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 /* Whether or not the builtin can throw exceptions has no
1284 bearing on this declarator. */
1285 TREE_NOTHROW (olddecl
) = 0;
1287 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1289 /* If a builtin function is redeclared as `static', merge
1290 the declarations, but make the original one static. */
1291 DECL_THIS_STATIC (olddecl
) = 1;
1292 TREE_PUBLIC (olddecl
) = 0;
1294 /* Make the old declaration consistent with the new one so
1295 that all remnants of the builtin-ness of this function
1296 will be banished. */
1297 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1298 COPY_DECL_RTL (newdecl
, olddecl
);
1301 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1303 /* C++ Standard, 3.3, clause 4:
1304 "[Note: a namespace name or a class template name must be unique
1305 in its declarative region (7.3.2, clause 14). ]" */
1306 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1307 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1308 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1309 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1310 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1311 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1313 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1314 && TREE_CODE (newdecl
) != TYPE_DECL
)
1315 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1316 && TREE_CODE (olddecl
) != TYPE_DECL
))
1318 /* We do nothing special here, because C++ does such nasty
1319 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1320 get shadowed, and know that if we need to find a TYPE_DECL
1321 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1322 slot of the identifier. */
1326 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1327 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1328 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1329 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1333 error ("%q#D redeclared as different kind of symbol", newdecl
);
1334 if (TREE_CODE (olddecl
) == TREE_LIST
)
1335 olddecl
= TREE_VALUE (olddecl
);
1336 error ("previous declaration of %q+#D", olddecl
);
1338 return error_mark_node
;
1340 else if (!types_match
)
1342 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1343 /* These are certainly not duplicate declarations; they're
1344 from different scopes. */
1347 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1349 /* The name of a class template may not be declared to refer to
1350 any other template, class, function, object, namespace, value,
1351 or type in the same scope. */
1352 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1353 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1355 error ("declaration of template %q#D", newdecl
);
1356 error ("conflicts with previous declaration %q+#D", olddecl
);
1358 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1359 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1360 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1361 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1362 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1363 DECL_TEMPLATE_PARMS (olddecl
))
1364 /* Template functions can be disambiguated by
1366 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1367 TREE_TYPE (TREE_TYPE (olddecl
))))
1369 error ("new declaration %q#D", newdecl
);
1370 error ("ambiguates old declaration %q+#D", olddecl
);
1374 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1376 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1378 error ("declaration of C function %q#D conflicts with",
1380 error ("previous declaration %q+#D here", olddecl
);
1382 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1383 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1385 error ("new declaration %q#D", newdecl
);
1386 error ("ambiguates old declaration %q+#D", olddecl
);
1387 return error_mark_node
;
1394 error ("conflicting declaration %q#D", newdecl
);
1395 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1396 return error_mark_node
;
1399 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1400 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1401 && (!DECL_TEMPLATE_INFO (newdecl
)
1402 || (DECL_TI_TEMPLATE (newdecl
)
1403 != DECL_TI_TEMPLATE (olddecl
))))
1404 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1405 && (!DECL_TEMPLATE_INFO (olddecl
)
1406 || (DECL_TI_TEMPLATE (olddecl
)
1407 != DECL_TI_TEMPLATE (newdecl
))))))
1408 /* It's OK to have a template specialization and a non-template
1409 with the same type, or to have specializations of two
1410 different templates with the same type. Note that if one is a
1411 specialization, and the other is an instantiation of the same
1412 template, that we do not exit at this point. That situation
1413 can occur if we instantiate a template class, and then
1414 specialize one of its methods. This situation is valid, but
1415 the declarations must be merged in the usual way. */
1417 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1418 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1419 && !DECL_USE_TEMPLATE (newdecl
))
1420 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1421 && !DECL_USE_TEMPLATE (olddecl
))))
1422 /* One of the declarations is a template instantiation, and the
1423 other is not a template at all. That's OK. */
1425 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1427 /* In [namespace.alias] we have:
1429 In a declarative region, a namespace-alias-definition can be
1430 used to redefine a namespace-alias declared in that declarative
1431 region to refer only to the namespace to which it already
1434 Therefore, if we encounter a second alias directive for the same
1435 alias, we can just ignore the second directive. */
1436 if (DECL_NAMESPACE_ALIAS (newdecl
)
1437 && (DECL_NAMESPACE_ALIAS (newdecl
)
1438 == DECL_NAMESPACE_ALIAS (olddecl
)))
1440 /* [namespace.alias]
1442 A namespace-name or namespace-alias shall not be declared as
1443 the name of any other entity in the same declarative region.
1444 A namespace-name defined at global scope shall not be
1445 declared as the name of any other entity in any global scope
1447 error ("declaration of namespace %qD conflicts with", newdecl
);
1448 error ("previous declaration of namespace %q+D here", olddecl
);
1449 return error_mark_node
;
1453 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1456 error (errmsg
, newdecl
);
1457 if (DECL_NAME (olddecl
) != NULL_TREE
)
1458 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1459 ? "%q+#D previously defined here"
1460 : "%q+#D previously declared here", olddecl
);
1461 return error_mark_node
;
1463 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1464 && DECL_INITIAL (olddecl
) != NULL_TREE
1465 && TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) == NULL_TREE
1466 && TYPE_ARG_TYPES (TREE_TYPE (newdecl
)) != NULL_TREE
)
1468 /* Prototype decl follows defn w/o prototype. */
1469 warning (0, "prototype for %q+#D", newdecl
);
1470 warning (0, "%Jfollows non-prototype definition here", olddecl
);
1472 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1473 || TREE_CODE (olddecl
) == VAR_DECL
)
1474 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1477 If two declarations of the same function or object
1478 specify different linkage-specifications ..., the program
1479 is ill-formed.... Except for functions with C++ linkage,
1480 a function declaration without a linkage specification
1481 shall not precede the first linkage specification for
1482 that function. A function can be declared without a
1483 linkage specification after an explicit linkage
1484 specification has been seen; the linkage explicitly
1485 specified in the earlier declaration is not affected by
1486 such a function declaration.
1488 DR 563 raises the question why the restrictions on
1489 functions should not also apply to objects. Older
1490 versions of G++ silently ignore the linkage-specification
1498 which is clearly wrong. Therefore, we now treat objects
1500 if (current_lang_depth () == 0)
1502 /* There is no explicit linkage-specification, so we use
1503 the linkage from the previous declaration. */
1504 if (!DECL_LANG_SPECIFIC (newdecl
))
1505 retrofit_lang_decl (newdecl
);
1506 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1510 error ("previous declaration of %q+#D with %qL linkage",
1511 olddecl
, DECL_LANGUAGE (olddecl
));
1512 error ("conflicts with new declaration with %qL linkage",
1513 DECL_LANGUAGE (newdecl
));
1517 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1519 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1521 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1522 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1525 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1526 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1528 for (; t1
&& t1
!= void_list_node
;
1529 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1530 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1532 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1535 pedwarn ("default argument given for parameter %d of %q#D",
1537 pedwarn ("after previous specification in %q+#D", olddecl
);
1541 error ("default argument given for parameter %d of %q#D",
1543 error ("after previous specification in %q+#D",
1548 if (DECL_DECLARED_INLINE_P (newdecl
)
1549 && ! DECL_DECLARED_INLINE_P (olddecl
)
1550 && TREE_ADDRESSABLE (olddecl
) && warn_inline
)
1552 warning (0, "%q#D was used before it was declared inline", newdecl
);
1553 warning (0, "%Jprevious non-inline declaration here", olddecl
);
1558 /* Do not merge an implicit typedef with an explicit one. In:
1562 typedef class A A __attribute__ ((foo));
1564 the attribute should apply only to the typedef. */
1565 if (TREE_CODE (olddecl
) == TYPE_DECL
1566 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1567 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1570 /* If new decl is `static' and an `extern' was seen previously,
1572 warn_extern_redeclared_static (newdecl
, olddecl
);
1574 /* We have committed to returning 1 at this point. */
1575 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1577 /* Now that functions must hold information normally held
1578 by field decls, there is extra work to do so that
1579 declaration information does not get destroyed during
1581 if (DECL_VINDEX (olddecl
))
1582 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1583 if (DECL_CONTEXT (olddecl
))
1584 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1585 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1586 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1587 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1588 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1589 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1590 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1591 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1592 SET_OVERLOADED_OPERATOR_CODE
1593 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1594 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1596 /* Optionally warn about more than one declaration for the same
1597 name, but don't warn about a function declaration followed by a
1599 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1600 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1601 /* Don't warn about extern decl followed by definition. */
1602 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1603 /* Don't warn about friends, let add_friend take care of it. */
1604 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
)))
1606 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1607 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1611 /* Deal with C++: must preserve virtual function table size. */
1612 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1614 tree newtype
= TREE_TYPE (newdecl
);
1615 tree oldtype
= TREE_TYPE (olddecl
);
1617 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1618 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1619 CLASSTYPE_FRIEND_CLASSES (newtype
)
1620 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1622 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1625 /* Copy all the DECL_... slots specified in the new decl
1626 except for any that we copy here from the old type. */
1627 DECL_ATTRIBUTES (newdecl
)
1628 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1630 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1634 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1635 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1636 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1637 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1638 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1639 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1641 DECL_ATTRIBUTES (old_result
)
1642 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1644 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1646 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1647 && DECL_INITIAL (new_result
))
1649 if (DECL_INITIAL (old_result
))
1651 DECL_INLINE (old_result
) = 0;
1652 DECL_UNINLINABLE (old_result
) = 1;
1656 DECL_INLINE (old_result
) = DECL_INLINE (new_result
);
1657 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1659 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1660 DECL_NOT_REALLY_EXTERN (old_result
)
1661 = DECL_NOT_REALLY_EXTERN (new_result
);
1662 DECL_INTERFACE_KNOWN (old_result
)
1663 = DECL_INTERFACE_KNOWN (new_result
);
1664 DECL_DECLARED_INLINE_P (old_result
)
1665 = DECL_DECLARED_INLINE_P (new_result
);
1669 DECL_INLINE (old_result
)
1670 |= DECL_INLINE (new_result
);
1671 DECL_DECLARED_INLINE_P (old_result
)
1672 |= DECL_DECLARED_INLINE_P (new_result
);
1673 check_redeclaration_exception_specification (newdecl
, olddecl
);
1677 /* If the new declaration is a definition, update the file and
1678 line information on the declaration, and also make
1679 the old declaration the same definition. */
1680 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1682 DECL_SOURCE_LOCATION (olddecl
)
1683 = DECL_SOURCE_LOCATION (old_result
)
1684 = DECL_SOURCE_LOCATION (newdecl
);
1685 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1686 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1687 DECL_ARGUMENTS (old_result
)
1688 = DECL_ARGUMENTS (new_result
);
1696 /* Automatically handles default parameters. */
1697 tree oldtype
= TREE_TYPE (olddecl
);
1700 /* Merge the data types specified in the two decls. */
1701 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1703 /* If merge_types produces a non-typedef type, just use the old type. */
1704 if (TREE_CODE (newdecl
) == TYPE_DECL
1705 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1708 if (TREE_CODE (newdecl
) == VAR_DECL
)
1710 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1711 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1712 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1713 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1714 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1715 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1717 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1718 if (DECL_LANG_SPECIFIC (olddecl
)
1719 && CP_DECL_THREADPRIVATE_P (olddecl
))
1721 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1722 if (!DECL_LANG_SPECIFIC (newdecl
))
1723 retrofit_lang_decl (newdecl
);
1725 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1726 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1730 /* Do this after calling `merge_types' so that default
1731 parameters don't confuse us. */
1732 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1733 check_redeclaration_exception_specification (newdecl
, olddecl
);
1734 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1736 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1737 check_default_args (newdecl
);
1739 /* Lay the type out, unless already done. */
1740 if (! same_type_p (newtype
, oldtype
)
1741 && TREE_TYPE (newdecl
) != error_mark_node
1742 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1743 layout_type (TREE_TYPE (newdecl
));
1745 if ((TREE_CODE (newdecl
) == VAR_DECL
1746 || TREE_CODE (newdecl
) == PARM_DECL
1747 || TREE_CODE (newdecl
) == RESULT_DECL
1748 || TREE_CODE (newdecl
) == FIELD_DECL
1749 || TREE_CODE (newdecl
) == TYPE_DECL
)
1750 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1751 layout_decl (newdecl
, 0);
1753 /* Merge the type qualifiers. */
1754 if (TREE_READONLY (newdecl
))
1755 TREE_READONLY (olddecl
) = 1;
1756 if (TREE_THIS_VOLATILE (newdecl
))
1757 TREE_THIS_VOLATILE (olddecl
) = 1;
1758 if (TREE_NOTHROW (newdecl
))
1759 TREE_NOTHROW (olddecl
) = 1;
1761 /* Merge deprecatedness. */
1762 if (TREE_DEPRECATED (newdecl
))
1763 TREE_DEPRECATED (olddecl
) = 1;
1765 /* Merge the initialization information. */
1766 if (DECL_INITIAL (newdecl
) == NULL_TREE
1767 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1769 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1770 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1771 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl
)
1772 && DECL_LANG_SPECIFIC (newdecl
)
1773 && DECL_LANG_SPECIFIC (olddecl
))
1775 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1776 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1780 /* Merge the section attribute.
1781 We want to issue an error if the sections conflict but that must be
1782 done later in decl_attributes since we are called before attributes
1784 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1785 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1787 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1789 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1790 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1791 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1792 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1793 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1794 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1795 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1796 DECL_IS_PURE (newdecl
) |= DECL_IS_PURE (olddecl
);
1797 /* Keep the old RTL. */
1798 COPY_DECL_RTL (olddecl
, newdecl
);
1800 else if (TREE_CODE (newdecl
) == VAR_DECL
1801 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1803 /* Keep the old RTL. We cannot keep the old RTL if the old
1804 declaration was for an incomplete object and the new
1805 declaration is not since many attributes of the RTL will
1807 COPY_DECL_RTL (olddecl
, newdecl
);
1810 /* If cannot merge, then use the new type and qualifiers,
1811 and don't preserve the old rtl. */
1814 /* Clean out any memory we had of the old declaration. */
1815 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1817 TREE_VALUE (oldstatic
) = error_mark_node
;
1819 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1820 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1821 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1822 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1825 /* Merge the storage class information. */
1826 merge_weak (newdecl
, olddecl
);
1828 DECL_ONE_ONLY (newdecl
) |= DECL_ONE_ONLY (olddecl
);
1829 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1830 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1831 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1832 if (! DECL_EXTERNAL (olddecl
))
1833 DECL_EXTERNAL (newdecl
) = 0;
1835 new_template
= NULL_TREE
;
1836 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1838 bool old_decl_gnu_inline
;
1840 if ((DECL_INTERFACE_KNOWN (olddecl
)
1841 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
1842 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
1843 && TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
))
1847 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
1848 fn
= DECL_TEMPLATE_RESULT (olddecl
);
1850 old_decl_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
1853 old_decl_gnu_inline
= false;
1855 if (!old_decl_gnu_inline
)
1857 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1858 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1859 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1860 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1862 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1863 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1865 /* If the OLDDECL is an instantiation and/or specialization,
1866 then the NEWDECL must be too. But, it may not yet be marked
1867 as such if the caller has created NEWDECL, but has not yet
1868 figured out that it is a redeclaration. */
1869 if (!DECL_USE_TEMPLATE (newdecl
))
1870 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
1872 /* Don't really know how much of the language-specific
1873 values we should copy from old to new. */
1874 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
1875 DECL_LANG_SPECIFIC (newdecl
)->decl_flags
.u2
=
1876 DECL_LANG_SPECIFIC (olddecl
)->decl_flags
.u2
;
1877 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
1878 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
1879 if (DECL_TEMPLATE_INFO (newdecl
))
1880 new_template
= DECL_TI_TEMPLATE (newdecl
);
1881 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
1882 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
1883 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
1884 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1885 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1886 && DECL_HIDDEN_FRIEND_P (olddecl
)
1887 && newdecl_is_friend
);
1889 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1890 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1891 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
1893 DECL_BEFRIENDING_CLASSES (newdecl
)
1894 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
1895 DECL_BEFRIENDING_CLASSES (olddecl
));
1896 /* DECL_THUNKS is only valid for virtual functions,
1897 otherwise it is a DECL_FRIEND_CONTEXT. */
1898 if (DECL_VIRTUAL_P (newdecl
))
1899 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
1903 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1905 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
1906 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
1908 /* If newdecl is not a specialization, then it is not a
1909 template-related function at all. And that means that we
1910 should have exited above, returning 0. */
1911 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
1913 if (TREE_USED (olddecl
))
1914 /* From [temp.expl.spec]:
1916 If a template, a member template or the member of a class
1917 template is explicitly specialized then that
1918 specialization shall be declared before the first use of
1919 that specialization that would cause an implicit
1920 instantiation to take place, in every translation unit in
1921 which such a use occurs. */
1922 error ("explicit specialization of %qD after first use",
1925 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
1927 /* Don't propagate visibility from the template to the
1928 specialization here. We'll do that in determine_visibility if
1930 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
1932 /* [temp.expl.spec/14] We don't inline explicit specialization
1933 just because the primary template says so. */
1935 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
1937 /* C++ is always in in unit-at-a-time mode, so we never
1938 inline re-defined extern inline functions. */
1939 DECL_INLINE (newdecl
) = 0;
1940 DECL_UNINLINABLE (newdecl
) = 1;
1944 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
1945 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
1947 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
1949 /* If either decl says `inline', this fn is inline, unless
1950 its definition was passed already. */
1951 if (DECL_INLINE (newdecl
) && DECL_INITIAL (olddecl
) == NULL_TREE
)
1952 DECL_INLINE (olddecl
) = 1;
1953 DECL_INLINE (newdecl
) = DECL_INLINE (olddecl
);
1955 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
1956 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
1958 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
1959 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
1960 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
1961 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
1964 /* Preserve abstractness on cloned [cd]tors. */
1965 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
1969 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1970 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
1971 COPY_DECL_RTL (newdecl
, olddecl
);
1973 if (! types_match
|| new_defines_function
)
1975 /* These need to be copied so that the names are available.
1976 Note that if the types do match, we'll preserve inline
1977 info and other bits, but if not, we won't. */
1978 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
1979 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
1981 if (new_defines_function
)
1982 /* If defining a function declared with other language
1983 linkage, use the previously declared language linkage. */
1984 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1985 else if (types_match
)
1987 /* If redeclaring a builtin function, and not a definition,
1988 it stays built in. */
1989 if (DECL_BUILT_IN (olddecl
))
1991 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
1992 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
1993 /* If we're keeping the built-in definition, keep the rtl,
1994 regardless of declaration matches. */
1995 COPY_DECL_RTL (olddecl
, newdecl
);
1998 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
1999 /* Don't clear out the arguments if we're redefining a function. */
2000 if (DECL_ARGUMENTS (olddecl
))
2001 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2004 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2005 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2007 /* Now preserve various other info from the definition. */
2008 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2009 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2010 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2011 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2013 /* Warn about conflicting visibility specifications. */
2014 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2015 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2016 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2018 warning (OPT_Wattributes
, "%q+D: visibility attribute ignored "
2019 "because it", newdecl
);
2020 warning (OPT_Wattributes
, "%Jconflicts with previous "
2021 "declaration here", olddecl
);
2023 /* Choose the declaration which specified visibility. */
2024 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2026 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2027 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2029 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2030 so keep this behavior. */
2031 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
2033 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2034 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2037 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2038 with that from NEWDECL below. */
2039 if (DECL_LANG_SPECIFIC (olddecl
))
2041 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2042 != DECL_LANG_SPECIFIC (newdecl
));
2043 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2046 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2050 function_size
= sizeof (struct tree_decl_common
);
2052 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2053 (char *) newdecl
+ sizeof (struct tree_common
),
2054 function_size
- sizeof (struct tree_common
));
2056 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2057 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2058 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2060 /* If newdecl is a template instantiation, it is possible that
2061 the following sequence of events has occurred:
2063 o A friend function was declared in a class template. The
2064 class template was instantiated.
2066 o The instantiation of the friend declaration was
2067 recorded on the instantiation list, and is newdecl.
2069 o Later, however, instantiate_class_template called pushdecl
2070 on the newdecl to perform name injection. But, pushdecl in
2071 turn called duplicate_decls when it discovered that another
2072 declaration of a global function with the same name already
2075 o Here, in duplicate_decls, we decided to clobber newdecl.
2077 If we're going to do that, we'd better make sure that
2078 olddecl, and not newdecl, is on the list of
2079 instantiations so that if we try to do the instantiation
2080 again we won't get the clobbered declaration. */
2081 reregister_specialization (newdecl
,
2087 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2088 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2089 (char *) newdecl
+ sizeof (struct tree_common
),
2090 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2091 switch (TREE_CODE (olddecl
))
2101 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2102 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2103 size
- sizeof (struct tree_decl_common
)
2104 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2108 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2109 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2110 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2111 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2115 DECL_UID (olddecl
) = olddecl_uid
;
2117 DECL_FRIEND_P (olddecl
) = 1;
2120 DECL_ANTICIPATED (olddecl
) = 1;
2121 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2124 /* NEWDECL contains the merged attribute lists.
2125 Update OLDDECL to be the same. */
2126 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2128 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2129 so that encode_section_info has a chance to look at the new decl
2130 flags and attributes. */
2131 if (DECL_RTL_SET_P (olddecl
)
2132 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2133 || (TREE_CODE (olddecl
) == VAR_DECL
2134 && TREE_STATIC (olddecl
))))
2135 make_decl_rtl (olddecl
);
2137 /* The NEWDECL will no longer be needed. Because every out-of-class
2138 declaration of a member results in a call to duplicate_decls,
2139 freeing these nodes represents in a significant savings. */
2145 /* Return zero if the declaration NEWDECL is valid
2146 when the declaration OLDDECL (assumed to be for the same name)
2147 has already been seen.
2148 Otherwise return an error message format string with a %s
2149 where the identifier should go. */
2152 redeclaration_error_message (tree newdecl
, tree olddecl
)
2154 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2156 /* Because C++ can put things into name space for free,
2157 constructs like "typedef struct foo { ... } foo"
2158 would look like an erroneous redeclaration. */
2159 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2162 return "redefinition of %q#D";
2164 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2166 /* If this is a pure function, its olddecl will actually be
2167 the original initialization to `0' (which we force to call
2168 abort()). Don't complain about redefinition in this case. */
2169 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2170 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2173 /* If both functions come from different namespaces, this is not
2174 a redeclaration - this is a conflict with a used function. */
2175 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2176 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2177 && ! decls_match (olddecl
, newdecl
))
2178 return "%qD conflicts with used function";
2180 /* We'll complain about linkage mismatches in
2181 warn_extern_redeclared_static. */
2183 /* Defining the same name twice is no good. */
2184 if (DECL_INITIAL (olddecl
) != NULL_TREE
2185 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2187 if (DECL_NAME (olddecl
) == NULL_TREE
)
2188 return "%q#D not declared in class";
2189 else if (!GNU_INLINE_P (olddecl
)
2190 || GNU_INLINE_P (newdecl
))
2191 return "redefinition of %q#D";
2194 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2196 bool olda
= GNU_INLINE_P (olddecl
);
2197 bool newa
= GNU_INLINE_P (newdecl
);
2202 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2204 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2210 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2214 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2216 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2217 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2218 return "redefinition of %q#D";
2222 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2223 || (DECL_TEMPLATE_RESULT (newdecl
)
2224 == DECL_TEMPLATE_RESULT (olddecl
)))
2227 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2228 if (DECL_TEMPLATE_INFO (nt
))
2229 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2230 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2231 if (DECL_TEMPLATE_INFO (ot
))
2232 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2233 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2234 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2235 return "redefinition of %q#D";
2237 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2239 bool olda
= GNU_INLINE_P (ot
);
2240 bool newa
= GNU_INLINE_P (nt
);
2245 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2247 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2251 /* Core issue #226 (C++0x):
2253 If a friend function template declaration specifies a
2254 default template-argument, that declaration shall be a
2255 definition and shall be the only declaration of the
2256 function template in the translation unit. */
2257 if ((cxx_dialect
!= cxx98
)
2258 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2259 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2260 /*is_primary=*/1, /*is_partial=*/0,
2261 /*is_friend_decl=*/2))
2262 return "redeclaration of friend %q#D may not have default template arguments";
2266 else if (TREE_CODE (newdecl
) == VAR_DECL
2267 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2268 && (! DECL_LANG_SPECIFIC (olddecl
)
2269 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2270 || DECL_THREAD_LOCAL_P (newdecl
)))
2272 /* Only variables can be thread-local, and all declarations must
2273 agree on this property. */
2274 if (DECL_THREAD_LOCAL_P (newdecl
))
2275 return "thread-local declaration of %q#D follows "
2276 "non-thread-local declaration";
2278 return "non-thread-local declaration of %q#D follows "
2279 "thread-local declaration";
2281 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2283 /* The objects have been declared at namespace scope. If either
2284 is a member of an anonymous union, then this is an invalid
2285 redeclaration. For example:
2291 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2292 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2293 return "redeclaration of %q#D";
2294 /* If at least one declaration is a reference, there is no
2295 conflict. For example:
2301 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2303 /* Reject two definitions. */
2304 return "redefinition of %q#D";
2308 /* Objects declared with block scope: */
2309 /* Reject two definitions, and reject a definition
2310 together with an external reference. */
2311 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2312 return "redeclaration of %q#D";
2317 /* Hash and equality functions for the named_label table. */
2320 named_label_entry_hash (const void *data
)
2322 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2323 return DECL_UID (ent
->label_decl
);
2327 named_label_entry_eq (const void *a
, const void *b
)
2329 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2330 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2331 return ent_a
->label_decl
== ent_b
->label_decl
;
2334 /* Create a new label, named ID. */
2337 make_label_decl (tree id
, int local_p
)
2339 struct named_label_entry
*ent
;
2343 decl
= build_decl (LABEL_DECL
, id
, void_type_node
);
2345 DECL_CONTEXT (decl
) = current_function_decl
;
2346 DECL_MODE (decl
) = VOIDmode
;
2347 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2349 /* Say where one reference is to the label, for the sake of the
2350 error if it is not defined. */
2351 DECL_SOURCE_LOCATION (decl
) = input_location
;
2353 /* Record the fact that this identifier is bound to this label. */
2354 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2356 /* Create the label htab for the function on demand. */
2358 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2359 named_label_entry_eq
, NULL
);
2361 /* Record this label on the list of labels used in this function.
2362 We do this before calling make_label_decl so that we get the
2363 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2364 ent
= GGC_CNEW (struct named_label_entry
);
2365 ent
->label_decl
= decl
;
2367 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2368 gcc_assert (*slot
== NULL
);
2374 /* Look for a label named ID in the current function. If one cannot
2375 be found, create one. (We keep track of used, but undefined,
2376 labels, and complain about them at the end of a function.) */
2379 lookup_label (tree id
)
2383 timevar_push (TV_NAME_LOOKUP
);
2384 /* You can't use labels at global scope. */
2385 if (current_function_decl
== NULL_TREE
)
2387 error ("label %qE referenced outside of any function", id
);
2388 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, NULL_TREE
);
2391 /* See if we've already got this label. */
2392 decl
= IDENTIFIER_LABEL_VALUE (id
);
2393 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2394 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2396 decl
= make_label_decl (id
, /*local_p=*/0);
2397 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2400 /* Declare a local label named ID. */
2403 declare_local_label (tree id
)
2407 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2408 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2409 shadow
= tree_cons (IDENTIFIER_LABEL_VALUE (id
), NULL_TREE
,
2410 current_binding_level
->shadowed_labels
);
2411 current_binding_level
->shadowed_labels
= shadow
;
2413 decl
= make_label_decl (id
, /*local_p=*/1);
2414 TREE_VALUE (shadow
) = decl
;
2419 /* Returns nonzero if it is ill-formed to jump past the declaration of
2420 DECL. Returns 2 if it's also a real problem. */
2423 decl_jump_unsafe (tree decl
)
2425 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2426 || TREE_TYPE (decl
) == error_mark_node
)
2429 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
2430 || DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2433 if (pod_type_p (TREE_TYPE (decl
)))
2436 /* The POD stuff is just pedantry; why should it matter if the class
2437 contains a field of pointer to member type? */
2441 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2444 identify_goto (tree decl
, const location_t
*locus
)
2447 pedwarn ("jump to label %qD", decl
);
2449 pedwarn ("jump to case label");
2451 pedwarn ("%H from here", locus
);
2454 /* Check that a single previously seen jump to a newly defined label
2455 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2456 the jump context; NAMES are the names in scope in LEVEL at the jump
2457 context; LOCUS is the source position of the jump or 0. Returns
2458 true if all is well. */
2461 check_previous_goto_1 (tree decl
, struct cp_binding_level
* level
, tree names
,
2462 bool exited_omp
, const location_t
*locus
)
2464 struct cp_binding_level
*b
;
2465 bool identified
= false, saw_eh
= false, saw_omp
= false;
2469 identify_goto (decl
, locus
);
2470 error (" exits OpenMP structured block");
2471 identified
= saw_omp
= true;
2474 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2476 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2478 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2479 new_decls
= TREE_CHAIN (new_decls
))
2481 int problem
= decl_jump_unsafe (new_decls
);
2487 identify_goto (decl
, locus
);
2491 error (" crosses initialization of %q+#D", new_decls
);
2493 pedwarn (" enters scope of non-POD %q+#D", new_decls
);
2498 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2502 identify_goto (decl
, locus
);
2505 if (b
->kind
== sk_try
)
2506 error (" enters try block");
2508 error (" enters catch block");
2511 if (b
->kind
== sk_omp
&& !saw_omp
)
2515 identify_goto (decl
, locus
);
2518 error (" enters OpenMP structured block");
2527 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2529 check_previous_goto_1 (decl
, use
->binding_level
,
2530 use
->names_in_scope
, use
->in_omp_scope
,
2531 &use
->o_goto_locus
);
2535 check_switch_goto (struct cp_binding_level
* level
)
2537 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2540 /* Check that a new jump to a label DECL is OK. Called by
2541 finish_goto_stmt. */
2544 check_goto (tree decl
)
2546 struct named_label_entry
*ent
, dummy
;
2547 bool saw_catch
= false, identified
= false;
2550 /* We can't know where a computed goto is jumping.
2551 So we assume that it's OK. */
2552 if (TREE_CODE (decl
) != LABEL_DECL
)
2555 /* We didn't record any information about this label when we created it,
2556 and there's not much point since it's trivial to analyze as a return. */
2557 if (decl
== cdtor_label
)
2560 dummy
.label_decl
= decl
;
2561 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2562 gcc_assert (ent
!= NULL
);
2564 /* If the label hasn't been defined yet, defer checking. */
2565 if (! DECL_INITIAL (decl
))
2567 struct named_label_use_entry
*new_use
;
2569 /* Don't bother creating another use if the last goto had the
2570 same data, and will therefore create the same set of errors. */
2572 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2575 new_use
= GGC_NEW (struct named_label_use_entry
);
2576 new_use
->binding_level
= current_binding_level
;
2577 new_use
->names_in_scope
= current_binding_level
->names
;
2578 new_use
->o_goto_locus
= input_location
;
2579 new_use
->in_omp_scope
= false;
2581 new_use
->next
= ent
->uses
;
2582 ent
->uses
= new_use
;
2586 if (ent
->in_try_scope
|| ent
->in_catch_scope
2587 || ent
->in_omp_scope
|| ent
->bad_decls
)
2589 pedwarn ("jump to label %q+D", decl
);
2590 pedwarn (" from here");
2594 for (bad
= ent
->bad_decls
; bad
; bad
= TREE_CHAIN (bad
))
2596 tree b
= TREE_VALUE (bad
);
2597 int u
= decl_jump_unsafe (b
);
2599 if (u
> 1 && DECL_ARTIFICIAL (b
))
2601 /* Can't skip init of __exception_info. */
2602 error ("%J enters catch block", b
);
2606 error (" skips initialization of %q+#D", b
);
2608 pedwarn (" enters scope of non-POD %q+#D", b
);
2611 if (ent
->in_try_scope
)
2612 error (" enters try block");
2613 else if (ent
->in_catch_scope
&& !saw_catch
)
2614 error (" enters catch block");
2616 if (ent
->in_omp_scope
)
2617 error (" enters OpenMP structured block");
2618 else if (flag_openmp
)
2620 struct cp_binding_level
*b
;
2621 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2623 if (b
== ent
->binding_level
)
2625 if (b
->kind
== sk_omp
)
2629 pedwarn ("jump to label %q+D", decl
);
2630 pedwarn (" from here");
2633 error (" exits OpenMP structured block");
2640 /* Check that a return is ok wrt OpenMP structured blocks.
2641 Called by finish_return_stmt. Returns true if all is well. */
2644 check_omp_return (void)
2646 struct cp_binding_level
*b
;
2647 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2648 if (b
->kind
== sk_omp
)
2650 error ("invalid exit from OpenMP structured block");
2656 /* Define a label, specifying the location in the source file.
2657 Return the LABEL_DECL node for the label. */
2660 define_label (location_t location
, tree name
)
2662 struct named_label_entry
*ent
, dummy
;
2663 struct cp_binding_level
*p
;
2666 timevar_push (TV_NAME_LOOKUP
);
2668 decl
= lookup_label (name
);
2670 dummy
.label_decl
= decl
;
2671 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2672 gcc_assert (ent
!= NULL
);
2674 /* After labels, make any new cleanups in the function go into their
2675 own new (temporary) binding contour. */
2676 for (p
= current_binding_level
;
2677 p
->kind
!= sk_function_parms
;
2679 p
->more_cleanups_ok
= 0;
2681 if (name
== get_identifier ("wchar_t"))
2682 pedwarn ("label named wchar_t");
2684 if (DECL_INITIAL (decl
) != NULL_TREE
)
2686 error ("duplicate label %qD", decl
);
2687 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
2691 struct named_label_use_entry
*use
;
2693 /* Mark label as having been defined. */
2694 DECL_INITIAL (decl
) = error_mark_node
;
2695 /* Say where in the source. */
2696 DECL_SOURCE_LOCATION (decl
) = location
;
2698 ent
->binding_level
= current_binding_level
;
2699 ent
->names_in_scope
= current_binding_level
->names
;
2701 for (use
= ent
->uses
; use
; use
= use
->next
)
2702 check_previous_goto (decl
, use
);
2706 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2711 struct cp_binding_level
*level
;
2712 struct cp_switch
*next
;
2713 /* The SWITCH_STMT being built. */
2715 /* A splay-tree mapping the low element of a case range to the high
2716 element, or NULL_TREE if there is no high element. Used to
2717 determine whether or not a new case label duplicates an old case
2718 label. We need a tree, rather than simply a hash table, because
2719 of the GNU case range extension. */
2723 /* A stack of the currently active switch statements. The innermost
2724 switch statement is on the top of the stack. There is no need to
2725 mark the stack for garbage collection because it is only active
2726 during the processing of the body of a function, and we never
2727 collect at that point. */
2729 static struct cp_switch
*switch_stack
;
2731 /* Called right after a switch-statement condition is parsed.
