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 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
23 /* Process declarations and symbol lookup for C++ front end.
24 Also constructs types; the standard scalar types at initialization,
25 and structure, union, array and enum types when they are declared. */
27 /* ??? not all decl nodes are given the most useful possible
28 line numbers. For example, the CONST_DECLs for enum values. */
32 #include "coretypes.h"
39 #include "tree-inline.h"
49 #include "diagnostic.h"
53 #include "tree-flow.h"
54 #include "pointer-set.h"
56 static tree
grokparms (cp_parameter_declarator
*, tree
*);
57 static const char *redeclaration_error_message (tree
, tree
);
59 static int decl_jump_unsafe (tree
);
60 static void require_complete_types_for_parms (tree
);
61 static int ambi_op_p (enum tree_code
);
62 static int unary_op_p (enum tree_code
);
63 static void push_local_name (tree
);
64 static tree
grok_reference_init (tree
, tree
, tree
, tree
*);
65 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
67 static void record_unknown_type (tree
, const char *);
68 static tree
builtin_function_1 (tree
, tree
);
69 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
70 static int member_function_or_else (tree
, tree
, enum overload_flags
);
71 static void bad_specifiers (tree
, const char *, int, int, int, int,
73 static void check_for_uninitialized_const_var (tree
);
74 static hashval_t
typename_hash (const void *);
75 static int typename_compare (const void *, const void *);
76 static tree
local_variable_p_walkfn (tree
*, int *, void *);
77 static tree
record_builtin_java_type (const char *, int);
78 static const char *tag_name (enum tag_types
);
79 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
80 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
81 static void maybe_deduce_size_from_array_init (tree
, tree
);
82 static void layout_var_decl (tree
);
83 static void maybe_commonize_var (tree
);
84 static tree
check_initializer (tree
, tree
, int, tree
*);
85 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
86 static void save_function_data (tree
);
87 static void check_function_type (tree
, tree
);
88 static void finish_constructor_body (void);
89 static void begin_destructor_body (void);
90 static void finish_destructor_body (void);
91 static tree
create_array_type_for_decl (tree
, tree
, tree
);
92 static tree
get_atexit_node (void);
93 static tree
get_dso_handle_node (void);
94 static tree
start_cleanup_fn (void);
95 static void end_cleanup_fn (void);
96 static tree
cp_make_fname_decl (tree
, int);
97 static void initialize_predefined_identifiers (void);
98 static tree check_special_function_return_type
99 (special_function_kind
, tree
, tree
);
100 static tree
push_cp_library_fn (enum tree_code
, tree
);
101 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
102 static void store_parm_decls (tree
);
103 static void initialize_local_var (tree
, tree
);
104 static void expand_static_init (tree
, tree
);
105 static tree
next_initializable_field (tree
);
107 /* The following symbols are subsumed in the cp_global_trees array, and
108 listed here individually for documentation purposes.
111 tree wchar_decl_node;
113 tree vtable_entry_type;
114 tree delta_type_node;
115 tree __t_desc_type_node;
117 tree class_type_node;
118 tree unknown_type_node;
120 Array type `vtable_entry_type[]'
123 tree vtbl_ptr_type_node;
130 A FUNCTION_DECL which can call `abort'. Not necessarily the
131 one that the user will declare, but sufficient to be called
132 by routines that want to abort the program.
136 The FUNCTION_DECL for the default `::operator delete'.
138 tree global_delete_fndecl;
141 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
142 tree tinfo_var_id; */
144 tree cp_global_trees
[CPTI_MAX
];
146 /* Indicates that there is a type value in some namespace, although
147 that is not necessarily in scope at the moment. */
149 tree global_type_node
;
151 /* The node that holds the "name" of the global scope. */
152 tree global_scope_name
;
154 #define local_names cp_function_chain->x_local_names
156 /* A list of objects which have constructors or destructors
157 which reside in the global scope. The decl is stored in
158 the TREE_VALUE slot and the initializer is stored
159 in the TREE_PURPOSE slot. */
160 tree static_aggregates
;
164 /* A node for the integer constants 2, and 3. */
166 tree integer_two_node
, integer_three_node
;
168 /* Used only for jumps to as-yet undefined labels, since jumps to
169 defined labels can have their validity checked immediately. */
171 struct named_label_use_entry
GTY(())
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 named_label_entry
GTY(())
196 /* The decl itself. */
199 /* The binding level to which the label is *currently* attached.
200 This is initially set to the binding level in which the label
201 is defined, but is modified as scopes are closed. */
202 struct cp_binding_level
*binding_level
;
203 /* The head of the names list that was current when the label was
204 defined, or the inner scope popped. These are the decls that will
205 be skipped when jumping to the label. */
207 /* A tree list of all decls from all binding levels that would be
208 crossed by a backward branch to the label. */
211 /* A list of uses of the label, before the label is defined. */
212 struct named_label_use_entry
*uses
;
214 /* The following bits are set after the label is defined, and are
215 updated as scopes are popped. They indicate that a backward jump
216 to the label will illegally enter a scope of the given flavor. */
222 #define named_labels cp_function_chain->x_named_labels
224 /* The number of function bodies which we are currently processing.
225 (Zero if we are at namespace scope, one inside the body of a
226 function, two inside the body of a function in a local class, etc.) */
229 /* States indicating how grokdeclarator() should handle declspecs marked
230 with __attribute__((deprecated)). An object declared as
231 __attribute__((deprecated)) suppresses warnings of uses of other
234 enum deprecated_states
{
239 static enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
242 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
243 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
244 time the VAR_DECL was declared, the type was incomplete. */
246 static GTY(()) tree incomplete_vars
;
248 /* Returns the kind of template specialization we are currently
249 processing, given that it's declaration contained N_CLASS_SCOPES
250 explicit scope qualifications. */
253 current_tmpl_spec_kind (int n_class_scopes
)
255 int n_template_parm_scopes
= 0;
256 int seen_specialization_p
= 0;
257 int innermost_specialization_p
= 0;
258 struct cp_binding_level
*b
;
260 /* Scan through the template parameter scopes. */
261 for (b
= current_binding_level
;
262 b
->kind
== sk_template_parms
;
265 /* If we see a specialization scope inside a parameter scope,
266 then something is wrong. That corresponds to a declaration
269 template <class T> template <> ...
271 which is always invalid since [temp.expl.spec] forbids the
272 specialization of a class member template if the enclosing
273 class templates are not explicitly specialized as well. */
274 if (b
->explicit_spec_p
)
276 if (n_template_parm_scopes
== 0)
277 innermost_specialization_p
= 1;
279 seen_specialization_p
= 1;
281 else if (seen_specialization_p
== 1)
282 return tsk_invalid_member_spec
;
284 ++n_template_parm_scopes
;
287 /* Handle explicit instantiations. */
288 if (processing_explicit_instantiation
)
290 if (n_template_parm_scopes
!= 0)
291 /* We've seen a template parameter list during an explicit
292 instantiation. For example:
294 template <class T> template void f(int);
296 This is erroneous. */
297 return tsk_invalid_expl_inst
;
299 return tsk_expl_inst
;
302 if (n_template_parm_scopes
< n_class_scopes
)
303 /* We've not seen enough template headers to match all the
304 specialized classes present. For example:
306 template <class T> void R<T>::S<T>::f(int);
308 This is invalid; there needs to be one set of template
309 parameters for each class. */
310 return tsk_insufficient_parms
;
311 else if (n_template_parm_scopes
== n_class_scopes
)
312 /* We're processing a non-template declaration (even though it may
313 be a member of a template class.) For example:
315 template <class T> void S<T>::f(int);
317 The `class T' maches the `S<T>', leaving no template headers
318 corresponding to the `f'. */
320 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
321 /* We've got too many template headers. For example:
323 template <> template <class T> void f (T);
325 There need to be more enclosing classes. */
326 return tsk_excessive_parms
;
328 /* This must be a template. It's of the form:
330 template <class T> template <class U> void S<T>::f(U);
332 This is a specialization if the innermost level was a
333 specialization; otherwise it's just a definition of the
335 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
338 /* Exit the current scope. */
346 /* When a label goes out of scope, check to see if that label was used
347 in a valid manner, and issue any appropriate warnings or errors. */
350 pop_label (tree label
, tree old_value
)
352 if (!processing_template_decl
)
354 if (DECL_INITIAL (label
) == NULL_TREE
)
358 error ("label %q+D used but not defined", label
);
359 #ifdef USE_MAPPED_LOCATION
360 location
= input_location
; /* FIXME want (input_filename, (line)0) */
362 location
.file
= input_filename
;
365 /* Avoid crashing later. */
366 define_label (location
, DECL_NAME (label
));
369 warn_for_unused_label (label
);
372 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
375 /* At the end of a function, all labels declared within the function
376 go out of scope. BLOCK is the top-level block for the
380 pop_labels_1 (void **slot
, void *data
)
382 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
383 tree block
= (tree
) data
;
385 pop_label (ent
->label_decl
, NULL_TREE
);
387 /* Put the labels into the "variables" of the top-level block,
388 so debugger can see them. */
389 TREE_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
390 BLOCK_VARS (block
) = ent
->label_decl
;
392 htab_clear_slot (named_labels
, slot
);
398 pop_labels (tree block
)
402 htab_traverse (named_labels
, pop_labels_1
, block
);
407 /* At the end of a block with local labels, restore the outer definition. */
410 pop_local_label (tree label
, tree old_value
)
412 struct named_label_entry dummy
;
415 pop_label (label
, old_value
);
417 dummy
.label_decl
= label
;
418 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
419 htab_clear_slot (named_labels
, slot
);
422 /* The following two routines are used to interface to Objective-C++.
423 The binding level is purposely treated as an opaque type. */
426 objc_get_current_scope (void)
428 return current_binding_level
;
431 /* The following routine is used by the NeXT-style SJLJ exceptions;
432 variables get marked 'volatile' so as to not be clobbered by
433 _setjmp()/_longjmp() calls. All variables in the current scope,
434 as well as parent scopes up to (but not including) ENCLOSING_BLK
435 shall be thusly marked. */
438 objc_mark_locals_volatile (void *enclosing_blk
)
440 struct cp_binding_level
*scope
;
442 for (scope
= current_binding_level
;
443 scope
&& scope
!= enclosing_blk
;
444 scope
= scope
->level_chain
)
448 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
449 objc_volatilize_decl (decl
);
451 /* Do not climb up past the current function. */
452 if (scope
->kind
== sk_function_parms
)
457 /* Update data for defined and undefined labels when leaving a scope. */
460 poplevel_named_label_1 (void **slot
, void *data
)
462 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
463 struct cp_binding_level
*bl
= (struct cp_binding_level
*) data
;
464 struct cp_binding_level
*obl
= bl
->level_chain
;
466 if (ent
->binding_level
== bl
)
470 for (decl
= ent
->names_in_scope
; decl
; decl
= TREE_CHAIN (decl
))
471 if (decl_jump_unsafe (decl
))
472 ent
->bad_decls
= tree_cons (NULL
, decl
, ent
->bad_decls
);
474 ent
->binding_level
= obl
;
475 ent
->names_in_scope
= obl
->names
;
479 ent
->in_try_scope
= true;
482 ent
->in_catch_scope
= true;
485 ent
->in_omp_scope
= true;
493 struct named_label_use_entry
*use
;
495 for (use
= ent
->uses
; use
; use
= use
->next
)
496 if (use
->binding_level
== bl
)
498 use
->binding_level
= obl
;
499 use
->names_in_scope
= obl
->names
;
500 if (bl
->kind
== sk_omp
)
501 use
->in_omp_scope
= true;
508 /* Exit a binding level.
509 Pop the level off, and restore the state of the identifier-decl mappings
510 that were in effect when this level was entered.
512 If KEEP == 1, this level had explicit declarations, so
513 and create a "block" (a BLOCK node) for the level
514 to record its declarations and subblocks for symbol table output.
516 If FUNCTIONBODY is nonzero, this level is the body of a function,
517 so create a block as if KEEP were set and also clear out all
520 If REVERSE is nonzero, reverse the order of decls before putting
521 them into the BLOCK. */
524 poplevel (int keep
, int reverse
, int functionbody
)
527 /* The chain of decls was accumulated in reverse order.
528 Put it into forward order, just for cleanliness. */
530 int tmp
= functionbody
;
531 int real_functionbody
;
535 int leaving_for_scope
;
538 timevar_push (TV_NAME_LOOKUP
);
543 gcc_assert (current_binding_level
->kind
!= sk_class
);
545 real_functionbody
= (current_binding_level
->kind
== sk_cleanup
546 ? ((functionbody
= 0), tmp
) : functionbody
);
547 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
549 gcc_assert (!VEC_length(cp_class_binding
,
550 current_binding_level
->class_shadowed
));
552 /* We used to use KEEP == 2 to indicate that the new block should go
553 at the beginning of the list of blocks at this binding level,
554 rather than the end. This hack is no longer used. */
555 gcc_assert (keep
== 0 || keep
== 1);
557 if (current_binding_level
->keep
)
560 /* Any uses of undefined labels, and any defined labels, now operate
561 under constraints of next binding contour. */
562 if (cfun
&& !functionbody
&& named_labels
)
563 htab_traverse (named_labels
, poplevel_named_label_1
,
564 current_binding_level
);
566 /* Get the decls in the order they were written.
567 Usually current_binding_level->names is in reverse order.
568 But parameter decls were previously put in forward order. */
571 current_binding_level
->names
572 = decls
= nreverse (current_binding_level
->names
);
574 decls
= current_binding_level
->names
;
576 /* If there were any declarations or structure tags in that level,
577 or if this level is a function body,
578 create a BLOCK to record them for the life of this function. */
580 if (keep
== 1 || functionbody
)
581 block
= make_node (BLOCK
);
582 if (block
!= NULL_TREE
)
584 BLOCK_VARS (block
) = decls
;
585 BLOCK_SUBBLOCKS (block
) = subblocks
;
588 /* In each subblock, record that this is its superior. */
590 for (link
= subblocks
; link
; link
= TREE_CHAIN (link
))
591 BLOCK_SUPERCONTEXT (link
) = block
;
593 /* We still support the old for-scope rules, whereby the variables
594 in a for-init statement were in scope after the for-statement
595 ended. We only use the new rules if flag_new_for_scope is
598 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
600 /* Before we remove the declarations first check for unused variables. */
601 if (warn_unused_variable
602 && !processing_template_decl
)
603 for (decl
= getdecls (); decl
; decl
= TREE_CHAIN (decl
))
604 if (TREE_CODE (decl
) == VAR_DECL
605 && ! TREE_USED (decl
)
606 && ! DECL_IN_SYSTEM_HEADER (decl
)
607 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
))
608 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
610 /* Remove declarations for all the DECLs in this level. */
611 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
613 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
616 tree name
= DECL_NAME (link
);
620 ob
= outer_binding (name
,
621 IDENTIFIER_BINDING (name
),
624 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
626 ns_binding
= NULL_TREE
;
628 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
629 /* We have something like:
634 and we are leaving the `for' scope. There's no reason to
635 keep the binding of the inner `i' in this case. */
636 pop_binding (name
, link
);
637 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
638 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
639 /* Here, we have something like:
647 We must pop the for-scope binding so we know what's a
648 type and what isn't. */
649 pop_binding (name
, link
);
652 /* Mark this VAR_DECL as dead so that we can tell we left it
653 there only for backward compatibility. */
654 DECL_DEAD_FOR_LOCAL (link
) = 1;
656 /* Keep track of what should have happened when we
657 popped the binding. */
660 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
661 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
664 /* Add it to the list of dead variables in the next
665 outermost binding to that we can remove these when we
666 leave that binding. */
667 current_binding_level
->level_chain
->dead_vars_from_for
668 = tree_cons (NULL_TREE
, link
,
669 current_binding_level
->level_chain
->
672 /* Although we don't pop the cxx_binding, we do clear
673 its SCOPE since the scope is going away now. */
674 IDENTIFIER_BINDING (name
)->scope
675 = current_binding_level
->level_chain
;
682 /* Remove the binding. */
685 if (TREE_CODE (decl
) == TREE_LIST
)
686 decl
= TREE_VALUE (decl
);
689 if (TREE_CODE (name
) == OVERLOAD
)
690 name
= OVL_FUNCTION (name
);
692 gcc_assert (DECL_P (name
));
693 pop_binding (DECL_NAME (name
), decl
);
697 /* Remove declarations for any `for' variables from inner scopes
698 that we kept around. */
699 for (link
= current_binding_level
->dead_vars_from_for
;
700 link
; link
= TREE_CHAIN (link
))
701 pop_binding (DECL_NAME (TREE_VALUE (link
)), TREE_VALUE (link
));
703 /* Restore the IDENTIFIER_TYPE_VALUEs. */
704 for (link
= current_binding_level
->type_shadowed
;
705 link
; link
= TREE_CHAIN (link
))
706 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
708 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
709 for (link
= current_binding_level
->shadowed_labels
;
711 link
= TREE_CHAIN (link
))
712 pop_local_label (TREE_VALUE (link
), TREE_PURPOSE (link
));
714 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
715 list if a `using' declaration put them there. The debugging
716 back ends won't understand OVERLOAD, so we remove them here.
717 Because the BLOCK_VARS are (temporarily) shared with
718 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
719 popped all the bindings. */
724 for (d
= &BLOCK_VARS (block
); *d
; )
726 if (TREE_CODE (*d
) == TREE_LIST
)
727 *d
= TREE_CHAIN (*d
);
729 d
= &TREE_CHAIN (*d
);
733 /* If the level being exited is the top level of a function,
734 check over all the labels. */
737 /* Since this is the top level block of a function, the vars are
738 the function's parameters. Don't leave them in the BLOCK
739 because they are found in the FUNCTION_DECL instead. */
740 BLOCK_VARS (block
) = 0;
744 kind
= current_binding_level
->kind
;
745 if (kind
== sk_cleanup
)
749 /* If this is a temporary binding created for a cleanup, then we'll
750 have pushed a statement list level. Pop that, create a new
751 BIND_EXPR for the block, and insert it into the stream. */
752 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
753 stmt
= c_build_bind_expr (block
, stmt
);
760 /* The current function is being defined, so its DECL_INITIAL
761 should be error_mark_node. */
762 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
763 DECL_INITIAL (current_function_decl
) = block
;
766 current_binding_level
->blocks
767 = chainon (current_binding_level
->blocks
, block
);
769 /* If we did not make a block for the level just exited,
770 any blocks made for inner levels
771 (since they cannot be recorded as subblocks in that level)
772 must be carried forward so they will later become subblocks
773 of something else. */
775 current_binding_level
->blocks
776 = chainon (current_binding_level
->blocks
, subblocks
);
778 /* Each and every BLOCK node created here in `poplevel' is important
779 (e.g. for proper debugging information) so if we created one
780 earlier, mark it as "used". */
782 TREE_USED (block
) = 1;
784 /* All temporary bindings created for cleanups are popped silently. */
785 if (kind
== sk_cleanup
)
788 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, block
);
791 /* Insert BLOCK at the end of the list of subblocks of the
792 current binding level. This is used when a BIND_EXPR is expanded,
793 to handle the BLOCK node inside the BIND_EXPR. */
796 insert_block (tree block
)
798 TREE_USED (block
) = 1;
799 current_binding_level
->blocks
800 = chainon (current_binding_level
->blocks
, block
);
803 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
804 itself, calling F for each. The DATA is passed to F as well. */
807 walk_namespaces_r (tree
namespace, walk_namespaces_fn f
, void* data
)
810 tree current
= NAMESPACE_LEVEL (namespace)->namespaces
;
812 result
|= (*f
) (namespace, data
);
814 for (; current
; current
= TREE_CHAIN (current
))
815 result
|= walk_namespaces_r (current
, f
, data
);
820 /* Walk all the namespaces, calling F for each. The DATA is passed to
824 walk_namespaces (walk_namespaces_fn f
, void* data
)
826 return walk_namespaces_r (global_namespace
, f
, data
);
829 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
830 DATA is non-NULL, this is the last time we will call
831 wrapup_global_declarations for this NAMESPACE. */
834 wrapup_globals_for_namespace (tree
namespace, void* data
)
836 struct cp_binding_level
*level
= NAMESPACE_LEVEL (namespace);
837 VEC(tree
,gc
) *statics
= level
->static_decls
;
838 tree
*vec
= VEC_address (tree
, statics
);
839 int len
= VEC_length (tree
, statics
);
840 int last_time
= (data
!= 0);
844 check_global_declarations (vec
, len
);
845 emit_debug_global_declarations (vec
, len
);
849 /* Write out any globals that need to be output. */
850 return wrapup_global_declarations (vec
, len
);
854 /* In C++, you don't have to write `struct S' to refer to `S'; you
855 can just use `S'. We accomplish this by creating a TYPE_DECL as
856 if the user had written `typedef struct S S'. Create and return
857 the TYPE_DECL for TYPE. */
860 create_implicit_typedef (tree name
, tree type
)
864 decl
= build_decl (TYPE_DECL
, name
, type
);
865 DECL_ARTIFICIAL (decl
) = 1;
866 /* There are other implicit type declarations, like the one *within*
867 a class that allows you to write `S::S'. We must distinguish
869 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
870 TYPE_NAME (type
) = decl
;
875 /* Remember a local name for name-mangling purposes. */
878 push_local_name (tree decl
)
883 timevar_push (TV_NAME_LOOKUP
);
885 name
= DECL_NAME (decl
);
887 nelts
= VEC_length (tree
, local_names
);
888 for (i
= 0; i
< nelts
; i
++)
890 t
= VEC_index (tree
, local_names
, i
);
891 if (DECL_NAME (t
) == name
)
893 if (!DECL_LANG_SPECIFIC (decl
))
894 retrofit_lang_decl (decl
);
895 DECL_LANG_SPECIFIC (decl
)->decl_flags
.u2sel
= 1;
896 if (DECL_LANG_SPECIFIC (t
))
897 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
899 DECL_DISCRIMINATOR (decl
) = 1;
901 VEC_replace (tree
, local_names
, i
, decl
);
902 timevar_pop (TV_NAME_LOOKUP
);
907 VEC_safe_push (tree
, gc
, local_names
, decl
);
908 timevar_pop (TV_NAME_LOOKUP
);
911 /* Subroutine of duplicate_decls: return truthvalue of whether
912 or not types of these decls match.
914 For C++, we must compare the parameter list so that `int' can match
915 `int&' in a parameter position, but `int&' is not confused with
919 decls_match (tree newdecl
, tree olddecl
)
923 if (newdecl
== olddecl
)
926 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
927 /* If the two DECLs are not even the same kind of thing, we're not
928 interested in their types. */
931 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
933 tree f1
= TREE_TYPE (newdecl
);
934 tree f2
= TREE_TYPE (olddecl
);
935 tree p1
= TYPE_ARG_TYPES (f1
);
936 tree p2
= TYPE_ARG_TYPES (f2
);
938 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
939 && ! (DECL_EXTERN_C_P (newdecl
)
940 && DECL_EXTERN_C_P (olddecl
)))
943 if (TREE_CODE (f1
) != TREE_CODE (f2
))
946 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
948 if (p2
== NULL_TREE
&& DECL_EXTERN_C_P (olddecl
)
949 && (DECL_BUILT_IN (olddecl
)
950 #ifndef NO_IMPLICIT_EXTERN_C
951 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
952 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
956 types_match
= self_promoting_args_p (p1
);
957 if (p1
== void_list_node
)
958 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
960 #ifndef NO_IMPLICIT_EXTERN_C
961 else if (p1
== NULL_TREE
962 && (DECL_EXTERN_C_P (olddecl
)
963 && DECL_IN_SYSTEM_HEADER (olddecl
)
964 && !DECL_CLASS_SCOPE_P (olddecl
))
965 && (DECL_EXTERN_C_P (newdecl
)
966 && DECL_IN_SYSTEM_HEADER (newdecl
)
967 && !DECL_CLASS_SCOPE_P (newdecl
)))
969 types_match
= self_promoting_args_p (p2
);
970 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
974 types_match
= compparms (p1
, p2
);
979 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
981 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
982 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
985 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
986 DECL_TEMPLATE_PARMS (olddecl
)))
989 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
990 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
991 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
993 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
994 DECL_TEMPLATE_RESULT (newdecl
));
998 /* Need to check scope for variable declaration (VAR_DECL).
999 For typedef (TYPE_DECL), scope is ignored. */
1000 if (TREE_CODE (newdecl
) == VAR_DECL
1001 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1003 Two declarations for an object with C language linkage
1004 with the same name (ignoring the namespace that qualify
1005 it) that appear in different namespace scopes refer to
1007 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1010 if (TREE_TYPE (newdecl
) == error_mark_node
)
1011 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1012 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1013 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1014 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1017 types_match
= comptypes (TREE_TYPE (newdecl
),
1018 TREE_TYPE (olddecl
),
1019 COMPARE_REDECLARATION
);
1025 /* If NEWDECL is `static' and an `extern' was seen previously,
1026 warn about it. OLDDECL is the previous declaration.
1028 Note that this does not apply to the C++ case of declaring
1029 a variable `extern const' and then later `const'.
1031 Don't complain about built-in functions, since they are beyond
1032 the user's control. */
1035 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1039 if (TREE_CODE (newdecl
) == TYPE_DECL
1040 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1041 || TREE_CODE (newdecl
) == CONST_DECL
1042 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1045 /* Don't get confused by static member functions; that's a different
1047 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1048 && DECL_STATIC_FUNCTION_P (newdecl
))
1051 /* If the old declaration was `static', or the new one isn't, then
1052 then everything is OK. */
1053 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1056 /* It's OK to declare a builtin function as `static'. */
1057 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1058 && DECL_ARTIFICIAL (olddecl
))
1061 name
= DECL_ASSEMBLER_NAME (newdecl
);
1062 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl
);
1063 pedwarn ("previous declaration of %q+D", olddecl
);
1066 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1067 function templates. If their exception specifications do not
1068 match, issue a diagnostic. */
1071 check_redeclaration_exception_specification (tree new_decl
,
1076 tree new_exceptions
;
1077 tree old_exceptions
;
1079 new_type
= TREE_TYPE (new_decl
);
1080 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1081 old_type
= TREE_TYPE (old_decl
);
1082 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1086 If any declaration of a function has an exception-specification,
1087 all declarations, including the definition and an explicit
1088 specialization, of that function shall have an
1089 exception-specification with the same set of type-ids. */
1090 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1091 && ! DECL_IS_BUILTIN (old_decl
)
1093 && !comp_except_specs (new_exceptions
, old_exceptions
,
1096 error ("declaration of %qF throws different exceptions", new_decl
);
1097 error ("from previous declaration %q+F", old_decl
);
1101 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1102 && lookup_attribute ("gnu_inline", \
1103 DECL_ATTRIBUTES (fn)))
1105 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1106 If the redeclaration is invalid, a diagnostic is issued, and the
1107 error_mark_node is returned. Otherwise, OLDDECL is returned.
1109 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1112 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1115 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1117 unsigned olddecl_uid
= DECL_UID (olddecl
);
1118 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1119 int new_defines_function
= 0;
1122 if (newdecl
== olddecl
)
1125 types_match
= decls_match (newdecl
, olddecl
);
1127 /* If either the type of the new decl or the type of the old decl is an
1128 error_mark_node, then that implies that we have already issued an
1129 error (earlier) for some bogus type specification, and in that case,
1130 it is rather pointless to harass the user with yet more error message
1131 about the same declaration, so just pretend the types match here. */
1132 if (TREE_TYPE (newdecl
) == error_mark_node
1133 || TREE_TYPE (olddecl
) == error_mark_node
)
1134 return error_mark_node
;
1136 if (DECL_P (olddecl
)
1137 && TREE_CODE (newdecl
) == FUNCTION_DECL
1138 && TREE_CODE (olddecl
) == FUNCTION_DECL
1139 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1141 if (DECL_DECLARED_INLINE_P (newdecl
)
1142 && DECL_UNINLINABLE (newdecl
)
1143 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1144 /* Already warned elsewhere. */;
1145 else if (DECL_DECLARED_INLINE_P (olddecl
)
1146 && DECL_UNINLINABLE (olddecl
)
1147 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1148 /* Already warned. */;
1149 else if (DECL_DECLARED_INLINE_P (newdecl
)
1150 && DECL_UNINLINABLE (olddecl
)
1151 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1153 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1155 warning (OPT_Wattributes
, "previous declaration of %q+D "
1156 "with attribute noinline", olddecl
);
1158 else if (DECL_DECLARED_INLINE_P (olddecl
)
1159 && DECL_UNINLINABLE (newdecl
)
1160 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1162 warning (OPT_Wattributes
, "function %q+D redeclared with "
1163 "attribute noinline", newdecl
);
1164 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1169 /* Check for redeclaration and other discrepancies. */
1170 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1171 && DECL_ARTIFICIAL (olddecl
))
1173 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1174 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1176 /* Avoid warnings redeclaring built-ins which have not been
1177 explicitly declared. */
1178 if (DECL_ANTICIPATED (olddecl
))
1181 /* If you declare a built-in or predefined function name as static,
1182 the old definition is overridden, but optionally warn this was a
1183 bad choice of name. */
1184 if (! TREE_PUBLIC (newdecl
))
1186 warning (OPT_Wshadow
, "shadowing %s function %q#D",
1187 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1189 /* Discard the old built-in function. */
1192 /* If the built-in is not ansi, then programs can override
1193 it even globally without an error. */
1194 else if (! DECL_BUILT_IN (olddecl
))
1195 warning (0, "library function %q#D redeclared as non-function %q#D",
1199 error ("declaration of %q#D", newdecl
);
1200 error ("conflicts with built-in declaration %q#D",
1205 else if (!types_match
)
1207 /* Avoid warnings redeclaring built-ins which have not been
1208 explicitly declared. */
1209 if (DECL_ANTICIPATED (olddecl
))
1211 /* Deal with fileptr_type_node. FILE type is not known
1212 at the time we create the builtins. */
1215 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1216 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1218 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1221 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1223 tree t
= TREE_VALUE (t1
);
1225 if (TREE_CODE (t
) == POINTER_TYPE
1226 && TYPE_NAME (TREE_TYPE (t
))
1227 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1228 == get_identifier ("FILE")
1229 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1231 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1233 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1234 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1235 types_match
= decls_match (newdecl
, olddecl
);
1237 return duplicate_decls (newdecl
, olddecl
,
1239 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1242 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1245 else if ((DECL_EXTERN_C_P (newdecl
)
1246 && DECL_EXTERN_C_P (olddecl
))
1247 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1248 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1250 /* A near match; override the builtin. */
1252 if (TREE_PUBLIC (newdecl
))
1254 warning (0, "new declaration %q#D", newdecl
);
1255 warning (0, "ambiguates built-in declaration %q#D",
1259 warning (OPT_Wshadow
, "shadowing %s function %q#D",
1260 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1264 /* Discard the old built-in function. */
1267 /* Replace the old RTL to avoid problems with inlining. */
1268 COPY_DECL_RTL (newdecl
, olddecl
);
1270 /* Even if the types match, prefer the new declarations type for
1271 built-ins which have not been explicitly declared, for
1272 exception lists, etc... */
1273 else if (DECL_ANTICIPATED (olddecl
))
1275 tree type
= TREE_TYPE (newdecl
);
1276 tree attribs
= (*targetm
.merge_type_attributes
)
1277 (TREE_TYPE (olddecl
), type
);
1279 type
= cp_build_type_attribute_variant (type
, attribs
);
1280 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1283 /* If a function is explicitly declared "throw ()", propagate that to
1284 the corresponding builtin. */
1285 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1286 && DECL_ANTICIPATED (olddecl
)
1287 && TREE_NOTHROW (newdecl
)
1288 && !TREE_NOTHROW (olddecl
)
1289 && built_in_decls
[DECL_FUNCTION_CODE (olddecl
)] != NULL_TREE
1290 && built_in_decls
[DECL_FUNCTION_CODE (olddecl
)] != olddecl
1292 TREE_NOTHROW (built_in_decls
[DECL_FUNCTION_CODE (olddecl
)]) = 1;
1294 /* Whether or not the builtin can throw exceptions has no
1295 bearing on this declarator. */
1296 TREE_NOTHROW (olddecl
) = 0;
1298 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1300 /* If a builtin function is redeclared as `static', merge
1301 the declarations, but make the original one static. */
1302 DECL_THIS_STATIC (olddecl
) = 1;
1303 TREE_PUBLIC (olddecl
) = 0;
1305 /* Make the old declaration consistent with the new one so
1306 that all remnants of the builtin-ness of this function
1307 will be banished. */
1308 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1309 COPY_DECL_RTL (newdecl
, olddecl
);
1312 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1314 /* C++ Standard, 3.3, clause 4:
1315 "[Note: a namespace name or a class template name must be unique
1316 in its declarative region (7.3.2, clause 14). ]" */
1317 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1318 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1319 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1320 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1321 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1322 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1324 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1325 && TREE_CODE (newdecl
) != TYPE_DECL
)
1326 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1327 && TREE_CODE (olddecl
) != TYPE_DECL
))
1329 /* We do nothing special here, because C++ does such nasty
1330 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1331 get shadowed, and know that if we need to find a TYPE_DECL
1332 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1333 slot of the identifier. */
1337 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1338 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1339 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1340 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1344 error ("%q#D redeclared as different kind of symbol", newdecl
);
1345 if (TREE_CODE (olddecl
) == TREE_LIST
)
1346 olddecl
= TREE_VALUE (olddecl
);
1347 error ("previous declaration of %q+#D", olddecl
);
1349 return error_mark_node
;
1351 else if (!types_match
)
1353 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1354 /* These are certainly not duplicate declarations; they're
1355 from different scopes. */
1358 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1360 /* The name of a class template may not be declared to refer to
1361 any other template, class, function, object, namespace, value,
1362 or type in the same scope. */
1363 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1364 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1366 error ("declaration of template %q#D", newdecl
);
1367 error ("conflicts with previous declaration %q+#D", olddecl
);
1369 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1370 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1371 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1372 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1373 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1374 DECL_TEMPLATE_PARMS (olddecl
))
1375 /* Template functions can be disambiguated by
1377 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1378 TREE_TYPE (TREE_TYPE (olddecl
))))
1380 error ("new declaration %q#D", newdecl
);
1381 error ("ambiguates old declaration %q+#D", olddecl
);
1385 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1387 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1389 error ("declaration of C function %q#D conflicts with",
1391 error ("previous declaration %q+#D here", olddecl
);
1393 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1394 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1396 error ("new declaration %q#D", newdecl
);
1397 error ("ambiguates old declaration %q+#D", olddecl
);
1398 return error_mark_node
;
1405 error ("conflicting declaration %q#D", newdecl
);
1406 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1407 return error_mark_node
;
1410 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1411 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1412 && (!DECL_TEMPLATE_INFO (newdecl
)
1413 || (DECL_TI_TEMPLATE (newdecl
)
1414 != DECL_TI_TEMPLATE (olddecl
))))
1415 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1416 && (!DECL_TEMPLATE_INFO (olddecl
)
1417 || (DECL_TI_TEMPLATE (olddecl
)
1418 != DECL_TI_TEMPLATE (newdecl
))))))
1419 /* It's OK to have a template specialization and a non-template
1420 with the same type, or to have specializations of two
1421 different templates with the same type. Note that if one is a
1422 specialization, and the other is an instantiation of the same
1423 template, that we do not exit at this point. That situation
1424 can occur if we instantiate a template class, and then
1425 specialize one of its methods. This situation is valid, but
1426 the declarations must be merged in the usual way. */
1428 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1429 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1430 && !DECL_USE_TEMPLATE (newdecl
))
1431 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1432 && !DECL_USE_TEMPLATE (olddecl
))))
1433 /* One of the declarations is a template instantiation, and the
1434 other is not a template at all. That's OK. */
1436 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1438 /* In [namespace.alias] we have:
1440 In a declarative region, a namespace-alias-definition can be
1441 used to redefine a namespace-alias declared in that declarative
1442 region to refer only to the namespace to which it already
1445 Therefore, if we encounter a second alias directive for the same
1446 alias, we can just ignore the second directive. */
1447 if (DECL_NAMESPACE_ALIAS (newdecl
)
1448 && (DECL_NAMESPACE_ALIAS (newdecl
)
1449 == DECL_NAMESPACE_ALIAS (olddecl
)))
1451 /* [namespace.alias]
1453 A namespace-name or namespace-alias shall not be declared as
1454 the name of any other entity in the same declarative region.
1455 A namespace-name defined at global scope shall not be
1456 declared as the name of any other entity in any global scope
1458 error ("declaration of namespace %qD conflicts with", newdecl
);
1459 error ("previous declaration of namespace %q+D here", olddecl
);
1460 return error_mark_node
;
1464 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1467 error (errmsg
, newdecl
);
1468 if (DECL_NAME (olddecl
) != NULL_TREE
)
1469 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1470 ? "%q+#D previously defined here"
1471 : "%q+#D previously declared here", olddecl
);
1472 return error_mark_node
;
1474 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1475 && DECL_INITIAL (olddecl
) != NULL_TREE
1476 && TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) == NULL_TREE
1477 && TYPE_ARG_TYPES (TREE_TYPE (newdecl
)) != NULL_TREE
)
1479 /* Prototype decl follows defn w/o prototype. */
1480 warning (0, "prototype for %q+#D", newdecl
);
1481 warning (0, "%Jfollows non-prototype definition here", olddecl
);
1483 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1484 || TREE_CODE (olddecl
) == VAR_DECL
)
1485 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1488 If two declarations of the same function or object
1489 specify different linkage-specifications ..., the program
1490 is ill-formed.... Except for functions with C++ linkage,
1491 a function declaration without a linkage specification
1492 shall not precede the first linkage specification for
1493 that function. A function can be declared without a
1494 linkage specification after an explicit linkage
1495 specification has been seen; the linkage explicitly
1496 specified in the earlier declaration is not affected by
1497 such a function declaration.
