u
.function
.parameters
,
8557 if (inner_declarator
8558 && inner_declarator
->kind
== cdk_id
8559 && inner_declarator
->u
.id
.sfk
== sfk_destructor
8560 && arg_types
!= void_list_node
)
8562 error ("destructors may not have parameters");
8563 arg_types
= void_list_node
;
8567 type
= build_function_type (type
, arg_types
);
8574 /* Filter out pointers-to-references and references-to-references.
8575 We can get these if a TYPE_DECL is used. */
8577 if (TREE_CODE (type
) == REFERENCE_TYPE
)
8579 if (declarator
->kind
!= cdk_reference
)
8581 error ("cannot declare pointer to %q#T", type
);
8582 type
= TREE_TYPE (type
);
8585 /* In C++0x, we allow reference to reference declarations
8586 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8587 and template type arguments [14.3.1/4 temp.arg.type]. The
8588 check for direct reference to reference declarations, which
8589 are still forbidden, occurs below. Reasoning behind the change
8590 can be found in DR106, DR540, and the rvalue reference
8592 else if (cxx_dialect
== cxx98
)
8594 error ("cannot declare reference to %q#T", type
);
8595 type
= TREE_TYPE (type
);
8598 else if (VOID_TYPE_P (type
))
8600 if (declarator
->kind
== cdk_reference
)
8601 error ("cannot declare reference to %q#T", type
);
8602 else if (declarator
->kind
== cdk_ptrmem
)
8603 error ("cannot declare pointer to %q#T member", type
);
8606 /* We now know that the TYPE_QUALS don't apply to the decl,
8607 but to the target of the pointer. */
8608 type_quals
= TYPE_UNQUALIFIED
;
8610 if (declarator
->kind
== cdk_ptrmem
8611 && (TREE_CODE (type
) == FUNCTION_TYPE
8612 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
8614 memfn_quals
|= cp_type_quals (type
);
8615 type
= build_memfn_type (type
,
8616 declarator
->u
.pointer
.class_type
,
8618 memfn_quals
= TYPE_UNQUALIFIED
;
8621 if (TREE_CODE (type
) == FUNCTION_TYPE
8622 && cp_type_quals (type
) != TYPE_UNQUALIFIED
)
8623 error ("cannot declare %s to qualified function type %qT",
8624 declarator
->kind
== cdk_reference
? "reference" : "pointer",
8627 if (declarator
->kind
== cdk_reference
)
8629 /* In C++0x, the type we are creating a reference to might be
8630 a typedef which is itself a reference type. In that case,
8631 we follow the reference collapsing rules in
8632 [7.1.3/8 dcl.typedef] to create the final reference type:
8634 "If a typedef TD names a type that is a reference to a type
8635 T, an attempt to create the type 'lvalue reference to cv TD'
8636 creates the type 'lvalue reference to T,' while an attempt
8637 to create the type "rvalue reference to cv TD' creates the
8640 if (!VOID_TYPE_P (type
))
8641 type
= cp_build_reference_type
8642 ((TREE_CODE (type
) == REFERENCE_TYPE
8643 ? TREE_TYPE (type
) : type
),
8644 (declarator
->u
.reference
.rvalue_ref
8645 && (TREE_CODE(type
) != REFERENCE_TYPE
8646 || TYPE_REF_IS_RVALUE (type
))));
8648 /* In C++0x, we need this check for direct reference to
8649 reference declarations, which are forbidden by
8650 [8.3.2/5 dcl.ref]. Reference to reference declarations
8651 are only allowed indirectly through typedefs and template
8652 type arguments. Example:
8654 void foo(int & &); // invalid ref-to-ref decl
8656 typedef int & int_ref;
8657 void foo(int_ref &); // valid ref-to-ref decl
8659 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
8660 error ("cannot declare reference to %q#T, which is not "
8661 "a typedef or a template type argument", type
);
8663 else if (TREE_CODE (type
) == METHOD_TYPE
)
8664 type
= build_ptrmemfunc_type (build_pointer_type (type
));
8665 else if (declarator
->kind
== cdk_ptrmem
)
8667 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
8669 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
8670 /* We will already have complained. */
8671 type
= error_mark_node
;
8673 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
8677 type
= build_pointer_type (type
);
8679 /* Process a list of type modifier keywords (such as
8680 const or volatile) that were given inside the `*' or `&'. */
8682 if (declarator
->u
.pointer
.qualifiers
)
8685 = cp_build_qualified_type (type
,
8686 declarator
->u
.pointer
.qualifiers
);
8687 type_quals
= cp_type_quals (type
);
8700 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
8701 && TREE_CODE (type
) != FUNCTION_TYPE
8702 && TREE_CODE (type
) != METHOD_TYPE
)
8704 error ("template-id %qD used as a declarator",
8706 unqualified_id
= dname
;
8709 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8710 qualified with a class-name, turn it into a METHOD_TYPE, unless
8711 we know that the function is static. We take advantage of this
8712 opportunity to do other processing that pertains to entities
8713 explicitly declared to be class members. Note that if DECLARATOR
8714 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8715 would not have exited the loop above. */
8717 && declarator
->u
.id
.qualifying_scope
8718 && TYPE_P (declarator
->u
.id
.qualifying_scope
))
8722 ctype
= declarator
->u
.id
.qualifying_scope
;
8723 ctype
= TYPE_MAIN_VARIANT (ctype
);
8725 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
8727 /* You're supposed to have one `template <...>' for every
8728 template class, but you don't need one for a full
8729 specialization. For example:
8731 template <class T> struct S{};
8732 template <> struct S<int> { void f(); };
8733 void S<int>::f () {}
8735 is correct; there shouldn't be a `template <>' for the
8736 definition of `S<int>::f'. */
8737 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
8738 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
8739 /* T is an explicit (not partial) specialization. All
8740 containing classes must therefore also be explicitly
8743 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
8744 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
8745 template_count
+= 1;
8747 t
= TYPE_MAIN_DECL (t
);
8748 t
= DECL_CONTEXT (t
);
8751 if (ctype
== current_class_type
)
8755 permerror (input_location
, "member functions are implicitly friends of their class");
8759 permerror (declarator
->id_loc
,
8760 "extra qualification %<%T::%> on member %qs",
8763 else if (/* If the qualifying type is already complete, then we
8764 can skip the following checks. */
8765 !COMPLETE_TYPE_P (ctype
)
8766 && (/* If the function is being defined, then
8767 qualifying type must certainly be complete. */
8769 /* A friend declaration of "T::f" is OK, even if
8770 "T" is a template parameter. But, if this
8771 function is not a friend, the qualifying type
8773 || (!friendp
&& !CLASS_TYPE_P (ctype
))
8774 /* For a declaration, the type need not be
8775 complete, if either it is dependent (since there
8776 is no meaningful definition of complete in that
8777 case) or the qualifying class is currently being
8779 || !(dependent_type_p (ctype
)
8780 || currently_open_class (ctype
)))
8781 /* Check that the qualifying type is complete. */
8782 && !complete_type_or_else (ctype
, NULL_TREE
))
8783 return error_mark_node
;
8784 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
8786 tree sname
= declarator
->u
.id
.unqualified_name
;
8788 if (current_class_type
8789 && (!friendp
|| funcdef_flag
))
8792 ? "cannot define member function %<%T::%s%> within %<%T%>"
8793 : "cannot declare member function %<%T::%s%> within %<%T%>",
8794 ctype
, name
, current_class_type
);
8795 return error_mark_node
;
8798 /* It is not permitted to define a member function outside ist
8799 membership class as `constexpr'. */
8801 error ("a constexpr function cannot be defined "
8802 "outside of its class");
8804 if (TREE_CODE (sname
) == IDENTIFIER_NODE
8805 && NEW_DELETE_OPNAME_P (sname
))
8806 /* Overloaded operator new and operator delete
8807 are always static functions. */
8810 type
= build_memfn_type (type
, ctype
, memfn_quals
);
8812 else if (declspecs
->specs
[(int)ds_typedef
]
8813 && current_class_type
)
8815 error ("cannot declare member %<%T::%s%> within %qT",
8816 ctype
, name
, current_class_type
);
8817 return error_mark_node
;
8821 /* Now TYPE has the actual type. */
8826 *attrlist
= chainon (returned_attrs
, *attrlist
);
8828 attrlist
= &returned_attrs
;
8831 /* Handle parameter packs. */
8832 if (parameter_pack_p
)
8834 if (decl_context
== PARM
)
8835 /* Turn the type into a pack expansion.*/
8836 type
= make_pack_expansion (type
);
8838 error ("non-parameter %qs cannot be a parameter pack", name
);
8841 /* Did array size calculations overflow? */
8843 if (TREE_CODE (type
) == ARRAY_TYPE
8844 && COMPLETE_TYPE_P (type
)
8845 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
8846 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
8848 error ("size of array %qs is too large", name
);
8849 /* If we proceed with the array type as it is, we'll eventually
8850 crash in tree_low_cst(). */
8851 type
= error_mark_node
;
8854 if ((decl_context
== FIELD
|| decl_context
== PARM
)
8855 && !processing_template_decl
8856 && variably_modified_type_p (type
, NULL_TREE
))
8858 if (decl_context
== FIELD
)
8859 error ("data member may not have variably modified type %qT", type
);
8861 error ("parameter may not have variably modified type %qT", type
);
8862 type
= error_mark_node
;
8865 if (explicitp
== 1 || (explicitp
&& friendp
))
8867 /* [dcl.fct.spec] The explicit specifier shall only be used in
8868 declarations of constructors within a class definition. */
8869 error ("only declarations of constructors can be %<explicit%>");
8873 if (storage_class
== sc_mutable
)
8875 if (decl_context
!= FIELD
|| friendp
)
8877 error ("non-member %qs cannot be declared %<mutable%>", name
);
8878 storage_class
= sc_none
;
8880 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
8882 error ("non-object member %qs cannot be declared %<mutable%>", name
);
8883 storage_class
= sc_none
;
8885 else if (TREE_CODE (type
) == FUNCTION_TYPE
8886 || TREE_CODE (type
) == METHOD_TYPE
)
8888 error ("function %qs cannot be declared %<mutable%>", name
);
8889 storage_class
= sc_none
;
8893 error ("static %qs cannot be declared %<mutable%>", name
);
8894 storage_class
= sc_none
;
8896 else if (type_quals
& TYPE_QUAL_CONST
)
8898 error ("const %qs cannot be declared %<mutable%>", name
);
8899 storage_class
= sc_none
;
8903 /* If this is declaring a typedef name, return a TYPE_DECL. */
8904 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
8908 /* Note that the grammar rejects storage classes
8909 in typenames, fields or parameters. */
8910 if (current_lang_name
== lang_name_java
)
8911 TYPE_FOR_JAVA (type
) = 1;
8913 /* This declaration:
8915 typedef void f(int) const;
8917 declares a function type which is not a member of any
8918 particular class, but which is cv-qualified; for
8919 example "f S::*" declares a pointer to a const-qualified
8920 member function of S. We record the cv-qualification in the
8922 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
8924 type
= cp_build_qualified_type (type
, memfn_quals
);
8926 /* We have now dealt with these qualifiers. */
8927 memfn_quals
= TYPE_UNQUALIFIED
;
8930 if (decl_context
== FIELD
)
8931 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
8933 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
8934 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
8935 error_at (DECL_SOURCE_LOCATION (decl
),
8936 "typedef name may not be a nested-name-specifier");
8937 TREE_TYPE (decl
) = error_mark_node
;
8940 if (decl_context
!= FIELD
)
8942 if (!current_function_decl
)
8943 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
8944 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
8945 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8946 (current_function_decl
)))
8947 /* The TYPE_DECL is "abstract" because there will be
8948 clones of this constructor/destructor, and there will
8949 be copies of this TYPE_DECL generated in those
8951 DECL_ABSTRACT (decl
) = 1;
8953 else if (constructor_name_p (unqualified_id
, current_class_type
))
8954 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
8955 "as enclosing class",
8958 /* If the user declares "typedef struct {...} foo" then the
8959 struct will have an anonymous name. Fill that name in now.
8960 Nothing can refer to it, so nothing needs know about the name
8962 if (type
!= error_mark_node
8965 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
8966 && TYPE_ANONYMOUS_P (type
)
8967 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
8971 /* Replace the anonymous name with the real name everywhere. */
8972 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
8974 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
8976 debug_hooks
->set_name (t
, decl
);
8977 TYPE_NAME (t
) = decl
;
8981 if (TYPE_LANG_SPECIFIC (type
))
8982 TYPE_WAS_ANONYMOUS (type
) = 1;
8984 /* If this is a typedef within a template class, the nested
8985 type is a (non-primary) template. The name for the
8986 template needs updating as well. */
8987 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
8988 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
8989 = TYPE_IDENTIFIER (type
);
8991 /* Adjust linkage now that we aren't anonymous anymore. */
8992 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
8993 determine_visibility (TYPE_MAIN_DECL (type
));
8995 /* FIXME remangle member functions; member functions of a
8996 type with external linkage have external linkage. */
9000 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
9001 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
9003 bad_specifiers (decl
, "type", virtualp
,
9004 memfn_quals
!= TYPE_UNQUALIFIED
,
9005 inlinep
, friendp
, raises
!= NULL_TREE
);
9010 /* Detect the case of an array type of unspecified size
9011 which came, as such, direct from a typedef name.
