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 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, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, 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"
53 #include "tree-flow.h"
55 static tree
grokparms (cp_parameter_declarator
*, tree
*);
56 static const char *redeclaration_error_message (tree
, tree
);
58 static int decl_jump_unsafe (tree
);
59 static void require_complete_types_for_parms (tree
);
60 static int ambi_op_p (enum tree_code
);
61 static int unary_op_p (enum tree_code
);
62 static void push_local_name (tree
);
63 static tree
grok_reference_init (tree
, tree
, tree
, tree
*);
64 static tree
grokfndecl (tree
, tree
, tree
, tree
, tree
, int,
65 enum overload_flags
, cp_cv_quals
,
66 tree
, int, int, int, int, int, int, tree
);
67 static tree
grokvardecl (tree
, tree
, cp_decl_specifier_seq
*, int, int, tree
);
68 static void record_unknown_type (tree
, const char *);
69 static tree
builtin_function_1 (const char *, tree
, tree
, int,
70 enum built_in_class
, const char *,
72 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
73 static int member_function_or_else (tree
, tree
, enum overload_flags
);
74 static void bad_specifiers (tree
, const char *, int, int, int, int,
76 static void check_for_uninitialized_const_var (tree
);
77 static hashval_t
typename_hash (const void *);
78 static int typename_compare (const void *, const void *);
79 static tree
local_variable_p_walkfn (tree
*, int *, void *);
80 static tree
record_builtin_java_type (const char *, int);
81 static const char *tag_name (enum tag_types code
);
82 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
83 static int walk_globals_r (tree
, void*);
84 static int walk_vtables_r (tree
, void*);
85 static tree
make_label_decl (tree
, int);
86 static void use_label (tree
);
87 static void check_previous_goto_1 (tree
, struct cp_binding_level
*, tree
,
89 static void check_previous_goto (struct named_label_use_list
*);
90 static void check_switch_goto (struct cp_binding_level
*);
91 static void check_previous_gotos (tree
);
92 static void pop_label (tree
, tree
);
93 static void pop_labels (tree
);
94 static void maybe_deduce_size_from_array_init (tree
, tree
);
95 static void layout_var_decl (tree
);
96 static void maybe_commonize_var (tree
);
97 static tree
check_initializer (tree
, tree
, int, tree
*);
98 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
99 static void save_function_data (tree
);
100 static void check_function_type (tree
, tree
);
101 static void begin_constructor_body (void);
102 static void finish_constructor_body (void);
103 static void begin_destructor_body (void);
104 static void finish_destructor_body (void);
105 static tree
create_array_type_for_decl (tree
, tree
, tree
);
106 static tree
get_atexit_node (void);
107 static tree
get_dso_handle_node (void);
108 static tree
start_cleanup_fn (void);
109 static void end_cleanup_fn (void);
110 static tree
cp_make_fname_decl (tree
, int);
111 static void initialize_predefined_identifiers (void);
112 static tree check_special_function_return_type
113 (special_function_kind
, tree
, tree
);
114 static tree
push_cp_library_fn (enum tree_code
, tree
);
115 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
116 static void store_parm_decls (tree
);
117 static void initialize_local_var (tree
, tree
);
118 static void expand_static_init (tree
, tree
);
119 static tree
next_initializable_field (tree
);
120 static tree
reshape_init (tree
, tree
*);
121 static tree
build_typename_type (tree
, tree
, tree
);
123 /* Erroneous argument lists can use this *IFF* they do not modify it. */
124 tree error_mark_list
;
126 /* The following symbols are subsumed in the cp_global_trees array, and
127 listed here individually for documentation purposes.
130 tree wchar_decl_node;
132 tree vtable_entry_type;
133 tree delta_type_node;
134 tree __t_desc_type_node;
135 tree ti_desc_type_node;
136 tree bltn_desc_type_node, ptr_desc_type_node;
137 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
138 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
139 tree ptm_desc_type_node;
140 tree base_desc_type_node;
142 tree class_type_node;
143 tree unknown_type_node;
145 Array type `vtable_entry_type[]'
148 tree vtbl_ptr_type_node;
155 A FUNCTION_DECL which can call `abort'. Not necessarily the
156 one that the user will declare, but sufficient to be called
157 by routines that want to abort the program.
161 The FUNCTION_DECL for the default `::operator delete'.
163 tree global_delete_fndecl;
166 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
171 tree cp_global_trees
[CPTI_MAX
];
173 /* Indicates that there is a type value in some namespace, although
174 that is not necessarily in scope at the moment. */
176 tree global_type_node
;
178 /* The node that holds the "name" of the global scope. */
179 tree global_scope_name
;
181 /* Used only for jumps to as-yet undefined labels, since jumps to
182 defined labels can have their validity checked immediately. */
184 struct named_label_use_list
GTY(())
186 struct cp_binding_level
*binding_level
;
189 location_t o_goto_locus
;
190 struct named_label_use_list
*next
;
193 #define named_label_uses cp_function_chain->x_named_label_uses
195 #define local_names cp_function_chain->x_local_names
197 /* A list of objects which have constructors or destructors
198 which reside in the global scope. The decl is stored in
199 the TREE_VALUE slot and the initializer is stored
200 in the TREE_PURPOSE slot. */
201 tree static_aggregates
;
205 /* A node for the integer constants 2, and 3. */
207 tree integer_two_node
, integer_three_node
;
209 /* A list of all LABEL_DECLs in the function that have names. Here so
210 we can clear out their names' definitions at the end of the
211 function, and so we can check the validity of jumps to these labels. */
213 struct named_label_list
GTY(())
215 struct cp_binding_level
*binding_level
;
220 struct named_label_list
*next
;
221 unsigned int in_try_scope
: 1;
222 unsigned int in_catch_scope
: 1;
225 #define named_labels cp_function_chain->x_named_labels
227 /* The number of function bodies which we are currently processing.
228 (Zero if we are at namespace scope, one inside the body of a
229 function, two inside the body of a function in a local class, etc.) */
232 /* States indicating how grokdeclarator() should handle declspecs marked
233 with __attribute__((deprecated)). An object declared as
234 __attribute__((deprecated)) suppresses warnings of uses of other
237 enum deprecated_states
{
242 static enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
244 /* True if a declaration with an `extern' linkage specifier is being
246 bool have_extern_spec
;
249 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
250 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
251 time the VAR_DECL was declared, the type was incomplete. */
253 static GTY(()) tree incomplete_vars
;
255 /* Returns the kind of template specialization we are currently
256 processing, given that it's declaration contained N_CLASS_SCOPES
257 explicit scope qualifications. */
260 current_tmpl_spec_kind (int n_class_scopes
)
262 int n_template_parm_scopes
= 0;
263 int seen_specialization_p
= 0;
264 int innermost_specialization_p
= 0;
265 struct cp_binding_level
*b
;
267 /* Scan through the template parameter scopes. */
268 for (b
= current_binding_level
;
269 b
->kind
== sk_template_parms
;
272 /* If we see a specialization scope inside a parameter scope,
273 then something is wrong. That corresponds to a declaration
276 template <class T> template <> ...
278 which is always invalid since [temp.expl.spec] forbids the
279 specialization of a class member template if the enclosing
280 class templates are not explicitly specialized as well. */
281 if (b
->explicit_spec_p
)
283 if (n_template_parm_scopes
== 0)
284 innermost_specialization_p
= 1;
286 seen_specialization_p
= 1;
288 else if (seen_specialization_p
== 1)
289 return tsk_invalid_member_spec
;
291 ++n_template_parm_scopes
;
294 /* Handle explicit instantiations. */
295 if (processing_explicit_instantiation
)
297 if (n_template_parm_scopes
!= 0)
298 /* We've seen a template parameter list during an explicit
299 instantiation. For example:
301 template <class T> template void f(int);
303 This is erroneous. */
304 return tsk_invalid_expl_inst
;
306 return tsk_expl_inst
;
309 if (n_template_parm_scopes
< n_class_scopes
)
310 /* We've not seen enough template headers to match all the
311 specialized classes present. For example:
313 template <class T> void R<T>::S<T>::f(int);
315 This is invalid; there needs to be one set of template
316 parameters for each class. */
317 return tsk_insufficient_parms
;
318 else if (n_template_parm_scopes
== n_class_scopes
)
319 /* We're processing a non-template declaration (even though it may
320 be a member of a template class.) For example:
322 template <class T> void S<T>::f(int);
324 The `class T' maches the `S<T>', leaving no template headers
325 corresponding to the `f'. */
327 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
328 /* We've got too many template headers. For example:
330 template <> template <class T> void f (T);
332 There need to be more enclosing classes. */
333 return tsk_excessive_parms
;
335 /* This must be a template. It's of the form:
337 template <class T> template <class U> void S<T>::f(U);
339 This is a specialization if the innermost level was a
340 specialization; otherwise it's just a definition of the
342 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
345 /* Exit the current scope. */
353 /* When a label goes out of scope, check to see if that label was used
354 in a valid manner, and issue any appropriate warnings or errors. */
357 pop_label (tree label
, tree old_value
)
359 if (!processing_template_decl
)
361 if (DECL_INITIAL (label
) == NULL_TREE
)
365 cp_error_at ("label `%D' used but not defined", label
);
366 #ifdef USE_MAPPED_LOCATION
367 location
= input_location
; /* FIXME want (input_filename, (line)0) */
369 location
.file
= input_filename
;
372 /* Avoid crashing later. */
373 define_label (location
, DECL_NAME (label
));
375 else if (warn_unused_label
&& !TREE_USED (label
))
376 cp_warning_at ("label `%D' defined but not used", label
);
379 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
382 /* At the end of a function, all labels declared within the function
383 go out of scope. BLOCK is the top-level block for the
387 pop_labels (tree block
)
389 struct named_label_list
*link
;
391 /* Clear out the definitions of all label names, since their scopes
393 for (link
= named_labels
; link
; link
= link
->next
)
395 pop_label (link
->label_decl
, link
->old_value
);
396 /* Put the labels into the "variables" of the top-level block,
397 so debugger can see them. */
398 TREE_CHAIN (link
->label_decl
) = BLOCK_VARS (block
);
399 BLOCK_VARS (block
) = link
->label_decl
;
405 /* Exit a binding level.
406 Pop the level off, and restore the state of the identifier-decl mappings
407 that were in effect when this level was entered.
409 If KEEP == 1, this level had explicit declarations, so
410 and create a "block" (a BLOCK node) for the level
411 to record its declarations and subblocks for symbol table output.
413 If FUNCTIONBODY is nonzero, this level is the body of a function,
414 so create a block as if KEEP were set and also clear out all
417 If REVERSE is nonzero, reverse the order of decls before putting
418 them into the BLOCK. */
421 poplevel (int keep
, int reverse
, int functionbody
)
424 /* The chain of decls was accumulated in reverse order.
425 Put it into forward order, just for cleanliness. */
427 int tmp
= functionbody
;
428 int real_functionbody
;
432 int leaving_for_scope
;
435 timevar_push (TV_NAME_LOOKUP
);
440 my_friendly_assert (current_binding_level
->kind
!= sk_class
, 19990916);
442 real_functionbody
= (current_binding_level
->kind
== sk_cleanup
443 ? ((functionbody
= 0), tmp
) : functionbody
);
444 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
446 my_friendly_assert (!current_binding_level
->class_shadowed
,
449 /* We used to use KEEP == 2 to indicate that the new block should go
450 at the beginning of the list of blocks at this binding level,
451 rather than the end. This hack is no longer used. */
452 my_friendly_assert (keep
== 0 || keep
== 1, 0);
454 if (current_binding_level
->keep
)
457 /* Any uses of undefined labels, and any defined labels, now operate
458 under constraints of next binding contour. */
459 if (cfun
&& !functionbody
)
461 struct cp_binding_level
*level_chain
;
462 level_chain
= current_binding_level
->level_chain
;
465 struct named_label_use_list
*uses
;
466 struct named_label_list
*labels
;
467 for (labels
= named_labels
; labels
; labels
= labels
->next
)
468 if (labels
->binding_level
== current_binding_level
)
471 if (current_binding_level
->kind
== sk_try
)
472 labels
->in_try_scope
= 1;
473 if (current_binding_level
->kind
== sk_catch
)
474 labels
->in_catch_scope
= 1;
475 for (decl
= labels
->names_in_scope
; decl
;
476 decl
= TREE_CHAIN (decl
))
477 if (decl_jump_unsafe (decl
))
478 labels
->bad_decls
= tree_cons (NULL_TREE
, decl
,
480 labels
->binding_level
= level_chain
;
481 labels
->names_in_scope
= level_chain
->names
;
484 for (uses
= named_label_uses
; uses
; uses
= uses
->next
)
485 if (uses
->binding_level
== current_binding_level
)
487 uses
->binding_level
= level_chain
;
488 uses
->names_in_scope
= level_chain
->names
;
493 /* Get the decls in the order they were written.
494 Usually current_binding_level->names is in reverse order.
495 But parameter decls were previously put in forward order. */
498 current_binding_level
->names
499 = decls
= nreverse (current_binding_level
->names
);
501 decls
= current_binding_level
->names
;
503 /* When not in function-at-a-time mode, expand_end_bindings will
504 warn about unused variables. But, in function-at-a-time mode
505 expand_end_bindings is not passed the list of variables in the
506 current scope, and therefore no warning is emitted. So, we
507 explicitly warn here. */
508 if (!processing_template_decl
)
509 warn_about_unused_variables (getdecls ());
511 /* If there were any declarations or structure tags in that level,
512 or if this level is a function body,
513 create a BLOCK to record them for the life of this function. */
515 if (keep
== 1 || functionbody
)
516 block
= make_node (BLOCK
);
517 if (block
!= NULL_TREE
)
519 BLOCK_VARS (block
) = decls
;
520 BLOCK_SUBBLOCKS (block
) = subblocks
;
523 /* In each subblock, record that this is its superior. */
525 for (link
= subblocks
; link
; link
= TREE_CHAIN (link
))
526 BLOCK_SUPERCONTEXT (link
) = block
;
528 /* We still support the old for-scope rules, whereby the variables
529 in a for-init statement were in scope after the for-statement
530 ended. We only use the new rules if flag_new_for_scope is
533 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
535 /* Remove declarations for all the DECLs in this level. */
536 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
538 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
541 cxx_binding
*outer_binding
542 = IDENTIFIER_BINDING (DECL_NAME (link
))->previous
;
546 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (DECL_NAME (link
));
548 ns_binding
= NULL_TREE
;
551 && outer_binding
->scope
== current_binding_level
->level_chain
)
552 /* We have something like:
557 and we are leaving the `for' scope. There's no reason to
558 keep the binding of the inner `i' in this case. */
559 pop_binding (DECL_NAME (link
), link
);
560 else if ((outer_binding
561 && (TREE_CODE (outer_binding
->value
) == TYPE_DECL
))
562 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
563 /* Here, we have something like:
571 We must pop the for-scope binding so we know what's a
572 type and what isn't. */
573 pop_binding (DECL_NAME (link
), link
);
576 /* Mark this VAR_DECL as dead so that we can tell we left it
577 there only for backward compatibility. */
578 DECL_DEAD_FOR_LOCAL (link
) = 1;
580 /* Keep track of what should have happened when we
581 popped the binding. */
582 if (outer_binding
&& outer_binding
->value
)
583 DECL_SHADOWED_FOR_VAR (link
) = outer_binding
->value
;
585 /* Add it to the list of dead variables in the next
586 outermost binding to that we can remove these when we
587 leave that binding. */
588 current_binding_level
->level_chain
->dead_vars_from_for
589 = tree_cons (NULL_TREE
, link
,
590 current_binding_level
->level_chain
->
593 /* Although we don't pop the cxx_binding, we do clear
594 its SCOPE since the scope is going away now. */
595 IDENTIFIER_BINDING (DECL_NAME (link
))->scope
= NULL
;
600 /* Remove the binding. */
602 if (TREE_CODE (decl
) == TREE_LIST
)
603 decl
= TREE_VALUE (decl
);
605 pop_binding (DECL_NAME (decl
), decl
);
606 else if (TREE_CODE (decl
) == OVERLOAD
)
607 pop_binding (DECL_NAME (OVL_FUNCTION (decl
)), decl
);
613 /* Remove declarations for any `for' variables from inner scopes
614 that we kept around. */
615 for (link
= current_binding_level
->dead_vars_from_for
;
616 link
; link
= TREE_CHAIN (link
))
617 pop_binding (DECL_NAME (TREE_VALUE (link
)), TREE_VALUE (link
));
619 /* Restore the IDENTIFIER_TYPE_VALUEs. */
620 for (link
= current_binding_level
->type_shadowed
;
621 link
; link
= TREE_CHAIN (link
))
622 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
624 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
625 for (link
= current_binding_level
->shadowed_labels
;
627 link
= TREE_CHAIN (link
))
628 pop_label (TREE_VALUE (link
), TREE_PURPOSE (link
));
630 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
631 list if a `using' declaration put them there. The debugging
632 back-ends won't understand OVERLOAD, so we remove them here.
633 Because the BLOCK_VARS are (temporarily) shared with
634 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
635 popped all the bindings. */
640 for (d
= &BLOCK_VARS (block
); *d
; )
642 if (TREE_CODE (*d
) == TREE_LIST
)
643 *d
= TREE_CHAIN (*d
);
645 d
= &TREE_CHAIN (*d
);
649 /* If the level being exited is the top level of a function,
650 check over all the labels. */
653 /* Since this is the top level block of a function, the vars are
654 the function's parameters. Don't leave them in the BLOCK
655 because they are found in the FUNCTION_DECL instead. */
656 BLOCK_VARS (block
) = 0;
660 kind
= current_binding_level
->kind
;
661 if (kind
== sk_cleanup
)
665 /* If this is a temporary binding created for a cleanup, then we'll
666 have pushed a statement list level. Pop that, create a new
667 BIND_EXPR for the block, and insert it into the stream. */
668 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
669 stmt
= c_build_bind_expr (block
, stmt
);
675 DECL_INITIAL (current_function_decl
) = block
;
677 current_binding_level
->blocks
678 = chainon (current_binding_level
->blocks
, block
);
680 /* If we did not make a block for the level just exited,
681 any blocks made for inner levels
682 (since they cannot be recorded as subblocks in that level)
683 must be carried forward so they will later become subblocks
684 of something else. */
686 current_binding_level
->blocks
687 = chainon (current_binding_level
->blocks
, subblocks
);
689 /* Each and every BLOCK node created here in `poplevel' is important
690 (e.g. for proper debugging information) so if we created one
691 earlier, mark it as "used". */
693 TREE_USED (block
) = 1;
695 /* All temporary bindings created for cleanups are popped silently. */
696 if (kind
== sk_cleanup
)
699 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, block
);
702 /* Delete the node BLOCK from the current binding level.
703 This is used for the block inside a stmt expr ({...})
704 so that the block can be reinserted where appropriate. */
707 delete_block (tree block
)
710 if (current_binding_level
->blocks
== block
)
711 current_binding_level
->blocks
= TREE_CHAIN (block
);
712 for (t
= current_binding_level
->blocks
; t
;)
714 if (TREE_CHAIN (t
) == block
)
715 TREE_CHAIN (t
) = TREE_CHAIN (block
);
719 TREE_CHAIN (block
) = NULL_TREE
;
720 /* Clear TREE_USED which is always set by poplevel.
721 The flag is set again if insert_block is called. */
722 TREE_USED (block
) = 0;
725 /* Insert BLOCK at the end of the list of subblocks of the
726 current binding level. This is used when a BIND_EXPR is expanded,
727 to handle the BLOCK node inside the BIND_EXPR. */
730 insert_block (tree block
)
732 TREE_USED (block
) = 1;
733 current_binding_level
->blocks
734 = chainon (current_binding_level
->blocks
, block
);
737 /* Set the BLOCK node for the innermost scope
738 (the one we are currently in). */
741 set_block (tree block ATTRIBUTE_UNUSED
)
743 /* The RTL expansion machinery requires us to provide this callback,
744 but it is not applicable in function-at-a-time mode. */
747 /* Returns nonzero if T is a virtual function table. */
750 vtable_decl_p (tree t
, void* data ATTRIBUTE_UNUSED
)
752 return (TREE_CODE (t
) == VAR_DECL
&& DECL_VIRTUAL_P (t
));
755 /* Returns nonzero if T is a TYPE_DECL for a type with virtual
759 vtype_decl_p (tree t
, void *data ATTRIBUTE_UNUSED
)
761 return (TREE_CODE (t
) == TYPE_DECL
762 && TREE_CODE (TREE_TYPE (t
)) == RECORD_TYPE
763 && TYPE_POLYMORPHIC_P (TREE_TYPE (t
)));
766 struct walk_globals_data
{
772 /* Walk the vtable declarations in NAMESPACE. Whenever one is found
773 for which P returns nonzero, call F with its address. If any call
774 to F returns a nonzero value, return a nonzero value. */
777 walk_vtables_r (tree
namespace, void* data
)
779 struct walk_globals_data
* wgd
= (struct walk_globals_data
*) data
;
780 walk_globals_fn f
= wgd
->f
;
782 tree decl
= NAMESPACE_LEVEL (namespace)->vtables
;
785 for (; decl
; decl
= TREE_CHAIN (decl
))
786 result
|= (*f
) (&decl
, d
);
791 /* Walk the vtable declarations. Whenever one is found for which P
792 returns nonzero, call F with its address. If any call to F
793 returns a nonzero value, return a nonzero value. */
795 walk_vtables (walk_globals_pred p
, walk_globals_fn f
, void *data
)
797 struct walk_globals_data wgd
;
802 return walk_namespaces (walk_vtables_r
, &wgd
);
805 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
806 itself, calling F for each. The DATA is passed to F as well. */
809 walk_namespaces_r (tree
namespace, walk_namespaces_fn f
, void* data
)
812 tree current
= NAMESPACE_LEVEL (namespace)->namespaces
;
814 result
|= (*f
) (namespace, data
);
816 for (; current
; current
= TREE_CHAIN (current
))
817 result
|= walk_namespaces_r (current
, f
, data
);
822 /* Walk all the namespaces, calling F for each. The DATA is passed to
826 walk_namespaces (walk_namespaces_fn f
, void* data
)
828 return walk_namespaces_r (global_namespace
, f
, data
);
831 /* Walk the global declarations in NAMESPACE. Whenever one is found
832 for which P returns nonzero, call F with its address. If any call
833 to F returns a nonzero value, return a nonzero value. */
836 walk_globals_r (tree
namespace, void* data
)
838 struct walk_globals_data
* wgd
= (struct walk_globals_data
*) data
;
839 walk_globals_pred p
= wgd
->p
;
840 walk_globals_fn f
= wgd
->f
;
845 t
= &NAMESPACE_LEVEL (namespace)->names
;
852 result
|= (*f
) (t
, d
);
854 /* If F changed *T, then *T still points at the next item to
857 t
= &TREE_CHAIN (*t
);
863 /* Walk the global declarations. Whenever one is found for which P
864 returns true, call F with its address. If any call to F
865 returns true, return true. */
868 walk_globals (walk_globals_pred p
, walk_globals_fn f
, void *data
)
870 struct walk_globals_data wgd
;
875 return walk_namespaces (walk_globals_r
, &wgd
);
878 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
879 DATA is non-NULL, this is the last time we will call
880 wrapup_global_declarations for this NAMESPACE. */
883 wrapup_globals_for_namespace (tree
namespace, void* data
)
885 struct cp_binding_level
*level
= NAMESPACE_LEVEL (namespace);
886 varray_type statics
= level
->static_decls
;
887 tree
*vec
= &VARRAY_TREE (statics
, 0);
888 int len
= VARRAY_ACTIVE_SIZE (statics
);
889 int last_time
= (data
!= 0);
893 check_global_declarations (vec
, len
);
897 /* Write out any globals that need to be output. */
898 return wrapup_global_declarations (vec
, len
);
902 /* In C++, you don't have to write `struct S' to refer to `S'; you
903 can just use `S'. We accomplish this by creating a TYPE_DECL as
904 if the user had written `typedef struct S S'. Create and return
905 the TYPE_DECL for TYPE. */
908 create_implicit_typedef (tree name
, tree type
)
912 decl
= build_decl (TYPE_DECL
, name
, type
);
913 DECL_ARTIFICIAL (decl
) = 1;
914 /* There are other implicit type declarations, like the one *within*
915 a class that allows you to write `S::S'. We must distinguish
917 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
918 TYPE_NAME (type
) = decl
;
923 /* Remember a local name for name-mangling purposes. */
926 push_local_name (tree decl
)
931 timevar_push (TV_NAME_LOOKUP
);
933 VARRAY_TREE_INIT (local_names
, 8, "local_names");
935 name
= DECL_NAME (decl
);
937 nelts
= VARRAY_ACTIVE_SIZE (local_names
);
938 for (i
= 0; i
< nelts
; i
++)
940 t
= VARRAY_TREE (local_names
, i
);
941 if (DECL_NAME (t
) == name
)
943 if (!DECL_LANG_SPECIFIC (decl
))
944 retrofit_lang_decl (decl
);
945 DECL_LANG_SPECIFIC (decl
)->decl_flags
.u2sel
= 1;
946 if (DECL_LANG_SPECIFIC (t
))
947 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
949 DECL_DISCRIMINATOR (decl
) = 1;
951 VARRAY_TREE (local_names
, i
) = decl
;
952 timevar_pop (TV_NAME_LOOKUP
);
957 VARRAY_PUSH_TREE (local_names
, decl
);
958 timevar_pop (TV_NAME_LOOKUP
);
961 /* Subroutine of duplicate_decls: return truthvalue of whether
962 or not types of these decls match.
964 For C++, we must compare the parameter list so that `int' can match
965 `int&' in a parameter position, but `int&' is not confused with
969 decls_match (tree newdecl
, tree olddecl
)
973 if (newdecl
== olddecl
)
976 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
977 /* If the two DECLs are not even the same kind of thing, we're not
978 interested in their types. */
981 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
983 tree f1
= TREE_TYPE (newdecl
);
984 tree f2
= TREE_TYPE (olddecl
);
985 tree p1
= TYPE_ARG_TYPES (f1
);
986 tree p2
= TYPE_ARG_TYPES (f2
);
988 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
989 && ! (DECL_EXTERN_C_P (newdecl
)
990 && DECL_EXTERN_C_P (olddecl
)))
993 if (TREE_CODE (f1
) != TREE_CODE (f2
))
996 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
998 if (p2
== NULL_TREE
&& DECL_EXTERN_C_P (olddecl
)
999 && (DECL_BUILT_IN (olddecl
)
1000 #ifndef NO_IMPLICIT_EXTERN_C
1001 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
1002 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1006 types_match
= self_promoting_args_p (p1
);
1007 if (p1
== void_list_node
)
1008 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1010 #ifndef NO_IMPLICIT_EXTERN_C
1011 else if (p1
== NULL_TREE
1012 && (DECL_EXTERN_C_P (olddecl
)
1013 && DECL_IN_SYSTEM_HEADER (olddecl
)
1014 && !DECL_CLASS_SCOPE_P (olddecl
))
1015 && (DECL_EXTERN_C_P (newdecl
)
1016 && DECL_IN_SYSTEM_HEADER (newdecl
)
1017 && !DECL_CLASS_SCOPE_P (newdecl
)))
1019 types_match
= self_promoting_args_p (p2
);
1020 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1024 types_match
= compparms (p1
, p2
);
1029 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1031 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1032 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1035 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1036 DECL_TEMPLATE_PARMS (olddecl
)))
1039 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1040 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1041 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1043 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1044 DECL_TEMPLATE_RESULT (newdecl
));
1048 if (TREE_TYPE (newdecl
) == error_mark_node
)
1049 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1050 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1051 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1052 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1055 types_match
= comptypes (TREE_TYPE (newdecl
),
1056 TREE_TYPE (olddecl
),
1057 COMPARE_REDECLARATION
);
1063 /* If NEWDECL is `static' and an `extern' was seen previously,
1064 warn about it. OLDDECL is the previous declaration.
1066 Note that this does not apply to the C++ case of declaring
1067 a variable `extern const' and then later `const'.
1069 Don't complain about built-in functions, since they are beyond
1070 the user's control. */
1073 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1077 if (TREE_CODE (newdecl
) == TYPE_DECL
1078 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1079 || TREE_CODE (newdecl
) == CONST_DECL
1080 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1083 /* Don't get confused by static member functions; that's a different
1085 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1086 && DECL_STATIC_FUNCTION_P (newdecl
))
1089 /* If the old declaration was `static', or the new one isn't, then
1090 then everything is OK. */
1091 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1094 /* It's OK to declare a builtin function as `static'. */
1095 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1096 && DECL_ARTIFICIAL (olddecl
))
1099 name
= DECL_ASSEMBLER_NAME (newdecl
);
1100 pedwarn ("`%D' was declared `extern' and later `static'", newdecl
);
1101 cp_pedwarn_at ("previous declaration of `%D'", olddecl
);
1104 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1105 If the redeclaration is invalid, a diagnostic is issued, and the
1106 error_mark_node is returned. Otherwise, OLDDECL is returned.
1108 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1112 duplicate_decls (tree newdecl
, tree olddecl
)
1114 unsigned olddecl_uid
= DECL_UID (olddecl
);
1115 int olddecl_friend
= 0, types_match
= 0;
1116 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
)
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 ("%Jfunction '%D' redeclared as inline", newdecl
, newdecl
);
1150 warning ("%Jprevious declaration of '%D' with attribute noinline",
1153 else if (DECL_DECLARED_INLINE_P (olddecl
)
1154 && DECL_UNINLINABLE (newdecl
)
1155 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1157 warning ("%Jfunction '%D' redeclared with attribute noinline",
1159 warning ("%Jprevious declaration of '%D' was inline",
1164 /* Check for redeclaration and other discrepancies. */
1165 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1166 && DECL_ARTIFICIAL (olddecl
))
1168 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1170 /* Avoid warnings redeclaring anticipated built-ins. */
1171 if (DECL_ANTICIPATED (olddecl
))
1174 /* If you declare a built-in or predefined function name as static,
1175 the old definition is overridden, but optionally warn this was a
1176 bad choice of name. */
1177 if (! TREE_PUBLIC (newdecl
))
1180 warning ("shadowing %s function `%#D'",
1181 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1183 /* Discard the old built-in function. */
1186 /* If the built-in is not ansi, then programs can override
1187 it even globally without an error. */
1188 else if (! DECL_BUILT_IN (olddecl
))
1189 warning ("library function `%#D' redeclared as non-function `%#D'",
1193 error ("declaration of `%#D'", newdecl
);
1194 error ("conflicts with built-in declaration `%#D'",
1199 else if (!types_match
)
1201 /* Avoid warnings redeclaring anticipated built-ins. */
1202 if (DECL_ANTICIPATED (olddecl
))
1204 /* Deal with fileptr_type_node. FILE type is not known
1205 at the time we create the builtins. */
1208 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1209 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1211 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1214 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1216 tree t
= TREE_VALUE (t1
);
1218 if (TREE_CODE (t
) == POINTER_TYPE
1219 && TYPE_NAME (TREE_TYPE (t
))
1220 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1221 == get_identifier ("FILE")
1222 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1224 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1226 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1227 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1228 types_match
= decls_match (newdecl
, olddecl
);
1230 return duplicate_decls (newdecl
, olddecl
);
1231 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1234 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1237 else if ((DECL_EXTERN_C_P (newdecl
)
1238 && DECL_EXTERN_C_P (olddecl
))
1239 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1240 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1242 /* A near match; override the builtin. */
1244 if (TREE_PUBLIC (newdecl
))
1246 warning ("new declaration `%#D'", newdecl
);
1247 warning ("ambiguates built-in declaration `%#D'",
1250 else if (warn_shadow
)
1251 warning ("shadowing %s function `%#D'",
1252 DECL_BUILT_IN (olddecl
) ? "built-in" : "library",
1256 /* Discard the old built-in function. */
1259 /* Replace the old RTL to avoid problems with inlining. */
1260 COPY_DECL_RTL (newdecl
, olddecl
);
1262 /* Even if the types match, prefer the new declarations type
1263 for anticipated built-ins, for exception lists, etc... */
1264 else if (DECL_ANTICIPATED (olddecl
))
1266 tree type
= TREE_TYPE (newdecl
);
1267 tree attribs
= (*targetm
.merge_type_attributes
)
1268 (TREE_TYPE (olddecl
), type
);
1270 type
= cp_build_type_attribute_variant (type
, attribs
);
1271 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1274 /* Whether or not the builtin can throw exceptions has no
1275 bearing on this declarator. */
1276 TREE_NOTHROW (olddecl
) = 0;
1278 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1280 /* If a builtin function is redeclared as `static', merge
1281 the declarations, but make the original one static. */
1282 DECL_THIS_STATIC (olddecl
) = 1;
1283 TREE_PUBLIC (olddecl
) = 0;
1285 /* Make the old declaration consistent with the new one so
1286 that all remnants of the builtin-ness of this function
1287 will be banished. */
1288 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1289 COPY_DECL_RTL (newdecl
, olddecl
);
1292 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1294 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1295 && TREE_CODE (newdecl
) != TYPE_DECL
1296 && ! (TREE_CODE (newdecl
) == TEMPLATE_DECL
1297 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
))
1298 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1299 && TREE_CODE (olddecl
) != TYPE_DECL
1300 && ! (TREE_CODE (olddecl
) == TEMPLATE_DECL
1301 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1304 /* We do nothing special here, because C++ does such nasty
1305 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1306 get shadowed, and know that if we need to find a TYPE_DECL
1307 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1308 slot of the identifier. */
1312 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1313 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1314 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1315 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1318 error ("`%#D' redeclared as different kind of symbol", newdecl
);
1319 if (TREE_CODE (olddecl
) == TREE_LIST
)
1320 olddecl
= TREE_VALUE (olddecl
);
1321 cp_error_at ("previous declaration of `%#D'", olddecl
);
1323 return error_mark_node
;
1325 else if (!types_match
)
1327 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1328 /* These are certainly not duplicate declarations; they're
1329 from different scopes. */
1332 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1334 /* The name of a class template may not be declared to refer to
1335 any other template, class, function, object, namespace, value,
1336 or type in the same scope. */
1337 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1338 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1340 error ("declaration of template `%#D'", newdecl
);
1341 cp_error_at ("conflicts with previous declaration `%#D'",
1344 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1345 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1346 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1347 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1348 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1349 DECL_TEMPLATE_PARMS (olddecl
))
1350 /* Template functions can be disambiguated by
1352 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1353 TREE_TYPE (TREE_TYPE (olddecl
))))
1355 error ("new declaration `%#D'", newdecl
);
1356 cp_error_at ("ambiguates old declaration `%#D'", olddecl
);
1360 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1362 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1364 error ("declaration of C function `%#D' conflicts with",
1366 cp_error_at ("previous declaration `%#D' here", olddecl
);
1368 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1369 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1371 error ("new declaration `%#D'", newdecl
);
1372 cp_error_at ("ambiguates old declaration `%#D'", olddecl
);
1379 error ("conflicting declaration '%#D'", newdecl
);
1380 cp_error_at ("'%D' has a previous declaration as `%#D'",
1385 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1386 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1387 && (!DECL_TEMPLATE_INFO (newdecl
)
1388 || (DECL_TI_TEMPLATE (newdecl
)
1389 != DECL_TI_TEMPLATE (olddecl
))))
1390 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1391 && (!DECL_TEMPLATE_INFO (olddecl
)
1392 || (DECL_TI_TEMPLATE (olddecl
)
1393 != DECL_TI_TEMPLATE (newdecl
))))))
1394 /* It's OK to have a template specialization and a non-template
1395 with the same type, or to have specializations of two
1396 different templates with the same type. Note that if one is a
1397 specialization, and the other is an instantiation of the same
1398 template, that we do not exit at this point. That situation
1399 can occur if we instantiate a template class, and then
1400 specialize one of its methods. This situation is valid, but
1401 the declarations must be merged in the usual way. */
1403 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1404 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1405 && !DECL_USE_TEMPLATE (newdecl
))
1406 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1407 && !DECL_USE_TEMPLATE (olddecl
))))
1408 /* One of the declarations is a template instantiation, and the
1409 other is not a template at all. That's OK. */
1411 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
1412 && DECL_NAMESPACE_ALIAS (newdecl
)
1413 && DECL_NAMESPACE_ALIAS (newdecl
) == DECL_NAMESPACE_ALIAS (olddecl
))
1414 /* In [namespace.alias] we have:
1416 In a declarative region, a namespace-alias-definition can be
1417 used to redefine a namespace-alias declared in that declarative
1418 region to refer only to the namespace to which it already
1421 Therefore, if we encounter a second alias directive for the same
1422 alias, we can just ignore the second directive. */
1426 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1429 error (errmsg
, newdecl
);
1430 if (DECL_NAME (olddecl
) != NULL_TREE
)
1431 cp_error_at ((DECL_INITIAL (olddecl
)
1432 && namespace_bindings_p ())
1433 ? "`%#D' previously defined here"
1434 : "`%#D' previously declared here", olddecl
);
1435 return error_mark_node
;
1437 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1438 && DECL_INITIAL (olddecl
) != NULL_TREE
1439 && TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) == NULL_TREE
1440 && TYPE_ARG_TYPES (TREE_TYPE (newdecl
)) != NULL_TREE
)
1442 /* Prototype decl follows defn w/o prototype. */
1443 cp_warning_at ("prototype for `%#D'", newdecl
);
1444 warning ("%Jfollows non-prototype definition here", olddecl
);
1446 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1447 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1449 /* extern "C" int foo ();
1450 int foo () { bar (); }
1452 if (current_lang_depth () == 0)
1453 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1456 cp_error_at ("previous declaration of `%#D' with %L linkage",
1457 olddecl
, DECL_LANGUAGE (olddecl
));
1458 error ("conflicts with new declaration with %L linkage",
1459 DECL_LANGUAGE (newdecl
));
1463 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1465 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1467 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1468 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1471 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1472 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1474 for (; t1
&& t1
!= void_list_node
;
1475 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1476 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1478 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1481 pedwarn ("default argument given for parameter %d of `%#D'",
1483 cp_pedwarn_at ("after previous specification in `%#D'",
1488 error ("default argument given for parameter %d of `%#D'",
1490 cp_error_at ("after previous specification in `%#D'",
1495 if (DECL_DECLARED_INLINE_P (newdecl
)
1496 && ! DECL_DECLARED_INLINE_P (olddecl
)
1497 && TREE_ADDRESSABLE (olddecl
) && warn_inline
)
1499 warning ("`%#D' was used before it was declared inline", newdecl
);
1500 warning ("%Jprevious non-inline declaration here", olddecl
);
1505 /* Do not merge an implicit typedef with an explicit one. In:
1509 typedef class A A __attribute__ ((foo));
1511 the attribute should apply only to the typedef. */
1512 if (TREE_CODE (olddecl
) == TYPE_DECL
1513 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1514 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1517 /* If new decl is `static' and an `extern' was seen previously,
1519 warn_extern_redeclared_static (newdecl
, olddecl
);
1521 /* We have committed to returning 1 at this point. */
1522 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1524 /* Now that functions must hold information normally held
1525 by field decls, there is extra work to do so that
1526 declaration information does not get destroyed during
1528 if (DECL_VINDEX (olddecl
))
1529 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1530 if (DECL_CONTEXT (olddecl
))
1531 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1532 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1533 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1534 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1535 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1536 DECL_NEEDS_FINAL_OVERRIDER_P (newdecl
) |= DECL_NEEDS_FINAL_OVERRIDER_P (olddecl
);
1537 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1538 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1539 SET_OVERLOADED_OPERATOR_CODE
1540 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1541 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1543 /* Optionally warn about more than one declaration for the same
1544 name, but don't warn about a function declaration followed by a
1546 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1547 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1548 /* Don't warn about extern decl followed by definition. */
1549 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1550 /* Don't warn about friends, let add_friend take care of it. */
1551 && ! (DECL_FRIEND_P (newdecl
) || DECL_FRIEND_P (olddecl
)))
1553 warning ("redundant redeclaration of `%D' in same scope", newdecl
);
1554 cp_warning_at ("previous declaration of `%D'", olddecl
);
1558 /* Deal with C++: must preserve virtual function table size. */
1559 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1561 tree newtype
= TREE_TYPE (newdecl
);
1562 tree oldtype
= TREE_TYPE (olddecl
);
1564 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1565 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1566 CLASSTYPE_FRIEND_CLASSES (newtype
)
1567 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1569 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1572 /* Copy all the DECL_... slots specified in the new decl
1573 except for any that we copy here from the old type. */
1574 DECL_ATTRIBUTES (newdecl
)
1575 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1577 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1579 TREE_TYPE (olddecl
) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
));
1580 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1581 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1582 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1584 /* If the new declaration is a definition, update the file and
1585 line information on the declaration. */
1586 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl
)) == NULL_TREE
1587 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl
)) != NULL_TREE
)
1589 DECL_SOURCE_LOCATION (olddecl
)
1590 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl
))
1591 = DECL_SOURCE_LOCATION (newdecl
);
1592 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1593 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl
))
1594 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl
));
1597 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1599 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl
))
1600 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl
));
1601 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl
))
1602 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl
));
1610 /* Automatically handles default parameters. */
1611 tree oldtype
= TREE_TYPE (olddecl
);
1614 /* Merge the data types specified in the two decls. */
1615 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1617 /* If merge_types produces a non-typedef type, just use the old type. */
1618 if (TREE_CODE (newdecl
) == TYPE_DECL
1619 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1622 if (TREE_CODE (newdecl
) == VAR_DECL
)
1624 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1625 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1626 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1627 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1630 /* Do this after calling `merge_types' so that default
1631 parameters don't confuse us. */
1632 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1633 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
))
1634 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl
))))
1636 TREE_TYPE (newdecl
) = build_exception_variant (newtype
,
1637 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
)));
1638 TREE_TYPE (olddecl
) = build_exception_variant (newtype
,
1639 TYPE_RAISES_EXCEPTIONS (oldtype
));
1641 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (olddecl
))
1642 && ! DECL_IS_BUILTIN (olddecl
)
1644 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl
)),
1645 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl
)), 1))
1647 error ("declaration of `%F' throws different exceptions",
1649 cp_error_at ("than previous declaration `%F'", olddecl
);
1652 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1654 /* Lay the type out, unless already done. */
1655 if (! same_type_p (newtype
, oldtype
)
1656 && TREE_TYPE (newdecl
) != error_mark_node
1657 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1658 layout_type (TREE_TYPE (newdecl
));
1660 if ((TREE_CODE (newdecl
) == VAR_DECL
1661 || TREE_CODE (newdecl
) == PARM_DECL
1662 || TREE_CODE (newdecl
) == RESULT_DECL
1663 || TREE_CODE (newdecl
) == FIELD_DECL
1664 || TREE_CODE (newdecl
) == TYPE_DECL
)
1665 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1666 layout_decl (newdecl
, 0);
1668 /* Merge the type qualifiers. */
1669 if (TREE_READONLY (newdecl
))
1670 TREE_READONLY (olddecl
) = 1;
1671 if (TREE_THIS_VOLATILE (newdecl
))
1672 TREE_THIS_VOLATILE (olddecl
) = 1;
1674 /* Merge the initialization information. */
1675 if (DECL_INITIAL (newdecl
) == NULL_TREE
1676 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1678 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1679 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1680 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl
)
1681 && DECL_LANG_SPECIFIC (newdecl
)
1682 && DECL_LANG_SPECIFIC (olddecl
))
1684 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1685 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1689 /* Merge the section attribute.