1499 DR 563 raises the question why the restrictions on
1500 functions should not also apply to objects. Older
1501 versions of G++ silently ignore the linkage-specification
1509 which is clearly wrong. Therefore, we now treat objects
1511 if (current_lang_depth () == 0)
1513 /* There is no explicit linkage-specification, so we use
1514 the linkage from the previous declaration. */
1515 if (!DECL_LANG_SPECIFIC (newdecl
))
1516 retrofit_lang_decl (newdecl
);
1517 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1521 error ("previous declaration of %q+#D with %qL linkage",
1522 olddecl
, DECL_LANGUAGE (olddecl
));
1523 error ("conflicts with new declaration with %qL linkage",
1524 DECL_LANGUAGE (newdecl
));
1528 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1530 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1532 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1533 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1536 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1537 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1539 for (; t1
&& t1
!= void_list_node
;
1540 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1541 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1543 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1546 pedwarn ("default argument given for parameter %d of %q#D",
1548 pedwarn ("after previous specification in %q+#D", olddecl
);
1552 error ("default argument given for parameter %d of %q#D",
1554 error ("after previous specification in %q+#D",
1559 if (DECL_DECLARED_INLINE_P (newdecl
)
1560 && ! DECL_DECLARED_INLINE_P (olddecl
)
1561 && TREE_ADDRESSABLE (olddecl
) && warn_inline
)
1563 warning (0, "%q#D was used before it was declared inline", newdecl
);
1564 warning (0, "%Jprevious non-inline declaration here", olddecl
);
1569 /* Do not merge an implicit typedef with an explicit one. In:
1573 typedef class A A __attribute__ ((foo));
1575 the attribute should apply only to the typedef. */
1576 if (TREE_CODE (olddecl
) == TYPE_DECL
1577 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1578 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1581 /* If new decl is `static' and an `extern' was seen previously,
1583 warn_extern_redeclared_static (newdecl
, olddecl
);
1585 /* We have committed to returning 1 at this point. */
1586 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1588 /* Now that functions must hold information normally held
1589 by field decls, there is extra work to do so that
1590 declaration information does not get destroyed during
1592 if (DECL_VINDEX (olddecl
))
1593 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1594 if (DECL_CONTEXT (olddecl
))
1595 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1596 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1597 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1598 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1599 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1600 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1601 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1602 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1603 SET_OVERLOADED_OPERATOR_CODE
1604 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1605 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1607 /* Optionally warn about more than one declaration for the same
1608 name, but don't warn about a function declaration followed by a
1610 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1611 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1612 /* Don't warn about extern decl followed by definition. */
1613 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1614 /* Don't warn about friends, let add_friend take care of it. */
1615 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
)))
1617 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1618 warning (OPT_Wredundant_decls
, "previous declaration of %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
))
1662 DECL_INLINE (old_result
) = 0;
1663 DECL_UNINLINABLE (old_result
) = 1;
1667 DECL_INLINE (old_result
) = DECL_INLINE (new_result
);
1668 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1670 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1671 DECL_NOT_REALLY_EXTERN (old_result
)
1672 = DECL_NOT_REALLY_EXTERN (new_result
);
1673 DECL_INTERFACE_KNOWN (old_result
)
1674 = DECL_INTERFACE_KNOWN (new_result
);
1675 DECL_DECLARED_INLINE_P (old_result
)
1676 = DECL_DECLARED_INLINE_P (new_result
);
1680 DECL_INLINE (old_result
)
1681 |= DECL_INLINE (new_result
);
1682 DECL_DECLARED_INLINE_P (old_result
)
1683 |= DECL_DECLARED_INLINE_P (new_result
);
1684 check_redeclaration_exception_specification (newdecl
, olddecl
);
1688 /* If the new declaration is a definition, update the file and
1689 line information on the declaration, and also make
1690 the old declaration the same definition. */
1691 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1693 DECL_SOURCE_LOCATION (olddecl
)
1694 = DECL_SOURCE_LOCATION (old_result
)
1695 = DECL_SOURCE_LOCATION (newdecl
);
1696 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1697 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1698 DECL_ARGUMENTS (old_result
)
1699 = DECL_ARGUMENTS (new_result
);
1707 /* Automatically handles default parameters. */
1708 tree oldtype
= TREE_TYPE (olddecl
);
1711 /* Merge the data types specified in the two decls. */
1712 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1714 /* If merge_types produces a non-typedef type, just use the old type. */
1715 if (TREE_CODE (newdecl
) == TYPE_DECL
1716 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1719 if (TREE_CODE (newdecl
) == VAR_DECL
)
1721 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1722 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1723 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1724 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1725 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1726 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1728 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1729 if (DECL_LANG_SPECIFIC (olddecl
)
1730 && CP_DECL_THREADPRIVATE_P (olddecl
))
1732 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1733 if (!DECL_LANG_SPECIFIC (newdecl
))
1734 retrofit_lang_decl (newdecl
);
1736 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1737 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1741 /* Do this after calling `merge_types' so that default
1742 parameters don't confuse us. */
1743 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1744 check_redeclaration_exception_specification (newdecl
, olddecl
);
1745 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1747 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1748 check_default_args (newdecl
);
1750 /* Lay the type out, unless already done. */
1751 if (! same_type_p (newtype
, oldtype
)
1752 && TREE_TYPE (newdecl
) != error_mark_node
1753 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1754 layout_type (TREE_TYPE (newdecl
));
1756 if ((TREE_CODE (newdecl
) == VAR_DECL
1757 || TREE_CODE (newdecl
) == PARM_DECL
1758 || TREE_CODE (newdecl
) == RESULT_DECL
1759 || TREE_CODE (newdecl
) == FIELD_DECL
1760 || TREE_CODE (newdecl
) == TYPE_DECL
)
1761 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1762 layout_decl (newdecl
, 0);
1764 /* Merge the type qualifiers. */
1765 if (TREE_READONLY (newdecl
))
1766 TREE_READONLY (olddecl
) = 1;
1767 if (TREE_THIS_VOLATILE (newdecl
))
1768 TREE_THIS_VOLATILE (olddecl
) = 1;
1769 if (TREE_NOTHROW (newdecl
))
1770 TREE_NOTHROW (olddecl
) = 1;
1772 /* Merge deprecatedness. */
1773 if (TREE_DEPRECATED (newdecl
))
1774 TREE_DEPRECATED (olddecl
) = 1;
1776 /* Merge the initialization information. */
1777 if (DECL_INITIAL (newdecl
) == NULL_TREE
1778 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1780 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1781 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1782 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl
)
1783 && DECL_LANG_SPECIFIC (newdecl
)
1784 && DECL_LANG_SPECIFIC (olddecl
))
1786 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1787 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1791 /* Merge the section attribute.
1792 We want to issue an error if the sections conflict but that must be
1793 done later in decl_attributes since we are called before attributes
1795 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1796 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1798 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1800 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1801 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1802 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1803 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1804 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1805 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1806 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1807 DECL_IS_PURE (newdecl
) |= DECL_IS_PURE (olddecl
);
1808 /* Keep the old RTL. */
1809 COPY_DECL_RTL (olddecl
, newdecl
);
1811 else if (TREE_CODE (newdecl
) == VAR_DECL
1812 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1814 /* Keep the old RTL. We cannot keep the old RTL if the old
1815 declaration was for an incomplete object and the new
1816 declaration is not since many attributes of the RTL will
1818 COPY_DECL_RTL (olddecl
, newdecl
);
1821 /* If cannot merge, then use the new type and qualifiers,
1822 and don't preserve the old rtl. */
1825 /* Clean out any memory we had of the old declaration. */
1826 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1828 TREE_VALUE (oldstatic
) = error_mark_node
;
1830 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1831 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1832 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1833 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1836 /* Merge the storage class information. */
1837 merge_weak (newdecl
, olddecl
);
1839 DECL_ONE_ONLY (newdecl
) |= DECL_ONE_ONLY (olddecl
);
1840 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1841 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1842 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1843 if (! DECL_EXTERNAL (olddecl
))
1844 DECL_EXTERNAL (newdecl
) = 0;
1846 new_template
= NULL_TREE
;
1847 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1849 bool old_decl_gnu_inline
;
1851 if ((DECL_INTERFACE_KNOWN (olddecl
)
1852 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
1853 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
1854 && TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
))
1858 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
1859 fn
= DECL_TEMPLATE_RESULT (olddecl
);
1861 old_decl_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
1864 old_decl_gnu_inline
= false;
1866 if (!old_decl_gnu_inline
)
1868 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1869 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1870 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1872 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1873 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1875 /* If the OLDDECL is an instantiation and/or specialization,
1876 then the NEWDECL must be too. But, it may not yet be marked
1877 as such if the caller has created NEWDECL, but has not yet
1878 figured out that it is a redeclaration. */
1879 if (!DECL_USE_TEMPLATE (newdecl
))
1880 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
1882 /* Don't really know how much of the language-specific
1883 values we should copy from old to new. */
1884 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
1885 DECL_LANG_SPECIFIC (newdecl
)->decl_flags
.u2
=
1886 DECL_LANG_SPECIFIC (olddecl
)->decl_flags
.u2
;
1887 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
1888 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
1889 if (DECL_TEMPLATE_INFO (newdecl
))
1890 new_template
= DECL_TI_TEMPLATE (newdecl
);
1891 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
1892 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
1893 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
1894 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1895 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1896 && DECL_HIDDEN_FRIEND_P (olddecl
)
1897 && newdecl_is_friend
);
1899 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1900 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1901 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
1903 DECL_BEFRIENDING_CLASSES (newdecl
)
1904 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
1905 DECL_BEFRIENDING_CLASSES (olddecl
));
1906 /* DECL_THUNKS is only valid for virtual functions,
1907 otherwise it is a DECL_FRIEND_CONTEXT. */
1908 if (DECL_VIRTUAL_P (newdecl
))
1909 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
1913 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1915 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
1916 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
1918 /* If newdecl is not a specialization, then it is not a
1919 template-related function at all. And that means that we
1920 should have exited above, returning 0. */
1921 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
1923 if (TREE_USED (olddecl
))
1924 /* From [temp.expl.spec]:
1926 If a template, a member template or the member of a class
1927 template is explicitly specialized then that
1928 specialization shall be declared before the first use of
1929 that specialization that would cause an implicit
1930 instantiation to take place, in every translation unit in
1931 which such a use occurs. */
1932 error ("explicit specialization of %qD after first use",
1935 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
1937 /* Don't propagate visibility from the template to the
1938 specialization here. We'll do that in determine_visibility if
1940 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
1942 /* [temp.expl.spec/14] We don't inline explicit specialization
1943 just because the primary template says so. */
1945 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
1947 /* C++ is always in in unit-at-a-time mode, so we never
1948 inline re-defined extern inline functions. */
1949 DECL_INLINE (newdecl
) = 0;
1950 DECL_UNINLINABLE (newdecl
) = 1;
1954 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
1955 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
1957 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
1959 /* If either decl says `inline', this fn is inline, unless
1960 its definition was passed already. */
1961 if (DECL_INLINE (newdecl
) && DECL_INITIAL (olddecl
) == NULL_TREE
)
1962 DECL_INLINE (olddecl
) = 1;
1963 DECL_INLINE (newdecl
) = DECL_INLINE (olddecl
);
1965 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
1966 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
1968 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
1969 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
1970 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
1971 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
1974 /* Preserve abstractness on cloned [cd]tors. */
1975 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
1979 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1980 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
1981 COPY_DECL_RTL (newdecl
, olddecl
);
1983 if (! types_match
|| new_defines_function
)
1985 /* These need to be copied so that the names are available.
1986 Note that if the types do match, we'll preserve inline
1987 info and other bits, but if not, we won't. */
1988 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
1989 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
1991 if (new_defines_function
)
1992 /* If defining a function declared with other language
1993 linkage, use the previously declared language linkage. */
1994 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1995 else if (types_match
)
1997 /* If redeclaring a builtin function, and not a definition,
1998 it stays built in. */
1999 if (DECL_BUILT_IN (olddecl
))
2001 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2002 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2003 /* If we're keeping the built-in definition, keep the rtl,
2004 regardless of declaration matches. */
2005 COPY_DECL_RTL (olddecl
, newdecl
);
2008 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2009 /* Don't clear out the arguments if we're redefining a function. */
2010 if (DECL_ARGUMENTS (olddecl
))
2011 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2014 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2015 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2017 /* Now preserve various other info from the definition. */
2018 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2019 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2020 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2021 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2023 /* Warn about conflicting visibility specifications. */
2024 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2025 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2026 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2028 warning (OPT_Wattributes
, "%q+D: visibility attribute ignored "
2029 "because it", newdecl
);
2030 warning (OPT_Wattributes
, "%Jconflicts with previous "
2031 "declaration here", olddecl
);
2033 /* Choose the declaration which specified visibility. */
2034 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2036 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2037 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2039 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2040 so keep this behavior. */
2041 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
2043 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2044 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2047 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2048 with that from NEWDECL below. */
2049 if (DECL_LANG_SPECIFIC (olddecl
))
2051 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2052 != DECL_LANG_SPECIFIC (newdecl
));
2053 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2056 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2060 function_size
= sizeof (struct tree_decl_common
);
2062 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2063 (char *) newdecl
+ sizeof (struct tree_common
),
2064 function_size
- sizeof (struct tree_common
));
2066 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2067 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2068 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2070 /* If newdecl is a template instantiation, it is possible that
2071 the following sequence of events has occurred:
2073 o A friend function was declared in a class template. The
2074 class template was instantiated.
2076 o The instantiation of the friend declaration was
2077 recorded on the instantiation list, and is newdecl.
2079 o Later, however, instantiate_class_template called pushdecl
2080 on the newdecl to perform name injection. But, pushdecl in
2081 turn called duplicate_decls when it discovered that another
2082 declaration of a global function with the same name already
2085 o Here, in duplicate_decls, we decided to clobber newdecl.
2087 If we're going to do that, we'd better make sure that
2088 olddecl, and not newdecl, is on the list of
2089 instantiations so that if we try to do the instantiation
2090 again we won't get the clobbered declaration. */
2091 reregister_specialization (newdecl
,
2097 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2098 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2099 (char *) newdecl
+ sizeof (struct tree_common
),
2100 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2101 switch (TREE_CODE (olddecl
))
2111 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2112 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2113 size
- sizeof (struct tree_decl_common
)
2114 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2118 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2119 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2120 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2121 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2125 DECL_UID (olddecl
) = olddecl_uid
;
2127 DECL_FRIEND_P (olddecl
) = 1;
2130 DECL_ANTICIPATED (olddecl
) = 1;
2131 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2134 /* NEWDECL contains the merged attribute lists.
2135 Update OLDDECL to be the same. */
2136 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2138 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2139 so that encode_section_info has a chance to look at the new decl
2140 flags and attributes. */
2141 if (DECL_RTL_SET_P (olddecl
)
2142 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2143 || (TREE_CODE (olddecl
) == VAR_DECL
2144 && TREE_STATIC (olddecl
))))
2145 make_decl_rtl (olddecl
);
2147 /* The NEWDECL will no longer be needed. Because every out-of-class
2148 declaration of a member results in a call to duplicate_decls,
2149 freeing these nodes represents in a significant savings. */
2155 /* Return zero if the declaration NEWDECL is valid
2156 when the declaration OLDDECL (assumed to be for the same name)
2157 has already been seen.
2158 Otherwise return an error message format string with a %s
2159 where the identifier should go. */
2162 redeclaration_error_message (tree newdecl
, tree olddecl
)
2164 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2166 /* Because C++ can put things into name space for free,
2167 constructs like "typedef struct foo { ... } foo"
2168 would look like an erroneous redeclaration. */
2169 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2172 return "redefinition of %q#D";
2174 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2176 /* If this is a pure function, its olddecl will actually be
2177 the original initialization to `0' (which we force to call
2178 abort()). Don't complain about redefinition in this case. */
2179 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2180 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2183 /* If both functions come from different namespaces, this is not
2184 a redeclaration - this is a conflict with a used function. */
2185 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2186 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2187 && ! decls_match (olddecl
, newdecl
))
2188 return "%qD conflicts with used function";
2190 /* We'll complain about linkage mismatches in
2191 warn_extern_redeclared_static. */
2193 /* Defining the same name twice is no good. */
2194 if (DECL_INITIAL (olddecl
) != NULL_TREE
2195 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2197 if (DECL_NAME (olddecl
) == NULL_TREE
)
2198 return "%q#D not declared in class";
2199 else if (!GNU_INLINE_P (olddecl
)
2200 || GNU_INLINE_P (newdecl
))
2201 return "redefinition of %q#D";
2204 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2206 bool olda
= GNU_INLINE_P (olddecl
);
2207 bool newa
= GNU_INLINE_P (newdecl
);
2212 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2214 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2220 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2224 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2226 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2227 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2228 return "redefinition of %q#D";
2232 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2233 || (DECL_TEMPLATE_RESULT (newdecl
)
2234 == DECL_TEMPLATE_RESULT (olddecl
)))
2237 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2238 if (DECL_TEMPLATE_INFO (nt
))
2239 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2240 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2241 if (DECL_TEMPLATE_INFO (ot
))
2242 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2243 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2244 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2245 return "redefinition of %q#D";
2247 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2249 bool olda
= GNU_INLINE_P (ot
);
2250 bool newa
= GNU_INLINE_P (nt
);
2255 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2257 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2261 /* Core issue #226 (C++0x):
2263 If a friend function template declaration specifies a
2264 default template-argument, that declaration shall be a
2265 definition and shall be the only declaration of the
2266 function template in the translation unit. */
2267 if ((cxx_dialect
!= cxx98
)
2268 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2269 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2270 /*is_primary=*/1, /*is_partial=*/0,
2271 /*is_friend_decl=*/2))
2272 return "redeclaration of friend %q#D may not have default template arguments";
2276 else if (TREE_CODE (newdecl
) == VAR_DECL
2277 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2278 && (! DECL_LANG_SPECIFIC (olddecl
)
2279 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2280 || DECL_THREAD_LOCAL_P (newdecl
)))
2282 /* Only variables can be thread-local, and all declarations must
2283 agree on this property. */
2284 if (DECL_THREAD_LOCAL_P (newdecl
))
2285 return "thread-local declaration of %q#D follows "
2286 "non-thread-local declaration";
2288 return "non-thread-local declaration of %q#D follows "
2289 "thread-local declaration";
2291 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2293 /* The objects have been declared at namespace scope. If either
2294 is a member of an anonymous union, then this is an invalid
2295 redeclaration. For example:
2301 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2302 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2303 return "redeclaration of %q#D";
2304 /* If at least one declaration is a reference, there is no
2305 conflict. For example:
2311 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2313 /* Reject two definitions. */
2314 return "redefinition of %q#D";
2318 /* Objects declared with block scope: */
2319 /* Reject two definitions, and reject a definition
2320 together with an external reference. */
2321 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2322 return "redeclaration of %q#D";
2327 /* Hash and equality functions for the named_label table. */
2330 named_label_entry_hash (const void *data
)
2332 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2333 return DECL_UID (ent
->label_decl
);
2337 named_label_entry_eq (const void *a
, const void *b
)
2339 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2340 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2341 return ent_a
->label_decl
== ent_b
->label_decl
;
2344 /* Create a new label, named ID. */
2347 make_label_decl (tree id
, int local_p
)
2349 struct named_label_entry
*ent
;
2353 decl
= build_decl (LABEL_DECL
, id
, void_type_node
);
2355 DECL_CONTEXT (decl
) = current_function_decl
;
2356 DECL_MODE (decl
) = VOIDmode
;
2357 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2359 /* Say where one reference is to the label, for the sake of the
2360 error if it is not defined. */
2361 DECL_SOURCE_LOCATION (decl
) = input_location
;
2363 /* Record the fact that this identifier is bound to this label. */
2364 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2366 /* Create the label htab for the function on demand. */
2368 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2369 named_label_entry_eq
, NULL
);
2371 /* Record this label on the list of labels used in this function.
2372 We do this before calling make_label_decl so that we get the
2373 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2374 ent
= GGC_CNEW (struct named_label_entry
);
2375 ent
->label_decl
= decl
;
2377 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2378 gcc_assert (*slot
== NULL
);
2384 /* Look for a label named ID in the current function. If one cannot
2385 be found, create one. (We keep track of used, but undefined,
2386 labels, and complain about them at the end of a function.) */
2389 lookup_label (tree id
)
2393 timevar_push (TV_NAME_LOOKUP
);
2394 /* You can't use labels at global scope. */
2395 if (current_function_decl
== NULL_TREE
)
2397 error ("label %qE referenced outside of any function", id
);
2398 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, NULL_TREE
);
2401 /* See if we've already got this label. */
2402 decl
= IDENTIFIER_LABEL_VALUE (id
);
2403 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2404 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2406 decl
= make_label_decl (id
, /*local_p=*/0);
2407 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2410 /* Declare a local label named ID. */
2413 declare_local_label (tree id
)
2417 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2418 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2419 shadow
= tree_cons (IDENTIFIER_LABEL_VALUE (id
), NULL_TREE
,
2420 current_binding_level
->shadowed_labels
);
2421 current_binding_level
->shadowed_labels
= shadow
;
2423 decl
= make_label_decl (id
, /*local_p=*/1);
2424 TREE_VALUE (shadow
) = decl
;
2429 /* Returns nonzero if it is ill-formed to jump past the declaration of
2430 DECL. Returns 2 if it's also a real problem. */
2433 decl_jump_unsafe (tree decl
)
2435 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2436 || TREE_TYPE (decl
) == error_mark_node
)
2439 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
2440 || DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2443 if (pod_type_p (TREE_TYPE (decl
)))
2446 /* The POD stuff is just pedantry; why should it matter if the class
2447 contains a field of pointer to member type? */
2451 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2454 identify_goto (tree decl
, const location_t
*locus
)
2457 pedwarn ("jump to label %qD", decl
);
2459 pedwarn ("jump to case label");
2461 pedwarn ("%H from here", locus
);
2464 /* Check that a single previously seen jump to a newly defined label
2465 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2466 the jump context; NAMES are the names in scope in LEVEL at the jump
2467 context; LOCUS is the source position of the jump or 0. Returns
2468 true if all is well. */
2471 check_previous_goto_1 (tree decl
, struct cp_binding_level
* level
, tree names
,
2472 bool exited_omp
, const location_t
*locus
)
2474 struct cp_binding_level
*b
;
2475 bool identified
= false, saw_eh
= false, saw_omp
= false;
2479 identify_goto (decl
, locus
);
2480 error (" exits OpenMP structured block");
2481 identified
= saw_omp
= true;
2484 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2486 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2488 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2489 new_decls
= TREE_CHAIN (new_decls
))
2491 int problem
= decl_jump_unsafe (new_decls
);
2497 identify_goto (decl
, locus
);
2501 error (" crosses initialization of %q+#D", new_decls
);
2503 pedwarn (" enters scope of non-POD %q+#D", new_decls
);
2508 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2512 identify_goto (decl
, locus
);
2515 if (b
->kind
== sk_try
)
2516 error (" enters try block");
2518 error (" enters catch block");
2521 if (b
->kind
== sk_omp
&& !saw_omp
)
2525 identify_goto (decl
, locus
);
2528 error (" enters OpenMP structured block");
2537 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2539 check_previous_goto_1 (decl
, use
->binding_level
,
2540 use
->names_in_scope
, use
->in_omp_scope
,
2541 &use
->o_goto_locus
);
2545 check_switch_goto (struct cp_binding_level
* level
)
2547 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2550 /* Check that a new jump to a label DECL is OK. Called by
2551 finish_goto_stmt. */
2554 check_goto (tree decl
)
2556 struct named_label_entry
*ent
, dummy
;
2557 bool saw_catch
= false, identified
= false;
2560 /* We can't know where a computed goto is jumping.
2561 So we assume that it's OK. */
2562 if (TREE_CODE (decl
) != LABEL_DECL
)
2565 /* We didn't record any information about this label when we created it,
2566 and there's not much point since it's trivial to analyze as a return. */
2567 if (decl
== cdtor_label
)
2570 dummy
.label_decl
= decl
;
2571 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2572 gcc_assert (ent
!= NULL
);
2574 /* If the label hasn't been defined yet, defer checking. */
2575 if (! DECL_INITIAL (decl
))
2577 struct named_label_use_entry
*new_use
;
2579 /* Don't bother creating another use if the last goto had the
2580 same data, and will therefore create the same set of errors. */
2582 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2585 new_use
= GGC_NEW (struct named_label_use_entry
);
2586 new_use
->binding_level
= current_binding_level
;
2587 new_use
->names_in_scope
= current_binding_level
->names
;
2588 new_use
->o_goto_locus
= input_location
;
2589 new_use
->in_omp_scope
= false;
2591 new_use
->next
= ent
->uses
;
2592 ent
->uses
= new_use
;
2596 if (ent
->in_try_scope
|| ent
->in_catch_scope
2597 || ent
->in_omp_scope
|| ent
->bad_decls
)
2599 pedwarn ("jump to label %q+D", decl
);
2600 pedwarn (" from here");
2604 for (bad
= ent
->bad_decls
; bad
; bad
= TREE_CHAIN (bad
))
2606 tree b
= TREE_VALUE (bad
);
2607 int u
= decl_jump_unsafe (b
);
2609 if (u
> 1 && DECL_ARTIFICIAL (b
))
2611 /* Can't skip init of __exception_info. */
2612 error ("%J enters catch block", b
);
2616 error (" skips initialization of %q+#D", b
);
2618 pedwarn (" enters scope of non-POD %q+#D", b
);
2621 if (ent
->in_try_scope
)
2622 error (" enters try block");
2623 else if (ent
->in_catch_scope
&& !saw_catch
)
2624 error (" enters catch block");
2626 if (ent
->in_omp_scope
)
2627 error (" enters OpenMP structured block");
2628 else if (flag_openmp
)
2630 struct cp_binding_level
*b
;
2631 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2633 if (b
== ent
->binding_level
)
2635 if (b
->kind
== sk_omp
)
2639 pedwarn ("jump to label %q+D", decl
);
2640 pedwarn (" from here");
2643 error (" exits OpenMP structured block");
2650 /* Check that a return is ok wrt OpenMP structured blocks.
2651 Called by finish_return_stmt. Returns true if all is well. */
2654 check_omp_return (void)
2656 struct cp_binding_level
*b
;
2657 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2658 if (b
->kind
== sk_omp
)
2660 error ("invalid exit from OpenMP structured block");
2666 /* Define a label, specifying the location in the source file.
2667 Return the LABEL_DECL node for the label. */
2670 define_label (location_t location
, tree name
)
2672 struct named_label_entry
*ent
, dummy
;
2673 struct cp_binding_level
*p
;
2676 timevar_push (TV_NAME_LOOKUP
);
2678 decl
= lookup_label (name
);
2680 dummy
.label_decl
= decl
;
2681 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2682 gcc_assert (ent
!= NULL
);
2684 /* After labels, make any new cleanups in the function go into their
2685 own new (temporary) binding contour. */
2686 for (p
= current_binding_level
;
2687 p
->kind
!= sk_function_parms
;
2689 p
->more_cleanups_ok
= 0;
2691 if (name
== get_identifier ("wchar_t"))
2692 pedwarn ("label named wchar_t");
2694 if (DECL_INITIAL (decl
) != NULL_TREE
)
2696 error ("duplicate label %qD", decl
);
2697 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
2701 struct named_label_use_entry
*use
;
2703 /* Mark label as having been defined. */
2704 DECL_INITIAL (decl
) = error_mark_node
;
2705 /* Say where in the source. */
2706 DECL_SOURCE_LOCATION (decl
) = location
;
2708 ent
->binding_level
= current_binding_level
;
2709 ent
->names_in_scope
= current_binding_level
->names
;
2711 for (use
= ent
->uses
; use
; use
= use
->next
)
2712 check_previous_goto (decl
, use
);
2716 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2721 struct cp_binding_level
*level
;
2722 struct cp_switch
*next
;
2723 /* The SWITCH_STMT being built. */
2725 /* A splay-tree mapping the low element of a case range to the high
2726 element, or NULL_TREE if there is no high element. Used to
2727 determine whether or not a new case label duplicates an old case
2728 label. We need a tree, rather than simply a hash table, because
2729 of the GNU case range extension. */
2733 /* A stack of the currently active switch statements. The innermost
2734 switch statement is on the top of the stack. There is no need to
2735 mark the stack for garbage collection because it is only active
2736 during the processing of the body of a function, and we never
2737 collect at that point. */
2739 static struct cp_switch
*switch_stack
;
2741 /* Called right after a switch-statement condition is parsed.
2742 SWITCH_STMT is the switch statement being parsed. */
2745 push_switch (tree switch_stmt
)
2747 struct cp_switch
*p
= XNEW (struct cp_switch
);
2748 p
->level
= current_binding_level
;
2749 p
->next
= switch_stack
;
2750 p
->switch_stmt
= switch_stmt
;
2751 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2758 struct cp_switch
*cs
= switch_stack
;
2759 location_t switch_location
;
2761 /* Emit warnings as needed. */
2762 if (EXPR_HAS_LOCATION (cs
->switch_stmt
))
2763 switch_location
= EXPR_LOCATION (cs
->switch_stmt
);
2765 switch_location
= input_location
;
2766 if (!processing_template_decl
)
2767 c_do_switch_warnings (cs
->cases
, switch_location
,
2768 SWITCH_STMT_TYPE (cs
->switch_stmt
),
2769 SWITCH_STMT_COND (cs
->switch_stmt
));
2771 splay_tree_delete (cs
->cases
);
2772 switch_stack
= switch_stack
->next
;
2776 /* Note that we've seen a definition of a case label, and complain if this
2777 is a bad place for one. */
2780 finish_case_label (tree low_value
, tree high_value
)
2783 struct cp_binding_level
*p
;
2785 if (processing_template_decl
)
2789 /* For templates, just add the case label; we'll do semantic
2790 analysis at instantiation-time. */
2791 label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2792 return add_stmt (build_case_label (low_value
, high_value
, label
));
2795 /* Find the condition on which this switch statement depends. */
2796 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
2797 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
2798 cond
= TREE_VALUE (cond
);
2800 if (!check_switch_goto (switch_stack
->level
))
2801 return error_mark_node
;
2803 r
= c_add_case_label (switch_stack
->cases
, cond
, TREE_TYPE (cond
),
2804 low_value
, high_value
);
2806 /* After labels, make any new cleanups in the function go into their
2807 own new (temporary) binding contour. */
2808 for (p
= current_binding_level
;
2809 p
->kind
!= sk_function_parms
;
2811 p
->more_cleanups_ok
= 0;
2816 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2819 typename_hash (const void* k
)
2822 const_tree
const t
= (const_tree
) k
;
2824 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
2825 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
2830 typedef struct typename_info
{
2838 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2839 really of type `typename_info*' */
2842 typename_compare (const void * k1
, const void * k2
)
2844 const_tree
const t1
= (const_tree
) k1
;
2845 const typename_info
*const t2
= (const typename_info
*) k2
;
2847 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
2848 && TYPE_CONTEXT (t1
) == t2
->scope
2849 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
2850 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
2851 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
2854 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2855 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2857 Returns the new TYPENAME_TYPE. */
2859 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
2862 build_typename_type (tree context
, tree name
, tree fullname
,
2863 enum tag_types tag_type
)
2871 if (typename_htab
== NULL
)
2872 typename_htab
= htab_create_ggc (61, &typename_hash
,
2873 &typename_compare
, NULL
);
2875 ti
.scope
= FROB_CONTEXT (context
);
2877 ti
.template_id
= fullname
;
2878 ti
.enum_p
= tag_type
== enum_type
;
2879 ti
.class_p
= (tag_type
== class_type
2880 || tag_type
== record_type
2881 || tag_type
== union_type
);
2882 hash
= (htab_hash_pointer (ti
.scope
)
2883 ^ htab_hash_pointer (ti
.name
));
2885 /* See if we already have this type. */
2886 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
2891 /* Build the TYPENAME_TYPE. */
2892 t
= make_aggr_type (TYPENAME_TYPE
);
2893 TYPE_CONTEXT (t
) = ti
.scope
;
2894 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
2895 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
2896 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
2898 /* Build the corresponding TYPE_DECL. */
2899 d
= build_decl (TYPE_DECL
, name
, t
);
2900 TYPE_NAME (TREE_TYPE (d
)) = d
;
2901 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2902 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2903 DECL_ARTIFICIAL (d
) = 1;
2905 /* Store it in the hash table. */
2908 /* TYPENAME_TYPEs must always be compared structurally, because
2909 they may or may not resolve down to another type depending on
2910 the currently open classes. */
2911 SET_TYPE_STRUCTURAL_EQUALITY (t
);
2917 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2918 provided to name the type. Returns an appropriate type, unless an
2919 error occurs, in which case error_mark_node is returned. If we
2920 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2921 return that, rather than the _TYPE it corresponds to, in other
2922 cases we look through the type decl. If TF_ERROR is set, complain
2923 about errors, otherwise be quiet. */
2926 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
2927 tsubst_flags_t complain
)
2933 if (name
== error_mark_node
2934 || context
== NULL_TREE
2935 || context
== error_mark_node
)
2936 return error_mark_node
;
2940 if (!(TYPE_LANG_SPECIFIC (name
)
2941 && (CLASSTYPE_IS_TEMPLATE (name
)
2942 || CLASSTYPE_USE_TEMPLATE (name
))))
2943 name
= TYPE_IDENTIFIER (name
);
2945 /* Create a TEMPLATE_ID_EXPR for the type. */
2946 name
= build_nt (TEMPLATE_ID_EXPR
,
2947 CLASSTYPE_TI_TEMPLATE (name
),
2948 CLASSTYPE_TI_ARGS (name
));
2950 else if (TREE_CODE (name
) == TYPE_DECL
)
2951 name
= DECL_NAME (name
);
2955 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
2957 name
= TREE_OPERAND (name
, 0);
2958 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2959 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
2960 else if (TREE_CODE (name
) == OVERLOAD
)
2962 error ("%qD is not a type", name
);
2963 return error_mark_node
;
2966 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2968 error ("%qD used without template parameters", name
);
2969 return error_mark_node
;
2971 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
2972 gcc_assert (TYPE_P (context
));
2974 /* When the CONTEXT is a dependent type, NAME could refer to a
2975 dependent base class of CONTEXT. So we cannot peek inside it,
2976 even if CONTEXT is a currently open scope. */
2977 if (dependent_type_p (context
))
2978 return build_typename_type (context
, name
, fullname
, tag_type
);
2980 if (!IS_AGGR_TYPE (context
))
2982 if (complain
& tf_error
)
2983 error ("%q#T is not a class", context
);
2984 return error_mark_node
;
2987 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
2989 /* We should only set WANT_TYPE when we're a nested typename type.
2990 Then we can give better diagnostics if we find a non-type. */
2991 t
= lookup_field (context
, name
, 0, /*want_type=*/true);
2994 if (complain
& tf_error
)
2995 error (want_template
? "no class template named %q#T in %q#T"
2996 : "no type named %q#T in %q#T", name
, context
);
2997 return error_mark_node
;
3000 if (want_template
&& !DECL_CLASS_TEMPLATE_P (t
))
3002 if (complain
& tf_error
)
3003 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3005 return error_mark_node
;
3007 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3009 if (complain
& tf_error
)
3010 error ("%<typename %T::%D%> names %q#T, which is not a type",
3012 return error_mark_node
;
3015 if (complain
& tf_error
)
3016 perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
);
3019 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3021 /*entering_scope=*/0,
3022 tf_warning_or_error
| tf_user
);
3024 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3030 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3031 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3032 in which case error_mark_node is returned.
3034 If PARM_LIST is non-NULL, also make sure that the template parameter
3035 list of TEMPLATE_DECL matches.
3037 If COMPLAIN zero, don't complain about any errors that occur. */
3040 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3041 tsubst_flags_t complain
)
3047 name
= TYPE_IDENTIFIER (name
);
3048 else if (DECL_P (name
))
3049 name
= DECL_NAME (name
);
3050 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3052 if (!dependent_type_p (context
)
3053 || currently_open_class (context
))
3055 tree tmpl
= NULL_TREE
;
3057 if (IS_AGGR_TYPE (context
))
3058 tmpl
= lookup_field (context
, name
, 0, false);
3060 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
3062 if (complain
& tf_error
)
3063 error ("no class template named %q#T in %q#T", name
, context
);
3064 return error_mark_node
;
3068 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3070 if (complain
& tf_error
)
3072 error ("template parameters do not match template");
3073 error ("%q+D declared here", tmpl
);
3075 return error_mark_node
;
3078 if (complain
& tf_error
)
3079 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
);
3084 /* Build the UNBOUND_CLASS_TEMPLATE. */
3085 t
= make_aggr_type (UNBOUND_CLASS_TEMPLATE
);
3086 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3087 TREE_TYPE (t
) = NULL_TREE
;
3088 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3090 /* Build the corresponding TEMPLATE_DECL. */
3091 d
= build_decl (TEMPLATE_DECL
, name
, t
);
3092 TYPE_NAME (TREE_TYPE (d
)) = d
;
3093 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3094 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3095 DECL_ARTIFICIAL (d
) = 1;
3096 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3103 /* Push the declarations of builtin types into the namespace.
3104 RID_INDEX is the index of the builtin type in the array
3105 RID_POINTERS. NAME is the name used when looking up the builtin
3106 type. TYPE is the _TYPE node for the builtin type. */
3109 record_builtin_type (enum rid rid_index
,
3113 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3114 tree tdecl
= NULL_TREE
;
3116 if ((int) rid_index
< (int) RID_MAX
)
3117 rname
= ridpointers
[(int) rid_index
];
3119 tname
= get_identifier (name
);
3121 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3122 eliminated. Built-in types should not be looked up name; their
3123 names are keywords that the parser can recognize. However, there
3124 is code in c-common.c that uses identifier_global_value to look
3125 up built-in types by name. */
3128 tdecl
= build_decl (TYPE_DECL
, tname
, type
);
3129 DECL_ARTIFICIAL (tdecl
) = 1;
3130 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3136 tdecl
= build_decl (TYPE_DECL
, rname
, type
);
3137 DECL_ARTIFICIAL (tdecl
) = 1;
3139 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3142 if (!TYPE_NAME (type
))
3143 TYPE_NAME (type
) = tdecl
;
3146 debug_hooks
->type_decl (tdecl
, 0);
3149 /* Record one of the standard Java types.
3150 * Declare it as having the given NAME.
3151 * If SIZE > 0, it is the size of one of the integral types;
3152 * otherwise it is the negative of the size of one of the other types. */
3155 record_builtin_java_type (const char* name
, int size
)
3159 type
= make_signed_type (size
);
3160 else if (size
> -32)
3161 { /* "__java_char" or ""__java_boolean". */
3162 type
= make_unsigned_type (-size
);
3163 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3166 { /* "__java_float" or ""__java_double". */
3167 type
= make_node (REAL_TYPE
);
3168 TYPE_PRECISION (type
) = - size
;
3171 record_builtin_type (RID_MAX
, name
, type
);
3172 decl
= TYPE_NAME (type
);
3174 /* Suppress generate debug symbol entries for these types,
3175 since for normal C++ they are just clutter.
3176 However, push_lang_context undoes this if extern "Java" is seen. */
3177 DECL_IGNORED_P (decl
) = 1;
3179 TYPE_FOR_JAVA (type
) = 1;
3183 /* Push a type into the namespace so that the back ends ignore it. */
3186 record_unknown_type (tree type
, const char* name
)
3188 tree decl
= pushdecl (build_decl (TYPE_DECL
, get_identifier (name
), type
));
3189 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3190 DECL_IGNORED_P (decl
) = 1;
3191 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3192 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3193 TYPE_ALIGN (type
) = 1;
3194 TYPE_USER_ALIGN (type
) = 0;
3195 TYPE_MODE (type
) = TYPE_MODE (void_type_node
);
3198 /* A string for which we should create an IDENTIFIER_NODE at
3201 typedef struct predefined_identifier
3203 /* The name of the identifier. */
3204 const char *const name
;
3205 /* The place where the IDENTIFIER_NODE should be stored. */
3207 /* Nonzero if this is the name of a constructor or destructor. */
3208 const int ctor_or_dtor_p
;
3209 } predefined_identifier
;
3211 /* Create all the predefined identifiers. */
3214 initialize_predefined_identifiers (void)
3216 const predefined_identifier
*pid
;
3218 /* A table of identifiers to create at startup. */
3219 static const predefined_identifier predefined_identifiers
[] = {
3220 { "C++", &lang_name_cplusplus
, 0 },
3221 { "C", &lang_name_c
, 0 },
3222 { "Java", &lang_name_java
, 0 },
3223 /* Some of these names have a trailing space so that it is
3224 impossible for them to conflict with names written by users. */
3225 { "__ct ", &ctor_identifier
, 1 },
3226 { "__base_ctor ", &base_ctor_identifier
, 1 },
3227 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3228 { "__dt ", &dtor_identifier
, 1 },
3229 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3230 { "__base_dtor ", &base_dtor_identifier
, 1 },
3231 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3232 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3233 { "nelts", &nelts_identifier
, 0 },
3234 { THIS_NAME
, &this_identifier
, 0 },
3235 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3236 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3237 { "_vptr", &vptr_identifier
, 0 },
3238 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3239 { "::", &global_scope_name
, 0 },
3240 { "std", &std_identifier
, 0 },
3244 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3246 *pid
->node
= get_identifier (pid
->name
);
3247 if (pid
->ctor_or_dtor_p
)
3248 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3252 /* Create the predefined scalar types of C,
3253 and some nodes representing standard constants (0, 1, (void *)0).
