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, 2011, 2012
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"
47 #include "c-family/c-common.h"
48 #include "c-family/c-objc.h"
49 #include "c-family/c-pragma.h"
50 #include "diagnostic.h"
54 #include "pointer-set.h"
55 #include "splay-tree.h"
58 /* Possible cases of bad specifiers type used by bad_specifiers. */
60 BSP_VAR
, /* variable */
61 BSP_PARM
, /* parameter */
66 static tree
grokparms (tree parmlist
, tree
*);
67 static const char *redeclaration_error_message (tree
, tree
);
69 static int decl_jump_unsafe (tree
);
70 static void require_complete_types_for_parms (tree
);
71 static int ambi_op_p (enum tree_code
);
72 static int unary_op_p (enum tree_code
);
73 static void push_local_name (tree
);
74 static tree
grok_reference_init (tree
, tree
, tree
, int);
75 static tree
grokvardecl (tree
, tree
, const cp_decl_specifier_seq
*,
77 static int check_static_variable_definition (tree
, tree
);
78 static void record_unknown_type (tree
, const char *);
79 static tree
builtin_function_1 (tree
, tree
, bool);
80 static tree
build_library_fn_1 (tree
, enum tree_code
, tree
);
81 static int member_function_or_else (tree
, tree
, enum overload_flags
);
82 static void bad_specifiers (tree
, enum bad_spec_place
, int, int, int, int,
84 static void check_for_uninitialized_const_var (tree
);
85 static hashval_t
typename_hash (const void *);
86 static int typename_compare (const void *, const void *);
87 static tree
local_variable_p_walkfn (tree
*, int *, void *);
88 static tree
record_builtin_java_type (const char *, int);
89 static const char *tag_name (enum tag_types
);
90 static tree
lookup_and_check_tag (enum tag_types
, tree
, tag_scope
, bool);
91 static int walk_namespaces_r (tree
, walk_namespaces_fn
, void *);
92 static void maybe_deduce_size_from_array_init (tree
, tree
);
93 static void layout_var_decl (tree
);
94 static tree
check_initializer (tree
, tree
, int, VEC(tree
,gc
) **);
95 static void make_rtl_for_nonlocal_decl (tree
, tree
, const char *);
96 static void save_function_data (tree
);
97 static void copy_type_enum (tree
, tree
);
98 static void check_function_type (tree
, tree
);
99 static void finish_constructor_body (void);
100 static void begin_destructor_body (void);
101 static void finish_destructor_body (void);
102 static void record_key_method_defined (tree
);
103 static tree
create_array_type_for_decl (tree
, tree
, tree
);
104 static tree
get_atexit_node (void);
105 static tree
get_dso_handle_node (void);
106 static tree
start_cleanup_fn (void);
107 static void end_cleanup_fn (void);
108 static tree
cp_make_fname_decl (location_t
, tree
, int);
109 static void initialize_predefined_identifiers (void);
110 static tree check_special_function_return_type
111 (special_function_kind
, tree
, tree
);
112 static tree
push_cp_library_fn (enum tree_code
, tree
);
113 static tree
build_cp_library_fn (tree
, enum tree_code
, tree
);
114 static void store_parm_decls (tree
);
115 static void initialize_local_var (tree
, tree
);
116 static void expand_static_init (tree
, tree
);
118 /* The following symbols are subsumed in the cp_global_trees array, and
119 listed here individually for documentation purposes.
122 tree wchar_decl_node;
124 tree vtable_entry_type;
125 tree delta_type_node;
126 tree __t_desc_type_node;
128 tree class_type_node;
129 tree unknown_type_node;
131 Array type `vtable_entry_type[]'
134 tree vtbl_ptr_type_node;
141 A FUNCTION_DECL which can call `abort'. Not necessarily the
142 one that the user will declare, but sufficient to be called
143 by routines that want to abort the program.
147 The FUNCTION_DECL for the default `::operator delete'.
149 tree global_delete_fndecl;
152 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
153 tree tinfo_var_id; */
155 tree cp_global_trees
[CPTI_MAX
];
157 /* Indicates that there is a type value in some namespace, although
158 that is not necessarily in scope at the moment. */
160 tree global_type_node
;
162 /* The node that holds the "name" of the global scope. */
163 tree global_scope_name
;
165 #define local_names cp_function_chain->x_local_names
167 /* A list of objects which have constructors or destructors
168 which reside in the global scope. The decl is stored in
169 the TREE_VALUE slot and the initializer is stored
170 in the TREE_PURPOSE slot. */
171 tree static_aggregates
;
175 /* A node for the integer constant 2. */
177 tree integer_two_node
;
179 /* Used only for jumps to as-yet undefined labels, since jumps to
180 defined labels can have their validity checked immediately. */
182 struct GTY((chain_next ("%h.next"))) named_label_use_entry
{
183 struct named_label_use_entry
*next
;
184 /* The binding level to which this entry is *currently* attached.
185 This is initially the binding level in which the goto appeared,
186 but is modified as scopes are closed. */
187 cp_binding_level
*binding_level
;
188 /* The head of the names list that was current when the goto appeared,
189 or the inner scope popped. These are the decls that will *not* be
190 skipped when jumping to the label. */
192 /* The location of the goto, for error reporting. */
193 location_t o_goto_locus
;
194 /* True if an OpenMP structured block scope has been closed since
195 the goto appeared. This means that the branch from the label will
196 illegally exit an OpenMP scope. */
200 /* A list of all LABEL_DECLs in the function that have names. Here so
201 we can clear out their names' definitions at the end of the
202 function, and so we can check the validity of jumps to these labels. */
204 struct GTY(()) named_label_entry
{
205 /* The decl itself. */
208 /* The binding level to which the label is *currently* attached.
209 This is initially set to the binding level in which the label
210 is defined, but is modified as scopes are closed. */
211 cp_binding_level
*binding_level
;
212 /* The head of the names list that was current when the label was
213 defined, or the inner scope popped. These are the decls that will
214 be skipped when jumping to the label. */
216 /* A vector of all decls from all binding levels that would be
217 crossed by a backward branch to the label. */
218 VEC(tree
,gc
) *bad_decls
;
220 /* A list of uses of the label, before the label is defined. */
221 struct named_label_use_entry
*uses
;
223 /* The following bits are set after the label is defined, and are
224 updated as scopes are popped. They indicate that a backward jump
225 to the label will illegally enter a scope of the given flavor. */
231 #define named_labels cp_function_chain->x_named_labels
233 /* The number of function bodies which we are currently processing.
234 (Zero if we are at namespace scope, one inside the body of a
235 function, two inside the body of a function in a local class, etc.) */
238 /* To avoid unwanted recursion, finish_function defers all mark_used calls
239 encountered during its execution until it finishes. */
240 bool defer_mark_used_calls
;
241 VEC(tree
, gc
) *deferred_mark_used_calls
;
243 /* States indicating how grokdeclarator() should handle declspecs marked
244 with __attribute__((deprecated)). An object declared as
245 __attribute__((deprecated)) suppresses warnings of uses of other
247 enum deprecated_states deprecated_state
= DEPRECATED_NORMAL
;
250 /* A list of VAR_DECLs whose type was incomplete at the time the
251 variable was declared. */
253 typedef struct GTY(()) incomplete_var_d
{
255 tree incomplete_type
;
258 DEF_VEC_O(incomplete_var
);
259 DEF_VEC_ALLOC_O(incomplete_var
,gc
);
261 static GTY(()) VEC(incomplete_var
,gc
) *incomplete_vars
;
263 /* Returns the kind of template specialization we are currently
264 processing, given that it's declaration contained N_CLASS_SCOPES
265 explicit scope qualifications. */
268 current_tmpl_spec_kind (int n_class_scopes
)
270 int n_template_parm_scopes
= 0;
271 int seen_specialization_p
= 0;
272 int innermost_specialization_p
= 0;
275 /* Scan through the template parameter scopes. */
276 for (b
= current_binding_level
;
277 b
->kind
== sk_template_parms
;
280 /* If we see a specialization scope inside a parameter scope,
281 then something is wrong. That corresponds to a declaration
284 template <class T> template <> ...
286 which is always invalid since [temp.expl.spec] forbids the
287 specialization of a class member template if the enclosing
288 class templates are not explicitly specialized as well. */
289 if (b
->explicit_spec_p
)
291 if (n_template_parm_scopes
== 0)
292 innermost_specialization_p
= 1;
294 seen_specialization_p
= 1;
296 else if (seen_specialization_p
== 1)
297 return tsk_invalid_member_spec
;
299 ++n_template_parm_scopes
;
302 /* Handle explicit instantiations. */
303 if (processing_explicit_instantiation
)
305 if (n_template_parm_scopes
!= 0)
306 /* We've seen a template parameter list during an explicit
307 instantiation. For example:
309 template <class T> template void f(int);
311 This is erroneous. */
312 return tsk_invalid_expl_inst
;
314 return tsk_expl_inst
;
317 if (n_template_parm_scopes
< n_class_scopes
)
318 /* We've not seen enough template headers to match all the
319 specialized classes present. For example:
321 template <class T> void R<T>::S<T>::f(int);
323 This is invalid; there needs to be one set of template
324 parameters for each class. */
325 return tsk_insufficient_parms
;
326 else if (n_template_parm_scopes
== n_class_scopes
)
327 /* We're processing a non-template declaration (even though it may
328 be a member of a template class.) For example:
330 template <class T> void S<T>::f(int);
332 The `class T' matches the `S<T>', leaving no template headers
333 corresponding to the `f'. */
335 else if (n_template_parm_scopes
> n_class_scopes
+ 1)
336 /* We've got too many template headers. For example:
338 template <> template <class T> void f (T);
340 There need to be more enclosing classes. */
341 return tsk_excessive_parms
;
343 /* This must be a template. It's of the form:
345 template <class T> template <class U> void S<T>::f(U);
347 This is a specialization if the innermost level was a
348 specialization; otherwise it's just a definition of the
350 return innermost_specialization_p
? tsk_expl_spec
: tsk_template
;
353 /* Exit the current scope. */
361 /* When a label goes out of scope, check to see if that label was used
362 in a valid manner, and issue any appropriate warnings or errors. */
365 pop_label (tree label
, tree old_value
)
367 if (!processing_template_decl
)
369 if (DECL_INITIAL (label
) == NULL_TREE
)
373 error ("label %q+D used but not defined", label
);
374 location
= input_location
; /* FIXME want (input_filename, (line)0) */
375 /* Avoid crashing later. */
376 define_label (location
, DECL_NAME (label
));
379 warn_for_unused_label (label
);
382 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label
), old_value
);
385 /* At the end of a function, all labels declared within the function
386 go out of scope. BLOCK is the top-level block for the
390 pop_labels_1 (void **slot
, void *data
)
392 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
393 tree block
= (tree
) data
;
395 pop_label (ent
->label_decl
, NULL_TREE
);
397 /* Put the labels into the "variables" of the top-level block,
398 so debugger can see them. */
399 DECL_CHAIN (ent
->label_decl
) = BLOCK_VARS (block
);
400 BLOCK_VARS (block
) = ent
->label_decl
;
402 htab_clear_slot (named_labels
, slot
);
408 pop_labels (tree block
)
412 htab_traverse (named_labels
, pop_labels_1
, block
);
417 /* At the end of a block with local labels, restore the outer definition. */
420 pop_local_label (tree label
, tree old_value
)
422 struct named_label_entry dummy
;
425 pop_label (label
, old_value
);
427 dummy
.label_decl
= label
;
428 slot
= htab_find_slot (named_labels
, &dummy
, NO_INSERT
);
429 htab_clear_slot (named_labels
, slot
);
432 /* The following two routines are used to interface to Objective-C++.
433 The binding level is purposely treated as an opaque type. */
436 objc_get_current_scope (void)
438 return current_binding_level
;
441 /* The following routine is used by the NeXT-style SJLJ exceptions;
442 variables get marked 'volatile' so as to not be clobbered by
443 _setjmp()/_longjmp() calls. All variables in the current scope,
444 as well as parent scopes up to (but not including) ENCLOSING_BLK
445 shall be thusly marked. */
448 objc_mark_locals_volatile (void *enclosing_blk
)
450 cp_binding_level
*scope
;
452 for (scope
= current_binding_level
;
453 scope
&& scope
!= enclosing_blk
;
454 scope
= scope
->level_chain
)
458 for (decl
= scope
->names
; decl
; decl
= TREE_CHAIN (decl
))
459 objc_volatilize_decl (decl
);
461 /* Do not climb up past the current function. */
462 if (scope
->kind
== sk_function_parms
)
467 /* Update data for defined and undefined labels when leaving a scope. */
470 poplevel_named_label_1 (void **slot
, void *data
)
472 struct named_label_entry
*ent
= (struct named_label_entry
*) *slot
;
473 cp_binding_level
*bl
= (cp_binding_level
*) data
;
474 cp_binding_level
*obl
= bl
->level_chain
;
476 if (ent
->binding_level
== bl
)
480 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
481 TREE_LISTs representing OVERLOADs, so be careful. */
482 for (decl
= ent
->names_in_scope
; decl
; decl
= (DECL_P (decl
)
484 : TREE_CHAIN (decl
)))
485 if (decl_jump_unsafe (decl
))
486 VEC_safe_push (tree
, gc
, ent
->bad_decls
, decl
);
488 ent
->binding_level
= obl
;
489 ent
->names_in_scope
= obl
->names
;
493 ent
->in_try_scope
= true;
496 ent
->in_catch_scope
= true;
499 ent
->in_omp_scope
= true;
507 struct named_label_use_entry
*use
;
509 for (use
= ent
->uses
; use
; use
= use
->next
)
510 if (use
->binding_level
== bl
)
512 use
->binding_level
= obl
;
513 use
->names_in_scope
= obl
->names
;
514 if (bl
->kind
== sk_omp
)
515 use
->in_omp_scope
= true;
522 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
523 when errors were reported, except for -Werror-unused-but-set-*. */
524 static int unused_but_set_errorcount
;
526 /* Exit a binding level.
527 Pop the level off, and restore the state of the identifier-decl mappings
528 that were in effect when this level was entered.
530 If KEEP == 1, this level had explicit declarations, so
531 and create a "block" (a BLOCK node) for the level
532 to record its declarations and subblocks for symbol table output.
534 If FUNCTIONBODY is nonzero, this level is the body of a function,
535 so create a block as if KEEP were set and also clear out all
538 If REVERSE is nonzero, reverse the order of decls before putting
539 them into the BLOCK. */
542 poplevel (int keep
, int reverse
, int functionbody
)
545 /* The chain of decls was accumulated in reverse order.
546 Put it into forward order, just for cleanliness. */
551 int leaving_for_scope
;
554 cp_label_binding
*label_bind
;
556 timevar_start (TV_NAME_LOOKUP
);
561 gcc_assert (current_binding_level
->kind
!= sk_class
);
563 if (current_binding_level
->kind
== sk_cleanup
)
565 subblocks
= functionbody
>= 0 ? current_binding_level
->blocks
: 0;
567 gcc_assert (!VEC_length(cp_class_binding
,
568 current_binding_level
->class_shadowed
));
570 /* We used to use KEEP == 2 to indicate that the new block should go
571 at the beginning of the list of blocks at this binding level,
572 rather than the end. This hack is no longer used. */
573 gcc_assert (keep
== 0 || keep
== 1);
575 if (current_binding_level
->keep
)
578 /* Any uses of undefined labels, and any defined labels, now operate
579 under constraints of next binding contour. */
580 if (cfun
&& !functionbody
&& named_labels
)
581 htab_traverse (named_labels
, poplevel_named_label_1
,
582 current_binding_level
);
584 /* Get the decls in the order they were written.
585 Usually current_binding_level->names is in reverse order.
586 But parameter decls were previously put in forward order. */
589 current_binding_level
->names
590 = decls
= nreverse (current_binding_level
->names
);
592 decls
= current_binding_level
->names
;
594 /* If there were any declarations or structure tags in that level,
595 or if this level is a function body,
596 create a BLOCK to record them for the life of this function. */
598 if (keep
== 1 || functionbody
)
599 block
= make_node (BLOCK
);
600 if (block
!= NULL_TREE
)
602 BLOCK_VARS (block
) = decls
;
603 BLOCK_SUBBLOCKS (block
) = subblocks
;
606 /* In each subblock, record that this is its superior. */
608 for (link
= subblocks
; link
; link
= BLOCK_CHAIN (link
))
609 BLOCK_SUPERCONTEXT (link
) = block
;
611 /* We still support the old for-scope rules, whereby the variables
612 in a for-init statement were in scope after the for-statement
613 ended. We only use the new rules if flag_new_for_scope is
616 = current_binding_level
->kind
== sk_for
&& flag_new_for_scope
== 1;
618 /* Before we remove the declarations first check for unused variables. */
619 if ((warn_unused_variable
|| warn_unused_but_set_variable
)
620 && !processing_template_decl
)
621 for (decl
= getdecls (); decl
; decl
= TREE_CHAIN (decl
))
622 if (TREE_CODE (decl
) == VAR_DECL
623 && (! TREE_USED (decl
) || !DECL_READ_P (decl
))
624 && ! DECL_IN_SYSTEM_HEADER (decl
)
625 && DECL_NAME (decl
) && ! DECL_ARTIFICIAL (decl
))
627 if (! TREE_USED (decl
))
628 warning (OPT_Wunused_variable
, "unused variable %q+D", decl
);
629 else if (DECL_CONTEXT (decl
) == current_function_decl
630 && TREE_TYPE (decl
) != error_mark_node
631 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
632 && errorcount
== unused_but_set_errorcount
633 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
634 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
636 warning (OPT_Wunused_but_set_variable
,
637 "variable %q+D set but not used", decl
);
638 unused_but_set_errorcount
= errorcount
;
642 /* Remove declarations for all the DECLs in this level. */
643 for (link
= decls
; link
; link
= TREE_CHAIN (link
))
645 if (leaving_for_scope
&& TREE_CODE (link
) == VAR_DECL
646 /* It's hard to make this ARM compatibility hack play nicely with
647 lambdas, and it really isn't necessary in C++11 mode. */
648 && cxx_dialect
< cxx0x
651 tree name
= DECL_NAME (link
);
655 ob
= outer_binding (name
,
656 IDENTIFIER_BINDING (name
),
659 ns_binding
= IDENTIFIER_NAMESPACE_VALUE (name
);
661 ns_binding
= NULL_TREE
;
663 if (ob
&& ob
->scope
== current_binding_level
->level_chain
)
664 /* We have something like:
669 and we are leaving the `for' scope. There's no reason to
670 keep the binding of the inner `i' in this case. */
671 pop_binding (name
, link
);
672 else if ((ob
&& (TREE_CODE (ob
->value
) == TYPE_DECL
))
673 || (ns_binding
&& TREE_CODE (ns_binding
) == TYPE_DECL
))
674 /* Here, we have something like:
682 We must pop the for-scope binding so we know what's a
683 type and what isn't. */
684 pop_binding (name
, link
);
687 /* Mark this VAR_DECL as dead so that we can tell we left it
688 there only for backward compatibility. */
689 DECL_DEAD_FOR_LOCAL (link
) = 1;
691 /* Keep track of what should have happened when we
692 popped the binding. */
695 SET_DECL_SHADOWED_FOR_VAR (link
, ob
->value
);
696 DECL_HAS_SHADOWED_FOR_VAR_P (link
) = 1;
699 /* Add it to the list of dead variables in the next
700 outermost binding to that we can remove these when we
701 leave that binding. */
702 VEC_safe_push (tree
, gc
,
703 current_binding_level
->level_chain
->dead_vars_from_for
,
706 /* Although we don't pop the cxx_binding, we do clear
707 its SCOPE since the scope is going away now. */
708 IDENTIFIER_BINDING (name
)->scope
709 = current_binding_level
->level_chain
;
716 /* Remove the binding. */
719 if (TREE_CODE (decl
) == TREE_LIST
)
720 decl
= TREE_VALUE (decl
);
723 if (TREE_CODE (name
) == OVERLOAD
)
724 name
= OVL_FUNCTION (name
);
726 gcc_assert (DECL_P (name
));
727 pop_binding (DECL_NAME (name
), decl
);
731 /* Remove declarations for any `for' variables from inner scopes
732 that we kept around. */
733 FOR_EACH_VEC_ELT_REVERSE (tree
, current_binding_level
->dead_vars_from_for
,
735 pop_binding (DECL_NAME (decl
), decl
);
737 /* Restore the IDENTIFIER_TYPE_VALUEs. */
738 for (link
= current_binding_level
->type_shadowed
;
739 link
; link
= TREE_CHAIN (link
))
740 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link
), TREE_VALUE (link
));
742 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
743 FOR_EACH_VEC_ELT_REVERSE (cp_label_binding
,
744 current_binding_level
->shadowed_labels
,
746 pop_local_label (label_bind
->label
, label_bind
->prev_value
);
748 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
749 list if a `using' declaration put them there. The debugging
750 back ends won't understand OVERLOAD, so we remove them here.