9012 We must copy the type, so that the array's domain can be
9013 individually set by the object's initializer. */
9015 if (type
&& typedef_type
9016 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
9017 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
9018 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
9020 /* Detect where we're using a typedef of function type to declare a
9021 function. PARMS will not be set, so we must create it now. */
9023 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9025 tree decls
= NULL_TREE
;
9028 for (args
= TYPE_ARG_TYPES (type
);
9029 args
&& args
!= void_list_node
;
9030 args
= TREE_CHAIN (args
))
9032 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
9034 TREE_CHAIN (decl
) = decls
;
9038 parms
= nreverse (decls
);
9040 if (decl_context
!= TYPENAME
)
9042 /* A cv-qualifier-seq shall only be part of the function type
9043 for a non-static member function. [8.3.5/4 dcl.fct] */
9044 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
9045 && (current_class_type
== NULL_TREE
|| staticp
) )
9048 ? G_("qualified function types cannot be used to "
9049 "declare static member functions")
9050 : G_("qualified function types cannot be used to "
9051 "declare free functions"));
9052 type
= TYPE_MAIN_VARIANT (type
);
9055 /* The qualifiers on the function type become the qualifiers on
9056 the non-static member function. */
9057 memfn_quals
|= cp_type_quals (type
);
9061 /* If this is a type name (such as, in a cast or sizeof),
9062 compute the type and return it now. */
9064 if (decl_context
== TYPENAME
)
9066 /* Note that the grammar rejects storage classes
9067 in typenames, fields or parameters. */
9068 if (type_quals
!= TYPE_UNQUALIFIED
)
9069 type_quals
= TYPE_UNQUALIFIED
;
9071 /* Special case: "friend class foo" looks like a TYPENAME context. */
9074 if (type_quals
!= TYPE_UNQUALIFIED
)
9076 error ("type qualifiers specified for friend class declaration");
9077 type_quals
= TYPE_UNQUALIFIED
;
9081 error ("%<inline%> specified for friend class declaration");
9087 /* Don't allow friend declaration without a class-key. */
9088 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9089 permerror (input_location
, "template parameters cannot be friends");
9090 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
9091 permerror (input_location
, "friend declaration requires class-key, "
9092 "i.e. %<friend class %T::%D%>",
9093 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
9095 permerror (input_location
, "friend declaration requires class-key, "
9096 "i.e. %<friend %#T%>",
9100 /* Only try to do this stuff if we didn't already give up. */
9101 if (type
!= integer_type_node
)
9103 /* A friendly class? */
9104 if (current_class_type
)
9105 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
9108 error ("trying to make class %qT a friend of global scope",
9111 type
= void_type_node
;
9114 else if (memfn_quals
)
9116 if (ctype
== NULL_TREE
9117 && TREE_CODE (type
) == METHOD_TYPE
)
9118 ctype
= TYPE_METHOD_BASETYPE (type
);
9121 type
= build_memfn_type (type
, ctype
, memfn_quals
);
9122 /* Core issue #547: need to allow this in template type args. */
9123 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9124 type
= cp_build_qualified_type (type
, memfn_quals
);
9126 error ("invalid qualifiers on non-member function type");
9131 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
9132 && decl_context
!= CATCHPARM
9133 && TREE_CODE (type
) != UNION_TYPE
9136 error ("abstract declarator %qT used as declaration", type
);
9137 return error_mark_node
;
9140 /* Only functions may be declared using an operator-function-id. */
9142 && IDENTIFIER_OPNAME_P (unqualified_id
)
9143 && TREE_CODE (type
) != FUNCTION_TYPE
9144 && TREE_CODE (type
) != METHOD_TYPE
)
9146 error ("declaration of %qD as non-function", unqualified_id
);
9147 return error_mark_node
;
9150 /* We don't check parameter types here because we can emit a better
9151 error message later. */
9152 if (decl_context
!= PARM
)
9154 type
= check_var_type (unqualified_id
, type
);
9155 if (type
== error_mark_node
)
9156 return error_mark_node
;
9159 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9160 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9162 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9164 if (ctype
|| in_namespace
)
9165 error ("cannot use %<::%> in parameter declaration");
9167 /* A parameter declared as an array of T is really a pointer to T.
9168 One declared as a function is really a pointer to a function.
9169 One declared as a member is really a pointer to member. */
9171 if (TREE_CODE (type
) == ARRAY_TYPE
)
9173 /* Transfer const-ness of array into that of type pointed to. */
9174 type
= build_pointer_type (TREE_TYPE (type
));
9175 type_quals
= TYPE_UNQUALIFIED
;
9177 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9178 type
= build_pointer_type (type
);
9184 if (decl_context
== PARM
)
9186 decl
= cp_build_parm_decl (unqualified_id
, type
);
9188 bad_specifiers (decl
, "parameter", virtualp
,
9189 memfn_quals
!= TYPE_UNQUALIFIED
,
9190 inlinep
, friendp
, raises
!= NULL_TREE
);
9192 else if (decl_context
== FIELD
)
9194 /* The C99 flexible array extension. */
9195 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
9196 && TYPE_DOMAIN (type
) == NULL_TREE
)
9198 tree itype
= compute_array_index_type (dname
, integer_zero_node
);
9199 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
9202 if (type
== error_mark_node
)
9204 /* Happens when declaring arrays of sizes which
9205 are error_mark_node, for example. */
9208 else if (in_namespace
&& !friendp
)
9210 /* Something like struct S { int N::j; }; */
9211 error ("invalid use of %<::%>");
9212 return error_mark_node
;
9214 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9217 tree function_context
;
9221 if (ctype
== NULL_TREE
)
9222 ctype
= current_class_type
;
9224 if (ctype
== NULL_TREE
)
9226 error ("can't make %qD into a method -- not in a class",
9228 return error_mark_node
;
9231 /* ``A union may [ ... ] not [ have ] virtual functions.''
9233 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
9235 error ("function %qD declared virtual inside a union",
9237 return error_mark_node
;
9240 if (NEW_DELETE_OPNAME_P (unqualified_id
))
9244 error ("%qD cannot be declared virtual, since it "
9250 else if (staticp
< 2)
9251 type
= build_memfn_type (type
, ctype
, memfn_quals
);
9254 /* Check that the name used for a destructor makes sense. */
9255 if (sfk
== sfk_destructor
)
9257 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
9261 gcc_assert (friendp
);
9262 error ("expected qualified name in friend declaration "
9263 "for destructor %qD", uqname
);
9264 return error_mark_node
;
9267 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
9269 error ("declaration of %qD as member of %qT",
9271 return error_mark_node
;
9274 error ("a destructor cannot be %<constexpr%>");
9276 else if (sfk
== sfk_constructor
&& friendp
)
9278 error ("expected qualified name in friend declaration "
9279 "for constructor %qD",
9280 id_declarator
->u
.id
.unqualified_name
);
9281 return error_mark_node
;
9284 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9285 function_context
= (ctype
!= NULL_TREE
) ?
9286 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
9287 publicp
= (! friendp
|| ! staticp
)
9288 && function_context
== NULL_TREE
;
9289 decl
= grokfndecl (ctype
, type
,
9290 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
9291 ? unqualified_id
: dname
,
9294 virtualp
, flags
, memfn_quals
, raises
,
9295 friendp
? -1 : 0, friendp
, publicp
,
9296 inlinep
|| constexpr_p
,
9298 funcdef_flag
, template_count
, in_namespace
,
9299 attrlist
, declarator
->id_loc
);
9300 if (decl
== NULL_TREE
)
9301 return error_mark_node
;
9303 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9304 /* The decl and setting of decl_attr is also turned off. */
9305 decl
= build_decl_attribute_variant (decl
, decl_attr
);
9308 /* [class.conv.ctor]
9310 A constructor declared without the function-specifier
9311 explicit that can be called with a single parameter
9312 specifies a conversion from the type of its first
9313 parameter to the type of its class. Such a constructor
9314 is called a converting constructor. */
9316 DECL_NONCONVERTING_P (decl
) = 1;
9318 else if (TREE_CODE (type
) == METHOD_TYPE
)
9320 /* We only get here for friend declarations of
9321 members of other classes. */
9322 /* All method decls are public, so tell grokfndecl to set
9323 TREE_PUBLIC, also. */
9324 decl
= grokfndecl (ctype
, type
,
9325 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
9326 ? unqualified_id
: dname
,
9329 virtualp
, flags
, memfn_quals
, raises
,
9330 friendp
? -1 : 0, friendp
, 1, 0, sfk
,
9331 funcdef_flag
, template_count
, in_namespace
,
9333 declarator
->id_loc
);
9334 if (decl
== NULL_TREE
)
9335 return error_mark_node
;
9337 else if (!staticp
&& !dependent_type_p (type
)
9338 && !COMPLETE_TYPE_P (complete_type (type
))
9339 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
9342 error ("field %qD has incomplete type", unqualified_id
);
9344 error ("name %qT has incomplete type", type
);
9346 /* If we're instantiating a template, tell them which
9347 instantiation made the field's type be incomplete. */
9348 if (current_class_type
9349 && TYPE_NAME (current_class_type
)
9350 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type
))
9352 && declspecs
->type
== type
)
9353 error (" in instantiation of template %qT",
9354 current_class_type
);
9356 return error_mark_node
;
9362 error ("%qE is neither function nor member function; "
9363 "cannot be declared friend", unqualified_id
);
9371 /* Friends are treated specially. */
9372 if (ctype
== current_class_type
)
9373 ; /* We already issued a permerror. */
9374 else if (decl
&& DECL_NAME (decl
))
9376 if (template_class_depth (current_class_type
) == 0)
9378 decl
= check_explicit_specialization
9379 (unqualified_id
, decl
, template_count
,
9380 2 * funcdef_flag
+ 4);
9381 if (decl
== error_mark_node
)
9382 return error_mark_node
;
9385 DECL_DECLARED_CONSTEXPR_P (decl
) = constexpr_p
;
9386 decl
= do_friend (ctype
, unqualified_id
, decl
,
9392 return error_mark_node
;
9395 /* Structure field. It may not be a function, except for C++. */
9397 if (decl
== NULL_TREE
)
9403 /* An attempt is being made to initialize a non-static
9404 member. But, from [class.mem]:
9406 4 A member-declarator can contain a
9407 constant-initializer only if it declares a static
9408 member (_class.static_) of integral or enumeration
9409 type, see _class.static.data_.
9411 This used to be relatively common practice, but
9412 the rest of the compiler does not correctly
9413 handle the initialization unless the member is
9414 static so we make it static below. */
9415 permerror (input_location
, "ISO C++ forbids initialization of member %qD",
9417 permerror (input_location
, "making %qD static", unqualified_id
);
9421 if (uses_template_parms (type
))
9422 /* We'll check at instantiation time. */
9424 else if (check_static_variable_definition (unqualified_id
,
9426 /* If we just return the declaration, crashes
9427 will sometimes occur. We therefore return
9428 void_type_node, as if this was a friend
9429 declaration, to cause callers to completely
9430 ignore this declaration. */
9431 return error_mark_node
;
9436 /* C++ allows static class members. All other work
9437 for this is done by grokfield. */
9438 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
9439 set_linkage_for_static_data_member (decl
);
9440 /* Even if there is an in-class initialization, DECL
9441 is considered undefined until an out-of-class
9442 definition is provided. */
9443 DECL_EXTERNAL (decl
) = 1;
9446 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
9451 error ("non-static data member %qE declared %<constexpr%>",
9453 decl
= build_decl (input_location
,
9454 FIELD_DECL
, unqualified_id
, type
);
9455 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
9456 if (bitfield
&& !unqualified_id
)
9457 TREE_NO_WARNING (decl
) = 1;
9459 if (storage_class
== sc_mutable
)
9461 DECL_MUTABLE_P (decl
) = 1;
9462 storage_class
= sc_none
;
9466 bad_specifiers (decl
, "field", virtualp
,
9467 memfn_quals
!= TYPE_UNQUALIFIED
,
9468 inlinep
, friendp
, raises
!= NULL_TREE
);
9471 else if (TREE_CODE (type
) == FUNCTION_TYPE
9472 || TREE_CODE (type
) == METHOD_TYPE
)
9477 if (!unqualified_id
)
9478 return error_mark_node
;
9480 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
9481 original_name
= dname
;
9483 original_name
= unqualified_id
;
9485 if (storage_class
== sc_auto
)
9486 error ("storage class %<auto%> invalid for function %qs", name
);
9487 else if (storage_class
== sc_register
)
9488 error ("storage class %<register%> invalid for function %qs", name
);
9490 error ("storage class %<__thread%> invalid for function %qs", name
);
9492 /* Function declaration not at top level.