3254 Initialize the global binding level.
3255 Make definitions for built-in primitive functions. */
3258 cxx_init_decl_processing (void)
3261 tree void_ftype_ptr
;
3263 build_common_tree_nodes (flag_signed_char
, false);
3265 /* Create all the identifiers we need. */
3266 initialize_predefined_identifiers ();
3268 /* Create the global variables. */
3269 push_to_top_level ();
3271 current_function_decl
= NULL_TREE
;
3272 current_binding_level
= NULL
;
3273 /* Enter the global namespace. */
3274 gcc_assert (global_namespace
== NULL_TREE
);
3275 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3277 TREE_PUBLIC (global_namespace
) = 1;
3278 begin_scope (sk_namespace
, global_namespace
);
3280 current_lang_name
= NULL_TREE
;
3282 if (flag_visibility_ms_compat
)
3283 default_visibility
= VISIBILITY_HIDDEN
;
3286 current_lang_name
= lang_name_c
;
3288 /* Create the `std' namespace. */
3289 push_namespace (std_identifier
);
3290 std_node
= current_namespace
;
3293 c_common_nodes_and_builtins ();
3295 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3296 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3297 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3298 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3299 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3300 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3301 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3302 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3304 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3305 integer_three_node
= build_int_cst (NULL_TREE
, 3);
3307 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3308 truthvalue_type_node
= boolean_type_node
;
3309 truthvalue_false_node
= boolean_false_node
;
3310 truthvalue_true_node
= boolean_true_node
;
3312 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3315 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3318 delta_type_node
= ptrdiff_type_node
;
3319 vtable_index_type
= ptrdiff_type_node
;
3321 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3322 void_ftype
= build_function_type (void_type_node
, void_list_node
);
3323 void_ftype_ptr
= build_function_type (void_type_node
,
3324 tree_cons (NULL_TREE
,
3328 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3330 /* C++ extensions */
3332 unknown_type_node
= make_node (UNKNOWN_TYPE
);
3333 record_unknown_type (unknown_type_node
, "unknown type");
3335 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3336 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3338 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3340 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3341 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3344 /* Make sure we get a unique function type, so we can give
3345 its pointer type a name. (This wins for gdb.) */
3346 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3347 TREE_TYPE (vfunc_type
) = integer_type_node
;
3348 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3349 layout_type (vfunc_type
);
3351 vtable_entry_type
= build_pointer_type (vfunc_type
);
3353 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3356 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3357 layout_type (vtbl_type_node
);
3358 vtbl_type_node
= build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3359 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3360 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3361 layout_type (vtbl_ptr_type_node
);
3362 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3364 push_namespace (get_identifier ("__cxxabiv1"));
3365 abi_node
= current_namespace
;
3368 global_type_node
= make_node (LANG_TYPE
);
3369 record_unknown_type (global_type_node
, "global type");
3372 current_lang_name
= lang_name_cplusplus
;
3376 tree bad_alloc_type_node
;
3377 tree bad_alloc_decl
;
3378 tree newtype
, deltype
;
3379 tree ptr_ftype_sizetype
;
3381 push_namespace (std_identifier
);
3382 bad_alloc_id
= get_identifier ("bad_alloc");
3383 bad_alloc_type_node
= make_aggr_type (RECORD_TYPE
);
3384 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3386 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3387 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3388 TYPE_STUB_DECL (bad_alloc_type_node
) = bad_alloc_decl
;
3392 = build_function_type (ptr_type_node
,
3393 tree_cons (NULL_TREE
,
3396 newtype
= build_exception_variant
3397 (ptr_ftype_sizetype
, add_exception_specifier
3398 (NULL_TREE
, bad_alloc_type_node
, -1));
3399 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3400 push_cp_library_fn (NEW_EXPR
, newtype
);
3401 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3402 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3403 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3407 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3409 /* Perform other language dependent initializations. */
3410 init_class_processing ();
3411 init_rtti_processing ();
3413 if (flag_exceptions
)
3414 init_exception_processing ();
3416 if (! supports_one_only ())
3419 make_fname_decl
= cp_make_fname_decl
;
3420 start_fname_decls ();
3422 /* Show we use EH for cleanups. */
3423 if (flag_exceptions
)
3424 using_eh_for_cleanups ();
3427 /* Generate an initializer for a function naming variable from
3428 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3429 filled in with the type of the init. */
3432 cp_fname_init (const char* name
, tree
*type_p
)
3434 tree domain
= NULL_TREE
;
3436 tree init
= NULL_TREE
;
3441 length
= strlen (name
);
3442 domain
= build_index_type (size_int (length
));
3443 init
= build_string (length
+ 1, name
);
3446 type
= build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3447 type
= build_cplus_array_type (type
, domain
);
3452 TREE_TYPE (init
) = type
;
3454 init
= error_mark_node
;
3459 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3460 decl, NAME is the initialization string and TYPE_DEP indicates whether
3461 NAME depended on the type of the function. We make use of that to detect
3462 __PRETTY_FUNCTION__ inside a template fn. This is being done
3463 lazily at the point of first use, so we mustn't push the decl now. */
3466 cp_make_fname_decl (tree id
, int type_dep
)
3468 const char *const name
= (type_dep
&& processing_template_decl
3469 ? NULL
: fname_as_string (type_dep
));
3471 tree init
= cp_fname_init (name
, &type
);
3472 tree decl
= build_decl (VAR_DECL
, id
, type
);
3475 free (CONST_CAST (char *, name
));
3477 /* As we're using pushdecl_with_scope, we must set the context. */
3478 DECL_CONTEXT (decl
) = current_function_decl
;
3479 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3481 TREE_STATIC (decl
) = 1;
3482 TREE_READONLY (decl
) = 1;
3483 DECL_ARTIFICIAL (decl
) = 1;
3485 TREE_USED (decl
) = 1;
3487 if (current_function_decl
)
3489 struct cp_binding_level
*b
= current_binding_level
;
3490 while (b
->level_chain
->kind
!= sk_function_parms
)
3492 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3493 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3494 LOOKUP_ONLYCONVERTING
);
3497 pushdecl_top_level_and_finish (decl
, init
);
3503 builtin_function_1 (tree decl
, tree context
)
3505 tree id
= DECL_NAME (decl
);
3506 const char *name
= IDENTIFIER_POINTER (id
);
3508 retrofit_lang_decl (decl
);
3510 /* All nesting of C++ functions is lexical; there is never a "static
3511 chain" in the sense of GNU C nested functions. */
3512 DECL_NO_STATIC_CHAIN (decl
) = 1;
3514 DECL_ARTIFICIAL (decl
) = 1;
3515 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3516 SET_DECL_LANGUAGE (decl
, lang_c
);
3517 /* Runtime library routines are, by definition, available in an
3518 external shared object. */
3519 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3520 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3522 DECL_CONTEXT (decl
) = context
;
3526 /* A function in the user's namespace should have an explicit
3527 declaration before it is used. Mark the built-in function as
3528 anticipated but not actually declared. */
3529 if (name
[0] != '_' || name
[1] != '_')
3530 DECL_ANTICIPATED (decl
) = 1;
3531 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3533 size_t len
= strlen (name
);
3535 /* Treat __*_chk fortification functions as anticipated as well,
3536 unless they are __builtin_*. */
3537 if (len
> strlen ("___chk")
3538 && memcmp (name
+ len
- strlen ("_chk"),
3539 "_chk", strlen ("_chk") + 1) == 0)
3540 DECL_ANTICIPATED (decl
) = 1;
3547 cxx_builtin_function (tree decl
)
3549 tree id
= DECL_NAME (decl
);
3550 const char *name
= IDENTIFIER_POINTER (id
);
3551 /* All builtins that don't begin with an '_' should additionally
3552 go in the 'std' namespace. */
3555 tree decl2
= copy_node(decl
);
3556 push_namespace (std_identifier
);
3557 builtin_function_1 (decl2
, std_node
);
3561 return builtin_function_1 (decl
, NULL_TREE
);
3564 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3565 function. Not called directly. */
3568 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3570 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3571 DECL_EXTERNAL (fn
) = 1;
3572 TREE_PUBLIC (fn
) = 1;
3573 DECL_ARTIFICIAL (fn
) = 1;
3574 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3575 SET_DECL_LANGUAGE (fn
, lang_c
);
3576 /* Runtime library routines are, by definition, available in an
3577 external shared object. */
3578 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3579 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3583 /* Returns the _DECL for a library function with C linkage.
3584 We assume that such functions never throw; if this is incorrect,
3585 callers should unset TREE_NOTHROW. */
3588 build_library_fn (tree name
, tree type
)
3590 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
3591 TREE_NOTHROW (fn
) = 1;
3595 /* Returns the _DECL for a library function with C++ linkage. */
3598 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3600 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3601 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3602 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3603 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3607 /* Like build_library_fn, but takes a C string instead of an
3611 build_library_fn_ptr (const char* name
, tree type
)
3613 return build_library_fn (get_identifier (name
), type
);
3616 /* Like build_cp_library_fn, but takes a C string instead of an
3620 build_cp_library_fn_ptr (const char* name
, tree type
)
3622 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3625 /* Like build_library_fn, but also pushes the function so that we will
3626 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3629 push_library_fn (tree name
, tree type
)
3631 tree fn
= build_library_fn (name
, type
);
3632 pushdecl_top_level (fn
);
3636 /* Like build_cp_library_fn, but also pushes the function so that it
3637 will be found by normal lookup. */
3640 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3642 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3649 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3653 push_void_library_fn (tree name
, tree parmtypes
)
3655 tree type
= build_function_type (void_type_node
, parmtypes
);
3656 return push_library_fn (name
, type
);
3659 /* Like push_library_fn, but also note that this function throws
3660 and does not return. Used for __throw_foo and the like. */
3663 push_throw_library_fn (tree name
, tree type
)
3665 tree fn
= push_library_fn (name
, type
);
3666 TREE_THIS_VOLATILE (fn
) = 1;
3667 TREE_NOTHROW (fn
) = 0;
3671 /* When we call finish_struct for an anonymous union, we create
3672 default copy constructors and such. But, an anonymous union
3673 shouldn't have such things; this function undoes the damage to the
3674 anonymous union type T.
3676 (The reason that we create the synthesized methods is that we don't
3677 distinguish `union { int i; }' from `typedef union { int i; } U'.
3678 The first is an anonymous union; the second is just an ordinary
3682 fixup_anonymous_aggr (tree t
)
3686 /* Wipe out memory of synthesized methods. */
3687 TYPE_HAS_CONSTRUCTOR (t
) = 0;
3688 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3689 TYPE_HAS_INIT_REF (t
) = 0;
3690 TYPE_HAS_CONST_INIT_REF (t
) = 0;
3691 TYPE_HAS_ASSIGN_REF (t
) = 0;
3692 TYPE_HAS_CONST_ASSIGN_REF (t
) = 0;
3694 /* Splice the implicitly generated functions out of the TYPE_METHODS
3696 q
= &TYPE_METHODS (t
);
3699 if (DECL_ARTIFICIAL (*q
))
3700 *q
= TREE_CHAIN (*q
);
3702 q
= &TREE_CHAIN (*q
);
3705 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3706 if (TYPE_METHODS (t
))
3707 error ("%Jan anonymous union cannot have function members",
3708 TYPE_MAIN_DECL (t
));
3710 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3711 assignment operators (because they cannot have these methods themselves).
3712 For anonymous unions this is already checked because they are not allowed
3713 in any union, otherwise we have to check it. */
3714 if (TREE_CODE (t
) != UNION_TYPE
)
3718 for (field
= TYPE_FIELDS (t
); field
; field
= TREE_CHAIN (field
))
3719 if (TREE_CODE (field
) == FIELD_DECL
)
3721 type
= TREE_TYPE (field
);
3722 if (CLASS_TYPE_P (type
))
3724 if (TYPE_NEEDS_CONSTRUCTING (type
))
3725 error ("member %q+#D with constructor not allowed "
3726 "in anonymous aggregate", field
);
3727 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
3728 error ("member %q+#D with destructor not allowed "
3729 "in anonymous aggregate", field
);
3730 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type
))
3731 error ("member %q+#D with copy assignment operator "
3732 "not allowed in anonymous aggregate", field
);
3738 /* Make sure that a declaration with no declarator is well-formed, i.e.
3739 just declares a tagged type or anonymous union.
3741 Returns the type declared; or NULL_TREE if none. */
3744 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
3746 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
3747 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
3748 /* If a class, struct, or enum type is declared by the DECLSPECS
3749 (i.e, if a class-specifier, enum-specifier, or non-typename
3750 elaborated-type-specifier appears in the DECLSPECS),
3751 DECLARED_TYPE is set to the corresponding type. */
3752 tree declared_type
= NULL_TREE
;
3753 bool error_p
= false;
3755 if (declspecs
->multiple_types_p
)
3756 error ("multiple types in one declaration");
3757 else if (declspecs
->redefined_builtin_type
)
3759 if (!in_system_header
)
3760 pedwarn ("redeclaration of C++ built-in type %qT",
3761 declspecs
->redefined_builtin_type
);
3766 && TYPE_P (declspecs
->type
)
3767 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
3768 && IS_AGGR_TYPE (declspecs
->type
))
3769 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
3770 declared_type
= declspecs
->type
;
3771 else if (declspecs
->type
== error_mark_node
)
3773 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
3774 pedwarn ("declaration does not declare anything");
3775 /* Check for an anonymous union. */
3776 else if (declared_type
&& IS_AGGR_TYPE_CODE (TREE_CODE (declared_type
))
3777 && TYPE_ANONYMOUS_P (declared_type
))
3779 /* 7/3 In a simple-declaration, the optional init-declarator-list
3780 can be omitted only when declaring a class (clause 9) or
3781 enumeration (7.2), that is, when the decl-specifier-seq contains
3782 either a class-specifier, an elaborated-type-specifier with
3783 a class-key (9.1), or an enum-specifier. In these cases and
3784 whenever a class-specifier or enum-specifier is present in the
3785 decl-specifier-seq, the identifiers in these specifiers are among
3786 the names being declared by the declaration (as class-name,
3787 enum-names, or enumerators, depending on the syntax). In such
3788 cases, and except for the declaration of an unnamed bit-field (9.6),
3789 the decl-specifier-seq shall introduce one or more names into the
3790 program, or shall redeclare a name introduced by a previous
3791 declaration. [Example:
3792 enum { }; // ill-formed
3793 typedef class { }; // ill-formed
3797 error ("missing type-name in typedef-declaration");
3800 /* Anonymous unions are objects, so they can have specifiers. */;
3801 SET_ANON_AGGR_TYPE_P (declared_type
);
3803 if (TREE_CODE (declared_type
) != UNION_TYPE
&& pedantic
3804 && !in_system_header
)
3805 pedwarn ("ISO C++ prohibits anonymous structs");
3810 if (declspecs
->specs
[(int)ds_inline
]
3811 || declspecs
->specs
[(int)ds_virtual
])
3812 error ("%qs can only be specified for functions",
3813 declspecs
->specs
[(int)ds_inline
]
3814 ? "inline" : "virtual");
3816 && (!current_class_type
3817 || current_scope () != current_class_type
))
3818 error ("%<friend%> can only be specified inside a class");
3819 else if (declspecs
->specs
[(int)ds_explicit
])
3820 error ("%<explicit%> can only be specified for constructors");
3821 else if (declspecs
->storage_class
)
3822 error ("a storage class can only be specified for objects "
3824 else if (declspecs
->specs
[(int)ds_const
]
3825 || declspecs
->specs
[(int)ds_volatile
]
3826 || declspecs
->specs
[(int)ds_restrict
]
3827 || declspecs
->specs
[(int)ds_thread
])
3828 error ("qualifiers can only be specified for objects "
3830 else if (saw_typedef
)
3831 warning (0, "%<typedef%> was ignored in this declaration");
3834 return declared_type
;
3837 /* Called when a declaration is seen that contains no names to declare.
3838 If its type is a reference to a structure, union or enum inherited
3839 from a containing scope, shadow that tag name for the current scope
3840 with a forward reference.
3841 If its type defines a new named structure or union
3842 or defines an enum, it is valid but we need not do anything here.
3843 Otherwise, it is an error.
3845 C++: may have to grok the declspecs to learn about static,
3846 complain for anonymous unions.
3848 Returns the TYPE declared -- or NULL_TREE if none. */
3851 shadow_tag (cp_decl_specifier_seq
*declspecs
)
3853 tree t
= check_tag_decl (declspecs
);
3858 if (declspecs
->attributes
)
3860 warning (0, "attribute ignored in declaration of %q+#T", t
);
3861 warning (0, "attribute for %q+#T must follow the %qs keyword",
3862 t
, class_key_or_enum_as_string (t
));
3866 if (maybe_process_partial_specialization (t
) == error_mark_node
)
3869 /* This is where the variables in an anonymous union are
3870 declared. An anonymous union declaration looks like:
3872 because there is no declarator after the union, the parser
3873 sends that declaration here. */
3874 if (ANON_AGGR_TYPE_P (t
))
3876 fixup_anonymous_aggr (t
);
3878 if (TYPE_FIELDS (t
))
3880 tree decl
= grokdeclarator (/*declarator=*/NULL
,
3881 declspecs
, NORMAL
, 0, NULL
);
3882 finish_anon_union (decl
);
3889 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3892 groktypename (cp_decl_specifier_seq
*type_specifiers
,
3893 const cp_declarator
*declarator
)
3897 attrs
= type_specifiers
->attributes
;
3898 type_specifiers
->attributes
= NULL_TREE
;
3899 type
= grokdeclarator (declarator
, type_specifiers
, TYPENAME
, 0, &attrs
);
3902 if (CLASS_TYPE_P (type
))
3903 warning (OPT_Wattributes
, "ignoring attributes applied to class type "
3904 "outside of definition");
3906 cplus_decl_attributes (&type
, attrs
, 0);
3911 /* Decode a declarator in an ordinary declaration or data definition.
3912 This is called as soon as the type information and variable name
3913 have been parsed, before parsing the initializer if any.
3914 Here we create the ..._DECL node, fill in its type,
3915 and put it on the list of decls for the current context.
3916 The ..._DECL node is returned as the value.
3918 Exception: for arrays where the length is not specified,
3919 the type is left null, to be filled in by `cp_finish_decl'.
3921 Function definitions do not come here; they go to start_function
3922 instead. However, external and forward declarations of functions
3923 do go through here. Structure field declarations are done by
3924 grokfield and not through here. */
3927 start_decl (const cp_declarator
*declarator
,
3928 cp_decl_specifier_seq
*declspecs
,
3931 tree prefix_attributes
,
3932 tree
*pushed_scope_p
)
3939 *pushed_scope_p
= NULL_TREE
;
3941 /* An object declared as __attribute__((deprecated)) suppresses
3942 warnings of uses of other deprecated items. */
3943 if (lookup_attribute ("deprecated", attributes
))
3944 deprecated_state
= DEPRECATED_SUPPRESS
;
3946 attributes
= chainon (attributes
, prefix_attributes
);
3948 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
3951 deprecated_state
= DEPRECATED_NORMAL
;
3953 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
3954 || decl
== error_mark_node
)
3955 return error_mark_node
;
3957 type
= TREE_TYPE (decl
);
3959 context
= DECL_CONTEXT (decl
);
3963 *pushed_scope_p
= push_scope (context
);
3965 /* We are only interested in class contexts, later. */
3966 if (TREE_CODE (context
) == NAMESPACE_DECL
)
3967 context
= NULL_TREE
;
3971 /* Is it valid for this decl to have an initializer at all?
3972 If not, set INITIALIZED to zero, which will indirectly
3973 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3974 switch (TREE_CODE (decl
))
3977 error ("typedef %qD is initialized (use __typeof__ instead)", decl
);
3978 return error_mark_node
;
3981 error ("function %q#D is initialized like a variable", decl
);
3982 return error_mark_node
;
3990 if (! toplevel_bindings_p ()
3991 && DECL_EXTERNAL (decl
))
3992 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3994 DECL_EXTERNAL (decl
) = 0;
3995 if (toplevel_bindings_p ())
3996 TREE_STATIC (decl
) = 1;
3999 /* Set attributes here so if duplicate decl, will have proper attributes. */
4000 cplus_decl_attributes (&decl
, attributes
, 0);
4002 /* Dllimported symbols cannot be defined. Static data members (which
4003 can be initialized in-class and dllimported) go through grokfield,
4004 not here, so we don't need to exclude those decls when checking for
4006 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4008 error ("definition of %q#D is marked %<dllimport%>", decl
);
4009 DECL_DLLIMPORT_P (decl
) = 0;
4012 /* If #pragma weak was used, mark the decl weak now. */
4013 maybe_apply_pragma_weak (decl
);
4015 if (TREE_CODE (decl
) == FUNCTION_DECL
4016 && DECL_DECLARED_INLINE_P (decl
)
4017 && DECL_UNINLINABLE (decl
)
4018 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4019 warning (0, "inline function %q+D given attribute noinline", decl
);
4021 if (context
&& COMPLETE_TYPE_P (complete_type (context
)))
4023 if (TREE_CODE (decl
) == VAR_DECL
)
4025 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4026 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4027 error ("%q#D is not a static member of %q#T", decl
, context
);
4030 if (DECL_CONTEXT (field
) != context
)
4032 if (!same_type_p (DECL_CONTEXT (field
), context
))
4033 pedwarn ("ISO C++ does not permit %<%T::%D%> "
4034 "to be defined as %<%T::%D%>",
4035 DECL_CONTEXT (field
), DECL_NAME (decl
),
4036 context
, DECL_NAME (decl
));
4037 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4039 if (processing_specialization
4040 && template_class_depth (context
) == 0
4041 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
4042 error ("template header not allowed in member definition "
4043 "of explicitly specialized class");
4044 /* Static data member are tricky; an in-class initialization
4045 still doesn't provide a definition, so the in-class
4046 declaration will have DECL_EXTERNAL set, but will have an
4047 initialization. Thus, duplicate_decls won't warn
4048 about this situation, and so we check here. */
4049 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4050 error ("duplicate initialization of %qD", decl
);
4051 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4057 tree field
= check_classfn (context
, decl
,
4058 (processing_template_decl
4059 > template_class_depth (context
))
4060 ? current_template_parms
4062 if (field
&& field
!= error_mark_node
4063 && duplicate_decls (decl
, field
,
4064 /*newdecl_is_friend=*/false))
4068 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4069 DECL_IN_AGGR_P (decl
) = 0;
4070 /* Do not mark DECL as an explicit specialization if it was not
4071 already marked as an instantiation; a declaration should
4072 never be marked as a specialization unless we know what
4073 template is being specialized. */
4074 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4076 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4078 /* [temp.expl.spec] An explicit specialization of a static data
4079 member of a template is a definition if the declaration
4080 includes an initializer; otherwise, it is a declaration.
4082 We check for processing_specialization so this only applies
4083 to the new specialization syntax. */
4084 if (!initialized
&& processing_specialization
)
4085 DECL_EXTERNAL (decl
) = 1;
4088 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
))
4089 pedwarn ("declaration of %q#D outside of class is not definition",
4093 was_public
= TREE_PUBLIC (decl
);
4095 /* Enter this declaration into the symbol table. */
4096 tem
= maybe_push_decl (decl
);
4098 if (processing_template_decl
)
4099 tem
= push_template_decl (tem
);
4100 if (tem
== error_mark_node
)
4101 return error_mark_node
;
4103 /* Tell the back end to use or not use .common as appropriate. If we say
4104 -fconserve-space, we want this to save .data space, at the expense of
4105 wrong semantics. If we say -fno-conserve-space, we want this to
4106 produce errors about redefs; to do this we force variables into the
4108 if (flag_conserve_space
4109 && TREE_CODE (tem
) == VAR_DECL
4110 && TREE_PUBLIC (tem
)
4111 && !DECL_THREAD_LOCAL_P (tem
)
4112 && !have_global_bss_p ())
4113 DECL_COMMON (tem
) = 1;
4115 if (TREE_CODE (tem
) == VAR_DECL
4116 && DECL_NAMESPACE_SCOPE_P (tem
) && !TREE_PUBLIC (tem
) && !was_public
4117 && !DECL_THIS_STATIC (tem
) && !DECL_ARTIFICIAL (tem
))
4119 /* This is a const variable with implicit 'static'. Set
4120 DECL_THIS_STATIC so we can tell it from variables that are
4121 !TREE_PUBLIC because of the anonymous namespace. */
4122 gcc_assert (cp_type_readonly (TREE_TYPE (tem
)));
4123 DECL_THIS_STATIC (tem
) = 1;
4126 if (!processing_template_decl
&& TREE_CODE (tem
) == VAR_DECL
)
4127 start_decl_1 (tem
, initialized
);
4133 start_decl_1 (tree decl
, bool initialized
)
4137 gcc_assert (!processing_template_decl
);
4139 if (error_operand_p (decl
))
4142 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4143 type
= TREE_TYPE (decl
);
4146 /* Is it valid for this decl to have an initializer at all?
4147 If not, set INITIALIZED to zero, which will indirectly
4148 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4150 /* Don't allow initializations for incomplete types except for
4151 arrays which might be completed by the initialization. */
4152 if (COMPLETE_TYPE_P (complete_type (type
)))
4153 ; /* A complete type is ok. */
4154 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4156 error ("variable %q#D has initializer but incomplete type", decl
);
4158 type
= TREE_TYPE (decl
) = error_mark_node
;
4160 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4162 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4163 error ("elements of array %q#D have incomplete type", decl
);
4164 /* else we already gave an error in start_decl. */
4168 else if (IS_AGGR_TYPE (type
)
4169 && ! DECL_EXTERNAL (decl
))
4171 if (!COMPLETE_TYPE_P (complete_type (type
)))
4173 error ("aggregate %q#D has incomplete type and cannot be defined",
4175 /* Change the type so that assemble_variable will give
4176 DECL an rtl we can live with: (mem (const_int 0)). */
4177 type
= TREE_TYPE (decl
) = error_mark_node
;
4181 /* If any base type in the hierarchy of TYPE needs a constructor,
4182 then we set initialized to 1. This way any nodes which are
4183 created for the purposes of initializing this aggregate
4184 will live as long as it does. This is necessary for global
4185 aggregates which do not have their initializers processed until
4186 the end of the file. */
4187 initialized
= TYPE_NEEDS_CONSTRUCTING (type
);
4191 /* Create a new scope to hold this declaration if necessary.
4192 Whether or not a new scope is necessary cannot be determined
4193 until after the type has been completed; if the type is a
4194 specialization of a class template it is not until after
4195 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4196 will be set correctly. */
4197 maybe_push_cleanup_level (type
);
4200 /* Handle initialization of references. DECL, TYPE, and INIT have the
4201 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4202 but will be set to a new CLEANUP_STMT if a temporary is created
4203 that must be destroyed subsequently.
4205 Returns an initializer expression to use to initialize DECL, or
4206 NULL if the initialization can be performed statically.
4208 Quotes on semantics can be found in ARM 8.4.3. */
4211 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
4215 if (init
== NULL_TREE
)
4217 if ((DECL_LANG_SPECIFIC (decl
) == 0
4218 || DECL_IN_AGGR_P (decl
) == 0)
4219 && ! DECL_THIS_EXTERN (decl
))
4220 error ("%qD declared as reference but not initialized", decl
);
4224 if (TREE_CODE (init
) == CONSTRUCTOR
)
4226 error ("ISO C++ forbids use of initializer list to "
4227 "initialize reference %qD", decl
);
4231 if (TREE_CODE (init
) == TREE_LIST
)
4232 init
= build_x_compound_expr_from_list (init
, "initializer");
4234 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4235 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4236 /* Note: default conversion is only called in very special cases. */
4237 init
= decay_conversion (init
);
4239 /* Convert INIT to the reference type TYPE. This may involve the
4240 creation of a temporary, whose lifetime must be the same as that
4241 of the reference. If so, a DECL_EXPR for the temporary will be
4242 added just after the DECL_EXPR for DECL. That's why we don't set
4243 DECL_INITIAL for local references (instead assigning to them
4244 explicitly); we need to allow the temporary to be initialized
4246 tmp
= initialize_reference (type
, init
, decl
, cleanup
);
4248 if (tmp
== error_mark_node
)
4250 else if (tmp
== NULL_TREE
)
4252 error ("cannot initialize %qT from %qT", type
, TREE_TYPE (init
));
4256 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
4259 DECL_INITIAL (decl
) = tmp
;
4264 /* Designated initializers in arrays are not supported in GNU C++.
4265 The parser cannot detect this error since it does not know whether
4266 a given brace-enclosed initializer is for a class type or for an
4267 array. This function checks that CE does not use a designated
4268 initializer. If it does, an error is issued. Returns true if CE
4269 is valid, i.e., does not have a designated initializer. */
4272 check_array_designated_initializer (const constructor_elt
*ce
)
4274 /* Designated initializers for array elements are not supported. */
4277 /* The parser only allows identifiers as designated
4279 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4280 error ("name %qD used in a GNU-style designated "
4281 "initializer for an array", ce
->index
);
4288 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4289 array until we finish parsing the initializer. If that's the
4290 situation we're in, update DECL accordingly. */
4293 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4295 tree type
= TREE_TYPE (decl
);
4297 if (TREE_CODE (type
) == ARRAY_TYPE
4298 && TYPE_DOMAIN (type
) == NULL_TREE
4299 && TREE_CODE (decl
) != TYPE_DECL
)
4301 /* do_default is really a C-ism to deal with tentative definitions.
4302 But let's leave it here to ease the eventual merge. */
4303 int do_default
= !DECL_EXTERNAL (decl
);
4304 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4307 /* Check that there are no designated initializers in INIT, as
4308 those are not supported in GNU C++, and as the middle-end
4309 will crash if presented with a non-numeric designated
4311 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4313 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4314 constructor_elt
*ce
;
4317 VEC_iterate (constructor_elt
, v
, i
, ce
);
4319 if (!check_array_designated_initializer (ce
))
4325 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4329 error ("initializer fails to determine size of %qD", decl
);
4330 TREE_TYPE (decl
) = error_mark_node
;
4332 else if (failure
== 2)
4336 error ("array size missing in %qD", decl
);
4337 TREE_TYPE (decl
) = error_mark_node
;
4339 /* If a `static' var's size isn't known, make it extern as
4340 well as static, so it does not get allocated. If it's not
4341 `static', then don't mark it extern; finish_incomplete_decl
4342 will give it a default size and it will get allocated. */
4343 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4344 DECL_EXTERNAL (decl
) = 1;
4346 else if (failure
== 3)
4348 error ("zero-size array %qD", decl
);
4349 TREE_TYPE (decl
) = error_mark_node
;
4353 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4355 layout_decl (decl
, 0);
4359 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4360 any appropriate error messages regarding the layout. */
4363 layout_var_decl (tree decl
)
4367 type
= TREE_TYPE (decl
);
4368 if (type
== error_mark_node
)
4371 /* If we haven't already layed out this declaration, do so now.
4372 Note that we must not call complete type for an external object
4373 because it's type might involve templates that we are not
4374 supposed to instantiate yet. (And it's perfectly valid to say
4375 `extern X x' for some incomplete type `X'.) */
4376 if (!DECL_EXTERNAL (decl
))
4377 complete_type (type
);
4378 if (!DECL_SIZE (decl
)
4379 && TREE_TYPE (decl
) != error_mark_node
4380 && (COMPLETE_TYPE_P (type
)
4381 || (TREE_CODE (type
) == ARRAY_TYPE
4382 && !TYPE_DOMAIN (type
)
4383 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4384 layout_decl (decl
, 0);
4386 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4388 /* An automatic variable with an incomplete type: that is an error.
4389 Don't talk about array types here, since we took care of that
4390 message in grokdeclarator. */
4391 error ("storage size of %qD isn't known", decl
);
4392 TREE_TYPE (decl
) = error_mark_node
;
4395 /* Keep this code around in case we later want to control debug info
4396 based on whether a type is "used". (jason 1999-11-11) */
4398 else if (!DECL_EXTERNAL (decl
) && IS_AGGR_TYPE (ttype
))
4399 /* Let debugger know it should output info for this type. */
4400 note_debug_info_needed (ttype
);
4402 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4403 note_debug_info_needed (DECL_CONTEXT (decl
));
4406 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4407 && DECL_SIZE (decl
) != NULL_TREE
4408 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4410 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4411 constant_expression_warning (DECL_SIZE (decl
));
4413 error ("storage size of %qD isn't constant", decl
);
4417 /* If a local static variable is declared in an inline function, or if
4418 we have a weak definition, we must endeavor to create only one
4419 instance of the variable at link-time. */
4422 maybe_commonize_var (tree decl
)
4424 /* Static data in a function with comdat linkage also has comdat
4426 if (TREE_STATIC (decl
)
4427 /* Don't mess with __FUNCTION__. */
4428 && ! DECL_ARTIFICIAL (decl
)
4429 && DECL_FUNCTION_SCOPE_P (decl
)
4430 /* Unfortunately, import_export_decl has not always been called
4431 before the function is processed, so we cannot simply check
4433 && (DECL_COMDAT (DECL_CONTEXT (decl
))
4434 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl
))
4435 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl
)))
4436 && TREE_PUBLIC (DECL_CONTEXT (decl
)))))
4440 /* With weak symbols, we simply make the variable COMDAT;
4441 that will cause copies in multiple translations units to
4443 comdat_linkage (decl
);
4447 if (DECL_INITIAL (decl
) == NULL_TREE
4448 || DECL_INITIAL (decl
) == error_mark_node
)
4450 /* Without weak symbols, we can use COMMON to merge
4451 uninitialized variables. */
4452 TREE_PUBLIC (decl
) = 1;
4453 DECL_COMMON (decl
) = 1;
4457 /* While for initialized variables, we must use internal
4458 linkage -- which means that multiple copies will not
4460 TREE_PUBLIC (decl
) = 0;
4461 DECL_COMMON (decl
) = 0;
4462 warning (0, "sorry: semantics of inline function static "
4463 "data %q+#D are wrong (you'll wind up "
4464 "with multiple copies)", decl
);
4465 warning (0, "%J you can work around this by removing "
4471 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4472 /* Set it up again; we might have set DECL_INITIAL since the last
4474 comdat_linkage (decl
);
4477 /* Issue an error message if DECL is an uninitialized const variable. */
4480 check_for_uninitialized_const_var (tree decl
)
4482 tree type
= TREE_TYPE (decl
);
4484 /* ``Unless explicitly declared extern, a const object does not have
4485 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4487 if (TREE_CODE (decl
) == VAR_DECL
4488 && TREE_CODE (type
) != REFERENCE_TYPE
4489 && CP_TYPE_CONST_P (type
)
4490 && !TYPE_NEEDS_CONSTRUCTING (type
)
4491 && !DECL_INITIAL (decl
))
4492 error ("uninitialized const %qD", decl
);
4496 /* Structure holding the current initializer being processed by reshape_init.
4497 CUR is a pointer to the current element being processed, END is a pointer
4498 after the last element present in the initializer. */
4499 typedef struct reshape_iterator_t
4501 constructor_elt
*cur
;
4502 constructor_elt
*end
;
4505 static tree
reshape_init_r (tree
, reshape_iter
*, bool);
4507 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4508 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4509 initialized. If there are no more such fields, the return value
4513 next_initializable_field (tree field
)
4516 && (TREE_CODE (field
) != FIELD_DECL
4517 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4518 || DECL_ARTIFICIAL (field
)))
4519 field
= TREE_CHAIN (field
);
4524 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4525 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4526 INTEGER_CST representing the size of the array minus one (the maximum index),
4527 or NULL_TREE if the array was declared without specifying the size. D is
4528 the iterator within the constructor. */
4531 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
)
4534 bool sized_array_p
= (max_index
!= NULL_TREE
);
4535 unsigned HOST_WIDE_INT max_index_cst
= 0;
4536 unsigned HOST_WIDE_INT index
;
4538 /* The initializer for an array is always a CONSTRUCTOR. */
4539 new_init
= build_constructor (NULL_TREE
, NULL
);
4543 /* Minus 1 is used for zero sized arrays. */
4544 if (integer_all_onesp (max_index
))
4547 if (host_integerp (max_index
, 1))
4548 max_index_cst
= tree_low_cst (max_index
, 1);
4549 /* sizetype is sign extended, not zero extended. */
4551 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
4555 /* Loop until there are no more initializers. */
4557 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
4562 check_array_designated_initializer (d
->cur
);
4563 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false);
4564 if (elt_init
== error_mark_node
)
4565 return error_mark_node
;
4566 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), NULL_TREE
, elt_init
);
4572 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4573 Parameters are the same of reshape_init_r. */
4576 reshape_init_array (tree type
, reshape_iter
*d
)
4578 tree max_index
= NULL_TREE
;
4580 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
4582 if (TYPE_DOMAIN (type
))
4583 max_index
= array_type_nelts (type
);
4585 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
);
4588 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4589 Parameters are the same of reshape_init_r. */
4592 reshape_init_vector (tree type
, reshape_iter
*d
)
4594 tree max_index
= NULL_TREE
;
4597 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
4599 if (COMPOUND_LITERAL_P (d
->cur
->value
))
4601 tree value
= d
->cur
->value
;
4602 if (!same_type_p (TREE_TYPE (value
), type
))
4604 error ("invalid type %qT as initializer for a vector of type %qT",
4605 TREE_TYPE (d
->cur
->value
), type
);
4606 value
= error_mark_node
;
4612 /* For a vector, the representation type is a struct
4613 containing a single member which is an array of the
4614 appropriate size. */
4615 rtype
= TYPE_DEBUG_REPRESENTATION_TYPE (type
);
4616 if (rtype
&& TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype
))))
4617 max_index
= array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype
)));
4619 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
);
4622 /* Subroutine of reshape_init_r, processes the initializers for classes
4623 or union. Parameters are the same of reshape_init_r. */
4626 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
)
4631 gcc_assert (CLASS_TYPE_P (type
));
4633 /* The initializer for a class is always a CONSTRUCTOR. */
4634 new_init
= build_constructor (NULL_TREE
, NULL
);
4635 field
= next_initializable_field (TYPE_FIELDS (type
));
4641 An initializer for an aggregate member that is an
4642 empty class shall have the form of an empty
4643 initializer-list {}. */
4644 if (!first_initializer_p
)
4646 error ("initializer for %qT must be brace-enclosed", type
);
4647 return error_mark_node
;
4652 /* Loop through the initializable fields, gathering initializers. */
4653 while (d
->cur
!= d
->end
)
4657 /* Handle designated initializers, as an extension. */
4660 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
4662 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
4664 error ("%qT has no non-static data member named %qD", type
,
4666 return error_mark_node
;
4670 /* If we processed all the member of the class, we are done. */
4674 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
4675 /*first_initializer_p=*/false);
4676 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
4680 When a union is initialized with a brace-enclosed
4681 initializer, the braces shall only contain an
4682 initializer for the first member of the union. */
4683 if (TREE_CODE (type
) == UNION_TYPE
)
4686 field
= next_initializable_field (TREE_CHAIN (field
));
4692 /* Subroutine of reshape_init, which processes a single initializer (part of
4693 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4694 iterator within the CONSTRUCTOR which points to the initializer to process.
4695 FIRST_INITIALIZER_P is true if this is the first initializer of the
4696 CONSTRUCTOR node. */
4699 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
)
4701 tree init
= d
->cur
->value
;
4703 /* A non-aggregate type is always initialized with a single
4705 if (!CP_AGGREGATE_TYPE_P (type
))
4707 /* It is invalid to initialize a non-aggregate type with a
4708 brace-enclosed initializer.