751 Because the BLOCK_VARS are (temporarily) shared with
752 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
753 popped all the bindings. */
758 for (d
= &BLOCK_VARS (block
); *d
; )
760 if (TREE_CODE (*d
) == TREE_LIST
)
761 *d
= TREE_CHAIN (*d
);
763 d
= &DECL_CHAIN (*d
);
767 /* If the level being exited is the top level of a function,
768 check over all the labels. */
771 /* Since this is the top level block of a function, the vars are
772 the function's parameters. Don't leave them in the BLOCK
773 because they are found in the FUNCTION_DECL instead. */
774 BLOCK_VARS (block
) = 0;
778 kind
= current_binding_level
->kind
;
779 if (kind
== sk_cleanup
)
783 /* If this is a temporary binding created for a cleanup, then we'll
784 have pushed a statement list level. Pop that, create a new
785 BIND_EXPR for the block, and insert it into the stream. */
786 stmt
= pop_stmt_list (current_binding_level
->statement_list
);
787 stmt
= c_build_bind_expr (input_location
, block
, stmt
);
794 /* The current function is being defined, so its DECL_INITIAL
795 should be error_mark_node. */
796 gcc_assert (DECL_INITIAL (current_function_decl
) == error_mark_node
);
797 DECL_INITIAL (current_function_decl
) = block
;
800 current_binding_level
->blocks
801 = block_chainon (current_binding_level
->blocks
, block
);
803 /* If we did not make a block for the level just exited,
804 any blocks made for inner levels
805 (since they cannot be recorded as subblocks in that level)
806 must be carried forward so they will later become subblocks
807 of something else. */
809 current_binding_level
->blocks
810 = block_chainon (current_binding_level
->blocks
, subblocks
);
812 /* Each and every BLOCK node created here in `poplevel' is important
813 (e.g. for proper debugging information) so if we created one
814 earlier, mark it as "used". */
816 TREE_USED (block
) = 1;
818 /* All temporary bindings created for cleanups are popped silently. */
819 if (kind
== sk_cleanup
)
822 timevar_stop (TV_NAME_LOOKUP
);
826 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
827 itself, calling F for each. The DATA is passed to F as well. */
830 walk_namespaces_r (tree name_space
, walk_namespaces_fn f
, void* data
)
833 tree current
= NAMESPACE_LEVEL (name_space
)->namespaces
;
835 result
|= (*f
) (name_space
, data
);
837 for (; current
; current
= DECL_CHAIN (current
))
838 result
|= walk_namespaces_r (current
, f
, data
);
843 /* Walk all the namespaces, calling F for each. The DATA is passed to
847 walk_namespaces (walk_namespaces_fn f
, void* data
)
849 return walk_namespaces_r (global_namespace
, f
, data
);
852 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
853 DATA is non-NULL, this is the last time we will call
854 wrapup_global_declarations for this NAMESPACE. */
857 wrapup_globals_for_namespace (tree name_space
, void* data
)
859 cp_binding_level
*level
= NAMESPACE_LEVEL (name_space
);
860 VEC(tree
,gc
) *statics
= level
->static_decls
;
861 tree
*vec
= VEC_address (tree
, statics
);
862 int len
= VEC_length (tree
, statics
);
863 int last_time
= (data
!= 0);
867 check_global_declarations (vec
, len
);
868 emit_debug_global_declarations (vec
, len
);
872 /* Write out any globals that need to be output. */
873 return wrapup_global_declarations (vec
, len
);
877 /* In C++, you don't have to write `struct S' to refer to `S'; you
878 can just use `S'. We accomplish this by creating a TYPE_DECL as
879 if the user had written `typedef struct S S'. Create and return
880 the TYPE_DECL for TYPE. */
883 create_implicit_typedef (tree name
, tree type
)
887 decl
= build_decl (input_location
, TYPE_DECL
, name
, type
);
888 DECL_ARTIFICIAL (decl
) = 1;
889 /* There are other implicit type declarations, like the one *within*
890 a class that allows you to write `S::S'. We must distinguish
892 SET_DECL_IMPLICIT_TYPEDEF_P (decl
);
893 TYPE_NAME (type
) = decl
;
894 TYPE_STUB_DECL (type
) = decl
;
899 /* Remember a local name for name-mangling purposes. */
902 push_local_name (tree decl
)
907 timevar_start (TV_NAME_LOOKUP
);
909 name
= DECL_NAME (decl
);
911 nelts
= VEC_length (tree
, local_names
);
912 for (i
= 0; i
< nelts
; i
++)
914 t
= VEC_index (tree
, local_names
, i
);
915 if (DECL_NAME (t
) == name
)
917 if (!DECL_LANG_SPECIFIC (decl
))
918 retrofit_lang_decl (decl
);
919 DECL_LANG_SPECIFIC (decl
)->u
.base
.u2sel
= 1;
920 if (DECL_LANG_SPECIFIC (t
))
921 DECL_DISCRIMINATOR (decl
) = DECL_DISCRIMINATOR (t
) + 1;
923 DECL_DISCRIMINATOR (decl
) = 1;
925 VEC_replace (tree
, local_names
, i
, decl
);
926 timevar_stop (TV_NAME_LOOKUP
);
931 VEC_safe_push (tree
, gc
, local_names
, decl
);
932 timevar_stop (TV_NAME_LOOKUP
);
935 /* Subroutine of duplicate_decls: return truthvalue of whether
936 or not types of these decls match.
938 For C++, we must compare the parameter list so that `int' can match
939 `int&' in a parameter position, but `int&' is not confused with
943 decls_match (tree newdecl
, tree olddecl
)
947 if (newdecl
== olddecl
)
950 if (TREE_CODE (newdecl
) != TREE_CODE (olddecl
))
951 /* If the two DECLs are not even the same kind of thing, we're not
952 interested in their types. */
955 gcc_assert (DECL_P (newdecl
));
957 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
959 tree f1
= TREE_TYPE (newdecl
);
960 tree f2
= TREE_TYPE (olddecl
);
961 tree p1
= TYPE_ARG_TYPES (f1
);
962 tree p2
= TYPE_ARG_TYPES (f2
);
964 /* Specializations of different templates are different functions
965 even if they have the same type. */
966 tree t1
= (DECL_USE_TEMPLATE (newdecl
)
967 ? DECL_TI_TEMPLATE (newdecl
)
969 tree t2
= (DECL_USE_TEMPLATE (olddecl
)
970 ? DECL_TI_TEMPLATE (olddecl
)
975 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
976 && ! (DECL_EXTERN_C_P (newdecl
)
977 && DECL_EXTERN_C_P (olddecl
)))
980 #ifdef NO_IMPLICIT_EXTERN_C
981 /* A new declaration doesn't match a built-in one unless it
982 is also extern "C". */
983 if (DECL_IS_BUILTIN (olddecl
)
984 && DECL_EXTERN_C_P (olddecl
) && !DECL_EXTERN_C_P (newdecl
))
988 if (TREE_CODE (f1
) != TREE_CODE (f2
))
991 if (same_type_p (TREE_TYPE (f1
), TREE_TYPE (f2
)))
993 if (!prototype_p (f2
) && DECL_EXTERN_C_P (olddecl
)
994 && (DECL_BUILT_IN (olddecl
)
995 #ifndef NO_IMPLICIT_EXTERN_C
996 || (DECL_IN_SYSTEM_HEADER (newdecl
) && !DECL_CLASS_SCOPE_P (newdecl
))
997 || (DECL_IN_SYSTEM_HEADER (olddecl
) && !DECL_CLASS_SCOPE_P (olddecl
))
1001 types_match
= self_promoting_args_p (p1
);
1002 if (p1
== void_list_node
)
1003 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1005 #ifndef NO_IMPLICIT_EXTERN_C
1006 else if (!prototype_p (f1
)
1007 && (DECL_EXTERN_C_P (olddecl
)
1008 && DECL_IN_SYSTEM_HEADER (olddecl
)
1009 && !DECL_CLASS_SCOPE_P (olddecl
))
1010 && (DECL_EXTERN_C_P (newdecl
)
1011 && DECL_IN_SYSTEM_HEADER (newdecl
)
1012 && !DECL_CLASS_SCOPE_P (newdecl
)))
1014 types_match
= self_promoting_args_p (p2
);
1015 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
);
1021 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl
)) == NULL_TREE
1022 || comp_type_attributes (TREE_TYPE (newdecl
),
1023 TREE_TYPE (olddecl
)) != 0);
1028 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1030 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
))
1031 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)))
1034 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1035 DECL_TEMPLATE_PARMS (olddecl
)))
1038 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1039 types_match
= same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
)),
1040 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
)));
1042 types_match
= decls_match (DECL_TEMPLATE_RESULT (olddecl
),
1043 DECL_TEMPLATE_RESULT (newdecl
));
1047 /* Need to check scope for variable declaration (VAR_DECL).
1048 For typedef (TYPE_DECL), scope is ignored. */
1049 if (TREE_CODE (newdecl
) == VAR_DECL
1050 && CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
)
1052 Two declarations for an object with C language linkage
1053 with the same name (ignoring the namespace that qualify
1054 it) that appear in different namespace scopes refer to
1056 && !(DECL_EXTERN_C_P (olddecl
) && DECL_EXTERN_C_P (newdecl
)))
1059 if (TREE_TYPE (newdecl
) == error_mark_node
)
1060 types_match
= TREE_TYPE (olddecl
) == error_mark_node
;
1061 else if (TREE_TYPE (olddecl
) == NULL_TREE
)
1062 types_match
= TREE_TYPE (newdecl
) == NULL_TREE
;
1063 else if (TREE_TYPE (newdecl
) == NULL_TREE
)
1066 types_match
= comptypes (TREE_TYPE (newdecl
),
1067 TREE_TYPE (olddecl
),
1068 COMPARE_REDECLARATION
);
1074 /* If NEWDECL is `static' and an `extern' was seen previously,
1075 warn about it. OLDDECL is the previous declaration.
1077 Note that this does not apply to the C++ case of declaring
1078 a variable `extern const' and then later `const'.
1080 Don't complain about built-in functions, since they are beyond
1081 the user's control. */
1084 warn_extern_redeclared_static (tree newdecl
, tree olddecl
)
1086 if (TREE_CODE (newdecl
) == TYPE_DECL
1087 || TREE_CODE (newdecl
) == TEMPLATE_DECL
1088 || TREE_CODE (newdecl
) == CONST_DECL
1089 || TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1092 /* Don't get confused by static member functions; that's a different
1094 if (TREE_CODE (newdecl
) == FUNCTION_DECL
1095 && DECL_STATIC_FUNCTION_P (newdecl
))
1098 /* If the old declaration was `static', or the new one isn't, then
1099 everything is OK. */
1100 if (DECL_THIS_STATIC (olddecl
) || !DECL_THIS_STATIC (newdecl
))
1103 /* It's OK to declare a builtin function as `static'. */
1104 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1105 && DECL_ARTIFICIAL (olddecl
))
1108 permerror (input_location
, "%qD was declared %<extern%> and later %<static%>", newdecl
);
1109 permerror (input_location
, "previous declaration of %q+D", olddecl
);
1112 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1113 function templates. If their exception specifications do not
1114 match, issue a diagnostic. */
1117 check_redeclaration_exception_specification (tree new_decl
,
1122 tree new_exceptions
;
1123 tree old_exceptions
;
1125 new_type
= TREE_TYPE (new_decl
);
1126 new_exceptions
= TYPE_RAISES_EXCEPTIONS (new_type
);
1127 old_type
= TREE_TYPE (old_decl
);
1128 old_exceptions
= TYPE_RAISES_EXCEPTIONS (old_type
);
1132 If any declaration of a function has an exception-specification,
1133 all declarations, including the definition and an explicit
1134 specialization, of that function shall have an
1135 exception-specification with the same set of type-ids. */
1136 if ((pedantic
|| ! DECL_IN_SYSTEM_HEADER (old_decl
))
1137 && ! DECL_IS_BUILTIN (old_decl
)
1139 && !comp_except_specs (new_exceptions
, old_exceptions
, ce_normal
))
1141 error ("declaration of %qF has a different exception specifier",
1143 error ("from previous declaration %q+F", old_decl
);
1147 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1148 Otherwise issue diagnostics. */
1151 validate_constexpr_redeclaration (tree old_decl
, tree new_decl
)
1153 old_decl
= STRIP_TEMPLATE (old_decl
);
1154 new_decl
= STRIP_TEMPLATE (new_decl
);
1155 if (!VAR_OR_FUNCTION_DECL_P (old_decl
)
1156 || !VAR_OR_FUNCTION_DECL_P (new_decl
))
1158 if (DECL_DECLARED_CONSTEXPR_P (old_decl
)
1159 == DECL_DECLARED_CONSTEXPR_P (new_decl
))
1161 if (TREE_CODE (old_decl
) == FUNCTION_DECL
&& DECL_BUILT_IN (old_decl
))
1163 /* Hide a built-in declaration. */
1164 DECL_DECLARED_CONSTEXPR_P (old_decl
)
1165 = DECL_DECLARED_CONSTEXPR_P (new_decl
);
1168 error ("redeclaration %qD differs in %<constexpr%>", new_decl
);
1169 error ("from previous declaration %q+D", old_decl
);
1173 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1174 && lookup_attribute ("gnu_inline", \
1175 DECL_ATTRIBUTES (fn)))
1177 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1178 If the redeclaration is invalid, a diagnostic is issued, and the
1179 error_mark_node is returned. Otherwise, OLDDECL is returned.
1181 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1184 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1187 duplicate_decls (tree newdecl
, tree olddecl
, bool newdecl_is_friend
)
1189 unsigned olddecl_uid
= DECL_UID (olddecl
);
1190 int olddecl_friend
= 0, types_match
= 0, hidden_friend
= 0;
1191 int new_defines_function
= 0;
1192 tree new_template_info
;
1194 if (newdecl
== olddecl
)
1197 types_match
= decls_match (newdecl
, olddecl
);
1199 /* If either the type of the new decl or the type of the old decl is an
1200 error_mark_node, then that implies that we have already issued an
1201 error (earlier) for some bogus type specification, and in that case,
1202 it is rather pointless to harass the user with yet more error message
1203 about the same declaration, so just pretend the types match here. */
1204 if (TREE_TYPE (newdecl
) == error_mark_node
1205 || TREE_TYPE (olddecl
) == error_mark_node
)
1206 return error_mark_node
;
1208 if (UDLIT_OPER_P (DECL_NAME (newdecl
))
1209 && UDLIT_OPER_P (DECL_NAME (olddecl
)))
1211 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
1212 && TREE_CODE (olddecl
) != TEMPLATE_DECL
1213 && check_raw_literal_operator (olddecl
))
1214 error ("literal operator template %q+D conflicts with"
1215 " raw literal operator %qD", newdecl
, olddecl
);
1216 else if (TREE_CODE (newdecl
) != TEMPLATE_DECL
1217 && TREE_CODE (olddecl
) == TEMPLATE_DECL
1218 && check_raw_literal_operator (newdecl
))
1219 error ("raw literal operator %q+D conflicts with"
1220 " literal operator template %qD", newdecl
, olddecl
);
1223 if (DECL_P (olddecl
)
1224 && TREE_CODE (newdecl
) == FUNCTION_DECL
1225 && TREE_CODE (olddecl
) == FUNCTION_DECL
1226 && (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
)))
1228 if (DECL_DECLARED_INLINE_P (newdecl
)
1229 && DECL_UNINLINABLE (newdecl
)
1230 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1231 /* Already warned elsewhere. */;
1232 else if (DECL_DECLARED_INLINE_P (olddecl
)
1233 && DECL_UNINLINABLE (olddecl
)
1234 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1235 /* Already warned. */;
1236 else if (DECL_DECLARED_INLINE_P (newdecl
)
1237 && DECL_UNINLINABLE (olddecl
)
1238 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl
)))
1240 warning (OPT_Wattributes
, "function %q+D redeclared as inline",
1242 warning (OPT_Wattributes
, "previous declaration of %q+D "
1243 "with attribute noinline", olddecl
);
1245 else if (DECL_DECLARED_INLINE_P (olddecl
)
1246 && DECL_UNINLINABLE (newdecl
)
1247 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl
)))
1249 warning (OPT_Wattributes
, "function %q+D redeclared with "
1250 "attribute noinline", newdecl
);
1251 warning (OPT_Wattributes
, "previous declaration of %q+D was inline",
1256 /* Check for redeclaration and other discrepancies. */
1257 if (TREE_CODE (olddecl
) == FUNCTION_DECL
1258 && DECL_ARTIFICIAL (olddecl
))
1260 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl
));
1261 if (TREE_CODE (newdecl
) != FUNCTION_DECL
)
1263 /* Avoid warnings redeclaring built-ins which have not been
1264 explicitly declared. */
1265 if (DECL_ANTICIPATED (olddecl
))
1268 /* If you declare a built-in or predefined function name as static,
1269 the old definition is overridden, but optionally warn this was a
1270 bad choice of name. */
1271 if (! TREE_PUBLIC (newdecl
))
1273 warning (OPT_Wshadow
,
1274 DECL_BUILT_IN (olddecl
)
1275 ? G_("shadowing built-in function %q#D")
1276 : G_("shadowing library function %q#D"), olddecl
);
1277 /* Discard the old built-in function. */
1280 /* If the built-in is not ansi, then programs can override
1281 it even globally without an error. */
1282 else if (! DECL_BUILT_IN (olddecl
))
1283 warning (0, "library function %q#D redeclared as non-function %q#D",
1287 error ("declaration of %q#D", newdecl
);
1288 error ("conflicts with built-in declaration %q#D",
1293 else if (!types_match
)
1295 /* Avoid warnings redeclaring built-ins which have not been
1296 explicitly declared. */
1297 if (DECL_ANTICIPATED (olddecl
))
1299 /* Deal with fileptr_type_node. FILE type is not known
1300 at the time we create the builtins. */
1303 for (t1
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1304 t2
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1306 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
))
1309 else if (TREE_VALUE (t2
) == fileptr_type_node
)
1311 tree t
= TREE_VALUE (t1
);
1313 if (TREE_CODE (t
) == POINTER_TYPE
1314 && TYPE_NAME (TREE_TYPE (t
))
1315 && DECL_NAME (TYPE_NAME (TREE_TYPE (t
)))
1316 == get_identifier ("FILE")
1317 && compparms (TREE_CHAIN (t1
), TREE_CHAIN (t2
)))
1319 tree oldargs
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1321 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))
1322 = TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1323 types_match
= decls_match (newdecl
, olddecl
);
1325 return duplicate_decls (newdecl
, olddecl
,
1327 TYPE_ARG_TYPES (TREE_TYPE (olddecl
)) = oldargs
;
1330 else if (! same_type_p (TREE_VALUE (t1
), TREE_VALUE (t2
)))
1333 else if ((DECL_EXTERN_C_P (newdecl
)
1334 && DECL_EXTERN_C_P (olddecl
))
1335 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1336 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1338 /* A near match; override the builtin. */
1340 if (TREE_PUBLIC (newdecl
))
1342 warning (0, "new declaration %q#D", newdecl
);
1343 warning (0, "ambiguates built-in declaration %q#D",
1347 warning (OPT_Wshadow
,
1348 DECL_BUILT_IN (olddecl
)
1349 ? G_("shadowing built-in function %q#D")
1350 : G_("shadowing library function %q#D"), olddecl
);
1353 /* Discard the old built-in function. */
1356 /* Replace the old RTL to avoid problems with inlining. */
1357 COPY_DECL_RTL (newdecl
, olddecl
);
1359 /* Even if the types match, prefer the new declarations type for
1360 built-ins which have not been explicitly declared, for
1361 exception lists, etc... */
1362 else if (DECL_IS_BUILTIN (olddecl
))
1364 tree type
= TREE_TYPE (newdecl
);
1365 tree attribs
= (*targetm
.merge_type_attributes
)
1366 (TREE_TYPE (olddecl
), type
);
1368 type
= cp_build_type_attribute_variant (type
, attribs
);
1369 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = type
;
1372 /* If a function is explicitly declared "throw ()", propagate that to
1373 the corresponding builtin. */
1374 if (DECL_BUILT_IN_CLASS (olddecl
) == BUILT_IN_NORMAL
1375 && DECL_ANTICIPATED (olddecl
)
1376 && TREE_NOTHROW (newdecl
)
1377 && !TREE_NOTHROW (olddecl
))
1379 enum built_in_function fncode
= DECL_FUNCTION_CODE (olddecl
);
1380 tree tmpdecl
= builtin_decl_explicit (fncode
);
1381 if (tmpdecl
&& tmpdecl
!= olddecl
&& types_match
)
1382 TREE_NOTHROW (tmpdecl
) = 1;
1385 /* Whether or not the builtin can throw exceptions has no
1386 bearing on this declarator. */
1387 TREE_NOTHROW (olddecl
) = 0;
1389 if (DECL_THIS_STATIC (newdecl
) && !DECL_THIS_STATIC (olddecl
))
1391 /* If a builtin function is redeclared as `static', merge
1392 the declarations, but make the original one static. */
1393 DECL_THIS_STATIC (olddecl
) = 1;
1394 TREE_PUBLIC (olddecl
) = 0;
1396 /* Make the old declaration consistent with the new one so
1397 that all remnants of the builtin-ness of this function
1398 will be banished. */
1399 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
1400 COPY_DECL_RTL (newdecl
, olddecl
);
1403 else if (TREE_CODE (olddecl
) != TREE_CODE (newdecl
))
1405 /* C++ Standard, 3.3, clause 4:
1406 "[Note: a namespace name or a class template name must be unique
1407 in its declarative region (7.3.2, clause 14). ]" */
1408 if (TREE_CODE (olddecl
) != NAMESPACE_DECL
1409 && TREE_CODE (newdecl
) != NAMESPACE_DECL
1410 && (TREE_CODE (olddecl
) != TEMPLATE_DECL
1411 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) != TYPE_DECL
)
1412 && (TREE_CODE (newdecl
) != TEMPLATE_DECL
1413 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != TYPE_DECL
))
1415 if ((TREE_CODE (olddecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (olddecl
)
1416 && TREE_CODE (newdecl
) != TYPE_DECL
)
1417 || (TREE_CODE (newdecl
) == TYPE_DECL
&& DECL_ARTIFICIAL (newdecl
)
1418 && TREE_CODE (olddecl
) != TYPE_DECL
))
1420 /* We do nothing special here, because C++ does such nasty
1421 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1422 get shadowed, and know that if we need to find a TYPE_DECL
1423 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1424 slot of the identifier. */
1428 if ((TREE_CODE (newdecl
) == FUNCTION_DECL
1429 && DECL_FUNCTION_TEMPLATE_P (olddecl
))
1430 || (TREE_CODE (olddecl
) == FUNCTION_DECL
1431 && DECL_FUNCTION_TEMPLATE_P (newdecl
)))
1435 error ("%q#D redeclared as different kind of symbol", newdecl
);
1436 if (TREE_CODE (olddecl
) == TREE_LIST
)
1437 olddecl
= TREE_VALUE (olddecl
);
1438 error ("previous declaration of %q+#D", olddecl
);
1440 return error_mark_node
;
1442 else if (!types_match
)
1444 if (CP_DECL_CONTEXT (newdecl
) != CP_DECL_CONTEXT (olddecl
))
1445 /* These are certainly not duplicate declarations; they're
1446 from different scopes. */
1449 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1451 /* The name of a class template may not be declared to refer to
1452 any other template, class, function, object, namespace, value,
1453 or type in the same scope. */
1454 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == TYPE_DECL
1455 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
1457 error ("declaration of template %q#D", newdecl
);
1458 error ("conflicts with previous declaration %q+#D", olddecl
);
1460 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
)) == FUNCTION_DECL
1461 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == FUNCTION_DECL
1462 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl
))),
1463 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl
))))
1464 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl
),
1465 DECL_TEMPLATE_PARMS (olddecl
))
1466 /* Template functions can be disambiguated by
1468 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl
)),
1469 TREE_TYPE (TREE_TYPE (olddecl
))))
1471 error ("new declaration %q#D", newdecl
);
1472 error ("ambiguates old declaration %q+#D", olddecl
);
1476 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1478 if (DECL_EXTERN_C_P (newdecl
) && DECL_EXTERN_C_P (olddecl
))
1480 error ("declaration of C function %q#D conflicts with",
1482 error ("previous declaration %q+#D here", olddecl
);
1485 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl
)),
1486 TYPE_ARG_TYPES (TREE_TYPE (olddecl
))))
1488 error ("new declaration %q#D", newdecl
);
1489 error ("ambiguates old declaration %q+#D", olddecl
);
1490 return error_mark_node
;
1497 error ("conflicting declaration %q#D", newdecl
);
1498 error ("%q+D has a previous declaration as %q#D", olddecl
, olddecl
);
1499 return error_mark_node
;
1502 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1503 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl
)
1504 && (!DECL_TEMPLATE_INFO (newdecl
)
1505 || (DECL_TI_TEMPLATE (newdecl
)
1506 != DECL_TI_TEMPLATE (olddecl
))))
1507 || (DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1508 && (!DECL_TEMPLATE_INFO (olddecl
)
1509 || (DECL_TI_TEMPLATE (olddecl
)
1510 != DECL_TI_TEMPLATE (newdecl
))))))
1511 /* It's OK to have a template specialization and a non-template
1512 with the same type, or to have specializations of two
1513 different templates with the same type. Note that if one is a
1514 specialization, and the other is an instantiation of the same
1515 template, that we do not exit at this point. That situation
1516 can occur if we instantiate a template class, and then
1517 specialize one of its methods. This situation is valid, but
1518 the declarations must be merged in the usual way. */
1520 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
1521 && ((DECL_TEMPLATE_INSTANTIATION (olddecl
)
1522 && !DECL_USE_TEMPLATE (newdecl
))
1523 || (DECL_TEMPLATE_INSTANTIATION (newdecl
)
1524 && !DECL_USE_TEMPLATE (olddecl
))))
1525 /* One of the declarations is a template instantiation, and the
1526 other is not a template at all. That's OK. */
1528 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
1530 /* In [namespace.alias] we have:
1532 In a declarative region, a namespace-alias-definition can be
1533 used to redefine a namespace-alias declared in that declarative
1534 region to refer only to the namespace to which it already
1537 Therefore, if we encounter a second alias directive for the same
1538 alias, we can just ignore the second directive. */
1539 if (DECL_NAMESPACE_ALIAS (newdecl
)
1540 && (DECL_NAMESPACE_ALIAS (newdecl
)
1541 == DECL_NAMESPACE_ALIAS (olddecl
)))
1543 /* [namespace.alias]
1545 A namespace-name or namespace-alias shall not be declared as
1546 the name of any other entity in the same declarative region.
