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 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 2, 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 COPYING. If not, write to
20 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
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 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1102 If the redeclaration is invalid, a diagnostic is issued, and the
1103 error_mark_node is returned. Otherwise, OLDDECL is returned.
1105 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1108 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1111 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1113 unsigned olddecl_uid
= DECL_UID (olddecl
);
1114 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1115 int new_defines_function
= 0;
1118 if (newdecl
== olddecl
)
1121 types_match
= decls_match (newdecl
, olddecl
);
1123 /* If either the type of the new decl or the type of the old decl is an
1124 error_mark_node, then that implies that we have already issued an
1125 error (earlier) for some bogus type specification, and in that case,
1126 it is rather pointless to harass the user with yet more error message
1127 about the same declaration, so just pretend the types match here. */
1128 if (TREE_TYPE (newdecl
) == error_mark_node
1129 || TREE_TYPE (olddecl
) == error_mark_node
)
1130 return error_mark_node
;
1132 if (DECL_P (olddecl
)
1133 && TREE_CODE (newdecl
) == FUNCTION_DECL
1134 && TREE_CODE (olddecl
) == FUNCTION_DECL
1135 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1137 if (DECL_DECLARED_INLINE_P (newdecl
)
1138 && DECL_UNINLINABLE (newdecl
)
1139 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1140 /* Already warned elsewhere. */;
1141 else if (DECL_DECLARED_INLINE_P (olddecl
)
1142 && DECL_UNINLINABLE (olddecl
)
1143 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1144 /* Already warned. */;
1145 else if (DECL_DECLARED_INLINE_P (newdecl
)
1146 && DECL_UNINLINABLE (olddecl
)
1147 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1149 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1151 warning (OPT_Wattributes
, "previous declaration of %q+D "
1152 "with attribute noinline", olddecl
);
1154 else if (DECL_DECLARED_INLINE_P (olddecl
)
1155 && DECL_UNINLINABLE (newdecl
)
1156 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1158 warning (OPT_Wattributes
, "function %q+D redeclared with "
1159 "attribute noinline", newdecl
);
1160 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1165 /* Check for redeclaration and other discrepancies. */
1166 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1167 && DECL_ARTIFICIAL (olddecl
))
1169 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1170 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1172 /* Avoid warnings redeclaring built-ins which have not been
1173 explicitly declared. */
1174 if (DECL_ANTICIPATED (olddecl
))
1177 /* If you declare a built-in or predefined function name as static,
1178 the old definition is overridden, but optionally warn this was a
1179 bad choice of name. */
1180 if (! TREE_PUBLIC (newdecl
))
1182 warning (OPT_Wshadow
, "shadowing %s function %q#D",
1183 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1185 /* Discard the old built-in function. */
1188 /* If the built-in is not ansi, then programs can override
1189 it even globally without an error. */
1190 else if (! DECL_BUILT_IN (olddecl
))
1191 warning (0, "library function %q#D redeclared as non-function %q#D",
1195 error ("declaration of %q#D", newdecl
);
1196 error ("conflicts with built-in declaration %q#D",
1201 else if (!types_match
)
1203 /* Avoid warnings redeclaring built-ins which have not been
1204 explicitly declared. */
1205 if (DECL_ANTICIPATED (olddecl
))
1207 /* Deal with fileptr_type_node. FILE type is not known
1208 at the time we create the builtins. */
1211 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1212 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1214 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1217 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1219 tree t
= TREE_VALUE (t1
);
1221 if (TREE_CODE (t
) == POINTER_TYPE
1222 && TYPE_NAME (TREE_TYPE (t
))
1223 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1224 == get_identifier ("FILE")
1225 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1227 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1229 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1230 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1231 types_match
= decls_match (newdecl
, olddecl
);
1233 return duplicate_decls (newdecl
, olddecl
,
1235 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1238 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1241 else if ((DECL_EXTERN_C_P (newdecl
)
1242 && DECL_EXTERN_C_P (olddecl
))
1243 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1244 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1246 /* A near match; override the builtin. */
1248 if (TREE_PUBLIC (newdecl
))
1250 warning (0, "new declaration %q#D", newdecl
);
1251 warning (0, "ambiguates built-in declaration %q#D",
1255 warning (OPT_Wshadow
, "shadowing %s function %q#D",
1256 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1260 /* Discard the old built-in function. */
1263 /* Replace the old RTL to avoid problems with inlining. */
1264 COPY_DECL_RTL (newdecl
, olddecl
);
1266 /* Even if the types match, prefer the new declarations type for
1267 built-ins which have not been explicitly declared, for
1268 exception lists, etc... */
1269 else if (DECL_ANTICIPATED (olddecl
))
1271 tree type
= TREE_TYPE (newdecl
);
1272 tree attribs
= (*targetm
.merge_type_attributes
)
1273 (TREE_TYPE (olddecl
), type
);
1275 type
= cp_build_type_attribute_variant (type
, attribs
);
1276 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1279 /* Whether or not the builtin can throw exceptions has no
1280 bearing on this declarator. */
1281 TREE_NOTHROW (olddecl
) = 0;
1283 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1285 /* If a builtin function is redeclared as `static', merge
1286 the declarations, but make the original one static. */
1287 DECL_THIS_STATIC (olddecl
) = 1;
1288 TREE_PUBLIC (olddecl
) = 0;
1290 /* Make the old declaration consistent with the new one so
1291 that all remnants of the builtin-ness of this function
1292 will be banished. */
1293 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1294 COPY_DECL_RTL (newdecl
, olddecl
);
1297 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1299 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1300 && TREE_CODE (newdecl
) != TYPE_DECL
1301 && ! (TREE_CODE (newdecl
) == TEMPLATE_DECL
1302 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
))
1303 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1304 && TREE_CODE (olddecl
) != TYPE_DECL
1305 && ! (TREE_CODE (olddecl
) == TEMPLATE_DECL
1306 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1309 /* We do nothing special here, because C++ does such nasty
1310 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1311 get shadowed, and know that if we need to find a TYPE_DECL
1312 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1313 slot of the identifier. */
1317 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1318 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1319 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1320 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1323 error ("%q#D redeclared as different kind of symbol", newdecl
);
1324 if (TREE_CODE (olddecl
) == TREE_LIST
)
1325 olddecl
= TREE_VALUE (olddecl
);
1326 error ("previous declaration of %q+#D", olddecl
);
1328 return error_mark_node
;
1330 else if (!types_match
)
1332 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1333 /* These are certainly not duplicate declarations; they're
1334 from different scopes. */
1337 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1339 /* The name of a class template may not be declared to refer to
1340 any other template, class, function, object, namespace, value,
1341 or type in the same scope. */
1342 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1343 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1345 error ("declaration of template %q#D", newdecl
);
1346 error ("conflicts with previous declaration %q+#D", olddecl
);
1348 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1349 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1350 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1351 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1352 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1353 DECL_TEMPLATE_PARMS (olddecl
))
1354 /* Template functions can be disambiguated by
1356 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1357 TREE_TYPE (TREE_TYPE (olddecl
))))
1359 error ("new declaration %q#D", newdecl
);
1360 error ("ambiguates old declaration %q+#D", olddecl
);
1364 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1366 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1368 error ("declaration of C function %q#D conflicts with",
1370 error ("previous declaration %q+#D here", olddecl
);
1372 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1373 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1375 error ("new declaration %q#D", newdecl
);
1376 error ("ambiguates old declaration %q+#D", olddecl
);
1377 return error_mark_node
;
1384 error ("conflicting declaration %q#D", newdecl
);
1385 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1386 return error_mark_node
;
1389 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1390 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1391 && (!DECL_TEMPLATE_INFO (newdecl
)
1392 || (DECL_TI_TEMPLATE (newdecl
)
1393 != DECL_TI_TEMPLATE (olddecl
))))
1394 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1395 && (!DECL_TEMPLATE_INFO (olddecl
)
1396 || (DECL_TI_TEMPLATE (olddecl
)
1397 != DECL_TI_TEMPLATE (newdecl
))))))
1398 /* It's OK to have a template specialization and a non-template
1399 with the same type, or to have specializations of two
1400 different templates with the same type. Note that if one is a
1401 specialization, and the other is an instantiation of the same
1402 template, that we do not exit at this point. That situation
1403 can occur if we instantiate a template class, and then
1404 specialize one of its methods. This situation is valid, but
1405 the declarations must be merged in the usual way. */
1407 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1408 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1409 && !DECL_USE_TEMPLATE (newdecl
))
1410 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1411 && !DECL_USE_TEMPLATE (olddecl
))))
1412 /* One of the declarations is a template instantiation, and the
1413 other is not a template at all. That's OK. */
1415 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1417 /* In [namespace.alias] we have:
1419 In a declarative region, a namespace-alias-definition can be
1420 used to redefine a namespace-alias declared in that declarative
1421 region to refer only to the namespace to which it already
1424 Therefore, if we encounter a second alias directive for the same
1425 alias, we can just ignore the second directive. */
1426 if (DECL_NAMESPACE_ALIAS (newdecl
)
1427 && (DECL_NAMESPACE_ALIAS (newdecl
)
1428 == DECL_NAMESPACE_ALIAS (olddecl
)))
1430 /* [namespace.alias]
1432 A namespace-name or namespace-alias shall not be declared as
1433 the name of any other entity in the same declarative region.
1434 A namespace-name defined at global scope shall not be
1435 declared as the name of any other entity in any global scope
1437 error ("declaration of namespace %qD conflicts with", newdecl
);
1438 error ("previous declaration of namespace %q+D here", olddecl
);
1439 return error_mark_node
;
1443 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1446 error (errmsg
, newdecl
);
1447 if (DECL_NAME (olddecl
) != NULL_TREE
)
1448 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1449 ? "%q+#D previously defined here"
1450 : "%q+#D previously declared here", olddecl
);
1451 return error_mark_node
;
1453 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1454 && DECL_INITIAL (olddecl
) != NULL_TREE
1455 && TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) == NULL_TREE
1456 && TYPE_ARG_TYPES (TREE_TYPE (newdecl
)) != NULL_TREE
)
1458 /* Prototype decl follows defn w/o prototype. */
1459 warning (0, "prototype for %q+#D", newdecl
);
1460 warning (0, "%Jfollows non-prototype definition here", olddecl
);
1462 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1463 || TREE_CODE (olddecl
) == VAR_DECL
)
1464 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1467 If two declarations of the same function or object
1468 specify different linkage-specifications ..., the program
1469 is ill-formed.... Except for functions with C++ linkage,
1470 a function declaration without a linkage specification
1471 shall not precede the first linkage specification for
1472 that function. A function can be declared without a
1473 linkage specification after an explicit linkage
1474 specification has been seen; the linkage explicitly
1475 specified in the earlier declaration is not affected by
1476 such a function declaration.
1478 DR 563 raises the question why the restrictions on
1479 functions should not also apply to objects. Older
1480 versions of G++ silently ignore the linkage-specification
1488 which is clearly wrong. Therefore, we now treat objects
1490 if (current_lang_depth () == 0)
1492 /* There is no explicit linkage-specification, so we use
1493 the linkage from the previous declaration. */
1494 if (!DECL_LANG_SPECIFIC (newdecl
))
1495 retrofit_lang_decl (newdecl
);
1496 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1500 error ("previous declaration of %q+#D with %qL linkage",
1501 olddecl
, DECL_LANGUAGE (olddecl
));
1502 error ("conflicts with new declaration with %qL linkage",
1503 DECL_LANGUAGE (newdecl
));
1507 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1509 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1511 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1512 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1515 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1516 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1518 for (; t1
&& t1
!= void_list_node
;
1519 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1520 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1522 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1525 pedwarn ("default argument given for parameter %d of %q#D",
1527 pedwarn ("after previous specification in %q+#D", olddecl
);
1531 error ("default argument given for parameter %d of %q#D",
1533 error ("after previous specification in %q+#D",
1538 if (DECL_DECLARED_INLINE_P (newdecl
)
1539 && ! DECL_DECLARED_INLINE_P (olddecl
)
1540 && TREE_ADDRESSABLE (olddecl
) && warn_inline
)
1542 warning (0, "%q#D was used before it was declared inline", newdecl
);
1543 warning (0, "%Jprevious non-inline declaration here", olddecl
);
1548 /* Do not merge an implicit typedef with an explicit one. In:
1552 typedef class A A __attribute__ ((foo));
1554 the attribute should apply only to the typedef. */
1555 if (TREE_CODE (olddecl
) == TYPE_DECL
1556 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1557 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1560 /* If new decl is `static' and an `extern' was seen previously,
1562 warn_extern_redeclared_static (newdecl
, olddecl
);
1564 /* We have committed to returning 1 at this point. */
1565 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1567 /* Now that functions must hold information normally held
1568 by field decls, there is extra work to do so that
1569 declaration information does not get destroyed during
1571 if (DECL_VINDEX (olddecl
))
1572 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1573 if (DECL_CONTEXT (olddecl
))
1574 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1575 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1576 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1577 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1578 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1579 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1580 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1581 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1582 SET_OVERLOADED_OPERATOR_CODE
1583 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1584 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1586 /* Optionally warn about more than one declaration for the same
1587 name, but don't warn about a function declaration followed by a
1589 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1590 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1591 /* Don't warn about extern decl followed by definition. */
1592 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1593 /* Don't warn about friends, let add_friend take care of it. */
1594 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
)))
1596 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1597 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1601 /* Deal with C++: must preserve virtual function table size. */
1602 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1604 tree newtype
= TREE_TYPE (newdecl
);
1605 tree oldtype
= TREE_TYPE (olddecl
);
1607 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1608 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1609 CLASSTYPE_FRIEND_CLASSES (newtype
)
1610 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1612 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1615 /* Copy all the DECL_... slots specified in the new decl
1616 except for any that we copy here from the old type. */
1617 DECL_ATTRIBUTES (newdecl
)
1618 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1620 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1624 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1625 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1626 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1627 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1628 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1629 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1631 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1633 DECL_INLINE (old_result
)
1634 |= DECL_INLINE (new_result
);
1635 DECL_DECLARED_INLINE_P (old_result
)
1636 |= DECL_DECLARED_INLINE_P (new_result
);
1637 check_redeclaration_exception_specification (newdecl
, olddecl
);
1640 /* If the new declaration is a definition, update the file and
1641 line information on the declaration, and also make
1642 the old declaration the same definition. */
1643 if (DECL_INITIAL (old_result
) == NULL_TREE
1644 && DECL_INITIAL (new_result
) != NULL_TREE
)
1646 DECL_SOURCE_LOCATION (olddecl
)
1647 = DECL_SOURCE_LOCATION (old_result
)
1648 = DECL_SOURCE_LOCATION (newdecl
);
1649 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1650 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1651 DECL_ARGUMENTS (old_result
)
1652 = DECL_ARGUMENTS (new_result
);
1660 /* Automatically handles default parameters. */
1661 tree oldtype
= TREE_TYPE (olddecl
);
1664 /* Merge the data types specified in the two decls. */
1665 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1667 /* If merge_types produces a non-typedef type, just use the old type. */
1668 if (TREE_CODE (newdecl
) == TYPE_DECL
1669 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1672 if (TREE_CODE (newdecl
) == VAR_DECL
)
1674 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1675 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1676 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1677 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1678 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1679 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1681 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1682 if (DECL_LANG_SPECIFIC (olddecl
)
1683 && CP_DECL_THREADPRIVATE_P (olddecl
))
1685 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1686 if (!DECL_LANG_SPECIFIC (newdecl
))
1687 retrofit_lang_decl (newdecl
);
1689 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1690 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1694 /* Do this after calling `merge_types' so that default
1695 parameters don't confuse us. */
1696 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1697 check_redeclaration_exception_specification (newdecl
, olddecl
);
1698 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1700 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1701 check_default_args (newdecl
);
1703 /* Lay the type out, unless already done. */
1704 if (! same_type_p (newtype
, oldtype
)
1705 && TREE_TYPE (newdecl
) != error_mark_node
1706 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1707 layout_type (TREE_TYPE (newdecl
));
1709 if ((TREE_CODE (newdecl
) == VAR_DECL
1710 || TREE_CODE (newdecl
) == PARM_DECL
1711 || TREE_CODE (newdecl
) == RESULT_DECL
1712 || TREE_CODE (newdecl
) == FIELD_DECL
1713 || TREE_CODE (newdecl
) == TYPE_DECL
)
1714 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1715 layout_decl (newdecl
, 0);
1717 /* Merge the type qualifiers. */
1718 if (TREE_READONLY (newdecl
))
1719 TREE_READONLY (olddecl
) = 1;
1720 if (TREE_THIS_VOLATILE (newdecl
))
1721 TREE_THIS_VOLATILE (olddecl
) = 1;
1722 if (TREE_NOTHROW (newdecl
))
1723 TREE_NOTHROW (olddecl
) = 1;
1725 /* Merge deprecatedness. */
1726 if (TREE_DEPRECATED (newdecl
))
1727 TREE_DEPRECATED (olddecl
) = 1;
1729 /* Merge the initialization information. */
1730 if (DECL_INITIAL (newdecl
) == NULL_TREE
1731 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1733 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1734 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1735 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl
)
1736 && DECL_LANG_SPECIFIC (newdecl
)
1737 && DECL_LANG_SPECIFIC (olddecl
))
1739 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1740 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1744 /* Merge the section attribute.
1745 We want to issue an error if the sections conflict but that must be
1746 done later in decl_attributes since we are called before attributes
1748 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1749 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1751 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1753 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1754 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1755 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1756 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1757 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1758 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1759 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1760 DECL_IS_PURE (newdecl
) |= DECL_IS_PURE (olddecl
);
1761 /* Keep the old RTL. */
1762 COPY_DECL_RTL (olddecl
, newdecl
);
1764 else if (TREE_CODE (newdecl
) == VAR_DECL
1765 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1767 /* Keep the old RTL. We cannot keep the old RTL if the old
1768 declaration was for an incomplete object and the new
1769 declaration is not since many attributes of the RTL will
1771 COPY_DECL_RTL (olddecl
, newdecl
);
1774 /* If cannot merge, then use the new type and qualifiers,
1775 and don't preserve the old rtl. */
1778 /* Clean out any memory we had of the old declaration. */
1779 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1781 TREE_VALUE (oldstatic
) = error_mark_node
;
1783 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1784 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1785 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1786 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1789 /* Merge the storage class information. */
1790 merge_weak (newdecl
, olddecl
);
1792 DECL_ONE_ONLY (newdecl
) |= DECL_ONE_ONLY (olddecl
);
1793 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1794 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1795 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1796 if (! DECL_EXTERNAL (olddecl
))
1797 DECL_EXTERNAL (newdecl
) = 0;
1799 new_template
= NULL_TREE
;
1800 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1802 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1803 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1804 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1805 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1806 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1808 /* If the OLDDECL is an instantiation and/or specialization,
1809 then the NEWDECL must be too. But, it may not yet be marked
1810 as such if the caller has created NEWDECL, but has not yet
1811 figured out that it is a redeclaration. */
1812 if (!DECL_USE_TEMPLATE (newdecl
))
1813 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
1815 /* Don't really know how much of the language-specific
1816 values we should copy from old to new. */
1817 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
1818 DECL_LANG_SPECIFIC (newdecl
)->decl_flags
.u2
=
1819 DECL_LANG_SPECIFIC (olddecl
)->decl_flags
.u2
;
1820 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
1821 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
1822 if (DECL_TEMPLATE_INFO (newdecl
))
1823 new_template
= DECL_TI_TEMPLATE (newdecl
);
1824 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
1825 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
1826 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
1827 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1828 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1829 && DECL_HIDDEN_FRIEND_P (olddecl
)
1830 && newdecl_is_friend
);
1832 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1833 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1834 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
1836 DECL_BEFRIENDING_CLASSES (newdecl
)
1837 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
1838 DECL_BEFRIENDING_CLASSES (olddecl
));
1839 /* DECL_THUNKS is only valid for virtual functions,
1840 otherwise it is a DECL_FRIEND_CONTEXT. */
1841 if (DECL_VIRTUAL_P (newdecl
))
1842 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
1846 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1848 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
1849 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
1851 /* If newdecl is not a specialization, then it is not a
1852 template-related function at all. And that means that we
1853 should have exited above, returning 0. */
1854 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
1856 if (TREE_USED (olddecl
))
1857 /* From [temp.expl.spec]:
1859 If a template, a member template or the member of a class
1860 template is explicitly specialized then that
1861 specialization shall be declared before the first use of
1862 that specialization that would cause an implicit
1863 instantiation to take place, in every translation unit in
1864 which such a use occurs. */
1865 error ("explicit specialization of %qD after first use",
1868 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
1870 /* Don't propagate visibility from the template to the
1871 specialization here. We'll do that in determine_visibility if
1873 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
1875 /* [temp.expl.spec/14] We don't inline explicit specialization
1876 just because the primary template says so. */
1880 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
1881 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
1883 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
1885 /* If either decl says `inline', this fn is inline, unless
1886 its definition was passed already. */
1887 if (DECL_INLINE (newdecl
) && DECL_INITIAL (olddecl
) == NULL_TREE
)
1888 DECL_INLINE (olddecl
) = 1;
1889 DECL_INLINE (newdecl
) = DECL_INLINE (olddecl
);
1891 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
1892 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
1895 /* Preserve abstractness on cloned [cd]tors. */
1896 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
1900 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1901 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
1902 COPY_DECL_RTL (newdecl
, olddecl
);
1904 if (! types_match
|| new_defines_function
)
1906 /* These need to be copied so that the names are available.
1907 Note that if the types do match, we'll preserve inline
1908 info and other bits, but if not, we won't. */
1909 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
1910 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
1912 if (new_defines_function
)
1913 /* If defining a function declared with other language
1914 linkage, use the previously declared language linkage. */
1915 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1916 else if (types_match
)
1918 /* If redeclaring a builtin function, and not a definition,
1919 it stays built in. */
1920 if (DECL_BUILT_IN (olddecl
))
1922 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
1923 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
1924 /* If we're keeping the built-in definition, keep the rtl,
1925 regardless of declaration matches. */
1926 COPY_DECL_RTL (olddecl
, newdecl
);
1929 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
1930 /* Don't clear out the arguments if we're redefining a function. */
1931 if (DECL_ARGUMENTS (olddecl
))
1932 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
1935 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1936 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
1938 /* Now preserve various other info from the definition. */
1939 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
1940 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
1941 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
1942 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
1944 /* Warn about conflicting visibility specifications. */
1945 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
1946 && DECL_VISIBILITY_SPECIFIED (newdecl
)
1947 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
1949 warning (OPT_Wattributes
, "%q+D: visibility attribute ignored "
1950 "because it", newdecl
);
1951 warning (OPT_Wattributes
, "%Jconflicts with previous "
1952 "declaration here", olddecl
);
1954 /* Choose the declaration which specified visibility. */
1955 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
1957 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
1958 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
1960 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1961 so keep this behavior. */
1962 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
1964 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
1965 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
1968 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1969 with that from NEWDECL below. */
1970 if (DECL_LANG_SPECIFIC (olddecl
))
1972 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
1973 != DECL_LANG_SPECIFIC (newdecl
));
1974 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
1977 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1981 function_size
= sizeof (struct tree_decl_common
);
1983 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
1984 (char *) newdecl
+ sizeof (struct tree_common
),
1985 function_size
- sizeof (struct tree_common
));
1987 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
1988 (char *) newdecl
+ sizeof (struct tree_decl_common
),
1989 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
1991 /* If newdecl is a template instantiation, it is possible that
1992 the following sequence of events has occurred:
1994 o A friend function was declared in a class template. The
1995 class template was instantiated.
1997 o The instantiation of the friend declaration was
1998 recorded on the instantiation list, and is newdecl.
2000 o Later, however, instantiate_class_template called pushdecl
2001 on the newdecl to perform name injection. But, pushdecl in
2002 turn called duplicate_decls when it discovered that another
2003 declaration of a global function with the same name already
2006 o Here, in duplicate_decls, we decided to clobber newdecl.
2008 If we're going to do that, we'd better make sure that
2009 olddecl, and not newdecl, is on the list of
2010 instantiations so that if we try to do the instantiation
2011 again we won't get the clobbered declaration. */
2012 reregister_specialization (newdecl
,
2018 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2019 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2020 (char *) newdecl
+ sizeof (struct tree_common
),
2021 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2022 switch (TREE_CODE (olddecl
))
2032 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2033 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2034 size
- sizeof (struct tree_decl_common
)
2035 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2039 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2040 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2041 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2042 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2046 DECL_UID (olddecl
) = olddecl_uid
;
2048 DECL_FRIEND_P (olddecl
) = 1;
2051 DECL_ANTICIPATED (olddecl
) = 1;
2052 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2055 /* NEWDECL contains the merged attribute lists.
2056 Update OLDDECL to be the same. */
2057 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2059 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2060 so that encode_section_info has a chance to look at the new decl
2061 flags and attributes. */
2062 if (DECL_RTL_SET_P (olddecl
)
2063 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2064 || (TREE_CODE (olddecl
) == VAR_DECL
2065 && TREE_STATIC (olddecl
))))
2066 make_decl_rtl (olddecl
);
2068 /* The NEWDECL will no longer be needed. Because every out-of-class
2069 declaration of a member results in a call to duplicate_decls,
2070 freeing these nodes represents in a significant savings. */
2076 /* Return zero if the declaration NEWDECL is valid
2077 when the declaration OLDDECL (assumed to be for the same name)
2078 has already been seen.
2079 Otherwise return an error message format string with a %s
2080 where the identifier should go. */
2083 redeclaration_error_message (tree newdecl
, tree olddecl
)
2085 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2087 /* Because C++ can put things into name space for free,
2088 constructs like "typedef struct foo { ... } foo"
2089 would look like an erroneous redeclaration. */
2090 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2093 return "redefinition of %q#D";
2095 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2097 /* If this is a pure function, its olddecl will actually be
2098 the original initialization to `0' (which we force to call
2099 abort()). Don't complain about redefinition in this case. */
2100 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2101 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2104 /* If both functions come from different namespaces, this is not
2105 a redeclaration - this is a conflict with a used function. */
2106 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2107 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2108 && ! decls_match (olddecl
, newdecl
))
2109 return "%qD conflicts with used function";
2111 /* We'll complain about linkage mismatches in
2112 warn_extern_redeclared_static. */
2114 /* Defining the same name twice is no good. */
2115 if (DECL_INITIAL (olddecl
) != NULL_TREE
2116 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2118 if (DECL_NAME (olddecl
) == NULL_TREE
)
2119 return "%q#D not declared in class";
2121 return "redefinition of %q#D";
2125 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2129 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2131 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2132 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2133 return "redefinition of %q#D";
2137 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2138 || (DECL_TEMPLATE_RESULT (newdecl
)
2139 == DECL_TEMPLATE_RESULT (olddecl
)))
2142 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2143 if (DECL_TEMPLATE_INFO (nt
))
2144 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2145 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2146 if (DECL_TEMPLATE_INFO (ot
))
2147 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2148 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
))
2149 return "redefinition of %q#D";
2153 else if (TREE_CODE (newdecl
) == VAR_DECL
2154 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2155 && (! DECL_LANG_SPECIFIC (olddecl
)
2156 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2157 || DECL_THREAD_LOCAL_P (newdecl
)))
2159 /* Only variables can be thread-local, and all declarations must
2160 agree on this property. */
2161 if (DECL_THREAD_LOCAL_P (newdecl
))
2162 return "thread-local declaration of %q#D follows "
2163 "non-thread-local declaration";
2165 return "non-thread-local declaration of %q#D follows "
2166 "thread-local declaration";
2168 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2170 /* Objects declared at top level: */
2171 /* If at least one is a reference, it's ok. */
2172 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2174 /* Reject two definitions. */
2175 return "redefinition of %q#D";
2179 /* Objects declared with block scope: */
2180 /* Reject two definitions, and reject a definition
2181 together with an external reference. */
2182 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2183 return "redeclaration of %q#D";
2188 /* Hash and equality functions for the named_label table. */
2191 named_label_entry_hash (const void *data
)
2193 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2194 return DECL_UID (ent
->label_decl
);
2198 named_label_entry_eq (const void *a
, const void *b
)
2200 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2201 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2202 return ent_a
->label_decl
== ent_b
->label_decl
;
2205 /* Create a new label, named ID. */
2208 make_label_decl (tree id
, int local_p
)
2210 struct named_label_entry
*ent
;
2214 decl
= build_decl (LABEL_DECL
, id
, void_type_node
);
2216 DECL_CONTEXT (decl
) = current_function_decl
;
2217 DECL_MODE (decl
) = VOIDmode
;
2218 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2220 /* Say where one reference is to the label, for the sake of the
2221 error if it is not defined. */
2222 DECL_SOURCE_LOCATION (decl
) = input_location
;
2224 /* Record the fact that this identifier is bound to this label. */
2225 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2227 /* Create the label htab for the function on demand. */
2229 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2230 named_label_entry_eq
, NULL
);
2232 /* Record this label on the list of labels used in this function.
2233 We do this before calling make_label_decl so that we get the
2234 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2235 ent
= GGC_CNEW (struct named_label_entry
);
2236 ent
->label_decl
= decl
;
2238 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2239 gcc_assert (*slot
== NULL
);
2245 /* Look for a label named ID in the current function. If one cannot
2246 be found, create one. (We keep track of used, but undefined,
2247 labels, and complain about them at the end of a function.) */
2250 lookup_label (tree id
)
2254 timevar_push (TV_NAME_LOOKUP
);
2255 /* You can't use labels at global scope. */
2256 if (current_function_decl
== NULL_TREE
)
2258 error ("label %qE referenced outside of any function", id
);
2259 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, NULL_TREE
);
2262 /* See if we've already got this label. */
2263 decl
= IDENTIFIER_LABEL_VALUE (id
);
2264 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2265 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2267 decl
= make_label_decl (id
, /*local_p=*/0);
2268 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2271 /* Declare a local label named ID. */
2274 declare_local_label (tree id
)
2278 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2279 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2280 shadow
= tree_cons (IDENTIFIER_LABEL_VALUE (id
), NULL_TREE
,
2281 current_binding_level
->shadowed_labels
);
2282 current_binding_level
->shadowed_labels
= shadow
;
2284 decl
= make_label_decl (id
, /*local_p=*/1);
2285 TREE_VALUE (shadow
) = decl
;
2290 /* Returns nonzero if it is ill-formed to jump past the declaration of
2291 DECL. Returns 2 if it's also a real problem. */
2294 decl_jump_unsafe (tree decl
)
2296 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2297 || TREE_TYPE (decl
) == error_mark_node
)
2300 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
2301 || DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2304 if (pod_type_p (TREE_TYPE (decl
)))
2307 /* The POD stuff is just pedantry; why should it matter if the class
2308 contains a field of pointer to member type? */
2312 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2315 identify_goto (tree decl
, const location_t
*locus
)
2318 pedwarn ("jump to label %qD", decl
);
2320 pedwarn ("jump to case label");
2322 pedwarn ("%H from here", locus
);
2325 /* Check that a single previously seen jump to a newly defined label
2326 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2327 the jump context; NAMES are the names in scope in LEVEL at the jump
2328 context; LOCUS is the source position of the jump or 0. Returns
2329 true if all is well. */
2332 check_previous_goto_1 (tree decl
, struct cp_binding_level
* level
, tree names
,
2333 bool exited_omp
, const location_t
*locus
)
2335 struct cp_binding_level
*b
;
2336 bool identified
= false, saw_eh
= false, saw_omp
= false;
2340 identify_goto (decl
, locus
);
2341 error (" exits OpenMP structured block");
2342 identified
= saw_omp
= true;
2345 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2347 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2349 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2350 new_decls
= TREE_CHAIN (new_decls
))
2352 int problem
= decl_jump_unsafe (new_decls
);
2358 identify_goto (decl
, locus
);
2362 error (" crosses initialization of %q+#D", new_decls
);
2364 pedwarn (" enters scope of non-POD %q+#D", new_decls
);
2369 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2373 identify_goto (decl
, locus
);
2376 if (b
->kind
== sk_try
)
2377 error (" enters try block");
2379 error (" enters catch block");
2382 if (b
->kind
== sk_omp
&& !saw_omp
)
2386 identify_goto (decl
, locus
);
2389 error (" enters OpenMP structured block");
2398 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2400 check_previous_goto_1 (decl
, use
->binding_level
,
2401 use
->names_in_scope
, use
->in_omp_scope
,
2402 &use
->o_goto_locus
);
2406 check_switch_goto (struct cp_binding_level
* level
)
2408 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2411 /* Check that a new jump to a label DECL is OK. Called by
2412 finish_goto_stmt. */
2415 check_goto (tree decl
)
2417 struct named_label_entry
*ent
, dummy
;
2418 bool saw_catch
= false, identified
= false;
2421 /* We can't know where a computed goto is jumping.
2422 So we assume that it's OK. */
2423 if (TREE_CODE (decl
) != LABEL_DECL
)
2426 /* We didn't record any information about this label when we created it,
2427 and there's not much point since it's trivial to analyze as a return. */
2428 if (decl
== cdtor_label
)
2431 dummy
.label_decl
= decl
;
2432 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2433 gcc_assert (ent
!= NULL
);
2435 /* If the label hasn't been defined yet, defer checking. */
2436 if (! DECL_INITIAL (decl
))
2438 struct named_label_use_entry
*new_use
;
2440 /* Don't bother creating another use if the last goto had the
2441 same data, and will therefore create the same set of errors. */
2443 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2446 new_use
= GGC_NEW (struct named_label_use_entry
);
2447 new_use
->binding_level
= current_binding_level
;
2448 new_use
->names_in_scope
= current_binding_level
->names
;
2449 new_use
->o_goto_locus
= input_location
;
2450 new_use
->in_omp_scope
= false;
2452 new_use
->next
= ent
->uses
;
2453 ent
->uses
= new_use
;
2457 if (ent
->in_try_scope
|| ent
->in_catch_scope
2458 || ent
->in_omp_scope
|| ent
->bad_decls
)
2460 pedwarn ("jump to label %q+D", decl
);
2461 pedwarn (" from here");
2465 for (bad
= ent
->bad_decls
; bad
; bad
= TREE_CHAIN (bad
))
2467 tree b
= TREE_VALUE (bad
);
2468 int u
= decl_jump_unsafe (b
);
2470 if (u
> 1 && DECL_ARTIFICIAL (b
))
2472 /* Can't skip init of __exception_info. */
2473 error ("%J enters catch block", b
);
2477 error (" skips initialization of %q+#D", b
);
2479 pedwarn (" enters scope of non-POD %q+#D", b
);
2482 if (ent
->in_try_scope
)
2483 error (" enters try block");
2484 else if (ent
->in_catch_scope
&& !saw_catch
)
2485 error (" enters catch block");
2487 if (ent
->in_omp_scope
)
2488 error (" enters OpenMP structured block");
2489 else if (flag_openmp
)
2491 struct cp_binding_level
*b
;
2492 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2494 if (b
== ent
->binding_level
)
2496 if (b
->kind
== sk_omp
)
2500 pedwarn ("jump to label %q+D", decl
);
2501 pedwarn (" from here");
2504 error (" exits OpenMP structured block");
2511 /* Check that a return is ok wrt OpenMP structured blocks.