4709 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4710 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4711 a CONSTRUCTOR (with a record type). */
4712 if (TREE_CODE (init
) == CONSTRUCTOR
4713 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
4715 error ("braces around scalar initializer for type %qT", type
);
4716 init
= error_mark_node
;
4725 All implicit type conversions (clause _conv_) are considered when
4726 initializing the aggregate member with an initializer from an
4727 initializer-list. If the initializer can initialize a member,
4728 the member is initialized. Otherwise, if the member is itself a
4729 non-empty subaggregate, brace elision is assumed and the
4730 initializer is considered for the initialization of the first
4731 member of the subaggregate. */
4732 if (TREE_CODE (init
) != CONSTRUCTOR
4733 && can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
))
4739 /* [dcl.init.string]
4741 A char array (whether plain char, signed char, or unsigned char)
4742 can be initialized by a string-literal (optionally enclosed in
4743 braces); a wchar_t array can be initialized by a wide
4744 string-literal (optionally enclosed in braces). */
4745 if (TREE_CODE (type
) == ARRAY_TYPE
4746 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
4748 tree str_init
= init
;
4750 /* Strip one level of braces if and only if they enclose a single
4751 element (as allowed by [dcl.init.string]). */
4752 if (!first_initializer_p
4753 && TREE_CODE (str_init
) == CONSTRUCTOR
4754 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
4756 str_init
= VEC_index (constructor_elt
,
4757 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
4760 /* If it's a string literal, then it's the initializer for the array
4761 as a whole. Otherwise, continue with normal initialization for
4762 array types (one value per array element). */
4763 if (TREE_CODE (str_init
) == STRING_CST
)
4770 /* The following cases are about aggregates. If we are not within a full
4771 initializer already, and there is not a CONSTRUCTOR, it means that there
4772 is a missing set of braces (that is, we are processing the case for
4773 which reshape_init exists). */
4774 if (!first_initializer_p
)
4776 if (TREE_CODE (init
) == CONSTRUCTOR
)
4778 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
4779 /* There is no need to reshape pointer-to-member function
4780 initializers, as they are always constructed correctly
4781 by the front end. */
4783 else if (COMPOUND_LITERAL_P (init
))
4784 /* For a nested compound literal, there is no need to reshape since
4785 brace elision is not allowed. Even if we decided to allow it,
4786 we should add a call to reshape_init in finish_compound_literal,
4787 before calling digest_init, so changing this code would still
4788 not be necessary. */
4789 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
4793 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
4794 return reshape_init (type
, init
);
4798 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
4802 /* Dispatch to specialized routines. */
4803 if (CLASS_TYPE_P (type
))
4804 return reshape_init_class (type
, d
, first_initializer_p
);
4805 else if (TREE_CODE (type
) == ARRAY_TYPE
)
4806 return reshape_init_array (type
, d
);
4807 else if (TREE_CODE (type
) == VECTOR_TYPE
)
4808 return reshape_init_vector (type
, d
);
4813 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4814 brace-enclosed aggregate initializer.
4816 INIT is the CONSTRUCTOR containing the list of initializers describing
4817 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4818 It may not presently match the shape of the TYPE; for example:
4820 struct S { int a; int b; };
4821 struct S a[] = { 1, 2, 3, 4 };
4823 Here INIT will hold a VEC of four elements, rather than a
4824 VEC of two elements, each itself a VEC of two elements. This
4825 routine transforms INIT from the former form into the latter. The
4826 revised CONSTRUCTOR node is returned. */
4829 reshape_init (tree type
, tree init
)
4831 VEC(constructor_elt
, gc
) *v
;
4835 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
4837 v
= CONSTRUCTOR_ELTS (init
);
4839 /* An empty constructor does not need reshaping, and it is always a valid
4841 if (VEC_empty (constructor_elt
, v
))
4844 /* Recurse on this CONSTRUCTOR. */
4845 d
.cur
= VEC_index (constructor_elt
, v
, 0);
4846 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
4848 new_init
= reshape_init_r (type
, &d
, true);
4849 if (new_init
== error_mark_node
)
4850 return error_mark_node
;
4852 /* Make sure all the element of the constructor were used. Otherwise,
4853 issue an error about exceeding initializers. */
4855 error ("too many initializers for %qT", type
);
4860 /* Verify INIT (the initializer for DECL), and record the
4861 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4862 grok_reference_init.
4864 If the return value is non-NULL, it is an expression that must be
4865 evaluated dynamically to initialize DECL. */
4868 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
4870 tree type
= TREE_TYPE (decl
);
4871 tree init_code
= NULL
;
4873 /* Things that are going to be initialized need to have complete
4875 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
4877 if (type
== error_mark_node
)
4878 /* We will have already complained. */
4881 if (TREE_CODE (type
) == ARRAY_TYPE
)
4883 tree element_type
= TREE_TYPE (type
);
4885 /* The array type itself need not be complete, because the
4886 initializer may tell us how many elements are in the array.
4887 But, the elements of the array must be complete. */
4888 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
4890 error ("elements of array %q#D have incomplete type", decl
);
4893 /* It is not valid to initialize a VLA. */
4895 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
4896 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
4898 error ("variable-sized object %qD may not be initialized", decl
);
4902 else if (!COMPLETE_TYPE_P (type
))
4904 error ("%qD has incomplete type", decl
);
4905 TREE_TYPE (decl
) = error_mark_node
;
4909 /* There is no way to make a variable-sized class type in GNU C++. */
4910 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
4912 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
4914 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
4915 if (SCALAR_TYPE_P (type
))
4919 error ("scalar object %qD requires one element in initializer",
4921 TREE_TYPE (decl
) = error_mark_node
;
4925 else if ((cxx_dialect
== cxx98
) && !CP_AGGREGATE_TYPE_P (type
))
4927 /* A non-aggregate that is not a scalar cannot be initialized
4928 via an initializer-list in C++98. */
4929 error ("braces around initializer for non-aggregate type %qT",
4931 TREE_TYPE (decl
) = error_mark_node
;
4936 if (TREE_CODE (decl
) == CONST_DECL
)
4938 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
4940 DECL_INITIAL (decl
) = init
;
4942 gcc_assert (init
!= NULL_TREE
);
4945 else if (!DECL_EXTERNAL (decl
) && TREE_CODE (type
) == REFERENCE_TYPE
)
4946 init
= grok_reference_init (decl
, type
, init
, cleanup
);
4949 /* Do not reshape constructors of vectors (they don't need to be
4951 if (TREE_CODE (init
) == CONSTRUCTOR
4952 && !COMPOUND_LITERAL_P (init
)
4953 && !TREE_TYPE (init
)) /* ptrmemfunc */
4955 init
= reshape_init (type
, init
);
4957 if ((*targetm
.vector_opaque_p
) (type
))
4959 error ("opaque vector types cannot be initialized");
4960 init
= error_mark_node
;
4964 /* If DECL has an array type without a specific bound, deduce the
4965 array size from the initializer. */
4966 maybe_deduce_size_from_array_init (decl
, init
);
4967 type
= TREE_TYPE (decl
);
4968 if (type
== error_mark_node
)
4971 if (TYPE_HAS_CONSTRUCTOR (type
) || TYPE_NEEDS_CONSTRUCTING (type
))
4973 if (TREE_CODE (type
) == ARRAY_TYPE
)
4974 goto initialize_aggr
;
4975 else if (TREE_CODE (init
) == CONSTRUCTOR
)
4977 if (TYPE_NON_AGGREGATE_CLASS (type
))
4979 error ("%qD must be initialized by constructor, "
4982 init
= error_mark_node
;
4985 goto dont_use_constructor
;
4989 int saved_stmts_are_full_exprs_p
;
4992 saved_stmts_are_full_exprs_p
= 0;
4993 if (building_stmt_tree ())
4995 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4996 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4998 init
= build_aggr_init (decl
, init
, flags
);
4999 if (building_stmt_tree ())
5000 current_stmt_tree ()->stmts_are_full_exprs_p
=
5001 saved_stmts_are_full_exprs_p
;
5007 dont_use_constructor
:
5008 if (TREE_CODE (init
) != TREE_VEC
)
5010 init_code
= store_init_value (decl
, init
);
5011 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5012 && DECL_INITIAL (decl
)
5013 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5014 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5015 warning (0, "array %qD initialized by parenthesized string literal %qE",
5016 decl
, DECL_INITIAL (decl
));
5021 else if (DECL_EXTERNAL (decl
))
5023 else if (TYPE_P (type
) && TYPE_NEEDS_CONSTRUCTING (type
))
5024 goto initialize_aggr
;
5025 else if (IS_AGGR_TYPE (type
))
5027 tree core_type
= strip_array_types (type
);
5029 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
))
5030 error ("structure %qD with uninitialized const members", decl
);
5031 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
))
5032 error ("structure %qD with uninitialized reference members", decl
);
5034 check_for_uninitialized_const_var (decl
);
5037 check_for_uninitialized_const_var (decl
);
5039 if (init
&& init
!= error_mark_node
)
5040 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5045 /* If DECL is not a local variable, give it RTL. */
5048 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5050 int toplev
= toplevel_bindings_p ();
5052 const char *filename
;
5054 /* Set the DECL_ASSEMBLER_NAME for the object. */
5057 /* The `register' keyword, when used together with an
5058 asm-specification, indicates that the variable should be
5059 placed in a particular register. */
5060 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5062 set_user_assembler_name (decl
, asmspec
);
5063 DECL_HARD_REGISTER (decl
) = 1;
5067 if (TREE_CODE (decl
) == FUNCTION_DECL
5068 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5069 set_builtin_user_assembler_name (decl
, asmspec
);
5070 set_user_assembler_name (decl
, asmspec
);
5074 /* Handle non-variables up front. */
5075 if (TREE_CODE (decl
) != VAR_DECL
)
5077 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5081 /* If we see a class member here, it should be a static data
5083 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5085 gcc_assert (TREE_STATIC (decl
));
5086 /* An in-class declaration of a static data member should be
5087 external; it is only a declaration, and not a definition. */
5088 if (init
== NULL_TREE
)
5089 gcc_assert (DECL_EXTERNAL (decl
));
5092 /* We don't create any RTL for local variables. */
5093 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5096 /* We defer emission of local statics until the corresponding
5097 DECL_EXPR is expanded. */
5098 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5100 /* We try to defer namespace-scope static constants so that they are
5101 not emitted into the object file unnecessarily. */
5102 filename
= input_filename
;
5103 if (!DECL_VIRTUAL_P (decl
)
5104 && TREE_READONLY (decl
)
5105 && DECL_INITIAL (decl
) != NULL_TREE
5106 && DECL_INITIAL (decl
) != error_mark_node
5108 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5110 && !TREE_PUBLIC (decl
))
5112 /* Fool with the linkage of static consts according to #pragma
5114 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5115 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5117 TREE_PUBLIC (decl
) = 1;
5118 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5123 /* Likewise for template instantiations. */
5124 else if (DECL_LANG_SPECIFIC (decl
)
5125 && DECL_IMPLICIT_INSTANTIATION (decl
))
5128 /* If we're not deferring, go ahead and assemble the variable. */
5130 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5133 /* Generate code to initialize DECL (a local variable). */
5136 initialize_local_var (tree decl
, tree init
)
5138 tree type
= TREE_TYPE (decl
);
5141 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5142 || TREE_CODE (decl
) == RESULT_DECL
);
5143 gcc_assert (!TREE_STATIC (decl
));
5145 if (DECL_SIZE (decl
) == NULL_TREE
)
5147 /* If we used it already as memory, it must stay in memory. */
5148 DECL_INITIAL (decl
) = NULL_TREE
;
5149 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5152 if (DECL_SIZE (decl
) && type
!= error_mark_node
)
5156 /* Compute and store the initial value. */
5157 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5159 /* Perform the initialization. */
5162 int saved_stmts_are_full_exprs_p
;
5164 gcc_assert (building_stmt_tree ());
5165 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5166 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5167 finish_expr_stmt (init
);
5168 current_stmt_tree ()->stmts_are_full_exprs_p
=
5169 saved_stmts_are_full_exprs_p
;
5172 /* Set this to 0 so we can tell whether an aggregate which was
5173 initialized was ever used. Don't do this if it has a
5174 destructor, so we don't complain about the 'resource
5175 allocation is initialization' idiom. Now set
5176 attribute((unused)) on types so decls of that type will be
5177 marked used. (see TREE_USED, above.) */
5178 if (TYPE_NEEDS_CONSTRUCTING (type
)
5180 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5181 && DECL_NAME (decl
))
5182 TREE_USED (decl
) = 0;
5183 else if (already_used
)
5184 TREE_USED (decl
) = 1;
5187 /* Generate a cleanup, if necessary. */
5188 cleanup
= cxx_maybe_build_cleanup (decl
);
5189 if (DECL_SIZE (decl
) && cleanup
)
5190 finish_decl_cleanup (decl
, cleanup
);
5193 /* DECL is a VAR_DECL for a compiler-generated variable with static
5194 storage duration (like a virtual table) whose initializer is a
5195 compile-time constant. INIT must be either a TREE_LIST of values,
5196 or a CONSTRUCTOR. Initialize the variable and provide it to the
5200 initialize_artificial_var (tree decl
, tree init
)
5202 gcc_assert (DECL_ARTIFICIAL (decl
));
5203 if (TREE_CODE (init
) == TREE_LIST
)
5204 init
= build_constructor_from_list (NULL_TREE
, init
);
5205 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5206 DECL_INITIAL (decl
) = init
;
5207 DECL_INITIALIZED_P (decl
) = 1;
5208 determine_visibility (decl
);
5209 layout_var_decl (decl
);
5210 maybe_commonize_var (decl
);
5211 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5214 /* INIT is the initializer for a variable, as represented by the
5215 parser. Returns true iff INIT is value-dependent. */
5218 value_dependent_init_p (tree init
)
5220 if (TREE_CODE (init
) == TREE_LIST
)
5221 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5222 return any_value_dependent_elements_p (init
);
5223 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5224 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5226 VEC(constructor_elt
, gc
) *elts
;
5230 elts
= CONSTRUCTOR_ELTS (init
);
5231 nelts
= VEC_length (constructor_elt
, elts
);
5232 for (i
= 0; i
< nelts
; ++i
)
5233 if (value_dependent_init_p (VEC_index (constructor_elt
,
5238 /* It must be a simple expression, e.g., int i = 3; */
5239 return value_dependent_expression_p (init
);
5244 /* Finish processing of a declaration;
5245 install its line number and initial value.
5246 If the length of an array type is not known before,
5247 it must be determined now, from the initial value, or it is an error.
5249 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5250 true, then INIT is an integral constant expression.
5252 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5253 if the (init) syntax was used. */
5256 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5257 tree asmspec_tree
, int flags
)
5261 const char *asmspec
= NULL
;
5262 int was_readonly
= 0;
5263 bool var_definition_p
= false;
5264 int saved_processing_template_decl
;
5266 if (decl
== error_mark_node
)
5271 error ("assignment (not initialization) in declaration");
5275 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5276 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5277 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
5279 type
= TREE_TYPE (decl
);
5280 if (type
== error_mark_node
)
5283 /* Assume no cleanup is required. */
5284 cleanup
= NULL_TREE
;
5285 saved_processing_template_decl
= processing_template_decl
;
5287 /* If a name was specified, get the string. */
5288 if (global_scope_p (current_binding_level
))
5289 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
5290 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
5291 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
5293 if (current_class_type
5294 && CP_DECL_CONTEXT (decl
) == current_class_type
5295 && TYPE_BEING_DEFINED (current_class_type
)
5296 && (DECL_INITIAL (decl
) || init
))
5297 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
5299 if (processing_template_decl
)
5301 bool type_dependent_p
;
5303 /* Add this declaration to the statement-tree. */
5304 if (at_function_scope_p ())
5305 add_decl_expr (decl
);
5307 type_dependent_p
= dependent_type_p (type
);
5309 if (init
&& init_const_expr_p
)
5311 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
5312 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl
))
5313 TREE_CONSTANT (decl
) = 1;
5316 /* Generally, initializers in templates are expanded when the
5317 template is instantiated. But, if DECL is an integral
5318 constant static data member, then it can be used in future
5319 integral constant expressions, and its value must be
5322 && DECL_CLASS_SCOPE_P (decl
)
5323 && DECL_INTEGRAL_CONSTANT_VAR_P (decl
)
5324 && !type_dependent_p
5325 && !value_dependent_init_p (init
)))
5328 DECL_INITIAL (decl
) = init
;
5329 if (TREE_CODE (decl
) == VAR_DECL
5330 && !DECL_PRETTY_FUNCTION_P (decl
)
5331 && !type_dependent_p
)
5332 maybe_deduce_size_from_array_init (decl
, init
);
5336 init
= fold_non_dependent_expr (init
);
5337 processing_template_decl
= 0;
5340 /* Take care of TYPE_DECLs up front. */
5341 if (TREE_CODE (decl
) == TYPE_DECL
)
5343 if (type
!= error_mark_node
5344 && IS_AGGR_TYPE (type
) && DECL_NAME (decl
))
5346 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
5347 warning (0, "shadowing previous type declaration of %q#D", decl
);
5348 set_identifier_type_value (DECL_NAME (decl
), decl
);
5351 /* If we have installed this as the canonical typedef for this
5352 type, and that type has not been defined yet, delay emitting
5353 the debug information for it, as we will emit it later. */
5354 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
5355 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
5356 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
5358 rest_of_decl_compilation (decl
, DECL_CONTEXT (decl
) == NULL_TREE
,
5363 /* A reference will be modified here, as it is initialized. */
5364 if (! DECL_EXTERNAL (decl
)
5365 && TREE_READONLY (decl
)
5366 && TREE_CODE (type
) == REFERENCE_TYPE
)
5369 TREE_READONLY (decl
) = 0;
5372 if (TREE_CODE (decl
) == VAR_DECL
)
5374 /* Only PODs can have thread-local storage. Other types may require
5375 various kinds of non-trivial initialization. */
5376 if (DECL_THREAD_LOCAL_P (decl
) && !pod_type_p (TREE_TYPE (decl
)))
5377 error ("%qD cannot be thread-local because it has non-POD type %qT",
5378 decl
, TREE_TYPE (decl
));
5379 /* If this is a local variable that will need a mangled name,
5380 register it now. We must do this before processing the
5381 initializer for the variable, since the initialization might
5382 require a guard variable, and since the mangled name of the
5383 guard variable will depend on the mangled name of this
5385 if (!processing_template_decl
5386 && DECL_FUNCTION_SCOPE_P (decl
)
5387 && TREE_STATIC (decl
)
5388 && !DECL_ARTIFICIAL (decl
))
5389 push_local_name (decl
);
5390 /* Convert the initializer to the type of DECL, if we have not
5391 already initialized DECL. */
5392 if (!DECL_INITIALIZED_P (decl
)
5393 /* If !DECL_EXTERNAL then DECL is being defined. In the
5394 case of a static data member initialized inside the
5395 class-specifier, there can be an initializer even if DECL
5396 is *not* defined. */
5397 && (!DECL_EXTERNAL (decl
) || init
))
5401 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
5402 if (init_const_expr_p
)
5404 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
5405 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl
))
5406 TREE_CONSTANT (decl
) = 1;
5409 init
= check_initializer (decl
, init
, flags
, &cleanup
);
5410 /* Thread-local storage cannot be dynamically initialized. */
5411 if (DECL_THREAD_LOCAL_P (decl
) && init
)
5413 error ("%qD is thread-local and so cannot be dynamically "
5414 "initialized", decl
);
5418 /* Check that the initializer for a static data member was a
5419 constant. Although we check in the parser that the
5420 initializer is an integral constant expression, we do not
5421 simplify division-by-zero at the point at which it
5422 occurs. Therefore, in:
5424 struct S { static const int i = 7 / 0; };
5426 we issue an error at this point. It would
5427 probably be better to forbid division by zero in
5428 integral constant expressions. */
5429 if (DECL_EXTERNAL (decl
) && init
)
5431 error ("%qD cannot be initialized by a non-constant expression"
5432 " when being declared", decl
);
5433 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
5441 The memory occupied by any object of static storage
5442 duration is zero-initialized at program startup before
5443 any other initialization takes place.
5445 We cannot create an appropriate initializer until after
5446 the type of DECL is finalized. If DECL_INITIAL is set,
5447 then the DECL is statically initialized, and any
5448 necessary zero-initialization has already been performed. */
5449 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
5450 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
5451 /*nelts=*/NULL_TREE
,
5452 /*static_storage_p=*/true);
5453 /* Remember that the initialization for this variable has
5455 DECL_INITIALIZED_P (decl
) = 1;
5456 /* This declaration is the definition of this variable,
5457 unless we are initializing a static data member within
5458 the class specifier. */
5459 if (!DECL_EXTERNAL (decl
))
5460 var_definition_p
= true;
5462 /* If the variable has an array type, lay out the type, even if
5463 there is no initializer. It is valid to index through the
5464 array, and we must get TYPE_ALIGN set correctly on the array
5466 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5470 /* Add this declaration to the statement-tree. This needs to happen
5471 after the call to check_initializer so that the DECL_EXPR for a
5472 reference temp is added before the DECL_EXPR for the reference itself. */
5473 if (at_function_scope_p ())
5474 add_decl_expr (decl
);
5476 /* Let the middle end know about variables and functions -- but not
5477 static data members in uninstantiated class templates. */
5478 if (!saved_processing_template_decl
5479 && (TREE_CODE (decl
) == VAR_DECL
5480 || TREE_CODE (decl
) == FUNCTION_DECL
))
5482 if (TREE_CODE (decl
) == VAR_DECL
)
5484 layout_var_decl (decl
);
5485 maybe_commonize_var (decl
);
5488 /* This needs to happen after the linkage is set. */
5489 determine_visibility (decl
);
5491 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
5493 /* Check for abstractness of the type. Notice that there is no
5494 need to strip array types here since the check for those types
5495 is already done within create_array_type_for_decl. */
5496 if (TREE_CODE (type
) == FUNCTION_TYPE
5497 || TREE_CODE (type
) == METHOD_TYPE
)
5498 abstract_virtuals_error (decl
, TREE_TYPE (type
));
5500 abstract_virtuals_error (decl
, type
);
5502 if (TREE_CODE (decl
) == FUNCTION_DECL
5503 || TREE_TYPE (decl
) == error_mark_node
)
5504 /* No initialization required. */
5506 else if (DECL_EXTERNAL (decl
)
5507 && ! (DECL_LANG_SPECIFIC (decl
)
5508 && DECL_NOT_REALLY_EXTERN (decl
)))
5511 DECL_INITIAL (decl
) = init
;
5515 /* A variable definition. */
5516 if (DECL_FUNCTION_SCOPE_P (decl
))
5518 /* Initialize the local variable. */
5519 if (processing_template_decl
)
5520 DECL_INITIAL (decl
) = init
;
5521 else if (!TREE_STATIC (decl
))
5522 initialize_local_var (decl
, init
);
5525 /* If a variable is defined, and then a subsequent
5526 definition with external linkage is encountered, we will
5527 get here twice for the same variable. We want to avoid
5528 calling expand_static_init more than once. For variables
5529 that are not static data members, we can call
5530 expand_static_init only when we actually process the
5531 initializer. It is not legal to redeclare a static data
5532 member, so this issue does not arise in that case. */
5533 if (var_definition_p
&& TREE_STATIC (decl
))
5535 /* If a TREE_READONLY variable needs initialization
5536 at runtime, it is no longer readonly and we need to
5537 avoid MEM_READONLY_P being set on RTL created for it. */
5540 if (TREE_READONLY (decl
))
5541 TREE_READONLY (decl
) = 0;
5544 expand_static_init (decl
, init
);
5549 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5550 reference, insert it in the statement-tree now. */
5552 push_cleanup (decl
, cleanup
, false);
5555 processing_template_decl
= saved_processing_template_decl
;
5558 TREE_READONLY (decl
) = 1;
5560 /* If this was marked 'used', be sure it will be output. */
5561 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl
)))
5562 mark_decl_referenced (decl
);
5565 /* This is here for a midend callback from c-common.c. */
5568 finish_decl (tree decl
, tree init
, tree asmspec_tree
)
5570 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, asmspec_tree
, 0);
5573 /* Returns a declaration for a VAR_DECL as if:
5575 extern "C" TYPE NAME;
5577 had been seen. Used to create compiler-generated global
5581 declare_global_var (tree name
, tree type
)
5585 push_to_top_level ();
5586 decl
= build_decl (VAR_DECL
, name
, type
);
5587 TREE_PUBLIC (decl
) = 1;
5588 DECL_EXTERNAL (decl
) = 1;
5589 DECL_ARTIFICIAL (decl
) = 1;
5590 /* If the user has explicitly declared this variable (perhaps
5591 because the code we are compiling is part of a low-level runtime
5592 library), then it is possible that our declaration will be merged
5593 with theirs by pushdecl. */
5594 decl
= pushdecl (decl
);
5595 finish_decl (decl
, NULL_TREE
, NULL_TREE
);
5596 pop_from_top_level ();
5601 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5602 if "__cxa_atexit" is not being used) corresponding to the function
5603 to be called when the program exits. */
5606 get_atexit_fn_ptr_type (void)
5611 if (!atexit_fn_ptr_type_node
)
5613 if (flag_use_cxa_atexit
5614 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
5615 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5616 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5618 /* The parameter to "atexit" is "void (*)(void)". */
5619 arg_types
= void_list_node
;
5621 fn_type
= build_function_type (void_type_node
, arg_types
);
5622 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
5625 return atexit_fn_ptr_type_node
;
5628 /* Returns a pointer to the `atexit' function. Note that if
5629 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5630 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5633 get_atexit_node (void)
5640 bool use_aeabi_atexit
;
5645 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
5647 /* The declaration for `__cxa_atexit' is:
5649 int __cxa_atexit (void (*)(void *), void *, void *)
5651 We build up the argument types and then then function type
5654 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
5655 /* First, build the pointer-to-function type for the first
5657 fn_ptr_type
= get_atexit_fn_ptr_type ();
5658 /* Then, build the rest of the argument types. */
5659 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5660 if (use_aeabi_atexit
)
5662 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
5663 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
5667 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
5668 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
5670 /* And the final __cxa_atexit type. */
5671 fn_type
= build_function_type (integer_type_node
, arg_types
);
5672 fn_ptr_type
= build_pointer_type (fn_type
);
5673 if (use_aeabi_atexit
)
5674 name
= "__aeabi_atexit";
5676 name
= "__cxa_atexit";
5680 /* The declaration for `atexit' is:
5682 int atexit (void (*)());
5684 We build up the argument types and then then function type
5686 fn_ptr_type
= get_atexit_fn_ptr_type ();
5687 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, void_list_node
);
5688 /* Build the final atexit type. */
5689 fn_type
= build_function_type (integer_type_node
, arg_types
);
5693 /* Now, build the function declaration. */
5694 push_lang_context (lang_name_c
);
5695 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
5696 mark_used (atexit_fndecl
);
5697 pop_lang_context ();
5698 atexit_node
= decay_conversion (atexit_fndecl
);
5703 /* Returns the __dso_handle VAR_DECL. */
5706 get_dso_handle_node (void)
5708 if (dso_handle_node
)
5709 return dso_handle_node
;
5711 /* Declare the variable. */
5712 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
5715 return dso_handle_node
;
5718 /* Begin a new function with internal linkage whose job will be simply
5719 to destroy some particular variable. */
5721 static GTY(()) int start_cleanup_cnt
;
5724 start_cleanup_fn (void)
5729 bool use_cxa_atexit
= flag_use_cxa_atexit
5730 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
5732 push_to_top_level ();
5734 /* No need to mangle this. */
5735 push_lang_context (lang_name_c
);
5737 /* Build the name of the function. */
5738 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
5739 /* Build the function declaration. */
5740 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
5741 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
5742 /* It's a function with internal linkage, generated by the
5744 TREE_PUBLIC (fndecl
) = 0;
5745 DECL_ARTIFICIAL (fndecl
) = 1;
5746 /* Make the function `inline' so that it is only emitted if it is
5747 actually needed. It is unlikely that it will be inlined, since
5748 it is only called via a function pointer, but we avoid unnecessary
5749 emissions this way. */
5750 DECL_INLINE (fndecl
) = 1;
5751 DECL_DECLARED_INLINE_P (fndecl
) = 1;
5752 DECL_INTERFACE_KNOWN (fndecl
) = 1;
5753 /* Build the parameter. */
5758 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
5759 DECL_CONTEXT (parmdecl
) = fndecl
;
5760 TREE_USED (parmdecl
) = 1;
5761 DECL_ARGUMENTS (fndecl
) = parmdecl
;
5765 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
5767 pop_lang_context ();
5769 return current_function_decl
;
5772 /* Finish the cleanup function begun by start_cleanup_fn. */
5775 end_cleanup_fn (void)
5777 expand_or_defer_fn (finish_function (0));
5779 pop_from_top_level ();
5782 /* Generate code to handle the destruction of DECL, an object with
5783 static storage duration. */
5786 register_dtor_fn (tree decl
)
5795 type
= TREE_TYPE (decl
);
5796 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
5797 return void_zero_node
;
5799 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
5800 a class object, we can just pass the destructor to
5801 "__cxa_atexit"; we don't have to build a temporary function to do
5803 use_dtor
= (flag_use_cxa_atexit
5804 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()
5805 && CLASS_TYPE_P (type
));
5810 /* Find the destructor. */
5811 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
5812 gcc_assert (idx
>= 0);
5813 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
5814 /* Make sure it is accessible. */
5815 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
);
5819 /* Call build_cleanup before we enter the anonymous function so
5820 that any access checks will be done relative to the current
5821 scope, rather than the scope of the anonymous function. */
5822 build_cleanup (decl
);
5824 /* Now start the function. */
5825 cleanup
= start_cleanup_fn ();
5827 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5828 to the original function, rather than the anonymous one. That
5829 will make the back end think that nested functions are in use,
5830 which causes confusion. */
5831 push_deferring_access_checks (dk_no_check
);
5832 fcall
= build_cleanup (decl
);
5833 pop_deferring_access_checks ();
5835 /* Create the body of the anonymous function. */
5836 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
5837 finish_expr_stmt (fcall
);
5838 finish_compound_stmt (compound_stmt
);
5842 /* Call atexit with the cleanup function. */
5843 mark_used (cleanup
);
5844 cleanup
= build_address (cleanup
);
5845 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
5851 /* We must convert CLEANUP to the type that "__cxa_atexit"
5853 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
5854 /* "__cxa_atexit" will pass the address of DECL to the
5855 cleanup function. */
5857 addr
= build_address (decl
);
5858 /* The declared type of the parameter to "__cxa_atexit" is
5859 "void *". For plain "T*", we could just let the
5860 machinery in build_function_call convert it -- but if the
5861 type is "cv-qualified T *", then we need to convert it
5862 before passing it in, to avoid spurious errors. */
5863 addr
= build_nop (ptr_type_node
, addr
);
5866 /* Since the cleanup functions we build ignore the address
5867 they're given, there's no reason to pass the actual address
5868 in, and, in general, it's cheaper to pass NULL than any
5870 addr
= null_pointer_node
;
5871 args
= tree_cons (NULL_TREE
,
5872 build_unary_op (ADDR_EXPR
, get_dso_handle_node (), 0),
5874 if (targetm
.cxx
.use_aeabi_atexit ())
5876 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5877 args
= tree_cons (NULL_TREE
, addr
, args
);
5881 args
= tree_cons (NULL_TREE
, addr
, args
);
5882 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5886 args
= tree_cons (NULL_TREE
, cleanup
, NULL_TREE
);
5887 return build_function_call (get_atexit_node (), args
);
5890 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5891 is its initializer. Generate code to handle the construction
5892 and destruction of DECL. */
5895 expand_static_init (tree decl
, tree init
)
5897 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
5898 gcc_assert (TREE_STATIC (decl
));
5900 /* Some variables require no initialization. */
5902 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
5903 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5906 if (DECL_FUNCTION_SCOPE_P (decl
))
5908 /* Emit code to perform this initialization but once. */
5909 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
5910 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
5911 tree guard
, guard_addr
;
5912 tree acquire_fn
, release_fn
, abort_fn
;
5915 /* Emit code to perform this initialization but once. This code
5918 static <type> guard;
5919 if (!guard.first_byte) {
5920 if (__cxa_guard_acquire (&guard)) {
5923 // Do initialization.
5924 flag = true; __cxa_guard_release (&guard);
5925 // Register variable for destruction at end of program.
5927 if (!flag) __cxa_guard_abort (&guard);
5931 Note that the `flag' variable is only set to 1 *after* the
5932 initialization is complete. This ensures that an exception,
5933 thrown during the construction, will cause the variable to
5934 reinitialized when we pass through this code again, as per:
5938 If the initialization exits by throwing an exception, the
5939 initialization is not complete, so it will be tried again
5940 the next time control enters the declaration.
5942 This process should be thread-safe, too; multiple threads
5943 should not be able to initialize the variable more than
5946 /* Create the guard variable. */
5947 guard
= get_guard (decl
);
5949 /* This optimization isn't safe on targets with relaxed memory
5950 consistency. On such targets we force synchronization in
5951 __cxa_guard_acquire. */
5952 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
5954 /* Begin the conditional initialization. */
5955 if_stmt
= begin_if_stmt ();
5956 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
5957 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5960 if (flag_threadsafe_statics
)
5962 guard_addr
= build_address (guard
);
5964 acquire_fn
= get_identifier ("__cxa_guard_acquire");
5965 release_fn
= get_identifier ("__cxa_guard_release");
5966 abort_fn
= get_identifier ("__cxa_guard_abort");
5967 if (!get_global_value_if_present (acquire_fn
, &acquire_fn
))
5969 tree argtypes
= tree_cons (NULL_TREE
, TREE_TYPE (guard_addr
),
5971 tree vfntype
= build_function_type (void_type_node
, argtypes
);
5972 acquire_fn
= push_library_fn
5973 (acquire_fn
, build_function_type (integer_type_node
, argtypes
));
5974 release_fn
= push_library_fn (release_fn
, vfntype
);
5975 abort_fn
= push_library_fn (abort_fn
, vfntype
);
5979 release_fn
= identifier_global_value (release_fn
);
5980 abort_fn
= identifier_global_value (abort_fn
);
5983 inner_if_stmt
= begin_if_stmt ();
5984 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
5987 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5988 begin
= get_target_expr (boolean_false_node
);
5989 flag
= TARGET_EXPR_SLOT (begin
);
5991 TARGET_EXPR_CLEANUP (begin
)
5992 = build3 (COND_EXPR
, void_type_node
, flag
,
5994 build_call_n (abort_fn
, 1, guard_addr
));
5995 CLEANUP_EH_ONLY (begin
) = 1;
5997 /* Do the initialization itself. */
5998 init
= add_stmt_to_compound (begin
, init
);
5999 init
= add_stmt_to_compound
6000 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
6001 init
= add_stmt_to_compound
6002 (init
, build_call_n (release_fn
, 1, guard_addr
));
6005 init
= add_stmt_to_compound (init
, set_guard (guard
));
6007 /* Use atexit to register a function for destroying this static
6009 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
6011 finish_expr_stmt (init
);
6013 if (flag_threadsafe_statics
)
6015 finish_compound_stmt (inner_then_clause
);
6016 finish_then_clause (inner_if_stmt
);
6017 finish_if_stmt (inner_if_stmt
);
6020 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6022 finish_compound_stmt (then_clause
);
6023 finish_then_clause (if_stmt
);
6024 finish_if_stmt (if_stmt
);
6028 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
6032 /* Make TYPE a complete type based on INITIAL_VALUE.
6033 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6034 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6035 3 if the initializer list is empty (in pedantic mode). */
6038 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
6041 tree type
, elt_type
;
6045 /* An array of character type can be initialized from a
6046 brace-enclosed string constant.
6048 FIXME: this code is duplicated from reshape_init. Probably
6049 we should just call reshape_init here? */
6050 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
6051 && TREE_CODE (initial_value
) == CONSTRUCTOR
6052 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
6054 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
6055 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
6057 if (TREE_CODE (value
) == STRING_CST
6058 && VEC_length (constructor_elt
, v
) == 1)
6059 initial_value
= value
;
6063 failure
= complete_array_type (ptype
, initial_value
, do_default
);
6065 /* We can create the array before the element type is complete, which
6066 means that we didn't have these two bits set in the original type
6067 either. In completing the type, we are expected to propagate these
6068 bits. See also complete_type which does the same thing for arrays
6071 if (TYPE_DOMAIN (type
))
6073 elt_type
= TREE_TYPE (type
);
6074 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
6075 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
6076 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
6082 /* Return zero if something is declared to be a member of type
6083 CTYPE when in the context of CUR_TYPE. STRING is the error
6084 message to print in that case. Otherwise, quietly return 1. */
6087 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
6089 if (ctype
&& ctype
!= cur_type
)
6091 if (flags
== DTOR_FLAG
)
6092 error ("destructor for alien class %qT cannot be a member", ctype
);
6094 error ("constructor for alien class %qT cannot be a member", ctype
);
6100 /* Subroutine of `grokdeclarator'. */
6102 /* Generate errors possibly applicable for a given set of specifiers.
6103 This is for ARM $7.1.2. */
6106 bad_specifiers (tree object
,
6115 error ("%qD declared as a %<virtual%> %s", object
, type
);
6117 error ("%qD declared as an %<inline%> %s", object
, type
);
6119 error ("%<const%> and %<volatile%> function specifiers on "
6120 "%qD invalid in %s declaration",
6123 error ("%q+D declared as a friend", object
);
6125 && (TREE_CODE (object
) == TYPE_DECL
6126 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
6127 && !TYPE_REFFN_P (TREE_TYPE (object
))
6128 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
6129 error ("%q+D declared with an exception specification", object
);
6132 /* DECL is a member function or static data member and is presently
6133 being defined. Check that the definition is taking place in a
6137 check_class_member_definition_namespace (tree decl
)
6139 /* These checks only apply to member functions and static data
6141 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
6142 || TREE_CODE (decl
) == VAR_DECL
);
6143 /* We check for problems with specializations in pt.c in
6144 check_specialization_namespace, where we can issue better
6146 if (processing_specialization
)
6148 /* There are no restrictions on the placement of
6149 explicit instantiations. */
6150 if (processing_explicit_instantiation
)
6154 A member function definition that appears outside of the
6155 class definition shall appear in a namespace scope enclosing
6156 the class definition.
6160 The definition for a static data member shall appear in a
6161 namespace scope enclosing the member's class definition. */
6162 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
6163 pedwarn ("definition of %qD is not in namespace enclosing %qT",
6164 decl
, DECL_CONTEXT (decl
));
6167 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6168 METHOD_TYPE for a non-static member function; QUALS are the
6169 cv-qualifiers that apply to the function. */
6172 build_this_parm (tree type
, cp_cv_quals quals
)
6177 cp_cv_quals this_quals
;
6179 this_type
= TREE_VALUE (TYPE_ARG_TYPES (type
));
6180 /* The `this' parameter is implicitly `const'; it cannot be
6182 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
6183 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
6184 parm
= build_artificial_parm (this_identifier
, qual_type
);
6185 cp_apply_type_quals_to_decl (this_quals
, parm
);
6189 /* CTYPE is class type, or null if non-class.
6190 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6192 DECLARATOR is the function's name.
6193 PARMS is a chain of PARM_DECLs for the function.
6194 VIRTUALP is truthvalue of whether the function is virtual or not.
6195 FLAGS are to be passed through to `grokclassfn'.
6196 QUALS are qualifiers indicating whether the function is `const'
6198 RAISES is a list of exceptions that this function can raise.
6199 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6200 not look, and -1 if we should not call `grokclassfn' at all.