1690 We want to issue an error if the sections conflict but that must be
1691 done later in decl_attributes since we are called before attributes
1693 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1694 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1696 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1698 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1699 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1700 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1701 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1702 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1703 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1704 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1705 DECL_IS_PURE (newdecl
) |= DECL_IS_PURE (olddecl
);
1706 /* Keep the old RTL. */
1707 COPY_DECL_RTL (olddecl
, newdecl
);
1709 else if (TREE_CODE (newdecl
) == VAR_DECL
1710 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1712 /* Keep the old RTL. We cannot keep the old RTL if the old
1713 declaration was for an incomplete object and the new
1714 declaration is not since many attributes of the RTL will
1716 COPY_DECL_RTL (olddecl
, newdecl
);
1719 /* If cannot merge, then use the new type and qualifiers,
1720 and don't preserve the old rtl. */
1723 /* Clean out any memory we had of the old declaration. */
1724 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1726 TREE_VALUE (oldstatic
) = error_mark_node
;
1728 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1729 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1730 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1731 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1734 /* Merge the storage class information. */
1735 merge_weak (newdecl
, olddecl
);
1737 DECL_ONE_ONLY (newdecl
) |= DECL_ONE_ONLY (olddecl
);
1738 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1739 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1740 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1741 if (! DECL_EXTERNAL (olddecl
))
1742 DECL_EXTERNAL (newdecl
) = 0;
1744 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1746 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1747 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1748 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1749 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1750 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1751 /* Don't really know how much of the language-specific
1752 values we should copy from old to new. */
1753 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
1754 DECL_LANG_SPECIFIC (newdecl
)->decl_flags
.u2
=
1755 DECL_LANG_SPECIFIC (olddecl
)->decl_flags
.u2
;
1756 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
1757 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
1758 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
1759 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
1760 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1762 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1763 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1764 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
1766 DECL_BEFRIENDING_CLASSES (newdecl
)
1767 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
1768 DECL_BEFRIENDING_CLASSES (olddecl
));
1769 /* DECL_THUNKS is only valid for virtual functions,
1770 otherwise it is a DECL_FRIEND_CONTEXT. */
1771 if (DECL_VIRTUAL_P (newdecl
))
1772 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
1776 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1778 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
1779 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
1781 /* If newdecl is not a specialization, then it is not a
1782 template-related function at all. And that means that we
1783 should have exited above, returning 0. */
1784 my_friendly_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
),
1787 if (TREE_USED (olddecl
))
1788 /* From [temp.expl.spec]:
1790 If a template, a member template or the member of a class
1791 template is explicitly specialized then that
1792 specialization shall be declared before the first use of
1793 that specialization that would cause an implicit
1794 instantiation to take place, in every translation unit in
1795 which such a use occurs. */
1796 error ("explicit specialization of %D after first use",
1799 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
1801 /* [temp.expl.spec/14] We don't inline explicit specialization
1802 just because the primary template says so. */
1806 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
1807 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
1809 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
1811 /* If either decl says `inline', this fn is inline, unless
1812 its definition was passed already. */
1813 if (DECL_INLINE (newdecl
) && DECL_INITIAL (olddecl
) == NULL_TREE
)
1814 DECL_INLINE (olddecl
) = 1;
1815 DECL_INLINE (newdecl
) = DECL_INLINE (olddecl
);
1817 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
1818 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
1821 /* Preserve abstractness on cloned [cd]tors. */
1822 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
1826 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1827 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
1828 COPY_DECL_RTL (newdecl
, olddecl
);
1830 if (! types_match
|| new_defines_function
)
1832 /* These need to be copied so that the names are available.
1833 Note that if the types do match, we'll preserve inline
1834 info and other bits, but if not, we won't. */
1835 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
1836 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
1838 if (new_defines_function
)
1839 /* If defining a function declared with other language
1840 linkage, use the previously declared language linkage. */
1841 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1842 else if (types_match
)
1844 /* If redeclaring a builtin function, and not a definition,
1845 it stays built in. */
1846 if (DECL_BUILT_IN (olddecl
))
1848 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
1849 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
1850 /* If we're keeping the built-in definition, keep the rtl,
1851 regardless of declaration matches. */
1852 COPY_DECL_RTL (olddecl
, newdecl
);
1855 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
1856 /* Don't clear out the arguments if we're redefining a function. */
1857 if (DECL_ARGUMENTS (olddecl
))
1858 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
1861 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1862 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
1864 /* Now preserve various other info from the definition. */
1865 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
1866 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
1867 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
1868 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
1870 /* If either declaration has a nondefault visibility, use it. */
1871 if (DECL_VISIBILITY (olddecl
) != VISIBILITY_DEFAULT
)
1873 if (DECL_VISIBILITY (newdecl
) != VISIBILITY_DEFAULT
1874 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
1876 warning ("%J'%D': visibility attribute ignored because it",
1878 warning ("%Jconflicts with previous declaration here", olddecl
);
1880 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
1883 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1887 function_size
= sizeof (struct tree_decl
);
1889 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
1890 (char *) newdecl
+ sizeof (struct tree_common
),
1891 function_size
- sizeof (struct tree_common
));
1893 if (DECL_TEMPLATE_INSTANTIATION (newdecl
))
1894 /* If newdecl is a template instantiation, it is possible that
1895 the following sequence of events has occurred:
1897 o A friend function was declared in a class template. The
1898 class template was instantiated.
1900 o The instantiation of the friend declaration was
1901 recorded on the instantiation list, and is newdecl.
1903 o Later, however, instantiate_class_template called pushdecl
1904 on the newdecl to perform name injection. But, pushdecl in
1905 turn called duplicate_decls when it discovered that another
1906 declaration of a global function with the same name already
1909 o Here, in duplicate_decls, we decided to clobber newdecl.
1911 If we're going to do that, we'd better make sure that
1912 olddecl, and not newdecl, is on the list of
1913 instantiations so that if we try to do the instantiation
1914 again we won't get the clobbered declaration. */
1915 reregister_specialization (newdecl
,
1916 DECL_TI_TEMPLATE (newdecl
),
1921 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
1922 (char *) newdecl
+ sizeof (struct tree_common
),
1923 sizeof (struct tree_decl
) - sizeof (struct tree_common
)
1924 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
1927 DECL_UID (olddecl
) = olddecl_uid
;
1929 DECL_FRIEND_P (olddecl
) = 1;
1931 /* NEWDECL contains the merged attribute lists.
1932 Update OLDDECL to be the same. */
1933 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
1935 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
1936 so that encode_section_info has a chance to look at the new decl
1937 flags and attributes. */
1938 if (DECL_RTL_SET_P (olddecl
)
1939 && (TREE_CODE (olddecl
) == FUNCTION_DECL
1940 || (TREE_CODE (olddecl
) == VAR_DECL
1941 && TREE_STATIC (olddecl
))))
1942 make_decl_rtl (olddecl
, NULL
);
1947 /* Return zero if the declaration NEWDECL is valid
1948 when the declaration OLDDECL (assumed to be for the same name)
1949 has already been seen.
1950 Otherwise return an error message format string with a %s
1951 where the identifier should go. */
1954 redeclaration_error_message (tree newdecl
, tree olddecl
)
1956 if (TREE_CODE (newdecl
) == TYPE_DECL
)
1958 /* Because C++ can put things into name space for free,
1959 constructs like "typedef struct foo { ... } foo"
1960 would look like an erroneous redeclaration. */
1961 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
1964 return "redefinition of `%#D'";
1966 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1968 /* If this is a pure function, its olddecl will actually be
1969 the original initialization to `0' (which we force to call
1970 abort()). Don't complain about redefinition in this case. */
1971 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
))
1974 /* If both functions come from different namespaces, this is not
1975 a redeclaration - this is a conflict with a used function. */
1976 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
1977 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
))
1978 return "`%D' conflicts with used function";
1980 /* We'll complain about linkage mismatches in
1981 warn_extern_redeclared_static. */
1983 /* Defining the same name twice is no good. */
1984 if (DECL_INITIAL (olddecl
) != NULL_TREE
1985 && DECL_INITIAL (newdecl
) != NULL_TREE
)
1987 if (DECL_NAME (olddecl
) == NULL_TREE
)
1988 return "`%#D' not declared in class";
1990 return "redefinition of `%#D'";
1994 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1998 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2000 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2001 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2002 return "redefinition of `%#D'";
2006 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2007 || (DECL_TEMPLATE_RESULT (newdecl
)
2008 == DECL_TEMPLATE_RESULT (olddecl
)))
2011 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2012 if (DECL_TEMPLATE_INFO (nt
))
2013 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2014 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2015 if (DECL_TEMPLATE_INFO (ot
))
2016 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2017 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
))
2018 return "redefinition of `%#D'";
2022 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2024 /* Objects declared at top level: */
2025 /* If at least one is a reference, it's ok. */
2026 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2028 /* Reject two definitions. */
2029 return "redefinition of `%#D'";
2033 /* Objects declared with block scope: */
2034 /* Reject two definitions, and reject a definition
2035 together with an external reference. */
2036 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2037 return "redeclaration of `%#D'";
2042 /* Create a new label, named ID. */
2045 make_label_decl (tree id
, int local_p
)
2049 decl
= build_decl (LABEL_DECL
, id
, void_type_node
);
2051 DECL_CONTEXT (decl
) = current_function_decl
;
2052 DECL_MODE (decl
) = VOIDmode
;
2053 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2055 /* Say where one reference is to the label, for the sake of the
2056 error if it is not defined. */
2057 DECL_SOURCE_LOCATION (decl
) = input_location
;
2059 /* Record the fact that this identifier is bound to this label. */
2060 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2065 /* Record this label on the list of used labels so that we can check
2066 at the end of the function to see whether or not the label was
2067 actually defined, and so we can check when the label is defined whether
2068 this use is valid. */
2071 use_label (tree decl
)
2073 if (named_label_uses
== NULL
2074 || named_label_uses
->names_in_scope
!= current_binding_level
->names
2075 || named_label_uses
->label_decl
!= decl
)
2077 struct named_label_use_list
*new_ent
;
2078 new_ent
= ggc_alloc (sizeof (struct named_label_use_list
));
2079 new_ent
->label_decl
= decl
;
2080 new_ent
->names_in_scope
= current_binding_level
->names
;
2081 new_ent
->binding_level
= current_binding_level
;
2082 new_ent
->o_goto_locus
= input_location
;
2083 new_ent
->next
= named_label_uses
;
2084 named_label_uses
= new_ent
;
2088 /* Look for a label named ID in the current function. If one cannot
2089 be found, create one. (We keep track of used, but undefined,
2090 labels, and complain about them at the end of a function.) */
2093 lookup_label (tree id
)
2096 struct named_label_list
*ent
;
2098 timevar_push (TV_NAME_LOOKUP
);
2099 /* You can't use labels at global scope. */
2100 if (current_function_decl
== NULL_TREE
)
2102 error ("label `%E' referenced outside of any function", id
);
2103 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, NULL_TREE
);
2106 /* See if we've already got this label. */
2107 decl
= IDENTIFIER_LABEL_VALUE (id
);
2108 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2109 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2111 /* Record this label on the list of labels used in this function.
2112 We do this before calling make_label_decl so that we get the
2113 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2114 ent
= ggc_alloc_cleared (sizeof (struct named_label_list
));
2115 ent
->old_value
= IDENTIFIER_LABEL_VALUE (id
);
2116 ent
->next
= named_labels
;
2119 /* We need a new label. */
2120 decl
= make_label_decl (id
, /*local_p=*/0);
2122 /* Now fill in the information we didn't have before. */
2123 ent
->label_decl
= decl
;
2125 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2128 /* Declare a local label named ID. */
2131 declare_local_label (tree id
)
2135 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2136 this scope we can restore the old value of
2137 IDENTIFIER_TYPE_VALUE. */
2138 current_binding_level
->shadowed_labels
2139 = tree_cons (IDENTIFIER_LABEL_VALUE (id
), NULL_TREE
,
2140 current_binding_level
->shadowed_labels
);
2141 /* Look for the label. */
2142 decl
= make_label_decl (id
, /*local_p=*/1);
2143 /* Now fill in the information we didn't have before. */
2144 TREE_VALUE (current_binding_level
->shadowed_labels
) = decl
;
2149 /* Returns nonzero if it is ill-formed to jump past the declaration of
2150 DECL. Returns 2 if it's also a real problem. */
2153 decl_jump_unsafe (tree decl
)
2155 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
))
2158 if (DECL_INITIAL (decl
) == NULL_TREE
2159 && pod_type_p (TREE_TYPE (decl
)))
2162 /* This is really only important if we're crossing an initialization.
2163 The POD stuff is just pedantry; why should it matter if the class
2164 contains a field of pointer to member type? */
2165 if (DECL_INITIAL (decl
)
2166 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))))
2171 /* Check that a single previously seen jump to a newly defined label
2172 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2173 the jump context; NAMES are the names in scope in LEVEL at the jump
2174 context; FILE and LINE are the source position of the jump or 0. */
2177 check_previous_goto_1 (tree decl
,
2178 struct cp_binding_level
* level
,
2179 tree names
, const location_t
*locus
)
2183 struct cp_binding_level
*b
= current_binding_level
;
2184 for (; b
; b
= b
->level_chain
)
2186 tree new_decls
= b
->names
;
2187 tree old_decls
= (b
== level
? names
: NULL_TREE
);
2188 for (; new_decls
!= old_decls
;
2189 new_decls
= TREE_CHAIN (new_decls
))
2191 int problem
= decl_jump_unsafe (new_decls
);
2198 pedwarn ("jump to label `%D'", decl
);
2200 pedwarn ("jump to case label");
2203 pedwarn ("%H from here", locus
);
2208 cp_error_at (" crosses initialization of `%#D'",
2211 cp_pedwarn_at (" enters scope of non-POD `%#D'",
2217 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && ! saw_eh
)
2222 pedwarn ("jump to label `%D'", decl
);
2224 pedwarn ("jump to case label");
2227 pedwarn ("%H from here", locus
);
2230 if (b
->kind
== sk_try
)
2231 error (" enters try block");
2233 error (" enters catch block");
2240 check_previous_goto (struct named_label_use_list
* use
)
2242 check_previous_goto_1 (use
->label_decl
, use
->binding_level
,
2243 use
->names_in_scope
, &use
->o_goto_locus
);
2247 check_switch_goto (struct cp_binding_level
* level
)
2249 check_previous_goto_1 (NULL_TREE
, level
, level
->names
, NULL
);
2252 /* Check that any previously seen jumps to a newly defined label DECL
2253 are OK. Called by define_label. */
2256 check_previous_gotos (tree decl
)
2258 struct named_label_use_list
**usep
;
2260 if (! TREE_USED (decl
))
2263 for (usep
= &named_label_uses
; *usep
; )
2265 struct named_label_use_list
*use
= *usep
;
2266 if (use
->label_decl
== decl
)
2268 check_previous_goto (use
);
2272 usep
= &(use
->next
);
2276 /* Check that a new jump to a label DECL is OK. Called by
2277 finish_goto_stmt. */
2280 check_goto (tree decl
)
2284 struct named_label_list
*lab
;
2286 /* We can't know where a computed goto is jumping. So we assume
2288 if (! DECL_P (decl
))
2291 /* If the label hasn't been defined yet, defer checking. */
2292 if (! DECL_INITIAL (decl
))
2298 for (lab
= named_labels
; lab
; lab
= lab
->next
)
2299 if (decl
== lab
->label_decl
)
2302 /* If the label is not on named_labels it's a gcc local label, so
2303 it must be in an outer scope, so jumping to it is always OK. */
2307 if ((lab
->in_try_scope
|| lab
->in_catch_scope
|| lab
->bad_decls
)
2310 cp_pedwarn_at ("jump to label `%D'", decl
);
2311 pedwarn (" from here");
2315 for (bad
= lab
->bad_decls
; bad
; bad
= TREE_CHAIN (bad
))
2317 tree b
= TREE_VALUE (bad
);
2318 int u
= decl_jump_unsafe (b
);
2320 if (u
> 1 && DECL_ARTIFICIAL (b
))
2321 /* Can't skip init of __exception_info. */
2322 error ("%J enters catch block", b
);
2324 cp_error_at (" skips initialization of `%#D'", b
);
2326 cp_pedwarn_at (" enters scope of non-POD `%#D'", b
);
2329 if (lab
->in_try_scope
)
2330 error (" enters try block");
2331 else if (lab
->in_catch_scope
)
2332 error (" enters catch block");
2335 /* Define a label, specifying the location in the source file.
2336 Return the LABEL_DECL node for the label. */
2339 define_label (location_t location
, tree name
)
2341 tree decl
= lookup_label (name
);
2342 struct named_label_list
*ent
;
2343 struct cp_binding_level
*p
;
2345 timevar_push (TV_NAME_LOOKUP
);
2346 for (ent
= named_labels
; ent
; ent
= ent
->next
)
2347 if (ent
->label_decl
== decl
)
2350 /* After labels, make any new cleanups in the function go into their
2351 own new (temporary) binding contour. */
2352 for (p
= current_binding_level
;
2353 p
->kind
!= sk_function_parms
;
2355 p
->more_cleanups_ok
= 0;
2357 if (name
== get_identifier ("wchar_t"))
2358 pedwarn ("label named wchar_t");
2360 if (DECL_INITIAL (decl
) != NULL_TREE
)
2361 error ("duplicate label `%D'", decl
);
2364 /* Mark label as having been defined. */
2365 DECL_INITIAL (decl
) = error_mark_node
;
2366 /* Say where in the source. */
2367 DECL_SOURCE_LOCATION (decl
) = location
;
2370 ent
->names_in_scope
= current_binding_level
->names
;
2371 ent
->binding_level
= current_binding_level
;
2373 check_previous_gotos (decl
);
2376 timevar_pop (TV_NAME_LOOKUP
);
2382 struct cp_binding_level
*level
;
2383 struct cp_switch
*next
;
2384 /* The SWITCH_STMT being built. */
2386 /* A splay-tree mapping the low element of a case range to the high
2387 element, or NULL_TREE if there is no high element. Used to
2388 determine whether or not a new case label duplicates an old case
2389 label. We need a tree, rather than simply a hash table, because
2390 of the GNU case range extension. */
2394 /* A stack of the currently active switch statements. The innermost
2395 switch statement is on the top of the stack. There is no need to
2396 mark the stack for garbage collection because it is only active
2397 during the processing of the body of a function, and we never
2398 collect at that point. */
2400 static struct cp_switch
*switch_stack
;
2402 /* Called right after a switch-statement condition is parsed.
2403 SWITCH_STMT is the switch statement being parsed. */
2406 push_switch (tree switch_stmt
)
2408 struct cp_switch
*p
= xmalloc (sizeof (struct cp_switch
));
2409 p
->level
= current_binding_level
;
2410 p
->next
= switch_stack
;
2411 p
->switch_stmt
= switch_stmt
;
2412 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2419 struct cp_switch
*cs
= switch_stack
;
2421 /* Emit warnings as needed. */
2422 c_do_switch_warnings (cs
->cases
, cs
->switch_stmt
);
2424 splay_tree_delete (cs
->cases
);
2425 switch_stack
= switch_stack
->next
;
2429 /* Note that we've seen a definition of a case label, and complain if this
2430 is a bad place for one. */
2433 finish_case_label (tree low_value
, tree high_value
)
2436 struct cp_binding_level
*p
;
2438 if (processing_template_decl
)
2442 /* For templates, just add the case label; we'll do semantic
2443 analysis at instantiation-time. */
2444 label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2445 return add_stmt (build_case_label (low_value
, high_value
, label
));
2448 /* Find the condition on which this switch statement depends. */
2449 cond
= SWITCH_COND (switch_stack
->switch_stmt
);
2450 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
2451 cond
= TREE_VALUE (cond
);
2453 r
= c_add_case_label (switch_stack
->cases
, cond
, low_value
, high_value
);
2455 check_switch_goto (switch_stack
->level
);
2457 /* After labels, make any new cleanups in the function go into their
2458 own new (temporary) binding contour. */
2459 for (p
= current_binding_level
;
2460 p
->kind
!= sk_function_parms
;
2462 p
->more_cleanups_ok
= 0;
2467 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2470 typename_hash (const void* k
)
2475 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
2476 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
2481 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2484 typename_compare (const void * k1
, const void * k2
)
2493 d1
= TYPE_NAME (t1
);
2494 d2
= TYPE_NAME (t2
);
2496 return (DECL_NAME (d1
) == DECL_NAME (d2
)
2497 && TYPE_CONTEXT (t1
) == TYPE_CONTEXT (t2
)
2498 && ((TREE_TYPE (t1
) != NULL_TREE
)
2499 == (TREE_TYPE (t2
) != NULL_TREE
))
2500 && same_type_p (TREE_TYPE (t1
), TREE_TYPE (t2
))
2501 && TYPENAME_TYPE_FULLNAME (t1
) == TYPENAME_TYPE_FULLNAME (t2
));
2504 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2505 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
2506 is non-NULL, this type is being created by the implicit typename
2507 extension, and BASE_TYPE is a type named `t' in some base class of
2508 `T' which depends on template parameters.
2510 Returns the new TYPENAME_TYPE. */
2512 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
2515 build_typename_type (tree context
, tree name
, tree fullname
)
2521 if (typename_htab
== NULL
)
2523 typename_htab
= htab_create_ggc (61, &typename_hash
,
2524 &typename_compare
, NULL
);
2527 /* Build the TYPENAME_TYPE. */
2528 t
= make_aggr_type (TYPENAME_TYPE
);
2529 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
2530 TYPENAME_TYPE_FULLNAME (t
) = fullname
;
2532 /* Build the corresponding TYPE_DECL. */
2533 d
= build_decl (TYPE_DECL
, name
, t
);
2534 TYPE_NAME (TREE_TYPE (d
)) = d
;
2535 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2536 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2537 DECL_ARTIFICIAL (d
) = 1;
2539 /* See if we already have this type. */
2540 e
= htab_find_slot (typename_htab
, t
, INSERT
);
2549 /* Resolve `typename CONTEXT::NAME'. Returns an appropriate type,
2550 unless an error occurs, in which case error_mark_node is returned.
2551 If we locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is
2552 set, we return that, rather than the _TYPE it corresponds to, in
2553 other cases we look through the type decl. If TF_ERROR is set,
2554 complain about errors, otherwise be quiet. */
2557 make_typename_type (tree context
, tree name
, tsubst_flags_t complain
)
2561 if (name
== error_mark_node
2562 || context
== NULL_TREE
2563 || context
== error_mark_node
)
2564 return error_mark_node
;
2568 if (!(TYPE_LANG_SPECIFIC (name
)
2569 && (CLASSTYPE_IS_TEMPLATE (name
)
2570 || CLASSTYPE_USE_TEMPLATE (name
))))
2571 name
= TYPE_IDENTIFIER (name
);
2573 /* Create a TEMPLATE_ID_EXPR for the type. */
2574 name
= build_nt (TEMPLATE_ID_EXPR
,
2575 CLASSTYPE_TI_TEMPLATE (name
),
2576 CLASSTYPE_TI_ARGS (name
));
2578 else if (TREE_CODE (name
) == TYPE_DECL
)
2579 name
= DECL_NAME (name
);
2583 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
2585 name
= TREE_OPERAND (name
, 0);
2586 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2587 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
2589 if (TREE_CODE (name
) == TEMPLATE_DECL
)
2591 error ("`%D' used without template parameters", name
);
2592 return error_mark_node
;
2594 my_friendly_assert (TREE_CODE (name
) == IDENTIFIER_NODE
, 20030802);
2596 if (TREE_CODE (context
) == NAMESPACE_DECL
)
2598 /* We can get here from typename_sub0 in the explicit_template_type
2599 expansion. Just fail. */
2600 if (complain
& tf_error
)
2601 error ("no class template named `%#T' in `%#T'",
2603 return error_mark_node
;
2606 if (!dependent_type_p (context
)
2607 || currently_open_class (context
))
2609 if (TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
)
2611 tree tmpl
= NULL_TREE
;
2612 if (IS_AGGR_TYPE (context
))
2613 tmpl
= lookup_field (context
, name
, 0, false);
2614 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
2616 if (complain
& tf_error
)
2617 error ("no class template named `%#T' in `%#T'",
2619 return error_mark_node
;
2622 if (complain
& tf_error
)
2623 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
);
2625 return lookup_template_class (tmpl
,
2626 TREE_OPERAND (fullname
, 1),
2628 /*entering_scope=*/0,
2629 tf_error
| tf_warning
| tf_user
);
2635 if (!IS_AGGR_TYPE (context
))
2637 if (complain
& tf_error
)
2638 error ("no type named `%#T' in `%#T'", name
, context
);
2639 return error_mark_node
;
2642 t
= lookup_field (context
, name
, 0, true);
2645 if (TREE_CODE (t
) != TYPE_DECL
)
2647 if (complain
& tf_error
)
2648 error ("no type named `%#T' in `%#T'", name
, context
);
2649 return error_mark_node
;
2652 if (complain
& tf_error
)
2653 perform_or_defer_access_check (TYPE_BINFO (context
), t
);
2655 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
2663 /* If the CONTEXT is not a template type, then either the field is
2664 there now or its never going to be. */
2665 if (!dependent_type_p (context
))
2667 if (complain
& tf_error
)
2668 error ("no type named `%#T' in `%#T'", name
, context
);
2669 return error_mark_node
;
2672 return build_typename_type (context
, name
, fullname
);
2675 /* Resolve `CONTEXT::template NAME'. Returns an appropriate type,
2676 unless an error occurs, in which case error_mark_node is returned.
2677 If we locate a TYPE_DECL, we return that, rather than the _TYPE it
2678 corresponds to. If COMPLAIN zero, don't complain about any errors
2682 make_unbound_class_template (tree context
, tree name
, tsubst_flags_t complain
)
2688 name
= TYPE_IDENTIFIER (name
);
2689 else if (DECL_P (name
))
2690 name
= DECL_NAME (name
);
2691 if (TREE_CODE (name
) != IDENTIFIER_NODE
)
2694 if (!dependent_type_p (context
)
2695 || currently_open_class (context
))
2697 tree tmpl
= NULL_TREE
;
2699 if (IS_AGGR_TYPE (context
))
2700 tmpl
= lookup_field (context
, name
, 0, false);
2702 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
2704 if (complain
& tf_error
)
2705 error ("no class template named `%#T' in `%#T'", name
, context
);
2706 return error_mark_node
;
2709 if (complain
& tf_error
)
2710 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
);
2715 /* Build the UNBOUND_CLASS_TEMPLATE. */
2716 t
= make_aggr_type (UNBOUND_CLASS_TEMPLATE
);
2717 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
2718 TREE_TYPE (t
) = NULL_TREE
;
2720 /* Build the corresponding TEMPLATE_DECL. */
2721 d
= build_decl (TEMPLATE_DECL
, name
, t
);
2722 TYPE_NAME (TREE_TYPE (d
)) = d
;
2723 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2724 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2725 DECL_ARTIFICIAL (d
) = 1;
2732 /* Push the declarations of builtin types into the namespace.
2733 RID_INDEX is the index of the builtin type in the array
2734 RID_POINTERS. NAME is the name used when looking up the builtin
2735 type. TYPE is the _TYPE node for the builtin type. */
2738 record_builtin_type (enum rid rid_index
,
2742 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
2743 tree tdecl
= NULL_TREE
;
2745 if ((int) rid_index
< (int) RID_MAX
)
2746 rname
= ridpointers
[(int) rid_index
];
2748 tname
= get_identifier (name
);
2750 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2751 eliminated. Built-in types should not be looked up name; their
2752 names are keywords that the parser can recognize. However, there
2753 is code in c-common.c that uses identifier_global_value to look
2754 up built-in types by name. */
2757 tdecl
= build_decl (TYPE_DECL
, tname
, type
);
2758 DECL_ARTIFICIAL (tdecl
) = 1;
2759 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
2765 tdecl
= build_decl (TYPE_DECL
, rname
, type
);
2766 DECL_ARTIFICIAL (tdecl
) = 1;
2768 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
2771 if (!TYPE_NAME (type
))
2772 TYPE_NAME (type
) = tdecl
;
2775 debug_hooks
->type_decl (tdecl
, 0);
2778 /* Record one of the standard Java types.
2779 * Declare it as having the given NAME.
2780 * If SIZE > 0, it is the size of one of the integral types;
2781 * otherwise it is the negative of the size of one of the other types. */
2784 record_builtin_java_type (const char* name
, int size
)
2788 type
= make_signed_type (size
);
2789 else if (size
> -32)
2790 { /* "__java_char" or ""__java_boolean". */
2791 type
= make_unsigned_type (-size
);
2792 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2795 { /* "__java_float" or ""__java_double". */
2796 type
= make_node (REAL_TYPE
);
2797 TYPE_PRECISION (type
) = - size
;
2800 record_builtin_type (RID_MAX
, name
, type
);
2801 decl
= TYPE_NAME (type
);
2803 /* Suppress generate debug symbol entries for these types,
2804 since for normal C++ they are just clutter.
2805 However, push_lang_context undoes this if extern "Java" is seen. */
2806 DECL_IGNORED_P (decl
) = 1;
2808 TYPE_FOR_JAVA (type
) = 1;
2812 /* Push a type into the namespace so that the back-ends ignore it. */
2815 record_unknown_type (tree type
, const char* name
)
2817 tree decl
= pushdecl (build_decl (TYPE_DECL
, get_identifier (name
), type
));
2818 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2819 DECL_IGNORED_P (decl
) = 1;
2820 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
2821 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
2822 TYPE_ALIGN (type
) = 1;
2823 TYPE_USER_ALIGN (type
) = 0;
2824 TYPE_MODE (type
) = TYPE_MODE (void_type_node
);
2827 /* An string for which we should create an IDENTIFIER_NODE at
2830 typedef struct predefined_identifier
2832 /* The name of the identifier. */
2833 const char *const name
;
2834 /* The place where the IDENTIFIER_NODE should be stored. */
2836 /* Nonzero if this is the name of a constructor or destructor. */
2837 const int ctor_or_dtor_p
;
2838 } predefined_identifier
;
2840 /* Create all the predefined identifiers. */
2843 initialize_predefined_identifiers (void)
2845 const predefined_identifier
*pid
;
2847 /* A table of identifiers to create at startup. */
2848 static const predefined_identifier predefined_identifiers
[] = {
2849 { "C++", &lang_name_cplusplus
, 0 },
2850 { "C", &lang_name_c
, 0 },
2851 { "Java", &lang_name_java
, 0 },
2852 { CTOR_NAME
, &ctor_identifier
, 1 },
2853 { "__base_ctor", &base_ctor_identifier
, 1 },
2854 { "__comp_ctor", &complete_ctor_identifier
, 1 },
2855 { DTOR_NAME
, &dtor_identifier
, 1 },
2856 { "__comp_dtor", &complete_dtor_identifier
, 1 },
2857 { "__base_dtor", &base_dtor_identifier
, 1 },
2858 { "__deleting_dtor", &deleting_dtor_identifier
, 1 },
2859 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
2860 { "nelts", &nelts_identifier
, 0 },
2861 { THIS_NAME
, &this_identifier
, 0 },
2862 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
2863 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
2864 { "_vptr", &vptr_identifier
, 0 },
2865 { "__vtt_parm", &vtt_parm_identifier
, 0 },
2866 { "::", &global_scope_name
, 0 },
2867 { "std", &std_identifier
, 0 },
2871 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
2873 *pid
->node
= get_identifier (pid
->name
);
2874 if (pid
->ctor_or_dtor_p
)
2875 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
2879 /* Create the predefined scalar types of C,
2880 and some nodes representing standard constants (0, 1, (void *)0).