2512 Called by finish_return_stmt. Returns true if all is well. */
2515 check_omp_return (void)
2517 struct cp_binding_level
*b
;
2518 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2519 if (b
->kind
== sk_omp
)
2521 error ("invalid exit from OpenMP structured block");
2527 /* Define a label, specifying the location in the source file.
2528 Return the LABEL_DECL node for the label. */
2531 define_label (location_t location
, tree name
)
2533 struct named_label_entry
*ent
, dummy
;
2534 struct cp_binding_level
*p
;
2537 timevar_push (TV_NAME_LOOKUP
);
2539 decl
= lookup_label (name
);
2541 dummy
.label_decl
= decl
;
2542 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2543 gcc_assert (ent
!= NULL
);
2545 /* After labels, make any new cleanups in the function go into their
2546 own new (temporary) binding contour. */
2547 for (p
= current_binding_level
;
2548 p
->kind
!= sk_function_parms
;
2550 p
->more_cleanups_ok
= 0;
2552 if (name
== get_identifier ("wchar_t"))
2553 pedwarn ("label named wchar_t");
2555 if (DECL_INITIAL (decl
) != NULL_TREE
)
2557 error ("duplicate label %qD", decl
);
2558 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
2562 struct named_label_use_entry
*use
;
2564 /* Mark label as having been defined. */
2565 DECL_INITIAL (decl
) = error_mark_node
;
2566 /* Say where in the source. */
2567 DECL_SOURCE_LOCATION (decl
) = location
;
2569 ent
->binding_level
= current_binding_level
;
2570 ent
->names_in_scope
= current_binding_level
->names
;
2572 for (use
= ent
->uses
; use
; use
= use
->next
)
2573 check_previous_goto (decl
, use
);
2577 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2582 struct cp_binding_level
*level
;
2583 struct cp_switch
*next
;
2584 /* The SWITCH_STMT being built. */
2586 /* A splay-tree mapping the low element of a case range to the high
2587 element, or NULL_TREE if there is no high element. Used to
2588 determine whether or not a new case label duplicates an old case
2589 label. We need a tree, rather than simply a hash table, because
2590 of the GNU case range extension. */
2594 /* A stack of the currently active switch statements. The innermost
2595 switch statement is on the top of the stack. There is no need to
2596 mark the stack for garbage collection because it is only active
2597 during the processing of the body of a function, and we never
2598 collect at that point. */
2600 static struct cp_switch
*switch_stack
;
2602 /* Called right after a switch-statement condition is parsed.
2603 SWITCH_STMT is the switch statement being parsed. */
2606 push_switch (tree switch_stmt
)
2608 struct cp_switch
*p
= XNEW (struct cp_switch
);
2609 p
->level
= current_binding_level
;
2610 p
->next
= switch_stack
;
2611 p
->switch_stmt
= switch_stmt
;
2612 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2619 struct cp_switch
*cs
= switch_stack
;
2620 location_t switch_location
;
2622 /* Emit warnings as needed. */
2623 if (EXPR_HAS_LOCATION (cs
->switch_stmt
))
2624 switch_location
= EXPR_LOCATION (cs
->switch_stmt
);
2626 switch_location
= input_location
;
2627 if (!processing_template_decl
)
2628 c_do_switch_warnings (cs
->cases
, switch_location
,
2629 SWITCH_STMT_TYPE (cs
->switch_stmt
),
2630 SWITCH_STMT_COND (cs
->switch_stmt
));
2632 splay_tree_delete (cs
->cases
);
2633 switch_stack
= switch_stack
->next
;
2637 /* Note that we've seen a definition of a case label, and complain if this
2638 is a bad place for one. */
2641 finish_case_label (tree low_value
, tree high_value
)
2644 struct cp_binding_level
*p
;
2646 if (processing_template_decl
)
2650 /* For templates, just add the case label; we'll do semantic
2651 analysis at instantiation-time. */
2652 label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2653 return add_stmt (build_case_label (low_value
, high_value
, label
));
2656 /* Find the condition on which this switch statement depends. */
2657 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
2658 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
2659 cond
= TREE_VALUE (cond
);
2661 if (!check_switch_goto (switch_stack
->level
))
2662 return error_mark_node
;
2664 r
= c_add_case_label (switch_stack
->cases
, cond
, TREE_TYPE (cond
),
2665 low_value
, high_value
);
2667 /* After labels, make any new cleanups in the function go into their
2668 own new (temporary) binding contour. */
2669 for (p
= current_binding_level
;
2670 p
->kind
!= sk_function_parms
;
2672 p
->more_cleanups_ok
= 0;
2677 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2680 typename_hash (const void* k
)
2685 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
2686 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
2691 typedef struct typename_info
{
2699 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2700 really of type `typename_info*' */
2703 typename_compare (const void * k1
, const void * k2
)
2706 const typename_info
*t2
;
2709 t2
= (const typename_info
*) k2
;
2711 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
2712 && TYPE_CONTEXT (t1
) == t2
->scope
2713 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
2714 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
2715 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
2718 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2719 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2721 Returns the new TYPENAME_TYPE. */
2723 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
2726 build_typename_type (tree context
, tree name
, tree fullname
,
2727 enum tag_types tag_type
)
2735 if (typename_htab
== NULL
)
2736 typename_htab
= htab_create_ggc (61, &typename_hash
,
2737 &typename_compare
, NULL
);
2739 ti
.scope
= FROB_CONTEXT (context
);
2741 ti
.template_id
= fullname
;
2742 ti
.enum_p
= tag_type
== enum_type
;
2743 ti
.class_p
= (tag_type
== class_type
2744 || tag_type
== record_type
2745 || tag_type
== union_type
);
2746 hash
= (htab_hash_pointer (ti
.scope
)
2747 ^ htab_hash_pointer (ti
.name
));
2749 /* See if we already have this type. */
2750 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
2755 /* Build the TYPENAME_TYPE. */
2756 t
= make_aggr_type (TYPENAME_TYPE
);
2757 TYPE_CONTEXT (t
) = ti
.scope
;
2758 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
2759 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
2760 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
2762 /* Build the corresponding TYPE_DECL. */
2763 d
= build_decl (TYPE_DECL
, name
, t
);
2764 TYPE_NAME (TREE_TYPE (d
)) = d
;
2765 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2766 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2767 DECL_ARTIFICIAL (d
) = 1;
2769 /* Store it in the hash table. */
2772 /* TYPENAME_TYPEs must always be compared structurally, because
2773 they may or may not resolve down to another type depending on
2774 the currently open classes. */
2775 SET_TYPE_STRUCTURAL_EQUALITY (t
);
2781 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2782 provided to name the type. Returns an appropriate type, unless an
2783 error occurs, in which case error_mark_node is returned. If we
2784 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2785 return that, rather than the _TYPE it corresponds to, in other
2786 cases we look through the type decl. If TF_ERROR is set, complain
2787 about errors, otherwise be quiet. */
2790 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
2791 tsubst_flags_t complain
)
2797 if (name
== error_mark_node
2798 || context
== NULL_TREE
2799 || context
== error_mark_node
)
2800 return error_mark_node
;
2804 if (!(TYPE_LANG_SPECIFIC (name
)
2805 && (CLASSTYPE_IS_TEMPLATE (name
)
2806 || CLASSTYPE_USE_TEMPLATE (name
))))
2807 name
= TYPE_IDENTIFIER (name
);
2809 /* Create a TEMPLATE_ID_EXPR for the type. */
2810 name
= build_nt (TEMPLATE_ID_EXPR
,
2811 CLASSTYPE_TI_TEMPLATE (name
),
2812 CLASSTYPE_TI_ARGS (name
));
2814 else if (TREE_CODE (name
) == TYPE_DECL
)
2815 name
= DECL_NAME (name
);
2819 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
2821 name
= TREE_OPERAND (name
, 0);
2822 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2823 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
2824 else if (TREE_CODE (name
) == OVERLOAD
)
2826 error ("%qD is not a type", name
);
2827 return error_mark_node
;
2830 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2832 error ("%qD used without template parameters", name
);
2833 return error_mark_node
;
2835 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
2836 gcc_assert (TYPE_P (context
));
2838 /* When the CONTEXT is a dependent type, NAME could refer to a
2839 dependent base class of CONTEXT. So we cannot peek inside it,
2840 even if CONTEXT is a currently open scope. */
2841 if (dependent_type_p (context
))
2842 return build_typename_type (context
, name
, fullname
, tag_type
);
2844 if (!IS_AGGR_TYPE (context
))
2846 if (complain
& tf_error
)
2847 error ("%q#T is not a class", context
);
2848 return error_mark_node
;
2851 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
2853 /* We should only set WANT_TYPE when we're a nested typename type.
2854 Then we can give better diagnostics if we find a non-type. */
2855 t
= lookup_field (context
, name
, 0, /*want_type=*/true);
2858 if (complain
& tf_error
)
2859 error (want_template
? "no class template named %q#T in %q#T"
2860 : "no type named %q#T in %q#T", name
, context
);
2861 return error_mark_node
;
2864 if (want_template
&& !DECL_CLASS_TEMPLATE_P (t
))
2866 if (complain
& tf_error
)
2867 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2869 return error_mark_node
;
2871 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
2873 if (complain
& tf_error
)
2874 error ("%<typename %T::%D%> names %q#T, which is not a type",
2876 return error_mark_node
;
2879 if (complain
& tf_error
)
2880 perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
);
2883 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
2885 /*entering_scope=*/0,
2886 tf_warning_or_error
| tf_user
);
2888 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
2894 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2895 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2896 in which case error_mark_node is returned.
2898 If PARM_LIST is non-NULL, also make sure that the template parameter
2899 list of TEMPLATE_DECL matches.
2901 If COMPLAIN zero, don't complain about any errors that occur. */
2904 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
2905 tsubst_flags_t complain
)
2911 name
= TYPE_IDENTIFIER (name
);
2912 else if (DECL_P (name
))
2913 name
= DECL_NAME (name
);
2914 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
2916 if (!dependent_type_p (context
)
2917 || currently_open_class (context
))
2919 tree tmpl
= NULL_TREE
;
2921 if (IS_AGGR_TYPE (context
))
2922 tmpl
= lookup_field (context
, name
, 0, false);
2924 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
2926 if (complain
& tf_error
)
2927 error ("no class template named %q#T in %q#T", name
, context
);
2928 return error_mark_node
;
2932 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
2934 if (complain
& tf_error
)
2936 error ("template parameters do not match template");
2937 error ("%q+D declared here", tmpl
);
2939 return error_mark_node
;
2942 if (complain
& tf_error
)
2943 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
);
2948 /* Build the UNBOUND_CLASS_TEMPLATE. */
2949 t
= make_aggr_type (UNBOUND_CLASS_TEMPLATE
);
2950 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
2951 TREE_TYPE (t
) = NULL_TREE
;
2952 SET_TYPE_STRUCTURAL_EQUALITY (t
);
2954 /* Build the corresponding TEMPLATE_DECL. */
2955 d
= build_decl (TEMPLATE_DECL
, name
, t
);
2956 TYPE_NAME (TREE_TYPE (d
)) = d
;
2957 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2958 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2959 DECL_ARTIFICIAL (d
) = 1;
2960 DECL_TEMPLATE_PARMS (d
) = parm_list
;
2967 /* Push the declarations of builtin types into the namespace.
2968 RID_INDEX is the index of the builtin type in the array
2969 RID_POINTERS. NAME is the name used when looking up the builtin
2970 type. TYPE is the _TYPE node for the builtin type. */
2973 record_builtin_type (enum rid rid_index
,
2977 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
2978 tree tdecl
= NULL_TREE
;
2980 if ((int) rid_index
< (int) RID_MAX
)
2981 rname
= ridpointers
[(int) rid_index
];
2983 tname
= get_identifier (name
);
2985 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2986 eliminated. Built-in types should not be looked up name; their
2987 names are keywords that the parser can recognize. However, there
2988 is code in c-common.c that uses identifier_global_value to look
2989 up built-in types by name. */
2992 tdecl
= build_decl (TYPE_DECL
, tname
, type
);
2993 DECL_ARTIFICIAL (tdecl
) = 1;
2994 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3000 tdecl
= build_decl (TYPE_DECL
, rname
, type
);
3001 DECL_ARTIFICIAL (tdecl
) = 1;
3003 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3006 if (!TYPE_NAME (type
))
3007 TYPE_NAME (type
) = tdecl
;
3010 debug_hooks
->type_decl (tdecl
, 0);
3013 /* Record one of the standard Java types.
3014 * Declare it as having the given NAME.
3015 * If SIZE > 0, it is the size of one of the integral types;
3016 * otherwise it is the negative of the size of one of the other types. */
3019 record_builtin_java_type (const char* name
, int size
)
3023 type
= make_signed_type (size
);
3024 else if (size
> -32)
3025 { /* "__java_char" or ""__java_boolean". */
3026 type
= make_unsigned_type (-size
);
3027 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3030 { /* "__java_float" or ""__java_double". */
3031 type
= make_node (REAL_TYPE
);
3032 TYPE_PRECISION (type
) = - size
;
3035 record_builtin_type (RID_MAX
, name
, type
);
3036 decl
= TYPE_NAME (type
);
3038 /* Suppress generate debug symbol entries for these types,
3039 since for normal C++ they are just clutter.
3040 However, push_lang_context undoes this if extern "Java" is seen. */
3041 DECL_IGNORED_P (decl
) = 1;
3043 TYPE_FOR_JAVA (type
) = 1;
3047 /* Push a type into the namespace so that the back ends ignore it. */
3050 record_unknown_type (tree type
, const char* name
)
3052 tree decl
= pushdecl (build_decl (TYPE_DECL
, get_identifier (name
), type
));
3053 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3054 DECL_IGNORED_P (decl
) = 1;
3055 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3056 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3057 TYPE_ALIGN (type
) = 1;
3058 TYPE_USER_ALIGN (type
) = 0;
3059 TYPE_MODE (type
) = TYPE_MODE (void_type_node
);
3062 /* A string for which we should create an IDENTIFIER_NODE at
3065 typedef struct predefined_identifier
3067 /* The name of the identifier. */
3068 const char *const name
;
3069 /* The place where the IDENTIFIER_NODE should be stored. */
3071 /* Nonzero if this is the name of a constructor or destructor. */
3072 const int ctor_or_dtor_p
;
3073 } predefined_identifier
;
3075 /* Create all the predefined identifiers. */
3078 initialize_predefined_identifiers (void)
3080 const predefined_identifier
*pid
;
3082 /* A table of identifiers to create at startup. */
3083 static const predefined_identifier predefined_identifiers
[] = {
3084 { "C++", &lang_name_cplusplus
, 0 },
3085 { "C", &lang_name_c
, 0 },
3086 { "Java", &lang_name_java
, 0 },
3087 /* Some of these names have a trailing space so that it is
3088 impossible for them to conflict with names written by users. */
3089 { "__ct ", &ctor_identifier
, 1 },
3090 { "__base_ctor ", &base_ctor_identifier
, 1 },
3091 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3092 { "__dt ", &dtor_identifier
, 1 },
3093 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3094 { "__base_dtor ", &base_dtor_identifier
, 1 },
3095 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3096 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3097 { "nelts", &nelts_identifier
, 0 },
3098 { THIS_NAME
, &this_identifier
, 0 },
3099 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3100 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3101 { "_vptr", &vptr_identifier
, 0 },
3102 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3103 { "::", &global_scope_name
, 0 },
3104 { "std", &std_identifier
, 0 },
3108 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3110 *pid
->node
= get_identifier (pid
->name
);
3111 if (pid
->ctor_or_dtor_p
)
3112 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3116 /* Create the predefined scalar types of C,
3117 and some nodes representing standard constants (0, 1, (void *)0).
3118 Initialize the global binding level.
3119 Make definitions for built-in primitive functions. */
3122 cxx_init_decl_processing (void)
3125 tree void_ftype_ptr
;
3127 build_common_tree_nodes (flag_signed_char
, false);
3129 /* Create all the identifiers we need. */
3130 initialize_predefined_identifiers ();
3132 /* Create the global variables. */
3133 push_to_top_level ();
3135 current_function_decl
= NULL_TREE
;
3136 current_binding_level
= NULL
;
3137 /* Enter the global namespace. */
3138 gcc_assert (global_namespace
== NULL_TREE
);
3139 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3141 TREE_PUBLIC (global_namespace
) = 1;
3142 begin_scope (sk_namespace
, global_namespace
);
3144 current_lang_name
= NULL_TREE
;
3146 /* Adjust various flags based on command-line settings. */
3147 if (!flag_permissive
)
3148 flag_pedantic_errors
= 1;
3149 if (!flag_no_inline
)
3151 flag_inline_trees
= 1;
3154 if (flag_inline_functions
)
3155 flag_inline_trees
= 2;
3157 /* Force minimum function alignment if using the least significant
3158 bit of function pointers to store the virtual bit. */
3159 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
3160 && force_align_functions_log
< 1)
3161 force_align_functions_log
= 1;
3164 current_lang_name
= lang_name_c
;
3166 /* Create the `std' namespace. */
3167 push_namespace (std_identifier
);
3168 std_node
= current_namespace
;
3171 c_common_nodes_and_builtins ();
3173 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3174 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3175 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3176 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3177 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3178 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3179 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3180 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3182 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3183 integer_three_node
= build_int_cst (NULL_TREE
, 3);
3185 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3186 truthvalue_type_node
= boolean_type_node
;
3187 truthvalue_false_node
= boolean_false_node
;
3188 truthvalue_true_node
= boolean_true_node
;
3190 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3193 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3196 delta_type_node
= ptrdiff_type_node
;
3197 vtable_index_type
= ptrdiff_type_node
;
3199 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3200 void_ftype
= build_function_type (void_type_node
, void_list_node
);
3201 void_ftype_ptr
= build_function_type (void_type_node
,
3202 tree_cons (NULL_TREE
,
3206 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3208 /* C++ extensions */
3210 unknown_type_node
= make_node (UNKNOWN_TYPE
);
3211 record_unknown_type (unknown_type_node
, "unknown type");
3213 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3214 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3216 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3218 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3219 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3222 /* Make sure we get a unique function type, so we can give
3223 its pointer type a name. (This wins for gdb.) */
3224 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3225 TREE_TYPE (vfunc_type
) = integer_type_node
;
3226 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3227 layout_type (vfunc_type
);
3229 vtable_entry_type
= build_pointer_type (vfunc_type
);
3231 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3234 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3235 layout_type (vtbl_type_node
);
3236 vtbl_type_node
= build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3237 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3238 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3239 layout_type (vtbl_ptr_type_node
);
3240 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3242 push_namespace (get_identifier ("__cxxabiv1"));
3243 abi_node
= current_namespace
;
3246 global_type_node
= make_node (LANG_TYPE
);
3247 record_unknown_type (global_type_node
, "global type");
3250 current_lang_name
= lang_name_cplusplus
;
3254 tree bad_alloc_type_node
;
3255 tree bad_alloc_decl
;
3256 tree newtype
, deltype
;
3257 tree ptr_ftype_sizetype
;
3259 push_namespace (std_identifier
);
3260 bad_alloc_id
= get_identifier ("bad_alloc");
3261 bad_alloc_type_node
= make_aggr_type (RECORD_TYPE
);
3262 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3264 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3265 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3266 TYPE_STUB_DECL (bad_alloc_type_node
) = bad_alloc_decl
;
3270 = build_function_type (ptr_type_node
,
3271 tree_cons (NULL_TREE
,
3274 newtype
= build_exception_variant
3275 (ptr_ftype_sizetype
, add_exception_specifier
3276 (NULL_TREE
, bad_alloc_type_node
, -1));
3277 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3278 push_cp_library_fn (NEW_EXPR
, newtype
);
3279 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3280 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3281 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3285 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3287 /* Perform other language dependent initializations. */
3288 init_class_processing ();
3289 init_rtti_processing ();
3291 if (flag_exceptions
)
3292 init_exception_processing ();
3294 if (! supports_one_only ())
3297 make_fname_decl
= cp_make_fname_decl
;
3298 start_fname_decls ();
3300 /* Show we use EH for cleanups. */
3301 if (flag_exceptions
)
3302 using_eh_for_cleanups ();
3305 /* Generate an initializer for a function naming variable from
3306 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3307 filled in with the type of the init. */
3310 cp_fname_init (const char* name
, tree
*type_p
)
3312 tree domain
= NULL_TREE
;
3314 tree init
= NULL_TREE
;
3319 length
= strlen (name
);
3320 domain
= build_index_type (size_int (length
));
3321 init
= build_string (length
+ 1, name
);
3324 type
= build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3325 type
= build_cplus_array_type (type
, domain
);
3330 TREE_TYPE (init
) = type
;
3332 init
= error_mark_node
;
3337 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3338 decl, NAME is the initialization string and TYPE_DEP indicates whether
3339 NAME depended on the type of the function. We make use of that to detect
3340 __PRETTY_FUNCTION__ inside a template fn. This is being done
3341 lazily at the point of first use, so we mustn't push the decl now. */
3344 cp_make_fname_decl (tree id
, int type_dep
)
3346 const char *const name
= (type_dep
&& processing_template_decl
3347 ? NULL
: fname_as_string (type_dep
));
3349 tree init
= cp_fname_init (name
, &type
);
3350 tree decl
= build_decl (VAR_DECL
, id
, type
);
3353 free ((char *) name
);
3355 /* As we're using pushdecl_with_scope, we must set the context. */
3356 DECL_CONTEXT (decl
) = current_function_decl
;
3357 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3359 TREE_STATIC (decl
) = 1;
3360 TREE_READONLY (decl
) = 1;
3361 DECL_ARTIFICIAL (decl
) = 1;
3363 TREE_USED (decl
) = 1;
3365 if (current_function_decl
)
3367 struct cp_binding_level
*b
= current_binding_level
;
3368 while (b
->level_chain
->kind
!= sk_function_parms
)
3370 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3371 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3372 LOOKUP_ONLYCONVERTING
);
3375 pushdecl_top_level_and_finish (decl
, init
);
3381 builtin_function_1 (tree decl
, tree context
)
3383 tree id
= DECL_NAME (decl
);
3384 const char *name
= IDENTIFIER_POINTER (id
);
3386 retrofit_lang_decl (decl
);
3388 /* All nesting of C++ functions is lexical; there is never a "static
3389 chain" in the sense of GNU C nested functions. */
3390 DECL_NO_STATIC_CHAIN (decl
) = 1;
3392 DECL_ARTIFICIAL (decl
) = 1;
3393 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3394 SET_DECL_LANGUAGE (decl
, lang_c
);
3395 /* Runtime library routines are, by definition, available in an
3396 external shared object. */
3397 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3398 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3400 DECL_CONTEXT (decl
) = context
;
3404 /* A function in the user's namespace should have an explicit
3405 declaration before it is used. Mark the built-in function as
3406 anticipated but not actually declared. */
3407 if (name
[0] != '_' || name
[1] != '_')
3408 DECL_ANTICIPATED (decl
) = 1;
3414 cxx_builtin_function (tree decl
)
3416 tree id
= DECL_NAME (decl
);
3417 const char *name
= IDENTIFIER_POINTER (id
);
3418 /* All builtins that don't begin with an '_' should additionally
3419 go in the 'std' namespace. */
3422 tree decl2
= copy_node(decl
);
3423 push_namespace (std_identifier
);
3424 builtin_function_1 (decl2
, std_node
);
3428 return builtin_function_1 (decl
, NULL_TREE
);
3431 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3432 function. Not called directly. */
3435 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3437 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3438 DECL_EXTERNAL (fn
) = 1;
3439 TREE_PUBLIC (fn
) = 1;
3440 DECL_ARTIFICIAL (fn
) = 1;
3441 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3442 SET_DECL_LANGUAGE (fn
, lang_c
);
3443 /* Runtime library routines are, by definition, available in an
3444 external shared object. */
3445 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3446 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3450 /* Returns the _DECL for a library function with C linkage.
3451 We assume that such functions never throw; if this is incorrect,
3452 callers should unset TREE_NOTHROW. */
3455 build_library_fn (tree name
, tree type
)
3457 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
3458 TREE_NOTHROW (fn
) = 1;
3462 /* Returns the _DECL for a library function with C++ linkage. */
3465 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3467 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3468 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3469 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3470 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3474 /* Like build_library_fn, but takes a C string instead of an
3478 build_library_fn_ptr (const char* name
, tree type
)
3480 return build_library_fn (get_identifier (name
), type
);
3483 /* Like build_cp_library_fn, but takes a C string instead of an
3487 build_cp_library_fn_ptr (const char* name
, tree type
)
3489 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3492 /* Like build_library_fn, but also pushes the function so that we will
3493 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3496 push_library_fn (tree name
, tree type
)
3498 tree fn
= build_library_fn (name
, type
);
3499 pushdecl_top_level (fn
);
3503 /* Like build_cp_library_fn, but also pushes the function so that it
3504 will be found by normal lookup. */
3507 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3509 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3516 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3520 push_void_library_fn (tree name
, tree parmtypes
)
3522 tree type
= build_function_type (void_type_node
, parmtypes
);
3523 return push_library_fn (name
, type
);
3526 /* Like push_library_fn, but also note that this function throws
3527 and does not return. Used for __throw_foo and the like. */
3530 push_throw_library_fn (tree name
, tree type
)
3532 tree fn
= push_library_fn (name
, type
);
3533 TREE_THIS_VOLATILE (fn
) = 1;
3534 TREE_NOTHROW (fn
) = 0;
3538 /* When we call finish_struct for an anonymous union, we create
3539 default copy constructors and such. But, an anonymous union
3540 shouldn't have such things; this function undoes the damage to the
3541 anonymous union type T.
3543 (The reason that we create the synthesized methods is that we don't
3544 distinguish `union { int i; }' from `typedef union { int i; } U'.
3545 The first is an anonymous union; the second is just an ordinary
3549 fixup_anonymous_aggr (tree t
)
3553 /* Wipe out memory of synthesized methods. */
3554 TYPE_HAS_CONSTRUCTOR (t
) = 0;
3555 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3556 TYPE_HAS_INIT_REF (t
) = 0;
3557 TYPE_HAS_CONST_INIT_REF (t
) = 0;
3558 TYPE_HAS_ASSIGN_REF (t
) = 0;
3559 TYPE_HAS_CONST_ASSIGN_REF (t
) = 0;
3561 /* Splice the implicitly generated functions out of the TYPE_METHODS
3563 q
= &TYPE_METHODS (t
);
3566 if (DECL_ARTIFICIAL (*q
))
3567 *q
= TREE_CHAIN (*q
);
3569 q
= &TREE_CHAIN (*q
);
3572 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3573 if (TYPE_METHODS (t
))
3574 error ("%Jan anonymous union cannot have function members",
3575 TYPE_MAIN_DECL (t
));
3577 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3578 assignment operators (because they cannot have these methods themselves).
3579 For anonymous unions this is already checked because they are not allowed
3580 in any union, otherwise we have to check it. */
3581 if (TREE_CODE (t
) != UNION_TYPE
)
3585 for (field
= TYPE_FIELDS (t
); field
; field
= TREE_CHAIN (field
))
3586 if (TREE_CODE (field
) == FIELD_DECL
)
3588 type
= TREE_TYPE (field
);
3589 if (CLASS_TYPE_P (type
))
3591 if (TYPE_NEEDS_CONSTRUCTING (type
))
3592 error ("member %q+#D with constructor not allowed "
3593 "in anonymous aggregate", field
);
3594 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
3595 error ("member %q+#D with destructor not allowed "
3596 "in anonymous aggregate", field
);
3597 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type
))
3598 error ("member %q+#D with copy assignment operator "
3599 "not allowed in anonymous aggregate", field
);
3605 /* Make sure that a declaration with no declarator is well-formed, i.e.
3606 just declares a tagged type or anonymous union.
3608 Returns the type declared; or NULL_TREE if none. */
3611 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
3613 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
3614 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
3615 /* If a class, struct, or enum type is declared by the DECLSPECS
3616 (i.e, if a class-specifier, enum-specifier, or non-typename
3617 elaborated-type-specifier appears in the DECLSPECS),
3618 DECLARED_TYPE is set to the corresponding type. */
3619 tree declared_type
= NULL_TREE
;
3620 bool error_p
= false;
3622 if (declspecs
->multiple_types_p
)
3623 error ("multiple types in one declaration");
3624 else if (declspecs
->redefined_builtin_type
)
3626 if (!in_system_header
)
3627 pedwarn ("redeclaration of C++ built-in type %qT",
3628 declspecs
->redefined_builtin_type
);
3633 && TYPE_P (declspecs
->type
)
3634 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
3635 && IS_AGGR_TYPE (declspecs
->type
))
3636 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
3637 declared_type
= declspecs
->type
;
3638 else if (declspecs
->type
== error_mark_node
)
3640 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
3641 pedwarn ("declaration does not declare anything");
3642 /* Check for an anonymous union. */
3643 else if (declared_type
&& IS_AGGR_TYPE_CODE (TREE_CODE (declared_type
))
3644 && TYPE_ANONYMOUS_P (declared_type
))
3646 /* 7/3 In a simple-declaration, the optional init-declarator-list
3647 can be omitted only when declaring a class (clause 9) or
3648 enumeration (7.2), that is, when the decl-specifier-seq contains
3649 either a class-specifier, an elaborated-type-specifier with
3650 a class-key (9.1), or an enum-specifier. In these cases and
3651 whenever a class-specifier or enum-specifier is present in the
3652 decl-specifier-seq, the identifiers in these specifiers are among
3653 the names being declared by the declaration (as class-name,
3654 enum-names, or enumerators, depending on the syntax). In such
3655 cases, and except for the declaration of an unnamed bit-field (9.6),
3656 the decl-specifier-seq shall introduce one or more names into the
3657 program, or shall redeclare a name introduced by a previous
3658 declaration. [Example:
3659 enum { }; // ill-formed
3660 typedef class { }; // ill-formed
3664 error ("missing type-name in typedef-declaration");
3667 /* Anonymous unions are objects, so they can have specifiers. */;
3668 SET_ANON_AGGR_TYPE_P (declared_type
);
3670 if (TREE_CODE (declared_type
) != UNION_TYPE
&& pedantic
3671 && !in_system_header
)
3672 pedwarn ("ISO C++ prohibits anonymous structs");
3677 if (declspecs
->specs
[(int)ds_inline
]
3678 || declspecs
->specs
[(int)ds_virtual
])
3679 error ("%qs can only be specified for functions",
3680 declspecs
->specs
[(int)ds_inline
]
3681 ? "inline" : "virtual");
3683 && (!current_class_type
3684 || current_scope () != current_class_type
))
3685 error ("%<friend%> can only be specified inside a class");
3686 else if (declspecs
->specs
[(int)ds_explicit
])
3687 error ("%<explicit%> can only be specified for constructors");
3688 else if (declspecs
->storage_class
)
3689 error ("a storage class can only be specified for objects "
3691 else if (declspecs
->specs
[(int)ds_const
]
3692 || declspecs
->specs
[(int)ds_volatile
]
3693 || declspecs
->specs
[(int)ds_restrict
]
3694 || declspecs
->specs
[(int)ds_thread
])
3695 error ("qualifiers can only be specified for objects "
3699 return declared_type
;
3702 /* Called when a declaration is seen that contains no names to declare.
3703 If its type is a reference to a structure, union or enum inherited
3704 from a containing scope, shadow that tag name for the current scope
3705 with a forward reference.
3706 If its type defines a new named structure or union
3707 or defines an enum, it is valid but we need not do anything here.
3708 Otherwise, it is an error.
3710 C++: may have to grok the declspecs to learn about static,
3711 complain for anonymous unions.
3713 Returns the TYPE declared -- or NULL_TREE if none. */
3716 shadow_tag (cp_decl_specifier_seq
*declspecs
)
3718 tree t
= check_tag_decl (declspecs
);
3723 if (declspecs
->attributes
)
3725 warning (0, "attribute ignored in declaration of %q+#T", t
);
3726 warning (0, "attribute for %q+#T must follow the %qs keyword",
3727 t
, class_key_or_enum_as_string (t
));
3731 if (maybe_process_partial_specialization (t
) == error_mark_node
)
3734 /* This is where the variables in an anonymous union are
3735 declared. An anonymous union declaration looks like:
3737 because there is no declarator after the union, the parser
3738 sends that declaration here. */
3739 if (ANON_AGGR_TYPE_P (t
))
3741 fixup_anonymous_aggr (t
);
3743 if (TYPE_FIELDS (t
))
3745 tree decl
= grokdeclarator (/*declarator=*/NULL
,
3746 declspecs
, NORMAL
, 0, NULL
);
3747 finish_anon_union (decl
);
3754 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3757 groktypename (cp_decl_specifier_seq
*type_specifiers
,
3758 const cp_declarator
*declarator
)
3762 attrs
= type_specifiers
->attributes
;
3763 type_specifiers
->attributes
= NULL_TREE
;
3764 type
= grokdeclarator (declarator
, type_specifiers
, TYPENAME
, 0, &attrs
);
3766 cplus_decl_attributes (&type
, attrs
, 0);
3770 /* Decode a declarator in an ordinary declaration or data definition.
3771 This is called as soon as the type information and variable name
3772 have been parsed, before parsing the initializer if any.
3773 Here we create the ..._DECL node, fill in its type,
3774 and put it on the list of decls for the current context.
3775 The ..._DECL node is returned as the value.
3777 Exception: for arrays where the length is not specified,
3778 the type is left null, to be filled in by `cp_finish_decl'.
3780 Function definitions do not come here; they go to start_function
3781 instead. However, external and forward declarations of functions
3782 do go through here. Structure field declarations are done by
3783 grokfield and not through here. */
3786 start_decl (const cp_declarator
*declarator
,
3787 cp_decl_specifier_seq
*declspecs
,
3790 tree prefix_attributes
,
3791 tree
*pushed_scope_p
)
3797 *pushed_scope_p
= NULL_TREE
;
3799 /* An object declared as __attribute__((deprecated)) suppresses
3800 warnings of uses of other deprecated items. */
3801 if (lookup_attribute ("deprecated", attributes
))
3802 deprecated_state
= DEPRECATED_SUPPRESS
;
3804 attributes
= chainon (attributes
, prefix_attributes
);
3806 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
3809 deprecated_state
= DEPRECATED_NORMAL
;
3811 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
3812 || decl
== error_mark_node
)
3813 return error_mark_node
;
3815 type
= TREE_TYPE (decl
);
3817 context
= DECL_CONTEXT (decl
);
3821 *pushed_scope_p
= push_scope (context
);
3823 /* We are only interested in class contexts, later. */
3824 if (TREE_CODE (context
) == NAMESPACE_DECL
)
3825 context
= NULL_TREE
;
3829 /* Is it valid for this decl to have an initializer at all?
