1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
38 #include "tree-iterator.h"
39 #include "tree-inline.h"
48 #include "c-family/c-common.h"
49 #include "c-family/c-pragma.h"
50 #include "diagnostic.h"
54 #include "tree-flow.h"
55 #include "pointer-set.h"
56 #include "splay-tree.h"
59 static tree
grokparms (tree parmlist
, tree
*);
60 static const char *redeclaration_error_message (tree
, tree
);
62 static int decl_jump_unsafe (tree
);
63 static void require_complete_types_for_parms (tree
);
64 static int ambi_op_p (enum tree_code
);
65 static int unary_op_p (enum tree_code
);
66 static void push_local_name (tree
);
67 static tree
grok_reference_init (tree
, tree
, tree
, tree
*);
68 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
70 static void record_unknown_type (tree
, const char *);
71 static tree
builtin_function_1 (tree
, tree
, bool);
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
);
82 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
83 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
84 static void maybe_deduce_size_from_array_init (tree
, tree
);
85 static void layout_var_decl (tree
);
86 static tree
check_initializer (tree
, tree
, int, tree
*);
87 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
88 static void save_function_data (tree
);
89 static void check_function_type (tree
, tree
);
90 static void finish_constructor_body (void);
91 static void begin_destructor_body (void);
92 static void finish_destructor_body (void);
93 static tree
create_array_type_for_decl (tree
, tree
, tree
);
94 static tree
get_atexit_node (void);
95 static tree
get_dso_handle_node (void);
96 static tree
start_cleanup_fn (void);
97 static void end_cleanup_fn (void);
98 static tree
cp_make_fname_decl (location_t
, tree
, int);
99 static void initialize_predefined_identifiers (void);
100 static tree check_special_function_return_type
101 (special_function_kind
, tree
, tree
);
102 static tree
push_cp_library_fn (enum tree_code
, tree
);
103 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
104 static void store_parm_decls (tree
);
105 static void initialize_local_var (tree
, tree
);
106 static void expand_static_init (tree
, tree
);
108 /* The following symbols are subsumed in the cp_global_trees array, and
109 listed here individually for documentation purposes.
112 tree wchar_decl_node;
114 tree vtable_entry_type;
115 tree delta_type_node;
116 tree __t_desc_type_node;
118 tree class_type_node;
119 tree unknown_type_node;
121 Array type `vtable_entry_type[]'
124 tree vtbl_ptr_type_node;
131 A FUNCTION_DECL which can call `abort'. Not necessarily the
132 one that the user will declare, but sufficient to be called
133 by routines that want to abort the program.
137 The FUNCTION_DECL for the default `::operator delete'.
139 tree global_delete_fndecl;
142 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
143 tree tinfo_var_id; */
145 tree cp_global_trees
[CPTI_MAX
];
147 /* Indicates that there is a type value in some namespace, although
148 that is not necessarily in scope at the moment. */
150 tree global_type_node
;
152 /* The node that holds the "name" of the global scope. */
153 tree global_scope_name
;
155 #define local_names cp_function_chain->x_local_names
157 /* A list of objects which have constructors or destructors
158 which reside in the global scope. The decl is stored in
159 the TREE_VALUE slot and the initializer is stored
160 in the TREE_PURPOSE slot. */
161 tree static_aggregates
;
165 /* A node for the integer constants 2, and 3. */
167 tree integer_two_node
, integer_three_node
;
169 /* Used only for jumps to as-yet undefined labels, since jumps to
170 defined labels can have their validity checked immediately. */
172 struct GTY(()) named_label_use_entry
{
173 struct named_label_use_entry
*next
;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level
*binding_level
;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus
;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct GTY(()) named_label_entry
{
195 /* The decl itself. */
198 /* The binding level to which the label is *currently* attached.
199 This is initially set to the binding level in which the label
200 is defined, but is modified as scopes are closed. */
201 struct cp_binding_level
*binding_level
;
202 /* The head of the names list that was current when the label was
203 defined, or the inner scope popped. These are the decls that will
204 be skipped when jumping to the label. */
206 /* A tree list of all decls from all binding levels that would be
207 crossed by a backward branch to the label. */
210 /* A list of uses of the label, before the label is defined. */
211 struct named_label_use_entry
*uses
;
213 /* The following bits are set after the label is defined, and are
214 updated as scopes are popped. They indicate that a backward jump
215 to the label will illegally enter a scope of the given flavor. */
221 #define named_labels cp_function_chain->x_named_labels
223 /* The number of function bodies which we are currently processing.
224 (Zero if we are at namespace scope, one inside the body of a
225 function, two inside the body of a function in a local class, etc.) */
228 /* To avoid unwanted recursion, finish_function defers all mark_used calls
229 encountered during its execution until it finishes. */
230 bool defer_mark_used_calls
;
231 VEC(tree
, gc
) *deferred_mark_used_calls
;
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
237 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
240 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
241 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
242 time the VAR_DECL was declared, the type was incomplete. */
244 static GTY(()) tree incomplete_vars
;
246 /* Returns the kind of template specialization we are currently
247 processing, given that it's declaration contained N_CLASS_SCOPES
248 explicit scope qualifications. */
251 current_tmpl_spec_kind (int n_class_scopes
)
253 int n_template_parm_scopes
= 0;
254 int seen_specialization_p
= 0;
255 int innermost_specialization_p
= 0;
256 struct cp_binding_level
*b
;
258 /* Scan through the template parameter scopes. */
259 for (b
= current_binding_level
;
260 b
->kind
== sk_template_parms
;
263 /* If we see a specialization scope inside a parameter scope,
264 then something is wrong. That corresponds to a declaration
267 template <class T> template <> ...
269 which is always invalid since [temp.expl.spec] forbids the
270 specialization of a class member template if the enclosing
271 class templates are not explicitly specialized as well. */
272 if (b
->explicit_spec_p
)
274 if (n_template_parm_scopes
== 0)
275 innermost_specialization_p
= 1;
277 seen_specialization_p
= 1;
279 else if (seen_specialization_p
== 1)
280 return tsk_invalid_member_spec
;
282 ++n_template_parm_scopes
;
285 /* Handle explicit instantiations. */
286 if (processing_explicit_instantiation
)
288 if (n_template_parm_scopes
!= 0)
289 /* We've seen a template parameter list during an explicit
290 instantiation. For example:
292 template <class T> template void f(int);
294 This is erroneous. */
295 return tsk_invalid_expl_inst
;
297 return tsk_expl_inst
;
300 if (n_template_parm_scopes
< n_class_scopes
)
301 /* We've not seen enough template headers to match all the
302 specialized classes present. For example:
304 template <class T> void R<T>::S<T>::f(int);
306 This is invalid; there needs to be one set of template
307 parameters for each class. */
308 return tsk_insufficient_parms
;
309 else if (n_template_parm_scopes
== n_class_scopes
)
310 /* We're processing a non-template declaration (even though it may
311 be a member of a template class.) For example:
313 template <class T> void S<T>::f(int);
315 The `class T' matches the `S<T>', leaving no template headers
316 corresponding to the `f'. */
318 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
319 /* We've got too many template headers. For example:
321 template <> template <class T> void f (T);
323 There need to be more enclosing classes. */
324 return tsk_excessive_parms
;
326 /* This must be a template. It's of the form:
328 template <class T> template <class U> void S<T>::f(U);
330 This is a specialization if the innermost level was a
331 specialization; otherwise it's just a definition of the
333 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
336 /* Exit the current scope. */
344 /* When a label goes out of scope, check to see if that label was used
345 in a valid manner, and issue any appropriate warnings or errors. */
348 pop_label (tree label
, tree old_value
)
350 if (!processing_template_decl
)
352 if (DECL_INITIAL (label
) == NULL_TREE
)
356 error ("label %q+D used but not defined", label
);
357 location
= input_location
; /* FIXME want (input_filename, (line)0) */
358 /* Avoid crashing later. */
359 define_label (location
, DECL_NAME (label
));
362 warn_for_unused_label (label
);
365 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
368 /* At the end of a function, all labels declared within the function
369 go out of scope. BLOCK is the top-level block for the
373 pop_labels_1 (void **slot
, void *data
)
375 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
376 tree block
= (tree
) data
;
378 pop_label (ent
->label_decl
, NULL_TREE
);
380 /* Put the labels into the "variables" of the top-level block,
381 so debugger can see them. */
382 TREE_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
383 BLOCK_VARS (block
) = ent
->label_decl
;
385 htab_clear_slot (named_labels
, slot
);
391 pop_labels (tree block
)
395 htab_traverse (named_labels
, pop_labels_1
, block
);
400 /* At the end of a block with local labels, restore the outer definition. */
403 pop_local_label (tree label
, tree old_value
)
405 struct named_label_entry dummy
;
408 pop_label (label
, old_value
);
410 dummy
.label_decl
= label
;
411 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
412 htab_clear_slot (named_labels
, slot
);
415 /* The following two routines are used to interface to Objective-C++.
416 The binding level is purposely treated as an opaque type. */
419 objc_get_current_scope (void)
421 return current_binding_level
;
424 /* The following routine is used by the NeXT-style SJLJ exceptions;
425 variables get marked 'volatile' so as to not be clobbered by
426 _setjmp()/_longjmp() calls. All variables in the current scope,
427 as well as parent scopes up to (but not including) ENCLOSING_BLK
428 shall be thusly marked. */
431 objc_mark_locals_volatile (void *enclosing_blk
)
433 struct cp_binding_level
*scope
;
435 for (scope
= current_binding_level
;
436 scope
&& scope
!= enclosing_blk
;
437 scope
= scope
->level_chain
)
441 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
442 objc_volatilize_decl (decl
);
444 /* Do not climb up past the current function. */
445 if (scope
->kind
== sk_function_parms
)
450 /* Update data for defined and undefined labels when leaving a scope. */
453 poplevel_named_label_1 (void **slot
, void *data
)
455 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
456 struct cp_binding_level
*bl
= (struct cp_binding_level
*) data
;
457 struct cp_binding_level
*obl
= bl
->level_chain
;
459 if (ent
->binding_level
== bl
)
463 for (decl
= ent
->names_in_scope
; decl
; decl
= TREE_CHAIN (decl
))
464 if (decl_jump_unsafe (decl
))
465 ent
->bad_decls
= tree_cons (NULL
, decl
, ent
->bad_decls
);
467 ent
->binding_level
= obl
;
468 ent
->names_in_scope
= obl
->names
;
472 ent
->in_try_scope
= true;
475 ent
->in_catch_scope
= true;
478 ent
->in_omp_scope
= true;
486 struct named_label_use_entry
*use
;
488 for (use
= ent
->uses
; use
; use
= use
->next
)
489 if (use
->binding_level
== bl
)
491 use
->binding_level
= obl
;
492 use
->names_in_scope
= obl
->names
;
493 if (bl
->kind
== sk_omp
)
494 use
->in_omp_scope
= true;
501 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
502 when errors were reported, except for -Werror-unused-but-set-*. */
503 static int unused_but_set_errorcount
;
505 /* Exit a binding level.
506 Pop the level off, and restore the state of the identifier-decl mappings
507 that were in effect when this level was entered.
509 If KEEP == 1, this level had explicit declarations, so
510 and create a "block" (a BLOCK node) for the level
511 to record its declarations and subblocks for symbol table output.
513 If FUNCTIONBODY is nonzero, this level is the body of a function,
514 so create a block as if KEEP were set and also clear out all
517 If REVERSE is nonzero, reverse the order of decls before putting
518 them into the BLOCK. */
521 poplevel (int keep
, int reverse
, int functionbody
)
524 /* The chain of decls was accumulated in reverse order.
525 Put it into forward order, just for cleanliness. */
530 int leaving_for_scope
;
533 timevar_push (TV_NAME_LOOKUP
);
538 gcc_assert (current_binding_level
->kind
!= sk_class
);
540 if (current_binding_level
->kind
== sk_cleanup
)
542 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
544 gcc_assert (!VEC_length(cp_class_binding
,
545 current_binding_level
->class_shadowed
));
547 /* We used to use KEEP == 2 to indicate that the new block should go
548 at the beginning of the list of blocks at this binding level,
549 rather than the end. This hack is no longer used. */
550 gcc_assert (keep
== 0 || keep
== 1);
552 if (current_binding_level
->keep
)
555 /* Any uses of undefined labels, and any defined labels, now operate
556 under constraints of next binding contour. */
557 if (cfun
&& !functionbody
&& named_labels
)
558 htab_traverse (named_labels
, poplevel_named_label_1
,
559 current_binding_level
);
561 /* Get the decls in the order they were written.
562 Usually current_binding_level->names is in reverse order.
563 But parameter decls were previously put in forward order. */
566 current_binding_level
->names
567 = decls
= nreverse (current_binding_level
->names
);
569 decls
= current_binding_level
->names
;
571 /* If there were any declarations or structure tags in that level,
572 or if this level is a function body,
573 create a BLOCK to record them for the life of this function. */
575 if (keep
== 1 || functionbody
)
576 block
= make_node (BLOCK
);
577 if (block
!= NULL_TREE
)
579 BLOCK_VARS (block
) = decls
;
580 BLOCK_SUBBLOCKS (block
) = subblocks
;
583 /* In each subblock, record that this is its superior. */
585 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
586 BLOCK_SUPERCONTEXT (link
) = block
;
588 /* We still support the old for-scope rules, whereby the variables
589 in a for-init statement were in scope after the for-statement
590 ended. We only use the new rules if flag_new_for_scope is
593 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
595 /* Before we remove the declarations first check for unused variables. */
596 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
597 && !processing_template_decl
)
598 for (decl
= getdecls (); decl
; decl
= TREE_CHAIN (decl
))
599 if (TREE_CODE (decl
) == VAR_DECL
600 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
601 && ! DECL_IN_SYSTEM_HEADER (decl
)
602 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
))
604 if (! TREE_USED (decl
))
605 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
606 else if (DECL_CONTEXT (decl
) == current_function_decl
607 && TREE_TYPE (decl
) != error_mark_node
608 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
609 && errorcount
== unused_but_set_errorcount
610 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
611 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
613 warning (OPT_Wunused_but_set_variable
,
614 "variable %q+D set but not used", decl
);
615 unused_but_set_errorcount
= errorcount
;
619 /* Remove declarations for all the DECLs in this level. */
620 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
622 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
625 tree name
= DECL_NAME (link
);
629 ob
= outer_binding (name
,
630 IDENTIFIER_BINDING (name
),
633 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
635 ns_binding
= NULL_TREE
;
637 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
638 /* We have something like:
643 and we are leaving the `for' scope. There's no reason to
644 keep the binding of the inner `i' in this case. */
645 pop_binding (name
, link
);
646 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
647 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
648 /* Here, we have something like:
656 We must pop the for-scope binding so we know what's a
657 type and what isn't. */
658 pop_binding (name
, link
);
661 /* Mark this VAR_DECL as dead so that we can tell we left it
662 there only for backward compatibility. */
663 DECL_DEAD_FOR_LOCAL (link
) = 1;
665 /* Keep track of what should have happened when we
666 popped the binding. */
669 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
670 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
673 /* Add it to the list of dead variables in the next
674 outermost binding to that we can remove these when we
675 leave that binding. */
676 current_binding_level
->level_chain
->dead_vars_from_for
677 = tree_cons (NULL_TREE
, link
,
678 current_binding_level
->level_chain
->
681 /* Although we don't pop the cxx_binding, we do clear
682 its SCOPE since the scope is going away now. */
683 IDENTIFIER_BINDING (name
)->scope
684 = current_binding_level
->level_chain
;
691 /* Remove the binding. */
694 if (TREE_CODE (decl
) == TREE_LIST
)
695 decl
= TREE_VALUE (decl
);
698 if (TREE_CODE (name
) == OVERLOAD
)
699 name
= OVL_FUNCTION (name
);
701 gcc_assert (DECL_P (name
));
702 pop_binding (DECL_NAME (name
), decl
);
706 /* Remove declarations for any `for' variables from inner scopes
707 that we kept around. */
708 for (link
= current_binding_level
->dead_vars_from_for
;
709 link
; link
= TREE_CHAIN (link
))
710 pop_binding (DECL_NAME (TREE_VALUE (link
)), TREE_VALUE (link
));
712 /* Restore the IDENTIFIER_TYPE_VALUEs. */
713 for (link
= current_binding_level
->type_shadowed
;
714 link
; link
= TREE_CHAIN (link
))
715 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
717 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
718 for (link
= current_binding_level
->shadowed_labels
;
720 link
= TREE_CHAIN (link
))
721 pop_local_label (TREE_VALUE (link
), TREE_PURPOSE (link
));
723 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
724 list if a `using' declaration put them there. The debugging
725 back ends won't understand OVERLOAD, so we remove them here.
726 Because the BLOCK_VARS are (temporarily) shared with
727 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
728 popped all the bindings. */
733 for (d
= &BLOCK_VARS (block
); *d
; )
735 if (TREE_CODE (*d
) == TREE_LIST
)
736 *d
= TREE_CHAIN (*d
);
738 d
= &TREE_CHAIN (*d
);
742 /* If the level being exited is the top level of a function,
743 check over all the labels. */
746 /* Since this is the top level block of a function, the vars are
747 the function's parameters. Don't leave them in the BLOCK
748 because they are found in the FUNCTION_DECL instead. */
749 BLOCK_VARS (block
) = 0;
753 kind
= current_binding_level
->kind
;
754 if (kind
== sk_cleanup
)
758 /* If this is a temporary binding created for a cleanup, then we'll
759 have pushed a statement list level. Pop that, create a new
760 BIND_EXPR for the block, and insert it into the stream. */
761 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
762 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
769 /* The current function is being defined, so its DECL_INITIAL
770 should be error_mark_node. */
771 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
772 DECL_INITIAL (current_function_decl
) = block
;
775 current_binding_level
->blocks
776 = chainon (current_binding_level
->blocks
, block
);
778 /* If we did not make a block for the level just exited,
779 any blocks made for inner levels
780 (since they cannot be recorded as subblocks in that level)
781 must be carried forward so they will later become subblocks
782 of something else. */
784 current_binding_level
->blocks
785 = chainon (current_binding_level
->blocks
, subblocks
);
787 /* Each and every BLOCK node created here in `poplevel' is important
788 (e.g. for proper debugging information) so if we created one
789 earlier, mark it as "used". */
791 TREE_USED (block
) = 1;
793 /* All temporary bindings created for cleanups are popped silently. */
794 if (kind
== sk_cleanup
)
797 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, block
);
800 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
801 itself, calling F for each. The DATA is passed to F as well. */
804 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
807 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
809 result
|= (*f
) (name_space
, data
);
811 for (; current
; current
= TREE_CHAIN (current
))
812 result
|= walk_namespaces_r (current
, f
, data
);
817 /* Walk all the namespaces, calling F for each. The DATA is passed to
821 walk_namespaces (walk_namespaces_fn f
, void* data
)
823 return walk_namespaces_r (global_namespace
, f
, data
);
826 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
827 DATA is non-NULL, this is the last time we will call
828 wrapup_global_declarations for this NAMESPACE. */
831 wrapup_globals_for_namespace (tree name_space
, void* data
)
833 struct cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
834 VEC(tree
,gc
) *statics
= level
->static_decls
;
835 tree
*vec
= VEC_address (tree
, statics
);
836 int len
= VEC_length (tree
, statics
);
837 int last_time
= (data
!= 0);
841 check_global_declarations (vec
, len
);
842 emit_debug_global_declarations (vec
, len
);
846 /* Write out any globals that need to be output. */
847 return wrapup_global_declarations (vec
, len
);
851 /* In C++, you don't have to write `struct S' to refer to `S'; you
852 can just use `S'. We accomplish this by creating a TYPE_DECL as
853 if the user had written `typedef struct S S'. Create and return
854 the TYPE_DECL for TYPE. */
857 create_implicit_typedef (tree name
, tree type
)
861 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
862 DECL_ARTIFICIAL (decl
) = 1;
863 /* There are other implicit type declarations, like the one *within*
864 a class that allows you to write `S::S'. We must distinguish
866 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
867 TYPE_NAME (type
) = decl
;
868 TYPE_STUB_DECL (type
) = decl
;
873 /* Remember a local name for name-mangling purposes. */
876 push_local_name (tree decl
)
881 timevar_push (TV_NAME_LOOKUP
);
883 name
= DECL_NAME (decl
);
885 nelts
= VEC_length (tree
, local_names
);
886 for (i
= 0; i
< nelts
; i
++)
888 t
= VEC_index (tree
, local_names
, i
);
889 if (DECL_NAME (t
) == name
)
891 if (!DECL_LANG_SPECIFIC (decl
))
892 retrofit_lang_decl (decl
);
893 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
894 if (DECL_LANG_SPECIFIC (t
))
895 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
897 DECL_DISCRIMINATOR (decl
) = 1;
899 VEC_replace (tree
, local_names
, i
, decl
);
900 timevar_pop (TV_NAME_LOOKUP
);
905 VEC_safe_push (tree
, gc
, local_names
, decl
);
906 timevar_pop (TV_NAME_LOOKUP
);
909 /* Subroutine of duplicate_decls: return truthvalue of whether
910 or not types of these decls match.
912 For C++, we must compare the parameter list so that `int' can match
913 `int&' in a parameter position, but `int&' is not confused with
917 decls_match (tree newdecl
, tree olddecl
)
921 if (newdecl
== olddecl
)
924 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
925 /* If the two DECLs are not even the same kind of thing, we're not
926 interested in their types. */
929 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
931 tree f1
= TREE_TYPE (newdecl
);
932 tree f2
= TREE_TYPE (olddecl
);
933 tree p1
= TYPE_ARG_TYPES (f1
);
934 tree p2
= TYPE_ARG_TYPES (f2
);
936 /* Specializations of different templates are different functions
937 even if they have the same type. */
938 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
939 ? DECL_TI_TEMPLATE (newdecl
)
941 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
942 ? DECL_TI_TEMPLATE (olddecl
)
947 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
948 && ! (DECL_EXTERN_C_P (newdecl
)
949 && DECL_EXTERN_C_P (olddecl
)))
952 #ifdef NO_IMPLICIT_EXTERN_C
953 /* A new declaration doesn't match a built-in one unless it
954 is also extern "C". */
955 if (DECL_IS_BUILTIN (olddecl
)
956 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
960 if (TREE_CODE (f1
) != TREE_CODE (f2
))
963 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
965 if (p2
== NULL_TREE
&& DECL_EXTERN_C_P (olddecl
)
966 && (DECL_BUILT_IN (olddecl
)
967 #ifndef NO_IMPLICIT_EXTERN_C
968 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
969 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
973 types_match
= self_promoting_args_p (p1
);
974 if (p1
== void_list_node
)
975 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
977 #ifndef NO_IMPLICIT_EXTERN_C
978 else if (p1
== NULL_TREE
979 && (DECL_EXTERN_C_P (olddecl
)
980 && DECL_IN_SYSTEM_HEADER (olddecl
)
981 && !DECL_CLASS_SCOPE_P (olddecl
))
982 && (DECL_EXTERN_C_P (newdecl
)
983 && DECL_IN_SYSTEM_HEADER (newdecl
)
984 && !DECL_CLASS_SCOPE_P (newdecl
)))
986 types_match
= self_promoting_args_p (p2
);
987 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
991 types_match
= compparms (p1
, p2
);
996 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
998 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
999 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1002 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1003 DECL_TEMPLATE_PARMS (olddecl
)))
1006 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1007 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1008 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1010 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1011 DECL_TEMPLATE_RESULT (newdecl
));
1015 /* Need to check scope for variable declaration (VAR_DECL).
1016 For typedef (TYPE_DECL), scope is ignored. */
1017 if (TREE_CODE (newdecl
) == VAR_DECL
1018 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1020 Two declarations for an object with C language linkage
1021 with the same name (ignoring the namespace that qualify
1022 it) that appear in different namespace scopes refer to
1024 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1027 if (TREE_TYPE (newdecl
) == error_mark_node
)
1028 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1029 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1030 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1031 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1034 types_match
= comptypes (TREE_TYPE (newdecl
),
1035 TREE_TYPE (olddecl
),
1036 COMPARE_REDECLARATION
);
1042 /* If NEWDECL is `static' and an `extern' was seen previously,
1043 warn about it. OLDDECL is the previous declaration.
1045 Note that this does not apply to the C++ case of declaring
1046 a variable `extern const' and then later `const'.
1048 Don't complain about built-in functions, since they are beyond
1049 the user's control. */
1052 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1054 if (TREE_CODE (newdecl
) == TYPE_DECL
1055 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1056 || TREE_CODE (newdecl
) == CONST_DECL
1057 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1060 /* Don't get confused by static member functions; that's a different
1062 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1063 && DECL_STATIC_FUNCTION_P (newdecl
))
1066 /* If the old declaration was `static', or the new one isn't, then
1067 then everything is OK. */
1068 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1071 /* It's OK to declare a builtin function as `static'. */
1072 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1073 && DECL_ARTIFICIAL (olddecl
))
1076 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1077 permerror (input_location
, "previous declaration of %q+D", olddecl
);
1080 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1081 function templates. If their exception specifications do not
1082 match, issue a diagnostic. */
1085 check_redeclaration_exception_specification (tree new_decl
,
1090 tree new_exceptions
;
1091 tree old_exceptions
;
1093 new_type
= TREE_TYPE (new_decl
);
1094 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1095 old_type
= TREE_TYPE (old_decl
);
1096 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1100 If any declaration of a function has an exception-specification,
1101 all declarations, including the definition and an explicit
1102 specialization, of that function shall have an
1103 exception-specification with the same set of type-ids. */
1104 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1105 && ! DECL_IS_BUILTIN (old_decl
)
1107 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1109 error ("declaration of %qF has a different exception specifier",
1111 error ("from previous declaration %q+F", old_decl
);
1115 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1116 && lookup_attribute ("gnu_inline", \
1117 DECL_ATTRIBUTES (fn)))
1119 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1120 If the redeclaration is invalid, a diagnostic is issued, and the
1121 error_mark_node is returned. Otherwise, OLDDECL is returned.
1123 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1126 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1129 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1131 unsigned olddecl_uid
= DECL_UID (olddecl
);
1132 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1133 int new_defines_function
= 0;
1134 tree new_template_info
;
1136 if (newdecl
== olddecl
)
1139 types_match
= decls_match (newdecl
, olddecl
);
1141 /* If either the type of the new decl or the type of the old decl is an
1142 error_mark_node, then that implies that we have already issued an
1143 error (earlier) for some bogus type specification, and in that case,
1144 it is rather pointless to harass the user with yet more error message
1145 about the same declaration, so just pretend the types match here. */
1146 if (TREE_TYPE (newdecl
) == error_mark_node
1147 || TREE_TYPE (olddecl
) == error_mark_node
)
1148 return error_mark_node
;
1150 if (DECL_P (olddecl
)
1151 && TREE_CODE (newdecl
) == FUNCTION_DECL
1152 && TREE_CODE (olddecl
) == FUNCTION_DECL
1153 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1155 if (DECL_DECLARED_INLINE_P (newdecl
)
1156 && DECL_UNINLINABLE (newdecl
)
1157 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1158 /* Already warned elsewhere. */;
1159 else if (DECL_DECLARED_INLINE_P (olddecl
)
1160 && DECL_UNINLINABLE (olddecl
)
1161 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1162 /* Already warned. */;
1163 else if (DECL_DECLARED_INLINE_P (newdecl
)
1164 && DECL_UNINLINABLE (olddecl
)
1165 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1167 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1169 warning (OPT_Wattributes
, "previous declaration of %q+D "
1170 "with attribute noinline", olddecl
);
1172 else if (DECL_DECLARED_INLINE_P (olddecl
)
1173 && DECL_UNINLINABLE (newdecl
)
1174 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1176 warning (OPT_Wattributes
, "function %q+D redeclared with "
1177 "attribute noinline", newdecl
);
1178 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1183 /* Check for redeclaration and other discrepancies. */
1184 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1185 && DECL_ARTIFICIAL (olddecl
))
1187 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1188 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1190 /* Avoid warnings redeclaring built-ins which have not been
1191 explicitly declared. */
1192 if (DECL_ANTICIPATED (olddecl
))
1195 /* If you declare a built-in or predefined function name as static,
1196 the old definition is overridden, but optionally warn this was a
1197 bad choice of name. */
1198 if (! TREE_PUBLIC (newdecl
))
1200 warning (OPT_Wshadow
,
1201 DECL_BUILT_IN (olddecl
)
1202 ? G_("shadowing built-in function %q#D")
1203 : G_("shadowing library function %q#D"), olddecl
);
1204 /* Discard the old built-in function. */
1207 /* If the built-in is not ansi, then programs can override
1208 it even globally without an error. */
1209 else if (! DECL_BUILT_IN (olddecl
))
1210 warning (0, "library function %q#D redeclared as non-function %q#D",
1214 error ("declaration of %q#D", newdecl
);
1215 error ("conflicts with built-in declaration %q#D",
1220 else if (!types_match
)
1222 /* Avoid warnings redeclaring built-ins which have not been
1223 explicitly declared. */
1224 if (DECL_ANTICIPATED (olddecl
))
1226 /* Deal with fileptr_type_node. FILE type is not known
1227 at the time we create the builtins. */
1230 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1231 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1233 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1236 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1238 tree t
= TREE_VALUE (t1
);
1240 if (TREE_CODE (t
) == POINTER_TYPE
1241 && TYPE_NAME (TREE_TYPE (t
))
1242 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1243 == get_identifier ("FILE")
1244 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1246 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1248 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1249 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1250 types_match
= decls_match (newdecl
, olddecl
);
1252 return duplicate_decls (newdecl
, olddecl
,
1254 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1257 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1260 else if ((DECL_EXTERN_C_P (newdecl
)
1261 && DECL_EXTERN_C_P (olddecl
))
1262 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1263 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1265 /* A near match; override the builtin. */
1267 if (TREE_PUBLIC (newdecl
))
1269 warning (0, "new declaration %q#D", newdecl
);
1270 warning (0, "ambiguates built-in declaration %q#D",
1274 warning (OPT_Wshadow
,
1275 DECL_BUILT_IN (olddecl
)
1276 ? G_("shadowing built-in function %q#D")
1277 : G_("shadowing library function %q#D"), olddecl
);
1280 /* Discard the old built-in function. */
1283 /* Replace the old RTL to avoid problems with inlining. */
1284 COPY_DECL_RTL (newdecl
, olddecl
);
1286 /* Even if the types match, prefer the new declarations type for
1287 built-ins which have not been explicitly declared, for
1288 exception lists, etc... */
1289 else if (DECL_SOURCE_LOCATION (olddecl
) == BUILTINS_LOCATION
)
1291 tree type
= TREE_TYPE (newdecl
);
1292 tree attribs
= (*targetm
.merge_type_attributes
)
1293 (TREE_TYPE (olddecl
), type
);
1295 type
= cp_build_type_attribute_variant (type
, attribs
);
1296 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1299 /* If a function is explicitly declared "throw ()", propagate that to
1300 the corresponding builtin. */
1301 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1302 && DECL_ANTICIPATED (olddecl
)
1303 && TREE_NOTHROW (newdecl
)
1304 && !TREE_NOTHROW (olddecl
)
1305 && built_in_decls
[DECL_FUNCTION_CODE (olddecl
)] != NULL_TREE
1306 && built_in_decls
[DECL_FUNCTION_CODE (olddecl
)] != olddecl
1308 TREE_NOTHROW (built_in_decls
[DECL_FUNCTION_CODE (olddecl
)]) = 1;
1310 /* Whether or not the builtin can throw exceptions has no
1311 bearing on this declarator. */
1312 TREE_NOTHROW (olddecl
) = 0;
1314 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1316 /* If a builtin function is redeclared as `static', merge
1317 the declarations, but make the original one static. */
1318 DECL_THIS_STATIC (olddecl
) = 1;
1319 TREE_PUBLIC (olddecl
) = 0;
1321 /* Make the old declaration consistent with the new one so
1322 that all remnants of the builtin-ness of this function
1323 will be banished. */
1324 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1325 COPY_DECL_RTL (newdecl
, olddecl
);
1328 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1330 /* C++ Standard, 3.3, clause 4:
1331 "[Note: a namespace name or a class template name must be unique
1332 in its declarative region (7.3.2, clause 14). ]" */
1333 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1334 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1335 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1336 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1337 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1338 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1340 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1341 && TREE_CODE (newdecl
) != TYPE_DECL
)
1342 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1343 && TREE_CODE (olddecl
) != TYPE_DECL
))
1345 /* We do nothing special here, because C++ does such nasty
1346 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1347 get shadowed, and know that if we need to find a TYPE_DECL
1348 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1349 slot of the identifier. */
1353 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1354 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1355 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1356 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1360 error ("%q#D redeclared as different kind of symbol", newdecl
);
1361 if (TREE_CODE (olddecl
) == TREE_LIST
)
1362 olddecl
= TREE_VALUE (olddecl
);
1363 error ("previous declaration of %q+#D", olddecl
);
1365 return error_mark_node
;
1367 else if (!types_match
)
1369 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1370 /* These are certainly not duplicate declarations; they're
1371 from different scopes. */
1374 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1376 /* The name of a class template may not be declared to refer to
1377 any other template, class, function, object, namespace, value,
1378 or type in the same scope. */
1379 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1380 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1382 error ("declaration of template %q#D", newdecl
);
1383 error ("conflicts with previous declaration %q+#D", olddecl
);
1385 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1386 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1387 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1388 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1389 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1390 DECL_TEMPLATE_PARMS (olddecl
))
1391 /* Template functions can be disambiguated by
1393 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1394 TREE_TYPE (TREE_TYPE (olddecl
))))
1396 error ("new declaration %q#D", newdecl
);
1397 error ("ambiguates old declaration %q+#D", olddecl
);
1401 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1403 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1405 error ("declaration of C function %q#D conflicts with",
1407 error ("previous declaration %q+#D here", olddecl
);
1409 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1410 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1412 error ("new declaration %q#D", newdecl
);
1413 error ("ambiguates old declaration %q+#D", olddecl
);
1414 return error_mark_node
;
1421 error ("conflicting declaration %q#D", newdecl
);
1422 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1423 return error_mark_node
;
1426 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1427 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1428 && (!DECL_TEMPLATE_INFO (newdecl
)
1429 || (DECL_TI_TEMPLATE (newdecl
)
1430 != DECL_TI_TEMPLATE (olddecl
))))
1431 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1432 && (!DECL_TEMPLATE_INFO (olddecl
)
1433 || (DECL_TI_TEMPLATE (olddecl
)
1434 != DECL_TI_TEMPLATE (newdecl
))))))
1435 /* It's OK to have a template specialization and a non-template
1436 with the same type, or to have specializations of two
1437 different templates with the same type. Note that if one is a
1438 specialization, and the other is an instantiation of the same
1439 template, that we do not exit at this point. That situation
1440 can occur if we instantiate a template class, and then
1441 specialize one of its methods. This situation is valid, but
1442 the declarations must be merged in the usual way. */
1444 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1445 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1446 && !DECL_USE_TEMPLATE (newdecl
))
1447 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1448 && !DECL_USE_TEMPLATE (olddecl
))))
1449 /* One of the declarations is a template instantiation, and the
1450 other is not a template at all. That's OK. */
1452 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1454 /* In [namespace.alias] we have:
1456 In a declarative region, a namespace-alias-definition can be
1457 used to redefine a namespace-alias declared in that declarative
1458 region to refer only to the namespace to which it already
1461 Therefore, if we encounter a second alias directive for the same
1462 alias, we can just ignore the second directive. */
1463 if (DECL_NAMESPACE_ALIAS (newdecl
)
1464 && (DECL_NAMESPACE_ALIAS (newdecl
)
1465 == DECL_NAMESPACE_ALIAS (olddecl
)))
1467 /* [namespace.alias]
1469 A namespace-name or namespace-alias shall not be declared as
1470 the name of any other entity in the same declarative region.
1471 A namespace-name defined at global scope shall not be
1472 declared as the name of any other entity in any global scope
1474 error ("declaration of namespace %qD conflicts with", newdecl
);
1475 error ("previous declaration of namespace %q+D here", olddecl
);
1476 return error_mark_node
;
1480 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1483 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1484 if (DECL_NAME (olddecl
) != NULL_TREE
)
1485 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1486 ? "%q+#D previously defined here"
1487 : "%q+#D previously declared here", olddecl
);
1488 return error_mark_node
;
1490 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1491 && DECL_INITIAL (olddecl
) != NULL_TREE
1492 && TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) == NULL_TREE
1493 && TYPE_ARG_TYPES (TREE_TYPE (newdecl
)) != NULL_TREE
)
1495 /* Prototype decl follows defn w/o prototype. */
1496 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1497 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1498 "follows non-prototype definition here");
1500 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1501 || TREE_CODE (olddecl
) == VAR_DECL
)
1502 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1505 If two declarations of the same function or object
1506 specify different linkage-specifications ..., the program
1507 is ill-formed.... Except for functions with C++ linkage,
1508 a function declaration without a linkage specification
1509 shall not precede the first linkage specification for
1510 that function. A function can be declared without a
1511 linkage specification after an explicit linkage
1512 specification has been seen; the linkage explicitly
1513 specified in the earlier declaration is not affected by
1514 such a function declaration.
1516 DR 563 raises the question why the restrictions on
1517 functions should not also apply to objects. Older
1518 versions of G++ silently ignore the linkage-specification
1526 which is clearly wrong. Therefore, we now treat objects
1528 if (current_lang_depth () == 0)
1530 /* There is no explicit linkage-specification, so we use
1531 the linkage from the previous declaration. */
1532 if (!DECL_LANG_SPECIFIC (newdecl
))
1533 retrofit_lang_decl (newdecl
);
1534 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1538 error ("previous declaration of %q+#D with %qL linkage",
1539 olddecl
, DECL_LANGUAGE (olddecl
));
1540 error ("conflicts with new declaration with %qL linkage",
1541 DECL_LANGUAGE (newdecl
));
1545 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1547 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1549 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1550 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1553 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1554 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1556 for (; t1
&& t1
!= void_list_node
;
1557 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1558 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1560 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1563 permerror (input_location
, "default argument given for parameter %d of %q#D",
1565 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1569 error ("default argument given for parameter %d of %q#D",
1571 error ("after previous specification in %q+#D",
1578 /* Do not merge an implicit typedef with an explicit one. In:
1582 typedef class A A __attribute__ ((foo));
1584 the attribute should apply only to the typedef. */
1585 if (TREE_CODE (olddecl
) == TYPE_DECL
1586 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1587 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1590 /* If new decl is `static' and an `extern' was seen previously,
1592 warn_extern_redeclared_static (newdecl
, olddecl
);
1594 /* We have committed to returning 1 at this point. */
1595 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1597 /* Now that functions must hold information normally held
1598 by field decls, there is extra work to do so that
1599 declaration information does not get destroyed during
1601 if (DECL_VINDEX (olddecl
))
1602 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1603 if (DECL_CONTEXT (olddecl
))
1604 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1605 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1606 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1607 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1608 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1609 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1610 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1611 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1612 SET_OVERLOADED_OPERATOR_CODE
1613 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1614 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1616 /* Optionally warn about more than one declaration for the same
1617 name, but don't warn about a function declaration followed by a
1619 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1620 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1621 /* Don't warn about extern decl followed by definition. */
1622 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1623 /* Don't warn about friends, let add_friend take care of it. */
1624 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
)))
1626 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1627 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1630 if (DECL_DELETED_FN (newdecl
))
1632 error ("deleted definition of %qD", newdecl
);
1633 error ("after previous declaration %q+D", olddecl
);
1637 /* Deal with C++: must preserve virtual function table size. */
1638 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1640 tree newtype
= TREE_TYPE (newdecl
);
1641 tree oldtype
= TREE_TYPE (olddecl
);
1643 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1644 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1645 CLASSTYPE_FRIEND_CLASSES (newtype
)
1646 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1648 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1651 /* Copy all the DECL_... slots specified in the new decl
1652 except for any that we copy here from the old type. */
1653 DECL_ATTRIBUTES (newdecl
)
1654 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1656 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1660 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1661 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1662 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1663 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1664 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1665 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1667 DECL_ATTRIBUTES (old_result
)
1668 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1670 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1672 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1673 && DECL_INITIAL (new_result
))
1675 if (DECL_INITIAL (old_result
))
1676 DECL_UNINLINABLE (old_result
) = 1;
1678 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1679 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1680 DECL_NOT_REALLY_EXTERN (old_result
)
1681 = DECL_NOT_REALLY_EXTERN (new_result
);
1682 DECL_INTERFACE_KNOWN (old_result
)
1683 = DECL_INTERFACE_KNOWN (new_result
);
1684 DECL_DECLARED_INLINE_P (old_result
)
1685 = DECL_DECLARED_INLINE_P (new_result
);
1686 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1687 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1692 DECL_DECLARED_INLINE_P (old_result
)
1693 |= DECL_DECLARED_INLINE_P (new_result
);
1694 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1695 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1696 check_redeclaration_exception_specification (newdecl
, olddecl
);
1700 /* If the new declaration is a definition, update the file and
1701 line information on the declaration, and also make
1702 the old declaration the same definition. */
1703 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1705 DECL_SOURCE_LOCATION (olddecl
)
1706 = DECL_SOURCE_LOCATION (old_result
)
1707 = DECL_SOURCE_LOCATION (newdecl
);
1708 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1709 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1712 DECL_ARGUMENTS (old_result
)
1713 = DECL_ARGUMENTS (new_result
);
1714 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1715 parm
= TREE_CHAIN (parm
))
1716 DECL_CONTEXT (parm
) = old_result
;
1725 /* Automatically handles default parameters. */
1726 tree oldtype
= TREE_TYPE (olddecl
);
1729 /* Merge the data types specified in the two decls. */
1730 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1732 /* If merge_types produces a non-typedef type, just use the old type. */
1733 if (TREE_CODE (newdecl
) == TYPE_DECL
1734 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1737 if (TREE_CODE (newdecl
) == VAR_DECL
)
1739 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1740 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1741 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1742 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1743 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1744 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1746 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1747 if (DECL_LANG_SPECIFIC (olddecl
)
1748 && CP_DECL_THREADPRIVATE_P (olddecl
))
1750 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1751 if (!DECL_LANG_SPECIFIC (newdecl
))
1752 retrofit_lang_decl (newdecl
);
1754 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1755 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1759 /* Do this after calling `merge_types' so that default
1760 parameters don't confuse us. */
1761 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1762 check_redeclaration_exception_specification (newdecl
, olddecl
);
1763 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1765 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1766 check_default_args (newdecl
);
1768 /* Lay the type out, unless already done. */
1769 if (! same_type_p (newtype
, oldtype
)
1770 && TREE_TYPE (newdecl
) != error_mark_node
1771 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1772 layout_type (TREE_TYPE (newdecl
));
1774 if ((TREE_CODE (newdecl
) == VAR_DECL
1775 || TREE_CODE (newdecl
) == PARM_DECL
1776 || TREE_CODE (newdecl
) == RESULT_DECL
1777 || TREE_CODE (newdecl
) == FIELD_DECL
1778 || TREE_CODE (newdecl
) == TYPE_DECL
)
1779 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1780 layout_decl (newdecl
, 0);
1782 /* Merge the type qualifiers. */
1783 if (TREE_READONLY (newdecl
))
1784 TREE_READONLY (olddecl
) = 1;
1785 if (TREE_THIS_VOLATILE (newdecl
))
1786 TREE_THIS_VOLATILE (olddecl
) = 1;
1787 if (TREE_NOTHROW (newdecl
))
1788 TREE_NOTHROW (olddecl
) = 1;
1790 /* Merge deprecatedness. */
1791 if (TREE_DEPRECATED (newdecl
))
1792 TREE_DEPRECATED (olddecl
) = 1;
1794 /* Preserve function specific target and optimization options */
1795 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1797 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1798 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1799 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1800 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1802 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1803 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1804 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1805 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1808 /* Merge the initialization information. */
1809 if (DECL_INITIAL (newdecl
) == NULL_TREE
1810 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1812 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1813 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1814 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1816 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1817 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1821 /* Merge the section attribute.