6202 SFK is the kind of special function (if any) for the new function.
6204 Returns `NULL_TREE' if something goes wrong, after issuing
6205 applicable error messages. */
6208 grokfndecl (tree ctype
,
6212 tree orig_declarator
,
6214 enum overload_flags flags
,
6221 special_function_kind sfk
,
6228 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
6232 type
= build_exception_variant (type
, raises
);
6234 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
6235 if (TREE_CODE (type
) == METHOD_TYPE
)
6238 parm
= build_this_parm (type
, quals
);
6239 TREE_CHAIN (parm
) = parms
;
6242 DECL_ARGUMENTS (decl
) = parms
;
6243 /* Propagate volatile out from type to decl. */
6244 if (TYPE_VOLATILE (type
))
6245 TREE_THIS_VOLATILE (decl
) = 1;
6247 /* Setup decl according to sfk. */
6250 case sfk_constructor
:
6251 case sfk_copy_constructor
:
6252 DECL_CONSTRUCTOR_P (decl
) = 1;
6254 case sfk_destructor
:
6255 DECL_DESTRUCTOR_P (decl
) = 1;
6261 /* If pointers to member functions use the least significant bit to
6262 indicate whether a function is virtual, ensure a pointer
6263 to this function will have that bit clear. */
6264 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
6265 && TREE_CODE (type
) == METHOD_TYPE
6266 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
6267 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
6270 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
6274 ("defining explicit specialization %qD in friend declaration",
6278 tree fns
= TREE_OPERAND (orig_declarator
, 0);
6279 tree args
= TREE_OPERAND (orig_declarator
, 1);
6281 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6283 /* Something like `template <class T> friend void f<T>()'. */
6284 error ("invalid use of template-id %qD in declaration "
6285 "of primary template",
6291 /* A friend declaration of the form friend void f<>(). Record
6292 the information in the TEMPLATE_ID_EXPR. */
6293 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
6295 if (TREE_CODE (fns
) == COMPONENT_REF
)
6297 /* Due to bison parser ickiness, we will have already looked
6298 up an operator_name or PFUNCNAME within the current class
6299 (see template_id in parse.y). If the current class contains
6300 such a name, we'll get a COMPONENT_REF here. Undo that. */
6302 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
6303 == current_class_type
);
6304 fns
= TREE_OPERAND (fns
, 1);
6306 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
6307 || TREE_CODE (fns
) == OVERLOAD
);
6308 DECL_TEMPLATE_INFO (decl
) = tree_cons (fns
, args
, NULL_TREE
);
6310 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
6311 if (TREE_PURPOSE (t
)
6312 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
6314 error ("default arguments are not allowed in declaration "
6315 "of friend template specialization %qD",
6322 error ("%<inline%> is not allowed in declaration of friend "
6323 "template specialization %qD",
6330 /* If this decl has namespace scope, set that up. */
6332 set_decl_namespace (decl
, in_namespace
, friendp
);
6334 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
6336 /* `main' and builtins have implicit 'C' linkage. */
6337 if ((MAIN_NAME_P (declarator
)
6338 || (IDENTIFIER_LENGTH (declarator
) > 10
6339 && IDENTIFIER_POINTER (declarator
)[0] == '_'
6340 && IDENTIFIER_POINTER (declarator
)[1] == '_'
6341 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
6342 && current_lang_name
== lang_name_cplusplus
6343 && ctype
== NULL_TREE
6344 /* NULL_TREE means global namespace. */
6345 && DECL_CONTEXT (decl
) == NULL_TREE
)
6346 SET_DECL_LANGUAGE (decl
, lang_c
);
6348 /* Should probably propagate const out from type to decl I bet (mrs). */
6351 DECL_STATIC_FUNCTION_P (decl
) = 1;
6352 DECL_CONTEXT (decl
) = ctype
;
6357 DECL_CONTEXT (decl
) = ctype
;
6359 check_class_member_definition_namespace (decl
);
6362 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
6364 if (processing_template_decl
)
6365 error ("cannot declare %<::main%> to be a template");
6367 error ("cannot declare %<::main%> to be inline");
6369 error ("cannot declare %<::main%> to be static");
6374 /* Members of anonymous types and local classes have no linkage; make
6375 them internal. If a typedef is made later, this will be changed. */
6376 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
6377 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
6382 /* [basic.link]: A name with no linkage (notably, the name of a class
6383 or enumeration declared in a local scope) shall not be used to
6384 declare an entity with linkage.
6386 Only check this for public decls for now. See core 319, 389. */
6387 t
= no_linkage_check (TREE_TYPE (decl
),
6388 /*relaxed_p=*/false);
6391 if (TYPE_ANONYMOUS_P (t
))
6393 if (DECL_EXTERN_C_P (decl
))
6394 /* Allow this; it's pretty common in C. */;
6397 pedwarn ("non-local function %q#D uses anonymous type",
6399 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
6400 pedwarn ("%q+#D does not refer to the unqualified "
6401 "type, so it is not used for linkage",
6406 pedwarn ("non-local function %q#D uses local type %qT", decl
, t
);
6410 TREE_PUBLIC (decl
) = publicp
;
6413 DECL_INTERFACE_KNOWN (decl
) = 1;
6414 DECL_NOT_REALLY_EXTERN (decl
) = 1;
6417 /* If the declaration was declared inline, mark it as such. */
6419 DECL_DECLARED_INLINE_P (decl
) = 1;
6420 /* We inline functions that are explicitly declared inline, or, when
6421 the user explicitly asks us to, all functions. */
6422 if (DECL_DECLARED_INLINE_P (decl
)
6423 || (flag_inline_trees
== 2 && !DECL_INLINE (decl
) && funcdef_flag
))
6424 DECL_INLINE (decl
) = 1;
6426 DECL_EXTERNAL (decl
) = 1;
6427 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
6430 ? G_("static member function %qD cannot have cv-qualifier")
6431 : G_("non-member function %qD cannot have cv-qualifier"),
6433 quals
= TYPE_UNQUALIFIED
;
6436 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
6437 && !grok_op_properties (decl
, /*complain=*/true))
6440 if (ctype
&& decl_function_context (decl
))
6441 DECL_NO_STATIC_CHAIN (decl
) = 1;
6444 /* Make the init_value nonzero so pushdecl knows this is not
6445 tentative. error_mark_node is replaced later with the BLOCK. */
6446 DECL_INITIAL (decl
) = error_mark_node
;
6448 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
6449 TREE_NOTHROW (decl
) = 1;
6451 /* Caller will do the rest of this. */
6455 if (ctype
!= NULL_TREE
)
6456 grokclassfn (ctype
, decl
, flags
);
6458 decl
= check_explicit_specialization (orig_declarator
, decl
,
6461 4 * (friendp
!= 0));
6462 if (decl
== error_mark_node
)
6467 cplus_decl_attributes (&decl
, *attrlist
, 0);
6468 *attrlist
= NULL_TREE
;
6471 /* Check main's type after attributes have been applied. */
6472 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
6474 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
6477 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
6479 error ("%<::main%> must return %<int%>");
6480 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
6481 TREE_TYPE (decl
) = newtype
;
6483 check_main_parameter_types (decl
);
6486 if (ctype
!= NULL_TREE
6487 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
6490 tree old_decl
= check_classfn (ctype
, decl
,
6491 (processing_template_decl
6492 > template_class_depth (ctype
))
6493 ? current_template_parms
6496 if (old_decl
== error_mark_node
)
6504 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
6505 /* Because grokfndecl is always supposed to return a
6506 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6507 here. We depend on our callers to figure out that its
6508 really a template that's being returned. */
6509 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
6511 if (DECL_STATIC_FUNCTION_P (old_decl
)
6512 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
6513 /* Remove the `this' parm added by grokclassfn.
6514 XXX Isn't this done in start_function, too? */
6515 revert_static_member_fn (decl
);
6516 if (DECL_ARTIFICIAL (old_decl
))
6517 error ("definition of implicitly-declared %qD", old_decl
);
6519 /* Since we've smashed OLD_DECL to its
6520 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6521 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
6522 decl
= DECL_TEMPLATE_RESULT (decl
);
6524 /* Attempt to merge the declarations. This can fail, in
6525 the case of some invalid specialization declarations. */
6526 pushed_scope
= push_scope (ctype
);
6527 ok
= duplicate_decls (decl
, old_decl
, friendp
);
6529 pop_scope (pushed_scope
);
6532 error ("no %q#D member function declared in class %qT",
6540 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
6543 if (ctype
== NULL_TREE
|| check
)
6547 DECL_VIRTUAL_P (decl
) = 1;
6552 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6553 the linkage that DECL will receive in the object file. */
6556 set_linkage_for_static_data_member (tree decl
)
6558 /* A static data member always has static storage duration and
6559 external linkage. Note that static data members are forbidden in
6560 local classes -- the only situation in which a class has
6561 non-external linkage. */
6562 TREE_PUBLIC (decl
) = 1;
6563 TREE_STATIC (decl
) = 1;
6564 /* For non-template classes, static data members are always put
6565 out in exactly those files where they are defined, just as
6566 with ordinary namespace-scope variables. */
6567 if (!processing_template_decl
)
6568 DECL_INTERFACE_KNOWN (decl
) = 1;
6571 /* Create a VAR_DECL named NAME with the indicated TYPE.
6573 If SCOPE is non-NULL, it is the class type or namespace containing
6574 the variable. If SCOPE is NULL, the variable should is created in
6575 the innermost enclosings scope. */
6578 grokvardecl (tree type
,
6580 const cp_decl_specifier_seq
*declspecs
,
6586 tree explicit_scope
;
6588 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
6590 /* Compute the scope in which to place the variable, but remember
6591 whether or not that scope was explicitly specified by the user. */
6592 explicit_scope
= scope
;
6595 /* An explicit "extern" specifier indicates a namespace-scope
6597 if (declspecs
->storage_class
== sc_extern
)
6598 scope
= current_namespace
;
6599 else if (!at_function_scope_p ())
6600 scope
= current_scope ();
6604 && (/* If the variable is a namespace-scope variable declared in a
6605 template, we need DECL_LANG_SPECIFIC. */
6606 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
6607 /* Similarly for namespace-scope variables with language linkage
6609 || (TREE_CODE (scope
) == NAMESPACE_DECL
6610 && current_lang_name
!= lang_name_cplusplus
)
6611 /* Similarly for static data members. */
6613 decl
= build_lang_decl (VAR_DECL
, name
, type
);
6615 decl
= build_decl (VAR_DECL
, name
, type
);
6617 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
6618 set_decl_namespace (decl
, explicit_scope
, 0);
6620 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
6622 if (declspecs
->storage_class
== sc_extern
)
6624 DECL_THIS_EXTERN (decl
) = 1;
6625 DECL_EXTERNAL (decl
) = !initialized
;
6628 if (DECL_CLASS_SCOPE_P (decl
))
6630 set_linkage_for_static_data_member (decl
);
6631 /* This function is only called with out-of-class definitions. */
6632 DECL_EXTERNAL (decl
) = 0;
6633 check_class_member_definition_namespace (decl
);
6635 /* At top level, either `static' or no s.c. makes a definition
6636 (perhaps tentative), and absence of `static' makes it public. */
6637 else if (toplevel_bindings_p ())
6639 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
6640 && (DECL_THIS_EXTERN (decl
) || ! constp
));
6641 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
6643 /* Not at top level, only `static' makes a static definition. */
6646 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
6647 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
6650 if (declspecs
->specs
[(int)ds_thread
])
6651 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
6653 if (TREE_PUBLIC (decl
))
6655 /* [basic.link]: A name with no linkage (notably, the name of a class
6656 or enumeration declared in a local scope) shall not be used to
6657 declare an entity with linkage.
6659 Only check this for public decls for now. */
6660 tree t
= no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false);
6663 if (TYPE_ANONYMOUS_P (t
))
6665 if (DECL_EXTERN_C_P (decl
))
6666 /* Allow this; it's pretty common in C. */
6670 /* DRs 132, 319 and 389 seem to indicate types with
6671 no linkage can only be used to declare extern "C"
6672 entities. Since it's not always an error in the
6673 ISO C++ 90 Standard, we only issue a warning. */
6674 warning (0, "non-local variable %q#D uses anonymous type",
6676 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
6677 warning (0, "%q+#D does not refer to the unqualified "
6678 "type, so it is not used for linkage",
6683 warning (0, "non-local variable %q#D uses local type %qT", decl
, t
);
6687 DECL_INTERFACE_KNOWN (decl
) = 1;
6692 /* Create and return a canonical pointer to member function type, for
6693 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6696 build_ptrmemfunc_type (tree type
)
6700 tree unqualified_variant
= NULL_TREE
;
6702 if (type
== error_mark_node
)
6705 /* If a canonical type already exists for this type, use it. We use
6706 this method instead of type_hash_canon, because it only does a
6707 simple equality check on the list of field members. */
6709 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
6712 /* Make sure that we always have the unqualified pointer-to-member
6714 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6716 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
6718 t
= make_aggr_type (RECORD_TYPE
);
6719 xref_basetypes (t
, NULL_TREE
);
6721 /* Let the front end know this is a pointer to member function... */
6722 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
6723 /* ... and not really an aggregate. */
6724 SET_IS_AGGR_TYPE (t
, 0);
6726 field
= build_decl (FIELD_DECL
, pfn_identifier
, type
);
6729 field
= build_decl (FIELD_DECL
, delta_identifier
, delta_type_node
);
6730 TREE_CHAIN (field
) = fields
;
6733 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
6735 /* Zap out the name so that the back end will give us the debugging
6736 information for this anonymous RECORD_TYPE. */
6737 TYPE_NAME (t
) = NULL_TREE
;
6739 /* If this is not the unqualified form of this pointer-to-member
6740 type, set the TYPE_MAIN_VARIANT for this type to be the
6741 unqualified type. Since they are actually RECORD_TYPEs that are
6742 not variants of each other, we must do this manually. */
6743 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6745 t
= build_qualified_type (t
, cp_type_quals (type
));
6746 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
6747 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
6748 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
6751 /* Cache this pointer-to-member type so that we can find it again
6753 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
6755 /* Managing canonical types for the RECORD_TYPE behind a
6756 pointer-to-member function is a nightmare, so use structural
6757 equality for now. */
6758 SET_TYPE_STRUCTURAL_EQUALITY (t
);
6763 /* Create and return a pointer to data member type. */
6766 build_ptrmem_type (tree class_type
, tree member_type
)
6768 if (TREE_CODE (member_type
) == METHOD_TYPE
)
6772 arg_types
= TYPE_ARG_TYPES (member_type
);
6773 class_type
= (cp_build_qualified_type
6775 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types
)))));
6777 = build_method_type_directly (class_type
,
6778 TREE_TYPE (member_type
),
6779 TREE_CHAIN (arg_types
));
6780 return build_ptrmemfunc_type (build_pointer_type (member_type
));
6784 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
6785 return build_offset_type (class_type
, member_type
);
6789 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6790 Check to see that the definition is valid. Issue appropriate error
6791 messages. Return 1 if the definition is particularly bad, or 0
6795 check_static_variable_definition (tree decl
, tree type
)
6797 /* Motion 10 at San Diego: If a static const integral data member is
6798 initialized with an integral constant expression, the initializer
6799 may appear either in the declaration (within the class), or in
6800 the definition, but not both. If it appears in the class, the
6801 member is a member constant. The file-scope definition is always
6803 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
6805 error ("invalid in-class initialization of static data member "
6806 "of non-integral type %qT",
6808 /* If we just return the declaration, crashes will sometimes
6809 occur. We therefore return void_type_node, as if this were a
6810 friend declaration, to cause callers to completely ignore
6811 this declaration. */
6814 else if (!CP_TYPE_CONST_P (type
))
6815 error ("ISO C++ forbids in-class initialization of non-const "
6816 "static member %qD",
6818 else if (pedantic
&& !INTEGRAL_TYPE_P (type
))
6819 pedwarn ("ISO C++ forbids initialization of member constant "
6820 "%qD of non-integral type %qT", decl
, type
);
6825 /* Given the SIZE (i.e., number of elements) in an array, compute an
6826 appropriate index type for the array. If non-NULL, NAME is the
6827 name of the thing being declared. */
6830 compute_array_index_type (tree name
, tree size
)
6834 tree abi_1_itype
= NULL_TREE
;
6836 if (error_operand_p (size
))
6837 return error_mark_node
;
6839 type
= TREE_TYPE (size
);
6840 /* The array bound must be an integer type. */
6841 if (!dependent_type_p (type
) && !INTEGRAL_TYPE_P (type
))
6844 error ("size of array %qD has non-integral type %qT", name
, type
);
6846 error ("size of array has non-integral type %qT", type
);
6847 size
= integer_one_node
;
6848 type
= TREE_TYPE (size
);
6851 if (value_dependent_expression_p (size
))
6853 /* We cannot do any checking for a value-dependent SIZE. Just
6854 build the index type and mark that it requires structural
6856 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
6857 size
, integer_one_node
));
6858 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
6862 if (!abi_version_at_least (2) && processing_template_decl
)
6863 /* For abi-1, we handled all instances in templates the same way,
6864 even when they were non-dependent. This effects the manglings
6865 produced. So, we do the normal checking for non-dependent
6866 sizes, but at the end we'll return the same type that abi-1
6867 would have, but with TYPE_CANONICAL set to the "right"
6868 value that the current ABI would provide. */
6869 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
6870 size
, integer_one_node
));
6872 /* The size might be the result of a cast. */
6873 STRIP_TYPE_NOPS (size
);
6875 /* It might be a const variable or enumeration constant. */
6876 size
= integral_constant_value (size
);
6878 /* Normally, the array-bound will be a constant. */
6879 if (TREE_CODE (size
) == INTEGER_CST
)
6881 /* Check to see if the array bound overflowed. Make that an
6882 error, no matter how generous we're being. */
6883 int old_flag_pedantic_errors
= flag_pedantic_errors
;
6884 int old_pedantic
= pedantic
;
6885 pedantic
= flag_pedantic_errors
= 1;
6886 constant_expression_warning (size
);
6887 pedantic
= old_pedantic
;
6888 flag_pedantic_errors
= old_flag_pedantic_errors
;
6890 /* An array must have a positive number of elements. */
6891 if (INT_CST_LT (size
, integer_zero_node
))
6894 error ("size of array %qD is negative", name
);
6896 error ("size of array is negative");
6897 size
= integer_one_node
;
6899 /* As an extension we allow zero-sized arrays. We always allow
6900 them in system headers because glibc uses them. */
6901 else if (integer_zerop (size
) && pedantic
&& !in_system_header
)
6904 pedwarn ("ISO C++ forbids zero-size array %qD", name
);
6906 pedwarn ("ISO C++ forbids zero-size array");
6909 else if (TREE_CONSTANT (size
))
6911 /* `(int) &fn' is not a valid array bound. */
6913 error ("size of array %qD is not an integral constant-expression",
6916 error ("size of array is not an integral constant-expression");
6917 size
= integer_one_node
;
6919 else if (pedantic
&& warn_vla
!= 0)
6922 pedwarn ("ISO C++ forbids variable length array %qD", name
);
6924 pedwarn ("ISO C++ forbids variable length array");
6926 else if (warn_vla
> 0)
6930 "variable length array %qD is used", name
);
6933 "variable length array is used");
6936 if (processing_template_decl
&& !TREE_CONSTANT (size
))
6937 /* A variable sized array. */
6938 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
6941 HOST_WIDE_INT saved_processing_template_decl
;
6943 /* Compute the index of the largest element in the array. It is
6944 one less than the number of elements in the array. We save
6945 and restore PROCESSING_TEMPLATE_DECL so that computations in
6946 cp_build_binary_op will be appropriately folded. */
6947 saved_processing_template_decl
= processing_template_decl
;
6948 processing_template_decl
= 0;
6949 itype
= cp_build_binary_op (MINUS_EXPR
,
6950 cp_convert (ssizetype
, size
),
6951 cp_convert (ssizetype
, integer_one_node
));
6952 itype
= fold (itype
);
6953 processing_template_decl
= saved_processing_template_decl
;
6955 if (!TREE_CONSTANT (itype
))
6956 /* A variable sized array. */
6957 itype
= variable_size (itype
);
6958 /* Make sure that there was no overflow when creating to a signed
6959 index type. (For example, on a 32-bit machine, an array with
6960 size 2^32 - 1 is too big.) */
6961 else if (TREE_CODE (itype
) == INTEGER_CST
6962 && TREE_OVERFLOW (itype
))
6964 error ("overflow in array dimension");
6965 TREE_OVERFLOW (itype
) = 0;
6969 /* Create and return the appropriate index type. */
6972 tree t
= build_index_type (itype
);
6973 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
6977 return build_index_type (itype
);
6980 /* Returns the scope (if any) in which the entity declared by
6981 DECLARATOR will be located. If the entity was declared with an
6982 unqualified name, NULL_TREE is returned. */
6985 get_scope_of_declarator (const cp_declarator
*declarator
)
6987 while (declarator
&& declarator
->kind
!= cdk_id
)
6988 declarator
= declarator
->declarator
;
6990 /* If the declarator-id is a SCOPE_REF, the scope in which the
6991 declaration occurs is the first operand. */
6993 && declarator
->u
.id
.qualifying_scope
)
6994 return declarator
->u
.id
.qualifying_scope
;
6996 /* Otherwise, the declarator is not a qualified name; the entity will
6997 be declared in the current scope. */
7001 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7002 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7006 create_array_type_for_decl (tree name
, tree type
, tree size
)
7008 tree itype
= NULL_TREE
;
7009 const char* error_msg
;
7011 /* If things have already gone awry, bail now. */
7012 if (type
== error_mark_node
|| size
== error_mark_node
)
7013 return error_mark_node
;
7015 /* Assume that everything will go OK. */
7018 /* There are some types which cannot be array elements. */
7019 switch (TREE_CODE (type
))
7022 error_msg
= "array of void";
7026 error_msg
= "array of functions";
7029 case REFERENCE_TYPE
:
7030 error_msg
= "array of references";
7034 error_msg
= "array of function members";
7041 /* If something went wrong, issue an error-message and return. */
7045 error ("declaration of %qD as %s", name
, error_msg
);
7047 error ("creating %s", error_msg
);
7049 return error_mark_node
;
7054 The constant expressions that specify the bounds of the arrays
7055 can be omitted only for the first member of the sequence. */
7056 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
7059 error ("declaration of %qD as multidimensional array must "
7060 "have bounds for all dimensions except the first",
7063 error ("multidimensional array must have bounds for all "
7064 "dimensions except the first");
7066 return error_mark_node
;
7069 /* Figure out the index type for the array. */
7071 itype
= compute_array_index_type (name
, size
);
7074 T is called the array element type; this type shall not be [...] an
7075 abstract class type. */
7076 abstract_virtuals_error (name
, type
);
7078 return build_cplus_array_type (type
, itype
);
7081 /* Check that it's OK to declare a function with the indicated TYPE.
7082 SFK indicates the kind of special function (if any) that this
7083 function is. OPTYPE is the type given in a conversion operator
7084 declaration, or the class type for a constructor/destructor.
7085 Returns the actual return type of the function; that
7086 may be different than TYPE if an error occurs, or for certain
7087 special functions. */
7090 check_special_function_return_type (special_function_kind sfk
,
7096 case sfk_constructor
:
7098 error ("return type specification for constructor invalid");
7100 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
7101 type
= build_pointer_type (optype
);
7103 type
= void_type_node
;
7106 case sfk_destructor
:
7108 error ("return type specification for destructor invalid");
7109 /* We can't use the proper return type here because we run into
7110 problems with ambiguous bases and covariant returns.
7111 Java classes are left unchanged because (void *) isn't a valid
7112 Java type, and we don't want to change the Java ABI. */
7113 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
7114 type
= build_pointer_type (void_type_node
);
7116 type
= void_type_node
;
7119 case sfk_conversion
:
7121 error ("return type specified for %<operator %T%>", optype
);
7132 /* A variable or data member (whose unqualified name is IDENTIFIER)
7133 has been declared with the indicated TYPE. If the TYPE is not
7134 acceptable, issue an error message and return a type to use for
7135 error-recovery purposes. */
7138 check_var_type (tree identifier
, tree type
)
7140 if (VOID_TYPE_P (type
))
7143 error ("unnamed variable or field declared void");
7144 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
7146 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
7147 error ("variable or field %qE declared void", identifier
);
7150 error ("variable or field declared void");
7151 type
= error_mark_node
;
7157 /* Given declspecs and a declarator (abstract or otherwise), determine
7158 the name and type of the object declared and construct a DECL node
7161 DECLSPECS points to the representation of declaration-specifier
7162 sequence that precedes declarator.
7164 DECL_CONTEXT says which syntactic context this declaration is in:
7165 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7166 FUNCDEF for a function definition. Like NORMAL but a few different
7167 error messages in each case. Return value may be zero meaning
7168 this definition is too screwy to try to parse.
7169 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7170 handle member functions (which have FIELD context).
7171 Return value may be zero meaning this definition is too screwy to
7173 PARM for a parameter declaration (either within a function prototype
7174 or before a function body). Make a PARM_DECL, or return void_type_node.
7175 CATCHPARM for a parameter declaration before a catch clause.
7176 TYPENAME if for a typename (in a cast or sizeof).
7177 Don't make a DECL node; just return the ..._TYPE node.
7178 FIELD for a struct or union field; make a FIELD_DECL.
7179 BITFIELD for a field with specified width.
7180 INITIALIZED is 1 if the decl has an initializer.
7182 ATTRLIST is a pointer to the list of attributes, which may be NULL
7183 if there are none; *ATTRLIST may be modified if attributes from inside
7184 the declarator should be applied to the declaration.
7186 When this function is called, scoping variables (such as
7187 CURRENT_CLASS_TYPE) should reflect the scope in which the
7188 declaration occurs, not the scope in which the new declaration will
7189 be placed. For example, on:
7193 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7196 Returns a DECL (if a declarator is present), a TYPE (if there is no
7197 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7201 grokdeclarator (const cp_declarator
*declarator
,
7202 const cp_decl_specifier_seq
*declspecs
,
7203 enum decl_context decl_context
,
7207 tree type
= NULL_TREE
;
7209 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
7210 int explicit_int
= 0;
7211 int explicit_char
= 0;
7212 int defaulted_int
= 0;
7213 tree dependent_name
= NULL_TREE
;
7215 tree typedef_decl
= NULL_TREE
;
7216 const char *name
= NULL
;
7217 tree typedef_type
= NULL_TREE
;
7218 /* True if this declarator is a function definition. */
7219 bool funcdef_flag
= false;
7220 cp_declarator_kind innermost_code
= cdk_error
;
7223 /* See the code below that used this. */
7224 tree decl_attr
= NULL_TREE
;
7227 /* Keep track of what sort of function is being processed
7228 so that we can warn about default return values, or explicit
7229 return values which do not match prescribed defaults. */
7230 special_function_kind sfk
= sfk_none
;
7232 tree dname
= NULL_TREE
;
7233 tree ctor_return_type
= NULL_TREE
;
7234 enum overload_flags flags
= NO_SPECIAL
;
7235 /* cv-qualifiers that apply to the declarator, for a declaration of
7236 a member function. */
7237 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
7238 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7240 tree raises
= NULL_TREE
;
7241 int template_count
= 0;
7242 tree returned_attrs
= NULL_TREE
;
7243 tree parms
= NULL_TREE
;
7244 const cp_declarator
*id_declarator
;
7245 /* The unqualified name of the declarator; either an
7246 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7247 tree unqualified_id
;
7248 /* The class type, if any, in which this entity is located,
7249 or NULL_TREE if none. Note that this value may be different from
7250 the current class type; for example if an attempt is made to declare
7251 "A::f" inside "B", this value will be "A". */
7252 tree ctype
= current_class_type
;
7253 /* The NAMESPACE_DECL for the namespace in which this entity is
7254 located. If an unqualified name is used to declare the entity,
7255 this value will be NULL_TREE, even if the entity is located at
7257 tree in_namespace
= NULL_TREE
;
7258 cp_storage_class storage_class
;
7259 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
7260 bool type_was_error_mark_node
= false;
7261 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
7262 bool set_no_warning
= false;
7264 signed_p
= declspecs
->specs
[(int)ds_signed
];
7265 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
7266 short_p
= declspecs
->specs
[(int)ds_short
];
7267 long_p
= declspecs
->specs
[(int)ds_long
];
7268 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
7269 thread_p
= declspecs
->specs
[(int)ds_thread
];
7271 if (decl_context
== FUNCDEF
)
7272 funcdef_flag
= true, decl_context
= NORMAL
;
7273 else if (decl_context
== MEMFUNCDEF
)
7274 funcdef_flag
= true, decl_context
= FIELD
;
7275 else if (decl_context
== BITFIELD
)
7276 bitfield
= 1, decl_context
= FIELD
;
7278 /* Look inside a declarator for the name being declared
7279 and get it as a string, for an error message. */
7280 for (id_declarator
= declarator
;
7282 id_declarator
= id_declarator
->declarator
)
7284 if (id_declarator
->kind
!= cdk_id
)
7285 innermost_code
= id_declarator
->kind
;
7287 switch (id_declarator
->kind
)
7290 if (id_declarator
->declarator
7291 && id_declarator
->declarator
->kind
== cdk_id
)
7293 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
7294 if (sfk
== sfk_destructor
)
7301 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
7302 tree decl
= id_declarator
->u
.id
.unqualified_name
;
7305 if (qualifying_scope
)
7307 if (at_function_scope_p ())
7311 A declarator-id shall not be qualified except
7314 None of the cases are permitted in block
7316 if (qualifying_scope
== global_namespace
)
7317 error ("invalid use of qualified-name %<::%D%>",
7319 else if (TYPE_P (qualifying_scope
))
7320 error ("invalid use of qualified-name %<%T::%D%>",
7321 qualifying_scope
, decl
);
7323 error ("invalid use of qualified-name %<%D::%D%>",
7324 qualifying_scope
, decl
);
7325 return error_mark_node
;
7327 else if (TYPE_P (qualifying_scope
))
7329 ctype
= qualifying_scope
;
7330 if (innermost_code
!= cdk_function
7331 && current_class_type
7332 && !UNIQUELY_DERIVED_FROM_P (ctype
,
7333 current_class_type
))
7335 error ("type %qT is not derived from type %qT",
7336 ctype
, current_class_type
);
7337 return error_mark_node
;
7340 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
7341 in_namespace
= qualifying_scope
;
7343 switch (TREE_CODE (decl
))
7349 if (innermost_code
!= cdk_function
)
7351 error ("declaration of %qD as non-function", decl
);
7352 return error_mark_node
;
7354 else if (!qualifying_scope
7355 && !(current_class_type
&& at_class_scope_p ()))
7357 error ("declaration of %qD as non-member", decl
);
7358 return error_mark_node
;
7361 type
= TREE_OPERAND (decl
, 0);
7362 name
= IDENTIFIER_POINTER (constructor_name (type
));
7367 case TEMPLATE_ID_EXPR
:
7369 tree fns
= TREE_OPERAND (decl
, 0);
7372 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
7374 gcc_assert (is_overloaded_fn (dname
));
7375 dname
= DECL_NAME (get_first_fn (dname
));
7380 case IDENTIFIER_NODE
:
7381 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
7384 if (C_IS_RESERVED_WORD (dname
))
7386 error ("declarator-id missing; using reserved word %qD",
7388 name
= IDENTIFIER_POINTER (dname
);
7390 else if (!IDENTIFIER_TYPENAME_P (dname
))
7391 name
= IDENTIFIER_POINTER (dname
);
7394 gcc_assert (flags
== NO_SPECIAL
);
7395 flags
= TYPENAME_FLAG
;
7396 ctor_return_type
= TREE_TYPE (dname
);
7397 sfk
= sfk_conversion
;
7398 if (is_typename_at_global_scope (dname
))
7399 name
= IDENTIFIER_POINTER (dname
);
7401 name
= "<invalid operator>";
7418 return error_mark_node
;
7423 if (id_declarator
->kind
== cdk_id
)
7429 The declarator in a function-definition shall have the form
7430 D1 ( parameter-declaration-clause) ... */
7431 if (funcdef_flag
&& innermost_code
!= cdk_function
)
7433 error ("function definition does not declare parameters");
7434 return error_mark_node
;
7437 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
7438 && innermost_code
!= cdk_function
7439 && ! (ctype
&& !declspecs
->any_specifiers_p
))
7441 error ("declaration of %qD as non-function", dname
);
7442 return error_mark_node
;
7445 /* Anything declared one level down from the top level
7446 must be one of the parameters of a function
7447 (because the body is at least two levels down). */
7449 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7450 by not allowing C++ class definitions to specify their parameters
7451 with xdecls (must be spec.d in the parmlist).
7453 Since we now wait to push a class scope until we are sure that
7454 we are in a legitimate method context, we must set oldcname
7455 explicitly (since current_class_name is not yet alive).
7457 We also want to avoid calling this a PARM if it is in a namespace. */
7459 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
7461 struct cp_binding_level
*b
= current_binding_level
;
7462 current_binding_level
= b
->level_chain
;
7463 if (current_binding_level
!= 0 && toplevel_bindings_p ())
7464 decl_context
= PARM
;
7465 current_binding_level
= b
;
7469 name
= decl_context
== PARM
? "parameter" : "type name";
7471 /* If there were multiple types specified in the decl-specifier-seq,
7472 issue an error message. */
7473 if (declspecs
->multiple_types_p
)
7475 error ("two or more data types in declaration of %qs", name
);
7476 return error_mark_node
;
7479 /* Extract the basic type from the decl-specifier-seq. */
7480 type
= declspecs
->type
;
7481 if (type
== error_mark_node
)
7484 type_was_error_mark_node
= true;
7486 /* If the entire declaration is itself tagged as deprecated then
7487 suppress reports of deprecated items. */
7488 if (type
&& TREE_DEPRECATED (type
)
7489 && deprecated_state
!= DEPRECATED_SUPPRESS
)
7490 warn_deprecated_use (type
);
7491 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
7493 typedef_decl
= type
;
7494 type
= TREE_TYPE (typedef_decl
);
7496 /* No type at all: default to `int', and set DEFAULTED_INT
7497 because it was not a user-defined typedef. */
7498 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
7500 /* These imply 'int'. */
7501 type
= integer_type_node
;
7505 explicit_int
= declspecs
->explicit_int_p
;
7506 explicit_char
= declspecs
->explicit_char_p
;
7509 /* See the code below that used this. */
7511 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
7513 typedef_type
= type
;
7516 if (sfk
!= sfk_conversion
)
7517 ctor_return_type
= ctype
;
7519 if (sfk
!= sfk_none
)
7520 type
= check_special_function_return_type (sfk
, type
,
7522 else if (type
== NULL_TREE
)
7528 /* We handle `main' specially here, because 'main () { }' is so
7529 common. With no options, it is allowed. With -Wreturn-type,
7530 it is a warning. It is only an error with -pedantic-errors. */
7531 is_main
= (funcdef_flag
7532 && dname
&& MAIN_NAME_P (dname
)
7533 && ctype
== NULL_TREE
7534 && in_namespace
== NULL_TREE
7535 && current_namespace
== global_namespace
);
7537 if (type_was_error_mark_node
)
7538 /* We've already issued an error, don't complain more. */;
7539 else if (in_system_header
|| flag_ms_extensions
)
7540 /* Allow it, sigh. */;
7541 else if (pedantic
|| ! is_main
)
7542 pedwarn ("ISO C++ forbids declaration of %qs with no type", name
);
7544 warning (OPT_Wreturn_type
,
7545 "ISO C++ forbids declaration of %qs with no type", name
);
7547 type
= integer_type_node
;
7552 /* Now process the modifiers that were specified
7553 and check for invalid combinations. */
7555 /* Long double is a special combination. */
7556 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
7559 type
= build_qualified_type (long_double_type_node
,
7560 cp_type_quals (type
));
7563 /* Check all other uses of type modifiers. */
7565 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
7569 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
7570 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
7571 else if (signed_p
&& unsigned_p
)
7572 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
7573 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
7574 error ("%<long long%> invalid for %qs", name
);
7575 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
7576 error ("%<long%> invalid for %qs", name
);
7577 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
7578 error ("%<short%> invalid for %qs", name
);
7579 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
7580 error ("%<long%> or %<short%> invalid for %qs", name
);
7581 else if ((long_p
|| short_p
) && explicit_char
)
7582 error ("%<long%> or %<short%> specified with char for %qs", name
);
7583 else if (long_p
&& short_p
)
7584 error ("%<long%> and %<short%> specified together for %qs", name
);
7588 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& pedantic
)
7590 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7592 if (flag_pedantic_errors
)
7597 /* Discard the type modifiers if they are invalid. */
7608 /* Decide whether an integer type is signed or not.
7609 Optionally treat bitfields as signed by default. */
7613 It is implementation-defined whether a plain (neither
7614 explicitly signed or unsigned) char, short, int, or long
7615 bit-field is signed or unsigned.