2881 Initialize the global binding level.
2882 Make definitions for built-in primitive functions. */
2885 cxx_init_decl_processing (void)
2888 tree void_ftype_ptr
;
2890 build_common_tree_nodes (flag_signed_char
);
2892 /* Create all the identifiers we need. */
2893 initialize_predefined_identifiers ();
2895 /* Create the global variables. */
2896 push_to_top_level ();
2898 current_function_decl
= NULL_TREE
;
2899 current_binding_level
= NULL
;
2900 /* Enter the global namespace. */
2901 my_friendly_assert (global_namespace
== NULL_TREE
, 375);
2902 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
2904 begin_scope (sk_namespace
, global_namespace
);
2906 current_lang_name
= NULL_TREE
;
2908 /* Adjust various flags based on command-line settings. */
2909 if (!flag_permissive
)
2910 flag_pedantic_errors
= 1;
2911 if (!flag_no_inline
)
2913 flag_inline_trees
= 1;
2916 if (flag_inline_functions
)
2918 flag_inline_trees
= 2;
2919 flag_inline_functions
= 0;
2922 /* Force minimum function alignment if using the least significant
2923 bit of function pointers to store the virtual bit. */
2924 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
2925 && force_align_functions_log
< 1)
2926 force_align_functions_log
= 1;
2929 current_lang_name
= lang_name_c
;
2931 error_mark_list
= build_tree_list (error_mark_node
, error_mark_node
);
2932 TREE_TYPE (error_mark_list
) = error_mark_node
;
2934 /* Create the `std' namespace. */
2935 push_namespace (std_identifier
);
2936 std_node
= current_namespace
;
2939 c_common_nodes_and_builtins ();
2941 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
2942 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
2943 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
2944 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
2945 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
2946 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
2947 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
2948 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
2950 integer_two_node
= build_int_2 (2, 0);
2951 TREE_TYPE (integer_two_node
) = integer_type_node
;
2952 integer_three_node
= build_int_2 (3, 0);
2953 TREE_TYPE (integer_three_node
) = integer_type_node
;
2955 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
2956 truthvalue_type_node
= boolean_type_node
;
2957 truthvalue_false_node
= boolean_false_node
;
2958 truthvalue_true_node
= boolean_true_node
;
2960 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
2963 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
2966 delta_type_node
= ptrdiff_type_node
;
2967 vtable_index_type
= ptrdiff_type_node
;
2969 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
2970 void_ftype
= build_function_type (void_type_node
, void_list_node
);
2971 void_ftype_ptr
= build_function_type (void_type_node
,
2972 tree_cons (NULL_TREE
,
2976 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
2978 /* C++ extensions */
2980 unknown_type_node
= make_node (UNKNOWN_TYPE
);
2981 record_unknown_type (unknown_type_node
, "unknown type");
2983 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
2984 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
2986 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
2988 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
2989 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
2992 /* Make sure we get a unique function type, so we can give
2993 its pointer type a name. (This wins for gdb.) */
2994 tree vfunc_type
= make_node (FUNCTION_TYPE
);
2995 TREE_TYPE (vfunc_type
) = integer_type_node
;
2996 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
2997 layout_type (vfunc_type
);
2999 vtable_entry_type
= build_pointer_type (vfunc_type
);
3001 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3004 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3005 layout_type (vtbl_type_node
);
3006 vtbl_type_node
= build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3007 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3008 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3009 layout_type (vtbl_ptr_type_node
);
3010 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3012 push_namespace (get_identifier ("__cxxabiv1"));
3013 abi_node
= current_namespace
;
3016 global_type_node
= make_node (LANG_TYPE
);
3017 record_unknown_type (global_type_node
, "global type");
3020 current_lang_name
= lang_name_cplusplus
;
3024 tree bad_alloc_type_node
;
3025 tree bad_alloc_decl
;
3026 tree newtype
, deltype
;
3027 tree ptr_ftype_sizetype
;
3029 push_namespace (std_identifier
);
3030 bad_alloc_id
= get_identifier ("bad_alloc");
3031 bad_alloc_type_node
= make_aggr_type (RECORD_TYPE
);
3032 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3034 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3035 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3036 TYPE_STUB_DECL (bad_alloc_type_node
) = bad_alloc_decl
;
3040 = build_function_type (ptr_type_node
,
3041 tree_cons (NULL_TREE
,
3044 newtype
= build_exception_variant
3045 (ptr_ftype_sizetype
, add_exception_specifier
3046 (NULL_TREE
, bad_alloc_type_node
, -1));
3047 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3048 push_cp_library_fn (NEW_EXPR
, newtype
);
3049 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3050 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3051 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3055 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3057 /* Perform other language dependent initializations. */
3058 init_class_processing ();
3059 init_search_processing ();
3060 init_rtti_processing ();
3062 if (flag_exceptions
)
3063 init_exception_processing ();
3065 if (! supports_one_only ())
3068 make_fname_decl
= cp_make_fname_decl
;
3069 start_fname_decls ();
3071 /* Show we use EH for cleanups. */
3072 if (flag_exceptions
)
3073 using_eh_for_cleanups ();
3076 /* Generate an initializer for a function naming variable from
3077 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3078 filled in with the type of the init. */
3081 cp_fname_init (const char* name
, tree
*type_p
)
3083 tree domain
= NULL_TREE
;
3085 tree init
= NULL_TREE
;
3090 length
= strlen (name
);
3091 domain
= build_index_type (size_int (length
));
3092 init
= build_string (length
+ 1, name
);
3095 type
= build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3096 type
= build_cplus_array_type (type
, domain
);
3101 TREE_TYPE (init
) = type
;
3103 init
= error_mark_node
;
3108 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3109 decl, NAME is the initialization string and TYPE_DEP indicates whether
3110 NAME depended on the type of the function. We make use of that to detect
3111 __PRETTY_FUNCTION__ inside a template fn. This is being done
3112 lazily at the point of first use, so we mustn't push the decl now. */
3115 cp_make_fname_decl (tree id
, int type_dep
)
3117 const char *const name
= (type_dep
&& processing_template_decl
3118 ? NULL
: fname_as_string (type_dep
));
3120 tree init
= cp_fname_init (name
, &type
);
3121 tree decl
= build_decl (VAR_DECL
, id
, type
);
3124 free ((char *) name
);
3126 /* As we're using pushdecl_with_scope, we must set the context. */
3127 DECL_CONTEXT (decl
) = current_function_decl
;
3128 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3130 TREE_STATIC (decl
) = 1;
3131 TREE_READONLY (decl
) = 1;
3132 DECL_ARTIFICIAL (decl
) = 1;
3133 DECL_INITIAL (decl
) = init
;
3135 TREE_USED (decl
) = 1;
3137 if (current_function_decl
)
3139 struct cp_binding_level
*b
= current_binding_level
;
3140 while (b
->level_chain
->kind
!= sk_function_parms
)
3142 pushdecl_with_scope (decl
, b
);
3143 cp_finish_decl (decl
, init
, NULL_TREE
, LOOKUP_ONLYCONVERTING
);
3146 pushdecl_top_level_and_finish (decl
, init
);
3151 /* Make a definition for a builtin function named NAME in the current
3152 namespace, whose data type is TYPE and whose context is CONTEXT.
3153 TYPE should be a function type with argument types.
3155 CLASS and CODE tell later passes how to compile calls to this function.
3156 See tree.h for possible values.
3158 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3159 the name to be called if we can't opencode the function.
3160 If ATTRS is nonzero, use that for the function's attribute
3164 builtin_function_1 (const char* name
,
3168 enum built_in_class
class,
3169 const char* libname
,
3172 tree decl
= build_library_fn_1 (get_identifier (name
), ERROR_MARK
, type
);
3173 DECL_BUILT_IN_CLASS (decl
) = class;
3174 DECL_FUNCTION_CODE (decl
) = code
;
3175 DECL_CONTEXT (decl
) = context
;
3179 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3180 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3181 function in the namespace. */
3183 SET_DECL_ASSEMBLER_NAME (decl
, get_identifier (libname
));
3185 /* Warn if a function in the namespace for users
3186 is used without an occasion to consider it declared. */
3187 if (name
[0] != '_' || name
[1] != '_')
3188 DECL_ANTICIPATED (decl
) = 1;
3190 /* Possibly apply some default attributes to this built-in function. */
3192 decl_attributes (&decl
, attrs
, ATTR_FLAG_BUILT_IN
);
3194 decl_attributes (&decl
, NULL_TREE
, 0);
3199 /* Entry point for the benefit of c_common_nodes_and_builtins.
3201 Make a definition for a builtin function named NAME and whose data type
3202 is TYPE. TYPE should be a function type with argument types. This
3203 function places the anticipated declaration in the global namespace
3204 and additionally in the std namespace if appropriate.
3206 CLASS and CODE tell later passes how to compile calls to this function.
3207 See tree.h for possible values.
3209 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3210 the name to be called if we can't opencode the function.
3212 If ATTRS is nonzero, use that for the function's attribute
3216 builtin_function (const char* name
,
3219 enum built_in_class
class,
3220 const char* libname
,
3223 /* All builtins that don't begin with an '_' should additionally
3224 go in the 'std' namespace. */
3227 push_namespace (std_identifier
);
3228 builtin_function_1 (name
, type
, std_node
, code
, class, libname
, attrs
);
3232 return builtin_function_1 (name
, type
, NULL_TREE
, code
,
3233 class, libname
, attrs
);
3236 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3237 function. Not called directly. */
3240 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3242 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3243 DECL_EXTERNAL (fn
) = 1;
3244 TREE_PUBLIC (fn
) = 1;
3245 DECL_ARTIFICIAL (fn
) = 1;
3246 TREE_NOTHROW (fn
) = 1;
3247 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3248 SET_DECL_LANGUAGE (fn
, lang_c
);
3252 /* Returns the _DECL for a library function with C linkage.
3253 We assume that such functions never throw; if this is incorrect,
3254 callers should unset TREE_NOTHROW. */
3257 build_library_fn (tree name
, tree type
)
3259 return build_library_fn_1 (name
, ERROR_MARK
, type
);
3262 /* Returns the _DECL for a library function with C++ linkage. */
3265 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3267 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3268 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3269 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3270 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3274 /* Like build_library_fn, but takes a C string instead of an
3278 build_library_fn_ptr (const char* name
, tree type
)
3280 return build_library_fn (get_identifier (name
), type
);
3283 /* Like build_cp_library_fn, but takes a C string instead of an
3287 build_cp_library_fn_ptr (const char* name
, tree type
)
3289 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3292 /* Like build_library_fn, but also pushes the function so that we will
3293 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3296 push_library_fn (tree name
, tree type
)
3298 tree fn
= build_library_fn (name
, type
);
3299 pushdecl_top_level (fn
);
3303 /* Like build_cp_library_fn, but also pushes the function so that it
3304 will be found by normal lookup. */
3307 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3309 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3316 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3320 push_void_library_fn (tree name
, tree parmtypes
)
3322 tree type
= build_function_type (void_type_node
, parmtypes
);
3323 return push_library_fn (name
, type
);
3326 /* Like push_library_fn, but also note that this function throws
3327 and does not return. Used for __throw_foo and the like. */
3330 push_throw_library_fn (tree name
, tree type
)
3332 tree fn
= push_library_fn (name
, type
);
3333 TREE_THIS_VOLATILE (fn
) = 1;
3334 TREE_NOTHROW (fn
) = 0;
3338 /* When we call finish_struct for an anonymous union, we create
3339 default copy constructors and such. But, an anonymous union
3340 shouldn't have such things; this function undoes the damage to the
3341 anonymous union type T.
3343 (The reason that we create the synthesized methods is that we don't
3344 distinguish `union { int i; }' from `typedef union { int i; } U'.
3345 The first is an anonymous union; the second is just an ordinary
3349 fixup_anonymous_aggr (tree t
)
3353 /* Wipe out memory of synthesized methods. */
3354 TYPE_HAS_CONSTRUCTOR (t
) = 0;
3355 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3356 TYPE_HAS_INIT_REF (t
) = 0;
3357 TYPE_HAS_CONST_INIT_REF (t
) = 0;
3358 TYPE_HAS_ASSIGN_REF (t
) = 0;
3359 TYPE_HAS_CONST_ASSIGN_REF (t
) = 0;
3361 /* Splice the implicitly generated functions out of the TYPE_METHODS
3363 q
= &TYPE_METHODS (t
);
3366 if (DECL_ARTIFICIAL (*q
))
3367 *q
= TREE_CHAIN (*q
);
3369 q
= &TREE_CHAIN (*q
);
3372 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3373 if (TYPE_METHODS (t
))
3374 error ("%Jan anonymous union cannot have function members",
3375 TYPE_MAIN_DECL (t
));
3377 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3378 assignment operators (because they cannot have these methods themselves).
3379 For anonymous unions this is already checked because they are not allowed
3380 in any union, otherwise we have to check it. */
3381 if (TREE_CODE (t
) != UNION_TYPE
)
3385 for (field
= TYPE_FIELDS (t
); field
; field
= TREE_CHAIN (field
))
3386 if (TREE_CODE (field
) == FIELD_DECL
)
3388 type
= TREE_TYPE (field
);
3389 if (CLASS_TYPE_P (type
))
3391 if (TYPE_NEEDS_CONSTRUCTING (type
))
3392 cp_error_at ("member %#D' with constructor not allowed in anonymous aggregate",
3394 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
3395 cp_error_at ("member %#D' with destructor not allowed in anonymous aggregate",
3397 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type
))
3398 cp_error_at ("member %#D' with copy assignment operator not allowed in anonymous aggregate",
3405 /* Make sure that a declaration with no declarator is well-formed, i.e.
3406 just declares a tagged type or anonymous union.
3408 Returns the type declared; or NULL_TREE if none. */
3411 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
3413 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
3414 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
3415 /* If a class, struct, or enum type is declared by the DECLSPECS
3416 (i.e, if a class-specifier, enum-specifier, or non-typename
3417 elaborated-type-specifier appears in the DECLSPECS),
3418 DECLARED_TYPE is set to the corresponding type. */
3419 tree declared_type
= NULL_TREE
;
3420 bool error_p
= false;
3422 if (declspecs
->multiple_types_p
)
3423 error ("multiple types in one declaration");
3424 else if (declspecs
->redefined_builtin_type
)
3426 if (!in_system_header
)
3427 pedwarn ("redeclaration of C++ built-in type %qT",
3428 declspecs
->redefined_builtin_type
);
3432 if (TYPE_P (declspecs
->type
)
3433 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
3434 && IS_AGGR_TYPE (declspecs
->type
))
3435 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
3436 declared_type
= declspecs
->type
;
3437 else if (declspecs
->type
== error_mark_node
)
3439 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
3440 pedwarn ("declaration does not declare anything");
3441 /* Check for an anonymous union. */
3442 else if (declared_type
&& IS_AGGR_TYPE_CODE (TREE_CODE (declared_type
))
3443 && TYPE_ANONYMOUS_P (declared_type
))
3445 /* 7/3 In a simple-declaration, the optional init-declarator-list
3446 can be omitted only when declaring a class (clause 9) or
3447 enumeration (7.2), that is, when the decl-specifier-seq contains
3448 either a class-specifier, an elaborated-type-specifier with
3449 a class-key (9.1), or an enum-specifier. In these cases and
3450 whenever a class-specifier or enum-specifier is present in the
3451 decl-specifier-seq, the identifiers in these specifiers are among
3452 the names being declared by the declaration (as class-name,
3453 enum-names, or enumerators, depending on the syntax). In such
3454 cases, and except for the declaration of an unnamed bit-field (9.6),
3455 the decl-specifier-seq shall introduce one or more names into the
3456 program, or shall redeclare a name introduced by a previous
3457 declaration. [Example:
3458 enum { }; // ill-formed
3459 typedef class { }; // ill-formed
3463 error ("missing type-name in typedef-declaration");
3466 /* Anonymous unions are objects, so they can have specifiers. */;
3467 SET_ANON_AGGR_TYPE_P (declared_type
);
3469 if (TREE_CODE (declared_type
) != UNION_TYPE
&& pedantic
3470 && !in_system_header
)
3471 pedwarn ("ISO C++ prohibits anonymous structs");
3476 if (declspecs
->specs
[(int)ds_inline
]
3477 || declspecs
->specs
[(int)ds_virtual
])
3478 error ("`%s' can only be specified for functions",
3479 declspecs
->specs
[(int)ds_inline
]
3480 ? "inline" : "virtual");
3482 && (!current_class_type
3483 || current_scope () != current_class_type
))
3484 error ("`friend' can only be specified inside a class");
3485 else if (declspecs
->specs
[(int)ds_explicit
])
3486 error ("`explicit' can only be specified for constructors");
3487 else if (declspecs
->storage_class
)
3488 error ("a storage class can only be specified for objects "
3490 else if (declspecs
->specs
[(int)ds_const
]
3491 || declspecs
->specs
[(int)ds_volatile
]
3492 || declspecs
->specs
[(int)ds_restrict
]
3493 || declspecs
->specs
[(int)ds_thread
])
3494 error ("qualifiers can only be specified for objects "
3498 return declared_type
;
3501 /* Called when a declaration is seen that contains no names to declare.
3502 If its type is a reference to a structure, union or enum inherited
3503 from a containing scope, shadow that tag name for the current scope
3504 with a forward reference.
3505 If its type defines a new named structure or union
3506 or defines an enum, it is valid but we need not do anything here.
3507 Otherwise, it is an error.
3509 C++: may have to grok the declspecs to learn about static,
3510 complain for anonymous unions.
3512 Returns the TYPE declared -- or NULL_TREE if none. */
3515 shadow_tag (cp_decl_specifier_seq
*declspecs
)
3517 tree t
= check_tag_decl (declspecs
);
3522 maybe_process_partial_specialization (t
);
3524 /* This is where the variables in an anonymous union are
3525 declared. An anonymous union declaration looks like:
3527 because there is no declarator after the union, the parser
3528 sends that declaration here. */
3529 if (ANON_AGGR_TYPE_P (t
))
3531 fixup_anonymous_aggr (t
);
3533 if (TYPE_FIELDS (t
))
3535 tree decl
= grokdeclarator (/*declarator=*/NULL
,
3536 declspecs
, NORMAL
, 0, NULL
);
3537 finish_anon_union (decl
);
3544 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3547 groktypename (cp_decl_specifier_seq
*type_specifiers
,
3548 const cp_declarator
*declarator
)
3552 attrs
= type_specifiers
->attributes
;
3553 type_specifiers
->attributes
= NULL_TREE
;
3554 type
= grokdeclarator (declarator
, type_specifiers
, TYPENAME
, 0, &attrs
);
3556 cplus_decl_attributes (&type
, attrs
, 0);
3560 /* Decode a declarator in an ordinary declaration or data definition.
3561 This is called as soon as the type information and variable name
3562 have been parsed, before parsing the initializer if any.
3563 Here we create the ..._DECL node, fill in its type,
3564 and put it on the list of decls for the current context.
3565 The ..._DECL node is returned as the value.
3567 Exception: for arrays where the length is not specified,
3568 the type is left null, to be filled in by `cp_finish_decl'.
3570 Function definitions do not come here; they go to start_function
3571 instead. However, external and forward declarations of functions
3572 do go through here. Structure field declarations are done by
3573 grokfield and not through here. */
3576 start_decl (const cp_declarator
*declarator
,
3577 cp_decl_specifier_seq
*declspecs
,
3580 tree prefix_attributes
)
3586 /* This should only be done once on the top most decl. */
3587 if (have_extern_spec
)
3589 declspecs
->storage_class
= sc_extern
;
3590 have_extern_spec
= false;
3593 /* An object declared as __attribute__((deprecated)) suppresses
3594 warnings of uses of other deprecated items. */
3595 if (lookup_attribute ("deprecated", attributes
))
3596 deprecated_state
= DEPRECATED_SUPPRESS
;
3598 attributes
= chainon (attributes
, prefix_attributes
);
3600 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
3603 deprecated_state
= DEPRECATED_NORMAL
;
3605 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
)
3608 type
= TREE_TYPE (decl
);
3610 if (type
== error_mark_node
)
3613 context
= DECL_CONTEXT (decl
);
3615 if (initialized
&& context
&& TREE_CODE (context
) == NAMESPACE_DECL
3616 && context
!= current_namespace
&& TREE_CODE (decl
) == VAR_DECL
)
3618 /* When parsing the initializer, lookup should use the object's
3620 push_decl_namespace (context
);
3623 /* We are only interested in class contexts, later. */
3624 if (context
&& TREE_CODE (context
) == NAMESPACE_DECL
)
3625 context
= NULL_TREE
;
3628 /* Is it valid for this decl to have an initializer at all?
3629 If not, set INITIALIZED to zero, which will indirectly
3630 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3631 switch (TREE_CODE (decl
))
3634 error ("typedef `%D' is initialized (use __typeof__ instead)", decl
);
3639 error ("function `%#D' is initialized like a variable", decl
);
3649 if (! toplevel_bindings_p ()
3650 && DECL_EXTERNAL (decl
))
3651 warning ("declaration of `%#D' has `extern' and is initialized",
3653 DECL_EXTERNAL (decl
) = 0;
3654 if (toplevel_bindings_p ())
3655 TREE_STATIC (decl
) = 1;
3657 /* Tell `pushdecl' this is an initialized decl
3658 even though we don't yet have the initializer expression.
3659 Also tell `cp_finish_decl' it may store the real initializer. */
3660 DECL_INITIAL (decl
) = error_mark_node
;
3663 /* Set attributes here so if duplicate decl, will have proper attributes. */
3664 cplus_decl_attributes (&decl
, attributes
, 0);
3666 /* If #pragma weak was used, mark the decl weak now. */
3667 if (global_scope_p (current_binding_level
))
3668 maybe_apply_pragma_weak (decl
);
3670 if (TREE_CODE (decl
) == FUNCTION_DECL
3671 && DECL_DECLARED_INLINE_P (decl
)
3672 && DECL_UNINLINABLE (decl
)
3673 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
3674 warning ("%Jinline function '%D' given attribute noinline", decl
, decl
);
3676 if (context
&& COMPLETE_TYPE_P (complete_type (context
)))
3678 push_nested_class (context
);
3680 if (TREE_CODE (decl
) == VAR_DECL
)
3682 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
3683 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
3684 error ("`%#D' is not a static member of `%#T'", decl
, context
);
3687 if (DECL_CONTEXT (field
) != context
)
3689 if (!same_type_p (DECL_CONTEXT (field
), context
))
3690 pedwarn ("ISO C++ does not permit `%T::%D' to be defined as `%T::%D'",
3691 DECL_CONTEXT (field
), DECL_NAME (decl
),
3692 context
, DECL_NAME (decl
));
3693 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
3695 /* Static data member are tricky; an in-class initialization
3696 still doesn't provide a definition, so the in-class
3697 declaration will have DECL_EXTERNAL set, but will have an
3698 initialization. Thus, duplicate_decls won't warn
3699 about this situation, and so we check here. */
3700 if (DECL_INITIAL (decl
) && DECL_INITIAL (field
))
3701 error ("duplicate initialization of %D", decl
);
3702 if (duplicate_decls (decl
, field
))
3708 tree field
= check_classfn (context
, decl
,
3709 (processing_template_decl
3710 > template_class_depth (context
))
3711 ? current_template_parms
3713 if (field
&& duplicate_decls (decl
, field
))
3717 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3718 DECL_IN_AGGR_P (decl
) = 0;
3719 if ((DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
3720 || CLASSTYPE_TEMPLATE_INSTANTIATION (context
))
3722 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
3723 /* [temp.expl.spec] An explicit specialization of a static data
3724 member of a template is a definition if the declaration
3725 includes an initializer; otherwise, it is a declaration.
3727 We check for processing_specialization so this only applies
3728 to the new specialization syntax. */
3729 if (DECL_INITIAL (decl
) == NULL_TREE
&& processing_specialization
)
3730 DECL_EXTERNAL (decl
) = 1;
3733 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
))
3734 pedwarn ("declaration of `%#D' outside of class is not definition",
3738 /* Enter this declaration into the symbol table. */
3739 tem
= maybe_push_decl (decl
);
3741 if (processing_template_decl
)
3742 tem
= push_template_decl (tem
);
3743 if (tem
== error_mark_node
)
3744 return error_mark_node
;
3746 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3747 /* Tell the back-end to use or not use .common as appropriate. If we say
3748 -fconserve-space, we want this to save .data space, at the expense of
3749 wrong semantics. If we say -fno-conserve-space, we want this to
3750 produce errors about redefs; to do this we force variables into the
3752 DECL_COMMON (tem
) = ((TREE_CODE (tem
) != VAR_DECL
3753 || !DECL_THREAD_LOCAL (tem
))
3754 && (flag_conserve_space
|| ! TREE_PUBLIC (tem
)));
3757 if (! processing_template_decl
)
3764 start_decl_1 (tree decl
)
3766 tree type
= TREE_TYPE (decl
);
3767 int initialized
= (DECL_INITIAL (decl
) != NULL_TREE
);
3769 if (type
== error_mark_node
)
3773 /* Is it valid for this decl to have an initializer at all?
3774 If not, set INITIALIZED to zero, which will indirectly
3775 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3777 /* Don't allow initializations for incomplete types except for
3778 arrays which might be completed by the initialization. */
3779 if (COMPLETE_TYPE_P (complete_type (type
)))
3780 ; /* A complete type is ok. */
3781 else if (TREE_CODE (type
) != ARRAY_TYPE
)
3783 error ("variable `%#D' has initializer but incomplete type",
3786 type
= TREE_TYPE (decl
) = error_mark_node
;
3788 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
3790 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
3791 error ("elements of array `%#D' have incomplete type", decl
);
3792 /* else we already gave an error in start_decl. */
3798 && TREE_CODE (decl
) != TYPE_DECL
3799 && TREE_CODE (decl
) != TEMPLATE_DECL
3800 && type
!= error_mark_node
3801 && IS_AGGR_TYPE (type
)
3802 && ! DECL_EXTERNAL (decl
))
3804 if ((! processing_template_decl
|| ! uses_template_parms (type
))
3805 && !COMPLETE_TYPE_P (complete_type (type
)))
3807 error ("aggregate `%#D' has incomplete type and cannot be defined",
3809 /* Change the type so that assemble_variable will give
3810 DECL an rtl we can live with: (mem (const_int 0)). */
3811 type
= TREE_TYPE (decl
) = error_mark_node
;
3815 /* If any base type in the hierarchy of TYPE needs a constructor,
3816 then we set initialized to 1. This way any nodes which are
3817 created for the purposes of initializing this aggregate
3818 will live as long as it does. This is necessary for global
3819 aggregates which do not have their initializers processed until
3820 the end of the file. */
3821 initialized
= TYPE_NEEDS_CONSTRUCTING (type
);
3826 DECL_INITIAL (decl
) = NULL_TREE
;
3828 /* Create a new scope to hold this declaration if necessary.
3829 Whether or not a new scope is necessary cannot be determined
3830 until after the type has been completed; if the type is a
3831 specialization of a class template it is not until after
3832 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3833 will be set correctly. */
3834 maybe_push_cleanup_level (type
);
3837 /* Handle initialization of references. DECL, TYPE, and INIT have the
3838 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3839 but will be set to a new CLEANUP_STMT if a temporary is created
3840 that must be destroyed subsequently.
3842 Returns an initializer expression to use to initialize DECL, or
3843 NULL if the initialization can be performed statically.
3845 Quotes on semantics can be found in ARM 8.4.3. */
3848 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
3852 if (init
== NULL_TREE
)
3854 if ((DECL_LANG_SPECIFIC (decl
) == 0
3855 || DECL_IN_AGGR_P (decl
) == 0)
3856 && ! DECL_THIS_EXTERN (decl
))
3857 error ("`%D' declared as reference but not initialized", decl
);
3861 if (TREE_CODE (init
) == CONSTRUCTOR
)
3863 error ("ISO C++ forbids use of initializer list to initialize reference `%D'", decl
);
3867 if (TREE_CODE (init
) == TREE_LIST
)
3868 init
= build_x_compound_expr_from_list (init
, "initializer");
3870 if (TREE_CODE (TREE_TYPE (init
)) == REFERENCE_TYPE
)
3871 init
= convert_from_reference (init
);
3873 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
3874 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
3875 /* Note: default conversion is only called in very special cases. */
3876 init
= decay_conversion (init
);
3878 /* Convert INIT to the reference type TYPE. This may involve the
3879 creation of a temporary, whose lifetime must be the same as that
3880 of the reference. If so, a DECL_EXPR for the temporary will be
3881 added just after the DECL_EXPR for DECL. That's why we don't set
3882 DECL_INITIAL for local references (instead assigning to them
3883 explicitly); we need to allow the temporary to be initialized
3885 tmp
= initialize_reference (type
, init
, decl
, cleanup
);
3887 if (tmp
== error_mark_node
)
3889 else if (tmp
== NULL_TREE
)
3891 error ("cannot initialize `%T' from `%T'", type
, TREE_TYPE (init
));
3895 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
3898 DECL_INITIAL (decl
) = tmp
;
3903 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3904 array until we finish parsing the initializer. If that's the
3905 situation we're in, update DECL accordingly. */
3908 maybe_deduce_size_from_array_init (tree decl
, tree init
)
3910 tree type
= TREE_TYPE (decl
);
3912 if (TREE_CODE (type
) == ARRAY_TYPE
3913 && TYPE_DOMAIN (type
) == NULL_TREE
3914 && TREE_CODE (decl
) != TYPE_DECL
)
3916 /* do_default is really a C-ism to deal with tentative definitions.
3917 But let's leave it here to ease the eventual merge. */
3918 int do_default
= !DECL_EXTERNAL (decl
);
3919 tree initializer
= init
? init
: DECL_INITIAL (decl
);
3920 int failure
= complete_array_type (type
, initializer
, do_default
);
3923 error ("initializer fails to determine size of `%D'", decl
);
3928 error ("array size missing in `%D'", decl
);
3929 /* If a `static' var's size isn't known, make it extern as
3930 well as static, so it does not get allocated. If it's not
3931 `static', then don't mark it extern; finish_incomplete_decl
3932 will give it a default size and it will get allocated. */
3933 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
3934 DECL_EXTERNAL (decl
) = 1;
3937 if (pedantic
&& TYPE_DOMAIN (type
) != NULL_TREE
3938 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type
)),
3940 error ("zero-size array `%D'", decl
);
3942 layout_decl (decl
, 0);
3946 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
3947 any appropriate error messages regarding the layout. */
3950 layout_var_decl (tree decl
)
3952 tree type
= TREE_TYPE (decl
);
3954 tree ttype
= target_type (type
);
3957 /* If we haven't already layed out this declaration, do so now.
3958 Note that we must not call complete type for an external object
3959 because it's type might involve templates that we are not
3960 supposed to instantiate yet. (And it's perfectly valid to say
3961 `extern X x' for some incomplete type `X'.) */
3962 if (!DECL_EXTERNAL (decl
))
3963 complete_type (type
);
3964 if (!DECL_SIZE (decl
)
3965 && TREE_TYPE (decl
) != error_mark_node
3966 && (COMPLETE_TYPE_P (type
)
3967 || (TREE_CODE (type
) == ARRAY_TYPE
3968 && !TYPE_DOMAIN (type
)
3969 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
3970 layout_decl (decl
, 0);
3972 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
3974 /* An automatic variable with an incomplete type: that is an error.
3975 Don't talk about array types here, since we took care of that
3976 message in grokdeclarator. */
3977 error ("storage size of `%D' isn't known", decl
);
3978 TREE_TYPE (decl
) = error_mark_node
;
3981 /* Keep this code around in case we later want to control debug info
3982 based on whether a type is "used". (jason 1999-11-11) */
3984 else if (!DECL_EXTERNAL (decl
) && IS_AGGR_TYPE (ttype
))
3985 /* Let debugger know it should output info for this type. */
3986 note_debug_info_needed (ttype
);
3988 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
3989 note_debug_info_needed (DECL_CONTEXT (decl
));
3992 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
3993 && DECL_SIZE (decl
) != NULL_TREE
3994 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
3996 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
3997 constant_expression_warning (DECL_SIZE (decl
));
3999 error ("storage size of `%D' isn't constant", decl
);
4002 if (TREE_STATIC (decl
)
4003 && !DECL_ARTIFICIAL (decl
)
4004 && current_function_decl
4005 && DECL_CONTEXT (decl
) == current_function_decl
)
4006 push_local_name (decl
);
4009 /* If a local static variable is declared in an inline function, or if
4010 we have a weak definition, we must endeavor to create only one
4011 instance of the variable at link-time. */
4014 maybe_commonize_var (tree decl
)
4016 /* Static data in a function with comdat linkage also has comdat
4018 if (TREE_STATIC (decl
)
4019 /* Don't mess with __FUNCTION__. */
4020 && ! DECL_ARTIFICIAL (decl
)
4021 && DECL_FUNCTION_SCOPE_P (decl
)
4022 /* Unfortunately, import_export_decl has not always been called
4023 before the function is processed, so we cannot simply check
4025 && (DECL_COMDAT (DECL_CONTEXT (decl
))
4026 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl
))
4027 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl
)))
4028 && TREE_PUBLIC (DECL_CONTEXT (decl
)))))
4032 /* With weak symbols, we simply make the variable COMDAT;
4033 that will cause copies in multiple translations units to
4035 comdat_linkage (decl
);
4039 if (DECL_INITIAL (decl
) == NULL_TREE
4040 || DECL_INITIAL (decl
) == error_mark_node
)
4042 /* Without weak symbols, we can use COMMON to merge
4043 uninitialized variables. */
4044 TREE_PUBLIC (decl
) = 1;
4045 DECL_COMMON (decl
) = 1;
4049 /* While for initialized variables, we must use internal
4050 linkage -- which means that multiple copies will not
4052 TREE_PUBLIC (decl
) = 0;
4053 DECL_COMMON (decl
) = 0;
4054 cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl
);
4055 warning ("%J you can work around this by removing the initializer",
4060 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4061 /* Set it up again; we might have set DECL_INITIAL since the last
4063 comdat_linkage (decl
);
4066 /* Issue an error message if DECL is an uninitialized const variable. */
4069 check_for_uninitialized_const_var (tree decl
)
4071 tree type
= TREE_TYPE (decl
);
4073 /* ``Unless explicitly declared extern, a const object does not have
4074 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4076 if (TREE_CODE (decl
) == VAR_DECL
4077 && TREE_CODE (type
) != REFERENCE_TYPE
4078 && CP_TYPE_CONST_P (type
)
4079 && !TYPE_NEEDS_CONSTRUCTING (type
)
4080 && !DECL_INITIAL (decl
))
4081 error ("uninitialized const `%D'", decl
);
4084 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4085 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4086 initialized. If there are no more such fields, the return value
4090 next_initializable_field (tree field
)
4093 && (TREE_CODE (field
) != FIELD_DECL
4094 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4095 || DECL_ARTIFICIAL (field
)))
4096 field
= TREE_CHAIN (field
);
4101 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4102 brace-enclosed aggregate initializer.