1822 We want to issue an error if the sections conflict but that must be
1823 done later in decl_attributes since we are called before attributes
1825 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1826 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1828 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1830 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1831 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1832 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1833 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1834 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1835 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1836 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1837 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1838 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1839 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1840 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1841 /* Keep the old RTL. */
1842 COPY_DECL_RTL (olddecl
, newdecl
);
1844 else if (TREE_CODE (newdecl
) == VAR_DECL
1845 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1847 /* Keep the old RTL. We cannot keep the old RTL if the old
1848 declaration was for an incomplete object and the new
1849 declaration is not since many attributes of the RTL will
1851 COPY_DECL_RTL (olddecl
, newdecl
);
1854 /* If cannot merge, then use the new type and qualifiers,
1855 and don't preserve the old rtl. */
1858 /* Clean out any memory we had of the old declaration. */
1859 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1861 TREE_VALUE (oldstatic
) = error_mark_node
;
1863 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1864 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1865 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1866 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1869 /* Merge the storage class information. */
1870 merge_weak (newdecl
, olddecl
);
1872 if (DECL_ONE_ONLY (olddecl
))
1873 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
1875 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1876 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1877 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1878 if (! DECL_EXTERNAL (olddecl
))
1879 DECL_EXTERNAL (newdecl
) = 0;
1881 new_template_info
= NULL_TREE
;
1882 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1884 bool new_redefines_gnu_inline
= false;
1886 if (new_defines_function
1887 && ((DECL_INTERFACE_KNOWN (olddecl
)
1888 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
1889 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
1890 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1891 == FUNCTION_DECL
))))
1895 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
1896 fn
= DECL_TEMPLATE_RESULT (olddecl
);
1898 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
1901 if (!new_redefines_gnu_inline
)
1903 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1904 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1905 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1907 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1908 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1909 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
1911 /* If the OLDDECL is an instantiation and/or specialization,
1912 then the NEWDECL must be too. But, it may not yet be marked
1913 as such if the caller has created NEWDECL, but has not yet
1914 figured out that it is a redeclaration. */
1915 if (!DECL_USE_TEMPLATE (newdecl
))
1916 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
1918 /* Don't really know how much of the language-specific
1919 values we should copy from old to new. */
1920 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
1921 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
1922 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
1923 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
1925 if (LANG_DECL_HAS_MIN (newdecl
))
1927 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
1928 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
1929 if (DECL_TEMPLATE_INFO (newdecl
))
1930 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
1931 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
1933 /* Only functions have these fields. */
1934 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1935 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
1937 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
1938 olddecl_friend
= DECL_FRIEND_P (olddecl
);
1939 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
1940 && DECL_HIDDEN_FRIEND_P (olddecl
)
1941 && newdecl_is_friend
);
1942 DECL_BEFRIENDING_CLASSES (newdecl
)
1943 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
1944 DECL_BEFRIENDING_CLASSES (olddecl
));
1945 /* DECL_THUNKS is only valid for virtual functions,
1946 otherwise it is a DECL_FRIEND_CONTEXT. */
1947 if (DECL_VIRTUAL_P (newdecl
))
1948 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
1950 /* Only variables have this field. */
1951 else if (TREE_CODE (newdecl
) == VAR_DECL
1952 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
1953 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
1956 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1960 /* Merge parameter attributes. */
1961 tree oldarg
, newarg
;
1962 for (oldarg
= DECL_ARGUMENTS(olddecl
),
1963 newarg
= DECL_ARGUMENTS(newdecl
);
1965 oldarg
= TREE_CHAIN(oldarg
), newarg
= TREE_CHAIN(newarg
)) {
1966 DECL_ATTRIBUTES (newarg
)
1967 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
1968 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
1971 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
1972 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
1974 /* If newdecl is not a specialization, then it is not a
1975 template-related function at all. And that means that we
1976 should have exited above, returning 0. */
1977 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
1979 if (DECL_ODR_USED (olddecl
))
1980 /* From [temp.expl.spec]:
1982 If a template, a member template or the member of a class
1983 template is explicitly specialized then that
1984 specialization shall be declared before the first use of
1985 that specialization that would cause an implicit
1986 instantiation to take place, in every translation unit in
1987 which such a use occurs. */
1988 error ("explicit specialization of %qD after first use",
1991 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
1993 /* Don't propagate visibility from the template to the
1994 specialization here. We'll do that in determine_visibility if
1996 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
1998 /* [temp.expl.spec/14] We don't inline explicit specialization
1999 just because the primary template says so. */
2001 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2003 /* Never inline re-defined extern inline functions.
2004 FIXME: this could be better handled by keeping both
2005 function as separate declarations. */
2006 DECL_UNINLINABLE (newdecl
) = 1;
2010 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2011 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2013 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2015 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2016 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2018 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2019 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2020 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2021 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2024 /* Preserve abstractness on cloned [cd]tors. */
2025 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2027 /* Update newdecl's parms to point at olddecl. */
2028 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2029 parm
= TREE_CHAIN (parm
))
2030 DECL_CONTEXT (parm
) = olddecl
;
2034 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2035 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2036 COPY_DECL_RTL (newdecl
, olddecl
);
2038 if (! types_match
|| new_defines_function
)
2040 /* These need to be copied so that the names are available.
2041 Note that if the types do match, we'll preserve inline
2042 info and other bits, but if not, we won't. */
2043 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2044 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2046 if (new_defines_function
)
2047 /* If defining a function declared with other language
2048 linkage, use the previously declared language linkage. */
2049 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2050 else if (types_match
)
2052 /* If redeclaring a builtin function, and not a definition,
2053 it stays built in. */
2054 if (DECL_BUILT_IN (olddecl
))
2056 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2057 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2058 /* If we're keeping the built-in definition, keep the rtl,
2059 regardless of declaration matches. */
2060 COPY_DECL_RTL (olddecl
, newdecl
);
2063 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2064 /* Don't clear out the arguments if we're just redeclaring a
2066 if (DECL_ARGUMENTS (olddecl
))
2067 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2070 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2071 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2073 /* Now preserve various other info from the definition. */
2074 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2075 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2076 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2077 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2079 /* Warn about conflicting visibility specifications. */
2080 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2081 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2082 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2084 warning_at (input_location
, OPT_Wattributes
,
2085 "%q+D: visibility attribute ignored because it", newdecl
);
2086 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2087 "conflicts with previous declaration here");
2089 /* Choose the declaration which specified visibility. */
2090 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2092 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2093 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2095 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2096 so keep this behavior. */
2097 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
2099 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2100 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2103 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2104 with that from NEWDECL below. */
2105 if (DECL_LANG_SPECIFIC (olddecl
))
2107 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2108 != DECL_LANG_SPECIFIC (newdecl
));
2109 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2112 /* Merge the USED information. */
2113 if (TREE_USED (olddecl
))
2114 TREE_USED (newdecl
) = 1;
2115 else if (TREE_USED (newdecl
))
2116 TREE_USED (olddecl
) = 1;
2117 if (TREE_CODE (newdecl
) == VAR_DECL
)
2119 if (DECL_READ_P (olddecl
))
2120 DECL_READ_P (newdecl
) = 1;
2121 else if (DECL_READ_P (newdecl
))
2122 DECL_READ_P (olddecl
) = 1;
2124 if (DECL_PRESERVE_P (olddecl
))
2125 DECL_PRESERVE_P (newdecl
) = 1;
2126 else if (DECL_PRESERVE_P (newdecl
))
2127 DECL_PRESERVE_P (olddecl
) = 1;
2129 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2133 function_size
= sizeof (struct tree_decl_common
);
2135 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2136 (char *) newdecl
+ sizeof (struct tree_common
),
2137 function_size
- sizeof (struct tree_common
));
2139 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2140 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2141 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2142 if (new_template_info
)
2143 /* If newdecl is a template instantiation, it is possible that
2144 the following sequence of events has occurred:
2146 o A friend function was declared in a class template. The
2147 class template was instantiated.
2149 o The instantiation of the friend declaration was
2150 recorded on the instantiation list, and is newdecl.
2152 o Later, however, instantiate_class_template called pushdecl
2153 on the newdecl to perform name injection. But, pushdecl in
2154 turn called duplicate_decls when it discovered that another
2155 declaration of a global function with the same name already
2158 o Here, in duplicate_decls, we decided to clobber newdecl.
2160 If we're going to do that, we'd better make sure that
2161 olddecl, and not newdecl, is on the list of
2162 instantiations so that if we try to do the instantiation
2163 again we won't get the clobbered declaration. */
2164 reregister_specialization (newdecl
,
2170 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2171 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2172 (char *) newdecl
+ sizeof (struct tree_common
),
2173 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2174 switch (TREE_CODE (olddecl
))
2184 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2185 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2186 size
- sizeof (struct tree_decl_common
)
2187 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2191 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2192 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2193 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2194 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2198 DECL_UID (olddecl
) = olddecl_uid
;
2200 DECL_FRIEND_P (olddecl
) = 1;
2203 DECL_ANTICIPATED (olddecl
) = 1;
2204 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2207 /* NEWDECL contains the merged attribute lists.
2208 Update OLDDECL to be the same. */
2209 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2211 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2212 so that encode_section_info has a chance to look at the new decl
2213 flags and attributes. */
2214 if (DECL_RTL_SET_P (olddecl
)
2215 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2216 || (TREE_CODE (olddecl
) == VAR_DECL
2217 && TREE_STATIC (olddecl
))))
2218 make_decl_rtl (olddecl
);
2220 /* The NEWDECL will no longer be needed. Because every out-of-class
2221 declaration of a member results in a call to duplicate_decls,
2222 freeing these nodes represents in a significant savings. */
2228 /* Return zero if the declaration NEWDECL is valid
2229 when the declaration OLDDECL (assumed to be for the same name)
2230 has already been seen.
2231 Otherwise return an error message format string with a %s
2232 where the identifier should go. */
2235 redeclaration_error_message (tree newdecl
, tree olddecl
)
2237 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2239 /* Because C++ can put things into name space for free,
2240 constructs like "typedef struct foo { ... } foo"
2241 would look like an erroneous redeclaration. */
2242 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2245 return G_("redefinition of %q#D");
2247 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2249 /* If this is a pure function, its olddecl will actually be
2250 the original initialization to `0' (which we force to call
2251 abort()). Don't complain about redefinition in this case. */
2252 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2253 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2256 /* If both functions come from different namespaces, this is not
2257 a redeclaration - this is a conflict with a used function. */
2258 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2259 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2260 && ! decls_match (olddecl
, newdecl
))
2261 return G_("%qD conflicts with used function");
2263 /* We'll complain about linkage mismatches in
2264 warn_extern_redeclared_static. */
2266 /* Defining the same name twice is no good. */
2267 if (DECL_INITIAL (olddecl
) != NULL_TREE
2268 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2270 if (DECL_NAME (olddecl
) == NULL_TREE
)
2271 return G_("%q#D not declared in class");
2272 else if (!GNU_INLINE_P (olddecl
)
2273 || GNU_INLINE_P (newdecl
))
2274 return G_("redefinition of %q#D");
2277 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2279 bool olda
= GNU_INLINE_P (olddecl
);
2280 bool newa
= GNU_INLINE_P (newdecl
);
2285 return G_("%q+D redeclared inline with "
2286 "%<gnu_inline%> attribute");
2288 return G_("%q+D redeclared inline without "
2289 "%<gnu_inline%> attribute");
2295 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2299 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2301 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2302 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2303 return G_("redefinition of %q#D");
2307 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2308 || (DECL_TEMPLATE_RESULT (newdecl
)
2309 == DECL_TEMPLATE_RESULT (olddecl
)))
2312 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2313 if (DECL_TEMPLATE_INFO (nt
))
2314 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2315 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2316 if (DECL_TEMPLATE_INFO (ot
))
2317 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2318 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2319 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2320 return G_("redefinition of %q#D");
2322 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2324 bool olda
= GNU_INLINE_P (ot
);
2325 bool newa
= GNU_INLINE_P (nt
);
2330 return G_("%q+D redeclared inline with "
2331 "%<gnu_inline%> attribute");
2333 return G_("%q+D redeclared inline without "
2334 "%<gnu_inline%> attribute");
2338 /* Core issue #226 (C++0x):
2340 If a friend function template declaration specifies a
2341 default template-argument, that declaration shall be a
2342 definition and shall be the only declaration of the
2343 function template in the translation unit. */
2344 if ((cxx_dialect
!= cxx98
)
2345 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2346 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2347 /*is_primary=*/1, /*is_partial=*/0,
2348 /*is_friend_decl=*/2))
2349 return G_("redeclaration of friend %q#D "
2350 "may not have default template arguments");
2354 else if (TREE_CODE (newdecl
) == VAR_DECL
2355 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2356 && (! DECL_LANG_SPECIFIC (olddecl
)
2357 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2358 || DECL_THREAD_LOCAL_P (newdecl
)))
2360 /* Only variables can be thread-local, and all declarations must
2361 agree on this property. */
2362 if (DECL_THREAD_LOCAL_P (newdecl
))
2363 return G_("thread-local declaration of %q#D follows "
2364 "non-thread-local declaration");
2366 return G_("non-thread-local declaration of %q#D follows "
2367 "thread-local declaration");
2369 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2371 /* The objects have been declared at namespace scope. If either
2372 is a member of an anonymous union, then this is an invalid
2373 redeclaration. For example:
2379 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2380 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2381 return G_("redeclaration of %q#D");
2382 /* If at least one declaration is a reference, there is no
2383 conflict. For example:
2389 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2391 /* Reject two definitions. */
2392 return G_("redefinition of %q#D");
2396 /* Objects declared with block scope: */
2397 /* Reject two definitions, and reject a definition
2398 together with an external reference. */
2399 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2400 return G_("redeclaration of %q#D");
2405 /* Hash and equality functions for the named_label table. */
2408 named_label_entry_hash (const void *data
)
2410 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2411 return DECL_UID (ent
->label_decl
);
2415 named_label_entry_eq (const void *a
, const void *b
)
2417 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2418 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2419 return ent_a
->label_decl
== ent_b
->label_decl
;
2422 /* Create a new label, named ID. */
2425 make_label_decl (tree id
, int local_p
)
2427 struct named_label_entry
*ent
;
2431 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2433 DECL_CONTEXT (decl
) = current_function_decl
;
2434 DECL_MODE (decl
) = VOIDmode
;
2435 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2437 /* Say where one reference is to the label, for the sake of the
2438 error if it is not defined. */
2439 DECL_SOURCE_LOCATION (decl
) = input_location
;
2441 /* Record the fact that this identifier is bound to this label. */
2442 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2444 /* Create the label htab for the function on demand. */
2446 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2447 named_label_entry_eq
, NULL
);
2449 /* Record this label on the list of labels used in this function.
2450 We do this before calling make_label_decl so that we get the
2451 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2452 ent
= ggc_alloc_cleared_named_label_entry ();
2453 ent
->label_decl
= decl
;
2455 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2456 gcc_assert (*slot
== NULL
);
2462 /* Look for a label named ID in the current function. If one cannot
2463 be found, create one. (We keep track of used, but undefined,
2464 labels, and complain about them at the end of a function.) */
2467 lookup_label (tree id
)
2471 timevar_push (TV_NAME_LOOKUP
);
2472 /* You can't use labels at global scope. */
2473 if (current_function_decl
== NULL_TREE
)
2475 error ("label %qE referenced outside of any function", id
);
2476 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, NULL_TREE
);
2479 /* See if we've already got this label. */
2480 decl
= IDENTIFIER_LABEL_VALUE (id
);
2481 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2482 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2484 decl
= make_label_decl (id
, /*local_p=*/0);
2485 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2488 /* Declare a local label named ID. */
2491 declare_local_label (tree id
)
2495 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2496 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2497 shadow
= tree_cons (IDENTIFIER_LABEL_VALUE (id
), NULL_TREE
,
2498 current_binding_level
->shadowed_labels
);
2499 current_binding_level
->shadowed_labels
= shadow
;
2501 decl
= make_label_decl (id
, /*local_p=*/1);
2502 TREE_VALUE (shadow
) = decl
;
2507 /* Returns nonzero if it is ill-formed to jump past the declaration of
2508 DECL. Returns 2 if it's also a real problem. */
2511 decl_jump_unsafe (tree decl
)
2513 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2514 with automatic storage duration is not in scope to a point where it is
2515 in scope is ill-formed unless the variable has scalar type, class type
2516 with a trivial default constructor and a trivial destructor, a
2517 cv-qualified version of one of these types, or an array of one of the
2518 preceding types and is declared without an initializer (8.5). */
2519 tree type
= TREE_TYPE (decl
);
2521 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2522 || type
== error_mark_node
)
2525 type
= strip_array_types (type
);
2527 if (type_has_nontrivial_default_init (TREE_TYPE (decl
))
2528 || DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2531 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2537 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2540 identify_goto (tree decl
, const location_t
*locus
)
2543 permerror (input_location
, "jump to label %qD", decl
);
2545 permerror (input_location
, "jump to case label");
2547 permerror (*locus
, " from here");
2550 /* Check that a single previously seen jump to a newly defined label
2551 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2552 the jump context; NAMES are the names in scope in LEVEL at the jump
2553 context; LOCUS is the source position of the jump or 0. Returns
2554 true if all is well. */
2557 check_previous_goto_1 (tree decl
, struct cp_binding_level
* level
, tree names
,
2558 bool exited_omp
, const location_t
*locus
)
2560 struct cp_binding_level
*b
;
2561 bool identified
= false, saw_eh
= false, saw_omp
= false;
2565 identify_goto (decl
, locus
);
2566 error (" exits OpenMP structured block");
2567 identified
= saw_omp
= true;
2570 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2572 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2574 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2575 new_decls
= TREE_CHAIN (new_decls
))
2577 int problem
= decl_jump_unsafe (new_decls
);
2583 identify_goto (decl
, locus
);
2587 error (" crosses initialization of %q+#D", new_decls
);
2589 permerror (input_location
, " enters scope of %q+#D which has "
2590 "non-trivial destructor", new_decls
);
2595 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2599 identify_goto (decl
, locus
);
2602 if (b
->kind
== sk_try
)
2603 error (" enters try block");
2605 error (" enters catch block");
2608 if (b
->kind
== sk_omp
&& !saw_omp
)
2612 identify_goto (decl
, locus
);
2615 error (" enters OpenMP structured block");
2624 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2626 check_previous_goto_1 (decl
, use
->binding_level
,
2627 use
->names_in_scope
, use
->in_omp_scope
,
2628 &use
->o_goto_locus
);
2632 check_switch_goto (struct cp_binding_level
* level
)
2634 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2637 /* Check that a new jump to a label DECL is OK. Called by
2638 finish_goto_stmt. */
2641 check_goto (tree decl
)
2643 struct named_label_entry
*ent
, dummy
;
2644 bool saw_catch
= false, identified
= false;
2647 /* We can't know where a computed goto is jumping.
2648 So we assume that it's OK. */
2649 if (TREE_CODE (decl
) != LABEL_DECL
)
2652 /* We didn't record any information about this label when we created it,
2653 and there's not much point since it's trivial to analyze as a return. */
2654 if (decl
== cdtor_label
)
2657 dummy
.label_decl
= decl
;
2658 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2659 gcc_assert (ent
!= NULL
);
2661 /* If the label hasn't been defined yet, defer checking. */
2662 if (! DECL_INITIAL (decl
))
2664 struct named_label_use_entry
*new_use
;
2666 /* Don't bother creating another use if the last goto had the
2667 same data, and will therefore create the same set of errors. */
2669 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2672 new_use
= ggc_alloc_named_label_use_entry ();
2673 new_use
->binding_level
= current_binding_level
;
2674 new_use
->names_in_scope
= current_binding_level
->names
;
2675 new_use
->o_goto_locus
= input_location
;
2676 new_use
->in_omp_scope
= false;
2678 new_use
->next
= ent
->uses
;
2679 ent
->uses
= new_use
;
2683 if (ent
->in_try_scope
|| ent
->in_catch_scope
2684 || ent
->in_omp_scope
|| ent
->bad_decls
)
2686 permerror (input_location
, "jump to label %q+D", decl
);
2687 permerror (input_location
, " from here");
2691 for (bad
= ent
->bad_decls
; bad
; bad
= TREE_CHAIN (bad
))
2693 tree b
= TREE_VALUE (bad
);
2694 int u
= decl_jump_unsafe (b
);
2696 if (u
> 1 && DECL_ARTIFICIAL (b
))
2698 /* Can't skip init of __exception_info. */
2699 error_at (DECL_SOURCE_LOCATION (b
), " enters catch block");
2703 error (" skips initialization of %q+#D", b
);
2705 permerror (input_location
, " enters scope of %q+#D which has "
2706 "non-trivial destructor", b
);
2709 if (ent
->in_try_scope
)
2710 error (" enters try block");
2711 else if (ent
->in_catch_scope
&& !saw_catch
)
2712 error (" enters catch block");
2714 if (ent
->in_omp_scope
)
2715 error (" enters OpenMP structured block");
2716 else if (flag_openmp
)
2718 struct cp_binding_level
*b
;
2719 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2721 if (b
== ent
->binding_level
)
2723 if (b
->kind
== sk_omp
)
2727 permerror (input_location
, "jump to label %q+D", decl
);
2728 permerror (input_location
, " from here");
2731 error (" exits OpenMP structured block");
2738 /* Check that a return is ok wrt OpenMP structured blocks.
2739 Called by finish_return_stmt. Returns true if all is well. */
2742 check_omp_return (void)
2744 struct cp_binding_level
*b
;
2745 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2746 if (b
->kind
== sk_omp
)
2748 error ("invalid exit from OpenMP structured block");
2754 /* Define a label, specifying the location in the source file.
2755 Return the LABEL_DECL node for the label. */
2758 define_label (location_t location
, tree name
)
2760 struct named_label_entry
*ent
, dummy
;
2761 struct cp_binding_level
*p
;
2764 timevar_push (TV_NAME_LOOKUP
);
2766 decl
= lookup_label (name
);
2768 dummy
.label_decl
= decl
;
2769 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2770 gcc_assert (ent
!= NULL
);
2772 /* After labels, make any new cleanups in the function go into their
2773 own new (temporary) binding contour. */
2774 for (p
= current_binding_level
;
2775 p
->kind
!= sk_function_parms
;
2777 p
->more_cleanups_ok
= 0;
2779 if (name
== get_identifier ("wchar_t"))
2780 permerror (input_location
, "label named wchar_t");
2782 if (DECL_INITIAL (decl
) != NULL_TREE
)
2784 error ("duplicate label %qD", decl
);
2785 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
2789 struct named_label_use_entry
*use
;
2791 /* Mark label as having been defined. */
2792 DECL_INITIAL (decl
) = error_mark_node
;
2793 /* Say where in the source. */
2794 DECL_SOURCE_LOCATION (decl
) = location
;
2796 ent
->binding_level
= current_binding_level
;
2797 ent
->names_in_scope
= current_binding_level
->names
;
2799 for (use
= ent
->uses
; use
; use
= use
->next
)
2800 check_previous_goto (decl
, use
);
2804 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, decl
);
2809 struct cp_binding_level
*level
;
2810 struct cp_switch
*next
;
2811 /* The SWITCH_STMT being built. */
2813 /* A splay-tree mapping the low element of a case range to the high
2814 element, or NULL_TREE if there is no high element. Used to
2815 determine whether or not a new case label duplicates an old case
2816 label. We need a tree, rather than simply a hash table, because
2817 of the GNU case range extension. */
2821 /* A stack of the currently active switch statements. The innermost
2822 switch statement is on the top of the stack. There is no need to
2823 mark the stack for garbage collection because it is only active
2824 during the processing of the body of a function, and we never
2825 collect at that point. */
2827 static struct cp_switch
*switch_stack
;
2829 /* Called right after a switch-statement condition is parsed.
2830 SWITCH_STMT is the switch statement being parsed. */
2833 push_switch (tree switch_stmt
)
2835 struct cp_switch
*p
= XNEW (struct cp_switch
);
2836 p
->level
= current_binding_level
;
2837 p
->next
= switch_stack
;
2838 p
->switch_stmt
= switch_stmt
;
2839 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2846 struct cp_switch
*cs
= switch_stack
;
2847 location_t switch_location
;
2849 /* Emit warnings as needed. */
2850 if (EXPR_HAS_LOCATION (cs
->switch_stmt
))
2851 switch_location
= EXPR_LOCATION (cs
->switch_stmt
);
2853 switch_location
= input_location
;
2854 if (!processing_template_decl
)
2855 c_do_switch_warnings (cs
->cases
, switch_location
,
2856 SWITCH_STMT_TYPE (cs
->switch_stmt
),
2857 SWITCH_STMT_COND (cs
->switch_stmt
));
2859 splay_tree_delete (cs
->cases
);
2860 switch_stack
= switch_stack
->next
;
2864 /* Note that we've seen a definition of a case label, and complain if this
2865 is a bad place for one. */
2868 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
2871 struct cp_binding_level
*p
;
2873 if (processing_template_decl
)
2877 /* For templates, just add the case label; we'll do semantic
2878 analysis at instantiation-time. */
2879 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
2880 return add_stmt (build_case_label (loc
, low_value
, high_value
, label
));
2883 /* Find the condition on which this switch statement depends. */
2884 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
2885 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
2886 cond
= TREE_VALUE (cond
);
2888 if (!check_switch_goto (switch_stack
->level
))
2889 return error_mark_node
;
2891 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
,
2892 SWITCH_STMT_TYPE (switch_stack
->switch_stmt
),
2893 low_value
, high_value
);
2895 /* After labels, make any new cleanups in the function go into their
2896 own new (temporary) binding contour. */
2897 for (p
= current_binding_level
;
2898 p
->kind
!= sk_function_parms
;
2900 p
->more_cleanups_ok
= 0;
2905 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2908 typename_hash (const void* k
)
2911 const_tree
const t
= (const_tree
) k
;
2913 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
2914 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
2919 typedef struct typename_info
{
2927 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2928 really of type `typename_info*' */
2931 typename_compare (const void * k1
, const void * k2
)
2933 const_tree
const t1
= (const_tree
) k1
;
2934 const typename_info
*const t2
= (const typename_info
*) k2
;
2936 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
2937 && TYPE_CONTEXT (t1
) == t2
->scope
2938 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
2939 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
2940 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
2943 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2944 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2946 Returns the new TYPENAME_TYPE. */
2948 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
2951 build_typename_type (tree context
, tree name
, tree fullname
,
2952 enum tag_types tag_type
)
2960 if (typename_htab
== NULL
)
2961 typename_htab
= htab_create_ggc (61, &typename_hash
,
2962 &typename_compare
, NULL
);
2964 ti
.scope
= FROB_CONTEXT (context
);
2966 ti
.template_id
= fullname
;
2967 ti
.enum_p
= tag_type
== enum_type
;
2968 ti
.class_p
= (tag_type
== class_type
2969 || tag_type
== record_type
2970 || tag_type
== union_type
);
2971 hash
= (htab_hash_pointer (ti
.scope
)
2972 ^ htab_hash_pointer (ti
.name
));
2974 /* See if we already have this type. */
2975 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
2980 /* Build the TYPENAME_TYPE. */
2981 t
= cxx_make_type (TYPENAME_TYPE
);
2982 TYPE_CONTEXT (t
) = ti
.scope
;
2983 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
2984 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
2985 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
2987 /* Build the corresponding TYPE_DECL. */
2988 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
2989 TYPE_NAME (TREE_TYPE (d
)) = d
;
2990 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
2991 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
2992 DECL_ARTIFICIAL (d
) = 1;
2994 /* Store it in the hash table. */
2997 /* TYPENAME_TYPEs must always be compared structurally, because
2998 they may or may not resolve down to another type depending on
2999 the currently open classes. */
3000 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3006 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3007 provided to name the type. Returns an appropriate type, unless an
3008 error occurs, in which case error_mark_node is returned. If we
3009 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3010 return that, rather than the _TYPE it corresponds to, in other
3011 cases we look through the type decl. If TF_ERROR is set, complain
3012 about errors, otherwise be quiet. */
3015 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3016 tsubst_flags_t complain
)
3022 if (name
== error_mark_node
3023 || context
== NULL_TREE
3024 || context
== error_mark_node
)
3025 return error_mark_node
;
3029 if (!(TYPE_LANG_SPECIFIC (name
)
3030 && (CLASSTYPE_IS_TEMPLATE (name
)
3031 || CLASSTYPE_USE_TEMPLATE (name
))))
3032 name
= TYPE_IDENTIFIER (name
);
3034 /* Create a TEMPLATE_ID_EXPR for the type. */
3035 name
= build_nt (TEMPLATE_ID_EXPR
,
3036 CLASSTYPE_TI_TEMPLATE (name
),
3037 CLASSTYPE_TI_ARGS (name
));
3039 else if (TREE_CODE (name
) == TYPE_DECL
)
3040 name
= DECL_NAME (name
);
3044 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3046 name
= TREE_OPERAND (name
, 0);
3047 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3048 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3049 else if (TREE_CODE (name
) == OVERLOAD
)
3051 error ("%qD is not a type", name
);
3052 return error_mark_node
;
3055 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3057 error ("%qD used without template parameters", name
);
3058 return error_mark_node
;
3060 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3061 gcc_assert (TYPE_P (context
));
3063 if (!MAYBE_CLASS_TYPE_P (context
))
3065 if (complain
& tf_error
)
3066 error ("%q#T is not a class", context
);
3067 return error_mark_node
;
3070 /* When the CONTEXT is a dependent type, NAME could refer to a
3071 dependent base class of CONTEXT. But look inside it anyway
3072 if CONTEXT is a currently open scope, in case it refers to a
3073 member of the current instantiation or a non-dependent base;
3074 lookup will stop when we hit a dependent base. */
3075 if (!dependent_scope_p (context
))
3076 /* We should only set WANT_TYPE when we're a nested typename type.
3077 Then we can give better diagnostics if we find a non-type. */
3078 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3082 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3083 return build_typename_type (context
, name
, fullname
, tag_type
);
3085 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3089 if (complain
& tf_error
)
3090 error (want_template
? "no class template named %q#T in %q#T"
3091 : "no type named %q#T in %q#T", name
, context
);
3092 return error_mark_node
;
3095 /* Pull out the template from an injected-class-name (or multiple). */
3097 t
= maybe_get_template_decl_from_type_decl (t
);
3099 if (TREE_CODE (t
) == TREE_LIST
)
3101 if (complain
& tf_error
)
3103 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3104 print_candidates (t
);
3106 return error_mark_node
;
3109 if (want_template
&& !DECL_CLASS_TEMPLATE_P (t
))
3111 if (complain
& tf_error
)
3112 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3114 return error_mark_node
;
3116 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3118 if (complain
& tf_error
)
3119 error ("%<typename %T::%D%> names %q#T, which is not a type",
3121 return error_mark_node
;
3124 if (complain
& tf_error
)
3125 perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
);
3127 /* If we are currently parsing a template and if T is a typedef accessed
3128 through CONTEXT then we need to remember and check access of T at
3129 template instantiation time. */
3130 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3133 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3135 /*entering_scope=*/0,
3136 tf_warning_or_error
| tf_user
);
3138 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3144 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3145 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3146 in which case error_mark_node is returned.
3148 If PARM_LIST is non-NULL, also make sure that the template parameter
3149 list of TEMPLATE_DECL matches.
3151 If COMPLAIN zero, don't complain about any errors that occur. */
3154 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3155 tsubst_flags_t complain
)
3161 name
= TYPE_IDENTIFIER (name
);
3162 else if (DECL_P (name
))
3163 name
= DECL_NAME (name
);
3164 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3166 if (!dependent_type_p (context
)
3167 || currently_open_class (context
))
3169 tree tmpl
= NULL_TREE
;
3171 if (MAYBE_CLASS_TYPE_P (context
))
3172 tmpl
= lookup_field (context
, name
, 0, false);
3174 if (!tmpl
|| !DECL_CLASS_TEMPLATE_P (tmpl
))
3176 if (complain
& tf_error
)
3177 error ("no class template named %q#T in %q#T", name
, context
);
3178 return error_mark_node
;
3182 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3184 if (complain
& tf_error
)
3186 error ("template parameters do not match template");
3187 error ("%q+D declared here", tmpl
);
3189 return error_mark_node
;
3192 if (complain
& tf_error
)
3193 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
);
3198 /* Build the UNBOUND_CLASS_TEMPLATE. */
3199 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3200 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3201 TREE_TYPE (t
) = NULL_TREE
;
3202 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3204 /* Build the corresponding TEMPLATE_DECL. */
3205 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3206 TYPE_NAME (TREE_TYPE (d
)) = d
;
3207 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3208 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3209 DECL_ARTIFICIAL (d
) = 1;
3210 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3217 /* Push the declarations of builtin types into the namespace.
3218 RID_INDEX is the index of the builtin type in the array
3219 RID_POINTERS. NAME is the name used when looking up the builtin
3220 type. TYPE is the _TYPE node for the builtin type. */
3223 record_builtin_type (enum rid rid_index
,
3227 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3228 tree tdecl
= NULL_TREE
;
3230 if ((int) rid_index
< (int) RID_MAX
)
3231 rname
= ridpointers
[(int) rid_index
];
3233 tname
= get_identifier (name
);
3235 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3236 eliminated. Built-in types should not be looked up name; their
3237 names are keywords that the parser can recognize. However, there
3238 is code in c-common.c that uses identifier_global_value to look
3239 up built-in types by name. */
3242 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3243 DECL_ARTIFICIAL (tdecl
) = 1;
3244 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3250 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3251 DECL_ARTIFICIAL (tdecl
) = 1;
3253 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3256 if (!TYPE_NAME (type
))
3257 TYPE_NAME (type
) = tdecl
;
3260 debug_hooks
->type_decl (tdecl
, 0);
3263 /* Record one of the standard Java types.
3264 * Declare it as having the given NAME.
3265 * If SIZE > 0, it is the size of one of the integral types;
3266 * otherwise it is the negative of the size of one of the other types. */
3269 record_builtin_java_type (const char* name
, int size
)
3273 type
= build_nonstandard_integer_type (size
, 0);
3274 else if (size
> -32)
3277 /* "__java_char" or ""__java_boolean". */
3278 type
= build_nonstandard_integer_type (-size
, 1);
3279 /* Get the signed type cached and attached to the unsigned type,
3280 so it doesn't get garbage-collected at "random" times,
3281 causing potential codegen differences out of different UIDs
3282 and different alias set numbers. */
3283 stype
= build_nonstandard_integer_type (-size
, 0);
3284 TREE_CHAIN (type
) = stype
;
3285 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3288 { /* "__java_float" or ""__java_double". */
3289 type
= make_node (REAL_TYPE
);
3290 TYPE_PRECISION (type
) = - size
;
3293 record_builtin_type (RID_MAX
, name
, type
);
3294 decl
= TYPE_NAME (type
);
3296 /* Suppress generate debug symbol entries for these types,
3297 since for normal C++ they are just clutter.
3298 However, push_lang_context undoes this if extern "Java" is seen. */
3299 DECL_IGNORED_P (decl
) = 1;
3301 TYPE_FOR_JAVA (type
) = 1;
3305 /* Push a type into the namespace so that the back ends ignore it. */
3308 record_unknown_type (tree type
, const char* name
)
3310 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3311 TYPE_DECL
, get_identifier (name
), type
));
3312 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3313 DECL_IGNORED_P (decl
) = 1;
3314 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3315 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3316 TYPE_ALIGN (type
) = 1;
3317 TYPE_USER_ALIGN (type
) = 0;
3318 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3321 /* A string for which we should create an IDENTIFIER_NODE at
3324 typedef struct predefined_identifier
3326 /* The name of the identifier. */
3327 const char *const name
;
3328 /* The place where the IDENTIFIER_NODE should be stored. */
3330 /* Nonzero if this is the name of a constructor or destructor. */
3331 const int ctor_or_dtor_p
;
3332 } predefined_identifier
;
3334 /* Create all the predefined identifiers. */
3337 initialize_predefined_identifiers (void)
3339 const predefined_identifier
*pid
;
3341 /* A table of identifiers to create at startup. */
3342 static const predefined_identifier predefined_identifiers
[] = {
3343 { "C++", &lang_name_cplusplus
, 0 },
3344 { "C", &lang_name_c
, 0 },
3345 { "Java", &lang_name_java
, 0 },
3346 /* Some of these names have a trailing space so that it is
3347 impossible for them to conflict with names written by users. */
3348 { "__ct ", &ctor_identifier
, 1 },
3349 { "__base_ctor ", &base_ctor_identifier
, 1 },
3350 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3351 { "__dt ", &dtor_identifier
, 1 },
3352 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3353 { "__base_dtor ", &base_dtor_identifier
, 1 },
3354 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3355 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3356 { "nelts", &nelts_identifier
, 0 },
3357 { THIS_NAME
, &this_identifier
, 0 },
3358 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3359 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3360 { "_vptr", &vptr_identifier
, 0 },
3361 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3362 { "::", &global_scope_name
, 0 },
3363 { "std", &std_identifier
, 0 },
3367 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3369 *pid
->node
= get_identifier (pid
->name
);
3370 if (pid
->ctor_or_dtor_p
)
3371 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3375 /* Create the predefined scalar types of C,
3376 and some nodes representing standard constants (0, 1, (void *)0).