9493 Storage classes other than `extern' are not allowed
9494 and `extern' makes no difference. */
9495 if (! toplevel_bindings_p ()
9496 && (storage_class
== sc_static
9497 || declspecs
->specs
[(int)ds_inline
])
9500 if (storage_class
== sc_static
)
9501 pedwarn (input_location
, OPT_pedantic
,
9502 "%<static%> specified invalid for function %qs "
9503 "declared out of global scope", name
);
9505 pedwarn (input_location
, OPT_pedantic
,
9506 "%<inline%> specifier invalid for function %qs "
9507 "declared out of global scope", name
);
9510 if (ctype
!= NULL_TREE
9511 && TREE_CODE (ctype
) != NAMESPACE_DECL
&& !MAYBE_CLASS_TYPE_P (ctype
))
9513 error ("%q#T is not a class or a namespace", ctype
);
9517 if (ctype
== NULL_TREE
)
9521 error ("virtual non-class function %qs", name
);
9524 else if (sfk
== sfk_constructor
9525 || sfk
== sfk_destructor
)
9528 ? "%qs defined in a non-class scope"
9529 : "%qs declared in a non-class scope", name
);
9533 else if (TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
9534 && !NEW_DELETE_OPNAME_P (original_name
))
9535 type
= build_method_type_directly (ctype
,
9537 TYPE_ARG_TYPES (type
));
9539 /* Record presence of `static'. */
9540 publicp
= (ctype
!= NULL_TREE
9541 || storage_class
== sc_extern
9542 || storage_class
!= sc_static
);
9544 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
9545 virtualp
, flags
, memfn_quals
, raises
,
9547 publicp
, inlinep
|| constexpr_p
, sfk
, funcdef_flag
,
9548 template_count
, in_namespace
, attrlist
,
9549 declarator
->id_loc
);
9550 if (decl
== NULL_TREE
)
9551 return error_mark_node
;
9555 int invalid_static
= 0;
9557 /* Don't allow a static member function in a class, and forbid
9558 declaring main to be static. */
9559 if (TREE_CODE (type
) == METHOD_TYPE
)
9561 permerror (input_location
, "cannot declare member function %qD to have "
9562 "static linkage", decl
);
9565 else if (current_function_decl
)
9567 /* FIXME need arm citation */
9568 error ("cannot declare static function inside another function");
9575 storage_class
= sc_none
;
9581 /* It's a variable. */
9583 /* An uninitialized decl with `extern' is a reference. */
9584 decl
= grokvardecl (type
, unqualified_id
,
9587 (type_quals
& TYPE_QUAL_CONST
) != 0,
9588 ctype
? ctype
: in_namespace
);
9589 bad_specifiers (decl
, "variable", virtualp
,
9590 memfn_quals
!= TYPE_UNQUALIFIED
,
9591 inlinep
, friendp
, raises
!= NULL_TREE
);
9595 DECL_CONTEXT (decl
) = ctype
;
9598 permerror (input_location
, "%<static%> may not be used when defining "
9599 "(as opposed to declaring) a static data member");
9601 storage_class
= sc_none
;
9603 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
9605 error ("static member %qD declared %<register%>", decl
);
9606 storage_class
= sc_none
;
9608 if (storage_class
== sc_extern
&& pedantic
)
9610 pedwarn (input_location
, OPT_pedantic
,
9611 "cannot explicitly declare member %q#D to have "
9612 "extern linkage", decl
);
9613 storage_class
= sc_none
;
9618 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
9620 if (toplevel_bindings_p ())
9622 /* It's common practice (and completely valid) to have a const
9623 be initialized and declared extern. */
9624 if (!(type_quals
& TYPE_QUAL_CONST
))
9625 warning (0, "%qs initialized and declared %<extern%>", name
);
9629 error ("%qs has both %<extern%> and initializer", name
);
9630 return error_mark_node
;
9634 /* Record `register' declaration for warnings on &
9635 and in case doing stupid register allocation. */
9637 if (storage_class
== sc_register
)
9638 DECL_REGISTER (decl
) = 1;
9639 else if (storage_class
== sc_extern
)
9640 DECL_THIS_EXTERN (decl
) = 1;
9641 else if (storage_class
== sc_static
)
9642 DECL_THIS_STATIC (decl
) = 1;
9644 /* Don't forget constexprness. */
9645 if (VAR_OR_FUNCTION_DECL_P (decl
))
9646 DECL_DECLARED_CONSTEXPR_P (decl
) = constexpr_p
;
9648 /* Record constancy and volatility on the DECL itself . There's
9649 no need to do this when processing a template; we'll do this
9650 for the instantiated declaration based on the type of DECL. */
9651 if (!processing_template_decl
)
9652 cp_apply_type_quals_to_decl (type_quals
, decl
);
9658 /* Subroutine of start_function. Ensure that each of the parameter
9659 types (as listed in PARMS) is complete, as is required for a
9660 function definition. */
9663 require_complete_types_for_parms (tree parms
)
9665 for (; parms
; parms
= TREE_CHAIN (parms
))
9667 if (dependent_type_p (TREE_TYPE (parms
)))
9669 if (!VOID_TYPE_P (TREE_TYPE (parms
))
9670 && complete_type_or_else (TREE_TYPE (parms
), parms
))
9672 relayout_decl (parms
);
9673 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
9676 /* grokparms or complete_type_or_else will have already issued
9678 TREE_TYPE (parms
) = error_mark_node
;
9682 /* Returns nonzero if T is a local variable. */
9685 local_variable_p (const_tree t
)
9687 if ((TREE_CODE (t
) == VAR_DECL
9688 /* A VAR_DECL with a context that is a _TYPE is a static data
9690 && !TYPE_P (CP_DECL_CONTEXT (t
))
9691 /* Any other non-local variable must be at namespace scope. */
9692 && !DECL_NAMESPACE_SCOPE_P (t
))
9693 || (TREE_CODE (t
) == PARM_DECL
))
9699 /* Like local_variable_p, but suitable for use as a tree-walking
9703 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
9704 void *data ATTRIBUTE_UNUSED
)
9706 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
9708 else if (TYPE_P (*tp
))
9715 /* Check that ARG, which is a default-argument expression for a
9716 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9717 something goes wrong. DECL may also be a _TYPE node, rather than a
9718 DECL, if there is no DECL available. */
9721 check_default_argument (tree decl
, tree arg
)
9726 if (TREE_CODE (arg
) == DEFAULT_ARG
)
9727 /* We get a DEFAULT_ARG when looking at an in-class declaration
9728 with a default argument. Ignore the argument for now; we'll
9729 deal with it after the class is complete. */
9738 decl_type
= TREE_TYPE (decl
);
9740 if (arg
== error_mark_node
9741 || decl
== error_mark_node
9742 || TREE_TYPE (arg
) == error_mark_node
9743 || decl_type
== error_mark_node
)
9744 /* Something already went wrong. There's no need to check
9746 return error_mark_node
;
9748 /* [dcl.fct.default]
9750 A default argument expression is implicitly converted to the
9752 if (!TREE_TYPE (arg
)
9753 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
9756 error ("default argument for %q#D has type %qT",
9757 decl
, TREE_TYPE (arg
));
9759 error ("default argument for parameter of type %qT has type %qT",
9760 decl_type
, TREE_TYPE (arg
));
9762 return error_mark_node
;
9765 /* [dcl.fct.default]
9767 Local variables shall not be used in default argument
9770 The keyword `this' shall not be used in a default argument of a
9772 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
9775 error ("default argument %qE uses local variable %qD", arg
, var
);
9776 return error_mark_node
;
9783 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9786 type_is_deprecated (tree type
)
9788 enum tree_code code
;
9789 if (TREE_DEPRECATED (type
))
9791 if (TYPE_NAME (type
)
9792 && TREE_DEPRECATED (TYPE_NAME (type
)))
9795 /* Do warn about using typedefs to a deprecated class. */
9796 if (TAGGED_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
9797 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
9799 code
= TREE_CODE (type
);
9801 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
9802 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
9803 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
9804 return type_is_deprecated (TREE_TYPE (type
));
9806 if (TYPE_PTRMEMFUNC_P (type
))
9807 return type_is_deprecated
9808 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
9813 /* Decode the list of parameter types for a function type.
9814 Given the list of things declared inside the parens,
9815 return a list of types.
9817 If this parameter does not end with an ellipsis, we append
9820 *PARMS is set to the chain of PARM_DECLs created. */
9823 grokparms (tree parmlist
, tree
*parms
)
9825 tree result
= NULL_TREE
;
9826 tree decls
= NULL_TREE
;
9830 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
9832 tree type
= NULL_TREE
;
9833 tree init
= TREE_PURPOSE (parm
);
9834 tree decl
= TREE_VALUE (parm
);
9837 if (parm
== void_list_node
)
9840 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
9843 type
= TREE_TYPE (decl
);
9844 if (VOID_TYPE_P (type
))
9846 if (same_type_p (type
, void_type_node
)
9847 && DECL_SELF_REFERENCE_P (type
)
9848 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
9849 /* this is a parmlist of `(void)', which is ok. */
9851 cxx_incomplete_type_error (decl
, type
);
9852 /* It's not a good idea to actually create parameters of
9853 type `void'; other parts of the compiler assume that a
9854 void type terminates the parameter list. */
9855 type
= error_mark_node
;
9856 TREE_TYPE (decl
) = error_mark_node
;
9859 if (type
!= error_mark_node
9860 && TYPE_FOR_JAVA (type
)
9861 && MAYBE_CLASS_TYPE_P (type
))
9863 error ("parameter %qD has Java class type", decl
);
9864 type
= error_mark_node
;
9865 TREE_TYPE (decl
) = error_mark_node
;
9869 if (type
!= error_mark_node
9870 && (errmsg
= targetm
.invalid_parameter_type (type
)))
9873 type
= error_mark_node
;
9874 TREE_TYPE (decl
) = error_mark_node
;
9877 if (type
!= error_mark_node
)
9879 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
9881 tree deptype
= type_is_deprecated (type
);
9883 warn_deprecated_use (deptype
, NULL_TREE
);
9886 /* Top-level qualifiers on the parameters are
9887 ignored for function types. */
9888 type
= cp_build_qualified_type (type
, 0);
9889 if (TREE_CODE (type
) == METHOD_TYPE
)
9891 error ("parameter %qD invalidly declared method type", decl
);
9892 type
= build_pointer_type (type
);
9893 TREE_TYPE (decl
) = type
;
9895 else if (abstract_virtuals_error (decl
, type
))
9896 any_error
= 1; /* Seems like a good idea. */
9897 else if (POINTER_TYPE_P (type
))
9899 /* [dcl.fct]/6, parameter types cannot contain pointers
9900 (references) to arrays of unknown bound. */
9901 tree t
= TREE_TYPE (type
);
9902 int ptr
= TYPE_PTR_P (type
);
9908 else if (TREE_CODE (t
) != ARRAY_TYPE
)
9910 else if (!TYPE_DOMAIN (t
))
9914 if (TREE_CODE (t
) == ARRAY_TYPE
)
9915 error ("parameter %qD includes %s to array of unknown "
9917 decl
, ptr
? "pointer" : "reference", t
);
9922 else if (init
&& !processing_template_decl
)
9923 init
= check_default_argument (decl
, init
);
9926 if (TREE_CODE (decl
) == PARM_DECL
9927 && FUNCTION_PARAMETER_PACK_P (decl
)
9928 && TREE_CHAIN (parm
)
9929 && TREE_CHAIN (parm
) != void_list_node
)
9930 error ("parameter packs must be at the end of the parameter list");
9932 TREE_CHAIN (decl
) = decls
;
9934 result
= tree_cons (init
, type
, result
);
9936 decls
= nreverse (decls
);
9937 result
= nreverse (result
);
9939 result
= chainon (result
, void_list_node
);
9946 /* D is a constructor or overloaded `operator='.
9948 Let T be the class in which D is declared. Then, this function
9951 -1 if D's is an ill-formed constructor or copy assignment operator
9952 whose first parameter is of type `T'.
9953 0 if D is not a copy constructor or copy assignment
9955 1 if D is a copy constructor or copy assignment operator whose
9956 first parameter is a reference to non-const qualified T.
9957 2 if D is a copy constructor or copy assignment operator whose
9958 first parameter is a reference to const qualified T.
9960 This function can be used as a predicate. Positive values indicate
9961 a copy constructor and nonzero values indicate a copy assignment
9965 copy_fn_p (const_tree d
)
9971 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
9973 if (TREE_CODE (d
) == TEMPLATE_DECL
9974 || (DECL_TEMPLATE_INFO (d
)
9975 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
9976 /* Instantiations of template member functions are never copy
9977 functions. Note that member functions of templated classes are
9978 represented as template functions internally, and we must
9979 accept those as copy functions. */
9982 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
9986 arg_type
= TREE_VALUE (args
);
9987 if (arg_type
== error_mark_node
)
9990 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
9992 /* Pass by value copy assignment operator. */
9995 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
9996 && !TYPE_REF_IS_RVALUE (arg_type
)
9997 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
9999 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
10005 args
= TREE_CHAIN (args
);
10007 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10008 /* There are more non-optional args. */
10014 /* D is a constructor or overloaded `operator='.
10016 Let T be the class in which D is declared. Then, this function
10017 returns true when D is a move constructor or move assignment
10018 operator, false otherwise. */
10021 move_fn_p (const_tree d
)
10025 bool result
= false;
10027 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10029 if (cxx_dialect
== cxx98
)
10030 /* There are no move constructors if we are in C++98 mode. */
10033 if (TREE_CODE (d
) == TEMPLATE_DECL
10034 || (DECL_TEMPLATE_INFO (d
)
10035 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10036 /* Instantiations of template member functions are never copy
10037 functions. Note that member functions of templated classes are
10038 represented as template functions internally, and we must
10039 accept those as copy functions. */
10042 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10046 arg_type
= TREE_VALUE (args
);
10047 if (arg_type
== error_mark_node
)
10050 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10051 && TYPE_REF_IS_RVALUE (arg_type
)
10052 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
10056 args
= TREE_CHAIN (args
);
10058 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10059 /* There are more non-optional args. */
10065 /* Remember any special properties of member function DECL. */
10068 grok_special_member_properties (tree decl
)
10072 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
10075 class_type
= DECL_CONTEXT (decl
);
10076 if (DECL_CONSTRUCTOR_P (decl
))
10078 int ctor
= copy_fn_p (decl
);
10080 if (!DECL_ARTIFICIAL (decl
))
10081 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
10087 A non-template constructor for class X is a copy
10088 constructor if its first parameter is of type X&, const
10089 X&, volatile X& or const volatile X&, and either there
10090 are no other parameters or else all other parameters have
10091 default arguments. */
10092 TYPE_HAS_INIT_REF (class_type
) = 1;
10093 if (user_provided_p (decl
))
10094 TYPE_HAS_COMPLEX_INIT_REF (class_type
) = 1;
10096 TYPE_HAS_CONST_INIT_REF (class_type
) = 1;
10098 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
10100 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
10101 if (user_provided_p (decl
))
10102 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
10104 else if (is_list_ctor (decl
))
10105 TYPE_HAS_LIST_CTOR (class_type
) = 1;
10107 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
10111 A non-template assignment operator for class X is a copy
10112 assignment operator if its parameter is of type X, X&, const
10113 X&, volatile X& or const volatile X&. */
10115 int assop
= copy_fn_p (decl
);
10119 TYPE_HAS_ASSIGN_REF (class_type
) = 1;
10120 if (user_provided_p (decl
))
10121 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type
) = 1;
10123 TYPE_HAS_CONST_ASSIGN_REF (class_type
) = 1;
10128 /* Check a constructor DECL has the correct form. Complains
10129 if the class has a constructor of the form X(X). */
10132 grok_ctor_properties (const_tree ctype
, const_tree decl
)
10134 int ctor_parm
= copy_fn_p (decl
);
10140 A declaration of a constructor for a class X is ill-formed if
10141 its first parameter is of type (optionally cv-qualified) X
10142 and either there are no other parameters or else all other
10143 parameters have default arguments.