3830 If not, set INITIALIZED to zero, which will indirectly
3831 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3832 switch (TREE_CODE (decl
))
3835 error ("typedef %qD is initialized (use __typeof__ instead)", decl
);
3836 return error_mark_node
;
3839 error ("function %q#D is initialized like a variable", decl
);
3840 return error_mark_node
;
3848 if (! toplevel_bindings_p ()
3849 && DECL_EXTERNAL (decl
))
3850 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3852 DECL_EXTERNAL (decl
) = 0;
3853 if (toplevel_bindings_p ())
3854 TREE_STATIC (decl
) = 1;
3857 /* Set attributes here so if duplicate decl, will have proper attributes. */
3858 cplus_decl_attributes (&decl
, attributes
, 0);
3860 /* Dllimported symbols cannot be defined. Static data members (which
3861 can be initialized in-class and dllimported) go through grokfield,
3862 not here, so we don't need to exclude those decls when checking for
3864 if (initialized
&& DECL_DLLIMPORT_P (decl
))
3866 error ("definition of %q#D is marked %<dllimport%>", decl
);
3867 DECL_DLLIMPORT_P (decl
) = 0;
3870 /* If #pragma weak was used, mark the decl weak now. */
3871 maybe_apply_pragma_weak (decl
);
3873 if (TREE_CODE (decl
) == FUNCTION_DECL
3874 && DECL_DECLARED_INLINE_P (decl
)
3875 && DECL_UNINLINABLE (decl
)
3876 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
3877 warning (0, "inline function %q+D given attribute noinline", decl
);
3879 if (context
&& COMPLETE_TYPE_P (complete_type (context
)))
3881 if (TREE_CODE (decl
) == VAR_DECL
)
3883 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
3884 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
3885 error ("%q#D is not a static member of %q#T", decl
, context
);
3888 if (DECL_CONTEXT (field
) != context
)
3890 if (!same_type_p (DECL_CONTEXT (field
), context
))
3891 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3892 "to be defined as %<%T::%D%>",
3893 DECL_CONTEXT (field
), DECL_NAME (decl
),
3894 context
, DECL_NAME (decl
));
3895 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
3897 if (processing_specialization
3898 && template_class_depth (context
) == 0
3899 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
3900 error ("template header not allowed in member definition "
3901 "of explicitly specialized class");
3902 /* Static data member are tricky; an in-class initialization
3903 still doesn't provide a definition, so the in-class
3904 declaration will have DECL_EXTERNAL set, but will have an
3905 initialization. Thus, duplicate_decls won't warn
3906 about this situation, and so we check here. */
3907 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
3908 error ("duplicate initialization of %qD", decl
);
3909 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
3915 tree field
= check_classfn (context
, decl
,
3916 (processing_template_decl
3917 > template_class_depth (context
))
3918 ? current_template_parms
3920 if (field
&& duplicate_decls (decl
, field
,
3921 /*newdecl_is_friend=*/false))
3925 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3926 DECL_IN_AGGR_P (decl
) = 0;
3927 /* Do not mark DECL as an explicit specialization if it was not
3928 already marked as an instantiation; a declaration should
3929 never be marked as a specialization unless we know what
3930 template is being specialized. */
3931 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
3933 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
3935 /* [temp.expl.spec] An explicit specialization of a static data
3936 member of a template is a definition if the declaration
3937 includes an initializer; otherwise, it is a declaration.
3939 We check for processing_specialization so this only applies
3940 to the new specialization syntax. */
3941 if (!initialized
&& processing_specialization
)
3942 DECL_EXTERNAL (decl
) = 1;
3945 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
))
3946 pedwarn ("declaration of %q#D outside of class is not definition",
3950 /* Enter this declaration into the symbol table. */
3951 tem
= maybe_push_decl (decl
);
3953 if (processing_template_decl
)
3954 tem
= push_template_decl (tem
);
3955 if (tem
== error_mark_node
)
3956 return error_mark_node
;
3958 /* Tell the back end to use or not use .common as appropriate. If we say
3959 -fconserve-space, we want this to save .data space, at the expense of
3960 wrong semantics. If we say -fno-conserve-space, we want this to
3961 produce errors about redefs; to do this we force variables into the
3963 if (flag_conserve_space
3964 && TREE_CODE (tem
) == VAR_DECL
3965 && TREE_PUBLIC (tem
)
3966 && !DECL_THREAD_LOCAL_P (tem
)
3967 && !have_global_bss_p ())
3968 DECL_COMMON (tem
) = 1;
3970 if (!processing_template_decl
&& TREE_CODE (tem
) == VAR_DECL
)
3971 start_decl_1 (tem
, initialized
);
3977 start_decl_1 (tree decl
, bool initialized
)
3981 gcc_assert (!processing_template_decl
);
3983 if (error_operand_p (decl
))
3986 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
3987 type
= TREE_TYPE (decl
);
3990 /* Is it valid for this decl to have an initializer at all?
3991 If not, set INITIALIZED to zero, which will indirectly
3992 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3994 /* Don't allow initializations for incomplete types except for
3995 arrays which might be completed by the initialization. */
3996 if (COMPLETE_TYPE_P (complete_type (type
)))
3997 ; /* A complete type is ok. */
3998 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4000 error ("variable %q#D has initializer but incomplete type", decl
);
4002 type
= TREE_TYPE (decl
) = error_mark_node
;
4004 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4006 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4007 error ("elements of array %q#D have incomplete type", decl
);
4008 /* else we already gave an error in start_decl. */
4012 else if (IS_AGGR_TYPE (type
)
4013 && ! DECL_EXTERNAL (decl
))
4015 if (!COMPLETE_TYPE_P (complete_type (type
)))
4017 error ("aggregate %q#D has incomplete type and cannot be defined",
4019 /* Change the type so that assemble_variable will give
4020 DECL an rtl we can live with: (mem (const_int 0)). */
4021 type
= TREE_TYPE (decl
) = error_mark_node
;
4025 /* If any base type in the hierarchy of TYPE needs a constructor,
4026 then we set initialized to 1. This way any nodes which are
4027 created for the purposes of initializing this aggregate
4028 will live as long as it does. This is necessary for global
4029 aggregates which do not have their initializers processed until
4030 the end of the file. */
4031 initialized
= TYPE_NEEDS_CONSTRUCTING (type
);
4035 /* Create a new scope to hold this declaration if necessary.
4036 Whether or not a new scope is necessary cannot be determined
4037 until after the type has been completed; if the type is a
4038 specialization of a class template it is not until after
4039 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4040 will be set correctly. */
4041 maybe_push_cleanup_level (type
);
4044 /* Handle initialization of references. DECL, TYPE, and INIT have the
4045 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4046 but will be set to a new CLEANUP_STMT if a temporary is created
4047 that must be destroyed subsequently.
4049 Returns an initializer expression to use to initialize DECL, or
4050 NULL if the initialization can be performed statically.
4052 Quotes on semantics can be found in ARM 8.4.3. */
4055 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
4059 if (init
== NULL_TREE
)
4061 if ((DECL_LANG_SPECIFIC (decl
) == 0
4062 || DECL_IN_AGGR_P (decl
) == 0)
4063 && ! DECL_THIS_EXTERN (decl
))
4064 error ("%qD declared as reference but not initialized", decl
);
4068 if (TREE_CODE (init
) == CONSTRUCTOR
)
4070 error ("ISO C++ forbids use of initializer list to "
4071 "initialize reference %qD", decl
);
4075 if (TREE_CODE (init
) == TREE_LIST
)
4076 init
= build_x_compound_expr_from_list (init
, "initializer");
4078 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4079 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4080 /* Note: default conversion is only called in very special cases. */
4081 init
= decay_conversion (init
);
4083 /* Convert INIT to the reference type TYPE. This may involve the
4084 creation of a temporary, whose lifetime must be the same as that
4085 of the reference. If so, a DECL_EXPR for the temporary will be
4086 added just after the DECL_EXPR for DECL. That's why we don't set
4087 DECL_INITIAL for local references (instead assigning to them
4088 explicitly); we need to allow the temporary to be initialized
4090 tmp
= initialize_reference (type
, init
, decl
, cleanup
);
4092 if (tmp
== error_mark_node
)
4094 else if (tmp
== NULL_TREE
)
4096 error ("cannot initialize %qT from %qT", type
, TREE_TYPE (init
));
4100 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
4103 DECL_INITIAL (decl
) = tmp
;
4108 /* Designated initializers in arrays are not supported in GNU C++.
4109 The parser cannot detect this error since it does not know whether
4110 a given brace-enclosed initializer is for a class type or for an
4111 array. This function checks that CE does not use a designated
4112 initializer. If it does, an error is issued. Returns true if CE
4113 is valid, i.e., does not have a designated initializer. */
4116 check_array_designated_initializer (const constructor_elt
*ce
)
4118 /* Designated initializers for array elements are not supported. */
4121 /* The parser only allows identifiers as designated
4123 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4124 error ("name %qD used in a GNU-style designated "
4125 "initializer for an array", ce
->index
);
4132 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4133 array until we finish parsing the initializer. If that's the
4134 situation we're in, update DECL accordingly. */
4137 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4139 tree type
= TREE_TYPE (decl
);
4141 if (TREE_CODE (type
) == ARRAY_TYPE
4142 && TYPE_DOMAIN (type
) == NULL_TREE
4143 && TREE_CODE (decl
) != TYPE_DECL
)
4145 /* do_default is really a C-ism to deal with tentative definitions.
4146 But let's leave it here to ease the eventual merge. */
4147 int do_default
= !DECL_EXTERNAL (decl
);
4148 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4151 /* Check that there are no designated initializers in INIT, as
4152 those are not supported in GNU C++, and as the middle-end
4153 will crash if presented with a non-numeric designated
4155 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4157 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4158 constructor_elt
*ce
;
4161 VEC_iterate (constructor_elt
, v
, i
, ce
);
4163 if (!check_array_designated_initializer (ce
))
4169 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4173 error ("initializer fails to determine size of %qD", decl
);
4174 TREE_TYPE (decl
) = error_mark_node
;
4176 else if (failure
== 2)
4180 error ("array size missing in %qD", decl
);
4181 TREE_TYPE (decl
) = error_mark_node
;
4183 /* If a `static' var's size isn't known, make it extern as
4184 well as static, so it does not get allocated. If it's not
4185 `static', then don't mark it extern; finish_incomplete_decl
4186 will give it a default size and it will get allocated. */
4187 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4188 DECL_EXTERNAL (decl
) = 1;
4190 else if (failure
== 3)
4192 error ("zero-size array %qD", decl
);
4193 TREE_TYPE (decl
) = error_mark_node
;
4197 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4199 layout_decl (decl
, 0);
4203 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4204 any appropriate error messages regarding the layout. */
4207 layout_var_decl (tree decl
)
4211 type
= TREE_TYPE (decl
);
4212 if (type
== error_mark_node
)
4215 /* If we haven't already layed out this declaration, do so now.
4216 Note that we must not call complete type for an external object
4217 because it's type might involve templates that we are not
4218 supposed to instantiate yet. (And it's perfectly valid to say
4219 `extern X x' for some incomplete type `X'.) */
4220 if (!DECL_EXTERNAL (decl
))
4221 complete_type (type
);
4222 if (!DECL_SIZE (decl
)
4223 && TREE_TYPE (decl
) != error_mark_node
4224 && (COMPLETE_TYPE_P (type
)
4225 || (TREE_CODE (type
) == ARRAY_TYPE
4226 && !TYPE_DOMAIN (type
)
4227 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4228 layout_decl (decl
, 0);
4230 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4232 /* An automatic variable with an incomplete type: that is an error.
4233 Don't talk about array types here, since we took care of that
4234 message in grokdeclarator. */
4235 error ("storage size of %qD isn't known", decl
);
4236 TREE_TYPE (decl
) = error_mark_node
;
4239 /* Keep this code around in case we later want to control debug info
4240 based on whether a type is "used". (jason 1999-11-11) */
4242 else if (!DECL_EXTERNAL (decl
) && IS_AGGR_TYPE (ttype
))
4243 /* Let debugger know it should output info for this type. */
4244 note_debug_info_needed (ttype
);
4246 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4247 note_debug_info_needed (DECL_CONTEXT (decl
));
4250 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4251 && DECL_SIZE (decl
) != NULL_TREE
4252 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4254 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4255 constant_expression_warning (DECL_SIZE (decl
));
4257 error ("storage size of %qD isn't constant", decl
);
4261 /* If a local static variable is declared in an inline function, or if
4262 we have a weak definition, we must endeavor to create only one
4263 instance of the variable at link-time. */
4266 maybe_commonize_var (tree decl
)
4268 /* Static data in a function with comdat linkage also has comdat
4270 if (TREE_STATIC (decl
)
4271 /* Don't mess with __FUNCTION__. */
4272 && ! DECL_ARTIFICIAL (decl
)
4273 && DECL_FUNCTION_SCOPE_P (decl
)
4274 /* Unfortunately, import_export_decl has not always been called
4275 before the function is processed, so we cannot simply check
4277 && (DECL_COMDAT (DECL_CONTEXT (decl
))
4278 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl
))
4279 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl
)))
4280 && TREE_PUBLIC (DECL_CONTEXT (decl
)))))
4284 /* With weak symbols, we simply make the variable COMDAT;
4285 that will cause copies in multiple translations units to
4287 comdat_linkage (decl
);
4291 if (DECL_INITIAL (decl
) == NULL_TREE
4292 || DECL_INITIAL (decl
) == error_mark_node
)
4294 /* Without weak symbols, we can use COMMON to merge
4295 uninitialized variables. */
4296 TREE_PUBLIC (decl
) = 1;
4297 DECL_COMMON (decl
) = 1;
4301 /* While for initialized variables, we must use internal
4302 linkage -- which means that multiple copies will not
4304 TREE_PUBLIC (decl
) = 0;
4305 DECL_COMMON (decl
) = 0;
4306 warning (0, "sorry: semantics of inline function static "
4307 "data %q+#D are wrong (you'll wind up "
4308 "with multiple copies)", decl
);
4309 warning (0, "%J you can work around this by removing "
4315 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4316 /* Set it up again; we might have set DECL_INITIAL since the last
4318 comdat_linkage (decl
);
4321 /* Issue an error message if DECL is an uninitialized const variable. */
4324 check_for_uninitialized_const_var (tree decl
)
4326 tree type
= TREE_TYPE (decl
);
4328 /* ``Unless explicitly declared extern, a const object does not have
4329 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4331 if (TREE_CODE (decl
) == VAR_DECL
4332 && TREE_CODE (type
) != REFERENCE_TYPE
4333 && CP_TYPE_CONST_P (type
)
4334 && !TYPE_NEEDS_CONSTRUCTING (type
)
4335 && !DECL_INITIAL (decl
))
4336 error ("uninitialized const %qD", decl
);
4340 /* Structure holding the current initializer being processed by reshape_init.
4341 CUR is a pointer to the current element being processed, END is a pointer
4342 after the last element present in the initializer. */
4343 typedef struct reshape_iterator_t
4345 constructor_elt
*cur
;
4346 constructor_elt
*end
;
4349 static tree
reshape_init_r (tree
, reshape_iter
*, bool);
4351 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4352 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4353 initialized. If there are no more such fields, the return value
4357 next_initializable_field (tree field
)
4360 && (TREE_CODE (field
) != FIELD_DECL
4361 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4362 || DECL_ARTIFICIAL (field
)))
4363 field
= TREE_CHAIN (field
);
4368 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4369 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4370 INTEGER_CST representing the size of the array minus one (the maximum index),
4371 or NULL_TREE if the array was declared without specifying the size. D is
4372 the iterator within the constructor. */
4375 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
)
4378 bool sized_array_p
= (max_index
!= NULL_TREE
);
4379 unsigned HOST_WIDE_INT max_index_cst
= 0;
4380 unsigned HOST_WIDE_INT index
;
4382 /* The initializer for an array is always a CONSTRUCTOR. */
4383 new_init
= build_constructor (NULL_TREE
, NULL
);
4387 /* Minus 1 is used for zero sized arrays. */
4388 if (integer_all_onesp (max_index
))
4391 if (host_integerp (max_index
, 1))
4392 max_index_cst
= tree_low_cst (max_index
, 1);
4393 /* sizetype is sign extended, not zero extended. */
4395 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
4399 /* Loop until there are no more initializers. */
4401 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
4406 check_array_designated_initializer (d
->cur
);
4407 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false);
4408 if (elt_init
== error_mark_node
)
4409 return error_mark_node
;
4410 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), NULL_TREE
, elt_init
);
4416 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4417 Parameters are the same of reshape_init_r. */
4420 reshape_init_array (tree type
, reshape_iter
*d
)
4422 tree max_index
= NULL_TREE
;
4424 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
4426 if (TYPE_DOMAIN (type
))
4427 max_index
= array_type_nelts (type
);
4429 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
);
4432 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4433 Parameters are the same of reshape_init_r. */
4436 reshape_init_vector (tree type
, reshape_iter
*d
)
4438 tree max_index
= NULL_TREE
;
4441 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
4443 if (COMPOUND_LITERAL_P (d
->cur
->value
))
4445 tree value
= d
->cur
->value
;
4446 if (!same_type_p (TREE_TYPE (value
), type
))
4448 error ("invalid type %qT as initializer for a vector of type %qT",
4449 TREE_TYPE (d
->cur
->value
), type
);
4450 value
= error_mark_node
;
4456 /* For a vector, the representation type is a struct
4457 containing a single member which is an array of the
4458 appropriate size. */
4459 rtype
= TYPE_DEBUG_REPRESENTATION_TYPE (type
);
4460 if (rtype
&& TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype
))))
4461 max_index
= array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype
)));
4463 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
);
4466 /* Subroutine of reshape_init_r, processes the initializers for classes
4467 or union. Parameters are the same of reshape_init_r. */
4470 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
)
4475 gcc_assert (CLASS_TYPE_P (type
));
4477 /* The initializer for a class is always a CONSTRUCTOR. */
4478 new_init
= build_constructor (NULL_TREE
, NULL
);
4479 field
= next_initializable_field (TYPE_FIELDS (type
));
4485 An initializer for an aggregate member that is an
4486 empty class shall have the form of an empty
4487 initializer-list {}. */
4488 if (!first_initializer_p
)
4490 error ("initializer for %qT must be brace-enclosed", type
);
4491 return error_mark_node
;
4496 /* Loop through the initializable fields, gathering initializers. */
4497 while (d
->cur
!= d
->end
)
4501 /* Handle designated initializers, as an extension. */
4504 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
4506 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
4508 error ("%qT has no non-static data member named %qD", type
,
4510 return error_mark_node
;
4514 /* If we processed all the member of the class, we are done. */
4518 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
4519 /*first_initializer_p=*/false);
4520 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
4524 When a union is initialized with a brace-enclosed
4525 initializer, the braces shall only contain an
4526 initializer for the first member of the union. */
4527 if (TREE_CODE (type
) == UNION_TYPE
)
4530 field
= next_initializable_field (TREE_CHAIN (field
));
4536 /* Subroutine of reshape_init, which processes a single initializer (part of
4537 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4538 iterator within the CONSTRUCTOR which points to the initializer to process.
4539 FIRST_INITIALIZER_P is true if this is the first initializer of the
4540 CONSTRUCTOR node. */
4543 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
)
4545 tree init
= d
->cur
->value
;
4547 /* A non-aggregate type is always initialized with a single
4549 if (!CP_AGGREGATE_TYPE_P (type
))
4551 /* It is invalid to initialize a non-aggregate type with a
4552 brace-enclosed initializer.
4553 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4554 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4555 a CONSTRUCTOR (with a record type). */
4556 if (TREE_CODE (init
) == CONSTRUCTOR
4557 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
4559 error ("braces around scalar initializer for type %qT", type
);
4560 init
= error_mark_node
;
4569 All implicit type conversions (clause _conv_) are considered when
4570 initializing the aggregate member with an initializer from an
4571 initializer-list. If the initializer can initialize a member,
4572 the member is initialized. Otherwise, if the member is itself a
4573 non-empty subaggregate, brace elision is assumed and the
4574 initializer is considered for the initialization of the first
4575 member of the subaggregate. */
4576 if (TREE_CODE (init
) != CONSTRUCTOR
4577 && can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
))
4583 /* [dcl.init.string]
4585 A char array (whether plain char, signed char, or unsigned char)
4586 can be initialized by a string-literal (optionally enclosed in
4587 braces); a wchar_t array can be initialized by a wide
4588 string-literal (optionally enclosed in braces). */
4589 if (TREE_CODE (type
) == ARRAY_TYPE
4590 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
4592 tree str_init
= init
;
4594 /* Strip one level of braces if and only if they enclose a single
4595 element (as allowed by [dcl.init.string]). */
4596 if (!first_initializer_p
4597 && TREE_CODE (str_init
) == CONSTRUCTOR
4598 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
4600 str_init
= VEC_index (constructor_elt
,
4601 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
4604 /* If it's a string literal, then it's the initializer for the array
4605 as a whole. Otherwise, continue with normal initialization for
4606 array types (one value per array element). */
4607 if (TREE_CODE (str_init
) == STRING_CST
)
4614 /* The following cases are about aggregates. If we are not within a full
4615 initializer already, and there is not a CONSTRUCTOR, it means that there
4616 is a missing set of braces (that is, we are processing the case for
4617 which reshape_init exists). */
4618 if (!first_initializer_p
)
4620 if (TREE_CODE (init
) == CONSTRUCTOR
)
4622 /* For a nested compound literal, there is no need to reshape since
4623 brace elision is not allowed. Even if we decided to allow it,
4624 we should add a call to reshape_init in finish_compound_literal,
4625 before calling digest_init, so changing this code would still
4626 not be necessary. */
4627 if (!COMPOUND_LITERAL_P (init
))
4630 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
4631 return reshape_init (type
, init
);
4634 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
4637 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
4641 /* Dispatch to specialized routines. */
4642 if (CLASS_TYPE_P (type
))
4643 return reshape_init_class (type
, d
, first_initializer_p
);
4644 else if (TREE_CODE (type
) == ARRAY_TYPE
)
4645 return reshape_init_array (type
, d
);
4646 else if (TREE_CODE (type
) == VECTOR_TYPE
)
4647 return reshape_init_vector (type
, d
);
4652 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4653 brace-enclosed aggregate initializer.
4655 INIT is the CONSTRUCTOR containing the list of initializers describing
4656 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4657 It may not presently match the shape of the TYPE; for example:
4659 struct S { int a; int b; };
4660 struct S a[] = { 1, 2, 3, 4 };
4662 Here INIT will hold a VEC of four elements, rather than a
4663 VEC of two elements, each itself a VEC of two elements. This
4664 routine transforms INIT from the former form into the latter. The
4665 revised CONSTRUCTOR node is returned. */
4668 reshape_init (tree type
, tree init
)
4670 VEC(constructor_elt
, gc
) *v
;
4674 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
4676 v
= CONSTRUCTOR_ELTS (init
);
4678 /* An empty constructor does not need reshaping, and it is always a valid
4680 if (VEC_empty (constructor_elt
, v
))
4683 /* Recurse on this CONSTRUCTOR. */
4684 d
.cur
= VEC_index (constructor_elt
, v
, 0);
4685 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
4687 new_init
= reshape_init_r (type
, &d
, true);
4688 if (new_init
== error_mark_node
)
4689 return error_mark_node
;
4691 /* Make sure all the element of the constructor were used. Otherwise,
4692 issue an error about exceeding initializers. */
4694 error ("too many initializers for %qT", type
);
4699 /* Verify INIT (the initializer for DECL), and record the
4700 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4701 grok_reference_init.
4703 If the return value is non-NULL, it is an expression that must be
4704 evaluated dynamically to initialize DECL. */
4707 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
4709 tree type
= TREE_TYPE (decl
);
4710 tree init_code
= NULL
;
4712 /* Things that are going to be initialized need to have complete
4714 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
4716 if (type
== error_mark_node
)
4717 /* We will have already complained. */
4720 if (TREE_CODE (type
) == ARRAY_TYPE
)
4722 tree element_type
= TREE_TYPE (type
);
4724 /* The array type itself need not be complete, because the
4725 initializer may tell us how many elements are in the array.
4726 But, the elements of the array must be complete. */
4727 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
4729 error ("elements of array %q#D have incomplete type", decl
);
4732 /* It is not valid to initialize a VLA. */
4734 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
4735 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
4737 error ("variable-sized object %qD may not be initialized", decl
);
4741 else if (!COMPLETE_TYPE_P (type
))
4743 error ("%qD has incomplete type", decl
);
4744 TREE_TYPE (decl
) = error_mark_node
;
4748 /* There is no way to make a variable-sized class type in GNU C++. */
4749 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
4751 if (!CP_AGGREGATE_TYPE_P (type
)
4752 && init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
4753 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
)) != 1)
4755 error ("scalar object %qD requires one element in initializer", decl
);
4756 TREE_TYPE (decl
) = error_mark_node
;
4760 if (TREE_CODE (decl
) == CONST_DECL
)
4762 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
4764 DECL_INITIAL (decl
) = init
;
4766 gcc_assert (init
!= NULL_TREE
);
4769 else if (!DECL_EXTERNAL (decl
) && TREE_CODE (type
) == REFERENCE_TYPE
)
4770 init
= grok_reference_init (decl
, type
, init
, cleanup
);
4773 /* Do not reshape constructors of vectors (they don't need to be
4775 if (TREE_CODE (init
) == CONSTRUCTOR
4776 && !COMPOUND_LITERAL_P (init
)
4777 && !TREE_TYPE (init
)) /* ptrmemfunc */
4779 init
= reshape_init (type
, init
);
4781 if ((*targetm
.vector_opaque_p
) (type
))
4783 error ("opaque vector types cannot be initialized");
4784 init
= error_mark_node
;
4788 /* If DECL has an array type without a specific bound, deduce the
4789 array size from the initializer. */
4790 maybe_deduce_size_from_array_init (decl
, init
);
4791 type
= TREE_TYPE (decl
);
4792 if (type
== error_mark_node
)
4795 if (TYPE_HAS_CONSTRUCTOR (type
) || TYPE_NEEDS_CONSTRUCTING (type
))
4797 if (TREE_CODE (type
) == ARRAY_TYPE
)
4798 goto initialize_aggr
;
4799 else if (TREE_CODE (init
) == CONSTRUCTOR
)
4801 if (TYPE_NON_AGGREGATE_CLASS (type
))
4803 error ("%qD must be initialized by constructor, "
4806 init
= error_mark_node
;
4809 goto dont_use_constructor
;
4813 int saved_stmts_are_full_exprs_p
;
4816 saved_stmts_are_full_exprs_p
= 0;
4817 if (building_stmt_tree ())
4819 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4820 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4822 init
= build_aggr_init (decl
, init
, flags
);
4823 if (building_stmt_tree ())
4824 current_stmt_tree ()->stmts_are_full_exprs_p
=
4825 saved_stmts_are_full_exprs_p
;
4831 dont_use_constructor
:
4832 if (TREE_CODE (init
) != TREE_VEC
)
4834 init_code
= store_init_value (decl
, init
);
4835 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
4836 && DECL_INITIAL (decl
)
4837 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
4838 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
4839 warning (0, "array %qD initialized by parenthesized string literal %qE",
4840 decl
, DECL_INITIAL (decl
));
4845 else if (DECL_EXTERNAL (decl
))
4847 else if (TYPE_P (type
) && TYPE_NEEDS_CONSTRUCTING (type
))
4848 goto initialize_aggr
;
4849 else if (IS_AGGR_TYPE (type
))
4851 tree core_type
= strip_array_types (type
);
4853 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
))
4854 error ("structure %qD with uninitialized const members", decl
);
4855 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
))
4856 error ("structure %qD with uninitialized reference members", decl
);
4858 check_for_uninitialized_const_var (decl
);
4861 check_for_uninitialized_const_var (decl
);
4863 if (init
&& init
!= error_mark_node
)
4864 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
4869 /* If DECL is not a local variable, give it RTL. */
4872 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
4874 int toplev
= toplevel_bindings_p ();
4876 const char *filename
;
4878 /* Set the DECL_ASSEMBLER_NAME for the object. */
4881 /* The `register' keyword, when used together with an
4882 asm-specification, indicates that the variable should be
4883 placed in a particular register. */
4884 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
4886 set_user_assembler_name (decl
, asmspec
);
4887 DECL_HARD_REGISTER (decl
) = 1;
4891 if (TREE_CODE (decl
) == FUNCTION_DECL
4892 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
4893 set_builtin_user_assembler_name (decl
, asmspec
);
4894 set_user_assembler_name (decl
, asmspec
);
4898 /* Handle non-variables up front. */
4899 if (TREE_CODE (decl
) != VAR_DECL
)
4901 rest_of_decl_compilation (decl
, toplev
, at_eof
);
4905 /* If we see a class member here, it should be a static data
4907 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
4909 gcc_assert (TREE_STATIC (decl
));
4910 /* An in-class declaration of a static data member should be
4911 external; it is only a declaration, and not a definition. */
4912 if (init
== NULL_TREE
)
4913 gcc_assert (DECL_EXTERNAL (decl
));
4916 /* We don't create any RTL for local variables. */
4917 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
4920 /* We defer emission of local statics until the corresponding
4921 DECL_EXPR is expanded. */
4922 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
4924 /* We try to defer namespace-scope static constants so that they are
4925 not emitted into the object file unnecessarily. */
4926 filename
= input_filename
;
4927 if (!DECL_VIRTUAL_P (decl
)
4928 && TREE_READONLY (decl
)
4929 && DECL_INITIAL (decl
) != NULL_TREE
4930 && DECL_INITIAL (decl
) != error_mark_node
4932 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
4934 && !TREE_PUBLIC (decl
))
4936 /* Fool with the linkage of static consts according to #pragma
4938 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
4939 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
4941 TREE_PUBLIC (decl
) = 1;
4942 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
4947 /* Likewise for template instantiations. */
4948 else if (DECL_LANG_SPECIFIC (decl
)
4949 && DECL_IMPLICIT_INSTANTIATION (decl
))
4952 /* If we're not deferring, go ahead and assemble the variable. */
4954 rest_of_decl_compilation (decl
, toplev
, at_eof
);
4957 /* Generate code to initialize DECL (a local variable). */
4960 initialize_local_var (tree decl
, tree init
)
4962 tree type
= TREE_TYPE (decl
);
4965 gcc_assert (TREE_CODE (decl
) == VAR_DECL
4966 || TREE_CODE (decl
) == RESULT_DECL
);
4967 gcc_assert (!TREE_STATIC (decl
));
4969 if (DECL_SIZE (decl
) == NULL_TREE
)
4971 /* If we used it already as memory, it must stay in memory. */
4972 DECL_INITIAL (decl
) = NULL_TREE
;
4973 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
4976 if (DECL_SIZE (decl
) && type
!= error_mark_node
)
4980 /* Compute and store the initial value. */
4981 already_used
= TREE_USED (decl
) || TREE_USED (type
);
4983 /* Perform the initialization. */
4986 int saved_stmts_are_full_exprs_p
;
4988 gcc_assert (building_stmt_tree ());
4989 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4990 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4991 finish_expr_stmt (init
);
4992 current_stmt_tree ()->stmts_are_full_exprs_p
=
4993 saved_stmts_are_full_exprs_p
;
4996 /* Set this to 0 so we can tell whether an aggregate which was
4997 initialized was ever used. Don't do this if it has a
4998 destructor, so we don't complain about the 'resource
4999 allocation is initialization' idiom. Now set
5000 attribute((unused)) on types so decls of that type will be
5001 marked used. (see TREE_USED, above.) */
5002 if (TYPE_NEEDS_CONSTRUCTING (type
)
5004 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5005 && DECL_NAME (decl
))
5006 TREE_USED (decl
) = 0;
5007 else if (already_used
)
5008 TREE_USED (decl
) = 1;
5011 /* Generate a cleanup, if necessary. */
5012 cleanup
= cxx_maybe_build_cleanup (decl
);
5013 if (DECL_SIZE (decl
) && cleanup
)
5014 finish_decl_cleanup (decl
, cleanup
);
5017 /* DECL is a VAR_DECL for a compiler-generated variable with static
5018 storage duration (like a virtual table) whose initializer is a
5019 compile-time constant. INIT must be either a TREE_LIST of values,
5020 or a CONSTRUCTOR. Initialize the variable and provide it to the
5024 initialize_artificial_var (tree decl
, tree init
)
5026 gcc_assert (DECL_ARTIFICIAL (decl
));
5027 if (TREE_CODE (init
) == TREE_LIST
)
5028 init
= build_constructor_from_list (NULL_TREE
, init
);
5029 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5030 DECL_INITIAL (decl
) = init
;
5031 DECL_INITIALIZED_P (decl
) = 1;
5032 determine_visibility (decl
);
5033 layout_var_decl (decl
);
5034 maybe_commonize_var (decl
);
5035 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5038 /* Finish processing of a declaration;
5039 install its line number and initial value.
5040 If the length of an array type is not known before,
5041 it must be determined now, from the initial value, or it is an error.
5043 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5044 true, then INIT is an integral constant expression.