4104 *INITP is one of a list of initializers describing a brace-enclosed
4105 initializer for an entity of the indicated aggregate TYPE. It may
4106 not presently match the shape of the TYPE; for example:
4108 struct S { int a; int b; };
4109 struct S a[] = { 1, 2, 3, 4 };
4111 Here *INITP will point to TREE_LIST of four elements, rather than a
4112 list of two elements, each itself a list of two elements. This
4113 routine transforms INIT from the former form into the latter. The
4114 revised initializer is returned. */
4117 reshape_init (tree type
, tree
*initp
)
4121 tree old_init_value
;
4123 bool brace_enclosed_p
;
4126 old_init_value
= (TREE_CODE (*initp
) == TREE_LIST
4127 ? TREE_VALUE (*initp
) : old_init
);
4129 my_friendly_assert (old_init_value
, 20030723);
4131 /* If the initializer is brace-enclosed, pull initializers from the
4132 enclosed elements. Advance past the brace-enclosed initializer
4134 if (TREE_CODE (old_init_value
) == CONSTRUCTOR
4135 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value
))
4137 *initp
= TREE_CHAIN (old_init
);
4138 TREE_CHAIN (old_init
) = NULL_TREE
;
4139 inits
= CONSTRUCTOR_ELTS (old_init_value
);
4141 brace_enclosed_p
= true;
4146 brace_enclosed_p
= false;
4149 /* A non-aggregate type is always initialized with a single
4151 if (!CP_AGGREGATE_TYPE_P (type
))
4153 *initp
= TREE_CHAIN (old_init
);
4154 TREE_CHAIN (old_init
) = NULL_TREE
;
4155 /* It is invalid to initialize a non-aggregate type with a
4156 brace-enclosed initializer. */
4157 if (brace_enclosed_p
)
4159 error ("brace-enclosed initializer used to initialize `%T'",
4161 if (TREE_CODE (old_init
) == TREE_LIST
)
4162 TREE_VALUE (old_init
) = error_mark_node
;
4164 old_init
= error_mark_node
;
4172 All implicit type conversions (clause _conv_) are considered when
4173 initializing the aggregate member with an initializer from an
4174 initializer-list. If the initializer can initialize a member,
4175 the member is initialized. Otherwise, if the member is itself a
4176 non-empty subaggregate, brace elision is assumed and the
4177 initializer is considered for the initialization of the first
4178 member of the subaggregate. */
4179 if (!brace_enclosed_p
4180 && can_convert_arg (type
, TREE_TYPE (old_init_value
), old_init_value
))
4182 *initp
= TREE_CHAIN (old_init
);
4183 TREE_CHAIN (old_init
) = NULL_TREE
;
4187 if (TREE_CODE (old_init_value
) == STRING_CST
4188 && TREE_CODE (type
) == ARRAY_TYPE
4189 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
4191 /* [dcl.init.string]
4193 A char array (whether plain char, signed char, or unsigned char)
4194 can be initialized by a string-literal (optionally enclosed in
4195 braces); a wchar_t array can be initialized by a wide
4196 string-literal (optionally enclosed in braces). */
4197 new_init
= old_init
;
4198 /* Move past the initializer. */
4199 *initp
= TREE_CHAIN (old_init
);
4200 TREE_CHAIN (old_init
) = NULL_TREE
;
4204 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4205 new_init
= build_constructor (NULL_TREE
, NULL_TREE
);
4207 if (CLASS_TYPE_P (type
))
4211 field
= next_initializable_field (TYPE_FIELDS (type
));
4217 An initializer for an aggregate member that is an
4218 empty class shall have the form of an empty
4219 initializer-list {}. */
4220 if (!brace_enclosed_p
)
4222 error ("initializer for `%T' must be brace-enclosed",
4224 return error_mark_node
;
4229 /* Loop through the initializable fields, gathering
4235 /* Handle designated initializers, as an extension. */
4236 if (TREE_PURPOSE (*initp
))
4239 pedwarn ("ISO C++ does not allow designated initializers");
4240 field
= lookup_field_1 (type
, TREE_PURPOSE (*initp
),
4241 /*want_type=*/false);
4242 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
4243 error ("`%T' has no non-static data member named `%D'",
4244 type
, TREE_PURPOSE (*initp
));
4249 field_init
= reshape_init (TREE_TYPE (field
), initp
);
4250 if (field_init
== error_mark_node
)
4251 return error_mark_node
;
4252 TREE_CHAIN (field_init
) = CONSTRUCTOR_ELTS (new_init
);
4253 CONSTRUCTOR_ELTS (new_init
) = field_init
;
4256 When a union is initialized with a brace-enclosed
4257 initializer, the braces shall only contain an
4258 initializer for the first member of the union. */
4259 if (TREE_CODE (type
) == UNION_TYPE
)
4261 field
= next_initializable_field (TREE_CHAIN (field
));
4265 else if (TREE_CODE (type
) == ARRAY_TYPE
4266 || TREE_CODE (type
) == VECTOR_TYPE
)
4271 /* If the bound of the array is known, take no more initializers
4272 than are allowed. */
4273 max_index
= NULL_TREE
;
4274 if (TREE_CODE (type
) == ARRAY_TYPE
)
4276 if (TYPE_DOMAIN (type
))
4277 max_index
= array_type_nelts (type
);
4281 /* For a vector, the representation type is a struct
4282 containing a single member which is an array of the
4283 appropriate size. */
4284 tree rtype
= TYPE_DEBUG_REPRESENTATION_TYPE (type
);
4285 if (rtype
&& TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype
))))
4286 max_index
= array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype
)));
4289 /* Loop through the array elements, gathering initializers. */
4290 for (index
= size_zero_node
;
4291 *initp
&& (!max_index
|| !tree_int_cst_lt (max_index
, index
));
4292 index
= size_binop (PLUS_EXPR
, index
, size_one_node
))
4296 element_init
= reshape_init (TREE_TYPE (type
), initp
);
4297 if (element_init
== error_mark_node
)
4298 return error_mark_node
;
4299 TREE_CHAIN (element_init
) = CONSTRUCTOR_ELTS (new_init
);
4300 CONSTRUCTOR_ELTS (new_init
) = element_init
;
4301 if (TREE_PURPOSE (element_init
))
4303 tree next_index
= TREE_PURPOSE (element_init
);
4304 if (TREE_CODE (next_index
) == IDENTIFIER_NODE
)
4306 error ("name `%D' used in a GNU-style designated "
4307 "initializer for an array", next_index
);
4308 TREE_PURPOSE (element_init
) = NULL_TREE
;
4318 /* The initializers were placed in reverse order in the
4320 CONSTRUCTOR_ELTS (new_init
) = nreverse (CONSTRUCTOR_ELTS (new_init
));
4322 if (TREE_CODE (old_init
) == TREE_LIST
)
4323 new_init
= build_tree_list (TREE_PURPOSE (old_init
), new_init
);
4326 /* If this was a brace-enclosed initializer and all of the
4327 initializers were not used up, there is a problem. */
4328 if (brace_enclosed_p
&& *initp
)
4329 error ("too many initializers for `%T'", type
);
4334 /* Verify INIT (the initializer for DECL), and record the
4335 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4336 grok_reference_init.
4338 If the return value is non-NULL, it is an expression that must be
4339 evaluated dynamically to initialize DECL. */
4342 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
4344 tree type
= TREE_TYPE (decl
);
4345 tree init_code
= NULL
;
4347 /* If `start_decl' didn't like having an initialization, ignore it now. */
4348 if (init
!= NULL_TREE
&& DECL_INITIAL (decl
) == NULL_TREE
)
4351 /* If an initializer is present, DECL_INITIAL has been
4352 error_mark_node, to indicate that an as-of-yet unevaluated
4353 initialization will occur. From now on, DECL_INITIAL reflects
4354 the static initialization -- if any -- of DECL. */
4355 DECL_INITIAL (decl
) = NULL_TREE
;
4357 /* Things that are going to be initialized need to have complete
4359 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
4361 if (type
== error_mark_node
)
4362 /* We will have already complained. */
4364 else if (init
&& COMPLETE_TYPE_P (type
)
4365 && !TREE_CONSTANT (TYPE_SIZE (type
)))
4367 error ("variable-sized object `%D' may not be initialized", decl
);
4370 else if (TREE_CODE (type
) == ARRAY_TYPE
4371 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4373 error ("elements of array `%#D' have incomplete type", decl
);
4376 else if (TREE_CODE (type
) != ARRAY_TYPE
&& !COMPLETE_TYPE_P (type
))
4378 error ("`%D' has incomplete type", decl
);
4379 TREE_TYPE (decl
) = error_mark_node
;
4383 if (TREE_CODE (decl
) == CONST_DECL
)
4385 my_friendly_assert (TREE_CODE (decl
) != REFERENCE_TYPE
, 148);
4387 DECL_INITIAL (decl
) = init
;
4389 my_friendly_assert (init
!= NULL_TREE
, 149);
4392 else if (!DECL_EXTERNAL (decl
) && TREE_CODE (type
) == REFERENCE_TYPE
)
4393 init
= grok_reference_init (decl
, type
, init
, cleanup
);
4396 if (TREE_CODE (init
) == CONSTRUCTOR
4397 && BRACE_ENCLOSED_INITIALIZER_P (init
))
4399 /* [dcl.init] paragraph 13,
4400 If T is a scalar type, then a declaration of the form
4405 reshape_init will complain about the extra braces,
4406 and doesn't do anything useful in the case where TYPE is
4407 scalar, so just don't call it. */
4408 if (CP_AGGREGATE_TYPE_P (type
))
4409 init
= reshape_init (type
, &init
);
4411 if ((*targetm
.vector_opaque_p
) (type
))
4413 error ("opaque vector types cannot be initialized");
4414 init
= error_mark_node
;
4418 /* If DECL has an array type without a specific bound, deduce the
4419 array size from the initializer. */
4420 maybe_deduce_size_from_array_init (decl
, init
);
4421 type
= TREE_TYPE (decl
);
4423 if (TYPE_HAS_CONSTRUCTOR (type
) || TYPE_NEEDS_CONSTRUCTING (type
))
4425 if (TREE_CODE (type
) == ARRAY_TYPE
)
4426 goto initialize_aggr
;
4427 else if (TREE_CODE (init
) == CONSTRUCTOR
4428 && BRACE_ENCLOSED_INITIALIZER_P (init
))
4430 if (TYPE_NON_AGGREGATE_CLASS (type
))
4432 error ("`%D' must be initialized by constructor, not by `{...}'",
4434 init
= error_mark_node
;
4437 goto dont_use_constructor
;
4441 int saved_stmts_are_full_exprs_p
;
4444 saved_stmts_are_full_exprs_p
= 0;
4445 if (building_stmt_tree ())
4447 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4448 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4450 init
= build_aggr_init (decl
, init
, flags
);
4451 if (building_stmt_tree ())
4452 current_stmt_tree ()->stmts_are_full_exprs_p
=
4453 saved_stmts_are_full_exprs_p
;
4459 dont_use_constructor
:
4460 if (TREE_CODE (init
) != TREE_VEC
)
4462 init_code
= store_init_value (decl
, init
);
4467 else if (DECL_EXTERNAL (decl
))
4469 else if (TYPE_P (type
) && TYPE_NEEDS_CONSTRUCTING (type
))
4470 goto initialize_aggr
;
4471 else if (IS_AGGR_TYPE (type
))
4473 tree core_type
= strip_array_types (type
);
4475 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
))
4476 error ("structure `%D' with uninitialized const members", decl
);
4477 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
))
4478 error ("structure `%D' with uninitialized reference members",
4481 check_for_uninitialized_const_var (decl
);
4484 check_for_uninitialized_const_var (decl
);
4486 if (init
&& init
!= error_mark_node
)
4487 init_code
= build (INIT_EXPR
, type
, decl
, init
);
4492 /* If DECL is not a local variable, give it RTL. */
4495 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
4497 int toplev
= toplevel_bindings_p ();
4500 /* Handle non-variables up front. */
4501 if (TREE_CODE (decl
) != VAR_DECL
)
4503 rest_of_decl_compilation (decl
, asmspec
, toplev
, at_eof
);
4507 /* If we see a class member here, it should be a static data
4509 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
4511 my_friendly_assert (TREE_STATIC (decl
), 19990828);
4512 /* An in-class declaration of a static data member should be
4513 external; it is only a declaration, and not a definition. */
4514 if (init
== NULL_TREE
)
4515 my_friendly_assert (DECL_EXTERNAL (decl
), 20000723);
4518 /* Set the DECL_ASSEMBLER_NAME for the variable. */
4521 change_decl_assembler_name (decl
, get_identifier (asmspec
));
4522 /* The `register' keyword, when used together with an
4523 asm-specification, indicates that the variable should be
4524 placed in a particular register. */
4525 if (DECL_REGISTER (decl
))
4526 DECL_HARD_REGISTER (decl
) = 1;
4529 /* We don't create any RTL for local variables. */
4530 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
4533 /* We defer emission of local statics until the corresponding
4534 DECL_EXPR is expanded. */
4535 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
4537 /* We try to defer namespace-scope static constants so that they are
4538 not emitted into the object file unnecessarily. */
4539 if (!DECL_VIRTUAL_P (decl
)
4540 && TREE_READONLY (decl
)
4541 && DECL_INITIAL (decl
) != NULL_TREE
4542 && DECL_INITIAL (decl
) != error_mark_node
4543 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
4545 && !TREE_PUBLIC (decl
))
4547 /* Fool with the linkage of static consts according to #pragma
4549 if (!interface_unknown
&& !TREE_PUBLIC (decl
))
4551 TREE_PUBLIC (decl
) = 1;
4552 DECL_EXTERNAL (decl
) = interface_only
;
4557 /* Likewise for template instantiations. */
4558 else if (DECL_COMDAT (decl
))
4561 /* If we're deferring the variable, we only need to make RTL if
4562 there's an ASMSPEC. Otherwise, we'll lazily create it later when
4563 we need it. (There's no way to lazily create RTL for things that
4564 have assembly specs because the information about the specifier
4565 isn't stored in the tree, yet) */
4566 if (defer_p
&& asmspec
)
4567 make_decl_rtl (decl
, asmspec
);
4568 /* If we're not deferring, go ahead and assemble the variable. */
4570 rest_of_decl_compilation (decl
, asmspec
, toplev
, at_eof
);
4573 /* Generate code to initialize DECL (a local variable). */
4576 initialize_local_var (tree decl
, tree init
)
4578 tree type
= TREE_TYPE (decl
);
4581 my_friendly_assert (TREE_CODE (decl
) == VAR_DECL
4582 || TREE_CODE (decl
) == RESULT_DECL
,
4584 my_friendly_assert (!TREE_STATIC (decl
), 20021010);
4586 if (DECL_SIZE (decl
) == NULL_TREE
)
4588 /* If we used it already as memory, it must stay in memory. */
4589 DECL_INITIAL (decl
) = NULL_TREE
;
4590 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
4593 if (DECL_SIZE (decl
) && type
!= error_mark_node
)
4597 /* Compute and store the initial value. */
4598 already_used
= TREE_USED (decl
) || TREE_USED (type
);
4600 /* Perform the initialization. */
4603 int saved_stmts_are_full_exprs_p
;
4605 my_friendly_assert (building_stmt_tree (), 20000906);
4606 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
4607 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
4608 finish_expr_stmt (init
);
4609 current_stmt_tree ()->stmts_are_full_exprs_p
=
4610 saved_stmts_are_full_exprs_p
;
4613 /* Set this to 0 so we can tell whether an aggregate which was
4614 initialized was ever used. Don't do this if it has a
4615 destructor, so we don't complain about the 'resource
4616 allocation is initialization' idiom. Now set
4617 attribute((unused)) on types so decls of that type will be
4618 marked used. (see TREE_USED, above.) */
4619 if (TYPE_NEEDS_CONSTRUCTING (type
)
4621 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
4622 && DECL_NAME (decl
))
4623 TREE_USED (decl
) = 0;
4624 else if (already_used
)
4625 TREE_USED (decl
) = 1;
4628 /* Generate a cleanup, if necessary. */
4629 cleanup
= cxx_maybe_build_cleanup (decl
);
4630 if (DECL_SIZE (decl
) && cleanup
)
4631 finish_decl_cleanup (decl
, cleanup
);
4634 /* Finish processing of a declaration;
4635 install its line number and initial value.
4636 If the length of an array type is not known before,
4637 it must be determined now, from the initial value, or it is an error.
4639 INIT holds the value of an initializer that should be allowed to escape
4642 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4643 if the (init) syntax was used. */
4646 cp_finish_decl (tree decl
, tree init
, tree asmspec_tree
, int flags
)
4649 tree ttype
= NULL_TREE
;
4651 const char *asmspec
= NULL
;
4652 int was_readonly
= 0;
4654 if (decl
== error_mark_node
)
4659 error ("assignment (not initialization) in declaration");
4663 my_friendly_assert (TREE_CODE (decl
) != RESULT_DECL
, 20030619);
4665 /* Assume no cleanup is required. */
4666 cleanup
= NULL_TREE
;
4668 /* If a name was specified, get the string. */
4669 if (global_scope_p (current_binding_level
))
4670 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
4672 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
4674 if (init
&& TREE_CODE (init
) == NAMESPACE_DECL
)
4676 error ("cannot initialize `%D' to namespace `%D'",
4681 if (current_class_type
4682 && CP_DECL_CONTEXT (decl
) == current_class_type
4683 && TYPE_BEING_DEFINED (current_class_type
)
4684 && (DECL_INITIAL (decl
) || init
))
4685 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
4687 if (TREE_CODE (decl
) == VAR_DECL
4688 && DECL_CONTEXT (decl
)
4689 && TREE_CODE (DECL_CONTEXT (decl
)) == NAMESPACE_DECL
4690 && DECL_CONTEXT (decl
) != current_namespace
4693 /* Leave the namespace of the object. */
4694 pop_decl_namespace ();
4697 type
= TREE_TYPE (decl
);
4699 if (type
== error_mark_node
)
4702 if (TYPE_HAS_MUTABLE_P (type
))
4703 TREE_READONLY (decl
) = 0;
4705 if (processing_template_decl
)
4707 /* Add this declaration to the statement-tree. */
4708 if (at_function_scope_p ())
4709 add_decl_expr (decl
);
4711 if (init
&& DECL_INITIAL (decl
))
4712 DECL_INITIAL (decl
) = init
;
4713 if (TREE_CODE (decl
) == VAR_DECL
4714 && !DECL_PRETTY_FUNCTION_P (decl
)
4715 && !dependent_type_p (TREE_TYPE (decl
)))
4716 maybe_deduce_size_from_array_init (decl
, init
);
4720 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4721 my_friendly_assert (TREE_CODE (decl
) != PARM_DECL
, 19990828);
4723 /* Take care of TYPE_DECLs up front. */
4724 if (TREE_CODE (decl
) == TYPE_DECL
)
4726 if (type
!= error_mark_node
4727 && IS_AGGR_TYPE (type
) && DECL_NAME (decl
))
4729 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
4730 warning ("shadowing previous type declaration of `%#D'", decl
);
4731 set_identifier_type_value (DECL_NAME (decl
), decl
);
4734 /* If we have installed this as the canonical typedef for this
4735 type, and that type has not been defined yet, delay emitting
4736 the debug information for it, as we will emit it later. */
4737 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
4738 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
4739 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
4741 rest_of_decl_compilation (decl
, NULL
,
4742 DECL_CONTEXT (decl
) == NULL_TREE
, at_eof
);
4746 if (TREE_CODE (decl
) != FUNCTION_DECL
)
4747 ttype
= target_type (type
);
4750 /* Currently, GNU C++ puts constants in text space, making them
4751 impossible to initialize. In the future, one would hope for
4752 an operating system which understood the difference between
4753 initialization and the running of a program. */
4754 if (! DECL_EXTERNAL (decl
) && TREE_READONLY (decl
))
4757 if (TYPE_NEEDS_CONSTRUCTING (type
)
4758 || TREE_CODE (type
) == REFERENCE_TYPE
)
4759 TREE_READONLY (decl
) = 0;
4762 if (TREE_CODE (decl
) == VAR_DECL
)
4764 /* Only PODs can have thread-local storage. Other types may require
4765 various kinds of non-trivial initialization. */
4766 if (DECL_THREAD_LOCAL (decl
) && !pod_type_p (TREE_TYPE (decl
)))
4767 error ("`%D' cannot be thread-local because it has non-POD type `%T'",
4768 decl
, TREE_TYPE (decl
));
4769 /* Convert the initializer to the type of DECL, if we have not
4770 already initialized DECL. */
4771 if (!DECL_INITIALIZED_P (decl
)
4772 /* If !DECL_EXTERNAL then DECL is being defined. In the
4773 case of a static data member initialized inside the
4774 class-specifier, there can be an initializer even if DECL
4775 is *not* defined. */
4776 && (!DECL_EXTERNAL (decl
) || init
))
4778 init
= check_initializer (decl
, init
, flags
, &cleanup
);
4779 /* Thread-local storage cannot be dynamically initialized. */
4780 if (DECL_THREAD_LOCAL (decl
) && init
)
4782 error ("`%D' is thread-local and so cannot be dynamically "
4783 "initialized", decl
);
4790 The memory occupied by any object of static storage
4791 duration is zero-initialized at program startup before
4792 any other initialization takes place.
4794 We cannot create an appropriate initializer until after
4795 the type of DECL is finalized. If DECL_INITIAL is set,
4796 then the DECL is statically initialized, and any
4797 necessary zero-initialization has already been performed. */
4798 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
4799 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
4800 /*nelts=*/NULL_TREE
,
4801 /*static_storage_p=*/true);
4802 /* Remember that the initialization for this variable has
4804 DECL_INITIALIZED_P (decl
) = 1;
4806 /* If the variable has an array type, lay out the type, even if
4807 there is no initializer. It is valid to index through the
4808 array, and we must get TYPE_ALIGN set correctly on the array
4810 else if (TREE_CODE (type
) == ARRAY_TYPE
)
4814 /* Add this declaration to the statement-tree. This needs to happen
4815 after the call to check_initializer so that the DECL_EXPR for a
4816 reference temp is added before the DECL_EXPR for the reference itself. */
4817 if (at_function_scope_p ())
4818 add_decl_expr (decl
);
4820 if (TREE_CODE (decl
) == VAR_DECL
)
4821 layout_var_decl (decl
);
4823 /* Output the assembler code and/or RTL code for variables and functions,
4824 unless the type is an undefined structure or union.
4825 If not, it will get done when the type is completed. */
4826 if (TREE_CODE (decl
) == VAR_DECL
|| TREE_CODE (decl
) == FUNCTION_DECL
)
4828 if (TREE_CODE (decl
) == VAR_DECL
)
4829 maybe_commonize_var (decl
);
4831 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
4833 if (TREE_CODE (type
) == FUNCTION_TYPE
4834 || TREE_CODE (type
) == METHOD_TYPE
)
4835 abstract_virtuals_error (decl
,
4836 strip_array_types (TREE_TYPE (type
)));
4837 else if (POINTER_TYPE_P (type
) || TREE_CODE (type
) == ARRAY_TYPE
)
4839 /* If it's either a pointer or an array type, strip through all
4840 of them but the last one. If the last is an array type, issue
4841 an error if the element type is abstract. */
4842 while (POINTER_TYPE_P (TREE_TYPE (type
))
4843 || TREE_CODE (TREE_TYPE (type
)) == ARRAY_TYPE
)
4844 type
= TREE_TYPE (type
);
4845 if (TREE_CODE (type
) == ARRAY_TYPE
)
4846 abstract_virtuals_error (decl
, TREE_TYPE (type
));
4849 abstract_virtuals_error (decl
, type
);
4851 if (TREE_CODE (decl
) == FUNCTION_DECL
4852 || TREE_TYPE (decl
) == error_mark_node
)
4853 /* No initialization required. */
4855 else if (DECL_EXTERNAL (decl
)
4856 && ! (DECL_LANG_SPECIFIC (decl
)
4857 && DECL_NOT_REALLY_EXTERN (decl
)))
4860 DECL_INITIAL (decl
) = init
;
4864 /* A variable definition. */
4865 if (DECL_FUNCTION_SCOPE_P (decl
))
4867 /* This is a local declaration. */
4868 maybe_inject_for_scope_var (decl
);
4869 /* Initialize the local variable. */
4870 if (processing_template_decl
)
4872 if (init
|| DECL_INITIAL (decl
) == error_mark_node
)
4873 DECL_INITIAL (decl
) = init
;
4875 else if (!TREE_STATIC (decl
))
4876 initialize_local_var (decl
, init
);
4879 if (TREE_STATIC (decl
))
4880 expand_static_init (decl
, init
);
4884 /* Undo call to `pushclass' that was done in `start_decl'
4885 due to initialization of qualified member variable.
4886 I.e., Foo::x = 10; */
4888 tree context
= CP_DECL_CONTEXT (decl
);
4891 && (TREE_CODE (decl
) == VAR_DECL
4892 /* We also have a pushclass done that we need to undo here
4893 if we're at top level and declare a method. */
4894 || TREE_CODE (decl
) == FUNCTION_DECL
)
4895 /* If size hasn't been set, we're still defining it,
4896 and therefore inside the class body; don't pop
4897 the binding level.. */
4898 && COMPLETE_TYPE_P (context
)
4899 && context
== current_class_type
)
4900 pop_nested_class ();
4904 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
4905 reference, insert it in the statement-tree now. */
4907 push_cleanup (decl
, cleanup
, false);
4912 TREE_READONLY (decl
) = 1;
4914 /* If this was marked 'used', be sure it will be output. */
4915 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl
)))
4916 mark_decl_referenced (decl
);
4919 /* This is here for a midend callback from c-common.c. */
4922 finish_decl (tree decl
, tree init
, tree asmspec_tree
)
4924 cp_finish_decl (decl
, init
, asmspec_tree
, 0);
4927 /* Returns a declaration for a VAR_DECL as if:
4929 extern "C" TYPE NAME;
4931 had been seen. Used to create compiler-generated global
4935 declare_global_var (tree name
, tree type
)
4939 push_to_top_level ();
4940 decl
= build_decl (VAR_DECL
, name
, type
);
4941 TREE_PUBLIC (decl
) = 1;
4942 DECL_EXTERNAL (decl
) = 1;
4943 DECL_ARTIFICIAL (decl
) = 1;
4945 cp_finish_decl (decl
, NULL_TREE
, NULL_TREE
, 0);
4946 pop_from_top_level ();
4951 /* Returns a pointer to the `atexit' function. Note that if
4952 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
4953 `__cxa_atexit' function specified in the IA64 C++ ABI. */
4956 get_atexit_node (void)
4967 if (flag_use_cxa_atexit
)
4969 /* The declaration for `__cxa_atexit' is:
4971 int __cxa_atexit (void (*)(void *), void *, void *)
4973 We build up the argument types and then then function type
4976 /* First, build the pointer-to-function type for the first
4978 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
4979 fn_type
= build_function_type (void_type_node
, arg_types
);
4980 fn_ptr_type
= build_pointer_type (fn_type
);
4981 /* Then, build the rest of the argument types. */
4982 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
4983 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
4984 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
4985 /* And the final __cxa_atexit type. */
4986 fn_type
= build_function_type (integer_type_node
, arg_types
);
4987 fn_ptr_type
= build_pointer_type (fn_type
);
4988 name
= "__cxa_atexit";
4992 /* The declaration for `atexit' is:
4994 int atexit (void (*)());
4996 We build up the argument types and then then function type
4998 fn_type
= build_function_type (void_type_node
, void_list_node
);
4999 fn_ptr_type
= build_pointer_type (fn_type
);
5000 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, void_list_node
);
5001 /* Build the final atexit type. */
5002 fn_type
= build_function_type (integer_type_node
, arg_types
);
5006 /* Now, build the function declaration. */
5007 push_lang_context (lang_name_c
);
5008 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
5009 mark_used (atexit_fndecl
);
5010 pop_lang_context ();
5011 atexit_node
= decay_conversion (atexit_fndecl
);
5016 /* Returns the __dso_handle VAR_DECL. */
5019 get_dso_handle_node (void)
5021 if (dso_handle_node
)
5022 return dso_handle_node
;
5024 /* Declare the variable. */
5025 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
5028 return dso_handle_node
;
5031 /* Begin a new function with internal linkage whose job will be simply
5032 to destroy some particular variable. */
5034 static GTY(()) int start_cleanup_cnt
;
5037 start_cleanup_fn (void)
5039 int old_interface_only
= interface_only
;
5040 int old_interface_unknown
= interface_unknown
;
5046 push_to_top_level ();
5048 /* No need to mangle this. */
5049 push_lang_context (lang_name_c
);
5052 interface_unknown
= 1;
5054 /* Build the parameter-types. */
5055 parmtypes
= void_list_node
;
5056 /* Functions passed to __cxa_atexit take an additional parameter.
5057 We'll just ignore it. After we implement the new calling
5058 convention for destructors, we can eliminate the use of
5059 additional cleanup functions entirely in the -fnew-abi case. */
5060 if (flag_use_cxa_atexit
)
5061 parmtypes
= tree_cons (NULL_TREE
, ptr_type_node
, parmtypes
);
5062 /* Build the function type itself. */
5063 fntype
= build_function_type (void_type_node
, parmtypes
);
5064 /* Build the name of the function. */
5065 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
5066 /* Build the function declaration. */
5067 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
5068 /* It's a function with internal linkage, generated by the
5070 TREE_PUBLIC (fndecl
) = 0;
5071 DECL_ARTIFICIAL (fndecl
) = 1;
5072 /* Make the function `inline' so that it is only emitted if it is
5073 actually needed. It is unlikely that it will be inlined, since
5074 it is only called via a function pointer, but we avoid unnecessary
5075 emissions this way. */
5076 DECL_INLINE (fndecl
) = 1;
5077 DECL_DECLARED_INLINE_P (fndecl
) = 1;
5078 DECL_INTERFACE_KNOWN (fndecl
) = 1;
5079 /* Build the parameter. */
5080 if (flag_use_cxa_atexit
)
5084 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
5085 DECL_CONTEXT (parmdecl
) = fndecl
;
5086 TREE_USED (parmdecl
) = 1;
5087 DECL_ARGUMENTS (fndecl
) = parmdecl
;
5091 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
5093 interface_unknown
= old_interface_unknown
;
5094 interface_only
= old_interface_only
;
5096 pop_lang_context ();
5098 return current_function_decl
;
5101 /* Finish the cleanup function begun by start_cleanup_fn. */
5104 end_cleanup_fn (void)
5106 expand_or_defer_fn (finish_function (0));
5108 pop_from_top_level ();
5111 /* Generate code to handle the destruction of DECL, an object with
5112 static storage duration. */
5115 register_dtor_fn (tree decl
)
5122 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5125 /* Call build_cleanup before we enter the anonymous function so that
5126 any access checks will be done relative to the current scope,
5127 rather than the scope of the anonymous function. */
5128 build_cleanup (decl
);
5130 /* Now start the function. */
5131 cleanup
= start_cleanup_fn ();
5133 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5134 to the original function, rather than the anonymous one. That
5135 will make the back-end think that nested functions are in use,
5136 which causes confusion. */
5138 push_deferring_access_checks (dk_no_check
);
5139 fcall
= build_cleanup (decl
);
5140 pop_deferring_access_checks ();
5142 /* Create the body of the anonymous function. */
5143 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
5144 finish_expr_stmt (fcall
);
5145 finish_compound_stmt (compound_stmt
);
5148 /* Call atexit with the cleanup function. */
5149 cxx_mark_addressable (cleanup
);
5150 mark_used (cleanup
);
5151 cleanup
= build_unary_op (ADDR_EXPR
, cleanup
, 0);
5152 if (flag_use_cxa_atexit
)
5154 args
= tree_cons (NULL_TREE
,
5155 build_unary_op (ADDR_EXPR
, get_dso_handle_node (), 0),
5157 args
= tree_cons (NULL_TREE
, null_pointer_node
, args
);
5158 args
= tree_cons (NULL_TREE
, cleanup
, args
);
5161 args
= tree_cons (NULL_TREE
, cleanup
, NULL_TREE
);
5162 finish_expr_stmt (build_function_call (get_atexit_node (), args
));
5165 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5166 is its initializer. Generate code to handle the construction
5167 and destruction of DECL. */
5170 expand_static_init (tree decl
, tree init
)
5172 my_friendly_assert (TREE_CODE (decl
) == VAR_DECL
, 20021010);
5173 my_friendly_assert (TREE_STATIC (decl
), 20021010);
5175 /* Some variables require no initialization. */
5177 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
5178 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
5181 if (! toplevel_bindings_p ())
5183 /* Emit code to perform this initialization but once. */
5190 /* Emit code to perform this initialization but once. This code
5193 static int guard = 0;
5195 // Do initialization.
5197 // Register variable for destruction at end of program.
5200 Note that the `temp' variable is only set to 1 *after* the
5201 initialization is complete. This ensures that an exception,
5202 thrown during the construction, will cause the variable to
5203 reinitialized when we pass through this code again, as per:
5207 If the initialization exits by throwing an exception, the
5208 initialization is not complete, so it will be tried again
5209 the next time control enters the declaration.
5211 In theory, this process should be thread-safe, too; multiple
5212 threads should not be able to initialize the variable more
5213 than once. We don't yet attempt to ensure thread-safety. */
5215 /* Create the guard variable. */
5216 guard
= get_guard (decl
);
5218 /* Begin the conditional initialization. */
5219 if_stmt
= begin_if_stmt ();
5220 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
5221 then_clause
= begin_compound_stmt (0);
5223 /* Do the initialization itself. */
5224 assignment
= init
? init
: NULL_TREE
;
5226 /* Once the assignment is complete, set TEMP to 1. Since the
5227 construction of the static object is complete at this point,
5228 we want to make sure TEMP is set to 1 even if a temporary
5229 constructed during the initialization throws an exception
5230 when it is destroyed. So, we combine the initialization and
5231 the assignment to TEMP into a single expression, ensuring
5232 that when we call finish_expr_stmt the cleanups will not be
5233 run until after TEMP is set to 1. */
5234 guard_init
= set_guard (guard
);
5236 assignment
= build_compound_expr (assignment
, guard_init
);
5238 assignment
= guard_init
;
5239 finish_expr_stmt (assignment
);
5241 /* Use atexit to register a function for destroying this static
5243 register_dtor_fn (decl
);
5245 finish_compound_stmt (then_clause
);
5246 finish_then_clause (if_stmt
);
5247 finish_if_stmt (if_stmt
);
5250 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
5254 /* Make TYPE a complete type based on INITIAL_VALUE.
5255 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5256 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5259 complete_array_type (tree type
, tree initial_value
, int do_default
)
5261 tree maxindex
= NULL_TREE
;
5266 /* An array of character type can be initialized from a
5267 brace-enclosed string constant. */
5268 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
)))
5269 && TREE_CODE (initial_value
) == CONSTRUCTOR
5270 && CONSTRUCTOR_ELTS (initial_value
)
5271 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value
)))
5273 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value
)) == NULL_TREE
)
5274 initial_value
= TREE_VALUE (CONSTRUCTOR_ELTS (initial_value
));
5276 /* Note MAXINDEX is really the maximum index, one less than the
5278 if (TREE_CODE (initial_value
) == STRING_CST
)
5281 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value
)));
5282 maxindex
= build_int_2 ((TREE_STRING_LENGTH (initial_value
)
5285 else if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
5287 tree elts
= CONSTRUCTOR_ELTS (initial_value
);
5289 maxindex
= ssize_int (-1);
5290 for (; elts
; elts
= TREE_CHAIN (elts
))
5292 if (TREE_PURPOSE (elts
))
5293 maxindex
= TREE_PURPOSE (elts
);
5295 maxindex
= size_binop (PLUS_EXPR
, maxindex
, ssize_int (1));
5297 maxindex
= copy_node (maxindex
);
5301 /* Make an error message unless that happened already. */
5302 if (initial_value
!= error_mark_node
)
5305 initial_value
= NULL_TREE
;
5307 /* Prevent further error messages. */
5308 maxindex
= build_int_2 (0, 0);
5315 maxindex
= build_int_2 (0, 0);
5325 domain
= build_index_type (maxindex
);
5326 TYPE_DOMAIN (type
) = domain
;
5328 if (! TREE_TYPE (maxindex
))
5329 TREE_TYPE (maxindex
) = domain
;
5331 itype
= TREE_TYPE (initial_value
);
5334 if (itype
&& !TYPE_DOMAIN (itype
))
5335 TYPE_DOMAIN (itype
) = domain
;
5336 /* The type of the main variant should never be used for arrays
5337 of different sizes. It should only ever be completed with the
5338 size of the array. */
5339 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)))
5340 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type
)) = domain
;
5342 elt_type
= TREE_TYPE (type
);
5343 TYPE_NEEDS_CONSTRUCTING (type
)
5344 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type
));
5345 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
5346 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type
));
5349 /* Lay out the type now that we can get the real answer. */
5356 /* Return zero if something is declared to be a member of type
5357 CTYPE when in the context of CUR_TYPE. STRING is the error
5358 message to print in that case. Otherwise, quietly return 1. */
5361 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
5363 if (ctype
&& ctype
!= cur_type
)
5365 if (flags
== DTOR_FLAG
)
5366 error ("destructor for alien class `%T' cannot be a member",
5369 error ("constructor for alien class `%T' cannot be a member",
5376 /* Subroutine of `grokdeclarator'. */
5378 /* Generate errors possibly applicable for a given set of specifiers.
5379 This is for ARM $7.1.2. */
5382 bad_specifiers (tree object
,
5391 error ("`%D' declared as a `virtual' %s", object
, type
);
5393 error ("`%D' declared as an `inline' %s", object
, type
);
5395 error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
5398 cp_error_at ("`%D' declared as a friend", object
);
5400 && (TREE_CODE (object
) == TYPE_DECL
5401 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
5402 && !TYPE_REFFN_P (TREE_TYPE (object
))
5403 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
5404 cp_error_at ("`%D' declared with an exception specification", object
);
5407 /* CTYPE is class type, or null if non-class.
5408 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5410 DECLARATOR is the function's name.
5411 PARMS is a chain of PARM_DECLs for the function.
5412 VIRTUALP is truthvalue of whether the function is virtual or not.
5413 FLAGS are to be passed through to `grokclassfn'.
5414 QUALS are qualifiers indicating whether the function is `const'
5416 RAISES is a list of exceptions that this function can raise.
5417 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5418 not look, and -1 if we should not call `grokclassfn' at all.