2732 SWITCH_STMT is the switch statement being parsed. */
2735 push_switch (tree switch_stmt
)
2737 struct cp_switch
*p
= XNEW (struct cp_switch
);
2738 p
->level
= current_binding_level
;
2739 p
->next
= switch_stack
;
2740 p
->switch_stmt
= switch_stmt
;
2741 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2748 struct cp_switch
*cs
= switch_stack
;
2749 location_t switch_location
;
2751 /* Emit warnings as needed. */
2752 if (EXPR_HAS_LOCATION (cs
->switch_stmt
))
2753 switch_location
= EXPR_LOCATION (cs
->switch_stmt
);
2755 switch_location
= input_location
;
2756 if (!processing_template_decl
)
2757 c_do_switch_warnings (cs
->cases
, switch_location
,
2758 SWITCH_STMT_TYPE (cs
->switch_stmt
),
2759 SWITCH_STMT_COND (cs
->switch_stmt
));
2761 splay_tree_delete (cs
->cases
);
2762 switch_stack
= switch_stack
->next
;
2766 /* Note that we've seen a definition of a case label, and complain if this
2767 is a bad place for one. */
2770 finish_case_label (tree low_value
, tree high_value
)
2773 struct cp_binding_level
*p
;
2775 if (processing_template_decl
)
2779 /* For templates, just add the case label; we'll do semantic
2780 analysis at instantiation-time. */
2781 label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2782 return add_stmt (build_case_label (low_value
, high_value
, label
));
2785 /* Find the condition on which this switch statement depends. */
2786 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
2787 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
2788 cond
= TREE_VALUE (cond
);
2790 if (!check_switch_goto (switch_stack
->level
))
2791 return error_mark_node
;
2793 r
= c_add_case_label (switch_stack
->cases
, cond
, TREE_TYPE (cond
),
2794 low_value
, high_value
);
2796 /* After labels, make any new cleanups in the function go into their
2797 own new (temporary) binding contour. */
2798 for (p
= current_binding_level
;
2799 p
->kind
!= sk_function_parms
;
2801 p
->more_cleanups_ok
= 0;
2806 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2809 typename_hash (const void* k
)
2812 const_tree
const t
= (const_tree
) k
;
2814 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
2815 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
2820 typedef struct typename_info
{
2828 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2829 really of type `typename_info*' */
2832 typename_compare (const void * k1
, const void * k2
)
2834 const_tree
const t1
= (const_tree
) k1
;
2835 const typename_info
*const t2
= (const typename_info
*) k2
;
2837 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
2838 && TYPE_CONTEXT (t1
) == t2
->scope
2839 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
2840 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
2841 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
2844 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2845 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2847 Returns the new TYPENAME_TYPE. */
2849 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
2852 build_typename_type (tree context
, tree name
, tree fullname
,
2853 enum tag_types tag_type
)
2861 if (typename_htab
== NULL
)
2862 typename_htab
= htab_create_ggc (61, &typename_hash
,
2863 &typename_compare
, NULL
);
2865 ti
.scope
= FROB_CONTEXT (context
);
2867 ti
.template_id
= fullname
;
2868 ti
.enum_p
= tag_type
== enum_type
;
2869 ti
.class_p
= (tag_type
== class_type
2870 || tag_type
== record_type
2871 || tag_type
== union_type
);
2872 hash
= (htab_hash_pointer (ti
.scope
)
2873 ^ htab_hash_pointer (ti
.name
));
2875 /* See if we already have this type. */
2876 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
2881 /* Build the TYPENAME_TYPE. */
2882 t
= make_aggr_type (TYPENAME_TYPE
);
2883 TYPE_CONTEXT (t
) = ti
.scope
;
2884 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
2885 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
2886 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
2888 /* Build the corresponding TYPE_DECL. */
2889 d
= build_decl (TYPE_DECL
, name
, t
);
2890 TYPE_NAME (TREE_TYPE (d
)) = d
;
2891 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2892 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2893 DECL_ARTIFICIAL (d
) = 1;
2895 /* Store it in the hash table. */
2898 /* TYPENAME_TYPEs must always be compared structurally, because
2899 they may or may not resolve down to another type depending on
2900 the currently open classes. */
2901 SET_TYPE_STRUCTURAL_EQUALITY (t
);
2907 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2908 provided to name the type. Returns an appropriate type, unless an
2909 error occurs, in which case error_mark_node is returned. If we
2910 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2911 return that, rather than the _TYPE it corresponds to, in other
2912 cases we look through the type decl. If TF_ERROR is set, complain
2913 about errors, otherwise be quiet. */
2916 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
2917 tsubst_flags_t complain
)
2923 if (name
== error_mark_node
2924 || context
== NULL_TREE
2925 || context
== error_mark_node
)
2926 return error_mark_node
;
2930 if (!(TYPE_LANG_SPECIFIC (name
)
2931 && (CLASSTYPE_IS_TEMPLATE (name
)
2932 || CLASSTYPE_USE_TEMPLATE (name
))))
2933 name
= TYPE_IDENTIFIER (name
);
2935 /* Create a TEMPLATE_ID_EXPR for the type. */
2936 name
= build_nt (TEMPLATE_ID_EXPR
,
2937 CLASSTYPE_TI_TEMPLATE (name
),
2938 CLASSTYPE_TI_ARGS (name
));
2940 else if (TREE_CODE (name
) == TYPE_DECL
)
2941 name
= DECL_NAME (name
);
2945 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
2947 name
= TREE_OPERAND (name
, 0);
2948 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2949 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
2950 else if (TREE_CODE (name
) == OVERLOAD
)
2952 error ("%qD is not a type", name
);
2953 return error_mark_node
;
2956 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2958 error ("%qD used without template parameters", name
);
2959 return error_mark_node
;
2961 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
2962 gcc_assert (TYPE_P (context
));
2964 /* When the CONTEXT is a dependent type, NAME could refer to a
2965 dependent base class of CONTEXT. So we cannot peek inside it,
2966 even if CONTEXT is a currently open scope. */
2967 if (dependent_type_p (context
))
2968 return build_typename_type (context
, name
, fullname
, tag_type
);
2970 if (!IS_AGGR_TYPE (context
))
2972 if (complain
& tf_error
)
2973 error ("%q#T is not a class", context
);
2974 return error_mark_node
;
2977 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
2979 /* We should only set WANT_TYPE when we're a nested typename type.
2980 Then we can give better diagnostics if we find a non-type. */
2981 t
= lookup_field (context
, name
, 0, /*want_type=*/true);
2984 if (complain
& tf_error
)
2985 error (want_template
? "no class template named %q#T in %q#T"
2986 : "no type named %q#T in %q#T", name
, context
);
2987 return error_mark_node
;
2990 if (want_template
&& !DECL_CLASS_TEMPLATE_P (t
))
2992 if (complain
& tf_error
)
2993 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2995 return error_mark_node
;
2997 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
2999 if (complain
& tf_error
)
3000 error ("%<typename %T::%D%> names %q#T, which is not a type",
3002 return error_mark_node
;
3005 if (complain
& tf_error
)
3006 perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
);
3009 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3011 /*entering_scope=*/0,
3012 tf_warning_or_error
| tf_user
);
3014 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3020 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3021 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3022 in which case error_mark_node is returned.
3024 If PARM_LIST is non-NULL, also make sure that the template parameter
3025 list of TEMPLATE_DECL matches.
3027 If COMPLAIN zero, don't complain about any errors that occur. */
3030 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3031 tsubst_flags_t complain
)
3037 name
= TYPE_IDENTIFIER (name
);
3038 else if (DECL_P (name
))
3039 name
= DECL_NAME (name
);
3040 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3042 if (!dependent_type_p (context
)
3043 || currently_open_class (context
))
3045 tree tmpl
= NULL_TREE
;
3047 if (IS_AGGR_TYPE (context
))
3048 tmpl
= lookup_field (context
, name
, 0, false);
3050 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
3052 if (complain
& tf_error
)
3053 error ("no class template named %q#T in %q#T", name
, context
);
3054 return error_mark_node
;
3058 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3060 if (complain
& tf_error
)
3062 error ("template parameters do not match template");
3063 error ("%q+D declared here", tmpl
);
3065 return error_mark_node
;
3068 if (complain
& tf_error
)
3069 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
);
3074 /* Build the UNBOUND_CLASS_TEMPLATE. */
3075 t
= make_aggr_type (UNBOUND_CLASS_TEMPLATE
);
3076 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3077 TREE_TYPE (t
) = NULL_TREE
;
3078 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3080 /* Build the corresponding TEMPLATE_DECL. */
3081 d
= build_decl (TEMPLATE_DECL
, name
, t
);
3082 TYPE_NAME (TREE_TYPE (d
)) = d
;
3083 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3084 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3085 DECL_ARTIFICIAL (d
) = 1;
3086 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3093 /* Push the declarations of builtin types into the namespace.
3094 RID_INDEX is the index of the builtin type in the array
3095 RID_POINTERS. NAME is the name used when looking up the builtin
3096 type. TYPE is the _TYPE node for the builtin type. */
3099 record_builtin_type (enum rid rid_index
,
3103 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3104 tree tdecl
= NULL_TREE
;
3106 if ((int) rid_index
< (int) RID_MAX
)
3107 rname
= ridpointers
[(int) rid_index
];
3109 tname
= get_identifier (name
);
3111 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3112 eliminated. Built-in types should not be looked up name; their
3113 names are keywords that the parser can recognize. However, there
3114 is code in c-common.c that uses identifier_global_value to look
3115 up built-in types by name. */
3118 tdecl
= build_decl (TYPE_DECL
, tname
, type
);
3119 DECL_ARTIFICIAL (tdecl
) = 1;
3120 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3126 tdecl
= build_decl (TYPE_DECL
, rname
, type
);
3127 DECL_ARTIFICIAL (tdecl
) = 1;
3129 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3132 if (!TYPE_NAME (type
))
3133 TYPE_NAME (type
) = tdecl
;
3136 debug_hooks
->type_decl (tdecl
, 0);
3139 /* Record one of the standard Java types.
3140 * Declare it as having the given NAME.
3141 * If SIZE > 0, it is the size of one of the integral types;
3142 * otherwise it is the negative of the size of one of the other types. */
3145 record_builtin_java_type (const char* name
, int size
)
3149 type
= make_signed_type (size
);
3150 else if (size
> -32)
3151 { /* "__java_char" or ""__java_boolean". */
3152 type
= make_unsigned_type (-size
);
3153 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3156 { /* "__java_float" or ""__java_double". */
3157 type
= make_node (REAL_TYPE
);
3158 TYPE_PRECISION (type
) = - size
;
3161 record_builtin_type (RID_MAX
, name
, type
);
3162 decl
= TYPE_NAME (type
);
3164 /* Suppress generate debug symbol entries for these types,
3165 since for normal C++ they are just clutter.
3166 However, push_lang_context undoes this if extern "Java" is seen. */
3167 DECL_IGNORED_P (decl
) = 1;
3169 TYPE_FOR_JAVA (type
) = 1;
3173 /* Push a type into the namespace so that the back ends ignore it. */
3176 record_unknown_type (tree type
, const char* name
)
3178 tree decl
= pushdecl (build_decl (TYPE_DECL
, get_identifier (name
), type
));
3179 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3180 DECL_IGNORED_P (decl
) = 1;
3181 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3182 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3183 TYPE_ALIGN (type
) = 1;
3184 TYPE_USER_ALIGN (type
) = 0;
3185 TYPE_MODE (type
) = TYPE_MODE (void_type_node
);
3188 /* A string for which we should create an IDENTIFIER_NODE at
3191 typedef struct predefined_identifier
3193 /* The name of the identifier. */
3194 const char *const name
;
3195 /* The place where the IDENTIFIER_NODE should be stored. */
3197 /* Nonzero if this is the name of a constructor or destructor. */
3198 const int ctor_or_dtor_p
;
3199 } predefined_identifier
;
3201 /* Create all the predefined identifiers. */
3204 initialize_predefined_identifiers (void)
3206 const predefined_identifier
*pid
;
3208 /* A table of identifiers to create at startup. */
3209 static const predefined_identifier predefined_identifiers
[] = {
3210 { "C++", &lang_name_cplusplus
, 0 },
3211 { "C", &lang_name_c
, 0 },
3212 { "Java", &lang_name_java
, 0 },
3213 /* Some of these names have a trailing space so that it is
3214 impossible for them to conflict with names written by users. */
3215 { "__ct ", &ctor_identifier
, 1 },
3216 { "__base_ctor ", &base_ctor_identifier
, 1 },
3217 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3218 { "__dt ", &dtor_identifier
, 1 },
3219 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3220 { "__base_dtor ", &base_dtor_identifier
, 1 },
3221 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3222 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3223 { "nelts", &nelts_identifier
, 0 },
3224 { THIS_NAME
, &this_identifier
, 0 },
3225 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3226 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3227 { "_vptr", &vptr_identifier
, 0 },
3228 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3229 { "::", &global_scope_name
, 0 },
3230 { "std", &std_identifier
, 0 },
3234 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3236 *pid
->node
= get_identifier (pid
->name
);
3237 if (pid
->ctor_or_dtor_p
)
3238 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3242 /* Create the predefined scalar types of C,
3243 and some nodes representing standard constants (0, 1, (void *)0).
3244 Initialize the global binding level.
3245 Make definitions for built-in primitive functions. */
3248 cxx_init_decl_processing (void)
3251 tree void_ftype_ptr
;
3253 build_common_tree_nodes (flag_signed_char
, false);
3255 /* Create all the identifiers we need. */
3256 initialize_predefined_identifiers ();
3258 /* Create the global variables. */
3259 push_to_top_level ();
3261 current_function_decl
= NULL_TREE
;
3262 current_binding_level
= NULL
;
3263 /* Enter the global namespace. */
3264 gcc_assert (global_namespace
== NULL_TREE
);
3265 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3267 TREE_PUBLIC (global_namespace
) = 1;
3268 begin_scope (sk_namespace
, global_namespace
);
3270 current_lang_name
= NULL_TREE
;
3272 if (flag_visibility_ms_compat
)
3273 default_visibility
= VISIBILITY_HIDDEN
;
3276 current_lang_name
= lang_name_c
;
3278 /* Create the `std' namespace. */
3279 push_namespace (std_identifier
);
3280 std_node
= current_namespace
;
3283 c_common_nodes_and_builtins ();
3285 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3286 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3287 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3288 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3289 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3290 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3291 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3292 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3294 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3295 integer_three_node
= build_int_cst (NULL_TREE
, 3);
3297 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3298 truthvalue_type_node
= boolean_type_node
;
3299 truthvalue_false_node
= boolean_false_node
;
3300 truthvalue_true_node
= boolean_true_node
;
3302 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3305 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3308 delta_type_node
= ptrdiff_type_node
;
3309 vtable_index_type
= ptrdiff_type_node
;
3311 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3312 void_ftype
= build_function_type (void_type_node
, void_list_node
);
3313 void_ftype_ptr
= build_function_type (void_type_node
,
3314 tree_cons (NULL_TREE
,
3318 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3320 /* C++ extensions */
3322 unknown_type_node
= make_node (UNKNOWN_TYPE
);
3323 record_unknown_type (unknown_type_node
, "unknown type");
3325 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3326 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3328 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3330 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3331 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3334 /* Make sure we get a unique function type, so we can give
3335 its pointer type a name. (This wins for gdb.) */
3336 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3337 TREE_TYPE (vfunc_type
) = integer_type_node
;
3338 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3339 layout_type (vfunc_type
);
3341 vtable_entry_type
= build_pointer_type (vfunc_type
);
3343 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3346 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3347 layout_type (vtbl_type_node
);
3348 vtbl_type_node
= build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3349 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3350 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3351 layout_type (vtbl_ptr_type_node
);
3352 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3354 push_namespace (get_identifier ("__cxxabiv1"));
3355 abi_node
= current_namespace
;
3358 global_type_node
= make_node (LANG_TYPE
);
3359 record_unknown_type (global_type_node
, "global type");
3362 current_lang_name
= lang_name_cplusplus
;
3366 tree bad_alloc_type_node
;
3367 tree bad_alloc_decl
;
3368 tree newtype
, deltype
;
3369 tree ptr_ftype_sizetype
;
3371 push_namespace (std_identifier
);
3372 bad_alloc_id
= get_identifier ("bad_alloc");
3373 bad_alloc_type_node
= make_aggr_type (RECORD_TYPE
);
3374 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3376 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3377 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3378 TYPE_STUB_DECL (bad_alloc_type_node
) = bad_alloc_decl
;
3382 = build_function_type (ptr_type_node
,
3383 tree_cons (NULL_TREE
,
3386 newtype
= build_exception_variant
3387 (ptr_ftype_sizetype
, add_exception_specifier
3388 (NULL_TREE
, bad_alloc_type_node
, -1));
3389 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3390 push_cp_library_fn (NEW_EXPR
, newtype
);
3391 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3392 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3393 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3397 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3399 /* Perform other language dependent initializations. */
3400 init_class_processing ();
3401 init_rtti_processing ();
3403 if (flag_exceptions
)
3404 init_exception_processing ();
3406 if (! supports_one_only ())
3409 make_fname_decl
= cp_make_fname_decl
;
3410 start_fname_decls ();
3412 /* Show we use EH for cleanups. */
3413 if (flag_exceptions
)
3414 using_eh_for_cleanups ();
3417 /* Generate an initializer for a function naming variable from
3418 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3419 filled in with the type of the init. */
3422 cp_fname_init (const char* name
, tree
*type_p
)
3424 tree domain
= NULL_TREE
;
3426 tree init
= NULL_TREE
;
3431 length
= strlen (name
);
3432 domain
= build_index_type (size_int (length
));
3433 init
= build_string (length
+ 1, name
);
3436 type
= build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3437 type
= build_cplus_array_type (type
, domain
);
3442 TREE_TYPE (init
) = type
;
3444 init
= error_mark_node
;
3449 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3450 decl, NAME is the initialization string and TYPE_DEP indicates whether
3451 NAME depended on the type of the function. We make use of that to detect
3452 __PRETTY_FUNCTION__ inside a template fn. This is being done
3453 lazily at the point of first use, so we mustn't push the decl now. */
3456 cp_make_fname_decl (tree id
, int type_dep
)
3458 const char *const name
= (type_dep
&& processing_template_decl
3459 ? NULL
: fname_as_string (type_dep
));
3461 tree init
= cp_fname_init (name
, &type
);
3462 tree decl
= build_decl (VAR_DECL
, id
, type
);
3465 free (CONST_CAST (name
));
3467 /* As we're using pushdecl_with_scope, we must set the context. */
3468 DECL_CONTEXT (decl
) = current_function_decl
;
3469 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3471 TREE_STATIC (decl
) = 1;
3472 TREE_READONLY (decl
) = 1;
3473 DECL_ARTIFICIAL (decl
) = 1;
3475 TREE_USED (decl
) = 1;
3477 if (current_function_decl
)
3479 struct cp_binding_level
*b
= current_binding_level
;
3480 while (b
->level_chain
->kind
!= sk_function_parms
)
3482 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3483 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3484 LOOKUP_ONLYCONVERTING
);
3487 pushdecl_top_level_and_finish (decl
, init
);
3493 builtin_function_1 (tree decl
, tree context
)
3495 tree id
= DECL_NAME (decl
);
3496 const char *name
= IDENTIFIER_POINTER (id
);
3498 retrofit_lang_decl (decl
);
3500 /* All nesting of C++ functions is lexical; there is never a "static
3501 chain" in the sense of GNU C nested functions. */
3502 DECL_NO_STATIC_CHAIN (decl
) = 1;
3504 DECL_ARTIFICIAL (decl
) = 1;
3505 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3506 SET_DECL_LANGUAGE (decl
, lang_c
);
3507 /* Runtime library routines are, by definition, available in an
3508 external shared object. */
3509 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3510 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3512 DECL_CONTEXT (decl
) = context
;
3516 /* A function in the user's namespace should have an explicit
3517 declaration before it is used. Mark the built-in function as
3518 anticipated but not actually declared. */
3519 if (name
[0] != '_' || name
[1] != '_')
3520 DECL_ANTICIPATED (decl
) = 1;
3526 cxx_builtin_function (tree decl
)
3528 tree id
= DECL_NAME (decl
);
3529 const char *name
= IDENTIFIER_POINTER (id
);
3530 /* All builtins that don't begin with an '_' should additionally
3531 go in the 'std' namespace. */
3534 tree decl2
= copy_node(decl
);
3535 push_namespace (std_identifier
);
3536 builtin_function_1 (decl2
, std_node
);
3540 return builtin_function_1 (decl
, NULL_TREE
);
3543 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3544 function. Not called directly. */
3547 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3549 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3550 DECL_EXTERNAL (fn
) = 1;
3551 TREE_PUBLIC (fn
) = 1;
3552 DECL_ARTIFICIAL (fn
) = 1;
3553 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3554 SET_DECL_LANGUAGE (fn
, lang_c
);
3555 /* Runtime library routines are, by definition, available in an
3556 external shared object. */
3557 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3558 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3562 /* Returns the _DECL for a library function with C linkage.
3563 We assume that such functions never throw; if this is incorrect,
3564 callers should unset TREE_NOTHROW. */
3567 build_library_fn (tree name
, tree type
)
3569 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
3570 TREE_NOTHROW (fn
) = 1;
3574 /* Returns the _DECL for a library function with C++ linkage. */
3577 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3579 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3580 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3581 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3582 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3586 /* Like build_library_fn, but takes a C string instead of an
3590 build_library_fn_ptr (const char* name
, tree type
)
3592 return build_library_fn (get_identifier (name
), type
);
3595 /* Like build_cp_library_fn, but takes a C string instead of an
3599 build_cp_library_fn_ptr (const char* name
, tree type
)
3601 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3604 /* Like build_library_fn, but also pushes the function so that we will
3605 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3608 push_library_fn (tree name
, tree type
)
3610 tree fn
= build_library_fn (name
, type
);
3611 pushdecl_top_level (fn
);
3615 /* Like build_cp_library_fn, but also pushes the function so that it
3616 will be found by normal lookup. */
3619 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3621 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3628 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3632 push_void_library_fn (tree name
, tree parmtypes
)
3634 tree type
= build_function_type (void_type_node
, parmtypes
);
3635 return push_library_fn (name
, type
);
3638 /* Like push_library_fn, but also note that this function throws
3639 and does not return. Used for __throw_foo and the like. */
3642 push_throw_library_fn (tree name
, tree type
)
3644 tree fn
= push_library_fn (name
, type
);
3645 TREE_THIS_VOLATILE (fn
) = 1;
3646 TREE_NOTHROW (fn
) = 0;
3650 /* When we call finish_struct for an anonymous union, we create
3651 default copy constructors and such. But, an anonymous union
3652 shouldn't have such things; this function undoes the damage to the
3653 anonymous union type T.
3655 (The reason that we create the synthesized methods is that we don't
3656 distinguish `union { int i; }' from `typedef union { int i; } U'.
3657 The first is an anonymous union; the second is just an ordinary
3661 fixup_anonymous_aggr (tree t
)
3665 /* Wipe out memory of synthesized methods. */
3666 TYPE_HAS_CONSTRUCTOR (t
) = 0;
3667 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3668 TYPE_HAS_INIT_REF (t
) = 0;
3669 TYPE_HAS_CONST_INIT_REF (t
) = 0;
3670 TYPE_HAS_ASSIGN_REF (t
) = 0;
3671 TYPE_HAS_CONST_ASSIGN_REF (t
) = 0;
3673 /* Splice the implicitly generated functions out of the TYPE_METHODS
3675 q
= &TYPE_METHODS (t
);
3678 if (DECL_ARTIFICIAL (*q
))
3679 *q
= TREE_CHAIN (*q
);
3681 q
= &TREE_CHAIN (*q
);
3684 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3685 if (TYPE_METHODS (t
))
3686 error ("%Jan anonymous union cannot have function members",
3687 TYPE_MAIN_DECL (t
));
3689 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3690 assignment operators (because they cannot have these methods themselves).
3691 For anonymous unions this is already checked because they are not allowed
3692 in any union, otherwise we have to check it. */
3693 if (TREE_CODE (t
) != UNION_TYPE
)
3697 for (field
= TYPE_FIELDS (t
); field
; field
= TREE_CHAIN (field
))
3698 if (TREE_CODE (field
) == FIELD_DECL
)
3700 type
= TREE_TYPE (field
);
3701 if (CLASS_TYPE_P (type
))
3703 if (TYPE_NEEDS_CONSTRUCTING (type
))
3704 error ("member %q+#D with constructor not allowed "
3705 "in anonymous aggregate", field
);
3706 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
3707 error ("member %q+#D with destructor not allowed "
3708 "in anonymous aggregate", field
);
3709 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type
))
3710 error ("member %q+#D with copy assignment operator "
3711 "not allowed in anonymous aggregate", field
);
3717 /* Make sure that a declaration with no declarator is well-formed, i.e.
3718 just declares a tagged type or anonymous union.
3720 Returns the type declared; or NULL_TREE if none. */
3723 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
3725 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
3726 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
3727 /* If a class, struct, or enum type is declared by the DECLSPECS
3728 (i.e, if a class-specifier, enum-specifier, or non-typename
3729 elaborated-type-specifier appears in the DECLSPECS),
3730 DECLARED_TYPE is set to the corresponding type. */
3731 tree declared_type
= NULL_TREE
;
3732 bool error_p
= false;
3734 if (declspecs
->multiple_types_p
)
3735 error ("multiple types in one declaration");
3736 else if (declspecs
->redefined_builtin_type
)
3738 if (!in_system_header
)
3739 pedwarn ("redeclaration of C++ built-in type %qT",
3740 declspecs
->redefined_builtin_type
);
3745 && TYPE_P (declspecs
->type
)
3746 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
3747 && IS_AGGR_TYPE (declspecs
->type
))
3748 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
3749 declared_type
= declspecs
->type
;
3750 else if (declspecs
->type
== error_mark_node
)
3752 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
3753 pedwarn ("declaration does not declare anything");
3754 /* Check for an anonymous union. */
3755 else if (declared_type
&& IS_AGGR_TYPE_CODE (TREE_CODE (declared_type
))
3756 && TYPE_ANONYMOUS_P (declared_type
))
3758 /* 7/3 In a simple-declaration, the optional init-declarator-list
3759 can be omitted only when declaring a class (clause 9) or
3760 enumeration (7.2), that is, when the decl-specifier-seq contains
3761 either a class-specifier, an elaborated-type-specifier with
3762 a class-key (9.1), or an enum-specifier. In these cases and
3763 whenever a class-specifier or enum-specifier is present in the
3764 decl-specifier-seq, the identifiers in these specifiers are among
3765 the names being declared by the declaration (as class-name,
3766 enum-names, or enumerators, depending on the syntax). In such
3767 cases, and except for the declaration of an unnamed bit-field (9.6),
3768 the decl-specifier-seq shall introduce one or more names into the
3769 program, or shall redeclare a name introduced by a previous
3770 declaration. [Example:
3771 enum { }; // ill-formed
3772 typedef class { }; // ill-formed
3776 error ("missing type-name in typedef-declaration");
3779 /* Anonymous unions are objects, so they can have specifiers. */;
3780 SET_ANON_AGGR_TYPE_P (declared_type
);
3782 if (TREE_CODE (declared_type
) != UNION_TYPE
&& pedantic
3783 && !in_system_header
)
3784 pedwarn ("ISO C++ prohibits anonymous structs");
3789 if (declspecs
->specs
[(int)ds_inline
]
3790 || declspecs
->specs
[(int)ds_virtual
])
3791 error ("%qs can only be specified for functions",
3792 declspecs
->specs
[(int)ds_inline
]
3793 ? "inline" : "virtual");
3795 && (!current_class_type
3796 || current_scope () != current_class_type
))
3797 error ("%<friend%> can only be specified inside a class");
3798 else if (declspecs
->specs
[(int)ds_explicit
])
3799 error ("%<explicit%> can only be specified for constructors");
3800 else if (declspecs
->storage_class
)
3801 error ("a storage class can only be specified for objects "
3803 else if (declspecs
->specs
[(int)ds_const
]
3804 || declspecs
->specs
[(int)ds_volatile
]
3805 || declspecs
->specs
[(int)ds_restrict
]
3806 || declspecs
->specs
[(int)ds_thread
])
3807 error ("qualifiers can only be specified for objects "
3809 else if (saw_typedef
)
3810 warning (0, "%<typedef%> was ignored in this declaration");
3813 return declared_type
;
3816 /* Called when a declaration is seen that contains no names to declare.
3817 If its type is a reference to a structure, union or enum inherited
3818 from a containing scope, shadow that tag name for the current scope
3819 with a forward reference.
3820 If its type defines a new named structure or union
3821 or defines an enum, it is valid but we need not do anything here.
3822 Otherwise, it is an error.
3824 C++: may have to grok the declspecs to learn about static,
3825 complain for anonymous unions.
3827 Returns the TYPE declared -- or NULL_TREE if none. */
3830 shadow_tag (cp_decl_specifier_seq
*declspecs
)
3832 tree t
= check_tag_decl (declspecs
);
3837 if (declspecs
->attributes
)
3839 warning (0, "attribute ignored in declaration of %q+#T", t
);
3840 warning (0, "attribute for %q+#T must follow the %qs keyword",
3841 t
, class_key_or_enum_as_string (t
));
3845 if (maybe_process_partial_specialization (t
) == error_mark_node
)
3848 /* This is where the variables in an anonymous union are
3849 declared. An anonymous union declaration looks like:
3851 because there is no declarator after the union, the parser
3852 sends that declaration here. */
3853 if (ANON_AGGR_TYPE_P (t
))
3855 fixup_anonymous_aggr (t
);
3857 if (TYPE_FIELDS (t
))
3859 tree decl
= grokdeclarator (/*declarator=*/NULL
,
3860 declspecs
, NORMAL
, 0, NULL
);
3861 finish_anon_union (decl
);
3868 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3871 groktypename (cp_decl_specifier_seq
*type_specifiers
,
3872 const cp_declarator
*declarator
)
3876 attrs
= type_specifiers
->attributes
;
3877 type_specifiers
->attributes
= NULL_TREE
;
3878 type
= grokdeclarator (declarator
, type_specifiers
, TYPENAME
, 0, &attrs
);
3881 if (CLASS_TYPE_P (type
))
3882 warning (OPT_Wattributes
, "ignoring attributes applied to class type "
3883 "outside of definition");
3885 cplus_decl_attributes (&type
, attrs
, 0);
3890 /* Decode a declarator in an ordinary declaration or data definition.
3891 This is called as soon as the type information and variable name
3892 have been parsed, before parsing the initializer if any.
3893 Here we create the ..._DECL node, fill in its type,
3894 and put it on the list of decls for the current context.
3895 The ..._DECL node is returned as the value.
3897 Exception: for arrays where the length is not specified,
3898 the type is left null, to be filled in by `cp_finish_decl'.
3900 Function definitions do not come here; they go to start_function
3901 instead. However, external and forward declarations of functions
3902 do go through here. Structure field declarations are done by
3903 grokfield and not through here. */
3906 start_decl (const cp_declarator
*declarator
,
3907 cp_decl_specifier_seq
*declspecs
,
3910 tree prefix_attributes
,
3911 tree
*pushed_scope_p
)
3918 *pushed_scope_p
= NULL_TREE
;
3920 /* An object declared as __attribute__((deprecated)) suppresses
3921 warnings of uses of other deprecated items. */
3922 if (lookup_attribute ("deprecated", attributes
))
3923 deprecated_state
= DEPRECATED_SUPPRESS
;
3925 attributes
= chainon (attributes
, prefix_attributes
);
3927 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
3930 deprecated_state
= DEPRECATED_NORMAL
;
3932 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
3933 || decl
== error_mark_node
)
3934 return error_mark_node
;
3936 type
= TREE_TYPE (decl
);
3938 context
= DECL_CONTEXT (decl
);
3942 *pushed_scope_p
= push_scope (context
);
3944 /* We are only interested in class contexts, later. */
3945 if (TREE_CODE (context
) == NAMESPACE_DECL
)
3946 context
= NULL_TREE
;
3950 /* Is it valid for this decl to have an initializer at all?
3951 If not, set INITIALIZED to zero, which will indirectly
3952 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3953 switch (TREE_CODE (decl
))
3956 error ("typedef %qD is initialized (use __typeof__ instead)", decl
);
3957 return error_mark_node
;
3960 error ("function %q#D is initialized like a variable", decl
);
3961 return error_mark_node
;
3969 if (! toplevel_bindings_p ()
3970 && DECL_EXTERNAL (decl
))
3971 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3973 DECL_EXTERNAL (decl
) = 0;
3974 if (toplevel_bindings_p ())
3975 TREE_STATIC (decl
) = 1;
3978 /* Set attributes here so if duplicate decl, will have proper attributes. */
3979 cplus_decl_attributes (&decl
, attributes
, 0);
3981 /* Dllimported symbols cannot be defined. Static data members (which
3982 can be initialized in-class and dllimported) go through grokfield,
3983 not here, so we don't need to exclude those decls when checking for
3985 if (initialized
&& DECL_DLLIMPORT_P (decl
))
3987 error ("definition of %q#D is marked %<dllimport%>", decl
);
3988 DECL_DLLIMPORT_P (decl
) = 0;
3991 /* If #pragma weak was used, mark the decl weak now. */
3992 maybe_apply_pragma_weak (decl
);
3994 if (TREE_CODE (decl
) == FUNCTION_DECL
3995 && DECL_DECLARED_INLINE_P (decl
)
3996 && DECL_UNINLINABLE (decl
)
3997 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
3998 warning (0, "inline function %q+D given attribute noinline", decl
);
4000 if (context
&& COMPLETE_TYPE_P (complete_type (context
)))
4002 if (TREE_CODE (decl
) == VAR_DECL
)
4004 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4005 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4006 error ("%q#D is not a static member of %q#T", decl
, context
);
4009 if (DECL_CONTEXT (field
) != context
)
4011 if (!same_type_p (DECL_CONTEXT (field
), context
))
4012 pedwarn ("ISO C++ does not permit %<%T::%D%> "
4013 "to be defined as %<%T::%D%>",
4014 DECL_CONTEXT (field
), DECL_NAME (decl
),
4015 context
, DECL_NAME (decl
));
4016 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4018 if (processing_specialization
4019 && template_class_depth (context
) == 0
4020 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
4021 error ("template header not allowed in member definition "
4022 "of explicitly specialized class");
4023 /* Static data member are tricky; an in-class initialization
4024 still doesn't provide a definition, so the in-class
4025 declaration will have DECL_EXTERNAL set, but will have an
4026 initialization. Thus, duplicate_decls won't warn
4027 about this situation, and so we check here. */
4028 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4029 error ("duplicate initialization of %qD", decl
);
4030 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4036 tree field
= check_classfn (context
, decl
,
4037 (processing_template_decl
4038 > template_class_depth (context
))
4039 ? current_template_parms
4041 if (field
&& field
!= error_mark_node
4042 && duplicate_decls (decl
, field
,
4043 /*newdecl_is_friend=*/false))
4047 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4048 DECL_IN_AGGR_P (decl
) = 0;
4049 /* Do not mark DECL as an explicit specialization if it was not
4050 already marked as an instantiation; a declaration should
4051 never be marked as a specialization unless we know what
4052 template is being specialized. */
4053 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4055 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4057 /* [temp.expl.spec] An explicit specialization of a static data
4058 member of a template is a definition if the declaration
4059 includes an initializer; otherwise, it is a declaration.
4061 We check for processing_specialization so this only applies
4062 to the new specialization syntax. */
4063 if (!initialized
&& processing_specialization
)
4064 DECL_EXTERNAL (decl
) = 1;
4067 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
))
4068 pedwarn ("declaration of %q#D outside of class is not definition",
4072 was_public
= TREE_PUBLIC (decl
);
4074 /* Enter this declaration into the symbol table. */
4075 tem
= maybe_push_decl (decl
);
4077 if (processing_template_decl
)
4078 tem
= push_template_decl (tem
);
4079 if (tem
== error_mark_node
)
4080 return error_mark_node
;
4082 /* Tell the back end to use or not use .common as appropriate. If we say
4083 -fconserve-space, we want this to save .data space, at the expense of
4084 wrong semantics. If we say -fno-conserve-space, we want this to
4085 produce errors about redefs; to do this we force variables into the
4087 if (flag_conserve_space
4088 && TREE_CODE (tem
) == VAR_DECL
4089 && TREE_PUBLIC (tem
)
4090 && !DECL_THREAD_LOCAL_P (tem
)
4091 && !have_global_bss_p ())
4092 DECL_COMMON (tem
) = 1;
4094 if (TREE_CODE (tem
) == VAR_DECL
4095 && DECL_NAMESPACE_SCOPE_P (tem
) && !TREE_PUBLIC (tem
) && !was_public
4096 && !DECL_THIS_STATIC (tem
) && !DECL_ARTIFICIAL (tem
))
4098 /* This is a const variable with implicit 'static'. Set
4099 DECL_THIS_STATIC so we can tell it from variables that are
4100 !TREE_PUBLIC because of the anonymous namespace. */
4101 gcc_assert (cp_type_readonly (TREE_TYPE (tem
)));
4102 DECL_THIS_STATIC (tem
) = 1;
4105 if (!processing_template_decl
&& TREE_CODE (tem
) == VAR_DECL
)
4106 start_decl_1 (tem
, initialized
);
4112 start_decl_1 (tree decl
, bool initialized
)
4116 gcc_assert (!processing_template_decl
);
4118 if (error_operand_p (decl
))
4121 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4122 type
= TREE_TYPE (decl
);
4125 /* Is it valid for this decl to have an initializer at all?