3377 Initialize the global binding level.
3378 Make definitions for built-in primitive functions. */
3381 cxx_init_decl_processing (void)
3384 tree void_ftype_ptr
;
3386 build_common_tree_nodes (flag_signed_char
);
3388 /* Create all the identifiers we need. */
3389 initialize_predefined_identifiers ();
3391 /* Create the global variables. */
3392 push_to_top_level ();
3394 current_function_decl
= NULL_TREE
;
3395 current_binding_level
= NULL
;
3396 /* Enter the global namespace. */
3397 gcc_assert (global_namespace
== NULL_TREE
);
3398 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3400 TREE_PUBLIC (global_namespace
) = 1;
3401 begin_scope (sk_namespace
, global_namespace
);
3403 current_lang_name
= NULL_TREE
;
3405 if (flag_visibility_ms_compat
)
3406 default_visibility
= VISIBILITY_HIDDEN
;
3409 current_lang_name
= lang_name_c
;
3411 /* Create the `std' namespace. */
3412 push_namespace (std_identifier
);
3413 std_node
= current_namespace
;
3416 c_common_nodes_and_builtins ();
3418 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3419 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3420 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3421 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3422 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3423 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3424 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3425 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3427 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3428 integer_three_node
= build_int_cst (NULL_TREE
, 3);
3430 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3431 truthvalue_type_node
= boolean_type_node
;
3432 truthvalue_false_node
= boolean_false_node
;
3433 truthvalue_true_node
= boolean_true_node
;
3435 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3436 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3437 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3440 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3443 delta_type_node
= ptrdiff_type_node
;
3444 vtable_index_type
= ptrdiff_type_node
;
3446 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3447 void_ftype
= build_function_type (void_type_node
, void_list_node
);
3448 void_ftype_ptr
= build_function_type (void_type_node
,
3449 tree_cons (NULL_TREE
,
3453 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3455 /* C++ extensions */
3457 unknown_type_node
= make_node (LANG_TYPE
);
3458 record_unknown_type (unknown_type_node
, "unknown type");
3460 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3461 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3463 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3465 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3466 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3468 init_list_type_node
= make_node (LANG_TYPE
);
3469 record_unknown_type (init_list_type_node
, "init list");
3472 /* Make sure we get a unique function type, so we can give
3473 its pointer type a name. (This wins for gdb.) */
3474 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3475 TREE_TYPE (vfunc_type
) = integer_type_node
;
3476 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3477 layout_type (vfunc_type
);
3479 vtable_entry_type
= build_pointer_type (vfunc_type
);
3481 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3484 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3485 layout_type (vtbl_type_node
);
3486 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3487 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3488 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3489 layout_type (vtbl_ptr_type_node
);
3490 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3492 push_namespace (get_identifier ("__cxxabiv1"));
3493 abi_node
= current_namespace
;
3496 global_type_node
= make_node (LANG_TYPE
);
3497 record_unknown_type (global_type_node
, "global type");
3500 current_lang_name
= lang_name_cplusplus
;
3503 tree newtype
, deltype
;
3504 tree ptr_ftype_sizetype
;
3508 = build_function_type (ptr_type_node
,
3509 tree_cons (NULL_TREE
,
3512 if (cxx_dialect
== cxx98
)
3515 tree bad_alloc_type_node
;
3516 tree bad_alloc_decl
;
3518 push_namespace (std_identifier
);
3519 bad_alloc_id
= get_identifier ("bad_alloc");
3520 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3521 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3523 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3524 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3528 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3531 new_eh_spec
= noexcept_false_spec
;
3533 newtype
= build_exception_variant (ptr_ftype_sizetype
, new_eh_spec
);
3534 deltype
= build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3535 push_cp_library_fn (NEW_EXPR
, newtype
);
3536 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3537 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3538 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3540 nullptr_type_node
= make_node (LANG_TYPE
);
3541 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3542 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3543 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3544 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3545 SET_TYPE_MODE (nullptr_type_node
, Pmode
);
3546 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3547 nullptr_node
= make_node (INTEGER_CST
);
3548 TREE_TYPE (nullptr_node
) = nullptr_type_node
;
3552 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3554 /* Perform other language dependent initializations. */
3555 init_class_processing ();
3556 init_rtti_processing ();
3557 init_template_processing ();
3559 if (flag_exceptions
)
3560 init_exception_processing ();
3562 if (! supports_one_only ())
3565 make_fname_decl
= cp_make_fname_decl
;
3566 start_fname_decls ();
3568 /* Show we use EH for cleanups. */
3569 if (flag_exceptions
)
3570 using_eh_for_cleanups ();
3573 /* Generate an initializer for a function naming variable from
3574 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3575 filled in with the type of the init. */
3578 cp_fname_init (const char* name
, tree
*type_p
)
3580 tree domain
= NULL_TREE
;
3582 tree init
= NULL_TREE
;
3587 length
= strlen (name
);
3588 domain
= build_index_type (size_int (length
));
3589 init
= build_string (length
+ 1, name
);
3592 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3593 type
= build_cplus_array_type (type
, domain
);
3598 TREE_TYPE (init
) = type
;
3600 init
= error_mark_node
;
3605 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3606 the decl, LOC is the location to give the decl, NAME is the
3607 initialization string and TYPE_DEP indicates whether NAME depended
3608 on the type of the function. We make use of that to detect
3609 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3610 at the point of first use, so we mustn't push the decl now. */
3613 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3615 const char *const name
= (type_dep
&& processing_template_decl
3616 ? NULL
: fname_as_string (type_dep
));
3618 tree init
= cp_fname_init (name
, &type
);
3619 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3622 free (CONST_CAST (char *, name
));
3624 /* As we're using pushdecl_with_scope, we must set the context. */
3625 DECL_CONTEXT (decl
) = current_function_decl
;
3626 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3628 TREE_STATIC (decl
) = 1;
3629 TREE_READONLY (decl
) = 1;
3630 DECL_ARTIFICIAL (decl
) = 1;
3632 TREE_USED (decl
) = 1;
3634 if (current_function_decl
)
3636 struct cp_binding_level
*b
= current_binding_level
;
3637 while (b
->level_chain
->kind
!= sk_function_parms
)
3639 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3640 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3641 LOOKUP_ONLYCONVERTING
);
3644 pushdecl_top_level_and_finish (decl
, init
);
3650 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3652 tree id
= DECL_NAME (decl
);
3653 const char *name
= IDENTIFIER_POINTER (id
);
3655 retrofit_lang_decl (decl
);
3657 DECL_ARTIFICIAL (decl
) = 1;
3658 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3659 SET_DECL_LANGUAGE (decl
, lang_c
);
3660 /* Runtime library routines are, by definition, available in an
3661 external shared object. */
3662 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3663 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3665 DECL_CONTEXT (decl
) = context
;
3668 pushdecl_top_level (decl
);
3672 /* A function in the user's namespace should have an explicit
3673 declaration before it is used. Mark the built-in function as
3674 anticipated but not actually declared. */
3675 if (name
[0] != '_' || name
[1] != '_')
3676 DECL_ANTICIPATED (decl
) = 1;
3677 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3679 size_t len
= strlen (name
);
3681 /* Treat __*_chk fortification functions as anticipated as well,
3682 unless they are __builtin_*. */
3683 if (len
> strlen ("___chk")
3684 && memcmp (name
+ len
- strlen ("_chk"),
3685 "_chk", strlen ("_chk") + 1) == 0)
3686 DECL_ANTICIPATED (decl
) = 1;
3693 cxx_builtin_function (tree decl
)
3695 tree id
= DECL_NAME (decl
);
3696 const char *name
= IDENTIFIER_POINTER (id
);
3697 /* All builtins that don't begin with an '_' should additionally
3698 go in the 'std' namespace. */
3701 tree decl2
= copy_node(decl
);
3702 push_namespace (std_identifier
);
3703 builtin_function_1 (decl2
, std_node
, false);
3707 return builtin_function_1 (decl
, NULL_TREE
, false);
3710 /* Like cxx_builtin_function, but guarantee the function is added to the global
3711 scope. This is to allow function specific options to add new machine
3712 dependent builtins when the target ISA changes via attribute((target(...)))
3713 which saves space on program startup if the program does not use non-generic
3717 cxx_builtin_function_ext_scope (tree decl
)
3720 tree id
= DECL_NAME (decl
);
3721 const char *name
= IDENTIFIER_POINTER (id
);
3722 /* All builtins that don't begin with an '_' should additionally
3723 go in the 'std' namespace. */
3726 tree decl2
= copy_node(decl
);
3727 push_namespace (std_identifier
);
3728 builtin_function_1 (decl2
, std_node
, true);
3732 return builtin_function_1 (decl
, NULL_TREE
, true);
3735 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3736 function. Not called directly. */
3739 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3741 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3742 DECL_EXTERNAL (fn
) = 1;
3743 TREE_PUBLIC (fn
) = 1;
3744 DECL_ARTIFICIAL (fn
) = 1;
3745 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3746 SET_DECL_LANGUAGE (fn
, lang_c
);
3747 /* Runtime library routines are, by definition, available in an
3748 external shared object. */
3749 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3750 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3754 /* Returns the _DECL for a library function with C linkage.
3755 We assume that such functions never throw; if this is incorrect,
3756 callers should unset TREE_NOTHROW. */
3759 build_library_fn (tree name
, tree type
)
3761 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
3762 TREE_NOTHROW (fn
) = 1;
3766 /* Returns the _DECL for a library function with C++ linkage. */
3769 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3771 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3772 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3773 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3774 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3778 /* Like build_library_fn, but takes a C string instead of an
3782 build_library_fn_ptr (const char* name
, tree type
)
3784 return build_library_fn (get_identifier (name
), type
);
3787 /* Like build_cp_library_fn, but takes a C string instead of an
3791 build_cp_library_fn_ptr (const char* name
, tree type
)
3793 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3796 /* Like build_library_fn, but also pushes the function so that we will
3797 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3798 may throw exceptions listed in RAISES. */
3801 push_library_fn (tree name
, tree type
, tree raises
)
3806 type
= build_exception_variant (type
, raises
);
3808 fn
= build_library_fn (name
, type
);
3809 pushdecl_top_level (fn
);
3813 /* Like build_cp_library_fn, but also pushes the function so that it
3814 will be found by normal lookup. */
3817 push_cp_library_fn (enum tree_code operator_code
, tree type
)
3819 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
3826 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3830 push_void_library_fn (tree name
, tree parmtypes
)
3832 tree type
= build_function_type (void_type_node
, parmtypes
);
3833 return push_library_fn (name
, type
, NULL_TREE
);
3836 /* Like push_library_fn, but also note that this function throws
3837 and does not return. Used for __throw_foo and the like. */
3840 push_throw_library_fn (tree name
, tree type
)
3842 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
3843 TREE_THIS_VOLATILE (fn
) = 1;
3844 TREE_NOTHROW (fn
) = 0;
3848 /* When we call finish_struct for an anonymous union, we create
3849 default copy constructors and such. But, an anonymous union
3850 shouldn't have such things; this function undoes the damage to the
3851 anonymous union type T.
3853 (The reason that we create the synthesized methods is that we don't
3854 distinguish `union { int i; }' from `typedef union { int i; } U'.
3855 The first is an anonymous union; the second is just an ordinary
3859 fixup_anonymous_aggr (tree t
)
3863 /* Wipe out memory of synthesized methods. */
3864 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
3865 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
3866 TYPE_HAS_INIT_REF (t
) = 0;
3867 TYPE_HAS_CONST_INIT_REF (t
) = 0;
3868 TYPE_HAS_ASSIGN_REF (t
) = 0;
3869 TYPE_HAS_CONST_ASSIGN_REF (t
) = 0;
3871 /* Splice the implicitly generated functions out of the TYPE_METHODS
3873 q
= &TYPE_METHODS (t
);
3876 if (DECL_ARTIFICIAL (*q
))
3877 *q
= TREE_CHAIN (*q
);
3879 q
= &TREE_CHAIN (*q
);
3882 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3883 if (TYPE_METHODS (t
))
3885 tree decl
= TYPE_MAIN_DECL (t
);
3887 if (TREE_CODE (t
) != UNION_TYPE
)
3888 error_at (DECL_SOURCE_LOCATION (decl
),
3889 "an anonymous struct cannot have function members");
3891 error_at (DECL_SOURCE_LOCATION (decl
),
3892 "an anonymous union cannot have function members");
3895 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3896 assignment operators (because they cannot have these methods themselves).
3897 For anonymous unions this is already checked because they are not allowed
3898 in any union, otherwise we have to check it. */
3899 if (TREE_CODE (t
) != UNION_TYPE
)
3903 for (field
= TYPE_FIELDS (t
); field
; field
= TREE_CHAIN (field
))
3904 if (TREE_CODE (field
) == FIELD_DECL
)
3906 type
= TREE_TYPE (field
);
3907 if (CLASS_TYPE_P (type
))
3909 if (TYPE_NEEDS_CONSTRUCTING (type
))
3910 error ("member %q+#D with constructor not allowed "
3911 "in anonymous aggregate", field
);
3912 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
3913 error ("member %q+#D with destructor not allowed "
3914 "in anonymous aggregate", field
);
3915 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type
))
3916 error ("member %q+#D with copy assignment operator "
3917 "not allowed in anonymous aggregate", field
);
3923 /* Make sure that a declaration with no declarator is well-formed, i.e.
3924 just declares a tagged type or anonymous union.
3926 Returns the type declared; or NULL_TREE if none. */
3929 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
3931 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
3932 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
3933 /* If a class, struct, or enum type is declared by the DECLSPECS
3934 (i.e, if a class-specifier, enum-specifier, or non-typename
3935 elaborated-type-specifier appears in the DECLSPECS),
3936 DECLARED_TYPE is set to the corresponding type. */
3937 tree declared_type
= NULL_TREE
;
3938 bool error_p
= false;
3940 if (declspecs
->multiple_types_p
)
3941 error ("multiple types in one declaration");
3942 else if (declspecs
->redefined_builtin_type
)
3944 if (!in_system_header
)
3945 permerror (input_location
, "redeclaration of C++ built-in type %qT",
3946 declspecs
->redefined_builtin_type
);
3951 && TYPE_P (declspecs
->type
)
3952 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
3953 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
3954 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
3955 declared_type
= declspecs
->type
;
3956 else if (declspecs
->type
== error_mark_node
)
3958 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
3959 permerror (input_location
, "declaration does not declare anything");
3960 /* Check for an anonymous union. */
3961 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
3962 && TYPE_ANONYMOUS_P (declared_type
))
3964 /* 7/3 In a simple-declaration, the optional init-declarator-list
3965 can be omitted only when declaring a class (clause 9) or
3966 enumeration (7.2), that is, when the decl-specifier-seq contains
3967 either a class-specifier, an elaborated-type-specifier with
3968 a class-key (9.1), or an enum-specifier. In these cases and
3969 whenever a class-specifier or enum-specifier is present in the
3970 decl-specifier-seq, the identifiers in these specifiers are among
3971 the names being declared by the declaration (as class-name,
3972 enum-names, or enumerators, depending on the syntax). In such
3973 cases, and except for the declaration of an unnamed bit-field (9.6),
3974 the decl-specifier-seq shall introduce one or more names into the
3975 program, or shall redeclare a name introduced by a previous
3976 declaration. [Example:
3977 enum { }; // ill-formed
3978 typedef class { }; // ill-formed
3982 error ("missing type-name in typedef-declaration");
3985 /* Anonymous unions are objects, so they can have specifiers. */;
3986 SET_ANON_AGGR_TYPE_P (declared_type
);
3988 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
3989 pedwarn (input_location
, OPT_pedantic
, "ISO C++ prohibits anonymous structs");
3994 if (declspecs
->specs
[(int)ds_inline
]
3995 || declspecs
->specs
[(int)ds_virtual
])
3996 error ("%qs can only be specified for functions",
3997 declspecs
->specs
[(int)ds_inline
]
3998 ? "inline" : "virtual");
4000 && (!current_class_type
4001 || current_scope () != current_class_type
))
4002 error ("%<friend%> can only be specified inside a class");
4003 else if (declspecs
->specs
[(int)ds_explicit
])
4004 error ("%<explicit%> can only be specified for constructors");
4005 else if (declspecs
->storage_class
)
4006 error ("a storage class can only be specified for objects "
4008 else if (declspecs
->specs
[(int)ds_const
]
4009 || declspecs
->specs
[(int)ds_volatile
]
4010 || declspecs
->specs
[(int)ds_restrict
]
4011 || declspecs
->specs
[(int)ds_thread
])
4012 error ("qualifiers can only be specified for objects "
4014 else if (saw_typedef
)
4015 warning (0, "%<typedef%> was ignored in this declaration");
4016 else if (declspecs
->specs
[(int) ds_constexpr
])
4017 error ("%<constexpr> cannot be used for type declarations");
4020 return declared_type
;
4023 /* Called when a declaration is seen that contains no names to declare.
4024 If its type is a reference to a structure, union or enum inherited
4025 from a containing scope, shadow that tag name for the current scope
4026 with a forward reference.
4027 If its type defines a new named structure or union
4028 or defines an enum, it is valid but we need not do anything here.
4029 Otherwise, it is an error.
4031 C++: may have to grok the declspecs to learn about static,
4032 complain for anonymous unions.
4034 Returns the TYPE declared -- or NULL_TREE if none. */
4037 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4039 tree t
= check_tag_decl (declspecs
);
4044 if (declspecs
->attributes
)
4046 warning (0, "attribute ignored in declaration of %q+#T", t
);
4047 warning (0, "attribute for %q+#T must follow the %qs keyword",
4048 t
, class_key_or_enum_as_string (t
));
4052 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4055 /* This is where the variables in an anonymous union are
4056 declared. An anonymous union declaration looks like:
4058 because there is no declarator after the union, the parser
4059 sends that declaration here. */
4060 if (ANON_AGGR_TYPE_P (t
))
4062 fixup_anonymous_aggr (t
);
4064 if (TYPE_FIELDS (t
))
4066 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4067 declspecs
, NORMAL
, 0, NULL
);
4068 finish_anon_union (decl
);
4075 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4078 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4079 const cp_declarator
*declarator
,
4080 bool is_template_arg
)
4084 enum decl_context context
4085 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4086 attrs
= type_specifiers
->attributes
;
4087 type_specifiers
->attributes
= NULL_TREE
;
4088 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4089 if (attrs
&& type
!= error_mark_node
)
4091 if (CLASS_TYPE_P (type
))
4092 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4093 "outside of definition", type
);
4094 else if (MAYBE_CLASS_TYPE_P (type
))
4095 /* A template type parameter or other dependent type. */
4096 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4097 "type %qT without an associated declaration", type
);
4099 cplus_decl_attributes (&type
, attrs
, 0);
4104 /* Process a DECLARATOR for a function-scope variable declaration,
4105 namespace-scope variable declaration, or function declaration.
4106 (Function definitions go through start_function; class member
4107 declarations appearing in the body of the class go through
4108 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4109 If an error occurs, the error_mark_node is returned instead.
4111 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4112 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4113 for an explicitly defaulted function, or SD_DELETED for an explicitly
4114 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4115 implicitly initialized via a default constructor. ATTRIBUTES and
4116 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4117 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4118 set, the caller is responsible for calling pop_scope. */
4121 start_decl (const cp_declarator
*declarator
,
4122 cp_decl_specifier_seq
*declspecs
,
4125 tree prefix_attributes
,
4126 tree
*pushed_scope_p
)
4133 *pushed_scope_p
= NULL_TREE
;
4135 /* An object declared as __attribute__((deprecated)) suppresses
4136 warnings of uses of other deprecated items. */
4137 if (lookup_attribute ("deprecated", attributes
))
4138 deprecated_state
= DEPRECATED_SUPPRESS
;
4140 attributes
= chainon (attributes
, prefix_attributes
);
4142 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4145 deprecated_state
= DEPRECATED_NORMAL
;
4147 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
4148 || decl
== error_mark_node
)
4149 return error_mark_node
;
4151 context
= DECL_CONTEXT (decl
);
4155 *pushed_scope_p
= push_scope (context
);
4157 /* We are only interested in class contexts, later. */
4158 if (TREE_CODE (context
) == NAMESPACE_DECL
)
4159 context
= NULL_TREE
;
4163 /* Is it valid for this decl to have an initializer at all?
4164 If not, set INITIALIZED to zero, which will indirectly
4165 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4166 switch (TREE_CODE (decl
))
4169 error ("typedef %qD is initialized (use decltype instead)", decl
);
4170 return error_mark_node
;
4173 if (initialized
== SD_DELETED
)
4174 /* We'll handle the rest of the semantics later, but we need to
4175 set this now so it's visible to duplicate_decls. */
4176 DECL_DELETED_FN (decl
) = 1;
4185 if (! toplevel_bindings_p ()
4186 && DECL_EXTERNAL (decl
))
4187 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4189 DECL_EXTERNAL (decl
) = 0;
4190 if (toplevel_bindings_p ())
4191 TREE_STATIC (decl
) = 1;
4194 /* If this is a typedef that names the class for linkage purposes
4195 (7.1.3p8), apply any attributes directly to the type. */
4196 if (TREE_CODE (decl
) == TYPE_DECL
4197 && TAGGED_TYPE_P (TREE_TYPE (decl
))
4198 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4199 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4203 /* Set attributes here so if duplicate decl, will have proper attributes. */
4204 cplus_decl_attributes (&decl
, attributes
, flags
);
4206 /* Dllimported symbols cannot be defined. Static data members (which
4207 can be initialized in-class and dllimported) go through grokfield,
4208 not here, so we don't need to exclude those decls when checking for
4210 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4212 error ("definition of %q#D is marked %<dllimport%>", decl
);
4213 DECL_DLLIMPORT_P (decl
) = 0;
4216 /* If #pragma weak was used, mark the decl weak now. */
4217 maybe_apply_pragma_weak (decl
);
4219 if (TREE_CODE (decl
) == FUNCTION_DECL
4220 && DECL_DECLARED_INLINE_P (decl
)
4221 && DECL_UNINLINABLE (decl
)
4222 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4223 warning (0, "inline function %q+D given attribute noinline", decl
);
4225 if (context
&& COMPLETE_TYPE_P (complete_type (context
)))
4227 if (TREE_CODE (decl
) == VAR_DECL
)
4229 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4230 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4231 error ("%q#D is not a static member of %q#T", decl
, context
);
4234 if (DECL_CONTEXT (field
) != context
)
4236 if (!same_type_p (DECL_CONTEXT (field
), context
))
4237 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4238 "to be defined as %<%T::%D%>",
4239 DECL_CONTEXT (field
), DECL_NAME (decl
),
4240 context
, DECL_NAME (decl
));
4241 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4243 if (processing_specialization
4244 && template_class_depth (context
) == 0
4245 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
4246 error ("template header not allowed in member definition "
4247 "of explicitly specialized class");
4248 /* Static data member are tricky; an in-class initialization
4249 still doesn't provide a definition, so the in-class
4250 declaration will have DECL_EXTERNAL set, but will have an
4251 initialization. Thus, duplicate_decls won't warn
4252 about this situation, and so we check here. */
4253 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4254 error ("duplicate initialization of %qD", decl
);
4255 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4257 if (declspecs
->specs
[(int) ds_constexpr
]
4258 && !DECL_DECLARED_CONSTEXPR_P (field
))
4259 error ("%qD declared %<constexpr%> outside its class", field
);
4264 tree field
= check_classfn (context
, decl
,
4265 (processing_template_decl
4266 > template_class_depth (context
))
4267 ? current_template_parms
4269 if (field
&& field
!= error_mark_node
4270 && duplicate_decls (decl
, field
,
4271 /*newdecl_is_friend=*/false))
4275 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4276 DECL_IN_AGGR_P (decl
) = 0;
4277 /* Do not mark DECL as an explicit specialization if it was not
4278 already marked as an instantiation; a declaration should
4279 never be marked as a specialization unless we know what
4280 template is being specialized. */
4281 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4283 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4285 /* [temp.expl.spec] An explicit specialization of a static data
4286 member of a template is a definition if the declaration
4287 includes an initializer; otherwise, it is a declaration.
4289 We check for processing_specialization so this only applies
4290 to the new specialization syntax. */
4291 if (!initialized
&& processing_specialization
)
4292 DECL_EXTERNAL (decl
) = 1;
4295 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
))
4296 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4299 if (!ensure_literal_type_for_constexpr_object (decl
))
4300 return error_mark_node
;
4303 was_public
= TREE_PUBLIC (decl
);
4305 /* Enter this declaration into the symbol table. */
4306 decl
= maybe_push_decl (decl
);
4308 if (processing_template_decl
)
4309 decl
= push_template_decl (decl
);
4310 if (decl
== error_mark_node
)
4311 return error_mark_node
;
4313 /* Tell the back end to use or not use .common as appropriate. If we say
4314 -fconserve-space, we want this to save .data space, at the expense of
4315 wrong semantics. If we say -fno-conserve-space, we want this to
4316 produce errors about redefs; to do this we force variables into the
4318 if (flag_conserve_space
4319 && TREE_CODE (decl
) == VAR_DECL
4320 && TREE_PUBLIC (decl
)
4321 && !DECL_THREAD_LOCAL_P (decl
)
4322 && !have_global_bss_p ())
4323 DECL_COMMON (decl
) = 1;
4325 if (TREE_CODE (decl
) == VAR_DECL
4326 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4327 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4329 /* This is a const variable with implicit 'static'. Set
4330 DECL_THIS_STATIC so we can tell it from variables that are
4331 !TREE_PUBLIC because of the anonymous namespace. */
4332 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)));
4333 DECL_THIS_STATIC (decl
) = 1;
4336 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4337 start_decl_1 (decl
, initialized
);
4342 /* Process the declaration of a variable DECL. INITIALIZED is true
4343 iff DECL is explicitly initialized. (INITIALIZED is false if the
4344 variable is initialized via an implicitly-called constructor.)
4345 This function must be called for ordinary variables (including, for
4346 example, implicit instantiations of templates), but must not be
4347 called for template declarations. */
4350 start_decl_1 (tree decl
, bool initialized
)
4354 bool aggregate_definition_p
;
4356 gcc_assert (!processing_template_decl
);
4358 if (error_operand_p (decl
))
4361 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4363 type
= TREE_TYPE (decl
);
4364 complete_p
= COMPLETE_TYPE_P (type
);
4365 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4367 /* If an explicit initializer is present, or if this is a definition
4368 of an aggregate, then we need a complete type at this point.
4369 (Scalars are always complete types, so there is nothing to
4370 check.) This code just sets COMPLETE_P; errors (if necessary)
4371 are issued below. */
4372 if ((initialized
|| aggregate_definition_p
)
4374 && COMPLETE_TYPE_P (complete_type (type
)))
4377 /* We will not yet have set TREE_READONLY on DECL if the type
4378 was "const", but incomplete, before this point. But, now, we
4379 have a complete type, so we can try again. */
4380 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4384 /* Is it valid for this decl to have an initializer at all? */
4386 /* Don't allow initializations for incomplete types except for
4387 arrays which might be completed by the initialization. */
4389 ; /* A complete type is ok. */
4390 else if (type_uses_auto (type
))
4391 ; /* An auto type is ok. */
4392 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4394 error ("variable %q#D has initializer but incomplete type", decl
);
4395 type
= TREE_TYPE (decl
) = error_mark_node
;
4397 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4399 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4400 error ("elements of array %q#D have incomplete type", decl
);
4401 /* else we already gave an error in start_decl. */
4404 else if (aggregate_definition_p
&& !complete_p
)
4406 if (type_uses_auto (type
))
4407 error ("declaration of %q#D has no initializer", decl
);
4409 error ("aggregate %q#D has incomplete type and cannot be defined",
4411 /* Change the type so that assemble_variable will give
4412 DECL an rtl we can live with: (mem (const_int 0)). */
4413 type
= TREE_TYPE (decl
) = error_mark_node
;
4416 /* Create a new scope to hold this declaration if necessary.
4417 Whether or not a new scope is necessary cannot be determined
4418 until after the type has been completed; if the type is a
4419 specialization of a class template it is not until after
4420 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4421 will be set correctly. */
4422 maybe_push_cleanup_level (type
);
4425 /* Handle initialization of references. DECL, TYPE, and INIT have the
4426 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4427 but will be set to a new CLEANUP_STMT if a temporary is created
4428 that must be destroyed subsequently.
4430 Returns an initializer expression to use to initialize DECL, or
4431 NULL if the initialization can be performed statically.
4433 Quotes on semantics can be found in ARM 8.4.3. */
4436 grok_reference_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
4440 if (init
== NULL_TREE
)
4442 if ((DECL_LANG_SPECIFIC (decl
) == 0
4443 || DECL_IN_AGGR_P (decl
) == 0)
4444 && ! DECL_THIS_EXTERN (decl
))
4445 error ("%qD declared as reference but not initialized", decl
);
4449 if (TREE_CODE (init
) == TREE_LIST
)
4450 init
= build_x_compound_expr_from_list (init
, "initializer");
4452 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4453 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4454 /* Note: default conversion is only called in very special cases. */
4455 init
= decay_conversion (init
);
4457 /* Convert INIT to the reference type TYPE. This may involve the
4458 creation of a temporary, whose lifetime must be the same as that
4459 of the reference. If so, a DECL_EXPR for the temporary will be
4460 added just after the DECL_EXPR for DECL. That's why we don't set
4461 DECL_INITIAL for local references (instead assigning to them
4462 explicitly); we need to allow the temporary to be initialized
4464 tmp
= initialize_reference (type
, init
, decl
, cleanup
, tf_warning_or_error
);
4466 if (tmp
== error_mark_node
)
4468 else if (tmp
== NULL_TREE
)
4470 error ("cannot initialize %qT from %qT", type
, TREE_TYPE (init
));
4474 if (TREE_STATIC (decl
) && !TREE_CONSTANT (tmp
))
4477 DECL_INITIAL (decl
) = tmp
;
4482 /* Subroutine of check_initializer. We're initializing a DECL of
4483 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4484 extend the lifetime of the underlying array to match that of the decl,
4485 just like for reference initialization. CLEANUP is as for
4486 grok_reference_init. */
4489 build_init_list_var_init (tree decl
, tree type
, tree init
, tree
*cleanup
)
4491 tree aggr_init
, array
, arrtype
;
4492 init
= perform_implicit_conversion (type
, init
, tf_warning_or_error
);
4493 if (error_operand_p (init
))
4494 return error_mark_node
;
4496 aggr_init
= TARGET_EXPR_INITIAL (init
);
4497 init
= build2 (INIT_EXPR
, type
, decl
, init
);
4499 array
= AGGR_INIT_EXPR_ARG (aggr_init
, 1);
4500 arrtype
= TREE_TYPE (array
);
4502 gcc_assert (TREE_CODE (array
) == ADDR_EXPR
);
4503 array
= TREE_OPERAND (array
, 0);
4504 /* If the array is constant, finish_compound_literal already made it a
4505 static variable and we don't need to do anything here. */
4506 if (decl
&& TREE_CODE (array
) == TARGET_EXPR
)
4509 tree var
= set_up_extended_ref_temp (decl
, array
, cleanup
, &subinit
);
4510 var
= build_address (var
);
4511 var
= convert (arrtype
, var
);
4512 AGGR_INIT_EXPR_ARG (aggr_init
, 1) = var
;
4513 init
= build2 (COMPOUND_EXPR
, TREE_TYPE (init
), subinit
, init
);
4518 /* Designated initializers in arrays are not supported in GNU C++.
4519 The parser cannot detect this error since it does not know whether
4520 a given brace-enclosed initializer is for a class type or for an
4521 array. This function checks that CE does not use a designated
4522 initializer. If it does, an error is issued. Returns true if CE
4523 is valid, i.e., does not have a designated initializer. */
4526 check_array_designated_initializer (const constructor_elt
*ce
)
4528 /* Designated initializers for array elements are not supported. */
4531 /* The parser only allows identifiers as designated
4533 if (ce
->index
== error_mark_node
)
4534 error ("name used in a GNU-style designated "
4535 "initializer for an array");
4538 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4539 error ("name %qD used in a GNU-style designated "
4540 "initializer for an array", ce
->index
);
4548 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4549 array until we finish parsing the initializer. If that's the
4550 situation we're in, update DECL accordingly. */
4553 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4555 tree type
= TREE_TYPE (decl
);
4557 if (TREE_CODE (type
) == ARRAY_TYPE
4558 && TYPE_DOMAIN (type
) == NULL_TREE
4559 && TREE_CODE (decl
) != TYPE_DECL
)
4561 /* do_default is really a C-ism to deal with tentative definitions.
4562 But let's leave it here to ease the eventual merge. */
4563 int do_default
= !DECL_EXTERNAL (decl
);
4564 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4567 /* Check that there are no designated initializers in INIT, as
4568 those are not supported in GNU C++, and as the middle-end
4569 will crash if presented with a non-numeric designated
4571 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4573 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4574 constructor_elt
*ce
;
4577 VEC_iterate (constructor_elt
, v
, i
, ce
);
4579 if (!check_array_designated_initializer (ce
))
4585 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4589 error ("initializer fails to determine size of %qD", decl
);
4590 TREE_TYPE (decl
) = error_mark_node
;
4592 else if (failure
== 2)
4596 error ("array size missing in %qD", decl
);
4597 TREE_TYPE (decl
) = error_mark_node
;
4599 /* If a `static' var's size isn't known, make it extern as
4600 well as static, so it does not get allocated. If it's not
4601 `static', then don't mark it extern; finish_incomplete_decl
4602 will give it a default size and it will get allocated. */
4603 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4604 DECL_EXTERNAL (decl
) = 1;
4606 else if (failure
== 3)
4608 error ("zero-size array %qD", decl
);
4609 TREE_TYPE (decl
) = error_mark_node
;
4613 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4615 relayout_decl (decl
);
4619 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4620 any appropriate error messages regarding the layout. */
4623 layout_var_decl (tree decl
)
4627 type
= TREE_TYPE (decl
);
4628 if (type
== error_mark_node
)
4631 /* If we haven't already layed out this declaration, do so now.
4632 Note that we must not call complete type for an external object
4633 because it's type might involve templates that we are not
4634 supposed to instantiate yet. (And it's perfectly valid to say
4635 `extern X x' for some incomplete type `X'.) */
4636 if (!DECL_EXTERNAL (decl
))
4637 complete_type (type
);
4638 if (!DECL_SIZE (decl
)
4639 && TREE_TYPE (decl
) != error_mark_node
4640 && (COMPLETE_TYPE_P (type
)
4641 || (TREE_CODE (type
) == ARRAY_TYPE
4642 && !TYPE_DOMAIN (type
)
4643 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4644 layout_decl (decl
, 0);
4646 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4648 /* An automatic variable with an incomplete type: that is an error.
4649 Don't talk about array types here, since we took care of that
4650 message in grokdeclarator. */
4651 error ("storage size of %qD isn't known", decl
);
4652 TREE_TYPE (decl
) = error_mark_node
;
4655 /* Keep this code around in case we later want to control debug info
4656 based on whether a type is "used". (jason 1999-11-11) */
4658 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4659 /* Let debugger know it should output info for this type. */
4660 note_debug_info_needed (ttype
);
4662 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4663 note_debug_info_needed (DECL_CONTEXT (decl
));
4666 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4667 && DECL_SIZE (decl
) != NULL_TREE
4668 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4670 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4671 constant_expression_warning (DECL_SIZE (decl
));
4674 error ("storage size of %qD isn't constant", decl
);
4675 TREE_TYPE (decl
) = error_mark_node
;
4680 /* If a local static variable is declared in an inline function, or if
4681 we have a weak definition, we must endeavor to create only one
4682 instance of the variable at link-time. */
4685 maybe_commonize_var (tree decl
)
4687 /* Static data in a function with comdat linkage also has comdat
4689 if (TREE_STATIC (decl
)
4690 /* Don't mess with __FUNCTION__. */
4691 && ! DECL_ARTIFICIAL (decl
)
4692 && DECL_FUNCTION_SCOPE_P (decl
)
4693 && vague_linkage_p (DECL_CONTEXT (decl
)))
4697 /* With weak symbols, we simply make the variable COMDAT;
4698 that will cause copies in multiple translations units to
4700 comdat_linkage (decl
);
4704 if (DECL_INITIAL (decl
) == NULL_TREE
4705 || DECL_INITIAL (decl
) == error_mark_node
)
4707 /* Without weak symbols, we can use COMMON to merge
4708 uninitialized variables. */
4709 TREE_PUBLIC (decl
) = 1;
4710 DECL_COMMON (decl
) = 1;
4714 /* While for initialized variables, we must use internal
4715 linkage -- which means that multiple copies will not
4717 TREE_PUBLIC (decl
) = 0;
4718 DECL_COMMON (decl
) = 0;
4719 warning_at (input_location
, 0,
4720 "sorry: semantics of inline function static "
4721 "data %q+#D are wrong (you'll wind up "
4722 "with multiple copies)", decl
);
4723 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4724 " you can work around this by removing "
4729 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4730 /* Set it up again; we might have set DECL_INITIAL since the last
4732 comdat_linkage (decl
);
4735 /* Issue an error message if DECL is an uninitialized const variable. */
4738 check_for_uninitialized_const_var (tree decl
)
4740 tree type
= strip_array_types (TREE_TYPE (decl
));
4742 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_DECLARED_CONSTEXPR_P (decl
)
4743 && DECL_INITIAL (decl
) == NULL
)
4744 error ("missing initializer for constexpr %qD", decl
);
4746 /* ``Unless explicitly declared extern, a const object does not have
4747 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4749 else if (TREE_CODE (decl
) == VAR_DECL
4750 && TREE_CODE (type
) != REFERENCE_TYPE
4751 && CP_TYPE_CONST_P (type
)
4752 && (!TYPE_NEEDS_CONSTRUCTING (type
)
4753 || !type_has_user_provided_default_constructor (type
))
4754 && !DECL_INITIAL (decl
))
4756 permerror (DECL_SOURCE_LOCATION (decl
),
4757 "uninitialized const %qD", decl
);
4759 if (CLASS_TYPE_P (type
)
4760 && !type_has_user_provided_default_constructor (type
))
4762 tree defaulted_ctor
;
4764 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
4765 "%q#T has no user-provided default constructor", type
);
4766 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
4768 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
4769 "constructor is not user-provided because it is "
4770 "explicitly defaulted in the class body");
4775 /* Structure holding the current initializer being processed by reshape_init.
4776 CUR is a pointer to the current element being processed, END is a pointer
4777 after the last element present in the initializer. */
4778 typedef struct reshape_iterator_t
4780 constructor_elt
*cur
;
4781 constructor_elt
*end
;
4784 static tree
reshape_init_r (tree
, reshape_iter
*, bool);
4786 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4787 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4788 initialized. If there are no more such fields, the return value
4792 next_initializable_field (tree field
)
4795 && (TREE_CODE (field
) != FIELD_DECL
4796 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4797 || DECL_ARTIFICIAL (field
)))
4798 field
= TREE_CHAIN (field
);
4803 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4804 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4805 INTEGER_CST representing the size of the array minus one (the maximum index),
4806 or NULL_TREE if the array was declared without specifying the size. D is
4807 the iterator within the constructor. */
4810 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
)
4813 bool sized_array_p
= (max_index
!= NULL_TREE
);
4814 unsigned HOST_WIDE_INT max_index_cst
= 0;
4815 unsigned HOST_WIDE_INT index
;
4817 /* The initializer for an array is always a CONSTRUCTOR. */
4818 new_init
= build_constructor (init_list_type_node
, NULL
);
4822 /* Minus 1 is used for zero sized arrays. */
4823 if (integer_all_onesp (max_index
))
4826 if (host_integerp (max_index
, 1))
4827 max_index_cst
= tree_low_cst (max_index
, 1);
4828 /* sizetype is sign extended, not zero extended. */
4830 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
4834 /* Loop until there are no more initializers. */
4836 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
4841 check_array_designated_initializer (d
->cur
);
4842 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false);
4843 if (elt_init
== error_mark_node
)
4844 return error_mark_node
;
4845 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), NULL_TREE
, elt_init
);
4851 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4852 Parameters are the same of reshape_init_r. */
4855 reshape_init_array (tree type
, reshape_iter
*d
)
4857 tree max_index
= NULL_TREE
;
4859 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
4861 if (TYPE_DOMAIN (type
))
4862 max_index
= array_type_nelts (type
);
4864 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
);
4867 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4868 Parameters are the same of reshape_init_r. */
4871 reshape_init_vector (tree type
, reshape_iter
*d
)
4873 tree max_index
= NULL_TREE
;
4876 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
4878 if (COMPOUND_LITERAL_P (d
->cur
->value
))
4880 tree value
= d
->cur
->value
;
4881 if (!same_type_p (TREE_TYPE (value
), type
))
4883 error ("invalid type %qT as initializer for a vector of type %qT",
4884 TREE_TYPE (d
->cur
->value
), type
);
4885 value
= error_mark_node
;
4891 /* For a vector, the representation type is a struct
4892 containing a single member which is an array of the
4893 appropriate size. */
4894 rtype
= TYPE_DEBUG_REPRESENTATION_TYPE (type
);
4895 if (rtype
&& TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype
))))
4896 max_index
= array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype
)));
4898 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
);
4901 /* Subroutine of reshape_init_r, processes the initializers for classes
4902 or union. Parameters are the same of reshape_init_r. */
4905 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
)
4910 gcc_assert (CLASS_TYPE_P (type
));
4912 /* The initializer for a class is always a CONSTRUCTOR. */
4913 new_init
= build_constructor (init_list_type_node
, NULL
);
4914 field
= next_initializable_field (TYPE_FIELDS (type
));
4920 An initializer for an aggregate member that is an
4921 empty class shall have the form of an empty
4922 initializer-list {}. */
4923 if (!first_initializer_p
)
4925 error ("initializer for %qT must be brace-enclosed", type
);
4926 return error_mark_node
;
4931 /* Loop through the initializable fields, gathering initializers. */
4932 while (d
->cur
!= d
->end
)
4936 /* Handle designated initializers, as an extension. */
4939 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
4941 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
4943 error ("%qT has no non-static data member named %qD", type
,
4945 return error_mark_node
;
4949 /* If we processed all the member of the class, we are done. */
4953 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
4954 /*first_initializer_p=*/false);
4955 if (field_init
== error_mark_node
)
4956 return error_mark_node
;
4958 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
4962 When a union is initialized with a brace-enclosed
4963 initializer, the braces shall only contain an
4964 initializer for the first member of the union. */
4965 if (TREE_CODE (type
) == UNION_TYPE
)
4968 field
= next_initializable_field (TREE_CHAIN (field
));
4974 /* Subroutine of reshape_init, which processes a single initializer (part of
4975 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4976 iterator within the CONSTRUCTOR which points to the initializer to process.
4977 FIRST_INITIALIZER_P is true if this is the first initializer of the
4978 outermost CONSTRUCTOR node. */
4981 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
)
4983 tree init
= d
->cur
->value
;
4985 if (error_operand_p (init
))
4986 return error_mark_node
;
4988 /* A non-aggregate type is always initialized with a single
4990 if (!CP_AGGREGATE_TYPE_P (type
))
4992 /* It is invalid to initialize a non-aggregate type with a
4993 brace-enclosed initializer before C++0x.
4994 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4995 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4996 a CONSTRUCTOR (with a record type). */
4997 if (TREE_CODE (init
) == CONSTRUCTOR
4998 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5000 if (SCALAR_TYPE_P (type
))
5002 error ("braces around scalar initializer for type %qT", type
);
5003 init
= error_mark_node
;
5006 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5015 All implicit type conversions (clause _conv_) are considered when
5016 initializing the aggregate member with an initializer from an
5017 initializer-list. If the initializer can initialize a member,
5018 the member is initialized. Otherwise, if the member is itself a
5019 non-empty subaggregate, brace elision is assumed and the
5020 initializer is considered for the initialization of the first
5021 member of the subaggregate. */
5022 if (TREE_CODE (init
) != CONSTRUCTOR
5023 /* But don't try this for the first initializer, since that would be
5024 looking through the outermost braces; A a2 = { a1 }; is not a
5025 valid aggregate initialization. */
5026 && !first_initializer_p
5027 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5028 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
)))
5034 /* [dcl.init.string]
5036 A char array (whether plain char, signed char, or unsigned char)
5037 can be initialized by a string-literal (optionally enclosed in
5038 braces); a wchar_t array can be initialized by a wide
5039 string-literal (optionally enclosed in braces). */
5040 if (TREE_CODE (type
) == ARRAY_TYPE
5041 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5043 tree str_init
= init
;
5045 /* Strip one level of braces if and only if they enclose a single
5046 element (as allowed by [dcl.init.string]). */
5047 if (!first_initializer_p
5048 && TREE_CODE (str_init
) == CONSTRUCTOR
5049 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
5051 str_init
= VEC_index (constructor_elt
,
5052 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
5055 /* If it's a string literal, then it's the initializer for the array
5056 as a whole. Otherwise, continue with normal initialization for
5057 array types (one value per array element). */
5058 if (TREE_CODE (str_init
) == STRING_CST
)
5065 /* The following cases are about aggregates. If we are not within a full
5066 initializer already, and there is not a CONSTRUCTOR, it means that there
5067 is a missing set of braces (that is, we are processing the case for
5068 which reshape_init exists). */
5069 if (!first_initializer_p
)
5071 if (TREE_CODE (init
) == CONSTRUCTOR
)
5073 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5074 /* There is no need to reshape pointer-to-member function
5075 initializers, as they are always constructed correctly
5076 by the front end. */
5078 else if (COMPOUND_LITERAL_P (init
))
5079 /* For a nested compound literal, there is no need to reshape since
5080 brace elision is not allowed. Even if we decided to allow it,
5081 we should add a call to reshape_init in finish_compound_literal,
5082 before calling digest_init, so changing this code would still
5083 not be necessary. */
5084 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5088 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5089 return reshape_init (type
, init
);
5093 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5097 /* Dispatch to specialized routines. */
5098 if (CLASS_TYPE_P (type
))
5099 return reshape_init_class (type
, d
, first_initializer_p
);
5100 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5101 return reshape_init_array (type
, d
);
5102 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5103 return reshape_init_vector (type
, d
);
5108 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5109 brace-enclosed aggregate initializer.