5046 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5047 if the (init) syntax was used. */
5050 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5051 tree asmspec_tree
, int flags
)
5055 const char *asmspec
= NULL
;
5056 int was_readonly
= 0;
5057 bool var_definition_p
= false;
5058 int saved_processing_template_decl
;
5060 if (decl
== error_mark_node
)
5065 error ("assignment (not initialization) in declaration");
5069 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5070 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5071 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
5073 type
= TREE_TYPE (decl
);
5074 if (type
== error_mark_node
)
5077 /* Assume no cleanup is required. */
5078 cleanup
= NULL_TREE
;
5079 saved_processing_template_decl
= processing_template_decl
;
5081 /* If a name was specified, get the string. */
5082 if (global_scope_p (current_binding_level
))
5083 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
5084 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
5085 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
5087 if (current_class_type
5088 && CP_DECL_CONTEXT (decl
) == current_class_type
5089 && TYPE_BEING_DEFINED (current_class_type
)
5090 && (DECL_INITIAL (decl
) || init
))
5091 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
5093 if (processing_template_decl
)
5095 bool type_dependent_p
;
5097 /* Add this declaration to the statement-tree. */
5098 if (at_function_scope_p ())
5099 add_decl_expr (decl
);
5101 type_dependent_p
= dependent_type_p (type
);
5103 if (init
&& init_const_expr_p
)
5105 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
5106 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl
))
5107 TREE_CONSTANT (decl
) = 1;
5111 || !DECL_CLASS_SCOPE_P (decl
)
5112 || !DECL_INTEGRAL_CONSTANT_VAR_P (decl
)
5114 || value_dependent_expression_p (init
)
5115 /* Check also if initializer is a value dependent
5116 { integral_constant_expression }. */
5117 || (TREE_CODE (init
) == CONSTRUCTOR
5118 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
)) == 1
5119 && value_dependent_expression_p
5120 (VEC_index (constructor_elt
,
5121 CONSTRUCTOR_ELTS (init
), 0)->value
)))
5124 DECL_INITIAL (decl
) = init
;
5125 if (TREE_CODE (decl
) == VAR_DECL
5126 && !DECL_PRETTY_FUNCTION_P (decl
)
5127 && !type_dependent_p
)
5128 maybe_deduce_size_from_array_init (decl
, init
);
5132 init
= fold_non_dependent_expr (init
);
5133 processing_template_decl
= 0;
5136 /* Take care of TYPE_DECLs up front. */
5137 if (TREE_CODE (decl
) == TYPE_DECL
)
5139 if (type
!= error_mark_node
5140 && IS_AGGR_TYPE (type
) && DECL_NAME (decl
))
5142 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
5143 warning (0, "shadowing previous type declaration of %q#D", decl
);
5144 set_identifier_type_value (DECL_NAME (decl
), decl
);
5147 /* If we have installed this as the canonical typedef for this
5148 type, and that type has not been defined yet, delay emitting
5149 the debug information for it, as we will emit it later. */
5150 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
5151 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
5152 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
5154 rest_of_decl_compilation (decl
, DECL_CONTEXT (decl
) == NULL_TREE
,
5159 /* A reference will be modified here, as it is initialized. */
5160 if (! DECL_EXTERNAL (decl
)
5161 && TREE_READONLY (decl
)
5162 && TREE_CODE (type
) == REFERENCE_TYPE
)
5165 TREE_READONLY (decl
) = 0;
5168 if (TREE_CODE (decl
) == VAR_DECL
)
5170 /* Only PODs can have thread-local storage. Other types may require
5171 various kinds of non-trivial initialization. */
5172 if (DECL_THREAD_LOCAL_P (decl
) && !pod_type_p (TREE_TYPE (decl
)))
5173 error ("%qD cannot be thread-local because it has non-POD type %qT",
5174 decl
, TREE_TYPE (decl
));
5175 /* If this is a local variable that will need a mangled name,
5176 register it now. We must do this before processing the
5177 initializer for the variable, since the initialization might
5178 require a guard variable, and since the mangled name of the
5179 guard variable will depend on the mangled name of this
5181 if (!processing_template_decl
5182 && DECL_FUNCTION_SCOPE_P (decl
)
5183 && TREE_STATIC (decl
)
5184 && !DECL_ARTIFICIAL (decl
))
5185 push_local_name (decl
);
5186 /* Convert the initializer to the type of DECL, if we have not
5187 already initialized DECL. */
5188 if (!DECL_INITIALIZED_P (decl
)
5189 /* If !DECL_EXTERNAL then DECL is being defined. In the
5190 case of a static data member initialized inside the
5191 class-specifier, there can be an initializer even if DECL
5192 is *not* defined. */
5193 && (!DECL_EXTERNAL (decl
) || init
))
5197 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
5198 if (init_const_expr_p
)
5200 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
5201 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl
))
5202 TREE_CONSTANT (decl
) = 1;
5205 init
= check_initializer (decl
, init
, flags
, &cleanup
);
5206 /* Thread-local storage cannot be dynamically initialized. */
5207 if (DECL_THREAD_LOCAL_P (decl
) && init
)
5209 error ("%qD is thread-local and so cannot be dynamically "
5210 "initialized", decl
);
5214 /* Check that the initializer for a static data member was a
5215 constant. Although we check in the parser that the
5216 initializer is an integral constant expression, we do not
5217 simplify division-by-zero at the point at which it
5218 occurs. Therefore, in:
5220 struct S { static const int i = 7 / 0; };
5222 we issue an error at this point. It would
5223 probably be better to forbid division by zero in
5224 integral constant expressions. */
5225 if (DECL_EXTERNAL (decl
) && init
)
5227 error ("%qD cannot be initialized by a non-constant expression"
5228 " when being declared", decl
);
5229 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
5237 The memory occupied by any object of static storage
5238 duration is zero-initialized at program startup before
5239 any other initialization takes place.
5241 We cannot create an appropriate initializer until after
5242 the type of DECL is finalized. If DECL_INITIAL is set,
5243 then the DECL is statically initialized, and any
5244 necessary zero-initialization has already been performed. */
5245 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
5246 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
5247 /*nelts=*/NULL_TREE
,
5248 /*static_storage_p=*/true);
5249 /* Remember that the initialization for this variable has
5251 DECL_INITIALIZED_P (decl
) = 1;
5252 /* This declaration is the definition of this variable,
5253 unless we are initializing a static data member within
5254 the class specifier. */
5255 if (!DECL_EXTERNAL (decl
))
5256 var_definition_p
= true;
5258 /* If the variable has an array type, lay out the type, even if
5259 there is no initializer. It is valid to index through the
5260 array, and we must get TYPE_ALIGN set correctly on the array
5262 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5266 /* Add this declaration to the statement-tree. This needs to happen
5267 after the call to check_initializer so that the DECL_EXPR for a
5268 reference temp is added before the DECL_EXPR for the reference itself. */
5269 if (at_function_scope_p ())
5270 add_decl_expr (decl
);
5272 /* Let the middle end know about variables and functions -- but not
5273 static data members in uninstantiated class templates. */
5274 if (!saved_processing_template_decl
5275 && (TREE_CODE (decl
) == VAR_DECL
5276 || TREE_CODE (decl
) == FUNCTION_DECL
))
5278 if (TREE_CODE (decl
) == VAR_DECL
)
5280 layout_var_decl (decl
);
5281 maybe_commonize_var (decl
);
5282 if (DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
)
5283 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
5285 /* This is a const variable with implicit 'static'. Set
5286 DECL_THIS_STATIC so we can tell it from variables that are
5287 !TREE_PUBLIC because of the anonymous namespace. */
5288 DECL_THIS_STATIC (decl
) = 1;
5292 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
5294 /* Check for abstractness of the type. Notice that there is no
5295 need to strip array types here since the check for those types
5296 is already done within create_array_type_for_decl. */
5297 if (TREE_CODE (type
) == FUNCTION_TYPE
5298 || TREE_CODE (type
) == METHOD_TYPE
)
5299 abstract_virtuals_error (decl
, TREE_TYPE (type
));
5301 abstract_virtuals_error (decl
, type
);
5303 /* This needs to happen after the linkage is set. */
5304 determine_visibility (decl
);
5306 if (TREE_CODE (decl
) == FUNCTION_DECL
5307 || TREE_TYPE (decl
) == error_mark_node
)
5308 /* No initialization required. */
5310 else if (DECL_EXTERNAL (decl
)
5311 && ! (DECL_LANG_SPECIFIC (decl
)
5312 && DECL_NOT_REALLY_EXTERN (decl
)))
5315 DECL_INITIAL (decl
) = init
;
5319 /* A variable definition. */
5320 if (DECL_FUNCTION_SCOPE_P (decl
))
5322 /* Initialize the local variable. */
5323 if (processing_template_decl
)
5324 DECL_INITIAL (decl
) = init
;
5325 else if (!TREE_STATIC (decl
))
5326 initialize_local_var (decl
, init
);
5329 /* If a variable is defined, and then a subsequent
5330 definition with external linkage is encountered, we will
5331 get here twice for the same variable. We want to avoid
5332 calling expand_static_init more than once. For variables
5333 that are not static data members, we can call
5334 expand_static_init only when we actually process the
5335 initializer. It is not legal to redeclare a static data
5336 member, so this issue does not arise in that case. */
5337 if (var_definition_p
&& TREE_STATIC (decl
))
5338 expand_static_init (decl
, init
);
5342 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5343 reference, insert it in the statement-tree now. */
5345 push_cleanup (decl
, cleanup
, false);
5348 processing_template_decl
= saved_processing_template_decl
;
5351 TREE_READONLY (decl
) = 1;
5353 /* If this was marked 'used', be sure it will be output. */
5354 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl
)))
5355 mark_decl_referenced (decl
);
5358 /* This is here for a midend callback from c-common.c. */
5361 finish_decl (tree decl
, tree init
, tree asmspec_tree
)
5363 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, asmspec_tree
, 0);
5366 /* Returns a declaration for a VAR_DECL as if:
5368 extern "C" TYPE NAME;
5370 had been seen. Used to create compiler-generated global
5374 declare_global_var (tree name
, tree type
)
5378 push_to_top_level ();
5379 decl
= build_decl (VAR_DECL
, name
, type
);
5380 TREE_PUBLIC (decl
) = 1;
5381 DECL_EXTERNAL (decl
) = 1;
5382 DECL_ARTIFICIAL (decl
) = 1;
5383 /* If the user has explicitly declared this variable (perhaps
5384 because the code we are compiling is part of a low-level runtime
5385 library), then it is possible that our declaration will be merged
5386 with theirs by pushdecl. */
5387 decl
= pushdecl (decl
);
5388 finish_decl (decl
, NULL_TREE
, NULL_TREE
);
5389 pop_from_top_level ();
5394 /* Returns a pointer to the `atexit' function. Note that if
5395 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5396 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5399 get_atexit_node (void)
5406 bool use_aeabi_atexit
;
5411 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
5413 /* The declaration for `__cxa_atexit' is:
5415 int __cxa_atexit (void (*)(void *), void *, void *)
5417 We build up the argument types and then then function type
5420 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
5421 /* First, build the pointer-to-function type for the first
5423 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5424 fn_type
= build_function_type (void_type_node
, arg_types
);
5425 fn_ptr_type
= build_pointer_type (fn_type
);
5426 /* Then, build the rest of the argument types. */
5427 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
5428 if (use_aeabi_atexit
)
5430 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
5431 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
5435 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
5436 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
5438 /* And the final __cxa_atexit type. */
5439 fn_type
= build_function_type (integer_type_node
, arg_types
);
5440 fn_ptr_type
= build_pointer_type (fn_type
);
5441 if (use_aeabi_atexit
)
5442 name
= "__aeabi_atexit";
5444 name
= "__cxa_atexit";
5448 /* The declaration for `atexit' is:
5450 int atexit (void (*)());
5452 We build up the argument types and then then function type
5454 fn_type
= build_function_type (void_type_node
, void_list_node
);
5455 fn_ptr_type
= build_pointer_type (fn_type
);
5456 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, void_list_node
);
5457 /* Build the final atexit type. */
5458 fn_type
= build_function_type (integer_type_node
, arg_types
);
5462 /* Now, build the function declaration. */
5463 push_lang_context (lang_name_c
);
5464 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
5465 mark_used (atexit_fndecl
);
5466 pop_lang_context ();
5467 atexit_node
= decay_conversion (atexit_fndecl
);
5472 /* Returns the __dso_handle VAR_DECL. */
5475 get_dso_handle_node (void)
5477 if (dso_handle_node
)
5478 return dso_handle_node
;
5480 /* Declare the variable. */
5481 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
5484 return dso_handle_node
;
5487 /* Begin a new function with internal linkage whose job will be simply
5488 to destroy some particular variable. */
5490 static GTY(()) int start_cleanup_cnt
;
5493 start_cleanup_fn (void)
5499 bool use_cxa_atexit
= flag_use_cxa_atexit
5500 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
5502 push_to_top_level ();
5504 /* No need to mangle this. */
5505 push_lang_context (lang_name_c
);
5507 /* Build the parameter-types. */
5508 parmtypes
= void_list_node
;
5509 /* Functions passed to __cxa_atexit take an additional parameter.
5510 We'll just ignore it. After we implement the new calling
5511 convention for destructors, we can eliminate the use of
5512 additional cleanup functions entirely in the -fnew-abi case. */
5514 parmtypes
= tree_cons (NULL_TREE
, ptr_type_node
, parmtypes
);
5515 /* Build the function type itself. */
5516 fntype
= build_function_type (void_type_node
, parmtypes
);
5517 /* Build the name of the function. */
5518 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
5519 /* Build the function declaration. */
5520 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
5521 /* It's a function with internal linkage, generated by the
5523 TREE_PUBLIC (fndecl
) = 0;
5524 DECL_ARTIFICIAL (fndecl
) = 1;
5525 /* Make the function `inline' so that it is only emitted if it is
5526 actually needed. It is unlikely that it will be inlined, since
5527 it is only called via a function pointer, but we avoid unnecessary
5528 emissions this way. */
5529 DECL_INLINE (fndecl
) = 1;
5530 DECL_DECLARED_INLINE_P (fndecl
) = 1;
5531 DECL_INTERFACE_KNOWN (fndecl
) = 1;
5532 /* Build the parameter. */
5537 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
5538 DECL_CONTEXT (parmdecl
) = fndecl
;
5539 TREE_USED (parmdecl
) = 1;
5540 DECL_ARGUMENTS (fndecl
) = parmdecl
;
5544 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
5546 pop_lang_context ();
5548 return current_function_decl
;
5551 /* Finish the cleanup function begun by start_cleanup_fn. */
5554 end_cleanup_fn (void)
5556 expand_or_defer_fn (finish_function (0));
5558 pop_from_top_level ();
5561 /* Generate code to handle the destruction of DECL, an object with
5562 static storage duration. */
5565 register_dtor_fn (tree decl
)
5572 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5573 return void_zero_node
;
5575 /* Call build_cleanup before we enter the anonymous function so that
5576 any access checks will be done relative to the current scope,
5577 rather than the scope of the anonymous function. */
5578 build_cleanup (decl
);
5580 /* Now start the function. */
5581 cleanup
= start_cleanup_fn ();
5583 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5584 to the original function, rather than the anonymous one. That
5585 will make the back end think that nested functions are in use,
5586 which causes confusion. */
5588 push_deferring_access_checks (dk_no_check
);
5589 fcall
= build_cleanup (decl
);
5590 pop_deferring_access_checks ();
5592 /* Create the body of the anonymous function. */
5593 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
5594 finish_expr_stmt (fcall
);
5595 finish_compound_stmt (compound_stmt
);
5598 /* Call atexit with the cleanup function. */
5599 cxx_mark_addressable (cleanup
);
5600 mark_used (cleanup
);
5601 cleanup
= build_unary_op (ADDR_EXPR
, cleanup
, 0);
5602 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
5604 args
= tree_cons (NULL_TREE
,
5605 build_unary_op (ADDR_EXPR
, get_dso_handle_node (), 0),
5607 if (targetm
.cxx
.use_aeabi_atexit ())
5609 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5610 args
= tree_cons (NULL_TREE
, null_pointer_node
, args
);
5614 args
= tree_cons (NULL_TREE
, null_pointer_node
, args
);
5615 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5619 args
= tree_cons (NULL_TREE
, cleanup
, NULL_TREE
);
5620 return build_function_call (get_atexit_node (), args
);
5623 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5624 is its initializer. Generate code to handle the construction
5625 and destruction of DECL. */
5628 expand_static_init (tree decl
, tree init
)
5630 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
5631 gcc_assert (TREE_STATIC (decl
));
5633 /* Some variables require no initialization. */
5635 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
5636 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5639 if (DECL_FUNCTION_SCOPE_P (decl
))
5641 /* Emit code to perform this initialization but once. */
5642 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
5643 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
5644 tree guard
, guard_addr
, guard_addr_list
;
5645 tree acquire_fn
, release_fn
, abort_fn
;
5648 /* Emit code to perform this initialization but once. This code
5651 static <type> guard;
5652 if (!guard.first_byte) {
5653 if (__cxa_guard_acquire (&guard)) {
5656 // Do initialization.
5657 flag = true; __cxa_guard_release (&guard);
5658 // Register variable for destruction at end of program.
5660 if (!flag) __cxa_guard_abort (&guard);
5664 Note that the `flag' variable is only set to 1 *after* the
5665 initialization is complete. This ensures that an exception,
5666 thrown during the construction, will cause the variable to
5667 reinitialized when we pass through this code again, as per:
5671 If the initialization exits by throwing an exception, the
5672 initialization is not complete, so it will be tried again
5673 the next time control enters the declaration.
5675 This process should be thread-safe, too; multiple threads
5676 should not be able to initialize the variable more than
5679 /* Create the guard variable. */
5680 guard
= get_guard (decl
);
5682 /* This optimization isn't safe on targets with relaxed memory
5683 consistency. On such targets we force synchronization in
5684 __cxa_guard_acquire. */
5685 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
5687 /* Begin the conditional initialization. */
5688 if_stmt
= begin_if_stmt ();
5689 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
5690 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5693 if (flag_threadsafe_statics
)
5695 guard_addr
= build_address (guard
);
5696 guard_addr_list
= build_tree_list (NULL_TREE
, guard_addr
);
5698 acquire_fn
= get_identifier ("__cxa_guard_acquire");
5699 release_fn
= get_identifier ("__cxa_guard_release");
5700 abort_fn
= get_identifier ("__cxa_guard_abort");
5701 if (!get_global_value_if_present (acquire_fn
, &acquire_fn
))
5703 tree argtypes
= tree_cons (NULL_TREE
, TREE_TYPE (guard_addr
),
5705 tree vfntype
= build_function_type (void_type_node
, argtypes
);
5706 acquire_fn
= push_library_fn
5707 (acquire_fn
, build_function_type (integer_type_node
, argtypes
));
5708 release_fn
= push_library_fn (release_fn
, vfntype
);
5709 abort_fn
= push_library_fn (abort_fn
, vfntype
);
5713 release_fn
= identifier_global_value (release_fn
);
5714 abort_fn
= identifier_global_value (abort_fn
);
5717 inner_if_stmt
= begin_if_stmt ();
5718 finish_if_stmt_cond (build_call (acquire_fn
, guard_addr_list
),
5721 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
5722 begin
= get_target_expr (boolean_false_node
);
5723 flag
= TARGET_EXPR_SLOT (begin
);
5725 TARGET_EXPR_CLEANUP (begin
)
5726 = build3 (COND_EXPR
, void_type_node
, flag
,
5728 build_call (abort_fn
, guard_addr_list
));
5729 CLEANUP_EH_ONLY (begin
) = 1;
5731 /* Do the initialization itself. */
5732 init
= add_stmt_to_compound (begin
, init
);
5733 init
= add_stmt_to_compound
5734 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
5735 init
= add_stmt_to_compound
5736 (init
, build_call (release_fn
, guard_addr_list
));
5739 init
= add_stmt_to_compound (init
, set_guard (guard
));
5741 /* Use atexit to register a function for destroying this static
5743 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
5745 finish_expr_stmt (init
);
5747 if (flag_threadsafe_statics
)
5749 finish_compound_stmt (inner_then_clause
);
5750 finish_then_clause (inner_if_stmt
);
5751 finish_if_stmt (inner_if_stmt
);
5754 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
5756 finish_compound_stmt (then_clause
);
5757 finish_then_clause (if_stmt
);
5758 finish_if_stmt (if_stmt
);
5762 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
5766 /* Make TYPE a complete type based on INITIAL_VALUE.
5767 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5768 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5769 3 if the initializer list is empty (in pedantic mode). */
5772 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
5775 tree type
, elt_type
;
5779 /* An array of character type can be initialized from a
5780 brace-enclosed string constant.
5782 FIXME: this code is duplicated from reshape_init. Probably
5783 we should just call reshape_init here? */
5784 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
5785 && TREE_CODE (initial_value
) == CONSTRUCTOR
5786 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
5788 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
5789 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
5791 if (TREE_CODE (value
) == STRING_CST
5792 && VEC_length (constructor_elt
, v
) == 1)
5793 initial_value
= value
;
5797 failure
= complete_array_type (ptype
, initial_value
, do_default
);
5799 /* We can create the array before the element type is complete, which
5800 means that we didn't have these two bits set in the original type
5801 either. In completing the type, we are expected to propagate these
5802 bits. See also complete_type which does the same thing for arrays
5805 if (TYPE_DOMAIN (type
))
5807 elt_type
= TREE_TYPE (type
);
5808 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
5809 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
5810 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
5816 /* Return zero if something is declared to be a member of type
5817 CTYPE when in the context of CUR_TYPE. STRING is the error
5818 message to print in that case. Otherwise, quietly return 1. */
5821 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
5823 if (ctype
&& ctype
!= cur_type
)
5825 if (flags
== DTOR_FLAG
)
5826 error ("destructor for alien class %qT cannot be a member", ctype
);
5828 error ("constructor for alien class %qT cannot be a member", ctype
);
5834 /* Subroutine of `grokdeclarator'. */
5836 /* Generate errors possibly applicable for a given set of specifiers.
5837 This is for ARM $7.1.2. */
5840 bad_specifiers (tree object
,
5849 error ("%qD declared as a %<virtual%> %s", object
, type
);
5851 error ("%qD declared as an %<inline%> %s", object
, type
);
5853 error ("%<const%> and %<volatile%> function specifiers on "
5854 "%qD invalid in %s declaration",
5857 error ("%q+D declared as a friend", object
);
5859 && (TREE_CODE (object
) == TYPE_DECL
5860 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
5861 && !TYPE_REFFN_P (TREE_TYPE (object
))
5862 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
5863 error ("%q+D declared with an exception specification", object
);
5866 /* DECL is a member function or static data member and is presently
5867 being defined. Check that the definition is taking place in a
5871 check_class_member_definition_namespace (tree decl
)
5873 /* These checks only apply to member functions and static data
5875 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
5876 || TREE_CODE (decl
) == VAR_DECL
);
5877 /* We check for problems with specializations in pt.c in
5878 check_specialization_namespace, where we can issue better
5880 if (processing_specialization
)
5882 /* There are no restrictions on the placement of
5883 explicit instantiations. */
5884 if (processing_explicit_instantiation
)
5888 A member function definition that appears outside of the
5889 class definition shall appear in a namespace scope enclosing
5890 the class definition.
5894 The definition for a static data member shall appear in a
5895 namespace scope enclosing the member's class definition. */
5896 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
5897 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5898 decl
, DECL_CONTEXT (decl
));
5901 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5902 METHOD_TYPE for a non-static member function; QUALS are the
5903 cv-qualifiers that apply to the function. */
5906 build_this_parm (tree type
, cp_cv_quals quals
)
5911 cp_cv_quals this_quals
;
5913 this_type
= TREE_VALUE (TYPE_ARG_TYPES (type
));
5914 /* The `this' parameter is implicitly `const'; it cannot be
5916 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
5917 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
5918 parm
= build_artificial_parm (this_identifier
, qual_type
);
5919 cp_apply_type_quals_to_decl (this_quals
, parm
);
5923 /* CTYPE is class type, or null if non-class.
5924 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5926 DECLARATOR is the function's name.
5927 PARMS is a chain of PARM_DECLs for the function.
5928 VIRTUALP is truthvalue of whether the function is virtual or not.
5929 FLAGS are to be passed through to `grokclassfn'.
5930 QUALS are qualifiers indicating whether the function is `const'
5932 RAISES is a list of exceptions that this function can raise.
5933 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5934 not look, and -1 if we should not call `grokclassfn' at all.
5936 SFK is the kind of special function (if any) for the new function.
5938 Returns `NULL_TREE' if something goes wrong, after issuing
5939 applicable error messages. */
5942 grokfndecl (tree ctype
,
5946 tree orig_declarator
,
5948 enum overload_flags flags
,
5955 special_function_kind sfk
,
5962 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
5966 type
= build_exception_variant (type
, raises
);
5968 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
5969 if (TREE_CODE (type
) == METHOD_TYPE
)
5972 parm
= build_this_parm (type
, quals
);
5973 TREE_CHAIN (parm
) = parms
;
5976 DECL_ARGUMENTS (decl
) = parms
;
5977 /* Propagate volatile out from type to decl. */
5978 if (TYPE_VOLATILE (type
))
5979 TREE_THIS_VOLATILE (decl
) = 1;
5982 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
5986 ("defining explicit specialization %qD in friend declaration",
5990 tree fns
= TREE_OPERAND (orig_declarator
, 0);
5991 tree args
= TREE_OPERAND (orig_declarator
, 1);
5993 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5995 /* Something like `template <class T> friend void f<T>()'. */
5996 error ("invalid use of template-id %qD in declaration "
5997 "of primary template",
6003 /* A friend declaration of the form friend void f<>(). Record
6004 the information in the TEMPLATE_ID_EXPR. */
6005 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
6007 if (TREE_CODE (fns
) == COMPONENT_REF
)
6009 /* Due to bison parser ickiness, we will have already looked
6010 up an operator_name or PFUNCNAME within the current class
6011 (see template_id in parse.y). If the current class contains
6012 such a name, we'll get a COMPONENT_REF here. Undo that. */
6014 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
6015 == current_class_type
);
6016 fns
= TREE_OPERAND (fns
, 1);
6018 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
6019 || TREE_CODE (fns
) == OVERLOAD
);
6020 DECL_TEMPLATE_INFO (decl
) = tree_cons (fns
, args
, NULL_TREE
);
6022 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
6023 if (TREE_PURPOSE (t
)
6024 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
6026 error ("default arguments are not allowed in declaration "
6027 "of friend template specialization %qD",
6034 error ("%<inline%> is not allowed in declaration of friend "
6035 "template specialization %qD",
6042 /* If this decl has namespace scope, set that up. */
6044 set_decl_namespace (decl
, in_namespace
, friendp
);
6046 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
6048 /* `main' and builtins have implicit 'C' linkage. */
6049 if ((MAIN_NAME_P (declarator
)
6050 || (IDENTIFIER_LENGTH (declarator
) > 10
6051 && IDENTIFIER_POINTER (declarator
)[0] == '_'
6052 && IDENTIFIER_POINTER (declarator
)[1] == '_'
6053 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
6054 && current_lang_name
== lang_name_cplusplus
6055 && ctype
== NULL_TREE
6056 /* NULL_TREE means global namespace. */
6057 && DECL_CONTEXT (decl
) == NULL_TREE
)
6058 SET_DECL_LANGUAGE (decl
, lang_c
);
6060 /* Should probably propagate const out from type to decl I bet (mrs). */
6063 DECL_STATIC_FUNCTION_P (decl
) = 1;
6064 DECL_CONTEXT (decl
) = ctype
;
6069 DECL_CONTEXT (decl
) = ctype
;
6071 check_class_member_definition_namespace (decl
);
6074 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
6076 if (processing_template_decl
)
6077 error ("cannot declare %<::main%> to be a template");
6079 error ("cannot declare %<::main%> to be inline");
6081 error ("cannot declare %<::main%> to be static");
6086 /* Members of anonymous types and local classes have no linkage; make
6087 them internal. If a typedef is made later, this will be changed. */
6088 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
6089 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
6094 /* [basic.link]: A name with no linkage (notably, the name of a class
6095 or enumeration declared in a local scope) shall not be used to
6096 declare an entity with linkage.
6098 Only check this for public decls for now. See core 319, 389. */
6099 t
= no_linkage_check (TREE_TYPE (decl
),
6100 /*relaxed_p=*/false);
6103 if (TYPE_ANONYMOUS_P (t
))
6105 if (DECL_EXTERN_C_P (decl
))
6106 /* Allow this; it's pretty common in C. */;
6109 pedwarn ("non-local function %q#D uses anonymous type",
6111 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
6112 pedwarn ("%q+#D does not refer to the unqualified "
6113 "type, so it is not used for linkage",
6118 pedwarn ("non-local function %q#D uses local type %qT", decl
, t
);
6122 TREE_PUBLIC (decl
) = publicp
;
6125 DECL_INTERFACE_KNOWN (decl
) = 1;
6126 DECL_NOT_REALLY_EXTERN (decl
) = 1;
6129 /* If the declaration was declared inline, mark it as such. */
6131 DECL_DECLARED_INLINE_P (decl
) = 1;
6132 /* We inline functions that are explicitly declared inline, or, when
6133 the user explicitly asks us to, all functions. */
6134 if (DECL_DECLARED_INLINE_P (decl
)
6135 || (flag_inline_trees
== 2 && !DECL_INLINE (decl
) && funcdef_flag
))
6136 DECL_INLINE (decl
) = 1;
6138 DECL_EXTERNAL (decl
) = 1;
6139 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
6142 ? G_("static member function %qD cannot have cv-qualifier")
6143 : G_("non-member function %qD cannot have cv-qualifier"),
6145 quals
= TYPE_UNQUALIFIED
;
6148 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
6149 && !grok_op_properties (decl
, /*complain=*/true))
6152 if (ctype
&& decl_function_context (decl
))
6153 DECL_NO_STATIC_CHAIN (decl
) = 1;
6156 /* Make the init_value nonzero so pushdecl knows this is not
6157 tentative. error_mark_node is replaced later with the BLOCK. */
6158 DECL_INITIAL (decl
) = error_mark_node
;
6160 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
6161 TREE_NOTHROW (decl
) = 1;
6163 /* Caller will do the rest of this. */
6167 if (ctype
!= NULL_TREE
)
6169 if (sfk
== sfk_constructor
)
6170 DECL_CONSTRUCTOR_P (decl
) = 1;
6172 grokclassfn (ctype
, decl
, flags
);
6175 decl
= check_explicit_specialization (orig_declarator
, decl
,
6178 4 * (friendp
!= 0));
6179 if (decl
== error_mark_node
)
6184 cplus_decl_attributes (&decl
, *attrlist
, 0);
6185 *attrlist
= NULL_TREE
;
6188 /* Check main's type after attributes have been applied. */
6189 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
6191 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
6194 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
6196 error ("%<::main%> must return %<int%>");
6197 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
6198 TREE_TYPE (decl
) = newtype
;
6200 check_main_parameter_types (decl
);
6203 if (ctype
!= NULL_TREE
6204 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
6209 old_decl
= check_classfn (ctype
, decl
,
6210 (processing_template_decl
6211 > template_class_depth (ctype
))
6212 ? current_template_parms
6219 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
6220 /* Because grokfndecl is always supposed to return a
6221 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6222 here. We depend on our callers to figure out that its
6223 really a template that's being returned. */
6224 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
6226 if (DECL_STATIC_FUNCTION_P (old_decl
)
6227 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
6228 /* Remove the `this' parm added by grokclassfn.
6229 XXX Isn't this done in start_function, too? */
6230 revert_static_member_fn (decl
);
6231 if (DECL_ARTIFICIAL (old_decl
))
6232 error ("definition of implicitly-declared %qD", old_decl
);
6234 /* Since we've smashed OLD_DECL to its
6235 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6236 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
6237 decl
= DECL_TEMPLATE_RESULT (decl
);
6239 /* Attempt to merge the declarations. This can fail, in
6240 the case of some invalid specialization declarations. */
6241 pushed_scope
= push_scope (ctype
);
6242 ok
= duplicate_decls (decl
, old_decl
, friendp
);
6244 pop_scope (pushed_scope
);
6247 error ("no %q#D member function declared in class %qT",
6255 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
6258 if (ctype
== NULL_TREE
|| check
)
6262 DECL_VIRTUAL_P (decl
) = 1;
6267 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6268 the linkage that DECL will receive in the object file. */
6271 set_linkage_for_static_data_member (tree decl
)
6273 /* A static data member always has static storage duration and
6274 external linkage. Note that static data members are forbidden in
6275 local classes -- the only situation in which a class has
6276 non-external linkage. */
6277 TREE_PUBLIC (decl
) = 1;
6278 TREE_STATIC (decl
) = 1;
6279 /* For non-template classes, static data members are always put
6280 out in exactly those files where they are defined, just as
6281 with ordinary namespace-scope variables. */
6282 if (!processing_template_decl
)
6283 DECL_INTERFACE_KNOWN (decl
) = 1;
6286 /* Create a VAR_DECL named NAME with the indicated TYPE.
6288 If SCOPE is non-NULL, it is the class type or namespace containing
6289 the variable. If SCOPE is NULL, the variable should is created in
6290 the innermost enclosings scope. */
6293 grokvardecl (tree type
,
6295 const cp_decl_specifier_seq
*declspecs
,
6301 tree explicit_scope
;
6303 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
6305 /* Compute the scope in which to place the variable, but remember
6306 whether or not that scope was explicitly specified by the user. */
6307 explicit_scope
= scope
;
6310 /* An explicit "extern" specifier indicates a namespace-scope
6312 if (declspecs
->storage_class
== sc_extern
)
6313 scope
= current_namespace
;
6314 else if (!at_function_scope_p ())
6315 scope
= current_scope ();
6319 && (/* If the variable is a namespace-scope variable declared in a
6320 template, we need DECL_LANG_SPECIFIC. */
6321 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
6322 /* Similarly for namespace-scope variables with language linkage
6324 || (TREE_CODE (scope
) == NAMESPACE_DECL
6325 && current_lang_name
!= lang_name_cplusplus
)
6326 /* Similarly for static data members. */
6328 decl
= build_lang_decl (VAR_DECL
, name
, type
);
6330 decl
= build_decl (VAR_DECL
, name
, type
);
6332 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
6333 set_decl_namespace (decl
, explicit_scope
, 0);
6335 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
6337 if (declspecs
->storage_class
== sc_extern
)
6339 DECL_THIS_EXTERN (decl
) = 1;
6340 DECL_EXTERNAL (decl
) = !initialized
;
6343 if (DECL_CLASS_SCOPE_P (decl
))
6345 set_linkage_for_static_data_member (decl
);
6346 /* This function is only called with out-of-class definitions. */
6347 DECL_EXTERNAL (decl
) = 0;
6348 check_class_member_definition_namespace (decl
);
6350 /* At top level, either `static' or no s.c. makes a definition
6351 (perhaps tentative), and absence of `static' makes it public. */
6352 else if (toplevel_bindings_p ())
6354 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
6355 && (DECL_THIS_EXTERN (decl
) || ! constp
));
6356 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
6358 /* Not at top level, only `static' makes a static definition. */
6361 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
6362 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
6365 if (declspecs
->specs
[(int)ds_thread
])
6366 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
6368 if (TREE_PUBLIC (decl
))
6370 /* [basic.link]: A name with no linkage (notably, the name of a class
6371 or enumeration declared in a local scope) shall not be used to
6372 declare an entity with linkage.