5420 Returns `NULL_TREE' if something goes wrong, after issuing
5421 applicable error messages. */
5424 grokfndecl (tree ctype
,
5428 tree orig_declarator
,
5430 enum overload_flags flags
,
5442 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
5443 int has_default_arg
= 0;
5447 type
= build_exception_variant (type
, raises
);
5449 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
5450 DECL_ARGUMENTS (decl
) = parms
;
5451 /* Propagate volatile out from type to decl. */
5452 if (TYPE_VOLATILE (type
))
5453 TREE_THIS_VOLATILE (decl
) = 1;
5455 /* If this decl has namespace scope, set that up. */
5457 set_decl_namespace (decl
, in_namespace
, friendp
);
5459 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
5461 /* `main' and builtins have implicit 'C' linkage. */
5462 if ((MAIN_NAME_P (declarator
)
5463 || (IDENTIFIER_LENGTH (declarator
) > 10
5464 && IDENTIFIER_POINTER (declarator
)[0] == '_'
5465 && IDENTIFIER_POINTER (declarator
)[1] == '_'
5466 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
5467 && current_lang_name
== lang_name_cplusplus
5468 && ctype
== NULL_TREE
5469 /* NULL_TREE means global namespace. */
5470 && DECL_CONTEXT (decl
) == NULL_TREE
)
5471 SET_DECL_LANGUAGE (decl
, lang_c
);
5473 /* Should probably propagate const out from type to decl I bet (mrs). */
5476 DECL_STATIC_FUNCTION_P (decl
) = 1;
5477 DECL_CONTEXT (decl
) = ctype
;
5481 DECL_CONTEXT (decl
) = ctype
;
5483 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
5485 if (processing_template_decl
)
5486 error ("cannot declare `::main' to be a template");
5488 error ("cannot declare `::main' to be inline");
5490 error ("cannot declare `::main' to be static");
5491 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
5493 error ("`main' must return `int'");
5498 /* Members of anonymous types and local classes have no linkage; make
5499 them internal. If a typedef is made later, this will be changed. */
5500 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
5501 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
5506 /* [basic.link]: A name with no linkage (notably, the name of a class
5507 or enumeration declared in a local scope) shall not be used to
5508 declare an entity with linkage.
5510 Only check this for public decls for now. See core 319, 389. */
5511 t
= no_linkage_check (TREE_TYPE (decl
));
5514 if (TYPE_ANONYMOUS_P (t
))
5516 if (DECL_EXTERN_C_P (decl
))
5517 /* Allow this; it's pretty common in C. */;
5520 pedwarn ("non-local function `%#D' uses anonymous type",
5522 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
5524 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5529 pedwarn ("non-local function `%#D' uses local type `%T'",
5534 TREE_PUBLIC (decl
) = publicp
;
5537 DECL_INTERFACE_KNOWN (decl
) = 1;
5538 DECL_NOT_REALLY_EXTERN (decl
) = 1;
5541 /* If the declaration was declared inline, mark it as such. */
5543 DECL_DECLARED_INLINE_P (decl
) = 1;
5544 /* We inline functions that are explicitly declared inline, or, when
5545 the user explicitly asks us to, all functions. */
5546 if (DECL_DECLARED_INLINE_P (decl
)
5547 || (flag_inline_trees
== 2 && !DECL_INLINE (decl
) && funcdef_flag
))
5548 DECL_INLINE (decl
) = 1;
5550 DECL_EXTERNAL (decl
) = 1;
5551 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
5553 error ("%smember function `%D' cannot have cv-qualifier",
5554 (ctype
? "static " : "non-"), decl
);
5555 quals
= TYPE_UNQUALIFIED
;
5558 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
)))
5559 grok_op_properties (decl
, friendp
, /*complain=*/true);
5561 if (ctype
&& decl_function_context (decl
))
5562 DECL_NO_STATIC_CHAIN (decl
) = 1;
5564 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
5565 if (TREE_PURPOSE (t
)
5566 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
5568 has_default_arg
= 1;
5573 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
5577 ("defining explicit specialization `%D' in friend declaration",
5581 tree fns
= TREE_OPERAND (orig_declarator
, 0);
5582 tree args
= TREE_OPERAND (orig_declarator
, 1);
5584 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5586 /* Something like `template <class T> friend void f<T>()'. */
5587 error ("invalid use of template-id `%D' in declaration of primary template",
5593 /* A friend declaration of the form friend void f<>(). Record
5594 the information in the TEMPLATE_ID_EXPR. */
5595 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
5597 if (TREE_CODE (fns
) == COMPONENT_REF
)
5599 /* Due to bison parser ickiness, we will have already looked
5600 up an operator_name or PFUNCNAME within the current class
5601 (see template_id in parse.y). If the current class contains
5602 such a name, we'll get a COMPONENT_REF here. Undo that. */
5604 my_friendly_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
5605 == current_class_type
, 20001120);
5606 fns
= TREE_OPERAND (fns
, 1);
5608 my_friendly_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
5609 || TREE_CODE (fns
) == OVERLOAD
, 20001120);
5610 DECL_TEMPLATE_INFO (decl
) = tree_cons (fns
, args
, NULL_TREE
);
5612 if (has_default_arg
)
5614 error ("default arguments are not allowed in declaration of friend template specialization `%D'",
5621 error ("`inline' is not allowed in declaration of friend template specialization `%D'",
5629 /* Make the init_value nonzero so pushdecl knows this is not
5630 tentative. error_mark_node is replaced later with the BLOCK. */
5631 DECL_INITIAL (decl
) = error_mark_node
;
5633 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
5634 TREE_NOTHROW (decl
) = 1;
5636 /* Caller will do the rest of this. */
5640 if (flags
== NO_SPECIAL
&& ctype
&& constructor_name_p (declarator
, ctype
))
5641 DECL_CONSTRUCTOR_P (decl
) = 1;
5643 /* Function gets the ugly name, field gets the nice one. This call
5644 may change the type of the function (because of default
5646 if (ctype
!= NULL_TREE
)
5647 grokclassfn (ctype
, decl
, flags
, quals
);
5649 decl
= check_explicit_specialization (orig_declarator
, decl
,
5651 2 * (funcdef_flag
!= 0) +
5652 4 * (friendp
!= 0));
5653 if (decl
== error_mark_node
)
5656 if (ctype
!= NULL_TREE
5657 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
5662 old_decl
= check_classfn (ctype
, decl
,
5663 (processing_template_decl
5664 > template_class_depth (ctype
))
5665 ? current_template_parms
5668 if (old_decl
&& TREE_CODE (old_decl
) == TEMPLATE_DECL
)
5669 /* Because grokfndecl is always supposed to return a
5670 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5671 here. We depend on our callers to figure out that its
5672 really a template that's being returned. */
5673 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
5675 if (old_decl
&& DECL_STATIC_FUNCTION_P (old_decl
)
5676 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
5677 /* Remove the `this' parm added by grokclassfn.
5678 XXX Isn't this done in start_function, too? */
5679 revert_static_member_fn (decl
);
5680 if (old_decl
&& DECL_ARTIFICIAL (old_decl
))
5681 error ("definition of implicitly-declared `%D'", old_decl
);
5688 /* Since we've smashed OLD_DECL to its
5689 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5690 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
5691 decl
= DECL_TEMPLATE_RESULT (decl
);
5693 /* Attempt to merge the declarations. This can fail, in
5694 the case of some invalid specialization declarations. */
5695 pop_p
= push_scope (ctype
);
5696 ok
= duplicate_decls (decl
, old_decl
);
5701 error ("no `%#D' member function declared in class `%T'",
5709 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
5712 if (ctype
== NULL_TREE
|| check
)
5716 DECL_VIRTUAL_P (decl
) = 1;
5721 /* Create a VAR_DECL named NAME with the indicated TYPE.
5723 If SCOPE is non-NULL, it is the class type or namespace containing
5724 the variable. If SCOPE is NULL, the variable should is created in
5725 the innermost enclosings scope. */
5728 grokvardecl (tree type
,
5730 cp_decl_specifier_seq
*declspecs
,
5737 my_friendly_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
,
5740 /* Compute the scope in which to place the variable. */
5743 /* An explicit "extern" specifier indicates a namespace-scope
5745 if (declspecs
->storage_class
== sc_extern
)
5746 scope
= current_namespace
;
5747 else if (!at_function_scope_p ())
5749 scope
= current_scope ();
5751 scope
= current_namespace
;
5756 && (/* If the variable is a namespace-scope variable declared in a
5757 template, we need DECL_LANG_SPECIFIC. */
5758 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
5759 /* Similarly for namespace-scope variables with language linkage
5761 || (TREE_CODE (scope
) == NAMESPACE_DECL
5762 && current_lang_name
!= lang_name_cplusplus
)
5763 /* Similarly for static data members. */
5765 decl
= build_lang_decl (VAR_DECL
, name
, type
);
5767 decl
= build_decl (VAR_DECL
, name
, type
);
5769 if (scope
&& TREE_CODE (scope
) == NAMESPACE_DECL
)
5770 set_decl_namespace (decl
, scope
, 0);
5772 DECL_CONTEXT (decl
) = scope
;
5774 if (declspecs
->storage_class
== sc_extern
)
5776 DECL_THIS_EXTERN (decl
) = 1;
5777 DECL_EXTERNAL (decl
) = !initialized
;
5780 /* In class context, static means one per class,
5781 public access, and static storage. */
5782 if (DECL_CLASS_SCOPE_P (decl
))
5784 TREE_PUBLIC (decl
) = 1;
5785 TREE_STATIC (decl
) = 1;
5786 DECL_EXTERNAL (decl
) = 0;
5788 /* At top level, either `static' or no s.c. makes a definition
5789 (perhaps tentative), and absence of `static' makes it public. */
5790 else if (toplevel_bindings_p ())
5792 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
5793 && (DECL_THIS_EXTERN (decl
) || ! constp
));
5794 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
5796 /* Not at top level, only `static' makes a static definition. */
5799 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
5800 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
5803 if (declspecs
->specs
[(int)ds_thread
])
5805 if (targetm
.have_tls
)
5806 DECL_THREAD_LOCAL (decl
) = 1;
5808 /* A mere warning is sure to result in improper semantics
5809 at runtime. Don't bother to allow this to compile. */
5810 error ("thread-local storage not supported for this target");
5813 if (TREE_PUBLIC (decl
))
5815 /* [basic.link]: A name with no linkage (notably, the name of a class
5816 or enumeration declared in a local scope) shall not be used to
5817 declare an entity with linkage.
5819 Only check this for public decls for now. */
5820 tree t
= no_linkage_check (TREE_TYPE (decl
));
5823 if (TYPE_ANONYMOUS_P (t
))
5825 if (DECL_EXTERN_C_P (decl
))
5826 /* Allow this; it's pretty common in C. */;
5829 pedwarn ("non-local variable `%#D' uses anonymous type",
5831 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
5833 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5838 pedwarn ("non-local variable `%#D' uses local type `%T'",
5846 /* Create and return a canonical pointer to member function type, for
5847 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
5850 build_ptrmemfunc_type (tree type
)
5854 tree unqualified_variant
= NULL_TREE
;
5856 if (type
== error_mark_node
)
5859 /* If a canonical type already exists for this type, use it. We use
5860 this method instead of type_hash_canon, because it only does a
5861 simple equality check on the list of field members. */
5863 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
5866 /* Make sure that we always have the unqualified pointer-to-member
5868 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
5870 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
5872 t
= make_aggr_type (RECORD_TYPE
);
5873 /* Let the front-end know this is a pointer to member function... */
5874 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
5875 /* ... and not really an aggregate. */
5876 SET_IS_AGGR_TYPE (t
, 0);
5878 field
= build_decl (FIELD_DECL
, pfn_identifier
, type
);
5881 field
= build_decl (FIELD_DECL
, delta_identifier
, delta_type_node
);
5882 TREE_CHAIN (field
) = fields
;
5885 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
5887 /* Zap out the name so that the back-end will give us the debugging
5888 information for this anonymous RECORD_TYPE. */
5889 TYPE_NAME (t
) = NULL_TREE
;
5891 /* If this is not the unqualified form of this pointer-to-member
5892 type, set the TYPE_MAIN_VARIANT for this type to be the
5893 unqualified type. Since they are actually RECORD_TYPEs that are
5894 not variants of each other, we must do this manually. */
5895 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
5897 t
= build_qualified_type (t
, cp_type_quals (type
));
5898 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
5899 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
5900 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
5903 /* Cache this pointer-to-member type so that we can find it again
5905 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
5910 /* Create and return a pointer to data member type. */
5913 build_ptrmem_type (tree class_type
, tree member_type
)
5915 if (TREE_CODE (member_type
) == METHOD_TYPE
)
5919 arg_types
= TYPE_ARG_TYPES (member_type
);
5920 class_type
= (cp_build_qualified_type
5922 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types
)))));
5924 = build_method_type_directly (class_type
,
5925 TREE_TYPE (member_type
),
5926 TREE_CHAIN (arg_types
));
5927 return build_ptrmemfunc_type (build_pointer_type (member_type
));
5931 my_friendly_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
,
5933 return build_offset_type (class_type
, member_type
);
5937 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
5938 Check to see that the definition is valid. Issue appropriate error
5939 messages. Return 1 if the definition is particularly bad, or 0
5943 check_static_variable_definition (tree decl
, tree type
)
5945 /* Motion 10 at San Diego: If a static const integral data member is
5946 initialized with an integral constant expression, the initializer
5947 may appear either in the declaration (within the class), or in
5948 the definition, but not both. If it appears in the class, the
5949 member is a member constant. The file-scope definition is always
5951 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
5953 error ("invalid in-class initialization of static data member of non-integral type `%T'",
5955 /* If we just return the declaration, crashes will sometimes
5956 occur. We therefore return void_type_node, as if this were a
5957 friend declaration, to cause callers to completely ignore
5958 this declaration. */
5961 else if (!CP_TYPE_CONST_P (type
))
5962 error ("ISO C++ forbids in-class initialization of non-const static member `%D'",
5964 else if (pedantic
&& !INTEGRAL_TYPE_P (type
))
5965 pedwarn ("ISO C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl
, type
);
5970 /* Given the SIZE (i.e., number of elements) in an array, compute an
5971 appropriate index type for the array. If non-NULL, NAME is the
5972 name of the thing being declared. */
5975 compute_array_index_type (tree name
, tree size
)
5977 tree type
= TREE_TYPE (size
);
5980 /* The array bound must be an integer type. */
5981 if (!dependent_type_p (type
) && !INTEGRAL_TYPE_P (type
))
5984 error ("size of array `%D' has non-integral type `%T'", name
, type
);
5986 error ("size of array has non-integral type `%T'", type
);
5987 size
= integer_one_node
;
5988 type
= TREE_TYPE (size
);
5991 if (abi_version_at_least (2)
5992 /* We should only handle value dependent expressions specially. */
5993 ? value_dependent_expression_p (size
)
5994 /* But for abi-1, we handled all instances in templates. This
5995 effects the manglings produced. */
5996 : processing_template_decl
)
5997 return build_index_type (build_min (MINUS_EXPR
, sizetype
,
5998 size
, integer_one_node
));
6000 /* The size might be the result of a cast. */
6001 STRIP_TYPE_NOPS (size
);
6003 /* It might be a const variable or enumeration constant. */
6004 size
= decl_constant_value (size
);
6006 /* Normally, the array-bound will be a constant. */
6007 if (TREE_CODE (size
) == INTEGER_CST
)
6009 /* Check to see if the array bound overflowed. Make that an
6010 error, no matter how generous we're being. */
6011 int old_flag_pedantic_errors
= flag_pedantic_errors
;
6012 int old_pedantic
= pedantic
;
6013 pedantic
= flag_pedantic_errors
= 1;
6014 constant_expression_warning (size
);
6015 pedantic
= old_pedantic
;
6016 flag_pedantic_errors
= old_flag_pedantic_errors
;
6018 /* An array must have a positive number of elements. */
6019 if (INT_CST_LT (size
, integer_zero_node
))
6022 error ("size of array `%D' is negative", name
);
6024 error ("size of array is negative");
6025 size
= integer_one_node
;
6027 /* As an extension we allow zero-sized arrays. We always allow
6028 them in system headers because glibc uses them. */
6029 else if (integer_zerop (size
) && pedantic
&& !in_system_header
)
6032 pedwarn ("ISO C++ forbids zero-size array `%D'", name
);
6034 pedwarn ("ISO C++ forbids zero-size array");
6037 else if (TREE_CONSTANT (size
))
6039 /* `(int) &fn' is not a valid array bound. */
6041 error ("size of array `%D' is not an integral constant-expression",
6044 error ("size of array is not an integral constant-expression");
6049 pedwarn ("ISO C++ forbids variable-size array `%D'", name
);
6051 pedwarn ("ISO C++ forbids variable-size array");
6054 if (processing_template_decl
&& !TREE_CONSTANT (size
))
6055 /* A variable sized array. */
6056 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
6059 /* Compute the index of the largest element in the array. It is
6060 one less than the number of elements in the array. */
6062 = fold (cp_build_binary_op (MINUS_EXPR
,
6063 cp_convert (ssizetype
, size
),
6064 cp_convert (ssizetype
, integer_one_node
)));
6065 if (!TREE_CONSTANT (itype
))
6066 /* A variable sized array. */
6067 itype
= variable_size (itype
);
6068 /* Make sure that there was no overflow when creating to a signed
6069 index type. (For example, on a 32-bit machine, an array with
6070 size 2^32 - 1 is too big.) */
6071 else if (TREE_OVERFLOW (itype
))
6073 error ("overflow in array dimension");
6074 TREE_OVERFLOW (itype
) = 0;
6078 /* Create and return the appropriate index type. */
6079 return build_index_type (itype
);
6082 /* Returns the scope (if any) in which the entity declared by
6083 DECLARATOR will be located. If the entity was declared with an
6084 unqualified name, NULL_TREE is returned. */
6087 get_scope_of_declarator (const cp_declarator
*declarator
)
6089 while (declarator
&& declarator
->kind
!= cdk_id
)
6090 declarator
= declarator
->declarator
;
6092 /* If the declarator-id is a SCOPE_REF, the scope in which the
6093 declaration occurs is the first operand. */
6095 && declarator
->u
.id
.name
6096 && TREE_CODE (declarator
->u
.id
.name
) == SCOPE_REF
)
6097 return TREE_OPERAND (declarator
->u
.id
.name
, 0);
6099 /* Otherwise, the declarator is not a quablified name; the entity will
6100 be declared in the current scope. */
6104 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6105 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6109 create_array_type_for_decl (tree name
, tree type
, tree size
)
6111 tree itype
= NULL_TREE
;
6112 const char* error_msg
;
6114 /* If things have already gone awry, bail now. */
6115 if (type
== error_mark_node
|| size
== error_mark_node
)
6116 return error_mark_node
;
6118 /* Assume that everything will go OK. */
6121 /* There are some types which cannot be array elements. */
6122 switch (TREE_CODE (type
))
6125 error_msg
= "array of void";
6129 error_msg
= "array of functions";
6132 case REFERENCE_TYPE
:
6133 error_msg
= "array of references";
6137 error_msg
= "array of function members";
6144 /* If something went wrong, issue an error-message and return. */
6148 error ("declaration of `%D' as %s", name
, error_msg
);
6150 error ("creating %s", error_msg
);
6152 return error_mark_node
;
6157 The constant expressions that specify the bounds of the arrays
6158 can be omitted only for the first member of the sequence. */
6159 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
6162 error ("declaration of `%D' as multidimensional array must have bounds for all dimensions except the first",
6165 error ("multidimensional array must have bounds for all dimensions except the first");
6167 return error_mark_node
;
6170 /* Figure out the index type for the array. */
6172 itype
= compute_array_index_type (name
, size
);
6174 return build_cplus_array_type (type
, itype
);
6177 /* Check that it's OK to declare a function with the indicated TYPE.
6178 SFK indicates the kind of special function (if any) that this
6179 function is. OPTYPE is the type given in a conversion operator
6180 declaration. Returns the actual return type of the function; that
6181 may be different than TYPE if an error occurs, or for certain
6182 special functions. */
6185 check_special_function_return_type (special_function_kind sfk
,
6191 case sfk_constructor
:
6193 error ("return type specification for constructor invalid");
6195 type
= void_type_node
;
6198 case sfk_destructor
:
6200 error ("return type specification for destructor invalid");
6201 type
= void_type_node
;
6204 case sfk_conversion
:
6205 if (type
&& !same_type_p (type
, optype
))
6206 error ("operator `%T' declared to return `%T'", optype
, type
);
6208 pedwarn ("return type specified for `operator %T'", optype
);
6220 /* Given declspecs and a declarator (abstract or otherwise), determine
6221 the name and type of the object declared and construct a DECL node
6224 DECLSPECS is a chain of tree_list nodes whose value fields
6225 are the storage classes and type specifiers.
6227 DECL_CONTEXT says which syntactic context this declaration is in:
6228 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6229 FUNCDEF for a function definition. Like NORMAL but a few different
6230 error messages in each case. Return value may be zero meaning
6231 this definition is too screwy to try to parse.
6232 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6233 handle member functions (which have FIELD context).
6234 Return value may be zero meaning this definition is too screwy to
6236 PARM for a parameter declaration (either within a function prototype
6237 or before a function body). Make a PARM_DECL, or return void_type_node.
6238 CATCHPARM for a parameter declaration before a catch clause.
6239 TYPENAME if for a typename (in a cast or sizeof).
6240 Don't make a DECL node; just return the ..._TYPE node.
6241 FIELD for a struct or union field; make a FIELD_DECL.
6242 BITFIELD for a field with specified width.
6243 INITIALIZED is 1 if the decl has an initializer.
6245 ATTRLIST is a pointer to the list of attributes, which may be NULL
6246 if there are none; *ATTRLIST may be modified if attributes from inside
6247 the declarator should be applied to the declaration.
6249 When this function is called, scoping variables (such as
6250 CURRENT_CLASS_TYPE) should reflect the scope in which the
6251 declaration occurs, not the scope in which the new declaration will
6252 be placed. For example, on:
6256 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6257 should not be `S'. */
6260 grokdeclarator (const cp_declarator
*declarator
,
6261 cp_decl_specifier_seq
*declspecs
,
6262 enum decl_context decl_context
,
6266 tree type
= NULL_TREE
;
6269 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
6270 int explicit_int
= 0;
6271 int explicit_char
= 0;
6272 int defaulted_int
= 0;
6273 tree dependant_name
= NULL_TREE
;
6275 tree typedef_decl
= NULL_TREE
;
6276 const char *name
= NULL
;
6277 tree typedef_type
= NULL_TREE
;
6278 int funcdef_flag
= 0;
6279 cp_declarator_kind innermost_code
= cdk_error
;
6282 /* See the code below that used this. */
6283 tree decl_attr
= NULL_TREE
;
6286 /* Keep track of what sort of function is being processed
6287 so that we can warn about default return values, or explicit
6288 return values which do not match prescribed defaults. */
6289 special_function_kind sfk
= sfk_none
;
6291 tree dname
= NULL_TREE
;
6292 tree ctor_return_type
= NULL_TREE
;
6293 enum overload_flags flags
= NO_SPECIAL
;
6294 cp_cv_quals quals
= TYPE_UNQUALIFIED
;
6295 tree raises
= NULL_TREE
;
6296 int template_count
= 0;
6297 tree returned_attrs
= NULL_TREE
;
6298 tree parms
= NULL_TREE
;
6299 const cp_declarator
*id_declarator
;
6300 /* The unqualified name of the declarator; either an
6301 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6302 tree unqualified_id
;
6303 /* The class type, if any, in which this entity is located,
6304 or NULL_TREE if none. Note that this value may be different from
6305 the current class type; for example if an attempt is made to declare
6306 "A::f" inside "B", this value will be "A". */
6307 tree ctype
= current_class_type
;
6308 /* The NAMESPACE_DECL for the namespace in which this entity is
6309 located. If an unqualified name is used to declare the entity,
6310 this value will be NULL_TREE, even if the entity is located at
6312 tree in_namespace
= NULL_TREE
;
6315 if (decl_context
== FUNCDEF
)
6316 funcdef_flag
= 1, decl_context
= NORMAL
;
6317 else if (decl_context
== MEMFUNCDEF
)
6318 funcdef_flag
= -1, decl_context
= FIELD
;
6319 else if (decl_context
== BITFIELD
)
6320 bitfield
= 1, decl_context
= FIELD
;
6322 /* Look inside a declarator for the name being declared
6323 and get it as a string, for an error message. */
6324 for (id_declarator
= declarator
;
6326 id_declarator
= id_declarator
->declarator
)
6328 if (id_declarator
->kind
!= cdk_id
)
6329 innermost_code
= id_declarator
->kind
;
6331 switch (id_declarator
->kind
)
6334 if (id_declarator
->declarator
6335 && id_declarator
->declarator
->kind
== cdk_id
)
6337 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
6338 if (sfk
== sfk_destructor
)
6345 tree decl
= id_declarator
->u
.id
.name
;
6348 if (TREE_CODE (decl
) == SCOPE_REF
)
6350 tree qualifying_scope
= TREE_OPERAND (decl
, 0);
6352 /* It is valid to write:
6354 class C { void f(); };
6358 The standard is not clear about whether `typedef const C D' is
6359 legal; as of 2002-09-15 the committee is considering
6360 that question. EDG 3.0 allows that syntax.
6361 Therefore, we do as well. */
6362 if (qualifying_scope
&& TYPE_P (qualifying_scope
))
6364 ctype
= TYPE_MAIN_VARIANT (qualifying_scope
);
6365 if (innermost_code
!= cdk_function
6366 && current_class_type
6367 && !UNIQUELY_DERIVED_FROM_P (ctype
,
6368 current_class_type
))
6370 error ("type `%T' is not derived from type `%T'",
6371 ctype
, current_class_type
);
6374 TREE_OPERAND (decl
, 0) = ctype
;
6376 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
6377 in_namespace
= qualifying_scope
;
6378 decl
= TREE_OPERAND (decl
, 1);
6380 if (TREE_CODE (decl
) == BASELINK
)
6381 decl
= BASELINK_FUNCTIONS (decl
);
6382 if (decl
== error_mark_node
)
6383 return error_mark_node
;
6384 switch (TREE_CODE (decl
))
6388 tree type
= TREE_OPERAND (decl
, 0);
6389 type
= constructor_name (type
);
6390 name
= IDENTIFIER_POINTER (type
);
6394 case TEMPLATE_ID_EXPR
:
6396 tree fns
= TREE_OPERAND (decl
, 0);
6399 if (TREE_CODE (dname
) == COMPONENT_REF
)
6400 dname
= TREE_OPERAND (dname
, 1);
6401 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
6403 my_friendly_assert (is_overloaded_fn (dname
),
6405 dname
= DECL_NAME (get_first_fn (dname
));
6410 case IDENTIFIER_NODE
:
6411 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
6414 if (C_IS_RESERVED_WORD (dname
))
6416 error ("declarator-id missing; using reserved word `%D'",
6418 name
= IDENTIFIER_POINTER (dname
);
6420 else if (!IDENTIFIER_TYPENAME_P (dname
))
6421 name
= IDENTIFIER_POINTER (dname
);
6424 my_friendly_assert (flags
== NO_SPECIAL
, 154);
6425 flags
= TYPENAME_FLAG
;
6426 ctor_return_type
= TREE_TYPE (dname
);
6427 sfk
= sfk_conversion
;
6428 if (is_typename_at_global_scope (dname
))
6429 name
= IDENTIFIER_POINTER (dname
);
6431 name
= "<invalid operator>";
6436 dname
= constructor_name (TREE_TYPE (decl
));
6437 name
= IDENTIFIER_POINTER (dname
);
6458 if (id_declarator
->kind
== cdk_id
)
6462 /* A function definition's declarator must have the form of
6463 a function declarator. */
6465 if (funcdef_flag
&& innermost_code
!= cdk_function
)
6468 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
6469 && innermost_code
!= cdk_function
6470 && ! (ctype
&& !declspecs
->any_specifiers_p
))
6472 error ("declaration of `%D' as non-function", dname
);
6473 return void_type_node
;
6476 /* Anything declared one level down from the top level
6477 must be one of the parameters of a function
6478 (because the body is at least two levels down). */
6480 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6481 by not allowing C++ class definitions to specify their parameters
6482 with xdecls (must be spec.d in the parmlist).
6484 Since we now wait to push a class scope until we are sure that
6485 we are in a legitimate method context, we must set oldcname
6486 explicitly (since current_class_name is not yet alive).
6488 We also want to avoid calling this a PARM if it is in a namespace. */
6490 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
6492 struct cp_binding_level
*b
= current_binding_level
;
6493 current_binding_level
= b
->level_chain
;
6494 if (current_binding_level
!= 0 && toplevel_bindings_p ())
6495 decl_context
= PARM
;
6496 current_binding_level
= b
;
6500 name
= decl_context
== PARM
? "parameter" : "type name";
6502 /* If there were multiple types specified in the decl-specifier-seq,
6503 issue an error message. */
6504 if (declspecs
->multiple_types_p
)
6505 error ("two or more data types in declaration of `%s'", name
);
6506 /* Extract the basic type from the decl-specifier-seq. */
6507 type
= declspecs
->type
;
6508 if (type
== error_mark_node
)
6510 /* If the entire declaration is itself tagged as deprecated then
6511 suppress reports of deprecated items. */
6512 if (type
&& TREE_DEPRECATED (type
)
6513 && deprecated_state
!= DEPRECATED_SUPPRESS
)
6514 warn_deprecated_use (type
);
6515 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
6517 typedef_decl
= type
;
6518 type
= TREE_TYPE (typedef_decl
);
6520 /* No type at all: default to `int', and set DEFAULTED_INT
6521 because it was not a user-defined typedef. */
6522 if (type
== NULL_TREE
6523 && (declspecs
->specs
[(int)ds_signed
]
6524 || declspecs
->specs
[(int)ds_unsigned
]
6525 || declspecs
->specs
[(int)ds_long
]
6526 || declspecs
->specs
[(int)ds_short
]))
6528 /* These imply 'int'. */
6529 type
= integer_type_node
;
6533 explicit_int
= declspecs
->explicit_int_p
;
6534 explicit_char
= declspecs
->explicit_char_p
;
6536 /* Check for repeated decl-specifiers. */
6537 for (ds
= ds_first
; ds
!= ds_last
; ++ds
)
6539 unsigned count
= declspecs
->specs
[(int)ds
];
6542 /* The "long" specifier is a special case because of
6547 error ("`long long long' is too long for GCC");
6548 else if (pedantic
&& !in_system_header
&& warn_long_long
)
6549 pedwarn ("ISO C++ does not support `long long'");
6553 else if (declspecs
->specs
[(int)ds
] > 1)
6555 static const char *const decl_spec_names
[] = {
6571 error ("duplicate `%s'", decl_spec_names
[(int)ds
]);
6576 /* See the code below that used this. */
6578 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
6580 typedef_type
= type
;
6583 if (sfk
!= sfk_none
)
6584 type
= check_special_function_return_type (sfk
, type
,
6586 else if (type
== NULL_TREE
)
6592 /* We handle `main' specially here, because 'main () { }' is so
6593 common. With no options, it is allowed. With -Wreturn-type,
6594 it is a warning. It is only an error with -pedantic-errors. */
6595 is_main
= (funcdef_flag
6596 && dname
&& MAIN_NAME_P (dname
)
6597 && ctype
== NULL_TREE
6598 && in_namespace
== NULL_TREE
6599 && current_namespace
== global_namespace
);
6601 if (in_system_header
|| flag_ms_extensions
)
6602 /* Allow it, sigh. */;
6603 else if (pedantic
|| ! is_main
)
6604 pedwarn ("ISO C++ forbids declaration of `%s' with no type",
6606 else if (warn_return_type
)
6607 warning ("ISO C++ forbids declaration of `%s' with no type",
6610 type
= integer_type_node
;
6615 /* Now process the modifiers that were specified
6616 and check for invalid combinations. */
6618 /* Long double is a special combination. */
6619 if (declspecs
->specs
[(int)ds_long
]
6620 && TYPE_MAIN_VARIANT (type
) == double_type_node
)
6622 declspecs
->specs
[(int)ds_long
] = 0;
6623 type
= build_qualified_type (long_double_type_node
,
6624 cp_type_quals (type
));
6627 /* Check all other uses of type modifiers. */
6629 if (declspecs
->specs
[(int)ds_unsigned
]
6630 || declspecs
->specs
[(int)ds_signed
]
6631 || declspecs
->specs
[(int)ds_long
]
6632 || declspecs
->specs
[(int)ds_short
])
6636 if (TREE_CODE (type
) == REAL_TYPE
)
6637 error ("short, signed or unsigned invalid for `%s'", name
);
6638 else if (TREE_CODE (type
) != INTEGER_TYPE
)
6639 error ("long, short, signed or unsigned invalid for `%s'", name
);
6640 else if (declspecs
->specs
[(int)ds_long
]
6641 && declspecs
->specs
[(int)ds_short
])
6642 error ("long and short specified together for `%s'", name
);
6643 else if ((declspecs
->specs
[(int)ds_long
]
6644 || declspecs
->specs
[(int)ds_short
])
6646 error ("long or short specified with char for `%s'", name
);
6647 else if ((declspecs
->specs
[(int)ds_long
]
6648 || declspecs
->specs
[(int)ds_short
])
6649 && TREE_CODE (type
) == REAL_TYPE
)
6650 error ("long or short specified with floating type for `%s'", name
);
6651 else if (declspecs
->specs
[(int)ds_signed
]
6652 && declspecs
->specs
[(int)ds_unsigned
])
6653 error ("signed and unsigned given together for `%s'", name
);
6657 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& pedantic
)
6659 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
6661 if (flag_pedantic_errors
)
6666 /* Discard the type modifiers if they are invalid. */
6669 declspecs
->specs
[(int)ds_unsigned
] = 0;
6670 declspecs
->specs
[(int)ds_signed
] = 0;
6671 declspecs
->specs
[(int)ds_long
] = 0;
6672 declspecs
->specs
[(int)ds_short
] = 0;
6677 if (declspecs
->specs
[(int)ds_complex
]
6678 && TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
6680 error ("complex invalid for `%s'", name
);
6681 declspecs
->specs
[(int)ds_complex
] = 0;
6684 /* Decide whether an integer type is signed or not.
6685 Optionally treat bitfields as signed by default. */
6686 if (declspecs
->specs
[(int)ds_unsigned
]
6689 It is implementation-defined whether a plain (neither
6690 explicitly signed or unsigned) char, short, int, or long
6691 bit-field is signed or unsigned.