5111 INIT is the CONSTRUCTOR containing the list of initializers describing
5112 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5113 It may not presently match the shape of the TYPE; for example:
5115 struct S { int a; int b; };
5116 struct S a[] = { 1, 2, 3, 4 };
5118 Here INIT will hold a VEC of four elements, rather than a
5119 VEC of two elements, each itself a VEC of two elements. This
5120 routine transforms INIT from the former form into the latter. The
5121 revised CONSTRUCTOR node is returned. */
5124 reshape_init (tree type
, tree init
)
5126 VEC(constructor_elt
, gc
) *v
;
5130 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5132 v
= CONSTRUCTOR_ELTS (init
);
5134 /* An empty constructor does not need reshaping, and it is always a valid
5136 if (VEC_empty (constructor_elt
, v
))
5139 /* Recurse on this CONSTRUCTOR. */
5140 d
.cur
= VEC_index (constructor_elt
, v
, 0);
5141 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
5143 new_init
= reshape_init_r (type
, &d
, true);
5144 if (new_init
== error_mark_node
)
5145 return error_mark_node
;
5147 /* Make sure all the element of the constructor were used. Otherwise,
5148 issue an error about exceeding initializers. */
5150 error ("too many initializers for %qT", type
);
5155 /* Verify array initializer. Returns true if errors have been reported. */
5158 check_array_initializer (tree decl
, tree type
, tree init
)
5160 tree element_type
= TREE_TYPE (type
);
5162 /* The array type itself need not be complete, because the
5163 initializer may tell us how many elements are in the array.
5164 But, the elements of the array must be complete. */
5165 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5168 error ("elements of array %q#D have incomplete type", decl
);
5170 error ("elements of array %q#T have incomplete type", type
);
5173 /* It is not valid to initialize a VLA. */
5175 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5176 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5179 error ("variable-sized object %qD may not be initialized", decl
);
5181 error ("variable-sized compound literal");
5187 /* Subroutine of check_initializer; args are passed down from that function.
5188 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5191 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5194 int saved_stmts_are_full_exprs_p
= 0;
5195 if (building_stmt_tree ())
5197 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5198 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5200 init
= build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5201 if (building_stmt_tree ())
5202 current_stmt_tree ()->stmts_are_full_exprs_p
=
5203 saved_stmts_are_full_exprs_p
;
5207 /* Verify INIT (the initializer for DECL), and record the
5208 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5209 grok_reference_init.
5211 If the return value is non-NULL, it is an expression that must be
5212 evaluated dynamically to initialize DECL. */
5215 check_initializer (tree decl
, tree init
, int flags
, tree
*cleanup
)
5217 tree type
= TREE_TYPE (decl
);
5218 tree init_code
= NULL
;
5221 /* Things that are going to be initialized need to have complete
5223 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5225 if (type
== error_mark_node
)
5226 /* We will have already complained. */
5229 if (TREE_CODE (type
) == ARRAY_TYPE
)
5231 if (check_array_initializer (decl
, type
, init
))
5234 else if (!COMPLETE_TYPE_P (type
))
5236 error ("%qD has incomplete type", decl
);
5237 TREE_TYPE (decl
) = error_mark_node
;
5241 /* There is no way to make a variable-sized class type in GNU C++. */
5242 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5244 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5246 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
5247 if (SCALAR_TYPE_P (type
))
5251 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5252 init
= build_zero_init (type
, NULL_TREE
, false);
5254 else if (init_len
!= 1)
5256 error ("scalar object %qD requires one element in initializer",
5258 TREE_TYPE (decl
) = error_mark_node
;
5264 if (TREE_CODE (decl
) == CONST_DECL
)
5266 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5268 DECL_INITIAL (decl
) = init
;
5270 gcc_assert (init
!= NULL_TREE
);
5273 else if (!DECL_EXTERNAL (decl
) && TREE_CODE (type
) == REFERENCE_TYPE
)
5274 init
= grok_reference_init (decl
, type
, init
, cleanup
);
5277 /* Do not reshape constructors of vectors (they don't need to be
5279 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5281 if (is_std_init_list (type
))
5282 return build_init_list_var_init (decl
, type
, init
, cleanup
);
5283 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5285 /* Don't reshape if the class has constructors. */
5286 if (cxx_dialect
== cxx98
)
5287 error ("in C++98 %qD must be initialized by constructor, "
5291 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5293 error ("opaque vector types cannot be initialized");
5294 init
= error_mark_node
;
5297 init
= reshape_init (type
, init
);
5300 /* If DECL has an array type without a specific bound, deduce the
5301 array size from the initializer. */
5302 maybe_deduce_size_from_array_init (decl
, init
);
5303 type
= TREE_TYPE (decl
);
5304 if (type
== error_mark_node
)
5307 if (TYPE_NEEDS_CONSTRUCTING (type
)
5308 || (CLASS_TYPE_P (type
)
5309 && !BRACE_ENCLOSED_INITIALIZER_P (init
)))
5310 return build_aggr_init_full_exprs (decl
, init
, flags
);
5311 else if (TREE_CODE (init
) != TREE_VEC
)
5313 init_code
= store_init_value (decl
, init
, flags
);
5314 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5315 && DECL_INITIAL (decl
)
5316 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5317 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5318 warning (0, "array %qD initialized by parenthesized string literal %qE",
5319 decl
, DECL_INITIAL (decl
));
5323 else if (DECL_EXTERNAL (decl
))
5325 else if (TYPE_P (type
) && TYPE_NEEDS_CONSTRUCTING (type
))
5327 check_for_uninitialized_const_var (decl
);
5328 return build_aggr_init_full_exprs (decl
, init
, flags
);
5330 else if (MAYBE_CLASS_TYPE_P (core_type
= strip_array_types (type
)))
5332 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5333 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
))
5334 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5337 check_for_uninitialized_const_var (decl
);
5340 check_for_uninitialized_const_var (decl
);
5342 if (init
&& init
!= error_mark_node
)
5343 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5348 /* If DECL is not a local variable, give it RTL. */
5351 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5353 int toplev
= toplevel_bindings_p ();
5355 const char *filename
;
5357 /* Set the DECL_ASSEMBLER_NAME for the object. */
5360 /* The `register' keyword, when used together with an
5361 asm-specification, indicates that the variable should be
5362 placed in a particular register. */
5363 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5365 set_user_assembler_name (decl
, asmspec
);
5366 DECL_HARD_REGISTER (decl
) = 1;
5370 if (TREE_CODE (decl
) == FUNCTION_DECL
5371 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5372 set_builtin_user_assembler_name (decl
, asmspec
);
5373 set_user_assembler_name (decl
, asmspec
);
5377 /* Handle non-variables up front. */
5378 if (TREE_CODE (decl
) != VAR_DECL
)
5380 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5384 /* If we see a class member here, it should be a static data
5386 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5388 gcc_assert (TREE_STATIC (decl
));
5389 /* An in-class declaration of a static data member should be
5390 external; it is only a declaration, and not a definition. */
5391 if (init
== NULL_TREE
)
5392 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5395 /* We don't create any RTL for local variables. */
5396 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5399 /* We defer emission of local statics until the corresponding
5400 DECL_EXPR is expanded. */
5401 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5403 /* We try to defer namespace-scope static constants so that they are
5404 not emitted into the object file unnecessarily. */
5405 filename
= input_filename
;
5406 if (!DECL_VIRTUAL_P (decl
)
5407 && TREE_READONLY (decl
)
5408 && DECL_INITIAL (decl
) != NULL_TREE
5409 && DECL_INITIAL (decl
) != error_mark_node
5411 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5413 && !TREE_PUBLIC (decl
))
5415 /* Fool with the linkage of static consts according to #pragma
5417 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5418 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5420 TREE_PUBLIC (decl
) = 1;
5421 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5426 /* Likewise for template instantiations. */
5427 else if (DECL_LANG_SPECIFIC (decl
)
5428 && DECL_IMPLICIT_INSTANTIATION (decl
))
5431 /* If we're not deferring, go ahead and assemble the variable. */
5433 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5436 /* walk_tree helper for wrap_temporary_cleanups, below. */
5439 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5441 if (TYPE_P (*stmt_p
))
5447 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5449 tree guard
= (tree
)data
;
5450 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5452 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5453 /* Tell honor_protect_cleanup_actions to handle this as a separate
5455 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5457 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5463 /* We're initializing a local variable which has a cleanup GUARD. If there
5464 are any temporaries used in the initializer INIT of this variable, we
5465 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5466 variable will be cleaned up properly if one of them throws.
5468 Unfortunately, there's no way to express this properly in terms of
5469 nesting, as the regions for the temporaries overlap the region for the
5470 variable itself; if there are two temporaries, the variable needs to be
5471 the first thing destroyed if either of them throws. However, we only
5472 want to run the variable's cleanup if it actually got constructed. So
5473 we need to guard the temporary cleanups with the variable's cleanup if
5474 they are run on the normal path, but not if they are run on the
5475 exceptional path. We implement this by telling
5476 honor_protect_cleanup_actions to strip the variable cleanup from the
5477 exceptional path. */
5480 wrap_temporary_cleanups (tree init
, tree guard
)
5482 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5485 /* Generate code to initialize DECL (a local variable). */
5488 initialize_local_var (tree decl
, tree init
)
5490 tree type
= TREE_TYPE (decl
);
5494 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5495 || TREE_CODE (decl
) == RESULT_DECL
);
5496 gcc_assert (!TREE_STATIC (decl
));
5498 if (DECL_SIZE (decl
) == NULL_TREE
)
5500 /* If we used it already as memory, it must stay in memory. */
5501 DECL_INITIAL (decl
) = NULL_TREE
;
5502 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5506 if (type
== error_mark_node
)
5509 /* Compute and store the initial value. */
5510 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5511 if (TREE_USED (type
))
5512 DECL_READ_P (decl
) = 1;
5514 /* Generate a cleanup, if necessary. */
5515 cleanup
= cxx_maybe_build_cleanup (decl
);
5517 /* Perform the initialization. */
5520 int saved_stmts_are_full_exprs_p
;
5522 /* If we're only initializing a single object, guard the destructors
5523 of any temporaries used in its initializer with its destructor.
5524 This isn't right for arrays because each element initialization is
5525 a full-expression. */
5526 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5527 wrap_temporary_cleanups (init
, cleanup
);
5529 gcc_assert (building_stmt_tree ());
5530 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5531 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5532 finish_expr_stmt (init
);
5533 current_stmt_tree ()->stmts_are_full_exprs_p
=
5534 saved_stmts_are_full_exprs_p
;
5537 /* Set this to 0 so we can tell whether an aggregate which was
5538 initialized was ever used. Don't do this if it has a
5539 destructor, so we don't complain about the 'resource
5540 allocation is initialization' idiom. Now set
5541 attribute((unused)) on types so decls of that type will be
5542 marked used. (see TREE_USED, above.) */
5543 if (TYPE_NEEDS_CONSTRUCTING (type
)
5545 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5546 && DECL_NAME (decl
))
5547 TREE_USED (decl
) = 0;
5548 else if (already_used
)
5549 TREE_USED (decl
) = 1;
5552 finish_decl_cleanup (decl
, cleanup
);
5555 /* DECL is a VAR_DECL for a compiler-generated variable with static
5556 storage duration (like a virtual table) whose initializer is a
5557 compile-time constant. Initialize the variable and provide it to the
5561 initialize_artificial_var (tree decl
, VEC(constructor_elt
,gc
) *v
)
5564 gcc_assert (DECL_ARTIFICIAL (decl
));
5565 init
= build_constructor (TREE_TYPE (decl
), v
);
5566 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5567 DECL_INITIAL (decl
) = init
;
5568 DECL_INITIALIZED_P (decl
) = 1;
5569 determine_visibility (decl
);
5570 layout_var_decl (decl
);
5571 maybe_commonize_var (decl
);
5572 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5575 /* INIT is the initializer for a variable, as represented by the
5576 parser. Returns true iff INIT is value-dependent. */
5579 value_dependent_init_p (tree init
)
5581 if (TREE_CODE (init
) == TREE_LIST
)
5582 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5583 return any_value_dependent_elements_p (init
);
5584 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5585 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5587 VEC(constructor_elt
, gc
) *elts
;
5591 elts
= CONSTRUCTOR_ELTS (init
);
5592 nelts
= VEC_length (constructor_elt
, elts
);
5593 for (i
= 0; i
< nelts
; ++i
)
5594 if (value_dependent_init_p (VEC_index (constructor_elt
,
5599 /* It must be a simple expression, e.g., int i = 3; */
5600 return value_dependent_expression_p (init
);
5605 /* Finish processing of a declaration;
5606 install its line number and initial value.
5607 If the length of an array type is not known before,
5608 it must be determined now, from the initial value, or it is an error.
5610 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5611 true, then INIT is an integral constant expression.
5613 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5614 if the (init) syntax was used. */
5617 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5618 tree asmspec_tree
, int flags
)
5622 const char *asmspec
= NULL
;
5623 int was_readonly
= 0;
5624 bool var_definition_p
= false;
5625 int saved_processing_template_decl
;
5628 if (decl
== error_mark_node
)
5633 error ("assignment (not initialization) in declaration");
5637 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5638 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5639 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
5641 type
= TREE_TYPE (decl
);
5642 if (type
== error_mark_node
)
5645 /* Assume no cleanup is required. */
5646 cleanup
= NULL_TREE
;
5647 saved_processing_template_decl
= processing_template_decl
;
5649 /* If a name was specified, get the string. */
5650 if (global_scope_p (current_binding_level
))
5651 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
5652 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
5653 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
5655 if (current_class_type
5656 && CP_DECL_CONTEXT (decl
) == current_class_type
5657 && TYPE_BEING_DEFINED (current_class_type
)
5658 && (DECL_INITIAL (decl
) || init
))
5659 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
5661 auto_node
= type_uses_auto (type
);
5664 if (init
== NULL_TREE
)
5666 error ("declaration of %q#D has no initializer", decl
);
5667 TREE_TYPE (decl
) = error_mark_node
;
5670 if (TREE_CODE (init
) == TREE_LIST
)
5671 init
= build_x_compound_expr_from_list (init
, "initializer");
5672 if (describable_type (init
))
5674 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, init
, auto_node
);
5675 if (type
== error_mark_node
)
5680 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
5683 if (init
== ridpointers
[(int)RID_DELETE
])
5685 /* FIXME check this is 1st decl. */
5686 DECL_DELETED_FN (decl
) = 1;
5687 DECL_DECLARED_INLINE_P (decl
) = 1;
5688 DECL_INITIAL (decl
) = error_mark_node
;
5689 FOR_EACH_CLONE (clone
, decl
)
5691 DECL_DELETED_FN (clone
) = 1;
5692 DECL_DECLARED_INLINE_P (clone
) = 1;
5693 DECL_INITIAL (clone
) = error_mark_node
;
5697 else if (init
== ridpointers
[(int)RID_DEFAULT
])
5699 if (defaultable_fn_check (decl
))
5700 DECL_DEFAULTED_FN (decl
) = 1;
5702 DECL_INITIAL (decl
) = NULL_TREE
;
5706 if (processing_template_decl
)
5708 bool type_dependent_p
;
5710 /* Add this declaration to the statement-tree. */
5711 if (at_function_scope_p ())
5712 add_decl_expr (decl
);
5714 type_dependent_p
= dependent_type_p (type
);
5716 if (check_for_bare_parameter_packs (init
))
5719 DECL_INITIAL (decl
) = NULL_TREE
;
5722 if (init
&& init_const_expr_p
&& TREE_CODE (decl
) == VAR_DECL
)
5724 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
5725 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl
))
5726 TREE_CONSTANT (decl
) = 1;
5729 /* Generally, initializers in templates are expanded when the
5730 template is instantiated. But, if DECL is an integral
5731 constant static data member, then it can be used in future
5732 integral constant expressions, and its value must be
5735 && DECL_CLASS_SCOPE_P (decl
)
5736 && DECL_INTEGRAL_CONSTANT_VAR_P (decl
)
5737 && !type_dependent_p
5738 && !value_dependent_init_p (init
)))
5741 DECL_INITIAL (decl
) = init
;
5742 if (TREE_CODE (decl
) == VAR_DECL
5743 && !DECL_PRETTY_FUNCTION_P (decl
)
5744 && !type_dependent_p
)
5745 maybe_deduce_size_from_array_init (decl
, init
);
5749 if (TREE_CODE (init
) == TREE_LIST
)
5751 /* If the parenthesized-initializer form was used (e.g.,
5752 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5753 arguments. (There is generally only one.) We convert them
5756 for (; list
; list
= TREE_CHAIN (list
))
5758 tree elt
= TREE_VALUE (list
);
5759 TREE_VALUE (list
) = fold_non_dependent_expr (elt
);
5763 init
= fold_non_dependent_expr (init
);
5764 processing_template_decl
= 0;
5767 /* Take care of TYPE_DECLs up front. */
5768 if (TREE_CODE (decl
) == TYPE_DECL
)
5770 if (type
!= error_mark_node
5771 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
5773 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
5774 warning (0, "shadowing previous type declaration of %q#D", decl
);
5775 set_identifier_type_value (DECL_NAME (decl
), decl
);
5778 /* If we have installed this as the canonical typedef for this
5779 type, and that type has not been defined yet, delay emitting
5780 the debug information for it, as we will emit it later. */
5781 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
5782 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
5783 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
5785 rest_of_decl_compilation (decl
, DECL_CONTEXT (decl
) == NULL_TREE
,
5790 /* A reference will be modified here, as it is initialized. */
5791 if (! DECL_EXTERNAL (decl
)
5792 && TREE_READONLY (decl
)
5793 && TREE_CODE (type
) == REFERENCE_TYPE
)
5796 TREE_READONLY (decl
) = 0;
5799 if (TREE_CODE (decl
) == VAR_DECL
)
5801 /* Only variables with trivial initialization and destruction can
5802 have thread-local storage. */
5803 if (DECL_THREAD_LOCAL_P (decl
)
5804 && (type_has_nontrivial_default_init (TREE_TYPE (decl
))
5805 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
5806 error ("%qD cannot be thread-local because it has non-trivial "
5807 "type %qT", decl
, TREE_TYPE (decl
));
5808 /* If this is a local variable that will need a mangled name,
5809 register it now. We must do this before processing the
5810 initializer for the variable, since the initialization might
5811 require a guard variable, and since the mangled name of the
5812 guard variable will depend on the mangled name of this
5814 if (DECL_FUNCTION_SCOPE_P (decl
)
5815 && TREE_STATIC (decl
)
5816 && !DECL_ARTIFICIAL (decl
))
5818 push_local_name (decl
);
5819 if (DECL_CONSTRUCTOR_P (current_function_decl
)
5820 || DECL_DESTRUCTOR_P (current_function_decl
))
5821 /* Normally local_decls is populated during GIMPLE lowering,
5822 but [cd]tors are never actually compiled directly. We need
5823 to put statics on the list so we can deal with the label
5824 address extension. */
5825 cfun
->local_decls
= tree_cons (NULL_TREE
, decl
,
5829 /* Convert the initializer to the type of DECL, if we have not
5830 already initialized DECL. */
5831 if (!DECL_INITIALIZED_P (decl
)
5832 /* If !DECL_EXTERNAL then DECL is being defined. In the
5833 case of a static data member initialized inside the
5834 class-specifier, there can be an initializer even if DECL
5835 is *not* defined. */
5836 && (!DECL_EXTERNAL (decl
) || init
))
5838 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
5841 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5842 /* Allow libjava/prims.cc define primitive classes. */
5843 if (init
!= NULL_TREE
5844 || jclass
== NULL_TREE
5845 || TREE_CODE (jclass
) != TYPE_DECL
5846 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
5847 || !same_type_ignoring_top_level_qualifiers_p
5848 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
5849 error ("Java object %qD not allocated with %<new%>", decl
);
5854 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
5855 if (init_const_expr_p
)
5857 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
5858 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl
))
5859 TREE_CONSTANT (decl
) = 1;
5862 init
= check_initializer (decl
, init
, flags
, &cleanup
);
5863 /* Thread-local storage cannot be dynamically initialized. */
5864 if (DECL_THREAD_LOCAL_P (decl
) && init
)
5866 error ("%qD is thread-local and so cannot be dynamically "
5867 "initialized", decl
);
5871 /* Check that the initializer for a static data member was a
5872 constant. Although we check in the parser that the
5873 initializer is an integral constant expression, we do not
5874 simplify division-by-zero at the point at which it
5875 occurs. Therefore, in:
5877 struct S { static const int i = 7 / 0; };
5879 we issue an error at this point. It would
5880 probably be better to forbid division by zero in
5881 integral constant expressions. */
5882 if (DECL_EXTERNAL (decl
) && init
)
5884 error ("%qD cannot be initialized by a non-constant expression"
5885 " when being declared", decl
);
5886 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
5894 The memory occupied by any object of static storage
5895 duration is zero-initialized at program startup before
5896 any other initialization takes place.
5898 We cannot create an appropriate initializer until after
5899 the type of DECL is finalized. If DECL_INITIAL is set,
5900 then the DECL is statically initialized, and any
5901 necessary zero-initialization has already been performed. */
5902 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
5903 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
5904 /*nelts=*/NULL_TREE
,
5905 /*static_storage_p=*/true);
5906 /* Remember that the initialization for this variable has
5908 DECL_INITIALIZED_P (decl
) = 1;
5909 /* This declaration is the definition of this variable,
5910 unless we are initializing a static data member within
5911 the class specifier. */
5912 if (!DECL_EXTERNAL (decl
))
5913 var_definition_p
= true;
5915 /* If the variable has an array type, lay out the type, even if
5916 there is no initializer. It is valid to index through the
5917 array, and we must get TYPE_ALIGN set correctly on the array
5919 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5922 if (!processing_template_decl
5923 && TREE_STATIC (decl
)
5924 && !at_function_scope_p ()
5925 && current_function_decl
== NULL
)
5926 /* So decl is a global variable or a static member of a
5927 non local class. Record the types it uses
5928 so that we can decide later to emit debug info for them. */
5929 record_types_used_by_current_var_decl (decl
);
5931 else if (TREE_CODE (decl
) == FIELD_DECL
5932 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
5933 error ("non-static data member %qD has Java class type", decl
);
5935 /* Add this declaration to the statement-tree. This needs to happen
5936 after the call to check_initializer so that the DECL_EXPR for a
5937 reference temp is added before the DECL_EXPR for the reference itself. */
5938 if (at_function_scope_p ())
5939 add_decl_expr (decl
);
5941 /* Let the middle end know about variables and functions -- but not
5942 static data members in uninstantiated class templates. */
5943 if (!saved_processing_template_decl
5944 && (TREE_CODE (decl
) == VAR_DECL
5945 || TREE_CODE (decl
) == FUNCTION_DECL
))
5947 if (TREE_CODE (decl
) == VAR_DECL
)
5949 layout_var_decl (decl
);
5950 maybe_commonize_var (decl
);
5953 /* This needs to happen after the linkage is set. */
5954 determine_visibility (decl
);
5956 if (var_definition_p
&& TREE_STATIC (decl
))
5958 /* If a TREE_READONLY variable needs initialization
5959 at runtime, it is no longer readonly and we need to
5960 avoid MEM_READONLY_P being set on RTL created for it. */
5963 if (TREE_READONLY (decl
))
5964 TREE_READONLY (decl
) = 0;
5967 else if (was_readonly
)
5968 TREE_READONLY (decl
) = 1;
5971 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
5973 /* Check for abstractness of the type. Notice that there is no
5974 need to strip array types here since the check for those types
5975 is already done within create_array_type_for_decl. */
5976 if (TREE_CODE (type
) == FUNCTION_TYPE
5977 || TREE_CODE (type
) == METHOD_TYPE
)
5978 abstract_virtuals_error (decl
, TREE_TYPE (type
));
5980 abstract_virtuals_error (decl
, type
);
5982 if (TREE_TYPE (decl
) == error_mark_node
)
5983 /* No initialization required. */
5985 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
5989 if (init
== ridpointers
[(int)RID_DEFAULT
])
5991 /* An out-of-class default definition is defined at
5992 the point where it is explicitly defaulted. */
5993 if (DECL_INITIAL (decl
) == error_mark_node
)
5994 synthesize_method (decl
);
5997 error ("function %q#D is initialized like a variable", decl
);
5999 /* else no initialization required. */
6001 else if (DECL_EXTERNAL (decl
)
6002 && ! (DECL_LANG_SPECIFIC (decl
)
6003 && DECL_NOT_REALLY_EXTERN (decl
)))
6006 DECL_INITIAL (decl
) = init
;
6008 /* A variable definition. */
6009 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6010 /* Initialize the local variable. */
6011 initialize_local_var (decl
, init
);
6013 /* If a variable is defined, and then a subsequent
6014 definition with external linkage is encountered, we will
6015 get here twice for the same variable. We want to avoid
6016 calling expand_static_init more than once. For variables
6017 that are not static data members, we can call
6018 expand_static_init only when we actually process the
6019 initializer. It is not legal to redeclare a static data
6020 member, so this issue does not arise in that case. */
6021 else if (var_definition_p
&& TREE_STATIC (decl
))
6022 expand_static_init (decl
, init
);
6025 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6026 reference, insert it in the statement-tree now. */
6028 push_cleanup (decl
, cleanup
, false);
6031 processing_template_decl
= saved_processing_template_decl
;
6034 TREE_READONLY (decl
) = 1;
6037 /* Returns a declaration for a VAR_DECL as if:
6039 extern "C" TYPE NAME;
6041 had been seen. Used to create compiler-generated global
6045 declare_global_var (tree name
, tree type
)
6049 push_to_top_level ();
6050 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6051 TREE_PUBLIC (decl
) = 1;
6052 DECL_EXTERNAL (decl
) = 1;
6053 DECL_ARTIFICIAL (decl
) = 1;
6054 /* If the user has explicitly declared this variable (perhaps
6055 because the code we are compiling is part of a low-level runtime
6056 library), then it is possible that our declaration will be merged
6057 with theirs by pushdecl. */
6058 decl
= pushdecl (decl
);
6059 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6060 pop_from_top_level ();
6065 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6066 if "__cxa_atexit" is not being used) corresponding to the function
6067 to be called when the program exits. */
6070 get_atexit_fn_ptr_type (void)
6075 if (!atexit_fn_ptr_type_node
)
6077 if (flag_use_cxa_atexit
6078 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6079 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6080 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
6082 /* The parameter to "atexit" is "void (*)(void)". */
6083 arg_types
= void_list_node
;
6085 fn_type
= build_function_type (void_type_node
, arg_types
);
6086 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6089 return atexit_fn_ptr_type_node
;
6092 /* Returns a pointer to the `atexit' function. Note that if
6093 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6094 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6097 get_atexit_node (void)
6104 bool use_aeabi_atexit
;
6109 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6111 /* The declaration for `__cxa_atexit' is:
6113 int __cxa_atexit (void (*)(void *), void *, void *)
6115 We build up the argument types and then then function type
6118 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6119 /* First, build the pointer-to-function type for the first
6121 fn_ptr_type
= get_atexit_fn_ptr_type ();
6122 /* Then, build the rest of the argument types. */
6123 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, void_list_node
);
6124 if (use_aeabi_atexit
)
6126 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
6127 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
6131 arg_types
= tree_cons (NULL_TREE
, ptr_type_node
, arg_types
);
6132 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, arg_types
);
6134 /* And the final __cxa_atexit type. */
6135 fn_type
= build_function_type (integer_type_node
, arg_types
);
6136 fn_ptr_type
= build_pointer_type (fn_type
);
6137 if (use_aeabi_atexit
)
6138 name
= "__aeabi_atexit";
6140 name
= "__cxa_atexit";
6144 /* The declaration for `atexit' is:
6146 int atexit (void (*)());
6148 We build up the argument types and then then function type
6150 fn_ptr_type
= get_atexit_fn_ptr_type ();
6151 arg_types
= tree_cons (NULL_TREE
, fn_ptr_type
, void_list_node
);
6152 /* Build the final atexit type. */
6153 fn_type
= build_function_type (integer_type_node
, arg_types
);
6157 /* Now, build the function declaration. */
6158 push_lang_context (lang_name_c
);
6159 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6160 mark_used (atexit_fndecl
);
6161 pop_lang_context ();
6162 atexit_node
= decay_conversion (atexit_fndecl
);
6167 /* Returns the __dso_handle VAR_DECL. */
6170 get_dso_handle_node (void)
6172 if (dso_handle_node
)
6173 return dso_handle_node
;
6175 /* Declare the variable. */
6176 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6179 return dso_handle_node
;
6182 /* Begin a new function with internal linkage whose job will be simply
6183 to destroy some particular variable. */
6185 static GTY(()) int start_cleanup_cnt
;
6188 start_cleanup_fn (void)
6193 bool use_cxa_atexit
= flag_use_cxa_atexit
6194 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6196 push_to_top_level ();
6198 /* No need to mangle this. */
6199 push_lang_context (lang_name_c
);
6201 /* Build the name of the function. */
6202 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6203 /* Build the function declaration. */
6204 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6205 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6206 /* It's a function with internal linkage, generated by the
6208 TREE_PUBLIC (fndecl
) = 0;
6209 DECL_ARTIFICIAL (fndecl
) = 1;
6210 /* Make the function `inline' so that it is only emitted if it is
6211 actually needed. It is unlikely that it will be inlined, since
6212 it is only called via a function pointer, but we avoid unnecessary
6213 emissions this way. */
6214 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6215 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6216 /* Build the parameter. */
6221 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6222 DECL_CONTEXT (parmdecl
) = fndecl
;
6223 TREE_USED (parmdecl
) = 1;
6224 DECL_READ_P (parmdecl
) = 1;
6225 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6229 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6231 pop_lang_context ();
6233 return current_function_decl
;
6236 /* Finish the cleanup function begun by start_cleanup_fn. */
6239 end_cleanup_fn (void)
6241 expand_or_defer_fn (finish_function (0));
6243 pop_from_top_level ();
6246 /* Generate code to handle the destruction of DECL, an object with
6247 static storage duration. */
6250 register_dtor_fn (tree decl
)
6257 tree arg0
, arg1
= NULL_TREE
, arg2
= NULL_TREE
;
6259 type
= TREE_TYPE (decl
);
6260 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6261 return void_zero_node
;
6263 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6264 a class object, we can just pass the destructor to
6265 "__cxa_atexit"; we don't have to build a temporary function to do
6267 use_dtor
= (flag_use_cxa_atexit
6268 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()
6269 && CLASS_TYPE_P (type
));
6274 /* Find the destructor. */
6275 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6276 gcc_assert (idx
>= 0);
6277 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
6278 /* Make sure it is accessible. */
6279 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
);
6283 /* Call build_cleanup before we enter the anonymous function so
6284 that any access checks will be done relative to the current
6285 scope, rather than the scope of the anonymous function. */
6286 build_cleanup (decl
);
6288 /* Now start the function. */
6289 cleanup
= start_cleanup_fn ();
6291 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6292 to the original function, rather than the anonymous one. That
6293 will make the back end think that nested functions are in use,
6294 which causes confusion. */
6295 push_deferring_access_checks (dk_no_check
);
6296 fcall
= build_cleanup (decl
);
6297 pop_deferring_access_checks ();
6299 /* Create the body of the anonymous function. */
6300 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6301 finish_expr_stmt (fcall
);
6302 finish_compound_stmt (compound_stmt
);
6306 /* Call atexit with the cleanup function. */
6307 mark_used (cleanup
);
6308 cleanup
= build_address (cleanup
);
6309 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6315 /* We must convert CLEANUP to the type that "__cxa_atexit"
6317 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6318 /* "__cxa_atexit" will pass the address of DECL to the
6319 cleanup function. */
6321 addr
= build_address (decl
);
6322 /* The declared type of the parameter to "__cxa_atexit" is
6323 "void *". For plain "T*", we could just let the
6324 machinery in cp_build_function_call convert it -- but if the
6325 type is "cv-qualified T *", then we need to convert it
6326 before passing it in, to avoid spurious errors. */
6327 addr
= build_nop (ptr_type_node
, addr
);
6330 /* Since the cleanup functions we build ignore the address
6331 they're given, there's no reason to pass the actual address
6332 in, and, in general, it's cheaper to pass NULL than any
6334 addr
= null_pointer_node
;
6335 arg2
= cp_build_unary_op (ADDR_EXPR
, get_dso_handle_node (), 0,
6336 tf_warning_or_error
);
6337 if (targetm
.cxx
.use_aeabi_atexit ())
6350 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error
,
6351 arg0
, arg1
, arg2
, NULL_TREE
);
6354 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6355 is its initializer. Generate code to handle the construction
6356 and destruction of DECL. */
6359 expand_static_init (tree decl
, tree init
)
6361 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
6362 gcc_assert (TREE_STATIC (decl
));
6364 /* Some variables require no initialization. */
6366 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl
))
6367 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6370 if (DECL_FUNCTION_SCOPE_P (decl
))
6372 /* Emit code to perform this initialization but once. */
6373 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6374 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6375 tree guard
, guard_addr
;
6376 tree acquire_fn
, release_fn
, abort_fn
;
6379 /* Emit code to perform this initialization but once. This code
6382 static <type> guard;
6383 if (!guard.first_byte) {
6384 if (__cxa_guard_acquire (&guard)) {
6387 // Do initialization.
6388 flag = true; __cxa_guard_release (&guard);
6389 // Register variable for destruction at end of program.
6391 if (!flag) __cxa_guard_abort (&guard);
6395 Note that the `flag' variable is only set to 1 *after* the
6396 initialization is complete. This ensures that an exception,
6397 thrown during the construction, will cause the variable to
6398 reinitialized when we pass through this code again, as per:
6402 If the initialization exits by throwing an exception, the
6403 initialization is not complete, so it will be tried again
6404 the next time control enters the declaration.
6406 This process should be thread-safe, too; multiple threads
6407 should not be able to initialize the variable more than
6410 /* Create the guard variable. */
6411 guard
= get_guard (decl
);
6413 /* This optimization isn't safe on targets with relaxed memory
6414 consistency. On such targets we force synchronization in
6415 __cxa_guard_acquire. */
6416 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6418 /* Begin the conditional initialization. */
6419 if_stmt
= begin_if_stmt ();
6420 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6421 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6424 if (flag_threadsafe_statics
)
6426 guard_addr
= build_address (guard
);
6428 acquire_fn
= get_identifier ("__cxa_guard_acquire");
6429 release_fn
= get_identifier ("__cxa_guard_release");
6430 abort_fn
= get_identifier ("__cxa_guard_abort");
6431 if (!get_global_value_if_present (acquire_fn
, &acquire_fn
))
6433 tree argtypes
= tree_cons (NULL_TREE
, TREE_TYPE (guard_addr
),
6435 tree vfntype
= build_function_type (void_type_node
, argtypes
);
6436 acquire_fn
= push_library_fn
6437 (acquire_fn
, build_function_type (integer_type_node
, argtypes
),
6439 release_fn
= push_library_fn (release_fn
, vfntype
, NULL_TREE
);
6440 abort_fn
= push_library_fn (abort_fn
, vfntype
, NULL_TREE
);
6444 release_fn
= identifier_global_value (release_fn
);
6445 abort_fn
= identifier_global_value (abort_fn
);
6448 inner_if_stmt
= begin_if_stmt ();
6449 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6452 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6453 begin
= get_target_expr (boolean_false_node
);
6454 flag
= TARGET_EXPR_SLOT (begin
);
6456 TARGET_EXPR_CLEANUP (begin
)
6457 = build3 (COND_EXPR
, void_type_node
, flag
,
6459 build_call_n (abort_fn
, 1, guard_addr
));
6460 CLEANUP_EH_ONLY (begin
) = 1;
6462 /* Do the initialization itself. */
6463 init
= add_stmt_to_compound (begin
, init
);
6464 init
= add_stmt_to_compound
6465 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
6466 init
= add_stmt_to_compound
6467 (init
, build_call_n (release_fn
, 1, guard_addr
));
6470 init
= add_stmt_to_compound (init
, set_guard (guard
));
6472 /* Use atexit to register a function for destroying this static
6474 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
6476 finish_expr_stmt (init
);
6478 if (flag_threadsafe_statics
)
6480 finish_compound_stmt (inner_then_clause
);
6481 finish_then_clause (inner_if_stmt
);
6482 finish_if_stmt (inner_if_stmt
);
6485 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6487 finish_compound_stmt (then_clause
);
6488 finish_then_clause (if_stmt
);
6489 finish_if_stmt (if_stmt
);
6493 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
6497 /* Make TYPE a complete type based on INITIAL_VALUE.
6498 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6499 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6500 3 if the initializer list is empty (in pedantic mode). */
6503 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
6506 tree type
, elt_type
;
6510 unsigned HOST_WIDE_INT i
;
6513 /* An array of character type can be initialized from a
6514 brace-enclosed string constant.
6516 FIXME: this code is duplicated from reshape_init. Probably
6517 we should just call reshape_init here? */
6518 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
6519 && TREE_CODE (initial_value
) == CONSTRUCTOR
6520 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
6522 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
6523 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
6525 if (TREE_CODE (value
) == STRING_CST
6526 && VEC_length (constructor_elt
, v
) == 1)
6527 initial_value
= value
;
6530 /* If any of the elements are parameter packs, we can't actually
6531 complete this type now because the array size is dependent. */
6532 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
6534 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
6537 if (PACK_EXPANSION_P (value
))
6543 failure
= complete_array_type (ptype
, initial_value
, do_default
);
6545 /* We can create the array before the element type is complete, which
6546 means that we didn't have these two bits set in the original type
6547 either. In completing the type, we are expected to propagate these
6548 bits. See also complete_type which does the same thing for arrays
6551 if (TYPE_DOMAIN (type
))
6553 elt_type
= TREE_TYPE (type
);
6554 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
6555 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
6556 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
6562 /* Return zero if something is declared to be a member of type
6563 CTYPE when in the context of CUR_TYPE. STRING is the error
6564 message to print in that case. Otherwise, quietly return 1. */
6567 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
6569 if (ctype
&& ctype
!= cur_type
)
6571 if (flags
== DTOR_FLAG
)
6572 error ("destructor for alien class %qT cannot be a member", ctype
);
6574 error ("constructor for alien class %qT cannot be a member", ctype
);
6580 /* Subroutine of `grokdeclarator'. */
6582 /* Generate errors possibly applicable for a given set of specifiers.
6583 This is for ARM $7.1.2. */
6586 bad_specifiers (tree object
,
6595 error ("%qD declared as a %<virtual%> %s", object
, type
);
6597 error ("%qD declared as an %<inline%> %s", object
, type
);
6599 error ("%<const%> and %<volatile%> function specifiers on "
6600 "%qD invalid in %s declaration",
6603 error ("%q+D declared as a friend", object
);
6605 && (TREE_CODE (object
) == TYPE_DECL
6606 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
6607 && !TYPE_REFFN_P (TREE_TYPE (object
))
6608 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
6609 error ("%q+D declared with an exception specification", object
);
6612 /* DECL is a member function or static data member and is presently
6613 being defined. Check that the definition is taking place in a
6617 check_class_member_definition_namespace (tree decl
)
6619 /* These checks only apply to member functions and static data
6621 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
6622 || TREE_CODE (decl
) == VAR_DECL
);
6623 /* We check for problems with specializations in pt.c in
6624 check_specialization_namespace, where we can issue better
6626 if (processing_specialization
)
6628 /* There are no restrictions on the placement of
6629 explicit instantiations. */
6630 if (processing_explicit_instantiation
)
6634 A member function definition that appears outside of the
6635 class definition shall appear in a namespace scope enclosing
6636 the class definition.
6640 The definition for a static data member shall appear in a
6641 namespace scope enclosing the member's class definition. */
6642 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
6643 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
6644 decl
, DECL_CONTEXT (decl
));
6647 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6648 METHOD_TYPE for a non-static member function; QUALS are the
6649 cv-qualifiers that apply to the function. */
6652 build_this_parm (tree type
, cp_cv_quals quals
)
6657 cp_cv_quals this_quals
;
6659 this_type
= TREE_VALUE (TYPE_ARG_TYPES (type
));
6660 /* The `this' parameter is implicitly `const'; it cannot be
6662 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
6663 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
6664 parm
= build_artificial_parm (this_identifier
, qual_type
);
6665 cp_apply_type_quals_to_decl (this_quals
, parm
);
6669 /* CTYPE is class type, or null if non-class.
6670 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6672 DECLARATOR is the function's name.
6673 PARMS is a chain of PARM_DECLs for the function.
6674 VIRTUALP is truthvalue of whether the function is virtual or not.
6675 FLAGS are to be passed through to `grokclassfn'.
6676 QUALS are qualifiers indicating whether the function is `const'
6678 RAISES is a list of exceptions that this function can raise.
6679 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6680 not look, and -1 if we should not call `grokclassfn' at all.