10145 We *don't* complain about member template instantiations that
10146 have this form, though; they can occur as we try to decide
10147 what constructor to use during overload resolution. Since
10148 overload resolution will never prefer such a constructor to
10149 the non-template copy constructor (which is either explicitly
10150 or implicitly defined), there's no need to worry about their
10151 existence. Theoretically, they should never even be
10152 instantiated, but that's hard to forestall. */
10153 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10161 /* An operator with this code is unary, but can also be binary. */
10164 ambi_op_p (enum tree_code code
)
10166 return (code
== INDIRECT_REF
10167 || code
== ADDR_EXPR
10168 || code
== UNARY_PLUS_EXPR
10169 || code
== NEGATE_EXPR
10170 || code
== PREINCREMENT_EXPR
10171 || code
== PREDECREMENT_EXPR
);
10174 /* An operator with this name can only be unary. */
10177 unary_op_p (enum tree_code code
)
10179 return (code
== TRUTH_NOT_EXPR
10180 || code
== BIT_NOT_EXPR
10181 || code
== COMPONENT_REF
10182 || code
== TYPE_EXPR
);
10185 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10186 errors are issued for invalid declarations. */
10189 grok_op_properties (tree decl
, bool complain
)
10191 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
10193 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
10194 tree name
= DECL_NAME (decl
);
10195 enum tree_code operator_code
;
10200 /* Count the number of arguments and check for ellipsis. */
10201 for (argtype
= argtypes
, arity
= 0;
10202 argtype
&& argtype
!= void_list_node
;
10203 argtype
= TREE_CHAIN (argtype
))
10205 ellipsis_p
= !argtype
;
10207 class_type
= DECL_CONTEXT (decl
);
10208 if (class_type
&& !CLASS_TYPE_P (class_type
))
10209 class_type
= NULL_TREE
;
10211 if (DECL_CONV_FN_P (decl
))
10212 operator_code
= TYPE_EXPR
;
10216 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10217 if (ansi_opname (CODE) == name) \
10219 operator_code = (CODE); \
10222 else if (ansi_assopname (CODE) == name) \
10224 operator_code = (CODE); \
10225 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10229 #include "operators.def"
10230 #undef DEF_OPERATOR
10232 gcc_unreachable ();
10235 gcc_assert (operator_code
!= MAX_TREE_CODES
);
10236 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
10239 switch (operator_code
)
10242 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
10246 TYPE_GETS_DELETE (class_type
) |= 1;
10250 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
10253 case VEC_DELETE_EXPR
:
10254 TYPE_GETS_DELETE (class_type
) |= 2;
10261 /* [basic.std.dynamic.allocation]/1:
10263 A program is ill-formed if an allocation function is declared
10264 in a namespace scope other than global scope or declared static
10267 The same also holds true for deallocation functions. */
10268 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
10269 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
10271 if (DECL_NAMESPACE_SCOPE_P (decl
))
10273 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
10275 error ("%qD may not be declared within a namespace", decl
);
10278 else if (!TREE_PUBLIC (decl
))
10280 error ("%qD may not be declared as static", decl
);
10286 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
10288 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
10289 DECL_IS_OPERATOR_NEW (decl
) = 1;
10291 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
10292 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
10295 /* An operator function must either be a non-static member function
10296 or have at least one parameter of a class, a reference to a class,
10297 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10298 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
10300 if (operator_code
== TYPE_EXPR
10301 || operator_code
== CALL_EXPR
10302 || operator_code
== COMPONENT_REF
10303 || operator_code
== ARRAY_REF
10304 || operator_code
== NOP_EXPR
)
10306 if (class_type
&& LAMBDA_TYPE_P (class_type
))
10307 /* Lambdas can have static op() and conv ops. */;
10310 error ("%qD must be a nonstatic member function", decl
);
10318 if (DECL_STATIC_FUNCTION_P (decl
))
10320 error ("%qD must be either a non-static member "
10321 "function or a non-member function", decl
);
10325 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
10327 tree arg
= non_reference (TREE_VALUE (p
));
10328 if (arg
== error_mark_node
)
10331 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10332 because these checks are performed even on
10333 template functions. */
10334 if (MAYBE_CLASS_TYPE_P (arg
)
10335 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
10339 if (!p
|| p
== void_list_node
)
10342 error ("%qD must have an argument of class or "
10343 "enumerated type", decl
);
10349 /* There are no restrictions on the arguments to an overloaded
10351 if (operator_code
== CALL_EXPR
)
10354 /* Warn about conversion operators that will never be used. */
10355 if (IDENTIFIER_TYPENAME_P (name
)
10356 && ! DECL_TEMPLATE_INFO (decl
)
10358 /* Warn only declaring the function; there is no need to
10359 warn again about out-of-class definitions. */
10360 && class_type
== current_class_type
)
10362 tree t
= TREE_TYPE (name
);
10363 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
10364 const char *what
= 0;
10367 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
10369 if (TREE_CODE (t
) == VOID_TYPE
)
10371 else if (class_type
)
10373 if (t
== class_type
)
10374 what
= "the same type";
10375 /* Don't force t to be complete here. */
10376 else if (MAYBE_CLASS_TYPE_P (t
)
10377 && COMPLETE_TYPE_P (t
)
10378 && DERIVED_FROM_P (t
, class_type
))
10379 what
= "a base class";
10383 warning (OPT_Wconversion
, "conversion to %s%s will never use a type "
10384 "conversion operator",
10385 ref
? "a reference to " : "", what
);
10388 if (operator_code
== COND_EXPR
)
10391 error ("ISO C++ prohibits overloading operator ?:");
10394 else if (ellipsis_p
)
10396 error ("%qD must not have variable number of arguments", decl
);
10399 else if (ambi_op_p (operator_code
))
10402 /* We pick the one-argument operator codes by default, so
10403 we don't have to change anything. */
10405 else if (arity
== 2)
10407 /* If we thought this was a unary operator, we now know
10408 it to be a binary operator. */
10409 switch (operator_code
)
10412 operator_code
= MULT_EXPR
;
10416 operator_code
= BIT_AND_EXPR
;
10419 case UNARY_PLUS_EXPR
:
10420 operator_code
= PLUS_EXPR
;
10424 operator_code
= MINUS_EXPR
;
10427 case PREINCREMENT_EXPR
:
10428 operator_code
= POSTINCREMENT_EXPR
;
10431 case PREDECREMENT_EXPR
:
10432 operator_code
= POSTDECREMENT_EXPR
;
10436 gcc_unreachable ();
10439 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
10441 if ((operator_code
== POSTINCREMENT_EXPR
10442 || operator_code
== POSTDECREMENT_EXPR
)
10443 && ! processing_template_decl
10444 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
10447 error ("postfix %qD must take %<int%> as its argument",
10450 error ("postfix %qD must take %<int%> as its second "
10458 error ("%qD must take either zero or one argument", decl
);
10460 error ("%qD must take either one or two arguments", decl
);
10464 /* More Effective C++ rule 6. */
10466 && (operator_code
== POSTINCREMENT_EXPR
10467 || operator_code
== POSTDECREMENT_EXPR
10468 || operator_code
== PREINCREMENT_EXPR
10469 || operator_code
== PREDECREMENT_EXPR
))
10471 tree arg
= TREE_VALUE (argtypes
);
10472 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
10473 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
10474 arg
= TREE_TYPE (arg
);
10475 arg
= TYPE_MAIN_VARIANT (arg
);
10476 if (operator_code
== PREINCREMENT_EXPR
10477 || operator_code
== PREDECREMENT_EXPR
)
10479 if (TREE_CODE (ret
) != REFERENCE_TYPE
10480 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
10482 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
10483 build_reference_type (arg
));
10487 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
10488 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
10492 else if (unary_op_p (operator_code
))
10497 error ("%qD must take %<void%>", decl
);
10499 error ("%qD must take exactly one argument", decl
);
10503 else /* if (binary_op_p (operator_code)) */
10508 error ("%qD must take exactly one argument", decl
);
10510 error ("%qD must take exactly two arguments", decl
);
10514 /* More Effective C++ rule 7. */
10516 && (operator_code
== TRUTH_ANDIF_EXPR
10517 || operator_code
== TRUTH_ORIF_EXPR
10518 || operator_code
== COMPOUND_EXPR
))
10519 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
10523 /* Effective C++ rule 23. */
10526 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
10527 && (operator_code
== PLUS_EXPR
10528 || operator_code
== MINUS_EXPR
10529 || operator_code
== TRUNC_DIV_EXPR
10530 || operator_code
== MULT_EXPR
10531 || operator_code
== TRUNC_MOD_EXPR
)
10532 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
10533 warning (OPT_Weffc__
, "%qD should return by value", decl
);
10535 /* [over.oper]/8 */
10536 for (; argtypes
&& argtypes
!= void_list_node
;
10537 argtypes
= TREE_CHAIN (argtypes
))
10538 if (TREE_PURPOSE (argtypes
))
10540 TREE_PURPOSE (argtypes
) = NULL_TREE
;
10541 if (operator_code
== POSTINCREMENT_EXPR
10542 || operator_code
== POSTDECREMENT_EXPR
)
10544 pedwarn (input_location
, OPT_pedantic
, "%qD cannot have default arguments",
10549 error ("%qD cannot have default arguments", decl
);
10557 /* Return a string giving the keyword associate with CODE. */
10559 static const char *
10560 tag_name (enum tag_types code
)
10572 case typename_type
:
10575 gcc_unreachable ();
10579 /* Name lookup in an elaborated-type-specifier (after the keyword
10580 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10581 elaborated-type-specifier is invalid, issue a diagnostic and return
10582 error_mark_node; otherwise, return the *_TYPE to which it referred.
10583 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10586 check_elaborated_type_specifier (enum tag_types tag_code
,
10588 bool allow_template_p
)
10594 struct S { struct S *p; };
10596 name lookup will find the TYPE_DECL for the implicit "S::S"
10597 typedef. Adjust for that here. */
10598 if (DECL_SELF_REFERENCE_P (decl
))
10599 decl
= TYPE_NAME (TREE_TYPE (decl
));
10601 type
= TREE_TYPE (decl
);
10603 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10604 is false for this case as well. */
10605 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10607 error ("using template type parameter %qT after %qs",
10608 type
, tag_name (tag_code
));
10609 return error_mark_node
;
10613 If the identifier resolves to a typedef-name or a template
10614 type-parameter, the elaborated-type-specifier is ill-formed.
10616 In other words, the only legitimate declaration to use in the
10617 elaborated type specifier is the implicit typedef created when
10618 the type is declared. */
10619 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
10620 && !DECL_SELF_REFERENCE_P (decl
)
10621 && tag_code
!= typename_type
)
10623 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
10624 error ("%q+D has a previous declaration here", decl
);
10625 return error_mark_node
;
10627 else if (TREE_CODE (type
) != RECORD_TYPE
10628 && TREE_CODE (type
) != UNION_TYPE
10629 && tag_code
!= enum_type
10630 && tag_code
!= typename_type
)
10632 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
10633 error ("%q+T has a previous declaration here", type
);
10634 return error_mark_node
;
10636 else if (TREE_CODE (type
) != ENUMERAL_TYPE
10637 && tag_code
== enum_type
)
10639 error ("%qT referred to as enum", type
);
10640 error ("%q+T has a previous declaration here", type
);
10641 return error_mark_node
;
10643 else if (!allow_template_p
10644 && TREE_CODE (type
) == RECORD_TYPE
10645 && CLASSTYPE_IS_TEMPLATE (type
))
10647 /* If a class template appears as elaborated type specifier
10648 without a template header such as:
10650 template <class T> class C {};
10651 void f(class C); // No template header here
10653 then the required template argument is missing. */
10654 error ("template argument required for %<%s %T%>",
10655 tag_name (tag_code
),
10656 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
10657 return error_mark_node
;
10663 /* Lookup NAME in elaborate type specifier in scope according to
10664 SCOPE and issue diagnostics if necessary.
10665 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10666 found, and ERROR_MARK_NODE for type error. */
10669 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
10670 tag_scope scope
, bool template_header_p
)
10674 if (scope
== ts_global
)
10676 /* First try ordinary name lookup, ignoring hidden class name
10677 injected via friend declaration. */
10678 decl
= lookup_name_prefer_type (name
, 2);
10679 /* If that fails, the name will be placed in the smallest
10680 non-class, non-function-prototype scope according to 3.3.1/5.
10681 We may already have a hidden name declared as friend in this
10682 scope. So lookup again but not ignoring hidden names.
10683 If we find one, that name will be made visible rather than
10684 creating a new tag. */
10686 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
10689 decl
= lookup_type_scope (name
, scope
);
10691 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
10692 decl
= DECL_TEMPLATE_RESULT (decl
);
10694 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
10696 /* Look for invalid nested type:
10700 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
10702 error ("%qD has the same name as the class in which it is "
10705 return error_mark_node
;
10708 /* Two cases we need to consider when deciding if a class
10709 template is allowed as an elaborated type specifier:
10710 1. It is a self reference to its own class.
10711 2. It comes with a template header.
10715 template <class T> class C {
10716 class C *c1; // DECL_SELF_REFERENCE_P is true
10719 template <class U> class C; // template_header_p is true
10720 template <class T> class C<T>::D {
10721 class C *c2; // DECL_SELF_REFERENCE_P is true
10724 t
= check_elaborated_type_specifier (tag_code
,
10727 | DECL_SELF_REFERENCE_P (decl
));
10730 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
10732 error ("reference to %qD is ambiguous", name
);
10733 print_candidates (decl
);
10734 return error_mark_node
;
10740 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10741 Define the tag as a forward-reference if it is not defined.
10743 If a declaration is given, process it here, and report an error if
10744 multiple declarations are not identical.
10746 SCOPE is TS_CURRENT when this is also a definition. Only look in
10747 the current frame for the name (since C++ allows new names in any
10748 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10749 declaration. Only look beginning from the current scope outward up
10750 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10752 TEMPLATE_HEADER_P is true when this declaration is preceded by
10753 a set of template parameters. */
10756 xref_tag (enum tag_types tag_code
, tree name
,
10757 tag_scope scope
, bool template_header_p
)
10759 enum tree_code code
;
10761 tree context
= NULL_TREE
;
10763 timevar_push (TV_NAME_LOOKUP
);
10765 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
10771 code
= RECORD_TYPE
;
10777 code
= ENUMERAL_TYPE
;
10780 gcc_unreachable ();
10783 /* In case of anonymous name, xref_tag is only called to
10784 make type node and push name. Name lookup is not required. */
10785 if (ANON_AGGRNAME_P (name
))
10788 t
= lookup_and_check_tag (tag_code
, name
,
10789 scope
, template_header_p
);
10791 if (t
== error_mark_node
)
10792 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10794 if (scope
!= ts_current
&& t
&& current_class_type
10795 && template_class_depth (current_class_type
)
10796 && template_header_p
)
10798 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10799 definition of this tag. Since, in addition, we are currently
10800 processing a (member) template declaration of a template
10801 class, we must be very careful; consider:
10808 { template <class V>
10809 friend struct S1; };
10811 Here, the S2::S1 declaration should not be confused with the
10812 outer declaration. In particular, the inner version should
10813 have a template parameter of level 2, not level 1. This
10814 would be particularly important if the member declaration
10817 template <class V = U> friend struct S1;
10819 say, when we should tsubst into `U' when instantiating
10820 S2. On the other hand, when presented with:
10830 we must find the inner binding eventually. We
10831 accomplish this by making sure that the new type we
10832 create to represent this declaration has the right
10834 context
= TYPE_CONTEXT (t
);
10840 /* If no such tag is yet defined, create a forward-reference node
10841 and record it as the "definition".
10842 When a real declaration of this type is found,
10843 the forward-reference will be altered into a real type. */
10844 if (code
== ENUMERAL_TYPE
)
10846 error ("use of enum %q#D without previous declaration", name
);
10847 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10851 t
= make_class_type (code
);
10852 TYPE_CONTEXT (t
) = context
;
10853 t
= pushtag (name
, t
, scope
);
10858 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
10860 if (!redeclare_class_template (t
, current_template_parms
))
10861 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10863 else if (!processing_template_decl
10864 && CLASS_TYPE_P (t
)
10865 && CLASSTYPE_IS_TEMPLATE (t
))
10867 error ("redeclaration of %qT as a non-template", t
);
10868 error ("previous declaration %q+D", t
);
10869 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10872 /* Make injected friend class visible. */
10873 if (scope
!= ts_within_enclosing_non_class
10874 && hidden_name_p (TYPE_NAME (t
)))
10876 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
10877 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
10879 if (TYPE_TEMPLATE_INFO (t
))
10881 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
10882 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
10887 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, t
);
10891 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
10893 enum tag_types tag_kind
;
10895 if (TREE_CODE (old
) == RECORD_TYPE
)
10896 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
10898 tag_kind
= union_type
;
10900 if (id
== NULL_TREE
)
10901 id
= TYPE_IDENTIFIER (old
);
10903 return xref_tag (tag_kind
, id
, scope
, false);
10906 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10907 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10908 access_* node, and the TREE_VALUE is the type of the base-class.