7617 Naturally, we extend this to long long as well. Note that
7618 this does not include wchar_t. */
7619 || (bitfield
&& !flag_signed_bitfields
7621 /* A typedef for plain `int' without `signed' can be
7622 controlled just like plain `int', but a typedef for
7623 `signed int' cannot be so controlled. */
7625 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
7626 && TREE_CODE (type
) == INTEGER_TYPE
7627 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
7630 type
= long_long_unsigned_type_node
;
7632 type
= long_unsigned_type_node
;
7634 type
= short_unsigned_type_node
;
7635 else if (type
== char_type_node
)
7636 type
= unsigned_char_type_node
;
7637 else if (typedef_decl
)
7638 type
= unsigned_type_for (type
);
7640 type
= unsigned_type_node
;
7642 else if (signed_p
&& type
== char_type_node
)
7643 type
= signed_char_type_node
;
7645 type
= long_long_integer_type_node
;
7647 type
= long_integer_type_node
;
7649 type
= short_integer_type_node
;
7651 if (declspecs
->specs
[(int)ds_complex
])
7653 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
7654 error ("complex invalid for %qs", name
);
7655 /* If we just have "complex", it is equivalent to
7656 "complex double", but if any modifiers at all are specified it is
7657 the complex form of TYPE. E.g, "complex short" is
7658 "complex short int". */
7660 else if (defaulted_int
&& ! longlong
7661 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
7662 type
= complex_double_type_node
;
7663 else if (type
== integer_type_node
)
7664 type
= complex_integer_type_node
;
7665 else if (type
== float_type_node
)
7666 type
= complex_float_type_node
;
7667 else if (type
== double_type_node
)
7668 type
= complex_double_type_node
;
7669 else if (type
== long_double_type_node
)
7670 type
= complex_long_double_type_node
;
7672 type
= build_complex_type (type
);
7675 type_quals
= TYPE_UNQUALIFIED
;
7676 if (declspecs
->specs
[(int)ds_const
])
7677 type_quals
|= TYPE_QUAL_CONST
;
7678 if (declspecs
->specs
[(int)ds_volatile
])
7679 type_quals
|= TYPE_QUAL_VOLATILE
;
7680 if (declspecs
->specs
[(int)ds_restrict
])
7681 type_quals
|= TYPE_QUAL_RESTRICT
;
7682 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
7683 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7686 if (TREE_CODE (type
) == FUNCTION_TYPE
7687 && type_quals
!= TYPE_UNQUALIFIED
)
7689 /* This was an error in C++98 (cv-qualifiers cannot be added to
7690 a function type), but DR 295 makes the code well-formed by
7691 dropping the extra qualifiers. */
7694 tree bad_type
= build_qualified_type (type
, type_quals
);
7695 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7698 type_quals
= TYPE_UNQUALIFIED
;
7700 type_quals
|= cp_type_quals (type
);
7701 type
= cp_build_qualified_type_real
7702 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
7703 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
7704 /* We might have ignored or rejected some of the qualifiers. */
7705 type_quals
= cp_type_quals (type
);
7708 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
7709 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
7710 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
7712 storage_class
= declspecs
->storage_class
;
7713 if (storage_class
== sc_static
)
7714 staticp
= 1 + (decl_context
== FIELD
);
7716 if (virtualp
&& staticp
== 2)
7718 error ("member %qD cannot be declared both virtual and static", dname
);
7719 storage_class
= sc_none
;
7722 friendp
= !! declspecs
->specs
[(int)ds_friend
];
7724 if (dependent_name
&& !friendp
)
7726 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
7727 return error_mark_node
;
7730 /* Issue errors about use of storage classes for parameters. */
7731 if (decl_context
== PARM
)
7733 if (declspecs
->specs
[(int)ds_typedef
])
7735 error ("typedef declaration invalid in parameter declaration");
7736 return error_mark_node
;
7738 else if (storage_class
== sc_static
7739 || storage_class
== sc_extern
7741 error ("storage class specifiers invalid in parameter declarations");
7744 /* Give error if `virtual' is used outside of class declaration. */
7746 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
7748 error ("virtual outside class declaration");
7752 /* Static anonymous unions are dealt with here. */
7753 if (staticp
&& decl_context
== TYPENAME
7755 && ANON_AGGR_TYPE_P (declspecs
->type
))
7756 decl_context
= FIELD
;
7758 /* Warn about storage classes that are invalid for certain
7759 kinds of declarations (parameters, typenames, etc.). */
7762 && storage_class
!= sc_extern
7763 && storage_class
!= sc_static
)
7764 || declspecs
->specs
[(int)ds_typedef
]))
7766 error ("multiple storage classes in declaration of %qs", name
);
7769 if (declspecs
->conflicting_specifiers_p
)
7771 error ("conflicting specifiers in declaration of %qs", name
);
7772 storage_class
= sc_none
;
7774 else if (decl_context
!= NORMAL
7775 && ((storage_class
!= sc_none
7776 && storage_class
!= sc_mutable
)
7779 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
7780 && (storage_class
== sc_register
7781 || storage_class
== sc_auto
))
7783 else if (declspecs
->specs
[(int)ds_typedef
])
7785 else if (decl_context
== FIELD
7786 /* C++ allows static class elements. */
7787 && storage_class
== sc_static
)
7788 /* C++ also allows inlines and signed and unsigned elements,
7789 but in those cases we don't come in here. */
7793 if (decl_context
== FIELD
)
7794 error ("storage class specified for %qs", name
);
7797 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7798 error ("storage class specified for parameter %qs", name
);
7800 error ("storage class specified for typename");
7802 if (storage_class
== sc_register
7803 || storage_class
== sc_auto
7804 || storage_class
== sc_extern
7806 storage_class
= sc_none
;
7809 else if (storage_class
== sc_extern
&& initialized
7812 if (toplevel_bindings_p ())
7814 /* It's common practice (and completely valid) to have a const
7815 be initialized and declared extern. */
7816 if (!(type_quals
& TYPE_QUAL_CONST
))
7817 warning (0, "%qs initialized and declared %<extern%>", name
);
7820 error ("%qs has both %<extern%> and initializer", name
);
7822 else if (storage_class
== sc_extern
&& funcdef_flag
7823 && ! toplevel_bindings_p ())
7824 error ("nested function %qs declared %<extern%>", name
);
7825 else if (toplevel_bindings_p ())
7827 if (storage_class
== sc_auto
)
7828 error ("top-level declaration of %qs specifies %<auto%>", name
);
7831 && storage_class
!= sc_extern
7832 && storage_class
!= sc_static
)
7834 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7839 if (storage_class
&& friendp
)
7840 error ("storage class specifiers invalid in friend function declarations");
7843 unqualified_id
= NULL_TREE
;
7846 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
7847 switch (TREE_CODE (unqualified_id
))
7851 = constructor_name (TREE_OPERAND (unqualified_id
, 0));
7854 case IDENTIFIER_NODE
:
7855 case TEMPLATE_ID_EXPR
:
7863 /* Determine the type of the entity declared by recurring on the
7865 for (; declarator
; declarator
= declarator
->declarator
)
7867 const cp_declarator
*inner_declarator
;
7870 if (type
== error_mark_node
)
7871 return error_mark_node
;
7873 attrs
= declarator
->attributes
;
7879 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
7880 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
7881 if (declarator
->kind
== cdk_function
)
7882 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
7883 if (declarator
->kind
== cdk_array
)
7884 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
7885 returned_attrs
= decl_attributes (&type
,
7886 chainon (returned_attrs
, attrs
),
7890 if (declarator
->kind
== cdk_id
)
7893 inner_declarator
= declarator
->declarator
;
7895 switch (declarator
->kind
)
7898 type
= create_array_type_for_decl (dname
, type
,
7899 declarator
->u
.array
.bounds
);
7907 /* Declaring a function type.
7908 Make sure we have a valid type for the function to return. */
7910 if (type_quals
!= TYPE_UNQUALIFIED
)
7912 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
7913 warning (OPT_Wreturn_type
,
7914 "type qualifiers ignored on function return type");
7915 /* We now know that the TYPE_QUALS don't apply to the
7916 decl, but to its return type. */
7917 type_quals
= TYPE_UNQUALIFIED
;
7918 set_no_warning
= true;
7921 /* Warn about some types functions can't return. */
7923 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7925 error ("%qs declared as function returning a function", name
);
7926 type
= integer_type_node
;
7928 if (TREE_CODE (type
) == ARRAY_TYPE
)
7930 error ("%qs declared as function returning an array", name
);
7931 type
= integer_type_node
;
7934 /* Pick up type qualifiers which should be applied to `this'. */
7935 memfn_quals
= declarator
->u
.function
.qualifiers
;
7937 /* Pick up the exception specifications. */
7938 raises
= declarator
->u
.function
.exception_specification
;
7940 /* Say it's a definition only for the CALL_EXPR
7941 closest to the identifier. */
7942 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
7944 if (ctype
== NULL_TREE
7945 && decl_context
== FIELD
7947 && (friendp
== 0 || dname
== current_class_name
))
7948 ctype
= current_class_type
;
7950 if (ctype
&& (sfk
== sfk_constructor
7951 || sfk
== sfk_destructor
))
7953 /* We are within a class's scope. If our declarator name
7954 is the same as the class name, and we are defining
7955 a function, then it is a constructor/destructor, and
7956 therefore returns a void type. */
7958 /* ISO C++ 12.4/2. A destructor may not be declared
7959 const or volatile. A destructor may not be
7962 ISO C++ 12.1. A constructor may not be declared
7963 const or volatile. A constructor may not be
7964 virtual. A constructor may not be static. */
7966 error ((flags
== DTOR_FLAG
)
7967 ? "destructor cannot be static member function"
7968 : "constructor cannot be static member function");
7971 error ((flags
== DTOR_FLAG
)
7972 ? "destructors may not be cv-qualified"
7973 : "constructors may not be cv-qualified");
7974 memfn_quals
= TYPE_UNQUALIFIED
;
7977 if (decl_context
== FIELD
7978 && !member_function_or_else (ctype
,
7981 return error_mark_node
;
7983 if (flags
!= DTOR_FLAG
)
7985 /* It's a constructor. */
7990 pedwarn ("constructors cannot be declared virtual");
7993 if (decl_context
== FIELD
7994 && sfk
!= sfk_constructor
)
7995 return error_mark_node
;
7997 if (decl_context
== FIELD
)
8003 error ("can't initialize friend function %qs", name
);
8006 /* Cannot be both friend and virtual. */
8007 error ("virtual functions cannot be friends");
8010 if (decl_context
== NORMAL
)
8011 error ("friend declaration not in class definition");
8012 if (current_function_decl
&& funcdef_flag
)
8013 error ("can't define friend function %qs in a local "
8018 arg_types
= grokparms (declarator
->u
.function
.parameters
,
8021 if (inner_declarator
8022 && inner_declarator
->kind
== cdk_id
8023 && inner_declarator
->u
.id
.sfk
== sfk_destructor
8024 && arg_types
!= void_list_node
)
8026 error ("destructors may not have parameters");
8027 arg_types
= void_list_node
;
8031 type
= build_function_type (type
, arg_types
);
8038 /* Filter out pointers-to-references and references-to-references.
8039 We can get these if a TYPE_DECL is used. */
8041 if (TREE_CODE (type
) == REFERENCE_TYPE
)
8043 if (declarator
->kind
!= cdk_reference
)
8045 error ("cannot declare pointer to %q#T", type
);
8046 type
= TREE_TYPE (type
);
8049 /* In C++0x, we allow reference to reference declarations
8050 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8051 and template type arguments [14.3.1/4 temp.arg.type]. The
8052 check for direct reference to reference declarations, which
8053 are still forbidden, occurs below. Reasoning behind the change
8054 can be found in DR106, DR540, and the rvalue reference
8056 else if (cxx_dialect
== cxx98
)
8058 error ("cannot declare reference to %q#T", type
);
8059 type
= TREE_TYPE (type
);
8062 else if (VOID_TYPE_P (type
))
8064 if (declarator
->kind
== cdk_reference
)
8065 error ("cannot declare reference to %q#T", type
);
8066 else if (declarator
->kind
== cdk_ptrmem
)
8067 error ("cannot declare pointer to %q#T member", type
);
8070 /* We now know that the TYPE_QUALS don't apply to the decl,
8071 but to the target of the pointer. */
8072 type_quals
= TYPE_UNQUALIFIED
;
8074 if (declarator
->kind
== cdk_ptrmem
8075 && (TREE_CODE (type
) == FUNCTION_TYPE
|| memfn_quals
))
8077 memfn_quals
|= cp_type_quals (type
);
8078 type
= build_memfn_type (type
,
8079 declarator
->u
.pointer
.class_type
,
8081 memfn_quals
= TYPE_UNQUALIFIED
;
8084 if (declarator
->kind
== cdk_reference
)
8086 /* In C++0x, the type we are creating a reference to might be
8087 a typedef which is itself a reference type. In that case,
8088 we follow the reference collapsing rules in
8089 [7.1.3/8 dcl.typedef] to create the final reference type:
8091 "If a typedef TD names a type that is a reference to a type
8092 T, an attempt to create the type 'lvalue reference to cv TD'
8093 creates the type 'lvalue reference to T,' while an attempt
8094 to create the type "rvalue reference to cv TD' creates the
8097 if (!VOID_TYPE_P (type
))
8098 type
= cp_build_reference_type
8099 ((TREE_CODE (type
) == REFERENCE_TYPE
8100 ? TREE_TYPE (type
) : type
),
8101 (declarator
->u
.reference
.rvalue_ref
8102 && (TREE_CODE(type
) != REFERENCE_TYPE
8103 || TYPE_REF_IS_RVALUE (type
))));
8105 /* In C++0x, we need this check for direct reference to
8106 reference declarations, which are forbidden by
8107 [8.3.2/5 dcl.ref]. Reference to reference declarations
8108 are only allowed indirectly through typedefs and template
8109 type arguments. Example:
8111 void foo(int & &); // invalid ref-to-ref decl
8113 typedef int & int_ref;
8114 void foo(int_ref &); // valid ref-to-ref decl
8116 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
8117 error ("cannot declare reference to %q#T, which is not "
8118 "a typedef or a template type argument", type
);
8120 else if (TREE_CODE (type
) == METHOD_TYPE
)
8121 type
= build_ptrmemfunc_type (build_pointer_type (type
));
8122 else if (declarator
->kind
== cdk_ptrmem
)
8124 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
8126 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
8127 /* We will already have complained. */
8128 type
= error_mark_node
;
8130 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
8134 type
= build_pointer_type (type
);
8136 /* Process a list of type modifier keywords (such as
8137 const or volatile) that were given inside the `*' or `&'. */
8139 if (declarator
->u
.pointer
.qualifiers
)
8142 = cp_build_qualified_type (type
,
8143 declarator
->u
.pointer
.qualifiers
);
8144 type_quals
= cp_type_quals (type
);
8157 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
8158 && TREE_CODE (type
) != FUNCTION_TYPE
8159 && TREE_CODE (type
) != METHOD_TYPE
)
8161 error ("template-id %qD used as a declarator",
8163 unqualified_id
= dname
;
8166 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8167 qualified with a class-name, turn it into a METHOD_TYPE, unless
8168 we know that the function is static. We take advantage of this
8169 opportunity to do other processing that pertains to entities
8170 explicitly declared to be class members. Note that if DECLARATOR
8171 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8172 would not have exited the loop above. */
8174 && declarator
->u
.id
.qualifying_scope
8175 && TYPE_P (declarator
->u
.id
.qualifying_scope
))
8179 ctype
= declarator
->u
.id
.qualifying_scope
;
8180 ctype
= TYPE_MAIN_VARIANT (ctype
);
8182 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
8184 /* You're supposed to have one `template <...>' for every
8185 template class, but you don't need one for a full
8186 specialization. For example:
8188 template <class T> struct S{};
8189 template <> struct S<int> { void f(); };
8190 void S<int>::f () {}
8192 is correct; there shouldn't be a `template <>' for the
8193 definition of `S<int>::f'. */
8194 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
8195 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
8196 /* T is an explicit (not partial) specialization. All
8197 containing classes must therefore also be explicitly
8200 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
8201 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
8202 template_count
+= 1;
8204 t
= TYPE_MAIN_DECL (t
);
8205 t
= DECL_CONTEXT (t
);
8208 if (ctype
== current_class_type
)
8212 pedwarn ("member functions are implicitly friends of their class");
8216 pedwarn ("extra qualification %<%T::%> on member %qs",
8219 else if (/* If the qualifying type is already complete, then we
8220 can skip the following checks. */
8221 !COMPLETE_TYPE_P (ctype
)
8222 && (/* If the function is being defined, then
8223 qualifying type must certainly be complete. */
8225 /* A friend declaration of "T::f" is OK, even if
8226 "T" is a template parameter. But, if this
8227 function is not a friend, the qualifying type
8229 || (!friendp
&& !CLASS_TYPE_P (ctype
))
8230 /* For a declaration, the type need not be
8231 complete, if either it is dependent (since there
8232 is no meaningful definition of complete in that
8233 case) or the qualifying class is currently being
8235 || !(dependent_type_p (ctype
)
8236 || currently_open_class (ctype
)))
8237 /* Check that the qualifying type is complete. */
8238 && !complete_type_or_else (ctype
, NULL_TREE
))
8239 return error_mark_node
;
8240 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
8242 tree sname
= declarator
->u
.id
.unqualified_name
;
8244 if (current_class_type
8245 && (!friendp
|| funcdef_flag
))
8248 ? "cannot define member function %<%T::%s%> within %<%T%>"
8249 : "cannot declare member function %<%T::%s%> within %<%T%>",
8250 ctype
, name
, current_class_type
);
8251 return error_mark_node
;
8254 if (TREE_CODE (sname
) == IDENTIFIER_NODE
8255 && NEW_DELETE_OPNAME_P (sname
))
8256 /* Overloaded operator new and operator delete
8257 are always static functions. */
8260 type
= build_memfn_type (type
, ctype
, memfn_quals
);
8262 else if (declspecs
->specs
[(int)ds_typedef
]
8263 && current_class_type
)
8265 error ("cannot declare member %<%T::%s%> within %qT",
8266 ctype
, name
, current_class_type
);
8267 return error_mark_node
;
8271 /* Now TYPE has the actual type. */
8276 *attrlist
= chainon (returned_attrs
, *attrlist
);
8278 attrlist
= &returned_attrs
;
8281 /* Handle parameter packs. */
8282 if (parameter_pack_p
)
8284 if (decl_context
== PARM
)
8285 /* Turn the type into a pack expansion.*/
8286 type
= make_pack_expansion (type
);
8288 error ("non-parameter %qs cannot be a parameter pack", name
);
8291 /* Did array size calculations overflow? */
8293 if (TREE_CODE (type
) == ARRAY_TYPE
8294 && COMPLETE_TYPE_P (type
)
8295 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
8296 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
8298 error ("size of array %qs is too large", name
);
8299 /* If we proceed with the array type as it is, we'll eventually
8300 crash in tree_low_cst(). */
8301 type
= error_mark_node
;
8304 if ((decl_context
== FIELD
|| decl_context
== PARM
)
8305 && !processing_template_decl
8306 && variably_modified_type_p (type
, NULL_TREE
))
8308 if (decl_context
== FIELD
)
8309 error ("data member may not have variably modified type %qT", type
);
8311 error ("parameter may not have variably modified type %qT", type
);
8312 type
= error_mark_node
;
8315 if (explicitp
== 1 || (explicitp
&& friendp
))
8317 /* [dcl.fct.spec] The explicit specifier shall only be used in
8318 declarations of constructors within a class definition. */
8319 error ("only declarations of constructors can be %<explicit%>");
8323 if (storage_class
== sc_mutable
)
8325 if (decl_context
!= FIELD
|| friendp
)
8327 error ("non-member %qs cannot be declared %<mutable%>", name
);
8328 storage_class
= sc_none
;
8330 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
8332 error ("non-object member %qs cannot be declared %<mutable%>", name
);
8333 storage_class
= sc_none
;
8335 else if (TREE_CODE (type
) == FUNCTION_TYPE
8336 || TREE_CODE (type
) == METHOD_TYPE
)
8338 error ("function %qs cannot be declared %<mutable%>", name
);
8339 storage_class
= sc_none
;
8343 error ("static %qs cannot be declared %<mutable%>", name
);
8344 storage_class
= sc_none
;
8346 else if (type_quals
& TYPE_QUAL_CONST
)
8348 error ("const %qs cannot be declared %<mutable%>", name
);
8349 storage_class
= sc_none
;
8353 /* If this is declaring a typedef name, return a TYPE_DECL. */
8354 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
8358 /* Note that the grammar rejects storage classes
8359 in typenames, fields or parameters. */
8360 if (current_lang_name
== lang_name_java
)
8361 TYPE_FOR_JAVA (type
) = 1;
8363 /* This declaration:
8365 typedef void f(int) const;
8367 declares a function type which is not a member of any
8368 particular class, but which is cv-qualified; for
8369 example "f S::*" declares a pointer to a const-qualified
8370 member function of S. We record the cv-qualification in the
8372 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
8374 type
= cp_build_qualified_type (type
, memfn_quals
);
8376 /* We have now dealt with these qualifiers. */
8377 memfn_quals
= TYPE_UNQUALIFIED
;
8380 if (decl_context
== FIELD
)
8381 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
8383 decl
= build_decl (TYPE_DECL
, unqualified_id
, type
);
8384 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
)
8385 error ("%Jtypedef name may not be a nested-name-specifier", decl
);
8387 if (decl_context
!= FIELD
)
8389 if (!current_function_decl
)
8390 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
8391 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
8392 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8393 (current_function_decl
)))
8394 /* The TYPE_DECL is "abstract" because there will be
8395 clones of this constructor/destructor, and there will
8396 be copies of this TYPE_DECL generated in those
8398 DECL_ABSTRACT (decl
) = 1;
8400 else if (constructor_name_p (unqualified_id
, current_class_type
))
8401 pedwarn ("ISO C++ forbids nested type %qD with same name "
8402 "as enclosing class",
8405 /* If the user declares "typedef struct {...} foo" then the
8406 struct will have an anonymous name. Fill that name in now.
8407 Nothing can refer to it, so nothing needs know about the name
8409 if (type
!= error_mark_node
8412 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
8413 && TYPE_ANONYMOUS_P (type
)
8414 /* Don't do this if there are attributes. */
8415 && (!attrlist
|| !*attrlist
)
8416 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
8418 tree oldname
= TYPE_NAME (type
);
8421 /* Replace the anonymous name with the real name everywhere. */
8422 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
8423 if (TYPE_NAME (t
) == oldname
)
8424 TYPE_NAME (t
) = decl
;
8426 if (TYPE_LANG_SPECIFIC (type
))
8427 TYPE_WAS_ANONYMOUS (type
) = 1;
8429 /* If this is a typedef within a template class, the nested
8430 type is a (non-primary) template. The name for the
8431 template needs updating as well. */
8432 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
8433 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
8434 = TYPE_IDENTIFIER (type
);
8436 /* FIXME remangle member functions; member functions of a
8437 type with external linkage have external linkage. */
8441 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
8442 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
8444 bad_specifiers (decl
, "type", virtualp
,
8445 memfn_quals
!= TYPE_UNQUALIFIED
,
8446 inlinep
, friendp
, raises
!= NULL_TREE
);
8451 /* Detect the case of an array type of unspecified size
8452 which came, as such, direct from a typedef name.
8453 We must copy the type, so that the array's domain can be
8454 individually set by the object's initializer. */
8456 if (type
&& typedef_type
8457 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
8458 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
8459 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
8461 /* Detect where we're using a typedef of function type to declare a
8462 function. PARMS will not be set, so we must create it now. */
8464 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
8466 tree decls
= NULL_TREE
;
8469 for (args
= TYPE_ARG_TYPES (type
); args
; args
= TREE_CHAIN (args
))
8471 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
8473 TREE_CHAIN (decl
) = decls
;
8477 parms
= nreverse (decls
);
8479 if (decl_context
!= TYPENAME
)
8481 /* A cv-qualifier-seq shall only be part of the function type
8482 for a non-static member function. [8.3.5/4 dcl.fct] */
8483 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
8484 && (current_class_type
== NULL_TREE
|| staticp
) )
8487 ? G_("qualified function types cannot be used to "
8488 "declare static member functions")
8489 : G_("qualified function types cannot be used to "
8490 "declare free functions"));
8491 type
= TYPE_MAIN_VARIANT (type
);
8494 /* The qualifiers on the function type become the qualifiers on
8495 the non-static member function. */
8496 memfn_quals
|= cp_type_quals (type
);
8500 /* If this is a type name (such as, in a cast or sizeof),
8501 compute the type and return it now. */
8503 if (decl_context
== TYPENAME
)
8505 /* Note that the grammar rejects storage classes
8506 in typenames, fields or parameters. */
8507 if (type_quals
!= TYPE_UNQUALIFIED
)
8508 type_quals
= TYPE_UNQUALIFIED
;
8510 /* Special case: "friend class foo" looks like a TYPENAME context. */
8513 if (type_quals
!= TYPE_UNQUALIFIED
)
8515 error ("type qualifiers specified for friend class declaration");
8516 type_quals
= TYPE_UNQUALIFIED
;
8520 error ("%<inline%> specified for friend class declaration");
8526 /* Don't allow friend declaration without a class-key. */
8527 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
8528 pedwarn ("template parameters cannot be friends");
8529 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
8530 pedwarn ("friend declaration requires class-key, "
8531 "i.e. %<friend class %T::%D%>",
8532 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
8534 pedwarn ("friend declaration requires class-key, "
8535 "i.e. %<friend %#T%>",
8539 /* Only try to do this stuff if we didn't already give up. */
8540 if (type
!= integer_type_node
)
8542 /* A friendly class? */
8543 if (current_class_type
)
8544 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
8547 error ("trying to make class %qT a friend of global scope",
8550 type
= void_type_node
;
8553 else if (memfn_quals
)
8555 if (ctype
== NULL_TREE
)
8557 if (TREE_CODE (type
) != METHOD_TYPE
)
8558 error ("invalid qualifiers on non-member function type");
8560 ctype
= TYPE_METHOD_BASETYPE (type
);
8563 type
= build_memfn_type (type
, ctype
, memfn_quals
);
8568 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
8569 && decl_context
!= CATCHPARM
8570 && TREE_CODE (type
) != UNION_TYPE
8573 error ("abstract declarator %qT used as declaration", type
);
8574 return error_mark_node
;
8577 /* Only functions may be declared using an operator-function-id. */
8579 && IDENTIFIER_OPNAME_P (unqualified_id
)
8580 && TREE_CODE (type
) != FUNCTION_TYPE
8581 && TREE_CODE (type
) != METHOD_TYPE
)
8583 error ("declaration of %qD as non-function", unqualified_id
);
8584 return error_mark_node
;
8587 /* We don't check parameter types here because we can emit a better
8588 error message later. */
8589 if (decl_context
!= PARM
)
8591 type
= check_var_type (unqualified_id
, type
);
8592 if (type
== error_mark_node
)
8593 return error_mark_node
;
8596 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8597 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8599 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8601 if (ctype
|| in_namespace
)
8602 error ("cannot use %<::%> in parameter declaration");
8604 /* A parameter declared as an array of T is really a pointer to T.
8605 One declared as a function is really a pointer to a function.
8606 One declared as a member is really a pointer to member. */
8608 if (TREE_CODE (type
) == ARRAY_TYPE
)
8610 /* Transfer const-ness of array into that of type pointed to. */
8611 type
= build_pointer_type (TREE_TYPE (type
));
8612 type_quals
= TYPE_UNQUALIFIED
;
8614 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
8615 type
= build_pointer_type (type
);
8621 if (decl_context
== PARM
)
8623 decl
= cp_build_parm_decl (unqualified_id
, type
);
8625 bad_specifiers (decl
, "parameter", virtualp
,
8626 memfn_quals
!= TYPE_UNQUALIFIED
,
8627 inlinep
, friendp
, raises
!= NULL_TREE
);
8629 else if (decl_context
== FIELD
)
8631 /* The C99 flexible array extension. */
8632 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
8633 && TYPE_DOMAIN (type
) == NULL_TREE
)
8635 tree itype
= compute_array_index_type (dname
, integer_zero_node
);
8636 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
8639 if (type
== error_mark_node
)
8641 /* Happens when declaring arrays of sizes which
8642 are error_mark_node, for example. */
8645 else if (in_namespace
&& !friendp
)
8647 /* Something like struct S { int N::j; }; */
8648 error ("invalid use of %<::%>");
8649 return error_mark_node
;
8651 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
8654 tree function_context
;
8658 if (ctype
== NULL_TREE
)
8659 ctype
= current_class_type
;
8661 if (ctype
== NULL_TREE
)
8663 error ("can't make %qD into a method -- not in a class",
8665 return error_mark_node
;
8668 /* ``A union may [ ... ] not [ have ] virtual functions.''
8670 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
8672 error ("function %qD declared virtual inside a union",
8674 return error_mark_node
;
8677 if (NEW_DELETE_OPNAME_P (unqualified_id
))
8681 error ("%qD cannot be declared virtual, since it "
8687 else if (staticp
< 2)
8688 type
= build_memfn_type (type
, ctype
, memfn_quals
);
8691 /* Check that the name used for a destructor makes sense. */
8692 if (sfk
== sfk_destructor
)
8696 gcc_assert (friendp
);
8697 error ("expected qualified name in friend declaration "
8698 "for destructor %qD",
8699 id_declarator
->u
.id
.unqualified_name
);
8700 return error_mark_node
;
8703 if (!same_type_p (TREE_OPERAND
8704 (id_declarator
->u
.id
.unqualified_name
, 0),
8707 error ("declaration of %qD as member of %qT",
8708 id_declarator
->u
.id
.unqualified_name
, ctype
);
8709 return error_mark_node
;
8713 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8714 function_context
= (ctype
!= NULL_TREE
) ?
8715 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
8716 publicp
= (! friendp
|| ! staticp
)
8717 && function_context
== NULL_TREE
;
8718 decl
= grokfndecl (ctype
, type
,
8719 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
8720 ? unqualified_id
: dname
,
8723 virtualp
, flags
, memfn_quals
, raises
,
8724 friendp
? -1 : 0, friendp
, publicp
, inlinep
,
8726 funcdef_flag
, template_count
, in_namespace
, attrlist
);
8727 if (decl
== NULL_TREE
)
8728 return error_mark_node
;
8730 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8731 /* The decl and setting of decl_attr is also turned off. */
8732 decl
= build_decl_attribute_variant (decl
, decl_attr
);
8735 /* [class.conv.ctor]
8737 A constructor declared without the function-specifier
8738 explicit that can be called with a single parameter
8739 specifies a conversion from the type of its first
8740 parameter to the type of its class. Such a constructor
8741 is called a converting constructor. */
8743 DECL_NONCONVERTING_P (decl
) = 1;
8744 else if (DECL_CONSTRUCTOR_P (decl
))
8746 /* The constructor can be called with exactly one
8747 parameter if there is at least one parameter, and
8748 any subsequent parameters have default arguments.
8749 Ignore any compiler-added parms. */
8750 tree arg_types
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
8752 if (arg_types
== void_list_node
8754 && TREE_CHAIN (arg_types
)
8755 && TREE_CHAIN (arg_types
) != void_list_node
8756 && !TREE_PURPOSE (TREE_CHAIN (arg_types
))))
8757 DECL_NONCONVERTING_P (decl
) = 1;
8760 else if (TREE_CODE (type
) == METHOD_TYPE
)
8762 /* We only get here for friend declarations of
8763 members of other classes. */
8764 /* All method decls are public, so tell grokfndecl to set
8765 TREE_PUBLIC, also. */
8766 decl
= grokfndecl (ctype
, type
,
8767 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
8768 ? unqualified_id
: dname
,
8771 virtualp
, flags
, memfn_quals
, raises
,
8772 friendp
? -1 : 0, friendp
, 1, 0, sfk
,
8773 funcdef_flag
, template_count
, in_namespace
,
8775 if (decl
== NULL_TREE
)
8776 return error_mark_node
;
8778 else if (!staticp
&& !dependent_type_p (type
)
8779 && !COMPLETE_TYPE_P (complete_type (type
))
8780 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
8783 error ("field %qD has incomplete type", unqualified_id
);
8785 error ("name %qT has incomplete type", type
);
8787 /* If we're instantiating a template, tell them which
8788 instantiation made the field's type be incomplete. */
8789 if (current_class_type
8790 && TYPE_NAME (current_class_type
)
8791 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type
))
8793 && declspecs
->type
== type
)
8794 error (" in instantiation of template %qT",
8795 current_class_type
);
8797 return error_mark_node
;
8803 error ("%qE is neither function nor member function; "
8804 "cannot be declared friend", unqualified_id
);
8812 /* Friends are treated specially. */
8813 if (ctype
== current_class_type
)
8814 ; /* We already issued a pedwarn. */
8815 else if (decl
&& DECL_NAME (decl
))
8817 if (template_class_depth (current_class_type
) == 0)
8819 decl
= check_explicit_specialization
8820 (unqualified_id
, decl
, template_count
,
8821 2 * funcdef_flag
+ 4);
8822 if (decl
== error_mark_node
)
8823 return error_mark_node
;
8826 decl
= do_friend (ctype
, unqualified_id
, decl
,
8832 return error_mark_node
;
8835 /* Structure field. It may not be a function, except for C++. */
8837 if (decl
== NULL_TREE
)
8843 /* An attempt is being made to initialize a non-static
8844 member. But, from [class.mem]:
8846 4 A member-declarator can contain a
8847 constant-initializer only if it declares a static
8848 member (_class.static_) of integral or enumeration
8849 type, see _class.static.data_.
8851 This used to be relatively common practice, but
8852 the rest of the compiler does not correctly
8853 handle the initialization unless the member is
8854 static so we make it static below. */
8855 pedwarn ("ISO C++ forbids initialization of member %qD",
8857 pedwarn ("making %qD static", unqualified_id
);
8861 if (uses_template_parms (type
))
8862 /* We'll check at instantiation time. */
8864 else if (check_static_variable_definition (unqualified_id
,
8866 /* If we just return the declaration, crashes
8867 will sometimes occur. We therefore return
8868 void_type_node, as if this was a friend
8869 declaration, to cause callers to completely
8870 ignore this declaration. */
8871 return error_mark_node
;
8876 /* C++ allows static class members. All other work
8877 for this is done by grokfield. */
8878 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
8879 set_linkage_for_static_data_member (decl
);
8880 /* Even if there is an in-class initialization, DECL
8881 is considered undefined until an out-of-class
8882 definition is provided. */
8883 DECL_EXTERNAL (decl
) = 1;
8886 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
8890 decl
= build_decl (FIELD_DECL
, unqualified_id
, type
);
8891 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
8892 if (bitfield
&& !unqualified_id
)
8893 TREE_NO_WARNING (decl
) = 1;
8895 if (storage_class
== sc_mutable
)
8897 DECL_MUTABLE_P (decl
) = 1;
8898 storage_class
= sc_none
;
8902 bad_specifiers (decl
, "field", virtualp
,
8903 memfn_quals
!= TYPE_UNQUALIFIED
,
8904 inlinep
, friendp
, raises
!= NULL_TREE
);
8907 else if (TREE_CODE (type
) == FUNCTION_TYPE
8908 || TREE_CODE (type
) == METHOD_TYPE
)
8913 if (!unqualified_id
)
8914 return error_mark_node
;
8916 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
8917 original_name
= dname
;
8919 original_name
= unqualified_id
;
8921 if (storage_class
== sc_auto
)
8922 error ("storage class %<auto%> invalid for function %qs", name
);
8923 else if (storage_class
== sc_register
)
8924 error ("storage class %<register%> invalid for function %qs", name
);
8926 error ("storage class %<__thread%> invalid for function %qs", name
);
8928 /* Function declaration not at top level.
8929 Storage classes other than `extern' are not allowed
8930 and `extern' makes no difference. */
8931 if (! toplevel_bindings_p ()
8932 && (storage_class
== sc_static
8933 || declspecs
->specs
[(int)ds_inline
])
8936 if (storage_class
== sc_static
)
8937 pedwarn ("%<static%> specified invalid for function %qs "
8938 "declared out of global scope", name
);
8940 pedwarn ("%<inline%> specifier invalid for function %qs "
8941 "declared out of global scope", name
);
8944 if (ctype
== NULL_TREE
)
8948 error ("virtual non-class function %qs", name
);
8952 else if (TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
8953 && !NEW_DELETE_OPNAME_P (original_name
))
8954 type
= build_method_type_directly (ctype
,
8956 TYPE_ARG_TYPES (type
));
8958 /* Record presence of `static'. */
8959 publicp
= (ctype
!= NULL_TREE
8960 || storage_class
== sc_extern
8961 || storage_class
!= sc_static
);
8963 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
8964 virtualp
, flags
, memfn_quals
, raises
,
8966 publicp
, inlinep
, sfk
, funcdef_flag
,
8967 template_count
, in_namespace
, attrlist
);
8968 if (decl
== NULL_TREE
)
8969 return error_mark_node
;
8973 int invalid_static
= 0;
8975 /* Don't allow a static member function in a class, and forbid
8976 declaring main to be static. */
8977 if (TREE_CODE (type
) == METHOD_TYPE
)
8979 pedwarn ("cannot declare member function %qD to have "
8980 "static linkage", decl
);
8983 else if (current_function_decl
)
8985 /* FIXME need arm citation */
8986 error ("cannot declare static function inside another function");
8993 storage_class
= sc_none
;
8999 /* It's a variable. */
9001 /* An uninitialized decl with `extern' is a reference. */
9002 decl
= grokvardecl (type
, unqualified_id
,
9005 (type_quals
& TYPE_QUAL_CONST
) != 0,
9006 ctype
? ctype
: in_namespace
);
9007 bad_specifiers (decl
, "variable", virtualp
,
9008 memfn_quals
!= TYPE_UNQUALIFIED
,
9009 inlinep
, friendp
, raises
!= NULL_TREE
);
9013 DECL_CONTEXT (decl
) = ctype
;
9016 pedwarn ("%<static%> may not be used when defining "
9017 "(as opposed to declaring) a static data member");
9019 storage_class
= sc_none
;
9021 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
9023 error ("static member %qD declared %<register%>", decl
);
9024 storage_class
= sc_none
;
9026 if (storage_class
== sc_extern
&& pedantic
)
9028 pedwarn ("cannot explicitly declare member %q#D to have "
9031 storage_class
= sc_none
;
9036 /* Record `register' declaration for warnings on &
9037 and in case doing stupid register allocation. */
9039 if (storage_class
== sc_register
)
9040 DECL_REGISTER (decl
) = 1;
9041 else if (storage_class
== sc_extern
)
9042 DECL_THIS_EXTERN (decl
) = 1;
9043 else if (storage_class
== sc_static
)
9044 DECL_THIS_STATIC (decl
) = 1;
9046 /* Record constancy and volatility. There's no need to do this
9047 when processing a template; we'll do this for the instantiated
9048 declaration based on the type of DECL. */
9049 if (!processing_template_decl
)
9050 cp_apply_type_quals_to_decl (type_quals
, decl
);
9053 TREE_NO_WARNING (decl
) = 1;
9059 /* Subroutine of start_function. Ensure that each of the parameter
9060 types (as listed in PARMS) is complete, as is required for a
9061 function definition. */
9064 require_complete_types_for_parms (tree parms
)
9066 for (; parms
; parms
= TREE_CHAIN (parms
))
9068 if (dependent_type_p (TREE_TYPE (parms
)))
9070 if (!VOID_TYPE_P (TREE_TYPE (parms
))
9071 && complete_type_or_else (TREE_TYPE (parms
), parms
))
9073 relayout_decl (parms
);
9074 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
9077 /* grokparms or complete_type_or_else will have already issued
9079 TREE_TYPE (parms
) = error_mark_node
;
9083 /* Returns nonzero if T is a local variable. */
9086 local_variable_p (const_tree t
)
9088 if ((TREE_CODE (t
) == VAR_DECL
9089 /* A VAR_DECL with a context that is a _TYPE is a static data
9091 && !TYPE_P (CP_DECL_CONTEXT (t
))
9092 /* Any other non-local variable must be at namespace scope. */
9093 && !DECL_NAMESPACE_SCOPE_P (t
))
9094 || (TREE_CODE (t
) == PARM_DECL
))
9100 /* Like local_variable_p, but suitable for use as a tree-walking
9104 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
9105 void *data ATTRIBUTE_UNUSED
)
9107 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
9109 else if (TYPE_P (*tp
))
9116 /* Check that ARG, which is a default-argument expression for a
9117 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9118 something goes wrong. DECL may also be a _TYPE node, rather than a
9119 DECL, if there is no DECL available. */
9122 check_default_argument (tree decl
, tree arg
)
9127 if (TREE_CODE (arg
) == DEFAULT_ARG
)
9128 /* We get a DEFAULT_ARG when looking at an in-class declaration
9129 with a default argument. Ignore the argument for now; we'll
9130 deal with it after the class is complete. */
9139 decl_type
= TREE_TYPE (decl
);
9141 if (arg
== error_mark_node
9142 || decl
== error_mark_node
9143 || TREE_TYPE (arg
) == error_mark_node
9144 || decl_type
== error_mark_node
)
9145 /* Something already went wrong. There's no need to check
9147 return error_mark_node
;
9149 /* [dcl.fct.default]
9151 A default argument expression is implicitly converted to the
9153 if (!TREE_TYPE (arg
)
9154 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
9157 error ("default argument for %q#D has type %qT",
9158 decl
, TREE_TYPE (arg
));
9160 error ("default argument for parameter of type %qT has type %qT",
9161 decl_type
, TREE_TYPE (arg
));
9163 return error_mark_node
;
9166 /* [dcl.fct.default]
9168 Local variables shall not be used in default argument
9171 The keyword `this' shall not be used in a default argument of a
9173 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
9176 error ("default argument %qE uses local variable %qD", arg
, var
);
9177 return error_mark_node
;
9184 /* Decode the list of parameter types for a function type.
9185 Given the list of things declared inside the parens,
9186 return a list of types.