6682 SFK is the kind of special function (if any) for the new function.
6684 Returns `NULL_TREE' if something goes wrong, after issuing
6685 applicable error messages. */
6688 grokfndecl (tree ctype
,
6692 tree orig_declarator
,
6694 enum overload_flags flags
,
6701 special_function_kind sfk
,
6706 location_t location
)
6709 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
6713 type
= build_exception_variant (type
, raises
);
6715 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
6717 /* If we have an explicit location, use it, otherwise use whatever
6718 build_lang_decl used (probably input_location). */
6719 if (location
!= UNKNOWN_LOCATION
)
6720 DECL_SOURCE_LOCATION (decl
) = location
;
6722 if (TREE_CODE (type
) == METHOD_TYPE
)
6725 parm
= build_this_parm (type
, quals
);
6726 TREE_CHAIN (parm
) = parms
;
6729 DECL_ARGUMENTS (decl
) = parms
;
6730 for (t
= parms
; t
; t
= TREE_CHAIN (t
))
6731 DECL_CONTEXT (t
) = decl
;
6732 /* Propagate volatile out from type to decl. */
6733 if (TYPE_VOLATILE (type
))
6734 TREE_THIS_VOLATILE (decl
) = 1;
6736 /* Setup decl according to sfk. */
6739 case sfk_constructor
:
6740 case sfk_copy_constructor
:
6741 case sfk_move_constructor
:
6742 DECL_CONSTRUCTOR_P (decl
) = 1;
6744 case sfk_destructor
:
6745 DECL_DESTRUCTOR_P (decl
) = 1;
6751 /* If pointers to member functions use the least significant bit to
6752 indicate whether a function is virtual, ensure a pointer
6753 to this function will have that bit clear. */
6754 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
6755 && TREE_CODE (type
) == METHOD_TYPE
6756 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
6757 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
6760 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
6764 ("defining explicit specialization %qD in friend declaration",
6768 tree fns
= TREE_OPERAND (orig_declarator
, 0);
6769 tree args
= TREE_OPERAND (orig_declarator
, 1);
6771 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6773 /* Something like `template <class T> friend void f<T>()'. */
6774 error ("invalid use of template-id %qD in declaration "
6775 "of primary template",
6781 /* A friend declaration of the form friend void f<>(). Record
6782 the information in the TEMPLATE_ID_EXPR. */
6783 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
6785 if (TREE_CODE (fns
) == COMPONENT_REF
)
6787 /* Due to bison parser ickiness, we will have already looked
6788 up an operator_name or PFUNCNAME within the current class
6789 (see template_id in parse.y). If the current class contains
6790 such a name, we'll get a COMPONENT_REF here. Undo that. */
6792 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
6793 == current_class_type
);
6794 fns
= TREE_OPERAND (fns
, 1);
6796 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
6797 || TREE_CODE (fns
) == OVERLOAD
);
6798 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
6800 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
6801 if (TREE_PURPOSE (t
)
6802 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
6804 error ("default arguments are not allowed in declaration "
6805 "of friend template specialization %qD",
6812 error ("%<inline%> is not allowed in declaration of friend "
6813 "template specialization %qD",
6820 /* If this decl has namespace scope, set that up. */
6822 set_decl_namespace (decl
, in_namespace
, friendp
);
6824 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
6826 /* `main' and builtins have implicit 'C' linkage. */
6827 if ((MAIN_NAME_P (declarator
)
6828 || (IDENTIFIER_LENGTH (declarator
) > 10
6829 && IDENTIFIER_POINTER (declarator
)[0] == '_'
6830 && IDENTIFIER_POINTER (declarator
)[1] == '_'
6831 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
6832 && current_lang_name
== lang_name_cplusplus
6833 && ctype
== NULL_TREE
6834 /* NULL_TREE means global namespace. */
6835 && DECL_CONTEXT (decl
) == NULL_TREE
)
6836 SET_DECL_LANGUAGE (decl
, lang_c
);
6838 /* Should probably propagate const out from type to decl I bet (mrs). */
6841 DECL_STATIC_FUNCTION_P (decl
) = 1;
6842 DECL_CONTEXT (decl
) = ctype
;
6847 DECL_CONTEXT (decl
) = ctype
;
6849 check_class_member_definition_namespace (decl
);
6852 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
6854 if (processing_template_decl
)
6855 error ("cannot declare %<::main%> to be a template");
6857 error ("cannot declare %<::main%> to be inline");
6859 error ("cannot declare %<::main%> to be static");
6864 /* Members of anonymous types and local classes have no linkage; make
6865 them internal. If a typedef is made later, this will be changed. */
6866 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
6867 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
6870 if (publicp
&& cxx_dialect
== cxx98
)
6872 /* [basic.link]: A name with no linkage (notably, the name of a class
6873 or enumeration declared in a local scope) shall not be used to
6874 declare an entity with linkage.
6876 DR 757 relaxes this restriction for C++0x. */
6877 t
= no_linkage_check (TREE_TYPE (decl
),
6878 /*relaxed_p=*/false);
6881 if (TYPE_ANONYMOUS_P (t
))
6883 if (DECL_EXTERN_C_P (decl
))
6884 /* Allow this; it's pretty common in C. */;
6887 permerror (input_location
, "anonymous type with no linkage "
6888 "used to declare function %q#D with linkage",
6890 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
6891 permerror (input_location
, "%q+#D does not refer to the unqualified "
6892 "type, so it is not used for linkage",
6897 permerror (input_location
, "type %qT with no linkage used to "
6898 "declare function %q#D with linkage", t
, decl
);
6902 TREE_PUBLIC (decl
) = publicp
;
6905 DECL_INTERFACE_KNOWN (decl
) = 1;
6906 DECL_NOT_REALLY_EXTERN (decl
) = 1;
6909 /* If the declaration was declared inline, mark it as such. */
6911 DECL_DECLARED_INLINE_P (decl
) = 1;
6913 DECL_EXTERNAL (decl
) = 1;
6914 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
6917 ? G_("static member function %qD cannot have cv-qualifier")
6918 : G_("non-member function %qD cannot have cv-qualifier"),
6920 quals
= TYPE_UNQUALIFIED
;
6923 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
6924 && !grok_op_properties (decl
, /*complain=*/true))
6928 /* Make the init_value nonzero so pushdecl knows this is not
6929 tentative. error_mark_node is replaced later with the BLOCK. */
6930 DECL_INITIAL (decl
) = error_mark_node
;
6932 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
6933 TREE_NOTHROW (decl
) = 1;
6935 /* Caller will do the rest of this. */
6939 if (ctype
!= NULL_TREE
)
6940 grokclassfn (ctype
, decl
, flags
);
6942 decl
= check_explicit_specialization (orig_declarator
, decl
,
6945 4 * (friendp
!= 0));
6946 if (decl
== error_mark_node
)
6951 cplus_decl_attributes (&decl
, *attrlist
, 0);
6952 *attrlist
= NULL_TREE
;
6955 /* Check main's type after attributes have been applied. */
6956 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
6958 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
6961 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
6963 error ("%<::main%> must return %<int%>");
6964 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
6965 TREE_TYPE (decl
) = newtype
;
6968 check_main_parameter_types (decl
);
6971 if (ctype
!= NULL_TREE
6972 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
6975 tree old_decl
= check_classfn (ctype
, decl
,
6976 (processing_template_decl
6977 > template_class_depth (ctype
))
6978 ? current_template_parms
6981 if (old_decl
== error_mark_node
)
6989 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
6990 /* Because grokfndecl is always supposed to return a
6991 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6992 here. We depend on our callers to figure out that its
6993 really a template that's being returned. */
6994 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
6996 if (DECL_STATIC_FUNCTION_P (old_decl
)
6997 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
6998 /* Remove the `this' parm added by grokclassfn.
6999 XXX Isn't this done in start_function, too? */
7000 revert_static_member_fn (decl
);
7001 if (DECL_ARTIFICIAL (old_decl
))
7003 error ("definition of implicitly-declared %qD", old_decl
);
7007 /* Since we've smashed OLD_DECL to its
7008 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7009 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7010 decl
= DECL_TEMPLATE_RESULT (decl
);
7012 /* Attempt to merge the declarations. This can fail, in
7013 the case of some invalid specialization declarations. */
7014 pushed_scope
= push_scope (ctype
);
7015 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7017 pop_scope (pushed_scope
);
7020 error ("no %q#D member function declared in class %qT",
7028 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7031 if (ctype
== NULL_TREE
|| check
)
7035 DECL_VIRTUAL_P (decl
) = 1;
7040 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7041 the linkage that DECL will receive in the object file. */
7044 set_linkage_for_static_data_member (tree decl
)
7046 /* A static data member always has static storage duration and
7047 external linkage. Note that static data members are forbidden in
7048 local classes -- the only situation in which a class has
7049 non-external linkage. */
7050 TREE_PUBLIC (decl
) = 1;
7051 TREE_STATIC (decl
) = 1;
7052 /* For non-template classes, static data members are always put
7053 out in exactly those files where they are defined, just as
7054 with ordinary namespace-scope variables. */
7055 if (!processing_template_decl
)
7056 DECL_INTERFACE_KNOWN (decl
) = 1;
7059 /* Create a VAR_DECL named NAME with the indicated TYPE.
7061 If SCOPE is non-NULL, it is the class type or namespace containing
7062 the variable. If SCOPE is NULL, the variable should is created in
7063 the innermost enclosings scope. */
7066 grokvardecl (tree type
,
7068 const cp_decl_specifier_seq
*declspecs
,
7074 tree explicit_scope
;
7076 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
7078 /* Compute the scope in which to place the variable, but remember
7079 whether or not that scope was explicitly specified by the user. */
7080 explicit_scope
= scope
;
7083 /* An explicit "extern" specifier indicates a namespace-scope
7085 if (declspecs
->storage_class
== sc_extern
)
7086 scope
= current_decl_namespace ();
7087 else if (!at_function_scope_p ())
7088 scope
= current_scope ();
7092 && (/* If the variable is a namespace-scope variable declared in a
7093 template, we need DECL_LANG_SPECIFIC. */
7094 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7095 /* Similarly for namespace-scope variables with language linkage
7097 || (TREE_CODE (scope
) == NAMESPACE_DECL
7098 && current_lang_name
!= lang_name_cplusplus
)
7099 /* Similarly for static data members. */
7101 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7103 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7105 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7106 set_decl_namespace (decl
, explicit_scope
, 0);
7108 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7110 if (declspecs
->storage_class
== sc_extern
)
7112 DECL_THIS_EXTERN (decl
) = 1;
7113 DECL_EXTERNAL (decl
) = !initialized
;
7116 if (DECL_CLASS_SCOPE_P (decl
))
7118 set_linkage_for_static_data_member (decl
);
7119 /* This function is only called with out-of-class definitions. */
7120 DECL_EXTERNAL (decl
) = 0;
7121 check_class_member_definition_namespace (decl
);
7123 /* At top level, either `static' or no s.c. makes a definition
7124 (perhaps tentative), and absence of `static' makes it public. */
7125 else if (toplevel_bindings_p ())
7127 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7128 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7129 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7131 /* Not at top level, only `static' makes a static definition. */
7134 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7135 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7138 if (declspecs
->specs
[(int)ds_thread
])
7139 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7141 /* If the type of the decl has no linkage, make sure that we'll
7142 notice that in mark_used. */
7143 if (cxx_dialect
> cxx98
7144 && decl_linkage (decl
) != lk_none
7145 && DECL_LANG_SPECIFIC (decl
) == NULL
7146 && !DECL_EXTERN_C_P (decl
)
7147 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7148 retrofit_lang_decl (decl
);
7150 if (TREE_PUBLIC (decl
))
7152 /* [basic.link]: A name with no linkage (notably, the name of a class
7153 or enumeration declared in a local scope) shall not be used to
7154 declare an entity with linkage.
7156 DR 757 relaxes this restriction for C++0x. */
7157 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7158 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7161 if (TYPE_ANONYMOUS_P (t
))
7163 if (DECL_EXTERN_C_P (decl
))
7164 /* Allow this; it's pretty common in C. */
7168 /* DRs 132, 319 and 389 seem to indicate types with
7169 no linkage can only be used to declare extern "C"
7170 entities. Since it's not always an error in the
7171 ISO C++ 90 Standard, we only issue a warning. */
7172 warning (0, "anonymous type with no linkage used to declare "
7173 "variable %q#D with linkage", decl
);
7174 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7175 warning (0, "%q+#D does not refer to the unqualified "
7176 "type, so it is not used for linkage",
7181 warning (0, "type %qT with no linkage used to declare variable "
7182 "%q#D with linkage", t
, decl
);
7186 DECL_INTERFACE_KNOWN (decl
) = 1;
7191 /* Create and return a canonical pointer to member function type, for
7192 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7195 build_ptrmemfunc_type (tree type
)
7199 tree unqualified_variant
= NULL_TREE
;
7201 if (type
== error_mark_node
)
7204 /* If a canonical type already exists for this type, use it. We use
7205 this method instead of type_hash_canon, because it only does a
7206 simple equality check on the list of field members. */
7208 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7211 /* Make sure that we always have the unqualified pointer-to-member
7213 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7215 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7217 t
= make_class_type (RECORD_TYPE
);
7218 xref_basetypes (t
, NULL_TREE
);
7220 /* Let the front end know this is a pointer to member function... */
7221 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7222 /* ... and not really a class type. */
7223 SET_CLASS_TYPE_P (t
, 0);
7225 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7228 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7230 TREE_CHAIN (field
) = fields
;
7233 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7235 /* Zap out the name so that the back end will give us the debugging
7236 information for this anonymous RECORD_TYPE. */
7237 TYPE_NAME (t
) = NULL_TREE
;
7239 /* If this is not the unqualified form of this pointer-to-member
7240 type, set the TYPE_MAIN_VARIANT for this type to be the
7241 unqualified type. Since they are actually RECORD_TYPEs that are
7242 not variants of each other, we must do this manually.
7243 As we just built a new type there is no need to do yet another copy. */
7244 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7246 int type_quals
= cp_type_quals (type
);
7247 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7248 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7249 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7250 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7251 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7252 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7253 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7256 /* Cache this pointer-to-member type so that we can find it again
7258 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7260 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7261 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7262 else if (TYPE_CANONICAL (type
) != type
)
7263 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
7268 /* Create and return a pointer to data member type. */
7271 build_ptrmem_type (tree class_type
, tree member_type
)
7273 if (TREE_CODE (member_type
) == METHOD_TYPE
)
7275 cp_cv_quals quals
= type_memfn_quals (member_type
);
7276 member_type
= build_memfn_type (member_type
, class_type
, quals
);
7277 return build_ptrmemfunc_type (build_pointer_type (member_type
));
7281 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
7282 return build_offset_type (class_type
, member_type
);
7286 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7287 Check to see that the definition is valid. Issue appropriate error
7288 messages. Return 1 if the definition is particularly bad, or 0
7292 check_static_variable_definition (tree decl
, tree type
)
7294 /* Motion 10 at San Diego: If a static const integral data member is
7295 initialized with an integral constant expression, the initializer
7296 may appear either in the declaration (within the class), or in
7297 the definition, but not both. If it appears in the class, the
7298 member is a member constant. The file-scope definition is always
7300 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
7302 error ("invalid in-class initialization of static data member "
7303 "of non-integral type %qT",
7305 /* If we just return the declaration, crashes will sometimes
7306 occur. We therefore return void_type_node, as if this were a
7307 friend declaration, to cause callers to completely ignore
7308 this declaration. */
7311 else if (!CP_TYPE_CONST_P (type
))
7312 error ("ISO C++ forbids in-class initialization of non-const "
7313 "static member %qD",
7315 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7316 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids initialization of member constant "
7317 "%qD of non-integral type %qT", decl
, type
);
7322 /* Given the SIZE (i.e., number of elements) in an array, compute an
7323 appropriate index type for the array. If non-NULL, NAME is the
7324 name of the thing being declared. */
7327 compute_array_index_type (tree name
, tree size
)
7331 tree abi_1_itype
= NULL_TREE
;
7333 if (error_operand_p (size
))
7334 return error_mark_node
;
7336 type
= TREE_TYPE (size
);
7337 /* The array bound must be an integer type. */
7338 if (!dependent_type_p (type
) && !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
7341 error ("size of array %qD has non-integral type %qT", name
, type
);
7343 error ("size of array has non-integral type %qT", type
);
7344 size
= integer_one_node
;
7345 type
= TREE_TYPE (size
);
7348 /* We can only call value_dependent_expression_p on integral constant
7349 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7350 set if this isn't one. */
7351 if (processing_template_decl
7352 && (TREE_SIDE_EFFECTS (size
) || value_dependent_expression_p (size
)))
7354 /* We cannot do any checking for a SIZE that isn't known to be
7355 constant. Just build the index type and mark that it requires
7356 structural equality checks. */
7357 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7358 size
, integer_one_node
));
7359 TYPE_DEPENDENT_P (itype
) = 1;
7360 TYPE_DEPENDENT_P_VALID (itype
) = 1;
7361 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
7365 if (!abi_version_at_least (2) && processing_template_decl
)
7366 /* For abi-1, we handled all instances in templates the same way,
7367 even when they were non-dependent. This affects the manglings
7368 produced. So, we do the normal checking for non-dependent
7369 sizes, but at the end we'll return the same type that abi-1
7370 would have, but with TYPE_CANONICAL set to the "right"
7371 value that the current ABI would provide. */
7372 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7373 size
, integer_one_node
));
7375 /* The size might be the result of a cast. */
7376 STRIP_TYPE_NOPS (size
);
7378 size
= mark_rvalue_use (size
);
7380 /* It might be a const variable or enumeration constant. */
7381 size
= integral_constant_value (size
);
7382 if (error_operand_p (size
))
7383 return error_mark_node
;
7385 /* Normally, the array-bound will be a constant. */
7386 if (TREE_CODE (size
) == INTEGER_CST
)
7388 /* Check to see if the array bound overflowed. Make that an
7389 error, no matter how generous we're being. */
7390 constant_expression_error (size
);
7392 /* An array must have a positive number of elements. */
7393 if (INT_CST_LT (size
, integer_zero_node
))
7396 error ("size of array %qD is negative", name
);
7398 error ("size of array is negative");
7399 size
= integer_one_node
;
7401 /* As an extension we allow zero-sized arrays. We always allow
7402 them in system headers because glibc uses them. */
7403 else if (integer_zerop (size
) && !in_system_header
)
7406 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array %qD", name
);
7408 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array");
7411 else if (TREE_CONSTANT (size
))
7413 /* `(int) &fn' is not a valid array bound. */
7415 error ("size of array %qD is not an integral constant-expression",
7418 error ("size of array is not an integral constant-expression");
7419 size
= integer_one_node
;
7421 else if (pedantic
&& warn_vla
!= 0)
7424 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
7426 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
7428 else if (warn_vla
> 0)
7432 "variable length array %qD is used", name
);
7435 "variable length array is used");
7438 if (processing_template_decl
&& !TREE_CONSTANT (size
))
7439 /* A variable sized array. */
7440 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
7443 HOST_WIDE_INT saved_processing_template_decl
;
7445 /* Compute the index of the largest element in the array. It is
7446 one less than the number of elements in the array. We save
7447 and restore PROCESSING_TEMPLATE_DECL so that computations in
7448 cp_build_binary_op will be appropriately folded. */
7449 saved_processing_template_decl
= processing_template_decl
;
7450 processing_template_decl
= 0;
7451 itype
= cp_build_binary_op (input_location
,
7453 cp_convert (ssizetype
, size
),
7454 cp_convert (ssizetype
, integer_one_node
),
7455 tf_warning_or_error
);
7456 itype
= fold (itype
);
7457 processing_template_decl
= saved_processing_template_decl
;
7459 if (!TREE_CONSTANT (itype
))
7460 /* A variable sized array. */
7461 itype
= variable_size (itype
);
7462 /* Make sure that there was no overflow when creating to a signed
7463 index type. (For example, on a 32-bit machine, an array with
7464 size 2^32 - 1 is too big.) */
7465 else if (TREE_CODE (itype
) == INTEGER_CST
7466 && TREE_OVERFLOW (itype
))
7468 error ("overflow in array dimension");
7469 TREE_OVERFLOW (itype
) = 0;
7473 /* Create and return the appropriate index type. */
7476 tree t
= build_index_type (itype
);
7477 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
7481 return build_index_type (itype
);
7484 /* Returns the scope (if any) in which the entity declared by
7485 DECLARATOR will be located. If the entity was declared with an
7486 unqualified name, NULL_TREE is returned. */
7489 get_scope_of_declarator (const cp_declarator
*declarator
)
7491 while (declarator
&& declarator
->kind
!= cdk_id
)
7492 declarator
= declarator
->declarator
;
7494 /* If the declarator-id is a SCOPE_REF, the scope in which the
7495 declaration occurs is the first operand. */
7497 && declarator
->u
.id
.qualifying_scope
)
7498 return declarator
->u
.id
.qualifying_scope
;
7500 /* Otherwise, the declarator is not a qualified name; the entity will
7501 be declared in the current scope. */
7505 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7506 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7510 create_array_type_for_decl (tree name
, tree type
, tree size
)
7512 tree itype
= NULL_TREE
;
7514 /* If things have already gone awry, bail now. */
7515 if (type
== error_mark_node
|| size
== error_mark_node
)
7516 return error_mark_node
;
7518 /* If there are some types which cannot be array elements,
7519 issue an error-message and return. */
7520 switch (TREE_CODE (type
))
7524 error ("declaration of %qD as array of void", name
);
7526 error ("creating array of void");
7527 return error_mark_node
;
7531 error ("declaration of %qD as array of functions", name
);
7533 error ("creating array of functions");
7534 return error_mark_node
;
7536 case REFERENCE_TYPE
:
7538 error ("declaration of %qD as array of references", name
);
7540 error ("creating array of references");
7541 return error_mark_node
;
7545 error ("declaration of %qD as array of function members", name
);
7547 error ("creating array of function members");
7548 return error_mark_node
;
7556 The constant expressions that specify the bounds of the arrays
7557 can be omitted only for the first member of the sequence. */
7558 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
7561 error ("declaration of %qD as multidimensional array must "
7562 "have bounds for all dimensions except the first",
7565 error ("multidimensional array must have bounds for all "
7566 "dimensions except the first");
7568 return error_mark_node
;
7571 /* Figure out the index type for the array. */
7573 itype
= compute_array_index_type (name
, size
);
7576 T is called the array element type; this type shall not be [...] an
7577 abstract class type. */
7578 abstract_virtuals_error (name
, type
);
7580 return build_cplus_array_type (type
, itype
);
7583 /* Check that it's OK to declare a function with the indicated TYPE.
7584 SFK indicates the kind of special function (if any) that this
7585 function is. OPTYPE is the type given in a conversion operator
7586 declaration, or the class type for a constructor/destructor.
7587 Returns the actual return type of the function; that
7588 may be different than TYPE if an error occurs, or for certain
7589 special functions. */
7592 check_special_function_return_type (special_function_kind sfk
,
7598 case sfk_constructor
:
7600 error ("return type specification for constructor invalid");
7602 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
7603 type
= build_pointer_type (optype
);
7605 type
= void_type_node
;
7608 case sfk_destructor
:
7610 error ("return type specification for destructor invalid");
7611 /* We can't use the proper return type here because we run into
7612 problems with ambiguous bases and covariant returns.
7613 Java classes are left unchanged because (void *) isn't a valid
7614 Java type, and we don't want to change the Java ABI. */
7615 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
7616 type
= build_pointer_type (void_type_node
);
7618 type
= void_type_node
;
7621 case sfk_conversion
:
7623 error ("return type specified for %<operator %T%>", optype
);
7634 /* A variable or data member (whose unqualified name is IDENTIFIER)
7635 has been declared with the indicated TYPE. If the TYPE is not
7636 acceptable, issue an error message and return a type to use for
7637 error-recovery purposes. */
7640 check_var_type (tree identifier
, tree type
)
7642 if (VOID_TYPE_P (type
))
7645 error ("unnamed variable or field declared void");
7646 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
7648 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
7649 error ("variable or field %qE declared void", identifier
);
7652 error ("variable or field declared void");
7653 type
= error_mark_node
;
7659 /* Given declspecs and a declarator (abstract or otherwise), determine
7660 the name and type of the object declared and construct a DECL node
7663 DECLSPECS points to the representation of declaration-specifier
7664 sequence that precedes declarator.
7666 DECL_CONTEXT says which syntactic context this declaration is in:
7667 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7668 FUNCDEF for a function definition. Like NORMAL but a few different
7669 error messages in each case. Return value may be zero meaning
7670 this definition is too screwy to try to parse.
7671 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7672 handle member functions (which have FIELD context).
7673 Return value may be zero meaning this definition is too screwy to
7675 PARM for a parameter declaration (either within a function prototype
7676 or before a function body). Make a PARM_DECL, or return void_type_node.
7677 TPARM for a template parameter declaration.
7678 CATCHPARM for a parameter declaration before a catch clause.
7679 TYPENAME if for a typename (in a cast or sizeof).
7680 Don't make a DECL node; just return the ..._TYPE node.
7681 FIELD for a struct or union field; make a FIELD_DECL.
7682 BITFIELD for a field with specified width.
7684 INITIALIZED is as for start_decl.
7686 ATTRLIST is a pointer to the list of attributes, which may be NULL
7687 if there are none; *ATTRLIST may be modified if attributes from inside
7688 the declarator should be applied to the declaration.
7690 When this function is called, scoping variables (such as
7691 CURRENT_CLASS_TYPE) should reflect the scope in which the
7692 declaration occurs, not the scope in which the new declaration will
7693 be placed. For example, on:
7697 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7700 Returns a DECL (if a declarator is present), a TYPE (if there is no
7701 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7705 grokdeclarator (const cp_declarator
*declarator
,
7706 const cp_decl_specifier_seq
*declspecs
,
7707 enum decl_context decl_context
,
7711 tree type
= NULL_TREE
;
7713 int explicit_int128
= 0;
7714 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
7715 int explicit_int
= 0;
7716 int explicit_char
= 0;
7717 int defaulted_int
= 0;
7718 tree dependent_name
= NULL_TREE
;
7720 tree typedef_decl
= NULL_TREE
;
7721 const char *name
= NULL
;
7722 tree typedef_type
= NULL_TREE
;
7723 /* True if this declarator is a function definition. */
7724 bool funcdef_flag
= false;
7725 cp_declarator_kind innermost_code
= cdk_error
;
7728 /* See the code below that used this. */
7729 tree decl_attr
= NULL_TREE
;
7732 /* Keep track of what sort of function is being processed
7733 so that we can warn about default return values, or explicit
7734 return values which do not match prescribed defaults. */
7735 special_function_kind sfk
= sfk_none
;
7737 tree dname
= NULL_TREE
;
7738 tree ctor_return_type
= NULL_TREE
;
7739 enum overload_flags flags
= NO_SPECIAL
;
7740 /* cv-qualifiers that apply to the declarator, for a declaration of
7741 a member function. */
7742 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
7743 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7745 tree raises
= NULL_TREE
;
7746 int template_count
= 0;
7747 tree returned_attrs
= NULL_TREE
;
7748 tree parms
= NULL_TREE
;
7749 const cp_declarator
*id_declarator
;
7750 /* The unqualified name of the declarator; either an
7751 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7752 tree unqualified_id
;
7753 /* The class type, if any, in which this entity is located,
7754 or NULL_TREE if none. Note that this value may be different from
7755 the current class type; for example if an attempt is made to declare
7756 "A::f" inside "B", this value will be "A". */
7757 tree ctype
= current_class_type
;
7758 /* The NAMESPACE_DECL for the namespace in which this entity is
7759 located. If an unqualified name is used to declare the entity,
7760 this value will be NULL_TREE, even if the entity is located at
7762 tree in_namespace
= NULL_TREE
;
7763 cp_storage_class storage_class
;
7764 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
7765 bool type_was_error_mark_node
= false;
7766 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
7767 bool template_type_arg
= false;
7768 bool template_parm_flag
= false;
7769 bool constexpr_p
= declspecs
->specs
[(int) ds_constexpr
];
7772 signed_p
= declspecs
->specs
[(int)ds_signed
];
7773 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
7774 short_p
= declspecs
->specs
[(int)ds_short
];
7775 long_p
= declspecs
->specs
[(int)ds_long
];
7776 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
7777 explicit_int128
= declspecs
->explicit_int128_p
;
7778 thread_p
= declspecs
->specs
[(int)ds_thread
];
7780 if (decl_context
== FUNCDEF
)
7781 funcdef_flag
= true, decl_context
= NORMAL
;
7782 else if (decl_context
== MEMFUNCDEF
)
7783 funcdef_flag
= true, decl_context
= FIELD
;
7784 else if (decl_context
== BITFIELD
)
7785 bitfield
= 1, decl_context
= FIELD
;
7786 else if (decl_context
== TEMPLATE_TYPE_ARG
)
7787 template_type_arg
= true, decl_context
= TYPENAME
;
7788 else if (decl_context
== TPARM
)
7789 template_parm_flag
= true, decl_context
= PARM
;
7791 if (initialized
> 1)
7792 funcdef_flag
= true;
7794 /* Look inside a declarator for the name being declared
7795 and get it as a string, for an error message. */
7796 for (id_declarator
= declarator
;
7798 id_declarator
= id_declarator
->declarator
)
7800 if (id_declarator
->kind
!= cdk_id
)
7801 innermost_code
= id_declarator
->kind
;
7803 switch (id_declarator
->kind
)
7806 if (id_declarator
->declarator
7807 && id_declarator
->declarator
->kind
== cdk_id
)
7809 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
7810 if (sfk
== sfk_destructor
)
7817 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
7818 tree decl
= id_declarator
->u
.id
.unqualified_name
;
7821 if (qualifying_scope
)
7823 if (at_function_scope_p ())
7827 A declarator-id shall not be qualified except
7830 None of the cases are permitted in block
7832 if (qualifying_scope
== global_namespace
)
7833 error ("invalid use of qualified-name %<::%D%>",
7835 else if (TYPE_P (qualifying_scope
))
7836 error ("invalid use of qualified-name %<%T::%D%>",
7837 qualifying_scope
, decl
);
7839 error ("invalid use of qualified-name %<%D::%D%>",
7840 qualifying_scope
, decl
);
7841 return error_mark_node
;
7843 else if (TYPE_P (qualifying_scope
))
7845 ctype
= qualifying_scope
;
7846 if (innermost_code
!= cdk_function
7847 && current_class_type
7848 && !UNIQUELY_DERIVED_FROM_P (ctype
,
7849 current_class_type
))
7851 error ("type %qT is not derived from type %qT",
7852 ctype
, current_class_type
);
7853 return error_mark_node
;
7856 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
7857 in_namespace
= qualifying_scope
;
7859 switch (TREE_CODE (decl
))
7865 if (innermost_code
!= cdk_function
)
7867 error ("declaration of %qD as non-function", decl
);
7868 return error_mark_node
;
7870 else if (!qualifying_scope
7871 && !(current_class_type
&& at_class_scope_p ()))
7873 error ("declaration of %qD as non-member", decl
);
7874 return error_mark_node
;
7877 type
= TREE_OPERAND (decl
, 0);
7879 type
= constructor_name (type
);
7880 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
7885 case TEMPLATE_ID_EXPR
:
7887 tree fns
= TREE_OPERAND (decl
, 0);
7890 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
7892 gcc_assert (is_overloaded_fn (dname
));
7893 dname
= DECL_NAME (get_first_fn (dname
));
7898 case IDENTIFIER_NODE
:
7899 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
7902 if (C_IS_RESERVED_WORD (dname
))
7904 error ("declarator-id missing; using reserved word %qD",
7906 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
7908 else if (!IDENTIFIER_TYPENAME_P (dname
))
7909 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
7912 gcc_assert (flags
== NO_SPECIAL
);
7913 flags
= TYPENAME_FLAG
;
7914 ctor_return_type
= TREE_TYPE (dname
);
7915 sfk
= sfk_conversion
;
7916 if (is_typename_at_global_scope (dname
))
7917 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
7919 name
= "<invalid operator>";
7936 return error_mark_node
;
7941 if (id_declarator
->kind
== cdk_id
)
7947 The declarator in a function-definition shall have the form
7948 D1 ( parameter-declaration-clause) ... */
7949 if (funcdef_flag
&& innermost_code
!= cdk_function
)
7951 error ("function definition does not declare parameters");
7952 return error_mark_node
;
7955 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
7956 && innermost_code
!= cdk_function
7957 && ! (ctype
&& !declspecs
->any_specifiers_p
))
7959 error ("declaration of %qD as non-function", dname
);
7960 return error_mark_node
;
7963 /* Anything declared one level down from the top level
7964 must be one of the parameters of a function
7965 (because the body is at least two levels down). */
7967 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7968 by not allowing C++ class definitions to specify their parameters
7969 with xdecls (must be spec.d in the parmlist).
7971 Since we now wait to push a class scope until we are sure that
7972 we are in a legitimate method context, we must set oldcname
7973 explicitly (since current_class_name is not yet alive).
7975 We also want to avoid calling this a PARM if it is in a namespace. */
7977 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
7979 struct cp_binding_level
*b
= current_binding_level
;
7980 current_binding_level
= b
->level_chain
;
7981 if (current_binding_level
!= 0 && toplevel_bindings_p ())
7982 decl_context
= PARM
;
7983 current_binding_level
= b
;
7987 name
= decl_context
== PARM
? "parameter" : "type name";
7989 /* If there were multiple types specified in the decl-specifier-seq,
7990 issue an error message. */
7991 if (declspecs
->multiple_types_p
)
7993 error ("two or more data types in declaration of %qs", name
);
7994 return error_mark_node
;
7997 if (declspecs
->conflicting_specifiers_p
)
7999 error ("conflicting specifiers in declaration of %qs", name
);
8000 return error_mark_node
;
8003 /* Extract the basic type from the decl-specifier-seq. */
8004 type
= declspecs
->type
;
8005 if (type
== error_mark_node
)
8008 type_was_error_mark_node
= true;
8010 /* If the entire declaration is itself tagged as deprecated then
8011 suppress reports of deprecated items. */
8012 if (type
&& TREE_DEPRECATED (type
)
8013 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8014 warn_deprecated_use (type
, NULL_TREE
);
8015 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8017 typedef_decl
= type
;
8018 type
= TREE_TYPE (typedef_decl
);
8019 if (TREE_DEPRECATED (type
)
8020 && DECL_ARTIFICIAL (typedef_decl
)
8021 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8022 warn_deprecated_use (type
, NULL_TREE
);
8024 /* No type at all: default to `int', and set DEFAULTED_INT
8025 because it was not a user-defined typedef. */
8026 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8028 /* These imply 'int'. */
8029 type
= integer_type_node
;
8033 explicit_int
= declspecs
->explicit_int_p
;
8034 explicit_char
= declspecs
->explicit_char_p
;
8037 /* See the code below that used this. */
8039 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
8041 typedef_type
= type
;
8044 if (sfk
!= sfk_conversion
)
8045 ctor_return_type
= ctype
;
8047 if (sfk
!= sfk_none
)
8048 type
= check_special_function_return_type (sfk
, type
,
8050 else if (type
== NULL_TREE
)
8056 /* We handle `main' specially here, because 'main () { }' is so
8057 common. With no options, it is allowed. With -Wreturn-type,
8058 it is a warning. It is only an error with -pedantic-errors. */
8059 is_main
= (funcdef_flag
8060 && dname
&& MAIN_NAME_P (dname
)
8061 && ctype
== NULL_TREE
8062 && in_namespace
== NULL_TREE
8063 && current_namespace
== global_namespace
);
8065 if (type_was_error_mark_node
)
8066 /* We've already issued an error, don't complain more. */;
8067 else if (in_system_header
|| flag_ms_extensions
)
8068 /* Allow it, sigh. */;
8070 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
8072 pedwarn (input_location
, OPT_pedantic
,
8073 "ISO C++ forbids declaration of %qs with no type", name
);
8075 warning (OPT_Wreturn_type
,
8076 "ISO C++ forbids declaration of %qs with no type", name
);
8078 type
= integer_type_node
;
8083 /* Now process the modifiers that were specified
8084 and check for invalid combinations. */
8086 /* Long double is a special combination. */
8087 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
8090 type
= cp_build_qualified_type (long_double_type_node
,
8091 cp_type_quals (type
));
8094 /* Check all other uses of type modifiers. */
8096 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
8100 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8101 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8102 else if (signed_p
&& unsigned_p
)
8103 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
8104 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
8105 error ("%<long long%> invalid for %qs", name
);
8106 else if (explicit_int128
&& TREE_CODE (type
) != INTEGER_TYPE
)
8107 error ("%<__int128%> invalid for %qs", name
);
8108 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
8109 error ("%<long%> invalid for %qs", name
);
8110 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
8111 error ("%<short%> invalid for %qs", name
);
8112 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8113 error ("%<long%> or %<short%> invalid for %qs", name
);
8114 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
8115 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
8116 else if ((long_p
|| short_p
) && explicit_char
)
8117 error ("%<long%> or %<short%> specified with char for %qs", name
);
8118 else if (long_p
&& short_p
)
8119 error ("%<long%> and %<short%> specified together for %qs", name
);
8120 else if (type
== char16_type_node
|| type
== char32_type_node
)
8122 if (signed_p
|| unsigned_p
)
8123 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8124 else if (short_p
|| long_p
)
8125 error ("%<short%> or %<long%> invalid for %qs", name
);
8130 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
8132 pedwarn (input_location
, OPT_pedantic
,
8133 "long, short, signed or unsigned used invalidly for %qs",
8135 if (flag_pedantic_errors
)
8138 if (explicit_int128
)
8140 if (int128_integer_type_node
== NULL_TREE
)
8142 error ("%<__int128%> is not supported by this target");
8147 pedwarn (input_location
, OPT_pedantic
,
8148 "ISO C++ does not support %<__int128%> for %qs",
8150 if (flag_pedantic_errors
)
8156 /* Discard the type modifiers if they are invalid. */
8164 explicit_int128
= false;
8168 /* Decide whether an integer type is signed or not.
8169 Optionally treat bitfields as signed by default. */
8173 It is implementation-defined whether a plain (neither
8174 explicitly signed or unsigned) char, short, int, or long
8175 bit-field is signed or unsigned.
8177 Naturally, we extend this to long long as well. Note that
8178 this does not include wchar_t. */
8179 || (bitfield
&& !flag_signed_bitfields
8181 /* A typedef for plain `int' without `signed' can be
8182 controlled just like plain `int', but a typedef for
8183 `signed int' cannot be so controlled. */
8185 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
8186 && TREE_CODE (type
) == INTEGER_TYPE
8187 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
8189 if (explicit_int128
)
8190 type
= int128_unsigned_type_node
;
8192 type
= long_long_unsigned_type_node
;
8194 type
= long_unsigned_type_node
;
8196 type
= short_unsigned_type_node
;
8197 else if (type
== char_type_node
)
8198 type
= unsigned_char_type_node
;
8199 else if (typedef_decl
)
8200 type
= unsigned_type_for (type
);
8202 type
= unsigned_type_node
;
8204 else if (signed_p
&& type
== char_type_node
)
8205 type
= signed_char_type_node
;
8206 else if (explicit_int128
)
8207 type
= int128_integer_type_node
;
8209 type
= long_long_integer_type_node
;
8211 type
= long_integer_type_node
;
8213 type
= short_integer_type_node
;
8215 if (declspecs
->specs
[(int)ds_complex
])
8217 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
8218 error ("complex invalid for %qs", name
);
8219 /* If we just have "complex", it is equivalent to
8220 "complex double", but if any modifiers at all are specified it is
8221 the complex form of TYPE. E.g, "complex short" is
8222 "complex short int". */
8223 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
8224 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
8225 type
= complex_double_type_node
;
8226 else if (type
== integer_type_node
)
8227 type
= complex_integer_type_node
;
8228 else if (type
== float_type_node
)
8229 type
= complex_float_type_node
;
8230 else if (type
== double_type_node
)
8231 type
= complex_double_type_node
;
8232 else if (type
== long_double_type_node
)
8233 type
= complex_long_double_type_node
;
8235 type
= build_complex_type (type
);
8238 type_quals
= TYPE_UNQUALIFIED
;
8239 if (declspecs
->specs
[(int)ds_const
])
8240 type_quals
|= TYPE_QUAL_CONST
;
8241 /* A `constexpr' specifier used in an object declaration declares
8242 the object as `const'. */
8245 if (innermost_code
== cdk_function
)
8247 else if (declspecs
->specs
[(int)ds_const
] != 0)
8248 error ("both %<const%> and %<constexpr%> cannot be used here");
8250 type_quals
|= TYPE_QUAL_CONST
;
8252 if (declspecs
->specs
[(int)ds_volatile
])
8253 type_quals
|= TYPE_QUAL_VOLATILE
;
8254 if (declspecs
->specs
[(int)ds_restrict
])
8255 type_quals
|= TYPE_QUAL_RESTRICT
;
8256 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
8257 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8260 type_quals
|= cp_type_quals (type
);
8261 type
= cp_build_qualified_type_real
8262 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
8263 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
8264 /* We might have ignored or rejected some of the qualifiers. */
8265 type_quals
= cp_type_quals (type
);
8268 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
8269 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
8270 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
8272 storage_class
= declspecs
->storage_class
;
8273 if (storage_class
== sc_static
)
8274 staticp
= 1 + (decl_context
== FIELD
);
8276 if (virtualp
&& staticp
== 2)
8278 error ("member %qD cannot be declared both virtual and static", dname
);
8279 storage_class
= sc_none
;
8282 friendp
= !! declspecs
->specs
[(int)ds_friend
];
8284 if (dependent_name
&& !friendp
)
8286 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
8287 return error_mark_node
;
8290 /* Issue errors about use of storage classes for parameters. */
8291 if (decl_context
== PARM
)
8293 if (declspecs
->specs
[(int)ds_typedef
])
8295 error ("typedef declaration invalid in parameter declaration");
8296 return error_mark_node
;
8298 else if (template_parm_flag
&& storage_class
!= sc_none
)
8300 error ("storage class specified for template parameter %qs", name
);
8301 return error_mark_node
;
8303 else if (storage_class
== sc_static
8304 || storage_class
== sc_extern
8306 error ("storage class specifiers invalid in parameter declarations");
8308 if (type_uses_auto (type
))
8310 error ("parameter declared %<auto%>");
8311 type
= error_mark_node
;
8314 /* Function parameters cannot be constexpr. If we saw one, moan
8315 and pretend it wasn't there. */
8318 error ("a parameter cannot be declared %<constexpr%>");
8323 /* Give error if `virtual' is used outside of class declaration. */
8325 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
8327 error ("%<virtual%> outside class declaration");
8331 /* Static anonymous unions are dealt with here. */
8332 if (staticp
&& decl_context
== TYPENAME
8334 && ANON_AGGR_TYPE_P (declspecs
->type
))
8335 decl_context
= FIELD
;
8337 /* Warn about storage classes that are invalid for certain
8338 kinds of declarations (parameters, typenames, etc.). */
8341 && storage_class
!= sc_extern
8342 && storage_class
!= sc_static
)
8343 || declspecs
->specs
[(int)ds_typedef
]))
8345 error ("multiple storage classes in declaration of %qs", name
);
8348 if (decl_context
!= NORMAL
8349 && ((storage_class
!= sc_none
8350 && storage_class
!= sc_mutable
)
8353 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
8354 && (storage_class
== sc_register
8355 || storage_class
== sc_auto
))
8357 else if (declspecs
->specs
[(int)ds_typedef
])
8359 else if (decl_context
== FIELD
8360 /* C++ allows static class elements. */
8361 && storage_class
== sc_static
)
8362 /* C++ also allows inlines and signed and unsigned elements,
8363 but in those cases we don't come in here. */
8367 if (decl_context
== FIELD
)
8368 error ("storage class specified for %qs", name
);
8371 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8372 error ("storage class specified for parameter %qs", name
);
8374 error ("storage class specified for typename");
8376 if (storage_class
== sc_register
8377 || storage_class
== sc_auto
8378 || storage_class
== sc_extern
8380 storage_class
= sc_none
;
8383 else if (storage_class
== sc_extern
&& funcdef_flag
8384 && ! toplevel_bindings_p ())
8385 error ("nested function %qs declared %<extern%>", name
);
8386 else if (toplevel_bindings_p ())
8388 if (storage_class
== sc_auto
)
8389 error ("top-level declaration of %qs specifies %<auto%>", name
);
8392 && storage_class
!= sc_extern
8393 && storage_class
!= sc_static
)
8395 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8400 if (storage_class
&& friendp
)
8402 error ("storage class specifiers invalid in friend function declarations");
8403 storage_class
= sc_none
;
8408 unqualified_id
= NULL_TREE
;
8411 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
8412 switch (TREE_CODE (unqualified_id
))
8415 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
8416 if (TYPE_P (unqualified_id
))
8417 unqualified_id
= constructor_name (unqualified_id
);
8420 case IDENTIFIER_NODE
:
8421 case TEMPLATE_ID_EXPR
:
8429 /* Determine the type of the entity declared by recurring on the
8431 for (; declarator
; declarator
= declarator
->declarator
)
8433 const cp_declarator
*inner_declarator
;
8436 if (type
== error_mark_node
)
8437 return error_mark_node
;
8439 attrs
= declarator
->attributes
;
8445 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
8446 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
8447 if (declarator
->kind
== cdk_function
)
8448 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
8449 if (declarator
->kind
== cdk_array
)
8450 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
8451 returned_attrs
= decl_attributes (&type
,
8452 chainon (returned_attrs
, attrs
),
8456 if (declarator
->kind
== cdk_id
)
8459 inner_declarator
= declarator
->declarator
;
8461 switch (declarator
->kind
)
8464 type
= create_array_type_for_decl (dname
, type
,
8465 declarator
->u
.array
.bounds
);
8473 /* Declaring a function type.