4126 If not, set INITIALIZED to zero, which will indirectly
4127 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4129 /* Don't allow initializations for incomplete types except for
4130 arrays which might be completed by the initialization. */
4131 if (COMPLETE_TYPE_P (complete_type (type
)))
4132 ; /* A complete type is ok. */
4133 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4135 error ("variable %q#D has initializer but incomplete type", decl
);
4137 type
= TREE_TYPE (decl
) = error_mark_node
;
4139 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4141 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4142 error ("elements of array %q#D have incomplete type", decl
);
4143 /* else we already gave an error in start_decl. */
4147 else if (IS_AGGR_TYPE (type
)
4148 && ! DECL_EXTERNAL (decl
))
4150 if (!COMPLETE_TYPE_P (complete_type (type
)))
4152 error ("aggregate %q#D has incomplete type and cannot be defined",
4154 /* Change the type so that assemble_variable will give
4155 DECL an rtl we can live with: (mem (const_int 0)). */
4156 type
= TREE_TYPE (decl
) = error_mark_node
;
4160 /* If any base type in the hierarchy of TYPE needs a constructor,
4161 then we set initialized to 1. This way any nodes which are
4162 created for the purposes of initializing this aggregate
4163 will live as long as it does. This is necessary for global
4164 aggregates which do not have their initializers processed until
4165 the end of the file. */
4166 initialized
= TYPE_NEEDS_CONSTRUCTING (type
);
4170 /* Create a new scope to hold this declaration if necessary.
4171 Whether or not a new scope is necessary cannot be determined
4172 until after the type has been completed; if the type is a
4173 specialization of a class template it is not until after
4174 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4175 will be set correctly. */
4176 maybe_push_cleanup_level (type
);
4179 /* Handle initialization of references. DECL, TYPE, and INIT have the
4180 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4181 but will be set to a new CLEANUP_STMT if a temporary is created
4182 that must be destroyed subsequently.
4184 Returns an initializer expression to use to initialize DECL, or
4185 NULL if the initialization can be performed statically.
4187 Quotes on semantics can be found in ARM 8.4.3. */
4190 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
4194 if (init
== NULL_TREE
)
4196 if ((DECL_LANG_SPECIFIC (decl
) == 0
4197 || DECL_IN_AGGR_P (decl
) == 0)
4198 && ! DECL_THIS_EXTERN (decl
))
4199 error ("%qD declared as reference but not initialized", decl
);
4203 if (TREE_CODE (init
) == CONSTRUCTOR
)
4205 error ("ISO C++ forbids use of initializer list to "
4206 "initialize reference %qD", decl
);
4210 if (TREE_CODE (init
) == TREE_LIST
)
4211 init
= build_x_compound_expr_from_list (init
, "initializer");
4213 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4214 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4215 /* Note: default conversion is only called in very special cases. */
4216 init
= decay_conversion (init
);
4218 /* Convert INIT to the reference type TYPE. This may involve the
4219 creation of a temporary, whose lifetime must be the same as that
4220 of the reference. If so, a DECL_EXPR for the temporary will be
4221 added just after the DECL_EXPR for DECL. That's why we don't set
4222 DECL_INITIAL for local references (instead assigning to them
4223 explicitly); we need to allow the temporary to be initialized
4225 tmp
= initialize_reference (type
, init
, decl
, cleanup
);
4227 if (tmp
== error_mark_node
)
4229 else if (tmp
== NULL_TREE
)
4231 error ("cannot initialize %qT from %qT", type
, TREE_TYPE (init
));
4235 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
4238 DECL_INITIAL (decl
) = tmp
;
4243 /* Designated initializers in arrays are not supported in GNU C++.
4244 The parser cannot detect this error since it does not know whether
4245 a given brace-enclosed initializer is for a class type or for an
4246 array. This function checks that CE does not use a designated
4247 initializer. If it does, an error is issued. Returns true if CE
4248 is valid, i.e., does not have a designated initializer. */
4251 check_array_designated_initializer (const constructor_elt
*ce
)
4253 /* Designated initializers for array elements are not supported. */
4256 /* The parser only allows identifiers as designated
4258 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4259 error ("name %qD used in a GNU-style designated "
4260 "initializer for an array", ce
->index
);
4267 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4268 array until we finish parsing the initializer. If that's the
4269 situation we're in, update DECL accordingly. */
4272 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4274 tree type
= TREE_TYPE (decl
);
4276 if (TREE_CODE (type
) == ARRAY_TYPE
4277 && TYPE_DOMAIN (type
) == NULL_TREE
4278 && TREE_CODE (decl
) != TYPE_DECL
)
4280 /* do_default is really a C-ism to deal with tentative definitions.
4281 But let's leave it here to ease the eventual merge. */
4282 int do_default
= !DECL_EXTERNAL (decl
);
4283 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4286 /* Check that there are no designated initializers in INIT, as
4287 those are not supported in GNU C++, and as the middle-end
4288 will crash if presented with a non-numeric designated
4290 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4292 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4293 constructor_elt
*ce
;
4296 VEC_iterate (constructor_elt
, v
, i
, ce
);
4298 if (!check_array_designated_initializer (ce
))
4304 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4308 error ("initializer fails to determine size of %qD", decl
);
4309 TREE_TYPE (decl
) = error_mark_node
;
4311 else if (failure
== 2)
4315 error ("array size missing in %qD", decl
);
4316 TREE_TYPE (decl
) = error_mark_node
;
4318 /* If a `static' var's size isn't known, make it extern as
4319 well as static, so it does not get allocated. If it's not
4320 `static', then don't mark it extern; finish_incomplete_decl
4321 will give it a default size and it will get allocated. */
4322 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4323 DECL_EXTERNAL (decl
) = 1;
4325 else if (failure
== 3)
4327 error ("zero-size array %qD", decl
);
4328 TREE_TYPE (decl
) = error_mark_node
;
4332 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4334 layout_decl (decl
, 0);
4338 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4339 any appropriate error messages regarding the layout. */
4342 layout_var_decl (tree decl
)
4346 type
= TREE_TYPE (decl
);
4347 if (type
== error_mark_node
)
4350 /* If we haven't already layed out this declaration, do so now.
4351 Note that we must not call complete type for an external object
4352 because it's type might involve templates that we are not
4353 supposed to instantiate yet. (And it's perfectly valid to say
4354 `extern X x' for some incomplete type `X'.) */
4355 if (!DECL_EXTERNAL (decl
))
4356 complete_type (type
);
4357 if (!DECL_SIZE (decl
)
4358 && TREE_TYPE (decl
) != error_mark_node
4359 && (COMPLETE_TYPE_P (type
)
4360 || (TREE_CODE (type
) == ARRAY_TYPE
4361 && !TYPE_DOMAIN (type
)
4362 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4363 layout_decl (decl
, 0);
4365 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4367 /* An automatic variable with an incomplete type: that is an error.
4368 Don't talk about array types here, since we took care of that
4369 message in grokdeclarator. */
4370 error ("storage size of %qD isn't known", decl
);
4371 TREE_TYPE (decl
) = error_mark_node
;
4374 /* Keep this code around in case we later want to control debug info
4375 based on whether a type is "used". (jason 1999-11-11) */
4377 else if (!DECL_EXTERNAL (decl
) && IS_AGGR_TYPE (ttype
))
4378 /* Let debugger know it should output info for this type. */
4379 note_debug_info_needed (ttype
);
4381 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4382 note_debug_info_needed (DECL_CONTEXT (decl
));
4385 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4386 && DECL_SIZE (decl
) != NULL_TREE
4387 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4389 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4390 constant_expression_warning (DECL_SIZE (decl
));
4392 error ("storage size of %qD isn't constant", decl
);
4396 /* If a local static variable is declared in an inline function, or if
4397 we have a weak definition, we must endeavor to create only one
4398 instance of the variable at link-time. */
4401 maybe_commonize_var (tree decl
)
4403 /* Static data in a function with comdat linkage also has comdat
4405 if (TREE_STATIC (decl
)
4406 /* Don't mess with __FUNCTION__. */
4407 && ! DECL_ARTIFICIAL (decl
)
4408 && DECL_FUNCTION_SCOPE_P (decl
)
4409 /* Unfortunately, import_export_decl has not always been called
4410 before the function is processed, so we cannot simply check
4412 && (DECL_COMDAT (DECL_CONTEXT (decl
))
4413 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl
))
4414 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl
)))
4415 && TREE_PUBLIC (DECL_CONTEXT (decl
)))))
4419 /* With weak symbols, we simply make the variable COMDAT;
4420 that will cause copies in multiple translations units to
4422 comdat_linkage (decl
);
4426 if (DECL_INITIAL (decl
) == NULL_TREE
4427 || DECL_INITIAL (decl
) == error_mark_node
)
4429 /* Without weak symbols, we can use COMMON to merge
4430 uninitialized variables. */
4431 TREE_PUBLIC (decl
) = 1;
4432 DECL_COMMON (decl
) = 1;
4436 /* While for initialized variables, we must use internal
4437 linkage -- which means that multiple copies will not
4439 TREE_PUBLIC (decl
) = 0;
4440 DECL_COMMON (decl
) = 0;
4441 warning (0, "sorry: semantics of inline function static "
4442 "data %q+#D are wrong (you'll wind up "
4443 "with multiple copies)", decl
);
4444 warning (0, "%J you can work around this by removing "
4450 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4451 /* Set it up again; we might have set DECL_INITIAL since the last
4453 comdat_linkage (decl
);
4456 /* Issue an error message if DECL is an uninitialized const variable. */
4459 check_for_uninitialized_const_var (tree decl
)
4461 tree type
= TREE_TYPE (decl
);
4463 /* ``Unless explicitly declared extern, a const object does not have
4464 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4466 if (TREE_CODE (decl
) == VAR_DECL
4467 && TREE_CODE (type
) != REFERENCE_TYPE
4468 && CP_TYPE_CONST_P (type
)
4469 && !TYPE_NEEDS_CONSTRUCTING (type
)
4470 && !DECL_INITIAL (decl
))
4471 error ("uninitialized const %qD", decl
);
4475 /* Structure holding the current initializer being processed by reshape_init.
4476 CUR is a pointer to the current element being processed, END is a pointer
4477 after the last element present in the initializer. */
4478 typedef struct reshape_iterator_t
4480 constructor_elt
*cur
;
4481 constructor_elt
*end
;
4484 static tree
reshape_init_r (tree
, reshape_iter
*, bool);
4486 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4487 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4488 initialized. If there are no more such fields, the return value
4492 next_initializable_field (tree field
)
4495 && (TREE_CODE (field
) != FIELD_DECL
4496 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4497 || DECL_ARTIFICIAL (field
)))
4498 field
= TREE_CHAIN (field
);
4503 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4504 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4505 INTEGER_CST representing the size of the array minus one (the maximum index),
4506 or NULL_TREE if the array was declared without specifying the size. D is
4507 the iterator within the constructor. */
4510 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
)
4513 bool sized_array_p
= (max_index
!= NULL_TREE
);
4514 unsigned HOST_WIDE_INT max_index_cst
= 0;
4515 unsigned HOST_WIDE_INT index
;
4517 /* The initializer for an array is always a CONSTRUCTOR. */
4518 new_init
= build_constructor (NULL_TREE
, NULL
);
4522 /* Minus 1 is used for zero sized arrays. */
4523 if (integer_all_onesp (max_index
))
4526 if (host_integerp (max_index
, 1))
4527 max_index_cst
= tree_low_cst (max_index
, 1);
4528 /* sizetype is sign extended, not zero extended. */
4530 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
4534 /* Loop until there are no more initializers. */
4536 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
4541 check_array_designated_initializer (d
->cur
);
4542 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false);
4543 if (elt_init
== error_mark_node
)
4544 return error_mark_node
;
4545 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), NULL_TREE
, elt_init
);
4551 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4552 Parameters are the same of reshape_init_r. */
4555 reshape_init_array (tree type
, reshape_iter
*d
)
4557 tree max_index
= NULL_TREE
;
4559 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
4561 if (TYPE_DOMAIN (type
))
4562 max_index
= array_type_nelts (type
);
4564 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
);
4567 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4568 Parameters are the same of reshape_init_r. */
4571 reshape_init_vector (tree type
, reshape_iter
*d
)
4573 tree max_index
= NULL_TREE
;
4576 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
4578 if (COMPOUND_LITERAL_P (d
->cur
->value
))
4580 tree value
= d
->cur
->value
;
4581 if (!same_type_p (TREE_TYPE (value
), type
))
4583 error ("invalid type %qT as initializer for a vector of type %qT",
4584 TREE_TYPE (d
->cur
->value
), type
);
4585 value
= error_mark_node
;
4591 /* For a vector, the representation type is a struct
4592 containing a single member which is an array of the
4593 appropriate size. */
4594 rtype
= TYPE_DEBUG_REPRESENTATION_TYPE (type
);
4595 if (rtype
&& TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype
))))
4596 max_index
= array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype
)));
4598 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
);
4601 /* Subroutine of reshape_init_r, processes the initializers for classes
4602 or union. Parameters are the same of reshape_init_r. */
4605 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
)
4610 gcc_assert (CLASS_TYPE_P (type
));
4612 /* The initializer for a class is always a CONSTRUCTOR. */
4613 new_init
= build_constructor (NULL_TREE
, NULL
);
4614 field
= next_initializable_field (TYPE_FIELDS (type
));
4620 An initializer for an aggregate member that is an
4621 empty class shall have the form of an empty
4622 initializer-list {}. */
4623 if (!first_initializer_p
)
4625 error ("initializer for %qT must be brace-enclosed", type
);
4626 return error_mark_node
;
4631 /* Loop through the initializable fields, gathering initializers. */
4632 while (d
->cur
!= d
->end
)
4636 /* Handle designated initializers, as an extension. */
4639 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
4641 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
4643 error ("%qT has no non-static data member named %qD", type
,
4645 return error_mark_node
;
4649 /* If we processed all the member of the class, we are done. */
4653 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
4654 /*first_initializer_p=*/false);
4655 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
4659 When a union is initialized with a brace-enclosed
4660 initializer, the braces shall only contain an
4661 initializer for the first member of the union. */
4662 if (TREE_CODE (type
) == UNION_TYPE
)
4665 field
= next_initializable_field (TREE_CHAIN (field
));
4671 /* Subroutine of reshape_init, which processes a single initializer (part of
4672 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4673 iterator within the CONSTRUCTOR which points to the initializer to process.
4674 FIRST_INITIALIZER_P is true if this is the first initializer of the
4675 CONSTRUCTOR node. */
4678 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
)
4680 tree init
= d
->cur
->value
;
4682 /* A non-aggregate type is always initialized with a single
4684 if (!CP_AGGREGATE_TYPE_P (type
))
4686 /* It is invalid to initialize a non-aggregate type with a
4687 brace-enclosed initializer.
4688 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4689 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4690 a CONSTRUCTOR (with a record type). */
4691 if (TREE_CODE (init
) == CONSTRUCTOR
4692 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
4694 error ("braces around scalar initializer for type %qT", type
);
4695 init
= error_mark_node
;
4704 All implicit type conversions (clause _conv_) are considered when
4705 initializing the aggregate member with an initializer from an
4706 initializer-list. If the initializer can initialize a member,
4707 the member is initialized. Otherwise, if the member is itself a
4708 non-empty subaggregate, brace elision is assumed and the
4709 initializer is considered for the initialization of the first
4710 member of the subaggregate. */
4711 if (TREE_CODE (init
) != CONSTRUCTOR
4712 && can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
))
4718 /* [dcl.init.string]
4720 A char array (whether plain char, signed char, or unsigned char)
4721 can be initialized by a string-literal (optionally enclosed in
4722 braces); a wchar_t array can be initialized by a wide
4723 string-literal (optionally enclosed in braces). */
4724 if (TREE_CODE (type
) == ARRAY_TYPE
4725 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
4727 tree str_init
= init
;
4729 /* Strip one level of braces if and only if they enclose a single
4730 element (as allowed by [dcl.init.string]). */
4731 if (!first_initializer_p
4732 && TREE_CODE (str_init
) == CONSTRUCTOR
4733 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
4735 str_init
= VEC_index (constructor_elt
,
4736 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
4739 /* If it's a string literal, then it's the initializer for the array
4740 as a whole. Otherwise, continue with normal initialization for
4741 array types (one value per array element). */
4742 if (TREE_CODE (str_init
) == STRING_CST
)
4749 /* The following cases are about aggregates. If we are not within a full
4750 initializer already, and there is not a CONSTRUCTOR, it means that there
4751 is a missing set of braces (that is, we are processing the case for
4752 which reshape_init exists). */
4753 if (!first_initializer_p
)
4755 if (TREE_CODE (init
) == CONSTRUCTOR
)
4757 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
4758 /* There is no need to reshape pointer-to-member function
4759 initializers, as they are always constructed correctly
4760 by the front end. */
4762 else if (COMPOUND_LITERAL_P (init
))
4763 /* For a nested compound literal, there is no need to reshape since
4764 brace elision is not allowed. Even if we decided to allow it,
4765 we should add a call to reshape_init in finish_compound_literal,
4766 before calling digest_init, so changing this code would still
4767 not be necessary. */
4768 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
4772 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
4773 return reshape_init (type
, init
);
4777 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
4781 /* Dispatch to specialized routines. */
4782 if (CLASS_TYPE_P (type
))
4783 return reshape_init_class (type
, d
, first_initializer_p
);
4784 else if (TREE_CODE (type
) == ARRAY_TYPE
)
4785 return reshape_init_array (type
, d
);
4786 else if (TREE_CODE (type
) == VECTOR_TYPE
)
4787 return reshape_init_vector (type
, d
);
4792 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4793 brace-enclosed aggregate initializer.
4795 INIT is the CONSTRUCTOR containing the list of initializers describing
4796 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4797 It may not presently match the shape of the TYPE; for example:
4799 struct S { int a; int b; };
4800 struct S a[] = { 1, 2, 3, 4 };
4802 Here INIT will hold a VEC of four elements, rather than a
4803 VEC of two elements, each itself a VEC of two elements. This
4804 routine transforms INIT from the former form into the latter. The
4805 revised CONSTRUCTOR node is returned. */
4808 reshape_init (tree type
, tree init
)
4810 VEC(constructor_elt
, gc
) *v
;
4814 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
4816 v
= CONSTRUCTOR_ELTS (init
);
4818 /* An empty constructor does not need reshaping, and it is always a valid
4820 if (VEC_empty (constructor_elt
, v
))
4823 /* Recurse on this CONSTRUCTOR. */
4824 d
.cur
= VEC_index (constructor_elt
, v
, 0);
4825 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
4827 new_init
= reshape_init_r (type
, &d
, true);
4828 if (new_init
== error_mark_node
)
4829 return error_mark_node
;
4831 /* Make sure all the element of the constructor were used. Otherwise,
4832 issue an error about exceeding initializers. */
4834 error ("too many initializers for %qT", type
);
4839 /* Verify INIT (the initializer for DECL), and record the
4840 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4841 grok_reference_init.
4843 If the return value is non-NULL, it is an expression that must be
4844 evaluated dynamically to initialize DECL. */
4847 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
4849 tree type
= TREE_TYPE (decl
);
4850 tree init_code
= NULL
;
4852 /* Things that are going to be initialized need to have complete
4854 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
4856 if (type
== error_mark_node
)
4857 /* We will have already complained. */
4860 if (TREE_CODE (type
) == ARRAY_TYPE
)
4862 tree element_type
= TREE_TYPE (type
);
4864 /* The array type itself need not be complete, because the
4865 initializer may tell us how many elements are in the array.
4866 But, the elements of the array must be complete. */
4867 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
4869 error ("elements of array %q#D have incomplete type", decl
);
4872 /* It is not valid to initialize a VLA. */
4874 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
4875 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
4877 error ("variable-sized object %qD may not be initialized", decl
);
4881 else if (!COMPLETE_TYPE_P (type
))
4883 error ("%qD has incomplete type", decl
);
4884 TREE_TYPE (decl
) = error_mark_node
;
4888 /* There is no way to make a variable-sized class type in GNU C++. */
4889 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
4891 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
4893 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
4894 if (SCALAR_TYPE_P (type
))
4898 error ("scalar object %qD requires one element in initializer",
4900 TREE_TYPE (decl
) = error_mark_node
;
4904 else if ((cxx_dialect
== cxx98
) && !CP_AGGREGATE_TYPE_P (type
))
4906 /* A non-aggregate that is not a scalar cannot be initialized
4907 via an initializer-list in C++98. */
4908 error ("braces around initializer for non-aggregate type %qT",
4910 TREE_TYPE (decl
) = error_mark_node
;
4915 if (TREE_CODE (decl
) == CONST_DECL
)
4917 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
4919 DECL_INITIAL (decl
) = init
;
4921 gcc_assert (init
!= NULL_TREE
);
4924 else if (!DECL_EXTERNAL (decl
) && TREE_CODE (type
) == REFERENCE_TYPE
)
4925 init
= grok_reference_init (decl
, type
, init
, cleanup
);
4928 /* Do not reshape constructors of vectors (they don't need to be
4930 if (TREE_CODE (init
) == CONSTRUCTOR
4931 && !COMPOUND_LITERAL_P (init
)
4932 && !TREE_TYPE (init
)) /* ptrmemfunc */
4934 init
= reshape_init (type
, init
);
4936 if ((*targetm
.vector_opaque_p
) (type
))
4938 error ("opaque vector types cannot be initialized");
4939 init
= error_mark_node
;
4943 /* If DECL has an array type without a specific bound, deduce the
4944 array size from the initializer. */
4945 maybe_deduce_size_from_array_init (decl
, init
);
4946 type
= TREE_TYPE (decl
);
4947 if (type
== error_mark_node
)
4950 if (TYPE_HAS_CONSTRUCTOR (type
) || TYPE_NEEDS_CONSTRUCTING (type
))
4952 if (TREE_CODE (type
) == ARRAY_TYPE
)
4953 goto initialize_aggr
;
4954 else if (TREE_CODE (init
) == CONSTRUCTOR
)
4956 if (TYPE_NON_AGGREGATE_CLASS (type
))
4958 error ("%qD must be initialized by constructor, "
4961 init
= error_mark_node
;
4964 goto dont_use_constructor
;
4968 int saved_stmts_are_full_exprs_p
;
4971 saved_stmts_are_full_exprs_p
= 0;
4972 if (building_stmt_tree ())
4974 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4975 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4977 init
= build_aggr_init (decl
, init
, flags
);
4978 if (building_stmt_tree ())
4979 current_stmt_tree ()->stmts_are_full_exprs_p
=
4980 saved_stmts_are_full_exprs_p
;
4986 dont_use_constructor
:
4987 if (TREE_CODE (init
) != TREE_VEC
)
4989 init_code
= store_init_value (decl
, init
);
4990 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
4991 && DECL_INITIAL (decl
)
4992 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
4993 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
4994 warning (0, "array %qD initialized by parenthesized string literal %qE",
4995 decl
, DECL_INITIAL (decl
));
5000 else if (DECL_EXTERNAL (decl
))
5002 else if (TYPE_P (type
) && TYPE_NEEDS_CONSTRUCTING (type
))
5003 goto initialize_aggr
;
5004 else if (IS_AGGR_TYPE (type
))
5006 tree core_type
= strip_array_types (type
);
5008 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
))
5009 error ("structure %qD with uninitialized const members", decl
);
5010 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
))
5011 error ("structure %qD with uninitialized reference members", decl
);
5013 check_for_uninitialized_const_var (decl
);
5016 check_for_uninitialized_const_var (decl
);
5018 if (init
&& init
!= error_mark_node
)
5019 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5024 /* If DECL is not a local variable, give it RTL. */
5027 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5029 int toplev
= toplevel_bindings_p ();
5031 const char *filename
;
5033 /* Set the DECL_ASSEMBLER_NAME for the object. */
5036 /* The `register' keyword, when used together with an
5037 asm-specification, indicates that the variable should be
5038 placed in a particular register. */
5039 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5041 set_user_assembler_name (decl
, asmspec
);
5042 DECL_HARD_REGISTER (decl
) = 1;
5046 if (TREE_CODE (decl
) == FUNCTION_DECL
5047 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5048 set_builtin_user_assembler_name (decl
, asmspec
);
5049 set_user_assembler_name (decl
, asmspec
);
5053 /* Handle non-variables up front. */
5054 if (TREE_CODE (decl
) != VAR_DECL
)
5056 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5060 /* If we see a class member here, it should be a static data
5062 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5064 gcc_assert (TREE_STATIC (decl
));
5065 /* An in-class declaration of a static data member should be
5066 external; it is only a declaration, and not a definition. */
5067 if (init
== NULL_TREE
)
5068 gcc_assert (DECL_EXTERNAL (decl
));
5071 /* We don't create any RTL for local variables. */
5072 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5075 /* We defer emission of local statics until the corresponding
5076 DECL_EXPR is expanded. */
5077 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5079 /* We try to defer namespace-scope static constants so that they are
5080 not emitted into the object file unnecessarily. */
5081 filename
= input_filename
;
5082 if (!DECL_VIRTUAL_P (decl
)
5083 && TREE_READONLY (decl
)
5084 && DECL_INITIAL (decl
) != NULL_TREE
5085 && DECL_INITIAL (decl
) != error_mark_node
5087 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5089 && !TREE_PUBLIC (decl
))
5091 /* Fool with the linkage of static consts according to #pragma
5093 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5094 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5096 TREE_PUBLIC (decl
) = 1;
5097 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5102 /* Likewise for template instantiations. */
5103 else if (DECL_LANG_SPECIFIC (decl
)
5104 && DECL_IMPLICIT_INSTANTIATION (decl
))
5107 /* If we're not deferring, go ahead and assemble the variable. */
5109 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5112 /* Generate code to initialize DECL (a local variable). */
5115 initialize_local_var (tree decl
, tree init
)
5117 tree type
= TREE_TYPE (decl
);
5120 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5121 || TREE_CODE (decl
) == RESULT_DECL
);
5122 gcc_assert (!TREE_STATIC (decl
));
5124 if (DECL_SIZE (decl
) == NULL_TREE
)
5126 /* If we used it already as memory, it must stay in memory. */
5127 DECL_INITIAL (decl
) = NULL_TREE
;
5128 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5131 if (DECL_SIZE (decl
) && type
!= error_mark_node
)
5135 /* Compute and store the initial value. */
5136 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5138 /* Perform the initialization. */
5141 int saved_stmts_are_full_exprs_p
;
5143 gcc_assert (building_stmt_tree ());
5144 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5145 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5146 finish_expr_stmt (init
);
5147 current_stmt_tree ()->stmts_are_full_exprs_p
=
5148 saved_stmts_are_full_exprs_p
;
5151 /* Set this to 0 so we can tell whether an aggregate which was
5152 initialized was ever used. Don't do this if it has a
5153 destructor, so we don't complain about the 'resource
5154 allocation is initialization' idiom. Now set
5155 attribute((unused)) on types so decls of that type will be
5156 marked used. (see TREE_USED, above.) */
5157 if (TYPE_NEEDS_CONSTRUCTING (type
)
5159 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5160 && DECL_NAME (decl
))
5161 TREE_USED (decl
) = 0;
5162 else if (already_used
)
5163 TREE_USED (decl
) = 1;
5166 /* Generate a cleanup, if necessary. */
5167 cleanup
= cxx_maybe_build_cleanup (decl
);
5168 if (DECL_SIZE (decl
) && cleanup
)
5169 finish_decl_cleanup (decl
, cleanup
);
5172 /* DECL is a VAR_DECL for a compiler-generated variable with static
5173 storage duration (like a virtual table) whose initializer is a
5174 compile-time constant. INIT must be either a TREE_LIST of values,
5175 or a CONSTRUCTOR. Initialize the variable and provide it to the
5179 initialize_artificial_var (tree decl
, tree init
)
5181 gcc_assert (DECL_ARTIFICIAL (decl
));
5182 if (TREE_CODE (init
) == TREE_LIST
)
5183 init
= build_constructor_from_list (NULL_TREE
, init
);
5184 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5185 DECL_INITIAL (decl
) = init
;
5186 DECL_INITIALIZED_P (decl
) = 1;
5187 determine_visibility (decl
);
5188 layout_var_decl (decl
);
5189 maybe_commonize_var (decl
);
5190 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5193 /* INIT is the initializer for a variable, as represented by the
5194 parser. Returns true iff INIT is value-dependent. */
5197 value_dependent_init_p (tree init
)
5199 if (TREE_CODE (init
) == TREE_LIST
)
5200 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5201 return any_value_dependent_elements_p (init
);
5202 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5203 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5205 VEC(constructor_elt
, gc
) *elts
;
5209 elts
= CONSTRUCTOR_ELTS (init
);
5210 nelts
= VEC_length (constructor_elt
, elts
);
5211 for (i
= 0; i
< nelts
; ++i
)
5212 if (value_dependent_init_p (VEC_index (constructor_elt
,
5217 /* It must be a simple expression, e.g., int i = 3; */
5218 return value_dependent_expression_p (init
);
5223 /* Finish processing of a declaration;
5224 install its line number and initial value.
5225 If the length of an array type is not known before,
5226 it must be determined now, from the initial value, or it is an error.
5228 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5229 true, then INIT is an integral constant expression.
5231 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5232 if the (init) syntax was used. */
5235 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5236 tree asmspec_tree
, int flags
)
5240 const char *asmspec
= NULL
;
5241 int was_readonly
= 0;
5242 bool var_definition_p
= false;
5243 int saved_processing_template_decl
;
5245 if (decl
== error_mark_node
)
5250 error ("assignment (not initialization) in declaration");
5254 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5255 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5256 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
5258 type
= TREE_TYPE (decl
);
5259 if (type
== error_mark_node
)
5262 /* Assume no cleanup is required. */
5263 cleanup
= NULL_TREE
;
5264 saved_processing_template_decl
= processing_template_decl
;
5266 /* If a name was specified, get the string. */
5267 if (global_scope_p (current_binding_level
))
5268 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
5269 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
5270 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
5272 if (current_class_type
5273 && CP_DECL_CONTEXT (decl
) == current_class_type
5274 && TYPE_BEING_DEFINED (current_class_type
)
5275 && (DECL_INITIAL (decl
) || init
))
5276 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
5278 if (processing_template_decl
)
5280 bool type_dependent_p
;
5282 /* Add this declaration to the statement-tree. */
5283 if (at_function_scope_p ())
5284 add_decl_expr (decl
);
5286 type_dependent_p
= dependent_type_p (type
);
5288 if (init
&& init_const_expr_p
)
5290 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
5291 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl
))
5292 TREE_CONSTANT (decl
) = 1;
5295 /* Generally, initializers in templates are expanded when the
5296 template is instantiated. But, if DECL is an integral
5297 constant static data member, then it can be used in future
5298 integral constant expressions, and its value must be
5301 && DECL_CLASS_SCOPE_P (decl
)
5302 && DECL_INTEGRAL_CONSTANT_VAR_P (decl
)
5303 && !type_dependent_p
5304 && !value_dependent_init_p (init
)))
5307 DECL_INITIAL (decl
) = init
;
5308 if (TREE_CODE (decl
) == VAR_DECL
5309 && !DECL_PRETTY_FUNCTION_P (decl
)
5310 && !type_dependent_p
)
5311 maybe_deduce_size_from_array_init (decl
, init
);
5315 init
= fold_non_dependent_expr (init
);
5316 processing_template_decl
= 0;
5319 /* Take care of TYPE_DECLs up front. */
5320 if (TREE_CODE (decl
) == TYPE_DECL
)
5322 if (type
!= error_mark_node
5323 && IS_AGGR_TYPE (type
) && DECL_NAME (decl
))
5325 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
5326 warning (0, "shadowing previous type declaration of %q#D", decl
);
5327 set_identifier_type_value (DECL_NAME (decl
), decl
);
5330 /* If we have installed this as the canonical typedef for this
5331 type, and that type has not been defined yet, delay emitting
5332 the debug information for it, as we will emit it later. */
5333 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
5334 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
5335 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
5337 rest_of_decl_compilation (decl
, DECL_CONTEXT (decl
) == NULL_TREE
,
5342 /* A reference will be modified here, as it is initialized. */
5343 if (! DECL_EXTERNAL (decl
)
5344 && TREE_READONLY (decl
)
5345 && TREE_CODE (type
) == REFERENCE_TYPE
)
5348 TREE_READONLY (decl
) = 0;
5351 if (TREE_CODE (decl
) == VAR_DECL
)
5353 /* Only PODs can have thread-local storage. Other types may require
5354 various kinds of non-trivial initialization. */
5355 if (DECL_THREAD_LOCAL_P (decl
) && !pod_type_p (TREE_TYPE (decl
)))
5356 error ("%qD cannot be thread-local because it has non-POD type %qT",
5357 decl
, TREE_TYPE (decl
));
5358 /* If this is a local variable that will need a mangled name,
5359 register it now. We must do this before processing the
5360 initializer for the variable, since the initialization might
5361 require a guard variable, and since the mangled name of the
5362 guard variable will depend on the mangled name of this
5364 if (!processing_template_decl
5365 && DECL_FUNCTION_SCOPE_P (decl
)
5366 && TREE_STATIC (decl
)
5367 && !DECL_ARTIFICIAL (decl
))
5368 push_local_name (decl
);
5369 /* Convert the initializer to the type of DECL, if we have not
5370 already initialized DECL. */
5371 if (!DECL_INITIALIZED_P (decl
)
5372 /* If !DECL_EXTERNAL then DECL is being defined. In the
5373 case of a static data member initialized inside the
5374 class-specifier, there can be an initializer even if DECL
5375 is *not* defined. */
5376 && (!DECL_EXTERNAL (decl
) || init
))
5380 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
5381 if (init_const_expr_p
)
5383 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
5384 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl
))
5385 TREE_CONSTANT (decl
) = 1;
5388 init
= check_initializer (decl
, init
, flags
, &cleanup
);
5389 /* Thread-local storage cannot be dynamically initialized. */
5390 if (DECL_THREAD_LOCAL_P (decl
) && init
)
5392 error ("%qD is thread-local and so cannot be dynamically "
5393 "initialized", decl
);
5397 /* Check that the initializer for a static data member was a
5398 constant. Although we check in the parser that the
5399 initializer is an integral constant expression, we do not
5400 simplify division-by-zero at the point at which it
5401 occurs. Therefore, in:
5403 struct S { static const int i = 7 / 0; };
5405 we issue an error at this point. It would
5406 probably be better to forbid division by zero in
5407 integral constant expressions. */
5408 if (DECL_EXTERNAL (decl
) && init
)
5410 error ("%qD cannot be initialized by a non-constant expression"
5411 " when being declared", decl
);
5412 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
5420 The memory occupied by any object of static storage
5421 duration is zero-initialized at program startup before
5422 any other initialization takes place.