9188 If this parameter does not end with an ellipsis, we append
9191 *PARMS is set to the chain of PARM_DECLs created. */
9194 grokparms (cp_parameter_declarator
*first_parm
, tree
*parms
)
9196 tree result
= NULL_TREE
;
9197 tree decls
= NULL_TREE
;
9198 int ellipsis
= !first_parm
|| first_parm
->ellipsis_p
;
9199 cp_parameter_declarator
*parm
;
9201 struct pointer_set_t
*unique_decls
= pointer_set_create ();
9203 for (parm
= first_parm
; parm
!= NULL
; parm
= parm
->next
)
9205 tree type
= NULL_TREE
;
9206 tree init
= parm
->default_argument
;
9210 if (parm
== no_parameters
)
9213 attrs
= parm
->decl_specifiers
.attributes
;
9214 parm
->decl_specifiers
.attributes
= NULL_TREE
;
9215 decl
= grokdeclarator (parm
->declarator
, &parm
->decl_specifiers
,
9216 PARM
, init
!= NULL_TREE
, &attrs
);
9217 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
9221 cplus_decl_attributes (&decl
, attrs
, 0);
9223 type
= TREE_TYPE (decl
);
9224 if (VOID_TYPE_P (type
))
9226 if (same_type_p (type
, void_type_node
)
9227 && DECL_SELF_REFERENCE_P (type
)
9228 && !DECL_NAME (decl
) && !result
&& !parm
->next
&& !ellipsis
)
9229 /* this is a parmlist of `(void)', which is ok. */
9231 cxx_incomplete_type_error (decl
, type
);
9232 /* It's not a good idea to actually create parameters of
9233 type `void'; other parts of the compiler assume that a
9234 void type terminates the parameter list. */
9235 type
= error_mark_node
;
9236 TREE_TYPE (decl
) = error_mark_node
;
9239 if (type
!= error_mark_node
)
9241 /* Top-level qualifiers on the parameters are
9242 ignored for function types. */
9243 type
= cp_build_qualified_type (type
, 0);
9244 if (TREE_CODE (type
) == METHOD_TYPE
)
9246 error ("parameter %qD invalidly declared method type", decl
);
9247 type
= build_pointer_type (type
);
9248 TREE_TYPE (decl
) = type
;
9250 else if (abstract_virtuals_error (decl
, type
))
9251 any_error
= 1; /* Seems like a good idea. */
9252 else if (POINTER_TYPE_P (type
))
9254 /* [dcl.fct]/6, parameter types cannot contain pointers
9255 (references) to arrays of unknown bound. */
9256 tree t
= TREE_TYPE (type
);
9257 int ptr
= TYPE_PTR_P (type
);
9263 else if (TREE_CODE (t
) != ARRAY_TYPE
)
9265 else if (!TYPE_DOMAIN (t
))
9269 if (TREE_CODE (t
) == ARRAY_TYPE
)
9270 error ("parameter %qD includes %s to array of unknown "
9272 decl
, ptr
? "pointer" : "reference", t
);
9277 else if (init
&& !processing_template_decl
)
9278 init
= check_default_argument (decl
, init
);
9281 if (TREE_CODE (decl
) == PARM_DECL
9282 && FUNCTION_PARAMETER_PACK_P (decl
)
9284 error ("parameter packs must be at the end of the parameter list");
9286 if (DECL_NAME (decl
))
9288 if (pointer_set_contains (unique_decls
, DECL_NAME (decl
)))
9289 error ("multiple parameters named %qE", DECL_NAME (decl
));
9291 pointer_set_insert (unique_decls
, DECL_NAME (decl
));
9294 TREE_CHAIN (decl
) = decls
;
9296 result
= tree_cons (init
, type
, result
);
9298 decls
= nreverse (decls
);
9299 result
= nreverse (result
);
9301 result
= chainon (result
, void_list_node
);
9304 pointer_set_destroy (unique_decls
);
9309 /* D is a constructor or overloaded `operator='.
9311 Let T be the class in which D is declared. Then, this function
9314 -1 if D's is an ill-formed constructor or copy assignment operator
9315 whose first parameter is of type `T'.
9316 0 if D is not a copy constructor or copy assignment
9318 1 if D is a copy constructor or copy assignment operator whose
9319 first parameter is a reference to const qualified T.
9320 2 if D is a copy constructor or copy assignment operator whose
9321 first parameter is a reference to non-const qualified T.
9323 This function can be used as a predicate. Positive values indicate
9324 a copy constructor and nonzero values indicate a copy assignment
9328 copy_fn_p (const_tree d
)
9334 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
9336 if (TREE_CODE (d
) == TEMPLATE_DECL
9337 || (DECL_TEMPLATE_INFO (d
)
9338 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
9339 /* Instantiations of template member functions are never copy
9340 functions. Note that member functions of templated classes are
9341 represented as template functions internally, and we must
9342 accept those as copy functions. */
9345 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
9349 arg_type
= TREE_VALUE (args
);
9350 if (arg_type
== error_mark_node
)
9353 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
9355 /* Pass by value copy assignment operator. */
9358 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
9359 && !TYPE_REF_IS_RVALUE (arg_type
)
9360 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
9362 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
9368 args
= TREE_CHAIN (args
);
9370 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
9371 /* There are more non-optional args. */
9377 /* D is a constructor or overloaded `operator='.
9379 Let T be the class in which D is declared. Then, this function
9380 returns true when D is a move constructor or move assignment
9381 operator, false otherwise. */
9384 move_fn_p (const_tree d
)
9388 bool result
= false;
9390 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
9392 if (cxx_dialect
== cxx98
)
9393 /* There are no move constructors if we are in C++98 mode. */
9396 if (TREE_CODE (d
) == TEMPLATE_DECL
9397 || (DECL_TEMPLATE_INFO (d
)
9398 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
9399 /* Instantiations of template member functions are never copy
9400 functions. Note that member functions of templated classes are
9401 represented as template functions internally, and we must
9402 accept those as copy functions. */
9405 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
9409 arg_type
= TREE_VALUE (args
);
9410 if (arg_type
== error_mark_node
)
9413 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
9414 && TYPE_REF_IS_RVALUE (arg_type
)
9415 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
9419 args
= TREE_CHAIN (args
);
9421 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
9422 /* There are more non-optional args. */
9428 /* Remember any special properties of member function DECL. */
9430 void grok_special_member_properties (tree decl
)
9434 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
9437 class_type
= DECL_CONTEXT (decl
);
9438 if (DECL_CONSTRUCTOR_P (decl
))
9440 int ctor
= copy_fn_p (decl
);
9442 TYPE_HAS_CONSTRUCTOR (class_type
) = 1;
9448 A non-template constructor for class X is a copy
9449 constructor if its first parameter is of type X&, const
9450 X&, volatile X& or const volatile X&, and either there
9451 are no other parameters or else all other parameters have
9452 default arguments. */
9453 TYPE_HAS_INIT_REF (class_type
) = 1;
9455 TYPE_HAS_CONST_INIT_REF (class_type
) = 1;
9457 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
9458 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
9460 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
9464 A non-template assignment operator for class X is a copy
9465 assignment operator if its parameter is of type X, X&, const
9466 X&, volatile X& or const volatile X&. */
9468 int assop
= copy_fn_p (decl
);
9472 TYPE_HAS_ASSIGN_REF (class_type
) = 1;
9474 TYPE_HAS_CONST_ASSIGN_REF (class_type
) = 1;
9479 /* Check a constructor DECL has the correct form. Complains
9480 if the class has a constructor of the form X(X). */
9483 grok_ctor_properties (const_tree ctype
, const_tree decl
)
9485 int ctor_parm
= copy_fn_p (decl
);
9491 A declaration of a constructor for a class X is ill-formed if
9492 its first parameter is of type (optionally cv-qualified) X
9493 and either there are no other parameters or else all other
9494 parameters have default arguments.
9496 We *don't* complain about member template instantiations that
9497 have this form, though; they can occur as we try to decide
9498 what constructor to use during overload resolution. Since
9499 overload resolution will never prefer such a constructor to
9500 the non-template copy constructor (which is either explicitly
9501 or implicitly defined), there's no need to worry about their
9502 existence. Theoretically, they should never even be
9503 instantiated, but that's hard to forestall. */
9504 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9512 /* An operator with this code is unary, but can also be binary. */
9515 ambi_op_p (enum tree_code code
)
9517 return (code
== INDIRECT_REF
9518 || code
== ADDR_EXPR
9519 || code
== UNARY_PLUS_EXPR
9520 || code
== NEGATE_EXPR
9521 || code
== PREINCREMENT_EXPR
9522 || code
== PREDECREMENT_EXPR
);
9525 /* An operator with this name can only be unary. */
9528 unary_op_p (enum tree_code code
)
9530 return (code
== TRUTH_NOT_EXPR
9531 || code
== BIT_NOT_EXPR
9532 || code
== COMPONENT_REF
9533 || code
== TYPE_EXPR
);
9536 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9537 errors are issued for invalid declarations. */
9540 grok_op_properties (tree decl
, bool complain
)
9542 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
9544 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
9545 tree name
= DECL_NAME (decl
);
9546 enum tree_code operator_code
;
9551 /* Count the number of arguments and check for ellipsis. */
9552 for (argtype
= argtypes
, arity
= 0;
9553 argtype
&& argtype
!= void_list_node
;
9554 argtype
= TREE_CHAIN (argtype
))
9556 ellipsis_p
= !argtype
;
9558 class_type
= DECL_CONTEXT (decl
);
9559 if (class_type
&& !CLASS_TYPE_P (class_type
))
9560 class_type
= NULL_TREE
;
9562 if (DECL_CONV_FN_P (decl
))
9563 operator_code
= TYPE_EXPR
;
9567 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9568 if (ansi_opname (CODE) == name) \
9570 operator_code = (CODE); \
9573 else if (ansi_assopname (CODE) == name) \
9575 operator_code = (CODE); \
9576 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9580 #include "operators.def"
9586 gcc_assert (operator_code
!= LAST_CPLUS_TREE_CODE
);
9587 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
9590 switch (operator_code
)
9593 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
9597 TYPE_GETS_DELETE (class_type
) |= 1;
9601 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
9604 case VEC_DELETE_EXPR
:
9605 TYPE_GETS_DELETE (class_type
) |= 2;
9612 /* [basic.std.dynamic.allocation]/1:
9614 A program is ill-formed if an allocation function is declared
9615 in a namespace scope other than global scope or declared static
9618 The same also holds true for deallocation functions. */
9619 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
9620 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
9622 if (DECL_NAMESPACE_SCOPE_P (decl
))
9624 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
9626 error ("%qD may not be declared within a namespace", decl
);
9629 else if (!TREE_PUBLIC (decl
))
9631 error ("%qD may not be declared as static", decl
);
9637 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
9638 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
9639 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
9640 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
9643 /* An operator function must either be a non-static member function
9644 or have at least one parameter of a class, a reference to a class,
9645 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9646 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
9648 if (operator_code
== TYPE_EXPR
9649 || operator_code
== CALL_EXPR
9650 || operator_code
== COMPONENT_REF
9651 || operator_code
== ARRAY_REF
9652 || operator_code
== NOP_EXPR
)
9654 error ("%qD must be a nonstatic member function", decl
);
9661 if (DECL_STATIC_FUNCTION_P (decl
))
9663 error ("%qD must be either a non-static member "
9664 "function or a non-member function", decl
);
9668 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
9670 tree arg
= non_reference (TREE_VALUE (p
));
9671 if (arg
== error_mark_node
)
9674 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9675 because these checks are performed even on
9676 template functions. */
9677 if (IS_AGGR_TYPE (arg
) || TREE_CODE (arg
) == ENUMERAL_TYPE
)
9681 if (!p
|| p
== void_list_node
)
9684 error ("%qD must have an argument of class or "
9685 "enumerated type", decl
);
9691 /* There are no restrictions on the arguments to an overloaded
9693 if (operator_code
== CALL_EXPR
)
9696 /* Warn about conversion operators that will never be used. */
9697 if (IDENTIFIER_TYPENAME_P (name
)
9698 && ! DECL_TEMPLATE_INFO (decl
)
9700 /* Warn only declaring the function; there is no need to
9701 warn again about out-of-class definitions. */
9702 && class_type
== current_class_type
)
9704 tree t
= TREE_TYPE (name
);
9705 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
9706 const char *what
= 0;
9709 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
9711 if (TREE_CODE (t
) == VOID_TYPE
)
9713 else if (class_type
)
9715 if (t
== class_type
)
9716 what
= "the same type";
9717 /* Don't force t to be complete here. */
9718 else if (IS_AGGR_TYPE (t
)
9719 && COMPLETE_TYPE_P (t
)
9720 && DERIVED_FROM_P (t
, class_type
))
9721 what
= "a base class";
9725 warning (OPT_Wconversion
, "conversion to %s%s will never use a type "
9726 "conversion operator",
9727 ref
? "a reference to " : "", what
);
9730 if (operator_code
== COND_EXPR
)
9733 error ("ISO C++ prohibits overloading operator ?:");
9736 else if (ellipsis_p
)
9738 error ("%qD must not have variable number of arguments", decl
);
9741 else if (ambi_op_p (operator_code
))
9744 /* We pick the one-argument operator codes by default, so
9745 we don't have to change anything. */
9747 else if (arity
== 2)
9749 /* If we thought this was a unary operator, we now know
9750 it to be a binary operator. */
9751 switch (operator_code
)
9754 operator_code
= MULT_EXPR
;
9758 operator_code
= BIT_AND_EXPR
;
9761 case UNARY_PLUS_EXPR
:
9762 operator_code
= PLUS_EXPR
;
9766 operator_code
= MINUS_EXPR
;
9769 case PREINCREMENT_EXPR
:
9770 operator_code
= POSTINCREMENT_EXPR
;
9773 case PREDECREMENT_EXPR
:
9774 operator_code
= POSTDECREMENT_EXPR
;
9781 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
9783 if ((operator_code
== POSTINCREMENT_EXPR
9784 || operator_code
== POSTDECREMENT_EXPR
)
9785 && ! processing_template_decl
9786 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
9789 error ("postfix %qD must take %<int%> as its argument",
9792 error ("postfix %qD must take %<int%> as its second "
9800 error ("%qD must take either zero or one argument", decl
);
9802 error ("%qD must take either one or two arguments", decl
);
9806 /* More Effective C++ rule 6. */
9808 && (operator_code
== POSTINCREMENT_EXPR
9809 || operator_code
== POSTDECREMENT_EXPR
9810 || operator_code
== PREINCREMENT_EXPR
9811 || operator_code
== PREDECREMENT_EXPR
))
9813 tree arg
= TREE_VALUE (argtypes
);
9814 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
9815 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
9816 arg
= TREE_TYPE (arg
);
9817 arg
= TYPE_MAIN_VARIANT (arg
);
9818 if (operator_code
== PREINCREMENT_EXPR
9819 || operator_code
== PREDECREMENT_EXPR
)
9821 if (TREE_CODE (ret
) != REFERENCE_TYPE
9822 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
9824 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
9825 build_reference_type (arg
));
9829 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
9830 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
9834 else if (unary_op_p (operator_code
))
9839 error ("%qD must take %<void%>", decl
);
9841 error ("%qD must take exactly one argument", decl
);
9845 else /* if (binary_op_p (operator_code)) */
9850 error ("%qD must take exactly one argument", decl
);
9852 error ("%qD must take exactly two arguments", decl
);
9856 /* More Effective C++ rule 7. */
9858 && (operator_code
== TRUTH_ANDIF_EXPR
9859 || operator_code
== TRUTH_ORIF_EXPR
9860 || operator_code
== COMPOUND_EXPR
))
9861 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
9865 /* Effective C++ rule 23. */
9868 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
9869 && (operator_code
== PLUS_EXPR
9870 || operator_code
== MINUS_EXPR
9871 || operator_code
== TRUNC_DIV_EXPR
9872 || operator_code
== MULT_EXPR
9873 || operator_code
== TRUNC_MOD_EXPR
)
9874 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
9875 warning (OPT_Weffc__
, "%qD should return by value", decl
);
9878 for (; argtypes
&& argtypes
!= void_list_node
;
9879 argtypes
= TREE_CHAIN (argtypes
))
9880 if (TREE_PURPOSE (argtypes
))
9882 TREE_PURPOSE (argtypes
) = NULL_TREE
;
9883 if (operator_code
== POSTINCREMENT_EXPR
9884 || operator_code
== POSTDECREMENT_EXPR
)
9887 pedwarn ("%qD cannot have default arguments", decl
);
9891 error ("%qD cannot have default arguments", decl
);
9899 /* Return a string giving the keyword associate with CODE. */
9902 tag_name (enum tag_types code
)
9921 /* Name lookup in an elaborated-type-specifier (after the keyword
9922 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9923 elaborated-type-specifier is invalid, issue a diagnostic and return
9924 error_mark_node; otherwise, return the *_TYPE to which it referred.
9925 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9928 check_elaborated_type_specifier (enum tag_types tag_code
,
9930 bool allow_template_p
)
9936 struct S { struct S *p; };
9938 name lookup will find the TYPE_DECL for the implicit "S::S"
9939 typedef. Adjust for that here. */
9940 if (DECL_SELF_REFERENCE_P (decl
))
9941 decl
= TYPE_NAME (TREE_TYPE (decl
));
9943 type
= TREE_TYPE (decl
);
9945 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9946 is false for this case as well. */
9947 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9949 error ("using template type parameter %qT after %qs",
9950 type
, tag_name (tag_code
));
9951 return error_mark_node
;
9955 If the identifier resolves to a typedef-name or a template
9956 type-parameter, the elaborated-type-specifier is ill-formed.
9958 In other words, the only legitimate declaration to use in the
9959 elaborated type specifier is the implicit typedef created when
9960 the type is declared. */
9961 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
9962 && tag_code
!= typename_type
)
9964 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
9965 error ("%q+D has a previous declaration here", decl
);
9966 return error_mark_node
;
9968 else if (TREE_CODE (type
) != RECORD_TYPE
9969 && TREE_CODE (type
) != UNION_TYPE
9970 && tag_code
!= enum_type
9971 && tag_code
!= typename_type
)
9973 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
9974 error ("%q+T has a previous declaration here", type
);
9975 return error_mark_node
;
9977 else if (TREE_CODE (type
) != ENUMERAL_TYPE
9978 && tag_code
== enum_type
)
9980 error ("%qT referred to as enum", type
);
9981 error ("%q+T has a previous declaration here", type
);
9982 return error_mark_node
;
9984 else if (!allow_template_p
9985 && TREE_CODE (type
) == RECORD_TYPE
9986 && CLASSTYPE_IS_TEMPLATE (type
))
9988 /* If a class template appears as elaborated type specifier
9989 without a template header such as:
9991 template <class T> class C {};
9992 void f(class C); // No template header here
9994 then the required template argument is missing. */
9995 error ("template argument required for %<%s %T%>",
9996 tag_name (tag_code
),
9997 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
9998 return error_mark_node
;
10004 /* Lookup NAME in elaborate type specifier in scope according to
10005 SCOPE and issue diagnostics if necessary.
10006 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10007 found, and ERROR_MARK_NODE for type error. */
10010 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
10011 tag_scope scope
, bool template_header_p
)
10015 if (scope
== ts_global
)
10017 /* First try ordinary name lookup, ignoring hidden class name
10018 injected via friend declaration. */
10019 decl
= lookup_name_prefer_type (name
, 2);
10020 /* If that fails, the name will be placed in the smallest
10021 non-class, non-function-prototype scope according to 3.3.1/5.
10022 We may already have a hidden name declared as friend in this
10023 scope. So lookup again but not ignoring hidden names.
10024 If we find one, that name will be made visible rather than
10025 creating a new tag. */
10027 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
10030 decl
= lookup_type_scope (name
, scope
);
10032 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
10033 decl
= DECL_TEMPLATE_RESULT (decl
);
10035 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
10037 /* Look for invalid nested type:
10041 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
10043 error ("%qD has the same name as the class in which it is "
10046 return error_mark_node
;
10049 /* Two cases we need to consider when deciding if a class
10050 template is allowed as an elaborated type specifier:
10051 1. It is a self reference to its own class.
10052 2. It comes with a template header.
10056 template <class T> class C {
10057 class C *c1; // DECL_SELF_REFERENCE_P is true
10060 template <class U> class C; // template_header_p is true
10061 template <class T> class C<T>::D {
10062 class C *c2; // DECL_SELF_REFERENCE_P is true
10065 t
= check_elaborated_type_specifier (tag_code
,
10068 | DECL_SELF_REFERENCE_P (decl
));
10071 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
10073 error ("reference to %qD is ambiguous", name
);
10074 print_candidates (decl
);
10075 return error_mark_node
;
10081 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10082 Define the tag as a forward-reference if it is not defined.
10084 If a declaration is given, process it here, and report an error if
10085 multiple declarations are not identical.
10087 SCOPE is TS_CURRENT when this is also a definition. Only look in
10088 the current frame for the name (since C++ allows new names in any
10089 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10090 declaration. Only look beginning from the current scope outward up
10091 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10093 TEMPLATE_HEADER_P is true when this declaration is preceded by
10094 a set of template parameters. */
10097 xref_tag (enum tag_types tag_code
, tree name
,
10098 tag_scope scope
, bool template_header_p
)
10100 enum tree_code code
;
10102 tree context
= NULL_TREE
;
10104 timevar_push (TV_NAME_LOOKUP
);
10106 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
10112 code
= RECORD_TYPE
;
10118 code
= ENUMERAL_TYPE
;
10121 gcc_unreachable ();
10124 /* In case of anonymous name, xref_tag is only called to
10125 make type node and push name. Name lookup is not required. */
10126 if (ANON_AGGRNAME_P (name
))
10129 t
= lookup_and_check_tag (tag_code
, name
,
10130 scope
, template_header_p
);
10132 if (t
== error_mark_node
)
10133 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10135 if (scope
!= ts_current
&& t
&& current_class_type
10136 && template_class_depth (current_class_type
)
10137 && template_header_p
)
10139 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10140 definition of this tag. Since, in addition, we are currently
10141 processing a (member) template declaration of a template
10142 class, we must be very careful; consider:
10149 { template <class V>
10150 friend struct S1; };
10152 Here, the S2::S1 declaration should not be confused with the
10153 outer declaration. In particular, the inner version should
10154 have a template parameter of level 2, not level 1. This
10155 would be particularly important if the member declaration
10158 template <class V = U> friend struct S1;
10160 say, when we should tsubst into `U' when instantiating
10161 S2. On the other hand, when presented with:
10171 we must find the inner binding eventually. We
10172 accomplish this by making sure that the new type we
10173 create to represent this declaration has the right
10175 context
= TYPE_CONTEXT (t
);
10181 /* If no such tag is yet defined, create a forward-reference node
10182 and record it as the "definition".
10183 When a real declaration of this type is found,
10184 the forward-reference will be altered into a real type. */
10185 if (code
== ENUMERAL_TYPE
)
10187 error ("use of enum %q#D without previous declaration", name
);
10188 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10192 t
= make_aggr_type (code
);
10193 TYPE_CONTEXT (t
) = context
;
10194 t
= pushtag (name
, t
, scope
);
10199 if (template_header_p
&& IS_AGGR_TYPE (t
))
10201 if (!redeclare_class_template (t
, current_template_parms
))
10202 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10204 else if (!processing_template_decl
10205 && CLASS_TYPE_P (t
)
10206 && CLASSTYPE_IS_TEMPLATE (t
))
10208 error ("redeclaration of %qT as a non-template", t
);
10209 error ("previous declaration %q+D", t
);
10210 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10213 /* Make injected friend class visible. */
10214 if (scope
!= ts_within_enclosing_non_class
10215 && hidden_name_p (TYPE_NAME (t
)))
10217 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
10218 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
10220 if (TYPE_TEMPLATE_INFO (t
))
10222 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
10223 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
10228 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, t
);
10232 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
10234 enum tag_types tag_kind
;
10236 if (TREE_CODE (old
) == RECORD_TYPE
)
10237 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
10239 tag_kind
= union_type
;
10241 if (id
== NULL_TREE
)
10242 id
= TYPE_IDENTIFIER (old
);
10244 return xref_tag (tag_kind
, id
, scope
, false);
10247 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10248 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10249 access_* node, and the TREE_VALUE is the type of the base-class.
10250 Non-NULL TREE_TYPE indicates virtual inheritance.
10252 Returns true if the binfo hierarchy was successfully created,
10253 false if an error was detected. */
10256 xref_basetypes (tree ref
, tree base_list
)
10259 tree binfo
, base_binfo
;
10260 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
10261 unsigned max_bases
= 0; /* Maximum direct bases. */
10263 tree default_access
;
10264 tree igo_prev
; /* Track Inheritance Graph Order. */
10266 if (ref
== error_mark_node
)
10269 /* The base of a derived class is private by default, all others are
10271 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
10272 && CLASSTYPE_DECLARED_CLASS (ref
)
10273 ? access_private_node
: access_public_node
);
10275 /* First, make sure that any templates in base-classes are
10276 instantiated. This ensures that if we call ourselves recursively
10277 we do not get confused about which classes are marked and which
10279 basep
= &base_list
;
10282 tree basetype
= TREE_VALUE (*basep
);
10284 if (!(processing_template_decl
&& uses_template_parms (basetype
))
10285 && !complete_type_or_else (basetype
, NULL
))
10286 /* An incomplete type. Remove it from the list. */
10287 *basep
= TREE_CHAIN (*basep
);
10291 if (TREE_TYPE (*basep
))
10293 if (CLASS_TYPE_P (basetype
))
10294 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
10295 basep
= &TREE_CHAIN (*basep
);
10299 TYPE_MARKED_P (ref
) = 1;
10301 /* The binfo slot should be empty, unless this is an (ill-formed)
10303 gcc_assert (!TYPE_BINFO (ref
) || TYPE_SIZE (ref
));
10304 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
10306 binfo
= make_tree_binfo (max_bases
);
10308 TYPE_BINFO (ref
) = binfo
;
10309 BINFO_OFFSET (binfo
) = size_zero_node
;
10310 BINFO_TYPE (binfo
) = ref
;
10314 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
10315 /* An aggregate cannot have baseclasses. */
10316 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
10318 if (TREE_CODE (ref
) == UNION_TYPE
)
10320 error ("derived union %qT invalid", ref
);
10327 if (TYPE_FOR_JAVA (ref
))
10329 error ("Java class %qT cannot have multiple bases", ref
);
10336 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
10338 if (TYPE_FOR_JAVA (ref
))
10340 error ("Java class %qT cannot have virtual bases", ref
);
10345 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
10347 tree access
= TREE_PURPOSE (base_list
);
10348 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
10349 tree basetype
= TREE_VALUE (base_list
);
10351 if (access
== access_default_node
)
10352 access
= default_access
;
10354 if (PACK_EXPANSION_P (basetype
))
10355 basetype
= PACK_EXPANSION_PATTERN (basetype
);
10356 if (TREE_CODE (basetype
) == TYPE_DECL
)
10357 basetype
= TREE_TYPE (basetype
);
10358 if (TREE_CODE (basetype
) != RECORD_TYPE
10359 && TREE_CODE (basetype
) != TYPENAME_TYPE
10360 && TREE_CODE (basetype
) != TEMPLATE_TYPE_PARM
10361 && TREE_CODE (basetype
) != BOUND_TEMPLATE_TEMPLATE_PARM
)
10363 error ("base type %qT fails to be a struct or class type",
10368 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
10369 TYPE_FOR_JAVA (ref
) = 1;
10371 base_binfo
= NULL_TREE
;
10372 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
10374 base_binfo
= TYPE_BINFO (basetype
);
10375 /* The original basetype could have been a typedef'd type. */
10376 basetype
= BINFO_TYPE (base_binfo
);
10378 /* Inherit flags from the base. */
10379 TYPE_HAS_NEW_OPERATOR (ref
)
10380 |= TYPE_HAS_NEW_OPERATOR (basetype
);
10381 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
10382 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
10383 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
10384 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
10385 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
10386 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
10387 CLASSTYPE_REPEATED_BASE_P (ref
)
10388 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
10391 /* We must do this test after we've seen through a typedef
10393 if (TYPE_MARKED_P (basetype
))
10395 if (basetype
== ref
)
10396 error ("recursive type %qT undefined", basetype
);
10398 error ("duplicate base type %qT invalid", basetype
);
10402 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
10403 /* Regenerate the pack expansion for the bases. */
10404 basetype
= make_pack_expansion (basetype
);
10406 TYPE_MARKED_P (basetype
) = 1;
10408 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
10409 &igo_prev
, via_virtual
);
10410 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
10411 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
10413 BINFO_BASE_APPEND (binfo
, base_binfo
);
10414 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
10417 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
10418 /* If we have space in the vbase vector, we must have shared at
10419 least one of them, and are therefore diamond shaped. */
10420 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
10422 /* Unmark all the types. */
10423 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
10424 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
10425 TYPE_MARKED_P (ref
) = 0;
10427 /* Now see if we have a repeated base type. */
10428 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
10430 for (base_binfo
= binfo
; base_binfo
;
10431 base_binfo
= TREE_CHAIN (base_binfo
))
10433 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
10435 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
10438 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
10440 for (base_binfo
= binfo
; base_binfo
;
10441 base_binfo
= TREE_CHAIN (base_binfo
))
10442 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
10443 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
10452 /* Begin compiling the definition of an enumeration type.
10454 Returns the type object, as yet incomplete.
10455 Also records info about it so that build_enumerator
10456 may be used to declare the individual values as they are read. */
10459 start_enum (tree name
)
10463 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
10465 /* If this is the real definition for a previous forward reference,
10466 fill in the contents in the same object that used to be the
10467 forward reference. */
10469 enumtype
= lookup_and_check_tag (enum_type
, name
,
10470 /*tag_scope=*/ts_current
,
10471 /*template_header_p=*/false);
10473 if (enumtype
!= NULL_TREE
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
10475 error ("multiple definition of %q#T", enumtype
);
10476 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype
));
10477 /* Clear out TYPE_VALUES, and start again. */
10478 TYPE_VALUES (enumtype
) = NULL_TREE
;
10482 /* In case of error, make a dummy enum to allow parsing to
10484 if (enumtype
== error_mark_node
)
10485 name
= make_anon_name ();
10487 enumtype
= make_node (ENUMERAL_TYPE
);
10488 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
10494 /* After processing and defining all the values of an enumeration type,
10495 install their decls in the enumeration type and finish it off.
10496 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10499 finish_enum (tree enumtype
)
10508 bool use_short_enum
;
10512 integer_type_kind itk
;
10513 tree underlying_type
= NULL_TREE
;
10515 /* We built up the VALUES in reverse order. */
10516 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
10518 /* For an enum defined in a template, just set the type of the values;
10519 all further processing is postponed until the template is
10520 instantiated. We need to set the type so that tsubst of a CONST_DECL
10522 if (processing_template_decl
)
10524 for (values
= TYPE_VALUES (enumtype
);
10526 values
= TREE_CHAIN (values
))
10527 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
10528 if (at_function_scope_p ())
10529 add_stmt (build_min (TAG_DEFN
, enumtype
));
10533 /* Determine the minimum and maximum values of the enumerators. */
10534 if (TYPE_VALUES (enumtype
))
10536 minnode
= maxnode
= NULL_TREE
;
10538 for (values
= TYPE_VALUES (enumtype
);
10540 values
= TREE_CHAIN (values
))
10542 decl
= TREE_VALUE (values
);
10544 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10545 each enumerator has the type of its enumeration. Prior to the
10546 closing brace, the type of each enumerator is the type of its
10547 initializing value. */
10548 TREE_TYPE (decl
) = enumtype
;
10550 /* Update the minimum and maximum values, if appropriate. */
10551 value
= DECL_INITIAL (decl
);
10552 if (value
== error_mark_node
)
10553 value
= integer_zero_node
;
10554 /* Figure out what the minimum and maximum values of the
10555 enumerators are. */
10557 minnode
= maxnode
= value
;
10558 else if (tree_int_cst_lt (maxnode
, value
))
10560 else if (tree_int_cst_lt (value
, minnode
))
10567 If the enumerator-list is empty, the underlying type is as if
10568 the enumeration had a single enumerator with value 0. */
10569 minnode
= maxnode
= integer_zero_node
;
10571 /* Compute the number of bits require to represent all values of the
10572 enumeration. We must do this before the type of MINNODE and
10573 MAXNODE are transformed, since min_precision relies on the
10574 TREE_TYPE of the value it is passed. */
10575 unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
10576 lowprec
= min_precision (minnode
, unsignedp
);
10577 highprec
= min_precision (maxnode
, unsignedp
);
10578 precision
= MAX (lowprec
, highprec
);
10580 /* Determine the underlying type of the enumeration.
10584 The underlying type of an enumeration is an integral type that
10585 can represent all the enumerator values defined in the
10586 enumeration. It is implementation-defined which integral type is
10587 used as the underlying type for an enumeration except that the
10588 underlying type shall not be larger than int unless the value of
10589 an enumerator cannot fit in an int or unsigned int.
10591 We use "int" or an "unsigned int" as the underlying type, even if
10592 a smaller integral type would work, unless the user has
10593 explicitly requested that we use the smallest possible type. The
10594 user can request that for all enumerations with a command line
10595 flag, or for just one enumeration with an attribute. */
10597 use_short_enum
= flag_short_enums
10598 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
10600 for (itk
= (use_short_enum
? itk_char
: itk_int
);
10604 underlying_type
= integer_types
[itk
];
10605 if (TYPE_PRECISION (underlying_type
) >= precision
10606 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
10609 if (itk
== itk_none
)
10613 IF no integral type can represent all the enumerator values, the
10614 enumeration is ill-formed. */
10615 error ("no integral type can represent all of the enumerator values "
10616 "for %qT", enumtype
);
10617 precision
= TYPE_PRECISION (long_long_integer_type_node
);
10618 underlying_type
= integer_types
[itk_unsigned_long_long
];
10621 /* Compute the minium and maximum values for the type.
10625 For an enumeration where emin is the smallest enumerator and emax
10626 is the largest, the values of the enumeration are the values of the
10627 underlying type in the range bmin to bmax, where bmin and bmax are,
10628 respectively, the smallest and largest values of the smallest bit-
10629 field that can store emin and emax. */
10631 /* The middle-end currently assumes that types with TYPE_PRECISION
10632 narrower than their underlying type are suitably zero or sign
10633 extended to fill their mode. g++ doesn't make these guarantees.
10634 Until the middle-end can represent such paradoxical types, we
10635 set the TYPE_PRECISION to the width of the underlying type. */
10636 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (underlying_type
);
10638 set_min_and_max_values_for_integral_type (enumtype
, precision
, unsignedp
);
10642 The value of sizeof() applied to an enumeration type, an object
10643 of an enumeration type, or an enumerator, is the value of sizeof()
10644 applied to the underlying type. */
10645 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
10646 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
10647 TYPE_MODE (enumtype
) = TYPE_MODE (underlying_type
);
10648 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
10649 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
10650 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
10652 /* Convert each of the enumerators to the type of the underlying
10653 type of the enumeration. */
10654 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
10656 location_t saved_location
;
10658 decl
= TREE_VALUE (values
);
10659 saved_location
= input_location
;
10660 input_location
= DECL_SOURCE_LOCATION (decl
);
10661 value
= perform_implicit_conversion (underlying_type
,
10662 DECL_INITIAL (decl
));
10663 input_location
= saved_location
;
10665 /* Do not clobber shared ints. */
10666 value
= copy_node (value
);
10668 TREE_TYPE (value
) = enumtype
;
10669 DECL_INITIAL (decl
) = value
;
10670 TREE_VALUE (values
) = value
;
10673 /* Fix up all variant types of this enum type. */
10674 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
10676 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
10677 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (enumtype
);
10678 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (enumtype
);
10679 TYPE_SIZE (t
) = TYPE_SIZE (enumtype
);
10680 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (enumtype
);
10681 TYPE_MODE (t
) = TYPE_MODE (enumtype
);
10682 TYPE_PRECISION (t
) = TYPE_PRECISION (enumtype
);
10683 TYPE_ALIGN (t
) = TYPE_ALIGN (enumtype
);
10684 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (enumtype
);
10685 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (enumtype
);
10688 /* Finish debugging output for this type. */
10689 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
10692 /* Build and install a CONST_DECL for an enumeration constant of the
10693 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10694 Assignment of sequential values by default is handled here. */
10697 build_enumerator (tree name
, tree value
, tree enumtype
)
10703 /* If the VALUE was erroneous, pretend it wasn't there; that will
10704 result in the enum being assigned the next value in sequence. */
10705 if (value
== error_mark_node
)
10708 /* Remove no-op casts from the value. */
10710 STRIP_TYPE_NOPS (value
);
10712 if (! processing_template_decl
)
10714 /* Validate and default VALUE. */
10715 if (value
!= NULL_TREE
)
10717 value
= integral_constant_value (value
);
10719 if (TREE_CODE (value
) == INTEGER_CST
)
10721 value
= perform_integral_promotions (value
);
10722 constant_expression_warning (value
);
10726 error ("enumerator value for %qD is not an integer constant", name
);
10731 /* Default based on previous value. */
10732 if (value
== NULL_TREE
)
10734 if (TYPE_VALUES (enumtype
))
10737 unsigned HOST_WIDE_INT lo
;
10741 /* The next value is the previous value plus one. We can
10742 safely assume that the previous value is an INTEGER_CST.
10743 add_double doesn't know the type of the target expression,
10744 so we must check with int_fits_type_p as well. */
10745 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
10746 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
10747 TREE_INT_CST_HIGH (prev_value
),
10749 value
= build_int_cst_wide (TREE_TYPE (prev_value
), lo
, hi
);
10750 overflowed
|= !int_fits_type_p (value
, TREE_TYPE (prev_value
));
10754 error ("overflow in enumeration values at %qD", name
);
10755 value
= error_mark_node
;
10759 value
= integer_zero_node
;
10762 /* Remove no-op casts from the value. */
10763 STRIP_TYPE_NOPS (value
);
10766 /* C++ associates enums with global, function, or class declarations. */
10767 context
= current_scope ();
10769 /* Build the actual enumeration constant. Note that the enumeration
10770 constants have the type of their initializers until the
10771 enumeration is complete:
10775 Following the closing brace of an enum-specifier, each enumer-
10776 ator has the type of its enumeration. Prior to the closing
10777 brace, the type of each enumerator is the type of its
10778 initializing value.
10780 In finish_enum we will reset the type. Of course, if we're
10781 processing a template, there may be no value. */
10782 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
10784 if (context
&& context
== current_class_type
)
10785 /* This enum declaration is local to the class. We need the full
10786 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10787 decl
= build_lang_decl (CONST_DECL
, name
, type
);
10789 /* It's a global enum, or it's local to a function. (Note local to
10790 a function could mean local to a class method. */
10791 decl
= build_decl (CONST_DECL
, name
, type
);
10793 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
10794 TREE_CONSTANT (decl
) = 1;
10795 TREE_INVARIANT (decl
) = 1;
10796 TREE_READONLY (decl
) = 1;
10797 DECL_INITIAL (decl
) = value
;
10799 if (context
&& context
== current_class_type
)
10800 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10801 on the TYPE_FIELDS list for `S'. (That's so that you can say
10802 things like `S::i' later.) */
10803 finish_member_declaration (decl
);
10807 /* Add this enumeration constant to the list for this type. */
10808 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
10812 /* We're defining DECL. Make sure that it's type is OK. */
10815 check_function_type (tree decl
, tree current_function_parms
)
10817 tree fntype
= TREE_TYPE (decl
);
10818 tree return_type
= complete_type (TREE_TYPE (fntype
));
10820 /* In a function definition, arg types must be complete. */
10821 require_complete_types_for_parms (current_function_parms
);
10823 if (dependent_type_p (return_type
))
10825 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
10827 tree args
= TYPE_ARG_TYPES (fntype
);
10829 error ("return type %q#T is incomplete", return_type
);
10831 /* Make it return void instead. */
10832 if (TREE_CODE (fntype
) == METHOD_TYPE
)
10833 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
10835 TREE_CHAIN (args
));
10837 fntype
= build_function_type (void_type_node
, args
);
10839 = build_exception_variant (fntype
,
10840 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
10843 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
10846 /* Create the FUNCTION_DECL for a function definition.
10847 DECLSPECS and DECLARATOR are the parts of the declaration;
10848 they describe the function's name and the type it returns,
10849 but twisted together in a fashion that parallels the syntax of C.
10851 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10852 DECLARATOR is really the DECL for the function we are about to
10853 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10854 indicating that the function is an inline defined in-class.
10856 This function creates a binding context for the function body
10857 as well as setting up the FUNCTION_DECL in current_function_decl.