8474 Make sure we have a valid type for the function to return. */
8476 if (type_quals
!= TYPE_UNQUALIFIED
)
8478 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
8479 warning (OPT_Wignored_qualifiers
,
8480 "type qualifiers ignored on function return type");
8481 /* We now know that the TYPE_QUALS don't apply to the
8482 decl, but to its return type. */
8483 type_quals
= TYPE_UNQUALIFIED
;
8485 errmsg
= targetm
.invalid_return_type (type
);
8489 type
= integer_type_node
;
8492 /* Error about some types functions can't return. */
8494 if (TREE_CODE (type
) == FUNCTION_TYPE
)
8496 error ("%qs declared as function returning a function", name
);
8497 return error_mark_node
;
8499 if (TREE_CODE (type
) == ARRAY_TYPE
)
8501 error ("%qs declared as function returning an array", name
);
8502 return error_mark_node
;
8505 /* Pick up type qualifiers which should be applied to `this'. */
8506 memfn_quals
= declarator
->u
.function
.qualifiers
;
8508 /* Pick up the exception specifications. */
8509 raises
= declarator
->u
.function
.exception_specification
;
8511 /* Say it's a definition only for the CALL_EXPR
8512 closest to the identifier. */
8513 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
8515 /* Handle a late-specified return type. */
8518 if (type_uses_auto (type
))
8520 if (!declarator
->u
.function
.late_return_type
)
8522 error ("%qs function uses %<auto%> type specifier without"
8523 " late return type", name
);
8524 return error_mark_node
;
8526 else if (!is_auto (type
))
8528 error ("%qs function with late return type has"
8529 " %qT as its type rather than plain %<auto%>",
8531 return error_mark_node
;
8534 else if (declarator
->u
.function
.late_return_type
)
8536 error ("%qs function with late return type not declared"
8537 " with %<auto%> type specifier", name
);
8538 return error_mark_node
;
8541 type
= splice_late_return_type
8542 (type
, declarator
->u
.function
.late_return_type
);
8543 if (type
== error_mark_node
)
8544 return error_mark_node
;
8546 if (ctype
== NULL_TREE
8547 && decl_context
== FIELD
8549 && (friendp
== 0 || dname
== current_class_name
))
8550 ctype
= current_class_type
;
8552 if (ctype
&& (sfk
== sfk_constructor
8553 || sfk
== sfk_destructor
))
8555 /* We are within a class's scope. If our declarator name
8556 is the same as the class name, and we are defining
8557 a function, then it is a constructor/destructor, and
8558 therefore returns a void type. */
8560 /* ISO C++ 12.4/2. A destructor may not be declared
8561 const or volatile. A destructor may not be
8564 ISO C++ 12.1. A constructor may not be declared
8565 const or volatile. A constructor may not be
8566 virtual. A constructor may not be static. */
8568 error ((flags
== DTOR_FLAG
)
8569 ? "destructor cannot be static member function"
8570 : "constructor cannot be static member function");
8573 error ((flags
== DTOR_FLAG
)
8574 ? "destructors may not be cv-qualified"
8575 : "constructors may not be cv-qualified");
8576 memfn_quals
= TYPE_UNQUALIFIED
;
8579 if (decl_context
== FIELD
8580 && !member_function_or_else (ctype
,
8583 return error_mark_node
;
8585 if (flags
!= DTOR_FLAG
)
8587 /* It's a constructor. */
8592 permerror (input_location
, "constructors cannot be declared virtual");
8595 if (decl_context
== FIELD
8596 && sfk
!= sfk_constructor
)
8597 return error_mark_node
;
8599 if (decl_context
== FIELD
)
8605 error ("can't initialize friend function %qs", name
);
8608 /* Cannot be both friend and virtual. */
8609 error ("virtual functions cannot be friends");
8612 if (decl_context
== NORMAL
)
8613 error ("friend declaration not in class definition");
8614 if (current_function_decl
&& funcdef_flag
)
8615 error ("can't define friend function %qs in a local "
8619 else if (ctype
&& sfk
== sfk_conversion
)
8623 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
8628 /* It is not allowed to use `constexpr' in a function
8629 declaration that is not a definition.
8630 That is too strict, though. */
8631 if (constexpr_p
&& !funcdef_flag
)
8633 error ("the %<constexpr%> specifier cannot be used in "
8634 "a function declaration that is not a definition");
8635 constexpr_p
= false;
8638 /* A constexpr non-static member function is implicitly const. */
8639 if (constexpr_p
&& decl_context
== FIELD
&& staticp
== 0
8640 && sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
8641 memfn_quals
|= TYPE_QUAL_CONST
;
8643 arg_types
= grokparms (declarator
->u
.function
.parameters
,
8646 if (inner_declarator
8647 && inner_declarator
->kind
== cdk_id
8648 && inner_declarator
->u
.id
.sfk
== sfk_destructor
8649 && arg_types
!= void_list_node
)
8651 error ("destructors may not have parameters");
8652 arg_types
= void_list_node
;
8656 type
= build_function_type (type
, arg_types
);
8663 /* Filter out pointers-to-references and references-to-references.
8664 We can get these if a TYPE_DECL is used. */
8666 if (TREE_CODE (type
) == REFERENCE_TYPE
)
8668 if (declarator
->kind
!= cdk_reference
)
8670 error ("cannot declare pointer to %q#T", type
);
8671 type
= TREE_TYPE (type
);
8674 /* In C++0x, we allow reference to reference declarations
8675 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8676 and template type arguments [14.3.1/4 temp.arg.type]. The
8677 check for direct reference to reference declarations, which
8678 are still forbidden, occurs below. Reasoning behind the change
8679 can be found in DR106, DR540, and the rvalue reference
8681 else if (cxx_dialect
== cxx98
)
8683 error ("cannot declare reference to %q#T", type
);
8684 type
= TREE_TYPE (type
);
8687 else if (VOID_TYPE_P (type
))
8689 if (declarator
->kind
== cdk_reference
)
8690 error ("cannot declare reference to %q#T", type
);
8691 else if (declarator
->kind
== cdk_ptrmem
)
8692 error ("cannot declare pointer to %q#T member", type
);
8695 /* We now know that the TYPE_QUALS don't apply to the decl,
8696 but to the target of the pointer. */
8697 type_quals
= TYPE_UNQUALIFIED
;
8699 if (declarator
->kind
== cdk_ptrmem
8700 && (TREE_CODE (type
) == FUNCTION_TYPE
8701 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
8703 memfn_quals
|= type_memfn_quals (type
);
8704 type
= build_memfn_type (type
,
8705 declarator
->u
.pointer
.class_type
,
8707 memfn_quals
= TYPE_UNQUALIFIED
;
8710 if (TREE_CODE (type
) == FUNCTION_TYPE
8711 && type_memfn_quals (type
) != TYPE_UNQUALIFIED
)
8712 error (declarator
->kind
== cdk_reference
8713 ? G_("cannot declare reference to qualified function type %qT")
8714 : G_("cannot declare pointer to qualified function type %qT"),
8717 /* When the pointed-to type involves components of variable size,
8718 care must be taken to ensure that the size evaluation code is
8719 emitted early enough to dominate all the possible later uses
8720 and late enough for the variables on which it depends to have
8723 This is expected to happen automatically when the pointed-to
8724 type has a name/declaration of it's own, but special attention
8725 is required if the type is anonymous.
8727 We handle the NORMAL and FIELD contexts here by inserting a
8728 dummy statement that just evaluates the size at a safe point
8729 and ensures it is not deferred until e.g. within a deeper
8730 conditional context (c++/43555).
8732 We expect nothing to be needed here for PARM or TYPENAME.
8733 Evaluating the size at this point for TYPENAME would
8734 actually be incorrect, as we might be in the middle of an
8735 expression with side effects on the pointed-to type size
8736 "arguments" prior to the pointer declaration point and the
8737 size evaluation could end up prior to the side effects. */
8739 if (!TYPE_NAME (type
)
8740 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
8741 && at_function_scope_p ()
8742 && variably_modified_type_p (type
, NULL_TREE
))
8743 finish_expr_stmt (TYPE_SIZE (type
));
8745 if (declarator
->kind
== cdk_reference
)
8747 /* In C++0x, the type we are creating a reference to might be
8748 a typedef which is itself a reference type. In that case,
8749 we follow the reference collapsing rules in
8750 [7.1.3/8 dcl.typedef] to create the final reference type:
8752 "If a typedef TD names a type that is a reference to a type
8753 T, an attempt to create the type 'lvalue reference to cv TD'
8754 creates the type 'lvalue reference to T,' while an attempt
8755 to create the type "rvalue reference to cv TD' creates the
8758 if (!VOID_TYPE_P (type
))
8759 type
= cp_build_reference_type
8760 ((TREE_CODE (type
) == REFERENCE_TYPE
8761 ? TREE_TYPE (type
) : type
),
8762 (declarator
->u
.reference
.rvalue_ref
8763 && (TREE_CODE(type
) != REFERENCE_TYPE
8764 || TYPE_REF_IS_RVALUE (type
))));
8766 /* In C++0x, we need this check for direct reference to
8767 reference declarations, which are forbidden by
8768 [8.3.2/5 dcl.ref]. Reference to reference declarations
8769 are only allowed indirectly through typedefs and template
8770 type arguments. Example:
8772 void foo(int & &); // invalid ref-to-ref decl
8774 typedef int & int_ref;
8775 void foo(int_ref &); // valid ref-to-ref decl
8777 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
8778 error ("cannot declare reference to %q#T, which is not "
8779 "a typedef or a template type argument", type
);
8781 else if (TREE_CODE (type
) == METHOD_TYPE
)
8782 type
= build_ptrmemfunc_type (build_pointer_type (type
));
8783 else if (declarator
->kind
== cdk_ptrmem
)
8785 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
8787 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
8788 /* We will already have complained. */
8789 type
= error_mark_node
;
8791 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
8795 type
= build_pointer_type (type
);
8797 /* Process a list of type modifier keywords (such as
8798 const or volatile) that were given inside the `*' or `&'. */
8800 if (declarator
->u
.pointer
.qualifiers
)
8803 = cp_build_qualified_type (type
,
8804 declarator
->u
.pointer
.qualifiers
);
8805 type_quals
= cp_type_quals (type
);
8818 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
8819 && TREE_CODE (type
) != FUNCTION_TYPE
8820 && TREE_CODE (type
) != METHOD_TYPE
)
8822 error ("template-id %qD used as a declarator",
8824 unqualified_id
= dname
;
8827 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8828 qualified with a class-name, turn it into a METHOD_TYPE, unless
8829 we know that the function is static. We take advantage of this
8830 opportunity to do other processing that pertains to entities
8831 explicitly declared to be class members. Note that if DECLARATOR
8832 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8833 would not have exited the loop above. */
8835 && declarator
->u
.id
.qualifying_scope
8836 && TYPE_P (declarator
->u
.id
.qualifying_scope
))
8840 ctype
= declarator
->u
.id
.qualifying_scope
;
8841 ctype
= TYPE_MAIN_VARIANT (ctype
);
8843 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
8845 /* You're supposed to have one `template <...>' for every
8846 template class, but you don't need one for a full
8847 specialization. For example:
8849 template <class T> struct S{};
8850 template <> struct S<int> { void f(); };
8851 void S<int>::f () {}
8853 is correct; there shouldn't be a `template <>' for the
8854 definition of `S<int>::f'. */
8855 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
8856 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
8857 /* T is an explicit (not partial) specialization. All
8858 containing classes must therefore also be explicitly
8861 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
8862 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
8863 template_count
+= 1;
8865 t
= TYPE_MAIN_DECL (t
);
8866 t
= DECL_CONTEXT (t
);
8869 if (ctype
== current_class_type
)
8873 permerror (input_location
, "member functions are implicitly friends of their class");
8877 permerror (declarator
->id_loc
,
8878 "extra qualification %<%T::%> on member %qs",
8881 else if (/* If the qualifying type is already complete, then we
8882 can skip the following checks. */
8883 !COMPLETE_TYPE_P (ctype
)
8884 && (/* If the function is being defined, then
8885 qualifying type must certainly be complete. */
8887 /* A friend declaration of "T::f" is OK, even if
8888 "T" is a template parameter. But, if this
8889 function is not a friend, the qualifying type
8891 || (!friendp
&& !CLASS_TYPE_P (ctype
))
8892 /* For a declaration, the type need not be
8893 complete, if either it is dependent (since there
8894 is no meaningful definition of complete in that
8895 case) or the qualifying class is currently being
8897 || !(dependent_type_p (ctype
)
8898 || currently_open_class (ctype
)))
8899 /* Check that the qualifying type is complete. */
8900 && !complete_type_or_else (ctype
, NULL_TREE
))
8901 return error_mark_node
;
8902 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
8904 tree sname
= declarator
->u
.id
.unqualified_name
;
8906 if (current_class_type
8907 && (!friendp
|| funcdef_flag
))
8910 ? "cannot define member function %<%T::%s%> within %<%T%>"
8911 : "cannot declare member function %<%T::%s%> within %<%T%>",
8912 ctype
, name
, current_class_type
);
8913 return error_mark_node
;
8916 /* It is not permitted to define a member function outside ist
8917 membership class as `constexpr'. */
8919 error ("a constexpr function cannot be defined "
8920 "outside of its class");
8922 if (TREE_CODE (sname
) == IDENTIFIER_NODE
8923 && NEW_DELETE_OPNAME_P (sname
))
8924 /* Overloaded operator new and operator delete
8925 are always static functions. */
8928 type
= build_memfn_type (type
, ctype
, memfn_quals
);
8930 else if (declspecs
->specs
[(int)ds_typedef
]
8931 && current_class_type
)
8933 error ("cannot declare member %<%T::%s%> within %qT",
8934 ctype
, name
, current_class_type
);
8935 return error_mark_node
;
8939 /* Now TYPE has the actual type. */
8944 *attrlist
= chainon (returned_attrs
, *attrlist
);
8946 attrlist
= &returned_attrs
;
8949 /* Handle parameter packs. */
8950 if (parameter_pack_p
)
8952 if (decl_context
== PARM
)
8953 /* Turn the type into a pack expansion.*/
8954 type
= make_pack_expansion (type
);
8956 error ("non-parameter %qs cannot be a parameter pack", name
);
8959 /* Did array size calculations overflow? */
8961 if (TREE_CODE (type
) == ARRAY_TYPE
8962 && COMPLETE_TYPE_P (type
)
8963 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
8964 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
8966 error ("size of array %qs is too large", name
);
8967 /* If we proceed with the array type as it is, we'll eventually
8968 crash in tree_low_cst(). */
8969 type
= error_mark_node
;
8972 if ((decl_context
== FIELD
|| decl_context
== PARM
)
8973 && !processing_template_decl
8974 && variably_modified_type_p (type
, NULL_TREE
))
8976 if (decl_context
== FIELD
)
8977 error ("data member may not have variably modified type %qT", type
);
8979 error ("parameter may not have variably modified type %qT", type
);
8980 type
= error_mark_node
;
8983 if (explicitp
== 1 || (explicitp
&& friendp
))
8985 /* [dcl.fct.spec] The explicit specifier shall only be used in
8986 declarations of constructors within a class definition. */
8987 error ("only declarations of constructors can be %<explicit%>");
8991 if (storage_class
== sc_mutable
)
8993 if (decl_context
!= FIELD
|| friendp
)
8995 error ("non-member %qs cannot be declared %<mutable%>", name
);
8996 storage_class
= sc_none
;
8998 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
9000 error ("non-object member %qs cannot be declared %<mutable%>", name
);
9001 storage_class
= sc_none
;
9003 else if (TREE_CODE (type
) == FUNCTION_TYPE
9004 || TREE_CODE (type
) == METHOD_TYPE
)
9006 error ("function %qs cannot be declared %<mutable%>", name
);
9007 storage_class
= sc_none
;
9011 error ("static %qs cannot be declared %<mutable%>", name
);
9012 storage_class
= sc_none
;
9014 else if (type_quals
& TYPE_QUAL_CONST
)
9016 error ("const %qs cannot be declared %<mutable%>", name
);
9017 storage_class
= sc_none
;
9021 /* If this is declaring a typedef name, return a TYPE_DECL. */
9022 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
9026 /* Note that the grammar rejects storage classes
9027 in typenames, fields or parameters. */
9028 if (current_lang_name
== lang_name_java
)
9029 TYPE_FOR_JAVA (type
) = 1;
9031 /* This declaration:
9033 typedef void f(int) const;
9035 declares a function type which is not a member of any
9036 particular class, but which is cv-qualified; for
9037 example "f S::*" declares a pointer to a const-qualified
9038 member function of S. We record the cv-qualification in the
9040 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9042 type
= apply_memfn_quals (type
, memfn_quals
);
9044 /* We have now dealt with these qualifiers. */
9045 memfn_quals
= TYPE_UNQUALIFIED
;
9048 if (decl_context
== FIELD
)
9049 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
9051 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
9052 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
9053 error_at (DECL_SOURCE_LOCATION (decl
),
9054 "typedef name may not be a nested-name-specifier");
9055 TREE_TYPE (decl
) = error_mark_node
;
9058 if (decl_context
!= FIELD
)
9060 if (!current_function_decl
)
9061 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
9062 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
9063 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9064 (current_function_decl
)))
9065 /* The TYPE_DECL is "abstract" because there will be
9066 clones of this constructor/destructor, and there will
9067 be copies of this TYPE_DECL generated in those
9069 DECL_ABSTRACT (decl
) = 1;
9071 else if (constructor_name_p (unqualified_id
, current_class_type
))
9072 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
9073 "as enclosing class",
9076 /* If the user declares "typedef struct {...} foo" then the
9077 struct will have an anonymous name. Fill that name in now.
9078 Nothing can refer to it, so nothing needs know about the name
9080 if (type
!= error_mark_node
9083 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
9084 && TYPE_ANONYMOUS_P (type
)
9085 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
9089 /* Replace the anonymous name with the real name everywhere. */
9090 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
9092 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
9093 /* We do not rename the debug info representing the
9094 anonymous tagged type because the standard says in
9095 [dcl.typedef] that the naming applies only for
9096 linkage purposes. */
9097 /*debug_hooks->set_name (t, decl);*/
9098 TYPE_NAME (t
) = decl
;
9101 if (TYPE_LANG_SPECIFIC (type
))
9102 TYPE_WAS_ANONYMOUS (type
) = 1;
9104 /* If this is a typedef within a template class, the nested
9105 type is a (non-primary) template. The name for the
9106 template needs updating as well. */
9107 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
9108 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
9109 = TYPE_IDENTIFIER (type
);
9111 /* Adjust linkage now that we aren't anonymous anymore. */
9112 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
9113 determine_visibility (TYPE_MAIN_DECL (type
));
9115 /* FIXME remangle member functions; member functions of a
9116 type with external linkage have external linkage. */
9120 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
9121 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
9123 bad_specifiers (decl
, "type", virtualp
,
9124 memfn_quals
!= TYPE_UNQUALIFIED
,
9125 inlinep
, friendp
, raises
!= NULL_TREE
);
9130 /* Detect the case of an array type of unspecified size
9131 which came, as such, direct from a typedef name.
9132 We must copy the type, so that the array's domain can be
9133 individually set by the object's initializer. */
9135 if (type
&& typedef_type
9136 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
9137 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
9138 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
9140 /* Detect where we're using a typedef of function type to declare a
9141 function. PARMS will not be set, so we must create it now. */
9143 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9145 tree decls
= NULL_TREE
;
9148 for (args
= TYPE_ARG_TYPES (type
);
9149 args
&& args
!= void_list_node
;
9150 args
= TREE_CHAIN (args
))
9152 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
9154 TREE_CHAIN (decl
) = decls
;
9158 parms
= nreverse (decls
);
9160 if (decl_context
!= TYPENAME
)
9162 /* A cv-qualifier-seq shall only be part of the function type
9163 for a non-static member function. [8.3.5/4 dcl.fct] */
9164 if (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9165 && (current_class_type
== NULL_TREE
|| staticp
) )
9168 ? G_("qualified function types cannot be used to "
9169 "declare static member functions")
9170 : G_("qualified function types cannot be used to "
9171 "declare free functions"));
9172 type
= TYPE_MAIN_VARIANT (type
);
9175 /* The qualifiers on the function type become the qualifiers on
9176 the non-static member function. */
9177 memfn_quals
|= type_memfn_quals (type
);
9178 type_quals
= TYPE_UNQUALIFIED
;
9182 /* If this is a type name (such as, in a cast or sizeof),
9183 compute the type and return it now. */
9185 if (decl_context
== TYPENAME
)
9187 /* Note that the grammar rejects storage classes
9188 in typenames, fields or parameters. */
9189 if (type_quals
!= TYPE_UNQUALIFIED
)
9190 type_quals
= TYPE_UNQUALIFIED
;
9192 /* Special case: "friend class foo" looks like a TYPENAME context. */
9195 if (type_quals
!= TYPE_UNQUALIFIED
)
9197 error ("type qualifiers specified for friend class declaration");
9198 type_quals
= TYPE_UNQUALIFIED
;
9202 error ("%<inline%> specified for friend class declaration");
9208 /* Don't allow friend declaration without a class-key. */
9209 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9210 permerror (input_location
, "template parameters cannot be friends");
9211 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
9212 permerror (input_location
, "friend declaration requires class-key, "
9213 "i.e. %<friend class %T::%D%>",
9214 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
9216 permerror (input_location
, "friend declaration requires class-key, "
9217 "i.e. %<friend %#T%>",
9221 /* Only try to do this stuff if we didn't already give up. */
9222 if (type
!= integer_type_node
)
9224 /* A friendly class? */
9225 if (current_class_type
)
9226 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
9229 error ("trying to make class %qT a friend of global scope",
9232 type
= void_type_node
;
9235 else if (memfn_quals
)
9237 if (ctype
== NULL_TREE
9238 && TREE_CODE (type
) == METHOD_TYPE
)
9239 ctype
= TYPE_METHOD_BASETYPE (type
);
9242 type
= build_memfn_type (type
, ctype
, memfn_quals
);
9243 /* Core issue #547: need to allow this in template type args. */
9244 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9245 type
= apply_memfn_quals (type
, memfn_quals
);
9247 error ("invalid qualifiers on non-member function type");
9252 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
9253 && decl_context
!= CATCHPARM
9254 && TREE_CODE (type
) != UNION_TYPE
9257 error ("abstract declarator %qT used as declaration", type
);
9258 return error_mark_node
;
9261 /* Only functions may be declared using an operator-function-id. */
9263 && IDENTIFIER_OPNAME_P (unqualified_id
)
9264 && TREE_CODE (type
) != FUNCTION_TYPE
9265 && TREE_CODE (type
) != METHOD_TYPE
)
9267 error ("declaration of %qD as non-function", unqualified_id
);
9268 return error_mark_node
;
9271 /* We don't check parameter types here because we can emit a better
9272 error message later. */
9273 if (decl_context
!= PARM
)
9275 type
= check_var_type (unqualified_id
, type
);
9276 if (type
== error_mark_node
)
9277 return error_mark_node
;
9280 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9281 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9283 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9285 if (ctype
|| in_namespace
)
9286 error ("cannot use %<::%> in parameter declaration");
9288 /* A parameter declared as an array of T is really a pointer to T.
9289 One declared as a function is really a pointer to a function.
9290 One declared as a member is really a pointer to member. */
9292 if (TREE_CODE (type
) == ARRAY_TYPE
)
9294 /* Transfer const-ness of array into that of type pointed to. */
9295 type
= build_pointer_type (TREE_TYPE (type
));
9296 type_quals
= TYPE_UNQUALIFIED
;
9298 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9299 type
= build_pointer_type (type
);
9305 if (decl_context
== PARM
)
9307 decl
= cp_build_parm_decl (unqualified_id
, type
);
9309 bad_specifiers (decl
, "parameter", virtualp
,
9310 memfn_quals
!= TYPE_UNQUALIFIED
,
9311 inlinep
, friendp
, raises
!= NULL_TREE
);
9313 else if (decl_context
== FIELD
)
9315 /* The C99 flexible array extension. */
9316 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
9317 && TYPE_DOMAIN (type
) == NULL_TREE
)
9319 tree itype
= compute_array_index_type (dname
, integer_zero_node
);
9320 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
9323 if (type
== error_mark_node
)
9325 /* Happens when declaring arrays of sizes which
9326 are error_mark_node, for example. */
9329 else if (in_namespace
&& !friendp
)
9331 /* Something like struct S { int N::j; }; */
9332 error ("invalid use of %<::%>");
9333 return error_mark_node
;
9335 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9338 tree function_context
;
9342 if (ctype
== NULL_TREE
)
9343 ctype
= current_class_type
;
9345 if (ctype
== NULL_TREE
)
9347 error ("can't make %qD into a method -- not in a class",
9349 return error_mark_node
;
9352 /* ``A union may [ ... ] not [ have ] virtual functions.''
9354 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
9356 error ("function %qD declared virtual inside a union",
9358 return error_mark_node
;
9361 if (NEW_DELETE_OPNAME_P (unqualified_id
))
9365 error ("%qD cannot be declared virtual, since it "
9371 else if (staticp
< 2)
9372 type
= build_memfn_type (type
, ctype
, memfn_quals
);
9375 /* Check that the name used for a destructor makes sense. */
9376 if (sfk
== sfk_destructor
)
9378 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
9382 gcc_assert (friendp
);
9383 error ("expected qualified name in friend declaration "
9384 "for destructor %qD", uqname
);
9385 return error_mark_node
;
9388 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
9390 error ("declaration of %qD as member of %qT",
9392 return error_mark_node
;
9395 error ("a destructor cannot be %<constexpr%>");
9397 else if (sfk
== sfk_constructor
&& friendp
)
9399 error ("expected qualified name in friend declaration "
9400 "for constructor %qD",
9401 id_declarator
->u
.id
.unqualified_name
);
9402 return error_mark_node
;
9405 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9406 function_context
= (ctype
!= NULL_TREE
) ?
9407 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
9408 publicp
= (! friendp
|| ! staticp
)
9409 && function_context
== NULL_TREE
;
9410 decl
= grokfndecl (ctype
, type
,
9411 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
9412 ? unqualified_id
: dname
,
9415 virtualp
, flags
, memfn_quals
, raises
,
9416 friendp
? -1 : 0, friendp
, publicp
,
9417 inlinep
|| constexpr_p
,
9419 funcdef_flag
, template_count
, in_namespace
,
9420 attrlist
, declarator
->id_loc
);
9421 if (decl
== NULL_TREE
)
9422 return error_mark_node
;
9424 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9425 /* The decl and setting of decl_attr is also turned off. */
9426 decl
= build_decl_attribute_variant (decl
, decl_attr
);
9429 /* [class.conv.ctor]
9431 A constructor declared without the function-specifier
9432 explicit that can be called with a single parameter
9433 specifies a conversion from the type of its first
9434 parameter to the type of its class. Such a constructor
9435 is called a converting constructor. */
9437 DECL_NONCONVERTING_P (decl
) = 1;
9439 else if (TREE_CODE (type
) == METHOD_TYPE
)
9441 /* We only get here for friend declarations of
9442 members of other classes. */
9443 /* All method decls are public, so tell grokfndecl to set
9444 TREE_PUBLIC, also. */
9445 decl
= grokfndecl (ctype
, type
,
9446 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
9447 ? unqualified_id
: dname
,
9450 virtualp
, flags
, memfn_quals
, raises
,
9451 friendp
? -1 : 0, friendp
, 1, 0, sfk
,
9452 funcdef_flag
, template_count
, in_namespace
,
9454 declarator
->id_loc
);
9455 if (decl
== NULL_TREE
)
9456 return error_mark_node
;
9458 else if (!staticp
&& !dependent_type_p (type
)
9459 && !COMPLETE_TYPE_P (complete_type (type
))
9460 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
9463 error ("field %qD has incomplete type", unqualified_id
);
9465 error ("name %qT has incomplete type", type
);
9467 /* If we're instantiating a template, tell them which
9468 instantiation made the field's type be incomplete. */
9469 if (current_class_type
9470 && TYPE_NAME (current_class_type
)
9471 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type
))
9473 && declspecs
->type
== type
)
9474 error (" in instantiation of template %qT",
9475 current_class_type
);
9477 return error_mark_node
;
9483 error ("%qE is neither function nor member function; "
9484 "cannot be declared friend", unqualified_id
);
9492 /* Friends are treated specially. */
9493 if (ctype
== current_class_type
)
9494 ; /* We already issued a permerror. */
9495 else if (decl
&& DECL_NAME (decl
))
9497 if (template_class_depth (current_class_type
) == 0)
9499 decl
= check_explicit_specialization
9500 (unqualified_id
, decl
, template_count
,
9501 2 * funcdef_flag
+ 4);
9502 if (decl
== error_mark_node
)
9503 return error_mark_node
;
9506 DECL_DECLARED_CONSTEXPR_P (decl
) = constexpr_p
;
9507 decl
= do_friend (ctype
, unqualified_id
, decl
,
9513 return error_mark_node
;
9516 /* Structure field. It may not be a function, except for C++. */
9518 if (decl
== NULL_TREE
)
9524 /* An attempt is being made to initialize a non-static
9525 member. But, from [class.mem]:
9527 4 A member-declarator can contain a
9528 constant-initializer only if it declares a static
9529 member (_class.static_) of integral or enumeration
9530 type, see _class.static.data_.
9532 This used to be relatively common practice, but
9533 the rest of the compiler does not correctly
9534 handle the initialization unless the member is
9535 static so we make it static below. */
9536 permerror (input_location
, "ISO C++ forbids initialization of member %qD",
9538 permerror (input_location
, "making %qD static", unqualified_id
);
9542 if (uses_template_parms (type
))
9543 /* We'll check at instantiation time. */
9545 else if (check_static_variable_definition (unqualified_id
,
9547 /* If we just return the declaration, crashes
9548 will sometimes occur. We therefore return
9549 void_type_node, as if this was a friend
9550 declaration, to cause callers to completely
9551 ignore this declaration. */
9552 return error_mark_node
;
9557 /* C++ allows static class members. All other work
9558 for this is done by grokfield. */
9559 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
9560 set_linkage_for_static_data_member (decl
);
9561 /* Even if there is an in-class initialization, DECL
9562 is considered undefined until an out-of-class
9563 definition is provided. */
9564 DECL_EXTERNAL (decl
) = 1;
9567 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
9572 error ("non-static data member %qE declared %<constexpr%>",
9574 decl
= build_decl (input_location
,
9575 FIELD_DECL
, unqualified_id
, type
);
9576 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
9577 if (bitfield
&& !unqualified_id
)
9578 TREE_NO_WARNING (decl
) = 1;
9580 if (storage_class
== sc_mutable
)
9582 DECL_MUTABLE_P (decl
) = 1;
9583 storage_class
= sc_none
;
9587 bad_specifiers (decl
, "field", virtualp
,
9588 memfn_quals
!= TYPE_UNQUALIFIED
,
9589 inlinep
, friendp
, raises
!= NULL_TREE
);
9592 else if (TREE_CODE (type
) == FUNCTION_TYPE
9593 || TREE_CODE (type
) == METHOD_TYPE
)
9598 if (!unqualified_id
)
9599 return error_mark_node
;
9601 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
9602 original_name
= dname
;
9604 original_name
= unqualified_id
;
9606 if (storage_class
== sc_auto
)
9607 error ("storage class %<auto%> invalid for function %qs", name
);
9608 else if (storage_class
== sc_register
)
9609 error ("storage class %<register%> invalid for function %qs", name
);
9611 error ("storage class %<__thread%> invalid for function %qs", name
);
9613 /* Function declaration not at top level.
9614 Storage classes other than `extern' are not allowed
9615 and `extern' makes no difference. */
9616 if (! toplevel_bindings_p ()
9617 && (storage_class
== sc_static
9618 || declspecs
->specs
[(int)ds_inline
])
9621 if (storage_class
== sc_static
)
9622 pedwarn (input_location
, OPT_pedantic
,
9623 "%<static%> specified invalid for function %qs "
9624 "declared out of global scope", name
);
9626 pedwarn (input_location
, OPT_pedantic
,
9627 "%<inline%> specifier invalid for function %qs "
9628 "declared out of global scope", name
);
9631 if (ctype
!= NULL_TREE
9632 && TREE_CODE (ctype
) != NAMESPACE_DECL
&& !MAYBE_CLASS_TYPE_P (ctype
))
9634 error ("%q#T is not a class or a namespace", ctype
);
9638 if (ctype
== NULL_TREE
)
9642 error ("virtual non-class function %qs", name
);
9645 else if (sfk
== sfk_constructor
9646 || sfk
== sfk_destructor
)
9649 ? "%qs defined in a non-class scope"
9650 : "%qs declared in a non-class scope", name
);
9654 else if (TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
9655 && !NEW_DELETE_OPNAME_P (original_name
))
9656 type
= build_method_type_directly (ctype
,
9658 TYPE_ARG_TYPES (type
));
9660 /* Record presence of `static'. */
9661 publicp
= (ctype
!= NULL_TREE
9662 || storage_class
== sc_extern
9663 || storage_class
!= sc_static
);
9665 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
9666 virtualp
, flags
, memfn_quals
, raises
,
9668 publicp
, inlinep
|| constexpr_p
, sfk
, funcdef_flag
,
9669 template_count
, in_namespace
, attrlist
,
9670 declarator
->id_loc
);
9671 if (decl
== NULL_TREE
)
9672 return error_mark_node
;
9676 int invalid_static
= 0;
9678 /* Don't allow a static member function in a class, and forbid
9679 declaring main to be static. */
9680 if (TREE_CODE (type
) == METHOD_TYPE
)
9682 permerror (input_location
, "cannot declare member function %qD to have "
9683 "static linkage", decl
);
9686 else if (current_function_decl
)
9688 /* FIXME need arm citation */
9689 error ("cannot declare static function inside another function");
9696 storage_class
= sc_none
;
9702 /* It's a variable. */
9704 /* An uninitialized decl with `extern' is a reference. */
9705 decl
= grokvardecl (type
, unqualified_id
,
9708 (type_quals
& TYPE_QUAL_CONST
) != 0,
9709 ctype
? ctype
: in_namespace
);
9710 bad_specifiers (decl
, "variable", virtualp
,
9711 memfn_quals
!= TYPE_UNQUALIFIED
,
9712 inlinep
, friendp
, raises
!= NULL_TREE
);
9716 DECL_CONTEXT (decl
) = ctype
;
9719 permerror (input_location
, "%<static%> may not be used when defining "
9720 "(as opposed to declaring) a static data member");
9722 storage_class
= sc_none
;
9724 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
9726 error ("static member %qD declared %<register%>", decl
);
9727 storage_class
= sc_none
;
9729 if (storage_class
== sc_extern
&& pedantic
)
9731 pedwarn (input_location
, OPT_pedantic
,
9732 "cannot explicitly declare member %q#D to have "
9733 "extern linkage", decl
);
9734 storage_class
= sc_none
;
9739 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
9741 if (toplevel_bindings_p ())
9743 /* It's common practice (and completely valid) to have a const
9744 be initialized and declared extern. */
9745 if (!(type_quals
& TYPE_QUAL_CONST
))
9746 warning (0, "%qs initialized and declared %<extern%>", name
);
9750 error ("%qs has both %<extern%> and initializer", name
);
9751 return error_mark_node
;
9755 /* Record `register' declaration for warnings on &
9756 and in case doing stupid register allocation. */
9758 if (storage_class
== sc_register
)
9759 DECL_REGISTER (decl
) = 1;
9760 else if (storage_class
== sc_extern
)
9761 DECL_THIS_EXTERN (decl
) = 1;
9762 else if (storage_class
== sc_static
)
9763 DECL_THIS_STATIC (decl
) = 1;
9765 /* Don't forget constexprness. */
9766 if (VAR_OR_FUNCTION_DECL_P (decl
))
9767 DECL_DECLARED_CONSTEXPR_P (decl
) = constexpr_p
;
9769 /* Record constancy and volatility on the DECL itself . There's
9770 no need to do this when processing a template; we'll do this
9771 for the instantiated declaration based on the type of DECL. */
9772 if (!processing_template_decl
)
9773 cp_apply_type_quals_to_decl (type_quals
, decl
);
9779 /* Subroutine of start_function. Ensure that each of the parameter
9780 types (as listed in PARMS) is complete, as is required for a
9781 function definition. */
9784 require_complete_types_for_parms (tree parms
)
9786 for (; parms
; parms
= TREE_CHAIN (parms
))
9788 if (dependent_type_p (TREE_TYPE (parms
)))
9790 if (!VOID_TYPE_P (TREE_TYPE (parms
))
9791 && complete_type_or_else (TREE_TYPE (parms
), parms
))
9793 relayout_decl (parms
);
9794 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
9797 /* grokparms or complete_type_or_else will have already issued
9799 TREE_TYPE (parms
) = error_mark_node
;
9803 /* Returns nonzero if T is a local variable. */
9806 local_variable_p (const_tree t
)
9808 if ((TREE_CODE (t
) == VAR_DECL
9809 /* A VAR_DECL with a context that is a _TYPE is a static data
9811 && !TYPE_P (CP_DECL_CONTEXT (t
))
9812 /* Any other non-local variable must be at namespace scope. */
9813 && !DECL_NAMESPACE_SCOPE_P (t
))
9814 || (TREE_CODE (t
) == PARM_DECL
))
9820 /* Like local_variable_p, but suitable for use as a tree-walking
9824 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
9825 void *data ATTRIBUTE_UNUSED
)
9827 if (local_variable_p (*tp
) && !DECL_ARTIFICIAL (*tp
))
9829 else if (TYPE_P (*tp
))
9836 /* Check that ARG, which is a default-argument expression for a
9837 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9838 something goes wrong. DECL may also be a _TYPE node, rather than a
9839 DECL, if there is no DECL available. */
9842 check_default_argument (tree decl
, tree arg
)
9847 if (TREE_CODE (arg
) == DEFAULT_ARG
)
9848 /* We get a DEFAULT_ARG when looking at an in-class declaration
9849 with a default argument. Ignore the argument for now; we'll
9850 deal with it after the class is complete. */
9859 decl_type
= TREE_TYPE (decl
);
9861 if (arg
== error_mark_node
9862 || decl
== error_mark_node
9863 || TREE_TYPE (arg
) == error_mark_node
9864 || decl_type
== error_mark_node
)
9865 /* Something already went wrong. There's no need to check
9867 return error_mark_node
;
9869 /* [dcl.fct.default]
9871 A default argument expression is implicitly converted to the
9873 if (!TREE_TYPE (arg
)
9874 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
9877 error ("default argument for %q#D has type %qT",
9878 decl
, TREE_TYPE (arg
));
9880 error ("default argument for parameter of type %qT has type %qT",
9881 decl_type
, TREE_TYPE (arg
));
9883 return error_mark_node
;
9886 /* [dcl.fct.default]
9888 Local variables shall not be used in default argument
9891 The keyword `this' shall not be used in a default argument of a
9893 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
9896 error ("default argument %qE uses local variable %qD", arg
, var
);
9897 return error_mark_node
;
9904 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9907 type_is_deprecated (tree type
)
9909 enum tree_code code
;
9910 if (TREE_DEPRECATED (type
))
9912 if (TYPE_NAME (type
)
9913 && TREE_DEPRECATED (TYPE_NAME (type
)))
9916 /* Do warn about using typedefs to a deprecated class. */
9917 if (TAGGED_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
9918 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
9920 code
= TREE_CODE (type
);
9922 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
9923 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
9924 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
9925 return type_is_deprecated (TREE_TYPE (type
));
9927 if (TYPE_PTRMEMFUNC_P (type
))
9928 return type_is_deprecated
9929 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
9934 /* Decode the list of parameter types for a function type.