5424 We cannot create an appropriate initializer until after
5425 the type of DECL is finalized. If DECL_INITIAL is set,
5426 then the DECL is statically initialized, and any
5427 necessary zero-initialization has already been performed. */
5428 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
5429 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
5430 /*nelts=*/NULL_TREE
,
5431 /*static_storage_p=*/true);
5432 /* Remember that the initialization for this variable has
5434 DECL_INITIALIZED_P (decl
) = 1;
5435 /* This declaration is the definition of this variable,
5436 unless we are initializing a static data member within
5437 the class specifier. */
5438 if (!DECL_EXTERNAL (decl
))
5439 var_definition_p
= true;
5441 /* If the variable has an array type, lay out the type, even if
5442 there is no initializer. It is valid to index through the
5443 array, and we must get TYPE_ALIGN set correctly on the array
5445 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5449 /* Add this declaration to the statement-tree. This needs to happen
5450 after the call to check_initializer so that the DECL_EXPR for a
5451 reference temp is added before the DECL_EXPR for the reference itself. */
5452 if (at_function_scope_p ())
5453 add_decl_expr (decl
);
5455 /* Let the middle end know about variables and functions -- but not
5456 static data members in uninstantiated class templates. */
5457 if (!saved_processing_template_decl
5458 && (TREE_CODE (decl
) == VAR_DECL
5459 || TREE_CODE (decl
) == FUNCTION_DECL
))
5461 if (TREE_CODE (decl
) == VAR_DECL
)
5463 layout_var_decl (decl
);
5464 maybe_commonize_var (decl
);
5467 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
5469 /* Check for abstractness of the type. Notice that there is no
5470 need to strip array types here since the check for those types
5471 is already done within create_array_type_for_decl. */
5472 if (TREE_CODE (type
) == FUNCTION_TYPE
5473 || TREE_CODE (type
) == METHOD_TYPE
)
5474 abstract_virtuals_error (decl
, TREE_TYPE (type
));
5476 abstract_virtuals_error (decl
, type
);
5478 /* This needs to happen after the linkage is set. */
5479 determine_visibility (decl
);
5481 if (TREE_CODE (decl
) == FUNCTION_DECL
5482 || TREE_TYPE (decl
) == error_mark_node
)
5483 /* No initialization required. */
5485 else if (DECL_EXTERNAL (decl
)
5486 && ! (DECL_LANG_SPECIFIC (decl
)
5487 && DECL_NOT_REALLY_EXTERN (decl
)))
5490 DECL_INITIAL (decl
) = init
;
5494 /* A variable definition. */
5495 if (DECL_FUNCTION_SCOPE_P (decl
))
5497 /* Initialize the local variable. */
5498 if (processing_template_decl
)
5499 DECL_INITIAL (decl
) = init
;
5500 else if (!TREE_STATIC (decl
))
5501 initialize_local_var (decl
, init
);
5504 /* If a variable is defined, and then a subsequent
5505 definition with external linkage is encountered, we will
5506 get here twice for the same variable. We want to avoid
5507 calling expand_static_init more than once. For variables
5508 that are not static data members, we can call
5509 expand_static_init only when we actually process the
5510 initializer. It is not legal to redeclare a static data
5511 member, so this issue does not arise in that case. */
5512 if (var_definition_p
&& TREE_STATIC (decl
))
5514 /* If a TREE_READONLY variable needs initialization
5515 at runtime, it is no longer readonly and we need to
5516 avoid MEM_READONLY_P being set on RTL created for it. */
5519 if (TREE_READONLY (decl
))
5520 TREE_READONLY (decl
) = 0;
5523 expand_static_init (decl
, init
);
5528 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5529 reference, insert it in the statement-tree now. */
5531 push_cleanup (decl
, cleanup
, false);
5534 processing_template_decl
= saved_processing_template_decl
;
5537 TREE_READONLY (decl
) = 1;
5539 /* If this was marked 'used', be sure it will be output. */
5540 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl
)))
5541 mark_decl_referenced (decl
);
5544 /* This is here for a midend callback from c-common.c. */
5547 finish_decl (tree decl
, tree init
, tree asmspec_tree
)
5549 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, asmspec_tree
, 0);
5552 /* Returns a declaration for a VAR_DECL as if:
5554 extern "C" TYPE NAME;
5556 had been seen. Used to create compiler-generated global
5560 declare_global_var (tree name
, tree type
)
5564 push_to_top_level ();
5565 decl
= build_decl (VAR_DECL
, name
, type
);
5566 TREE_PUBLIC (decl
) = 1;
5567 DECL_EXTERNAL (decl
) = 1;
5568 DECL_ARTIFICIAL (decl
) = 1;
5569 /* If the user has explicitly declared this variable (perhaps
5570 because the code we are compiling is part of a low-level runtime
5571 library), then it is possible that our declaration will be merged
5572 with theirs by pushdecl. */
5573 decl
= pushdecl (decl
);
5574 finish_decl (decl
, NULL_TREE
, NULL_TREE
);
5575 pop_from_top_level ();
5580 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5581 if "__cxa_atexit" is not being used) corresponding to the function
5582 to be called when the program exits. */
5585 get_atexit_fn_ptr_type (void)
5590 if (!atexit_fn_ptr_type_node
)
5592 if (flag_use_cxa_atexit
5593 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
5594 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5595 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5597 /* The parameter to "atexit" is "void (*)(void)". */
5598 arg_types
= void_list_node
;
5600 fn_type
= build_function_type (void_type_node
, arg_types
);
5601 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
5604 return atexit_fn_ptr_type_node
;
5607 /* Returns a pointer to the `atexit' function. Note that if
5608 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5609 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5612 get_atexit_node (void)
5619 bool use_aeabi_atexit
;
5624 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
5626 /* The declaration for `__cxa_atexit' is:
5628 int __cxa_atexit (void (*)(void *), void *, void *)
5630 We build up the argument types and then then function type
5633 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
5634 /* First, build the pointer-to-function type for the first
5636 fn_ptr_type
= get_atexit_fn_ptr_type ();
5637 /* Then, build the rest of the argument types. */
5638 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5639 if (use_aeabi_atexit
)
5641 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
5642 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
5646 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
5647 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
5649 /* And the final __cxa_atexit type. */
5650 fn_type
= build_function_type (integer_type_node
, arg_types
);
5651 fn_ptr_type
= build_pointer_type (fn_type
);
5652 if (use_aeabi_atexit
)
5653 name
= "__aeabi_atexit";
5655 name
= "__cxa_atexit";
5659 /* The declaration for `atexit' is:
5661 int atexit (void (*)());
5663 We build up the argument types and then then function type
5665 fn_ptr_type
= get_atexit_fn_ptr_type ();
5666 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, void_list_node
);
5667 /* Build the final atexit type. */
5668 fn_type
= build_function_type (integer_type_node
, arg_types
);
5672 /* Now, build the function declaration. */
5673 push_lang_context (lang_name_c
);
5674 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
5675 mark_used (atexit_fndecl
);
5676 pop_lang_context ();
5677 atexit_node
= decay_conversion (atexit_fndecl
);
5682 /* Returns the __dso_handle VAR_DECL. */
5685 get_dso_handle_node (void)
5687 if (dso_handle_node
)
5688 return dso_handle_node
;
5690 /* Declare the variable. */
5691 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
5694 return dso_handle_node
;
5697 /* Begin a new function with internal linkage whose job will be simply
5698 to destroy some particular variable. */
5700 static GTY(()) int start_cleanup_cnt
;
5703 start_cleanup_fn (void)
5708 bool use_cxa_atexit
= flag_use_cxa_atexit
5709 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
5711 push_to_top_level ();
5713 /* No need to mangle this. */
5714 push_lang_context (lang_name_c
);
5716 /* Build the name of the function. */
5717 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
5718 /* Build the function declaration. */
5719 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
5720 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
5721 /* It's a function with internal linkage, generated by the
5723 TREE_PUBLIC (fndecl
) = 0;
5724 DECL_ARTIFICIAL (fndecl
) = 1;
5725 /* Make the function `inline' so that it is only emitted if it is
5726 actually needed. It is unlikely that it will be inlined, since
5727 it is only called via a function pointer, but we avoid unnecessary
5728 emissions this way. */
5729 DECL_INLINE (fndecl
) = 1;
5730 DECL_DECLARED_INLINE_P (fndecl
) = 1;
5731 DECL_INTERFACE_KNOWN (fndecl
) = 1;
5732 /* Build the parameter. */
5737 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
5738 DECL_CONTEXT (parmdecl
) = fndecl
;
5739 TREE_USED (parmdecl
) = 1;
5740 DECL_ARGUMENTS (fndecl
) = parmdecl
;
5744 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
5746 pop_lang_context ();
5748 return current_function_decl
;
5751 /* Finish the cleanup function begun by start_cleanup_fn. */
5754 end_cleanup_fn (void)
5756 expand_or_defer_fn (finish_function (0));
5758 pop_from_top_level ();
5761 /* Generate code to handle the destruction of DECL, an object with
5762 static storage duration. */
5765 register_dtor_fn (tree decl
)
5774 type
= TREE_TYPE (decl
);
5775 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
5776 return void_zero_node
;
5778 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
5779 a class object, we can just pass the destructor to
5780 "__cxa_atexit"; we don't have to build a temporary function to do
5782 use_dtor
= (flag_use_cxa_atexit
5783 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()
5784 && CLASS_TYPE_P (type
));
5789 /* Find the destructor. */
5790 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
5791 gcc_assert (idx
>= 0);
5792 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
5793 /* Make sure it is accessible. */
5794 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
);
5798 /* Call build_cleanup before we enter the anonymous function so
5799 that any access checks will be done relative to the current
5800 scope, rather than the scope of the anonymous function. */
5801 build_cleanup (decl
);
5803 /* Now start the function. */
5804 cleanup
= start_cleanup_fn ();
5806 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5807 to the original function, rather than the anonymous one. That
5808 will make the back end think that nested functions are in use,
5809 which causes confusion. */
5810 push_deferring_access_checks (dk_no_check
);
5811 fcall
= build_cleanup (decl
);
5812 pop_deferring_access_checks ();
5814 /* Create the body of the anonymous function. */
5815 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
5816 finish_expr_stmt (fcall
);
5817 finish_compound_stmt (compound_stmt
);
5821 /* Call atexit with the cleanup function. */
5822 mark_used (cleanup
);
5823 cleanup
= build_address (cleanup
);
5824 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
5830 /* We must convert CLEANUP to the type that "__cxa_atexit"
5832 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
5833 /* "__cxa_atexit" will pass the address of DECL to the
5834 cleanup function. */
5836 addr
= build_address (decl
);
5837 /* The declared type of the parameter to "__cxa_atexit" is
5838 "void *". For plain "T*", we could just let the
5839 machinery in build_function_call convert it -- but if the
5840 type is "cv-qualified T *", then we need to convert it
5841 before passing it in, to avoid spurious errors. */
5842 addr
= build_nop (ptr_type_node
, addr
);
5845 /* Since the cleanup functions we build ignore the address
5846 they're given, there's no reason to pass the actual address
5847 in, and, in general, it's cheaper to pass NULL than any
5849 addr
= null_pointer_node
;
5850 args
= tree_cons (NULL_TREE
,
5851 build_unary_op (ADDR_EXPR
, get_dso_handle_node (), 0),
5853 if (targetm
.cxx
.use_aeabi_atexit ())
5855 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5856 args
= tree_cons (NULL_TREE
, addr
, args
);
5860 args
= tree_cons (NULL_TREE
, addr
, args
);
5861 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5865 args
= tree_cons (NULL_TREE
, cleanup
, NULL_TREE
);
5866 return build_function_call (get_atexit_node (), args
);
5869 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5870 is its initializer. Generate code to handle the construction
5871 and destruction of DECL. */
5874 expand_static_init (tree decl
, tree init
)
5876 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
5877 gcc_assert (TREE_STATIC (decl
));
5879 /* Some variables require no initialization. */
5881 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
5882 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5885 if (DECL_FUNCTION_SCOPE_P (decl
))
5887 /* Emit code to perform this initialization but once. */
5888 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
5889 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
5890 tree guard
, guard_addr
;
5891 tree acquire_fn
, release_fn
, abort_fn
;
5894 /* Emit code to perform this initialization but once. This code
5897 static <type> guard;
5898 if (!guard.first_byte) {
5899 if (__cxa_guard_acquire (&guard)) {
5902 // Do initialization.
5903 flag = true; __cxa_guard_release (&guard);
5904 // Register variable for destruction at end of program.
5906 if (!flag) __cxa_guard_abort (&guard);
5910 Note that the `flag' variable is only set to 1 *after* the
5911 initialization is complete. This ensures that an exception,
5912 thrown during the construction, will cause the variable to
5913 reinitialized when we pass through this code again, as per:
5917 If the initialization exits by throwing an exception, the
5918 initialization is not complete, so it will be tried again
5919 the next time control enters the declaration.
5921 This process should be thread-safe, too; multiple threads
5922 should not be able to initialize the variable more than
5925 /* Create the guard variable. */
5926 guard
= get_guard (decl
);
5928 /* This optimization isn't safe on targets with relaxed memory
5929 consistency. On such targets we force synchronization in
5930 __cxa_guard_acquire. */
5931 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
5933 /* Begin the conditional initialization. */
5934 if_stmt
= begin_if_stmt ();
5935 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
5936 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5939 if (flag_threadsafe_statics
)
5941 guard_addr
= build_address (guard
);
5943 acquire_fn
= get_identifier ("__cxa_guard_acquire");
5944 release_fn
= get_identifier ("__cxa_guard_release");
5945 abort_fn
= get_identifier ("__cxa_guard_abort");
5946 if (!get_global_value_if_present (acquire_fn
, &acquire_fn
))
5948 tree argtypes
= tree_cons (NULL_TREE
, TREE_TYPE (guard_addr
),
5950 tree vfntype
= build_function_type (void_type_node
, argtypes
);
5951 acquire_fn
= push_library_fn
5952 (acquire_fn
, build_function_type (integer_type_node
, argtypes
));
5953 release_fn
= push_library_fn (release_fn
, vfntype
);
5954 abort_fn
= push_library_fn (abort_fn
, vfntype
);
5958 release_fn
= identifier_global_value (release_fn
);
5959 abort_fn
= identifier_global_value (abort_fn
);
5962 inner_if_stmt
= begin_if_stmt ();
5963 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
5966 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5967 begin
= get_target_expr (boolean_false_node
);
5968 flag
= TARGET_EXPR_SLOT (begin
);
5970 TARGET_EXPR_CLEANUP (begin
)
5971 = build3 (COND_EXPR
, void_type_node
, flag
,
5973 build_call_n (abort_fn
, 1, guard_addr
));
5974 CLEANUP_EH_ONLY (begin
) = 1;
5976 /* Do the initialization itself. */
5977 init
= add_stmt_to_compound (begin
, init
);
5978 init
= add_stmt_to_compound
5979 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
5980 init
= add_stmt_to_compound
5981 (init
, build_call_n (release_fn
, 1, guard_addr
));
5984 init
= add_stmt_to_compound (init
, set_guard (guard
));
5986 /* Use atexit to register a function for destroying this static
5988 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
5990 finish_expr_stmt (init
);
5992 if (flag_threadsafe_statics
)
5994 finish_compound_stmt (inner_then_clause
);
5995 finish_then_clause (inner_if_stmt
);
5996 finish_if_stmt (inner_if_stmt
);
5999 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6001 finish_compound_stmt (then_clause
);
6002 finish_then_clause (if_stmt
);
6003 finish_if_stmt (if_stmt
);
6007 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
6011 /* Make TYPE a complete type based on INITIAL_VALUE.
6012 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6013 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6014 3 if the initializer list is empty (in pedantic mode). */
6017 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
6020 tree type
, elt_type
;
6024 /* An array of character type can be initialized from a
6025 brace-enclosed string constant.
6027 FIXME: this code is duplicated from reshape_init. Probably
6028 we should just call reshape_init here? */
6029 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
6030 && TREE_CODE (initial_value
) == CONSTRUCTOR
6031 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
6033 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
6034 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
6036 if (TREE_CODE (value
) == STRING_CST
6037 && VEC_length (constructor_elt
, v
) == 1)
6038 initial_value
= value
;
6042 failure
= complete_array_type (ptype
, initial_value
, do_default
);
6044 /* We can create the array before the element type is complete, which
6045 means that we didn't have these two bits set in the original type
6046 either. In completing the type, we are expected to propagate these
6047 bits. See also complete_type which does the same thing for arrays
6050 if (TYPE_DOMAIN (type
))
6052 elt_type
= TREE_TYPE (type
);
6053 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
6054 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
6055 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
6061 /* Return zero if something is declared to be a member of type
6062 CTYPE when in the context of CUR_TYPE. STRING is the error
6063 message to print in that case. Otherwise, quietly return 1. */
6066 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
6068 if (ctype
&& ctype
!= cur_type
)
6070 if (flags
== DTOR_FLAG
)
6071 error ("destructor for alien class %qT cannot be a member", ctype
);
6073 error ("constructor for alien class %qT cannot be a member", ctype
);
6079 /* Subroutine of `grokdeclarator'. */
6081 /* Generate errors possibly applicable for a given set of specifiers.
6082 This is for ARM $7.1.2. */
6085 bad_specifiers (tree object
,
6094 error ("%qD declared as a %<virtual%> %s", object
, type
);
6096 error ("%qD declared as an %<inline%> %s", object
, type
);
6098 error ("%<const%> and %<volatile%> function specifiers on "
6099 "%qD invalid in %s declaration",
6102 error ("%q+D declared as a friend", object
);
6104 && (TREE_CODE (object
) == TYPE_DECL
6105 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
6106 && !TYPE_REFFN_P (TREE_TYPE (object
))
6107 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
6108 error ("%q+D declared with an exception specification", object
);
6111 /* DECL is a member function or static data member and is presently
6112 being defined. Check that the definition is taking place in a
6116 check_class_member_definition_namespace (tree decl
)
6118 /* These checks only apply to member functions and static data
6120 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
6121 || TREE_CODE (decl
) == VAR_DECL
);
6122 /* We check for problems with specializations in pt.c in
6123 check_specialization_namespace, where we can issue better
6125 if (processing_specialization
)
6127 /* There are no restrictions on the placement of
6128 explicit instantiations. */
6129 if (processing_explicit_instantiation
)
6133 A member function definition that appears outside of the
6134 class definition shall appear in a namespace scope enclosing
6135 the class definition.
6139 The definition for a static data member shall appear in a
6140 namespace scope enclosing the member's class definition. */
6141 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
6142 pedwarn ("definition of %qD is not in namespace enclosing %qT",
6143 decl
, DECL_CONTEXT (decl
));
6146 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6147 METHOD_TYPE for a non-static member function; QUALS are the
6148 cv-qualifiers that apply to the function. */
6151 build_this_parm (tree type
, cp_cv_quals quals
)
6156 cp_cv_quals this_quals
;
6158 this_type
= TREE_VALUE (TYPE_ARG_TYPES (type
));
6159 /* The `this' parameter is implicitly `const'; it cannot be
6161 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
6162 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
6163 parm
= build_artificial_parm (this_identifier
, qual_type
);
6164 cp_apply_type_quals_to_decl (this_quals
, parm
);
6168 /* CTYPE is class type, or null if non-class.
6169 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6171 DECLARATOR is the function's name.
6172 PARMS is a chain of PARM_DECLs for the function.
6173 VIRTUALP is truthvalue of whether the function is virtual or not.
6174 FLAGS are to be passed through to `grokclassfn'.
6175 QUALS are qualifiers indicating whether the function is `const'
6177 RAISES is a list of exceptions that this function can raise.
6178 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6179 not look, and -1 if we should not call `grokclassfn' at all.
6181 SFK is the kind of special function (if any) for the new function.
6183 Returns `NULL_TREE' if something goes wrong, after issuing
6184 applicable error messages. */
6187 grokfndecl (tree ctype
,
6191 tree orig_declarator
,
6193 enum overload_flags flags
,
6200 special_function_kind sfk
,
6207 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
6211 type
= build_exception_variant (type
, raises
);
6213 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
6214 if (TREE_CODE (type
) == METHOD_TYPE
)
6217 parm
= build_this_parm (type
, quals
);
6218 TREE_CHAIN (parm
) = parms
;
6221 DECL_ARGUMENTS (decl
) = parms
;
6222 /* Propagate volatile out from type to decl. */
6223 if (TYPE_VOLATILE (type
))
6224 TREE_THIS_VOLATILE (decl
) = 1;
6226 /* Setup decl according to sfk. */
6229 case sfk_constructor
:
6230 case sfk_copy_constructor
:
6231 DECL_CONSTRUCTOR_P (decl
) = 1;
6233 case sfk_destructor
:
6234 DECL_DESTRUCTOR_P (decl
) = 1;
6240 /* If pointers to member functions use the least significant bit to
6241 indicate whether a function is virtual, ensure a pointer
6242 to this function will have that bit clear. */
6243 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
6244 && TREE_CODE (type
) == METHOD_TYPE
6245 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
6246 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
6249 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
6253 ("defining explicit specialization %qD in friend declaration",
6257 tree fns
= TREE_OPERAND (orig_declarator
, 0);
6258 tree args
= TREE_OPERAND (orig_declarator
, 1);
6260 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6262 /* Something like `template <class T> friend void f<T>()'. */
6263 error ("invalid use of template-id %qD in declaration "
6264 "of primary template",
6270 /* A friend declaration of the form friend void f<>(). Record
6271 the information in the TEMPLATE_ID_EXPR. */
6272 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
6274 if (TREE_CODE (fns
) == COMPONENT_REF
)
6276 /* Due to bison parser ickiness, we will have already looked
6277 up an operator_name or PFUNCNAME within the current class
6278 (see template_id in parse.y). If the current class contains
6279 such a name, we'll get a COMPONENT_REF here. Undo that. */
6281 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
6282 == current_class_type
);
6283 fns
= TREE_OPERAND (fns
, 1);
6285 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
6286 || TREE_CODE (fns
) == OVERLOAD
);
6287 DECL_TEMPLATE_INFO (decl
) = tree_cons (fns
, args
, NULL_TREE
);
6289 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
6290 if (TREE_PURPOSE (t
)
6291 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
6293 error ("default arguments are not allowed in declaration "
6294 "of friend template specialization %qD",
6301 error ("%<inline%> is not allowed in declaration of friend "
6302 "template specialization %qD",
6309 /* If this decl has namespace scope, set that up. */
6311 set_decl_namespace (decl
, in_namespace
, friendp
);
6313 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
6315 /* `main' and builtins have implicit 'C' linkage. */
6316 if ((MAIN_NAME_P (declarator
)
6317 || (IDENTIFIER_LENGTH (declarator
) > 10
6318 && IDENTIFIER_POINTER (declarator
)[0] == '_'
6319 && IDENTIFIER_POINTER (declarator
)[1] == '_'
6320 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
6321 && current_lang_name
== lang_name_cplusplus
6322 && ctype
== NULL_TREE
6323 /* NULL_TREE means global namespace. */
6324 && DECL_CONTEXT (decl
) == NULL_TREE
)
6325 SET_DECL_LANGUAGE (decl
, lang_c
);
6327 /* Should probably propagate const out from type to decl I bet (mrs). */
6330 DECL_STATIC_FUNCTION_P (decl
) = 1;
6331 DECL_CONTEXT (decl
) = ctype
;
6336 DECL_CONTEXT (decl
) = ctype
;
6338 check_class_member_definition_namespace (decl
);
6341 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
6343 if (processing_template_decl
)
6344 error ("cannot declare %<::main%> to be a template");
6346 error ("cannot declare %<::main%> to be inline");
6348 error ("cannot declare %<::main%> to be static");
6353 /* Members of anonymous types and local classes have no linkage; make
6354 them internal. If a typedef is made later, this will be changed. */
6355 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
6356 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
6361 /* [basic.link]: A name with no linkage (notably, the name of a class
6362 or enumeration declared in a local scope) shall not be used to
6363 declare an entity with linkage.
6365 Only check this for public decls for now. See core 319, 389. */
6366 t
= no_linkage_check (TREE_TYPE (decl
),
6367 /*relaxed_p=*/false);
6370 if (TYPE_ANONYMOUS_P (t
))
6372 if (DECL_EXTERN_C_P (decl
))
6373 /* Allow this; it's pretty common in C. */;
6376 pedwarn ("non-local function %q#D uses anonymous type",
6378 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
6379 pedwarn ("%q+#D does not refer to the unqualified "
6380 "type, so it is not used for linkage",
6385 pedwarn ("non-local function %q#D uses local type %qT", decl
, t
);
6389 TREE_PUBLIC (decl
) = publicp
;
6392 DECL_INTERFACE_KNOWN (decl
) = 1;
6393 DECL_NOT_REALLY_EXTERN (decl
) = 1;
6396 /* If the declaration was declared inline, mark it as such. */
6398 DECL_DECLARED_INLINE_P (decl
) = 1;
6399 /* We inline functions that are explicitly declared inline, or, when
6400 the user explicitly asks us to, all functions. */
6401 if (DECL_DECLARED_INLINE_P (decl
)
6402 || (flag_inline_trees
== 2 && !DECL_INLINE (decl
) && funcdef_flag
))
6403 DECL_INLINE (decl
) = 1;
6405 DECL_EXTERNAL (decl
) = 1;
6406 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
6409 ? G_("static member function %qD cannot have cv-qualifier")
6410 : G_("non-member function %qD cannot have cv-qualifier"),
6412 quals
= TYPE_UNQUALIFIED
;
6415 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
6416 && !grok_op_properties (decl
, /*complain=*/true))
6419 if (ctype
&& decl_function_context (decl
))
6420 DECL_NO_STATIC_CHAIN (decl
) = 1;
6423 /* Make the init_value nonzero so pushdecl knows this is not
6424 tentative. error_mark_node is replaced later with the BLOCK. */
6425 DECL_INITIAL (decl
) = error_mark_node
;
6427 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
6428 TREE_NOTHROW (decl
) = 1;
6430 /* Caller will do the rest of this. */
6434 if (ctype
!= NULL_TREE
)
6435 grokclassfn (ctype
, decl
, flags
);
6437 decl
= check_explicit_specialization (orig_declarator
, decl
,
6440 4 * (friendp
!= 0));
6441 if (decl
== error_mark_node
)
6446 cplus_decl_attributes (&decl
, *attrlist
, 0);
6447 *attrlist
= NULL_TREE
;
6450 /* Check main's type after attributes have been applied. */
6451 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
6453 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
6456 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
6458 error ("%<::main%> must return %<int%>");
6459 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
6460 TREE_TYPE (decl
) = newtype
;
6462 check_main_parameter_types (decl
);
6465 if (ctype
!= NULL_TREE
6466 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
6469 tree old_decl
= check_classfn (ctype
, decl
,
6470 (processing_template_decl
6471 > template_class_depth (ctype
))
6472 ? current_template_parms
6475 if (old_decl
== error_mark_node
)
6483 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
6484 /* Because grokfndecl is always supposed to return a
6485 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6486 here. We depend on our callers to figure out that its
6487 really a template that's being returned. */
6488 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
6490 if (DECL_STATIC_FUNCTION_P (old_decl
)
6491 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
6492 /* Remove the `this' parm added by grokclassfn.
6493 XXX Isn't this done in start_function, too? */
6494 revert_static_member_fn (decl
);
6495 if (DECL_ARTIFICIAL (old_decl
))
6496 error ("definition of implicitly-declared %qD", old_decl
);
6498 /* Since we've smashed OLD_DECL to its
6499 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6500 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
6501 decl
= DECL_TEMPLATE_RESULT (decl
);
6503 /* Attempt to merge the declarations. This can fail, in
6504 the case of some invalid specialization declarations. */
6505 pushed_scope
= push_scope (ctype
);
6506 ok
= duplicate_decls (decl
, old_decl
, friendp
);
6508 pop_scope (pushed_scope
);
6511 error ("no %q#D member function declared in class %qT",
6519 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
6522 if (ctype
== NULL_TREE
|| check
)
6526 DECL_VIRTUAL_P (decl
) = 1;
6531 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6532 the linkage that DECL will receive in the object file. */
6535 set_linkage_for_static_data_member (tree decl
)
6537 /* A static data member always has static storage duration and
6538 external linkage. Note that static data members are forbidden in
6539 local classes -- the only situation in which a class has
6540 non-external linkage. */
6541 TREE_PUBLIC (decl
) = 1;
6542 TREE_STATIC (decl
) = 1;
6543 /* For non-template classes, static data members are always put
6544 out in exactly those files where they are defined, just as
6545 with ordinary namespace-scope variables. */
6546 if (!processing_template_decl
)
6547 DECL_INTERFACE_KNOWN (decl
) = 1;
6550 /* Create a VAR_DECL named NAME with the indicated TYPE.
6552 If SCOPE is non-NULL, it is the class type or namespace containing
6553 the variable. If SCOPE is NULL, the variable should is created in
6554 the innermost enclosings scope. */
6557 grokvardecl (tree type
,
6559 const cp_decl_specifier_seq
*declspecs
,
6565 tree explicit_scope
;
6567 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
6569 /* Compute the scope in which to place the variable, but remember
6570 whether or not that scope was explicitly specified by the user. */
6571 explicit_scope
= scope
;
6574 /* An explicit "extern" specifier indicates a namespace-scope
6576 if (declspecs
->storage_class
== sc_extern
)
6577 scope
= current_namespace
;
6578 else if (!at_function_scope_p ())
6579 scope
= current_scope ();
6583 && (/* If the variable is a namespace-scope variable declared in a
6584 template, we need DECL_LANG_SPECIFIC. */
6585 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
6586 /* Similarly for namespace-scope variables with language linkage
6588 || (TREE_CODE (scope
) == NAMESPACE_DECL
6589 && current_lang_name
!= lang_name_cplusplus
)
6590 /* Similarly for static data members. */
6592 decl
= build_lang_decl (VAR_DECL
, name
, type
);
6594 decl
= build_decl (VAR_DECL
, name
, type
);
6596 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
6597 set_decl_namespace (decl
, explicit_scope
, 0);
6599 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
6601 if (declspecs
->storage_class
== sc_extern
)
6603 DECL_THIS_EXTERN (decl
) = 1;
6604 DECL_EXTERNAL (decl
) = !initialized
;
6607 if (DECL_CLASS_SCOPE_P (decl
))
6609 set_linkage_for_static_data_member (decl
);
6610 /* This function is only called with out-of-class definitions. */
6611 DECL_EXTERNAL (decl
) = 0;
6612 check_class_member_definition_namespace (decl
);
6614 /* At top level, either `static' or no s.c. makes a definition
6615 (perhaps tentative), and absence of `static' makes it public. */
6616 else if (toplevel_bindings_p ())
6618 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
6619 && (DECL_THIS_EXTERN (decl
) || ! constp
));
6620 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
6622 /* Not at top level, only `static' makes a static definition. */
6625 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
6626 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
6629 if (declspecs
->specs
[(int)ds_thread
])
6630 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
6632 if (TREE_PUBLIC (decl
))
6634 /* [basic.link]: A name with no linkage (notably, the name of a class
6635 or enumeration declared in a local scope) shall not be used to
6636 declare an entity with linkage.