10859 For C++, we must first check whether that datum makes any sense.
10860 For example, "class A local_a(1,2);" means that variable local_a
10861 is an aggregate of type A, which should have a constructor
10862 applied to it with the argument list [1, 2].
10864 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
10865 or may be a BLOCK if the function has been defined previously
10866 in this translation unit. On exit, DECL_INITIAL (decl1) will be
10867 error_mark_node if the function has never been defined, or
10868 a BLOCK if the function has been defined somewhere. */
10871 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
10873 tree ctype
= NULL_TREE
;
10876 int doing_friend
= 0;
10877 struct cp_binding_level
*bl
;
10878 tree current_function_parms
;
10879 struct c_fileinfo
*finfo
10880 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
10881 bool honor_interface
;
10883 /* Sanity check. */
10884 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
10885 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
10887 fntype
= TREE_TYPE (decl1
);
10888 if (TREE_CODE (fntype
) == METHOD_TYPE
)
10889 ctype
= TYPE_METHOD_BASETYPE (fntype
);
10891 /* ISO C++ 11.4/5. A friend function defined in a class is in
10892 the (lexical) scope of the class in which it is defined. */
10893 if (!ctype
&& DECL_FRIEND_P (decl1
))
10895 ctype
= DECL_FRIEND_CONTEXT (decl1
);
10897 /* CTYPE could be null here if we're dealing with a template;
10898 for example, `inline friend float foo()' inside a template
10899 will have no CTYPE set. */
10900 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
10906 if (DECL_DECLARED_INLINE_P (decl1
)
10907 && lookup_attribute ("noinline", attrs
))
10908 warning (0, "inline function %q+D given attribute noinline", decl1
);
10910 /* Handle gnu_inline attribute. */
10911 if (GNU_INLINE_P (decl1
))
10913 DECL_EXTERNAL (decl1
) = 1;
10914 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
10915 DECL_INTERFACE_KNOWN (decl1
) = 1;
10916 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
10919 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
10920 /* This is a constructor, we must ensure that any default args
10921 introduced by this definition are propagated to the clones
10922 now. The clones are used directly in overload resolution. */
10923 adjust_clone_args (decl1
);
10925 /* Sometimes we don't notice that a function is a static member, and
10926 build a METHOD_TYPE for it. Fix that up now. */
10927 if (ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
10928 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
)
10930 revert_static_member_fn (decl1
);
10934 /* Set up current_class_type, and enter the scope of the class, if
10937 push_nested_class (ctype
);
10938 else if (DECL_STATIC_FUNCTION_P (decl1
))
10939 push_nested_class (DECL_CONTEXT (decl1
));
10941 /* Now that we have entered the scope of the class, we must restore
10942 the bindings for any template parameters surrounding DECL1, if it
10943 is an inline member template. (Order is important; consider the
10944 case where a template parameter has the same name as a field of
10945 the class.) It is not until after this point that
10946 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10947 if (flags
& SF_INCLASS_INLINE
)
10948 maybe_begin_member_template_processing (decl1
);
10950 /* Effective C++ rule 15. */
10952 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
10953 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
10954 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
10956 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10957 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10958 if (!DECL_INITIAL (decl1
))
10959 DECL_INITIAL (decl1
) = error_mark_node
;
10961 /* This function exists in static storage.
10962 (This does not mean `static' in the C sense!) */
10963 TREE_STATIC (decl1
) = 1;
10965 /* We must call push_template_decl after current_class_type is set
10966 up. (If we are processing inline definitions after exiting a
10967 class scope, current_class_type will be NULL_TREE until set above
10968 by push_nested_class.) */
10969 if (processing_template_decl
)
10971 /* FIXME: Handle error_mark_node more gracefully. */
10972 tree newdecl1
= push_template_decl (decl1
);
10973 if (newdecl1
!= error_mark_node
)
10977 /* We are now in the scope of the function being defined. */
10978 current_function_decl
= decl1
;
10980 /* Save the parm names or decls from this function's declarator
10981 where store_parm_decls will find them. */
10982 current_function_parms
= DECL_ARGUMENTS (decl1
);
10984 /* Make sure the parameter and return types are reasonable. When
10985 you declare a function, these types can be incomplete, but they
10986 must be complete when you define the function. */
10987 check_function_type (decl1
, current_function_parms
);
10989 /* Build the return declaration for the function. */
10990 restype
= TREE_TYPE (fntype
);
10991 if (DECL_RESULT (decl1
) == NULL_TREE
)
10995 resdecl
= build_decl (RESULT_DECL
, 0, TYPE_MAIN_VARIANT (restype
));
10996 DECL_ARTIFICIAL (resdecl
) = 1;
10997 DECL_IGNORED_P (resdecl
) = 1;
10998 DECL_RESULT (decl1
) = resdecl
;
11000 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
11003 /* Let the user know we're compiling this function. */
11004 announce_function (decl1
);
11006 /* Record the decl so that the function name is defined.
11007 If we already have a decl for this name, and it is a FUNCTION_DECL,
11008 use the old decl. */
11009 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
11011 /* A specialization is not used to guide overload resolution. */
11012 if (!DECL_FUNCTION_MEMBER_P (decl1
)
11013 && !(DECL_USE_TEMPLATE (decl1
) &&
11014 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
11016 tree olddecl
= pushdecl (decl1
);
11018 if (olddecl
== error_mark_node
)
11019 /* If something went wrong when registering the declaration,
11020 use DECL1; we have to have a FUNCTION_DECL to use when
11021 parsing the body of the function. */
11025 /* Otherwise, OLDDECL is either a previous declaration
11026 of the same function or DECL1 itself. */
11028 if (warn_missing_declarations
11029 && olddecl
== decl1
11030 && !DECL_MAIN_P (decl1
)
11031 && TREE_PUBLIC (decl1
)
11032 && !DECL_DECLARED_INLINE_P (decl1
))
11036 /* Check whether DECL1 is in an anonymous
11038 for (context
= DECL_CONTEXT (decl1
);
11040 context
= DECL_CONTEXT (context
))
11042 if (TREE_CODE (context
) == NAMESPACE_DECL
11043 && DECL_NAME (context
) == NULL_TREE
)
11047 if (context
== NULL
)
11048 warning (OPT_Wmissing_declarations
,
11049 "no previous declaration for %q+D", decl1
);
11057 /* We need to set the DECL_CONTEXT. */
11058 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
11059 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
11061 fntype
= TREE_TYPE (decl1
);
11063 /* If #pragma weak applies, mark the decl appropriately now.
11064 The pragma only applies to global functions. Because
11065 determining whether or not the #pragma applies involves
11066 computing the mangled name for the declaration, we cannot
11067 apply the pragma until after we have merged this declaration
11068 with any previous declarations; if the original declaration
11069 has a linkage specification, that specification applies to
11070 the definition as well, and may affect the mangled name. */
11071 if (!DECL_CONTEXT (decl1
))
11072 maybe_apply_pragma_weak (decl1
);
11075 /* Reset this in case the call to pushdecl changed it. */
11076 current_function_decl
= decl1
;
11078 gcc_assert (DECL_INITIAL (decl1
));
11080 /* This function may already have been parsed, in which case just
11081 return; our caller will skip over the body without parsing. */
11082 if (DECL_INITIAL (decl1
) != error_mark_node
)
11085 /* Initialize RTL machinery. We cannot do this until
11086 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11087 even when processing a template; this is how we get
11088 CFUN set up, and our per-function variables initialized.
11089 FIXME factor out the non-RTL stuff. */
11090 bl
= current_binding_level
;
11091 allocate_struct_function (decl1
);
11092 current_binding_level
= bl
;
11094 /* Even though we're inside a function body, we still don't want to
11095 call expand_expr to calculate the size of a variable-sized array.
11096 We haven't necessarily assigned RTL to all variables yet, so it's
11097 not safe to try to expand expressions involving them. */
11098 cfun
->x_dont_save_pending_sizes_p
= 1;
11100 /* Start the statement-tree, start the tree now. */
11101 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
11103 /* If we are (erroneously) defining a function that we have already
11104 defined before, wipe out what we knew before. */
11105 if (!DECL_PENDING_INLINE_P (decl1
))
11106 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
11108 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
11110 /* We know that this was set up by `grokclassfn'. We do not
11111 wait until `store_parm_decls', since evil parse errors may
11112 never get us to that point. Here we keep the consistency
11113 between `current_class_type' and `current_class_ptr'. */
11114 tree t
= DECL_ARGUMENTS (decl1
);
11116 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
11117 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
11119 cp_function_chain
->x_current_class_ref
11120 = build_indirect_ref (t
, NULL
);
11121 cp_function_chain
->x_current_class_ptr
= t
;
11123 /* Constructors and destructors need to know whether they're "in
11124 charge" of initializing virtual base classes. */
11125 t
= TREE_CHAIN (t
);
11126 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
11128 current_in_charge_parm
= t
;
11129 t
= TREE_CHAIN (t
);
11131 if (DECL_HAS_VTT_PARM_P (decl1
))
11133 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
11134 current_vtt_parm
= t
;
11138 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
11139 /* Implicitly-defined methods (like the
11140 destructor for a class in which no destructor
11141 is explicitly declared) must not be defined
11142 until their definition is needed. So, we
11143 ignore interface specifications for
11144 compiler-generated functions. */
11145 && !DECL_ARTIFICIAL (decl1
));
11147 if (DECL_INTERFACE_KNOWN (decl1
))
11149 tree ctx
= decl_function_context (decl1
);
11151 if (DECL_NOT_REALLY_EXTERN (decl1
))
11152 DECL_EXTERNAL (decl1
) = 0;
11154 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
11155 && TREE_PUBLIC (ctx
))
11156 /* This is a function in a local class in an extern inline
11158 comdat_linkage (decl1
);
11160 /* If this function belongs to an interface, it is public.
11161 If it belongs to someone else's interface, it is also external.
11162 This only affects inlines and template instantiations. */
11163 else if (!finfo
->interface_unknown
&& honor_interface
)
11165 if (DECL_DECLARED_INLINE_P (decl1
)
11166 || DECL_TEMPLATE_INSTANTIATION (decl1
)
11167 || processing_template_decl
)
11169 DECL_EXTERNAL (decl1
)
11170 = (finfo
->interface_only
11171 || (DECL_DECLARED_INLINE_P (decl1
)
11172 && ! flag_implement_inlines
11173 && !DECL_VINDEX (decl1
)));
11175 /* For WIN32 we also want to put these in linkonce sections. */
11176 maybe_make_one_only (decl1
);
11179 DECL_EXTERNAL (decl1
) = 0;
11180 DECL_INTERFACE_KNOWN (decl1
) = 1;
11181 /* If this function is in an interface implemented in this file,
11182 make sure that the back end knows to emit this function
11184 if (!DECL_EXTERNAL (decl1
))
11185 mark_needed (decl1
);
11187 else if (finfo
->interface_unknown
&& finfo
->interface_only
11188 && honor_interface
)
11190 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11191 interface, we will have both finfo->interface_unknown and
11192 finfo->interface_only set. In that case, we don't want to
11193 use the normal heuristics because someone will supply a
11194 #pragma implementation elsewhere, and deducing it here would
11195 produce a conflict. */
11196 comdat_linkage (decl1
);
11197 DECL_EXTERNAL (decl1
) = 0;
11198 DECL_INTERFACE_KNOWN (decl1
) = 1;
11199 DECL_DEFER_OUTPUT (decl1
) = 1;
11203 /* This is a definition, not a reference.
11204 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11205 if (!GNU_INLINE_P (decl1
))
11206 DECL_EXTERNAL (decl1
) = 0;
11208 if ((DECL_DECLARED_INLINE_P (decl1
)
11209 || DECL_TEMPLATE_INSTANTIATION (decl1
))
11210 && ! DECL_INTERFACE_KNOWN (decl1
)
11211 /* Don't try to defer nested functions for now. */
11212 && ! decl_function_context (decl1
))
11213 DECL_DEFER_OUTPUT (decl1
) = 1;
11215 DECL_INTERFACE_KNOWN (decl1
) = 1;
11218 /* Determine the ELF visibility attribute for the function. We must not
11219 do this before calling "pushdecl", as we must allow "duplicate_decls"
11220 to merge any attributes appropriately. We also need to wait until
11222 if (!DECL_CLONED_FUNCTION_P (decl1
))
11223 determine_visibility (decl1
);
11225 begin_scope (sk_function_parms
, decl1
);
11229 if (DECL_DESTRUCTOR_P (decl1
)
11230 || (DECL_CONSTRUCTOR_P (decl1
)
11231 && targetm
.cxx
.cdtor_returns_this ()))
11233 cdtor_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
11234 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
11237 start_fname_decls ();
11239 store_parm_decls (current_function_parms
);
11243 /* Like start_preparsed_function, except that instead of a
11244 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11246 Returns 1 on success. If the DECLARATOR is not suitable for a function
11247 (it defines a datum instead), we return 0, which tells
11248 yyparse to report a parse error. */
11251 start_function (cp_decl_specifier_seq
*declspecs
,
11252 const cp_declarator
*declarator
,
11257 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
11258 /* If the declarator is not suitable for a function definition,
11259 cause a syntax error. */
11260 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
11263 if (DECL_MAIN_P (decl1
))
11264 /* main must return int. grokfndecl should have corrected it
11265 (and issued a diagnostic) if the user got it wrong. */
11266 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
11267 integer_type_node
));
11269 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
11274 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11278 use_eh_spec_block (tree fn
)
11280 return (flag_exceptions
&& flag_enforce_eh_specs
11281 && !processing_template_decl
11282 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn
))
11283 /* We insert the EH_SPEC_BLOCK only in the original
11284 function; then, it is copied automatically to the
11286 && !DECL_CLONED_FUNCTION_P (fn
)
11287 /* Implicitly-generated constructors and destructors have
11288 exception specifications. However, those specifications
11289 are the union of the possible exceptions specified by the
11290 constructors/destructors for bases and members, so no
11291 unallowed exception will ever reach this function. By
11292 not creating the EH_SPEC_BLOCK we save a little memory,
11293 and we avoid spurious warnings about unreachable
11295 && !DECL_ARTIFICIAL (fn
));
11298 /* Store the parameter declarations into the current function declaration.
11299 This is called after parsing the parameter declarations, before
11300 digesting the body of the function.
11302 Also install to binding contour return value identifier, if any. */
11305 store_parm_decls (tree current_function_parms
)
11307 tree fndecl
= current_function_decl
;
11310 /* This is a chain of any other decls that came in among the parm
11311 declarations. If a parm is declared with enum {foo, bar} x;
11312 then CONST_DECLs for foo and bar are put here. */
11313 tree nonparms
= NULL_TREE
;
11315 if (current_function_parms
)
11317 /* This case is when the function was defined with an ANSI prototype.
11318 The parms already have decls, so we need not do anything here
11319 except record them as in effect
11320 and complain if any redundant old-style parm decls were written. */
11322 tree specparms
= current_function_parms
;
11325 /* Must clear this because it might contain TYPE_DECLs declared
11327 current_binding_level
->names
= NULL
;
11329 /* If we're doing semantic analysis, then we'll call pushdecl
11330 for each of these. We must do them in reverse order so that
11331 they end in the correct forward order. */
11332 specparms
= nreverse (specparms
);
11334 for (parm
= specparms
; parm
; parm
= next
)
11336 next
= TREE_CHAIN (parm
);
11337 if (TREE_CODE (parm
) == PARM_DECL
)
11339 if (DECL_NAME (parm
) == NULL_TREE
11340 || TREE_CODE (parm
) != VOID_TYPE
)
11343 error ("parameter %qD declared void", parm
);
11347 /* If we find an enum constant or a type tag,
11348 put it aside for the moment. */
11349 TREE_CHAIN (parm
) = NULL_TREE
;
11350 nonparms
= chainon (nonparms
, parm
);
11354 /* Get the decls in their original chain order and record in the
11355 function. This is all and only the PARM_DECLs that were
11356 pushed into scope by the loop above. */
11357 DECL_ARGUMENTS (fndecl
) = getdecls ();
11360 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
11362 /* Now store the final chain of decls for the arguments
11363 as the decl-chain of the current lexical scope.
11364 Put the enumerators in as well, at the front so that
11365 DECL_ARGUMENTS is not modified. */
11366 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
11368 if (use_eh_spec_block (current_function_decl
))
11369 current_eh_spec_block
= begin_eh_spec_block ();
11373 /* We have finished doing semantic analysis on DECL, but have not yet
11374 generated RTL for its body. Save away our current state, so that
11375 when we want to generate RTL later we know what to do. */
11378 save_function_data (tree decl
)
11380 struct language_function
*f
;
11382 /* Save the language-specific per-function data so that we can
11383 get it back when we really expand this function. */
11384 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
11387 f
= GGC_NEW (struct language_function
);
11388 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
11389 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
11391 /* Clear out the bits we don't need. */
11392 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL_TREE
;
11393 f
->bindings
= NULL
;
11394 f
->x_local_names
= NULL
;
11398 /* Set the return value of the constructor (if present). */
11401 finish_constructor_body (void)
11406 if (targetm
.cxx
.cdtor_returns_this ())
11408 /* Any return from a constructor will end up here. */
11409 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
11411 val
= DECL_ARGUMENTS (current_function_decl
);
11412 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
11413 DECL_RESULT (current_function_decl
), val
);
11414 /* Return the address of the object. */
11415 exprstmt
= build_stmt (RETURN_EXPR
, val
);
11416 add_stmt (exprstmt
);
11420 /* Do all the processing for the beginning of a destructor; set up the
11421 vtable pointers and cleanups for bases and members. */
11424 begin_destructor_body (void)
11426 tree compound_stmt
;
11428 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11429 issued an error message. We still want to try to process the
11430 body of the function, but initialize_vtbl_ptrs will crash if
11431 TYPE_BINFO is NULL. */
11432 if (COMPLETE_TYPE_P (current_class_type
))
11434 compound_stmt
= begin_compound_stmt (0);
11435 /* Make all virtual function table pointers in non-virtual base
11436 classes point to CURRENT_CLASS_TYPE's virtual function
11438 initialize_vtbl_ptrs (current_class_ptr
);
11439 finish_compound_stmt (compound_stmt
);
11441 /* And insert cleanups for our bases and members so that they
11442 will be properly destroyed if we throw. */
11443 push_base_cleanups ();
11447 /* At the end of every destructor we generate code to delete the object if
11448 necessary. Do that now. */
11451 finish_destructor_body (void)
11455 /* Any return from a destructor will end up here; that way all base
11456 and member cleanups will be run when the function returns. */
11457 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
11459 /* In a virtual destructor, we must call delete. */
11460 if (DECL_VIRTUAL_P (current_function_decl
))
11463 tree virtual_size
= cxx_sizeof (current_class_type
);
11467 At the point of definition of a virtual destructor (including
11468 an implicit definition), non-placement operator delete shall
11469 be looked up in the scope of the destructor's class and if
11470 found shall be accessible and unambiguous. */
11471 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
11473 /*global_p=*/false,
11474 /*placement=*/NULL_TREE
,
11475 /*alloc_fn=*/NULL_TREE
);
11477 if_stmt
= begin_if_stmt ();
11478 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
11479 current_in_charge_parm
,
11482 finish_expr_stmt (exprstmt
);
11483 finish_then_clause (if_stmt
);
11484 finish_if_stmt (if_stmt
);
11487 if (targetm
.cxx
.cdtor_returns_this ())
11491 val
= DECL_ARGUMENTS (current_function_decl
);
11492 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
11493 DECL_RESULT (current_function_decl
), val
);
11494 /* Return the address of the object. */
11495 exprstmt
= build_stmt (RETURN_EXPR
, val
);
11496 add_stmt (exprstmt
);
11500 /* Do the necessary processing for the beginning of a function body, which
11501 in this case includes member-initializers, but not the catch clauses of
11502 a function-try-block. Currently, this means opening a binding level
11503 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11506 begin_function_body (void)
11510 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
11513 if (processing_template_decl
)
11514 /* Do nothing now. */;
11516 /* Always keep the BLOCK node associated with the outermost pair of
11517 curly braces of a function. These are needed for correct
11518 operation of dwarfout.c. */
11519 keep_next_level (true);
11521 stmt
= begin_compound_stmt (BCS_FN_BODY
);
11523 if (processing_template_decl
)
11524 /* Do nothing now. */;
11525 else if (DECL_DESTRUCTOR_P (current_function_decl
))
11526 begin_destructor_body ();
11531 /* Do the processing for the end of a function body. Currently, this means
11532 closing out the cleanups for fully-constructed bases and members, and in
11533 the case of the destructor, deleting the object if desired. Again, this
11534 is only meaningful for [cd]tors, since they are the only functions where
11535 there is a significant distinction between the main body and any
11536 function catch clauses. Handling, say, main() return semantics here
11537 would be wrong, as flowing off the end of a function catch clause for
11538 main() would also need to return 0. */
11541 finish_function_body (tree compstmt
)
11543 if (compstmt
== NULL_TREE
)
11546 /* Close the block. */
11547 finish_compound_stmt (compstmt
);
11549 if (processing_template_decl
)
11550 /* Do nothing now. */;
11551 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
11552 finish_constructor_body ();
11553 else if (DECL_DESTRUCTOR_P (current_function_decl
))
11554 finish_destructor_body ();
11557 /* Given a function, returns the BLOCK corresponding to the outermost level
11558 of curly braces, skipping the artificial block created for constructor
11562 outer_curly_brace_block (tree fndecl
)
11564 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
11565 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
11566 /* Skip the artificial function body block. */
11567 block
= BLOCK_SUBBLOCKS (block
);
11571 /* Finish up a function declaration and compile that function
11572 all the way to assembler language output. The free the storage
11573 for the function definition.
11575 FLAGS is a bitwise or of the following values:
11577 We just finished processing the body of an in-class inline
11578 function definition. (This processing will have taken place
11579 after the class definition is complete.) */
11582 finish_function (int flags
)
11584 tree fndecl
= current_function_decl
;
11585 tree fntype
, ctype
= NULL_TREE
;
11586 int inclass_inline
= (flags
& 2) != 0;
11589 /* When we get some parse errors, we can end up without a
11590 current_function_decl, so cope. */
11591 if (fndecl
== NULL_TREE
)
11592 return error_mark_node
;
11594 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
11595 && DECL_VIRTUAL_P (fndecl
)
11596 && !processing_template_decl
)
11598 tree fnclass
= DECL_CONTEXT (fndecl
);
11599 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
11600 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
11603 nested
= function_depth
> 1;
11604 fntype
= TREE_TYPE (fndecl
);
11606 /* TREE_READONLY (fndecl) = 1;
11607 This caused &foo to be of type ptr-to-const-function
11608 which then got a warning when stored in a ptr-to-function variable. */
11610 gcc_assert (building_stmt_tree ());
11611 /* The current function is being defined, so its DECL_INITIAL should
11612 be set, and unless there's a multiple definition, it should be
11613 error_mark_node. */
11614 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
11616 /* For a cloned function, we've already got all the code we need;
11617 there's no need to add any extra bits. */
11618 if (!DECL_CLONED_FUNCTION_P (fndecl
))
11620 if (DECL_MAIN_P (current_function_decl
))
11624 /* Make it so that `main' always returns 0 by default (or
11627 stmt
= finish_return_stmt (integer_one_node
);
11629 stmt
= finish_return_stmt (integer_zero_node
);
11631 /* Hack. We don't want the middle-end to warn that this
11632 return is unreachable, so put the statement on the
11634 #ifdef USE_MAPPED_LOCATION
11636 location_t linezero
= linemap_line_start (line_table
, 0, 1);
11637 SET_EXPR_LOCATION (stmt
, linezero
);
11640 annotate_with_file_line (stmt
, input_filename
, 0);
11644 if (use_eh_spec_block (current_function_decl
))
11645 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11646 (TREE_TYPE (current_function_decl
)),
11647 current_eh_spec_block
);
11650 /* If we're saving up tree structure, tie off the function now. */
11651 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
11653 finish_fname_decls ();
11655 /* If this function can't throw any exceptions, remember that. */
11656 if (!processing_template_decl
11657 && !cp_function_chain
->can_throw
11658 && !flag_non_call_exceptions
11659 && !DECL_REPLACEABLE_P (fndecl
))
11660 TREE_NOTHROW (fndecl
) = 1;
11662 /* This must come after expand_function_end because cleanups might
11663 have declarations (from inline functions) that need to go into
11664 this function's blocks. */
11666 /* If the current binding level isn't the outermost binding level
11667 for this function, either there is a bug, or we have experienced
11668 syntax errors and the statement tree is malformed. */
11669 if (current_binding_level
->kind
!= sk_function_parms
)
11671 /* Make sure we have already experienced errors. */
11672 gcc_assert (errorcount
);
11674 /* Throw away the broken statement tree and extra binding
11676 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
11678 while (current_binding_level
->kind
!= sk_function_parms
)
11680 if (current_binding_level
->kind
== sk_class
)
11681 pop_nested_class ();
11683 poplevel (0, 0, 0);
11686 poplevel (1, 0, 1);
11688 /* Statements should always be full-expressions at the outermost set
11689 of curly braces for a function. */
11690 gcc_assert (stmts_are_full_exprs_p ());
11692 /* Set up the named return value optimization, if we can. Candidate
11693 variables are selected in check_return_expr. */
11694 if (current_function_return_value
)
11696 tree r
= current_function_return_value
;
11699 if (r
!= error_mark_node
11700 /* This is only worth doing for fns that return in memory--and
11701 simpler, since we don't have to worry about promoted modes. */
11702 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
11703 /* Only allow this for variables declared in the outer scope of
11704 the function so we know that their lifetime always ends with a
11705 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11706 we were to do this optimization in tree-ssa. */
11707 && (outer
= outer_curly_brace_block (fndecl
))
11708 && chain_member (r
, BLOCK_VARS (outer
)))
11709 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
11711 current_function_return_value
= NULL_TREE
;
11714 /* Remember that we were in class scope. */
11715 if (current_class_name
)
11716 ctype
= current_class_type
;
11718 /* Must mark the RESULT_DECL as being in this function. */
11719 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
11721 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11722 to the FUNCTION_DECL node itself. */
11723 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
11725 /* Save away current state, if appropriate. */
11726 if (!processing_template_decl
)
11727 save_function_data (fndecl
);
11729 /* Complain if there's just no return statement. */
11730 if (warn_return_type
11731 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
11732 && !dependent_type_p (TREE_TYPE (fntype
))
11733 && !current_function_returns_value
&& !current_function_returns_null
11734 /* Don't complain if we abort or throw. */
11735 && !current_function_returns_abnormally
11736 && !DECL_NAME (DECL_RESULT (fndecl
))
11737 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11738 inline function, as we might never be compiled separately. */
11739 && (DECL_INLINE (fndecl
) || processing_template_decl
)
11740 /* Structor return values (if any) are set by the compiler. */
11741 && !DECL_CONSTRUCTOR_P (fndecl
)
11742 && !DECL_DESTRUCTOR_P (fndecl
))
11743 warning (OPT_Wreturn_type
, "no return statement in function returning non-void");
11745 /* Store the end of the function, so that we get good line number
11746 info for the epilogue. */
11747 cfun
->function_end_locus
= input_location
;
11749 /* Genericize before inlining. */
11750 if (!processing_template_decl
)
11752 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
11753 cp_genericize (fndecl
);
11754 /* Clear out the bits we don't need. */
11755 f
->x_current_class_ptr
= NULL
;
11756 f
->x_current_class_ref
= NULL
;
11757 f
->x_eh_spec_block
= NULL
;
11758 f
->x_in_charge_parm
= NULL
;
11759 f
->x_vtt_parm
= NULL
;
11760 f
->x_return_value
= NULL
;
11761 f
->bindings
= NULL
;
11762 f
->extern_decl_map
= NULL
;
11764 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11765 c_warn_unused_result (&DECL_SAVED_TREE (fndecl
));
11767 /* Clear out the bits we don't need. */
11768 local_names
= NULL
;
11770 /* We're leaving the context of this function, so zap cfun. It's still in
11771 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11773 current_function_decl
= NULL
;
11775 /* If this is an in-class inline definition, we may have to pop the
11776 bindings for the template parameters that we added in
11777 maybe_begin_member_template_processing when start_function was
11779 if (inclass_inline
)
11780 maybe_end_member_template_processing ();
11782 /* Leave the scope of the class. */
11784 pop_nested_class ();
11790 /* Let the error reporting routines know that we're outside a
11791 function. For a nested function, this value is used in
11792 cxx_pop_function_context and then reset via pop_function_context. */
11793 current_function_decl
= NULL_TREE
;
11798 /* Create the FUNCTION_DECL for a function definition.
11799 DECLSPECS and DECLARATOR are the parts of the declaration;
11800 they describe the return type and the name of the function,
11801 but twisted together in a fashion that parallels the syntax of C.
11803 This function creates a binding context for the function body
11804 as well as setting up the FUNCTION_DECL in current_function_decl.
11806 Returns a FUNCTION_DECL on success.
11808 If the DECLARATOR is not suitable for a function (it defines a datum
11809 instead), we return 0, which tells yyparse to report a parse error.
11811 May return void_type_node indicating that this method is actually
11812 a friend. See grokfield for more details.
11814 Came here with a `.pushlevel' .
11816 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11817 CHANGES TO CODE IN `grokfield'. */
11820 start_method (cp_decl_specifier_seq
*declspecs
,
11821 const cp_declarator
*declarator
, tree attrlist
)
11823 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
11826 if (fndecl
== error_mark_node
)
11827 return error_mark_node
;
11829 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
11831 error ("invalid member function declaration");
11832 return error_mark_node
;
11836 cplus_decl_attributes (&fndecl
, attrlist
, 0);
11838 /* Pass friends other than inline friend functions back. */
11839 if (fndecl
== void_type_node
)
11842 if (DECL_IN_AGGR_P (fndecl
))
11844 if (DECL_CONTEXT (fndecl
)
11845 && TREE_CODE (DECL_CONTEXT (fndecl
)) != NAMESPACE_DECL
)
11846 error ("%qD is already defined in class %qT", fndecl
,
11847 DECL_CONTEXT (fndecl
));
11848 return error_mark_node
;
11851 check_template_shadow (fndecl
);
11853 DECL_DECLARED_INLINE_P (fndecl
) = 1;
11854 if (flag_default_inline
)
11855 DECL_INLINE (fndecl
) = 1;
11857 /* We process method specializations in finish_struct_1. */
11858 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
11860 fndecl
= push_template_decl (fndecl
);
11861 if (fndecl
== error_mark_node
)
11865 if (! DECL_FRIEND_P (fndecl
))
11867 if (TREE_CHAIN (fndecl
))
11869 fndecl
= copy_node (fndecl
);
11870 TREE_CHAIN (fndecl
) = NULL_TREE
;
11874 finish_decl (fndecl
, NULL_TREE
, NULL_TREE
);
11876 /* Make a place for the parms. */
11877 begin_scope (sk_function_parms
, fndecl
);
11879 DECL_IN_AGGR_P (fndecl
) = 1;
11883 /* Go through the motions of finishing a function definition.
11884 We don't compile this method until after the whole class has
11887 FINISH_METHOD must return something that looks as though it
11888 came from GROKFIELD (since we are defining a method, after all).
11890 This is called after parsing the body of the function definition.
11891 STMTS is the chain of statements that makes up the function body.
11893 DECL is the ..._DECL that `start_method' provided. */
11896 finish_method (tree decl
)
11898 tree fndecl
= decl
;
11903 if (decl
== void_type_node
)
11906 old_initial
= DECL_INITIAL (fndecl
);
11908 /* Undo the level for the parms (from start_method).
11909 This is like poplevel, but it causes nothing to be
11910 saved. Saving information here confuses symbol-table
11911 output routines. Besides, this information will
11912 be correctly output when this method is actually
11915 /* Clear out the meanings of the local variables of this level;
11916 also record in each decl which block it belongs to. */
11918 for (link
= current_binding_level
->names
; link
; link
= TREE_CHAIN (link
))
11920 if (DECL_NAME (link
) != NULL_TREE
)
11921 pop_binding (DECL_NAME (link
), link
);
11922 gcc_assert (TREE_CODE (link
) != FUNCTION_DECL
);
11923 DECL_CONTEXT (link
) = NULL_TREE
;
11926 poplevel (0, 0, 0);
11928 DECL_INITIAL (fndecl
) = old_initial
;
11930 /* We used to check if the context of FNDECL was different from
11931 current_class_type as another way to get inside here. This didn't work
11932 for String.cc in libg++. */
11933 if (DECL_FRIEND_P (fndecl
))
11935 VEC_safe_push (tree
, gc
, CLASSTYPE_INLINE_FRIENDS (current_class_type
),
11937 decl
= void_type_node
;
11944 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11945 we can lay it out later, when and if its type becomes complete. */
11948 maybe_register_incomplete_var (tree var
)
11950 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
11952 /* Keep track of variables with incomplete types. */
11953 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
11954 && DECL_EXTERNAL (var
))
11956 tree inner_type
= TREE_TYPE (var
);
11958 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
11959 inner_type
= TREE_TYPE (inner_type
);
11960 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
11962 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
11963 /* RTTI TD entries are created while defining the type_info. */
11964 || (TYPE_LANG_SPECIFIC (inner_type
)
11965 && TYPE_BEING_DEFINED (inner_type
)))
11966 incomplete_vars
= tree_cons (inner_type
, var
, incomplete_vars
);
11970 /* Called when a class type (given by TYPE) is defined. If there are
11971 any existing VAR_DECLs whose type hsa been completed by this
11972 declaration, update them now. */
11975 complete_vars (tree type
)
11977 tree
*list
= &incomplete_vars
;
11979 gcc_assert (CLASS_TYPE_P (type
));
11982 if (same_type_p (type
, TREE_PURPOSE (*list
)))
11984 tree var
= TREE_VALUE (*list
);
11985 tree type
= TREE_TYPE (var
);
11986 /* Complete the type of the variable. The VAR_DECL itself
11987 will be laid out in expand_expr. */
11988 complete_type (type
);
11989 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
11990 /* Remove this entry from the list. */
11991 *list
= TREE_CHAIN (*list
);
11994 list
= &TREE_CHAIN (*list
);
11997 /* Check for pending declarations which may have abstract type. */
11998 complete_type_check_abstract (type
);
12001 /* If DECL is of a type which needs a cleanup, build and return an
12002 expression to perform that cleanup here. Return NULL_TREE if no
12003 cleanup need be done. */
12006 cxx_maybe_build_cleanup (tree decl
)
12012 /* Assume no cleanup is required. */
12013 cleanup
= NULL_TREE
;
12015 if (error_operand_p (decl
))
12018 /* Handle "__attribute__((cleanup))". We run the cleanup function
12019 before the destructor since the destructor is what actually
12020 terminates the lifetime of the object. */
12021 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
12028 /* Get the name specified by the user for the cleanup function. */
12029 id
= TREE_VALUE (TREE_VALUE (attr
));
12030 /* Look up the name to find the cleanup function to call. It is
12031 important to use lookup_name here because that is what is
12032 used in c-common.c:handle_cleanup_attribute when performing
12033 initial checks on the attribute. Note that those checks
12034 include ensuring that the function found is not an overloaded
12035 function, or an object with an overloaded call operator,
12036 etc.; we can rely on the fact that the functionfound is an
12037 ordinary FUNCTION_DECL. */
12038 fn
= lookup_name (id
);
12039 arg
= build_address (decl
);
12041 cleanup
= build_function_call (fn
, build_tree_list (NULL_TREE
,
12044 /* Handle ordinary C++ destructors. */
12045 type
= TREE_TYPE (decl
);
12046 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
12048 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
12049 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
12050 && CLASSTYPE_VBASECLASSES (type
));
12054 if (TREE_CODE (type
) == ARRAY_TYPE
)
12058 cxx_mark_addressable (decl
);
12059 addr
= build_unary_op (ADDR_EXPR
, decl
, 0);
12062 /* Optimize for space over speed here. */
12063 if (!has_vbases
|| flag_expensive_optimizations
)
12064 flags
|= LOOKUP_NONVIRTUAL
;
12066 call
= build_delete (TREE_TYPE (addr
), addr
,
12067 sfk_complete_destructor
, flags
, 0);
12069 cleanup
= build_compound_expr (cleanup
, call
);
12077 /* When a stmt has been parsed, this function is called. */
12084 /* DECL was originally constructed as a non-static member function,
12085 but turned out to be static. Update it accordingly. */
12088 revert_static_member_fn (tree decl
)
12091 tree function
= TREE_TYPE (decl
);
12092 tree args
= TYPE_ARG_TYPES (function
);
12094 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args
)))
12095 != TYPE_UNQUALIFIED
)
12096 error ("static member function %q#D declared with type qualifiers", decl
);
12098 args
= TREE_CHAIN (args
);
12099 tmp
= build_function_type (TREE_TYPE (function
), args
);
12100 tmp
= build_qualified_type (tmp
, cp_type_quals (function
));
12101 tmp
= build_exception_variant (tmp
,
12102 TYPE_RAISES_EXCEPTIONS (function
));
12103 TREE_TYPE (decl
) = tmp
;
12104 if (DECL_ARGUMENTS (decl
))
12105 DECL_ARGUMENTS (decl
) = TREE_CHAIN (DECL_ARGUMENTS (decl
));
12106 DECL_STATIC_FUNCTION_P (decl
) = 1;
12109 /* Initialize the variables used during compilation of a C++
12113 cxx_push_function_context (struct function
* f
)
12115 struct language_function
*p
= GGC_CNEW (struct language_function
);
12118 /* Whenever we start a new function, we destroy temporaries in the
12120 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
12126 if (DECL_SAVED_FUNCTION_DATA (fn
))
12128 /* If we already parsed this function, and we're just expanding it
12129 now, restore saved state. */
12130 *cp_function_chain
= *DECL_SAVED_FUNCTION_DATA (fn
);
12132 /* We don't need the saved data anymore. Unless this is an inline
12133 function; we need the named return value info for
12134 declare_return_variable. */
12135 if (! DECL_INLINE (fn
))
12136 DECL_SAVED_FUNCTION_DATA (fn
) = NULL
;
12141 /* Free the language-specific parts of F, now that we've finished
12142 compiling the function. */
12145 cxx_pop_function_context (struct function
* f
)
12150 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12151 one of the language-independent trees. */
12153 enum cp_tree_node_structure_enum
12154 cp_tree_node_structure (union lang_tree_node
* t
)
12156 switch (TREE_CODE (&t
->generic
))
12158 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
12159 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
12160 case OVERLOAD
: return TS_CP_OVERLOAD
;
12161 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
12162 case PTRMEM_CST
: return TS_CP_PTRMEM
;
12163 case BASELINK
: return TS_CP_BASELINK
;
12164 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
12165 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
12166 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
12167 default: return TS_CP_GENERIC
;
12171 /* Build the void_list_node (void_type_node having been created). */
12173 build_void_list_node (void)
12175 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
12180 cp_missing_noreturn_ok_p (tree decl
)
12182 /* A missing noreturn is ok for the `main' function. */
12183 return DECL_MAIN_P (decl
);
12186 /* Return the COMDAT group into which DECL should be placed. */
12189 cxx_comdat_group (tree decl
)
12193 /* Virtual tables, construction virtual tables, and virtual table
12194 tables all go in a single COMDAT group, named after the primary
12196 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
12197 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
12198 /* For all other DECLs, the COMDAT group is the mangled name of the
12199 declaration itself. */
12202 while (DECL_THUNK_P (decl
))
12204 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12205 into the same section as the target function. In that case
12206 we must return target's name. */
12207 tree target
= THUNK_TARGET (decl
);
12208 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
12209 && DECL_SECTION_NAME (target
) != NULL
12210 && DECL_ONE_ONLY (target
))
12215 name
= DECL_ASSEMBLER_NAME (decl
);
12218 return IDENTIFIER_POINTER (name
);
12221 #include "gt-cp-decl.h"