6693 Naturally, we extend this to long long as well. Note that
6694 this does not include wchar_t. */
6695 || (bitfield
&& !flag_signed_bitfields
6696 && !declspecs
->specs
[(int)ds_signed
]
6697 /* A typedef for plain `int' without `signed' can be
6698 controlled just like plain `int', but a typedef for
6699 `signed int' cannot be so controlled. */
6701 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
6702 && (TREE_CODE (type
) == INTEGER_TYPE
6703 || TREE_CODE (type
) == CHAR_TYPE
)
6704 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
6707 type
= long_long_unsigned_type_node
;
6708 else if (declspecs
->specs
[(int)ds_long
])
6709 type
= long_unsigned_type_node
;
6710 else if (declspecs
->specs
[(int)ds_short
])
6711 type
= short_unsigned_type_node
;
6712 else if (type
== char_type_node
)
6713 type
= unsigned_char_type_node
;
6714 else if (typedef_decl
)
6715 type
= c_common_unsigned_type (type
);
6717 type
= unsigned_type_node
;
6719 else if (declspecs
->specs
[(int)ds_signed
]
6720 && type
== char_type_node
)
6721 type
= signed_char_type_node
;
6723 type
= long_long_integer_type_node
;
6724 else if (declspecs
->specs
[(int)ds_long
])
6725 type
= long_integer_type_node
;
6726 else if (declspecs
->specs
[(int)ds_short
])
6727 type
= short_integer_type_node
;
6729 if (declspecs
->specs
[(int)ds_complex
])
6731 /* If we just have "complex", it is equivalent to
6732 "complex double", but if any modifiers at all are specified it is
6733 the complex form of TYPE. E.g, "complex short" is
6734 "complex short int". */
6736 if (defaulted_int
&& ! longlong
6737 && ! (declspecs
->specs
[(int)ds_long
]
6738 || declspecs
->specs
[(int)ds_short
]
6739 || declspecs
->specs
[(int)ds_signed
]
6740 || declspecs
->specs
[(int)ds_unsigned
]))
6741 type
= complex_double_type_node
;
6742 else if (type
== integer_type_node
)
6743 type
= complex_integer_type_node
;
6744 else if (type
== float_type_node
)
6745 type
= complex_float_type_node
;
6746 else if (type
== double_type_node
)
6747 type
= complex_double_type_node
;
6748 else if (type
== long_double_type_node
)
6749 type
= complex_long_double_type_node
;
6751 type
= build_complex_type (type
);
6754 type_quals
= TYPE_UNQUALIFIED
;
6755 if (declspecs
->specs
[(int)ds_const
])
6756 type_quals
|= TYPE_QUAL_CONST
;
6757 if (declspecs
->specs
[(int)ds_volatile
])
6758 type_quals
|= TYPE_QUAL_VOLATILE
;
6759 if (declspecs
->specs
[(int)ds_restrict
])
6760 type_quals
|= TYPE_QUAL_RESTRICT
;
6761 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
6762 error ("qualifiers are not allowed on declaration of `operator %T'",
6765 type_quals
|= cp_type_quals (type
);
6766 type
= cp_build_qualified_type_real
6767 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
6768 ? tf_ignore_bad_quals
: 0) | tf_error
| tf_warning
));
6769 /* We might have ignored or rejected some of the qualifiers. */
6770 type_quals
= cp_type_quals (type
);
6773 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
6774 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
6775 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
6777 if (declspecs
->storage_class
== sc_static
)
6778 staticp
= 1 + (decl_context
== FIELD
);
6780 if (virtualp
&& staticp
== 2)
6782 error ("member `%D' cannot be declared both virtual and static",
6786 friendp
= !! declspecs
->specs
[(int)ds_friend
];
6788 if (dependant_name
&& !friendp
)
6790 error ("`%T::%D' is not a valid declarator", ctype
, dependant_name
);
6791 return void_type_node
;
6794 /* Issue errors about use of storage classes for parameters. */
6795 if (decl_context
== PARM
)
6797 if (declspecs
->specs
[(int)ds_typedef
])
6798 error ("typedef declaration invalid in parameter declaration");
6799 else if (declspecs
->storage_class
== sc_static
6800 || declspecs
->storage_class
== sc_extern
6801 || declspecs
->specs
[(int)ds_thread
])
6802 error ("storage class specifiers invalid in parameter declarations");
6805 /* Give error if `virtual' is used outside of class declaration. */
6807 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
6809 error ("virtual outside class declaration");
6813 /* Static anonymous unions are dealt with here. */
6814 if (staticp
&& decl_context
== TYPENAME
6816 && ANON_AGGR_TYPE_P (declspecs
->type
))
6817 decl_context
= FIELD
;
6819 /* Warn about storage classes that are invalid for certain
6820 kinds of declarations (parameters, typenames, etc.). */
6821 if (declspecs
->multiple_storage_classes_p
)
6822 error ("multiple storage classes in declaration of `%s'", name
);
6823 else if (declspecs
->specs
[(int)ds_thread
]
6824 && ((declspecs
->storage_class
6825 && declspecs
->storage_class
!= sc_extern
6826 && declspecs
->storage_class
!= sc_static
)
6827 || declspecs
->specs
[(int)ds_typedef
]))
6829 error ("multiple storage classes in declaration of `%s'", name
);
6830 declspecs
->specs
[(int)ds_thread
] = 0;
6832 else if (decl_context
!= NORMAL
6833 && ((declspecs
->storage_class
!= sc_none
6834 && declspecs
->storage_class
!= sc_mutable
)
6835 || declspecs
->specs
[(int)ds_thread
]))
6837 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
6838 && (declspecs
->storage_class
== sc_register
6839 || declspecs
->storage_class
== sc_auto
))
6841 else if (declspecs
->specs
[(int)ds_typedef
])
6843 else if (decl_context
== FIELD
6844 /* C++ allows static class elements. */
6845 && declspecs
->storage_class
== sc_static
)
6846 /* C++ also allows inlines and signed and unsigned elements,
6847 but in those cases we don't come in here. */
6851 if (decl_context
== FIELD
)
6853 tree tmp
= NULL_TREE
;
6858 /* Avoid trying to get an operand off an identifier node. */
6859 if (declarator
->kind
!= cdk_id
)
6860 tmp
= declarator
->declarator
->u
.id
.name
;
6862 tmp
= declarator
->u
.id
.name
;
6863 op
= IDENTIFIER_OPNAME_P (tmp
);
6864 if (IDENTIFIER_TYPENAME_P (tmp
))
6866 if (is_typename_at_global_scope (tmp
))
6867 name
= IDENTIFIER_POINTER (tmp
);
6869 name
= "<invalid operator>";
6872 error ("storage class specified for %s `%s'",
6873 op
? "member operator" : "field",
6878 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
6879 error ("storage class specified for parameter `%s'", name
);
6881 error ("storage class specified for typename");
6883 if (declspecs
->storage_class
== sc_register
6884 || declspecs
->storage_class
== sc_auto
6885 || declspecs
->storage_class
== sc_extern
6886 || declspecs
->specs
[(int)ds_thread
])
6887 declspecs
->storage_class
= sc_none
;
6890 else if (declspecs
->storage_class
== sc_extern
&& initialized
6893 if (toplevel_bindings_p ())
6895 /* It's common practice (and completely valid) to have a const
6896 be initialized and declared extern. */
6897 if (!(type_quals
& TYPE_QUAL_CONST
))
6898 warning ("`%s' initialized and declared `extern'", name
);
6901 error ("`%s' has both `extern' and initializer", name
);
6903 else if (declspecs
->storage_class
== sc_extern
&& funcdef_flag
6904 && ! toplevel_bindings_p ())
6905 error ("nested function `%s' declared `extern'", name
);
6906 else if (toplevel_bindings_p ())
6908 if (declspecs
->storage_class
== sc_auto
)
6909 error ("top-level declaration of `%s' specifies `auto'", name
);
6911 else if (declspecs
->specs
[(int)ds_thread
]
6912 && declspecs
->storage_class
!= sc_extern
6913 && declspecs
->storage_class
!= sc_static
)
6915 error ("function-scope `%s' implicitly auto and declared `__thread'",
6917 declspecs
->specs
[(int)ds_thread
] = 0;
6920 if (declspecs
->storage_class
&& friendp
)
6921 error ("storage class specifiers invalid in friend function declarations");
6924 unqualified_id
= NULL_TREE
;
6927 unqualified_id
= id_declarator
->u
.id
.name
;
6928 if (TREE_CODE (unqualified_id
) == SCOPE_REF
)
6929 unqualified_id
= TREE_OPERAND (unqualified_id
, 1);
6930 if (TREE_CODE (unqualified_id
) == BASELINK
)
6931 unqualified_id
= BASELINK_FUNCTIONS (unqualified_id
);
6932 switch (TREE_CODE (unqualified_id
))
6936 = constructor_name (TREE_OPERAND (unqualified_id
, 0));
6941 = constructor_name (TREE_TYPE (unqualified_id
));
6944 case IDENTIFIER_NODE
:
6945 case TEMPLATE_ID_EXPR
:
6953 /* Determine the type of the entity declared by recurring on the
6956 declarator
&& declarator
->kind
!= cdk_id
;
6957 declarator
= declarator
->declarator
)
6959 const cp_declarator
*inner_declarator
;
6962 if (type
== error_mark_node
)
6963 return error_mark_node
;
6965 inner_declarator
= declarator
->declarator
;
6967 attrs
= declarator
->attributes
;
6973 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
6974 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
6975 if (declarator
->kind
== cdk_function
)
6976 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
6977 if (declarator
->kind
== cdk_array
)
6978 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
6979 returned_attrs
= decl_attributes (&type
,
6980 chainon (returned_attrs
, attrs
),
6984 switch (declarator
->kind
)
6987 type
= create_array_type_for_decl (dname
, type
,
6988 declarator
->u
.array
.bounds
);
6989 if (inner_declarator
6990 && (inner_declarator
->kind
== cdk_pointer
6991 || inner_declarator
->kind
== cdk_reference
6992 || inner_declarator
->kind
== cdk_ptrmem
))
6993 /* We can never complete an array type which is the
6994 target of a pointer, so go ahead and lay it out. */
7003 /* Declaring a function type.
7004 Make sure we have a valid type for the function to return. */
7006 /* We now know that the TYPE_QUALS don't apply to the
7007 decl, but to its return type. */
7008 type_quals
= TYPE_UNQUALIFIED
;
7010 /* Warn about some types functions can't return. */
7012 if (TREE_CODE (type
) == FUNCTION_TYPE
)
7014 error ("`%s' declared as function returning a function", name
);
7015 type
= integer_type_node
;
7017 if (TREE_CODE (type
) == ARRAY_TYPE
)
7019 error ("`%s' declared as function returning an array", name
);
7020 type
= integer_type_node
;
7023 /* Pick up type qualifiers which should be applied to `this'. */
7024 quals
= declarator
->u
.function
.qualifiers
;
7026 /* Pick up the exception specifications. */
7027 raises
= declarator
->u
.function
.exception_specification
;
7029 /* Say it's a definition only for the CALL_EXPR
7030 closest to the identifier. */
7031 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
7033 if (ctype
== NULL_TREE
7034 && decl_context
== FIELD
7036 && (friendp
== 0 || dname
== current_class_name
))
7037 ctype
= current_class_type
;
7039 if (ctype
&& sfk
== sfk_conversion
)
7040 TYPE_HAS_CONVERSION (ctype
) = 1;
7041 if (ctype
&& (sfk
== sfk_constructor
7042 || sfk
== sfk_destructor
))
7044 /* We are within a class's scope. If our declarator name
7045 is the same as the class name, and we are defining
7046 a function, then it is a constructor/destructor, and
7047 therefore returns a void type. */
7049 if (flags
== DTOR_FLAG
)
7051 /* ISO C++ 12.4/2. A destructor may not be
7052 declared const or volatile. A destructor may
7055 error ("destructor cannot be static member function");
7058 error ("destructors may not be cv-qualified");
7059 quals
= TYPE_UNQUALIFIED
;
7061 if (decl_context
== FIELD
)
7063 if (! member_function_or_else (ctype
,
7066 return void_type_node
;
7069 else /* It's a constructor. */
7073 /* ISO C++ 12.1. A constructor may not be
7074 declared const or volatile. A constructor may
7075 not be virtual. A constructor may not be
7078 error ("constructor cannot be static member function");
7081 pedwarn ("constructors cannot be declared virtual");
7086 error ("constructors may not be cv-qualified");
7087 quals
= TYPE_UNQUALIFIED
;
7089 if (decl_context
== FIELD
)
7091 if (! member_function_or_else (ctype
,
7094 return void_type_node
;
7095 TYPE_HAS_CONSTRUCTOR (ctype
) = 1;
7096 if (sfk
!= sfk_constructor
)
7100 if (decl_context
== FIELD
)
7106 error ("can't initialize friend function `%s'", name
);
7109 /* Cannot be both friend and virtual. */
7110 error ("virtual functions cannot be friends");
7113 if (decl_context
== NORMAL
)
7114 error ("friend declaration not in class definition");
7115 if (current_function_decl
&& funcdef_flag
)
7116 error ("can't define friend function `%s' in a local class definition",
7120 arg_types
= grokparms (declarator
->u
.function
.parameters
,
7123 if (inner_declarator
7124 && inner_declarator
->kind
== cdk_id
7125 && inner_declarator
->u
.id
.sfk
== sfk_destructor
7126 && arg_types
!= void_list_node
)
7128 error ("destructors may not have parameters");
7129 arg_types
= void_list_node
;
7133 type
= build_function_type (type
, arg_types
);
7140 /* Filter out pointers-to-references and references-to-references.
7141 We can get these if a TYPE_DECL is used. */
7143 if (TREE_CODE (type
) == REFERENCE_TYPE
)
7145 error (declarator
->kind
== cdk_reference
7146 ? "cannot declare reference to `%#T'"
7147 : "cannot declare pointer to `%#T'", type
);
7148 type
= TREE_TYPE (type
);
7150 else if (VOID_TYPE_P (type
))
7152 if (declarator
->kind
== cdk_reference
)
7153 error ("cannot declare reference to `%#T'", type
);
7154 else if (declarator
->kind
== cdk_ptrmem
)
7155 error ("cannot declare pointer to `%#T' member", type
);
7158 /* We now know that the TYPE_QUALS don't apply to the decl,
7159 but to the target of the pointer. */
7160 type_quals
= TYPE_UNQUALIFIED
;
7162 if (declarator
->kind
== cdk_ptrmem
7163 && (TREE_CODE (type
) == FUNCTION_TYPE
7164 || (quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
7166 tree dummy
= build_decl (TYPE_DECL
, NULL_TREE
, type
);
7167 grok_method_quals (declarator
->u
.pointer
.class_type
,
7169 type
= TREE_TYPE (dummy
);
7170 quals
= TYPE_UNQUALIFIED
;
7173 if (declarator
->kind
== cdk_reference
)
7175 if (!VOID_TYPE_P (type
))
7176 type
= build_reference_type (type
);
7178 else if (TREE_CODE (type
) == METHOD_TYPE
)
7179 type
= build_ptrmemfunc_type (build_pointer_type (type
));
7180 else if (declarator
->kind
== cdk_ptrmem
)
7181 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
7184 type
= build_pointer_type (type
);
7186 /* Process a list of type modifier keywords (such as
7187 const or volatile) that were given inside the `*' or `&'. */
7189 if (declarator
->u
.pointer
.qualifiers
)
7192 = cp_build_qualified_type (type
,
7193 declarator
->u
.pointer
.qualifiers
);
7194 type_quals
= cp_type_quals (type
);
7207 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
7208 && TREE_CODE (type
) != FUNCTION_TYPE
7209 && TREE_CODE (type
) != METHOD_TYPE
)
7211 error ("template-id `%D' used as a declarator",
7213 unqualified_id
= dname
;
7216 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7217 otherwise, we would not have exited the loop above. */
7219 && TREE_CODE (declarator
->u
.id
.name
) == SCOPE_REF
7220 /* If the qualifying scope was invalid, it will have been set to
7222 && TREE_OPERAND (declarator
->u
.id
.name
, 0)
7223 && TYPE_P (TREE_OPERAND (declarator
->u
.id
.name
, 0)))
7227 ctype
= TREE_OPERAND (declarator
->u
.id
.name
, 0);
7229 ctype
= TYPE_MAIN_VARIANT (ctype
);
7231 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
7233 /* You're supposed to have one `template <...>' for every
7234 template class, but you don't need one for a full
7235 specialization. For example:
7237 template <class T> struct S{};
7238 template <> struct S<int> { void f(); };
7239 void S<int>::f () {}
7241 is correct; there shouldn't be a `template <>' for the
7242 definition of `S<int>::f'. */
7243 if (CLASSTYPE_TEMPLATE_INFO (t
)
7244 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t
)
7245 || uses_template_parms (CLASSTYPE_TI_ARGS (t
)))
7246 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
7247 template_count
+= 1;
7249 t
= TYPE_MAIN_DECL (t
);
7250 t
= DECL_CONTEXT (t
);
7253 if (ctype
== current_class_type
)
7259 Is this ill-formed? */
7262 pedwarn ("extra qualification `%T::' on member `%s' ignored",
7265 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7267 tree sname
= TREE_OPERAND (declarator
->u
.id
.name
, 1);
7269 if (TREE_CODE (sname
) == IDENTIFIER_NODE
7270 && NEW_DELETE_OPNAME_P (sname
))
7271 /* Overloaded operator new and operator delete
7272 are always static functions. */
7274 else if (current_class_type
== NULL_TREE
|| friendp
)
7276 = build_method_type_directly (ctype
,
7278 TYPE_ARG_TYPES (type
));
7281 error ("cannot declare member function `%T::%s' within `%T'",
7282 ctype
, name
, current_class_type
);
7283 return error_mark_node
;
7286 else if (declspecs
->specs
[(int)ds_typedef
]
7287 || COMPLETE_TYPE_P (complete_type (ctype
)))
7289 /* Have to move this code elsewhere in this function.
7290 this code is used for i.e., typedef int A::M; M *pm;
7292 It is? How? jason 10/2/94 */
7294 if (current_class_type
)
7296 error ("cannot declare member `%T::%s' within `%T'",
7297 ctype
, name
, current_class_type
);
7298 return void_type_node
;
7303 cxx_incomplete_type_error (NULL_TREE
, ctype
);
7304 return error_mark_node
;
7311 *attrlist
= chainon (returned_attrs
, *attrlist
);
7313 attrlist
= &returned_attrs
;
7316 /* Now TYPE has the actual type. */
7318 /* Did array size calculations overflow? */
7320 if (TREE_CODE (type
) == ARRAY_TYPE
7321 && COMPLETE_TYPE_P (type
)
7322 && TREE_OVERFLOW (TYPE_SIZE (type
)))
7324 error ("size of array `%s' is too large", name
);
7325 /* If we proceed with the array type as it is, we'll eventually
7326 crash in tree_low_cst(). */
7327 type
= error_mark_node
;
7330 if ((decl_context
== FIELD
|| decl_context
== PARM
)
7331 && !processing_template_decl
7332 && variably_modified_type_p (type
, NULL_TREE
))
7334 if (decl_context
== FIELD
)
7335 error ("data member may not have variably modified type `%T'", type
);
7337 error ("parameter may not have variably modified type `%T'", type
);
7338 type
= error_mark_node
;
7341 if (explicitp
== 1 || (explicitp
&& friendp
))
7343 /* [dcl.fct.spec] The explicit specifier shall only be used in
7344 declarations of constructors within a class definition. */
7345 error ("only declarations of constructors can be `explicit'");
7349 if (declspecs
->storage_class
== sc_mutable
)
7351 if (decl_context
!= FIELD
|| friendp
)
7353 error ("non-member `%s' cannot be declared `mutable'", name
);
7354 declspecs
->storage_class
= sc_none
;
7356 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
7358 error ("non-object member `%s' cannot be declared `mutable'", name
);
7359 declspecs
->storage_class
= sc_none
;
7361 else if (TREE_CODE (type
) == FUNCTION_TYPE
7362 || TREE_CODE (type
) == METHOD_TYPE
)
7364 error ("function `%s' cannot be declared `mutable'", name
);
7365 declspecs
->storage_class
= sc_none
;
7369 error ("static `%s' cannot be declared `mutable'", name
);
7370 declspecs
->storage_class
= sc_none
;
7372 else if (type_quals
& TYPE_QUAL_CONST
)
7374 error ("const `%s' cannot be declared `mutable'", name
);
7375 declspecs
->storage_class
= sc_none
;
7379 /* If this is declaring a typedef name, return a TYPE_DECL. */
7380 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
7384 /* Note that the grammar rejects storage classes
7385 in typenames, fields or parameters. */
7386 if (current_lang_name
== lang_name_java
)
7387 TYPE_FOR_JAVA (type
) = 1;
7389 if (decl_context
== FIELD
)
7391 if (constructor_name_p (unqualified_id
, current_class_type
))
7392 pedwarn ("ISO C++ forbids nested type `%D' with same name as enclosing class",
7394 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
7398 decl
= build_decl (TYPE_DECL
, unqualified_id
, type
);
7399 if (in_namespace
|| ctype
)
7400 error ("%Jtypedef name may not be a nested-name-specifier", decl
);
7401 if (!current_function_decl
)
7402 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
7405 /* If the user declares "typedef struct {...} foo" then the
7406 struct will have an anonymous name. Fill that name in now.
7407 Nothing can refer to it, so nothing needs know about the name
7409 if (type
!= error_mark_node
7412 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
7413 && TYPE_ANONYMOUS_P (type
)
7414 /* Don't do this if there are attributes. */
7415 && (!attrlist
|| !*attrlist
)
7416 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
7418 tree oldname
= TYPE_NAME (type
);
7421 /* Replace the anonymous name with the real name everywhere. */
7422 lookup_tag_reverse (type
, unqualified_id
);
7423 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
7424 if (TYPE_NAME (t
) == oldname
)
7425 TYPE_NAME (t
) = decl
;
7427 if (TYPE_LANG_SPECIFIC (type
))
7428 TYPE_WAS_ANONYMOUS (type
) = 1;
7430 /* If this is a typedef within a template class, the nested
7431 type is a (non-primary) template. The name for the
7432 template needs updating as well. */
7433 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
7434 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
7435 = TYPE_IDENTIFIER (type
);
7437 /* FIXME remangle member functions; member functions of a
7438 type with external linkage have external linkage. */
7443 if (ctype
== NULL_TREE
)
7445 if (TREE_CODE (type
) != METHOD_TYPE
)
7446 error ("%Jinvalid type qualifier for non-member function type",
7449 ctype
= TYPE_METHOD_BASETYPE (type
);
7451 if (ctype
!= NULL_TREE
)
7452 grok_method_quals (ctype
, decl
, quals
);
7455 if (declspecs
->specs
[(int)ds_signed
]
7456 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
7457 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
7459 bad_specifiers (decl
, "type", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7460 inlinep
, friendp
, raises
!= NULL_TREE
);
7465 /* Detect the case of an array type of unspecified size
7466 which came, as such, direct from a typedef name.
7467 We must copy the type, so that the array's domain can be
7468 individually set by the object's initializer. */
7470 if (type
&& typedef_type
7471 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
7472 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
7473 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
7475 /* Detect where we're using a typedef of function type to declare a
7476 function. PARMS will not be set, so we must create it now. */
7478 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7480 tree decls
= NULL_TREE
;
7483 for (args
= TYPE_ARG_TYPES (type
); args
; args
= TREE_CHAIN (args
))
7485 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
7487 TREE_CHAIN (decl
) = decls
;
7491 parms
= nreverse (decls
);
7494 /* If this is a type name (such as, in a cast or sizeof),
7495 compute the type and return it now. */
7497 if (decl_context
== TYPENAME
)
7499 /* Note that the grammar rejects storage classes
7500 in typenames, fields or parameters. */
7501 if (type_quals
!= TYPE_UNQUALIFIED
)
7502 type_quals
= TYPE_UNQUALIFIED
;
7504 /* Special case: "friend class foo" looks like a TYPENAME context. */
7507 if (type_quals
!= TYPE_UNQUALIFIED
)
7509 error ("type qualifiers specified for friend class declaration");
7510 type_quals
= TYPE_UNQUALIFIED
;
7514 error ("`inline' specified for friend class declaration");
7520 /* Don't allow friend declaration without a class-key. */
7521 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
7522 pedwarn ("template parameters cannot be friends");
7523 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
7524 pedwarn ("friend declaration requires class-key, "
7525 "i.e. `friend class %T::%D'",
7526 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
7528 pedwarn ("friend declaration requires class-key, "
7529 "i.e. `friend %#T'",
7533 /* Only try to do this stuff if we didn't already give up. */
7534 if (type
!= integer_type_node
)
7536 /* A friendly class? */
7537 if (current_class_type
)
7538 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
7541 error ("trying to make class `%T' a friend of global scope",
7544 type
= void_type_node
;
7549 if (ctype
== NULL_TREE
)
7551 if (TREE_CODE (type
) != METHOD_TYPE
)
7552 error ("invalid qualifiers on non-member function type");
7554 ctype
= TYPE_METHOD_BASETYPE (type
);
7558 tree dummy
= build_decl (TYPE_DECL
, unqualified_id
, type
);
7559 grok_method_quals (ctype
, dummy
, quals
);
7560 type
= TREE_TYPE (dummy
);
7566 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
7567 && decl_context
!= CATCHPARM
7568 && TREE_CODE (type
) != UNION_TYPE
7571 error ("abstract declarator `%T' used as declaration", type
);
7572 unqualified_id
= make_anon_name ();
7575 /* `void' at top level (not within pointer)
7576 is allowed only in typedefs or type names.
7577 We don't complain about parms either, but that is because
7578 a better error message can be made later. */
7580 if (TREE_CODE (type
) == VOID_TYPE
&& decl_context
!= PARM
)
7582 if (! unqualified_id
)
7583 error ("unnamed variable or field declared void");
7584 else if (TREE_CODE (unqualified_id
) == IDENTIFIER_NODE
)
7586 if (IDENTIFIER_OPNAME_P (unqualified_id
))
7589 error ("variable or field `%s' declared void", name
);
7592 error ("variable or field declared void");
7593 type
= integer_type_node
;
7596 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7597 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7599 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
7601 if (ctype
|| in_namespace
)
7602 error ("cannot use `::' in parameter declaration");
7604 /* A parameter declared as an array of T is really a pointer to T.
7605 One declared as a function is really a pointer to a function.
7606 One declared as a member is really a pointer to member. */
7608 if (TREE_CODE (type
) == ARRAY_TYPE
)
7610 /* Transfer const-ness of array into that of type pointed to. */
7611 type
= build_pointer_type (TREE_TYPE (type
));
7612 type_quals
= TYPE_UNQUALIFIED
;
7614 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7615 type
= build_pointer_type (type
);
7621 if (decl_context
== PARM
)
7623 decl
= cp_build_parm_decl (unqualified_id
, type
);
7625 bad_specifiers (decl
, "parameter", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7626 inlinep
, friendp
, raises
!= NULL_TREE
);
7628 else if (decl_context
== FIELD
)
7630 /* The C99 flexible array extension. */
7631 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
7632 && TYPE_DOMAIN (type
) == NULL_TREE
)
7634 tree itype
= compute_array_index_type (dname
, integer_zero_node
);
7635 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
7638 if (type
== error_mark_node
)
7640 /* Happens when declaring arrays of sizes which
7641 are error_mark_node, for example. */
7644 else if (in_namespace
&& !friendp
)
7646 /* Something like struct S { int N::j; }; */
7647 error ("invalid use of `::'");
7650 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
7653 tree function_context
;
7655 /* We catch the others as conflicts with the builtin
7657 if (friendp
&& unqualified_id
== ridpointers
[(int) RID_SIGNED
])
7659 error ("function `%D' cannot be declared friend",
7666 if (ctype
== NULL_TREE
)
7667 ctype
= current_class_type
;
7669 if (ctype
== NULL_TREE
)
7671 error ("can't make `%D' into a method -- not in a class",
7673 return void_type_node
;
7676 /* ``A union may [ ... ] not [ have ] virtual functions.''
7678 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
7680 error ("function `%D' declared virtual inside a union",
7682 return void_type_node
;
7685 if (NEW_DELETE_OPNAME_P (unqualified_id
))
7689 error ("`%D' cannot be declared virtual, since it is always static",
7694 else if (staticp
< 2)
7695 type
= build_method_type_directly (ctype
,
7697 TYPE_ARG_TYPES (type
));
7700 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7701 function_context
= (ctype
!= NULL_TREE
) ?
7702 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
7703 publicp
= (! friendp
|| ! staticp
)
7704 && function_context
== NULL_TREE
;
7705 decl
= grokfndecl (ctype
, type
,
7706 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
7707 ? unqualified_id
: dname
,
7710 virtualp
, flags
, quals
, raises
,
7711 friendp
? -1 : 0, friendp
, publicp
, inlinep
,
7712 funcdef_flag
, template_count
, in_namespace
);
7713 if (decl
== NULL_TREE
)
7716 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7717 /* The decl and setting of decl_attr is also turned off. */
7718 decl
= build_decl_attribute_variant (decl
, decl_attr
);
7721 /* [class.conv.ctor]
7723 A constructor declared without the function-specifier
7724 explicit that can be called with a single parameter
7725 specifies a conversion from the type of its first
7726 parameter to the type of its class. Such a constructor
7727 is called a converting constructor. */
7729 DECL_NONCONVERTING_P (decl
) = 1;
7730 else if (DECL_CONSTRUCTOR_P (decl
))
7732 /* The constructor can be called with exactly one
7733 parameter if there is at least one parameter, and
7734 any subsequent parameters have default arguments.
7735 Ignore any compiler-added parms. */
7736 tree arg_types
= FUNCTION_FIRST_USER_PARMTYPE (decl
);
7738 if (arg_types
== void_list_node
7740 && TREE_CHAIN (arg_types
)
7741 && TREE_CHAIN (arg_types
) != void_list_node
7742 && !TREE_PURPOSE (TREE_CHAIN (arg_types
))))
7743 DECL_NONCONVERTING_P (decl
) = 1;
7746 else if (TREE_CODE (type
) == METHOD_TYPE
)
7748 /* We only get here for friend declarations of
7749 members of other classes. */
7750 /* All method decls are public, so tell grokfndecl to set
7751 TREE_PUBLIC, also. */
7752 decl
= grokfndecl (ctype
, type
,
7753 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
7754 ? unqualified_id
: dname
,
7757 virtualp
, flags
, quals
, raises
,
7758 friendp
? -1 : 0, friendp
, 1, 0, funcdef_flag
,
7759 template_count
, in_namespace
);
7760 if (decl
== NULL_TREE
)
7763 else if (!staticp
&& !dependent_type_p (type
)
7764 && !COMPLETE_TYPE_P (complete_type (type
))
7765 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
7768 error ("field `%D' has incomplete type", unqualified_id
);
7770 error ("name `%T' has incomplete type", type
);
7772 /* If we're instantiating a template, tell them which
7773 instantiation made the field's type be incomplete. */
7774 if (current_class_type
7775 && TYPE_NAME (current_class_type
)
7776 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type
))
7778 && declspecs
->type
== type
)
7779 error (" in instantiation of template `%T'",
7780 current_class_type
);
7782 type
= error_mark_node
;
7789 error ("`%E' is neither function nor member function; "
7790 "cannot be declared friend", unqualified_id
);
7798 /* Friends are treated specially. */
7799 if (ctype
== current_class_type
)
7800 warning ("member functions are implicitly friends of their class");
7801 else if (decl
&& DECL_NAME (decl
))
7803 if (template_class_depth (current_class_type
) == 0)
7805 decl
= check_explicit_specialization
7806 (unqualified_id
, decl
, template_count
,
7807 2 * (funcdef_flag
!= 0) + 4);
7808 if (decl
== error_mark_node
)
7809 return error_mark_node
;
7812 decl
= do_friend (ctype
, unqualified_id
, decl
,
7813 *attrlist
, flags
, quals
, funcdef_flag
);
7817 return void_type_node
;
7820 /* Structure field. It may not be a function, except for C++. */
7822 if (decl
== NULL_TREE
)
7828 /* An attempt is being made to initialize a non-static
7829 member. But, from [class.mem]:
7831 4 A member-declarator can contain a
7832 constant-initializer only if it declares a static
7833 member (_class.static_) of integral or enumeration
7834 type, see _class.static.data_.
7836 This used to be relatively common practice, but
7837 the rest of the compiler does not correctly
7838 handle the initialization unless the member is
7839 static so we make it static below. */
7840 pedwarn ("ISO C++ forbids initialization of member `%D'",
7842 pedwarn ("making `%D' static", unqualified_id
);
7846 if (uses_template_parms (type
))
7847 /* We'll check at instantiation time. */
7849 else if (check_static_variable_definition (unqualified_id
,
7851 /* If we just return the declaration, crashes
7852 will sometimes occur. We therefore return
7853 void_type_node, as if this was a friend
7854 declaration, to cause callers to completely
7855 ignore this declaration. */
7856 return void_type_node
;
7861 /* C++ allows static class members. All other work
7862 for this is done by grokfield. */
7863 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
7864 TREE_STATIC (decl
) = 1;
7865 /* In class context, 'static' means public access. */
7866 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
) = 1;
7870 decl
= build_decl (FIELD_DECL
, unqualified_id
, type
);
7871 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
7872 if (declspecs
->storage_class
== sc_mutable
)
7874 DECL_MUTABLE_P (decl
) = 1;
7875 declspecs
->storage_class
= sc_none
;
7879 bad_specifiers (decl
, "field", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7880 inlinep
, friendp
, raises
!= NULL_TREE
);
7883 else if (TREE_CODE (type
) == FUNCTION_TYPE
7884 || TREE_CODE (type
) == METHOD_TYPE
)
7889 if (!unqualified_id
)
7892 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
7893 original_name
= dname
;
7895 original_name
= unqualified_id
;
7897 if (declspecs
->storage_class
== sc_auto
)
7898 error ("storage class `auto' invalid for function `%s'", name
);
7899 else if (declspecs
->storage_class
== sc_register
)
7900 error ("storage class `register' invalid for function `%s'", name
);
7901 else if (declspecs
->specs
[(int)ds_thread
])
7902 error ("storage class `__thread' invalid for function `%s'", name
);
7904 /* Function declaration not at top level.
7905 Storage classes other than `extern' are not allowed
7906 and `extern' makes no difference. */
7907 if (! toplevel_bindings_p ()
7908 && (declspecs
->storage_class
== sc_static
7909 || declspecs
->specs
[(int)ds_inline
])
7912 if (declspecs
->storage_class
== sc_static
)
7913 pedwarn ("`static' specified invalid for function `%s' declared out of global scope", name
);
7915 pedwarn ("`inline' specifier invalid for function `%s' declared out of global scope", name
);
7918 if (ctype
== NULL_TREE
)
7922 error ("virtual non-class function `%s'", name
);
7926 else if (TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
7927 && !NEW_DELETE_OPNAME_P (original_name
))
7928 type
= build_method_type_directly (ctype
,
7930 TYPE_ARG_TYPES (type
));
7932 /* Record presence of `static'. */
7933 publicp
= (ctype
!= NULL_TREE
7934 || declspecs
->storage_class
== sc_extern
7935 || declspecs
->storage_class
!= sc_static
);
7937 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
7938 virtualp
, flags
, quals
, raises
,
7940 publicp
, inlinep
, funcdef_flag
,
7941 template_count
, in_namespace
);
7942 if (decl
== NULL_TREE
)
7947 int invalid_static
= 0;
7949 /* Don't allow a static member function in a class, and forbid
7950 declaring main to be static. */
7951 if (TREE_CODE (type
) == METHOD_TYPE
)
7953 pedwarn ("cannot declare member function `%D' to have static linkage", decl
);
7956 else if (current_function_decl
)
7958 /* FIXME need arm citation */
7959 error ("cannot declare static function inside another function");
7966 declspecs
->storage_class
= sc_none
;
7972 /* It's a variable. */
7974 /* An uninitialized decl with `extern' is a reference. */
7975 decl
= grokvardecl (type
, unqualified_id
,
7978 (type_quals
& TYPE_QUAL_CONST
) != 0,
7979 ctype
? ctype
: in_namespace
);
7980 bad_specifiers (decl
, "variable", virtualp
, quals
!= TYPE_UNQUALIFIED
,
7981 inlinep
, friendp
, raises
!= NULL_TREE
);
7985 DECL_CONTEXT (decl
) = ctype
;
7988 pedwarn ("`static' may not be used when defining (as opposed to declaring) a static data member");
7990 declspecs
->storage_class
= sc_none
;
7992 if (declspecs
->storage_class
== sc_register
&& TREE_STATIC (decl
))
7994 error ("static member `%D' declared `register'", decl
);
7995 declspecs
->storage_class
= sc_none
;
7997 if (declspecs
->storage_class
== sc_extern
&& pedantic
)
7999 pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
8001 declspecs
->storage_class
= sc_none
;
8006 /* Record `register' declaration for warnings on &
8007 and in case doing stupid register allocation. */
8009 if (declspecs
->storage_class
== sc_register
)
8010 DECL_REGISTER (decl
) = 1;
8011 else if (declspecs
->storage_class
== sc_extern
)
8012 DECL_THIS_EXTERN (decl
) = 1;
8013 else if (declspecs
->storage_class
== sc_static
)
8014 DECL_THIS_STATIC (decl
) = 1;
8016 /* Record constancy and volatility. There's no need to do this
8017 when processing a template; we'll do this for the instantiated
8018 declaration based on the type of DECL. */
8019 if (!processing_template_decl
)
8020 c_apply_type_quals_to_decl (type_quals
, decl
);
8026 /* Subroutine of start_function. Ensure that each of the parameter
8027 types (as listed in PARMS) is complete, as is required for a
8028 function definition. */
8031 require_complete_types_for_parms (tree parms
)
8033 for (; parms
; parms
= TREE_CHAIN (parms
))
8035 if (VOID_TYPE_P (TREE_TYPE (parms
)))
8036 /* grokparms will have already issued an error. */
8037 TREE_TYPE (parms
) = error_mark_node
;
8038 else if (complete_type_or_else (TREE_TYPE (parms
), parms
))
8040 layout_decl (parms
, 0);
8041 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
8046 /* Returns nonzero if T is a local variable. */
8049 local_variable_p (tree t
)
8051 if ((TREE_CODE (t
) == VAR_DECL
8052 /* A VAR_DECL with a context that is a _TYPE is a static data
8054 && !TYPE_P (CP_DECL_CONTEXT (t
))
8055 /* Any other non-local variable must be at namespace scope. */
8056 && !DECL_NAMESPACE_SCOPE_P (t
))
8057 || (TREE_CODE (t
) == PARM_DECL
))
8063 /* Returns nonzero if T is an automatic local variable or a label.