1547 A namespace-name defined at global scope shall not be
1548 declared as the name of any other entity in any global scope
1550 error ("declaration of namespace %qD conflicts with", newdecl
);
1551 error ("previous declaration of namespace %q+D here", olddecl
);
1552 return error_mark_node
;
1556 const char *errmsg
= redeclaration_error_message (newdecl
, olddecl
);
1559 error_at (DECL_SOURCE_LOCATION (newdecl
), errmsg
, newdecl
);
1560 if (DECL_NAME (olddecl
) != NULL_TREE
)
1561 error ((DECL_INITIAL (olddecl
) && namespace_bindings_p ())
1562 ? G_("%q+#D previously defined here")
1563 : G_("%q+#D previously declared here"), olddecl
);
1564 return error_mark_node
;
1566 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
1567 && DECL_INITIAL (olddecl
) != NULL_TREE
1568 && !prototype_p (TREE_TYPE (olddecl
))
1569 && prototype_p (TREE_TYPE (newdecl
)))
1571 /* Prototype decl follows defn w/o prototype. */
1572 warning_at (input_location
, 0, "prototype for %q+#D", newdecl
);
1573 warning_at (DECL_SOURCE_LOCATION (olddecl
), 0,
1574 "follows non-prototype definition here");
1576 else if ((TREE_CODE (olddecl
) == FUNCTION_DECL
1577 || TREE_CODE (olddecl
) == VAR_DECL
)
1578 && DECL_LANGUAGE (newdecl
) != DECL_LANGUAGE (olddecl
))
1581 If two declarations of the same function or object
1582 specify different linkage-specifications ..., the program
1583 is ill-formed.... Except for functions with C++ linkage,
1584 a function declaration without a linkage specification
1585 shall not precede the first linkage specification for
1586 that function. A function can be declared without a
1587 linkage specification after an explicit linkage
1588 specification has been seen; the linkage explicitly
1589 specified in the earlier declaration is not affected by
1590 such a function declaration.
1592 DR 563 raises the question why the restrictions on
1593 functions should not also apply to objects. Older
1594 versions of G++ silently ignore the linkage-specification
1602 which is clearly wrong. Therefore, we now treat objects
1604 if (current_lang_depth () == 0)
1606 /* There is no explicit linkage-specification, so we use
1607 the linkage from the previous declaration. */
1608 if (!DECL_LANG_SPECIFIC (newdecl
))
1609 retrofit_lang_decl (newdecl
);
1610 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
1614 error ("previous declaration of %q+#D with %qL linkage",
1615 olddecl
, DECL_LANGUAGE (olddecl
));
1616 error ("conflicts with new declaration with %qL linkage",
1617 DECL_LANGUAGE (newdecl
));
1621 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_USE_TEMPLATE (olddecl
))
1623 else if (TREE_CODE (olddecl
) == FUNCTION_DECL
)
1625 tree t1
= TYPE_ARG_TYPES (TREE_TYPE (olddecl
));
1626 tree t2
= TYPE_ARG_TYPES (TREE_TYPE (newdecl
));
1629 if (TREE_CODE (TREE_TYPE (newdecl
)) == METHOD_TYPE
)
1630 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
);
1632 for (; t1
&& t1
!= void_list_node
;
1633 t1
= TREE_CHAIN (t1
), t2
= TREE_CHAIN (t2
), i
++)
1634 if (TREE_PURPOSE (t1
) && TREE_PURPOSE (t2
))
1636 if (1 == simple_cst_equal (TREE_PURPOSE (t1
),
1639 permerror (input_location
, "default argument given for parameter %d of %q#D",
1641 permerror (input_location
, "after previous specification in %q+#D", olddecl
);
1645 error ("default argument given for parameter %d of %q#D",
1647 error ("after previous specification in %q+#D",
1654 /* Do not merge an implicit typedef with an explicit one. In:
1658 typedef class A A __attribute__ ((foo));
1660 the attribute should apply only to the typedef. */
1661 if (TREE_CODE (olddecl
) == TYPE_DECL
1662 && (DECL_IMPLICIT_TYPEDEF_P (olddecl
)
1663 || DECL_IMPLICIT_TYPEDEF_P (newdecl
)))
1666 /* If new decl is `static' and an `extern' was seen previously,
1668 warn_extern_redeclared_static (newdecl
, olddecl
);
1670 if (!validate_constexpr_redeclaration (olddecl
, newdecl
))
1671 return error_mark_node
;
1673 /* We have committed to returning 1 at this point. */
1674 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1676 /* Now that functions must hold information normally held
1677 by field decls, there is extra work to do so that
1678 declaration information does not get destroyed during
1680 if (DECL_VINDEX (olddecl
))
1681 DECL_VINDEX (newdecl
) = DECL_VINDEX (olddecl
);
1682 if (DECL_CONTEXT (olddecl
))
1683 DECL_CONTEXT (newdecl
) = DECL_CONTEXT (olddecl
);
1684 DECL_STATIC_CONSTRUCTOR (newdecl
) |= DECL_STATIC_CONSTRUCTOR (olddecl
);
1685 DECL_STATIC_DESTRUCTOR (newdecl
) |= DECL_STATIC_DESTRUCTOR (olddecl
);
1686 DECL_PURE_VIRTUAL_P (newdecl
) |= DECL_PURE_VIRTUAL_P (olddecl
);
1687 DECL_VIRTUAL_P (newdecl
) |= DECL_VIRTUAL_P (olddecl
);
1688 DECL_INVALID_OVERRIDER_P (newdecl
) |= DECL_INVALID_OVERRIDER_P (olddecl
);
1689 DECL_THIS_STATIC (newdecl
) |= DECL_THIS_STATIC (olddecl
);
1690 if (DECL_OVERLOADED_OPERATOR_P (olddecl
) != ERROR_MARK
)
1691 SET_OVERLOADED_OPERATOR_CODE
1692 (newdecl
, DECL_OVERLOADED_OPERATOR_P (olddecl
));
1693 new_defines_function
= DECL_INITIAL (newdecl
) != NULL_TREE
;
1695 /* Optionally warn about more than one declaration for the same
1696 name, but don't warn about a function declaration followed by a
1698 if (warn_redundant_decls
&& ! DECL_ARTIFICIAL (olddecl
)
1699 && !(new_defines_function
&& DECL_INITIAL (olddecl
) == NULL_TREE
)
1700 /* Don't warn about extern decl followed by definition. */
1701 && !(DECL_EXTERNAL (olddecl
) && ! DECL_EXTERNAL (newdecl
))
1702 /* Don't warn about friends, let add_friend take care of it. */
1703 && ! (newdecl_is_friend
|| DECL_FRIEND_P (olddecl
))
1704 /* Don't warn about declaration followed by specialization. */
1705 && (! DECL_TEMPLATE_SPECIALIZATION (newdecl
)
1706 || DECL_TEMPLATE_SPECIALIZATION (olddecl
)))
1708 warning (OPT_Wredundant_decls
, "redundant redeclaration of %qD in same scope", newdecl
);
1709 warning (OPT_Wredundant_decls
, "previous declaration of %q+D", olddecl
);
1712 if (DECL_DELETED_FN (newdecl
))
1714 error ("deleted definition of %qD", newdecl
);
1715 error ("after previous declaration %q+D", olddecl
);
1717 DECL_DELETED_FN (newdecl
) |= DECL_DELETED_FN (olddecl
);
1720 /* Deal with C++: must preserve virtual function table size. */
1721 if (TREE_CODE (olddecl
) == TYPE_DECL
)
1723 tree newtype
= TREE_TYPE (newdecl
);
1724 tree oldtype
= TREE_TYPE (olddecl
);
1726 if (newtype
!= error_mark_node
&& oldtype
!= error_mark_node
1727 && TYPE_LANG_SPECIFIC (newtype
) && TYPE_LANG_SPECIFIC (oldtype
))
1728 CLASSTYPE_FRIEND_CLASSES (newtype
)
1729 = CLASSTYPE_FRIEND_CLASSES (oldtype
);
1731 DECL_ORIGINAL_TYPE (newdecl
) = DECL_ORIGINAL_TYPE (olddecl
);
1734 /* Copy all the DECL_... slots specified in the new decl
1735 except for any that we copy here from the old type. */
1736 DECL_ATTRIBUTES (newdecl
)
1737 = (*targetm
.merge_decl_attributes
) (olddecl
, newdecl
);
1739 if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
1743 old_result
= DECL_TEMPLATE_RESULT (olddecl
);
1744 new_result
= DECL_TEMPLATE_RESULT (newdecl
);
1745 TREE_TYPE (olddecl
) = TREE_TYPE (old_result
);
1746 DECL_TEMPLATE_SPECIALIZATIONS (olddecl
)
1747 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl
),
1748 DECL_TEMPLATE_SPECIALIZATIONS (newdecl
));
1750 DECL_ATTRIBUTES (old_result
)
1751 = (*targetm
.merge_decl_attributes
) (old_result
, new_result
);
1753 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1755 if (GNU_INLINE_P (old_result
) != GNU_INLINE_P (new_result
)
1756 && DECL_INITIAL (new_result
))
1758 if (DECL_INITIAL (old_result
))
1759 DECL_UNINLINABLE (old_result
) = 1;
1761 DECL_UNINLINABLE (old_result
) = DECL_UNINLINABLE (new_result
);
1762 DECL_EXTERNAL (old_result
) = DECL_EXTERNAL (new_result
);
1763 DECL_NOT_REALLY_EXTERN (old_result
)
1764 = DECL_NOT_REALLY_EXTERN (new_result
);
1765 DECL_INTERFACE_KNOWN (old_result
)
1766 = DECL_INTERFACE_KNOWN (new_result
);
1767 DECL_DECLARED_INLINE_P (old_result
)
1768 = DECL_DECLARED_INLINE_P (new_result
);
1769 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1770 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1775 DECL_DECLARED_INLINE_P (old_result
)
1776 |= DECL_DECLARED_INLINE_P (new_result
);
1777 DECL_DISREGARD_INLINE_LIMITS (old_result
)
1778 |= DECL_DISREGARD_INLINE_LIMITS (new_result
);
1779 check_redeclaration_exception_specification (newdecl
, olddecl
);
1783 /* If the new declaration is a definition, update the file and
1784 line information on the declaration, and also make
1785 the old declaration the same definition. */
1786 if (DECL_INITIAL (new_result
) != NULL_TREE
)
1788 DECL_SOURCE_LOCATION (olddecl
)
1789 = DECL_SOURCE_LOCATION (old_result
)
1790 = DECL_SOURCE_LOCATION (newdecl
);
1791 DECL_INITIAL (old_result
) = DECL_INITIAL (new_result
);
1792 if (DECL_FUNCTION_TEMPLATE_P (newdecl
))
1795 DECL_ARGUMENTS (old_result
)
1796 = DECL_ARGUMENTS (new_result
);
1797 for (parm
= DECL_ARGUMENTS (old_result
); parm
;
1798 parm
= DECL_CHAIN (parm
))
1799 DECL_CONTEXT (parm
) = old_result
;
1808 /* Automatically handles default parameters. */
1809 tree oldtype
= TREE_TYPE (olddecl
);
1812 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1813 maybe_instantiate_noexcept (olddecl
);
1815 /* Merge the data types specified in the two decls. */
1816 newtype
= merge_types (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
));
1818 /* If merge_types produces a non-typedef type, just use the old type. */
1819 if (TREE_CODE (newdecl
) == TYPE_DECL
1820 && newtype
== DECL_ORIGINAL_TYPE (newdecl
))
1823 if (TREE_CODE (newdecl
) == VAR_DECL
)
1825 DECL_THIS_EXTERN (newdecl
) |= DECL_THIS_EXTERN (olddecl
);
1826 DECL_INITIALIZED_P (newdecl
) |= DECL_INITIALIZED_P (olddecl
);
1827 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl
)
1828 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl
);
1829 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl
)
1830 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl
);
1832 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1833 if (DECL_LANG_SPECIFIC (olddecl
)
1834 && CP_DECL_THREADPRIVATE_P (olddecl
))
1836 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1837 if (!DECL_LANG_SPECIFIC (newdecl
))
1838 retrofit_lang_decl (newdecl
);
1840 DECL_TLS_MODEL (newdecl
) = DECL_TLS_MODEL (olddecl
);
1841 CP_DECL_THREADPRIVATE_P (newdecl
) = 1;
1845 /* Do this after calling `merge_types' so that default
1846 parameters don't confuse us. */
1847 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1848 check_redeclaration_exception_specification (newdecl
, olddecl
);
1849 TREE_TYPE (newdecl
) = TREE_TYPE (olddecl
) = newtype
;
1851 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1852 check_default_args (newdecl
);
1854 /* Lay the type out, unless already done. */
1855 if (! same_type_p (newtype
, oldtype
)
1856 && TREE_TYPE (newdecl
) != error_mark_node
1857 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1858 layout_type (TREE_TYPE (newdecl
));
1860 if ((TREE_CODE (newdecl
) == VAR_DECL
1861 || TREE_CODE (newdecl
) == PARM_DECL
1862 || TREE_CODE (newdecl
) == RESULT_DECL
1863 || TREE_CODE (newdecl
) == FIELD_DECL
1864 || TREE_CODE (newdecl
) == TYPE_DECL
)
1865 && !(processing_template_decl
&& uses_template_parms (newdecl
)))
1866 layout_decl (newdecl
, 0);
1868 /* Merge the type qualifiers. */
1869 if (TREE_READONLY (newdecl
))
1870 TREE_READONLY (olddecl
) = 1;
1871 if (TREE_THIS_VOLATILE (newdecl
))
1872 TREE_THIS_VOLATILE (olddecl
) = 1;
1873 if (TREE_NOTHROW (newdecl
))
1874 TREE_NOTHROW (olddecl
) = 1;
1876 /* Merge deprecatedness. */
1877 if (TREE_DEPRECATED (newdecl
))
1878 TREE_DEPRECATED (olddecl
) = 1;
1880 /* Preserve function specific target and optimization options */
1881 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1883 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl
)
1884 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl
))
1885 DECL_FUNCTION_SPECIFIC_TARGET (newdecl
)
1886 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl
);
1888 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
)
1889 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
))
1890 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl
)
1891 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl
);
1894 /* Merge the initialization information. */
1895 if (DECL_INITIAL (newdecl
) == NULL_TREE
1896 && DECL_INITIAL (olddecl
) != NULL_TREE
)
1898 DECL_INITIAL (newdecl
) = DECL_INITIAL (olddecl
);
1899 DECL_SOURCE_LOCATION (newdecl
) = DECL_SOURCE_LOCATION (olddecl
);
1900 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1902 DECL_SAVED_TREE (newdecl
) = DECL_SAVED_TREE (olddecl
);
1903 DECL_STRUCT_FUNCTION (newdecl
) = DECL_STRUCT_FUNCTION (olddecl
);
1907 /* Merge the section attribute.