6638 Only check this for public decls for now. */
6639 tree t
= no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false);
6642 if (TYPE_ANONYMOUS_P (t
))
6644 if (DECL_EXTERN_C_P (decl
))
6645 /* Allow this; it's pretty common in C. */
6649 /* DRs 132, 319 and 389 seem to indicate types with
6650 no linkage can only be used to declare extern "C"
6651 entities. Since it's not always an error in the
6652 ISO C++ 90 Standard, we only issue a warning. */
6653 warning (0, "non-local variable %q#D uses anonymous type",
6655 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
6656 warning (0, "%q+#D does not refer to the unqualified "
6657 "type, so it is not used for linkage",
6662 warning (0, "non-local variable %q#D uses local type %qT", decl
, t
);
6666 DECL_INTERFACE_KNOWN (decl
) = 1;
6671 /* Create and return a canonical pointer to member function type, for
6672 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6675 build_ptrmemfunc_type (tree type
)
6679 tree unqualified_variant
= NULL_TREE
;
6681 if (type
== error_mark_node
)
6684 /* If a canonical type already exists for this type, use it. We use
6685 this method instead of type_hash_canon, because it only does a
6686 simple equality check on the list of field members. */
6688 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
6691 /* Make sure that we always have the unqualified pointer-to-member
6693 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6695 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
6697 t
= make_aggr_type (RECORD_TYPE
);
6698 xref_basetypes (t
, NULL_TREE
);
6700 /* Let the front end know this is a pointer to member function... */
6701 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
6702 /* ... and not really an aggregate. */
6703 SET_IS_AGGR_TYPE (t
, 0);
6705 field
= build_decl (FIELD_DECL
, pfn_identifier
, type
);
6708 field
= build_decl (FIELD_DECL
, delta_identifier
, delta_type_node
);
6709 TREE_CHAIN (field
) = fields
;
6712 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
6714 /* Zap out the name so that the back end will give us the debugging
6715 information for this anonymous RECORD_TYPE. */
6716 TYPE_NAME (t
) = NULL_TREE
;
6718 /* If this is not the unqualified form of this pointer-to-member
6719 type, set the TYPE_MAIN_VARIANT for this type to be the
6720 unqualified type. Since they are actually RECORD_TYPEs that are
6721 not variants of each other, we must do this manually. */
6722 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6724 t
= build_qualified_type (t
, cp_type_quals (type
));
6725 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
6726 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
6727 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
6730 /* Cache this pointer-to-member type so that we can find it again
6732 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
6734 /* Managing canonical types for the RECORD_TYPE behind a
6735 pointer-to-member function is a nightmare, so use structural
6736 equality for now. */
6737 SET_TYPE_STRUCTURAL_EQUALITY (t
);
6742 /* Create and return a pointer to data member type. */
6745 build_ptrmem_type (tree class_type
, tree member_type
)
6747 if (TREE_CODE (member_type
) == METHOD_TYPE
)
6751 arg_types
= TYPE_ARG_TYPES (member_type
);
6752 class_type
= (cp_build_qualified_type
6754 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types
)))));
6756 = build_method_type_directly (class_type
,
6757 TREE_TYPE (member_type
),
6758 TREE_CHAIN (arg_types
));
6759 return build_ptrmemfunc_type (build_pointer_type (member_type
));
6763 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
6764 return build_offset_type (class_type
, member_type
);
6768 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6769 Check to see that the definition is valid. Issue appropriate error
6770 messages. Return 1 if the definition is particularly bad, or 0
6774 check_static_variable_definition (tree decl
, tree type
)
6776 /* Motion 10 at San Diego: If a static const integral data member is
6777 initialized with an integral constant expression, the initializer
6778 may appear either in the declaration (within the class), or in
6779 the definition, but not both. If it appears in the class, the
6780 member is a member constant. The file-scope definition is always
6782 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
6784 error ("invalid in-class initialization of static data member "
6785 "of non-integral type %qT",
6787 /* If we just return the declaration, crashes will sometimes
6788 occur. We therefore return void_type_node, as if this were a
6789 friend declaration, to cause callers to completely ignore
6790 this declaration. */
6793 else if (!CP_TYPE_CONST_P (type
))
6794 error ("ISO C++ forbids in-class initialization of non-const "
6795 "static member %qD",
6797 else if (pedantic
&& !INTEGRAL_TYPE_P (type
))
6798 pedwarn ("ISO C++ forbids initialization of member constant "
6799 "%qD of non-integral type %qT", decl
, type
);
6804 /* Given the SIZE (i.e., number of elements) in an array, compute an
6805 appropriate index type for the array. If non-NULL, NAME is the
6806 name of the thing being declared. */
6809 compute_array_index_type (tree name
, tree size
)
6813 tree abi_1_itype
= NULL_TREE
;
6815 if (error_operand_p (size
))
6816 return error_mark_node
;
6818 type
= TREE_TYPE (size
);
6819 /* The array bound must be an integer type. */
6820 if (!dependent_type_p (type
) && !INTEGRAL_TYPE_P (type
))
6823 error ("size of array %qD has non-integral type %qT", name
, type
);
6825 error ("size of array has non-integral type %qT", type
);
6826 size
= integer_one_node
;
6827 type
= TREE_TYPE (size
);
6830 if (value_dependent_expression_p (size
))
6832 /* We cannot do any checking for a value-dependent SIZE. Just
6833 build the index type and mark that it requires structural
6835 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
6836 size
, integer_one_node
));
6837 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
6841 if (!abi_version_at_least (2) && processing_template_decl
)
6842 /* For abi-1, we handled all instances in templates the same way,
6843 even when they were non-dependent. This effects the manglings
6844 produced. So, we do the normal checking for non-dependent
6845 sizes, but at the end we'll return the same type that abi-1
6846 would have, but with TYPE_CANONICAL set to the "right"
6847 value that the current ABI would provide. */
6848 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
6849 size
, integer_one_node
));
6851 /* The size might be the result of a cast. */
6852 STRIP_TYPE_NOPS (size
);
6854 /* It might be a const variable or enumeration constant. */
6855 size
= integral_constant_value (size
);
6857 /* Normally, the array-bound will be a constant. */
6858 if (TREE_CODE (size
) == INTEGER_CST
)
6860 /* Check to see if the array bound overflowed. Make that an
6861 error, no matter how generous we're being. */
6862 int old_flag_pedantic_errors
= flag_pedantic_errors
;
6863 int old_pedantic
= pedantic
;
6864 pedantic
= flag_pedantic_errors
= 1;
6865 constant_expression_warning (size
);
6866 pedantic
= old_pedantic
;
6867 flag_pedantic_errors
= old_flag_pedantic_errors
;
6869 /* An array must have a positive number of elements. */
6870 if (INT_CST_LT (size
, integer_zero_node
))
6873 error ("size of array %qD is negative", name
);
6875 error ("size of array is negative");
6876 size
= integer_one_node
;
6878 /* As an extension we allow zero-sized arrays. We always allow
6879 them in system headers because glibc uses them. */
6880 else if (integer_zerop (size
) && pedantic
&& !in_system_header
)
6883 pedwarn ("ISO C++ forbids zero-size array %qD", name
);
6885 pedwarn ("ISO C++ forbids zero-size array");
6888 else if (TREE_CONSTANT (size
))
6890 /* `(int) &fn' is not a valid array bound. */
6892 error ("size of array %qD is not an integral constant-expression",
6895 error ("size of array is not an integral constant-expression");
6896 size
= integer_one_node
;
6898 else if (pedantic
&& warn_vla
!= 0)
6901 pedwarn ("ISO C++ forbids variable length array %qD", name
);
6903 pedwarn ("ISO C++ forbids variable length array");
6905 else if (warn_vla
> 0)
6909 "variable length array %qD is used", name
);
6912 "variable length array is used");
6915 if (processing_template_decl
&& !TREE_CONSTANT (size
))
6916 /* A variable sized array. */
6917 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
6920 HOST_WIDE_INT saved_processing_template_decl
;
6922 /* Compute the index of the largest element in the array. It is
6923 one less than the number of elements in the array. We save
6924 and restore PROCESSING_TEMPLATE_DECL so that computations in
6925 cp_build_binary_op will be appropriately folded. */
6926 saved_processing_template_decl
= processing_template_decl
;
6927 processing_template_decl
= 0;
6928 itype
= cp_build_binary_op (MINUS_EXPR
,
6929 cp_convert (ssizetype
, size
),
6930 cp_convert (ssizetype
, integer_one_node
));
6931 itype
= fold (itype
);
6932 processing_template_decl
= saved_processing_template_decl
;
6934 if (!TREE_CONSTANT (itype
))
6935 /* A variable sized array. */
6936 itype
= variable_size (itype
);
6937 /* Make sure that there was no overflow when creating to a signed
6938 index type. (For example, on a 32-bit machine, an array with
6939 size 2^32 - 1 is too big.) */
6940 else if (TREE_CODE (itype
) == INTEGER_CST
6941 && TREE_OVERFLOW (itype
))
6943 error ("overflow in array dimension");
6944 TREE_OVERFLOW (itype
) = 0;
6948 /* Create and return the appropriate index type. */
6951 tree t
= build_index_type (itype
);
6952 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
6956 return build_index_type (itype
);
6959 /* Returns the scope (if any) in which the entity declared by
6960 DECLARATOR will be located. If the entity was declared with an
6961 unqualified name, NULL_TREE is returned. */
6964 get_scope_of_declarator (const cp_declarator
*declarator
)
6966 while (declarator
&& declarator
->kind
!= cdk_id
)
6967 declarator
= declarator
->declarator
;
6969 /* If the declarator-id is a SCOPE_REF, the scope in which the
6970 declaration occurs is the first operand. */
6972 && declarator
->u
.id
.qualifying_scope
)
6973 return declarator
->u
.id
.qualifying_scope
;
6975 /* Otherwise, the declarator is not a qualified name; the entity will
6976 be declared in the current scope. */
6980 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6981 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6985 create_array_type_for_decl (tree name
, tree type
, tree size
)
6987 tree itype
= NULL_TREE
;
6988 const char* error_msg
;
6990 /* If things have already gone awry, bail now. */
6991 if (type
== error_mark_node
|| size
== error_mark_node
)
6992 return error_mark_node
;
6994 /* Assume that everything will go OK. */
6997 /* There are some types which cannot be array elements. */
6998 switch (TREE_CODE (type
))
7001 error_msg
= "array of void";
7005 error_msg
= "array of functions";
7008 case REFERENCE_TYPE
:
7009 error_msg
= "array of references";
7013 error_msg
= "array of function members";
7020 /* If something went wrong, issue an error-message and return. */
7024 error ("declaration of %qD as %s", name
, error_msg
);
7026 error ("creating %s", error_msg
);
7028 return error_mark_node
;
7033 The constant expressions that specify the bounds of the arrays
7034 can be omitted only for the first member of the sequence. */
7035 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
7038 error ("declaration of %qD as multidimensional array must "
7039 "have bounds for all dimensions except the first",
7042 error ("multidimensional array must have bounds for all "
7043 "dimensions except the first");
7045 return error_mark_node
;
7048 /* Figure out the index type for the array. */
7050 itype
= compute_array_index_type (name
, size
);
7053 T is called the array element type; this type shall not be [...] an
7054 abstract class type. */
7055 abstract_virtuals_error (name
, type
);
7057 return build_cplus_array_type (type
, itype
);
7060 /* Check that it's OK to declare a function with the indicated TYPE.
7061 SFK indicates the kind of special function (if any) that this
7062 function is. OPTYPE is the type given in a conversion operator
7063 declaration, or the class type for a constructor/destructor.
7064 Returns the actual return type of the function; that
7065 may be different than TYPE if an error occurs, or for certain
7066 special functions. */
7069 check_special_function_return_type (special_function_kind sfk
,
7075 case sfk_constructor
:
7077 error ("return type specification for constructor invalid");
7079 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
7080 type
= build_pointer_type (optype
);
7082 type
= void_type_node
;
7085 case sfk_destructor
:
7087 error ("return type specification for destructor invalid");
7088 /* We can't use the proper return type here because we run into
7089 problems with ambiguous bases and covariant returns.
7090 Java classes are left unchanged because (void *) isn't a valid
7091 Java type, and we don't want to change the Java ABI. */
7092 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
7093 type
= build_pointer_type (void_type_node
);
7095 type
= void_type_node
;
7098 case sfk_conversion
:
7100 error ("return type specified for %<operator %T%>", optype
);
7111 /* A variable or data member (whose unqualified name is IDENTIFIER)
7112 has been declared with the indicated TYPE. If the TYPE is not
7113 acceptable, issue an error message and return a type to use for
7114 error-recovery purposes. */
7117 check_var_type (tree identifier
, tree type
)
7119 if (VOID_TYPE_P (type
))
7122 error ("unnamed variable or field declared void");
7123 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
7125 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
7126 error ("variable or field %qE declared void", identifier
);
7129 error ("variable or field declared void");
7130 type
= error_mark_node
;
7136 /* Given declspecs and a declarator (abstract or otherwise), determine
7137 the name and type of the object declared and construct a DECL node
7140 DECLSPECS points to the representation of declaration-specifier
7141 sequence that precedes declarator.
7143 DECL_CONTEXT says which syntactic context this declaration is in:
7144 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7145 FUNCDEF for a function definition. Like NORMAL but a few different
7146 error messages in each case. Return value may be zero meaning
7147 this definition is too screwy to try to parse.
7148 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7149 handle member functions (which have FIELD context).
7150 Return value may be zero meaning this definition is too screwy to
7152 PARM for a parameter declaration (either within a function prototype
7153 or before a function body). Make a PARM_DECL, or return void_type_node.
7154 CATCHPARM for a parameter declaration before a catch clause.
7155 TYPENAME if for a typename (in a cast or sizeof).
7156 Don't make a DECL node; just return the ..._TYPE node.
7157 FIELD for a struct or union field; make a FIELD_DECL.
7158 BITFIELD for a field with specified width.
7159 INITIALIZED is 1 if the decl has an initializer.
7161 ATTRLIST is a pointer to the list of attributes, which may be NULL
7162 if there are none; *ATTRLIST may be modified if attributes from inside
7163 the declarator should be applied to the declaration.
7165 When this function is called, scoping variables (such as
7166 CURRENT_CLASS_TYPE) should reflect the scope in which the
7167 declaration occurs, not the scope in which the new declaration will
7168 be placed. For example, on:
7172 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7175 Returns a DECL (if a declarator is present), a TYPE (if there is no
7176 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7180 grokdeclarator (const cp_declarator
*declarator
,
7181 const cp_decl_specifier_seq
*declspecs
,
7182 enum decl_context decl_context
,
7186 tree type
= NULL_TREE
;
7188 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
7189 int explicit_int
= 0;
7190 int explicit_char
= 0;
7191 int defaulted_int
= 0;
7192 tree dependent_name
= NULL_TREE
;
7194 tree typedef_decl
= NULL_TREE
;
7195 const char *name
= NULL
;
7196 tree typedef_type
= NULL_TREE
;
7197 /* True if this declarator is a function definition. */
7198 bool funcdef_flag
= false;
7199 cp_declarator_kind innermost_code
= cdk_error
;
7202 /* See the code below that used this. */
7203 tree decl_attr
= NULL_TREE
;
7206 /* Keep track of what sort of function is being processed
7207 so that we can warn about default return values, or explicit
7208 return values which do not match prescribed defaults. */
7209 special_function_kind sfk
= sfk_none
;
7211 tree dname
= NULL_TREE
;
7212 tree ctor_return_type
= NULL_TREE
;
7213 enum overload_flags flags
= NO_SPECIAL
;
7214 /* cv-qualifiers that apply to the declarator, for a declaration of
7215 a member function. */
7216 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
7217 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7219 tree raises
= NULL_TREE
;
7220 int template_count
= 0;
7221 tree returned_attrs
= NULL_TREE
;
7222 tree parms
= NULL_TREE
;
7223 const cp_declarator
*id_declarator
;
7224 /* The unqualified name of the declarator; either an
7225 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7226 tree unqualified_id
;
7227 /* The class type, if any, in which this entity is located,
7228 or NULL_TREE if none. Note that this value may be different from
7229 the current class type; for example if an attempt is made to declare
7230 "A::f" inside "B", this value will be "A". */
7231 tree ctype
= current_class_type
;
7232 /* The NAMESPACE_DECL for the namespace in which this entity is
7233 located. If an unqualified name is used to declare the entity,
7234 this value will be NULL_TREE, even if the entity is located at
7236 tree in_namespace
= NULL_TREE
;
7237 cp_storage_class storage_class
;
7238 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
7239 bool type_was_error_mark_node
= false;
7240 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
7241 bool set_no_warning
= false;
7243 signed_p
= declspecs
->specs
[(int)ds_signed
];
7244 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
7245 short_p
= declspecs
->specs
[(int)ds_short
];
7246 long_p
= declspecs
->specs
[(int)ds_long
];
7247 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
7248 thread_p
= declspecs
->specs
[(int)ds_thread
];
7250 if (decl_context
== FUNCDEF
)
7251 funcdef_flag
= true, decl_context
= NORMAL
;
7252 else if (decl_context
== MEMFUNCDEF
)
7253 funcdef_flag
= true, decl_context
= FIELD
;
7254 else if (decl_context
== BITFIELD
)
7255 bitfield
= 1, decl_context
= FIELD
;
7257 /* Look inside a declarator for the name being declared
7258 and get it as a string, for an error message. */
7259 for (id_declarator
= declarator
;
7261 id_declarator
= id_declarator
->declarator
)
7263 if (id_declarator
->kind
!= cdk_id
)
7264 innermost_code
= id_declarator
->kind
;
7266 switch (id_declarator
->kind
)
7269 if (id_declarator
->declarator
7270 && id_declarator
->declarator
->kind
== cdk_id
)
7272 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
7273 if (sfk
== sfk_destructor
)
7280 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
7281 tree decl
= id_declarator
->u
.id
.unqualified_name
;
7284 if (qualifying_scope
)
7286 if (at_function_scope_p ())
7290 A declarator-id shall not be qualified except
7293 None of the cases are permitted in block
7295 if (qualifying_scope
== global_namespace
)
7296 error ("invalid use of qualified-name %<::%D%>",
7298 else if (TYPE_P (qualifying_scope
))
7299 error ("invalid use of qualified-name %<%T::%D%>",
7300 qualifying_scope
, decl
);
7302 error ("invalid use of qualified-name %<%D::%D%>",
7303 qualifying_scope
, decl
);
7304 return error_mark_node
;
7306 else if (TYPE_P (qualifying_scope
))
7308 ctype
= qualifying_scope
;
7309 if (innermost_code
!= cdk_function
7310 && current_class_type
7311 && !UNIQUELY_DERIVED_FROM_P (ctype
,
7312 current_class_type
))
7314 error ("type %qT is not derived from type %qT",
7315 ctype
, current_class_type
);
7316 return error_mark_node
;
7319 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
7320 in_namespace
= qualifying_scope
;
7322 switch (TREE_CODE (decl
))
7328 if (innermost_code
!= cdk_function
)
7330 error ("declaration of %qD as non-function", decl
);
7331 return error_mark_node
;
7333 else if (!qualifying_scope
7334 && !(current_class_type
&& at_class_scope_p ()))
7336 error ("declaration of %qD as non-member", decl
);
7337 return error_mark_node
;
7340 type
= TREE_OPERAND (decl
, 0);
7341 name
= IDENTIFIER_POINTER (constructor_name (type
));
7346 case TEMPLATE_ID_EXPR
:
7348 tree fns
= TREE_OPERAND (decl
, 0);
7351 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
7353 gcc_assert (is_overloaded_fn (dname
));
7354 dname
= DECL_NAME (get_first_fn (dname
));
7359 case IDENTIFIER_NODE
:
7360 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
7363 if (C_IS_RESERVED_WORD (dname
))
7365 error ("declarator-id missing; using reserved word %qD",
7367 name
= IDENTIFIER_POINTER (dname
);
7369 else if (!IDENTIFIER_TYPENAME_P (dname
))
7370 name
= IDENTIFIER_POINTER (dname
);
7373 gcc_assert (flags
== NO_SPECIAL
);
7374 flags
= TYPENAME_FLAG
;
7375 ctor_return_type
= TREE_TYPE (dname
);
7376 sfk
= sfk_conversion
;
7377 if (is_typename_at_global_scope (dname
))
7378 name
= IDENTIFIER_POINTER (dname
);
7380 name
= "<invalid operator>";
7397 return error_mark_node
;
7402 if (id_declarator
->kind
== cdk_id
)
7408 The declarator in a function-definition shall have the form
7409 D1 ( parameter-declaration-clause) ... */
7410 if (funcdef_flag
&& innermost_code
!= cdk_function
)
7412 error ("function definition does not declare parameters");
7413 return error_mark_node
;
7416 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
7417 && innermost_code
!= cdk_function
7418 && ! (ctype
&& !declspecs
->any_specifiers_p
))
7420 error ("declaration of %qD as non-function", dname
);
7421 return error_mark_node
;
7424 /* Anything declared one level down from the top level
7425 must be one of the parameters of a function
7426 (because the body is at least two levels down). */
7428 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7429 by not allowing C++ class definitions to specify their parameters
7430 with xdecls (must be spec.d in the parmlist).
7432 Since we now wait to push a class scope until we are sure that
7433 we are in a legitimate method context, we must set oldcname
7434 explicitly (since current_class_name is not yet alive).
7436 We also want to avoid calling this a PARM if it is in a namespace. */
7438 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
7440 struct cp_binding_level
*b
= current_binding_level
;
7441 current_binding_level
= b
->level_chain
;
7442 if (current_binding_level
!= 0 && toplevel_bindings_p ())
7443 decl_context
= PARM
;
7444 current_binding_level
= b
;
7448 name
= decl_context
== PARM
? "parameter" : "type name";
7450 /* If there were multiple types specified in the decl-specifier-seq,
7451 issue an error message. */
7452 if (declspecs
->multiple_types_p
)
7454 error ("two or more data types in declaration of %qs", name
);
7455 return error_mark_node
;
7458 /* Extract the basic type from the decl-specifier-seq. */
7459 type
= declspecs
->type
;
7460 if (type
== error_mark_node
)
7463 type_was_error_mark_node
= true;
7465 /* If the entire declaration is itself tagged as deprecated then
7466 suppress reports of deprecated items. */
7467 if (type
&& TREE_DEPRECATED (type
)
7468 && deprecated_state
!= DEPRECATED_SUPPRESS
)
7469 warn_deprecated_use (type
);
7470 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
7472 typedef_decl
= type
;
7473 type
= TREE_TYPE (typedef_decl
);
7475 /* No type at all: default to `int', and set DEFAULTED_INT
7476 because it was not a user-defined typedef. */
7477 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
7479 /* These imply 'int'. */
7480 type
= integer_type_node
;
7484 explicit_int
= declspecs
->explicit_int_p
;
7485 explicit_char
= declspecs
->explicit_char_p
;
7488 /* See the code below that used this. */
7490 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
7492 typedef_type
= type
;
7495 if (sfk
!= sfk_conversion
)
7496 ctor_return_type
= ctype
;
7498 if (sfk
!= sfk_none
)
7499 type
= check_special_function_return_type (sfk
, type
,
7501 else if (type
== NULL_TREE
)
7507 /* We handle `main' specially here, because 'main () { }' is so
7508 common. With no options, it is allowed. With -Wreturn-type,
7509 it is a warning. It is only an error with -pedantic-errors. */
7510 is_main
= (funcdef_flag
7511 && dname
&& MAIN_NAME_P (dname
)
7512 && ctype
== NULL_TREE
7513 && in_namespace
== NULL_TREE
7514 && current_namespace
== global_namespace
);
7516 if (type_was_error_mark_node
)
7517 /* We've already issued an error, don't complain more. */;
7518 else if (in_system_header
|| flag_ms_extensions
)
7519 /* Allow it, sigh. */;
7520 else if (pedantic
|| ! is_main
)
7521 pedwarn ("ISO C++ forbids declaration of %qs with no type", name
);
7523 warning (OPT_Wreturn_type
,
7524 "ISO C++ forbids declaration of %qs with no type", name
);
7526 type
= integer_type_node
;
7531 /* Now process the modifiers that were specified
7532 and check for invalid combinations. */
7534 /* Long double is a special combination. */
7535 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
7538 type
= build_qualified_type (long_double_type_node
,
7539 cp_type_quals (type
));
7542 /* Check all other uses of type modifiers. */
7544 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
7548 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
7549 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
7550 else if (signed_p
&& unsigned_p
)
7551 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
7552 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
7553 error ("%<long long%> invalid for %qs", name
);
7554 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
7555 error ("%<long%> invalid for %qs", name
);
7556 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
7557 error ("%<short%> invalid for %qs", name
);
7558 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
7559 error ("%<long%> or %<short%> invalid for %qs", name
);
7560 else if ((long_p
|| short_p
) && explicit_char
)
7561 error ("%<long%> or %<short%> specified with char for %qs", name
);
7562 else if (long_p
&& short_p
)
7563 error ("%<long%> and %<short%> specified together for %qs", name
);
7567 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& pedantic
)
7569 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7571 if (flag_pedantic_errors
)
7576 /* Discard the type modifiers if they are invalid. */
7587 /* Decide whether an integer type is signed or not.
7588 Optionally treat bitfields as signed by default. */
7592 It is implementation-defined whether a plain (neither
7593 explicitly signed or unsigned) char, short, int, or long
7594 bit-field is signed or unsigned.
7596 Naturally, we extend this to long long as well. Note that
7597 this does not include wchar_t. */
7598 || (bitfield
&& !flag_signed_bitfields
7600 /* A typedef for plain `int' without `signed' can be
7601 controlled just like plain `int', but a typedef for
7602 `signed int' cannot be so controlled. */
7604 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
7605 && TREE_CODE (type
) == INTEGER_TYPE
7606 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
7609 type
= long_long_unsigned_type_node
;
7611 type
= long_unsigned_type_node
;
7613 type
= short_unsigned_type_node
;
7614 else if (type
== char_type_node
)
7615 type
= unsigned_char_type_node
;
7616 else if (typedef_decl
)
7617 type
= unsigned_type_for (type
);
7619 type
= unsigned_type_node
;
7621 else if (signed_p
&& type
== char_type_node
)
7622 type
= signed_char_type_node
;
7624 type
= long_long_integer_type_node
;
7626 type
= long_integer_type_node
;
7628 type
= short_integer_type_node
;
7630 if (declspecs
->specs
[(int)ds_complex
])
7632 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
7633 error ("complex invalid for %qs", name
);
7634 /* If we just have "complex", it is equivalent to
7635 "complex double", but if any modifiers at all are specified it is
7636 the complex form of TYPE. E.g, "complex short" is
7637 "complex short int". */
7639 else if (defaulted_int
&& ! longlong
7640 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
7641 type
= complex_double_type_node
;
7642 else if (type
== integer_type_node
)
7643 type
= complex_integer_type_node
;
7644 else if (type
== float_type_node
)
7645 type
= complex_float_type_node
;
7646 else if (type
== double_type_node
)
7647 type
= complex_double_type_node
;
7648 else if (type
== long_double_type_node
)
7649 type
= complex_long_double_type_node
;
7651 type
= build_complex_type (type
);
7654 type_quals
= TYPE_UNQUALIFIED
;
7655 if (declspecs
->specs
[(int)ds_const
])
7656 type_quals
|= TYPE_QUAL_CONST
;
7657 if (declspecs
->specs
[(int)ds_volatile
])
7658 type_quals
|= TYPE_QUAL_VOLATILE
;
7659 if (declspecs
->specs
[(int)ds_restrict
])
7660 type_quals
|= TYPE_QUAL_RESTRICT
;
7661 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
7662 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7665 if (TREE_CODE (type
) == FUNCTION_TYPE
7666 && type_quals
!= TYPE_UNQUALIFIED
)
7668 /* This was an error in C++98 (cv-qualifiers cannot be added to
7669 a function type), but DR 295 makes the code well-formed by
7670 dropping the extra qualifiers. */
7673 tree bad_type
= build_qualified_type (type
, type_quals
);
7674 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7677 type_quals
= TYPE_UNQUALIFIED
;
7679 type_quals
|= cp_type_quals (type
);
7680 type
= cp_build_qualified_type_real
7681 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
7682 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
7683 /* We might have ignored or rejected some of the qualifiers. */
7684 type_quals
= cp_type_quals (type
);
7687 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
7688 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
7689 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
7691 storage_class
= declspecs
->storage_class
;
7692 if (storage_class
== sc_static
)
7693 staticp
= 1 + (decl_context
== FIELD
);
7695 if (virtualp
&& staticp
== 2)
7697 error ("member %qD cannot be declared both virtual and static", dname
);
7698 storage_class
= sc_none
;
7701 friendp
= !! declspecs
->specs
[(int)ds_friend
];
7703 if (dependent_name
&& !friendp
)
7705 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
7706 return error_mark_node
;
7709 /* Issue errors about use of storage classes for parameters. */
7710 if (decl_context
== PARM
)
7712 if (declspecs
->specs
[(int)ds_typedef
])
7714 error ("typedef declaration invalid in parameter declaration");
7715 return error_mark_node
;
7717 else if (storage_class
== sc_static
7718 || storage_class
== sc_extern
7720 error ("storage class specifiers invalid in parameter declarations");
7723 /* Give error if `virtual' is used outside of class declaration. */
7725 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
7727 error ("virtual outside class declaration");
7731 /* Static anonymous unions are dealt with here. */
7732 if (staticp
&& decl_context
== TYPENAME
7734 && ANON_AGGR_TYPE_P (declspecs
->type
))
7735 decl_context
= FIELD
;
7737 /* Warn about storage classes that are invalid for certain
7738 kinds of declarations (parameters, typenames, etc.). */
7741 && storage_class
!= sc_extern
7742 && storage_class
!= sc_static
)
7743 || declspecs
->specs
[(int)ds_typedef
]))
7745 error ("multiple storage classes in declaration of %qs", name
);
7748 if (declspecs
->conflicting_specifiers_p
)
7750 error ("conflicting specifiers in declaration of %qs", name
);
7751 storage_class
= sc_none
;
7753 else if (decl_context
!= NORMAL
7754 && ((storage_class
!= sc_none
7755 && storage_class
!= sc_mutable
)
7758 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
7759 && (storage_class
== sc_register
7760 || storage_class
== sc_auto
))
7762 else if (declspecs
->specs
[(int)ds_typedef
])
7764 else if (decl_context
== FIELD
7765 /* C++ allows static class elements. */
7766 && storage_class
== sc_static
)
7767 /* C++ also allows inlines and signed and unsigned elements,
7768 but in those cases we don't come in here. */
7772 if (decl_context
== FIELD
)
7773 error ("storage class specified for %qs", name
);
7776 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7777 error ("storage class specified for parameter %qs", name
);
7779 error ("storage class specified for typename");
7781 if (storage_class
== sc_register
7782 || storage_class
== sc_auto
7783 || storage_class
== sc_extern
7785 storage_class
= sc_none
;
7788 else if (storage_class
== sc_extern
&& initialized
7791 if (toplevel_bindings_p ())
7793 /* It's common practice (and completely valid) to have a const
7794 be initialized and declared extern. */
7795 if (!(type_quals
& TYPE_QUAL_CONST
))
7796 warning (0, "%qs initialized and declared %<extern%>", name
);
7799 error ("%qs has both %<extern%> and initializer", name
);
7801 else if (storage_class
== sc_extern
&& funcdef_flag
7802 && ! toplevel_bindings_p ())
7803 error ("nested function %qs declared %<extern%>", name
);
7804 else if (toplevel_bindings_p ())
7806 if (storage_class
== sc_auto
)
7807 error ("top-level declaration of %qs specifies %<auto%>", name
);
7810 && storage_class
!= sc_extern
7811 && storage_class
!= sc_static
)
7813 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7818 if (storage_class
&& friendp
)
7819 error ("storage class specifiers invalid in friend function declarations");
7822 unqualified_id
= NULL_TREE
;
7825 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
7826 switch (TREE_CODE (unqualified_id
))
7830 = constructor_name (TREE_OPERAND (unqualified_id
, 0));
7833 case IDENTIFIER_NODE
:
7834 case TEMPLATE_ID_EXPR
:
7842 /* Determine the type of the entity declared by recurring on the
7844 for (; declarator
; declarator
= declarator
->declarator
)
7846 const cp_declarator
*inner_declarator
;
7849 if (type
== error_mark_node
)
7850 return error_mark_node
;
7852 attrs
= declarator
->attributes
;
7858 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
7859 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
7860 if (declarator
->kind
== cdk_function
)
7861 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
7862 if (declarator
->kind
== cdk_array
)
7863 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
7864 returned_attrs
= decl_attributes (&type
,
7865 chainon (returned_attrs
, attrs
),
7869 if (declarator
->kind
== cdk_id
)
7872 inner_declarator
= declarator
->declarator
;
7874 switch (declarator
->kind
)
7877 type
= create_array_type_for_decl (dname
, type
,
7878 declarator
->u
.array
.bounds
);
7886 /* Declaring a function type.
7887 Make sure we have a valid type for the function to return. */
7889 if (type_quals
!= TYPE_UNQUALIFIED
)
7891 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
7892 warning (OPT_Wreturn_type
,
7893 "type qualifiers ignored on function return type");
7894 /* We now know that the TYPE_QUALS don't apply to the
7895 decl, but to its return type. */
7896 type_quals
= TYPE_UNQUALIFIED
;
7897 set_no_warning
= true;
7900 /* Warn about some types functions can't return. */
7902 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7904 error ("%qs declared as function returning a function", name
);
7905 type
= integer_type_node
;
7907 if (TREE_CODE (type
) == ARRAY_TYPE
)
7909 error ("%qs declared as function returning an array", name
);
7910 type
= integer_type_node
;
7913 /* Pick up type qualifiers which should be applied to `this'. */
7914 memfn_quals
= declarator
->u
.function
.qualifiers
;
7916 /* Pick up the exception specifications. */
7917 raises
= declarator
->u
.function
.exception_specification
;
7919 /* Say it's a definition only for the CALL_EXPR
7920 closest to the identifier. */
7921 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
7923 if (ctype
== NULL_TREE
7924 && decl_context
== FIELD
7926 && (friendp
== 0 || dname
== current_class_name
))
7927 ctype
= current_class_type
;
7929 if (ctype
&& (sfk
== sfk_constructor
7930 || sfk
== sfk_destructor
))
7932 /* We are within a class's scope. If our declarator name
7933 is the same as the class name, and we are defining
7934 a function, then it is a constructor/destructor, and
7935 therefore returns a void type. */
7937 /* ISO C++ 12.4/2. A destructor may not be declared
7938 const or volatile. A destructor may not be
7941 ISO C++ 12.1. A constructor may not be declared
7942 const or volatile. A constructor may not be
7943 virtual. A constructor may not be static. */
7945 error ((flags
== DTOR_FLAG
)
7946 ? "destructor cannot be static member function"
7947 : "constructor cannot be static member function");
7950 error ((flags
== DTOR_FLAG
)
7951 ? "destructors may not be cv-qualified"
7952 : "constructors may not be cv-qualified");
7953 memfn_quals
= TYPE_UNQUALIFIED
;
7956 if (decl_context
== FIELD
7957 && !member_function_or_else (ctype
,
7960 return error_mark_node
;
7962 if (flags
!= DTOR_FLAG
)
7964 /* It's a constructor. */
7969 pedwarn ("constructors cannot be declared virtual");
7972 if (decl_context
== FIELD
7973 && sfk
!= sfk_constructor
)
7974 return error_mark_node
;
7976 if (decl_context
== FIELD
)
7982 error ("can't initialize friend function %qs", name
);
7985 /* Cannot be both friend and virtual. */
7986 error ("virtual functions cannot be friends");
7989 if (decl_context
== NORMAL
)
7990 error ("friend declaration not in class definition");
7991 if (current_function_decl
&& funcdef_flag
)
7992 error ("can't define friend function %qs in a local "
7997 arg_types
= grokparms (declarator
->u
.function
.parameters
,
8000 if (inner_declarator
8001 && inner_declarator
->kind
== cdk_id
8002 && inner_declarator
->u
.id
.sfk
== sfk_destructor
8003 && arg_types
!= void_list_node
)
8005 error ("destructors may not have parameters");
8006 arg_types
= void_list_node
;
8010 type
= build_function_type (type
, arg_types
);
8017 /* Filter out pointers-to-references and references-to-references.