8064 (These are the declarations that need to be remapped when the code
8065 containing them is duplicated.) */
8068 nonstatic_local_decl_p (tree t
)
8070 return ((local_variable_p (t
) && !TREE_STATIC (t
))
8071 || TREE_CODE (t
) == LABEL_DECL
8072 || TREE_CODE (t
) == RESULT_DECL
);
8075 /* Like local_variable_p, but suitable for use as a tree-walking
8079 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
8080 void *data ATTRIBUTE_UNUSED
)
8082 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
8084 else if (TYPE_P (*tp
))
8091 /* Check that ARG, which is a default-argument expression for a
8092 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8093 something goes wrong. DECL may also be a _TYPE node, rather than a
8094 DECL, if there is no DECL available. */
8097 check_default_argument (tree decl
, tree arg
)
8102 if (TREE_CODE (arg
) == DEFAULT_ARG
)
8103 /* We get a DEFAULT_ARG when looking at an in-class declaration
8104 with a default argument. Ignore the argument for now; we'll
8105 deal with it after the class is complete. */
8108 if (processing_template_decl
|| uses_template_parms (arg
))
8109 /* We don't do anything checking until instantiation-time. Note
8110 that there may be uninstantiated arguments even for an
8111 instantiated function, since default arguments are not
8112 instantiated until they are needed. */
8121 decl_type
= TREE_TYPE (decl
);
8123 if (arg
== error_mark_node
8124 || decl
== error_mark_node
8125 || TREE_TYPE (arg
) == error_mark_node
8126 || decl_type
== error_mark_node
)
8127 /* Something already went wrong. There's no need to check
8129 return error_mark_node
;
8131 /* [dcl.fct.default]
8133 A default argument expression is implicitly converted to the
8135 if (!TREE_TYPE (arg
)
8136 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
))
8139 error ("default argument for `%#D' has type `%T'",
8140 decl
, TREE_TYPE (arg
));
8142 error ("default argument for parameter of type `%T' has type `%T'",
8143 decl_type
, TREE_TYPE (arg
));
8145 return error_mark_node
;
8148 /* [dcl.fct.default]
8150 Local variables shall not be used in default argument
8153 The keyword `this' shall not be used in a default argument of a
8155 var
= walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
,
8159 error ("default argument `%E' uses local variable `%D'",
8161 return error_mark_node
;
8168 /* Decode the list of parameter types for a function type.
8169 Given the list of things declared inside the parens,
8170 return a list of types.
8172 If this parameter does not end with an ellipsis, we append
8175 *PARMS is set to the chain of PARM_DECLs created. */
8178 grokparms (cp_parameter_declarator
*first_parm
, tree
*parms
)
8180 tree result
= NULL_TREE
;
8181 tree decls
= NULL_TREE
;
8182 int ellipsis
= !first_parm
|| first_parm
->ellipsis_p
;
8183 cp_parameter_declarator
*parm
;
8186 for (parm
= first_parm
; parm
!= NULL
; parm
= parm
->next
)
8188 tree type
= NULL_TREE
;
8189 tree init
= parm
->default_argument
;
8193 if (parm
== no_parameters
)
8196 attrs
= parm
->decl_specifiers
.attributes
;
8197 parm
->decl_specifiers
.attributes
= NULL_TREE
;
8198 decl
= grokdeclarator (parm
->declarator
, &parm
->decl_specifiers
,
8199 PARM
, init
!= NULL_TREE
, &attrs
);
8200 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
8204 cplus_decl_attributes (&decl
, attrs
, 0);
8206 type
= TREE_TYPE (decl
);
8207 if (VOID_TYPE_P (type
))
8209 if (same_type_p (type
, void_type_node
)
8210 && !DECL_NAME (decl
) && !result
&& !parm
->next
&& !ellipsis
)
8211 /* this is a parmlist of `(void)', which is ok. */
8213 cxx_incomplete_type_error (decl
, type
);
8214 /* It's not a good idea to actually create parameters of
8215 type `void'; other parts of the compiler assume that a
8216 void type terminates the parameter list. */
8217 type
= error_mark_node
;
8218 TREE_TYPE (decl
) = error_mark_node
;
8221 if (type
!= error_mark_node
)
8223 /* Top-level qualifiers on the parameters are
8224 ignored for function types. */
8225 type
= cp_build_qualified_type (type
, 0);
8226 if (TREE_CODE (type
) == METHOD_TYPE
)
8228 error ("parameter `%D' invalidly declared method type", decl
);
8229 type
= build_pointer_type (type
);
8230 TREE_TYPE (decl
) = type
;
8232 else if (abstract_virtuals_error (decl
, type
))
8233 any_error
= 1; /* Seems like a good idea. */
8234 else if (POINTER_TYPE_P (type
))
8236 /* [dcl.fct]/6, parameter types cannot contain pointers
8237 (references) to arrays of unknown bound. */
8238 tree t
= TREE_TYPE (type
);
8239 int ptr
= TYPE_PTR_P (type
);
8245 else if (TREE_CODE (t
) != ARRAY_TYPE
)
8247 else if (!TYPE_DOMAIN (t
))
8251 if (TREE_CODE (t
) == ARRAY_TYPE
)
8252 error ("parameter `%D' includes %s to array of unknown bound `%T'",
8253 decl
, ptr
? "pointer" : "reference", t
);
8256 if (!any_error
&& init
)
8257 init
= check_default_argument (decl
, init
);
8262 TREE_CHAIN (decl
) = decls
;
8264 result
= tree_cons (init
, type
, result
);
8266 decls
= nreverse (decls
);
8267 result
= nreverse (result
);
8269 result
= chainon (result
, void_list_node
);
8276 /* D is a constructor or overloaded `operator='.
8278 Let T be the class in which D is declared. Then, this function
8281 -1 if D's is an ill-formed constructor or copy assignment operator
8282 whose first parameter is of type `T'.
8283 0 if D is not a copy constructor or copy assignment
8285 1 if D is a copy constructor or copy assignment operator whose
8286 first parameter is a reference to const qualified T.
8287 2 if D is a copy constructor or copy assignment operator whose
8288 first parameter is a reference to non-const qualified T.
8290 This function can be used as a predicate. Positive values indicate
8291 a copy constructor and nonzero values indicate a copy assignment
8301 my_friendly_assert (DECL_FUNCTION_MEMBER_P (d
), 20011208);
8303 if (DECL_TEMPLATE_INFO (d
) && is_member_template (DECL_TI_TEMPLATE (d
)))
8304 /* Instantiations of template member functions are never copy
8305 functions. Note that member functions of templated classes are
8306 represented as template functions internally, and we must
8307 accept those as copy functions. */
8310 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
8314 arg_type
= TREE_VALUE (args
);
8316 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
8318 /* Pass by value copy assignment operator. */
8321 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
8322 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
8324 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
8330 args
= TREE_CHAIN (args
);
8332 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
8333 /* There are more non-optional args. */
8339 /* Remember any special properties of member function DECL. */
8341 void grok_special_member_properties (tree decl
)
8343 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl
))
8344 ; /* Not special. */
8345 else if (DECL_CONSTRUCTOR_P (decl
))
8347 int ctor
= copy_fn_p (decl
);
8353 A non-template constructor for class X is a copy
8354 constructor if its first parameter is of type X&, const
8355 X&, volatile X& or const volatile X&, and either there
8356 are no other parameters or else all other parameters have
8357 default arguments. */
8358 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl
)) = 1;
8360 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl
)) = 1;
8362 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
8363 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl
)) = 1;
8365 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
8369 A non-template assignment operator for class X is a copy
8370 assignment operator if its parameter is of type X, X&, const
8371 X&, volatile X& or const volatile X&. */
8373 int assop
= copy_fn_p (decl
);
8377 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl
)) = 1;
8379 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl
)) = 1;
8380 if (DECL_PURE_VIRTUAL_P (decl
))
8381 TYPE_HAS_ABSTRACT_ASSIGN_REF (DECL_CONTEXT (decl
)) = 1;
8386 /* Check a constructor DECL has the correct form. Complains
8387 if the class has a constructor of the form X(X). */
8390 grok_ctor_properties (tree ctype
, tree decl
)
8392 int ctor_parm
= copy_fn_p (decl
);
8398 A declaration of a constructor for a class X is ill-formed if
8399 its first parameter is of type (optionally cv-qualified) X
8400 and either there are no other parameters or else all other
8401 parameters have default arguments.
8403 We *don't* complain about member template instantiations that
8404 have this form, though; they can occur as we try to decide
8405 what constructor to use during overload resolution. Since
8406 overload resolution will never prefer such a constructor to
8407 the non-template copy constructor (which is either explicitly
8408 or implicitly defined), there's no need to worry about their
8409 existence. Theoretically, they should never even be
8410 instantiated, but that's hard to forestall. */
8411 error ("invalid constructor; you probably meant `%T (const %T&)'",
8419 /* An operator with this code is unary, but can also be binary. */
8422 ambi_op_p (enum tree_code code
)
8424 return (code
== INDIRECT_REF
8425 || code
== ADDR_EXPR
8426 || code
== CONVERT_EXPR
8427 || code
== NEGATE_EXPR
8428 || code
== PREINCREMENT_EXPR
8429 || code
== PREDECREMENT_EXPR
);
8432 /* An operator with this name can only be unary. */
8435 unary_op_p (enum tree_code code
)
8437 return (code
== TRUTH_NOT_EXPR
8438 || code
== BIT_NOT_EXPR
8439 || code
== COMPONENT_REF
8440 || code
== TYPE_EXPR
);
8443 /* DECL is a declaration for an overloaded operator. Returns true if
8444 the declaration is valid; false otherwise. If COMPLAIN is true,
8445 errors are issued for invalid declarations. */
8448 grok_op_properties (tree decl
, int friendp
, bool complain
)
8450 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
8452 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
8453 tree name
= DECL_NAME (decl
);
8454 enum tree_code operator_code
;
8458 /* Assume that the declaration is valid. */
8461 /* Count the number of arguments. */
8462 for (argtype
= argtypes
, arity
= 0;
8463 argtype
&& argtype
!= void_list_node
;
8464 argtype
= TREE_CHAIN (argtype
))
8467 if (current_class_type
== NULL_TREE
)
8470 if (DECL_CONV_FN_P (decl
))
8471 operator_code
= TYPE_EXPR
;
8475 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8476 if (ansi_opname (CODE) == name) \
8478 operator_code = (CODE); \
8481 else if (ansi_assopname (CODE) == name) \
8483 operator_code = (CODE); \
8484 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8488 #include "operators.def"
8494 my_friendly_assert (operator_code
!= LAST_CPLUS_TREE_CODE
, 20000526);
8495 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
8499 switch (operator_code
)
8502 TYPE_HAS_NEW_OPERATOR (current_class_type
) = 1;
8506 TYPE_GETS_DELETE (current_class_type
) |= 1;
8510 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type
) = 1;
8513 case VEC_DELETE_EXPR
:
8514 TYPE_GETS_DELETE (current_class_type
) |= 2;
8522 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
8523 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
8524 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
8525 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
8528 /* An operator function must either be a non-static member function
8529 or have at least one parameter of a class, a reference to a class,
8530 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8531 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
8533 if (operator_code
== TYPE_EXPR
8534 || operator_code
== CALL_EXPR
8535 || operator_code
== COMPONENT_REF
8536 || operator_code
== ARRAY_REF
8537 || operator_code
== NOP_EXPR
)
8538 error ("`%D' must be a nonstatic member function", decl
);
8543 if (DECL_STATIC_FUNCTION_P (decl
))
8544 error ("`%D' must be either a non-static member function or a non-member function", decl
);
8546 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
8548 tree arg
= non_reference (TREE_VALUE (p
));
8549 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8550 because these checks are performed even on
8551 template functions. */
8552 if (IS_AGGR_TYPE (arg
) || TREE_CODE (arg
) == ENUMERAL_TYPE
)
8556 if (!p
|| p
== void_list_node
)
8561 error ("`%D' must have an argument of class or "
8569 /* There are no restrictions on the arguments to an overloaded
8571 if (operator_code
== CALL_EXPR
)
8574 if (IDENTIFIER_TYPENAME_P (name
) && ! DECL_TEMPLATE_INFO (decl
))
8576 tree t
= TREE_TYPE (name
);
8579 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
8580 const char *what
= 0;
8583 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
8585 if (TREE_CODE (t
) == VOID_TYPE
)
8587 else if (t
== current_class_type
)
8588 what
= "the same type";
8589 /* Don't force t to be complete here. */
8590 else if (IS_AGGR_TYPE (t
)
8591 && COMPLETE_TYPE_P (t
)
8592 && DERIVED_FROM_P (t
, current_class_type
))
8593 what
= "a base class";
8595 if (what
&& warn_conversion
)
8596 warning ("conversion to %s%s will never use a type conversion operator",
8597 ref
? "a reference to " : "", what
);
8600 if (operator_code
== COND_EXPR
)
8603 error ("ISO C++ prohibits overloading operator ?:");
8605 else if (ambi_op_p (operator_code
))
8608 /* We pick the one-argument operator codes by default, so
8609 we don't have to change anything. */
8611 else if (arity
== 2)
8613 /* If we thought this was a unary operator, we now know
8614 it to be a binary operator. */
8615 switch (operator_code
)
8618 operator_code
= MULT_EXPR
;
8622 operator_code
= BIT_AND_EXPR
;
8626 operator_code
= PLUS_EXPR
;
8630 operator_code
= MINUS_EXPR
;
8633 case PREINCREMENT_EXPR
:
8634 operator_code
= POSTINCREMENT_EXPR
;
8637 case PREDECREMENT_EXPR
:
8638 operator_code
= POSTDECREMENT_EXPR
;
8645 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
8647 if ((operator_code
== POSTINCREMENT_EXPR
8648 || operator_code
== POSTDECREMENT_EXPR
)
8649 && ! processing_template_decl
8650 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
8653 error ("postfix `%D' must take `int' as its argument",
8657 ("postfix `%D' must take `int' as its second argument",
8664 error ("`%D' must take either zero or one argument", decl
);
8666 error ("`%D' must take either one or two arguments", decl
);
8669 /* More Effective C++ rule 6. */
8671 && (operator_code
== POSTINCREMENT_EXPR
8672 || operator_code
== POSTDECREMENT_EXPR
8673 || operator_code
== PREINCREMENT_EXPR
8674 || operator_code
== PREDECREMENT_EXPR
))
8676 tree arg
= TREE_VALUE (argtypes
);
8677 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
8678 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
8679 arg
= TREE_TYPE (arg
);
8680 arg
= TYPE_MAIN_VARIANT (arg
);
8681 if (operator_code
== PREINCREMENT_EXPR
8682 || operator_code
== PREDECREMENT_EXPR
)
8684 if (TREE_CODE (ret
) != REFERENCE_TYPE
8685 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
8687 warning ("prefix `%D' should return `%T'", decl
,
8688 build_reference_type (arg
));
8692 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
8693 warning ("postfix `%D' should return `%T'", decl
, arg
);
8697 else if (unary_op_p (operator_code
))
8702 error ("`%D' must take `void'", decl
);
8704 error ("`%D' must take exactly one argument", decl
);
8707 else /* if (binary_op_p (operator_code)) */
8712 error ("`%D' must take exactly one argument", decl
);
8714 error ("`%D' must take exactly two arguments", decl
);
8717 /* More Effective C++ rule 7. */
8719 && (operator_code
== TRUTH_ANDIF_EXPR
8720 || operator_code
== TRUTH_ORIF_EXPR
8721 || operator_code
== COMPOUND_EXPR
))
8722 warning ("user-defined `%D' always evaluates both arguments",
8726 /* Effective C++ rule 23. */
8729 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
8730 && (operator_code
== PLUS_EXPR
8731 || operator_code
== MINUS_EXPR
8732 || operator_code
== TRUNC_DIV_EXPR
8733 || operator_code
== MULT_EXPR
8734 || operator_code
== TRUNC_MOD_EXPR
)
8735 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
8736 warning ("`%D' should return by value", decl
);
8739 for (; argtypes
&& argtypes
!= void_list_node
;
8740 argtypes
= TREE_CHAIN (argtypes
))
8741 if (TREE_PURPOSE (argtypes
))
8743 TREE_PURPOSE (argtypes
) = NULL_TREE
;
8744 if (operator_code
== POSTINCREMENT_EXPR
8745 || operator_code
== POSTDECREMENT_EXPR
)
8748 pedwarn ("`%D' cannot have default arguments", decl
);
8751 error ("`%D' cannot have default arguments", decl
);
8760 tag_name (enum tag_types code
)
8777 /* Name lookup in an elaborated-type-specifier (after the keyword
8778 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
8779 elaborated-type-specifier is invalid, issue a diagnostic and return
8780 error_mark_node; otherwise, return the *_TYPE to which it referred.
8781 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
8784 check_elaborated_type_specifier (enum tag_types tag_code
,
8786 bool allow_template_p
)
8792 struct S { struct S *p; };
8794 name lookup will find the TYPE_DECL for the implicit "S::S"
8795 typedef. Adjust for that here. */
8796 if (DECL_SELF_REFERENCE_P (decl
))
8797 decl
= TYPE_NAME (TREE_TYPE (decl
));
8799 type
= TREE_TYPE (decl
);
8803 If the identifier resolves to a typedef-name or a template
8804 type-parameter, the elaborated-type-specifier is ill-formed.
8806 In other words, the only legitimate declaration to use in the
8807 elaborated type specifier is the implicit typedef created when
8808 the type is declared. */
8809 if (!DECL_IMPLICIT_TYPEDEF_P (decl
))
8811 error ("using typedef-name `%D' after `%s'", decl
, tag_name (tag_code
));
8812 return IS_AGGR_TYPE (type
) ? type
: error_mark_node
;
8815 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
8817 error ("using template type parameter `%T' after `%s'",
8818 type
, tag_name (tag_code
));
8819 return error_mark_node
;
8821 else if (TREE_CODE (type
) != RECORD_TYPE
8822 && TREE_CODE (type
) != UNION_TYPE
8823 && tag_code
!= enum_type
)
8825 error ("`%T' referred to as `%s'", type
, tag_name (tag_code
));
8826 return error_mark_node
;
8828 else if (TREE_CODE (type
) != ENUMERAL_TYPE
8829 && tag_code
== enum_type
)
8831 error ("`%T' referred to as enum", type
);
8832 return error_mark_node
;
8834 else if (!allow_template_p
8835 && TREE_CODE (type
) == RECORD_TYPE
8836 && CLASSTYPE_IS_TEMPLATE (type
))
8838 /* If a class template appears as elaborated type specifier
8839 without a template header such as:
8841 template <class T> class C {};
8842 void f(class C); // No template header here
8844 then the required template argument is missing. */
8846 error ("template argument required for `%s %T'",
8847 tag_name (tag_code
),
8848 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
8849 return error_mark_node
;
8855 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
8856 Define the tag as a forward-reference if it is not defined.
8858 If a declaration is given, process it here, and report an error if
8859 multiple declarations are not identical.
8861 GLOBALIZE is false when this is also a definition. Only look in
8862 the current frame for the name (since C++ allows new names in any
8865 TEMPLATE_HEADER_P is true when this declaration is preceded by
8866 a set of template parameters. */
8869 xref_tag (enum tag_types tag_code
, tree name
,
8870 bool globalize
, bool template_header_p
)
8872 enum tree_code code
;
8874 struct cp_binding_level
*b
= current_binding_level
;
8875 tree context
= NULL_TREE
;
8877 timevar_push (TV_NAME_LOOKUP
);
8879 my_friendly_assert (TREE_CODE (name
) == IDENTIFIER_NODE
, 0);
8891 code
= ENUMERAL_TYPE
;
8899 /* If we know we are defining this tag, only look it up in
8900 this scope and don't try to find it as a type. */
8901 t
= lookup_tag (code
, name
, b
, 1);
8905 tree decl
= lookup_name (name
, 2);
8907 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
8908 decl
= DECL_TEMPLATE_RESULT (decl
);
8910 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
8912 /* Two cases we need to consider when deciding if a class
8913 template is allowed as an elaborated type specifier:
8914 1. It is a self reference to its own class.
8915 2. It comes with a template header.
8919 template <class T> class C {
8920 class C *c1; // DECL_SELF_REFERENCE_P is true
8923 template <class U> class C; // template_header_p is true
8924 template <class T> class C<T>::D {
8925 class C *c2; // DECL_SELF_REFERENCE_P is true
8928 t
= check_elaborated_type_specifier (tag_code
,
8931 | DECL_SELF_REFERENCE_P (decl
));
8932 if (t
== error_mark_node
)
8933 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
8938 if (t
&& current_class_type
8939 && template_class_depth (current_class_type
)
8940 && template_header_p
)
8942 /* Since GLOBALIZE is nonzero, we are not looking at a
8943 definition of this tag. Since, in addition, we are currently
8944 processing a (member) template declaration of a template
8945 class, we must be very careful; consider:
8952 { template <class V>
8953 friend struct S1; };
8955 Here, the S2::S1 declaration should not be confused with the
8956 outer declaration. In particular, the inner version should
8957 have a template parameter of level 2, not level 1. This
8958 would be particularly important if the member declaration
8961 template <class V = U> friend struct S1;
8963 say, when we should tsubst into `U' when instantiating
8964 S2. On the other hand, when presented with:
8974 we must find the inner binding eventually. We
8975 accomplish this by making sure that the new type we
8976 create to represent this declaration has the right
8978 context
= TYPE_CONTEXT (t
);
8985 /* If no such tag is yet defined, create a forward-reference node
8986 and record it as the "definition".
8987 When a real declaration of this type is found,
8988 the forward-reference will be altered into a real type. */
8989 if (code
== ENUMERAL_TYPE
)
8991 error ("use of enum `%#D' without previous declaration", name
);
8992 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
8996 t
= make_aggr_type (code
);
8997 TYPE_CONTEXT (t
) = context
;
8998 pushtag (name
, t
, globalize
);
9003 if (!globalize
&& processing_template_decl
&& IS_AGGR_TYPE (t
))
9004 redeclare_class_template (t
, current_template_parms
);
9005 else if (!processing_template_decl
9007 && CLASSTYPE_IS_TEMPLATE (t
))
9009 error ("redeclaration of `%T' as a non-template", t
);
9010 t
= error_mark_node
;
9014 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, t
);
9018 xref_tag_from_type (tree old
, tree id
, int globalize
)
9020 enum tag_types tag_kind
;
9022 if (TREE_CODE (old
) == RECORD_TYPE
)
9023 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
9025 tag_kind
= union_type
;
9027 if (id
== NULL_TREE
)
9028 id
= TYPE_IDENTIFIER (old
);
9030 return xref_tag (tag_kind
, id
, globalize
, false);
9033 /* REF is a type (named NAME), for which we have just seen some
9034 baseclasses. BASE_LIST is a list of those baseclasses; the
9035 TREE_PURPOSE is an access_* node, and the TREE_VALUE is the type of
9036 the base-class. Non-NULL TREE_TYPE indicates virtual inheritance.
9037 CODE_TYPE_NODE indicates whether REF is a class, struct, or
9041 xref_basetypes (tree ref
, tree base_list
)
9043 /* In the declaration `A : X, Y, ... Z' we mark all the types
9044 (A, X, Y, ..., Z) so we can check for duplicates. */
9046 unsigned max_vbases
= 0;
9048 enum tag_types tag_code
;
9050 if (ref
== error_mark_node
)
9053 if (TREE_CODE (ref
) == UNION_TYPE
)
9055 error ("derived union `%T' invalid", ref
);
9059 tag_code
= (CLASSTYPE_DECLARED_CLASS (ref
) ? class_type
: record_type
);
9061 /* First, make sure that any templates in base-classes are
9062 instantiated. This ensures that if we call ourselves recursively
9063 we do not get confused about which classes are marked and which
9068 tree basetype
= TREE_VALUE (*basep
);
9069 if (!(processing_template_decl
&& uses_template_parms (basetype
))
9070 && !complete_type_or_else (basetype
, NULL
))
9071 /* An incomplete type. Remove it from the list. */
9072 *basep
= TREE_CHAIN (*basep
);
9074 basep
= &TREE_CHAIN (*basep
);
9077 SET_CLASSTYPE_MARKED (ref
);
9078 i
= list_length (base_list
);
9081 tree binfo
= TYPE_BINFO (ref
);
9082 tree binfos
= make_tree_vec (i
);
9083 tree accesses
= make_tree_vec (i
);
9085 BINFO_BASE_BINFOS (binfo
) = binfos
;
9086 BINFO_BASE_ACCESSES (binfo
) = accesses
;
9088 for (i
= 0; base_list
; base_list
= TREE_CHAIN (base_list
))
9090 tree access
= TREE_PURPOSE (base_list
);
9091 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
9092 tree basetype
= TREE_VALUE (base_list
);
9097 if (access
== access_default_node
)
9098 /* The base of a derived struct is public by default. */
9099 access
= (tag_code
== class_type
9100 ? access_private_node
: access_public_node
);
9102 if (basetype
&& TREE_CODE (basetype
) == TYPE_DECL
)
9103 basetype
= TREE_TYPE (basetype
);
9105 || (TREE_CODE (basetype
) != RECORD_TYPE
9106 && TREE_CODE (basetype
) != TYPENAME_TYPE
9107 && TREE_CODE (basetype
) != TEMPLATE_TYPE_PARM
9108 && TREE_CODE (basetype
) != BOUND_TEMPLATE_TEMPLATE_PARM
))
9110 error ("base type `%T' fails to be a struct or class type",
9115 if (CLASSTYPE_MARKED (basetype
))
9117 if (basetype
== ref
)
9118 error ("recursive type `%T' undefined", basetype
);
9120 error ("duplicate base type `%T' invalid", basetype
);
9124 if (TYPE_FOR_JAVA (basetype
)
9125 && (current_lang_depth () == 0))
9126 TYPE_FOR_JAVA (ref
) = 1;
9128 if (CLASS_TYPE_P (basetype
))
9130 base_binfo
= TYPE_BINFO (basetype
);
9131 /* This flag will be in the binfo of the base type, we must
9132 clear it after copying the base binfos. */
9133 BINFO_DEPENDENT_BASE_P (base_binfo
)
9134 = dependent_type_p (basetype
);
9137 base_binfo
= make_binfo (size_zero_node
, basetype
,
9138 NULL_TREE
, NULL_TREE
);
9140 TREE_VEC_ELT (binfos
, i
) = base_binfo
;
9141 TREE_VEC_ELT (accesses
, i
) = access
;
9142 /* This flag will be in the binfo of the base type, we must
9143 clear it after copying the base binfos. */
9144 BINFO_VIRTUAL_P (base_binfo
) = via_virtual
;
9146 SET_CLASSTYPE_MARKED (basetype
);
9148 /* We are free to modify these bits because they are meaningless
9149 at top level, and BASETYPE is a top-level type. */
9150 if (via_virtual
|| TYPE_USES_VIRTUAL_BASECLASSES (basetype
))
9152 TYPE_USES_VIRTUAL_BASECLASSES (ref
) = 1;
9153 /* Converting to a virtual base class requires looking
9154 up the offset of the virtual base. */
9155 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref
) = 1;
9158 if (CLASS_TYPE_P (basetype
))
9160 TYPE_HAS_NEW_OPERATOR (ref
)
9161 |= TYPE_HAS_NEW_OPERATOR (basetype
);
9162 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
9163 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
9164 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
9165 /* If the base-class uses multiple inheritance, so do we. */
9166 TYPE_USES_MULTIPLE_INHERITANCE (ref
)
9167 |= TYPE_USES_MULTIPLE_INHERITANCE (basetype
);
9168 /* Likewise, if converting to a base of the base may require
9169 code, then we may need to generate code to convert to a
9171 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref
)
9172 |= TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (basetype
);
9173 max_vbases
+= VEC_length
9174 (tree
, CLASSTYPE_VBASECLASSES (basetype
));
9179 TREE_VEC_LENGTH (accesses
) = TREE_VEC_LENGTH (binfos
) = i
;
9181 BINFO_BASE_ACCESSES (binfo
) = BINFO_BASE_BINFOS (binfo
) = NULL_TREE
;
9183 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, max_vbases
);
9187 TYPE_USES_MULTIPLE_INHERITANCE (ref
) = 1;
9188 /* If there is more than one non-empty they cannot be at the same
9190 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref
) = 1;
9194 /* Copy the base binfos, collect the virtual bases and set the
9195 inheritance order chain. */
9196 copy_base_binfos (TYPE_BINFO (ref
), ref
, NULL_TREE
);
9198 if (TYPE_FOR_JAVA (ref
))
9200 if (TYPE_USES_MULTIPLE_INHERITANCE (ref
))
9201 error ("Java class '%T' cannot have multiple bases", ref
);
9202 if (CLASSTYPE_VBASECLASSES (ref
))
9203 error ("Java class '%T' cannot have virtual bases", ref
);
9206 /* Unmark all the types. */
9209 tree basetype
= BINFO_TYPE (BINFO_BASE_BINFO (TYPE_BINFO (ref
), i
));
9211 CLEAR_CLASSTYPE_MARKED (basetype
);
9212 if (CLASS_TYPE_P (basetype
))
9214 BINFO_VIRTUAL_P (TYPE_BINFO (basetype
)) = 0;
9215 BINFO_DEPENDENT_BASE_P (TYPE_BINFO (basetype
)) = 0;
9218 CLEAR_CLASSTYPE_MARKED (ref
);
9222 /* Begin compiling the definition of an enumeration type.
9223 NAME is its name (or null if anonymous).
9224 Returns the type object, as yet incomplete.
9225 Also records info about it so that build_enumerator
9226 may be used to declare the individual values as they are read. */
9229 start_enum (tree name
)
9231 tree enumtype
= NULL_TREE
;
9232 struct cp_binding_level
*b
= current_binding_level
;
9234 /* If this is the real definition for a previous forward reference,
9235 fill in the contents in the same object that used to be the
9236 forward reference. */
9238 if (name
!= NULL_TREE
)
9239 enumtype
= lookup_tag (ENUMERAL_TYPE
, name
, b
, 1);
9241 if (enumtype
!= NULL_TREE
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
9243 error ("multiple definition of `%#T'", enumtype
);
9244 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype
));
9245 /* Clear out TYPE_VALUES, and start again. */
9246 TYPE_VALUES (enumtype
) = NULL_TREE
;
9250 enumtype
= make_node (ENUMERAL_TYPE
);
9251 pushtag (name
, enumtype
, 0);
9257 /* After processing and defining all the values of an enumeration type,
9258 install their decls in the enumeration type and finish it off.
9259 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9262 finish_enum (tree enumtype
)
9274 integer_type_kind itk
;
9275 tree underlying_type
= NULL_TREE
;
9277 /* We built up the VALUES in reverse order. */
9278 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
9280 /* For an enum defined in a template, just set the type of the values;
9281 all further processing is postponed until the template is
9282 instantiated. We need to set the type so that tsubst of a CONST_DECL
9284 if (processing_template_decl
)
9286 for (values
= TYPE_VALUES (enumtype
);
9288 values
= TREE_CHAIN (values
))
9289 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
9290 if (at_function_scope_p ())
9291 add_stmt (build_min (TAG_DEFN
, enumtype
));
9295 /* Determine the minimum and maximum values of the enumerators. */
9296 if (TYPE_VALUES (enumtype
))
9298 minnode
= maxnode
= NULL_TREE
;
9300 for (values
= TYPE_VALUES (enumtype
);
9302 values
= TREE_CHAIN (values
))
9304 decl
= TREE_VALUE (values
);
9306 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9307 each enumerator has the type of its enumeration. Prior to the
9308 closing brace, the type of each enumerator is the type of its
9309 initializing value. */
9310 TREE_TYPE (decl
) = enumtype
;
9312 /* Update the minimum and maximum values, if appropriate. */
9313 value
= DECL_INITIAL (decl
);
9314 /* Figure out what the minimum and maximum values of the
9317 minnode
= maxnode
= value
;
9318 else if (tree_int_cst_lt (maxnode
, value
))
9320 else if (tree_int_cst_lt (value
, minnode
))
9323 /* Set the TREE_TYPE for the values as well. That's so that when
9324 we call decl_constant_value we get an entity of the right type
9325 (but with the constant value). But first make a copy so we
9326 don't clobber shared INTEGER_CSTs. */
9327 if (TREE_TYPE (value
) != enumtype
)
9329 value
= DECL_INITIAL (decl
) = copy_node (value
);
9330 TREE_TYPE (value
) = enumtype
;
9337 If the enumerator-list is empty, the underlying type is as if
9338 the enumeration had a single enumerator with value 0. */
9339 minnode
= maxnode
= integer_zero_node
;
9341 /* Compute the number of bits require to represent all values of the
9342 enumeration. We must do this before the type of MINNODE and
9343 MAXNODE are transformed, since min_precision relies on the
9344 TREE_TYPE of the value it is passed. */
9345 unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
9346 lowprec
= min_precision (minnode
, unsignedp
);
9347 highprec
= min_precision (maxnode
, unsignedp
);
9348 precision
= MAX (lowprec
, highprec
);
9350 /* Determine the underlying type of the enumeration.
9354 The underlying type of an enumeration is an integral type that
9355 can represent all the enumerator values defined in the
9356 enumeration. It is implementation-defined which integral type is
9357 used as the underlying type for an enumeration except that the
9358 underlying type shall not be larger than int unless the value of
9359 an enumerator cannot fit in an int or unsigned int.
9361 We use "int" or an "unsigned int" as the underlying type, even if
9362 a smaller integral type would work, unless the user has
9363 explicitly requested that we use the smallest possible type. */
9364 for (itk
= (flag_short_enums
? itk_char
: itk_int
);
9368 underlying_type
= integer_types
[itk
];
9369 if (TYPE_PRECISION (underlying_type
) >= precision
9370 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
9373 if (itk
== itk_none
)
9377 IF no integral type can represent all the enumerator values, the
9378 enumeration is ill-formed. */
9379 error ("no integral type can represent all of the enumerator values "
9380 "for `%T'", enumtype
);
9381 precision
= TYPE_PRECISION (long_long_integer_type_node
);
9382 underlying_type
= integer_types
[itk_unsigned_long_long
];
9385 /* Compute the minium and maximum values for the type.
9389 For an enumeration where emin is the smallest enumerator and emax
9390 is the largest, the values of the enumeration are the values of the
9391 underlying type in the range bmin to bmax, where bmin and bmax are,
9392 respectively, the smallest and largest values of the smallest bit-
9393 field that can store emin and emax. */
9394 TYPE_PRECISION (enumtype
) = precision
;
9395 set_min_and_max_values_for_integral_type (enumtype
, precision
, unsignedp
);
9399 The value of sizeof() applied to an enumeration type, an object
9400 of an enumeration type, or an enumerator, is the value of sizeof()
9401 applied to the underlying type. */
9402 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
9403 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
9404 TYPE_MODE (enumtype
) = TYPE_MODE (underlying_type
);
9405 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
9406 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
9407 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
9409 /* Convert each of the enumerators to the type of the underlying
9410 type of the enumeration. */
9411 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
9413 decl
= TREE_VALUE (values
);
9414 value
= perform_implicit_conversion (underlying_type
,
9415 DECL_INITIAL (decl
));
9416 TREE_TYPE (value
) = enumtype
;
9417 DECL_INITIAL (decl
) = value
;
9418 TREE_VALUE (values
) = value
;
9421 /* Fix up all variant types of this enum type. */
9422 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
9424 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
9425 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (enumtype
);
9426 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (enumtype
);
9427 TYPE_SIZE (t
) = TYPE_SIZE (enumtype
);
9428 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (enumtype
);
9429 TYPE_MODE (t
) = TYPE_MODE (enumtype
);
9430 TYPE_PRECISION (t
) = TYPE_PRECISION (enumtype
);
9431 TYPE_ALIGN (t
) = TYPE_ALIGN (enumtype
);
9432 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (enumtype
);
9433 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (enumtype
);
9436 /* Finish debugging output for this type. */
9437 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
9440 /* Build and install a CONST_DECL for an enumeration constant of the
9441 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9442 Assignment of sequential values by default is handled here. */
9445 build_enumerator (tree name
, tree value
, tree enumtype
)
9451 /* Remove no-op casts from the value. */
9453 STRIP_TYPE_NOPS (value
);
9455 if (! processing_template_decl
)
9457 /* Validate and default VALUE. */
9458 if (value
!= NULL_TREE
)
9460 value
= decl_constant_value (value
);
9462 if (TREE_CODE (value
) == INTEGER_CST
)
9464 value
= perform_integral_promotions (value
);
9465 constant_expression_warning (value
);
9469 error ("enumerator value for `%D' not integer constant", name
);
9474 /* Default based on previous value. */
9475 if (value
== NULL_TREE
)
9479 if (TYPE_VALUES (enumtype
))
9481 /* The next value is the previous value ... */
9482 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
9484 value
= cp_build_binary_op (PLUS_EXPR
,
9488 if (tree_int_cst_lt (value
, prev_value
))
9489 error ("overflow in enumeration values at `%D'", name
);
9492 value
= integer_zero_node
;
9495 /* Remove no-op casts from the value. */
9496 STRIP_TYPE_NOPS (value
);
9499 /* C++ associates enums with global, function, or class declarations. */
9500 context
= current_scope ();
9502 context
= current_namespace
;
9504 /* Build the actual enumeration constant. Note that the enumeration
9505 constants have the type of their initializers until the
9506 enumeration is complete:
9510 Following the closing brace of an enum-specifier, each enumer-
9511 ator has the type of its enumeration. Prior to the closing
9512 brace, the type of each enumerator is the type of its
9515 In finish_enum we will reset the type. Of course, if we're
9516 processing a template, there may be no value. */
9517 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
9519 if (context
&& context
== current_class_type
)
9520 /* This enum declaration is local to the class. We need the full
9521 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9522 decl
= build_lang_decl (CONST_DECL
, name
, type
);
9524 /* It's a global enum, or it's local to a function. (Note local to
9525 a function could mean local to a class method. */
9526 decl
= build_decl (CONST_DECL
, name
, type
);
9528 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
9529 TREE_CONSTANT (decl
) = 1;
9530 TREE_INVARIANT (decl
) = 1;
9531 TREE_READONLY (decl
) = 1;
9532 DECL_INITIAL (decl
) = value
;
9534 if (context
&& context
== current_class_type
)
9535 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9536 on the TYPE_FIELDS list for `S'. (That's so that you can say
9537 things like `S::i' later.) */
9538 finish_member_declaration (decl
);
9542 /* Add this enumeration constant to the list for this type. */
9543 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
9547 /* We're defining DECL. Make sure that it's type is OK. */
9550 check_function_type (tree decl
, tree current_function_parms
)
9552 tree fntype
= TREE_TYPE (decl
);
9553 tree return_type
= complete_type (TREE_TYPE (fntype
));
9555 /* In a function definition, arg types must be complete. */
9556 require_complete_types_for_parms (current_function_parms
);
9558 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
9560 error ("return type `%#T' is incomplete", TREE_TYPE (fntype
));
9562 /* Make it return void instead, but don't change the
9563 type of the DECL_RESULT, in case we have a named return value. */
9564 if (TREE_CODE (fntype
) == METHOD_TYPE
)
9566 tree ctype
= TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype
)));
9568 = build_method_type_directly (ctype
,
9570 FUNCTION_ARG_CHAIN (decl
));
9574 = build_function_type (void_type_node
,
9575 TYPE_ARG_TYPES (TREE_TYPE (decl
)));
9577 = build_exception_variant (fntype
,
9578 TYPE_RAISES_EXCEPTIONS (fntype
));
9581 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
9584 /* Create the FUNCTION_DECL for a function definition.