1908 We want to issue an error if the sections conflict but that must be
1909 done later in decl_attributes since we are called before attributes
1911 if (DECL_SECTION_NAME (newdecl
) == NULL_TREE
)
1912 DECL_SECTION_NAME (newdecl
) = DECL_SECTION_NAME (olddecl
);
1914 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
1916 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl
)
1917 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl
);
1918 DECL_NO_LIMIT_STACK (newdecl
) |= DECL_NO_LIMIT_STACK (olddecl
);
1919 TREE_THIS_VOLATILE (newdecl
) |= TREE_THIS_VOLATILE (olddecl
);
1920 TREE_NOTHROW (newdecl
) |= TREE_NOTHROW (olddecl
);
1921 DECL_IS_MALLOC (newdecl
) |= DECL_IS_MALLOC (olddecl
);
1922 DECL_IS_OPERATOR_NEW (newdecl
) |= DECL_IS_OPERATOR_NEW (olddecl
);
1923 DECL_PURE_P (newdecl
) |= DECL_PURE_P (olddecl
);
1924 TREE_READONLY (newdecl
) |= TREE_READONLY (olddecl
);
1925 DECL_LOOPING_CONST_OR_PURE_P (newdecl
)
1926 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl
);
1927 /* Keep the old RTL. */
1928 COPY_DECL_RTL (olddecl
, newdecl
);
1930 else if (TREE_CODE (newdecl
) == VAR_DECL
1931 && (DECL_SIZE (olddecl
) || !DECL_SIZE (newdecl
)))
1933 /* Keep the old RTL. We cannot keep the old RTL if the old
1934 declaration was for an incomplete object and the new
1935 declaration is not since many attributes of the RTL will
1937 COPY_DECL_RTL (olddecl
, newdecl
);
1940 /* If cannot merge, then use the new type and qualifiers,
1941 and don't preserve the old rtl. */
1944 /* Clean out any memory we had of the old declaration. */
1945 tree oldstatic
= value_member (olddecl
, static_aggregates
);
1947 TREE_VALUE (oldstatic
) = error_mark_node
;
1949 TREE_TYPE (olddecl
) = TREE_TYPE (newdecl
);
1950 TREE_READONLY (olddecl
) = TREE_READONLY (newdecl
);
1951 TREE_THIS_VOLATILE (olddecl
) = TREE_THIS_VOLATILE (newdecl
);
1952 TREE_SIDE_EFFECTS (olddecl
) = TREE_SIDE_EFFECTS (newdecl
);
1955 /* Merge the storage class information. */
1956 merge_weak (newdecl
, olddecl
);
1958 if (DECL_ONE_ONLY (olddecl
))
1959 DECL_COMDAT_GROUP (newdecl
) = DECL_COMDAT_GROUP (olddecl
);
1961 DECL_DEFER_OUTPUT (newdecl
) |= DECL_DEFER_OUTPUT (olddecl
);
1962 TREE_PUBLIC (newdecl
) = TREE_PUBLIC (olddecl
);
1963 TREE_STATIC (olddecl
) = TREE_STATIC (newdecl
) |= TREE_STATIC (olddecl
);
1964 if (! DECL_EXTERNAL (olddecl
))
1965 DECL_EXTERNAL (newdecl
) = 0;
1967 new_template_info
= NULL_TREE
;
1968 if (DECL_LANG_SPECIFIC (newdecl
) && DECL_LANG_SPECIFIC (olddecl
))
1970 bool new_redefines_gnu_inline
= false;
1972 if (new_defines_function
1973 && ((DECL_INTERFACE_KNOWN (olddecl
)
1974 && TREE_CODE (olddecl
) == FUNCTION_DECL
)
1975 || (TREE_CODE (olddecl
) == TEMPLATE_DECL
1976 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl
))
1977 == FUNCTION_DECL
))))
1981 if (TREE_CODE (fn
) == TEMPLATE_DECL
)
1982 fn
= DECL_TEMPLATE_RESULT (olddecl
);
1984 new_redefines_gnu_inline
= GNU_INLINE_P (fn
) && DECL_INITIAL (fn
);
1987 if (!new_redefines_gnu_inline
)
1989 DECL_INTERFACE_KNOWN (newdecl
) |= DECL_INTERFACE_KNOWN (olddecl
);
1990 DECL_NOT_REALLY_EXTERN (newdecl
) |= DECL_NOT_REALLY_EXTERN (olddecl
);
1991 DECL_COMDAT (newdecl
) |= DECL_COMDAT (olddecl
);
1993 DECL_TEMPLATE_INSTANTIATED (newdecl
)
1994 |= DECL_TEMPLATE_INSTANTIATED (olddecl
);
1995 DECL_ODR_USED (newdecl
) |= DECL_ODR_USED (olddecl
);
1997 /* If the OLDDECL is an instantiation and/or specialization,
1998 then the NEWDECL must be too. But, it may not yet be marked
1999 as such if the caller has created NEWDECL, but has not yet
2000 figured out that it is a redeclaration. */
2001 if (!DECL_USE_TEMPLATE (newdecl
))
2002 DECL_USE_TEMPLATE (newdecl
) = DECL_USE_TEMPLATE (olddecl
);
2004 /* Don't really know how much of the language-specific
2005 values we should copy from old to new. */
2006 DECL_IN_AGGR_P (newdecl
) = DECL_IN_AGGR_P (olddecl
);
2007 DECL_REPO_AVAILABLE_P (newdecl
) = DECL_REPO_AVAILABLE_P (olddecl
);
2008 DECL_INITIALIZED_IN_CLASS_P (newdecl
)
2009 |= DECL_INITIALIZED_IN_CLASS_P (olddecl
);
2011 if (LANG_DECL_HAS_MIN (newdecl
))
2013 DECL_LANG_SPECIFIC (newdecl
)->u
.min
.u2
=
2014 DECL_LANG_SPECIFIC (olddecl
)->u
.min
.u2
;
2015 if (DECL_TEMPLATE_INFO (newdecl
))
2016 new_template_info
= DECL_TEMPLATE_INFO (newdecl
);
2017 DECL_TEMPLATE_INFO (newdecl
) = DECL_TEMPLATE_INFO (olddecl
);
2019 /* Only functions have these fields. */
2020 if (TREE_CODE (newdecl
) == FUNCTION_DECL
2021 || DECL_FUNCTION_TEMPLATE_P (newdecl
))
2023 DECL_NONCONVERTING_P (newdecl
) = DECL_NONCONVERTING_P (olddecl
);
2024 olddecl_friend
= DECL_FRIEND_P (olddecl
);
2025 hidden_friend
= (DECL_ANTICIPATED (olddecl
)
2026 && DECL_HIDDEN_FRIEND_P (olddecl
)
2027 && newdecl_is_friend
);
2028 DECL_BEFRIENDING_CLASSES (newdecl
)
2029 = chainon (DECL_BEFRIENDING_CLASSES (newdecl
),
2030 DECL_BEFRIENDING_CLASSES (olddecl
));
2031 /* DECL_THUNKS is only valid for virtual functions,
2032 otherwise it is a DECL_FRIEND_CONTEXT. */
2033 if (DECL_VIRTUAL_P (newdecl
))
2034 DECL_THUNKS (newdecl
) = DECL_THUNKS (olddecl
);
2036 /* Only variables have this field. */
2037 else if (TREE_CODE (newdecl
) == VAR_DECL
2038 && VAR_HAD_UNKNOWN_BOUND (olddecl
))
2039 SET_VAR_HAD_UNKNOWN_BOUND (newdecl
);
2042 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2046 /* Merge parameter attributes. */
2047 tree oldarg
, newarg
;
2048 for (oldarg
= DECL_ARGUMENTS(olddecl
),
2049 newarg
= DECL_ARGUMENTS(newdecl
);
2051 oldarg
= DECL_CHAIN(oldarg
), newarg
= DECL_CHAIN(newarg
)) {
2052 DECL_ATTRIBUTES (newarg
)
2053 = (*targetm
.merge_decl_attributes
) (oldarg
, newarg
);
2054 DECL_ATTRIBUTES (oldarg
) = DECL_ATTRIBUTES (newarg
);
2057 if (DECL_TEMPLATE_INSTANTIATION (olddecl
)
2058 && !DECL_TEMPLATE_INSTANTIATION (newdecl
))
2060 /* If newdecl is not a specialization, then it is not a
2061 template-related function at all. And that means that we
2062 should have exited above, returning 0. */
2063 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl
));
2065 if (DECL_ODR_USED (olddecl
))
2066 /* From [temp.expl.spec]:
2068 If a template, a member template or the member of a class
2069 template is explicitly specialized then that
2070 specialization shall be declared before the first use of
2071 that specialization that would cause an implicit
2072 instantiation to take place, in every translation unit in
2073 which such a use occurs. */
2074 error ("explicit specialization of %qD after first use",
2077 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl
);
2079 /* Don't propagate visibility from the template to the
2080 specialization here. We'll do that in determine_visibility if
2082 DECL_VISIBILITY_SPECIFIED (olddecl
) = 0;
2084 /* [temp.expl.spec/14] We don't inline explicit specialization
2085 just because the primary template says so. */
2087 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2088 the always_inline attribute. */
2089 if (DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2090 && !DECL_DISREGARD_INLINE_LIMITS (newdecl
))
2092 if (DECL_DECLARED_INLINE_P (newdecl
))
2093 DECL_DISREGARD_INLINE_LIMITS (newdecl
) = true;
2095 DECL_ATTRIBUTES (newdecl
)
2096 = remove_attribute ("always_inline",
2097 DECL_ATTRIBUTES (newdecl
));
2100 else if (new_defines_function
&& DECL_INITIAL (olddecl
))
2102 /* Never inline re-defined extern inline functions.
2103 FIXME: this could be better handled by keeping both
2104 function as separate declarations. */
2105 DECL_UNINLINABLE (newdecl
) = 1;
2109 if (DECL_PENDING_INLINE_INFO (newdecl
) == 0)
2110 DECL_PENDING_INLINE_INFO (newdecl
) = DECL_PENDING_INLINE_INFO (olddecl
);
2112 DECL_DECLARED_INLINE_P (newdecl
) |= DECL_DECLARED_INLINE_P (olddecl
);
2114 DECL_UNINLINABLE (newdecl
) = DECL_UNINLINABLE (olddecl
)
2115 = (DECL_UNINLINABLE (newdecl
) || DECL_UNINLINABLE (olddecl
));
2117 DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2118 = DECL_DISREGARD_INLINE_LIMITS (olddecl
)
2119 = (DECL_DISREGARD_INLINE_LIMITS (newdecl
)
2120 || DECL_DISREGARD_INLINE_LIMITS (olddecl
));
2123 /* Preserve abstractness on cloned [cd]tors. */
2124 DECL_ABSTRACT (newdecl
) = DECL_ABSTRACT (olddecl
);
2126 /* Update newdecl's parms to point at olddecl. */
2127 for (parm
= DECL_ARGUMENTS (newdecl
); parm
;
2128 parm
= DECL_CHAIN (parm
))
2129 DECL_CONTEXT (parm
) = olddecl
;
2133 SET_DECL_LANGUAGE (olddecl
, DECL_LANGUAGE (newdecl
));
2134 COPY_DECL_ASSEMBLER_NAME (newdecl
, olddecl
);
2135 COPY_DECL_RTL (newdecl
, olddecl
);
2137 if (! types_match
|| new_defines_function
)
2139 /* These need to be copied so that the names are available.
2140 Note that if the types do match, we'll preserve inline
2141 info and other bits, but if not, we won't. */
2142 DECL_ARGUMENTS (olddecl
) = DECL_ARGUMENTS (newdecl
);
2143 DECL_RESULT (olddecl
) = DECL_RESULT (newdecl
);
2145 if (new_defines_function
)
2146 /* If defining a function declared with other language
2147 linkage, use the previously declared language linkage. */
2148 SET_DECL_LANGUAGE (newdecl
, DECL_LANGUAGE (olddecl
));
2149 else if (types_match
)
2151 /* If redeclaring a builtin function, and not a definition,
2152 it stays built in. */
2153 if (DECL_BUILT_IN (olddecl
))
2155 DECL_BUILT_IN_CLASS (newdecl
) = DECL_BUILT_IN_CLASS (olddecl
);
2156 DECL_FUNCTION_CODE (newdecl
) = DECL_FUNCTION_CODE (olddecl
);
2157 /* If we're keeping the built-in definition, keep the rtl,
2158 regardless of declaration matches. */
2159 COPY_DECL_RTL (olddecl
, newdecl
);
2160 if (DECL_BUILT_IN_CLASS (newdecl
) == BUILT_IN_NORMAL
)
2162 enum built_in_function fncode
= DECL_FUNCTION_CODE (newdecl
);
2165 /* If a compatible prototype of these builtin functions
2166 is seen, assume the runtime implements it with the
2167 expected semantics. */
2168 case BUILT_IN_STPCPY
:
2169 if (builtin_decl_explicit_p (fncode
))
2170 set_builtin_decl_implicit_p (fncode
, true);
2178 DECL_RESULT (newdecl
) = DECL_RESULT (olddecl
);
2179 /* Don't clear out the arguments if we're just redeclaring a
2181 if (DECL_ARGUMENTS (olddecl
))
2182 DECL_ARGUMENTS (newdecl
) = DECL_ARGUMENTS (olddecl
);
2185 else if (TREE_CODE (newdecl
) == NAMESPACE_DECL
)
2186 NAMESPACE_LEVEL (newdecl
) = NAMESPACE_LEVEL (olddecl
);
2188 /* Now preserve various other info from the definition. */
2189 TREE_ADDRESSABLE (newdecl
) = TREE_ADDRESSABLE (olddecl
);
2190 TREE_ASM_WRITTEN (newdecl
) = TREE_ASM_WRITTEN (olddecl
);
2191 DECL_COMMON (newdecl
) = DECL_COMMON (olddecl
);
2192 COPY_DECL_ASSEMBLER_NAME (olddecl
, newdecl
);
2194 /* Warn about conflicting visibility specifications. */
2195 if (DECL_VISIBILITY_SPECIFIED (olddecl
)
2196 && DECL_VISIBILITY_SPECIFIED (newdecl
)
2197 && DECL_VISIBILITY (newdecl
) != DECL_VISIBILITY (olddecl
))
2199 warning_at (input_location
, OPT_Wattributes
,
2200 "%q+D: visibility attribute ignored because it", newdecl
);
2201 warning_at (DECL_SOURCE_LOCATION (olddecl
), OPT_Wattributes
,
2202 "conflicts with previous declaration here");
2204 /* Choose the declaration which specified visibility. */
2205 if (DECL_VISIBILITY_SPECIFIED (olddecl
))
2207 DECL_VISIBILITY (newdecl
) = DECL_VISIBILITY (olddecl
);
2208 DECL_VISIBILITY_SPECIFIED (newdecl
) = 1;
2210 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2211 so keep this behavior. */
2212 if (TREE_CODE (newdecl
) == VAR_DECL
&& DECL_HAS_INIT_PRIORITY_P (newdecl
))
2214 SET_DECL_INIT_PRIORITY (olddecl
, DECL_INIT_PRIORITY (newdecl
));
2215 DECL_HAS_INIT_PRIORITY_P (olddecl
) = 1;
2217 /* Likewise for DECL_ALIGN, DECL_USER_ALIGN and DECL_PACKED. */
2218 if (DECL_ALIGN (olddecl
) > DECL_ALIGN (newdecl
))
2220 DECL_ALIGN (newdecl
) = DECL_ALIGN (olddecl
);
2221 DECL_USER_ALIGN (newdecl
) |= DECL_USER_ALIGN (olddecl
);
2223 DECL_USER_ALIGN (olddecl
) = DECL_USER_ALIGN (newdecl
);
2224 if (TREE_CODE (newdecl
) == FIELD_DECL
)
2225 DECL_PACKED (olddecl
) = DECL_PACKED (newdecl
);
2227 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2228 with that from NEWDECL below. */
2229 if (DECL_LANG_SPECIFIC (olddecl
))
2231 gcc_assert (DECL_LANG_SPECIFIC (olddecl
)
2232 != DECL_LANG_SPECIFIC (newdecl
));
2233 ggc_free (DECL_LANG_SPECIFIC (olddecl
));
2236 /* Merge the USED information. */
2237 if (TREE_USED (olddecl
))
2238 TREE_USED (newdecl
) = 1;
2239 else if (TREE_USED (newdecl
))
2240 TREE_USED (olddecl
) = 1;
2241 if (TREE_CODE (newdecl
) == VAR_DECL
)
2243 if (DECL_READ_P (olddecl
))
2244 DECL_READ_P (newdecl
) = 1;
2245 else if (DECL_READ_P (newdecl
))
2246 DECL_READ_P (olddecl
) = 1;
2248 if (DECL_PRESERVE_P (olddecl
))
2249 DECL_PRESERVE_P (newdecl
) = 1;
2250 else if (DECL_PRESERVE_P (newdecl
))
2251 DECL_PRESERVE_P (olddecl
) = 1;
2253 if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2257 function_size
= sizeof (struct tree_decl_common
);
2259 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2260 (char *) newdecl
+ sizeof (struct tree_common
),
2261 function_size
- sizeof (struct tree_common
));
2263 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2264 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2265 sizeof (struct tree_function_decl
) - sizeof (struct tree_decl_common
));
2266 if (new_template_info
)
2267 /* If newdecl is a template instantiation, it is possible that
2268 the following sequence of events has occurred:
2270 o A friend function was declared in a class template. The
2271 class template was instantiated.
2273 o The instantiation of the friend declaration was
2274 recorded on the instantiation list, and is newdecl.
2276 o Later, however, instantiate_class_template called pushdecl
2277 on the newdecl to perform name injection. But, pushdecl in
2278 turn called duplicate_decls when it discovered that another
2279 declaration of a global function with the same name already
2282 o Here, in duplicate_decls, we decided to clobber newdecl.
2284 If we're going to do that, we'd better make sure that
2285 olddecl, and not newdecl, is on the list of
2286 instantiations so that if we try to do the instantiation
2287 again we won't get the clobbered declaration. */
2288 reregister_specialization (newdecl
,
2294 size_t size
= tree_code_size (TREE_CODE (olddecl
));
2295 memcpy ((char *) olddecl
+ sizeof (struct tree_common
),
2296 (char *) newdecl
+ sizeof (struct tree_common
),
2297 sizeof (struct tree_decl_common
) - sizeof (struct tree_common
));
2298 switch (TREE_CODE (olddecl
))
2308 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2309 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2310 size
- sizeof (struct tree_decl_common
)
2311 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2315 memcpy ((char *) olddecl
+ sizeof (struct tree_decl_common
),
2316 (char *) newdecl
+ sizeof (struct tree_decl_common
),
2317 sizeof (struct tree_decl_non_common
) - sizeof (struct tree_decl_common
)
2318 + TREE_CODE_LENGTH (TREE_CODE (newdecl
)) * sizeof (char *));
2322 DECL_UID (olddecl
) = olddecl_uid
;
2324 DECL_FRIEND_P (olddecl
) = 1;
2327 DECL_ANTICIPATED (olddecl
) = 1;
2328 DECL_HIDDEN_FRIEND_P (olddecl
) = 1;
2331 /* NEWDECL contains the merged attribute lists.
2332 Update OLDDECL to be the same. */
2333 DECL_ATTRIBUTES (olddecl
) = DECL_ATTRIBUTES (newdecl
);
2335 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2336 so that encode_section_info has a chance to look at the new decl
2337 flags and attributes. */
2338 if (DECL_RTL_SET_P (olddecl
)
2339 && (TREE_CODE (olddecl
) == FUNCTION_DECL
2340 || (TREE_CODE (olddecl
) == VAR_DECL
2341 && TREE_STATIC (olddecl
))))
2342 make_decl_rtl (olddecl
);
2344 /* The NEWDECL will no longer be needed. Because every out-of-class
2345 declaration of a member results in a call to duplicate_decls,
2346 freeing these nodes represents in a significant savings. */
2352 /* Return zero if the declaration NEWDECL is valid
2353 when the declaration OLDDECL (assumed to be for the same name)
2354 has already been seen.