8018 We can get these if a TYPE_DECL is used. */
8020 if (TREE_CODE (type
) == REFERENCE_TYPE
)
8022 if (declarator
->kind
!= cdk_reference
)
8024 error ("cannot declare pointer to %q#T", type
);
8025 type
= TREE_TYPE (type
);
8028 /* In C++0x, we allow reference to reference declarations
8029 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8030 and template type arguments [14.3.1/4 temp.arg.type]. The
8031 check for direct reference to reference declarations, which
8032 are still forbidden, occurs below. Reasoning behind the change
8033 can be found in DR106, DR540, and the rvalue reference
8035 else if (cxx_dialect
== cxx98
)
8037 error ("cannot declare reference to %q#T", type
);
8038 type
= TREE_TYPE (type
);
8041 else if (VOID_TYPE_P (type
))
8043 if (declarator
->kind
== cdk_reference
)
8044 error ("cannot declare reference to %q#T", type
);
8045 else if (declarator
->kind
== cdk_ptrmem
)
8046 error ("cannot declare pointer to %q#T member", type
);
8049 /* We now know that the TYPE_QUALS don't apply to the decl,
8050 but to the target of the pointer. */
8051 type_quals
= TYPE_UNQUALIFIED
;
8053 if (declarator
->kind
== cdk_ptrmem
8054 && (TREE_CODE (type
) == FUNCTION_TYPE
|| memfn_quals
))
8056 memfn_quals
|= cp_type_quals (type
);
8057 type
= build_memfn_type (type
,
8058 declarator
->u
.pointer
.class_type
,
8060 memfn_quals
= TYPE_UNQUALIFIED
;
8063 if (declarator
->kind
== cdk_reference
)
8065 /* In C++0x, the type we are creating a reference to might be
8066 a typedef which is itself a reference type. In that case,
8067 we follow the reference collapsing rules in
8068 [7.1.3/8 dcl.typedef] to create the final reference type:
8070 "If a typedef TD names a type that is a reference to a type
8071 T, an attempt to create the type 'lvalue reference to cv TD'
8072 creates the type 'lvalue reference to T,' while an attempt
8073 to create the type "rvalue reference to cv TD' creates the
8076 if (!VOID_TYPE_P (type
))
8077 type
= cp_build_reference_type
8078 ((TREE_CODE (type
) == REFERENCE_TYPE
8079 ? TREE_TYPE (type
) : type
),
8080 (declarator
->u
.reference
.rvalue_ref
8081 && (TREE_CODE(type
) != REFERENCE_TYPE
8082 || TYPE_REF_IS_RVALUE (type
))));
8084 /* In C++0x, we need this check for direct reference to
8085 reference declarations, which are forbidden by
8086 [8.3.2/5 dcl.ref]. Reference to reference declarations
8087 are only allowed indirectly through typedefs and template
8088 type arguments. Example:
8090 void foo(int & &); // invalid ref-to-ref decl
8092 typedef int & int_ref;
8093 void foo(int_ref &); // valid ref-to-ref decl
8095 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
8096 error ("cannot declare reference to %q#T, which is not "
8097 "a typedef or a template type argument", type
);
8099 else if (TREE_CODE (type
) == METHOD_TYPE
)
8100 type
= build_ptrmemfunc_type (build_pointer_type (type
));
8101 else if (declarator
->kind
== cdk_ptrmem
)
8103 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
8105 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
8106 /* We will already have complained. */
8107 type
= error_mark_node
;
8109 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
8113 type
= build_pointer_type (type
);
8115 /* Process a list of type modifier keywords (such as
8116 const or volatile) that were given inside the `*' or `&'. */
8118 if (declarator
->u
.pointer
.qualifiers
)
8121 = cp_build_qualified_type (type
,
8122 declarator
->u
.pointer
.qualifiers
);
8123 type_quals
= cp_type_quals (type
);
8136 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
8137 && TREE_CODE (type
) != FUNCTION_TYPE
8138 && TREE_CODE (type
) != METHOD_TYPE
)
8140 error ("template-id %qD used as a declarator",
8142 unqualified_id
= dname
;
8145 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8146 qualified with a class-name, turn it into a METHOD_TYPE, unless
8147 we know that the function is static. We take advantage of this
8148 opportunity to do other processing that pertains to entities
8149 explicitly declared to be class members. Note that if DECLARATOR
8150 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8151 would not have exited the loop above. */
8153 && declarator
->u
.id
.qualifying_scope
8154 && TYPE_P (declarator
->u
.id
.qualifying_scope
))
8158 ctype
= declarator
->u
.id
.qualifying_scope
;
8159 ctype
= TYPE_MAIN_VARIANT (ctype
);
8161 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
8163 /* You're supposed to have one `template <...>' for every
8164 template class, but you don't need one for a full
8165 specialization. For example:
8167 template <class T> struct S{};
8168 template <> struct S<int> { void f(); };
8169 void S<int>::f () {}
8171 is correct; there shouldn't be a `template <>' for the
8172 definition of `S<int>::f'. */
8173 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
8174 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
8175 /* T is an explicit (not partial) specialization. All
8176 containing classes must therefore also be explicitly
8179 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
8180 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
8181 template_count
+= 1;
8183 t
= TYPE_MAIN_DECL (t
);
8184 t
= DECL_CONTEXT (t
);
8187 if (ctype
== current_class_type
)
8191 pedwarn ("member functions are implicitly friends of their class");
8195 pedwarn ("extra qualification %<%T::%> on member %qs",
8198 else if (/* If the qualifying type is already complete, then we
8199 can skip the following checks. */
8200 !COMPLETE_TYPE_P (ctype
)
8201 && (/* If the function is being defined, then
8202 qualifying type must certainly be complete. */
8204 /* A friend declaration of "T::f" is OK, even if
8205 "T" is a template parameter. But, if this
8206 function is not a friend, the qualifying type
8208 || (!friendp
&& !CLASS_TYPE_P (ctype
))
8209 /* For a declaration, the type need not be
8210 complete, if either it is dependent (since there
8211 is no meaningful definition of complete in that
8212 case) or the qualifying class is currently being
8214 || !(dependent_type_p (ctype
)
8215 || currently_open_class (ctype
)))
8216 /* Check that the qualifying type is complete. */
8217 && !complete_type_or_else (ctype
, NULL_TREE
))
8218 return error_mark_node
;
8219 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
8221 tree sname
= declarator
->u
.id
.unqualified_name
;
8223 if (current_class_type
8224 && (!friendp
|| funcdef_flag
))
8227 ? "cannot define member function %<%T::%s%> within %<%T%>"
8228 : "cannot declare member function %<%T::%s%> within %<%T%>",
8229 ctype
, name
, current_class_type
);
8230 return error_mark_node
;
8233 if (TREE_CODE (sname
) == IDENTIFIER_NODE
8234 && NEW_DELETE_OPNAME_P (sname
))
8235 /* Overloaded operator new and operator delete
8236 are always static functions. */
8239 type
= build_memfn_type (type
, ctype
, memfn_quals
);
8241 else if (declspecs
->specs
[(int)ds_typedef
]
8242 && current_class_type
)
8244 error ("cannot declare member %<%T::%s%> within %qT",
8245 ctype
, name
, current_class_type
);
8246 return error_mark_node
;
8250 /* Now TYPE has the actual type. */
8255 *attrlist
= chainon (returned_attrs
, *attrlist
);
8257 attrlist
= &returned_attrs
;
8260 /* Handle parameter packs. */
8261 if (parameter_pack_p
)
8263 if (decl_context
== PARM
)
8264 /* Turn the type into a pack expansion.*/
8265 type
= make_pack_expansion (type
);
8267 error ("non-parameter %qs cannot be a parameter pack", name
);
8270 /* Did array size calculations overflow? */
8272 if (TREE_CODE (type
) == ARRAY_TYPE
8273 && COMPLETE_TYPE_P (type
)
8274 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
8275 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
8277 error ("size of array %qs is too large", name
);
8278 /* If we proceed with the array type as it is, we'll eventually
8279 crash in tree_low_cst(). */
8280 type
= error_mark_node
;
8283 if ((decl_context
== FIELD
|| decl_context
== PARM
)
8284 && !processing_template_decl
8285 && variably_modified_type_p (type
, NULL_TREE
))
8287 if (decl_context
== FIELD
)
8288 error ("data member may not have variably modified type %qT", type
);
8290 error ("parameter may not have variably modified type %qT", type
);
8291 type
= error_mark_node
;
8294 if (explicitp
== 1 || (explicitp
&& friendp
))
8296 /* [dcl.fct.spec] The explicit specifier shall only be used in
8297 declarations of constructors within a class definition. */
8298 error ("only declarations of constructors can be %<explicit%>");
8302 if (storage_class
== sc_mutable
)
8304 if (decl_context
!= FIELD
|| friendp
)
8306 error ("non-member %qs cannot be declared %<mutable%>", name
);
8307 storage_class
= sc_none
;
8309 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
8311 error ("non-object member %qs cannot be declared %<mutable%>", name
);
8312 storage_class
= sc_none
;
8314 else if (TREE_CODE (type
) == FUNCTION_TYPE
8315 || TREE_CODE (type
) == METHOD_TYPE
)
8317 error ("function %qs cannot be declared %<mutable%>", name
);
8318 storage_class
= sc_none
;
8322 error ("static %qs cannot be declared %<mutable%>", name
);
8323 storage_class
= sc_none
;
8325 else if (type_quals
& TYPE_QUAL_CONST
)
8327 error ("const %qs cannot be declared %<mutable%>", name
);
8328 storage_class
= sc_none
;
8332 /* If this is declaring a typedef name, return a TYPE_DECL. */
8333 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
8337 /* Note that the grammar rejects storage classes
8338 in typenames, fields or parameters. */
8339 if (current_lang_name
== lang_name_java
)
8340 TYPE_FOR_JAVA (type
) = 1;
8342 /* This declaration:
8344 typedef void f(int) const;
8346 declares a function type which is not a member of any
8347 particular class, but which is cv-qualified; for
8348 example "f S::*" declares a pointer to a const-qualified
8349 member function of S. We record the cv-qualification in the
8351 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
8353 type
= cp_build_qualified_type (type
, memfn_quals
);
8355 /* We have now dealt with these qualifiers. */
8356 memfn_quals
= TYPE_UNQUALIFIED
;
8359 if (decl_context
== FIELD
)
8360 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
8362 decl
= build_decl (TYPE_DECL
, unqualified_id
, type
);
8363 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
)
8364 error ("%Jtypedef name may not be a nested-name-specifier", decl
);
8366 if (decl_context
!= FIELD
)
8368 if (!current_function_decl
)
8369 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
8370 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
8371 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8372 (current_function_decl
)))
8373 /* The TYPE_DECL is "abstract" because there will be
8374 clones of this constructor/destructor, and there will
8375 be copies of this TYPE_DECL generated in those
8377 DECL_ABSTRACT (decl
) = 1;
8379 else if (constructor_name_p (unqualified_id
, current_class_type
))
8380 pedwarn ("ISO C++ forbids nested type %qD with same name "
8381 "as enclosing class",
8384 /* If the user declares "typedef struct {...} foo" then the
8385 struct will have an anonymous name. Fill that name in now.
8386 Nothing can refer to it, so nothing needs know about the name
8388 if (type
!= error_mark_node
8391 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
8392 && TYPE_ANONYMOUS_P (type
)
8393 /* Don't do this if there are attributes. */
8394 && (!attrlist
|| !*attrlist
)
8395 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
8397 tree oldname
= TYPE_NAME (type
);
8400 /* Replace the anonymous name with the real name everywhere. */
8401 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
8402 if (TYPE_NAME (t
) == oldname
)
8403 TYPE_NAME (t
) = decl
;
8405 if (TYPE_LANG_SPECIFIC (type
))
8406 TYPE_WAS_ANONYMOUS (type
) = 1;
8408 /* If this is a typedef within a template class, the nested
8409 type is a (non-primary) template. The name for the
8410 template needs updating as well. */
8411 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
8412 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
8413 = TYPE_IDENTIFIER (type
);
8415 /* FIXME remangle member functions; member functions of a
8416 type with external linkage have external linkage. */
8420 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
8421 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
8423 bad_specifiers (decl
, "type", virtualp
,
8424 memfn_quals
!= TYPE_UNQUALIFIED
,
8425 inlinep
, friendp
, raises
!= NULL_TREE
);
8430 /* Detect the case of an array type of unspecified size
8431 which came, as such, direct from a typedef name.
8432 We must copy the type, so that the array's domain can be
8433 individually set by the object's initializer. */
8435 if (type
&& typedef_type
8436 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
8437 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
8438 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
8440 /* Detect where we're using a typedef of function type to declare a
8441 function. PARMS will not be set, so we must create it now. */
8443 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
8445 tree decls
= NULL_TREE
;
8448 for (args
= TYPE_ARG_TYPES (type
); args
; args
= TREE_CHAIN (args
))
8450 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
8452 TREE_CHAIN (decl
) = decls
;
8456 parms
= nreverse (decls
);
8458 if (decl_context
!= TYPENAME
)
8460 /* A cv-qualifier-seq shall only be part of the function type
8461 for a non-static member function. [8.3.5/4 dcl.fct] */
8462 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
8463 && (current_class_type
== NULL_TREE
|| staticp
) )
8466 ? G_("qualified function types cannot be used to "
8467 "declare static member functions")
8468 : G_("qualified function types cannot be used to "
8469 "declare free functions"));
8470 type
= TYPE_MAIN_VARIANT (type
);
8473 /* The qualifiers on the function type become the qualifiers on
8474 the non-static member function. */
8475 memfn_quals
|= cp_type_quals (type
);
8479 /* If this is a type name (such as, in a cast or sizeof),
8480 compute the type and return it now. */
8482 if (decl_context
== TYPENAME
)
8484 /* Note that the grammar rejects storage classes
8485 in typenames, fields or parameters. */
8486 if (type_quals
!= TYPE_UNQUALIFIED
)
8487 type_quals
= TYPE_UNQUALIFIED
;
8489 /* Special case: "friend class foo" looks like a TYPENAME context. */
8492 if (type_quals
!= TYPE_UNQUALIFIED
)
8494 error ("type qualifiers specified for friend class declaration");
8495 type_quals
= TYPE_UNQUALIFIED
;
8499 error ("%<inline%> specified for friend class declaration");
8505 /* Don't allow friend declaration without a class-key. */
8506 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
8507 pedwarn ("template parameters cannot be friends");
8508 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
8509 pedwarn ("friend declaration requires class-key, "
8510 "i.e. %<friend class %T::%D%>",
8511 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
8513 pedwarn ("friend declaration requires class-key, "
8514 "i.e. %<friend %#T%>",
8518 /* Only try to do this stuff if we didn't already give up. */
8519 if (type
!= integer_type_node
)
8521 /* A friendly class? */
8522 if (current_class_type
)
8523 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
8526 error ("trying to make class %qT a friend of global scope",
8529 type
= void_type_node
;
8532 else if (memfn_quals
)
8534 if (ctype
== NULL_TREE
)
8536 if (TREE_CODE (type
) != METHOD_TYPE
)
8537 error ("invalid qualifiers on non-member function type");
8539 ctype
= TYPE_METHOD_BASETYPE (type
);
8542 type
= build_memfn_type (type
, ctype
, memfn_quals
);
8547 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
8548 && decl_context
!= CATCHPARM
8549 && TREE_CODE (type
) != UNION_TYPE
8552 error ("abstract declarator %qT used as declaration", type
);
8553 return error_mark_node
;
8556 /* Only functions may be declared using an operator-function-id. */
8558 && IDENTIFIER_OPNAME_P (unqualified_id
)
8559 && TREE_CODE (type
) != FUNCTION_TYPE
8560 && TREE_CODE (type
) != METHOD_TYPE
)
8562 error ("declaration of %qD as non-function", unqualified_id
);
8563 return error_mark_node
;
8566 /* We don't check parameter types here because we can emit a better
8567 error message later. */
8568 if (decl_context
!= PARM
)
8570 type
= check_var_type (unqualified_id
, type
);
8571 if (type
== error_mark_node
)
8572 return error_mark_node
;
8575 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8576 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8578 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8580 if (ctype
|| in_namespace
)
8581 error ("cannot use %<::%> in parameter declaration");
8583 /* A parameter declared as an array of T is really a pointer to T.
8584 One declared as a function is really a pointer to a function.
8585 One declared as a member is really a pointer to member. */
8587 if (TREE_CODE (type
) == ARRAY_TYPE
)
8589 /* Transfer const-ness of array into that of type pointed to. */
8590 type
= build_pointer_type (TREE_TYPE (type
));
8591 type_quals
= TYPE_UNQUALIFIED
;
8593 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
8594 type
= build_pointer_type (type
);
8600 if (decl_context
== PARM
)
8602 decl
= cp_build_parm_decl (unqualified_id
, type
);
8604 bad_specifiers (decl
, "parameter", virtualp
,
8605 memfn_quals
!= TYPE_UNQUALIFIED
,
8606 inlinep
, friendp
, raises
!= NULL_TREE
);
8608 else if (decl_context
== FIELD
)
8610 /* The C99 flexible array extension. */
8611 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
8612 && TYPE_DOMAIN (type
) == NULL_TREE
)
8614 tree itype
= compute_array_index_type (dname
, integer_zero_node
);
8615 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
8618 if (type
== error_mark_node
)
8620 /* Happens when declaring arrays of sizes which
8621 are error_mark_node, for example. */
8624 else if (in_namespace
&& !friendp
)
8626 /* Something like struct S { int N::j; }; */
8627 error ("invalid use of %<::%>");
8628 return error_mark_node
;
8630 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
8633 tree function_context
;
8637 if (ctype
== NULL_TREE
)
8638 ctype
= current_class_type
;
8640 if (ctype
== NULL_TREE
)
8642 error ("can't make %qD into a method -- not in a class",
8644 return error_mark_node
;
8647 /* ``A union may [ ... ] not [ have ] virtual functions.''
8649 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
8651 error ("function %qD declared virtual inside a union",
8653 return error_mark_node
;
8656 if (NEW_DELETE_OPNAME_P (unqualified_id
))
8660 error ("%qD cannot be declared virtual, since it "
8666 else if (staticp
< 2)
8667 type
= build_memfn_type (type
, ctype
, memfn_quals
);
8670 /* Check that the name used for a destructor makes sense. */
8671 if (sfk
== sfk_destructor
)
8675 gcc_assert (friendp
);
8676 error ("expected qualified name in friend declaration "
8677 "for destructor %qD",
8678 id_declarator
->u
.id
.unqualified_name
);
8679 return error_mark_node
;
8682 if (!same_type_p (TREE_OPERAND
8683 (id_declarator
->u
.id
.unqualified_name
, 0),
8686 error ("declaration of %qD as member of %qT",
8687 id_declarator
->u
.id
.unqualified_name
, ctype
);
8688 return error_mark_node
;
8692 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8693 function_context
= (ctype
!= NULL_TREE
) ?
8694 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
8695 publicp
= (! friendp
|| ! staticp
)
8696 && function_context
== NULL_TREE
;
8697 decl
= grokfndecl (ctype
, type
,
8698 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
8699 ? unqualified_id
: dname
,
8702 virtualp
, flags
, memfn_quals
, raises
,
8703 friendp
? -1 : 0, friendp
, publicp
, inlinep
,
8705 funcdef_flag
, template_count
, in_namespace
, attrlist
);
8706 if (decl
== NULL_TREE
)
8707 return error_mark_node
;
8709 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8710 /* The decl and setting of decl_attr is also turned off. */
8711 decl
= build_decl_attribute_variant (decl
, decl_attr
);
8714 /* [class.conv.ctor]
8716 A constructor declared without the function-specifier
8717 explicit that can be called with a single parameter
8718 specifies a conversion from the type of its first
8719 parameter to the type of its class. Such a constructor
8720 is called a converting constructor. */
8722 DECL_NONCONVERTING_P (decl
) = 1;
8723 else if (DECL_CONSTRUCTOR_P (decl
))
8725 /* The constructor can be called with exactly one
8726 parameter if there is at least one parameter, and
8727 any subsequent parameters have default arguments.
8728 Ignore any compiler-added parms. */
8729 tree arg_types
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
8731 if (arg_types
== void_list_node
8733 && TREE_CHAIN (arg_types
)
8734 && TREE_CHAIN (arg_types
) != void_list_node
8735 && !TREE_PURPOSE (TREE_CHAIN (arg_types
))))
8736 DECL_NONCONVERTING_P (decl
) = 1;
8739 else if (TREE_CODE (type
) == METHOD_TYPE
)
8741 /* We only get here for friend declarations of
8742 members of other classes. */
8743 /* All method decls are public, so tell grokfndecl to set
8744 TREE_PUBLIC, also. */
8745 decl
= grokfndecl (ctype
, type
,
8746 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
8747 ? unqualified_id
: dname
,
8750 virtualp
, flags
, memfn_quals
, raises
,
8751 friendp
? -1 : 0, friendp
, 1, 0, sfk
,
8752 funcdef_flag
, template_count
, in_namespace
,
8754 if (decl
== NULL_TREE
)
8755 return error_mark_node
;
8757 else if (!staticp
&& !dependent_type_p (type
)
8758 && !COMPLETE_TYPE_P (complete_type (type
))
8759 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
8762 error ("field %qD has incomplete type", unqualified_id
);
8764 error ("name %qT has incomplete type", type
);
8766 /* If we're instantiating a template, tell them which
8767 instantiation made the field's type be incomplete. */
8768 if (current_class_type
8769 && TYPE_NAME (current_class_type
)
8770 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type
))
8772 && declspecs
->type
== type
)
8773 error (" in instantiation of template %qT",
8774 current_class_type
);
8776 return error_mark_node
;
8782 error ("%qE is neither function nor member function; "
8783 "cannot be declared friend", unqualified_id
);
8791 /* Friends are treated specially. */
8792 if (ctype
== current_class_type
)
8793 ; /* We already issued a pedwarn. */
8794 else if (decl
&& DECL_NAME (decl
))
8796 if (template_class_depth (current_class_type
) == 0)
8798 decl
= check_explicit_specialization
8799 (unqualified_id
, decl
, template_count
,
8800 2 * funcdef_flag
+ 4);
8801 if (decl
== error_mark_node
)
8802 return error_mark_node
;
8805 decl
= do_friend (ctype
, unqualified_id
, decl
,
8811 return error_mark_node
;
8814 /* Structure field. It may not be a function, except for C++. */
8816 if (decl
== NULL_TREE
)
8822 /* An attempt is being made to initialize a non-static
8823 member. But, from [class.mem]:
8825 4 A member-declarator can contain a
8826 constant-initializer only if it declares a static
8827 member (_class.static_) of integral or enumeration
8828 type, see _class.static.data_.
8830 This used to be relatively common practice, but
8831 the rest of the compiler does not correctly
8832 handle the initialization unless the member is
8833 static so we make it static below. */
8834 pedwarn ("ISO C++ forbids initialization of member %qD",
8836 pedwarn ("making %qD static", unqualified_id
);
8840 if (uses_template_parms (type
))
8841 /* We'll check at instantiation time. */
8843 else if (check_static_variable_definition (unqualified_id
,
8845 /* If we just return the declaration, crashes
8846 will sometimes occur. We therefore return
8847 void_type_node, as if this was a friend
8848 declaration, to cause callers to completely
8849 ignore this declaration. */
8850 return error_mark_node
;
8855 /* C++ allows static class members. All other work
8856 for this is done by grokfield. */
8857 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
8858 set_linkage_for_static_data_member (decl
);
8859 /* Even if there is an in-class initialization, DECL
8860 is considered undefined until an out-of-class
8861 definition is provided. */
8862 DECL_EXTERNAL (decl
) = 1;
8865 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
8869 decl
= build_decl (FIELD_DECL
, unqualified_id
, type
);
8870 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
8871 if (bitfield
&& !unqualified_id
)
8872 TREE_NO_WARNING (decl
) = 1;
8874 if (storage_class
== sc_mutable
)
8876 DECL_MUTABLE_P (decl
) = 1;
8877 storage_class
= sc_none
;
8881 bad_specifiers (decl
, "field", virtualp
,
8882 memfn_quals
!= TYPE_UNQUALIFIED
,
8883 inlinep
, friendp
, raises
!= NULL_TREE
);
8886 else if (TREE_CODE (type
) == FUNCTION_TYPE
8887 || TREE_CODE (type
) == METHOD_TYPE
)
8892 if (!unqualified_id
)
8893 return error_mark_node
;
8895 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
8896 original_name
= dname
;
8898 original_name
= unqualified_id
;
8900 if (storage_class
== sc_auto
)
8901 error ("storage class %<auto%> invalid for function %qs", name
);
8902 else if (storage_class
== sc_register
)
8903 error ("storage class %<register%> invalid for function %qs", name
);
8905 error ("storage class %<__thread%> invalid for function %qs", name
);
8907 /* Function declaration not at top level.
8908 Storage classes other than `extern' are not allowed
8909 and `extern' makes no difference. */
8910 if (! toplevel_bindings_p ()
8911 && (storage_class
== sc_static
8912 || declspecs
->specs
[(int)ds_inline
])
8915 if (storage_class
== sc_static
)
8916 pedwarn ("%<static%> specified invalid for function %qs "
8917 "declared out of global scope", name
);
8919 pedwarn ("%<inline%> specifier invalid for function %qs "
8920 "declared out of global scope", name
);
8923 if (ctype
== NULL_TREE
)
8927 error ("virtual non-class function %qs", name
);
8931 else if (TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
8932 && !NEW_DELETE_OPNAME_P (original_name
))
8933 type
= build_method_type_directly (ctype
,
8935 TYPE_ARG_TYPES (type
));
8937 /* Record presence of `static'. */
8938 publicp
= (ctype
!= NULL_TREE
8939 || storage_class
== sc_extern
8940 || storage_class
!= sc_static
);
8942 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
8943 virtualp
, flags
, memfn_quals
, raises
,
8945 publicp
, inlinep
, sfk
, funcdef_flag
,
8946 template_count
, in_namespace
, attrlist
);
8947 if (decl
== NULL_TREE
)
8948 return error_mark_node
;
8952 int invalid_static
= 0;
8954 /* Don't allow a static member function in a class, and forbid
8955 declaring main to be static. */
8956 if (TREE_CODE (type
) == METHOD_TYPE
)
8958 pedwarn ("cannot declare member function %qD to have "
8959 "static linkage", decl
);
8962 else if (current_function_decl
)
8964 /* FIXME need arm citation */
8965 error ("cannot declare static function inside another function");
8972 storage_class
= sc_none
;
8978 /* It's a variable. */
8980 /* An uninitialized decl with `extern' is a reference. */
8981 decl
= grokvardecl (type
, unqualified_id
,
8984 (type_quals
& TYPE_QUAL_CONST
) != 0,
8985 ctype
? ctype
: in_namespace
);
8986 bad_specifiers (decl
, "variable", virtualp
,
8987 memfn_quals
!= TYPE_UNQUALIFIED
,
8988 inlinep
, friendp
, raises
!= NULL_TREE
);
8992 DECL_CONTEXT (decl
) = ctype
;
8995 pedwarn ("%<static%> may not be used when defining "
8996 "(as opposed to declaring) a static data member");
8998 storage_class
= sc_none
;
9000 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
9002 error ("static member %qD declared %<register%>", decl
);
9003 storage_class
= sc_none
;
9005 if (storage_class
== sc_extern
&& pedantic
)
9007 pedwarn ("cannot explicitly declare member %q#D to have "
9010 storage_class
= sc_none
;
9015 /* Record `register' declaration for warnings on &
9016 and in case doing stupid register allocation. */
9018 if (storage_class
== sc_register
)
9019 DECL_REGISTER (decl
) = 1;
9020 else if (storage_class
== sc_extern
)
9021 DECL_THIS_EXTERN (decl
) = 1;
9022 else if (storage_class
== sc_static
)
9023 DECL_THIS_STATIC (decl
) = 1;
9025 /* Record constancy and volatility. There's no need to do this
9026 when processing a template; we'll do this for the instantiated
9027 declaration based on the type of DECL. */
9028 if (!processing_template_decl
)
9029 cp_apply_type_quals_to_decl (type_quals
, decl
);
9032 TREE_NO_WARNING (decl
) = 1;
9038 /* Subroutine of start_function. Ensure that each of the parameter
9039 types (as listed in PARMS) is complete, as is required for a
9040 function definition. */
9043 require_complete_types_for_parms (tree parms
)
9045 for (; parms
; parms
= TREE_CHAIN (parms
))
9047 if (dependent_type_p (TREE_TYPE (parms
)))
9049 if (!VOID_TYPE_P (TREE_TYPE (parms
))
9050 && complete_type_or_else (TREE_TYPE (parms
), parms
))
9052 relayout_decl (parms
);
9053 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
9056 /* grokparms or complete_type_or_else will have already issued
9058 TREE_TYPE (parms
) = error_mark_node
;
9062 /* Returns nonzero if T is a local variable. */
9065 local_variable_p (const_tree t
)
9067 if ((TREE_CODE (t
) == VAR_DECL
9068 /* A VAR_DECL with a context that is a _TYPE is a static data
9070 && !TYPE_P (CP_DECL_CONTEXT (t
))
9071 /* Any other non-local variable must be at namespace scope. */
9072 && !DECL_NAMESPACE_SCOPE_P (t
))
9073 || (TREE_CODE (t
) == PARM_DECL
))
9079 /* Like local_variable_p, but suitable for use as a tree-walking
9083 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
9084 void *data ATTRIBUTE_UNUSED
)
9086 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
9088 else if (TYPE_P (*tp
))
9095 /* Check that ARG, which is a default-argument expression for a
9096 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9097 something goes wrong. DECL may also be a _TYPE node, rather than a
9098 DECL, if there is no DECL available. */
9101 check_default_argument (tree decl
, tree arg
)
9106 if (TREE_CODE (arg
) == DEFAULT_ARG
)
9107 /* We get a DEFAULT_ARG when looking at an in-class declaration
9108 with a default argument. Ignore the argument for now; we'll
9109 deal with it after the class is complete. */
9118 decl_type
= TREE_TYPE (decl
);
9120 if (arg
== error_mark_node
9121 || decl
== error_mark_node
9122 || TREE_TYPE (arg
) == error_mark_node
9123 || decl_type
== error_mark_node
)
9124 /* Something already went wrong. There's no need to check
9126 return error_mark_node
;
9128 /* [dcl.fct.default]
9130 A default argument expression is implicitly converted to the
9132 if (!TREE_TYPE (arg
)
9133 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
9136 error ("default argument for %q#D has type %qT",
9137 decl
, TREE_TYPE (arg
));
9139 error ("default argument for parameter of type %qT has type %qT",
9140 decl_type
, TREE_TYPE (arg
));
9142 return error_mark_node
;
9145 /* [dcl.fct.default]
9147 Local variables shall not be used in default argument
9150 The keyword `this' shall not be used in a default argument of a
9152 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
9155 error ("default argument %qE uses local variable %qD", arg
, var
);
9156 return error_mark_node
;
9163 /* Decode the list of parameter types for a function type.
9164 Given the list of things declared inside the parens,
9165 return a list of types.
9167 If this parameter does not end with an ellipsis, we append
9170 *PARMS is set to the chain of PARM_DECLs created. */
9173 grokparms (cp_parameter_declarator
*first_parm
, tree
*parms
)
9175 tree result
= NULL_TREE
;
9176 tree decls
= NULL_TREE
;
9177 int ellipsis
= !first_parm
|| first_parm
->ellipsis_p
;
9178 cp_parameter_declarator
*parm
;
9180 struct pointer_set_t
*unique_decls
= pointer_set_create ();
9182 for (parm
= first_parm
; parm
!= NULL
; parm
= parm
->next
)
9184 tree type
= NULL_TREE
;
9185 tree init
= parm
->default_argument
;
9189 if (parm
== no_parameters
)
9192 attrs
= parm
->decl_specifiers
.attributes
;
9193 parm
->decl_specifiers
.attributes
= NULL_TREE
;
9194 decl
= grokdeclarator (parm
->declarator
, &parm
->decl_specifiers
,
9195 PARM
, init
!= NULL_TREE
, &attrs
);
9196 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
9200 cplus_decl_attributes (&decl
, attrs
, 0);
9202 type
= TREE_TYPE (decl
);
9203 if (VOID_TYPE_P (type
))
9205 if (same_type_p (type
, void_type_node
)
9206 && DECL_SELF_REFERENCE_P (type
)
9207 && !DECL_NAME (decl
) && !result
&& !parm
->next
&& !ellipsis
)
9208 /* this is a parmlist of `(void)', which is ok. */
9210 cxx_incomplete_type_error (decl
, type
);
9211 /* It's not a good idea to actually create parameters of
9212 type `void'; other parts of the compiler assume that a
9213 void type terminates the parameter list. */
9214 type
= error_mark_node
;
9215 TREE_TYPE (decl
) = error_mark_node
;
9218 if (type
!= error_mark_node
)
9220 /* Top-level qualifiers on the parameters are
9221 ignored for function types. */
9222 type
= cp_build_qualified_type (type
, 0);
9223 if (TREE_CODE (type
) == METHOD_TYPE
)
9225 error ("parameter %qD invalidly declared method type", decl
);
9226 type
= build_pointer_type (type
);
9227 TREE_TYPE (decl
) = type
;
9229 else if (abstract_virtuals_error (decl
, type
))
9230 any_error
= 1; /* Seems like a good idea. */
9231 else if (POINTER_TYPE_P (type
))
9233 /* [dcl.fct]/6, parameter types cannot contain pointers
9234 (references) to arrays of unknown bound. */
9235 tree t
= TREE_TYPE (type
);
9236 int ptr
= TYPE_PTR_P (type
);
9242 else if (TREE_CODE (t
) != ARRAY_TYPE
)
9244 else if (!TYPE_DOMAIN (t
))
9248 if (TREE_CODE (t
) == ARRAY_TYPE
)
9249 error ("parameter %qD includes %s to array of unknown "
9251 decl
, ptr
? "pointer" : "reference", t
);
9256 else if (init
&& !processing_template_decl
)
9257 init
= check_default_argument (decl
, init
);
9260 if (TREE_CODE (decl
) == PARM_DECL
9261 && FUNCTION_PARAMETER_PACK_P (decl
)
9263 error ("parameter packs must be at the end of the parameter list");
9265 if (DECL_NAME (decl
))
9267 if (pointer_set_contains (unique_decls
, DECL_NAME (decl
)))
9268 error ("multiple parameters named %qE", DECL_NAME (decl
));
9270 pointer_set_insert (unique_decls
, DECL_NAME (decl
));
9273 TREE_CHAIN (decl
) = decls
;
9275 result
= tree_cons (init
, type
, result
);
9277 decls
= nreverse (decls
);
9278 result
= nreverse (result
);
9280 result
= chainon (result
, void_list_node
);
9283 pointer_set_destroy (unique_decls
);
9288 /* D is a constructor or overloaded `operator='.
9290 Let T be the class in which D is declared. Then, this function
9293 -1 if D's is an ill-formed constructor or copy assignment operator
9294 whose first parameter is of type `T'.
9295 0 if D is not a copy constructor or copy assignment
9297 1 if D is a copy constructor or copy assignment operator whose
9298 first parameter is a reference to const qualified T.
9299 2 if D is a copy constructor or copy assignment operator whose
9300 first parameter is a reference to non-const qualified T.
9302 This function can be used as a predicate. Positive values indicate
9303 a copy constructor and nonzero values indicate a copy assignment
9307 copy_fn_p (const_tree d
)
9313 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
9315 if (TREE_CODE (d
) == TEMPLATE_DECL
9316 || (DECL_TEMPLATE_INFO (d
)
9317 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
9318 /* Instantiations of template member functions are never copy
9319 functions. Note that member functions of templated classes are
9320 represented as template functions internally, and we must
9321 accept those as copy functions. */
9324 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
9328 arg_type
= TREE_VALUE (args
);
9329 if (arg_type
== error_mark_node
)
9332 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
9334 /* Pass by value copy assignment operator. */
9337 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
9338 && !TYPE_REF_IS_RVALUE (arg_type
)
9339 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
9341 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
9347 args
= TREE_CHAIN (args
);
9349 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
9350 /* There are more non-optional args. */
9356 /* D is a constructor or overloaded `operator='.
9358 Let T be the class in which D is declared. Then, this function
9359 returns true when D is a move constructor or move assignment
9360 operator, false otherwise. */
9363 move_fn_p (const_tree d
)
9367 bool result
= false;
9369 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
9371 if (cxx_dialect
== cxx98
)
9372 /* There are no move constructors if we are in C++98 mode. */
9375 if (TREE_CODE (d
) == TEMPLATE_DECL
9376 || (DECL_TEMPLATE_INFO (d
)
9377 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
9378 /* Instantiations of template member functions are never copy
9379 functions. Note that member functions of templated classes are
9380 represented as template functions internally, and we must
9381 accept those as copy functions. */
9384 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
9388 arg_type
= TREE_VALUE (args
);
9389 if (arg_type
== error_mark_node
)
9392 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
9393 && TYPE_REF_IS_RVALUE (arg_type
)
9394 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
9398 args
= TREE_CHAIN (args
);
9400 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
9401 /* There are more non-optional args. */
9407 /* Remember any special properties of member function DECL. */
9409 void grok_special_member_properties (tree decl
)
9413 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
9416 class_type
= DECL_CONTEXT (decl
);
9417 if (DECL_CONSTRUCTOR_P (decl
))
9419 int ctor
= copy_fn_p (decl
);
9421 TYPE_HAS_CONSTRUCTOR (class_type
) = 1;
9427 A non-template constructor for class X is a copy
9428 constructor if its first parameter is of type X&, const
9429 X&, volatile X& or const volatile X&, and either there
9430 are no other parameters or else all other parameters have
9431 default arguments. */
9432 TYPE_HAS_INIT_REF (class_type
) = 1;
9434 TYPE_HAS_CONST_INIT_REF (class_type
) = 1;
9436 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
9437 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
9439 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
9443 A non-template assignment operator for class X is a copy
9444 assignment operator if its parameter is of type X, X&, const
9445 X&, volatile X& or const volatile X&. */
9447 int assop
= copy_fn_p (decl
);
9451 TYPE_HAS_ASSIGN_REF (class_type
) = 1;
9453 TYPE_HAS_CONST_ASSIGN_REF (class_type
) = 1;
9458 /* Check a constructor DECL has the correct form. Complains
9459 if the class has a constructor of the form X(X). */
9462 grok_ctor_properties (const_tree ctype
, const_tree decl
)
9464 int ctor_parm
= copy_fn_p (decl
);
9470 A declaration of a constructor for a class X is ill-formed if
9471 its first parameter is of type (optionally cv-qualified) X
9472 and either there are no other parameters or else all other
9473 parameters have default arguments.