9585 DECLSPECS and DECLARATOR are the parts of the declaration;
9586 they describe the function's name and the type it returns,
9587 but twisted together in a fashion that parallels the syntax of C.
9589 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9590 DECLARATOR is really the DECL for the function we are about to
9591 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9592 indicating that the function is an inline defined in-class.
9594 This function creates a binding context for the function body
9595 as well as setting up the FUNCTION_DECL in current_function_decl.
9597 For C++, we must first check whether that datum makes any sense.
9598 For example, "class A local_a(1,2);" means that variable local_a
9599 is an aggregate of type A, which should have a constructor
9600 applied to it with the argument list [1, 2]. */
9603 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
9605 tree ctype
= NULL_TREE
;
9608 int doing_friend
= 0;
9609 struct cp_binding_level
*bl
;
9610 tree current_function_parms
;
9613 my_friendly_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
, 160);
9614 my_friendly_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
, 161);
9616 fntype
= TREE_TYPE (decl1
);
9617 if (TREE_CODE (fntype
) == METHOD_TYPE
)
9618 ctype
= TYPE_METHOD_BASETYPE (fntype
);
9620 /* ISO C++ 11.4/5. A friend function defined in a class is in
9621 the (lexical) scope of the class in which it is defined. */
9622 if (!ctype
&& DECL_FRIEND_P (decl1
))
9624 ctype
= DECL_FRIEND_CONTEXT (decl1
);
9626 /* CTYPE could be null here if we're dealing with a template;
9627 for example, `inline friend float foo()' inside a template
9628 will have no CTYPE set. */
9629 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
9635 if (DECL_DECLARED_INLINE_P (decl1
)
9636 && lookup_attribute ("noinline", attrs
))
9637 warning ("%Jinline function '%D' given attribute noinline", decl1
, decl1
);
9639 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
9640 /* This is a constructor, we must ensure that any default args
9641 introduced by this definition are propagated to the clones
9642 now. The clones are used directly in overload resolution. */
9643 adjust_clone_args (decl1
);
9645 /* Sometimes we don't notice that a function is a static member, and
9646 build a METHOD_TYPE for it. Fix that up now. */
9647 if (ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
9648 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
)
9650 revert_static_member_fn (decl1
);
9654 /* Set up current_class_type, and enter the scope of the class, if
9657 push_nested_class (ctype
);
9658 else if (DECL_STATIC_FUNCTION_P (decl1
))
9659 push_nested_class (DECL_CONTEXT (decl1
));
9661 /* Now that we have entered the scope of the class, we must restore
9662 the bindings for any template parameters surrounding DECL1, if it
9663 is an inline member template. (Order is important; consider the
9664 case where a template parameter has the same name as a field of
9665 the class.) It is not until after this point that
9666 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
9667 if (flags
& SF_INCLASS_INLINE
)
9668 maybe_begin_member_template_processing (decl1
);
9670 /* Effective C++ rule 15. */
9672 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
9673 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
9674 warning ("`operator=' should return a reference to `*this'");
9676 /* Make the init_value nonzero so pushdecl knows this is not tentative.
9677 error_mark_node is replaced below (in poplevel) with the BLOCK. */
9678 if (!DECL_INITIAL (decl1
))
9679 DECL_INITIAL (decl1
) = error_mark_node
;
9681 /* This function exists in static storage.
9682 (This does not mean `static' in the C sense!) */
9683 TREE_STATIC (decl1
) = 1;
9685 /* We must call push_template_decl after current_class_type is set
9686 up. (If we are processing inline definitions after exiting a
9687 class scope, current_class_type will be NULL_TREE until set above
9688 by push_nested_class.) */
9689 if (processing_template_decl
)
9690 decl1
= push_template_decl (decl1
);
9692 /* We are now in the scope of the function being defined. */
9693 current_function_decl
= decl1
;
9695 /* Save the parm names or decls from this function's declarator
9696 where store_parm_decls will find them. */
9697 current_function_parms
= DECL_ARGUMENTS (decl1
);
9699 /* Make sure the parameter and return types are reasonable. When
9700 you declare a function, these types can be incomplete, but they
9701 must be complete when you define the function. */
9702 if (! processing_template_decl
)
9703 check_function_type (decl1
, current_function_parms
);
9705 /* Build the return declaration for the function. */
9706 restype
= TREE_TYPE (fntype
);
9707 /* Promote the value to int before returning it. */
9708 if (c_promoting_integer_type_p (restype
))
9709 restype
= type_promotes_to (restype
);
9710 if (DECL_RESULT (decl1
) == NULL_TREE
)
9713 = build_decl (RESULT_DECL
, 0, TYPE_MAIN_VARIANT (restype
));
9714 c_apply_type_quals_to_decl (cp_type_quals (restype
),
9715 DECL_RESULT (decl1
));
9718 /* Initialize RTL machinery. We cannot do this until
9719 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
9720 even when processing a template; this is how we get
9721 CFUN set up, and our per-function variables initialized.
9722 FIXME factor out the non-RTL stuff. */
9723 bl
= current_binding_level
;
9724 allocate_struct_function (decl1
);
9725 current_binding_level
= bl
;
9727 /* Even though we're inside a function body, we still don't want to
9728 call expand_expr to calculate the size of a variable-sized array.
9729 We haven't necessarily assigned RTL to all variables yet, so it's
9730 not safe to try to expand expressions involving them. */
9731 cfun
->x_dont_save_pending_sizes_p
= 1;
9733 /* Start the statement-tree, start the tree now. */
9734 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
9736 /* Let the user know we're compiling this function. */
9737 announce_function (decl1
);
9739 /* Record the decl so that the function name is defined.
9740 If we already have a decl for this name, and it is a FUNCTION_DECL,
9741 use the old decl. */
9742 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
9744 /* A specialization is not used to guide overload resolution. */
9745 if (!DECL_FUNCTION_MEMBER_P (decl1
)
9746 && !(DECL_USE_TEMPLATE (decl1
) &&
9747 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
9749 tree olddecl
= pushdecl (decl1
);
9751 if (olddecl
== error_mark_node
)
9752 /* If something went wrong when registering the declaration,
9753 use DECL1; we have to have a FUNCTION_DECL to use when
9754 parsing the body of the function. */
9757 /* Otherwise, OLDDECL is either a previous declaration of
9758 the same function or DECL1 itself. */
9763 /* We need to set the DECL_CONTEXT. */
9764 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
9765 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
9766 /* And make sure we have enough default args. */
9767 check_default_args (decl1
);
9769 fntype
= TREE_TYPE (decl1
);
9772 /* Reset these in case the call to pushdecl changed them. */
9773 current_function_decl
= decl1
;
9776 /* If we are (erroneously) defining a function that we have already
9777 defined before, wipe out what we knew before. */
9778 if (!DECL_PENDING_INLINE_P (decl1
))
9779 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
9781 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
9783 /* We know that this was set up by `grokclassfn'. We do not
9784 wait until `store_parm_decls', since evil parse errors may
9785 never get us to that point. Here we keep the consistency
9786 between `current_class_type' and `current_class_ptr'. */
9787 tree t
= DECL_ARGUMENTS (decl1
);
9789 my_friendly_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
,
9791 my_friendly_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
,
9794 cp_function_chain
->x_current_class_ref
9795 = build_indirect_ref (t
, NULL
);
9796 cp_function_chain
->x_current_class_ptr
= t
;
9798 /* Constructors and destructors need to know whether they're "in
9799 charge" of initializing virtual base classes. */
9801 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
9803 current_in_charge_parm
= t
;
9806 if (DECL_HAS_VTT_PARM_P (decl1
))
9808 if (DECL_NAME (t
) != vtt_parm_identifier
)
9810 current_vtt_parm
= t
;
9814 if (DECL_INTERFACE_KNOWN (decl1
))
9816 tree ctx
= decl_function_context (decl1
);
9818 if (DECL_NOT_REALLY_EXTERN (decl1
))
9819 DECL_EXTERNAL (decl1
) = 0;
9821 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
9822 && TREE_PUBLIC (ctx
))
9823 /* This is a function in a local class in an extern inline
9825 comdat_linkage (decl1
);
9827 /* If this function belongs to an interface, it is public.
9828 If it belongs to someone else's interface, it is also external.
9829 This only affects inlines and template instantiations. */
9830 else if (interface_unknown
== 0
9831 && ! DECL_TEMPLATE_INSTANTIATION (decl1
))
9833 if (DECL_DECLARED_INLINE_P (decl1
)
9834 || DECL_TEMPLATE_INSTANTIATION (decl1
)
9835 || processing_template_decl
)
9837 DECL_EXTERNAL (decl1
)
9839 || (DECL_DECLARED_INLINE_P (decl1
)
9840 && ! flag_implement_inlines
9841 && !DECL_VINDEX (decl1
)));
9843 /* For WIN32 we also want to put these in linkonce sections. */
9844 maybe_make_one_only (decl1
);
9847 DECL_EXTERNAL (decl1
) = 0;
9848 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
9849 DECL_INTERFACE_KNOWN (decl1
) = 1;
9851 else if (interface_unknown
&& interface_only
9852 && ! DECL_TEMPLATE_INSTANTIATION (decl1
))
9854 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
9855 interface, we will have interface_only set but not
9856 interface_known. In that case, we don't want to use the normal
9857 heuristics because someone will supply a #pragma implementation
9858 elsewhere, and deducing it here would produce a conflict. */
9859 comdat_linkage (decl1
);
9860 DECL_EXTERNAL (decl1
) = 0;
9861 DECL_INTERFACE_KNOWN (decl1
) = 1;
9862 DECL_DEFER_OUTPUT (decl1
) = 1;
9866 /* This is a definition, not a reference.
9867 So clear DECL_EXTERNAL. */
9868 DECL_EXTERNAL (decl1
) = 0;
9870 if ((DECL_DECLARED_INLINE_P (decl1
)
9871 || DECL_TEMPLATE_INSTANTIATION (decl1
))
9872 && ! DECL_INTERFACE_KNOWN (decl1
)
9873 /* Don't try to defer nested functions for now. */
9874 && ! decl_function_context (decl1
))
9875 DECL_DEFER_OUTPUT (decl1
) = 1;
9877 DECL_INTERFACE_KNOWN (decl1
) = 1;
9880 begin_scope (sk_function_parms
, decl1
);
9884 if (DECL_DESTRUCTOR_P (decl1
))
9886 dtor_label
= build_decl (LABEL_DECL
, NULL_TREE
, NULL_TREE
);
9887 DECL_CONTEXT (dtor_label
) = current_function_decl
;
9890 start_fname_decls ();
9892 store_parm_decls (current_function_parms
);
9896 /* Like start_preparsed_function, except that instead of a
9897 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
9899 Returns 1 on success. If the DECLARATOR is not suitable for a function
9900 (it defines a datum instead), we return 0, which tells
9901 yyparse to report a parse error. */
9904 start_function (cp_decl_specifier_seq
*declspecs
,
9905 const cp_declarator
*declarator
,
9910 if (have_extern_spec
)
9912 declspecs
->storage_class
= sc_extern
;
9913 /* This should only be done once on the outermost decl. */
9914 have_extern_spec
= false;
9917 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
9918 /* If the declarator is not suitable for a function definition,
9919 cause a syntax error. */
9920 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
9923 cplus_decl_attributes (&decl1
, attrs
, 0);
9925 /* If #pragma weak was used, mark the decl weak now. */
9926 if (global_scope_p (current_binding_level
))
9927 maybe_apply_pragma_weak (decl1
);
9929 if (DECL_MAIN_P (decl1
))
9931 /* If this doesn't return integer_type, or a typedef to
9932 integer_type, complain. */
9933 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl1
)), integer_type_node
))
9935 if (pedantic
|| warn_return_type
)
9936 pedwarn ("return type for `main' changed to `int'");
9937 TREE_TYPE (decl1
) = default_function_type
;
9941 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
9946 /* Store the parameter declarations into the current function declaration.
9947 This is called after parsing the parameter declarations, before
9948 digesting the body of the function.
9950 Also install to binding contour return value identifier, if any. */
9953 store_parm_decls (tree current_function_parms
)
9955 tree fndecl
= current_function_decl
;
9958 /* This is a chain of any other decls that came in among the parm
9959 declarations. If a parm is declared with enum {foo, bar} x;
9960 then CONST_DECLs for foo and bar are put here. */
9961 tree nonparms
= NULL_TREE
;
9963 if (current_function_parms
)
9965 /* This case is when the function was defined with an ANSI prototype.
9966 The parms already have decls, so we need not do anything here
9967 except record them as in effect
9968 and complain if any redundant old-style parm decls were written. */
9970 tree specparms
= current_function_parms
;
9973 /* Must clear this because it might contain TYPE_DECLs declared
9975 current_binding_level
->names
= NULL
;
9977 /* If we're doing semantic analysis, then we'll call pushdecl
9978 for each of these. We must do them in reverse order so that
9979 they end in the correct forward order. */
9980 specparms
= nreverse (specparms
);
9982 for (parm
= specparms
; parm
; parm
= next
)
9984 next
= TREE_CHAIN (parm
);
9985 if (TREE_CODE (parm
) == PARM_DECL
)
9987 if (DECL_NAME (parm
) == NULL_TREE
9988 || TREE_CODE (parm
) != VOID_TYPE
)
9991 error ("parameter `%D' declared void", parm
);
9995 /* If we find an enum constant or a type tag,
9996 put it aside for the moment. */
9997 TREE_CHAIN (parm
) = NULL_TREE
;
9998 nonparms
= chainon (nonparms
, parm
);
10002 /* Get the decls in their original chain order and record in the
10003 function. This is all and only the PARM_DECLs that were
10004 pushed into scope by the loop above. */
10005 DECL_ARGUMENTS (fndecl
) = getdecls ();
10008 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
10010 /* Now store the final chain of decls for the arguments
10011 as the decl-chain of the current lexical scope.
10012 Put the enumerators in as well, at the front so that
10013 DECL_ARGUMENTS is not modified. */
10014 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
10016 /* Do the starting of the exception specifications, if we have any. */
10017 if (flag_exceptions
&& !processing_template_decl
10018 && flag_enforce_eh_specs
10019 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
10020 current_eh_spec_block
= begin_eh_spec_block ();
10024 /* We have finished doing semantic analysis on DECL, but have not yet
10025 generated RTL for its body. Save away our current state, so that
10026 when we want to generate RTL later we know what to do. */
10029 save_function_data (tree decl
)
10031 struct language_function
*f
;
10033 /* Save the language-specific per-function data so that we can
10034 get it back when we really expand this function. */
10035 my_friendly_assert (!DECL_PENDING_INLINE_P (decl
),
10039 f
= ggc_alloc (sizeof (struct language_function
));
10040 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
10041 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
10043 /* Clear out the bits we don't need. */
10044 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL_TREE
;
10045 f
->x_named_label_uses
= NULL
;
10046 f
->bindings
= NULL
;
10047 f
->x_local_names
= NULL
;
10050 /* Add a note to mark the beginning of the main body of the constructor.
10051 This is used to set up the data structures for the cleanup regions for
10052 fully-constructed bases and members. */
10055 begin_constructor_body (void)
10059 /* Add a note to mark the end of the main body of the constructor. This is
10060 used to end the cleanup regions for fully-constructed bases and
10064 finish_constructor_body (void)
10068 /* Do all the processing for the beginning of a destructor; set up the
10069 vtable pointers and cleanups for bases and members. */
10072 begin_destructor_body (void)
10075 tree compound_stmt
;
10077 /* If the dtor is empty, and we know there is not any possible
10078 way we could use any vtable entries, before they are possibly
10079 set by a base class dtor, we don't have to setup the vtables,
10080 as we know that any base class dtor will set up any vtables
10081 it needs. We avoid MI, because one base class dtor can do a
10082 virtual dispatch to an overridden function that would need to
10083 have a non-related vtable set up, we cannot avoid setting up
10084 vtables in that case. We could change this to see if there
10085 is just one vtable.
10087 ??? In the destructor for a class, the vtables are set
10088 appropriately for that class. There will be no non-related
10089 vtables. jason 2001-12-11. */
10090 if_stmt
= begin_if_stmt ();
10092 /* If it is not safe to avoid setting up the vtables, then
10093 someone will change the condition to be boolean_true_node.
10094 (Actually, for now, we do not have code to set the condition
10095 appropriately, so we just assume that we always need to
10096 initialize the vtables.) */
10097 finish_if_stmt_cond (boolean_true_node
, if_stmt
);
10099 compound_stmt
= begin_compound_stmt (0);
10101 /* Make all virtual function table pointers in non-virtual base
10102 classes point to CURRENT_CLASS_TYPE's virtual function
10104 initialize_vtbl_ptrs (current_class_ptr
);
10106 finish_compound_stmt (compound_stmt
);
10107 finish_then_clause (if_stmt
);
10108 finish_if_stmt (if_stmt
);
10110 /* And insert cleanups for our bases and members so that they
10111 will be properly destroyed if we throw. */
10112 push_base_cleanups ();
10115 /* At the end of every destructor we generate code to delete the object if
10116 necessary. Do that now. */
10119 finish_destructor_body (void)
10123 /* Any return from a destructor will end up here; that way all base
10124 and member cleanups will be run when the function returns. */
10125 add_stmt (build_stmt (LABEL_EXPR
, dtor_label
));
10127 /* In a virtual destructor, we must call delete. */
10128 if (DECL_VIRTUAL_P (current_function_decl
))
10131 tree virtual_size
= cxx_sizeof (current_class_type
);
10135 At the point of definition of a virtual destructor (including
10136 an implicit definition), non-placement operator delete shall
10137 be looked up in the scope of the destructor's class and if
10138 found shall be accessible and unambiguous. */
10139 exprstmt
= build_op_delete_call
10140 (DELETE_EXPR
, current_class_ptr
, virtual_size
,
10141 /*global_p=*/false, NULL_TREE
);
10143 if_stmt
= begin_if_stmt ();
10144 finish_if_stmt_cond (build (BIT_AND_EXPR
, integer_type_node
,
10145 current_in_charge_parm
,
10148 finish_expr_stmt (exprstmt
);
10149 finish_then_clause (if_stmt
);
10150 finish_if_stmt (if_stmt
);
10154 /* Do the necessary processing for the beginning of a function body, which
10155 in this case includes member-initializers, but not the catch clauses of
10156 a function-try-block. Currently, this means opening a binding level
10157 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10158 In other functions, this isn't necessary, but it doesn't hurt. */
10161 begin_function_body (void)
10165 if (processing_template_decl
)
10166 /* Do nothing now. */;
10168 /* Always keep the BLOCK node associated with the outermost pair of
10169 curly braces of a function. These are needed for correct
10170 operation of dwarfout.c. */
10171 keep_next_level (true);
10173 stmt
= begin_compound_stmt (BCS_FN_BODY
);
10175 if (processing_template_decl
)
10176 /* Do nothing now. */;
10177 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
10178 begin_constructor_body ();
10179 else if (DECL_DESTRUCTOR_P (current_function_decl
))
10180 begin_destructor_body ();
10185 /* Do the processing for the end of a function body. Currently, this means
10186 closing out the cleanups for fully-constructed bases and members, and in
10187 the case of the destructor, deleting the object if desired. Again, this
10188 is only meaningful for [cd]tors, since they are the only functions where
10189 there is a significant distinction between the main body and any
10190 function catch clauses. Handling, say, main() return semantics here
10191 would be wrong, as flowing off the end of a function catch clause for
10192 main() would also need to return 0. */
10195 finish_function_body (tree compstmt
)
10197 /* Close the block. */
10198 finish_compound_stmt (compstmt
);
10200 if (processing_template_decl
)
10201 /* Do nothing now. */;
10202 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
10203 finish_constructor_body ();
10204 else if (DECL_DESTRUCTOR_P (current_function_decl
))
10205 finish_destructor_body ();
10208 /* Finish up a function declaration and compile that function
10209 all the way to assembler language output. The free the storage
10210 for the function definition.
10212 FLAGS is a bitwise or of the following values:
10214 We just finished processing the body of an in-class inline
10215 function definition. (This processing will have taken place
10216 after the class definition is complete.) */
10219 finish_function (int flags
)
10221 tree fndecl
= current_function_decl
;
10222 tree fntype
, ctype
= NULL_TREE
;
10223 int inclass_inline
= (flags
& 2) != 0;
10226 /* When we get some parse errors, we can end up without a
10227 current_function_decl, so cope. */
10228 if (fndecl
== NULL_TREE
)
10229 return error_mark_node
;
10231 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
10232 && DECL_VIRTUAL_P (fndecl
)
10233 && !processing_template_decl
)
10235 tree fnclass
= DECL_CONTEXT (fndecl
);
10236 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
10237 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
10240 nested
= function_depth
> 1;
10241 fntype
= TREE_TYPE (fndecl
);
10243 /* TREE_READONLY (fndecl) = 1;
10244 This caused &foo to be of type ptr-to-const-function
10245 which then got a warning when stored in a ptr-to-function variable. */
10247 my_friendly_assert (building_stmt_tree (), 20000911);
10249 /* For a cloned function, we've already got all the code we need;
10250 there's no need to add any extra bits. */
10251 if (!DECL_CLONED_FUNCTION_P (fndecl
))
10253 if (DECL_MAIN_P (current_function_decl
))
10255 /* Make it so that `main' always returns 0 by default. */
10257 finish_return_stmt (integer_one_node
);
10259 finish_return_stmt (integer_zero_node
);
10263 /* Finish dealing with exception specifiers. */
10264 if (flag_exceptions
&& !processing_template_decl
10265 && flag_enforce_eh_specs
10266 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl
)))
10267 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10268 (TREE_TYPE (current_function_decl
)),
10269 current_eh_spec_block
);
10272 /* If we're saving up tree structure, tie off the function now. */
10273 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
10275 finish_fname_decls ();
10277 /* If this function can't throw any exceptions, remember that. */
10278 if (!processing_template_decl
10279 && !cp_function_chain
->can_throw
10280 && !flag_non_call_exceptions
)
10281 TREE_NOTHROW (fndecl
) = 1;
10283 /* This must come after expand_function_end because cleanups might
10284 have declarations (from inline functions) that need to go into
10285 this function's blocks. */
10287 /* If the current binding level isn't the outermost binding level
10288 for this function, either there is a bug, or we have experienced
10289 syntax errors and the statement tree is malformed. */
10290 if (current_binding_level
->kind
!= sk_function_parms
)
10292 /* Make sure we have already experienced errors. */
10293 if (errorcount
== 0)
10296 /* Throw away the broken statement tree and extra binding
10298 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
10300 while (current_binding_level
->kind
!= sk_function_parms
)
10302 if (current_binding_level
->kind
== sk_class
)
10303 pop_nested_class ();
10305 poplevel (0, 0, 0);
10308 poplevel (1, 0, 1);
10310 /* Statements should always be full-expressions at the outermost set
10311 of curly braces for a function. */
10312 my_friendly_assert (stmts_are_full_exprs_p (), 19990831);
10314 /* Set up the named return value optimization, if we can. Candidate
10315 variables are selected in check_return_value. */
10316 if (current_function_return_value
)
10318 tree r
= current_function_return_value
;
10321 if (r
!= error_mark_node
10322 /* This is only worth doing for fns that return in memory--and
10323 simpler, since we don't have to worry about promoted modes. */
10324 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
10325 /* Only allow this for variables declared in the outer scope of
10326 the function so we know that their lifetime always ends with a
10327 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10328 we were to do this optimization in tree-ssa. */
10329 && (outer
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
)))
10330 /* Skip the artificial function body block. */
10331 && (outer
= BLOCK_SUBBLOCKS (outer
))
10332 && chain_member (r
, BLOCK_VARS (outer
)))
10333 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
10335 current_function_return_value
= NULL_TREE
;
10338 /* Remember that we were in class scope. */
10339 if (current_class_name
)
10340 ctype
= current_class_type
;
10342 /* Must mark the RESULT_DECL as being in this function. */
10343 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
10345 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10346 to the FUNCTION_DECL node itself. */
10347 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
10349 /* Save away current state, if appropriate. */
10350 if (!processing_template_decl
)
10351 save_function_data (fndecl
);
10353 /* Complain if there's just no return statement. */
10354 if (warn_return_type
10355 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
10356 && !dependent_type_p (TREE_TYPE (fntype
))
10357 && !current_function_returns_value
&& !current_function_returns_null
10358 /* Don't complain if we abort or throw. */
10359 && !current_function_returns_abnormally
10360 && !DECL_NAME (DECL_RESULT (fndecl
)))
10362 /* Enable this for all functions until bug 14107 is fixed properly. */
10363 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10364 inline function, as we might never be compiled separately. */
10365 && (DECL_INLINE (fndecl
) || processing_template_decl
))
10367 warning ("no return statement in function returning non-void");
10369 /* Store the end of the function, so that we get good line number
10370 info for the epilogue. */
10371 cfun
->function_end_locus
= input_location
;
10373 /* Genericize before inlining. */
10374 if (!processing_template_decl
)
10376 cp_genericize (fndecl
);
10378 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10379 c_warn_unused_result (&DECL_SAVED_TREE (fndecl
));
10382 /* We're leaving the context of this function, so zap cfun. It's still in
10383 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10385 current_function_decl
= NULL
;
10387 /* If this is an in-class inline definition, we may have to pop the
10388 bindings for the template parameters that we added in
10389 maybe_begin_member_template_processing when start_function was
10391 if (inclass_inline
)
10392 maybe_end_member_template_processing ();
10394 /* Leave the scope of the class. */
10396 pop_nested_class ();
10402 /* Let the error reporting routines know that we're outside a
10403 function. For a nested function, this value is used in
10404 cxx_pop_function_context and then reset via pop_function_context. */
10405 current_function_decl
= NULL_TREE
;
10410 /* Create the FUNCTION_DECL for a function definition.
10411 DECLSPECS and DECLARATOR are the parts of the declaration;
10412 they describe the return type and the name of the function,
10413 but twisted together in a fashion that parallels the syntax of C.
10415 This function creates a binding context for the function body
10416 as well as setting up the FUNCTION_DECL in current_function_decl.
10418 Returns a FUNCTION_DECL on success.
10420 If the DECLARATOR is not suitable for a function (it defines a datum
10421 instead), we return 0, which tells yyparse to report a parse error.
10423 May return void_type_node indicating that this method is actually
10424 a friend. See grokfield for more details.
10426 Came here with a `.pushlevel' .
10428 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10429 CHANGES TO CODE IN `grokfield'. */
10432 start_method (cp_decl_specifier_seq
*declspecs
,
10433 const cp_declarator
*declarator
, tree attrlist
)
10435 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
10438 if (fndecl
== error_mark_node
)
10439 return error_mark_node
;
10441 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
10443 error ("invalid member function declaration");
10444 return error_mark_node
;
10448 cplus_decl_attributes (&fndecl
, attrlist
, 0);
10450 /* Pass friends other than inline friend functions back. */
10451 if (fndecl
== void_type_node
)
10454 if (DECL_IN_AGGR_P (fndecl
))
10456 if (DECL_CONTEXT (fndecl
)
10457 && TREE_CODE( DECL_CONTEXT (fndecl
)) != NAMESPACE_DECL
)
10458 error ("`%D' is already defined in class `%T'", fndecl
,
10459 DECL_CONTEXT (fndecl
));
10460 return void_type_node
;
10463 check_template_shadow (fndecl
);
10465 DECL_DECLARED_INLINE_P (fndecl
) = 1;
10466 if (flag_default_inline
)
10467 DECL_INLINE (fndecl
) = 1;
10469 /* We process method specializations in finish_struct_1. */
10470 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
10472 fndecl
= push_template_decl (fndecl
);
10473 if (fndecl
== error_mark_node
)
10477 if (! DECL_FRIEND_P (fndecl
))
10479 if (TREE_CHAIN (fndecl
))
10481 fndecl
= copy_node (fndecl
);
10482 TREE_CHAIN (fndecl
) = NULL_TREE
;
10484 grok_special_member_properties (fndecl
);
10487 cp_finish_decl (fndecl
, NULL_TREE
, NULL_TREE
, 0);
10489 /* Make a place for the parms. */
10490 begin_scope (sk_function_parms
, fndecl
);
10492 DECL_IN_AGGR_P (fndecl
) = 1;
10496 /* Go through the motions of finishing a function definition.
10497 We don't compile this method until after the whole class has
10500 FINISH_METHOD must return something that looks as though it
10501 came from GROKFIELD (since we are defining a method, after all).
10503 This is called after parsing the body of the function definition.
10504 STMTS is the chain of statements that makes up the function body.
10506 DECL is the ..._DECL that `start_method' provided. */
10509 finish_method (tree decl
)
10511 tree fndecl
= decl
;
10516 if (decl
== void_type_node
)
10519 old_initial
= DECL_INITIAL (fndecl
);
10521 /* Undo the level for the parms (from start_method).
10522 This is like poplevel, but it causes nothing to be
10523 saved. Saving information here confuses symbol-table
10524 output routines. Besides, this information will
10525 be correctly output when this method is actually
10528 /* Clear out the meanings of the local variables of this level;
10529 also record in each decl which block it belongs to. */
10531 for (link
= current_binding_level
->names
; link
; link
= TREE_CHAIN (link
))
10533 if (DECL_NAME (link
) != NULL_TREE
)
10534 pop_binding (DECL_NAME (link
), link
);
10535 my_friendly_assert (TREE_CODE (link
) != FUNCTION_DECL
, 163);
10536 DECL_CONTEXT (link
) = NULL_TREE
;
10539 poplevel (0, 0, 0);
10541 DECL_INITIAL (fndecl
) = old_initial
;
10543 /* We used to check if the context of FNDECL was different from
10544 current_class_type as another way to get inside here. This didn't work
10545 for String.cc in libg++. */
10546 if (DECL_FRIEND_P (fndecl
))
10548 CLASSTYPE_INLINE_FRIENDS (current_class_type
)
10549 = tree_cons (NULL_TREE
, fndecl
, CLASSTYPE_INLINE_FRIENDS (current_class_type
));
10550 decl
= void_type_node
;
10557 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10558 we can lay it out later, when and if its type becomes complete. */
10561 maybe_register_incomplete_var (tree var
)
10563 my_friendly_assert (TREE_CODE (var
) == VAR_DECL
, 20020406);
10565 /* Keep track of variables with incomplete types. */
10566 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
10567 && DECL_EXTERNAL (var
))
10569 tree inner_type
= TREE_TYPE (var
);
10571 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
10572 inner_type
= TREE_TYPE (inner_type
);
10573 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
10575 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
10576 /* RTTI TD entries are created while defining the type_info. */
10577 || (TYPE_LANG_SPECIFIC (inner_type
)
10578 && TYPE_BEING_DEFINED (inner_type
)))
10579 incomplete_vars
= tree_cons (inner_type
, var
, incomplete_vars
);
10583 /* Called when a class type (given by TYPE) is defined. If there are
10584 any existing VAR_DECLs whose type hsa been completed by this
10585 declaration, update them now. */
10588 complete_vars (tree type
)
10590 tree
*list
= &incomplete_vars
;
10592 my_friendly_assert (CLASS_TYPE_P (type
), 20020406);
10595 if (same_type_p (type
, TREE_PURPOSE (*list
)))
10597 tree var
= TREE_VALUE (*list
);
10598 /* Complete the type of the variable. The VAR_DECL itself
10599 will be laid out in expand_expr. */
10600 complete_type (TREE_TYPE (var
));
10601 /* Remove this entry from the list. */
10602 *list
= TREE_CHAIN (*list
);
10605 list
= &TREE_CHAIN (*list
);
10609 /* If DECL is of a type which needs a cleanup, build that cleanup
10613 cxx_maybe_build_cleanup (tree decl
)
10615 tree type
= TREE_TYPE (decl
);
10617 if (type
!= error_mark_node
&& TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
10619 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
10622 if (TREE_CODE (type
) == ARRAY_TYPE
)
10626 cxx_mark_addressable (decl
);
10627 rval
= build_unary_op (ADDR_EXPR
, decl
, 0);
10630 /* Optimize for space over speed here. */
10631 if (! TYPE_USES_VIRTUAL_BASECLASSES (type
)
10632 || flag_expensive_optimizations
)
10633 flags
|= LOOKUP_NONVIRTUAL
;
10635 rval
= build_delete (TREE_TYPE (rval
), rval
,
10636 sfk_complete_destructor
, flags
, 0);
10638 if (TYPE_USES_VIRTUAL_BASECLASSES (type
)
10639 && ! TYPE_HAS_DESTRUCTOR (type
))
10640 rval
= build_compound_expr (rval
, build_vbase_delete (type
, decl
));
10647 /* When a stmt has been parsed, this function is called. */
10654 /* DECL was originally constructed as a non-static member function,
10655 but turned out to be static. Update it accordingly. */
10658 revert_static_member_fn (tree decl
)
10661 tree function
= TREE_TYPE (decl
);
10662 tree args
= TYPE_ARG_TYPES (function
);
10664 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args
)))
10665 != TYPE_UNQUALIFIED
)
10666 error ("static member function `%#D' declared with type qualifiers",
10669 args
= TREE_CHAIN (args
);
10670 tmp
= build_function_type (TREE_TYPE (function
), args
);
10671 tmp
= build_qualified_type (tmp
, cp_type_quals (function
));
10672 tmp
= build_exception_variant (tmp
,
10673 TYPE_RAISES_EXCEPTIONS (function
));
10674 TREE_TYPE (decl
) = tmp
;
10675 if (DECL_ARGUMENTS (decl
))
10676 DECL_ARGUMENTS (decl
) = TREE_CHAIN (DECL_ARGUMENTS (decl
));
10677 DECL_STATIC_FUNCTION_P (decl
) = 1;
10680 /* Initialize the variables used during compilation of a C++
10684 cxx_push_function_context (struct function
* f
)
10686 struct language_function
*p
10687 = ggc_alloc_cleared (sizeof (struct language_function
));
10690 /* Whenever we start a new function, we destroy temporaries in the
10692 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
10698 if (DECL_SAVED_FUNCTION_DATA (fn
))
10700 /* If we already parsed this function, and we're just expanding it
10701 now, restore saved state. */
10702 *cp_function_chain
= *DECL_SAVED_FUNCTION_DATA (fn
);
10704 /* We don't need the saved data anymore. Unless this is an inline
10705 function; we need the named return value info for
10706 cp_copy_res_decl_for_inlining. */
10707 if (! DECL_INLINE (fn
))
10708 DECL_SAVED_FUNCTION_DATA (fn
) = NULL
;
10713 /* Free the language-specific parts of F, now that we've finished
10714 compiling the function. */
10717 cxx_pop_function_context (struct function
* f
)
10722 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
10723 one of the language-independent trees. */
10725 enum cp_tree_node_structure_enum
10726 cp_tree_node_structure (union lang_tree_node
* t
)
10728 switch (TREE_CODE (&t
->generic
))
10730 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
10731 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
10732 case OVERLOAD
: return TS_CP_OVERLOAD
;
10733 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
10734 case PTRMEM_CST
: return TS_CP_PTRMEM
;
10735 case BASELINK
: return TS_CP_BASELINK
;
10736 default: return TS_CP_GENERIC
;
10740 /* Build the void_list_node (void_type_node having been created). */
10742 build_void_list_node (void)
10744 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
10749 cp_missing_noreturn_ok_p (tree decl
)
10751 /* A missing noreturn is ok for the `main' function. */
10752 return DECL_MAIN_P (decl
);
10755 #include "gt-cp-decl.h"
10756 #include "gtype-cp.h"