2355 Otherwise return an error message format string with a %s
2356 where the identifier should go. */
2359 redeclaration_error_message (tree newdecl
, tree olddecl
)
2361 if (TREE_CODE (newdecl
) == TYPE_DECL
)
2363 /* Because C++ can put things into name space for free,
2364 constructs like "typedef struct foo { ... } foo"
2365 would look like an erroneous redeclaration. */
2366 if (same_type_p (TREE_TYPE (newdecl
), TREE_TYPE (olddecl
)))
2369 return G_("redefinition of %q#D");
2371 else if (TREE_CODE (newdecl
) == FUNCTION_DECL
)
2373 /* If this is a pure function, its olddecl will actually be
2374 the original initialization to `0' (which we force to call
2375 abort()). Don't complain about redefinition in this case. */
2376 if (DECL_LANG_SPECIFIC (olddecl
) && DECL_PURE_VIRTUAL_P (olddecl
)
2377 && DECL_INITIAL (olddecl
) == NULL_TREE
)
2380 /* If both functions come from different namespaces, this is not
2381 a redeclaration - this is a conflict with a used function. */
2382 if (DECL_NAMESPACE_SCOPE_P (olddecl
)
2383 && DECL_CONTEXT (olddecl
) != DECL_CONTEXT (newdecl
)
2384 && ! decls_match (olddecl
, newdecl
))
2385 return G_("%qD conflicts with used function");
2387 /* We'll complain about linkage mismatches in
2388 warn_extern_redeclared_static. */
2390 /* Defining the same name twice is no good. */
2391 if (DECL_INITIAL (olddecl
) != NULL_TREE
2392 && DECL_INITIAL (newdecl
) != NULL_TREE
)
2394 if (DECL_NAME (olddecl
) == NULL_TREE
)
2395 return G_("%q#D not declared in class");
2396 else if (!GNU_INLINE_P (olddecl
)
2397 || GNU_INLINE_P (newdecl
))
2398 return G_("redefinition of %q#D");
2401 if (DECL_DECLARED_INLINE_P (olddecl
) && DECL_DECLARED_INLINE_P (newdecl
))
2403 bool olda
= GNU_INLINE_P (olddecl
);
2404 bool newa
= GNU_INLINE_P (newdecl
);
2409 return G_("%q+D redeclared inline with "
2410 "%<gnu_inline%> attribute");
2412 return G_("%q+D redeclared inline without "
2413 "%<gnu_inline%> attribute");
2419 else if (TREE_CODE (newdecl
) == TEMPLATE_DECL
)
2423 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) == TYPE_DECL
)
2425 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl
))
2426 && COMPLETE_TYPE_P (TREE_TYPE (olddecl
)))
2427 return G_("redefinition of %q#D");
2431 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl
)) != FUNCTION_DECL
2432 || (DECL_TEMPLATE_RESULT (newdecl
)
2433 == DECL_TEMPLATE_RESULT (olddecl
)))
2436 nt
= DECL_TEMPLATE_RESULT (newdecl
);
2437 if (DECL_TEMPLATE_INFO (nt
))
2438 nt
= DECL_TEMPLATE_RESULT (template_for_substitution (nt
));
2439 ot
= DECL_TEMPLATE_RESULT (olddecl
);
2440 if (DECL_TEMPLATE_INFO (ot
))
2441 ot
= DECL_TEMPLATE_RESULT (template_for_substitution (ot
));
2442 if (DECL_INITIAL (nt
) && DECL_INITIAL (ot
)
2443 && (!GNU_INLINE_P (ot
) || GNU_INLINE_P (nt
)))
2444 return G_("redefinition of %q#D");
2446 if (DECL_DECLARED_INLINE_P (ot
) && DECL_DECLARED_INLINE_P (nt
))
2448 bool olda
= GNU_INLINE_P (ot
);
2449 bool newa
= GNU_INLINE_P (nt
);
2454 return G_("%q+D redeclared inline with "
2455 "%<gnu_inline%> attribute");
2457 return G_("%q+D redeclared inline without "
2458 "%<gnu_inline%> attribute");
2462 /* Core issue #226 (C++0x):
2464 If a friend function template declaration specifies a
2465 default template-argument, that declaration shall be a
2466 definition and shall be the only declaration of the
2467 function template in the translation unit. */
2468 if ((cxx_dialect
!= cxx98
)
2469 && TREE_CODE (ot
) == FUNCTION_DECL
&& DECL_FRIEND_P (ot
)
2470 && !check_default_tmpl_args (nt
, DECL_TEMPLATE_PARMS (newdecl
),
2471 /*is_primary=*/1, /*is_partial=*/0,
2472 /*is_friend_decl=*/2))
2473 return G_("redeclaration of friend %q#D "
2474 "may not have default template arguments");
2478 else if (TREE_CODE (newdecl
) == VAR_DECL
2479 && DECL_THREAD_LOCAL_P (newdecl
) != DECL_THREAD_LOCAL_P (olddecl
)
2480 && (! DECL_LANG_SPECIFIC (olddecl
)
2481 || ! CP_DECL_THREADPRIVATE_P (olddecl
)
2482 || DECL_THREAD_LOCAL_P (newdecl
)))
2484 /* Only variables can be thread-local, and all declarations must
2485 agree on this property. */
2486 if (DECL_THREAD_LOCAL_P (newdecl
))
2487 return G_("thread-local declaration of %q#D follows "
2488 "non-thread-local declaration");
2490 return G_("non-thread-local declaration of %q#D follows "
2491 "thread-local declaration");
2493 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl
))
2495 /* The objects have been declared at namespace scope. If either
2496 is a member of an anonymous union, then this is an invalid
2497 redeclaration. For example:
2503 if ((TREE_CODE (newdecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (newdecl
))
2504 || (TREE_CODE (olddecl
) == VAR_DECL
&& DECL_ANON_UNION_VAR_P (olddecl
)))
2505 return G_("redeclaration of %q#D");
2506 /* If at least one declaration is a reference, there is no
2507 conflict. For example:
2513 if (DECL_EXTERNAL (newdecl
) || DECL_EXTERNAL (olddecl
))
2515 /* Reject two definitions. */
2516 return G_("redefinition of %q#D");
2520 /* Objects declared with block scope: */
2521 /* Reject two definitions, and reject a definition
2522 together with an external reference. */
2523 if (!(DECL_EXTERNAL (newdecl
) && DECL_EXTERNAL (olddecl
)))
2524 return G_("redeclaration of %q#D");
2529 /* Hash and equality functions for the named_label table. */
2532 named_label_entry_hash (const void *data
)
2534 const struct named_label_entry
*ent
= (const struct named_label_entry
*) data
;
2535 return DECL_UID (ent
->label_decl
);
2539 named_label_entry_eq (const void *a
, const void *b
)
2541 const struct named_label_entry
*ent_a
= (const struct named_label_entry
*) a
;
2542 const struct named_label_entry
*ent_b
= (const struct named_label_entry
*) b
;
2543 return ent_a
->label_decl
== ent_b
->label_decl
;
2546 /* Create a new label, named ID. */
2549 make_label_decl (tree id
, int local_p
)
2551 struct named_label_entry
*ent
;
2555 decl
= build_decl (input_location
, LABEL_DECL
, id
, void_type_node
);
2557 DECL_CONTEXT (decl
) = current_function_decl
;
2558 DECL_MODE (decl
) = VOIDmode
;
2559 C_DECLARED_LABEL_FLAG (decl
) = local_p
;
2561 /* Say where one reference is to the label, for the sake of the
2562 error if it is not defined. */
2563 DECL_SOURCE_LOCATION (decl
) = input_location
;
2565 /* Record the fact that this identifier is bound to this label. */
2566 SET_IDENTIFIER_LABEL_VALUE (id
, decl
);
2568 /* Create the label htab for the function on demand. */
2570 named_labels
= htab_create_ggc (13, named_label_entry_hash
,
2571 named_label_entry_eq
, NULL
);
2573 /* Record this label on the list of labels used in this function.
2574 We do this before calling make_label_decl so that we get the
2575 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2576 ent
= ggc_alloc_cleared_named_label_entry ();
2577 ent
->label_decl
= decl
;
2579 slot
= htab_find_slot (named_labels
, ent
, INSERT
);
2580 gcc_assert (*slot
== NULL
);
2586 /* Look for a label named ID in the current function. If one cannot
2587 be found, create one. (We keep track of used, but undefined,
2588 labels, and complain about them at the end of a function.) */
2591 lookup_label_1 (tree id
)
2595 /* You can't use labels at global scope. */
2596 if (current_function_decl
== NULL_TREE
)
2598 error ("label %qE referenced outside of any function", id
);
2602 /* See if we've already got this label. */
2603 decl
= IDENTIFIER_LABEL_VALUE (id
);
2604 if (decl
!= NULL_TREE
&& DECL_CONTEXT (decl
) == current_function_decl
)
2607 decl
= make_label_decl (id
, /*local_p=*/0);
2611 /* Wrapper for lookup_label_1. */
2614 lookup_label (tree id
)
2617 bool subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
2618 ret
= lookup_label_1 (id
);
2619 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
2623 /* Declare a local label named ID. */
2626 declare_local_label (tree id
)
2629 cp_label_binding
*bind
;
2631 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2632 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2633 bind
= VEC_safe_push (cp_label_binding
, gc
,
2634 current_binding_level
->shadowed_labels
, NULL
);
2635 bind
->prev_value
= IDENTIFIER_LABEL_VALUE (id
);
2637 decl
= make_label_decl (id
, /*local_p=*/1);
2643 /* Returns nonzero if it is ill-formed to jump past the declaration of
2644 DECL. Returns 2 if it's also a real problem. */
2647 decl_jump_unsafe (tree decl
)
2649 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2650 with automatic storage duration is not in scope to a point where it is
2651 in scope is ill-formed unless the variable has scalar type, class type
2652 with a trivial default constructor and a trivial destructor, a
2653 cv-qualified version of one of these types, or an array of one of the
2654 preceding types and is declared without an initializer (8.5). */
2655 tree type
= TREE_TYPE (decl
);
2657 if (TREE_CODE (decl
) != VAR_DECL
|| TREE_STATIC (decl
)
2658 || type
== error_mark_node
)
2661 type
= strip_array_types (type
);
2663 if (type_has_nontrivial_default_init (TREE_TYPE (decl
))
2664 || DECL_NONTRIVIALLY_INITIALIZED_P (decl
))
2667 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
2673 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2676 identify_goto (tree decl
, const location_t
*locus
)
2679 permerror (input_location
, "jump to label %qD", decl
);
2681 permerror (input_location
, "jump to case label");
2683 permerror (*locus
, " from here");
2686 /* Check that a single previously seen jump to a newly defined label
2687 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2688 the jump context; NAMES are the names in scope in LEVEL at the jump
2689 context; LOCUS is the source position of the jump or 0. Returns
2690 true if all is well. */
2693 check_previous_goto_1 (tree decl
, cp_binding_level
* level
, tree names
,
2694 bool exited_omp
, const location_t
*locus
)
2696 cp_binding_level
*b
;
2697 bool identified
= false, saw_eh
= false, saw_omp
= false;
2701 identify_goto (decl
, locus
);
2702 error (" exits OpenMP structured block");
2703 identified
= saw_omp
= true;
2706 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2708 tree new_decls
, old_decls
= (b
== level
? names
: NULL_TREE
);
2710 for (new_decls
= b
->names
; new_decls
!= old_decls
;
2711 new_decls
= (DECL_P (new_decls
) ? DECL_CHAIN (new_decls
)
2712 : TREE_CHAIN (new_decls
)))
2714 int problem
= decl_jump_unsafe (new_decls
);
2720 identify_goto (decl
, locus
);
2724 error (" crosses initialization of %q+#D", new_decls
);
2726 permerror (input_location
, " enters scope of %q+#D which has "
2727 "non-trivial destructor", new_decls
);
2732 if ((b
->kind
== sk_try
|| b
->kind
== sk_catch
) && !saw_eh
)
2736 identify_goto (decl
, locus
);
2739 if (b
->kind
== sk_try
)
2740 error (" enters try block");
2742 error (" enters catch block");
2745 if (b
->kind
== sk_omp
&& !saw_omp
)
2749 identify_goto (decl
, locus
);
2752 error (" enters OpenMP structured block");
2761 check_previous_goto (tree decl
, struct named_label_use_entry
*use
)
2763 check_previous_goto_1 (decl
, use
->binding_level
,
2764 use
->names_in_scope
, use
->in_omp_scope
,
2765 &use
->o_goto_locus
);
2769 check_switch_goto (cp_binding_level
* level
)
2771 return check_previous_goto_1 (NULL_TREE
, level
, level
->names
, false, NULL
);
2774 /* Check that a new jump to a label DECL is OK. Called by
2775 finish_goto_stmt. */
2778 check_goto (tree decl
)
2780 struct named_label_entry
*ent
, dummy
;
2781 bool saw_catch
= false, identified
= false;
2785 /* We can't know where a computed goto is jumping.
2786 So we assume that it's OK. */
2787 if (TREE_CODE (decl
) != LABEL_DECL
)
2790 /* We didn't record any information about this label when we created it,
2791 and there's not much point since it's trivial to analyze as a return. */
2792 if (decl
== cdtor_label
)
2795 dummy
.label_decl
= decl
;
2796 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2797 gcc_assert (ent
!= NULL
);
2799 /* If the label hasn't been defined yet, defer checking. */
2800 if (! DECL_INITIAL (decl
))
2802 struct named_label_use_entry
*new_use
;
2804 /* Don't bother creating another use if the last goto had the
2805 same data, and will therefore create the same set of errors. */
2807 && ent
->uses
->names_in_scope
== current_binding_level
->names
)
2810 new_use
= ggc_alloc_named_label_use_entry ();
2811 new_use
->binding_level
= current_binding_level
;
2812 new_use
->names_in_scope
= current_binding_level
->names
;
2813 new_use
->o_goto_locus
= input_location
;
2814 new_use
->in_omp_scope
= false;
2816 new_use
->next
= ent
->uses
;
2817 ent
->uses
= new_use
;
2821 if (ent
->in_try_scope
|| ent
->in_catch_scope
2822 || ent
->in_omp_scope
|| !VEC_empty (tree
, ent
->bad_decls
))
2824 permerror (input_location
, "jump to label %q+D", decl
);
2825 permerror (input_location
, " from here");
2829 FOR_EACH_VEC_ELT (tree
, ent
->bad_decls
, ix
, bad
)
2831 int u
= decl_jump_unsafe (bad
);
2833 if (u
> 1 && DECL_ARTIFICIAL (bad
))
2835 /* Can't skip init of __exception_info. */
2836 error_at (DECL_SOURCE_LOCATION (bad
), " enters catch block");
2840 error (" skips initialization of %q+#D", bad
);
2842 permerror (input_location
, " enters scope of %q+#D which has "
2843 "non-trivial destructor", bad
);
2846 if (ent
->in_try_scope
)
2847 error (" enters try block");
2848 else if (ent
->in_catch_scope
&& !saw_catch
)
2849 error (" enters catch block");
2851 if (ent
->in_omp_scope
)
2852 error (" enters OpenMP structured block");
2853 else if (flag_openmp
)
2855 cp_binding_level
*b
;
2856 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2858 if (b
== ent
->binding_level
)
2860 if (b
->kind
== sk_omp
)
2864 permerror (input_location
, "jump to label %q+D", decl
);
2865 permerror (input_location
, " from here");
2868 error (" exits OpenMP structured block");
2875 /* Check that a return is ok wrt OpenMP structured blocks.
2876 Called by finish_return_stmt. Returns true if all is well. */
2879 check_omp_return (void)
2881 cp_binding_level
*b
;
2882 for (b
= current_binding_level
; b
; b
= b
->level_chain
)
2883 if (b
->kind
== sk_omp
)
2885 error ("invalid exit from OpenMP structured block");
2888 else if (b
->kind
== sk_function_parms
)
2893 /* Define a label, specifying the location in the source file.
2894 Return the LABEL_DECL node for the label. */
2897 define_label_1 (location_t location
, tree name
)
2899 struct named_label_entry
*ent
, dummy
;
2900 cp_binding_level
*p
;
2903 decl
= lookup_label (name
);
2905 dummy
.label_decl
= decl
;
2906 ent
= (struct named_label_entry
*) htab_find (named_labels
, &dummy
);
2907 gcc_assert (ent
!= NULL
);
2909 /* After labels, make any new cleanups in the function go into their
2910 own new (temporary) binding contour. */
2911 for (p
= current_binding_level
;
2912 p
->kind
!= sk_function_parms
;
2914 p
->more_cleanups_ok
= 0;
2916 if (name
== get_identifier ("wchar_t"))
2917 permerror (input_location
, "label named wchar_t");
2919 if (DECL_INITIAL (decl
) != NULL_TREE
)
2921 error ("duplicate label %qD", decl
);
2922 return error_mark_node
;
2926 struct named_label_use_entry
*use
;
2928 /* Mark label as having been defined. */
2929 DECL_INITIAL (decl
) = error_mark_node
;
2930 /* Say where in the source. */
2931 DECL_SOURCE_LOCATION (decl
) = location
;
2933 ent
->binding_level
= current_binding_level
;
2934 ent
->names_in_scope
= current_binding_level
->names
;
2936 for (use
= ent
->uses
; use
; use
= use
->next
)
2937 check_previous_goto (decl
, use
);
2944 /* Wrapper for define_label_1. */
2947 define_label (location_t location
, tree name
)
2950 bool running
= timevar_cond_start (TV_NAME_LOOKUP
);
2951 ret
= define_label_1 (location
, name
);
2952 timevar_cond_stop (TV_NAME_LOOKUP
, running
);
2959 cp_binding_level
*level
;
2960 struct cp_switch
*next
;
2961 /* The SWITCH_STMT being built. */
2963 /* A splay-tree mapping the low element of a case range to the high
2964 element, or NULL_TREE if there is no high element. Used to
2965 determine whether or not a new case label duplicates an old case
2966 label. We need a tree, rather than simply a hash table, because
2967 of the GNU case range extension. */
2971 /* A stack of the currently active switch statements. The innermost
2972 switch statement is on the top of the stack. There is no need to
2973 mark the stack for garbage collection because it is only active
2974 during the processing of the body of a function, and we never
2975 collect at that point. */
2977 static struct cp_switch
*switch_stack
;
2979 /* Called right after a switch-statement condition is parsed.
2980 SWITCH_STMT is the switch statement being parsed. */
2983 push_switch (tree switch_stmt
)
2985 struct cp_switch
*p
= XNEW (struct cp_switch
);
2986 p
->level
= current_binding_level
;
2987 p
->next
= switch_stack
;
2988 p
->switch_stmt
= switch_stmt
;
2989 p
->cases
= splay_tree_new (case_compare
, NULL
, NULL
);
2996 struct cp_switch
*cs
= switch_stack
;
2997 location_t switch_location
;
2999 /* Emit warnings as needed. */
3000 switch_location
= EXPR_LOC_OR_HERE (cs
->switch_stmt
);
3001 if (!processing_template_decl
)
3002 c_do_switch_warnings (cs
->cases
, switch_location
,
3003 SWITCH_STMT_TYPE (cs
->switch_stmt
),
3004 SWITCH_STMT_COND (cs
->switch_stmt
));
3006 splay_tree_delete (cs
->cases
);
3007 switch_stack
= switch_stack
->next
;
3011 /* Convert a case constant VALUE in a switch to the type TYPE of the switch
3012 condition. Note that if TYPE and VALUE are already integral we don't
3013 really do the conversion because the language-independent
3014 warning/optimization code will work better that way. */
3017 case_conversion (tree type
, tree value
)
3019 if (value
== NULL_TREE
)
3022 if (cxx_dialect
>= cxx0x
3023 && (SCOPED_ENUM_P (type
)
3024 || !INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (TREE_TYPE (value
))))
3026 if (INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
3027 type
= type_promotes_to (type
);
3028 value
= perform_implicit_conversion (type
, value
, tf_warning_or_error
);
3030 return cxx_constant_value (value
);
3033 /* Note that we've seen a definition of a case label, and complain if this
3034 is a bad place for one. */
3037 finish_case_label (location_t loc
, tree low_value
, tree high_value
)
3040 cp_binding_level
*p
;
3043 if (processing_template_decl
)
3047 /* For templates, just add the case label; we'll do semantic
3048 analysis at instantiation-time. */
3049 label
= build_decl (loc
, LABEL_DECL
, NULL_TREE
, NULL_TREE
);
3050 return add_stmt (build_case_label (low_value
, high_value
, label
));
3053 /* Find the condition on which this switch statement depends. */
3054 cond
= SWITCH_STMT_COND (switch_stack
->switch_stmt
);
3055 if (cond
&& TREE_CODE (cond
) == TREE_LIST
)
3056 cond
= TREE_VALUE (cond
);
3058 if (!check_switch_goto (switch_stack
->level
))
3059 return error_mark_node
;
3061 type
= SWITCH_STMT_TYPE (switch_stack
->switch_stmt
);
3063 low_value
= case_conversion (type
, low_value
);
3064 high_value
= case_conversion (type
, high_value
);
3066 r
= c_add_case_label (loc
, switch_stack
->cases
, cond
, type
,
3067 low_value
, high_value
);
3069 /* After labels, make any new cleanups in the function go into their
3070 own new (temporary) binding contour. */
3071 for (p
= current_binding_level
;
3072 p
->kind
!= sk_function_parms
;
3074 p
->more_cleanups_ok
= 0;
3079 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3082 typename_hash (const void* k
)
3085 const_tree
const t
= (const_tree
) k
;
3087 hash
= (htab_hash_pointer (TYPE_CONTEXT (t
))
3088 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t
))));
3093 typedef struct typename_info
{
3101 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3102 really of type `typename_info*' */
3105 typename_compare (const void * k1
, const void * k2
)
3107 const_tree
const t1
= (const_tree
) k1
;
3108 const typename_info
*const t2
= (const typename_info
*) k2
;
3110 return (DECL_NAME (TYPE_NAME (t1
)) == t2
->name
3111 && TYPE_CONTEXT (t1
) == t2
->scope
3112 && TYPENAME_TYPE_FULLNAME (t1
) == t2
->template_id
3113 && TYPENAME_IS_ENUM_P (t1
) == t2
->enum_p
3114 && TYPENAME_IS_CLASS_P (t1
) == t2
->class_p
);
3117 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3118 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3120 Returns the new TYPENAME_TYPE. */
3122 static GTY ((param_is (union tree_node
))) htab_t typename_htab
;
3125 build_typename_type (tree context
, tree name
, tree fullname
,
3126 enum tag_types tag_type
)
3134 if (typename_htab
== NULL
)
3135 typename_htab
= htab_create_ggc (61, &typename_hash
,
3136 &typename_compare
, NULL
);
3138 ti
.scope
= FROB_CONTEXT (context
);
3140 ti
.template_id
= fullname
;
3141 ti
.enum_p
= tag_type
== enum_type
;
3142 ti
.class_p
= (tag_type
== class_type
3143 || tag_type
== record_type
3144 || tag_type
== union_type
);
3145 hash
= (htab_hash_pointer (ti
.scope
)
3146 ^ htab_hash_pointer (ti
.name
));
3148 /* See if we already have this type. */
3149 e
= htab_find_slot_with_hash (typename_htab
, &ti
, hash
, INSERT
);
3154 /* Build the TYPENAME_TYPE. */
3155 t
= cxx_make_type (TYPENAME_TYPE
);
3156 TYPE_CONTEXT (t
) = ti
.scope
;
3157 TYPENAME_TYPE_FULLNAME (t
) = ti
.template_id
;
3158 TYPENAME_IS_ENUM_P (t
) = ti
.enum_p
;
3159 TYPENAME_IS_CLASS_P (t
) = ti
.class_p
;
3161 /* Build the corresponding TYPE_DECL. */
3162 d
= build_decl (input_location
, TYPE_DECL
, name
, t
);
3163 TYPE_NAME (TREE_TYPE (d
)) = d
;
3164 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3165 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3166 DECL_ARTIFICIAL (d
) = 1;
3168 /* Store it in the hash table. */
3171 /* TYPENAME_TYPEs must always be compared structurally, because
3172 they may or may not resolve down to another type depending on
3173 the currently open classes. */
3174 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3180 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3181 provided to name the type. Returns an appropriate type, unless an
3182 error occurs, in which case error_mark_node is returned. If we
3183 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3184 return that, rather than the _TYPE it corresponds to, in other
3185 cases we look through the type decl. If TF_ERROR is set, complain
3186 about errors, otherwise be quiet. */
3189 make_typename_type (tree context
, tree name
, enum tag_types tag_type
,
3190 tsubst_flags_t complain
)
3196 if (name
== error_mark_node
3197 || context
== NULL_TREE
3198 || context
== error_mark_node
)
3199 return error_mark_node
;
3203 if (!(TYPE_LANG_SPECIFIC (name
)
3204 && (CLASSTYPE_IS_TEMPLATE (name
)
3205 || CLASSTYPE_USE_TEMPLATE (name
))))
3206 name
= TYPE_IDENTIFIER (name
);
3208 /* Create a TEMPLATE_ID_EXPR for the type. */
3209 name
= build_nt (TEMPLATE_ID_EXPR
,
3210 CLASSTYPE_TI_TEMPLATE (name
),
3211 CLASSTYPE_TI_ARGS (name
));
3213 else if (TREE_CODE (name
) == TYPE_DECL
)
3214 name
= DECL_NAME (name
);
3218 if (TREE_CODE (name
) == TEMPLATE_ID_EXPR
)
3220 name
= TREE_OPERAND (name
, 0);
3221 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3222 name
= TREE_OPERAND (fullname
, 0) = DECL_NAME (name
);
3223 else if (TREE_CODE (name
) == OVERLOAD
)
3225 error ("%qD is not a type", name
);
3226 return error_mark_node
;
3229 if (TREE_CODE (name
) == TEMPLATE_DECL
)
3231 error ("%qD used without template parameters", name
);
3232 return error_mark_node
;
3234 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3235 gcc_assert (TYPE_P (context
));
3237 if (!MAYBE_CLASS_TYPE_P (context
))
3239 if (complain
& tf_error
)
3240 error ("%q#T is not a class", context
);
3241 return error_mark_node
;
3244 /* When the CONTEXT is a dependent type, NAME could refer to a
3245 dependent base class of CONTEXT. But look inside it anyway
3246 if CONTEXT is a currently open scope, in case it refers to a
3247 member of the current instantiation or a non-dependent base;
3248 lookup will stop when we hit a dependent base. */
3249 if (!dependent_scope_p (context
))
3250 /* We should only set WANT_TYPE when we're a nested typename type.