10909 Non-NULL TREE_TYPE indicates virtual inheritance.
10911 Returns true if the binfo hierarchy was successfully created,
10912 false if an error was detected. */
10915 xref_basetypes (tree ref
, tree base_list
)
10918 tree binfo
, base_binfo
;
10919 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
10920 unsigned max_bases
= 0; /* Maximum direct bases. */
10922 tree default_access
;
10923 tree igo_prev
; /* Track Inheritance Graph Order. */
10925 if (ref
== error_mark_node
)
10928 /* The base of a derived class is private by default, all others are
10930 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
10931 && CLASSTYPE_DECLARED_CLASS (ref
)
10932 ? access_private_node
: access_public_node
);
10934 /* First, make sure that any templates in base-classes are
10935 instantiated. This ensures that if we call ourselves recursively
10936 we do not get confused about which classes are marked and which
10938 basep
= &base_list
;
10941 tree basetype
= TREE_VALUE (*basep
);
10943 if (!(processing_template_decl
&& uses_template_parms (basetype
))
10944 && !complete_type_or_else (basetype
, NULL
))
10945 /* An incomplete type. Remove it from the list. */
10946 *basep
= TREE_CHAIN (*basep
);
10950 if (TREE_TYPE (*basep
))
10952 if (CLASS_TYPE_P (basetype
))
10953 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
10954 basep
= &TREE_CHAIN (*basep
);
10958 TYPE_MARKED_P (ref
) = 1;
10960 /* The binfo slot should be empty, unless this is an (ill-formed)
10962 gcc_assert (!TYPE_BINFO (ref
) || TYPE_SIZE (ref
));
10963 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
10965 binfo
= make_tree_binfo (max_bases
);
10967 TYPE_BINFO (ref
) = binfo
;
10968 BINFO_OFFSET (binfo
) = size_zero_node
;
10969 BINFO_TYPE (binfo
) = ref
;
10971 /* Apply base-class info set up to the variants of this type. */
10972 fixup_type_variants (ref
);
10976 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
10977 /* An aggregate cannot have baseclasses. */
10978 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
10980 if (TREE_CODE (ref
) == UNION_TYPE
)
10982 error ("derived union %qT invalid", ref
);
10989 if (TYPE_FOR_JAVA (ref
))
10991 error ("Java class %qT cannot have multiple bases", ref
);
10998 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
11000 if (TYPE_FOR_JAVA (ref
))
11002 error ("Java class %qT cannot have virtual bases", ref
);
11007 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
11009 tree access
= TREE_PURPOSE (base_list
);
11010 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
11011 tree basetype
= TREE_VALUE (base_list
);
11013 if (access
== access_default_node
)
11014 access
= default_access
;
11016 if (PACK_EXPANSION_P (basetype
))
11017 basetype
= PACK_EXPANSION_PATTERN (basetype
);
11018 if (TREE_CODE (basetype
) == TYPE_DECL
)
11019 basetype
= TREE_TYPE (basetype
);
11020 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
11022 error ("base type %qT fails to be a struct or class type",
11027 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
11028 TYPE_FOR_JAVA (ref
) = 1;
11030 base_binfo
= NULL_TREE
;
11031 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
11033 base_binfo
= TYPE_BINFO (basetype
);
11034 /* The original basetype could have been a typedef'd type. */
11035 basetype
= BINFO_TYPE (base_binfo
);
11037 /* Inherit flags from the base. */
11038 TYPE_HAS_NEW_OPERATOR (ref
)
11039 |= TYPE_HAS_NEW_OPERATOR (basetype
);
11040 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
11041 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
11042 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
11043 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
11044 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
11045 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
11046 CLASSTYPE_REPEATED_BASE_P (ref
)
11047 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
11050 /* We must do this test after we've seen through a typedef
11052 if (TYPE_MARKED_P (basetype
))
11054 if (basetype
== ref
)
11055 error ("recursive type %qT undefined", basetype
);
11057 error ("duplicate base type %qT invalid", basetype
);
11061 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
11062 /* Regenerate the pack expansion for the bases. */
11063 basetype
= make_pack_expansion (basetype
);
11065 TYPE_MARKED_P (basetype
) = 1;
11067 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
11068 &igo_prev
, via_virtual
);
11069 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
11070 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
11072 BINFO_BASE_APPEND (binfo
, base_binfo
);
11073 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
11076 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
11077 /* If we have space in the vbase vector, we must have shared at
11078 least one of them, and are therefore diamond shaped. */
11079 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
11081 /* Unmark all the types. */
11082 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
11083 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11084 TYPE_MARKED_P (ref
) = 0;
11086 /* Now see if we have a repeated base type. */
11087 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
11089 for (base_binfo
= binfo
; base_binfo
;
11090 base_binfo
= TREE_CHAIN (base_binfo
))
11092 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11094 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
11097 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
11099 for (base_binfo
= binfo
; base_binfo
;
11100 base_binfo
= TREE_CHAIN (base_binfo
))
11101 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11102 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11111 /* Begin compiling the definition of an enumeration type.
11114 UNDERLYING_TYPE is the type that will be used as the storage for
11115 the enumeration type. This should be NULL_TREE if no storage type
11118 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11120 Returns the type object, as yet incomplete.
11121 Also records info about it so that build_enumerator
11122 may be used to declare the individual values as they are read. */
11125 start_enum (tree name
, tree underlying_type
, bool scoped_enum_p
)
11129 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11131 /* If this is the real definition for a previous forward reference,
11132 fill in the contents in the same object that used to be the
11133 forward reference. */
11135 enumtype
= lookup_and_check_tag (enum_type
, name
,
11136 /*tag_scope=*/ts_current
,
11137 /*template_header_p=*/false);
11139 if (enumtype
!= NULL_TREE
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
11141 error_at (input_location
, "multiple definition of %q#T", enumtype
);
11142 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
11143 "previous definition here");
11144 /* Clear out TYPE_VALUES, and start again. */
11145 TYPE_VALUES (enumtype
) = NULL_TREE
;
11149 /* In case of error, make a dummy enum to allow parsing to
11151 if (enumtype
== error_mark_node
)
11152 name
= make_anon_name ();
11154 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
11155 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
11158 if (enumtype
== error_mark_node
)
11163 SET_SCOPED_ENUM_P (enumtype
, 1);
11164 begin_scope (sk_scoped_enum
, enumtype
);
11166 /* [C++0x dcl.enum]p5:
11168 If not explicitly specified, the underlying type of a scoped
11169 enumeration type is int. */
11170 if (!underlying_type
)
11171 underlying_type
= integer_type_node
;
11174 if (underlying_type
)
11176 if (CP_INTEGRAL_TYPE_P (underlying_type
))
11178 TYPE_MIN_VALUE (enumtype
) = TYPE_MIN_VALUE (underlying_type
);
11179 TYPE_MAX_VALUE (enumtype
) = TYPE_MAX_VALUE (underlying_type
);
11180 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
11181 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
11182 SET_TYPE_MODE (enumtype
, TYPE_MODE (underlying_type
));
11183 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (underlying_type
);
11184 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
11185 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
11186 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
11187 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
11189 else if (!dependent_type_p (underlying_type
))
11190 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11191 underlying_type
, enumtype
);
11197 /* After processing and defining all the values of an enumeration type,
11198 install their decls in the enumeration type and finish it off.
11199 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11202 finish_enum (tree enumtype
)
11211 bool use_short_enum
;
11216 tree underlying_type
= NULL_TREE
;
11217 bool fixed_underlying_type_p
11218 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
11220 /* We built up the VALUES in reverse order. */
11221 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
11223 /* For an enum defined in a template, just set the type of the values;
11224 all further processing is postponed until the template is
11225 instantiated. We need to set the type so that tsubst of a CONST_DECL
11227 if (processing_template_decl
)
11229 for (values
= TYPE_VALUES (enumtype
);
11231 values
= TREE_CHAIN (values
))
11232 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
11233 if (at_function_scope_p ())
11234 add_stmt (build_min (TAG_DEFN
, enumtype
));
11235 if (SCOPED_ENUM_P (enumtype
))
11240 /* Determine the minimum and maximum values of the enumerators. */
11241 if (TYPE_VALUES (enumtype
))
11243 minnode
= maxnode
= NULL_TREE
;
11245 for (values
= TYPE_VALUES (enumtype
);
11247 values
= TREE_CHAIN (values
))
11249 decl
= TREE_VALUE (values
);
11251 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11252 each enumerator has the type of its enumeration. Prior to the
11253 closing brace, the type of each enumerator is the type of its
11254 initializing value. */
11255 TREE_TYPE (decl
) = enumtype
;
11257 /* Update the minimum and maximum values, if appropriate. */
11258 value
= DECL_INITIAL (decl
);
11259 if (value
== error_mark_node
)
11260 value
= integer_zero_node
;
11261 /* Figure out what the minimum and maximum values of the
11262 enumerators are. */
11264 minnode
= maxnode
= value
;
11265 else if (tree_int_cst_lt (maxnode
, value
))
11267 else if (tree_int_cst_lt (value
, minnode
))
11274 If the enumerator-list is empty, the underlying type is as if
11275 the enumeration had a single enumerator with value 0. */
11276 minnode
= maxnode
= integer_zero_node
;
11278 /* Compute the number of bits require to represent all values of the
11279 enumeration. We must do this before the type of MINNODE and
11280 MAXNODE are transformed, since tree_int_cst_min_precision relies
11281 on the TREE_TYPE of the value it is passed. */
11282 unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
11283 lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
11284 highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
11285 precision
= MAX (lowprec
, highprec
);
11287 if (!fixed_underlying_type_p
)
11289 /* Determine the underlying type of the enumeration.
11293 The underlying type of an enumeration is an integral type that
11294 can represent all the enumerator values defined in the
11295 enumeration. It is implementation-defined which integral type is
11296 used as the underlying type for an enumeration except that the
11297 underlying type shall not be larger than int unless the value of
11298 an enumerator cannot fit in an int or unsigned int.
11300 We use "int" or an "unsigned int" as the underlying type, even if
11301 a smaller integral type would work, unless the user has
11302 explicitly requested that we use the smallest possible type. The
11303 user can request that for all enumerations with a command line
11304 flag, or for just one enumeration with an attribute. */
11306 use_short_enum
= flag_short_enums
11307 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
11309 for (itk
= (use_short_enum
? itk_char
: itk_int
);
11313 underlying_type
= integer_types
[itk
];
11314 if (TYPE_PRECISION (underlying_type
) >= precision
11315 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
11318 if (itk
== itk_none
)
11322 IF no integral type can represent all the enumerator values, the
11323 enumeration is ill-formed. */
11324 error ("no integral type can represent all of the enumerator values "
11325 "for %qT", enumtype
);
11326 precision
= TYPE_PRECISION (long_long_integer_type_node
);
11327 underlying_type
= integer_types
[itk_unsigned_long_long
];
11332 The value of sizeof() applied to an enumeration type, an object
11333 of an enumeration type, or an enumerator, is the value of sizeof()
11334 applied to the underlying type. */
11335 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
11336 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
11337 SET_TYPE_MODE (enumtype
, TYPE_MODE (underlying_type
));
11338 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
11339 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
11340 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
11342 /* Set the underlying type of the enumeration type to the
11343 computed enumeration type, restricted to the enumerator
11345 ENUM_UNDERLYING_TYPE (enumtype
)
11346 = build_distinct_type_copy (underlying_type
);
11347 set_min_and_max_values_for_integral_type
11348 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
11351 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
11353 /* Compute the minimum and maximum values for the type.
11357 For an enumeration where emin is the smallest enumerator and emax
11358 is the largest, the values of the enumeration are the values of the
11359 underlying type in the range bmin to bmax, where bmin and bmax are,
11360 respectively, the smallest and largest values of the smallest bit-
11361 field that can store emin and emax. */
11363 /* The middle-end currently assumes that types with TYPE_PRECISION
11364 narrower than their underlying type are suitably zero or sign
11365 extended to fill their mode. g++ doesn't make these guarantees.
11366 Until the middle-end can represent such paradoxical types, we
11367 set the TYPE_PRECISION to the width of the underlying type. */
11368 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (underlying_type
);
11370 set_min_and_max_values_for_integral_type (enumtype
, precision
, unsignedp
);
11372 /* Convert each of the enumerators to the type of the underlying
11373 type of the enumeration. */
11374 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
11376 location_t saved_location
;
11378 decl
= TREE_VALUE (values
);
11379 saved_location
= input_location
;
11380 input_location
= DECL_SOURCE_LOCATION (decl
);
11381 if (fixed_underlying_type_p
)
11382 /* If the enumeration type has a fixed underlying type, we
11383 already checked all of the enumerator values. */
11384 value
= DECL_INITIAL (decl
);
11386 value
= perform_implicit_conversion (underlying_type
,
11387 DECL_INITIAL (decl
),
11388 tf_warning_or_error
);
11389 input_location
= saved_location
;
11391 /* Do not clobber shared ints. */
11392 value
= copy_node (value
);
11394 TREE_TYPE (value
) = enumtype
;
11395 DECL_INITIAL (decl
) = value
;
11398 /* Fix up all variant types of this enum type. */
11399 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
11401 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
11402 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (enumtype
);
11403 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (enumtype
);
11404 TYPE_SIZE (t
) = TYPE_SIZE (enumtype
);
11405 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (enumtype
);
11406 SET_TYPE_MODE (t
, TYPE_MODE (enumtype
));
11407 TYPE_PRECISION (t
) = TYPE_PRECISION (enumtype
);
11408 TYPE_ALIGN (t
) = TYPE_ALIGN (enumtype
);
11409 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (enumtype
);
11410 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (enumtype
);
11411 ENUM_UNDERLYING_TYPE (t
) = ENUM_UNDERLYING_TYPE (enumtype
);
11414 /* Finish up the scope of a scoped enumeration. */
11415 if (SCOPED_ENUM_P (enumtype
))
11418 /* Finish debugging output for this type. */
11419 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
11422 /* Build and install a CONST_DECL for an enumeration constant of the
11423 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11424 Assignment of sequential values by default is handled here. */
11427 build_enumerator (tree name
, tree value
, tree enumtype
)
11433 /* If the VALUE was erroneous, pretend it wasn't there; that will
11434 result in the enum being assigned the next value in sequence. */
11435 if (value
== error_mark_node
)
11438 /* Remove no-op casts from the value. */
11440 STRIP_TYPE_NOPS (value
);
11442 if (! processing_template_decl
)
11444 /* Validate and default VALUE. */
11445 if (value
!= NULL_TREE
)
11447 value
= integral_constant_value (value
);
11449 if (TREE_CODE (value
) == INTEGER_CST
)
11451 value
= perform_integral_promotions (value
);
11452 constant_expression_warning (value
);
11456 error ("enumerator value for %qD is not an integer constant", name
);
11461 /* Default based on previous value. */
11462 if (value
== NULL_TREE
)
11464 if (TYPE_VALUES (enumtype
))
11467 unsigned HOST_WIDE_INT lo
;
11471 /* The next value is the previous value plus one.