6374 Only check this for public decls for now. */
6375 tree t
= no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false);
6378 if (TYPE_ANONYMOUS_P (t
))
6380 if (DECL_EXTERN_C_P (decl
))
6381 /* Allow this; it's pretty common in C. */
6385 /* DRs 132, 319 and 389 seem to indicate types with
6386 no linkage can only be used to declare extern "C"
6387 entities. Since it's not always an error in the
6388 ISO C++ 90 Standard, we only issue a warning. */
6389 warning (0, "non-local variable %q#D uses anonymous type",
6391 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
6392 warning (0, "%q+#D does not refer to the unqualified "
6393 "type, so it is not used for linkage",
6398 warning (0, "non-local variable %q#D uses local type %qT", decl
, t
);
6402 DECL_INTERFACE_KNOWN (decl
) = 1;
6407 /* Create and return a canonical pointer to member function type, for
6408 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6411 build_ptrmemfunc_type (tree type
)
6415 tree unqualified_variant
= NULL_TREE
;
6417 if (type
== error_mark_node
)
6420 /* If a canonical type already exists for this type, use it. We use
6421 this method instead of type_hash_canon, because it only does a
6422 simple equality check on the list of field members. */
6424 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
6427 /* Make sure that we always have the unqualified pointer-to-member
6429 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6431 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
6433 t
= make_aggr_type (RECORD_TYPE
);
6434 xref_basetypes (t
, NULL_TREE
);
6436 /* Let the front end know this is a pointer to member function... */
6437 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
6438 /* ... and not really an aggregate. */
6439 SET_IS_AGGR_TYPE (t
, 0);
6441 field
= build_decl (FIELD_DECL
, pfn_identifier
, type
);
6444 field
= build_decl (FIELD_DECL
, delta_identifier
, delta_type_node
);
6445 TREE_CHAIN (field
) = fields
;
6448 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
6450 /* Zap out the name so that the back end will give us the debugging
6451 information for this anonymous RECORD_TYPE. */
6452 TYPE_NAME (t
) = NULL_TREE
;
6454 /* If this is not the unqualified form of this pointer-to-member
6455 type, set the TYPE_MAIN_VARIANT for this type to be the
6456 unqualified type. Since they are actually RECORD_TYPEs that are
6457 not variants of each other, we must do this manually. */
6458 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
6460 t
= build_qualified_type (t
, cp_type_quals (type
));
6461 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
6462 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
6463 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
6466 /* Cache this pointer-to-member type so that we can find it again
6468 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
6470 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
6471 SET_TYPE_STRUCTURAL_EQUALITY (t
);
6472 else if (TYPE_CANONICAL (type
) != type
)
6473 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
6478 /* Create and return a pointer to data member type. */
6481 build_ptrmem_type (tree class_type
, tree member_type
)
6483 if (TREE_CODE (member_type
) == METHOD_TYPE
)
6487 arg_types
= TYPE_ARG_TYPES (member_type
);
6488 class_type
= (cp_build_qualified_type
6490 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types
)))));
6492 = build_method_type_directly (class_type
,
6493 TREE_TYPE (member_type
),
6494 TREE_CHAIN (arg_types
));
6495 return build_ptrmemfunc_type (build_pointer_type (member_type
));
6499 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
6500 return build_offset_type (class_type
, member_type
);
6504 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6505 Check to see that the definition is valid. Issue appropriate error
6506 messages. Return 1 if the definition is particularly bad, or 0
6510 check_static_variable_definition (tree decl
, tree type
)
6512 /* Motion 10 at San Diego: If a static const integral data member is
6513 initialized with an integral constant expression, the initializer
6514 may appear either in the declaration (within the class), or in
6515 the definition, but not both. If it appears in the class, the
6516 member is a member constant. The file-scope definition is always
6518 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
6520 error ("invalid in-class initialization of static data member "
6521 "of non-integral type %qT",
6523 /* If we just return the declaration, crashes will sometimes
6524 occur. We therefore return void_type_node, as if this were a
6525 friend declaration, to cause callers to completely ignore
6526 this declaration. */
6529 else if (!CP_TYPE_CONST_P (type
))
6530 error ("ISO C++ forbids in-class initialization of non-const "
6531 "static member %qD",
6533 else if (pedantic
&& !INTEGRAL_TYPE_P (type
))
6534 pedwarn ("ISO C++ forbids initialization of member constant "
6535 "%qD of non-integral type %qT", decl
, type
);
6540 /* Given the SIZE (i.e., number of elements) in an array, compute an
6541 appropriate index type for the array. If non-NULL, NAME is the
6542 name of the thing being declared. */
6545 compute_array_index_type (tree name
, tree size
)
6549 tree abi_1_itype
= NULL_TREE
;
6551 if (error_operand_p (size
))
6552 return error_mark_node
;
6554 type
= TREE_TYPE (size
);
6555 /* The array bound must be an integer type. */
6556 if (!dependent_type_p (type
) && !INTEGRAL_TYPE_P (type
))
6559 error ("size of array %qD has non-integral type %qT", name
, type
);
6561 error ("size of array has non-integral type %qT", type
);
6562 size
= integer_one_node
;
6563 type
= TREE_TYPE (size
);
6566 if (value_dependent_expression_p (size
))
6568 /* We cannot do any checking for a value-dependent SIZE. Just
6569 build the index type and mark that it requires structural
6571 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
6572 size
, integer_one_node
));
6573 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
6577 if (!abi_version_at_least (2) && processing_template_decl
)
6578 /* For abi-1, we handled all instances in templates the same way,
6579 even when they were non-dependent. This effects the manglings
6580 produced. So, we do the normal checking for non-dependent
6581 sizes, but at the end we'll return the same type that abi-1
6582 would have, but with TYPE_CANONICAL set to the "right"
6583 value that the current ABI would provide. */
6584 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
6585 size
, integer_one_node
));
6587 /* The size might be the result of a cast. */
6588 STRIP_TYPE_NOPS (size
);
6590 /* It might be a const variable or enumeration constant. */
6591 size
= integral_constant_value (size
);
6593 /* Normally, the array-bound will be a constant. */
6594 if (TREE_CODE (size
) == INTEGER_CST
)
6596 /* Check to see if the array bound overflowed. Make that an
6597 error, no matter how generous we're being. */
6598 int old_flag_pedantic_errors
= flag_pedantic_errors
;
6599 int old_pedantic
= pedantic
;
6600 pedantic
= flag_pedantic_errors
= 1;
6601 constant_expression_warning (size
);
6602 pedantic
= old_pedantic
;
6603 flag_pedantic_errors
= old_flag_pedantic_errors
;
6605 /* An array must have a positive number of elements. */
6606 if (INT_CST_LT (size
, integer_zero_node
))
6609 error ("size of array %qD is negative", name
);
6611 error ("size of array is negative");
6612 size
= integer_one_node
;
6614 /* As an extension we allow zero-sized arrays. We always allow
6615 them in system headers because glibc uses them. */
6616 else if (integer_zerop (size
) && pedantic
&& !in_system_header
)
6619 pedwarn ("ISO C++ forbids zero-size array %qD", name
);
6621 pedwarn ("ISO C++ forbids zero-size array");
6624 else if (TREE_CONSTANT (size
))
6626 /* `(int) &fn' is not a valid array bound. */
6628 error ("size of array %qD is not an integral constant-expression",
6631 error ("size of array is not an integral constant-expression");
6632 size
= integer_one_node
;
6637 pedwarn ("ISO C++ forbids variable-size array %qD", name
);
6639 pedwarn ("ISO C++ forbids variable-size array");
6642 if (processing_template_decl
&& !TREE_CONSTANT (size
))
6643 /* A variable sized array. */
6644 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
6647 HOST_WIDE_INT saved_processing_template_decl
;
6649 /* Compute the index of the largest element in the array. It is
6650 one less than the number of elements in the array. We save
6651 and restore PROCESSING_TEMPLATE_DECL so that computations in
6652 cp_build_binary_op will be appropriately folded. */
6653 saved_processing_template_decl
= processing_template_decl
;
6654 processing_template_decl
= 0;
6655 itype
= cp_build_binary_op (MINUS_EXPR
,
6656 cp_convert (ssizetype
, size
),
6657 cp_convert (ssizetype
, integer_one_node
));
6658 itype
= fold (itype
);
6659 processing_template_decl
= saved_processing_template_decl
;
6661 if (!TREE_CONSTANT (itype
))
6662 /* A variable sized array. */
6663 itype
= variable_size (itype
);
6664 /* Make sure that there was no overflow when creating to a signed
6665 index type. (For example, on a 32-bit machine, an array with
6666 size 2^32 - 1 is too big.) */
6667 else if (TREE_CODE (itype
) == INTEGER_CST
6668 && TREE_OVERFLOW (itype
))
6670 error ("overflow in array dimension");
6671 TREE_OVERFLOW (itype
) = 0;
6675 /* Create and return the appropriate index type. */
6678 tree t
= build_index_type (itype
);
6679 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
6683 return build_index_type (itype
);
6686 /* Returns the scope (if any) in which the entity declared by
6687 DECLARATOR will be located. If the entity was declared with an
6688 unqualified name, NULL_TREE is returned. */
6691 get_scope_of_declarator (const cp_declarator
*declarator
)
6693 while (declarator
&& declarator
->kind
!= cdk_id
)
6694 declarator
= declarator
->declarator
;
6696 /* If the declarator-id is a SCOPE_REF, the scope in which the
6697 declaration occurs is the first operand. */
6699 && declarator
->u
.id
.qualifying_scope
)
6700 return declarator
->u
.id
.qualifying_scope
;
6702 /* Otherwise, the declarator is not a qualified name; the entity will
6703 be declared in the current scope. */
6707 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6708 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6712 create_array_type_for_decl (tree name
, tree type
, tree size
)
6714 tree itype
= NULL_TREE
;
6715 const char* error_msg
;
6717 /* If things have already gone awry, bail now. */
6718 if (type
== error_mark_node
|| size
== error_mark_node
)
6719 return error_mark_node
;
6721 /* Assume that everything will go OK. */
6724 /* There are some types which cannot be array elements. */
6725 switch (TREE_CODE (type
))
6728 error_msg
= "array of void";
6732 error_msg
= "array of functions";
6735 case REFERENCE_TYPE
:
6736 error_msg
= "array of references";
6740 error_msg
= "array of function members";
6747 /* If something went wrong, issue an error-message and return. */
6751 error ("declaration of %qD as %s", name
, error_msg
);
6753 error ("creating %s", error_msg
);
6755 return error_mark_node
;
6760 The constant expressions that specify the bounds of the arrays
6761 can be omitted only for the first member of the sequence. */
6762 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
6765 error ("declaration of %qD as multidimensional array must "
6766 "have bounds for all dimensions except the first",
6769 error ("multidimensional array must have bounds for all "
6770 "dimensions except the first");
6772 return error_mark_node
;
6775 /* Figure out the index type for the array. */
6777 itype
= compute_array_index_type (name
, size
);
6780 T is called the array element type; this type shall not be [...] an
6781 abstract class type. */
6782 abstract_virtuals_error (name
, type
);
6784 return build_cplus_array_type (type
, itype
);
6787 /* Check that it's OK to declare a function with the indicated TYPE.
6788 SFK indicates the kind of special function (if any) that this
6789 function is. OPTYPE is the type given in a conversion operator
6790 declaration, or the class type for a constructor/destructor.
6791 Returns the actual return type of the function; that
6792 may be different than TYPE if an error occurs, or for certain
6793 special functions. */
6796 check_special_function_return_type (special_function_kind sfk
,
6802 case sfk_constructor
:
6804 error ("return type specification for constructor invalid");
6806 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
6807 type
= build_pointer_type (optype
);
6809 type
= void_type_node
;
6812 case sfk_destructor
:
6814 error ("return type specification for destructor invalid");
6815 /* We can't use the proper return type here because we run into
6816 problems with ambiguous bases and covariant returns.
6817 Java classes are left unchanged because (void *) isn't a valid
6818 Java type, and we don't want to change the Java ABI. */
6819 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
6820 type
= build_pointer_type (void_type_node
);
6822 type
= void_type_node
;
6825 case sfk_conversion
:
6826 if (type
&& !same_type_p (type
, optype
))
6827 error ("operator %qT declared to return %qT", optype
, type
);
6829 pedwarn ("return type specified for %<operator %T%>", optype
);
6840 /* A variable or data member (whose unqualified name is IDENTIFIER)
6841 has been declared with the indicated TYPE. If the TYPE is not
6842 acceptable, issue an error message and return a type to use for
6843 error-recovery purposes. */
6846 check_var_type (tree identifier
, tree type
)
6848 if (VOID_TYPE_P (type
))
6851 error ("unnamed variable or field declared void");
6852 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
6854 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
6855 error ("variable or field %qE declared void", identifier
);
6858 error ("variable or field declared void");
6859 type
= error_mark_node
;
6865 /* Given declspecs and a declarator (abstract or otherwise), determine
6866 the name and type of the object declared and construct a DECL node
6869 DECLSPECS points to the representation of declaration-specifier
6870 sequence that precedes declarator.
6872 DECL_CONTEXT says which syntactic context this declaration is in:
6873 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6874 FUNCDEF for a function definition. Like NORMAL but a few different
6875 error messages in each case. Return value may be zero meaning
6876 this definition is too screwy to try to parse.
6877 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6878 handle member functions (which have FIELD context).
6879 Return value may be zero meaning this definition is too screwy to
6881 PARM for a parameter declaration (either within a function prototype
6882 or before a function body). Make a PARM_DECL, or return void_type_node.
6883 CATCHPARM for a parameter declaration before a catch clause.
6884 TYPENAME if for a typename (in a cast or sizeof).
6885 Don't make a DECL node; just return the ..._TYPE node.
6886 FIELD for a struct or union field; make a FIELD_DECL.
6887 BITFIELD for a field with specified width.
6888 INITIALIZED is 1 if the decl has an initializer.
6890 ATTRLIST is a pointer to the list of attributes, which may be NULL
6891 if there are none; *ATTRLIST may be modified if attributes from inside
6892 the declarator should be applied to the declaration.
6894 When this function is called, scoping variables (such as
6895 CURRENT_CLASS_TYPE) should reflect the scope in which the
6896 declaration occurs, not the scope in which the new declaration will
6897 be placed. For example, on:
6901 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6904 Returns a DECL (if a declarator is present), a TYPE (if there is no
6905 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6909 grokdeclarator (const cp_declarator
*declarator
,
6910 const cp_decl_specifier_seq
*declspecs
,
6911 enum decl_context decl_context
,
6915 tree type
= NULL_TREE
;
6917 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
6918 int explicit_int
= 0;
6919 int explicit_char
= 0;
6920 int defaulted_int
= 0;
6921 tree dependent_name
= NULL_TREE
;
6923 tree typedef_decl
= NULL_TREE
;
6924 const char *name
= NULL
;
6925 tree typedef_type
= NULL_TREE
;
6926 /* True if this declarator is a function definition. */
6927 bool funcdef_flag
= false;
6928 cp_declarator_kind innermost_code
= cdk_error
;
6931 /* See the code below that used this. */
6932 tree decl_attr
= NULL_TREE
;
6935 /* Keep track of what sort of function is being processed
6936 so that we can warn about default return values, or explicit
6937 return values which do not match prescribed defaults. */
6938 special_function_kind sfk
= sfk_none
;
6940 tree dname
= NULL_TREE
;
6941 tree ctor_return_type
= NULL_TREE
;
6942 enum overload_flags flags
= NO_SPECIAL
;
6943 /* cv-qualifiers that apply to the declarator, for a declaration of
6944 a member function. */
6945 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
6946 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
6948 tree raises
= NULL_TREE
;
6949 int template_count
= 0;
6950 tree returned_attrs
= NULL_TREE
;
6951 tree parms
= NULL_TREE
;
6952 const cp_declarator
*id_declarator
;
6953 /* The unqualified name of the declarator; either an
6954 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6955 tree unqualified_id
;
6956 /* The class type, if any, in which this entity is located,
6957 or NULL_TREE if none. Note that this value may be different from
6958 the current class type; for example if an attempt is made to declare
6959 "A::f" inside "B", this value will be "A". */
6960 tree ctype
= current_class_type
;
6961 /* The NAMESPACE_DECL for the namespace in which this entity is
6962 located. If an unqualified name is used to declare the entity,
6963 this value will be NULL_TREE, even if the entity is located at
6965 tree in_namespace
= NULL_TREE
;
6966 cp_storage_class storage_class
;
6967 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
6968 bool type_was_error_mark_node
= false;
6969 bool set_no_warning
= false;
6971 signed_p
= declspecs
->specs
[(int)ds_signed
];
6972 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
6973 short_p
= declspecs
->specs
[(int)ds_short
];
6974 long_p
= declspecs
->specs
[(int)ds_long
];
6975 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
6976 thread_p
= declspecs
->specs
[(int)ds_thread
];
6978 if (decl_context
== FUNCDEF
)
6979 funcdef_flag
= true, decl_context
= NORMAL
;
6980 else if (decl_context
== MEMFUNCDEF
)
6981 funcdef_flag
= true, decl_context
= FIELD
;
6982 else if (decl_context
== BITFIELD
)
6983 bitfield
= 1, decl_context
= FIELD
;
6985 /* Look inside a declarator for the name being declared
6986 and get it as a string, for an error message. */
6987 for (id_declarator
= declarator
;
6989 id_declarator
= id_declarator
->declarator
)
6991 if (id_declarator
->kind
!= cdk_id
)
6992 innermost_code
= id_declarator
->kind
;
6994 switch (id_declarator
->kind
)
6997 if (id_declarator
->declarator
6998 && id_declarator
->declarator
->kind
== cdk_id
)
7000 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
7001 if (sfk
== sfk_destructor
)
7008 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
7009 tree decl
= id_declarator
->u
.id
.unqualified_name
;
7012 if (qualifying_scope
)
7014 if (at_function_scope_p ())
7018 A declarator-id shall not be qualified except
7021 None of the cases are permitted in block
7023 if (qualifying_scope
== global_namespace
)
7024 error ("invalid use of qualified-name %<::%D%>",
7026 else if (TYPE_P (qualifying_scope
))
7027 error ("invalid use of qualified-name %<%T::%D%>",
7028 qualifying_scope
, decl
);
7030 error ("invalid use of qualified-name %<%D::%D%>",
7031 qualifying_scope
, decl
);
7032 return error_mark_node
;
7034 else if (TYPE_P (qualifying_scope
))
7036 ctype
= qualifying_scope
;
7037 if (innermost_code
!= cdk_function
7038 && current_class_type
7039 && !UNIQUELY_DERIVED_FROM_P (ctype
,
7040 current_class_type
))
7042 error ("type %qT is not derived from type %qT",
7043 ctype
, current_class_type
);
7044 return error_mark_node
;
7047 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
7048 in_namespace
= qualifying_scope
;
7050 switch (TREE_CODE (decl
))
7056 if (innermost_code
!= cdk_function
)
7058 error ("declaration of %qD as non-function", decl
);
7059 return error_mark_node
;
7061 else if (!qualifying_scope
7062 && !(current_class_type
&& at_class_scope_p ()))
7064 error ("declaration of %qD as non-member", decl
);
7065 return error_mark_node
;
7068 type
= TREE_OPERAND (decl
, 0);
7069 name
= IDENTIFIER_POINTER (constructor_name (type
));
7074 case TEMPLATE_ID_EXPR
:
7076 tree fns
= TREE_OPERAND (decl
, 0);
7079 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
7081 gcc_assert (is_overloaded_fn (dname
));
7082 dname
= DECL_NAME (get_first_fn (dname
));
7087 case IDENTIFIER_NODE
:
7088 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
7091 if (C_IS_RESERVED_WORD (dname
))
7093 error ("declarator-id missing; using reserved word %qD",
7095 name
= IDENTIFIER_POINTER (dname
);
7097 else if (!IDENTIFIER_TYPENAME_P (dname
))
7098 name
= IDENTIFIER_POINTER (dname
);
7101 gcc_assert (flags
== NO_SPECIAL
);
7102 flags
= TYPENAME_FLAG
;
7103 ctor_return_type
= TREE_TYPE (dname
);
7104 sfk
= sfk_conversion
;
7105 if (is_typename_at_global_scope (dname
))
7106 name
= IDENTIFIER_POINTER (dname
);
7108 name
= "<invalid operator>";
7124 return error_mark_node
;
7130 if (id_declarator
->kind
== cdk_id
)
7136 The declarator in a function-definition shall have the form
7137 D1 ( parameter-declaration-clause) ... */
7138 if (funcdef_flag
&& innermost_code
!= cdk_function
)
7140 error ("function definition does not declare parameters");
7141 return error_mark_node
;
7144 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
7145 && innermost_code
!= cdk_function
7146 && ! (ctype
&& !declspecs
->any_specifiers_p
))
7148 error ("declaration of %qD as non-function", dname
);
7149 return error_mark_node
;
7152 /* Anything declared one level down from the top level
7153 must be one of the parameters of a function
7154 (because the body is at least two levels down). */
7156 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7157 by not allowing C++ class definitions to specify their parameters
7158 with xdecls (must be spec.d in the parmlist).
7160 Since we now wait to push a class scope until we are sure that
7161 we are in a legitimate method context, we must set oldcname
7162 explicitly (since current_class_name is not yet alive).
7164 We also want to avoid calling this a PARM if it is in a namespace. */
7166 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
7168 struct cp_binding_level
*b
= current_binding_level
;
7169 current_binding_level
= b
->level_chain
;
7170 if (current_binding_level
!= 0 && toplevel_bindings_p ())
7171 decl_context
= PARM
;
7172 current_binding_level
= b
;
7176 name
= decl_context
== PARM
? "parameter" : "type name";
7178 /* If there were multiple types specified in the decl-specifier-seq,
7179 issue an error message. */
7180 if (declspecs
->multiple_types_p
)
7182 error ("two or more data types in declaration of %qs", name
);
7183 return error_mark_node
;
7186 /* Extract the basic type from the decl-specifier-seq. */
7187 type
= declspecs
->type
;
7188 if (type
== error_mark_node
)
7191 type_was_error_mark_node
= true;
7193 /* If the entire declaration is itself tagged as deprecated then
7194 suppress reports of deprecated items. */
7195 if (type
&& TREE_DEPRECATED (type
)
7196 && deprecated_state
!= DEPRECATED_SUPPRESS
)
7197 warn_deprecated_use (type
);
7198 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
7200 typedef_decl
= type
;
7201 type
= TREE_TYPE (typedef_decl
);
7203 /* No type at all: default to `int', and set DEFAULTED_INT
7204 because it was not a user-defined typedef. */
7205 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
7207 /* These imply 'int'. */
7208 type
= integer_type_node
;
7212 explicit_int
= declspecs
->explicit_int_p
;
7213 explicit_char
= declspecs
->explicit_char_p
;
7216 /* See the code below that used this. */
7218 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
7220 typedef_type
= type
;
7223 if (sfk
!= sfk_conversion
)
7224 ctor_return_type
= ctype
;
7226 if (sfk
!= sfk_none
)
7227 type
= check_special_function_return_type (sfk
, type
,
7229 else if (type
== NULL_TREE
)
7235 /* We handle `main' specially here, because 'main () { }' is so
7236 common. With no options, it is allowed. With -Wreturn-type,
7237 it is a warning. It is only an error with -pedantic-errors. */
7238 is_main
= (funcdef_flag
7239 && dname
&& MAIN_NAME_P (dname
)
7240 && ctype
== NULL_TREE
7241 && in_namespace
== NULL_TREE
7242 && current_namespace
== global_namespace
);
7244 if (type_was_error_mark_node
)
7245 /* We've already issued an error, don't complain more. */;
7246 else if (in_system_header
|| flag_ms_extensions
)
7247 /* Allow it, sigh. */;
7248 else if (pedantic
|| ! is_main
)
7249 pedwarn ("ISO C++ forbids declaration of %qs with no type", name
);
7251 warning (OPT_Wreturn_type
,
7252 "ISO C++ forbids declaration of %qs with no type", name
);
7254 type
= integer_type_node
;
7259 /* Now process the modifiers that were specified
7260 and check for invalid combinations. */
7262 /* Long double is a special combination. */
7263 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
7266 type
= build_qualified_type (long_double_type_node
,
7267 cp_type_quals (type
));
7270 /* Check all other uses of type modifiers. */
7272 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
7276 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
7277 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
7278 else if (signed_p
&& unsigned_p
)
7279 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
7280 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
7281 error ("%<long long%> invalid for %qs", name
);
7282 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
7283 error ("%<long%> invalid for %qs", name
);
7284 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
7285 error ("%<short%> invalid for %qs", name
);
7286 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
7287 error ("%<long%> or %<short%> invalid for %qs", name
);
7288 else if ((long_p
|| short_p
) && explicit_char
)
7289 error ("%<long%> or %<short%> specified with char for %qs", name
);
7290 else if (long_p
&& short_p
)
7291 error ("%<long%> and %<short%> specified together for %qs", name
);
7295 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& pedantic
)
7297 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7299 if (flag_pedantic_errors
)
7304 /* Discard the type modifiers if they are invalid. */
7315 /* Decide whether an integer type is signed or not.
7316 Optionally treat bitfields as signed by default. */
7320 It is implementation-defined whether a plain (neither
7321 explicitly signed or unsigned) char, short, int, or long
7322 bit-field is signed or unsigned.
7324 Naturally, we extend this to long long as well. Note that
7325 this does not include wchar_t. */
7326 || (bitfield
&& !flag_signed_bitfields
7328 /* A typedef for plain `int' without `signed' can be
7329 controlled just like plain `int', but a typedef for
7330 `signed int' cannot be so controlled. */
7332 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
7333 && TREE_CODE (type
) == INTEGER_TYPE
7334 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
7337 type
= long_long_unsigned_type_node
;
7339 type
= long_unsigned_type_node
;
7341 type
= short_unsigned_type_node
;
7342 else if (type
== char_type_node
)
7343 type
= unsigned_char_type_node
;
7344 else if (typedef_decl
)
7345 type
= c_common_unsigned_type (type
);
7347 type
= unsigned_type_node
;
7349 else if (signed_p
&& type
== char_type_node
)
7350 type
= signed_char_type_node
;
7352 type
= long_long_integer_type_node
;
7354 type
= long_integer_type_node
;
7356 type
= short_integer_type_node
;
7358 if (declspecs
->specs
[(int)ds_complex
])
7360 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
7361 error ("complex invalid for %qs", name
);
7362 /* If we just have "complex", it is equivalent to
7363 "complex double", but if any modifiers at all are specified it is
7364 the complex form of TYPE. E.g, "complex short" is
7365 "complex short int". */
7367 else if (defaulted_int
&& ! longlong
7368 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
7369 type
= complex_double_type_node
;
7370 else if (type
== integer_type_node
)
7371 type
= complex_integer_type_node
;
7372 else if (type
== float_type_node
)
7373 type
= complex_float_type_node
;
7374 else if (type
== double_type_node
)
7375 type
= complex_double_type_node
;
7376 else if (type
== long_double_type_node
)
7377 type
= complex_long_double_type_node
;
7379 type
= build_complex_type (type
);
7382 type_quals
= TYPE_UNQUALIFIED
;
7383 if (declspecs
->specs
[(int)ds_const
])
7384 type_quals
|= TYPE_QUAL_CONST
;
7385 if (declspecs
->specs
[(int)ds_volatile
])
7386 type_quals
|= TYPE_QUAL_VOLATILE
;
7387 if (declspecs
->specs
[(int)ds_restrict
])
7388 type_quals
|= TYPE_QUAL_RESTRICT
;
7389 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
7390 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7393 if (TREE_CODE (type
) == FUNCTION_TYPE
7394 && type_quals
!= TYPE_UNQUALIFIED
)
7396 /* This was an error in C++98 (cv-qualifiers cannot be added to
7397 a function type), but DR 295 makes the code well-formed by
7398 dropping the extra qualifiers. */
7401 tree bad_type
= build_qualified_type (type
, type_quals
);
7402 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7405 type_quals
= TYPE_UNQUALIFIED
;
7407 type_quals
|= cp_type_quals (type
);
7408 type
= cp_build_qualified_type_real
7409 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
7410 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
7411 /* We might have ignored or rejected some of the qualifiers. */
7412 type_quals
= cp_type_quals (type
);
7415 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
7416 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
7417 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
7419 storage_class
= declspecs
->storage_class
;
7420 if (storage_class
== sc_static
)
7421 staticp
= 1 + (decl_context
== FIELD
);
7423 if (virtualp
&& staticp
== 2)
7425 error ("member %qD cannot be declared both virtual and static", dname
);
7426 storage_class
= sc_none
;
7429 friendp
= !! declspecs
->specs
[(int)ds_friend
];
7431 if (dependent_name
&& !friendp
)
7433 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
7434 return error_mark_node
;
7437 /* Issue errors about use of storage classes for parameters. */
7438 if (decl_context
== PARM
)
7440 if (declspecs
->specs
[(int)ds_typedef
])
7442 error ("typedef declaration invalid in parameter declaration");
7443 return error_mark_node
;
7445 else if (storage_class
== sc_static
7446 || storage_class
== sc_extern
7448 error ("storage class specifiers invalid in parameter declarations");
7451 /* Give error if `virtual' is used outside of class declaration. */
7453 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
7455 error ("virtual outside class declaration");
7459 /* Static anonymous unions are dealt with here. */
7460 if (staticp
&& decl_context
== TYPENAME
7462 && ANON_AGGR_TYPE_P (declspecs
->type
))
7463 decl_context
= FIELD
;
7465 /* Warn about storage classes that are invalid for certain
7466 kinds of declarations (parameters, typenames, etc.). */
7469 && storage_class
!= sc_extern
7470 && storage_class
!= sc_static
)
7471 || declspecs
->specs
[(int)ds_typedef
]))
7473 error ("multiple storage classes in declaration of %qs", name
);
7476 if (declspecs
->conflicting_specifiers_p
)
7478 error ("conflicting specifiers in declaration of %qs", name
);
7479 storage_class
= sc_none
;
7481 else if (decl_context
!= NORMAL
7482 && ((storage_class
!= sc_none
7483 && storage_class
!= sc_mutable
)
7486 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
7487 && (storage_class
== sc_register
7488 || storage_class
== sc_auto
))
7490 else if (declspecs
->specs
[(int)ds_typedef
])
7492 else if (decl_context
== FIELD
7493 /* C++ allows static class elements. */
7494 && storage_class
== sc_static
)
7495 /* C++ also allows inlines and signed and unsigned elements,
7496 but in those cases we don't come in here. */
7500 if (decl_context
== FIELD
)
7501 error ("storage class specified for %qs", name
);
7504 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7505 error ("storage class specified for parameter %qs", name
);
7507 error ("storage class specified for typename");
7509 if (storage_class
== sc_register
7510 || storage_class
== sc_auto
7511 || storage_class
== sc_extern
7513 storage_class
= sc_none
;
7516 else if (storage_class
== sc_extern
&& initialized
7519 if (toplevel_bindings_p ())
7521 /* It's common practice (and completely valid) to have a const
7522 be initialized and declared extern. */
7523 if (!(type_quals
& TYPE_QUAL_CONST
))
7524 warning (0, "%qs initialized and declared %<extern%>", name
);
7527 error ("%qs has both %<extern%> and initializer", name
);
7529 else if (storage_class
== sc_extern
&& funcdef_flag
7530 && ! toplevel_bindings_p ())
7531 error ("nested function %qs declared %<extern%>", name
);
7532 else if (toplevel_bindings_p ())
7534 if (storage_class
== sc_auto
)
7535 error ("top-level declaration of %qs specifies %<auto%>", name
);
7538 && storage_class
!= sc_extern
7539 && storage_class
!= sc_static
)
7541 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7546 if (storage_class
&& friendp
)
7547 error ("storage class specifiers invalid in friend function declarations");
7550 unqualified_id
= NULL_TREE
;
7553 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
7554 switch (TREE_CODE (unqualified_id
))
7558 = constructor_name (TREE_OPERAND (unqualified_id
, 0));
7561 case IDENTIFIER_NODE
:
7562 case TEMPLATE_ID_EXPR
:
7570 /* Determine the type of the entity declared by recurring on the
7572 for (; declarator
; declarator
= declarator
->declarator
)
7574 const cp_declarator
*inner_declarator
;
7577 if (type
== error_mark_node
)
7578 return error_mark_node
;
7580 attrs
= declarator
->attributes
;
7586 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
7587 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
7588 if (declarator
->kind
== cdk_function
)
7589 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
7590 if (declarator
->kind
== cdk_array
)
7591 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
7592 returned_attrs
= decl_attributes (&type
,
7593 chainon (returned_attrs
, attrs
),
7597 if (declarator
->kind
== cdk_id
)
7600 inner_declarator
= declarator
->declarator
;
7602 switch (declarator
->kind
)
7605 type
= create_array_type_for_decl (dname
, type
,
7606 declarator
->u
.array
.bounds
);
7614 /* Declaring a function type.
7615 Make sure we have a valid type for the function to return. */
7617 if (type_quals
!= TYPE_UNQUALIFIED
)
7619 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
7620 warning (OPT_Wreturn_type
,
7621 "type qualifiers ignored on function return type");
7622 /* We now know that the TYPE_QUALS don't apply to the
7623 decl, but to its return type. */
7624 type_quals
= TYPE_UNQUALIFIED
;
7625 set_no_warning
= true;
7628 /* Warn about some types functions can't return. */
7630 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7632 error ("%qs declared as function returning a function", name
);
7633 type
= integer_type_node
;
7635 if (TREE_CODE (type
) == ARRAY_TYPE
)
7637 error ("%qs declared as function returning an array", name
);
7638 type
= integer_type_node
;
7641 /* Pick up type qualifiers which should be applied to `this'. */
7642 memfn_quals
= declarator
->u
.function
.qualifiers
;
7644 /* Pick up the exception specifications. */
7645 raises
= declarator
->u
.function
.exception_specification
;
7647 /* Say it's a definition only for the CALL_EXPR
7648 closest to the identifier. */
7649 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
7651 if (ctype
== NULL_TREE
7652 && decl_context
== FIELD
7654 && (friendp
== 0 || dname
== current_class_name
))
7655 ctype
= current_class_type
;
7657 if (ctype
&& (sfk
== sfk_constructor
7658 || sfk
== sfk_destructor
))
7660 /* We are within a class's scope. If our declarator name
7661 is the same as the class name, and we are defining
7662 a function, then it is a constructor/destructor, and
7663 therefore returns a void type. */
7665 /* ISO C++ 12.4/2. A destructor may not be declared
7666 const or volatile. A destructor may not be
7669 ISO C++ 12.1. A constructor may not be declared
7670 const or volatile. A constructor may not be
7671 virtual. A constructor may not be static. */
7673 error ((flags
== DTOR_FLAG
)
7674 ? "destructor cannot be static member function"
7675 : "constructor cannot be static member function");
7678 error ((flags
== DTOR_FLAG
)
7679 ? "destructors may not be cv-qualified"
7680 : "constructors may not be cv-qualified");
7681 memfn_quals
= TYPE_UNQUALIFIED
;
7684 if (decl_context
== FIELD
7685 && !member_function_or_else (ctype
,
7688 return error_mark_node
;
7690 if (flags
!= DTOR_FLAG
)
7692 /* It's a constructor. */
7697 pedwarn ("constructors cannot be declared virtual");
7700 if (decl_context
== FIELD
7701 && sfk
!= sfk_constructor
)
7702 return error_mark_node
;
7704 if (decl_context
== FIELD
)
7710 error ("can't initialize friend function %qs", name
);
7713 /* Cannot be both friend and virtual. */
7714 error ("virtual functions cannot be friends");
7717 if (decl_context
== NORMAL
)
7718 error ("friend declaration not in class definition");
7719 if (current_function_decl
&& funcdef_flag
)
7720 error ("can't define friend function %qs in a local "
7725 arg_types
= grokparms (declarator
->u
.function
.parameters
,
7728 if (inner_declarator
7729 && inner_declarator
->kind
== cdk_id
7730 && inner_declarator
->u
.id
.sfk
== sfk_destructor
7731 && arg_types
!= void_list_node
)
7733 error ("destructors may not have parameters");
7734 arg_types
= void_list_node
;
7738 type
= build_function_type (type
, arg_types
);
7745 /* Filter out pointers-to-references and references-to-references.