3251 Then we can give better diagnostics if we find a non-type. */
3252 t
= lookup_field (context
, name
, 2, /*want_type=*/true);
3256 if ((!t
|| TREE_CODE (t
) == TREE_LIST
) && dependent_type_p (context
))
3257 return build_typename_type (context
, name
, fullname
, tag_type
);
3259 want_template
= TREE_CODE (fullname
) == TEMPLATE_ID_EXPR
;
3263 if (complain
& tf_error
)
3264 error (want_template
? G_("no class template named %q#T in %q#T")
3265 : G_("no type named %q#T in %q#T"), name
, context
);
3266 return error_mark_node
;
3269 /* Pull out the template from an injected-class-name (or multiple). */
3271 t
= maybe_get_template_decl_from_type_decl (t
);
3273 if (TREE_CODE (t
) == TREE_LIST
)
3275 if (complain
& tf_error
)
3277 error ("lookup of %qT in %qT is ambiguous", name
, context
);
3278 print_candidates (t
);
3280 return error_mark_node
;
3283 if (want_template
&& !DECL_TYPE_TEMPLATE_P (t
))
3285 if (complain
& tf_error
)
3286 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3288 return error_mark_node
;
3290 if (!want_template
&& TREE_CODE (t
) != TYPE_DECL
)
3292 if (complain
& tf_error
)
3293 error ("%<typename %T::%D%> names %q#T, which is not a type",
3295 return error_mark_node
;
3298 if (complain
& tf_error
)
3299 perform_or_defer_access_check (TYPE_BINFO (context
), t
, t
);
3301 /* If we are currently parsing a template and if T is a typedef accessed
3302 through CONTEXT then we need to remember and check access of T at
3303 template instantiation time. */
3304 add_typedef_to_current_template_for_access_check (t
, context
, input_location
);
3307 return lookup_template_class (t
, TREE_OPERAND (fullname
, 1),
3309 /*entering_scope=*/0,
3310 tf_warning_or_error
| tf_user
);
3312 if (DECL_ARTIFICIAL (t
) || !(complain
& tf_keep_type_decl
))
3318 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3319 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3320 in which case error_mark_node is returned.
3322 If PARM_LIST is non-NULL, also make sure that the template parameter
3323 list of TEMPLATE_DECL matches.
3325 If COMPLAIN zero, don't complain about any errors that occur. */
3328 make_unbound_class_template (tree context
, tree name
, tree parm_list
,
3329 tsubst_flags_t complain
)
3335 name
= TYPE_IDENTIFIER (name
);
3336 else if (DECL_P (name
))
3337 name
= DECL_NAME (name
);
3338 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
3340 if (!dependent_type_p (context
)
3341 || currently_open_class (context
))
3343 tree tmpl
= NULL_TREE
;
3345 if (MAYBE_CLASS_TYPE_P (context
))
3346 tmpl
= lookup_field (context
, name
, 0, false);
3348 if (tmpl
&& TREE_CODE (tmpl
) == TYPE_DECL
)
3349 tmpl
= maybe_get_template_decl_from_type_decl (tmpl
);
3351 if (!tmpl
|| !DECL_TYPE_TEMPLATE_P (tmpl
))
3353 if (complain
& tf_error
)
3354 error ("no class template named %q#T in %q#T", name
, context
);
3355 return error_mark_node
;
3359 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl
), parm_list
))
3361 if (complain
& tf_error
)
3363 error ("template parameters do not match template");
3364 error ("%q+D declared here", tmpl
);
3366 return error_mark_node
;
3369 if (complain
& tf_error
)
3370 perform_or_defer_access_check (TYPE_BINFO (context
), tmpl
, tmpl
);
3375 /* Build the UNBOUND_CLASS_TEMPLATE. */
3376 t
= cxx_make_type (UNBOUND_CLASS_TEMPLATE
);
3377 TYPE_CONTEXT (t
) = FROB_CONTEXT (context
);
3378 TREE_TYPE (t
) = NULL_TREE
;
3379 SET_TYPE_STRUCTURAL_EQUALITY (t
);
3381 /* Build the corresponding TEMPLATE_DECL. */
3382 d
= build_decl (input_location
, TEMPLATE_DECL
, name
, t
);
3383 TYPE_NAME (TREE_TYPE (d
)) = d
;
3384 TYPE_STUB_DECL (TREE_TYPE (d
)) = d
;
3385 DECL_CONTEXT (d
) = FROB_CONTEXT (context
);
3386 DECL_ARTIFICIAL (d
) = 1;
3387 DECL_TEMPLATE_PARMS (d
) = parm_list
;
3394 /* Push the declarations of builtin types into the namespace.
3395 RID_INDEX is the index of the builtin type in the array
3396 RID_POINTERS. NAME is the name used when looking up the builtin
3397 type. TYPE is the _TYPE node for the builtin type. */
3400 record_builtin_type (enum rid rid_index
,
3404 tree rname
= NULL_TREE
, tname
= NULL_TREE
;
3405 tree tdecl
= NULL_TREE
;
3407 if ((int) rid_index
< (int) RID_MAX
)
3408 rname
= ridpointers
[(int) rid_index
];
3410 tname
= get_identifier (name
);
3412 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3413 eliminated. Built-in types should not be looked up name; their
3414 names are keywords that the parser can recognize. However, there
3415 is code in c-common.c that uses identifier_global_value to look
3416 up built-in types by name. */
3419 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, tname
, type
);
3420 DECL_ARTIFICIAL (tdecl
) = 1;
3421 SET_IDENTIFIER_GLOBAL_VALUE (tname
, tdecl
);
3427 tdecl
= build_decl (BUILTINS_LOCATION
, TYPE_DECL
, rname
, type
);
3428 DECL_ARTIFICIAL (tdecl
) = 1;
3430 SET_IDENTIFIER_GLOBAL_VALUE (rname
, tdecl
);
3433 if (!TYPE_NAME (type
))
3434 TYPE_NAME (type
) = tdecl
;
3437 debug_hooks
->type_decl (tdecl
, 0);
3440 /* Record one of the standard Java types.
3441 * Declare it as having the given NAME.
3442 * If SIZE > 0, it is the size of one of the integral types;
3443 * otherwise it is the negative of the size of one of the other types. */
3446 record_builtin_java_type (const char* name
, int size
)
3451 type
= build_nonstandard_integer_type (size
, 0);
3452 type
= build_distinct_type_copy (type
);
3454 else if (size
> -32)
3457 /* "__java_char" or ""__java_boolean". */
3458 type
= build_nonstandard_integer_type (-size
, 1);
3459 type
= build_distinct_type_copy (type
);
3460 /* Get the signed type cached and attached to the unsigned type,
3461 so it doesn't get garbage-collected at "random" times,
3462 causing potential codegen differences out of different UIDs
3463 and different alias set numbers. */
3464 stype
= build_nonstandard_integer_type (-size
, 0);
3465 stype
= build_distinct_type_copy (stype
);
3466 TREE_CHAIN (type
) = stype
;
3467 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3470 { /* "__java_float" or ""__java_double". */
3471 type
= make_node (REAL_TYPE
);
3472 TYPE_PRECISION (type
) = - size
;
3475 record_builtin_type (RID_MAX
, name
, type
);
3476 decl
= TYPE_NAME (type
);
3478 /* Suppress generate debug symbol entries for these types,
3479 since for normal C++ they are just clutter.
3480 However, push_lang_context undoes this if extern "Java" is seen. */
3481 DECL_IGNORED_P (decl
) = 1;
3483 TYPE_FOR_JAVA (type
) = 1;
3487 /* Push a type into the namespace so that the back ends ignore it. */
3490 record_unknown_type (tree type
, const char* name
)
3492 tree decl
= pushdecl (build_decl (UNKNOWN_LOCATION
,
3493 TYPE_DECL
, get_identifier (name
), type
));
3494 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3495 DECL_IGNORED_P (decl
) = 1;
3496 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
3497 TYPE_SIZE (type
) = TYPE_SIZE (void_type_node
);
3498 TYPE_ALIGN (type
) = 1;
3499 TYPE_USER_ALIGN (type
) = 0;
3500 SET_TYPE_MODE (type
, TYPE_MODE (void_type_node
));
3503 /* A string for which we should create an IDENTIFIER_NODE at
3506 typedef struct predefined_identifier
3508 /* The name of the identifier. */
3509 const char *const name
;
3510 /* The place where the IDENTIFIER_NODE should be stored. */
3512 /* Nonzero if this is the name of a constructor or destructor. */
3513 const int ctor_or_dtor_p
;
3514 } predefined_identifier
;
3516 /* Create all the predefined identifiers. */
3519 initialize_predefined_identifiers (void)
3521 const predefined_identifier
*pid
;
3523 /* A table of identifiers to create at startup. */
3524 static const predefined_identifier predefined_identifiers
[] = {
3525 { "C++", &lang_name_cplusplus
, 0 },
3526 { "C", &lang_name_c
, 0 },
3527 { "Java", &lang_name_java
, 0 },
3528 /* Some of these names have a trailing space so that it is
3529 impossible for them to conflict with names written by users. */
3530 { "__ct ", &ctor_identifier
, 1 },
3531 { "__base_ctor ", &base_ctor_identifier
, 1 },
3532 { "__comp_ctor ", &complete_ctor_identifier
, 1 },
3533 { "__dt ", &dtor_identifier
, 1 },
3534 { "__comp_dtor ", &complete_dtor_identifier
, 1 },
3535 { "__base_dtor ", &base_dtor_identifier
, 1 },
3536 { "__deleting_dtor ", &deleting_dtor_identifier
, 1 },
3537 { IN_CHARGE_NAME
, &in_charge_identifier
, 0 },
3538 { "nelts", &nelts_identifier
, 0 },
3539 { THIS_NAME
, &this_identifier
, 0 },
3540 { VTABLE_DELTA_NAME
, &delta_identifier
, 0 },
3541 { VTABLE_PFN_NAME
, &pfn_identifier
, 0 },
3542 { "_vptr", &vptr_identifier
, 0 },
3543 { "__vtt_parm", &vtt_parm_identifier
, 0 },
3544 { "::", &global_scope_name
, 0 },
3545 { "std", &std_identifier
, 0 },
3549 for (pid
= predefined_identifiers
; pid
->name
; ++pid
)
3551 *pid
->node
= get_identifier (pid
->name
);
3552 if (pid
->ctor_or_dtor_p
)
3553 IDENTIFIER_CTOR_OR_DTOR_P (*pid
->node
) = 1;
3557 /* Create the predefined scalar types of C,
3558 and some nodes representing standard constants (0, 1, (void *)0).
3559 Initialize the global binding level.
3560 Make definitions for built-in primitive functions. */
3563 cxx_init_decl_processing (void)
3566 tree void_ftype_ptr
;
3568 /* Create all the identifiers we need. */
3569 initialize_predefined_identifiers ();
3571 /* Create the global variables. */
3572 push_to_top_level ();
3574 current_function_decl
= NULL_TREE
;
3575 current_binding_level
= NULL
;
3576 /* Enter the global namespace. */
3577 gcc_assert (global_namespace
== NULL_TREE
);
3578 global_namespace
= build_lang_decl (NAMESPACE_DECL
, global_scope_name
,
3580 DECL_CONTEXT (global_namespace
) = build_translation_unit_decl (NULL_TREE
);
3581 TREE_PUBLIC (global_namespace
) = 1;
3582 begin_scope (sk_namespace
, global_namespace
);
3584 if (flag_visibility_ms_compat
)
3585 default_visibility
= VISIBILITY_HIDDEN
;
3588 current_lang_name
= lang_name_c
;
3590 /* Create the `std' namespace. */
3591 push_namespace (std_identifier
);
3592 std_node
= current_namespace
;
3595 c_common_nodes_and_builtins ();
3597 java_byte_type_node
= record_builtin_java_type ("__java_byte", 8);
3598 java_short_type_node
= record_builtin_java_type ("__java_short", 16);
3599 java_int_type_node
= record_builtin_java_type ("__java_int", 32);
3600 java_long_type_node
= record_builtin_java_type ("__java_long", 64);
3601 java_float_type_node
= record_builtin_java_type ("__java_float", -32);
3602 java_double_type_node
= record_builtin_java_type ("__java_double", -64);
3603 java_char_type_node
= record_builtin_java_type ("__java_char", -16);
3604 java_boolean_type_node
= record_builtin_java_type ("__java_boolean", -1);
3606 integer_two_node
= build_int_cst (NULL_TREE
, 2);
3608 record_builtin_type (RID_BOOL
, "bool", boolean_type_node
);
3609 truthvalue_type_node
= boolean_type_node
;
3610 truthvalue_false_node
= boolean_false_node
;
3611 truthvalue_true_node
= boolean_true_node
;
3613 empty_except_spec
= build_tree_list (NULL_TREE
, NULL_TREE
);
3614 noexcept_true_spec
= build_tree_list (boolean_true_node
, NULL_TREE
);
3615 noexcept_false_spec
= build_tree_list (boolean_false_node
, NULL_TREE
);
3618 record_builtin_type (RID_MAX
, NULL
, string_type_node
);
3621 delta_type_node
= ptrdiff_type_node
;
3622 vtable_index_type
= ptrdiff_type_node
;
3624 vtt_parm_type
= build_pointer_type (const_ptr_type_node
);
3625 void_ftype
= build_function_type_list (void_type_node
, NULL_TREE
);
3626 void_ftype_ptr
= build_function_type_list (void_type_node
,
3627 ptr_type_node
, NULL_TREE
);
3629 = build_exception_variant (void_ftype_ptr
, empty_except_spec
);
3631 /* C++ extensions */
3633 unknown_type_node
= make_node (LANG_TYPE
);
3634 record_unknown_type (unknown_type_node
, "unknown type");
3636 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3637 TREE_TYPE (unknown_type_node
) = unknown_type_node
;
3639 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3641 TYPE_POINTER_TO (unknown_type_node
) = unknown_type_node
;
3642 TYPE_REFERENCE_TO (unknown_type_node
) = unknown_type_node
;
3644 init_list_type_node
= make_node (LANG_TYPE
);
3645 record_unknown_type (init_list_type_node
, "init list");
3647 dependent_lambda_return_type_node
= make_node (LANG_TYPE
);
3648 record_unknown_type (dependent_lambda_return_type_node
,
3649 "undeduced lambda return type");
3652 /* Make sure we get a unique function type, so we can give
3653 its pointer type a name. (This wins for gdb.) */
3654 tree vfunc_type
= make_node (FUNCTION_TYPE
);
3655 TREE_TYPE (vfunc_type
) = integer_type_node
;
3656 TYPE_ARG_TYPES (vfunc_type
) = NULL_TREE
;
3657 layout_type (vfunc_type
);
3659 vtable_entry_type
= build_pointer_type (vfunc_type
);
3661 record_builtin_type (RID_MAX
, VTBL_PTR_TYPE
, vtable_entry_type
);
3664 = build_cplus_array_type (vtable_entry_type
, NULL_TREE
);
3665 layout_type (vtbl_type_node
);
3666 vtbl_type_node
= cp_build_qualified_type (vtbl_type_node
, TYPE_QUAL_CONST
);
3667 record_builtin_type (RID_MAX
, NULL
, vtbl_type_node
);
3668 vtbl_ptr_type_node
= build_pointer_type (vtable_entry_type
);
3669 layout_type (vtbl_ptr_type_node
);
3670 record_builtin_type (RID_MAX
, NULL
, vtbl_ptr_type_node
);
3672 push_namespace (get_identifier ("__cxxabiv1"));
3673 abi_node
= current_namespace
;
3676 global_type_node
= make_node (LANG_TYPE
);
3677 record_unknown_type (global_type_node
, "global type");
3680 current_lang_name
= lang_name_cplusplus
;
3683 tree newattrs
, extvisattr
;
3684 tree newtype
, deltype
;
3685 tree ptr_ftype_sizetype
;
3689 = build_function_type_list (ptr_type_node
, size_type_node
, NULL_TREE
);
3690 if (cxx_dialect
== cxx98
)
3693 tree bad_alloc_type_node
;
3694 tree bad_alloc_decl
;
3696 push_namespace (std_identifier
);
3697 bad_alloc_id
= get_identifier ("bad_alloc");
3698 bad_alloc_type_node
= make_class_type (RECORD_TYPE
);
3699 TYPE_CONTEXT (bad_alloc_type_node
) = current_namespace
;
3701 = create_implicit_typedef (bad_alloc_id
, bad_alloc_type_node
);
3702 DECL_CONTEXT (bad_alloc_decl
) = current_namespace
;
3706 = add_exception_specifier (NULL_TREE
, bad_alloc_type_node
, -1);
3709 new_eh_spec
= noexcept_false_spec
;
3711 /* Ensure attribs.c is initialized. */
3713 extvisattr
= build_tree_list (get_identifier ("externally_visible"),
3715 newattrs
= tree_cons (get_identifier ("alloc_size"),
3716 build_tree_list (NULL_TREE
, integer_one_node
),
3718 newtype
= cp_build_type_attribute_variant (ptr_ftype_sizetype
, newattrs
);
3719 newtype
= build_exception_variant (newtype
, new_eh_spec
);
3720 deltype
= cp_build_type_attribute_variant (void_ftype_ptr
, extvisattr
);
3721 deltype
= build_exception_variant (deltype
, empty_except_spec
);
3722 push_cp_library_fn (NEW_EXPR
, newtype
);
3723 push_cp_library_fn (VEC_NEW_EXPR
, newtype
);
3724 global_delete_fndecl
= push_cp_library_fn (DELETE_EXPR
, deltype
);
3725 push_cp_library_fn (VEC_DELETE_EXPR
, deltype
);
3727 nullptr_type_node
= make_node (NULLPTR_TYPE
);
3728 TYPE_SIZE (nullptr_type_node
) = bitsize_int (GET_MODE_BITSIZE (ptr_mode
));
3729 TYPE_SIZE_UNIT (nullptr_type_node
) = size_int (GET_MODE_SIZE (ptr_mode
));
3730 TYPE_UNSIGNED (nullptr_type_node
) = 1;
3731 TYPE_PRECISION (nullptr_type_node
) = GET_MODE_BITSIZE (ptr_mode
);
3732 SET_TYPE_MODE (nullptr_type_node
, ptr_mode
);
3733 record_builtin_type (RID_MAX
, "decltype(nullptr)", nullptr_type_node
);
3734 nullptr_node
= build_int_cst (nullptr_type_node
, 0);
3738 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype
);
3740 /* Perform other language dependent initializations. */
3741 init_class_processing ();
3742 init_rtti_processing ();
3743 init_template_processing ();
3745 if (flag_exceptions
)
3746 init_exception_processing ();
3748 if (! supports_one_only ())
3751 make_fname_decl
= cp_make_fname_decl
;
3752 start_fname_decls ();
3754 /* Show we use EH for cleanups. */
3755 if (flag_exceptions
)
3756 using_eh_for_cleanups ();
3759 /* Generate an initializer for a function naming variable from
3760 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3761 filled in with the type of the init. */
3764 cp_fname_init (const char* name
, tree
*type_p
)
3766 tree domain
= NULL_TREE
;
3768 tree init
= NULL_TREE
;
3773 length
= strlen (name
);
3774 domain
= build_index_type (size_int (length
));
3775 init
= build_string (length
+ 1, name
);
3778 type
= cp_build_qualified_type (char_type_node
, TYPE_QUAL_CONST
);
3779 type
= build_cplus_array_type (type
, domain
);
3784 TREE_TYPE (init
) = type
;
3786 init
= error_mark_node
;
3791 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3792 the decl, LOC is the location to give the decl, NAME is the
3793 initialization string and TYPE_DEP indicates whether NAME depended
3794 on the type of the function. We make use of that to detect
3795 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3796 at the point of first use, so we mustn't push the decl now. */
3799 cp_make_fname_decl (location_t loc
, tree id
, int type_dep
)
3801 const char *const name
= (type_dep
&& processing_template_decl
3802 ? NULL
: fname_as_string (type_dep
));
3804 tree init
= cp_fname_init (name
, &type
);
3805 tree decl
= build_decl (loc
, VAR_DECL
, id
, type
);
3808 free (CONST_CAST (char *, name
));
3810 /* As we're using pushdecl_with_scope, we must set the context. */
3811 DECL_CONTEXT (decl
) = current_function_decl
;
3812 DECL_PRETTY_FUNCTION_P (decl
) = type_dep
;
3814 TREE_STATIC (decl
) = 1;
3815 TREE_READONLY (decl
) = 1;
3816 DECL_ARTIFICIAL (decl
) = 1;
3818 TREE_USED (decl
) = 1;
3820 if (current_function_decl
)
3822 cp_binding_level
*b
= current_binding_level
;
3823 if (b
->kind
== sk_function_parms
)
3824 return error_mark_node
;
3825 while (b
->level_chain
->kind
!= sk_function_parms
)
3827 pushdecl_with_scope (decl
, b
, /*is_friend=*/false);
3828 cp_finish_decl (decl
, init
, /*init_const_expr_p=*/false, NULL_TREE
,
3829 LOOKUP_ONLYCONVERTING
);
3833 DECL_THIS_STATIC (decl
) = true;
3834 pushdecl_top_level_and_finish (decl
, init
);
3841 builtin_function_1 (tree decl
, tree context
, bool is_global
)
3843 tree id
= DECL_NAME (decl
);
3844 const char *name
= IDENTIFIER_POINTER (id
);
3846 retrofit_lang_decl (decl
);
3848 DECL_ARTIFICIAL (decl
) = 1;
3849 SET_OVERLOADED_OPERATOR_CODE (decl
, ERROR_MARK
);
3850 SET_DECL_LANGUAGE (decl
, lang_c
);
3851 /* Runtime library routines are, by definition, available in an
3852 external shared object. */
3853 DECL_VISIBILITY (decl
) = VISIBILITY_DEFAULT
;
3854 DECL_VISIBILITY_SPECIFIED (decl
) = 1;
3856 DECL_CONTEXT (decl
) = context
;
3859 pushdecl_top_level (decl
);
3863 /* A function in the user's namespace should have an explicit
3864 declaration before it is used. Mark the built-in function as
3865 anticipated but not actually declared. */
3866 if (name
[0] != '_' || name
[1] != '_')
3867 DECL_ANTICIPATED (decl
) = 1;
3868 else if (strncmp (name
+ 2, "builtin_", strlen ("builtin_")) != 0)
3870 size_t len
= strlen (name
);
3872 /* Treat __*_chk fortification functions as anticipated as well,
3873 unless they are __builtin_*. */
3874 if (len
> strlen ("___chk")
3875 && memcmp (name
+ len
- strlen ("_chk"),
3876 "_chk", strlen ("_chk") + 1) == 0)
3877 DECL_ANTICIPATED (decl
) = 1;
3884 cxx_builtin_function (tree decl
)
3886 tree id
= DECL_NAME (decl
);
3887 const char *name
= IDENTIFIER_POINTER (id
);
3888 /* All builtins that don't begin with an '_' should additionally
3889 go in the 'std' namespace. */
3892 tree decl2
= copy_node(decl
);
3893 push_namespace (std_identifier
);
3894 builtin_function_1 (decl2
, std_node
, false);
3898 return builtin_function_1 (decl
, NULL_TREE
, false);
3901 /* Like cxx_builtin_function, but guarantee the function is added to the global
3902 scope. This is to allow function specific options to add new machine
3903 dependent builtins when the target ISA changes via attribute((target(...)))