9935 Given the list of things declared inside the parens,
9936 return a list of types.
9938 If this parameter does not end with an ellipsis, we append
9941 *PARMS is set to the chain of PARM_DECLs created. */
9944 grokparms (tree parmlist
, tree
*parms
)
9946 tree result
= NULL_TREE
;
9947 tree decls
= NULL_TREE
;
9951 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
9953 tree type
= NULL_TREE
;
9954 tree init
= TREE_PURPOSE (parm
);
9955 tree decl
= TREE_VALUE (parm
);
9958 if (parm
== void_list_node
)
9961 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
9964 type
= TREE_TYPE (decl
);
9965 if (VOID_TYPE_P (type
))
9967 if (same_type_p (type
, void_type_node
)
9968 && DECL_SELF_REFERENCE_P (type
)
9969 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
9970 /* this is a parmlist of `(void)', which is ok. */
9972 cxx_incomplete_type_error (decl
, type
);
9973 /* It's not a good idea to actually create parameters of
9974 type `void'; other parts of the compiler assume that a
9975 void type terminates the parameter list. */
9976 type
= error_mark_node
;
9977 TREE_TYPE (decl
) = error_mark_node
;
9980 if (type
!= error_mark_node
9981 && TYPE_FOR_JAVA (type
)
9982 && MAYBE_CLASS_TYPE_P (type
))
9984 error ("parameter %qD has Java class type", decl
);
9985 type
= error_mark_node
;
9986 TREE_TYPE (decl
) = error_mark_node
;
9990 if (type
!= error_mark_node
9991 && (errmsg
= targetm
.invalid_parameter_type (type
)))
9994 type
= error_mark_node
;
9995 TREE_TYPE (decl
) = error_mark_node
;
9998 if (type
!= error_mark_node
)
10000 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
10002 tree deptype
= type_is_deprecated (type
);
10004 warn_deprecated_use (deptype
, NULL_TREE
);
10007 /* Top-level qualifiers on the parameters are
10008 ignored for function types. */
10009 type
= cp_build_qualified_type (type
, 0);
10010 if (TREE_CODE (type
) == METHOD_TYPE
)
10012 error ("parameter %qD invalidly declared method type", decl
);
10013 type
= build_pointer_type (type
);
10014 TREE_TYPE (decl
) = type
;
10016 else if (abstract_virtuals_error (decl
, type
))
10017 any_error
= 1; /* Seems like a good idea. */
10018 else if (POINTER_TYPE_P (type
))
10020 /* [dcl.fct]/6, parameter types cannot contain pointers
10021 (references) to arrays of unknown bound. */
10022 tree t
= TREE_TYPE (type
);
10023 int ptr
= TYPE_PTR_P (type
);
10027 if (TYPE_PTR_P (t
))
10029 else if (TREE_CODE (t
) != ARRAY_TYPE
)
10031 else if (!TYPE_DOMAIN (t
))
10035 if (TREE_CODE (t
) == ARRAY_TYPE
)
10037 ? G_("parameter %qD includes pointer to array of "
10038 "unknown bound %qT")
10039 : G_("parameter %qD includes reference to array of "
10040 "unknown bound %qT"),
10046 else if (init
&& !processing_template_decl
)
10047 init
= check_default_argument (decl
, init
);
10050 if (TREE_CODE (decl
) == PARM_DECL
10051 && FUNCTION_PARAMETER_PACK_P (decl
)
10052 && TREE_CHAIN (parm
)
10053 && TREE_CHAIN (parm
) != void_list_node
)
10054 error ("parameter packs must be at the end of the parameter list");
10056 TREE_CHAIN (decl
) = decls
;
10058 result
= tree_cons (init
, type
, result
);
10060 decls
= nreverse (decls
);
10061 result
= nreverse (result
);
10063 result
= chainon (result
, void_list_node
);
10070 /* D is a constructor or overloaded `operator='.
10072 Let T be the class in which D is declared. Then, this function
10075 -1 if D's is an ill-formed constructor or copy assignment operator
10076 whose first parameter is of type `T'.
10077 0 if D is not a copy constructor or copy assignment
10079 1 if D is a copy constructor or copy assignment operator whose
10080 first parameter is a reference to non-const qualified T.
10081 2 if D is a copy constructor or copy assignment operator whose
10082 first parameter is a reference to const qualified T.
10084 This function can be used as a predicate. Positive values indicate
10085 a copy constructor and nonzero values indicate a copy assignment
10089 copy_fn_p (const_tree d
)
10095 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10097 if (TREE_CODE (d
) == TEMPLATE_DECL
10098 || (DECL_TEMPLATE_INFO (d
)
10099 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10100 /* Instantiations of template member functions are never copy
10101 functions. Note that member functions of templated classes are
10102 represented as template functions internally, and we must
10103 accept those as copy functions. */
10106 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10110 arg_type
= TREE_VALUE (args
);
10111 if (arg_type
== error_mark_node
)
10114 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
10116 /* Pass by value copy assignment operator. */
10119 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10120 && !TYPE_REF_IS_RVALUE (arg_type
)
10121 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
10123 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
10129 args
= TREE_CHAIN (args
);
10131 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10132 /* There are more non-optional args. */
10138 /* D is a constructor or overloaded `operator='.
10140 Let T be the class in which D is declared. Then, this function
10141 returns true when D is a move constructor or move assignment
10142 operator, false otherwise. */
10145 move_fn_p (const_tree d
)
10149 bool result
= false;
10151 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10153 if (cxx_dialect
== cxx98
)
10154 /* There are no move constructors if we are in C++98 mode. */
10157 if (TREE_CODE (d
) == TEMPLATE_DECL
10158 || (DECL_TEMPLATE_INFO (d
)
10159 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10160 /* Instantiations of template member functions are never copy
10161 functions. Note that member functions of templated classes are
10162 represented as template functions internally, and we must
10163 accept those as copy functions. */
10166 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10170 arg_type
= TREE_VALUE (args
);
10171 if (arg_type
== error_mark_node
)
10174 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10175 && TYPE_REF_IS_RVALUE (arg_type
)
10176 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
10180 args
= TREE_CHAIN (args
);
10182 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10183 /* There are more non-optional args. */
10189 /* Remember any special properties of member function DECL. */
10192 grok_special_member_properties (tree decl
)
10196 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
10199 class_type
= DECL_CONTEXT (decl
);
10200 if (DECL_CONSTRUCTOR_P (decl
))
10202 int ctor
= copy_fn_p (decl
);
10204 if (!DECL_ARTIFICIAL (decl
))
10205 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
10211 A non-template constructor for class X is a copy
10212 constructor if its first parameter is of type X&, const
10213 X&, volatile X& or const volatile X&, and either there
10214 are no other parameters or else all other parameters have
10215 default arguments. */
10216 TYPE_HAS_INIT_REF (class_type
) = 1;
10217 if (user_provided_p (decl
))
10218 TYPE_HAS_COMPLEX_INIT_REF (class_type
) = 1;
10220 TYPE_HAS_CONST_INIT_REF (class_type
) = 1;
10222 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
10224 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
10225 if (user_provided_p (decl
))
10226 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
10228 else if (is_list_ctor (decl
))
10229 TYPE_HAS_LIST_CTOR (class_type
) = 1;
10231 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
10235 A non-template assignment operator for class X is a copy
10236 assignment operator if its parameter is of type X, X&, const
10237 X&, volatile X& or const volatile X&. */
10239 int assop
= copy_fn_p (decl
);
10243 TYPE_HAS_ASSIGN_REF (class_type
) = 1;
10244 if (user_provided_p (decl
))
10245 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type
) = 1;
10247 TYPE_HAS_CONST_ASSIGN_REF (class_type
) = 1;
10252 /* Check a constructor DECL has the correct form. Complains
10253 if the class has a constructor of the form X(X). */
10256 grok_ctor_properties (const_tree ctype
, const_tree decl
)
10258 int ctor_parm
= copy_fn_p (decl
);
10264 A declaration of a constructor for a class X is ill-formed if
10265 its first parameter is of type (optionally cv-qualified) X
10266 and either there are no other parameters or else all other
10267 parameters have default arguments.
10269 We *don't* complain about member template instantiations that
10270 have this form, though; they can occur as we try to decide
10271 what constructor to use during overload resolution. Since
10272 overload resolution will never prefer such a constructor to
10273 the non-template copy constructor (which is either explicitly
10274 or implicitly defined), there's no need to worry about their
10275 existence. Theoretically, they should never even be
10276 instantiated, but that's hard to forestall. */
10277 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10285 /* An operator with this code is unary, but can also be binary. */
10288 ambi_op_p (enum tree_code code
)
10290 return (code
== INDIRECT_REF
10291 || code
== ADDR_EXPR
10292 || code
== UNARY_PLUS_EXPR
10293 || code
== NEGATE_EXPR
10294 || code
== PREINCREMENT_EXPR
10295 || code
== PREDECREMENT_EXPR
);
10298 /* An operator with this name can only be unary. */
10301 unary_op_p (enum tree_code code
)
10303 return (code
== TRUTH_NOT_EXPR
10304 || code
== BIT_NOT_EXPR
10305 || code
== COMPONENT_REF
10306 || code
== TYPE_EXPR
);
10309 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10310 errors are issued for invalid declarations. */
10313 grok_op_properties (tree decl
, bool complain
)
10315 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
10317 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
10318 tree name
= DECL_NAME (decl
);
10319 enum tree_code operator_code
;
10324 /* Count the number of arguments and check for ellipsis. */
10325 for (argtype
= argtypes
, arity
= 0;
10326 argtype
&& argtype
!= void_list_node
;
10327 argtype
= TREE_CHAIN (argtype
))
10329 ellipsis_p
= !argtype
;
10331 class_type
= DECL_CONTEXT (decl
);
10332 if (class_type
&& !CLASS_TYPE_P (class_type
))
10333 class_type
= NULL_TREE
;
10335 if (DECL_CONV_FN_P (decl
))
10336 operator_code
= TYPE_EXPR
;
10340 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10341 if (ansi_opname (CODE) == name) \
10343 operator_code = (CODE); \
10346 else if (ansi_assopname (CODE) == name) \
10348 operator_code = (CODE); \
10349 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10353 #include "operators.def"
10354 #undef DEF_OPERATOR
10356 gcc_unreachable ();
10359 gcc_assert (operator_code
!= MAX_TREE_CODES
);
10360 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
10363 switch (operator_code
)
10366 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
10370 TYPE_GETS_DELETE (class_type
) |= 1;
10374 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
10377 case VEC_DELETE_EXPR
:
10378 TYPE_GETS_DELETE (class_type
) |= 2;
10385 /* [basic.std.dynamic.allocation]/1:
10387 A program is ill-formed if an allocation function is declared
10388 in a namespace scope other than global scope or declared static
10391 The same also holds true for deallocation functions. */
10392 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
10393 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
10395 if (DECL_NAMESPACE_SCOPE_P (decl
))
10397 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
10399 error ("%qD may not be declared within a namespace", decl
);
10402 else if (!TREE_PUBLIC (decl
))
10404 error ("%qD may not be declared as static", decl
);
10410 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
10412 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
10413 DECL_IS_OPERATOR_NEW (decl
) = 1;
10415 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
10416 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
10419 /* An operator function must either be a non-static member function
10420 or have at least one parameter of a class, a reference to a class,
10421 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10422 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
10424 if (operator_code
== TYPE_EXPR
10425 || operator_code
== CALL_EXPR
10426 || operator_code
== COMPONENT_REF
10427 || operator_code
== ARRAY_REF
10428 || operator_code
== NOP_EXPR
)
10430 error ("%qD must be a nonstatic member function", decl
);
10437 if (DECL_STATIC_FUNCTION_P (decl
))
10439 error ("%qD must be either a non-static member "
10440 "function or a non-member function", decl
);
10444 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
10446 tree arg
= non_reference (TREE_VALUE (p
));
10447 if (arg
== error_mark_node
)
10450 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10451 because these checks are performed even on
10452 template functions. */
10453 if (MAYBE_CLASS_TYPE_P (arg
)
10454 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
10458 if (!p
|| p
== void_list_node
)
10461 error ("%qD must have an argument of class or "
10462 "enumerated type", decl
);
10468 /* There are no restrictions on the arguments to an overloaded
10470 if (operator_code
== CALL_EXPR
)
10473 /* Warn about conversion operators that will never be used. */
10474 if (IDENTIFIER_TYPENAME_P (name
)
10475 && ! DECL_TEMPLATE_INFO (decl
)
10477 /* Warn only declaring the function; there is no need to
10478 warn again about out-of-class definitions. */
10479 && class_type
== current_class_type
)
10481 tree t
= TREE_TYPE (name
);
10482 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
10485 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
10487 if (TREE_CODE (t
) == VOID_TYPE
)
10488 warning (OPT_Wconversion
,
10490 ? G_("conversion to a reference to void "
10491 "will never use a type conversion operator")
10492 : G_("conversion to void "
10493 "will never use a type conversion operator"));
10494 else if (class_type
)
10496 if (t
== class_type
)
10497 warning (OPT_Wconversion
,
10499 ? G_("conversion to a reference to the same type "
10500 "will never use a type conversion operator")
10501 : G_("conversion to the same type "
10502 "will never use a type conversion operator"));
10503 /* Don't force t to be complete here. */
10504 else if (MAYBE_CLASS_TYPE_P (t
)
10505 && COMPLETE_TYPE_P (t
)
10506 && DERIVED_FROM_P (t
, class_type
))
10507 warning (OPT_Wconversion
,
10509 ? G_("conversion to a reference to a base class "
10510 "will never use a type conversion operator")
10511 : G_("conversion to a base class "
10512 "will never use a type conversion operator"));
10517 if (operator_code
== COND_EXPR
)
10520 error ("ISO C++ prohibits overloading operator ?:");
10523 else if (ellipsis_p
)
10525 error ("%qD must not have variable number of arguments", decl
);
10528 else if (ambi_op_p (operator_code
))
10531 /* We pick the one-argument operator codes by default, so
10532 we don't have to change anything. */
10534 else if (arity
== 2)
10536 /* If we thought this was a unary operator, we now know
10537 it to be a binary operator. */
10538 switch (operator_code
)
10541 operator_code
= MULT_EXPR
;
10545 operator_code
= BIT_AND_EXPR
;
10548 case UNARY_PLUS_EXPR
:
10549 operator_code
= PLUS_EXPR
;
10553 operator_code
= MINUS_EXPR
;
10556 case PREINCREMENT_EXPR
:
10557 operator_code
= POSTINCREMENT_EXPR
;
10560 case PREDECREMENT_EXPR
:
10561 operator_code
= POSTDECREMENT_EXPR
;
10565 gcc_unreachable ();
10568 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
10570 if ((operator_code
== POSTINCREMENT_EXPR
10571 || operator_code
== POSTDECREMENT_EXPR
)
10572 && ! processing_template_decl
10573 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
10576 error ("postfix %qD must take %<int%> as its argument",
10579 error ("postfix %qD must take %<int%> as its second "
10587 error ("%qD must take either zero or one argument", decl
);
10589 error ("%qD must take either one or two arguments", decl
);
10593 /* More Effective C++ rule 6. */
10595 && (operator_code
== POSTINCREMENT_EXPR
10596 || operator_code
== POSTDECREMENT_EXPR
10597 || operator_code
== PREINCREMENT_EXPR
10598 || operator_code
== PREDECREMENT_EXPR
))
10600 tree arg
= TREE_VALUE (argtypes
);
10601 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
10602 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
10603 arg
= TREE_TYPE (arg
);
10604 arg
= TYPE_MAIN_VARIANT (arg
);
10605 if (operator_code
== PREINCREMENT_EXPR
10606 || operator_code
== PREDECREMENT_EXPR
)
10608 if (TREE_CODE (ret
) != REFERENCE_TYPE
10609 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
10611 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
10612 build_reference_type (arg
));
10616 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
10617 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
10621 else if (unary_op_p (operator_code
))
10626 error ("%qD must take %<void%>", decl
);
10628 error ("%qD must take exactly one argument", decl
);
10632 else /* if (binary_op_p (operator_code)) */
10637 error ("%qD must take exactly one argument", decl
);
10639 error ("%qD must take exactly two arguments", decl
);
10643 /* More Effective C++ rule 7. */
10645 && (operator_code
== TRUTH_ANDIF_EXPR
10646 || operator_code
== TRUTH_ORIF_EXPR
10647 || operator_code
== COMPOUND_EXPR
))
10648 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
10652 /* Effective C++ rule 23. */
10655 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
10656 && (operator_code
== PLUS_EXPR
10657 || operator_code
== MINUS_EXPR
10658 || operator_code
== TRUNC_DIV_EXPR
10659 || operator_code
== MULT_EXPR
10660 || operator_code
== TRUNC_MOD_EXPR
)
10661 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
10662 warning (OPT_Weffc__
, "%qD should return by value", decl
);
10664 /* [over.oper]/8 */
10665 for (; argtypes
&& argtypes
!= void_list_node
;
10666 argtypes
= TREE_CHAIN (argtypes
))
10667 if (TREE_PURPOSE (argtypes
))
10669 TREE_PURPOSE (argtypes
) = NULL_TREE
;
10670 if (operator_code
== POSTINCREMENT_EXPR
10671 || operator_code
== POSTDECREMENT_EXPR
)
10673 pedwarn (input_location
, OPT_pedantic
, "%qD cannot have default arguments",
10678 error ("%qD cannot have default arguments", decl
);
10686 /* Return a string giving the keyword associate with CODE. */
10688 static const char *
10689 tag_name (enum tag_types code
)
10701 case typename_type
:
10704 gcc_unreachable ();
10708 /* Name lookup in an elaborated-type-specifier (after the keyword
10709 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10710 elaborated-type-specifier is invalid, issue a diagnostic and return
10711 error_mark_node; otherwise, return the *_TYPE to which it referred.
10712 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10715 check_elaborated_type_specifier (enum tag_types tag_code
,
10717 bool allow_template_p
)
10723 struct S { struct S *p; };
10725 name lookup will find the TYPE_DECL for the implicit "S::S"
10726 typedef. Adjust for that here. */
10727 if (DECL_SELF_REFERENCE_P (decl
))
10728 decl
= TYPE_NAME (TREE_TYPE (decl
));
10730 type
= TREE_TYPE (decl
);
10732 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10733 is false for this case as well. */
10734 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
10736 error ("using template type parameter %qT after %qs",
10737 type
, tag_name (tag_code
));
10738 return error_mark_node
;
10742 If the identifier resolves to a typedef-name or a template
10743 type-parameter, the elaborated-type-specifier is ill-formed.
10745 In other words, the only legitimate declaration to use in the
10746 elaborated type specifier is the implicit typedef created when
10747 the type is declared. */
10748 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
10749 && !DECL_SELF_REFERENCE_P (decl
)
10750 && tag_code
!= typename_type
)
10752 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
10753 error ("%q+D has a previous declaration here", decl
);
10754 return error_mark_node
;
10756 else if (TREE_CODE (type
) != RECORD_TYPE
10757 && TREE_CODE (type
) != UNION_TYPE
10758 && tag_code
!= enum_type
10759 && tag_code
!= typename_type
)
10761 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
10762 error ("%q+T has a previous declaration here", type
);
10763 return error_mark_node
;
10765 else if (TREE_CODE (type
) != ENUMERAL_TYPE
10766 && tag_code
== enum_type
)
10768 error ("%qT referred to as enum", type
);
10769 error ("%q+T has a previous declaration here", type
);
10770 return error_mark_node
;
10772 else if (!allow_template_p
10773 && TREE_CODE (type
) == RECORD_TYPE
10774 && CLASSTYPE_IS_TEMPLATE (type
))
10776 /* If a class template appears as elaborated type specifier
10777 without a template header such as:
10779 template <class T> class C {};
10780 void f(class C); // No template header here
10782 then the required template argument is missing. */
10783 error ("template argument required for %<%s %T%>",
10784 tag_name (tag_code
),
10785 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
10786 return error_mark_node
;
10792 /* Lookup NAME in elaborate type specifier in scope according to
10793 SCOPE and issue diagnostics if necessary.
10794 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10795 found, and ERROR_MARK_NODE for type error. */
10798 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
10799 tag_scope scope
, bool template_header_p
)
10803 if (scope
== ts_global
)
10805 /* First try ordinary name lookup, ignoring hidden class name
10806 injected via friend declaration. */
10807 decl
= lookup_name_prefer_type (name
, 2);
10808 /* If that fails, the name will be placed in the smallest
10809 non-class, non-function-prototype scope according to 3.3.1/5.
10810 We may already have a hidden name declared as friend in this
10811 scope. So lookup again but not ignoring hidden names.
10812 If we find one, that name will be made visible rather than
10813 creating a new tag. */
10815 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
10818 decl
= lookup_type_scope (name
, scope
);
10820 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
10821 decl
= DECL_TEMPLATE_RESULT (decl
);
10823 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
10825 /* Look for invalid nested type:
10829 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
10831 error ("%qD has the same name as the class in which it is "
10834 return error_mark_node
;
10837 /* Two cases we need to consider when deciding if a class
10838 template is allowed as an elaborated type specifier:
10839 1. It is a self reference to its own class.
10840 2. It comes with a template header.
10844 template <class T> class C {
10845 class C *c1; // DECL_SELF_REFERENCE_P is true
10848 template <class U> class C; // template_header_p is true
10849 template <class T> class C<T>::D {
10850 class C *c2; // DECL_SELF_REFERENCE_P is true
10853 t
= check_elaborated_type_specifier (tag_code
,
10856 | DECL_SELF_REFERENCE_P (decl
));
10859 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
10861 error ("reference to %qD is ambiguous", name
);
10862 print_candidates (decl
);
10863 return error_mark_node
;
10869 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10870 Define the tag as a forward-reference if it is not defined.
10872 If a declaration is given, process it here, and report an error if
10873 multiple declarations are not identical.
10875 SCOPE is TS_CURRENT when this is also a definition. Only look in
10876 the current frame for the name (since C++ allows new names in any
10877 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10878 declaration. Only look beginning from the current scope outward up
10879 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10881 TEMPLATE_HEADER_P is true when this declaration is preceded by
10882 a set of template parameters. */
10885 xref_tag (enum tag_types tag_code
, tree name
,
10886 tag_scope scope
, bool template_header_p
)
10888 enum tree_code code
;
10890 tree context
= NULL_TREE
;
10892 timevar_push (TV_NAME_LOOKUP
);
10894 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
10900 code
= RECORD_TYPE
;
10906 code
= ENUMERAL_TYPE
;
10909 gcc_unreachable ();
10912 /* In case of anonymous name, xref_tag is only called to
10913 make type node and push name. Name lookup is not required. */
10914 if (ANON_AGGRNAME_P (name
))
10917 t
= lookup_and_check_tag (tag_code
, name
,
10918 scope
, template_header_p
);
10920 if (t
== error_mark_node
)
10921 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10923 if (scope
!= ts_current
&& t
&& current_class_type
10924 && template_class_depth (current_class_type
)
10925 && template_header_p
)
10927 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10928 definition of this tag. Since, in addition, we are currently
10929 processing a (member) template declaration of a template
10930 class, we must be very careful; consider:
10937 { template <class V>
10938 friend struct S1; };
10940 Here, the S2::S1 declaration should not be confused with the
10941 outer declaration. In particular, the inner version should
10942 have a template parameter of level 2, not level 1. This
10943 would be particularly important if the member declaration
10946 template <class V = U> friend struct S1;
10948 say, when we should tsubst into `U' when instantiating
10949 S2. On the other hand, when presented with:
10959 we must find the inner binding eventually. We
10960 accomplish this by making sure that the new type we
10961 create to represent this declaration has the right
10963 context
= TYPE_CONTEXT (t
);
10969 /* If no such tag is yet defined, create a forward-reference node
10970 and record it as the "definition".
10971 When a real declaration of this type is found,
10972 the forward-reference will be altered into a real type. */
10973 if (code
== ENUMERAL_TYPE
)
10975 error ("use of enum %q#D without previous declaration", name
);
10976 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10980 t
= make_class_type (code
);
10981 TYPE_CONTEXT (t
) = context
;
10982 t
= pushtag (name
, t
, scope
);
10987 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
10989 if (!redeclare_class_template (t
, current_template_parms
))
10990 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
10992 else if (!processing_template_decl
10993 && CLASS_TYPE_P (t
)
10994 && CLASSTYPE_IS_TEMPLATE (t
))
10996 error ("redeclaration of %qT as a non-template", t
);
10997 error ("previous declaration %q+D", t
);
10998 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, error_mark_node
);
11001 /* Make injected friend class visible. */
11002 if (scope
!= ts_within_enclosing_non_class
11003 && hidden_name_p (TYPE_NAME (t
)))
11005 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
11006 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
11008 if (TYPE_TEMPLATE_INFO (t
))
11010 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
11011 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
11016 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP
, t
);
11020 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
11022 enum tag_types tag_kind
;
11024 if (TREE_CODE (old
) == RECORD_TYPE
)
11025 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
11027 tag_kind
= union_type
;
11029 if (id
== NULL_TREE
)
11030 id
= TYPE_IDENTIFIER (old
);
11032 return xref_tag (tag_kind
, id
, scope
, false);
11035 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11036 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11037 access_* node, and the TREE_VALUE is the type of the base-class.
11038 Non-NULL TREE_TYPE indicates virtual inheritance.
11040 Returns true if the binfo hierarchy was successfully created,
11041 false if an error was detected. */
11044 xref_basetypes (tree ref
, tree base_list
)
11047 tree binfo
, base_binfo
;
11048 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
11049 unsigned max_bases
= 0; /* Maximum direct bases. */
11051 tree default_access
;
11052 tree igo_prev
; /* Track Inheritance Graph Order. */
11054 if (ref
== error_mark_node
)
11057 /* The base of a derived class is private by default, all others are
11059 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
11060 && CLASSTYPE_DECLARED_CLASS (ref
)
11061 ? access_private_node
: access_public_node
);
11063 /* First, make sure that any templates in base-classes are
11064 instantiated. This ensures that if we call ourselves recursively
11065 we do not get confused about which classes are marked and which
11067 basep
= &base_list
;
11070 tree basetype
= TREE_VALUE (*basep
);
11072 if (!(processing_template_decl
&& uses_template_parms (basetype
))
11073 && !complete_type_or_else (basetype
, NULL
))
11074 /* An incomplete type. Remove it from the list. */
11075 *basep
= TREE_CHAIN (*basep
);
11079 if (TREE_TYPE (*basep
))
11081 if (CLASS_TYPE_P (basetype
))
11082 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
11083 basep
= &TREE_CHAIN (*basep
);
11087 TYPE_MARKED_P (ref
) = 1;
11089 /* The binfo slot should be empty, unless this is an (ill-formed)
11091 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
11093 error ("redefinition of %q#T", ref
);
11097 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
11099 binfo
= make_tree_binfo (max_bases
);
11101 TYPE_BINFO (ref
) = binfo
;
11102 BINFO_OFFSET (binfo
) = size_zero_node
;
11103 BINFO_TYPE (binfo
) = ref
;
11105 /* Apply base-class info set up to the variants of this type. */
11106 fixup_type_variants (ref
);
11110 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
11111 /* An aggregate cannot have baseclasses. */
11112 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
11114 if (TREE_CODE (ref
) == UNION_TYPE
)
11116 error ("derived union %qT invalid", ref
);
11123 if (TYPE_FOR_JAVA (ref
))
11125 error ("Java class %qT cannot have multiple bases", ref
);
11132 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
11134 if (TYPE_FOR_JAVA (ref
))
11136 error ("Java class %qT cannot have virtual bases", ref
);
11141 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
11143 tree access
= TREE_PURPOSE (base_list
);
11144 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
11145 tree basetype
= TREE_VALUE (base_list
);
11147 if (access
== access_default_node
)
11148 access
= default_access
;
11150 if (PACK_EXPANSION_P (basetype
))
11151 basetype
= PACK_EXPANSION_PATTERN (basetype
);
11152 if (TREE_CODE (basetype
) == TYPE_DECL
)
11153 basetype
= TREE_TYPE (basetype
);
11154 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
11156 error ("base type %qT fails to be a struct or class type",
11161 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
11162 TYPE_FOR_JAVA (ref
) = 1;
11164 base_binfo
= NULL_TREE
;
11165 if (CLASS_TYPE_P (basetype
) && !dependent_type_p (basetype
))
11167 base_binfo
= TYPE_BINFO (basetype
);
11168 /* The original basetype could have been a typedef'd type. */
11169 basetype
= BINFO_TYPE (base_binfo
);
11171 /* Inherit flags from the base. */
11172 TYPE_HAS_NEW_OPERATOR (ref
)
11173 |= TYPE_HAS_NEW_OPERATOR (basetype
);
11174 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
11175 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
11176 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
11177 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
11178 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
11179 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
11180 CLASSTYPE_REPEATED_BASE_P (ref
)
11181 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
11184 /* We must do this test after we've seen through a typedef
11186 if (TYPE_MARKED_P (basetype
))
11188 if (basetype
== ref
)
11189 error ("recursive type %qT undefined", basetype
);
11191 error ("duplicate base type %qT invalid", basetype
);
11195 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
11196 /* Regenerate the pack expansion for the bases. */
11197 basetype
= make_pack_expansion (basetype
);
11199 TYPE_MARKED_P (basetype
) = 1;
11201 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
11202 &igo_prev
, via_virtual
);
11203 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
11204 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
11206 BINFO_BASE_APPEND (binfo
, base_binfo
);
11207 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
11210 if (VEC_space (tree
, CLASSTYPE_VBASECLASSES (ref
), 1))
11211 /* If we have space in the vbase vector, we must have shared at
11212 least one of them, and are therefore diamond shaped. */
11213 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
11215 /* Unmark all the types. */
11216 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
11217 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11218 TYPE_MARKED_P (ref
) = 0;
11220 /* Now see if we have a repeated base type. */
11221 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
11223 for (base_binfo
= binfo
; base_binfo
;
11224 base_binfo
= TREE_CHAIN (base_binfo
))
11226 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11228 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
11231 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
11233 for (base_binfo
= binfo
; base_binfo
;
11234 base_binfo
= TREE_CHAIN (base_binfo
))
11235 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11236 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11245 /* Begin compiling the definition of an enumeration type.
11248 UNDERLYING_TYPE is the type that will be used as the storage for
11249 the enumeration type. This should be NULL_TREE if no storage type
11252 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11254 Returns the type object, as yet incomplete.
11255 Also records info about it so that build_enumerator
11256 may be used to declare the individual values as they are read. */
11259 start_enum (tree name
, tree underlying_type
, bool scoped_enum_p
)
11263 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11265 /* If this is the real definition for a previous forward reference,
11266 fill in the contents in the same object that used to be the
11267 forward reference. */
11269 enumtype
= lookup_and_check_tag (enum_type
, name
,
11270 /*tag_scope=*/ts_current
,
11271 /*template_header_p=*/false);
11273 if (enumtype
!= NULL_TREE
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
11275 error_at (input_location
, "multiple definition of %q#T", enumtype
);
11276 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
11277 "previous definition here");
11278 /* Clear out TYPE_VALUES, and start again. */
11279 TYPE_VALUES (enumtype
) = NULL_TREE
;
11283 /* In case of error, make a dummy enum to allow parsing to
11285 if (enumtype
== error_mark_node
)
11286 name
= make_anon_name ();
11288 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
11289 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
11292 if (enumtype
== error_mark_node
)
11297 SET_SCOPED_ENUM_P (enumtype
, 1);
11298 begin_scope (sk_scoped_enum
, enumtype
);
11300 /* [C++0x dcl.enum]p5:
11302 If not explicitly specified, the underlying type of a scoped
11303 enumeration type is int. */
11304 if (!underlying_type
)
11305 underlying_type
= integer_type_node
;
11308 if (underlying_type
)
11310 if (CP_INTEGRAL_TYPE_P (underlying_type
))
11312 TYPE_MIN_VALUE (enumtype
) = TYPE_MIN_VALUE (underlying_type
);
11313 TYPE_MAX_VALUE (enumtype
) = TYPE_MAX_VALUE (underlying_type
);
11314 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
11315 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
11316 SET_TYPE_MODE (enumtype
, TYPE_MODE (underlying_type
));
11317 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (underlying_type
);
11318 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
11319 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
11320 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
11321 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
11323 else if (!dependent_type_p (underlying_type
))
11324 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11325 underlying_type
, enumtype
);
11331 /* After processing and defining all the values of an enumeration type,
11332 install their decls in the enumeration type and finish it off.
11333 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11336 finish_enum (tree enumtype
)
11344 tree underlying_type
= NULL_TREE
;
11345 bool fixed_underlying_type_p
11346 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
11348 /* We built up the VALUES in reverse order. */
11349 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
11351 /* For an enum defined in a template, just set the type of the values;
11352 all further processing is postponed until the template is
11353 instantiated. We need to set the type so that tsubst of a CONST_DECL
11355 if (processing_template_decl
)
11357 for (values
= TYPE_VALUES (enumtype
);
11359 values
= TREE_CHAIN (values
))
11360 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
11361 if (at_function_scope_p ())
11362 add_stmt (build_min (TAG_DEFN
, enumtype
));
11363 if (SCOPED_ENUM_P (enumtype
))
11368 /* Determine the minimum and maximum values of the enumerators. */
11369 if (TYPE_VALUES (enumtype
))
11371 minnode
= maxnode
= NULL_TREE
;
11373 for (values
= TYPE_VALUES (enumtype
);
11375 values
= TREE_CHAIN (values
))
11377 decl
= TREE_VALUE (values
);
11379 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11380 each enumerator has the type of its enumeration. Prior to the
11381 closing brace, the type of each enumerator is the type of its
11382 initializing value. */
11383 TREE_TYPE (decl
) = enumtype
;
11385 /* Update the minimum and maximum values, if appropriate. */
11386 value
= DECL_INITIAL (decl
);
11387 if (value
== error_mark_node
)
11388 value
= integer_zero_node
;
11389 /* Figure out what the minimum and maximum values of the
11390 enumerators are. */
11392 minnode
= maxnode
= value
;
11393 else if (tree_int_cst_lt (maxnode
, value
))
11395 else if (tree_int_cst_lt (value
, minnode
))
11402 If the enumerator-list is empty, the underlying type is as if
11403 the enumeration had a single enumerator with value 0. */
11404 minnode
= maxnode
= integer_zero_node
;
11406 if (!fixed_underlying_type_p
)
11408 /* Compute the number of bits require to represent all values of the
11409 enumeration. We must do this before the type of MINNODE and
11410 MAXNODE are transformed, since tree_int_cst_min_precision relies
11411 on the TREE_TYPE of the value it is passed. */
11412 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
11413 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
11414 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
11415 int precision
= MAX (lowprec
, highprec
);
11417 bool use_short_enum
;
11419 /* Determine the underlying type of the enumeration.
11423 The underlying type of an enumeration is an integral type that
11424 can represent all the enumerator values defined in the
11425 enumeration. It is implementation-defined which integral type is
11426 used as the underlying type for an enumeration except that the
11427 underlying type shall not be larger than int unless the value of
11428 an enumerator cannot fit in an int or unsigned int.
11430 We use "int" or an "unsigned int" as the underlying type, even if
11431 a smaller integral type would work, unless the user has
11432 explicitly requested that we use the smallest possible type. The
11433 user can request that for all enumerations with a command line
11434 flag, or for just one enumeration with an attribute. */
11436 use_short_enum
= flag_short_enums
11437 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
11439 for (itk
= (use_short_enum
? itk_char
: itk_int
);
11443 underlying_type
= integer_types
[itk
];
11444 if (underlying_type
!= NULL_TREE
11445 && TYPE_PRECISION (underlying_type
) >= precision
11446 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
11449 if (itk
== itk_none
)
11453 IF no integral type can represent all the enumerator values, the
11454 enumeration is ill-formed. */
11455 error ("no integral type can represent all of the enumerator values "
11456 "for %qT", enumtype
);
11457 precision
= TYPE_PRECISION (long_long_integer_type_node
);
11458 underlying_type
= integer_types
[itk_unsigned_long_long
];
11463 The value of sizeof() applied to an enumeration type, an object
11464 of an enumeration type, or an enumerator, is the value of sizeof()
11465 applied to the underlying type. */
11466 TYPE_MIN_VALUE (enumtype
) = TYPE_MIN_VALUE (underlying_type
);
11467 TYPE_MAX_VALUE (enumtype
) = TYPE_MAX_VALUE (underlying_type
);
11468 TYPE_SIZE (enumtype
) = TYPE_SIZE (underlying_type
);
11469 TYPE_SIZE_UNIT (enumtype
) = TYPE_SIZE_UNIT (underlying_type
);
11470 SET_TYPE_MODE (enumtype
, TYPE_MODE (underlying_type
));
11471 TYPE_PRECISION (enumtype
) = TYPE_PRECISION (underlying_type
);
11472 TYPE_ALIGN (enumtype
) = TYPE_ALIGN (underlying_type
);
11473 TYPE_USER_ALIGN (enumtype
) = TYPE_USER_ALIGN (underlying_type
);
11474 TYPE_UNSIGNED (enumtype
) = TYPE_UNSIGNED (underlying_type
);
11476 /* Compute the minimum and maximum values for the type.
11480 For an enumeration where emin is the smallest enumerator and emax
11481 is the largest, the values of the enumeration are the values of the
11482 underlying type in the range bmin to bmax, where bmin and bmax are,
11483 respectively, the smallest and largest values of the smallest bit-
11484 field that can store emin and emax. */
11486 /* The middle-end currently assumes that types with TYPE_PRECISION
11487 narrower than their underlying type are suitably zero or sign
11488 extended to fill their mode. Similarly, it assumes that the front
11489 end assures that a value of a particular type must be within
11490 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
11492 We used to set these fields based on bmin and bmax, but that led
11493 to invalid assumptions like optimizing away bounds checking. So
11494 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
11495 TYPE_MAX_VALUE to the values for the mode above and only restrict
11496 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
11497 ENUM_UNDERLYING_TYPE (enumtype
)
11498 = build_distinct_type_copy (underlying_type
);
11499 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
11500 set_min_and_max_values_for_integral_type
11501 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
11503 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
11504 if (flag_strict_enums
)
11505 set_min_and_max_values_for_integral_type (enumtype
, precision
,
11509 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
11511 /* Convert each of the enumerators to the type of the underlying
11512 type of the enumeration. */
11513 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
11515 location_t saved_location
;
11517 decl
= TREE_VALUE (values
);
11518 saved_location
= input_location
;
11519 input_location
= DECL_SOURCE_LOCATION (decl
);
11520 if (fixed_underlying_type_p
)
11521 /* If the enumeration type has a fixed underlying type, we
11522 already checked all of the enumerator values. */
11523 value
= DECL_INITIAL (decl
);
11525 value
= perform_implicit_conversion (underlying_type
,
11526 DECL_INITIAL (decl
),
11527 tf_warning_or_error
);
11528 input_location
= saved_location
;
11530 /* Do not clobber shared ints. */
11531 value
= copy_node (value
);
11533 TREE_TYPE (value
) = enumtype
;
11534 DECL_INITIAL (decl
) = value
;
11537 /* Fix up all variant types of this enum type. */
11538 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
11540 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
11541 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (enumtype
);
11542 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (enumtype
);
11543 TYPE_SIZE (t
) = TYPE_SIZE (enumtype
);
11544 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (enumtype
);
11545 SET_TYPE_MODE (t
, TYPE_MODE (enumtype
));
11546 TYPE_PRECISION (t
) = TYPE_PRECISION (enumtype
);
11547 TYPE_ALIGN (t
) = TYPE_ALIGN (enumtype
);
11548 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (enumtype
);
11549 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (enumtype
);
11550 ENUM_UNDERLYING_TYPE (t
) = ENUM_UNDERLYING_TYPE (enumtype
);
11553 /* Finish up the scope of a scoped enumeration. */
11554 if (SCOPED_ENUM_P (enumtype
))
11557 /* Finish debugging output for this type. */
11558 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
11561 /* Build and install a CONST_DECL for an enumeration constant of the
11562 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11563 Assignment of sequential values by default is handled here. */
11566 build_enumerator (tree name
, tree value
, tree enumtype
)
11572 /* If the VALUE was erroneous, pretend it wasn't there; that will
11573 result in the enum being assigned the next value in sequence. */
11574 if (value
== error_mark_node
)
11577 /* Remove no-op casts from the value. */
11579 STRIP_TYPE_NOPS (value
);
11581 if (! processing_template_decl
)
11583 /* Validate and default VALUE. */
11584 if (value
!= NULL_TREE
)
11586 value
= integral_constant_value (value
);
11588 if (TREE_CODE (value
) == INTEGER_CST
)
11590 value
= perform_integral_promotions (value
);
11591 constant_expression_warning (value
);
11595 error ("enumerator value for %qD is not an integer constant", name
);
11600 /* Default based on previous value. */
11601 if (value
== NULL_TREE
)
11603 if (TYPE_VALUES (enumtype
))
11606 unsigned HOST_WIDE_INT lo
;
11610 /* The next value is the previous value plus one.
11611 add_double doesn't know the type of the target expression,
11612 so we must check with int_fits_type_p as well. */
11613 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
11614 if (error_operand_p (prev_value
))
11615 value
= error_mark_node
;
11618 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
11619 TREE_INT_CST_HIGH (prev_value
),
11621 value
= build_int_cst_wide (TREE_TYPE (prev_value
), lo
, hi
);
11623 |= !int_fits_type_p (value
, TREE_TYPE (prev_value
));
11627 error ("overflow in enumeration values at %qD", name
);
11628 value
= error_mark_node
;
11633 value
= integer_zero_node
;
11636 /* Remove no-op casts from the value. */
11637 STRIP_TYPE_NOPS (value
);
11639 /* If the underlying type of the enum is fixed, check whether
11640 the enumerator values fits in the underlying type. If it
11641 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11642 if (ENUM_UNDERLYING_TYPE (enumtype
)
11644 && TREE_CODE (value
) == INTEGER_CST
11645 && !int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
11647 error ("enumerator value %E is too large for underlying type %<%T%>",
11648 value
, ENUM_UNDERLYING_TYPE (enumtype
));
11650 /* Silently convert the value so that we can continue. */
11651 value
= perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype
),
11656 /* C++ associates enums with global, function, or class declarations. */
11657 context
= current_scope ();
11659 /* Build the actual enumeration constant. Note that the enumeration
11660 constants have the underlying type of the enum (if it is fixed)
11661 or the type of their initializer (if the underlying type of the
11662 enum is not fixed):
11666 If the underlying type is fixed, the type of each enumerator
11667 prior to the closing brace is the underlying type; if the
11668 initializing value of an enumerator cannot be represented by
11669 the underlying type, the program is ill-formed. If the
11670 underlying type is not fixed, the type of each enumerator is
11671 the type of its initializing value.