7746 We can get these if a TYPE_DECL is used. */
7748 if (TREE_CODE (type
) == REFERENCE_TYPE
)
7750 error (declarator
->kind
== cdk_reference
7751 ? "cannot declare reference to %q#T"
7752 : "cannot declare pointer to %q#T", type
);
7753 type
= TREE_TYPE (type
);
7755 else if (VOID_TYPE_P (type
))
7757 if (declarator
->kind
== cdk_reference
)
7758 error ("cannot declare reference to %q#T", type
);
7759 else if (declarator
->kind
== cdk_ptrmem
)
7760 error ("cannot declare pointer to %q#T member", type
);
7763 /* We now know that the TYPE_QUALS don't apply to the decl,
7764 but to the target of the pointer. */
7765 type_quals
= TYPE_UNQUALIFIED
;
7767 if (declarator
->kind
== cdk_ptrmem
7768 && (TREE_CODE (type
) == FUNCTION_TYPE
|| memfn_quals
))
7770 memfn_quals
|= cp_type_quals (type
);
7771 type
= build_memfn_type (type
,
7772 declarator
->u
.pointer
.class_type
,
7774 memfn_quals
= TYPE_UNQUALIFIED
;
7777 if (declarator
->kind
== cdk_reference
)
7779 if (!VOID_TYPE_P (type
))
7780 type
= build_reference_type (type
);
7782 else if (TREE_CODE (type
) == METHOD_TYPE
)
7783 type
= build_ptrmemfunc_type (build_pointer_type (type
));
7784 else if (declarator
->kind
== cdk_ptrmem
)
7786 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
7788 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
7789 /* We will already have complained. */
7790 type
= error_mark_node
;
7792 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
7796 type
= build_pointer_type (type
);
7798 /* Process a list of type modifier keywords (such as
7799 const or volatile) that were given inside the `*' or `&'. */
7801 if (declarator
->u
.pointer
.qualifiers
)
7804 = cp_build_qualified_type (type
,
7805 declarator
->u
.pointer
.qualifiers
);
7806 type_quals
= cp_type_quals (type
);
7819 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
7820 && TREE_CODE (type
) != FUNCTION_TYPE
7821 && TREE_CODE (type
) != METHOD_TYPE
)
7823 error ("template-id %qD used as a declarator",
7825 unqualified_id
= dname
;
7828 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7829 qualified with a class-name, turn it into a METHOD_TYPE, unless
7830 we know that the function is static. We take advantage of this
7831 opportunity to do other processing that pertains to entities
7832 explicitly declared to be class members. Note that if DECLARATOR
7833 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7834 would not have exited the loop above. */
7836 && declarator
->u
.id
.qualifying_scope
7837 && TYPE_P (declarator
->u
.id
.qualifying_scope
))
7841 ctype
= declarator
->u
.id
.qualifying_scope
;
7842 ctype
= TYPE_MAIN_VARIANT (ctype
);
7844 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
7846 /* You're supposed to have one `template <...>' for every
7847 template class, but you don't need one for a full
7848 specialization. For example:
7850 template <class T> struct S{};
7851 template <> struct S<int> { void f(); };
7852 void S<int>::f () {}
7854 is correct; there shouldn't be a `template <>' for the
7855 definition of `S<int>::f'. */
7856 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
7857 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
7858 /* T is an explicit (not partial) specialization. All
7859 containing classes must therefore also be explicitly
7862 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
7863 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
7864 template_count
+= 1;
7866 t
= TYPE_MAIN_DECL (t
);
7867 t
= DECL_CONTEXT (t
);
7870 if (ctype
== current_class_type
)
7873 pedwarn ("member functions are implicitly friends of their class");
7875 pedwarn ("extra qualification %<%T::%> on member %qs",
7878 else if (/* If the qualifying type is already complete, then we
7879 can skip the following checks. */
7880 !COMPLETE_TYPE_P (ctype
)
7881 && (/* If the function is being defined, then
7882 qualifying type must certainly be complete. */
7884 /* A friend declaration of "T::f" is OK, even if
7885 "T" is a template parameter. But, if this
7886 function is not a friend, the qualifying type
7888 || (!friendp
&& !CLASS_TYPE_P (ctype
))
7889 /* For a declaration, the type need not be
7890 complete, if either it is dependent (since there
7891 is no meaningful definition of complete in that
7892 case) or the qualifying class is currently being
7894 || !(dependent_type_p (ctype
)
7895 || currently_open_class (ctype
)))
7896 /* Check that the qualifying type is complete. */
7897 && !complete_type_or_else (ctype
, NULL_TREE
))
7898 return error_mark_node
;
7899 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7901 tree sname
= declarator
->u
.id
.unqualified_name
;
7903 if (current_class_type
7904 && (!friendp
|| funcdef_flag
))
7907 ? "cannot define member function %<%T::%s%> within %<%T%>"
7908 : "cannot declare member function %<%T::%s%> within %<%T%>",
7909 ctype
, name
, current_class_type
);
7910 return error_mark_node
;
7913 if (TREE_CODE (sname
) == IDENTIFIER_NODE
7914 && NEW_DELETE_OPNAME_P (sname
))
7915 /* Overloaded operator new and operator delete
7916 are always static functions. */
7919 type
= build_memfn_type (type
, ctype
, memfn_quals
);
7921 else if (declspecs
->specs
[(int)ds_typedef
]
7922 && current_class_type
)
7924 error ("cannot declare member %<%T::%s%> within %qT",
7925 ctype
, name
, current_class_type
);
7926 return error_mark_node
;
7930 /* Now TYPE has the actual type. */
7935 *attrlist
= chainon (returned_attrs
, *attrlist
);
7937 attrlist
= &returned_attrs
;
7940 /* Did array size calculations overflow? */
7942 if (TREE_CODE (type
) == ARRAY_TYPE
7943 && COMPLETE_TYPE_P (type
)
7944 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
7945 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
7947 error ("size of array %qs is too large", name
);
7948 /* If we proceed with the array type as it is, we'll eventually
7949 crash in tree_low_cst(). */
7950 type
= error_mark_node
;
7953 if ((decl_context
== FIELD
|| decl_context
== PARM
)
7954 && !processing_template_decl
7955 && variably_modified_type_p (type
, NULL_TREE
))
7957 if (decl_context
== FIELD
)
7958 error ("data member may not have variably modified type %qT", type
);
7960 error ("parameter may not have variably modified type %qT", type
);
7961 type
= error_mark_node
;
7964 if (explicitp
== 1 || (explicitp
&& friendp
))
7966 /* [dcl.fct.spec] The explicit specifier shall only be used in
7967 declarations of constructors within a class definition. */
7968 error ("only declarations of constructors can be %<explicit%>");
7972 if (storage_class
== sc_mutable
)
7974 if (decl_context
!= FIELD
|| friendp
)
7976 error ("non-member %qs cannot be declared %<mutable%>", name
);
7977 storage_class
= sc_none
;
7979 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
7981 error ("non-object member %qs cannot be declared %<mutable%>", name
);
7982 storage_class
= sc_none
;
7984 else if (TREE_CODE (type
) == FUNCTION_TYPE
7985 || TREE_CODE (type
) == METHOD_TYPE
)
7987 error ("function %qs cannot be declared %<mutable%>", name
);
7988 storage_class
= sc_none
;
7992 error ("static %qs cannot be declared %<mutable%>", name
);
7993 storage_class
= sc_none
;
7995 else if (type_quals
& TYPE_QUAL_CONST
)
7997 error ("const %qs cannot be declared %<mutable%>", name
);
7998 storage_class
= sc_none
;
8002 /* If this is declaring a typedef name, return a TYPE_DECL. */
8003 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
8007 /* Note that the grammar rejects storage classes
8008 in typenames, fields or parameters. */
8009 if (current_lang_name
== lang_name_java
)
8010 TYPE_FOR_JAVA (type
) = 1;
8012 /* This declaration:
8014 typedef void f(int) const;
8016 declares a function type which is not a member of any
8017 particular class, but which is cv-qualified; for
8018 example "f S::*" declares a pointer to a const-qualified
8019 member function of S. We record the cv-qualification in the
8021 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
8022 type
= cp_build_qualified_type (type
, memfn_quals
);
8024 if (decl_context
== FIELD
)
8025 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
8027 decl
= build_decl (TYPE_DECL
, unqualified_id
, type
);
8028 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
)
8029 error ("%Jtypedef name may not be a nested-name-specifier", decl
);
8031 if (decl_context
!= FIELD
)
8033 if (!current_function_decl
)
8034 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
8035 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
8036 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8037 (current_function_decl
)))
8038 /* The TYPE_DECL is "abstract" because there will be
8039 clones of this constructor/destructor, and there will
8040 be copies of this TYPE_DECL generated in those
8042 DECL_ABSTRACT (decl
) = 1;
8044 else if (constructor_name_p (unqualified_id
, current_class_type
))
8045 pedwarn ("ISO C++ forbids nested type %qD with same name "
8046 "as enclosing class",
8049 /* If the user declares "typedef struct {...} foo" then the
8050 struct will have an anonymous name. Fill that name in now.
8051 Nothing can refer to it, so nothing needs know about the name
8053 if (type
!= error_mark_node
8056 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
8057 && TYPE_ANONYMOUS_P (type
)
8058 /* Don't do this if there are attributes. */
8059 && (!attrlist
|| !*attrlist
)
8060 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
8062 tree oldname
= TYPE_NAME (type
);
8065 /* Replace the anonymous name with the real name everywhere. */
8066 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
8067 if (TYPE_NAME (t
) == oldname
)
8068 TYPE_NAME (t
) = decl
;
8070 if (TYPE_LANG_SPECIFIC (type
))
8071 TYPE_WAS_ANONYMOUS (type
) = 1;
8073 /* If this is a typedef within a template class, the nested
8074 type is a (non-primary) template. The name for the
8075 template needs updating as well. */
8076 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
8077 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
8078 = TYPE_IDENTIFIER (type
);
8080 /* FIXME remangle member functions; member functions of a
8081 type with external linkage have external linkage. */
8084 /* Any qualifiers on a function type typedef have already been
8086 if (memfn_quals
&& !ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
)
8087 memfn_quals
= TYPE_UNQUALIFIED
;
8090 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
8091 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
8093 bad_specifiers (decl
, "type", virtualp
,
8094 memfn_quals
!= TYPE_UNQUALIFIED
,
8095 inlinep
, friendp
, raises
!= NULL_TREE
);
8100 /* Detect the case of an array type of unspecified size
8101 which came, as such, direct from a typedef name.
8102 We must copy the type, so that the array's domain can be
8103 individually set by the object's initializer. */
8105 if (type
&& typedef_type
8106 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
8107 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
8108 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
8110 /* Detect where we're using a typedef of function type to declare a
8111 function. PARMS will not be set, so we must create it now. */
8113 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
8115 tree decls
= NULL_TREE
;
8118 for (args
= TYPE_ARG_TYPES (type
); args
; args
= TREE_CHAIN (args
))
8120 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
8122 TREE_CHAIN (decl
) = decls
;
8126 parms
= nreverse (decls
);
8128 if (decl_context
!= TYPENAME
)
8130 /* A cv-qualifier-seq shall only be part of the function type
8131 for a non-static member function. [8.3.5/4 dcl.fct] */
8132 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
8133 && (current_class_type
== NULL_TREE
|| staticp
) )
8136 ? G_("qualified function types cannot be used to "
8137 "declare static member functions")
8138 : G_("qualified function types cannot be used to "
8139 "declare free functions"));
8140 type
= TYPE_MAIN_VARIANT (type
);
8143 /* The qualifiers on the function type become the qualifiers on
8144 the non-static member function. */
8145 memfn_quals
|= cp_type_quals (type
);
8149 /* If this is a type name (such as, in a cast or sizeof),
8150 compute the type and return it now. */
8152 if (decl_context
== TYPENAME
)
8154 /* Note that the grammar rejects storage classes
8155 in typenames, fields or parameters. */
8156 if (type_quals
!= TYPE_UNQUALIFIED
)
8157 type_quals
= TYPE_UNQUALIFIED
;
8159 /* Special case: "friend class foo" looks like a TYPENAME context. */
8162 if (type_quals
!= TYPE_UNQUALIFIED
)
8164 error ("type qualifiers specified for friend class declaration");
8165 type_quals
= TYPE_UNQUALIFIED
;
8169 error ("%<inline%> specified for friend class declaration");
8175 /* Don't allow friend declaration without a class-key. */
8176 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
8177 pedwarn ("template parameters cannot be friends");
8178 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
8179 pedwarn ("friend declaration requires class-key, "
8180 "i.e. %<friend class %T::%D%>",
8181 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
8183 pedwarn ("friend declaration requires class-key, "
8184 "i.e. %<friend %#T%>",
8188 /* Only try to do this stuff if we didn't already give up. */
8189 if (type
!= integer_type_node
)
8191 /* A friendly class? */
8192 if (current_class_type
)
8193 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
8196 error ("trying to make class %qT a friend of global scope",
8199 type
= void_type_node
;
8202 else if (memfn_quals
)
8204 if (ctype
== NULL_TREE
)
8206 if (TREE_CODE (type
) != METHOD_TYPE
)
8207 error ("invalid qualifiers on non-member function type");
8209 ctype
= TYPE_METHOD_BASETYPE (type
);
8212 type
= build_memfn_type (type
, ctype
, memfn_quals
);
8217 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
8218 && decl_context
!= CATCHPARM
8219 && TREE_CODE (type
) != UNION_TYPE
8222 error ("abstract declarator %qT used as declaration", type
);
8223 return error_mark_node
;
8226 /* Only functions may be declared using an operator-function-id. */
8228 && IDENTIFIER_OPNAME_P (unqualified_id
)
8229 && TREE_CODE (type
) != FUNCTION_TYPE
8230 && TREE_CODE (type
) != METHOD_TYPE
)
8232 error ("declaration of %qD as non-function", unqualified_id
);
8233 return error_mark_node
;
8236 /* We don't check parameter types here because we can emit a better
8237 error message later. */
8238 if (decl_context
!= PARM
)
8240 type
= check_var_type (unqualified_id
, type
);
8241 if (type
== error_mark_node
)
8242 return error_mark_node
;
8245 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8246 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8248 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8250 if (ctype
|| in_namespace
)
8251 error ("cannot use %<::%> in parameter declaration");
8253 /* A parameter declared as an array of T is really a pointer to T.
8254 One declared as a function is really a pointer to a function.
8255 One declared as a member is really a pointer to member. */
8257 if (TREE_CODE (type
) == ARRAY_TYPE
)
8259 /* Transfer const-ness of array into that of type pointed to. */
8260 type
= build_pointer_type (TREE_TYPE (type
));
8261 type_quals
= TYPE_UNQUALIFIED
;
8263 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
8264 type
= build_pointer_type (type
);
8270 if (decl_context
== PARM
)
8272 decl
= cp_build_parm_decl (unqualified_id
, type
);
8274 bad_specifiers (decl
, "parameter", virtualp
,
8275 memfn_quals
!= TYPE_UNQUALIFIED
,
8276 inlinep
, friendp
, raises
!= NULL_TREE
);
8278 else if (decl_context
== FIELD
)
8280 /* The C99 flexible array extension. */
8281 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
8282 && TYPE_DOMAIN (type
) == NULL_TREE
)
8284 tree itype
= compute_array_index_type (dname
, integer_zero_node
);
8285 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
8288 if (type
== error_mark_node
)
8290 /* Happens when declaring arrays of sizes which
8291 are error_mark_node, for example. */
8294 else if (in_namespace
&& !friendp
)
8296 /* Something like struct S { int N::j; }; */
8297 error ("invalid use of %<::%>");
8298 return error_mark_node
;
8300 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
8303 tree function_context
;
8307 if (ctype
== NULL_TREE
)
8308 ctype
= current_class_type
;
8310 if (ctype
== NULL_TREE
)
8312 error ("can't make %qD into a method -- not in a class",
8314 return error_mark_node
;
8317 /* ``A union may [ ... ] not [ have ] virtual functions.''
8319 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
8321 error ("function %qD declared virtual inside a union",
8323 return error_mark_node
;
8326 if (NEW_DELETE_OPNAME_P (unqualified_id
))
8330 error ("%qD cannot be declared virtual, since it "
8336 else if (staticp
< 2)
8337 type
= build_memfn_type (type
, ctype
, memfn_quals
);
8340 /* Check that the name used for a destructor makes sense. */
8341 if (sfk
== sfk_destructor
)
8345 gcc_assert (friendp
);
8346 error ("expected qualified name in friend declaration "
8347 "for destructor %qD",
8348 id_declarator
->u
.id
.unqualified_name
);
8349 return error_mark_node
;
8352 if (!same_type_p (TREE_OPERAND
8353 (id_declarator
->u
.id
.unqualified_name
, 0),
8356 error ("declaration of %qD as member of %qT",
8357 id_declarator
->u
.id
.unqualified_name
, ctype
);
8358 return error_mark_node
;
8362 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8363 function_context
= (ctype
!= NULL_TREE
) ?
8364 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
8365 publicp
= (! friendp
|| ! staticp
)
8366 && function_context
== NULL_TREE
;
8367 decl
= grokfndecl (ctype
, type
,
8368 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
8369 ? unqualified_id
: dname
,
8372 virtualp
, flags
, memfn_quals
, raises
,
8373 friendp
? -1 : 0, friendp
, publicp
, inlinep
,
8375 funcdef_flag
, template_count
, in_namespace
, attrlist
);
8376 if (decl
== NULL_TREE
)
8377 return error_mark_node
;
8379 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8380 /* The decl and setting of decl_attr is also turned off. */
8381 decl
= build_decl_attribute_variant (decl
, decl_attr
);
8384 /* [class.conv.ctor]
8386 A constructor declared without the function-specifier
8387 explicit that can be called with a single parameter
8388 specifies a conversion from the type of its first
8389 parameter to the type of its class. Such a constructor
8390 is called a converting constructor. */
8392 DECL_NONCONVERTING_P (decl
) = 1;
8393 else if (DECL_CONSTRUCTOR_P (decl
))
8395 /* The constructor can be called with exactly one
8396 parameter if there is at least one parameter, and
8397 any subsequent parameters have default arguments.
8398 Ignore any compiler-added parms. */
8399 tree arg_types
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
8401 if (arg_types
== void_list_node
8403 && TREE_CHAIN (arg_types
)
8404 && TREE_CHAIN (arg_types
) != void_list_node
8405 && !TREE_PURPOSE (TREE_CHAIN (arg_types
))))
8406 DECL_NONCONVERTING_P (decl
) = 1;
8409 else if (TREE_CODE (type
) == METHOD_TYPE
)
8411 /* We only get here for friend declarations of
8412 members of other classes. */
8413 /* All method decls are public, so tell grokfndecl to set
8414 TREE_PUBLIC, also. */
8415 decl
= grokfndecl (ctype
, type
,
8416 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
8417 ? unqualified_id
: dname
,
8420 virtualp
, flags
, memfn_quals
, raises
,
8421 friendp
? -1 : 0, friendp
, 1, 0, sfk
,
8422 funcdef_flag
, template_count
, in_namespace
,
8424 if (decl
== NULL_TREE
)
8425 return error_mark_node
;
8427 else if (!staticp
&& !dependent_type_p (type
)
8428 && !COMPLETE_TYPE_P (complete_type (type
))
8429 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
8432 error ("field %qD has incomplete type", unqualified_id
);
8434 error ("name %qT has incomplete type", type
);
8436 /* If we're instantiating a template, tell them which
8437 instantiation made the field's type be incomplete. */
8438 if (current_class_type
8439 && TYPE_NAME (current_class_type
)
8440 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type
))
8442 && declspecs
->type
== type
)
8443 error (" in instantiation of template %qT",
8444 current_class_type
);
8446 return error_mark_node
;
8452 error ("%qE is neither function nor member function; "
8453 "cannot be declared friend", unqualified_id
);
8461 /* Friends are treated specially. */
8462 if (ctype
== current_class_type
)
8463 ; /* We already issued a pedwarn. */
8464 else if (decl
&& DECL_NAME (decl
))
8466 if (template_class_depth (current_class_type
) == 0)
8468 decl
= check_explicit_specialization
8469 (unqualified_id
, decl
, template_count
,
8470 2 * funcdef_flag
+ 4);
8471 if (decl
== error_mark_node
)
8472 return error_mark_node
;
8475 decl
= do_friend (ctype
, unqualified_id
, decl
,
8481 return error_mark_node
;
8484 /* Structure field. It may not be a function, except for C++. */
8486 if (decl
== NULL_TREE
)
8492 /* An attempt is being made to initialize a non-static
8493 member. But, from [class.mem]:
8495 4 A member-declarator can contain a
8496 constant-initializer only if it declares a static
8497 member (_class.static_) of integral or enumeration
8498 type, see _class.static.data_.
8500 This used to be relatively common practice, but
8501 the rest of the compiler does not correctly
8502 handle the initialization unless the member is
8503 static so we make it static below. */
8504 pedwarn ("ISO C++ forbids initialization of member %qD",
8506 pedwarn ("making %qD static", unqualified_id
);
8510 if (uses_template_parms (type
))
8511 /* We'll check at instantiation time. */
8513 else if (check_static_variable_definition (unqualified_id
,
8515 /* If we just return the declaration, crashes
8516 will sometimes occur. We therefore return
8517 void_type_node, as if this was a friend
8518 declaration, to cause callers to completely
8519 ignore this declaration. */
8520 return error_mark_node
;
8525 /* C++ allows static class members. All other work
8526 for this is done by grokfield. */
8527 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
8528 set_linkage_for_static_data_member (decl
);
8529 /* Even if there is an in-class initialization, DECL
8530 is considered undefined until an out-of-class
8531 definition is provided. */
8532 DECL_EXTERNAL (decl
) = 1;
8535 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
8539 decl
= build_decl (FIELD_DECL
, unqualified_id
, type
);
8540 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
8541 if (storage_class
== sc_mutable
)
8543 DECL_MUTABLE_P (decl
) = 1;
8544 storage_class
= sc_none
;
8548 bad_specifiers (decl
, "field", virtualp
,
8549 memfn_quals
!= TYPE_UNQUALIFIED
,
8550 inlinep
, friendp
, raises
!= NULL_TREE
);
8553 else if (TREE_CODE (type
) == FUNCTION_TYPE
8554 || TREE_CODE (type
) == METHOD_TYPE
)
8559 if (!unqualified_id
)
8560 return error_mark_node
;
8562 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
8563 original_name
= dname
;
8565 original_name
= unqualified_id
;
8567 if (storage_class
== sc_auto
)
8568 error ("storage class %<auto%> invalid for function %qs", name
);
8569 else if (storage_class
== sc_register
)
8570 error ("storage class %<register%> invalid for function %qs", name
);
8572 error ("storage class %<__thread%> invalid for function %qs", name
);
8574 /* Function declaration not at top level.
8575 Storage classes other than `extern' are not allowed
8576 and `extern' makes no difference. */
8577 if (! toplevel_bindings_p ()
8578 && (storage_class
== sc_static
8579 || declspecs
->specs
[(int)ds_inline
])
8582 if (storage_class
== sc_static
)
8583 pedwarn ("%<static%> specified invalid for function %qs "
8584 "declared out of global scope", name
);
8586 pedwarn ("%<inline%> specifier invalid for function %qs "
8587 "declared out of global scope", name
);
8590 if (ctype
== NULL_TREE
)
8594 error ("virtual non-class function %qs", name
);
8598 else if (TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
8599 && !NEW_DELETE_OPNAME_P (original_name
))
8600 type
= build_method_type_directly (ctype
,
8602 TYPE_ARG_TYPES (type
));
8604 /* Record presence of `static'. */
8605 publicp
= (ctype
!= NULL_TREE
8606 || storage_class
== sc_extern
8607 || storage_class
!= sc_static
);
8609 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
8610 virtualp
, flags
, memfn_quals
, raises
,
8612 publicp
, inlinep
, sfk
, funcdef_flag
,
8613 template_count
, in_namespace
, attrlist
);
8614 if (decl
== NULL_TREE
)
8615 return error_mark_node
;
8619 int invalid_static
= 0;
8621 /* Don't allow a static member function in a class, and forbid
8622 declaring main to be static. */
8623 if (TREE_CODE (type
) == METHOD_TYPE
)
8625 pedwarn ("cannot declare member function %qD to have "
8626 "static linkage", decl
);
8629 else if (current_function_decl
)
8631 /* FIXME need arm citation */
8632 error ("cannot declare static function inside another function");
8639 storage_class
= sc_none
;
8645 /* It's a variable. */
8647 /* An uninitialized decl with `extern' is a reference. */
8648 decl
= grokvardecl (type
, unqualified_id
,
8651 (type_quals
& TYPE_QUAL_CONST
) != 0,
8652 ctype
? ctype
: in_namespace
);
8653 bad_specifiers (decl
, "variable", virtualp
,
8654 memfn_quals
!= TYPE_UNQUALIFIED
,
8655 inlinep
, friendp
, raises
!= NULL_TREE
);
8659 DECL_CONTEXT (decl
) = ctype
;
8662 pedwarn ("%<static%> may not be used when defining "
8663 "(as opposed to declaring) a static data member");
8665 storage_class
= sc_none
;
8667 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
8669 error ("static member %qD declared %<register%>", decl
);
8670 storage_class
= sc_none
;
8672 if (storage_class
== sc_extern
&& pedantic
)
8674 pedwarn ("cannot explicitly declare member %q#D to have "
8677 storage_class
= sc_none
;
8682 /* Record `register' declaration for warnings on &
8683 and in case doing stupid register allocation. */
8685 if (storage_class
== sc_register
)
8686 DECL_REGISTER (decl
) = 1;
8687 else if (storage_class
== sc_extern
)
8688 DECL_THIS_EXTERN (decl
) = 1;
8689 else if (storage_class
== sc_static
)
8690 DECL_THIS_STATIC (decl
) = 1;
8692 /* Record constancy and volatility. There's no need to do this
8693 when processing a template; we'll do this for the instantiated
8694 declaration based on the type of DECL. */
8695 if (!processing_template_decl
)
8696 cp_apply_type_quals_to_decl (type_quals
, decl
);
8699 TREE_NO_WARNING (decl
) = 1;
8705 /* Subroutine of start_function. Ensure that each of the parameter
8706 types (as listed in PARMS) is complete, as is required for a
8707 function definition. */
8710 require_complete_types_for_parms (tree parms
)
8712 for (; parms
; parms
= TREE_CHAIN (parms
))
8714 if (dependent_type_p (TREE_TYPE (parms
)))
8716 if (!VOID_TYPE_P (TREE_TYPE (parms
))
8717 && complete_type_or_else (TREE_TYPE (parms
), parms
))
8719 relayout_decl (parms
);
8720 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
8723 /* grokparms or complete_type_or_else will have already issued
8725 TREE_TYPE (parms
) = error_mark_node
;
8729 /* Returns nonzero if T is a local variable. */
8732 local_variable_p (tree t
)
8734 if ((TREE_CODE (t
) == VAR_DECL
8735 /* A VAR_DECL with a context that is a _TYPE is a static data
8737 && !TYPE_P (CP_DECL_CONTEXT (t
))
8738 /* Any other non-local variable must be at namespace scope. */
8739 && !DECL_NAMESPACE_SCOPE_P (t
))
8740 || (TREE_CODE (t
) == PARM_DECL
))
8746 /* Returns nonzero if T is an automatic local variable or a label.
8747 (These are the declarations that need to be remapped when the code
8748 containing them is duplicated.) */
8751 nonstatic_local_decl_p (tree t
)
8753 return ((local_variable_p (t
) && !TREE_STATIC (t
))
8754 || TREE_CODE (t
) == LABEL_DECL
8755 || TREE_CODE (t
) == RESULT_DECL
);
8758 /* Like local_variable_p, but suitable for use as a tree-walking
8762 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
8763 void *data ATTRIBUTE_UNUSED
)
8765 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
8767 else if (TYPE_P (*tp
))
8774 /* Check that ARG, which is a default-argument expression for a
8775 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8776 something goes wrong. DECL may also be a _TYPE node, rather than a
8777 DECL, if there is no DECL available. */
8780 check_default_argument (tree decl
, tree arg
)
8785 if (TREE_CODE (arg
) == DEFAULT_ARG
)
8786 /* We get a DEFAULT_ARG when looking at an in-class declaration
8787 with a default argument. Ignore the argument for now; we'll
8788 deal with it after the class is complete. */
8797 decl_type
= TREE_TYPE (decl
);
8799 if (arg
== error_mark_node
8800 || decl
== error_mark_node
8801 || TREE_TYPE (arg
) == error_mark_node
8802 || decl_type
== error_mark_node
)
8803 /* Something already went wrong. There's no need to check
8805 return error_mark_node
;
8807 /* [dcl.fct.default]
8809 A default argument expression is implicitly converted to the
8811 if (!TREE_TYPE (arg
)
8812 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
8815 error ("default argument for %q#D has type %qT",
8816 decl
, TREE_TYPE (arg
));
8818 error ("default argument for parameter of type %qT has type %qT",
8819 decl_type
, TREE_TYPE (arg
));
8821 return error_mark_node
;
8824 /* [dcl.fct.default]
8826 Local variables shall not be used in default argument
8829 The keyword `this' shall not be used in a default argument of a
8831 var
= walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
,
8835 error ("default argument %qE uses local variable %qD", arg
, var
);
8836 return error_mark_node
;
8843 /* Decode the list of parameter types for a function type.
8844 Given the list of things declared inside the parens,
8845 return a list of types.
8847 If this parameter does not end with an ellipsis, we append
8850 *PARMS is set to the chain of PARM_DECLs created. */
8853 grokparms (cp_parameter_declarator
*first_parm
, tree
*parms
)
8855 tree result
= NULL_TREE
;
8856 tree decls
= NULL_TREE
;
8857 int ellipsis
= !first_parm
|| first_parm
->ellipsis_p
;
8858 cp_parameter_declarator
*parm
;
8861 for (parm
= first_parm
; parm
!= NULL
; parm
= parm
->next
)
8863 tree type
= NULL_TREE
;
8864 tree init
= parm
->default_argument
;
8868 if (parm
== no_parameters
)
8871 attrs
= parm
->decl_specifiers
.attributes
;
8872 parm
->decl_specifiers
.attributes
= NULL_TREE
;
8873 decl
= grokdeclarator (parm
->declarator
, &parm
->decl_specifiers
,
8874 PARM
, init
!= NULL_TREE
, &attrs
);
8875 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
8879 cplus_decl_attributes (&decl
, attrs
, 0);
8881 type
= TREE_TYPE (decl
);
8882 if (VOID_TYPE_P (type
))
8884 if (same_type_p (type
, void_type_node
)
8885 && DECL_SELF_REFERENCE_P (type
)
8886 && !DECL_NAME (decl
) && !result
&& !parm
->next
&& !ellipsis
)
8887 /* this is a parmlist of `(void)', which is ok. */
8889 cxx_incomplete_type_error (decl
, type
);
8890 /* It's not a good idea to actually create parameters of
8891 type `void'; other parts of the compiler assume that a
8892 void type terminates the parameter list. */
8893 type
= error_mark_node
;
8894 TREE_TYPE (decl
) = error_mark_node
;
8897 if (type
!= error_mark_node
)
8899 /* Top-level qualifiers on the parameters are
8900 ignored for function types. */
8901 type
= cp_build_qualified_type (type
, 0);
8902 if (TREE_CODE (type
) == METHOD_TYPE
)
8904 error ("parameter %qD invalidly declared method type", decl
);
8905 type
= build_pointer_type (type
);
8906 TREE_TYPE (decl
) = type
;
8908 else if (abstract_virtuals_error (decl
, type
))
8909 any_error
= 1; /* Seems like a good idea. */
8910 else if (POINTER_TYPE_P (type
))
8912 /* [dcl.fct]/6, parameter types cannot contain pointers
8913 (references) to arrays of unknown bound. */
8914 tree t
= TREE_TYPE (type
);
8915 int ptr
= TYPE_PTR_P (type
);
8921 else if (TREE_CODE (t
) != ARRAY_TYPE
)
8923 else if (!TYPE_DOMAIN (t
))
8927 if (TREE_CODE (t
) == ARRAY_TYPE
)
8928 error ("parameter %qD includes %s to array of unknown "
8930 decl
, ptr
? "pointer" : "reference", t
);
8935 else if (init
&& !processing_template_decl
)
8936 init
= check_default_argument (decl
, init
);
8939 TREE_CHAIN (decl
) = decls
;
8941 result
= tree_cons (init
, type
, result
);
8943 decls
= nreverse (decls
);
8944 result
= nreverse (result
);
8946 result
= chainon (result
, void_list_node
);
8953 /* D is a constructor or overloaded `operator='.
8955 Let T be the class in which D is declared. Then, this function
8958 -1 if D's is an ill-formed constructor or copy assignment operator
8959 whose first parameter is of type `T'.
8960 0 if D is not a copy constructor or copy assignment
8962 1 if D is a copy constructor or copy assignment operator whose
8963 first parameter is a reference to const qualified T.
8964 2 if D is a copy constructor or copy assignment operator whose
8965 first parameter is a reference to non-const qualified T.
8967 This function can be used as a predicate. Positive values indicate
8968 a copy constructor and nonzero values indicate a copy assignment
8978 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
8980 if (TREE_CODE (d
) == TEMPLATE_DECL
8981 || (DECL_TEMPLATE_INFO (d
)
8982 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
8983 /* Instantiations of template member functions are never copy
8984 functions. Note that member functions of templated classes are
8985 represented as template functions internally, and we must
8986 accept those as copy functions. */
8989 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
8993 arg_type
= TREE_VALUE (args
);
8994 if (arg_type
== error_mark_node
)
8997 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
8999 /* Pass by value copy assignment operator. */
9002 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
9003 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
9005 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
9011 args
= TREE_CHAIN (args
);
9013 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
9014 /* There are more non-optional args. */
9020 /* Remember any special properties of member function DECL. */
9022 void grok_special_member_properties (tree decl
)
9026 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
9029 class_type
= DECL_CONTEXT (decl
);
9030 if (DECL_CONSTRUCTOR_P (decl
))
9032 int ctor
= copy_fn_p (decl
);
9034 TYPE_HAS_CONSTRUCTOR (class_type
) = 1;
9040 A non-template constructor for class X is a copy
9041 constructor if its first parameter is of type X&, const
9042 X&, volatile X& or const volatile X&, and either there
9043 are no other parameters or else all other parameters have
9044 default arguments. */
9045 TYPE_HAS_INIT_REF (class_type
) = 1;
9047 TYPE_HAS_CONST_INIT_REF (class_type
) = 1;
9049 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
9050 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
9052 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
9056 A non-template assignment operator for class X is a copy
9057 assignment operator if its parameter is of type X, X&, const
9058 X&, volatile X& or const volatile X&. */
9060 int assop
= copy_fn_p (decl
);
9064 TYPE_HAS_ASSIGN_REF (class_type
) = 1;
9066 TYPE_HAS_CONST_ASSIGN_REF (class_type
) = 1;
9071 /* Check a constructor DECL has the correct form. Complains
9072 if the class has a constructor of the form X(X). */
9075 grok_ctor_properties (tree ctype
, tree decl
)
9077 int ctor_parm
= copy_fn_p (decl
);
9083 A declaration of a constructor for a class X is ill-formed if
9084 its first parameter is of type (optionally cv-qualified) X
9085 and either there are no other parameters or else all other
9086 parameters have default arguments.