11472 add_double doesn't know the type of the target expression,
11473 so we must check with int_fits_type_p as well. */
11474 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
11475 if (error_operand_p (prev_value
))
11476 value
= error_mark_node
;
11479 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
11480 TREE_INT_CST_HIGH (prev_value
),
11482 value
= build_int_cst_wide (TREE_TYPE (prev_value
), lo
, hi
);
11484 |= !int_fits_type_p (value
, TREE_TYPE (prev_value
));
11488 error ("overflow in enumeration values at %qD", name
);
11489 value
= error_mark_node
;
11494 value
= integer_zero_node
;
11497 /* Remove no-op casts from the value. */
11498 STRIP_TYPE_NOPS (value
);
11500 /* If the underlying type of the enum is fixed, check whether
11501 the enumerator values fits in the underlying type. If it
11502 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11503 if (ENUM_UNDERLYING_TYPE (enumtype
)
11505 && TREE_CODE (value
) == INTEGER_CST
11506 && !int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
11508 error ("enumerator value %E is too large for underlying type %<%T%>",
11509 value
, ENUM_UNDERLYING_TYPE (enumtype
));
11511 /* Silently convert the value so that we can continue. */
11512 value
= perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype
),
11517 /* C++ associates enums with global, function, or class declarations. */
11518 context
= current_scope ();
11520 /* Build the actual enumeration constant. Note that the enumeration
11521 constants have the underlying type of the enum (if it is fixed)
11522 or the type of their initializer (if the underlying type of the
11523 enum is not fixed):
11527 If the underlying type is fixed, the type of each enumerator
11528 prior to the closing brace is the underlying type; if the
11529 initializing value of an enumerator cannot be represented by
11530 the underlying type, the program is ill-formed. If the
11531 underlying type is not fixed, the type of each enumerator is
11532 the type of its initializing value.
11534 If the underlying type is not fixed, it will be computed by
11535 finish_enum and we will reset the type of this enumerator. Of
11536 course, if we're processing a template, there may be no value. */
11537 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
11539 if (context
&& context
== current_class_type
)
11540 /* This enum declaration is local to the class. We need the full
11541 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11542 decl
= build_lang_decl (CONST_DECL
, name
, type
);
11544 /* It's a global enum, or it's local to a function. (Note local to
11545 a function could mean local to a class method. */
11546 decl
= build_decl (input_location
, CONST_DECL
, name
, type
);
11548 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
11549 TREE_CONSTANT (decl
) = 1;
11550 TREE_READONLY (decl
) = 1;
11551 DECL_INITIAL (decl
) = value
;
11553 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
11554 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11555 on the TYPE_FIELDS list for `S'. (That's so that you can say
11556 things like `S::i' later.) */
11557 finish_member_declaration (decl
);
11561 /* Add this enumeration constant to the list for this type. */
11562 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
11565 /* Look for an enumerator with the given NAME within the enumeration
11566 type ENUMTYPE. This routine is used primarily for qualified name
11567 lookup into an enumerator in C++0x, e.g.,
11569 enum class Color { Red, Green, Blue };
11571 Color color = Color::Red;
11573 Returns the value corresponding to the enumerator, or
11574 NULL_TREE if no such enumerator was found. */
11576 lookup_enumerator (tree enumtype
, tree name
)
11579 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
11581 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
11582 return e
? TREE_VALUE (e
) : NULL_TREE
;
11586 /* We're defining DECL. Make sure that its type is OK. */
11589 check_function_type (tree decl
, tree current_function_parms
)
11591 tree fntype
= TREE_TYPE (decl
);
11592 tree return_type
= complete_type (TREE_TYPE (fntype
));
11594 /* In a function definition, arg types must be complete. */
11595 require_complete_types_for_parms (current_function_parms
);
11597 /* constexpr functions must have literal argument types and
11598 literal return type. */
11599 validate_constexpr_fundecl (decl
);
11601 if (dependent_type_p (return_type
))
11603 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
11604 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
11606 tree args
= TYPE_ARG_TYPES (fntype
);
11608 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
11609 error ("return type %q#T is incomplete", return_type
);
11611 error ("return type has Java class type %q#T", return_type
);
11613 /* Make it return void instead. */
11614 if (TREE_CODE (fntype
) == METHOD_TYPE
)
11615 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
11617 TREE_CHAIN (args
));
11619 fntype
= build_function_type (void_type_node
, args
);
11621 = build_exception_variant (fntype
,
11622 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
11623 fntype
= (cp_build_type_attribute_variant
11624 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
11625 TREE_TYPE (decl
) = fntype
;
11628 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
11631 /* Create the FUNCTION_DECL for a function definition.
11632 DECLSPECS and DECLARATOR are the parts of the declaration;
11633 they describe the function's name and the type it returns,
11634 but twisted together in a fashion that parallels the syntax of C.
11636 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11637 DECLARATOR is really the DECL for the function we are about to
11638 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11639 indicating that the function is an inline defined in-class.
11641 This function creates a binding context for the function body
11642 as well as setting up the FUNCTION_DECL in current_function_decl.
11644 For C++, we must first check whether that datum makes any sense.
11645 For example, "class A local_a(1,2);" means that variable local_a
11646 is an aggregate of type A, which should have a constructor
11647 applied to it with the argument list [1, 2].
11649 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11650 or may be a BLOCK if the function has been defined previously
11651 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11652 error_mark_node if the function has never been defined, or
11653 a BLOCK if the function has been defined somewhere. */
11656 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
11658 tree ctype
= NULL_TREE
;
11661 int doing_friend
= 0;
11662 struct cp_binding_level
*bl
;
11663 tree current_function_parms
;
11664 struct c_fileinfo
*finfo
11665 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
11666 bool honor_interface
;
11668 /* Sanity check. */
11669 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
11670 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
11672 fntype
= TREE_TYPE (decl1
);
11673 if (TREE_CODE (fntype
) == METHOD_TYPE
)
11674 ctype
= TYPE_METHOD_BASETYPE (fntype
);
11676 /* ISO C++ 11.4/5. A friend function defined in a class is in
11677 the (lexical) scope of the class in which it is defined. */
11678 if (!ctype
&& DECL_FRIEND_P (decl1
))
11680 ctype
= DECL_FRIEND_CONTEXT (decl1
);
11682 /* CTYPE could be null here if we're dealing with a template;
11683 for example, `inline friend float foo()' inside a template
11684 will have no CTYPE set. */
11685 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
11691 if (DECL_DECLARED_INLINE_P (decl1
)
11692 && lookup_attribute ("noinline", attrs
))
11693 warning (0, "inline function %q+D given attribute noinline", decl1
);
11695 /* Handle gnu_inline attribute. */
11696 if (GNU_INLINE_P (decl1
))
11698 DECL_EXTERNAL (decl1
) = 1;
11699 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
11700 DECL_INTERFACE_KNOWN (decl1
) = 1;
11701 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
11704 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
11705 /* This is a constructor, we must ensure that any default args
11706 introduced by this definition are propagated to the clones
11707 now. The clones are used directly in overload resolution. */
11708 adjust_clone_args (decl1
);
11710 /* Sometimes we don't notice that a function is a static member, and
11711 build a METHOD_TYPE for it. Fix that up now. */
11712 if (ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
11713 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
)
11715 revert_static_member_fn (decl1
);
11719 /* Set up current_class_type, and enter the scope of the class, if
11722 push_nested_class (ctype
);
11723 else if (DECL_STATIC_FUNCTION_P (decl1
))
11724 push_nested_class (DECL_CONTEXT (decl1
));
11726 /* Now that we have entered the scope of the class, we must restore
11727 the bindings for any template parameters surrounding DECL1, if it
11728 is an inline member template. (Order is important; consider the
11729 case where a template parameter has the same name as a field of
11730 the class.) It is not until after this point that
11731 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11732 if (flags
& SF_INCLASS_INLINE
)
11733 maybe_begin_member_template_processing (decl1
);
11735 /* Effective C++ rule 15. */
11737 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
11738 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
11739 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
11741 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11742 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11743 if (!DECL_INITIAL (decl1
))
11744 DECL_INITIAL (decl1
) = error_mark_node
;
11746 /* This function exists in static storage.
11747 (This does not mean `static' in the C sense!) */
11748 TREE_STATIC (decl1
) = 1;
11750 /* We must call push_template_decl after current_class_type is set
11751 up. (If we are processing inline definitions after exiting a
11752 class scope, current_class_type will be NULL_TREE until set above
11753 by push_nested_class.) */
11754 if (processing_template_decl
)
11756 /* FIXME: Handle error_mark_node more gracefully. */
11757 tree newdecl1
= push_template_decl (decl1
);
11758 if (newdecl1
!= error_mark_node
)
11762 /* We are now in the scope of the function being defined. */
11763 current_function_decl
= decl1
;
11765 /* Save the parm names or decls from this function's declarator
11766 where store_parm_decls will find them. */
11767 current_function_parms
= DECL_ARGUMENTS (decl1
);
11769 /* Make sure the parameter and return types are reasonable. When
11770 you declare a function, these types can be incomplete, but they
11771 must be complete when you define the function. */
11772 check_function_type (decl1
, current_function_parms
);
11774 /* Build the return declaration for the function. */
11775 restype
= TREE_TYPE (fntype
);
11776 if (DECL_RESULT (decl1
) == NULL_TREE
)
11780 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
11781 DECL_ARTIFICIAL (resdecl
) = 1;
11782 DECL_IGNORED_P (resdecl
) = 1;
11783 DECL_RESULT (decl1
) = resdecl
;
11785 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
11788 /* Let the user know we're compiling this function. */
11789 announce_function (decl1
);
11791 /* Record the decl so that the function name is defined.
11792 If we already have a decl for this name, and it is a FUNCTION_DECL,
11793 use the old decl. */
11794 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
11796 /* A specialization is not used to guide overload resolution. */
11797 if (!DECL_FUNCTION_MEMBER_P (decl1
)
11798 && !(DECL_USE_TEMPLATE (decl1
) &&
11799 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
11801 tree olddecl
= pushdecl (decl1
);
11803 if (olddecl
== error_mark_node
)
11804 /* If something went wrong when registering the declaration,
11805 use DECL1; we have to have a FUNCTION_DECL to use when
11806 parsing the body of the function. */
11810 /* Otherwise, OLDDECL is either a previous declaration
11811 of the same function or DECL1 itself. */
11813 if (warn_missing_declarations
11814 && olddecl
== decl1
11815 && !DECL_MAIN_P (decl1
)
11816 && TREE_PUBLIC (decl1
)
11817 && !DECL_DECLARED_INLINE_P (decl1
))
11821 /* Check whether DECL1 is in an anonymous
11823 for (context
= DECL_CONTEXT (decl1
);
11825 context
= DECL_CONTEXT (context
))
11827 if (TREE_CODE (context
) == NAMESPACE_DECL
11828 && DECL_NAME (context
) == NULL_TREE
)
11832 if (context
== NULL
)
11833 warning (OPT_Wmissing_declarations
,
11834 "no previous declaration for %q+D", decl1
);
11842 /* We need to set the DECL_CONTEXT. */
11843 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
11844 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
11846 fntype
= TREE_TYPE (decl1
);
11848 /* If #pragma weak applies, mark the decl appropriately now.
11849 The pragma only applies to global functions. Because
11850 determining whether or not the #pragma applies involves
11851 computing the mangled name for the declaration, we cannot
11852 apply the pragma until after we have merged this declaration
11853 with any previous declarations; if the original declaration
11854 has a linkage specification, that specification applies to
11855 the definition as well, and may affect the mangled name. */
11856 if (!DECL_CONTEXT (decl1
))
11857 maybe_apply_pragma_weak (decl1
);
11860 /* Reset this in case the call to pushdecl changed it. */
11861 current_function_decl
= decl1
;
11863 gcc_assert (DECL_INITIAL (decl1
));
11865 /* This function may already have been parsed, in which case just
11866 return; our caller will skip over the body without parsing. */
11867 if (DECL_INITIAL (decl1
) != error_mark_node
)
11870 /* Initialize RTL machinery. We cannot do this until
11871 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11872 even when processing a template; this is how we get
11873 CFUN set up, and our per-function variables initialized.
11874 FIXME factor out the non-RTL stuff. */
11875 bl
= current_binding_level
;
11876 allocate_struct_function (decl1
, processing_template_decl
);
11878 /* Initialize the language data structures. Whenever we start
11879 a new function, we destroy temporaries in the usual way. */
11880 cfun
->language
= GGC_CNEW (struct language_function
);
11881 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
11882 current_binding_level
= bl
;
11884 /* Even though we're inside a function body, we still don't want to
11885 call expand_expr to calculate the size of a variable-sized array.