11673 If the underlying type is not fixed, it will be computed by
11674 finish_enum and we will reset the type of this enumerator. Of
11675 course, if we're processing a template, there may be no value. */
11676 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
11678 if (context
&& context
== current_class_type
)
11679 /* This enum declaration is local to the class. We need the full
11680 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11681 decl
= build_lang_decl (CONST_DECL
, name
, type
);
11683 /* It's a global enum, or it's local to a function. (Note local to
11684 a function could mean local to a class method. */
11685 decl
= build_decl (input_location
, CONST_DECL
, name
, type
);
11687 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
11688 TREE_CONSTANT (decl
) = 1;
11689 TREE_READONLY (decl
) = 1;
11690 DECL_INITIAL (decl
) = value
;
11692 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
11693 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11694 on the TYPE_FIELDS list for `S'. (That's so that you can say
11695 things like `S::i' later.) */
11696 finish_member_declaration (decl
);
11700 /* Add this enumeration constant to the list for this type. */
11701 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
11704 /* Look for an enumerator with the given NAME within the enumeration
11705 type ENUMTYPE. This routine is used primarily for qualified name
11706 lookup into an enumerator in C++0x, e.g.,
11708 enum class Color { Red, Green, Blue };
11710 Color color = Color::Red;
11712 Returns the value corresponding to the enumerator, or
11713 NULL_TREE if no such enumerator was found. */
11715 lookup_enumerator (tree enumtype
, tree name
)
11718 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
11720 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
11721 return e
? TREE_VALUE (e
) : NULL_TREE
;
11725 /* We're defining DECL. Make sure that its type is OK. */
11728 check_function_type (tree decl
, tree current_function_parms
)
11730 tree fntype
= TREE_TYPE (decl
);
11731 tree return_type
= complete_type (TREE_TYPE (fntype
));
11733 /* In a function definition, arg types must be complete. */
11734 require_complete_types_for_parms (current_function_parms
);
11736 /* constexpr functions must have literal argument types and
11737 literal return type. */
11738 validate_constexpr_fundecl (decl
);
11740 if (dependent_type_p (return_type
))
11742 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
11743 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
11745 tree args
= TYPE_ARG_TYPES (fntype
);
11747 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
11748 error ("return type %q#T is incomplete", return_type
);
11750 error ("return type has Java class type %q#T", return_type
);
11752 /* Make it return void instead. */
11753 if (TREE_CODE (fntype
) == METHOD_TYPE
)
11754 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
11756 TREE_CHAIN (args
));
11758 fntype
= build_function_type (void_type_node
, args
);
11760 = build_exception_variant (fntype
,
11761 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
11762 fntype
= (cp_build_type_attribute_variant
11763 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
11764 TREE_TYPE (decl
) = fntype
;
11767 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
11770 /* Create the FUNCTION_DECL for a function definition.
11771 DECLSPECS and DECLARATOR are the parts of the declaration;
11772 they describe the function's name and the type it returns,
11773 but twisted together in a fashion that parallels the syntax of C.
11775 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11776 DECLARATOR is really the DECL for the function we are about to
11777 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11778 indicating that the function is an inline defined in-class.
11780 This function creates a binding context for the function body
11781 as well as setting up the FUNCTION_DECL in current_function_decl.
11783 For C++, we must first check whether that datum makes any sense.
11784 For example, "class A local_a(1,2);" means that variable local_a
11785 is an aggregate of type A, which should have a constructor
11786 applied to it with the argument list [1, 2].
11788 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11789 or may be a BLOCK if the function has been defined previously
11790 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11791 error_mark_node if the function has never been defined, or
11792 a BLOCK if the function has been defined somewhere. */
11795 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
11797 tree ctype
= NULL_TREE
;
11800 int doing_friend
= 0;
11801 struct cp_binding_level
*bl
;
11802 tree current_function_parms
;
11803 struct c_fileinfo
*finfo
11804 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
11805 bool honor_interface
;
11807 /* Sanity check. */
11808 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
11809 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
11811 fntype
= TREE_TYPE (decl1
);
11812 if (TREE_CODE (fntype
) == METHOD_TYPE
)
11813 ctype
= TYPE_METHOD_BASETYPE (fntype
);
11815 /* ISO C++ 11.4/5. A friend function defined in a class is in
11816 the (lexical) scope of the class in which it is defined. */
11817 if (!ctype
&& DECL_FRIEND_P (decl1
))
11819 ctype
= DECL_FRIEND_CONTEXT (decl1
);
11821 /* CTYPE could be null here if we're dealing with a template;
11822 for example, `inline friend float foo()' inside a template
11823 will have no CTYPE set. */
11824 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
11830 if (DECL_DECLARED_INLINE_P (decl1
)
11831 && lookup_attribute ("noinline", attrs
))
11832 warning (0, "inline function %q+D given attribute noinline", decl1
);
11834 /* Handle gnu_inline attribute. */
11835 if (GNU_INLINE_P (decl1
))
11837 DECL_EXTERNAL (decl1
) = 1;
11838 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
11839 DECL_INTERFACE_KNOWN (decl1
) = 1;
11840 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
11843 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
11844 /* This is a constructor, we must ensure that any default args
11845 introduced by this definition are propagated to the clones
11846 now. The clones are used directly in overload resolution. */
11847 adjust_clone_args (decl1
);
11849 /* Sometimes we don't notice that a function is a static member, and
11850 build a METHOD_TYPE for it. Fix that up now. */
11851 if (ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
11852 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
)
11854 revert_static_member_fn (decl1
);
11858 /* Set up current_class_type, and enter the scope of the class, if
11861 push_nested_class (ctype
);
11862 else if (DECL_STATIC_FUNCTION_P (decl1
))
11863 push_nested_class (DECL_CONTEXT (decl1
));
11865 /* Now that we have entered the scope of the class, we must restore
11866 the bindings for any template parameters surrounding DECL1, if it
11867 is an inline member template. (Order is important; consider the
11868 case where a template parameter has the same name as a field of
11869 the class.) It is not until after this point that
11870 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11871 if (flags
& SF_INCLASS_INLINE
)
11872 maybe_begin_member_template_processing (decl1
);
11874 /* Effective C++ rule 15. */
11876 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
11877 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
11878 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
11880 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11881 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11882 if (!DECL_INITIAL (decl1
))
11883 DECL_INITIAL (decl1
) = error_mark_node
;
11885 /* This function exists in static storage.
11886 (This does not mean `static' in the C sense!) */
11887 TREE_STATIC (decl1
) = 1;
11889 /* We must call push_template_decl after current_class_type is set
11890 up. (If we are processing inline definitions after exiting a
11891 class scope, current_class_type will be NULL_TREE until set above
11892 by push_nested_class.) */
11893 if (processing_template_decl
)
11895 /* FIXME: Handle error_mark_node more gracefully. */
11896 tree newdecl1
= push_template_decl (decl1
);
11897 if (newdecl1
!= error_mark_node
)
11901 /* We are now in the scope of the function being defined. */
11902 current_function_decl
= decl1
;
11904 /* Save the parm names or decls from this function's declarator
11905 where store_parm_decls will find them. */
11906 current_function_parms
= DECL_ARGUMENTS (decl1
);
11908 /* Make sure the parameter and return types are reasonable. When
11909 you declare a function, these types can be incomplete, but they
11910 must be complete when you define the function. */
11911 check_function_type (decl1
, current_function_parms
);
11913 /* Build the return declaration for the function. */
11914 restype
= TREE_TYPE (fntype
);
11915 if (DECL_RESULT (decl1
) == NULL_TREE
)
11919 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
11920 DECL_ARTIFICIAL (resdecl
) = 1;
11921 DECL_IGNORED_P (resdecl
) = 1;
11922 DECL_RESULT (decl1
) = resdecl
;
11924 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
11927 /* Let the user know we're compiling this function. */
11928 announce_function (decl1
);
11930 /* Record the decl so that the function name is defined.
11931 If we already have a decl for this name, and it is a FUNCTION_DECL,
11932 use the old decl. */
11933 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
11935 /* A specialization is not used to guide overload resolution. */
11936 if (!DECL_FUNCTION_MEMBER_P (decl1
)
11937 && !(DECL_USE_TEMPLATE (decl1
) &&
11938 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
11940 tree olddecl
= pushdecl (decl1
);
11942 if (olddecl
== error_mark_node
)
11943 /* If something went wrong when registering the declaration,
11944 use DECL1; we have to have a FUNCTION_DECL to use when
11945 parsing the body of the function. */
11949 /* Otherwise, OLDDECL is either a previous declaration
11950 of the same function or DECL1 itself. */
11952 if (warn_missing_declarations
11953 && olddecl
== decl1
11954 && !DECL_MAIN_P (decl1
)
11955 && TREE_PUBLIC (decl1
)
11956 && !DECL_DECLARED_INLINE_P (decl1
))
11960 /* Check whether DECL1 is in an anonymous
11962 for (context
= DECL_CONTEXT (decl1
);
11964 context
= DECL_CONTEXT (context
))
11966 if (TREE_CODE (context
) == NAMESPACE_DECL
11967 && DECL_NAME (context
) == NULL_TREE
)
11971 if (context
== NULL
)
11972 warning (OPT_Wmissing_declarations
,
11973 "no previous declaration for %q+D", decl1
);
11981 /* We need to set the DECL_CONTEXT. */
11982 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
11983 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
11985 fntype
= TREE_TYPE (decl1
);
11987 /* If #pragma weak applies, mark the decl appropriately now.
11988 The pragma only applies to global functions. Because
11989 determining whether or not the #pragma applies involves
11990 computing the mangled name for the declaration, we cannot
11991 apply the pragma until after we have merged this declaration
11992 with any previous declarations; if the original declaration
11993 has a linkage specification, that specification applies to
11994 the definition as well, and may affect the mangled name. */
11995 if (!DECL_CONTEXT (decl1
))
11996 maybe_apply_pragma_weak (decl1
);
11999 /* Reset this in case the call to pushdecl changed it. */
12000 current_function_decl
= decl1
;
12002 gcc_assert (DECL_INITIAL (decl1
));
12004 /* This function may already have been parsed, in which case just
12005 return; our caller will skip over the body without parsing. */
12006 if (DECL_INITIAL (decl1
) != error_mark_node
)
12009 /* Initialize RTL machinery. We cannot do this until
12010 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12011 even when processing a template; this is how we get
12012 CFUN set up, and our per-function variables initialized.
12013 FIXME factor out the non-RTL stuff. */
12014 bl
= current_binding_level
;
12015 allocate_struct_function (decl1
, processing_template_decl
);
12017 /* Initialize the language data structures. Whenever we start
12018 a new function, we destroy temporaries in the usual way. */
12019 cfun
->language
= ggc_alloc_cleared_language_function ();
12020 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
12021 current_binding_level
= bl
;
12023 /* Even though we're inside a function body, we still don't want to
12024 call expand_expr to calculate the size of a variable-sized array.
12025 We haven't necessarily assigned RTL to all variables yet, so it's
12026 not safe to try to expand expressions involving them. */
12027 cfun
->dont_save_pending_sizes_p
= 1;
12029 /* Start the statement-tree, start the tree now. */
12030 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
12032 /* If we are (erroneously) defining a function that we have already
12033 defined before, wipe out what we knew before. */
12034 if (!DECL_PENDING_INLINE_P (decl1
))
12035 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
12037 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
12039 /* We know that this was set up by `grokclassfn'. We do not
12040 wait until `store_parm_decls', since evil parse errors may
12041 never get us to that point. Here we keep the consistency
12042 between `current_class_type' and `current_class_ptr'. */
12043 tree t
= DECL_ARGUMENTS (decl1
);
12045 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
12046 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
12048 cp_function_chain
->x_current_class_ref
12049 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
12050 cp_function_chain
->x_current_class_ptr
= t
;
12052 /* Constructors and destructors need to know whether they're "in
12053 charge" of initializing virtual base classes. */
12054 t
= TREE_CHAIN (t
);
12055 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
12057 current_in_charge_parm
= t
;
12058 t
= TREE_CHAIN (t
);
12060 if (DECL_HAS_VTT_PARM_P (decl1
))
12062 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
12063 current_vtt_parm
= t
;
12067 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
12068 /* Implicitly-defined methods (like the
12069 destructor for a class in which no destructor
12070 is explicitly declared) must not be defined
12071 until their definition is needed. So, we
12072 ignore interface specifications for
12073 compiler-generated functions. */
12074 && !DECL_ARTIFICIAL (decl1
));
12076 if (DECL_INTERFACE_KNOWN (decl1
))
12078 tree ctx
= decl_function_context (decl1
);
12080 if (DECL_NOT_REALLY_EXTERN (decl1
))
12081 DECL_EXTERNAL (decl1
) = 0;
12083 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
12084 && TREE_PUBLIC (ctx
))
12085 /* This is a function in a local class in an extern inline
12087 comdat_linkage (decl1
);
12089 /* If this function belongs to an interface, it is public.
12090 If it belongs to someone else's interface, it is also external.
12091 This only affects inlines and template instantiations. */
12092 else if (!finfo
->interface_unknown
&& honor_interface
)
12094 if (DECL_DECLARED_INLINE_P (decl1
)
12095 || DECL_TEMPLATE_INSTANTIATION (decl1
)
12096 || processing_template_decl
)
12098 DECL_EXTERNAL (decl1
)
12099 = (finfo
->interface_only
12100 || (DECL_DECLARED_INLINE_P (decl1
)
12101 && ! flag_implement_inlines
12102 && !DECL_VINDEX (decl1
)));
12104 /* For WIN32 we also want to put these in linkonce sections. */
12105 maybe_make_one_only (decl1
);
12108 DECL_EXTERNAL (decl1
) = 0;
12109 DECL_INTERFACE_KNOWN (decl1
) = 1;
12110 /* If this function is in an interface implemented in this file,
12111 make sure that the back end knows to emit this function
12113 if (!DECL_EXTERNAL (decl1
))
12114 mark_needed (decl1
);
12116 else if (finfo
->interface_unknown
&& finfo
->interface_only
12117 && honor_interface
)
12119 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12120 interface, we will have both finfo->interface_unknown and
12121 finfo->interface_only set. In that case, we don't want to
12122 use the normal heuristics because someone will supply a
12123 #pragma implementation elsewhere, and deducing it here would
12124 produce a conflict. */
12125 comdat_linkage (decl1
);
12126 DECL_EXTERNAL (decl1
) = 0;
12127 DECL_INTERFACE_KNOWN (decl1
) = 1;
12128 DECL_DEFER_OUTPUT (decl1
) = 1;
12132 /* This is a definition, not a reference.
12133 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12134 if (!GNU_INLINE_P (decl1
))
12135 DECL_EXTERNAL (decl1
) = 0;
12137 if ((DECL_DECLARED_INLINE_P (decl1
)
12138 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12139 && ! DECL_INTERFACE_KNOWN (decl1
))
12140 DECL_DEFER_OUTPUT (decl1
) = 1;
12142 DECL_INTERFACE_KNOWN (decl1
) = 1;
12145 /* Determine the ELF visibility attribute for the function. We must not
12146 do this before calling "pushdecl", as we must allow "duplicate_decls"
12147 to merge any attributes appropriately. We also need to wait until
12149 if (!DECL_CLONED_FUNCTION_P (decl1
))
12150 determine_visibility (decl1
);
12152 begin_scope (sk_function_parms
, decl1
);
12156 if (DECL_DESTRUCTOR_P (decl1
)
12157 || (DECL_CONSTRUCTOR_P (decl1
)
12158 && targetm
.cxx
.cdtor_returns_this ()))
12160 cdtor_label
= build_decl (input_location
,
12161 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
12162 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
12165 start_fname_decls ();
12167 store_parm_decls (current_function_parms
);
12171 /* Like start_preparsed_function, except that instead of a
12172 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12174 Returns 1 on success. If the DECLARATOR is not suitable for a function
12175 (it defines a datum instead), we return 0, which tells
12176 yyparse to report a parse error. */
12179 start_function (cp_decl_specifier_seq
*declspecs
,
12180 const cp_declarator
*declarator
,
12185 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
12186 if (decl1
== error_mark_node
)
12188 /* If the declarator is not suitable for a function definition,
12189 cause a syntax error. */
12190 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
12192 error ("invalid function declaration");
12196 if (DECL_MAIN_P (decl1
))
12197 /* main must return int. grokfndecl should have corrected it
12198 (and issued a diagnostic) if the user got it wrong. */
12199 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
12200 integer_type_node
));
12202 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
12207 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12211 use_eh_spec_block (tree fn
)
12213 return (flag_exceptions
&& flag_enforce_eh_specs
12214 && !processing_template_decl
12215 && !type_throw_all_p (TREE_TYPE (fn
))
12216 /* We insert the EH_SPEC_BLOCK only in the original
12217 function; then, it is copied automatically to the
12219 && !DECL_CLONED_FUNCTION_P (fn
)
12220 /* Implicitly-generated constructors and destructors have
12221 exception specifications. However, those specifications
12222 are the union of the possible exceptions specified by the
12223 constructors/destructors for bases and members, so no
12224 unallowed exception will ever reach this function. By
12225 not creating the EH_SPEC_BLOCK we save a little memory,
12226 and we avoid spurious warnings about unreachable
12228 && !DECL_ARTIFICIAL (fn
));
12231 /* Store the parameter declarations into the current function declaration.
12232 This is called after parsing the parameter declarations, before
12233 digesting the body of the function.
12235 Also install to binding contour return value identifier, if any. */
12238 store_parm_decls (tree current_function_parms
)
12240 tree fndecl
= current_function_decl
;
12243 /* This is a chain of any other decls that came in among the parm
12244 declarations. If a parm is declared with enum {foo, bar} x;
12245 then CONST_DECLs for foo and bar are put here. */
12246 tree nonparms
= NULL_TREE
;
12248 if (current_function_parms
)
12250 /* This case is when the function was defined with an ANSI prototype.
12251 The parms already have decls, so we need not do anything here
12252 except record them as in effect
12253 and complain if any redundant old-style parm decls were written. */
12255 tree specparms
= current_function_parms
;
12258 /* Must clear this because it might contain TYPE_DECLs declared
12260 current_binding_level
->names
= NULL
;
12262 /* If we're doing semantic analysis, then we'll call pushdecl
12263 for each of these. We must do them in reverse order so that
12264 they end in the correct forward order. */
12265 specparms
= nreverse (specparms
);
12267 for (parm
= specparms
; parm
; parm
= next
)
12269 next
= TREE_CHAIN (parm
);
12270 if (TREE_CODE (parm
) == PARM_DECL
)
12272 if (DECL_NAME (parm
) == NULL_TREE
12273 || TREE_CODE (parm
) != VOID_TYPE
)
12276 error ("parameter %qD declared void", parm
);
12280 /* If we find an enum constant or a type tag,
12281 put it aside for the moment. */
12282 TREE_CHAIN (parm
) = NULL_TREE
;
12283 nonparms
= chainon (nonparms
, parm
);
12287 /* Get the decls in their original chain order and record in the
12288 function. This is all and only the PARM_DECLs that were
12289 pushed into scope by the loop above. */
12290 DECL_ARGUMENTS (fndecl
) = getdecls ();
12293 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
12295 /* Now store the final chain of decls for the arguments
12296 as the decl-chain of the current lexical scope.
12297 Put the enumerators in as well, at the front so that
12298 DECL_ARGUMENTS is not modified. */
12299 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
12301 if (use_eh_spec_block (current_function_decl
))
12302 current_eh_spec_block
= begin_eh_spec_block ();
12306 /* We have finished doing semantic analysis on DECL, but have not yet
12307 generated RTL for its body. Save away our current state, so that
12308 when we want to generate RTL later we know what to do. */
12311 save_function_data (tree decl
)
12313 struct language_function
*f
;
12315 /* Save the language-specific per-function data so that we can
12316 get it back when we really expand this function. */
12317 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
12320 f
= ggc_alloc_language_function ();
12321 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
12322 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
12324 /* Clear out the bits we don't need. */
12325 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL_TREE
;
12326 f
->bindings
= NULL
;
12327 f
->x_local_names
= NULL
;
12331 /* Set the return value of the constructor (if present). */
12334 finish_constructor_body (void)
12339 if (targetm
.cxx
.cdtor_returns_this ()
12340 && (! TYPE_FOR_JAVA (current_class_type
)))
12342 /* Any return from a constructor will end up here. */
12343 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
12345 val
= DECL_ARGUMENTS (current_function_decl
);
12346 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
12347 DECL_RESULT (current_function_decl
), val
);
12348 /* Return the address of the object. */
12349 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
12350 add_stmt (exprstmt
);
12354 /* Do all the processing for the beginning of a destructor; set up the
12355 vtable pointers and cleanups for bases and members. */
12358 begin_destructor_body (void)
12360 tree compound_stmt
;
12362 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12363 issued an error message. We still want to try to process the
12364 body of the function, but initialize_vtbl_ptrs will crash if
12365 TYPE_BINFO is NULL. */
12366 if (COMPLETE_TYPE_P (current_class_type
))
12368 compound_stmt
= begin_compound_stmt (0);
12369 /* Make all virtual function table pointers in non-virtual base
12370 classes point to CURRENT_CLASS_TYPE's virtual function
12372 initialize_vtbl_ptrs (current_class_ptr
);
12373 finish_compound_stmt (compound_stmt
);
12375 /* And insert cleanups for our bases and members so that they
12376 will be properly destroyed if we throw. */
12377 push_base_cleanups ();
12381 /* At the end of every destructor we generate code to delete the object if
12382 necessary. Do that now. */
12385 finish_destructor_body (void)
12389 /* Any return from a destructor will end up here; that way all base
12390 and member cleanups will be run when the function returns. */
12391 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
12393 /* In a virtual destructor, we must call delete. */
12394 if (DECL_VIRTUAL_P (current_function_decl
))
12397 tree virtual_size
= cxx_sizeof (current_class_type
);
12401 At the point of definition of a virtual destructor (including
12402 an implicit definition), non-placement operator delete shall
12403 be looked up in the scope of the destructor's class and if
12404 found shall be accessible and unambiguous. */
12405 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
12407 /*global_p=*/false,
12408 /*placement=*/NULL_TREE
,
12409 /*alloc_fn=*/NULL_TREE
);
12411 if_stmt
= begin_if_stmt ();
12412 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
12413 current_in_charge_parm
,
12416 finish_expr_stmt (exprstmt
);
12417 finish_then_clause (if_stmt
);
12418 finish_if_stmt (if_stmt
);
12421 if (targetm
.cxx
.cdtor_returns_this ())
12425 val
= DECL_ARGUMENTS (current_function_decl
);
12426 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
12427 DECL_RESULT (current_function_decl
), val
);
12428 /* Return the address of the object. */
12429 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
12430 add_stmt (exprstmt
);
12434 /* Do the necessary processing for the beginning of a function body, which
12435 in this case includes member-initializers, but not the catch clauses of
12436 a function-try-block. Currently, this means opening a binding level
12437 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12440 begin_function_body (void)
12444 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
12447 if (processing_template_decl
)
12448 /* Do nothing now. */;
12450 /* Always keep the BLOCK node associated with the outermost pair of
12451 curly braces of a function. These are needed for correct
12452 operation of dwarfout.c. */
12453 keep_next_level (true);
12455 stmt
= begin_compound_stmt (BCS_FN_BODY
);
12457 if (processing_template_decl
)
12458 /* Do nothing now. */;
12459 else if (DECL_DESTRUCTOR_P (current_function_decl
))
12460 begin_destructor_body ();
12465 /* Do the processing for the end of a function body. Currently, this means
12466 closing out the cleanups for fully-constructed bases and members, and in
12467 the case of the destructor, deleting the object if desired. Again, this
12468 is only meaningful for [cd]tors, since they are the only functions where
12469 there is a significant distinction between the main body and any
12470 function catch clauses. Handling, say, main() return semantics here
12471 would be wrong, as flowing off the end of a function catch clause for
12472 main() would also need to return 0. */
12475 finish_function_body (tree compstmt
)
12477 if (compstmt
== NULL_TREE
)
12480 /* Close the block. */
12481 finish_compound_stmt (compstmt
);
12483 if (processing_template_decl
)
12484 /* Do nothing now. */;
12485 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
12486 finish_constructor_body ();
12487 else if (DECL_DESTRUCTOR_P (current_function_decl
))
12488 finish_destructor_body ();
12491 /* Given a function, returns the BLOCK corresponding to the outermost level
12492 of curly braces, skipping the artificial block created for constructor
12496 outer_curly_brace_block (tree fndecl
)
12498 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
12499 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
12500 /* Skip the artificial function body block. */
12501 block
= BLOCK_SUBBLOCKS (block
);
12505 /* Finish up a function declaration and compile that function
12506 all the way to assembler language output. The free the storage
12507 for the function definition.
12509 FLAGS is a bitwise or of the following values:
12511 We just finished processing the body of an in-class inline
12512 function definition. (This processing will have taken place
12513 after the class definition is complete.) */
12516 finish_function (int flags
)
12518 tree fndecl
= current_function_decl
;
12519 tree fntype
, ctype
= NULL_TREE
;
12520 int inclass_inline
= (flags
& 2) != 0;
12523 /* When we get some parse errors, we can end up without a
12524 current_function_decl, so cope. */
12525 if (fndecl
== NULL_TREE
)
12526 return error_mark_node
;
12528 gcc_assert (!defer_mark_used_calls
);
12529 defer_mark_used_calls
= true;
12531 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
12532 && DECL_VIRTUAL_P (fndecl
)
12533 && !processing_template_decl
)
12535 tree fnclass
= DECL_CONTEXT (fndecl
);
12536 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
12537 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
12540 nested
= function_depth
> 1;
12541 fntype
= TREE_TYPE (fndecl
);
12543 /* TREE_READONLY (fndecl) = 1;
12544 This caused &foo to be of type ptr-to-const-function
12545 which then got a warning when stored in a ptr-to-function variable. */
12547 gcc_assert (building_stmt_tree ());
12548 /* The current function is being defined, so its DECL_INITIAL should
12549 be set, and unless there's a multiple definition, it should be
12550 error_mark_node. */
12551 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
12553 /* For a cloned function, we've already got all the code we need;
12554 there's no need to add any extra bits. */
12555 if (!DECL_CLONED_FUNCTION_P (fndecl
))
12557 if (DECL_MAIN_P (current_function_decl
))
12561 /* Make it so that `main' always returns 0 by default (or
12564 stmt
= finish_return_stmt (integer_one_node
);
12566 stmt
= finish_return_stmt (integer_zero_node
);
12568 /* Hack. We don't want the middle-end to warn that this
12569 return is unreachable, so put the statement on the
12572 location_t linezero
= linemap_line_start (line_table
, 0, 1);
12573 SET_EXPR_LOCATION (stmt
, linezero
);
12577 if (use_eh_spec_block (current_function_decl
))
12578 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12579 (TREE_TYPE (current_function_decl
)),
12580 current_eh_spec_block
);
12583 /* If we're saving up tree structure, tie off the function now. */
12584 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
12586 finish_fname_decls ();
12588 /* If this function can't throw any exceptions, remember that. */
12589 if (!processing_template_decl
12590 && !cp_function_chain
->can_throw
12591 && !flag_non_call_exceptions
12592 && !DECL_REPLACEABLE_P (fndecl
))
12593 TREE_NOTHROW (fndecl
) = 1;
12595 /* This must come after expand_function_end because cleanups might
12596 have declarations (from inline functions) that need to go into
12597 this function's blocks. */
12599 /* If the current binding level isn't the outermost binding level
12600 for this function, either there is a bug, or we have experienced
12601 syntax errors and the statement tree is malformed. */
12602 if (current_binding_level
->kind
!= sk_function_parms
)
12604 /* Make sure we have already experienced errors. */
12605 gcc_assert (errorcount
);
12607 /* Throw away the broken statement tree and extra binding
12609 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
12611 while (current_binding_level
->kind
!= sk_function_parms
)
12613 if (current_binding_level
->kind
== sk_class
)
12614 pop_nested_class ();
12616 poplevel (0, 0, 0);
12619 poplevel (1, 0, 1);
12621 /* Statements should always be full-expressions at the outermost set
12622 of curly braces for a function. */
12623 gcc_assert (stmts_are_full_exprs_p ());
12625 /* Set up the named return value optimization, if we can. Candidate
12626 variables are selected in check_return_expr. */
12627 if (current_function_return_value
)
12629 tree r
= current_function_return_value
;
12632 if (r
!= error_mark_node
12633 /* This is only worth doing for fns that return in memory--and
12634 simpler, since we don't have to worry about promoted modes. */
12635 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
12636 /* Only allow this for variables declared in the outer scope of
12637 the function so we know that their lifetime always ends with a
12638 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12639 we were to do this optimization in tree-ssa. */
12640 && (outer
= outer_curly_brace_block (fndecl
))
12641 && chain_member (r
, BLOCK_VARS (outer
)))
12642 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
12644 current_function_return_value
= NULL_TREE
;
12647 /* Remember that we were in class scope. */
12648 if (current_class_name
)
12649 ctype
= current_class_type
;
12651 /* Must mark the RESULT_DECL as being in this function. */
12652 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
12654 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12655 to the FUNCTION_DECL node itself. */
12656 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
12658 /* Save away current state, if appropriate. */
12659 if (!processing_template_decl
)
12660 save_function_data (fndecl
);
12662 /* Complain if there's just no return statement. */
12663 if (warn_return_type
12664 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
12665 && !dependent_type_p (TREE_TYPE (fntype
))
12666 && !current_function_returns_value
&& !current_function_returns_null
12667 /* Don't complain if we abort or throw. */
12668 && !current_function_returns_abnormally
12669 /* Don't complain if we are declared noreturn. */
12670 && !TREE_THIS_VOLATILE (fndecl
)
12671 && !DECL_NAME (DECL_RESULT (fndecl
))
12672 && !TREE_NO_WARNING (fndecl
)
12673 /* Structor return values (if any) are set by the compiler. */
12674 && !DECL_CONSTRUCTOR_P (fndecl
)
12675 && !DECL_DESTRUCTOR_P (fndecl
))
12677 warning (OPT_Wreturn_type
,
12678 "no return statement in function returning non-void");
12679 TREE_NO_WARNING (fndecl
) = 1;
12682 /* Store the end of the function, so that we get good line number
12683 info for the epilogue. */
12684 cfun
->function_end_locus
= input_location
;
12686 /* Complain about parameters that are only set, but never otherwise used. */
12687 if (warn_unused_but_set_parameter
12688 && !processing_template_decl
12689 && errorcount
== unused_but_set_errorcount
12690 && !DECL_CLONED_FUNCTION_P (fndecl
))
12694 for (decl
= DECL_ARGUMENTS (fndecl
);
12696 decl
= TREE_CHAIN (decl
))
12697 if (TREE_USED (decl
)
12698 && TREE_CODE (decl
) == PARM_DECL
12699 && !DECL_READ_P (decl
)
12700 && DECL_NAME (decl
)
12701 && !DECL_ARTIFICIAL (decl
)
12702 && !TREE_NO_WARNING (decl
)
12703 && !DECL_IN_SYSTEM_HEADER (decl
)
12704 && TREE_TYPE (decl
) != error_mark_node
12705 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
12706 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
12707 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
12708 warning (OPT_Wunused_but_set_parameter
,
12709 "parameter %q+D set but not used", decl
);
12710 unused_but_set_errorcount
= errorcount
;
12713 /* Genericize before inlining. */
12714 if (!processing_template_decl
)
12716 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
12717 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
12718 cp_genericize (fndecl
);
12719 /* Clear out the bits we don't need. */
12720 f
->x_current_class_ptr
= NULL
;
12721 f
->x_current_class_ref
= NULL
;
12722 f
->x_eh_spec_block
= NULL
;
12723 f
->x_in_charge_parm
= NULL
;
12724 f
->x_vtt_parm
= NULL
;
12725 f
->x_return_value
= NULL
;
12726 f
->bindings
= NULL
;
12727 f
->extern_decl_map
= NULL
;
12729 /* Clear out the bits we don't need. */
12730 local_names
= NULL
;
12732 /* We're leaving the context of this function, so zap cfun. It's still in
12733 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12735 current_function_decl
= NULL
;
12737 /* If this is an in-class inline definition, we may have to pop the
12738 bindings for the template parameters that we added in
12739 maybe_begin_member_template_processing when start_function was
12741 if (inclass_inline
)
12742 maybe_end_member_template_processing ();
12744 /* Leave the scope of the class. */
12746 pop_nested_class ();
12752 /* Let the error reporting routines know that we're outside a
12753 function. For a nested function, this value is used in
12754 cxx_pop_function_context and then reset via pop_function_context. */
12755 current_function_decl
= NULL_TREE
;
12757 defer_mark_used_calls
= false;
12758 if (deferred_mark_used_calls
)
12763 for (i
= 0; VEC_iterate (tree
, deferred_mark_used_calls
, i
, decl
); i
++)
12765 VEC_free (tree
, gc
, deferred_mark_used_calls
);
12771 /* Create the FUNCTION_DECL for a function definition.
12772 DECLSPECS and DECLARATOR are the parts of the declaration;
12773 they describe the return type and the name of the function,
12774 but twisted together in a fashion that parallels the syntax of C.
12776 This function creates a binding context for the function body
12777 as well as setting up the FUNCTION_DECL in current_function_decl.
12779 Returns a FUNCTION_DECL on success.
12781 If the DECLARATOR is not suitable for a function (it defines a datum
12782 instead), we return 0, which tells yyparse to report a parse error.
12784 May return void_type_node indicating that this method is actually
12785 a friend. See grokfield for more details.
12787 Came here with a `.pushlevel' .
12789 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12790 CHANGES TO CODE IN `grokfield'. */
12793 grokmethod (cp_decl_specifier_seq
*declspecs
,
12794 const cp_declarator
*declarator
, tree attrlist
)
12796 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
12799 if (fndecl
== error_mark_node
)
12800 return error_mark_node
;
12802 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
12804 error ("invalid member function declaration");
12805 return error_mark_node
;
12809 cplus_decl_attributes (&fndecl
, attrlist
, 0);
12811 /* Pass friends other than inline friend functions back. */
12812 if (fndecl
== void_type_node
)
12815 if (DECL_IN_AGGR_P (fndecl
))
12817 if (DECL_CONTEXT (fndecl
)
12818 && TREE_CODE (DECL_CONTEXT (fndecl
)) != NAMESPACE_DECL
)
12819 error ("%qD is already defined in class %qT", fndecl
,
12820 DECL_CONTEXT (fndecl
));
12821 return error_mark_node
;
12824 check_template_shadow (fndecl
);
12826 DECL_DECLARED_INLINE_P (fndecl
) = 1;
12827 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
12829 /* We process method specializations in finish_struct_1. */
12830 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
12832 fndecl
= push_template_decl (fndecl
);
12833 if (fndecl
== error_mark_node
)
12837 if (! DECL_FRIEND_P (fndecl
))
12839 if (TREE_CHAIN (fndecl
))
12841 fndecl
= copy_node (fndecl
);
12842 TREE_CHAIN (fndecl
) = NULL_TREE
;
12846 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
12848 DECL_IN_AGGR_P (fndecl
) = 1;
12853 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12854 we can lay it out later, when and if its type becomes complete. */
12857 maybe_register_incomplete_var (tree var
)
12859 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
12861 /* Keep track of variables with incomplete types. */
12862 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
12863 && DECL_EXTERNAL (var
))
12865 tree inner_type
= TREE_TYPE (var
);
12867 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
12868 inner_type
= TREE_TYPE (inner_type
);
12869 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
12871 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
12872 /* RTTI TD entries are created while defining the type_info. */
12873 || (TYPE_LANG_SPECIFIC (inner_type
)
12874 && TYPE_BEING_DEFINED (inner_type
)))
12875 incomplete_vars
= tree_cons (inner_type
, var
, incomplete_vars
);
12879 /* Called when a class type (given by TYPE) is defined. If there are
12880 any existing VAR_DECLs whose type has been completed by this
12881 declaration, update them now. */
12884 complete_vars (tree type
)
12886 tree
*list
= &incomplete_vars
;
12888 gcc_assert (CLASS_TYPE_P (type
));
12891 if (same_type_p (type
, TREE_PURPOSE (*list
)))
12893 tree var
= TREE_VALUE (*list
);
12894 tree type
= TREE_TYPE (var
);
12895 /* Complete the type of the variable. The VAR_DECL itself
12896 will be laid out in expand_expr. */
12897 complete_type (type
);
12898 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
12899 /* Remove this entry from the list. */
12900 *list
= TREE_CHAIN (*list
);
12903 list
= &TREE_CHAIN (*list
);
12906 /* Check for pending declarations which may have abstract type. */
12907 complete_type_check_abstract (type
);
12910 /* If DECL is of a type which needs a cleanup, build and return an
12911 expression to perform that cleanup here. Return NULL_TREE if no
12912 cleanup need be done. */
12915 cxx_maybe_build_cleanup (tree decl
)
12921 /* Assume no cleanup is required. */
12922 cleanup
= NULL_TREE
;
12924 if (error_operand_p (decl
))
12927 /* Handle "__attribute__((cleanup))". We run the cleanup function
12928 before the destructor since the destructor is what actually
12929 terminates the lifetime of the object. */
12930 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
12937 /* Get the name specified by the user for the cleanup function. */
12938 id
= TREE_VALUE (TREE_VALUE (attr
));
12939 /* Look up the name to find the cleanup function to call. It is
12940 important to use lookup_name here because that is what is
12941 used in c-common.c:handle_cleanup_attribute when performing
12942 initial checks on the attribute. Note that those checks
12943 include ensuring that the function found is not an overloaded
12944 function, or an object with an overloaded call operator,
12945 etc.; we can rely on the fact that the function found is an
12946 ordinary FUNCTION_DECL. */
12947 fn
= lookup_name (id
);
12948 arg
= build_address (decl
);
12950 cleanup
= cp_build_function_call_nary (fn
, tf_warning_or_error
,
12953 /* Handle ordinary C++ destructors. */
12954 type
= TREE_TYPE (decl
);
12955 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
12957 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
12958 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
12959 && CLASSTYPE_VBASECLASSES (type
));
12963 if (TREE_CODE (type
) == ARRAY_TYPE
)
12966 addr
= build_address (decl
);
12968 /* Optimize for space over speed here. */
12969 if (!has_vbases
|| flag_expensive_optimizations
)
12970 flags
|= LOOKUP_NONVIRTUAL
;
12972 call
= build_delete (TREE_TYPE (addr
), addr
,
12973 sfk_complete_destructor
, flags
, 0);
12975 cleanup
= build_compound_expr (input_location
, cleanup
, call
);
12983 /* When a stmt has been parsed, this function is called. */
12990 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
12991 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
12992 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
12995 static_fn_type (tree memfntype
)
13000 if (TYPE_PTRMEMFUNC_P (memfntype
))
13001 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
13002 if (POINTER_TYPE_P (memfntype
)
13003 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
13004 memfntype
= TREE_TYPE (memfntype
);
13005 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
13007 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
13008 args
= TYPE_ARG_TYPES (memfntype
);
13009 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
13010 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
));
13011 fntype
= (cp_build_type_attribute_variant
13012 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
13013 fntype
= (build_exception_variant
13014 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
13018 /* DECL was originally constructed as a non-static member function,
13019 but turned out to be static. Update it accordingly. */
13022 revert_static_member_fn (tree decl
)
13024 TREE_TYPE (decl
) = static_fn_type (decl
);
13026 if (cp_type_quals (TREE_TYPE (decl
)) != TYPE_UNQUALIFIED
)
13027 error ("static member function %q#D declared with type qualifiers", decl
);
13029 if (DECL_ARGUMENTS (decl
))
13030 DECL_ARGUMENTS (decl
) = TREE_CHAIN (DECL_ARGUMENTS (decl
));
13031 DECL_STATIC_FUNCTION_P (decl
) = 1;
13034 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13035 one of the language-independent trees. */
13037 enum cp_tree_node_structure_enum
13038 cp_tree_node_structure (union lang_tree_node
* t
)
13040 switch (TREE_CODE (&t
->generic
))
13042 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
13043 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
13044 case OVERLOAD
: return TS_CP_OVERLOAD
;
13045 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
13046 case PTRMEM_CST
: return TS_CP_PTRMEM
;
13047 case BASELINK
: return TS_CP_BASELINK
;
13048 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
13049 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
13050 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
13051 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
13052 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
13053 default: return TS_CP_GENERIC
;
13057 /* Build the void_list_node (void_type_node having been created). */
13059 build_void_list_node (void)
13061 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
13066 cp_missing_noreturn_ok_p (tree decl
)
13068 /* A missing noreturn is ok for the `main' function. */
13069 return DECL_MAIN_P (decl
);
13072 /* Return the COMDAT group into which DECL should be placed. */
13075 cxx_comdat_group (tree decl
)
13079 /* Virtual tables, construction virtual tables, and virtual table
13080 tables all go in a single COMDAT group, named after the primary
13082 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
13083 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
13084 /* For all other DECLs, the COMDAT group is the mangled name of the
13085 declaration itself. */
13088 while (DECL_THUNK_P (decl
))
13090 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13091 into the same section as the target function. In that case
13092 we must return target's name. */
13093 tree target
= THUNK_TARGET (decl
);
13094 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
13095 && DECL_SECTION_NAME (target
) != NULL
13096 && DECL_ONE_ONLY (target
))
13101 name
= DECL_ASSEMBLER_NAME (decl
);
13107 #include "gt-cp-decl.h"