9475 We *don't* complain about member template instantiations that
9476 have this form, though; they can occur as we try to decide
9477 what constructor to use during overload resolution. Since
9478 overload resolution will never prefer such a constructor to
9479 the non-template copy constructor (which is either explicitly
9480 or implicitly defined), there's no need to worry about their
9481 existence. Theoretically, they should never even be
9482 instantiated, but that's hard to forestall. */
9483 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9491 /* An operator with this code is unary, but can also be binary. */
9494 ambi_op_p (enum tree_code code
)
9496 return (code
== INDIRECT_REF
9497 || code
== ADDR_EXPR
9498 || code
== UNARY_PLUS_EXPR
9499 || code
== NEGATE_EXPR
9500 || code
== PREINCREMENT_EXPR
9501 || code
== PREDECREMENT_EXPR
);
9504 /* An operator with this name can only be unary. */
9507 unary_op_p (enum tree_code code
)
9509 return (code
== TRUTH_NOT_EXPR
9510 || code
== BIT_NOT_EXPR
9511 || code
== COMPONENT_REF
9512 || code
== TYPE_EXPR
);
9515 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9516 errors are issued for invalid declarations. */
9519 grok_op_properties (tree decl
, bool complain
)
9521 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
9523 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
9524 tree name
= DECL_NAME (decl
);
9525 enum tree_code operator_code
;
9530 /* Count the number of arguments and check for ellipsis. */
9531 for (argtype
= argtypes
, arity
= 0;
9532 argtype
&& argtype
!= void_list_node
;
9533 argtype
= TREE_CHAIN (argtype
))
9535 ellipsis_p
= !argtype
;
9537 class_type
= DECL_CONTEXT (decl
);
9538 if (class_type
&& !CLASS_TYPE_P (class_type
))
9539 class_type
= NULL_TREE
;
9541 if (DECL_CONV_FN_P (decl
))
9542 operator_code
= TYPE_EXPR
;
9546 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9547 if (ansi_opname (CODE) == name) \
9549 operator_code = (CODE); \
9552 else if (ansi_assopname (CODE) == name) \
9554 operator_code = (CODE); \
9555 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9559 #include "operators.def"
9565 gcc_assert (operator_code
!= LAST_CPLUS_TREE_CODE
);
9566 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
9569 switch (operator_code
)
9572 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
9576 TYPE_GETS_DELETE (class_type
) |= 1;
9580 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
9583 case VEC_DELETE_EXPR
:
9584 TYPE_GETS_DELETE (class_type
) |= 2;
9591 /* [basic.std.dynamic.allocation]/1:
9593 A program is ill-formed if an allocation function is declared
9594 in a namespace scope other than global scope or declared static
9597 The same also holds true for deallocation functions. */
9598 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
9599 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
9601 if (DECL_NAMESPACE_SCOPE_P (decl
))
9603 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
9605 error ("%qD may not be declared within a namespace", decl
);
9608 else if (!TREE_PUBLIC (decl
))
9610 error ("%qD may not be declared as static", decl
);
9616 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
9617 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
9618 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
9619 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
9622 /* An operator function must either be a non-static member function
9623 or have at least one parameter of a class, a reference to a class,
9624 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9625 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
9627 if (operator_code
== TYPE_EXPR
9628 || operator_code
== CALL_EXPR
9629 || operator_code
== COMPONENT_REF
9630 || operator_code
== ARRAY_REF
9631 || operator_code
== NOP_EXPR
)
9633 error ("%qD must be a nonstatic member function", decl
);
9640 if (DECL_STATIC_FUNCTION_P (decl
))
9642 error ("%qD must be either a non-static member "
9643 "function or a non-member function", decl
);
9647 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
9649 tree arg
= non_reference (TREE_VALUE (p
));
9650 if (arg
== error_mark_node
)
9653 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9654 because these checks are performed even on
9655 template functions. */
9656 if (IS_AGGR_TYPE (arg
) || TREE_CODE (arg
) == ENUMERAL_TYPE
)
9660 if (!p
|| p
== void_list_node
)
9663 error ("%qD must have an argument of class or "
9664 "enumerated type", decl
);
9670 /* There are no restrictions on the arguments to an overloaded
9672 if (operator_code
== CALL_EXPR
)
9675 /* Warn about conversion operators that will never be used. */
9676 if (IDENTIFIER_TYPENAME_P (name
)
9677 && ! DECL_TEMPLATE_INFO (decl
)
9679 /* Warn only declaring the function; there is no need to
9680 warn again about out-of-class definitions. */
9681 && class_type
== current_class_type
)
9683 tree t
= TREE_TYPE (name
);
9684 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
9685 const char *what
= 0;
9688 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
9690 if (TREE_CODE (t
) == VOID_TYPE
)
9692 else if (class_type
)
9694 if (t
== class_type
)
9695 what
= "the same type";
9696 /* Don't force t to be complete here. */
9697 else if (IS_AGGR_TYPE (t
)
9698 && COMPLETE_TYPE_P (t
)
9699 && DERIVED_FROM_P (t
, class_type
))
9700 what
= "a base class";
9704 warning (OPT_Wconversion
, "conversion to %s%s will never use a type "
9705 "conversion operator",
9706 ref
? "a reference to " : "", what
);
9709 if (operator_code
== COND_EXPR
)
9712 error ("ISO C++ prohibits overloading operator ?:");
9715 else if (ellipsis_p
)
9717 error ("%qD must not have variable number of arguments", decl
);
9720 else if (ambi_op_p (operator_code
))
9723 /* We pick the one-argument operator codes by default, so
9724 we don't have to change anything. */
9726 else if (arity
== 2)
9728 /* If we thought this was a unary operator, we now know
9729 it to be a binary operator. */
9730 switch (operator_code
)
9733 operator_code
= MULT_EXPR
;
9737 operator_code
= BIT_AND_EXPR
;
9740 case UNARY_PLUS_EXPR
:
9741 operator_code
= PLUS_EXPR
;
9745 operator_code
= MINUS_EXPR
;
9748 case PREINCREMENT_EXPR
:
9749 operator_code
= POSTINCREMENT_EXPR
;
9752 case PREDECREMENT_EXPR
:
9753 operator_code
= POSTDECREMENT_EXPR
;
9760 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
9762 if ((operator_code
== POSTINCREMENT_EXPR
9763 || operator_code
== POSTDECREMENT_EXPR
)
9764 && ! processing_template_decl
9765 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
9768 error ("postfix %qD must take %<int%> as its argument",
9771 error ("postfix %qD must take %<int%> as its second "
9779 error ("%qD must take either zero or one argument", decl
);
9781 error ("%qD must take either one or two arguments", decl
);
9785 /* More Effective C++ rule 6. */
9787 && (operator_code
== POSTINCREMENT_EXPR
9788 || operator_code
== POSTDECREMENT_EXPR
9789 || operator_code
== PREINCREMENT_EXPR
9790 || operator_code
== PREDECREMENT_EXPR
))
9792 tree arg
= TREE_VALUE (argtypes
);
9793 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
9794 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
9795 arg
= TREE_TYPE (arg
);
9796 arg
= TYPE_MAIN_VARIANT (arg
);
9797 if (operator_code
== PREINCREMENT_EXPR
9798 || operator_code
== PREDECREMENT_EXPR
)
9800 if (TREE_CODE (ret
) != REFERENCE_TYPE
9801 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
9803 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
9804 build_reference_type (arg
));
9808 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
9809 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
9813 else if (unary_op_p (operator_code
))
9818 error ("%qD must take %<void%>", decl
);
9820 error ("%qD must take exactly one argument", decl
);
9824 else /* if (binary_op_p (operator_code)) */
9829 error ("%qD must take exactly one argument", decl
);
9831 error ("%qD must take exactly two arguments", decl
);
9835 /* More Effective C++ rule 7. */
9837 && (operator_code
== TRUTH_ANDIF_EXPR
9838 || operator_code
== TRUTH_ORIF_EXPR
9839 || operator_code
== COMPOUND_EXPR
))
9840 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
9844 /* Effective C++ rule 23. */
9847 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
9848 && (operator_code
== PLUS_EXPR
9849 || operator_code
== MINUS_EXPR
9850 || operator_code
== TRUNC_DIV_EXPR
9851 || operator_code
== MULT_EXPR
9852 || operator_code
== TRUNC_MOD_EXPR
)
9853 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
9854 warning (OPT_Weffc__
, "%qD should return by value", decl
);
9857 for (; argtypes
&& argtypes
!= void_list_node
;
9858 argtypes
= TREE_CHAIN (argtypes
))
9859 if (TREE_PURPOSE (argtypes
))
9861 TREE_PURPOSE (argtypes
) = NULL_TREE
;
9862 if (operator_code
== POSTINCREMENT_EXPR
9863 || operator_code
== POSTDECREMENT_EXPR
)
9866 pedwarn ("%qD cannot have default arguments", decl
);
9870 error ("%qD cannot have default arguments", decl
);
9878 /* Return a string giving the keyword associate with CODE. */
9881 tag_name (enum tag_types code
)
9900 /* Name lookup in an elaborated-type-specifier (after the keyword
9901 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9902 elaborated-type-specifier is invalid, issue a diagnostic and return
9903 error_mark_node; otherwise, return the *_TYPE to which it referred.
9904 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9907 check_elaborated_type_specifier (enum tag_types tag_code
,
9909 bool allow_template_p
)
9915 struct S { struct S *p; };
9917 name lookup will find the TYPE_DECL for the implicit "S::S"
9918 typedef. Adjust for that here. */
9919 if (DECL_SELF_REFERENCE_P (decl
))
9920 decl
= TYPE_NAME (TREE_TYPE (decl
));
9922 type
= TREE_TYPE (decl
);
9924 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9925 is false for this case as well. */
9926 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9928 error ("using template type parameter %qT after %qs",
9929 type
, tag_name (tag_code
));
9930 return error_mark_node
;
9934 If the identifier resolves to a typedef-name or a template
9935 type-parameter, the elaborated-type-specifier is ill-formed.
9937 In other words, the only legitimate declaration to use in the
9938 elaborated type specifier is the implicit typedef created when
9939 the type is declared. */
9940 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
9941 && tag_code
!= typename_type
)
9943 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
9944 error ("%q+D has a previous declaration here", decl
);
9945 return error_mark_node
;
9947 else if (TREE_CODE (type
) != RECORD_TYPE
9948 && TREE_CODE (type
) != UNION_TYPE
9949 && tag_code
!= enum_type
9950 && tag_code
!= typename_type
)
9952 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
9953 error ("%q+T has a previous declaration here", type
);
9954 return error_mark_node
;
9956 else if (TREE_CODE (type
) != ENUMERAL_TYPE
9957 && tag_code
== enum_type
)
9959 error ("%qT referred to as enum", type
);
9960 error ("%q+T has a previous declaration here", type
);
9961 return error_mark_node
;
9963 else if (!allow_template_p
9964 && TREE_CODE (type
) == RECORD_TYPE
9965 && CLASSTYPE_IS_TEMPLATE (type
))
9967 /* If a class template appears as elaborated type specifier
9968 without a template header such as:
9970 template <class T> class C {};
9971 void f(class C); // No template header here
9973 then the required template argument is missing. */
9974 error ("template argument required for %<%s %T%>",
9975 tag_name (tag_code
),
9976 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
9977 return error_mark_node
;
9983 /* Lookup NAME in elaborate type specifier in scope according to
9984 SCOPE and issue diagnostics if necessary.
9985 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9986 found, and ERROR_MARK_NODE for type error. */
9989 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
9990 tag_scope scope
, bool template_header_p
)
9994 if (scope
== ts_global
)
9996 /* First try ordinary name lookup, ignoring hidden class name
9997 injected via friend declaration. */
9998 decl
= lookup_name_prefer_type (name
, 2);
9999 /* If that fails, the name will be placed in the smallest
10000 non-class, non-function-prototype scope according to 3.3.1/5.
10001 We may already have a hidden name declared as friend in this
10002 scope. So lookup again but not ignoring hidden names.
10003 If we find one, that name will be made visible rather than
10004 creating a new tag. */
10006 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
10009 decl
= lookup_type_scope (name
, scope
);
10011 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
10012 decl
= DECL_TEMPLATE_RESULT (decl
);
10014 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
10016 /* Look for invalid nested type:
10020 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
10022 error ("%qD has the same name as the class in which it is "
10025 return error_mark_node
;
10028 /* Two cases we need to consider when deciding if a class
10029 template is allowed as an elaborated type specifier:
10030 1. It is a self reference to its own class.
10031 2. It comes with a template header.
10035 template <class T> class C {
10036 class C *c1; // DECL_SELF_REFERENCE_P is true
10039 template <class U> class C; // template_header_p is true
10040 template <class T> class C<T>::D {
10041 class C *c2; // DECL_SELF_REFERENCE_P is true
10044 t
= check_elaborated_type_specifier (tag_code
,
10047 | DECL_SELF_REFERENCE_P (decl
));
10050 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
10052 error ("reference to %qD is ambiguous", name
);
10053 print_candidates (decl
);
10054 return error_mark_node
;
10060 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10061 Define the tag as a forward-reference if it is not defined.
10063 If a declaration is given, process it here, and report an error if
10064 multiple declarations are not identical.
10066 SCOPE is TS_CURRENT when this is also a definition. Only look in
10067 the current frame for the name (since C++ allows new names in any
10068 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10069 declaration. Only look beginning from the current scope outward up
10070 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10072 TEMPLATE_HEADER_P is true when this declaration is preceded by
10073 a set of template parameters. */
10076 xref_tag (enum tag_types tag_code
, tree name
,
10077 tag_scope scope
, bool template_header_p
)
10079 enum tree_code code
;
10081 tree context
= NULL_TREE
;
10083 timevar_push (TV_NAME_LOOKUP
);
10085 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
10091 code
= RECORD_TYPE
;
10097 code
= ENUMERAL_TYPE
;
10100 gcc_unreachable ();
10103 /* In case of anonymous name, xref_tag is only called to
10104 make type node and push name. Name lookup is not required. */
10105 if (ANON_AGGRNAME_P (name
))
10108 t
= lookup_and_check_tag (tag_code
, name
,
10109 scope
, template_header_p
);
10111 if (t
== error_mark_node
)
10112 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10114 if (scope
!= ts_current
&& t
&& current_class_type
10115 && template_class_depth (current_class_type
)
10116 && template_header_p
)
10118 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10119 definition of this tag. Since, in addition, we are currently
10120 processing a (member) template declaration of a template
10121 class, we must be very careful; consider:
10128 { template <class V>
10129 friend struct S1; };
10131 Here, the S2::S1 declaration should not be confused with the
10132 outer declaration. In particular, the inner version should
10133 have a template parameter of level 2, not level 1. This
10134 would be particularly important if the member declaration
10137 template <class V = U> friend struct S1;
10139 say, when we should tsubst into `U' when instantiating
10140 S2. On the other hand, when presented with:
10150 we must find the inner binding eventually. We
10151 accomplish this by making sure that the new type we
10152 create to represent this declaration has the right
10154 context
= TYPE_CONTEXT (t
);
10160 /* If no such tag is yet defined, create a forward-reference node
10161 and record it as the "definition".
10162 When a real declaration of this type is found,
10163 the forward-reference will be altered into a real type. */
10164 if (code
== ENUMERAL_TYPE
)
10166 error ("use of enum %q#D without previous declaration", name
);
10167 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10171 t
= make_aggr_type (code
);
10172 TYPE_CONTEXT (t
) = context
;
10173 t
= pushtag (name
, t
, scope
);
10178 if (template_header_p
&& IS_AGGR_TYPE (t
))
10180 if (!redeclare_class_template (t
, current_template_parms
))
10181 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10183 else if (!processing_template_decl
10184 && CLASS_TYPE_P (t
)
10185 && CLASSTYPE_IS_TEMPLATE (t
))
10187 error ("redeclaration of %qT as a non-template", t
);
10188 error ("previous declaration %q+D", t
);
10189 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10192 /* Make injected friend class visible. */
10193 if (scope
!= ts_within_enclosing_non_class
10194 && hidden_name_p (TYPE_NAME (t
)))
10196 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
10197 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
10199 if (TYPE_TEMPLATE_INFO (t
))
10201 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
10202 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
10207 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, t
);
10211 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
10213 enum tag_types tag_kind
;
10215 if (TREE_CODE (old
) == RECORD_TYPE
)
10216 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
10218 tag_kind
= union_type
;
10220 if (id
== NULL_TREE
)
10221 id
= TYPE_IDENTIFIER (old
);
10223 return xref_tag (tag_kind
, id
, scope
, false);
10226 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10227 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10228 access_* node, and the TREE_VALUE is the type of the base-class.
10229 Non-NULL TREE_TYPE indicates virtual inheritance.
10231 Returns true if the binfo hierarchy was successfully created,
10232 false if an error was detected. */
10235 xref_basetypes (tree ref
, tree base_list
)
10238 tree binfo
, base_binfo
;
10239 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
10240 unsigned max_bases
= 0; /* Maximum direct bases. */
10242 tree default_access
;
10243 tree igo_prev
; /* Track Inheritance Graph Order. */
10245 if (ref
== error_mark_node
)
10248 /* The base of a derived class is private by default, all others are
10250 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
10251 && CLASSTYPE_DECLARED_CLASS (ref
)
10252 ? access_private_node
: access_public_node
);
10254 /* First, make sure that any templates in base-classes are
10255 instantiated. This ensures that if we call ourselves recursively
10256 we do not get confused about which classes are marked and which
10258 basep
= &base_list
;
10261 tree basetype
= TREE_VALUE (*basep
);
10263 if (!(processing_template_decl
&& uses_template_parms (basetype
))
10264 && !complete_type_or_else (basetype
, NULL
))
10265 /* An incomplete type. Remove it from the list. */
10266 *basep
= TREE_CHAIN (*basep
);
10270 if (TREE_TYPE (*basep
))
10272 if (CLASS_TYPE_P (basetype
))
10273 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
10274 basep
= &TREE_CHAIN (*basep
);
10278 TYPE_MARKED_P (ref
) = 1;
10280 /* The binfo slot should be empty, unless this is an (ill-formed)
10282 gcc_assert (!TYPE_BINFO (ref
) || TYPE_SIZE (ref
));
10283 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
10285 binfo
= make_tree_binfo (max_bases
);
10287 TYPE_BINFO (ref
) = binfo
;
10288 BINFO_OFFSET (binfo
) = size_zero_node
;
10289 BINFO_TYPE (binfo
) = ref
;
10293 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
10294 /* An aggregate cannot have baseclasses. */
10295 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
10297 if (TREE_CODE (ref
) == UNION_TYPE
)
10299 error ("derived union %qT invalid", ref
);
10306 if (TYPE_FOR_JAVA (ref
))
10308 error ("Java class %qT cannot have multiple bases", ref
);
10315 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
10317 if (TYPE_FOR_JAVA (ref
))
10319 error ("Java class %qT cannot have virtual bases", ref
);
10324 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
10326 tree access
= TREE_PURPOSE (base_list
);
10327 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
10328 tree basetype
= TREE_VALUE (base_list
);
10330 if (access
== access_default_node
)
10331 access
= default_access
;
10333 if (PACK_EXPANSION_P (basetype
))
10334 basetype
= PACK_EXPANSION_PATTERN (basetype
);
10335 if (TREE_CODE (basetype
) == TYPE_DECL
)
10336 basetype
= TREE_TYPE (basetype
);
10337 if (TREE_CODE (basetype
) != RECORD_TYPE
10338 && TREE_CODE (basetype
) != TYPENAME_TYPE
10339 && TREE_CODE (basetype
) != TEMPLATE_TYPE_PARM
10340 && TREE_CODE (basetype
) != BOUND_TEMPLATE_TEMPLATE_PARM
)
10342 error ("base type %qT fails to be a struct or class type",
10347 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
10348 TYPE_FOR_JAVA (ref
) = 1;
10350 base_binfo
= NULL_TREE
;
10351 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
10353 base_binfo
= TYPE_BINFO (basetype
);
10354 /* The original basetype could have been a typedef'd type. */
10355 basetype
= BINFO_TYPE (base_binfo
);
10357 /* Inherit flags from the base. */
10358 TYPE_HAS_NEW_OPERATOR (ref
)
10359 |= TYPE_HAS_NEW_OPERATOR (basetype
);
10360 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
10361 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
10362 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
10363 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
10364 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
10365 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
10366 CLASSTYPE_REPEATED_BASE_P (ref
)
10367 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
10370 /* We must do this test after we've seen through a typedef
10372 if (TYPE_MARKED_P (basetype
))
10374 if (basetype
== ref
)
10375 error ("recursive type %qT undefined", basetype
);
10377 error ("duplicate base type %qT invalid", basetype
);
10381 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
10382 /* Regenerate the pack expansion for the bases. */
10383 basetype
= make_pack_expansion (basetype
);
10385 TYPE_MARKED_P (basetype
) = 1;
10387 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
10388 &igo_prev
, via_virtual
);
10389 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
10390 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
10392 BINFO_BASE_APPEND (binfo
, base_binfo
);
10393 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
10396 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
10397 /* If we have space in the vbase vector, we must have shared at
10398 least one of them, and are therefore diamond shaped. */
10399 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
10401 /* Unmark all the types. */
10402 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
10403 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
10404 TYPE_MARKED_P (ref
) = 0;
10406 /* Now see if we have a repeated base type. */
10407 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
10409 for (base_binfo
= binfo
; base_binfo
;
10410 base_binfo
= TREE_CHAIN (base_binfo
))
10412 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
10414 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
10417 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
10419 for (base_binfo
= binfo
; base_binfo
;
10420 base_binfo
= TREE_CHAIN (base_binfo
))
10421 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
10422 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
10431 /* Begin compiling the definition of an enumeration type.
10433 Returns the type object, as yet incomplete.
10434 Also records info about it so that build_enumerator
10435 may be used to declare the individual values as they are read. */
10438 start_enum (tree name
)
10442 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
10444 /* If this is the real definition for a previous forward reference,
10445 fill in the contents in the same object that used to be the
10446 forward reference. */
10448 enumtype
= lookup_and_check_tag (enum_type
, name
,
10449 /*tag_scope=*/ts_current
,
10450 /*template_header_p=*/false);
10452 if (enumtype
!= NULL_TREE
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
10454 error ("multiple definition of %q#T", enumtype
);
10455 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype
));
10456 /* Clear out TYPE_VALUES, and start again. */
10457 TYPE_VALUES (enumtype
) = NULL_TREE
;
10461 /* In case of error, make a dummy enum to allow parsing to
10463 if (enumtype
== error_mark_node
)
10464 name
= make_anon_name ();
10466 enumtype
= make_node (ENUMERAL_TYPE
);
10467 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
10473 /* After processing and defining all the values of an enumeration type,
10474 install their decls in the enumeration type and finish it off.
10475 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10478 finish_enum (tree enumtype
)
10487 bool use_short_enum
;
10491 integer_type_kind itk
;
10492 tree underlying_type
= NULL_TREE
;
10494 /* We built up the VALUES in reverse order. */
10495 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
10497 /* For an enum defined in a template, just set the type of the values;
10498 all further processing is postponed until the template is
10499 instantiated. We need to set the type so that tsubst of a CONST_DECL
10501 if (processing_template_decl
)
10503 for (values
= TYPE_VALUES (enumtype
);
10505 values
= TREE_CHAIN (values
))
10506 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
10507 if (at_function_scope_p ())
10508 add_stmt (build_min (TAG_DEFN
, enumtype
));
10512 /* Determine the minimum and maximum values of the enumerators. */
10513 if (TYPE_VALUES (enumtype
))
10515 minnode
= maxnode
= NULL_TREE
;
10517 for (values
= TYPE_VALUES (enumtype
);
10519 values
= TREE_CHAIN (values
))
10521 decl
= TREE_VALUE (values
);
10523 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10524 each enumerator has the type of its enumeration. Prior to the
10525 closing brace, the type of each enumerator is the type of its
10526 initializing value. */
10527 TREE_TYPE (decl
) = enumtype
;
10529 /* Update the minimum and maximum values, if appropriate. */
10530 value
= DECL_INITIAL (decl
);
10531 if (value
== error_mark_node
)
10532 value
= integer_zero_node
;
10533 /* Figure out what the minimum and maximum values of the
10534 enumerators are. */
10536 minnode
= maxnode
= value
;
10537 else if (tree_int_cst_lt (maxnode
, value
))
10539 else if (tree_int_cst_lt (value
, minnode
))
10546 If the enumerator-list is empty, the underlying type is as if
10547 the enumeration had a single enumerator with value 0. */
10548 minnode
= maxnode
= integer_zero_node
;
10550 /* Compute the number of bits require to represent all values of the
10551 enumeration. We must do this before the type of MINNODE and
10552 MAXNODE are transformed, since min_precision relies on the
10553 TREE_TYPE of the value it is passed. */
10554 unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
10555 lowprec
= min_precision (minnode
, unsignedp
);
10556 highprec
= min_precision (maxnode
, unsignedp
);
10557 precision
= MAX (lowprec
, highprec
);
10559 /* Determine the underlying type of the enumeration.
10563 The underlying type of an enumeration is an integral type that
10564 can represent all the enumerator values defined in the
10565 enumeration. It is implementation-defined which integral type is
10566 used as the underlying type for an enumeration except that the
10567 underlying type shall not be larger than int unless the value of
10568 an enumerator cannot fit in an int or unsigned int.
10570 We use "int" or an "unsigned int" as the underlying type, even if
10571 a smaller integral type would work, unless the user has
10572 explicitly requested that we use the smallest possible type. The
10573 user can request that for all enumerations with a command line
10574 flag, or for just one enumeration with an attribute. */
10576 use_short_enum
= flag_short_enums
10577 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
10579 for (itk
= (use_short_enum
? itk_char
: itk_int
);
10583 underlying_type
= integer_types
[itk
];
10584 if (TYPE_PRECISION (underlying_type
) >= precision
10585 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
10588 if (itk
== itk_none
)
10592 IF no integral type can represent all the enumerator values, the
10593 enumeration is ill-formed. */
10594 error ("no integral type can represent all of the enumerator values "
10595 "for %qT", enumtype
);
10596 precision
= TYPE_PRECISION (long_long_integer_type_node
);
10597 underlying_type
= integer_types
[itk_unsigned_long_long
];
10600 /* Compute the minium and maximum values for the type.
10604 For an enumeration where emin is the smallest enumerator and emax
10605 is the largest, the values of the enumeration are the values of the
10606 underlying type in the range bmin to bmax, where bmin and bmax are,
10607 respectively, the smallest and largest values of the smallest bit-
10608 field that can store emin and emax. */
10610 /* The middle-end currently assumes that types with TYPE_PRECISION
10611 narrower than their underlying type are suitably zero or sign
10612 extended to fill their mode. g++ doesn't make these guarantees.
10613 Until the middle-end can represent such paradoxical types, we
10614 set the TYPE_PRECISION to the width of the underlying type. */
10615 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (underlying_type
);
10617 set_min_and_max_values_for_integral_type (enumtype
, precision
, unsignedp
);
10621 The value of sizeof() applied to an enumeration type, an object
10622 of an enumeration type, or an enumerator, is the value of sizeof()
10623 applied to the underlying type. */
10624 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
10625 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
10626 TYPE_MODE (enumtype
) = TYPE_MODE (underlying_type
);
10627 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
10628 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
10629 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
10631 /* Convert each of the enumerators to the type of the underlying
10632 type of the enumeration. */
10633 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
10635 location_t saved_location
;
10637 decl
= TREE_VALUE (values
);
10638 saved_location
= input_location
;
10639 input_location
= DECL_SOURCE_LOCATION (decl
);
10640 value
= perform_implicit_conversion (underlying_type
,
10641 DECL_INITIAL (decl
));
10642 input_location
= saved_location
;
10644 /* Do not clobber shared ints. */
10645 value
= copy_node (value
);
10647 TREE_TYPE (value
) = enumtype
;
10648 DECL_INITIAL (decl
) = value
;
10649 TREE_VALUE (values
) = value
;
10652 /* Fix up all variant types of this enum type. */
10653 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
10655 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
10656 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (enumtype
);
10657 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (enumtype
);
10658 TYPE_SIZE (t
) = TYPE_SIZE (enumtype
);
10659 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (enumtype
);
10660 TYPE_MODE (t
) = TYPE_MODE (enumtype
);
10661 TYPE_PRECISION (t
) = TYPE_PRECISION (enumtype
);
10662 TYPE_ALIGN (t
) = TYPE_ALIGN (enumtype
);
10663 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (enumtype
);
10664 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (enumtype
);
10667 /* Finish debugging output for this type. */
10668 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
10671 /* Build and install a CONST_DECL for an enumeration constant of the
10672 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10673 Assignment of sequential values by default is handled here. */
10676 build_enumerator (tree name
, tree value
, tree enumtype
)
10682 /* If the VALUE was erroneous, pretend it wasn't there; that will
10683 result in the enum being assigned the next value in sequence. */
10684 if (value
== error_mark_node
)
10687 /* Remove no-op casts from the value. */
10689 STRIP_TYPE_NOPS (value
);
10691 if (! processing_template_decl
)
10693 /* Validate and default VALUE. */
10694 if (value
!= NULL_TREE
)
10696 value
= integral_constant_value (value
);
10698 if (TREE_CODE (value
) == INTEGER_CST
)
10700 value
= perform_integral_promotions (value
);
10701 constant_expression_warning (value
);
10705 error ("enumerator value for %qD is not an integer constant", name
);
10710 /* Default based on previous value. */
10711 if (value
== NULL_TREE
)
10713 if (TYPE_VALUES (enumtype
))
10716 unsigned HOST_WIDE_INT lo
;
10720 /* The next value is the previous value plus one. We can
10721 safely assume that the previous value is an INTEGER_CST.
10722 add_double doesn't know the type of the target expression,
10723 so we must check with int_fits_type_p as well. */
10724 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
10725 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
10726 TREE_INT_CST_HIGH (prev_value
),
10728 value
= build_int_cst_wide (TREE_TYPE (prev_value
), lo
, hi
);
10729 overflowed
|= !int_fits_type_p (value
, TREE_TYPE (prev_value
));
10733 error ("overflow in enumeration values at %qD", name
);
10734 value
= error_mark_node
;
10738 value
= integer_zero_node
;
10741 /* Remove no-op casts from the value. */
10742 STRIP_TYPE_NOPS (value
);
10745 /* C++ associates enums with global, function, or class declarations. */
10746 context
= current_scope ();
10748 /* Build the actual enumeration constant. Note that the enumeration
10749 constants have the type of their initializers until the
10750 enumeration is complete:
10754 Following the closing brace of an enum-specifier, each enumer-
10755 ator has the type of its enumeration. Prior to the closing
10756 brace, the type of each enumerator is the type of its
10757 initializing value.
10759 In finish_enum we will reset the type. Of course, if we're
10760 processing a template, there may be no value. */
10761 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
10763 if (context
&& context
== current_class_type
)
10764 /* This enum declaration is local to the class. We need the full
10765 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10766 decl
= build_lang_decl (CONST_DECL
, name
, type
);
10768 /* It's a global enum, or it's local to a function. (Note local to
10769 a function could mean local to a class method. */
10770 decl
= build_decl (CONST_DECL
, name
, type
);
10772 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
10773 TREE_CONSTANT (decl
) = 1;
10774 TREE_INVARIANT (decl
) = 1;
10775 TREE_READONLY (decl
) = 1;
10776 DECL_INITIAL (decl
) = value
;
10778 if (context
&& context
== current_class_type
)
10779 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10780 on the TYPE_FIELDS list for `S'. (That's so that you can say
10781 things like `S::i' later.) */
10782 finish_member_declaration (decl
);
10786 /* Add this enumeration constant to the list for this type. */
10787 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
10791 /* We're defining DECL. Make sure that it's type is OK. */
10794 check_function_type (tree decl
, tree current_function_parms
)
10796 tree fntype
= TREE_TYPE (decl
);
10797 tree return_type
= complete_type (TREE_TYPE (fntype
));
10799 /* In a function definition, arg types must be complete. */
10800 require_complete_types_for_parms (current_function_parms
);
10802 if (dependent_type_p (return_type
))
10804 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
10806 tree args
= TYPE_ARG_TYPES (fntype
);
10808 error ("return type %q#T is incomplete", return_type
);
10810 /* Make it return void instead. */
10811 if (TREE_CODE (fntype
) == METHOD_TYPE
)
10812 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
10814 TREE_CHAIN (args
));
10816 fntype
= build_function_type (void_type_node
, args
);
10818 = build_exception_variant (fntype
,
10819 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
10822 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
10825 /* Create the FUNCTION_DECL for a function definition.
10826 DECLSPECS and DECLARATOR are the parts of the declaration;
10827 they describe the function's name and the type it returns,
10828 but twisted together in a fashion that parallels the syntax of C.
10830 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10831 DECLARATOR is really the DECL for the function we are about to
10832 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10833 indicating that the function is an inline defined in-class.
10835 This function creates a binding context for the function body
10836 as well as setting up the FUNCTION_DECL in current_function_decl.
10838 For C++, we must first check whether that datum makes any sense.
10839 For example, "class A local_a(1,2);" means that variable local_a
10840 is an aggregate of type A, which should have a constructor
10841 applied to it with the argument list [1, 2].
10843 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
10844 or may be a BLOCK if the function has been defined previously
10845 in this translation unit. On exit, DECL_INITIAL (decl1) will be
10846 error_mark_node if the function has never been defined, or
10847 a BLOCK if the function has been defined somewhere. */
10850 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
10852 tree ctype
= NULL_TREE
;
10855 int doing_friend
= 0;
10856 struct cp_binding_level
*bl
;
10857 tree current_function_parms
;
10858 struct c_fileinfo
*finfo
10859 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
10860 bool honor_interface
;
10862 /* Sanity check. */
10863 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
10864 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
10866 fntype
= TREE_TYPE (decl1
);
10867 if (TREE_CODE (fntype
) == METHOD_TYPE
)
10868 ctype
= TYPE_METHOD_BASETYPE (fntype
);
10870 /* ISO C++ 11.4/5. A friend function defined in a class is in
10871 the (lexical) scope of the class in which it is defined. */
10872 if (!ctype
&& DECL_FRIEND_P (decl1
))
10874 ctype
= DECL_FRIEND_CONTEXT (decl1
);
10876 /* CTYPE could be null here if we're dealing with a template;
10877 for example, `inline friend float foo()' inside a template
10878 will have no CTYPE set. */
10879 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
10885 if (DECL_DECLARED_INLINE_P (decl1
)
10886 && lookup_attribute ("noinline", attrs
))
10887 warning (0, "inline function %q+D given attribute noinline", decl1
);
10889 /* Handle gnu_inline attribute. */
10890 if (GNU_INLINE_P (decl1
))
10892 DECL_EXTERNAL (decl1
) = 1;
10893 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
10894 DECL_INTERFACE_KNOWN (decl1
) = 1;
10897 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
10898 /* This is a constructor, we must ensure that any default args
10899 introduced by this definition are propagated to the clones
10900 now. The clones are used directly in overload resolution. */
10901 adjust_clone_args (decl1
);
10903 /* Sometimes we don't notice that a function is a static member, and
10904 build a METHOD_TYPE for it. Fix that up now. */
10905 if (ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
10906 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
)
10908 revert_static_member_fn (decl1
);
10912 /* Set up current_class_type, and enter the scope of the class, if
10915 push_nested_class (ctype
);
10916 else if (DECL_STATIC_FUNCTION_P (decl1
))
10917 push_nested_class (DECL_CONTEXT (decl1
));
10919 /* Now that we have entered the scope of the class, we must restore
10920 the bindings for any template parameters surrounding DECL1, if it
10921 is an inline member template. (Order is important; consider the
10922 case where a template parameter has the same name as a field of
10923 the class.) It is not until after this point that
10924 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10925 if (flags
& SF_INCLASS_INLINE
)
10926 maybe_begin_member_template_processing (decl1
);
10928 /* Effective C++ rule 15. */
10930 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
10931 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
10932 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
10934 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10935 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10936 if (!DECL_INITIAL (decl1
))
10937 DECL_INITIAL (decl1
) = error_mark_node
;
10939 /* This function exists in static storage.
10940 (This does not mean `static' in the C sense!) */
10941 TREE_STATIC (decl1
) = 1;
10943 /* We must call push_template_decl after current_class_type is set
10944 up. (If we are processing inline definitions after exiting a
10945 class scope, current_class_type will be NULL_TREE until set above
10946 by push_nested_class.) */
10947 if (processing_template_decl
)
10949 /* FIXME: Handle error_mark_node more gracefully. */
10950 tree newdecl1
= push_template_decl (decl1
);
10951 if (newdecl1
!= error_mark_node
)
10955 /* We are now in the scope of the function being defined. */
10956 current_function_decl
= decl1
;
10958 /* Save the parm names or decls from this function's declarator
10959 where store_parm_decls will find them. */
10960 current_function_parms
= DECL_ARGUMENTS (decl1
);
10962 /* Make sure the parameter and return types are reasonable. When
10963 you declare a function, these types can be incomplete, but they
10964 must be complete when you define the function. */
10965 check_function_type (decl1
, current_function_parms
);
10967 /* Build the return declaration for the function. */
10968 restype
= TREE_TYPE (fntype
);
10969 if (DECL_RESULT (decl1
) == NULL_TREE
)
10973 resdecl
= build_decl (RESULT_DECL
, 0, TYPE_MAIN_VARIANT (restype
));
10974 DECL_ARTIFICIAL (resdecl
) = 1;
10975 DECL_IGNORED_P (resdecl
) = 1;
10976 DECL_RESULT (decl1
) = resdecl
;
10978 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
10981 /* Let the user know we're compiling this function. */
10982 announce_function (decl1
);
10984 /* Record the decl so that the function name is defined.