11886 We haven't necessarily assigned RTL to all variables yet, so it's
11887 not safe to try to expand expressions involving them. */
11888 cfun
->dont_save_pending_sizes_p
= 1;
11890 /* Start the statement-tree, start the tree now. */
11891 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
11893 /* If we are (erroneously) defining a function that we have already
11894 defined before, wipe out what we knew before. */
11895 if (!DECL_PENDING_INLINE_P (decl1
))
11896 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
11898 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
11900 /* We know that this was set up by `grokclassfn'. We do not
11901 wait until `store_parm_decls', since evil parse errors may
11902 never get us to that point. Here we keep the consistency
11903 between `current_class_type' and `current_class_ptr'. */
11904 tree t
= DECL_ARGUMENTS (decl1
);
11906 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
11907 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
11909 cp_function_chain
->x_current_class_ref
11910 = cp_build_indirect_ref (t
, NULL
, tf_warning_or_error
);
11911 cp_function_chain
->x_current_class_ptr
= t
;
11913 /* Constructors and destructors need to know whether they're "in
11914 charge" of initializing virtual base classes. */
11915 t
= TREE_CHAIN (t
);
11916 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
11918 current_in_charge_parm
= t
;
11919 t
= TREE_CHAIN (t
);
11921 if (DECL_HAS_VTT_PARM_P (decl1
))
11923 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
11924 current_vtt_parm
= t
;
11928 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
11929 /* Implicitly-defined methods (like the
11930 destructor for a class in which no destructor
11931 is explicitly declared) must not be defined
11932 until their definition is needed. So, we
11933 ignore interface specifications for
11934 compiler-generated functions. */
11935 && !DECL_ARTIFICIAL (decl1
));
11937 if (DECL_INTERFACE_KNOWN (decl1
))
11939 tree ctx
= decl_function_context (decl1
);
11941 if (DECL_NOT_REALLY_EXTERN (decl1
))
11942 DECL_EXTERNAL (decl1
) = 0;
11944 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
11945 && TREE_PUBLIC (ctx
))
11946 /* This is a function in a local class in an extern inline
11948 comdat_linkage (decl1
);
11950 /* If this function belongs to an interface, it is public.
11951 If it belongs to someone else's interface, it is also external.
11952 This only affects inlines and template instantiations. */
11953 else if (!finfo
->interface_unknown
&& honor_interface
)
11955 if (DECL_DECLARED_INLINE_P (decl1
)
11956 || DECL_TEMPLATE_INSTANTIATION (decl1
)
11957 || processing_template_decl
)
11959 DECL_EXTERNAL (decl1
)
11960 = (finfo
->interface_only
11961 || (DECL_DECLARED_INLINE_P (decl1
)
11962 && ! flag_implement_inlines
11963 && !DECL_VINDEX (decl1
)));
11965 /* For WIN32 we also want to put these in linkonce sections. */
11966 maybe_make_one_only (decl1
);
11969 DECL_EXTERNAL (decl1
) = 0;
11970 DECL_INTERFACE_KNOWN (decl1
) = 1;
11971 /* If this function is in an interface implemented in this file,
11972 make sure that the back end knows to emit this function
11974 if (!DECL_EXTERNAL (decl1
))
11975 mark_needed (decl1
);
11977 else if (finfo
->interface_unknown
&& finfo
->interface_only
11978 && honor_interface
)
11980 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11981 interface, we will have both finfo->interface_unknown and
11982 finfo->interface_only set. In that case, we don't want to
11983 use the normal heuristics because someone will supply a
11984 #pragma implementation elsewhere, and deducing it here would
11985 produce a conflict. */
11986 comdat_linkage (decl1
);
11987 DECL_EXTERNAL (decl1
) = 0;
11988 DECL_INTERFACE_KNOWN (decl1
) = 1;
11989 DECL_DEFER_OUTPUT (decl1
) = 1;
11993 /* This is a definition, not a reference.
11994 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11995 if (!GNU_INLINE_P (decl1
))
11996 DECL_EXTERNAL (decl1
) = 0;
11998 if ((DECL_DECLARED_INLINE_P (decl1
)
11999 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12000 && ! DECL_INTERFACE_KNOWN (decl1
)
12001 /* Don't try to defer nested functions for now. */
12002 && ! decl_function_context (decl1
))
12003 DECL_DEFER_OUTPUT (decl1
) = 1;
12005 DECL_INTERFACE_KNOWN (decl1
) = 1;
12008 /* Determine the ELF visibility attribute for the function. We must not
12009 do this before calling "pushdecl", as we must allow "duplicate_decls"
12010 to merge any attributes appropriately. We also need to wait until
12012 if (!DECL_CLONED_FUNCTION_P (decl1
))
12013 determine_visibility (decl1
);
12015 begin_scope (sk_function_parms
, decl1
);
12019 if (DECL_DESTRUCTOR_P (decl1
)
12020 || (DECL_CONSTRUCTOR_P (decl1
)
12021 && targetm
.cxx
.cdtor_returns_this ()))
12023 cdtor_label
= build_decl (input_location
,
12024 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
12025 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
12028 start_fname_decls ();
12030 store_parm_decls (current_function_parms
);
12034 /* Like start_preparsed_function, except that instead of a
12035 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12037 Returns 1 on success. If the DECLARATOR is not suitable for a function
12038 (it defines a datum instead), we return 0, which tells
12039 yyparse to report a parse error. */
12042 start_function (cp_decl_specifier_seq
*declspecs
,
12043 const cp_declarator
*declarator
,
12048 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
12049 if (decl1
== error_mark_node
)
12051 /* If the declarator is not suitable for a function definition,
12052 cause a syntax error. */
12053 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
12055 error ("invalid function declaration");
12059 if (DECL_MAIN_P (decl1
))
12060 /* main must return int. grokfndecl should have corrected it
12061 (and issued a diagnostic) if the user got it wrong. */
12062 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
12063 integer_type_node
));
12065 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
12070 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12074 use_eh_spec_block (tree fn
)
12076 return (flag_exceptions
&& flag_enforce_eh_specs
12077 && !processing_template_decl
12078 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn
))
12079 /* We insert the EH_SPEC_BLOCK only in the original
12080 function; then, it is copied automatically to the
12082 && !DECL_CLONED_FUNCTION_P (fn
)
12083 /* Implicitly-generated constructors and destructors have
12084 exception specifications. However, those specifications
12085 are the union of the possible exceptions specified by the
12086 constructors/destructors for bases and members, so no
12087 unallowed exception will ever reach this function. By
12088 not creating the EH_SPEC_BLOCK we save a little memory,
12089 and we avoid spurious warnings about unreachable
12091 && !DECL_ARTIFICIAL (fn
));
12094 /* Store the parameter declarations into the current function declaration.
12095 This is called after parsing the parameter declarations, before
12096 digesting the body of the function.
12098 Also install to binding contour return value identifier, if any. */
12101 store_parm_decls (tree current_function_parms
)
12103 tree fndecl
= current_function_decl
;
12106 /* This is a chain of any other decls that came in among the parm
12107 declarations. If a parm is declared with enum {foo, bar} x;
12108 then CONST_DECLs for foo and bar are put here. */
12109 tree nonparms
= NULL_TREE
;
12111 if (current_function_parms
)
12113 /* This case is when the function was defined with an ANSI prototype.
12114 The parms already have decls, so we need not do anything here
12115 except record them as in effect
12116 and complain if any redundant old-style parm decls were written. */
12118 tree specparms
= current_function_parms
;
12121 /* Must clear this because it might contain TYPE_DECLs declared
12123 current_binding_level
->names
= NULL
;
12125 /* If we're doing semantic analysis, then we'll call pushdecl
12126 for each of these. We must do them in reverse order so that
12127 they end in the correct forward order. */
12128 specparms
= nreverse (specparms
);
12130 for (parm
= specparms
; parm
; parm
= next
)
12132 next
= TREE_CHAIN (parm
);
12133 if (TREE_CODE (parm
) == PARM_DECL
)
12135 if (DECL_NAME (parm
) == NULL_TREE
12136 || TREE_CODE (parm
) != VOID_TYPE
)
12139 error ("parameter %qD declared void", parm
);
12143 /* If we find an enum constant or a type tag,
12144 put it aside for the moment. */
12145 TREE_CHAIN (parm
) = NULL_TREE
;
12146 nonparms
= chainon (nonparms
, parm
);
12150 /* Get the decls in their original chain order and record in the
12151 function. This is all and only the PARM_DECLs that were
12152 pushed into scope by the loop above. */
12153 DECL_ARGUMENTS (fndecl
) = getdecls ();
12156 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
12158 /* Now store the final chain of decls for the arguments
12159 as the decl-chain of the current lexical scope.
12160 Put the enumerators in as well, at the front so that
12161 DECL_ARGUMENTS is not modified. */
12162 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
12164 if (use_eh_spec_block (current_function_decl
))
12165 current_eh_spec_block
= begin_eh_spec_block ();
12169 /* We have finished doing semantic analysis on DECL, but have not yet
12170 generated RTL for its body. Save away our current state, so that
12171 when we want to generate RTL later we know what to do. */
12174 save_function_data (tree decl
)
12176 struct language_function
*f
;
12178 /* Save the language-specific per-function data so that we can
12179 get it back when we really expand this function. */
12180 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
12183 f
= GGC_NEW (struct language_function
);
12184 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
12185 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
12187 /* Clear out the bits we don't need. */
12188 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL_TREE
;
12189 f
->bindings
= NULL
;
12190 f
->x_local_names
= NULL
;
12194 /* Set the return value of the constructor (if present). */
12197 finish_constructor_body (void)
12202 if (targetm
.cxx
.cdtor_returns_this ()
12203 && (! TYPE_FOR_JAVA (current_class_type
)))
12205 /* Any return from a constructor will end up here. */
12206 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
12208 val
= DECL_ARGUMENTS (current_function_decl
);
12209 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
12210 DECL_RESULT (current_function_decl
), val
);
12211 /* Return the address of the object. */
12212 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
12213 add_stmt (exprstmt
);
12217 /* Do all the processing for the beginning of a destructor; set up the
12218 vtable pointers and cleanups for bases and members. */
12221 begin_destructor_body (void)
12223 tree compound_stmt
;
12225 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12226 issued an error message. We still want to try to process the
12227 body of the function, but initialize_vtbl_ptrs will crash if
12228 TYPE_BINFO is NULL. */
12229 if (COMPLETE_TYPE_P (current_class_type
))
12231 compound_stmt
= begin_compound_stmt (0);
12232 /* Make all virtual function table pointers in non-virtual base
12233 classes point to CURRENT_CLASS_TYPE's virtual function
12235 initialize_vtbl_ptrs (current_class_ptr
);
12236 finish_compound_stmt (compound_stmt
);
12238 /* And insert cleanups for our bases and members so that they
12239 will be properly destroyed if we throw. */
12240 push_base_cleanups ();
12244 /* At the end of every destructor we generate code to delete the object if
12245 necessary. Do that now. */
12248 finish_destructor_body (void)
12252 /* Any return from a destructor will end up here; that way all base
12253 and member cleanups will be run when the function returns. */
12254 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
12256 /* In a virtual destructor, we must call delete. */
12257 if (DECL_VIRTUAL_P (current_function_decl
))
12260 tree virtual_size
= cxx_sizeof (current_class_type
);
12264 At the point of definition of a virtual destructor (including
12265 an implicit definition), non-placement operator delete shall
12266 be looked up in the scope of the destructor's class and if
12267 found shall be accessible and unambiguous. */
12268 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
12270 /*global_p=*/false,
12271 /*placement=*/NULL_TREE
,
12272 /*alloc_fn=*/NULL_TREE
);
12274 if_stmt
= begin_if_stmt ();
12275 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
12276 current_in_charge_parm
,
12279 finish_expr_stmt (exprstmt
);
12280 finish_then_clause (if_stmt
);
12281 finish_if_stmt (if_stmt
);
12284 if (targetm
.cxx
.cdtor_returns_this ())
12288 val
= DECL_ARGUMENTS (current_function_decl
);
12289 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
12290 DECL_RESULT (current_function_decl
), val
);
12291 /* Return the address of the object. */
12292 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
12293 add_stmt (exprstmt
);
12297 /* Do the necessary processing for the beginning of a function body, which
12298 in this case includes member-initializers, but not the catch clauses of
12299 a function-try-block. Currently, this means opening a binding level
12300 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12303 begin_function_body (void)
12307 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
12310 if (processing_template_decl
)
12311 /* Do nothing now. */;
12313 /* Always keep the BLOCK node associated with the outermost pair of
12314 curly braces of a function. These are needed for correct
12315 operation of dwarfout.c. */
12316 keep_next_level (true);
12318 stmt
= begin_compound_stmt (BCS_FN_BODY
);
12320 if (processing_template_decl
)
12321 /* Do nothing now. */;
12322 else if (DECL_DESTRUCTOR_P (current_function_decl
))
12323 begin_destructor_body ();
12328 /* Do the processing for the end of a function body. Currently, this means
12329 closing out the cleanups for fully-constructed bases and members, and in
12330 the case of the destructor, deleting the object if desired. Again, this
12331 is only meaningful for [cd]tors, since they are the only functions where
12332 there is a significant distinction between the main body and any
12333 function catch clauses. Handling, say, main() return semantics here
12334 would be wrong, as flowing off the end of a function catch clause for
12335 main() would also need to return 0. */
12338 finish_function_body (tree compstmt
)
12340 if (compstmt
== NULL_TREE
)
12343 /* Close the block. */
12344 finish_compound_stmt (compstmt
);
12346 if (processing_template_decl
)
12347 /* Do nothing now. */;
12348 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
12349 finish_constructor_body ();
12350 else if (DECL_DESTRUCTOR_P (current_function_decl
))
12351 finish_destructor_body ();
12354 /* Given a function, returns the BLOCK corresponding to the outermost level
12355 of curly braces, skipping the artificial block created for constructor
12359 outer_curly_brace_block (tree fndecl
)
12361 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
12362 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
12363 /* Skip the artificial function body block. */
12364 block
= BLOCK_SUBBLOCKS (block
);
12368 /* Finish up a function declaration and compile that function
12369 all the way to assembler language output. The free the storage
12370 for the function definition.