9088 We *don't* complain about member template instantiations that
9089 have this form, though; they can occur as we try to decide
9090 what constructor to use during overload resolution. Since
9091 overload resolution will never prefer such a constructor to
9092 the non-template copy constructor (which is either explicitly
9093 or implicitly defined), there's no need to worry about their
9094 existence. Theoretically, they should never even be
9095 instantiated, but that's hard to forestall. */
9096 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9104 /* An operator with this code is unary, but can also be binary. */
9107 ambi_op_p (enum tree_code code
)
9109 return (code
== INDIRECT_REF
9110 || code
== ADDR_EXPR
9111 || code
== UNARY_PLUS_EXPR
9112 || code
== NEGATE_EXPR
9113 || code
== PREINCREMENT_EXPR
9114 || code
== PREDECREMENT_EXPR
);
9117 /* An operator with this name can only be unary. */
9120 unary_op_p (enum tree_code code
)
9122 return (code
== TRUTH_NOT_EXPR
9123 || code
== BIT_NOT_EXPR
9124 || code
== COMPONENT_REF
9125 || code
== TYPE_EXPR
);
9128 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9129 errors are issued for invalid declarations. */
9132 grok_op_properties (tree decl
, bool complain
)
9134 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
9136 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
9137 tree name
= DECL_NAME (decl
);
9138 enum tree_code operator_code
;
9143 /* Count the number of arguments and check for ellipsis. */
9144 for (argtype
= argtypes
, arity
= 0;
9145 argtype
&& argtype
!= void_list_node
;
9146 argtype
= TREE_CHAIN (argtype
))
9148 ellipsis_p
= !argtype
;
9150 class_type
= DECL_CONTEXT (decl
);
9151 if (class_type
&& !CLASS_TYPE_P (class_type
))
9152 class_type
= NULL_TREE
;
9154 if (DECL_CONV_FN_P (decl
))
9155 operator_code
= TYPE_EXPR
;
9159 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9160 if (ansi_opname (CODE) == name) \
9162 operator_code = (CODE); \
9165 else if (ansi_assopname (CODE) == name) \
9167 operator_code = (CODE); \
9168 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9172 #include "operators.def"
9178 gcc_assert (operator_code
!= LAST_CPLUS_TREE_CODE
);
9179 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
9182 switch (operator_code
)
9185 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
9189 TYPE_GETS_DELETE (class_type
) |= 1;
9193 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
9196 case VEC_DELETE_EXPR
:
9197 TYPE_GETS_DELETE (class_type
) |= 2;
9204 /* [basic.std.dynamic.allocation]/1:
9206 A program is ill-formed if an allocation function is declared
9207 in a namespace scope other than global scope or declared static
9210 The same also holds true for deallocation functions. */
9211 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
9212 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
9214 if (DECL_NAMESPACE_SCOPE_P (decl
))
9216 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
9218 error ("%qD may not be declared within a namespace", decl
);
9221 else if (!TREE_PUBLIC (decl
))
9223 error ("%qD may not be declared as static", decl
);
9229 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
9230 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
9231 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
9232 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
9235 /* An operator function must either be a non-static member function
9236 or have at least one parameter of a class, a reference to a class,
9237 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9238 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
9240 if (operator_code
== TYPE_EXPR
9241 || operator_code
== CALL_EXPR
9242 || operator_code
== COMPONENT_REF
9243 || operator_code
== ARRAY_REF
9244 || operator_code
== NOP_EXPR
)
9246 error ("%qD must be a nonstatic member function", decl
);
9253 if (DECL_STATIC_FUNCTION_P (decl
))
9255 error ("%qD must be either a non-static member "
9256 "function or a non-member function", decl
);
9260 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
9262 tree arg
= non_reference (TREE_VALUE (p
));
9263 if (arg
== error_mark_node
)
9266 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9267 because these checks are performed even on
9268 template functions. */
9269 if (IS_AGGR_TYPE (arg
) || TREE_CODE (arg
) == ENUMERAL_TYPE
)
9273 if (!p
|| p
== void_list_node
)
9276 error ("%qD must have an argument of class or "
9277 "enumerated type", decl
);
9283 /* There are no restrictions on the arguments to an overloaded
9285 if (operator_code
== CALL_EXPR
)
9288 /* Warn about conversion operators that will never be used. */
9289 if (IDENTIFIER_TYPENAME_P (name
)
9290 && ! DECL_TEMPLATE_INFO (decl
)
9292 /* Warn only declaring the function; there is no need to
9293 warn again about out-of-class definitions. */
9294 && class_type
== current_class_type
)
9296 tree t
= TREE_TYPE (name
);
9297 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
9298 const char *what
= 0;
9301 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
9303 if (TREE_CODE (t
) == VOID_TYPE
)
9305 else if (class_type
)
9307 if (t
== class_type
)
9308 what
= "the same type";
9309 /* Don't force t to be complete here. */
9310 else if (IS_AGGR_TYPE (t
)
9311 && COMPLETE_TYPE_P (t
)
9312 && DERIVED_FROM_P (t
, class_type
))
9313 what
= "a base class";
9317 warning (OPT_Wconversion
, "conversion to %s%s will never use a type "
9318 "conversion operator",
9319 ref
? "a reference to " : "", what
);
9322 if (operator_code
== COND_EXPR
)
9325 error ("ISO C++ prohibits overloading operator ?:");
9328 else if (ellipsis_p
)
9330 error ("%qD must not have variable number of arguments", decl
);
9333 else if (ambi_op_p (operator_code
))
9336 /* We pick the one-argument operator codes by default, so
9337 we don't have to change anything. */
9339 else if (arity
== 2)
9341 /* If we thought this was a unary operator, we now know
9342 it to be a binary operator. */
9343 switch (operator_code
)
9346 operator_code
= MULT_EXPR
;
9350 operator_code
= BIT_AND_EXPR
;
9353 case UNARY_PLUS_EXPR
:
9354 operator_code
= PLUS_EXPR
;
9358 operator_code
= MINUS_EXPR
;
9361 case PREINCREMENT_EXPR
:
9362 operator_code
= POSTINCREMENT_EXPR
;
9365 case PREDECREMENT_EXPR
:
9366 operator_code
= POSTDECREMENT_EXPR
;
9373 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
9375 if ((operator_code
== POSTINCREMENT_EXPR
9376 || operator_code
== POSTDECREMENT_EXPR
)
9377 && ! processing_template_decl
9378 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
9381 error ("postfix %qD must take %<int%> as its argument",
9384 error ("postfix %qD must take %<int%> as its second "
9392 error ("%qD must take either zero or one argument", decl
);
9394 error ("%qD must take either one or two arguments", decl
);
9398 /* More Effective C++ rule 6. */
9400 && (operator_code
== POSTINCREMENT_EXPR
9401 || operator_code
== POSTDECREMENT_EXPR
9402 || operator_code
== PREINCREMENT_EXPR
9403 || operator_code
== PREDECREMENT_EXPR
))
9405 tree arg
= TREE_VALUE (argtypes
);
9406 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
9407 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
9408 arg
= TREE_TYPE (arg
);
9409 arg
= TYPE_MAIN_VARIANT (arg
);
9410 if (operator_code
== PREINCREMENT_EXPR
9411 || operator_code
== PREDECREMENT_EXPR
)
9413 if (TREE_CODE (ret
) != REFERENCE_TYPE
9414 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
9416 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
9417 build_reference_type (arg
));
9421 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
9422 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
9426 else if (unary_op_p (operator_code
))
9431 error ("%qD must take %<void%>", decl
);
9433 error ("%qD must take exactly one argument", decl
);
9437 else /* if (binary_op_p (operator_code)) */
9442 error ("%qD must take exactly one argument", decl
);
9444 error ("%qD must take exactly two arguments", decl
);
9448 /* More Effective C++ rule 7. */
9450 && (operator_code
== TRUTH_ANDIF_EXPR
9451 || operator_code
== TRUTH_ORIF_EXPR
9452 || operator_code
== COMPOUND_EXPR
))
9453 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
9457 /* Effective C++ rule 23. */
9460 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
9461 && (operator_code
== PLUS_EXPR
9462 || operator_code
== MINUS_EXPR
9463 || operator_code
== TRUNC_DIV_EXPR
9464 || operator_code
== MULT_EXPR
9465 || operator_code
== TRUNC_MOD_EXPR
)
9466 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
9467 warning (OPT_Weffc__
, "%qD should return by value", decl
);
9470 for (; argtypes
&& argtypes
!= void_list_node
;
9471 argtypes
= TREE_CHAIN (argtypes
))
9472 if (TREE_PURPOSE (argtypes
))
9474 TREE_PURPOSE (argtypes
) = NULL_TREE
;
9475 if (operator_code
== POSTINCREMENT_EXPR
9476 || operator_code
== POSTDECREMENT_EXPR
)
9479 pedwarn ("%qD cannot have default arguments", decl
);
9483 error ("%qD cannot have default arguments", decl
);
9491 /* Return a string giving the keyword associate with CODE. */
9494 tag_name (enum tag_types code
)
9513 /* Name lookup in an elaborated-type-specifier (after the keyword
9514 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9515 elaborated-type-specifier is invalid, issue a diagnostic and return
9516 error_mark_node; otherwise, return the *_TYPE to which it referred.
9517 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9520 check_elaborated_type_specifier (enum tag_types tag_code
,
9522 bool allow_template_p
)
9528 struct S { struct S *p; };
9530 name lookup will find the TYPE_DECL for the implicit "S::S"
9531 typedef. Adjust for that here. */
9532 if (DECL_SELF_REFERENCE_P (decl
))
9533 decl
= TYPE_NAME (TREE_TYPE (decl
));
9535 type
= TREE_TYPE (decl
);
9537 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9538 is false for this case as well. */
9539 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9541 error ("using template type parameter %qT after %qs",
9542 type
, tag_name (tag_code
));
9543 return error_mark_node
;
9547 If the identifier resolves to a typedef-name or a template
9548 type-parameter, the elaborated-type-specifier is ill-formed.
9550 In other words, the only legitimate declaration to use in the
9551 elaborated type specifier is the implicit typedef created when
9552 the type is declared. */
9553 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
9554 && tag_code
!= typename_type
)
9556 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
9557 error ("%q+D has a previous declaration here", decl
);
9558 return error_mark_node
;
9560 else if (TREE_CODE (type
) != RECORD_TYPE
9561 && TREE_CODE (type
) != UNION_TYPE
9562 && tag_code
!= enum_type
9563 && tag_code
!= typename_type
)
9565 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
9566 error ("%q+T has a previous declaration here", type
);
9567 return error_mark_node
;
9569 else if (TREE_CODE (type
) != ENUMERAL_TYPE
9570 && tag_code
== enum_type
)
9572 error ("%qT referred to as enum", type
);
9573 error ("%q+T has a previous declaration here", type
);
9574 return error_mark_node
;
9576 else if (!allow_template_p
9577 && TREE_CODE (type
) == RECORD_TYPE
9578 && CLASSTYPE_IS_TEMPLATE (type
))
9580 /* If a class template appears as elaborated type specifier
9581 without a template header such as:
9583 template <class T> class C {};
9584 void f(class C); // No template header here
9586 then the required template argument is missing. */
9587 error ("template argument required for %<%s %T%>",
9588 tag_name (tag_code
),
9589 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
9590 return error_mark_node
;
9596 /* Lookup NAME in elaborate type specifier in scope according to
9597 SCOPE and issue diagnostics if necessary.
9598 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9599 found, and ERROR_MARK_NODE for type error. */
9602 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
9603 tag_scope scope
, bool template_header_p
)
9607 if (scope
== ts_global
)
9609 /* First try ordinary name lookup, ignoring hidden class name
9610 injected via friend declaration. */
9611 decl
= lookup_name_prefer_type (name
, 2);
9612 /* If that fails, the name will be placed in the smallest
9613 non-class, non-function-prototype scope according to 3.3.1/5.
9614 We may already have a hidden name declared as friend in this
9615 scope. So lookup again but not ignoring hidden names.
9616 If we find one, that name will be made visible rather than
9617 creating a new tag. */
9619 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
9622 decl
= lookup_type_scope (name
, scope
);
9624 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
9625 decl
= DECL_TEMPLATE_RESULT (decl
);
9627 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
9629 /* Look for invalid nested type:
9633 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
9635 error ("%qD has the same name as the class in which it is "
9638 return error_mark_node
;
9641 /* Two cases we need to consider when deciding if a class
9642 template is allowed as an elaborated type specifier:
9643 1. It is a self reference to its own class.
9644 2. It comes with a template header.
9648 template <class T> class C {
9649 class C *c1; // DECL_SELF_REFERENCE_P is true
9652 template <class U> class C; // template_header_p is true
9653 template <class T> class C<T>::D {
9654 class C *c2; // DECL_SELF_REFERENCE_P is true
9657 t
= check_elaborated_type_specifier (tag_code
,
9660 | DECL_SELF_REFERENCE_P (decl
));
9667 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9668 Define the tag as a forward-reference if it is not defined.
9670 If a declaration is given, process it here, and report an error if
9671 multiple declarations are not identical.
9673 SCOPE is TS_CURRENT when this is also a definition. Only look in
9674 the current frame for the name (since C++ allows new names in any
9675 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9676 declaration. Only look beginning from the current scope outward up
9677 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9679 TEMPLATE_HEADER_P is true when this declaration is preceded by
9680 a set of template parameters. */
9683 xref_tag (enum tag_types tag_code
, tree name
,
9684 tag_scope scope
, bool template_header_p
)
9686 enum tree_code code
;
9688 tree context
= NULL_TREE
;
9690 timevar_push (TV_NAME_LOOKUP
);
9692 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
9704 code
= ENUMERAL_TYPE
;
9710 /* In case of anonymous name, xref_tag is only called to
9711 make type node and push name. Name lookup is not required. */
9712 if (ANON_AGGRNAME_P (name
))
9715 t
= lookup_and_check_tag (tag_code
, name
,
9716 scope
, template_header_p
);
9718 if (t
== error_mark_node
)
9719 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
9721 if (scope
!= ts_current
&& t
&& current_class_type
9722 && template_class_depth (current_class_type
)
9723 && template_header_p
)
9725 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9726 definition of this tag. Since, in addition, we are currently
9727 processing a (member) template declaration of a template
9728 class, we must be very careful; consider:
9735 { template <class V>
9736 friend struct S1; };
9738 Here, the S2::S1 declaration should not be confused with the
9739 outer declaration. In particular, the inner version should
9740 have a template parameter of level 2, not level 1. This
9741 would be particularly important if the member declaration
9744 template <class V = U> friend struct S1;
9746 say, when we should tsubst into `U' when instantiating
9747 S2. On the other hand, when presented with:
9757 we must find the inner binding eventually. We
9758 accomplish this by making sure that the new type we
9759 create to represent this declaration has the right
9761 context
= TYPE_CONTEXT (t
);
9767 /* If no such tag is yet defined, create a forward-reference node
9768 and record it as the "definition".
9769 When a real declaration of this type is found,
9770 the forward-reference will be altered into a real type. */
9771 if (code
== ENUMERAL_TYPE
)
9773 error ("use of enum %q#D without previous declaration", name
);
9774 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
9778 t
= make_aggr_type (code
);
9779 TYPE_CONTEXT (t
) = context
;
9780 t
= pushtag (name
, t
, scope
);
9785 if (template_header_p
&& IS_AGGR_TYPE (t
))
9787 if (!redeclare_class_template (t
, current_template_parms
))
9788 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
9790 else if (!processing_template_decl
9792 && CLASSTYPE_IS_TEMPLATE (t
))
9794 error ("redeclaration of %qT as a non-template", t
);
9795 error ("previous declaration %q+D", t
);
9796 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
9799 /* Make injected friend class visible. */
9800 if (scope
!= ts_within_enclosing_non_class
9801 && hidden_name_p (TYPE_NAME (t
)))
9803 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
9804 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
9806 if (TYPE_TEMPLATE_INFO (t
))
9808 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
9809 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
9814 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, t
);
9818 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
9820 enum tag_types tag_kind
;
9822 if (TREE_CODE (old
) == RECORD_TYPE
)
9823 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
9825 tag_kind
= union_type
;
9827 if (id
== NULL_TREE
)
9828 id
= TYPE_IDENTIFIER (old
);
9830 return xref_tag (tag_kind
, id
, scope
, false);
9833 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9834 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9835 access_* node, and the TREE_VALUE is the type of the base-class.
9836 Non-NULL TREE_TYPE indicates virtual inheritance.
9838 Returns true if the binfo hierarchy was successfully created,
9839 false if an error was detected. */
9842 xref_basetypes (tree ref
, tree base_list
)
9845 tree binfo
, base_binfo
;
9846 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
9847 unsigned max_bases
= 0; /* Maximum direct bases. */
9849 tree default_access
;
9850 tree igo_prev
; /* Track Inheritance Graph Order. */
9852 if (ref
== error_mark_node
)
9855 /* The base of a derived class is private by default, all others are
9857 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
9858 && CLASSTYPE_DECLARED_CLASS (ref
)
9859 ? access_private_node
: access_public_node
);
9861 /* First, make sure that any templates in base-classes are
9862 instantiated. This ensures that if we call ourselves recursively
9863 we do not get confused about which classes are marked and which
9868 tree basetype
= TREE_VALUE (*basep
);
9870 if (!(processing_template_decl
&& uses_template_parms (basetype
))
9871 && !complete_type_or_else (basetype
, NULL
))
9872 /* An incomplete type. Remove it from the list. */
9873 *basep
= TREE_CHAIN (*basep
);
9877 if (TREE_TYPE (*basep
))
9879 if (CLASS_TYPE_P (basetype
))
9880 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
9881 basep
= &TREE_CHAIN (*basep
);
9885 TYPE_MARKED_P (ref
) = 1;
9887 /* The binfo slot should be empty, unless this is an (ill-formed)
9889 gcc_assert (!TYPE_BINFO (ref
) || TYPE_SIZE (ref
));
9890 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
9892 binfo
= make_tree_binfo (max_bases
);
9894 TYPE_BINFO (ref
) = binfo
;
9895 BINFO_OFFSET (binfo
) = size_zero_node
;
9896 BINFO_TYPE (binfo
) = ref
;
9900 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
9901 /* An aggregate cannot have baseclasses. */
9902 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
9904 if (TREE_CODE (ref
) == UNION_TYPE
)
9906 error ("derived union %qT invalid", ref
);
9913 if (TYPE_FOR_JAVA (ref
))
9915 error ("Java class %qT cannot have multiple bases", ref
);
9922 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
9924 if (TYPE_FOR_JAVA (ref
))
9926 error ("Java class %qT cannot have virtual bases", ref
);
9931 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
9933 tree access
= TREE_PURPOSE (base_list
);
9934 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
9935 tree basetype
= TREE_VALUE (base_list
);
9937 if (access
== access_default_node
)
9938 access
= default_access
;
9940 if (TREE_CODE (basetype
) == TYPE_DECL
)
9941 basetype
= TREE_TYPE (basetype
);
9942 if (TREE_CODE (basetype
) != RECORD_TYPE
9943 && TREE_CODE (basetype
) != TYPENAME_TYPE
9944 && TREE_CODE (basetype
) != TEMPLATE_TYPE_PARM
9945 && TREE_CODE (basetype
) != BOUND_TEMPLATE_TEMPLATE_PARM
)
9947 error ("base type %qT fails to be a struct or class type",
9952 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
9953 TYPE_FOR_JAVA (ref
) = 1;
9955 base_binfo
= NULL_TREE
;
9956 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
9958 base_binfo
= TYPE_BINFO (basetype
);
9959 /* The original basetype could have been a typedef'd type. */
9960 basetype
= BINFO_TYPE (base_binfo
);
9962 /* Inherit flags from the base. */
9963 TYPE_HAS_NEW_OPERATOR (ref
)
9964 |= TYPE_HAS_NEW_OPERATOR (basetype
);
9965 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
9966 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
9967 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
9968 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
9969 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
9970 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
9971 CLASSTYPE_REPEATED_BASE_P (ref
)
9972 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
9975 /* We must do this test after we've seen through a typedef
9977 if (TYPE_MARKED_P (basetype
))
9979 if (basetype
== ref
)
9980 error ("recursive type %qT undefined", basetype
);
9982 error ("duplicate base type %qT invalid", basetype
);
9985 TYPE_MARKED_P (basetype
) = 1;
9987 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
9988 &igo_prev
, via_virtual
);
9989 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
9990 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
9992 BINFO_BASE_APPEND (binfo
, base_binfo
);
9993 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
9996 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
9997 /* If we have space in the vbase vector, we must have shared at
9998 least one of them, and are therefore diamond shaped. */
9999 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
10001 /* Unmark all the types. */
10002 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
10003 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
10004 TYPE_MARKED_P (ref
) = 0;
10006 /* Now see if we have a repeated base type. */
10007 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
10009 for (base_binfo
= binfo
; base_binfo
;
10010 base_binfo
= TREE_CHAIN (base_binfo
))
10012 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
10014 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
10017 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
10019 for (base_binfo
= binfo
; base_binfo
;
10020 base_binfo
= TREE_CHAIN (base_binfo
))
10021 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
10022 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
10031 /* Begin compiling the definition of an enumeration type.
10033 Returns the type object, as yet incomplete.
10034 Also records info about it so that build_enumerator
10035 may be used to declare the individual values as they are read. */
10038 start_enum (tree name
)
10042 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
10044 /* If this is the real definition for a previous forward reference,
10045 fill in the contents in the same object that used to be the
10046 forward reference. */
10048 enumtype
= lookup_and_check_tag (enum_type
, name
,
10049 /*tag_scope=*/ts_current
,
10050 /*template_header_p=*/false);
10052 if (enumtype
!= NULL_TREE
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
10054 error ("multiple definition of %q#T", enumtype
);
10055 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype
));
10056 /* Clear out TYPE_VALUES, and start again. */
10057 TYPE_VALUES (enumtype
) = NULL_TREE
;
10061 /* In case of error, make a dummy enum to allow parsing to
10063 if (enumtype
== error_mark_node
)
10064 name
= make_anon_name ();
10066 enumtype
= make_node (ENUMERAL_TYPE
);
10067 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
10073 /* After processing and defining all the values of an enumeration type,
10074 install their decls in the enumeration type and finish it off.
10075 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10078 finish_enum (tree enumtype
)
10087 bool use_short_enum
;
10091 integer_type_kind itk
;
10092 tree underlying_type
= NULL_TREE
;
10094 /* We built up the VALUES in reverse order. */
10095 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
10097 /* For an enum defined in a template, just set the type of the values;
10098 all further processing is postponed until the template is
10099 instantiated. We need to set the type so that tsubst of a CONST_DECL
10101 if (processing_template_decl
)
10103 for (values
= TYPE_VALUES (enumtype
);
10105 values
= TREE_CHAIN (values
))
10106 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
10107 if (at_function_scope_p ())
10108 add_stmt (build_min (TAG_DEFN
, enumtype
));
10112 /* Determine the minimum and maximum values of the enumerators. */
10113 if (TYPE_VALUES (enumtype
))
10115 minnode
= maxnode
= NULL_TREE
;
10117 for (values
= TYPE_VALUES (enumtype
);
10119 values
= TREE_CHAIN (values
))
10121 decl
= TREE_VALUE (values
);
10123 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10124 each enumerator has the type of its enumeration. Prior to the
10125 closing brace, the type of each enumerator is the type of its
10126 initializing value. */
10127 TREE_TYPE (decl
) = enumtype
;
10129 /* Update the minimum and maximum values, if appropriate. */
10130 value
= DECL_INITIAL (decl
);
10131 if (value
== error_mark_node
)
10132 value
= integer_zero_node
;
10133 /* Figure out what the minimum and maximum values of the
10134 enumerators are. */
10136 minnode
= maxnode
= value
;
10137 else if (tree_int_cst_lt (maxnode
, value
))
10139 else if (tree_int_cst_lt (value
, minnode
))
10146 If the enumerator-list is empty, the underlying type is as if
10147 the enumeration had a single enumerator with value 0. */
10148 minnode
= maxnode
= integer_zero_node
;
10150 /* Compute the number of bits require to represent all values of the
10151 enumeration. We must do this before the type of MINNODE and
10152 MAXNODE are transformed, since min_precision relies on the
10153 TREE_TYPE of the value it is passed. */
10154 unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
10155 lowprec
= min_precision (minnode
, unsignedp
);
10156 highprec
= min_precision (maxnode
, unsignedp
);
10157 precision
= MAX (lowprec
, highprec
);
10159 /* Determine the underlying type of the enumeration.
10163 The underlying type of an enumeration is an integral type that
10164 can represent all the enumerator values defined in the
10165 enumeration. It is implementation-defined which integral type is
10166 used as the underlying type for an enumeration except that the
10167 underlying type shall not be larger than int unless the value of
10168 an enumerator cannot fit in an int or unsigned int.
10170 We use "int" or an "unsigned int" as the underlying type, even if
10171 a smaller integral type would work, unless the user has
10172 explicitly requested that we use the smallest possible type. The
10173 user can request that for all enumerations with a command line
10174 flag, or for just one enumeration with an attribute. */
10176 use_short_enum
= flag_short_enums
10177 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
10179 for (itk
= (use_short_enum
? itk_char
: itk_int
);
10183 underlying_type
= integer_types
[itk
];
10184 if (TYPE_PRECISION (underlying_type
) >= precision
10185 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
10188 if (itk
== itk_none
)
10192 IF no integral type can represent all the enumerator values, the
10193 enumeration is ill-formed. */
10194 error ("no integral type can represent all of the enumerator values "
10195 "for %qT", enumtype
);
10196 precision
= TYPE_PRECISION (long_long_integer_type_node
);
10197 underlying_type
= integer_types
[itk_unsigned_long_long
];
10200 /* Compute the minium and maximum values for the type.
10204 For an enumeration where emin is the smallest enumerator and emax
10205 is the largest, the values of the enumeration are the values of the
10206 underlying type in the range bmin to bmax, where bmin and bmax are,
10207 respectively, the smallest and largest values of the smallest bit-
10208 field that can store emin and emax. */
10210 /* The middle-end currently assumes that types with TYPE_PRECISION
10211 narrower than their underlying type are suitably zero or sign
10212 extended to fill their mode. g++ doesn't make these guarantees.
10213 Until the middle-end can represent such paradoxical types, we
10214 set the TYPE_PRECISION to the width of the underlying type. */
10215 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (underlying_type
);
10217 set_min_and_max_values_for_integral_type (enumtype
, precision
, unsignedp
);
10221 The value of sizeof() applied to an enumeration type, an object
10222 of an enumeration type, or an enumerator, is the value of sizeof()
10223 applied to the underlying type. */
10224 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
10225 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
10226 TYPE_MODE (enumtype
) = TYPE_MODE (underlying_type
);
10227 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
10228 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
10229 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
10231 /* Convert each of the enumerators to the type of the underlying
10232 type of the enumeration. */
10233 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
10235 location_t saved_location
;
10237 decl
= TREE_VALUE (values
);
10238 saved_location
= input_location
;
10239 input_location
= DECL_SOURCE_LOCATION (decl
);
10240 value
= perform_implicit_conversion (underlying_type
,
10241 DECL_INITIAL (decl
));
10242 input_location
= saved_location
;
10244 /* Do not clobber shared ints. */
10245 value
= copy_node (value
);
10247 TREE_TYPE (value
) = enumtype
;
10248 DECL_INITIAL (decl
) = value
;
10249 TREE_VALUE (values
) = value
;
10252 /* Fix up all variant types of this enum type. */
10253 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
10255 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
10256 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (enumtype
);
10257 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (enumtype
);
10258 TYPE_SIZE (t
) = TYPE_SIZE (enumtype
);
10259 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (enumtype
);
10260 TYPE_MODE (t
) = TYPE_MODE (enumtype
);
10261 TYPE_PRECISION (t
) = TYPE_PRECISION (enumtype
);
10262 TYPE_ALIGN (t
) = TYPE_ALIGN (enumtype
);
10263 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (enumtype
);
10264 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (enumtype
);
10267 /* Finish debugging output for this type. */
10268 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
10271 /* Build and install a CONST_DECL for an enumeration constant of the
10272 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10273 Assignment of sequential values by default is handled here. */
10276 build_enumerator (tree name
, tree value
, tree enumtype
)
10282 /* If the VALUE was erroneous, pretend it wasn't there; that will
10283 result in the enum being assigned the next value in sequence. */
10284 if (value
== error_mark_node
)
10287 /* Remove no-op casts from the value. */
10289 STRIP_TYPE_NOPS (value
);
10291 if (! processing_template_decl
)
10293 /* Validate and default VALUE. */
10294 if (value
!= NULL_TREE
)
10296 value
= integral_constant_value (value
);
10298 if (TREE_CODE (value
) == INTEGER_CST
)
10300 value
= perform_integral_promotions (value
);
10301 constant_expression_warning (value
);
10305 error ("enumerator value for %qD is not an integer constant", name
);
10310 /* Default based on previous value. */
10311 if (value
== NULL_TREE
)
10313 if (TYPE_VALUES (enumtype
))
10316 unsigned HOST_WIDE_INT lo
;
10320 /* The next value is the previous value plus one. We can
10321 safely assume that the previous value is an INTEGER_CST.
10322 add_double doesn't know the type of the target expression,
10323 so we must check with int_fits_type_p as well. */
10324 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
10325 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
10326 TREE_INT_CST_HIGH (prev_value
),
10328 value
= build_int_cst_wide (TREE_TYPE (prev_value
), lo
, hi
);
10329 overflowed
|= !int_fits_type_p (value
, TREE_TYPE (prev_value
));
10333 error ("overflow in enumeration values at %qD", name
);
10334 value
= error_mark_node
;
10338 value
= integer_zero_node
;
10341 /* Remove no-op casts from the value. */
10342 STRIP_TYPE_NOPS (value
);
10345 /* C++ associates enums with global, function, or class declarations. */
10346 context
= current_scope ();
10348 /* Build the actual enumeration constant. Note that the enumeration
10349 constants have the type of their initializers until the
10350 enumeration is complete:
10354 Following the closing brace of an enum-specifier, each enumer-
10355 ator has the type of its enumeration. Prior to the closing
10356 brace, the type of each enumerator is the type of its
10357 initializing value.
10359 In finish_enum we will reset the type. Of course, if we're
10360 processing a template, there may be no value. */
10361 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
10363 if (context
&& context
== current_class_type
)
10364 /* This enum declaration is local to the class. We need the full
10365 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10366 decl
= build_lang_decl (CONST_DECL
, name
, type
);
10368 /* It's a global enum, or it's local to a function. (Note local to
10369 a function could mean local to a class method. */
10370 decl
= build_decl (CONST_DECL
, name
, type
);
10372 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
10373 TREE_CONSTANT (decl
) = 1;
10374 TREE_INVARIANT (decl
) = 1;
10375 TREE_READONLY (decl
) = 1;
10376 DECL_INITIAL (decl
) = value
;
10378 if (context
&& context
== current_class_type
)
10379 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10380 on the TYPE_FIELDS list for `S'. (That's so that you can say
10381 things like `S::i' later.) */
10382 finish_member_declaration (decl
);
10386 /* Add this enumeration constant to the list for this type. */
10387 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
10391 /* We're defining DECL. Make sure that it's type is OK. */
10394 check_function_type (tree decl
, tree current_function_parms
)
10396 tree fntype
= TREE_TYPE (decl
);
10397 tree return_type
= complete_type (TREE_TYPE (fntype
));
10399 /* In a function definition, arg types must be complete. */
10400 require_complete_types_for_parms (current_function_parms
);
10402 if (dependent_type_p (return_type
))
10404 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
10406 tree args
= TYPE_ARG_TYPES (fntype
);
10408 error ("return type %q#T is incomplete", return_type
);
10410 /* Make it return void instead. */
10411 if (TREE_CODE (fntype
) == METHOD_TYPE
)
10412 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
10414 TREE_CHAIN (args
));
10416 fntype
= build_function_type (void_type_node
, args
);
10418 = build_exception_variant (fntype
,
10419 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
10422 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
10425 /* Create the FUNCTION_DECL for a function definition.
10426 DECLSPECS and DECLARATOR are the parts of the declaration;
10427 they describe the function's name and the type it returns,
10428 but twisted together in a fashion that parallels the syntax of C.
10430 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10431 DECLARATOR is really the DECL for the function we are about to
10432 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10433 indicating that the function is an inline defined in-class.
10435 This function creates a binding context for the function body
10436 as well as setting up the FUNCTION_DECL in current_function_decl.
10438 For C++, we must first check whether that datum makes any sense.
10439 For example, "class A local_a(1,2);" means that variable local_a
10440 is an aggregate of type A, which should have a constructor
10441 applied to it with the argument list [1, 2].
10443 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
10444 or may be a BLOCK if the function has been defined previously
10445 in this translation unit. On exit, DECL_INITIAL (decl1) will be
10446 error_mark_node if the function has never been defined, or
10447 a BLOCK if the function has been defined somewhere. */
10450 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
10452 tree ctype
= NULL_TREE
;
10455 int doing_friend
= 0;
10456 struct cp_binding_level
*bl
;
10457 tree current_function_parms
;
10458 struct c_fileinfo
*finfo
10459 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
10460 bool honor_interface
;
10462 /* Sanity check. */
10463 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
10464 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
10466 fntype
= TREE_TYPE (decl1
);
10467 if (TREE_CODE (fntype
) == METHOD_TYPE
)
10468 ctype
= TYPE_METHOD_BASETYPE (fntype
);
10470 /* ISO C++ 11.4/5. A friend function defined in a class is in
10471 the (lexical) scope of the class in which it is defined. */
10472 if (!ctype
&& DECL_FRIEND_P (decl1
))
10474 ctype
= DECL_FRIEND_CONTEXT (decl1
);
10476 /* CTYPE could be null here if we're dealing with a template;
10477 for example, `inline friend float foo()' inside a template
10478 will have no CTYPE set. */
10479 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
10485 if (DECL_DECLARED_INLINE_P (decl1
)
10486 && lookup_attribute ("noinline", attrs
))
10487 warning (0, "inline function %q+D given attribute noinline", decl1
);
10489 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
10490 /* This is a constructor, we must ensure that any default args
10491 introduced by this definition are propagated to the clones
10492 now. The clones are used directly in overload resolution. */
10493 adjust_clone_args (decl1
);
10495 /* Sometimes we don't notice that a function is a static member, and
10496 build a METHOD_TYPE for it. Fix that up now. */
10497 if (ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
10498 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
)
10500 revert_static_member_fn (decl1
);
10504 /* Set up current_class_type, and enter the scope of the class, if
10507 push_nested_class (ctype
);
10508 else if (DECL_STATIC_FUNCTION_P (decl1
))
10509 push_nested_class (DECL_CONTEXT (decl1
));
10511 /* Now that we have entered the scope of the class, we must restore
10512 the bindings for any template parameters surrounding DECL1, if it
10513 is an inline member template. (Order is important; consider the
10514 case where a template parameter has the same name as a field of
10515 the class.) It is not until after this point that
10516 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10517 if (flags
& SF_INCLASS_INLINE
)
10518 maybe_begin_member_template_processing (decl1
);
10520 /* Effective C++ rule 15. */
10522 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
10523 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
10524 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
10526 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10527 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10528 if (!DECL_INITIAL (decl1
))
10529 DECL_INITIAL (decl1
) = error_mark_node
;
10531 /* This function exists in static storage.