10985 If we already have a decl for this name, and it is a FUNCTION_DECL,
10986 use the old decl. */
10987 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
10989 /* A specialization is not used to guide overload resolution. */
10990 if (!DECL_FUNCTION_MEMBER_P (decl1
)
10991 && !(DECL_USE_TEMPLATE (decl1
) &&
10992 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
10994 tree olddecl
= pushdecl (decl1
);
10996 if (olddecl
== error_mark_node
)
10997 /* If something went wrong when registering the declaration,
10998 use DECL1; we have to have a FUNCTION_DECL to use when
10999 parsing the body of the function. */
11003 /* Otherwise, OLDDECL is either a previous declaration
11004 of the same function or DECL1 itself. */
11006 if (warn_missing_declarations
11007 && olddecl
== decl1
11008 && !DECL_MAIN_P (decl1
)
11009 && TREE_PUBLIC (decl1
)
11010 && !DECL_DECLARED_INLINE_P (decl1
))
11014 /* Check whether DECL1 is in an anonymous
11016 for (context
= DECL_CONTEXT (decl1
);
11018 context
= DECL_CONTEXT (context
))
11020 if (TREE_CODE (context
) == NAMESPACE_DECL
11021 && DECL_NAME (context
) == NULL_TREE
)
11025 if (context
== NULL
)
11026 warning (OPT_Wmissing_declarations
,
11027 "no previous declaration for %q+D", decl1
);
11035 /* We need to set the DECL_CONTEXT. */
11036 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
11037 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
11039 fntype
= TREE_TYPE (decl1
);
11041 /* If #pragma weak applies, mark the decl appropriately now.
11042 The pragma only applies to global functions. Because
11043 determining whether or not the #pragma applies involves
11044 computing the mangled name for the declaration, we cannot
11045 apply the pragma until after we have merged this declaration
11046 with any previous declarations; if the original declaration
11047 has a linkage specification, that specification applies to
11048 the definition as well, and may affect the mangled name. */
11049 if (!DECL_CONTEXT (decl1
))
11050 maybe_apply_pragma_weak (decl1
);
11053 /* Reset this in case the call to pushdecl changed it. */
11054 current_function_decl
= decl1
;
11056 gcc_assert (DECL_INITIAL (decl1
));
11058 /* This function may already have been parsed, in which case just
11059 return; our caller will skip over the body without parsing. */
11060 if (DECL_INITIAL (decl1
) != error_mark_node
)
11063 /* Initialize RTL machinery. We cannot do this until
11064 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11065 even when processing a template; this is how we get
11066 CFUN set up, and our per-function variables initialized.
11067 FIXME factor out the non-RTL stuff. */
11068 bl
= current_binding_level
;
11069 allocate_struct_function (decl1
);
11070 current_binding_level
= bl
;
11072 /* Even though we're inside a function body, we still don't want to
11073 call expand_expr to calculate the size of a variable-sized array.
11074 We haven't necessarily assigned RTL to all variables yet, so it's
11075 not safe to try to expand expressions involving them. */
11076 cfun
->x_dont_save_pending_sizes_p
= 1;
11078 /* Start the statement-tree, start the tree now. */
11079 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
11081 /* If we are (erroneously) defining a function that we have already
11082 defined before, wipe out what we knew before. */
11083 if (!DECL_PENDING_INLINE_P (decl1
))
11084 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
11086 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
11088 /* We know that this was set up by `grokclassfn'. We do not
11089 wait until `store_parm_decls', since evil parse errors may
11090 never get us to that point. Here we keep the consistency
11091 between `current_class_type' and `current_class_ptr'. */
11092 tree t
= DECL_ARGUMENTS (decl1
);
11094 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
11095 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
11097 cp_function_chain
->x_current_class_ref
11098 = build_indirect_ref (t
, NULL
);
11099 cp_function_chain
->x_current_class_ptr
= t
;
11101 /* Constructors and destructors need to know whether they're "in
11102 charge" of initializing virtual base classes. */
11103 t
= TREE_CHAIN (t
);
11104 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
11106 current_in_charge_parm
= t
;
11107 t
= TREE_CHAIN (t
);
11109 if (DECL_HAS_VTT_PARM_P (decl1
))
11111 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
11112 current_vtt_parm
= t
;
11116 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
11117 /* Implicitly-defined methods (like the
11118 destructor for a class in which no destructor
11119 is explicitly declared) must not be defined
11120 until their definition is needed. So, we
11121 ignore interface specifications for
11122 compiler-generated functions. */
11123 && !DECL_ARTIFICIAL (decl1
));
11125 if (DECL_INTERFACE_KNOWN (decl1
))
11127 tree ctx
= decl_function_context (decl1
);
11129 if (DECL_NOT_REALLY_EXTERN (decl1
))
11130 DECL_EXTERNAL (decl1
) = 0;
11132 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
11133 && TREE_PUBLIC (ctx
))
11134 /* This is a function in a local class in an extern inline
11136 comdat_linkage (decl1
);
11138 /* If this function belongs to an interface, it is public.
11139 If it belongs to someone else's interface, it is also external.
11140 This only affects inlines and template instantiations. */
11141 else if (!finfo
->interface_unknown
&& honor_interface
)
11143 if (DECL_DECLARED_INLINE_P (decl1
)
11144 || DECL_TEMPLATE_INSTANTIATION (decl1
)
11145 || processing_template_decl
)
11147 DECL_EXTERNAL (decl1
)
11148 = (finfo
->interface_only
11149 || (DECL_DECLARED_INLINE_P (decl1
)
11150 && ! flag_implement_inlines
11151 && !DECL_VINDEX (decl1
)));
11153 /* For WIN32 we also want to put these in linkonce sections. */
11154 maybe_make_one_only (decl1
);
11157 DECL_EXTERNAL (decl1
) = 0;
11158 DECL_INTERFACE_KNOWN (decl1
) = 1;
11159 /* If this function is in an interface implemented in this file,
11160 make sure that the back end knows to emit this function
11162 if (!DECL_EXTERNAL (decl1
))
11163 mark_needed (decl1
);
11165 else if (finfo
->interface_unknown
&& finfo
->interface_only
11166 && honor_interface
)
11168 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11169 interface, we will have both finfo->interface_unknown and
11170 finfo->interface_only set. In that case, we don't want to
11171 use the normal heuristics because someone will supply a
11172 #pragma implementation elsewhere, and deducing it here would
11173 produce a conflict. */
11174 comdat_linkage (decl1
);
11175 DECL_EXTERNAL (decl1
) = 0;
11176 DECL_INTERFACE_KNOWN (decl1
) = 1;
11177 DECL_DEFER_OUTPUT (decl1
) = 1;
11181 /* This is a definition, not a reference.
11182 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11183 if (!GNU_INLINE_P (decl1
))
11184 DECL_EXTERNAL (decl1
) = 0;
11186 if ((DECL_DECLARED_INLINE_P (decl1
)
11187 || DECL_TEMPLATE_INSTANTIATION (decl1
))
11188 && ! DECL_INTERFACE_KNOWN (decl1
)
11189 /* Don't try to defer nested functions for now. */
11190 && ! decl_function_context (decl1
))
11191 DECL_DEFER_OUTPUT (decl1
) = 1;
11193 DECL_INTERFACE_KNOWN (decl1
) = 1;
11196 /* Determine the ELF visibility attribute for the function. We must not
11197 do this before calling "pushdecl", as we must allow "duplicate_decls"
11198 to merge any attributes appropriately. We also need to wait until
11200 if (!DECL_CLONED_FUNCTION_P (decl1
))
11201 determine_visibility (decl1
);
11203 begin_scope (sk_function_parms
, decl1
);
11207 if (DECL_DESTRUCTOR_P (decl1
)
11208 || (DECL_CONSTRUCTOR_P (decl1
)
11209 && targetm
.cxx
.cdtor_returns_this ()))
11211 cdtor_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
11212 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
11215 start_fname_decls ();
11217 store_parm_decls (current_function_parms
);
11221 /* Like start_preparsed_function, except that instead of a
11222 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11224 Returns 1 on success. If the DECLARATOR is not suitable for a function
11225 (it defines a datum instead), we return 0, which tells
11226 yyparse to report a parse error. */
11229 start_function (cp_decl_specifier_seq
*declspecs
,
11230 const cp_declarator
*declarator
,
11235 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
11236 /* If the declarator is not suitable for a function definition,
11237 cause a syntax error. */
11238 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
11241 if (DECL_MAIN_P (decl1
))
11242 /* main must return int. grokfndecl should have corrected it
11243 (and issued a diagnostic) if the user got it wrong. */
11244 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
11245 integer_type_node
));
11247 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
11252 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11256 use_eh_spec_block (tree fn
)
11258 return (flag_exceptions
&& flag_enforce_eh_specs
11259 && !processing_template_decl
11260 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn
))
11261 /* We insert the EH_SPEC_BLOCK only in the original
11262 function; then, it is copied automatically to the
11264 && !DECL_CLONED_FUNCTION_P (fn
)
11265 /* Implicitly-generated constructors and destructors have
11266 exception specifications. However, those specifications
11267 are the union of the possible exceptions specified by the
11268 constructors/destructors for bases and members, so no
11269 unallowed exception will ever reach this function. By
11270 not creating the EH_SPEC_BLOCK we save a little memory,
11271 and we avoid spurious warnings about unreachable
11273 && !DECL_ARTIFICIAL (fn
));
11276 /* Store the parameter declarations into the current function declaration.
11277 This is called after parsing the parameter declarations, before
11278 digesting the body of the function.
11280 Also install to binding contour return value identifier, if any. */
11283 store_parm_decls (tree current_function_parms
)
11285 tree fndecl
= current_function_decl
;
11288 /* This is a chain of any other decls that came in among the parm
11289 declarations. If a parm is declared with enum {foo, bar} x;
11290 then CONST_DECLs for foo and bar are put here. */
11291 tree nonparms
= NULL_TREE
;
11293 if (current_function_parms
)
11295 /* This case is when the function was defined with an ANSI prototype.
11296 The parms already have decls, so we need not do anything here
11297 except record them as in effect
11298 and complain if any redundant old-style parm decls were written. */
11300 tree specparms
= current_function_parms
;
11303 /* Must clear this because it might contain TYPE_DECLs declared
11305 current_binding_level
->names
= NULL
;
11307 /* If we're doing semantic analysis, then we'll call pushdecl
11308 for each of these. We must do them in reverse order so that
11309 they end in the correct forward order. */
11310 specparms
= nreverse (specparms
);
11312 for (parm
= specparms
; parm
; parm
= next
)
11314 next
= TREE_CHAIN (parm
);
11315 if (TREE_CODE (parm
) == PARM_DECL
)
11317 if (DECL_NAME (parm
) == NULL_TREE
11318 || TREE_CODE (parm
) != VOID_TYPE
)
11321 error ("parameter %qD declared void", parm
);
11325 /* If we find an enum constant or a type tag,
11326 put it aside for the moment. */
11327 TREE_CHAIN (parm
) = NULL_TREE
;
11328 nonparms
= chainon (nonparms
, parm
);
11332 /* Get the decls in their original chain order and record in the
11333 function. This is all and only the PARM_DECLs that were
11334 pushed into scope by the loop above. */
11335 DECL_ARGUMENTS (fndecl
) = getdecls ();
11338 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
11340 /* Now store the final chain of decls for the arguments
11341 as the decl-chain of the current lexical scope.
11342 Put the enumerators in as well, at the front so that
11343 DECL_ARGUMENTS is not modified. */
11344 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
11346 if (use_eh_spec_block (current_function_decl
))
11347 current_eh_spec_block
= begin_eh_spec_block ();
11351 /* We have finished doing semantic analysis on DECL, but have not yet
11352 generated RTL for its body. Save away our current state, so that
11353 when we want to generate RTL later we know what to do. */
11356 save_function_data (tree decl
)
11358 struct language_function
*f
;
11360 /* Save the language-specific per-function data so that we can
11361 get it back when we really expand this function. */
11362 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
11365 f
= GGC_NEW (struct language_function
);
11366 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
11367 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
11369 /* Clear out the bits we don't need. */
11370 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL_TREE
;
11371 f
->bindings
= NULL
;
11372 f
->x_local_names
= NULL
;
11376 /* Set the return value of the constructor (if present). */
11379 finish_constructor_body (void)
11384 if (targetm
.cxx
.cdtor_returns_this ())
11386 /* Any return from a constructor will end up here. */
11387 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
11389 val
= DECL_ARGUMENTS (current_function_decl
);
11390 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
11391 DECL_RESULT (current_function_decl
), val
);
11392 /* Return the address of the object. */
11393 exprstmt
= build_stmt (RETURN_EXPR
, val
);
11394 add_stmt (exprstmt
);
11398 /* Do all the processing for the beginning of a destructor; set up the
11399 vtable pointers and cleanups for bases and members. */
11402 begin_destructor_body (void)
11404 tree compound_stmt
;
11406 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11407 issued an error message. We still want to try to process the
11408 body of the function, but initialize_vtbl_ptrs will crash if
11409 TYPE_BINFO is NULL. */
11410 if (COMPLETE_TYPE_P (current_class_type
))
11412 compound_stmt
= begin_compound_stmt (0);
11413 /* Make all virtual function table pointers in non-virtual base
11414 classes point to CURRENT_CLASS_TYPE's virtual function
11416 initialize_vtbl_ptrs (current_class_ptr
);
11417 finish_compound_stmt (compound_stmt
);
11419 /* And insert cleanups for our bases and members so that they
11420 will be properly destroyed if we throw. */
11421 push_base_cleanups ();
11425 /* At the end of every destructor we generate code to delete the object if
11426 necessary. Do that now. */
11429 finish_destructor_body (void)
11433 /* Any return from a destructor will end up here; that way all base
11434 and member cleanups will be run when the function returns. */
11435 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
11437 /* In a virtual destructor, we must call delete. */
11438 if (DECL_VIRTUAL_P (current_function_decl
))
11441 tree virtual_size
= cxx_sizeof (current_class_type
);
11445 At the point of definition of a virtual destructor (including
11446 an implicit definition), non-placement operator delete shall
11447 be looked up in the scope of the destructor's class and if
11448 found shall be accessible and unambiguous. */
11449 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
11451 /*global_p=*/false,
11452 /*placement=*/NULL_TREE
,
11453 /*alloc_fn=*/NULL_TREE
);
11455 if_stmt
= begin_if_stmt ();
11456 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
11457 current_in_charge_parm
,
11460 finish_expr_stmt (exprstmt
);
11461 finish_then_clause (if_stmt
);
11462 finish_if_stmt (if_stmt
);
11465 if (targetm
.cxx
.cdtor_returns_this ())
11469 val
= DECL_ARGUMENTS (current_function_decl
);
11470 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
11471 DECL_RESULT (current_function_decl
), val
);
11472 /* Return the address of the object. */
11473 exprstmt
= build_stmt (RETURN_EXPR
, val
);
11474 add_stmt (exprstmt
);
11478 /* Do the necessary processing for the beginning of a function body, which
11479 in this case includes member-initializers, but not the catch clauses of
11480 a function-try-block. Currently, this means opening a binding level
11481 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11484 begin_function_body (void)
11488 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
11491 if (processing_template_decl
)
11492 /* Do nothing now. */;
11494 /* Always keep the BLOCK node associated with the outermost pair of
11495 curly braces of a function. These are needed for correct
11496 operation of dwarfout.c. */
11497 keep_next_level (true);
11499 stmt
= begin_compound_stmt (BCS_FN_BODY
);
11501 if (processing_template_decl
)
11502 /* Do nothing now. */;
11503 else if (DECL_DESTRUCTOR_P (current_function_decl
))
11504 begin_destructor_body ();
11509 /* Do the processing for the end of a function body. Currently, this means
11510 closing out the cleanups for fully-constructed bases and members, and in
11511 the case of the destructor, deleting the object if desired. Again, this
11512 is only meaningful for [cd]tors, since they are the only functions where
11513 there is a significant distinction between the main body and any
11514 function catch clauses. Handling, say, main() return semantics here
11515 would be wrong, as flowing off the end of a function catch clause for
11516 main() would also need to return 0. */
11519 finish_function_body (tree compstmt
)
11521 if (compstmt
== NULL_TREE
)
11524 /* Close the block. */
11525 finish_compound_stmt (compstmt
);
11527 if (processing_template_decl
)
11528 /* Do nothing now. */;
11529 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
11530 finish_constructor_body ();
11531 else if (DECL_DESTRUCTOR_P (current_function_decl
))
11532 finish_destructor_body ();
11535 /* Given a function, returns the BLOCK corresponding to the outermost level
11536 of curly braces, skipping the artificial block created for constructor
11540 outer_curly_brace_block (tree fndecl
)
11542 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
11543 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
11544 /* Skip the artificial function body block. */
11545 block
= BLOCK_SUBBLOCKS (block
);
11549 /* Finish up a function declaration and compile that function
11550 all the way to assembler language output. The free the storage
11551 for the function definition.
11553 FLAGS is a bitwise or of the following values:
11555 We just finished processing the body of an in-class inline
11556 function definition. (This processing will have taken place
11557 after the class definition is complete.) */
11560 finish_function (int flags
)
11562 tree fndecl
= current_function_decl
;
11563 tree fntype
, ctype
= NULL_TREE
;
11564 int inclass_inline
= (flags
& 2) != 0;
11567 /* When we get some parse errors, we can end up without a
11568 current_function_decl, so cope. */
11569 if (fndecl
== NULL_TREE
)
11570 return error_mark_node
;
11572 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
11573 && DECL_VIRTUAL_P (fndecl
)
11574 && !processing_template_decl
)
11576 tree fnclass
= DECL_CONTEXT (fndecl
);
11577 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
11578 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
11581 nested
= function_depth
> 1;
11582 fntype
= TREE_TYPE (fndecl
);
11584 /* TREE_READONLY (fndecl) = 1;
11585 This caused &foo to be of type ptr-to-const-function
11586 which then got a warning when stored in a ptr-to-function variable. */
11588 gcc_assert (building_stmt_tree ());
11589 /* The current function is being defined, so its DECL_INITIAL should
11590 be set, and unless there's a multiple definition, it should be
11591 error_mark_node. */
11592 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
11594 /* For a cloned function, we've already got all the code we need;
11595 there's no need to add any extra bits. */
11596 if (!DECL_CLONED_FUNCTION_P (fndecl
))
11598 if (DECL_MAIN_P (current_function_decl
))
11602 /* Make it so that `main' always returns 0 by default (or
11605 stmt
= finish_return_stmt (integer_one_node
);
11607 stmt
= finish_return_stmt (integer_zero_node
);
11609 /* Hack. We don't want the middle-end to warn that this
11610 return is unreachable, so put the statement on the
11612 #ifdef USE_MAPPED_LOCATION
11613 SET_EXPR_LOCATION (stmt
, UNKNOWN_LOCATION
);
11615 annotate_with_file_line (stmt
, input_filename
, 0);
11619 if (use_eh_spec_block (current_function_decl
))
11620 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11621 (TREE_TYPE (current_function_decl
)),
11622 current_eh_spec_block
);
11625 /* If we're saving up tree structure, tie off the function now. */
11626 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
11628 finish_fname_decls ();
11630 /* If this function can't throw any exceptions, remember that. */
11631 if (!processing_template_decl
11632 && !cp_function_chain
->can_throw
11633 && !flag_non_call_exceptions
11634 && !DECL_REPLACEABLE_P (fndecl
))
11635 TREE_NOTHROW (fndecl
) = 1;
11637 /* This must come after expand_function_end because cleanups might
11638 have declarations (from inline functions) that need to go into
11639 this function's blocks. */
11641 /* If the current binding level isn't the outermost binding level
11642 for this function, either there is a bug, or we have experienced
11643 syntax errors and the statement tree is malformed. */
11644 if (current_binding_level
->kind
!= sk_function_parms
)
11646 /* Make sure we have already experienced errors. */
11647 gcc_assert (errorcount
);
11649 /* Throw away the broken statement tree and extra binding
11651 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
11653 while (current_binding_level
->kind
!= sk_function_parms
)
11655 if (current_binding_level
->kind
== sk_class
)
11656 pop_nested_class ();
11658 poplevel (0, 0, 0);
11661 poplevel (1, 0, 1);
11663 /* Statements should always be full-expressions at the outermost set
11664 of curly braces for a function. */
11665 gcc_assert (stmts_are_full_exprs_p ());
11667 /* Set up the named return value optimization, if we can. Candidate
11668 variables are selected in check_return_expr. */
11669 if (current_function_return_value
)
11671 tree r
= current_function_return_value
;
11674 if (r
!= error_mark_node
11675 /* This is only worth doing for fns that return in memory--and
11676 simpler, since we don't have to worry about promoted modes. */
11677 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
11678 /* Only allow this for variables declared in the outer scope of
11679 the function so we know that their lifetime always ends with a
11680 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11681 we were to do this optimization in tree-ssa. */
11682 && (outer
= outer_curly_brace_block (fndecl
))
11683 && chain_member (r
, BLOCK_VARS (outer
)))
11684 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
11686 current_function_return_value
= NULL_TREE
;
11689 /* Remember that we were in class scope. */
11690 if (current_class_name
)
11691 ctype
= current_class_type
;
11693 /* Must mark the RESULT_DECL as being in this function. */
11694 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
11696 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11697 to the FUNCTION_DECL node itself. */
11698 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
11700 /* Save away current state, if appropriate. */
11701 if (!processing_template_decl
)
11702 save_function_data (fndecl
);
11704 /* Complain if there's just no return statement. */
11705 if (warn_return_type
11706 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
11707 && !dependent_type_p (TREE_TYPE (fntype
))
11708 && !current_function_returns_value
&& !current_function_returns_null
11709 /* Don't complain if we abort or throw. */
11710 && !current_function_returns_abnormally
11711 && !DECL_NAME (DECL_RESULT (fndecl
))
11712 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11713 inline function, as we might never be compiled separately. */
11714 && (DECL_INLINE (fndecl
) || processing_template_decl
)
11715 /* Structor return values (if any) are set by the compiler. */
11716 && !DECL_CONSTRUCTOR_P (fndecl
)
11717 && !DECL_DESTRUCTOR_P (fndecl
))
11718 warning (OPT_Wreturn_type
, "no return statement in function returning non-void");
11720 /* Store the end of the function, so that we get good line number
11721 info for the epilogue. */
11722 cfun
->function_end_locus
= input_location
;
11724 /* Genericize before inlining. */
11725 if (!processing_template_decl
)
11727 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
11728 cp_genericize (fndecl
);
11729 /* Clear out the bits we don't need. */
11730 f
->x_current_class_ptr
= NULL
;
11731 f
->x_current_class_ref
= NULL
;
11732 f
->x_eh_spec_block
= NULL
;
11733 f
->x_in_charge_parm
= NULL
;
11734 f
->x_vtt_parm
= NULL
;
11735 f
->x_return_value
= NULL
;
11736 f
->bindings
= NULL
;
11737 f
->extern_decl_map
= NULL
;
11739 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11740 c_warn_unused_result (&DECL_SAVED_TREE (fndecl
));
11742 /* Clear out the bits we don't need. */
11743 local_names
= NULL
;
11745 /* We're leaving the context of this function, so zap cfun. It's still in
11746 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11748 current_function_decl
= NULL
;
11750 /* If this is an in-class inline definition, we may have to pop the
11751 bindings for the template parameters that we added in
11752 maybe_begin_member_template_processing when start_function was
11754 if (inclass_inline
)
11755 maybe_end_member_template_processing ();
11757 /* Leave the scope of the class. */
11759 pop_nested_class ();
11765 /* Let the error reporting routines know that we're outside a
11766 function. For a nested function, this value is used in
11767 cxx_pop_function_context and then reset via pop_function_context. */
11768 current_function_decl
= NULL_TREE
;
11773 /* Create the FUNCTION_DECL for a function definition.
11774 DECLSPECS and DECLARATOR are the parts of the declaration;
11775 they describe the return type and the name of the function,
11776 but twisted together in a fashion that parallels the syntax of C.
11778 This function creates a binding context for the function body
11779 as well as setting up the FUNCTION_DECL in current_function_decl.
11781 Returns a FUNCTION_DECL on success.
11783 If the DECLARATOR is not suitable for a function (it defines a datum
11784 instead), we return 0, which tells yyparse to report a parse error.
11786 May return void_type_node indicating that this method is actually
11787 a friend. See grokfield for more details.
11789 Came here with a `.pushlevel' .
11791 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11792 CHANGES TO CODE IN `grokfield'. */
11795 start_method (cp_decl_specifier_seq
*declspecs
,
11796 const cp_declarator
*declarator
, tree attrlist
)
11798 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
11801 if (fndecl
== error_mark_node
)
11802 return error_mark_node
;
11804 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
11806 error ("invalid member function declaration");
11807 return error_mark_node
;
11811 cplus_decl_attributes (&fndecl
, attrlist
, 0);
11813 /* Pass friends other than inline friend functions back. */
11814 if (fndecl
== void_type_node
)
11817 if (DECL_IN_AGGR_P (fndecl
))
11819 if (DECL_CONTEXT (fndecl
)
11820 && TREE_CODE (DECL_CONTEXT (fndecl
)) != NAMESPACE_DECL
)
11821 error ("%qD is already defined in class %qT", fndecl
,
11822 DECL_CONTEXT (fndecl
));
11823 return error_mark_node
;
11826 check_template_shadow (fndecl
);
11828 DECL_DECLARED_INLINE_P (fndecl
) = 1;
11829 if (flag_default_inline
)
11830 DECL_INLINE (fndecl
) = 1;
11832 /* We process method specializations in finish_struct_1. */
11833 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
11835 fndecl
= push_template_decl (fndecl
);
11836 if (fndecl
== error_mark_node
)
11840 if (! DECL_FRIEND_P (fndecl
))
11842 if (TREE_CHAIN (fndecl
))
11844 fndecl
= copy_node (fndecl
);
11845 TREE_CHAIN (fndecl
) = NULL_TREE
;
11849 finish_decl (fndecl
, NULL_TREE
, NULL_TREE
);
11851 /* Make a place for the parms. */
11852 begin_scope (sk_function_parms
, fndecl
);
11854 DECL_IN_AGGR_P (fndecl
) = 1;
11858 /* Go through the motions of finishing a function definition.
11859 We don't compile this method until after the whole class has
11862 FINISH_METHOD must return something that looks as though it
11863 came from GROKFIELD (since we are defining a method, after all).
11865 This is called after parsing the body of the function definition.
11866 STMTS is the chain of statements that makes up the function body.
11868 DECL is the ..._DECL that `start_method' provided. */
11871 finish_method (tree decl
)
11873 tree fndecl
= decl
;
11878 if (decl
== void_type_node
)
11881 old_initial
= DECL_INITIAL (fndecl
);
11883 /* Undo the level for the parms (from start_method).
11884 This is like poplevel, but it causes nothing to be
11885 saved. Saving information here confuses symbol-table
11886 output routines. Besides, this information will
11887 be correctly output when this method is actually
11890 /* Clear out the meanings of the local variables of this level;
11891 also record in each decl which block it belongs to. */
11893 for (link
= current_binding_level
->names
; link
; link
= TREE_CHAIN (link
))
11895 if (DECL_NAME (link
) != NULL_TREE
)
11896 pop_binding (DECL_NAME (link
), link
);
11897 gcc_assert (TREE_CODE (link
) != FUNCTION_DECL
);
11898 DECL_CONTEXT (link
) = NULL_TREE
;
11901 poplevel (0, 0, 0);
11903 DECL_INITIAL (fndecl
) = old_initial
;
11905 /* We used to check if the context of FNDECL was different from
11906 current_class_type as another way to get inside here. This didn't work
11907 for String.cc in libg++. */
11908 if (DECL_FRIEND_P (fndecl
))
11910 VEC_safe_push (tree
, gc
, CLASSTYPE_INLINE_FRIENDS (current_class_type
),
11912 decl
= void_type_node
;
11919 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11920 we can lay it out later, when and if its type becomes complete. */
11923 maybe_register_incomplete_var (tree var
)
11925 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
11927 /* Keep track of variables with incomplete types. */
11928 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
11929 && DECL_EXTERNAL (var
))
11931 tree inner_type
= TREE_TYPE (var
);
11933 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
11934 inner_type
= TREE_TYPE (inner_type
);
11935 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
11937 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
11938 /* RTTI TD entries are created while defining the type_info. */
11939 || (TYPE_LANG_SPECIFIC (inner_type
)
11940 && TYPE_BEING_DEFINED (inner_type
)))
11941 incomplete_vars
= tree_cons (inner_type
, var
, incomplete_vars
);
11945 /* Called when a class type (given by TYPE) is defined. If there are
11946 any existing VAR_DECLs whose type hsa been completed by this
11947 declaration, update them now. */
11950 complete_vars (tree type
)
11952 tree
*list
= &incomplete_vars
;
11954 gcc_assert (CLASS_TYPE_P (type
));
11957 if (same_type_p (type
, TREE_PURPOSE (*list
)))
11959 tree var
= TREE_VALUE (*list
);
11960 tree type
= TREE_TYPE (var
);
11961 /* Complete the type of the variable. The VAR_DECL itself
11962 will be laid out in expand_expr. */
11963 complete_type (type
);
11964 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
11965 /* Remove this entry from the list. */
11966 *list
= TREE_CHAIN (*list
);
11969 list
= &TREE_CHAIN (*list
);
11972 /* Check for pending declarations which may have abstract type. */
11973 complete_type_check_abstract (type
);
11976 /* If DECL is of a type which needs a cleanup, build and return an
11977 expression to perform that cleanup here. Return NULL_TREE if no
11978 cleanup need be done. */
11981 cxx_maybe_build_cleanup (tree decl
)
11987 /* Assume no cleanup is required. */
11988 cleanup
= NULL_TREE
;
11990 if (error_operand_p (decl
))
11993 /* Handle "__attribute__((cleanup))". We run the cleanup function
11994 before the destructor since the destructor is what actually
11995 terminates the lifetime of the object. */
11996 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
12003 /* Get the name specified by the user for the cleanup function. */
12004 id
= TREE_VALUE (TREE_VALUE (attr
));
12005 /* Look up the name to find the cleanup function to call. It is
12006 important to use lookup_name here because that is what is
12007 used in c-common.c:handle_cleanup_attribute when performing
12008 initial checks on the attribute. Note that those checks
12009 include ensuring that the function found is not an overloaded
12010 function, or an object with an overloaded call operator,
12011 etc.; we can rely on the fact that the functionfound is an
12012 ordinary FUNCTION_DECL. */
12013 fn
= lookup_name (id
);
12014 arg
= build_address (decl
);
12016 cleanup
= build_function_call (fn
, build_tree_list (NULL_TREE
,
12019 /* Handle ordinary C++ destructors. */
12020 type
= TREE_TYPE (decl
);
12021 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
12023 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
12024 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
12025 && CLASSTYPE_VBASECLASSES (type
));
12029 if (TREE_CODE (type
) == ARRAY_TYPE
)
12033 cxx_mark_addressable (decl
);
12034 addr
= build_unary_op (ADDR_EXPR
, decl
, 0);
12037 /* Optimize for space over speed here. */
12038 if (!has_vbases
|| flag_expensive_optimizations
)
12039 flags
|= LOOKUP_NONVIRTUAL
;
12041 call
= build_delete (TREE_TYPE (addr
), addr
,
12042 sfk_complete_destructor
, flags
, 0);
12044 cleanup
= build_compound_expr (cleanup
, call
);
12052 /* When a stmt has been parsed, this function is called. */
12059 /* DECL was originally constructed as a non-static member function,
12060 but turned out to be static. Update it accordingly. */
12063 revert_static_member_fn (tree decl
)
12066 tree function
= TREE_TYPE (decl
);
12067 tree args
= TYPE_ARG_TYPES (function
);
12069 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args
)))
12070 != TYPE_UNQUALIFIED
)
12071 error ("static member function %q#D declared with type qualifiers", decl
);
12073 args
= TREE_CHAIN (args
);
12074 tmp
= build_function_type (TREE_TYPE (function
), args
);
12075 tmp
= build_qualified_type (tmp
, cp_type_quals (function
));
12076 tmp
= build_exception_variant (tmp
,
12077 TYPE_RAISES_EXCEPTIONS (function
));
12078 TREE_TYPE (decl
) = tmp
;
12079 if (DECL_ARGUMENTS (decl
))
12080 DECL_ARGUMENTS (decl
) = TREE_CHAIN (DECL_ARGUMENTS (decl
));
12081 DECL_STATIC_FUNCTION_P (decl
) = 1;
12084 /* Initialize the variables used during compilation of a C++
12088 cxx_push_function_context (struct function
* f
)
12090 struct language_function
*p
= GGC_CNEW (struct language_function
);
12093 /* Whenever we start a new function, we destroy temporaries in the
12095 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
12101 if (DECL_SAVED_FUNCTION_DATA (fn
))
12103 /* If we already parsed this function, and we're just expanding it
12104 now, restore saved state. */
12105 *cp_function_chain
= *DECL_SAVED_FUNCTION_DATA (fn
);
12107 /* We don't need the saved data anymore. Unless this is an inline
12108 function; we need the named return value info for
12109 declare_return_variable. */
12110 if (! DECL_INLINE (fn
))
12111 DECL_SAVED_FUNCTION_DATA (fn
) = NULL
;
12116 /* Free the language-specific parts of F, now that we've finished
12117 compiling the function. */
12120 cxx_pop_function_context (struct function
* f
)
12125 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12126 one of the language-independent trees. */
12128 enum cp_tree_node_structure_enum
12129 cp_tree_node_structure (union lang_tree_node
* t
)
12131 switch (TREE_CODE (&t
->generic
))
12133 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
12134 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
12135 case OVERLOAD
: return TS_CP_OVERLOAD
;
12136 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
12137 case PTRMEM_CST
: return TS_CP_PTRMEM
;
12138 case BASELINK
: return TS_CP_BASELINK
;
12139 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
12140 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
12141 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
12142 default: return TS_CP_GENERIC
;
12146 /* Build the void_list_node (void_type_node having been created). */
12148 build_void_list_node (void)
12150 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
12155 cp_missing_noreturn_ok_p (tree decl
)
12157 /* A missing noreturn is ok for the `main' function. */
12158 return DECL_MAIN_P (decl
);
12161 /* Return the COMDAT group into which DECL should be placed. */
12164 cxx_comdat_group (tree decl
)
12168 /* Virtual tables, construction virtual tables, and virtual table
12169 tables all go in a single COMDAT group, named after the primary
12171 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
12172 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
12173 /* For all other DECLs, the COMDAT group is the mangled name of the
12174 declaration itself. */
12177 while (DECL_THUNK_P (decl
))
12179 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12180 into the same section as the target function. In that case
12181 we must return target's name. */
12182 tree target
= THUNK_TARGET (decl
);
12183 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
12184 && DECL_SECTION_NAME (target
) != NULL
12185 && DECL_ONE_ONLY (target
))
12190 name
= DECL_ASSEMBLER_NAME (decl
);
12193 return IDENTIFIER_POINTER (name
);
12196 #include "gt-cp-decl.h"