3904 which saves space on program startup if the program does not use non-generic
3908 cxx_builtin_function_ext_scope (tree decl
)
3911 tree id
= DECL_NAME (decl
);
3912 const char *name
= IDENTIFIER_POINTER (id
);
3913 /* All builtins that don't begin with an '_' should additionally
3914 go in the 'std' namespace. */
3917 tree decl2
= copy_node(decl
);
3918 push_namespace (std_identifier
);
3919 builtin_function_1 (decl2
, std_node
, true);
3923 return builtin_function_1 (decl
, NULL_TREE
, true);
3926 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3927 function. Not called directly. */
3930 build_library_fn_1 (tree name
, enum tree_code operator_code
, tree type
)
3932 tree fn
= build_lang_decl (FUNCTION_DECL
, name
, type
);
3933 DECL_EXTERNAL (fn
) = 1;
3934 TREE_PUBLIC (fn
) = 1;
3935 DECL_ARTIFICIAL (fn
) = 1;
3936 SET_OVERLOADED_OPERATOR_CODE (fn
, operator_code
);
3937 SET_DECL_LANGUAGE (fn
, lang_c
);
3938 /* Runtime library routines are, by definition, available in an
3939 external shared object. */
3940 DECL_VISIBILITY (fn
) = VISIBILITY_DEFAULT
;
3941 DECL_VISIBILITY_SPECIFIED (fn
) = 1;
3945 /* Returns the _DECL for a library function with C linkage.
3946 We assume that such functions never throw; if this is incorrect,
3947 callers should unset TREE_NOTHROW. */
3950 build_library_fn (tree name
, tree type
)
3952 tree fn
= build_library_fn_1 (name
, ERROR_MARK
, type
);
3953 TREE_NOTHROW (fn
) = 1;
3957 /* Returns the _DECL for a library function with C++ linkage. */
3960 build_cp_library_fn (tree name
, enum tree_code operator_code
, tree type
)
3962 tree fn
= build_library_fn_1 (name
, operator_code
, type
);
3963 TREE_NOTHROW (fn
) = TYPE_NOTHROW_P (type
);
3964 DECL_CONTEXT (fn
) = FROB_CONTEXT (current_namespace
);
3965 SET_DECL_LANGUAGE (fn
, lang_cplusplus
);
3969 /* Like build_library_fn, but takes a C string instead of an
3973 build_library_fn_ptr (const char* name
, tree type
)
3975 return build_library_fn (get_identifier (name
), type
);
3978 /* Like build_cp_library_fn, but takes a C string instead of an
3982 build_cp_library_fn_ptr (const char* name
, tree type
)
3984 return build_cp_library_fn (get_identifier (name
), ERROR_MARK
, type
);
3987 /* Like build_library_fn, but also pushes the function so that we will
3988 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3989 may throw exceptions listed in RAISES. */
3992 push_library_fn (tree name
, tree type
, tree raises
)
3997 type
= build_exception_variant (type
, raises
);
3999 fn
= build_library_fn (name
, type
);
4000 pushdecl_top_level (fn
);
4004 /* Like build_cp_library_fn, but also pushes the function so that it
4005 will be found by normal lookup. */
4008 push_cp_library_fn (enum tree_code operator_code
, tree type
)
4010 tree fn
= build_cp_library_fn (ansi_opname (operator_code
),
4015 apply_tm_attr (fn
, get_identifier ("transaction_safe"));
4019 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
4023 push_void_library_fn (tree name
, tree parmtypes
)
4025 tree type
= build_function_type (void_type_node
, parmtypes
);
4026 return push_library_fn (name
, type
, NULL_TREE
);
4029 /* Like push_library_fn, but also note that this function throws
4030 and does not return. Used for __throw_foo and the like. */
4033 push_throw_library_fn (tree name
, tree type
)
4035 tree fn
= push_library_fn (name
, type
, NULL_TREE
);
4036 TREE_THIS_VOLATILE (fn
) = 1;
4037 TREE_NOTHROW (fn
) = 0;
4041 /* When we call finish_struct for an anonymous union, we create
4042 default copy constructors and such. But, an anonymous union
4043 shouldn't have such things; this function undoes the damage to the
4044 anonymous union type T.
4046 (The reason that we create the synthesized methods is that we don't
4047 distinguish `union { int i; }' from `typedef union { int i; } U'.
4048 The first is an anonymous union; the second is just an ordinary
4052 fixup_anonymous_aggr (tree t
)
4056 /* Wipe out memory of synthesized methods. */
4057 TYPE_HAS_USER_CONSTRUCTOR (t
) = 0;
4058 TYPE_HAS_DEFAULT_CONSTRUCTOR (t
) = 0;
4059 TYPE_HAS_COPY_CTOR (t
) = 0;
4060 TYPE_HAS_CONST_COPY_CTOR (t
) = 0;
4061 TYPE_HAS_COPY_ASSIGN (t
) = 0;
4062 TYPE_HAS_CONST_COPY_ASSIGN (t
) = 0;
4064 /* Splice the implicitly generated functions out of the TYPE_METHODS
4066 q
= &TYPE_METHODS (t
);
4069 if (DECL_ARTIFICIAL (*q
))
4070 *q
= TREE_CHAIN (*q
);
4072 q
= &DECL_CHAIN (*q
);
4075 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
4076 if (TYPE_METHODS (t
))
4078 tree decl
= TYPE_MAIN_DECL (t
);
4080 if (TREE_CODE (t
) != UNION_TYPE
)
4081 error_at (DECL_SOURCE_LOCATION (decl
),
4082 "an anonymous struct cannot have function members");
4084 error_at (DECL_SOURCE_LOCATION (decl
),
4085 "an anonymous union cannot have function members");
4088 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4089 assignment operators (because they cannot have these methods themselves).
4090 For anonymous unions this is already checked because they are not allowed
4091 in any union, otherwise we have to check it. */
4092 if (TREE_CODE (t
) != UNION_TYPE
)
4096 for (field
= TYPE_FIELDS (t
); field
; field
= DECL_CHAIN (field
))
4097 if (TREE_CODE (field
) == FIELD_DECL
)
4099 type
= TREE_TYPE (field
);
4100 if (CLASS_TYPE_P (type
))
4102 if (TYPE_NEEDS_CONSTRUCTING (type
))
4103 error ("member %q+#D with constructor not allowed "
4104 "in anonymous aggregate", field
);
4105 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
4106 error ("member %q+#D with destructor not allowed "
4107 "in anonymous aggregate", field
);
4108 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type
))
4109 error ("member %q+#D with copy assignment operator "
4110 "not allowed in anonymous aggregate", field
);
4116 /* Make sure that a declaration with no declarator is well-formed, i.e.
4117 just declares a tagged type or anonymous union.
4119 Returns the type declared; or NULL_TREE if none. */
4122 check_tag_decl (cp_decl_specifier_seq
*declspecs
)
4124 int saw_friend
= declspecs
->specs
[(int)ds_friend
] != 0;
4125 int saw_typedef
= declspecs
->specs
[(int)ds_typedef
] != 0;
4126 /* If a class, struct, or enum type is declared by the DECLSPECS
4127 (i.e, if a class-specifier, enum-specifier, or non-typename
4128 elaborated-type-specifier appears in the DECLSPECS),
4129 DECLARED_TYPE is set to the corresponding type. */
4130 tree declared_type
= NULL_TREE
;
4131 bool error_p
= false;
4133 if (declspecs
->multiple_types_p
)
4134 error ("multiple types in one declaration");
4135 else if (declspecs
->redefined_builtin_type
)
4137 if (!in_system_header
)
4138 permerror (input_location
, "redeclaration of C++ built-in type %qT",
4139 declspecs
->redefined_builtin_type
);
4144 && TYPE_P (declspecs
->type
)
4145 && ((TREE_CODE (declspecs
->type
) != TYPENAME_TYPE
4146 && MAYBE_CLASS_TYPE_P (declspecs
->type
))
4147 || TREE_CODE (declspecs
->type
) == ENUMERAL_TYPE
))
4148 declared_type
= declspecs
->type
;
4149 else if (declspecs
->type
== error_mark_node
)
4151 if (declared_type
== NULL_TREE
&& ! saw_friend
&& !error_p
)
4152 permerror (input_location
, "declaration does not declare anything");
4153 else if (declared_type
!= NULL_TREE
&& type_uses_auto (declared_type
))
4155 error ("%<auto%> can only be specified for variables "
4156 "or function declarations");
4157 return error_mark_node
;
4159 /* Check for an anonymous union. */
4160 else if (declared_type
&& RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type
))
4161 && TYPE_ANONYMOUS_P (declared_type
))
4163 /* 7/3 In a simple-declaration, the optional init-declarator-list
4164 can be omitted only when declaring a class (clause 9) or
4165 enumeration (7.2), that is, when the decl-specifier-seq contains
4166 either a class-specifier, an elaborated-type-specifier with
4167 a class-key (9.1), or an enum-specifier. In these cases and
4168 whenever a class-specifier or enum-specifier is present in the
4169 decl-specifier-seq, the identifiers in these specifiers are among
4170 the names being declared by the declaration (as class-name,
4171 enum-names, or enumerators, depending on the syntax). In such
4172 cases, and except for the declaration of an unnamed bit-field (9.6),
4173 the decl-specifier-seq shall introduce one or more names into the
4174 program, or shall redeclare a name introduced by a previous
4175 declaration. [Example:
4176 enum { }; // ill-formed
4177 typedef class { }; // ill-formed
4181 error ("missing type-name in typedef-declaration");
4184 /* Anonymous unions are objects, so they can have specifiers. */;
4185 SET_ANON_AGGR_TYPE_P (declared_type
);
4187 if (TREE_CODE (declared_type
) != UNION_TYPE
&& !in_system_header
)
4188 pedwarn (input_location
, OPT_pedantic
, "ISO C++ prohibits anonymous structs");
4193 if (declspecs
->specs
[(int)ds_inline
]
4194 || declspecs
->specs
[(int)ds_virtual
])
4195 error ("%qs can only be specified for functions",
4196 declspecs
->specs
[(int)ds_inline
]
4197 ? "inline" : "virtual");
4199 && (!current_class_type
4200 || current_scope () != current_class_type
))
4201 error ("%<friend%> can only be specified inside a class");
4202 else if (declspecs
->specs
[(int)ds_explicit
])
4203 error ("%<explicit%> can only be specified for constructors");
4204 else if (declspecs
->storage_class
)
4205 error ("a storage class can only be specified for objects "
4207 else if (declspecs
->specs
[(int)ds_const
]
4208 || declspecs
->specs
[(int)ds_volatile
]
4209 || declspecs
->specs
[(int)ds_restrict
]
4210 || declspecs
->specs
[(int)ds_thread
])
4211 error ("qualifiers can only be specified for objects "
4213 else if (saw_typedef
)
4214 warning (0, "%<typedef%> was ignored in this declaration");
4215 else if (declspecs
->specs
[(int) ds_constexpr
])
4216 error ("%<constexpr%> cannot be used for type declarations");
4219 if (declspecs
->attributes
&& warn_attributes
)
4222 if (!CLASSTYPE_TEMPLATE_INSTANTIATION (declared_type
))
4223 /* For a non-template class, use the name location. */
4224 loc
= location_of (declared_type
);
4226 /* For a template class (an explicit instantiation), use the
4227 current location. */
4228 loc
= input_location
;
4229 warning_at (loc
, OPT_Wattributes
, "attribute ignored in declaration "
4230 "of %q#T", declared_type
);
4231 inform (loc
, "attribute for %q#T must follow the %qs keyword",
4232 declared_type
, class_key_or_enum_as_string (declared_type
));
4235 return declared_type
;
4238 /* Called when a declaration is seen that contains no names to declare.
4239 If its type is a reference to a structure, union or enum inherited
4240 from a containing scope, shadow that tag name for the current scope
4241 with a forward reference.
4242 If its type defines a new named structure or union
4243 or defines an enum, it is valid but we need not do anything here.
4244 Otherwise, it is an error.
4246 C++: may have to grok the declspecs to learn about static,
4247 complain for anonymous unions.
4249 Returns the TYPE declared -- or NULL_TREE if none. */
4252 shadow_tag (cp_decl_specifier_seq
*declspecs
)
4254 tree t
= check_tag_decl (declspecs
);
4259 if (maybe_process_partial_specialization (t
) == error_mark_node
)
4262 /* This is where the variables in an anonymous union are
4263 declared. An anonymous union declaration looks like:
4265 because there is no declarator after the union, the parser
4266 sends that declaration here. */
4267 if (ANON_AGGR_TYPE_P (t
))
4269 fixup_anonymous_aggr (t
);
4271 if (TYPE_FIELDS (t
))
4273 tree decl
= grokdeclarator (/*declarator=*/NULL
,
4274 declspecs
, NORMAL
, 0, NULL
);
4275 finish_anon_union (decl
);
4282 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4285 groktypename (cp_decl_specifier_seq
*type_specifiers
,
4286 const cp_declarator
*declarator
,
4287 bool is_template_arg
)
4291 enum decl_context context
4292 = is_template_arg
? TEMPLATE_TYPE_ARG
: TYPENAME
;
4293 attrs
= type_specifiers
->attributes
;
4294 type_specifiers
->attributes
= NULL_TREE
;
4295 type
= grokdeclarator (declarator
, type_specifiers
, context
, 0, &attrs
);
4296 if (attrs
&& type
!= error_mark_node
)
4298 if (CLASS_TYPE_P (type
))
4299 warning (OPT_Wattributes
, "ignoring attributes applied to class type %qT "
4300 "outside of definition", type
);
4301 else if (MAYBE_CLASS_TYPE_P (type
))
4302 /* A template type parameter or other dependent type. */
4303 warning (OPT_Wattributes
, "ignoring attributes applied to dependent "
4304 "type %qT without an associated declaration", type
);
4306 cplus_decl_attributes (&type
, attrs
, 0);
4311 /* Process a DECLARATOR for a function-scope variable declaration,
4312 namespace-scope variable declaration, or function declaration.
4313 (Function definitions go through start_function; class member
4314 declarations appearing in the body of the class go through
4315 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4316 If an error occurs, the error_mark_node is returned instead.
4318 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4319 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4320 for an explicitly defaulted function, or SD_DELETED for an explicitly
4321 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4322 implicitly initialized via a default constructor. ATTRIBUTES and
4323 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4325 The scope represented by the context of the returned DECL is pushed
4326 (if it is not the global namespace) and is assigned to
4327 *PUSHED_SCOPE_P. The caller is then responsible for calling
4328 pop_scope on *PUSHED_SCOPE_P if it is set. */
4331 start_decl (const cp_declarator
*declarator
,
4332 cp_decl_specifier_seq
*declspecs
,
4335 tree prefix_attributes
,
4336 tree
*pushed_scope_p
)
4344 *pushed_scope_p
= NULL_TREE
;
4346 /* An object declared as __attribute__((deprecated)) suppresses
4347 warnings of uses of other deprecated items. */
4348 if (lookup_attribute ("deprecated", attributes
))
4349 deprecated_state
= DEPRECATED_SUPPRESS
;
4351 attributes
= chainon (attributes
, prefix_attributes
);
4353 decl
= grokdeclarator (declarator
, declspecs
, NORMAL
, initialized
,
4356 deprecated_state
= DEPRECATED_NORMAL
;
4358 if (decl
== NULL_TREE
|| TREE_CODE (decl
) == VOID_TYPE
4359 || decl
== error_mark_node
)
4360 return error_mark_node
;
4362 context
= CP_DECL_CONTEXT (decl
);
4363 if (context
!= global_namespace
)
4364 *pushed_scope_p
= push_scope (context
);
4367 /* Is it valid for this decl to have an initializer at all?