10532 (This does not mean `static' in the C sense!) */
10533 TREE_STATIC (decl1
) = 1;
10535 /* We must call push_template_decl after current_class_type is set
10536 up. (If we are processing inline definitions after exiting a
10537 class scope, current_class_type will be NULL_TREE until set above
10538 by push_nested_class.) */
10539 if (processing_template_decl
)
10541 /* FIXME: Handle error_mark_node more gracefully. */
10542 tree newdecl1
= push_template_decl (decl1
);
10543 if (newdecl1
!= error_mark_node
)
10547 /* We are now in the scope of the function being defined. */
10548 current_function_decl
= decl1
;
10550 /* Save the parm names or decls from this function's declarator
10551 where store_parm_decls will find them. */
10552 current_function_parms
= DECL_ARGUMENTS (decl1
);
10554 /* Make sure the parameter and return types are reasonable. When
10555 you declare a function, these types can be incomplete, but they
10556 must be complete when you define the function. */
10557 check_function_type (decl1
, current_function_parms
);
10559 /* Build the return declaration for the function. */
10560 restype
= TREE_TYPE (fntype
);
10561 /* Promote the value to int before returning it. */
10562 if (c_promoting_integer_type_p (restype
))
10563 restype
= type_promotes_to (restype
);
10564 if (DECL_RESULT (decl1
) == NULL_TREE
)
10568 resdecl
= build_decl (RESULT_DECL
, 0, TYPE_MAIN_VARIANT (restype
));
10569 DECL_ARTIFICIAL (resdecl
) = 1;
10570 DECL_IGNORED_P (resdecl
) = 1;
10571 DECL_RESULT (decl1
) = resdecl
;
10573 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
10576 /* Let the user know we're compiling this function. */
10577 announce_function (decl1
);
10579 /* Record the decl so that the function name is defined.
10580 If we already have a decl for this name, and it is a FUNCTION_DECL,
10581 use the old decl. */
10582 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
10584 /* A specialization is not used to guide overload resolution. */
10585 if (!DECL_FUNCTION_MEMBER_P (decl1
)
10586 && !(DECL_USE_TEMPLATE (decl1
) &&
10587 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
10589 tree olddecl
= pushdecl (decl1
);
10591 if (olddecl
== error_mark_node
)
10592 /* If something went wrong when registering the declaration,
10593 use DECL1; we have to have a FUNCTION_DECL to use when
10594 parsing the body of the function. */
10598 /* Otherwise, OLDDECL is either a previous declaration
10599 of the same function or DECL1 itself. */
10601 if (warn_missing_declarations
10602 && olddecl
== decl1
10603 && !DECL_MAIN_P (decl1
)
10604 && TREE_PUBLIC (decl1
)
10605 && !DECL_DECLARED_INLINE_P (decl1
))
10609 /* Check whether DECL1 is in an anonymous
10611 for (context
= DECL_CONTEXT (decl1
);
10613 context
= DECL_CONTEXT (context
))
10615 if (TREE_CODE (context
) == NAMESPACE_DECL
10616 && DECL_NAME (context
) == NULL_TREE
)
10620 if (context
== NULL
)
10621 warning (OPT_Wmissing_declarations
,
10622 "no previous declaration for %q+D", decl1
);
10630 /* We need to set the DECL_CONTEXT. */
10631 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
10632 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
10634 fntype
= TREE_TYPE (decl1
);
10636 /* If #pragma weak applies, mark the decl appropriately now.
10637 The pragma only applies to global functions. Because
10638 determining whether or not the #pragma applies involves
10639 computing the mangled name for the declaration, we cannot
10640 apply the pragma until after we have merged this declaration
10641 with any previous declarations; if the original declaration
10642 has a linkage specification, that specification applies to
10643 the definition as well, and may affect the mangled name. */
10644 if (!DECL_CONTEXT (decl1
))
10645 maybe_apply_pragma_weak (decl1
);
10648 /* Reset this in case the call to pushdecl changed it. */
10649 current_function_decl
= decl1
;
10651 gcc_assert (DECL_INITIAL (decl1
));
10653 /* This function may already have been parsed, in which case just
10654 return; our caller will skip over the body without parsing. */
10655 if (DECL_INITIAL (decl1
) != error_mark_node
)
10658 /* Initialize RTL machinery. We cannot do this until
10659 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10660 even when processing a template; this is how we get
10661 CFUN set up, and our per-function variables initialized.
10662 FIXME factor out the non-RTL stuff. */
10663 bl
= current_binding_level
;
10664 allocate_struct_function (decl1
);
10665 current_binding_level
= bl
;
10667 /* Even though we're inside a function body, we still don't want to
10668 call expand_expr to calculate the size of a variable-sized array.
10669 We haven't necessarily assigned RTL to all variables yet, so it's
10670 not safe to try to expand expressions involving them. */
10671 cfun
->x_dont_save_pending_sizes_p
= 1;
10673 /* Start the statement-tree, start the tree now. */
10674 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
10676 /* If we are (erroneously) defining a function that we have already
10677 defined before, wipe out what we knew before. */
10678 if (!DECL_PENDING_INLINE_P (decl1
))
10679 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
10681 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
10683 /* We know that this was set up by `grokclassfn'. We do not
10684 wait until `store_parm_decls', since evil parse errors may
10685 never get us to that point. Here we keep the consistency
10686 between `current_class_type' and `current_class_ptr'. */
10687 tree t
= DECL_ARGUMENTS (decl1
);
10689 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
10690 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
10692 cp_function_chain
->x_current_class_ref
10693 = build_indirect_ref (t
, NULL
);
10694 cp_function_chain
->x_current_class_ptr
= t
;
10696 /* Constructors and destructors need to know whether they're "in
10697 charge" of initializing virtual base classes. */
10698 t
= TREE_CHAIN (t
);
10699 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
10701 current_in_charge_parm
= t
;
10702 t
= TREE_CHAIN (t
);
10704 if (DECL_HAS_VTT_PARM_P (decl1
))
10706 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
10707 current_vtt_parm
= t
;
10711 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
10712 /* Implicitly-defined methods (like the
10713 destructor for a class in which no destructor
10714 is explicitly declared) must not be defined
10715 until their definition is needed. So, we
10716 ignore interface specifications for
10717 compiler-generated functions. */
10718 && !DECL_ARTIFICIAL (decl1
));
10720 if (DECL_INTERFACE_KNOWN (decl1
))
10722 tree ctx
= decl_function_context (decl1
);
10724 if (DECL_NOT_REALLY_EXTERN (decl1
))
10725 DECL_EXTERNAL (decl1
) = 0;
10727 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
10728 && TREE_PUBLIC (ctx
))
10729 /* This is a function in a local class in an extern inline
10731 comdat_linkage (decl1
);
10733 /* If this function belongs to an interface, it is public.
10734 If it belongs to someone else's interface, it is also external.
10735 This only affects inlines and template instantiations. */
10736 else if (!finfo
->interface_unknown
&& honor_interface
)
10738 if (DECL_DECLARED_INLINE_P (decl1
)
10739 || DECL_TEMPLATE_INSTANTIATION (decl1
)
10740 || processing_template_decl
)
10742 DECL_EXTERNAL (decl1
)
10743 = (finfo
->interface_only
10744 || (DECL_DECLARED_INLINE_P (decl1
)
10745 && ! flag_implement_inlines
10746 && !DECL_VINDEX (decl1
)));
10748 /* For WIN32 we also want to put these in linkonce sections. */
10749 maybe_make_one_only (decl1
);
10752 DECL_EXTERNAL (decl1
) = 0;
10753 DECL_INTERFACE_KNOWN (decl1
) = 1;
10754 /* If this function is in an interface implemented in this file,
10755 make sure that the back end knows to emit this function
10757 if (!DECL_EXTERNAL (decl1
))
10758 mark_needed (decl1
);
10760 else if (finfo
->interface_unknown
&& finfo
->interface_only
10761 && honor_interface
)
10763 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10764 interface, we will have both finfo->interface_unknown and
10765 finfo->interface_only set. In that case, we don't want to
10766 use the normal heuristics because someone will supply a
10767 #pragma implementation elsewhere, and deducing it here would
10768 produce a conflict. */
10769 comdat_linkage (decl1
);
10770 DECL_EXTERNAL (decl1
) = 0;
10771 DECL_INTERFACE_KNOWN (decl1
) = 1;
10772 DECL_DEFER_OUTPUT (decl1
) = 1;
10776 /* This is a definition, not a reference.
10777 So clear DECL_EXTERNAL. */
10778 DECL_EXTERNAL (decl1
) = 0;
10780 if ((DECL_DECLARED_INLINE_P (decl1
)
10781 || DECL_TEMPLATE_INSTANTIATION (decl1
))
10782 && ! DECL_INTERFACE_KNOWN (decl1
)
10783 /* Don't try to defer nested functions for now. */
10784 && ! decl_function_context (decl1
))
10785 DECL_DEFER_OUTPUT (decl1
) = 1;
10787 DECL_INTERFACE_KNOWN (decl1
) = 1;
10790 /* Determine the ELF visibility attribute for the function. We must not
10791 do this before calling "pushdecl", as we must allow "duplicate_decls"
10792 to merge any attributes appropriately. We also need to wait until
10794 if (!DECL_CLONED_FUNCTION_P (decl1
))
10795 determine_visibility (decl1
);
10797 begin_scope (sk_function_parms
, decl1
);
10801 if (DECL_DESTRUCTOR_P (decl1
)
10802 || (DECL_CONSTRUCTOR_P (decl1
)
10803 && targetm
.cxx
.cdtor_returns_this ()))
10805 cdtor_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
10806 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
10809 start_fname_decls ();
10811 store_parm_decls (current_function_parms
);
10815 /* Like start_preparsed_function, except that instead of a
10816 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10818 Returns 1 on success. If the DECLARATOR is not suitable for a function
10819 (it defines a datum instead), we return 0, which tells
10820 yyparse to report a parse error. */
10823 start_function (cp_decl_specifier_seq
*declspecs
,
10824 const cp_declarator
*declarator
,
10829 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
10830 /* If the declarator is not suitable for a function definition,
10831 cause a syntax error. */
10832 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
10835 if (DECL_MAIN_P (decl1
))
10836 /* main must return int. grokfndecl should have corrected it
10837 (and issued a diagnostic) if the user got it wrong. */
10838 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
10839 integer_type_node
));
10841 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
10846 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10850 use_eh_spec_block (tree fn
)
10852 return (flag_exceptions
&& flag_enforce_eh_specs
10853 && !processing_template_decl
10854 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn
))
10855 /* We insert the EH_SPEC_BLOCK only in the original
10856 function; then, it is copied automatically to the
10858 && !DECL_CLONED_FUNCTION_P (fn
)
10859 /* Implicitly-generated constructors and destructors have
10860 exception specifications. However, those specifications
10861 are the union of the possible exceptions specified by the
10862 constructors/destructors for bases and members, so no
10863 unallowed exception will ever reach this function. By
10864 not creating the EH_SPEC_BLOCK we save a little memory,
10865 and we avoid spurious warnings about unreachable
10867 && !DECL_ARTIFICIAL (fn
));
10870 /* Store the parameter declarations into the current function declaration.
10871 This is called after parsing the parameter declarations, before
10872 digesting the body of the function.
10874 Also install to binding contour return value identifier, if any. */
10877 store_parm_decls (tree current_function_parms
)
10879 tree fndecl
= current_function_decl
;
10882 /* This is a chain of any other decls that came in among the parm
10883 declarations. If a parm is declared with enum {foo, bar} x;
10884 then CONST_DECLs for foo and bar are put here. */
10885 tree nonparms
= NULL_TREE
;
10887 if (current_function_parms
)
10889 /* This case is when the function was defined with an ANSI prototype.
10890 The parms already have decls, so we need not do anything here
10891 except record them as in effect
10892 and complain if any redundant old-style parm decls were written. */
10894 tree specparms
= current_function_parms
;
10897 /* Must clear this because it might contain TYPE_DECLs declared
10899 current_binding_level
->names
= NULL
;
10901 /* If we're doing semantic analysis, then we'll call pushdecl
10902 for each of these. We must do them in reverse order so that
10903 they end in the correct forward order. */
10904 specparms
= nreverse (specparms
);
10906 for (parm
= specparms
; parm
; parm
= next
)
10908 next
= TREE_CHAIN (parm
);
10909 if (TREE_CODE (parm
) == PARM_DECL
)
10911 if (DECL_NAME (parm
) == NULL_TREE
10912 || TREE_CODE (parm
) != VOID_TYPE
)
10915 error ("parameter %qD declared void", parm
);
10919 /* If we find an enum constant or a type tag,
10920 put it aside for the moment. */
10921 TREE_CHAIN (parm
) = NULL_TREE
;
10922 nonparms
= chainon (nonparms
, parm
);
10926 /* Get the decls in their original chain order and record in the
10927 function. This is all and only the PARM_DECLs that were
10928 pushed into scope by the loop above. */
10929 DECL_ARGUMENTS (fndecl
) = getdecls ();
10932 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
10934 /* Now store the final chain of decls for the arguments
10935 as the decl-chain of the current lexical scope.
10936 Put the enumerators in as well, at the front so that
10937 DECL_ARGUMENTS is not modified. */
10938 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
10940 if (use_eh_spec_block (current_function_decl
))
10941 current_eh_spec_block
= begin_eh_spec_block ();
10945 /* We have finished doing semantic analysis on DECL, but have not yet
10946 generated RTL for its body. Save away our current state, so that
10947 when we want to generate RTL later we know what to do. */
10950 save_function_data (tree decl
)
10952 struct language_function
*f
;
10954 /* Save the language-specific per-function data so that we can
10955 get it back when we really expand this function. */
10956 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
10959 f
= GGC_NEW (struct language_function
);
10960 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
10961 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
10963 /* Clear out the bits we don't need. */
10964 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL_TREE
;
10965 f
->bindings
= NULL
;
10966 f
->x_local_names
= NULL
;
10970 /* Set the return value of the constructor (if present). */
10973 finish_constructor_body (void)
10978 if (targetm
.cxx
.cdtor_returns_this ())
10980 /* Any return from a constructor will end up here. */
10981 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
10983 val
= DECL_ARGUMENTS (current_function_decl
);
10984 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
10985 DECL_RESULT (current_function_decl
), val
);
10986 /* Return the address of the object. */
10987 exprstmt
= build_stmt (RETURN_EXPR
, val
);
10988 add_stmt (exprstmt
);
10992 /* Do all the processing for the beginning of a destructor; set up the
10993 vtable pointers and cleanups for bases and members. */
10996 begin_destructor_body (void)
10998 tree compound_stmt
;
11000 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11001 issued an error message. We still want to try to process the
11002 body of the function, but initialize_vtbl_ptrs will crash if
11003 TYPE_BINFO is NULL. */
11004 if (COMPLETE_TYPE_P (current_class_type
))
11006 compound_stmt
= begin_compound_stmt (0);
11007 /* Make all virtual function table pointers in non-virtual base
11008 classes point to CURRENT_CLASS_TYPE's virtual function
11010 initialize_vtbl_ptrs (current_class_ptr
);
11011 finish_compound_stmt (compound_stmt
);
11013 /* And insert cleanups for our bases and members so that they
11014 will be properly destroyed if we throw. */
11015 push_base_cleanups ();
11019 /* At the end of every destructor we generate code to delete the object if
11020 necessary. Do that now. */
11023 finish_destructor_body (void)
11027 /* Any return from a destructor will end up here; that way all base
11028 and member cleanups will be run when the function returns. */
11029 add_stmt (build_stmt (LABEL_EXPR
, cdtor_label
));
11031 /* In a virtual destructor, we must call delete. */
11032 if (DECL_VIRTUAL_P (current_function_decl
))
11035 tree virtual_size
= cxx_sizeof (current_class_type
);
11039 At the point of definition of a virtual destructor (including
11040 an implicit definition), non-placement operator delete shall
11041 be looked up in the scope of the destructor's class and if
11042 found shall be accessible and unambiguous. */
11043 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
11045 /*global_p=*/false,
11046 /*placement=*/NULL_TREE
,
11047 /*alloc_fn=*/NULL_TREE
);
11049 if_stmt
= begin_if_stmt ();
11050 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
11051 current_in_charge_parm
,
11054 finish_expr_stmt (exprstmt
);
11055 finish_then_clause (if_stmt
);
11056 finish_if_stmt (if_stmt
);
11059 if (targetm
.cxx
.cdtor_returns_this ())
11063 val
= DECL_ARGUMENTS (current_function_decl
);
11064 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
11065 DECL_RESULT (current_function_decl
), val
);
11066 /* Return the address of the object. */
11067 exprstmt
= build_stmt (RETURN_EXPR
, val
);
11068 add_stmt (exprstmt
);
11072 /* Do the necessary processing for the beginning of a function body, which
11073 in this case includes member-initializers, but not the catch clauses of
11074 a function-try-block. Currently, this means opening a binding level
11075 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11078 begin_function_body (void)
11082 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
11085 if (processing_template_decl
)
11086 /* Do nothing now. */;
11088 /* Always keep the BLOCK node associated with the outermost pair of
11089 curly braces of a function. These are needed for correct
11090 operation of dwarfout.c. */
11091 keep_next_level (true);
11093 stmt
= begin_compound_stmt (BCS_FN_BODY
);
11095 if (processing_template_decl
)
11096 /* Do nothing now. */;
11097 else if (DECL_DESTRUCTOR_P (current_function_decl
))
11098 begin_destructor_body ();
11103 /* Do the processing for the end of a function body. Currently, this means
11104 closing out the cleanups for fully-constructed bases and members, and in
11105 the case of the destructor, deleting the object if desired. Again, this
11106 is only meaningful for [cd]tors, since they are the only functions where
11107 there is a significant distinction between the main body and any
11108 function catch clauses. Handling, say, main() return semantics here
11109 would be wrong, as flowing off the end of a function catch clause for
11110 main() would also need to return 0. */
11113 finish_function_body (tree compstmt
)
11115 if (compstmt
== NULL_TREE
)
11118 /* Close the block. */
11119 finish_compound_stmt (compstmt
);
11121 if (processing_template_decl
)
11122 /* Do nothing now. */;
11123 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
11124 finish_constructor_body ();
11125 else if (DECL_DESTRUCTOR_P (current_function_decl
))
11126 finish_destructor_body ();
11129 /* Given a function, returns the BLOCK corresponding to the outermost level
11130 of curly braces, skipping the artificial block created for constructor
11134 outer_curly_brace_block (tree fndecl
)
11136 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
11137 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
11138 /* Skip the artificial function body block. */
11139 block
= BLOCK_SUBBLOCKS (block
);
11143 /* Finish up a function declaration and compile that function
11144 all the way to assembler language output. The free the storage
11145 for the function definition.
11147 FLAGS is a bitwise or of the following values:
11149 We just finished processing the body of an in-class inline
11150 function definition. (This processing will have taken place
11151 after the class definition is complete.) */
11154 finish_function (int flags
)
11156 tree fndecl
= current_function_decl
;
11157 tree fntype
, ctype
= NULL_TREE
;
11158 int inclass_inline
= (flags
& 2) != 0;
11161 /* When we get some parse errors, we can end up without a
11162 current_function_decl, so cope. */
11163 if (fndecl
== NULL_TREE
)
11164 return error_mark_node
;
11166 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
11167 && DECL_VIRTUAL_P (fndecl
)
11168 && !processing_template_decl
)
11170 tree fnclass
= DECL_CONTEXT (fndecl
);
11171 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
11172 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
11175 nested
= function_depth
> 1;
11176 fntype
= TREE_TYPE (fndecl
);
11178 /* TREE_READONLY (fndecl) = 1;
11179 This caused &foo to be of type ptr-to-const-function
11180 which then got a warning when stored in a ptr-to-function variable. */
11182 gcc_assert (building_stmt_tree ());
11183 /* The current function is being defined, so its DECL_INITIAL should
11184 be set, and unless there's a multiple definition, it should be
11185 error_mark_node. */
11186 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
11188 /* For a cloned function, we've already got all the code we need;
11189 there's no need to add any extra bits. */
11190 if (!DECL_CLONED_FUNCTION_P (fndecl
))
11192 if (DECL_MAIN_P (current_function_decl
))
11196 /* Make it so that `main' always returns 0 by default (or
11199 stmt
= finish_return_stmt (integer_one_node
);
11201 stmt
= finish_return_stmt (integer_zero_node
);
11203 /* Hack. We don't want the middle-end to warn that this
11204 return is unreachable, so put the statement on the
11206 #ifdef USE_MAPPED_LOCATION
11207 SET_EXPR_LOCATION (stmt
, UNKNOWN_LOCATION
);
11209 annotate_with_file_line (stmt
, input_filename
, 0);
11213 if (use_eh_spec_block (current_function_decl
))
11214 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11215 (TREE_TYPE (current_function_decl
)),
11216 current_eh_spec_block
);
11219 /* If we're saving up tree structure, tie off the function now. */
11220 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
11222 finish_fname_decls ();
11224 /* If this function can't throw any exceptions, remember that. */
11225 if (!processing_template_decl
11226 && !cp_function_chain
->can_throw
11227 && !flag_non_call_exceptions
11228 && !DECL_REPLACEABLE_P (fndecl
))
11229 TREE_NOTHROW (fndecl
) = 1;
11231 /* This must come after expand_function_end because cleanups might
11232 have declarations (from inline functions) that need to go into
11233 this function's blocks. */
11235 /* If the current binding level isn't the outermost binding level
11236 for this function, either there is a bug, or we have experienced
11237 syntax errors and the statement tree is malformed. */
11238 if (current_binding_level
->kind
!= sk_function_parms
)
11240 /* Make sure we have already experienced errors. */
11241 gcc_assert (errorcount
);
11243 /* Throw away the broken statement tree and extra binding
11245 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
11247 while (current_binding_level
->kind
!= sk_function_parms
)
11249 if (current_binding_level
->kind
== sk_class
)
11250 pop_nested_class ();
11252 poplevel (0, 0, 0);
11255 poplevel (1, 0, 1);
11257 /* Statements should always be full-expressions at the outermost set
11258 of curly braces for a function. */
11259 gcc_assert (stmts_are_full_exprs_p ());
11261 /* Set up the named return value optimization, if we can. Candidate
11262 variables are selected in check_return_value. */
11263 if (current_function_return_value
)
11265 tree r
= current_function_return_value
;
11268 if (r
!= error_mark_node
11269 /* This is only worth doing for fns that return in memory--and
11270 simpler, since we don't have to worry about promoted modes. */
11271 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
11272 /* Only allow this for variables declared in the outer scope of
11273 the function so we know that their lifetime always ends with a
11274 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11275 we were to do this optimization in tree-ssa. */
11276 && (outer
= outer_curly_brace_block (fndecl
))
11277 && chain_member (r
, BLOCK_VARS (outer
)))
11278 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
11280 current_function_return_value
= NULL_TREE
;
11283 /* Remember that we were in class scope. */
11284 if (current_class_name
)
11285 ctype
= current_class_type
;
11287 /* Must mark the RESULT_DECL as being in this function. */
11288 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
11290 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11291 to the FUNCTION_DECL node itself. */
11292 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
11294 /* Save away current state, if appropriate. */
11295 if (!processing_template_decl
)
11296 save_function_data (fndecl
);
11298 /* Complain if there's just no return statement. */
11299 if (warn_return_type
11300 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
11301 && !dependent_type_p (TREE_TYPE (fntype
))
11302 && !current_function_returns_value
&& !current_function_returns_null
11303 /* Don't complain if we abort or throw. */
11304 && !current_function_returns_abnormally
11305 && !DECL_NAME (DECL_RESULT (fndecl
))
11306 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11307 inline function, as we might never be compiled separately. */
11308 && (DECL_INLINE (fndecl
) || processing_template_decl
)
11309 /* Structor return values (if any) are set by the compiler. */
11310 && !DECL_CONSTRUCTOR_P (fndecl
)
11311 && !DECL_DESTRUCTOR_P (fndecl
))
11312 warning (OPT_Wreturn_type
, "no return statement in function returning non-void");
11314 /* Store the end of the function, so that we get good line number
11315 info for the epilogue. */
11316 cfun
->function_end_locus
= input_location
;
11318 /* Genericize before inlining. */
11319 if (!processing_template_decl
)
11321 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
11322 cp_genericize (fndecl
);
11323 /* Clear out the bits we don't need. */
11324 f
->x_current_class_ptr
= NULL
;
11325 f
->x_current_class_ref
= NULL
;
11326 f
->x_eh_spec_block
= NULL
;
11327 f
->x_in_charge_parm
= NULL
;
11328 f
->x_vtt_parm
= NULL
;
11329 f
->x_return_value
= NULL
;
11330 f
->bindings
= NULL
;
11331 f
->extern_decl_map
= NULL
;
11333 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11334 c_warn_unused_result (&DECL_SAVED_TREE (fndecl
));
11336 /* Clear out the bits we don't need. */
11337 local_names
= NULL
;
11339 /* We're leaving the context of this function, so zap cfun. It's still in
11340 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11342 current_function_decl
= NULL
;
11344 /* If this is an in-class inline definition, we may have to pop the
11345 bindings for the template parameters that we added in
11346 maybe_begin_member_template_processing when start_function was
11348 if (inclass_inline
)
11349 maybe_end_member_template_processing ();
11351 /* Leave the scope of the class. */
11353 pop_nested_class ();
11359 /* Let the error reporting routines know that we're outside a
11360 function. For a nested function, this value is used in
11361 cxx_pop_function_context and then reset via pop_function_context. */
11362 current_function_decl
= NULL_TREE
;
11367 /* Create the FUNCTION_DECL for a function definition.
11368 DECLSPECS and DECLARATOR are the parts of the declaration;
11369 they describe the return type and the name of the function,
11370 but twisted together in a fashion that parallels the syntax of C.
11372 This function creates a binding context for the function body
11373 as well as setting up the FUNCTION_DECL in current_function_decl.
11375 Returns a FUNCTION_DECL on success.
11377 If the DECLARATOR is not suitable for a function (it defines a datum
11378 instead), we return 0, which tells yyparse to report a parse error.
11380 May return void_type_node indicating that this method is actually
11381 a friend. See grokfield for more details.
11383 Came here with a `.pushlevel' .
11385 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11386 CHANGES TO CODE IN `grokfield'. */
11389 start_method (cp_decl_specifier_seq
*declspecs
,
11390 const cp_declarator
*declarator
, tree attrlist
)
11392 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
11395 if (fndecl
== error_mark_node
)
11396 return error_mark_node
;
11398 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
11400 error ("invalid member function declaration");
11401 return error_mark_node
;
11405 cplus_decl_attributes (&fndecl
, attrlist
, 0);
11407 /* Pass friends other than inline friend functions back. */
11408 if (fndecl
== void_type_node
)
11411 if (DECL_IN_AGGR_P (fndecl
))
11413 if (DECL_CONTEXT (fndecl
)
11414 && TREE_CODE (DECL_CONTEXT (fndecl
)) != NAMESPACE_DECL
)
11415 error ("%qD is already defined in class %qT", fndecl
,
11416 DECL_CONTEXT (fndecl
));
11417 return error_mark_node
;
11420 check_template_shadow (fndecl
);
11422 DECL_DECLARED_INLINE_P (fndecl
) = 1;
11423 if (flag_default_inline
)
11424 DECL_INLINE (fndecl
) = 1;
11426 /* We process method specializations in finish_struct_1. */
11427 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
11429 fndecl
= push_template_decl (fndecl
);
11430 if (fndecl
== error_mark_node
)
11434 if (! DECL_FRIEND_P (fndecl
))
11436 if (TREE_CHAIN (fndecl
))
11438 fndecl
= copy_node (fndecl
);
11439 TREE_CHAIN (fndecl
) = NULL_TREE
;
11443 finish_decl (fndecl
, NULL_TREE
, NULL_TREE
);
11445 /* Make a place for the parms. */
11446 begin_scope (sk_function_parms
, fndecl
);
11448 DECL_IN_AGGR_P (fndecl
) = 1;
11452 /* Go through the motions of finishing a function definition.
11453 We don't compile this method until after the whole class has
11456 FINISH_METHOD must return something that looks as though it
11457 came from GROKFIELD (since we are defining a method, after all).
11459 This is called after parsing the body of the function definition.
11460 STMTS is the chain of statements that makes up the function body.
11462 DECL is the ..._DECL that `start_method' provided. */
11465 finish_method (tree decl
)
11467 tree fndecl
= decl
;
11472 if (decl
== void_type_node
)
11475 old_initial
= DECL_INITIAL (fndecl
);
11477 /* Undo the level for the parms (from start_method).
11478 This is like poplevel, but it causes nothing to be
11479 saved. Saving information here confuses symbol-table
11480 output routines. Besides, this information will
11481 be correctly output when this method is actually
11484 /* Clear out the meanings of the local variables of this level;
11485 also record in each decl which block it belongs to. */
11487 for (link
= current_binding_level
->names
; link
; link
= TREE_CHAIN (link
))
11489 if (DECL_NAME (link
) != NULL_TREE
)
11490 pop_binding (DECL_NAME (link
), link
);
11491 gcc_assert (TREE_CODE (link
) != FUNCTION_DECL
);
11492 DECL_CONTEXT (link
) = NULL_TREE
;
11495 poplevel (0, 0, 0);
11497 DECL_INITIAL (fndecl
) = old_initial
;
11499 /* We used to check if the context of FNDECL was different from
11500 current_class_type as another way to get inside here. This didn't work
11501 for String.cc in libg++. */
11502 if (DECL_FRIEND_P (fndecl
))
11504 VEC_safe_push (tree
, gc
, CLASSTYPE_INLINE_FRIENDS (current_class_type
),
11506 decl
= void_type_node
;
11513 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11514 we can lay it out later, when and if its type becomes complete. */
11517 maybe_register_incomplete_var (tree var
)
11519 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
11521 /* Keep track of variables with incomplete types. */
11522 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
11523 && DECL_EXTERNAL (var
))
11525 tree inner_type
= TREE_TYPE (var
);
11527 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
11528 inner_type
= TREE_TYPE (inner_type
);
11529 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
11531 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
11532 /* RTTI TD entries are created while defining the type_info. */
11533 || (TYPE_LANG_SPECIFIC (inner_type
)
11534 && TYPE_BEING_DEFINED (inner_type
)))
11535 incomplete_vars
= tree_cons (inner_type
, var
, incomplete_vars
);
11539 /* Called when a class type (given by TYPE) is defined. If there are
11540 any existing VAR_DECLs whose type hsa been completed by this
11541 declaration, update them now. */
11544 complete_vars (tree type
)
11546 tree
*list
= &incomplete_vars
;
11548 gcc_assert (CLASS_TYPE_P (type
));
11551 if (same_type_p (type
, TREE_PURPOSE (*list
)))
11553 tree var
= TREE_VALUE (*list
);
11554 tree type
= TREE_TYPE (var
);
11555 /* Complete the type of the variable. The VAR_DECL itself
11556 will be laid out in expand_expr. */
11557 complete_type (type
);
11558 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
11559 /* Remove this entry from the list. */
11560 *list
= TREE_CHAIN (*list
);
11563 list
= &TREE_CHAIN (*list
);
11566 /* Check for pending declarations which may have abstract type. */
11567 complete_type_check_abstract (type
);
11570 /* If DECL is of a type which needs a cleanup, build that cleanup
11574 cxx_maybe_build_cleanup (tree decl
)
11576 tree type
= TREE_TYPE (decl
);
11578 if (type
!= error_mark_node
&& TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
11580 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
11582 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
11583 && CLASSTYPE_VBASECLASSES (type
));
11585 if (TREE_CODE (type
) == ARRAY_TYPE
)
11589 cxx_mark_addressable (decl
);
11590 rval
= build_unary_op (ADDR_EXPR
, decl
, 0);
11593 /* Optimize for space over speed here. */
11594 if (!has_vbases
|| flag_expensive_optimizations
)
11595 flags
|= LOOKUP_NONVIRTUAL
;
11597 rval
= build_delete (TREE_TYPE (rval
), rval
,
11598 sfk_complete_destructor
, flags
, 0);
11605 /* When a stmt has been parsed, this function is called. */
11612 /* DECL was originally constructed as a non-static member function,
11613 but turned out to be static. Update it accordingly. */
11616 revert_static_member_fn (tree decl
)
11619 tree function
= TREE_TYPE (decl
);
11620 tree args
= TYPE_ARG_TYPES (function
);
11622 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args
)))
11623 != TYPE_UNQUALIFIED
)
11624 error ("static member function %q#D declared with type qualifiers", decl
);
11626 args
= TREE_CHAIN (args
);
11627 tmp
= build_function_type (TREE_TYPE (function
), args
);
11628 tmp
= build_qualified_type (tmp
, cp_type_quals (function
));
11629 tmp
= build_exception_variant (tmp
,
11630 TYPE_RAISES_EXCEPTIONS (function
));
11631 TREE_TYPE (decl
) = tmp
;
11632 if (DECL_ARGUMENTS (decl
))
11633 DECL_ARGUMENTS (decl
) = TREE_CHAIN (DECL_ARGUMENTS (decl
));
11634 DECL_STATIC_FUNCTION_P (decl
) = 1;
11637 /* Initialize the variables used during compilation of a C++
11641 cxx_push_function_context (struct function
* f
)
11643 struct language_function
*p
= GGC_CNEW (struct language_function
);
11646 /* Whenever we start a new function, we destroy temporaries in the
11648 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
11654 if (DECL_SAVED_FUNCTION_DATA (fn
))
11656 /* If we already parsed this function, and we're just expanding it
11657 now, restore saved state. */
11658 *cp_function_chain
= *DECL_SAVED_FUNCTION_DATA (fn
);
11660 /* We don't need the saved data anymore. Unless this is an inline
11661 function; we need the named return value info for
11662 declare_return_variable. */
11663 if (! DECL_INLINE (fn
))
11664 DECL_SAVED_FUNCTION_DATA (fn
) = NULL
;
11669 /* Free the language-specific parts of F, now that we've finished
11670 compiling the function. */
11673 cxx_pop_function_context (struct function
* f
)
11678 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11679 one of the language-independent trees. */
11681 enum cp_tree_node_structure_enum
11682 cp_tree_node_structure (union lang_tree_node
* t
)
11684 switch (TREE_CODE (&t
->generic
))
11686 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
11687 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
11688 case OVERLOAD
: return TS_CP_OVERLOAD
;
11689 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
11690 case TINST_LEVEL
: return TS_CP_TINST_LEVEL
;
11691 case PTRMEM_CST
: return TS_CP_PTRMEM
;
11692 case BASELINK
: return TS_CP_BASELINK
;
11693 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
11694 default: return TS_CP_GENERIC
;
11698 /* Build the void_list_node (void_type_node having been created). */
11700 build_void_list_node (void)
11702 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
11707 cp_missing_noreturn_ok_p (tree decl
)
11709 /* A missing noreturn is ok for the `main' function. */
11710 return DECL_MAIN_P (decl
);
11713 /* Return the COMDAT group into which DECL should be placed. */
11716 cxx_comdat_group (tree decl
)
11720 /* Virtual tables, construction virtual tables, and virtual table
11721 tables all go in a single COMDAT group, named after the primary
11723 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
11724 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
11725 /* For all other DECLs, the COMDAT group is the mangled name of the
11726 declaration itself. */
11729 while (DECL_THUNK_P (decl
))
11731 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11732 into the same section as the target function. In that case
11733 we must return target's name. */
11734 tree target
= THUNK_TARGET (decl
);
11735 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
11736 && DECL_SECTION_NAME (target
) != NULL
11737 && DECL_ONE_ONLY (target
))
11742 name
= DECL_ASSEMBLER_NAME (decl
);
11745 return IDENTIFIER_POINTER (name
);
11748 #include "gt-cp-decl.h"