12372 FLAGS is a bitwise or of the following values:
12374 We just finished processing the body of an in-class inline
12375 function definition. (This processing will have taken place
12376 after the class definition is complete.) */
12379 finish_function (int flags
)
12381 tree fndecl
= current_function_decl
;
12382 tree fntype
, ctype
= NULL_TREE
;
12383 int inclass_inline
= (flags
& 2) != 0;
12386 /* When we get some parse errors, we can end up without a
12387 current_function_decl, so cope. */
12388 if (fndecl
== NULL_TREE
)
12389 return error_mark_node
;
12391 gcc_assert (!defer_mark_used_calls
);
12392 defer_mark_used_calls
= true;
12394 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
12395 && DECL_VIRTUAL_P (fndecl
)
12396 && !processing_template_decl
)
12398 tree fnclass
= DECL_CONTEXT (fndecl
);
12399 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
12400 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
12403 nested
= function_depth
> 1;
12404 fntype
= TREE_TYPE (fndecl
);
12406 /* TREE_READONLY (fndecl) = 1;
12407 This caused &foo to be of type ptr-to-const-function
12408 which then got a warning when stored in a ptr-to-function variable. */
12410 gcc_assert (building_stmt_tree ());
12411 /* The current function is being defined, so its DECL_INITIAL should
12412 be set, and unless there's a multiple definition, it should be
12413 error_mark_node. */
12414 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
12416 /* For a cloned function, we've already got all the code we need;
12417 there's no need to add any extra bits. */
12418 if (!DECL_CLONED_FUNCTION_P (fndecl
))
12420 if (DECL_MAIN_P (current_function_decl
))
12424 /* Make it so that `main' always returns 0 by default (or
12427 stmt
= finish_return_stmt (integer_one_node
);
12429 stmt
= finish_return_stmt (integer_zero_node
);
12431 /* Hack. We don't want the middle-end to warn that this
12432 return is unreachable, so put the statement on the
12435 location_t linezero
= linemap_line_start (line_table
, 0, 1);
12436 SET_EXPR_LOCATION (stmt
, linezero
);
12440 if (use_eh_spec_block (current_function_decl
))
12441 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12442 (TREE_TYPE (current_function_decl
)),
12443 current_eh_spec_block
);
12446 /* If we're saving up tree structure, tie off the function now. */
12447 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
12449 finish_fname_decls ();
12451 /* If this function can't throw any exceptions, remember that. */
12452 if (!processing_template_decl
12453 && !cp_function_chain
->can_throw
12454 && !flag_non_call_exceptions
12455 && !DECL_REPLACEABLE_P (fndecl
))
12456 TREE_NOTHROW (fndecl
) = 1;
12458 /* This must come after expand_function_end because cleanups might
12459 have declarations (from inline functions) that need to go into
12460 this function's blocks. */
12462 /* If the current binding level isn't the outermost binding level
12463 for this function, either there is a bug, or we have experienced
12464 syntax errors and the statement tree is malformed. */
12465 if (current_binding_level
->kind
!= sk_function_parms
)
12467 /* Make sure we have already experienced errors. */
12468 gcc_assert (errorcount
);
12470 /* Throw away the broken statement tree and extra binding
12472 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
12474 while (current_binding_level
->kind
!= sk_function_parms
)
12476 if (current_binding_level
->kind
== sk_class
)
12477 pop_nested_class ();
12479 poplevel (0, 0, 0);
12482 poplevel (1, 0, 1);
12484 /* Statements should always be full-expressions at the outermost set
12485 of curly braces for a function. */
12486 gcc_assert (stmts_are_full_exprs_p ());
12488 /* Set up the named return value optimization, if we can. Candidate
12489 variables are selected in check_return_expr. */
12490 if (current_function_return_value
)
12492 tree r
= current_function_return_value
;
12495 if (r
!= error_mark_node
12496 /* This is only worth doing for fns that return in memory--and
12497 simpler, since we don't have to worry about promoted modes. */
12498 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
12499 /* Only allow this for variables declared in the outer scope of
12500 the function so we know that their lifetime always ends with a
12501 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12502 we were to do this optimization in tree-ssa. */
12503 && (outer
= outer_curly_brace_block (fndecl
))
12504 && chain_member (r
, BLOCK_VARS (outer
)))
12505 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
12507 current_function_return_value
= NULL_TREE
;
12510 /* Remember that we were in class scope. */
12511 if (current_class_name
)
12512 ctype
= current_class_type
;
12514 /* Must mark the RESULT_DECL as being in this function. */
12515 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
12517 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12518 to the FUNCTION_DECL node itself. */
12519 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
12521 /* Save away current state, if appropriate. */
12522 if (!processing_template_decl
)
12523 save_function_data (fndecl
);
12525 /* Complain if there's just no return statement. */
12526 if (warn_return_type
12527 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
12528 && !dependent_type_p (TREE_TYPE (fntype
))
12529 && !current_function_returns_value
&& !current_function_returns_null
12530 /* Don't complain if we abort or throw. */
12531 && !current_function_returns_abnormally
12532 && !DECL_NAME (DECL_RESULT (fndecl
))
12533 && !TREE_NO_WARNING (fndecl
)
12534 /* Structor return values (if any) are set by the compiler. */
12535 && !DECL_CONSTRUCTOR_P (fndecl
)
12536 && !DECL_DESTRUCTOR_P (fndecl
))
12538 warning (OPT_Wreturn_type
,
12539 "no return statement in function returning non-void");
12540 TREE_NO_WARNING (fndecl
) = 1;
12543 /* Store the end of the function, so that we get good line number
12544 info for the epilogue. */
12545 cfun
->function_end_locus
= input_location
;
12547 /* Genericize before inlining. */
12548 if (!processing_template_decl
)
12550 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
12551 invoke_plugin_callbacks (PLUGIN_CXX_CP_PRE_GENERICIZE
, fndecl
);
12552 cp_genericize (fndecl
);
12553 /* Clear out the bits we don't need. */
12554 f
->x_current_class_ptr
= NULL
;
12555 f
->x_current_class_ref
= NULL
;
12556 f
->x_eh_spec_block
= NULL
;
12557 f
->x_in_charge_parm
= NULL
;
12558 f
->x_vtt_parm
= NULL
;
12559 f
->x_return_value
= NULL
;
12560 f
->bindings
= NULL
;
12561 f
->extern_decl_map
= NULL
;
12563 /* Clear out the bits we don't need. */
12564 local_names
= NULL
;
12566 /* We're leaving the context of this function, so zap cfun. It's still in
12567 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12569 current_function_decl
= NULL
;
12571 /* If this is an in-class inline definition, we may have to pop the
12572 bindings for the template parameters that we added in
12573 maybe_begin_member_template_processing when start_function was
12575 if (inclass_inline
)
12576 maybe_end_member_template_processing ();
12578 /* Leave the scope of the class. */
12580 pop_nested_class ();
12586 /* Let the error reporting routines know that we're outside a
12587 function. For a nested function, this value is used in
12588 cxx_pop_function_context and then reset via pop_function_context. */
12589 current_function_decl
= NULL_TREE
;
12591 defer_mark_used_calls
= false;
12592 if (deferred_mark_used_calls
)
12597 for (i
= 0; VEC_iterate (tree
, deferred_mark_used_calls
, i
, decl
); i
++)
12599 VEC_free (tree
, gc
, deferred_mark_used_calls
);
12605 /* Create the FUNCTION_DECL for a function definition.
12606 DECLSPECS and DECLARATOR are the parts of the declaration;
12607 they describe the return type and the name of the function,
12608 but twisted together in a fashion that parallels the syntax of C.
12610 This function creates a binding context for the function body
12611 as well as setting up the FUNCTION_DECL in current_function_decl.
12613 Returns a FUNCTION_DECL on success.
12615 If the DECLARATOR is not suitable for a function (it defines a datum
12616 instead), we return 0, which tells yyparse to report a parse error.
12618 May return void_type_node indicating that this method is actually
12619 a friend. See grokfield for more details.
12621 Came here with a `.pushlevel' .
12623 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12624 CHANGES TO CODE IN `grokfield'. */
12627 grokmethod (cp_decl_specifier_seq
*declspecs
,
12628 const cp_declarator
*declarator
, tree attrlist
)
12630 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
12633 if (fndecl
== error_mark_node
)
12634 return error_mark_node
;
12636 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
12638 error ("invalid member function declaration");
12639 return error_mark_node
;
12643 cplus_decl_attributes (&fndecl
, attrlist
, 0);
12645 /* Pass friends other than inline friend functions back. */
12646 if (fndecl
== void_type_node
)
12649 if (DECL_IN_AGGR_P (fndecl
))
12651 if (DECL_CONTEXT (fndecl
)
12652 && TREE_CODE (DECL_CONTEXT (fndecl
)) != NAMESPACE_DECL
)
12653 error ("%qD is already defined in class %qT", fndecl
,
12654 DECL_CONTEXT (fndecl
));
12655 return error_mark_node
;
12658 check_template_shadow (fndecl
);
12660 DECL_DECLARED_INLINE_P (fndecl
) = 1;
12661 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
12663 /* We process method specializations in finish_struct_1. */
12664 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
12666 fndecl
= push_template_decl (fndecl
);
12667 if (fndecl
== error_mark_node
)
12671 if (! DECL_FRIEND_P (fndecl
))
12673 if (TREE_CHAIN (fndecl
))
12675 fndecl
= copy_node (fndecl
);
12676 TREE_CHAIN (fndecl
) = NULL_TREE
;
12680 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
12682 DECL_IN_AGGR_P (fndecl
) = 1;
12687 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12688 we can lay it out later, when and if its type becomes complete. */
12691 maybe_register_incomplete_var (tree var
)
12693 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
12695 /* Keep track of variables with incomplete types. */
12696 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
12697 && DECL_EXTERNAL (var
))
12699 tree inner_type
= TREE_TYPE (var
);
12701 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
12702 inner_type
= TREE_TYPE (inner_type
);
12703 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
12705 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
12706 /* RTTI TD entries are created while defining the type_info. */
12707 || (TYPE_LANG_SPECIFIC (inner_type
)
12708 && TYPE_BEING_DEFINED (inner_type
)))
12709 incomplete_vars
= tree_cons (inner_type
, var
, incomplete_vars
);
12713 /* Called when a class type (given by TYPE) is defined. If there are
12714 any existing VAR_DECLs whose type has been completed by this
12715 declaration, update them now. */
12718 complete_vars (tree type
)
12720 tree
*list
= &incomplete_vars
;
12722 gcc_assert (CLASS_TYPE_P (type
));
12725 if (same_type_p (type
, TREE_PURPOSE (*list
)))
12727 tree var
= TREE_VALUE (*list
);
12728 tree type
= TREE_TYPE (var
);
12729 /* Complete the type of the variable. The VAR_DECL itself
12730 will be laid out in expand_expr. */
12731 complete_type (type
);
12732 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
12733 /* Remove this entry from the list. */
12734 *list
= TREE_CHAIN (*list
);
12737 list
= &TREE_CHAIN (*list
);
12740 /* Check for pending declarations which may have abstract type. */
12741 complete_type_check_abstract (type
);
12744 /* If DECL is of a type which needs a cleanup, build and return an
12745 expression to perform that cleanup here. Return NULL_TREE if no
12746 cleanup need be done. */
12749 cxx_maybe_build_cleanup (tree decl
)
12755 /* Assume no cleanup is required. */
12756 cleanup
= NULL_TREE
;
12758 if (error_operand_p (decl
))
12761 /* Handle "__attribute__((cleanup))". We run the cleanup function
12762 before the destructor since the destructor is what actually
12763 terminates the lifetime of the object. */
12764 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
12771 /* Get the name specified by the user for the cleanup function. */
12772 id
= TREE_VALUE (TREE_VALUE (attr
));
12773 /* Look up the name to find the cleanup function to call. It is
12774 important to use lookup_name here because that is what is
12775 used in c-common.c:handle_cleanup_attribute when performing
12776 initial checks on the attribute. Note that those checks
12777 include ensuring that the function found is not an overloaded
12778 function, or an object with an overloaded call operator,
12779 etc.; we can rely on the fact that the function found is an
12780 ordinary FUNCTION_DECL. */
12781 fn
= lookup_name (id
);
12782 arg
= build_address (decl
);
12784 cleanup
= cp_build_function_call (fn
, build_tree_list (NULL_TREE
,
12786 tf_warning_or_error
);
12788 /* Handle ordinary C++ destructors. */
12789 type
= TREE_TYPE (decl
);
12790 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
12792 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
12793 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
12794 && CLASSTYPE_VBASECLASSES (type
));
12798 if (TREE_CODE (type
) == ARRAY_TYPE
)
12801 addr
= build_address (decl
);
12803 /* Optimize for space over speed here. */
12804 if (!has_vbases
|| flag_expensive_optimizations
)
12805 flags
|= LOOKUP_NONVIRTUAL
;
12807 call
= build_delete (TREE_TYPE (addr
), addr
,
12808 sfk_complete_destructor
, flags
, 0);
12810 cleanup
= build_compound_expr (input_location
, cleanup
, call
);
12818 /* When a stmt has been parsed, this function is called. */
12825 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
12826 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
12827 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
12830 static_fn_type (tree memfntype
)
12836 if (TYPE_PTRMEMFUNC_P (memfntype
))
12837 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
12838 if (POINTER_TYPE_P (memfntype
)
12839 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
12840 memfntype
= TREE_TYPE (memfntype
);
12841 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
12843 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
12844 args
= TYPE_ARG_TYPES (memfntype
);
12845 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
12846 quals
= cp_type_quals (TREE_TYPE (TREE_VALUE (args
)));
12847 fntype
= build_qualified_type (fntype
, quals
);
12848 fntype
= (cp_build_type_attribute_variant
12849 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
12850 fntype
= (build_exception_variant
12851 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
12855 /* DECL was originally constructed as a non-static member function,
12856 but turned out to be static. Update it accordingly. */
12859 revert_static_member_fn (tree decl
)
12861 TREE_TYPE (decl
) = static_fn_type (decl
);
12863 if (cp_type_quals (TREE_TYPE (decl
)) != TYPE_UNQUALIFIED
)
12864 error ("static member function %q#D declared with type qualifiers", decl
);
12866 if (DECL_ARGUMENTS (decl
))
12867 DECL_ARGUMENTS (decl
) = TREE_CHAIN (DECL_ARGUMENTS (decl
));
12868 DECL_STATIC_FUNCTION_P (decl
) = 1;
12871 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12872 one of the language-independent trees. */
12874 enum cp_tree_node_structure_enum
12875 cp_tree_node_structure (union lang_tree_node
* t
)
12877 switch (TREE_CODE (&t
->generic
))
12879 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
12880 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
12881 case OVERLOAD
: return TS_CP_OVERLOAD
;
12882 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
12883 case PTRMEM_CST
: return TS_CP_PTRMEM
;
12884 case BASELINK
: return TS_CP_BASELINK
;
12885 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
12886 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
12887 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
12888 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
12889 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
12890 default: return TS_CP_GENERIC
;
12894 /* Build the void_list_node (void_type_node having been created). */
12896 build_void_list_node (void)
12898 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
12903 cp_missing_noreturn_ok_p (tree decl
)
12905 /* A missing noreturn is ok for the `main' function. */
12906 return DECL_MAIN_P (decl
);
12909 /* Return the COMDAT group into which DECL should be placed. */
12912 cxx_comdat_group (tree decl
)
12916 /* Virtual tables, construction virtual tables, and virtual table
12917 tables all go in a single COMDAT group, named after the primary
12919 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
12920 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
12921 /* For all other DECLs, the COMDAT group is the mangled name of the
12922 declaration itself. */
12925 while (DECL_THUNK_P (decl
))
12927 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12928 into the same section as the target function. In that case
12929 we must return target's name. */
12930 tree target
= THUNK_TARGET (decl
);
12931 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
12932 && DECL_SECTION_NAME (target
) != NULL
12933 && DECL_ONE_ONLY (target
))
12938 name
= DECL_ASSEMBLER_NAME (decl
);
12944 #include "gt-cp-decl.h"