4368 If not, set INITIALIZED to zero, which will indirectly
4369 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4370 switch (TREE_CODE (decl
))
4373 error ("typedef %qD is initialized (use decltype instead)", decl
);
4374 return error_mark_node
;
4377 if (initialized
== SD_DELETED
)
4378 /* We'll handle the rest of the semantics later, but we need to
4379 set this now so it's visible to duplicate_decls. */
4380 DECL_DELETED_FN (decl
) = 1;
4389 if (! toplevel_bindings_p ()
4390 && DECL_EXTERNAL (decl
))
4391 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4393 DECL_EXTERNAL (decl
) = 0;
4394 if (toplevel_bindings_p ())
4395 TREE_STATIC (decl
) = 1;
4397 alias
= lookup_attribute ("alias", DECL_ATTRIBUTES (decl
)) != 0;
4399 if (alias
&& TREE_CODE (decl
) == FUNCTION_DECL
)
4400 record_key_method_defined (decl
);
4402 /* If this is a typedef that names the class for linkage purposes
4403 (7.1.3p8), apply any attributes directly to the type. */
4404 if (TREE_CODE (decl
) == TYPE_DECL
4405 && TAGGED_TYPE_P (TREE_TYPE (decl
))
4406 && decl
== TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl
))))
4407 flags
= ATTR_FLAG_TYPE_IN_PLACE
;
4411 /* Set attributes here so if duplicate decl, will have proper attributes. */
4412 cplus_decl_attributes (&decl
, attributes
, flags
);
4414 /* Dllimported symbols cannot be defined. Static data members (which
4415 can be initialized in-class and dllimported) go through grokfield,
4416 not here, so we don't need to exclude those decls when checking for
4418 if (initialized
&& DECL_DLLIMPORT_P (decl
))
4420 error ("definition of %q#D is marked %<dllimport%>", decl
);
4421 DECL_DLLIMPORT_P (decl
) = 0;
4424 /* If #pragma weak was used, mark the decl weak now. */
4425 maybe_apply_pragma_weak (decl
);
4427 if (TREE_CODE (decl
) == FUNCTION_DECL
4428 && DECL_DECLARED_INLINE_P (decl
)
4429 && DECL_UNINLINABLE (decl
)
4430 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl
)))
4431 warning (0, "inline function %q+D given attribute noinline", decl
);
4433 if (TYPE_P (context
) && COMPLETE_TYPE_P (complete_type (context
)))
4435 if (TREE_CODE (decl
) == VAR_DECL
)
4437 tree field
= lookup_field (context
, DECL_NAME (decl
), 0, false);
4438 if (field
== NULL_TREE
|| TREE_CODE (field
) != VAR_DECL
)
4439 error ("%q#D is not a static member of %q#T", decl
, context
);
4442 if (DECL_CONTEXT (field
) != context
)
4444 if (!same_type_p (DECL_CONTEXT (field
), context
))
4445 permerror (input_location
, "ISO C++ does not permit %<%T::%D%> "
4446 "to be defined as %<%T::%D%>",
4447 DECL_CONTEXT (field
), DECL_NAME (decl
),
4448 context
, DECL_NAME (decl
));
4449 DECL_CONTEXT (decl
) = DECL_CONTEXT (field
);
4451 if (processing_specialization
4452 && template_class_depth (context
) == 0
4453 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context
))
4454 error ("template header not allowed in member definition "
4455 "of explicitly specialized class");
4456 /* Static data member are tricky; an in-class initialization
4457 still doesn't provide a definition, so the in-class
4458 declaration will have DECL_EXTERNAL set, but will have an
4459 initialization. Thus, duplicate_decls won't warn
4460 about this situation, and so we check here. */
4461 if (initialized
&& DECL_INITIALIZED_IN_CLASS_P (field
))
4462 error ("duplicate initialization of %qD", decl
);
4463 if (duplicate_decls (decl
, field
, /*newdecl_is_friend=*/false))
4465 if (declspecs
->specs
[(int) ds_constexpr
]
4466 && !DECL_DECLARED_CONSTEXPR_P (field
))
4467 error ("%qD declared %<constexpr%> outside its class", field
);
4472 tree field
= check_classfn (context
, decl
,
4473 (processing_template_decl
4474 > template_class_depth (context
))
4475 ? current_template_parms
4477 if (field
&& field
!= error_mark_node
4478 && duplicate_decls (decl
, field
,
4479 /*newdecl_is_friend=*/false))
4483 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4484 DECL_IN_AGGR_P (decl
) = 0;
4485 /* Do not mark DECL as an explicit specialization if it was not
4486 already marked as an instantiation; a declaration should
4487 never be marked as a specialization unless we know what
4488 template is being specialized. */
4489 if (DECL_LANG_SPECIFIC (decl
) && DECL_USE_TEMPLATE (decl
))
4491 SET_DECL_TEMPLATE_SPECIALIZATION (decl
);
4493 /* [temp.expl.spec] An explicit specialization of a static data
4494 member of a template is a definition if the declaration
4495 includes an initializer; otherwise, it is a declaration.
4497 We check for processing_specialization so this only applies
4498 to the new specialization syntax. */
4499 if (!initialized
&& processing_specialization
)
4500 DECL_EXTERNAL (decl
) = 1;
4503 if (DECL_EXTERNAL (decl
) && ! DECL_TEMPLATE_SPECIALIZATION (decl
)
4504 /* Aliases are definitions. */
4506 permerror (input_location
, "declaration of %q#D outside of class is not definition",
4510 was_public
= TREE_PUBLIC (decl
);
4512 /* Enter this declaration into the symbol table. */
4513 decl
= maybe_push_decl (decl
);
4515 if (processing_template_decl
)
4516 decl
= push_template_decl (decl
);
4517 if (decl
== error_mark_node
)
4518 return error_mark_node
;
4520 /* Tell the back end to use or not use .common as appropriate. If we say
4521 -fconserve-space, we want this to save .data space, at the expense of
4522 wrong semantics. If we say -fno-conserve-space, we want this to
4523 produce errors about redefs; to do this we force variables into the
4525 if (flag_conserve_space
4526 && TREE_CODE (decl
) == VAR_DECL
4527 && TREE_PUBLIC (decl
)
4528 && !DECL_THREAD_LOCAL_P (decl
)
4529 && !have_global_bss_p ())
4530 DECL_COMMON (decl
) = 1;
4532 if (TREE_CODE (decl
) == VAR_DECL
4533 && DECL_NAMESPACE_SCOPE_P (decl
) && !TREE_PUBLIC (decl
) && !was_public
4534 && !DECL_THIS_STATIC (decl
) && !DECL_ARTIFICIAL (decl
))
4536 /* This is a const variable with implicit 'static'. Set
4537 DECL_THIS_STATIC so we can tell it from variables that are
4538 !TREE_PUBLIC because of the anonymous namespace. */
4539 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl
)) || errorcount
);
4540 DECL_THIS_STATIC (decl
) = 1;
4543 if (!processing_template_decl
&& TREE_CODE (decl
) == VAR_DECL
)
4544 start_decl_1 (decl
, initialized
);
4549 /* Process the declaration of a variable DECL. INITIALIZED is true
4550 iff DECL is explicitly initialized. (INITIALIZED is false if the
4551 variable is initialized via an implicitly-called constructor.)
4552 This function must be called for ordinary variables (including, for
4553 example, implicit instantiations of templates), but must not be
4554 called for template declarations. */
4557 start_decl_1 (tree decl
, bool initialized
)
4561 bool aggregate_definition_p
;
4563 gcc_assert (!processing_template_decl
);
4565 if (error_operand_p (decl
))
4568 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
4570 type
= TREE_TYPE (decl
);
4571 complete_p
= COMPLETE_TYPE_P (type
);
4572 aggregate_definition_p
= MAYBE_CLASS_TYPE_P (type
) && !DECL_EXTERNAL (decl
);
4574 /* If an explicit initializer is present, or if this is a definition
4575 of an aggregate, then we need a complete type at this point.
4576 (Scalars are always complete types, so there is nothing to
4577 check.) This code just sets COMPLETE_P; errors (if necessary)
4578 are issued below. */
4579 if ((initialized
|| aggregate_definition_p
)
4581 && COMPLETE_TYPE_P (complete_type (type
)))
4584 /* We will not yet have set TREE_READONLY on DECL if the type
4585 was "const", but incomplete, before this point. But, now, we
4586 have a complete type, so we can try again. */
4587 cp_apply_type_quals_to_decl (cp_type_quals (type
), decl
);
4591 /* Is it valid for this decl to have an initializer at all? */
4593 /* Don't allow initializations for incomplete types except for
4594 arrays which might be completed by the initialization. */
4596 ; /* A complete type is ok. */
4597 else if (type_uses_auto (type
))
4598 ; /* An auto type is ok. */
4599 else if (TREE_CODE (type
) != ARRAY_TYPE
)
4601 error ("variable %q#D has initializer but incomplete type", decl
);
4602 type
= TREE_TYPE (decl
) = error_mark_node
;
4604 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type
))))
4606 if (DECL_LANG_SPECIFIC (decl
) && DECL_TEMPLATE_INFO (decl
))
4607 error ("elements of array %q#D have incomplete type", decl
);
4608 /* else we already gave an error in start_decl. */
4611 else if (aggregate_definition_p
&& !complete_p
)
4613 if (type_uses_auto (type
))
4614 error ("declaration of %q#D has no initializer", decl
);
4616 error ("aggregate %q#D has incomplete type and cannot be defined",
4618 /* Change the type so that assemble_variable will give
4619 DECL an rtl we can live with: (mem (const_int 0)). */
4620 type
= TREE_TYPE (decl
) = error_mark_node
;
4623 /* Create a new scope to hold this declaration if necessary.
4624 Whether or not a new scope is necessary cannot be determined
4625 until after the type has been completed; if the type is a
4626 specialization of a class template it is not until after
4627 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4628 will be set correctly. */
4629 maybe_push_cleanup_level (type
);
4632 /* Handle initialization of references. DECL, TYPE, and INIT have the
4633 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4634 but will be set to a new CLEANUP_STMT if a temporary is created
4635 that must be destroyed subsequently.
4637 Returns an initializer expression to use to initialize DECL, or
4638 NULL if the initialization can be performed statically.
4640 Quotes on semantics can be found in ARM 8.4.3. */
4643 grok_reference_init (tree decl
, tree type
, tree init
, int flags
)
4645 if (init
== NULL_TREE
)
4647 if ((DECL_LANG_SPECIFIC (decl
) == 0
4648 || DECL_IN_AGGR_P (decl
) == 0)
4649 && ! DECL_THIS_EXTERN (decl
))
4650 error ("%qD declared as reference but not initialized", decl
);
4654 if (TREE_CODE (init
) == TREE_LIST
)
4655 init
= build_x_compound_expr_from_list (init
, ELK_INIT
,
4656 tf_warning_or_error
);
4658 if (TREE_CODE (TREE_TYPE (type
)) != ARRAY_TYPE
4659 && TREE_CODE (TREE_TYPE (init
)) == ARRAY_TYPE
)
4660 /* Note: default conversion is only called in very special cases. */
4661 init
= decay_conversion (init
);
4663 /* Convert INIT to the reference type TYPE. This may involve the
4664 creation of a temporary, whose lifetime must be the same as that
4665 of the reference. If so, a DECL_EXPR for the temporary will be
4666 added just after the DECL_EXPR for DECL. That's why we don't set
4667 DECL_INITIAL for local references (instead assigning to them
4668 explicitly); we need to allow the temporary to be initialized
4670 return initialize_reference (type
, init
, flags
,
4671 tf_warning_or_error
);
4674 /* Designated initializers in arrays are not supported in GNU C++.
4675 The parser cannot detect this error since it does not know whether
4676 a given brace-enclosed initializer is for a class type or for an
4677 array. This function checks that CE does not use a designated
4678 initializer. If it does, an error is issued. Returns true if CE
4679 is valid, i.e., does not have a designated initializer. */
4682 check_array_designated_initializer (const constructor_elt
*ce
,
4683 unsigned HOST_WIDE_INT index
)
4685 /* Designated initializers for array elements are not supported. */
4688 /* The parser only allows identifiers as designated
4690 if (ce
->index
== error_mark_node
)
4691 error ("name used in a GNU-style designated "
4692 "initializer for an array");
4693 else if (TREE_CODE (ce
->index
) == INTEGER_CST
)
4695 /* A C99 designator is OK if it matches the current index. */
4696 if (TREE_INT_CST_LOW (ce
->index
) == index
)
4699 sorry ("non-trivial designated initializers not supported");
4703 gcc_assert (TREE_CODE (ce
->index
) == IDENTIFIER_NODE
);
4704 error ("name %qD used in a GNU-style designated "
4705 "initializer for an array", ce
->index
);
4713 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4714 array until we finish parsing the initializer. If that's the
4715 situation we're in, update DECL accordingly. */
4718 maybe_deduce_size_from_array_init (tree decl
, tree init
)
4720 tree type
= TREE_TYPE (decl
);
4722 if (TREE_CODE (type
) == ARRAY_TYPE
4723 && TYPE_DOMAIN (type
) == NULL_TREE
4724 && TREE_CODE (decl
) != TYPE_DECL
)
4726 /* do_default is really a C-ism to deal with tentative definitions.
4727 But let's leave it here to ease the eventual merge. */
4728 int do_default
= !DECL_EXTERNAL (decl
);
4729 tree initializer
= init
? init
: DECL_INITIAL (decl
);
4732 /* Check that there are no designated initializers in INIT, as
4733 those are not supported in GNU C++, and as the middle-end
4734 will crash if presented with a non-numeric designated
4736 if (initializer
&& TREE_CODE (initializer
) == CONSTRUCTOR
)
4738 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initializer
);
4739 constructor_elt
*ce
;
4741 FOR_EACH_VEC_ELT (constructor_elt
, v
, i
, ce
)
4742 if (!check_array_designated_initializer (ce
, i
))
4748 failure
= cp_complete_array_type (&TREE_TYPE (decl
), initializer
,
4752 error ("initializer fails to determine size of %qD", decl
);
4753 TREE_TYPE (decl
) = error_mark_node
;
4755 else if (failure
== 2)
4759 error ("array size missing in %qD", decl
);
4760 TREE_TYPE (decl
) = error_mark_node
;
4762 /* If a `static' var's size isn't known, make it extern as
4763 well as static, so it does not get allocated. If it's not
4764 `static', then don't mark it extern; finish_incomplete_decl
4765 will give it a default size and it will get allocated. */
4766 else if (!pedantic
&& TREE_STATIC (decl
) && !TREE_PUBLIC (decl
))
4767 DECL_EXTERNAL (decl
) = 1;
4769 else if (failure
== 3)
4771 error ("zero-size array %qD", decl
);
4772 TREE_TYPE (decl
) = error_mark_node
;
4776 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl
)), decl
);
4778 relayout_decl (decl
);
4782 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4783 any appropriate error messages regarding the layout. */
4786 layout_var_decl (tree decl
)
4790 type
= TREE_TYPE (decl
);
4791 if (type
== error_mark_node
)
4794 /* If we haven't already layed out this declaration, do so now.
4795 Note that we must not call complete type for an external object
4796 because it's type might involve templates that we are not
4797 supposed to instantiate yet. (And it's perfectly valid to say
4798 `extern X x' for some incomplete type `X'.) */
4799 if (!DECL_EXTERNAL (decl
))
4800 complete_type (type
);
4801 if (!DECL_SIZE (decl
)
4802 && TREE_TYPE (decl
) != error_mark_node
4803 && (COMPLETE_TYPE_P (type
)
4804 || (TREE_CODE (type
) == ARRAY_TYPE
4805 && !TYPE_DOMAIN (type
)
4806 && COMPLETE_TYPE_P (TREE_TYPE (type
)))))
4807 layout_decl (decl
, 0);
4809 if (!DECL_EXTERNAL (decl
) && DECL_SIZE (decl
) == NULL_TREE
)
4811 /* An automatic variable with an incomplete type: that is an error.
4812 Don't talk about array types here, since we took care of that
4813 message in grokdeclarator. */
4814 error ("storage size of %qD isn%'t known", decl
);
4815 TREE_TYPE (decl
) = error_mark_node
;
4818 /* Keep this code around in case we later want to control debug info
4819 based on whether a type is "used". (jason 1999-11-11) */
4821 else if (!DECL_EXTERNAL (decl
) && MAYBE_CLASS_TYPE_P (ttype
))
4822 /* Let debugger know it should output info for this type. */
4823 note_debug_info_needed (ttype
);
4825 if (TREE_STATIC (decl
) && DECL_CLASS_SCOPE_P (decl
))
4826 note_debug_info_needed (DECL_CONTEXT (decl
));
4829 if ((DECL_EXTERNAL (decl
) || TREE_STATIC (decl
))
4830 && DECL_SIZE (decl
) != NULL_TREE
4831 && ! TREE_CONSTANT (DECL_SIZE (decl
)))
4833 if (TREE_CODE (DECL_SIZE (decl
)) == INTEGER_CST
)
4834 constant_expression_warning (DECL_SIZE (decl
));
4837 error ("storage size of %qD isn%'t constant", decl
);
4838 TREE_TYPE (decl
) = error_mark_node
;
4843 /* If a local static variable is declared in an inline function, or if
4844 we have a weak definition, we must endeavor to create only one
4845 instance of the variable at link-time. */
4848 maybe_commonize_var (tree decl
)
4850 /* Static data in a function with comdat linkage also has comdat
4852 if (TREE_STATIC (decl
)
4853 /* Don't mess with __FUNCTION__. */
4854 && ! DECL_ARTIFICIAL (decl
)
4855 && DECL_FUNCTION_SCOPE_P (decl
)
4856 && vague_linkage_p (DECL_CONTEXT (decl
)))
4860 /* With weak symbols, we simply make the variable COMDAT;
4861 that will cause copies in multiple translations units to
4863 comdat_linkage (decl
);
4867 if (DECL_INITIAL (decl
) == NULL_TREE
4868 || DECL_INITIAL (decl
) == error_mark_node
)
4870 /* Without weak symbols, we can use COMMON to merge
4871 uninitialized variables. */
4872 TREE_PUBLIC (decl
) = 1;
4873 DECL_COMMON (decl
) = 1;
4877 /* While for initialized variables, we must use internal
4878 linkage -- which means that multiple copies will not
4880 TREE_PUBLIC (decl
) = 0;
4881 DECL_COMMON (decl
) = 0;
4882 warning_at (input_location
, 0,
4883 "sorry: semantics of inline function static "
4884 "data %q+#D are wrong (you%'ll wind up "
4885 "with multiple copies)", decl
);
4886 warning_at (DECL_SOURCE_LOCATION (decl
), 0,
4887 " you can work around this by removing "
4892 else if (DECL_LANG_SPECIFIC (decl
) && DECL_COMDAT (decl
))
4893 /* Set it up again; we might have set DECL_INITIAL since the last
4895 comdat_linkage (decl
);
4898 /* Issue an error message if DECL is an uninitialized const variable. */
4901 check_for_uninitialized_const_var (tree decl
)
4903 tree type
= strip_array_types (TREE_TYPE (decl
));
4905 /* ``Unless explicitly declared extern, a const object does not have
4906 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4908 if (TREE_CODE (decl
) == VAR_DECL
4909 && TREE_CODE (type
) != REFERENCE_TYPE
4910 && CP_TYPE_CONST_P (type
)
4911 && !DECL_INITIAL (decl
))
4913 tree field
= default_init_uninitialized_part (type
);
4917 permerror (DECL_SOURCE_LOCATION (decl
),
4918 "uninitialized const %qD", decl
);
4920 if (CLASS_TYPE_P (type
))
4922 tree defaulted_ctor
;
4924 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type
)),
4925 "%q#T has no user-provided default constructor", type
);
4926 defaulted_ctor
= in_class_defaulted_default_constructor (type
);
4928 inform (DECL_SOURCE_LOCATION (defaulted_ctor
),
4929 "constructor is not user-provided because it is "
4930 "explicitly defaulted in the class body");
4931 inform (0, "and the implicitly-defined constructor does not "
4932 "initialize %q+#D", field
);
4937 /* Structure holding the current initializer being processed by reshape_init.
4938 CUR is a pointer to the current element being processed, END is a pointer
4939 after the last element present in the initializer. */
4940 typedef struct reshape_iterator_t
4942 constructor_elt
*cur
;
4943 constructor_elt
*end
;
4946 static tree
reshape_init_r (tree
, reshape_iter
*, bool, tsubst_flags_t
);
4948 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4949 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4950 initialized. If there are no more such fields, the return value
4954 next_initializable_field (tree field
)
4957 && (TREE_CODE (field
) != FIELD_DECL
4958 || (DECL_C_BIT_FIELD (field
) && !DECL_NAME (field
))
4959 || DECL_ARTIFICIAL (field
)))
4960 field
= DECL_CHAIN (field
);
4965 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4966 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4967 INTEGER_CST representing the size of the array minus one (the maximum index),
4968 or NULL_TREE if the array was declared without specifying the size. D is
4969 the iterator within the constructor. */
4972 reshape_init_array_1 (tree elt_type
, tree max_index
, reshape_iter
*d
,
4973 tsubst_flags_t complain
)
4976 bool sized_array_p
= (max_index
!= NULL_TREE
);
4977 unsigned HOST_WIDE_INT max_index_cst
= 0;
4978 unsigned HOST_WIDE_INT index
;
4980 /* The initializer for an array is always a CONSTRUCTOR. */
4981 new_init
= build_constructor (init_list_type_node
, NULL
);
4985 /* Minus 1 is used for zero sized arrays. */
4986 if (integer_all_onesp (max_index
))
4989 if (host_integerp (max_index
, 1))
4990 max_index_cst
= tree_low_cst (max_index
, 1);
4991 /* sizetype is sign extended, not zero extended. */
4993 max_index_cst
= tree_low_cst (fold_convert (size_type_node
, max_index
),
4997 /* Loop until there are no more initializers. */
4999 d
->cur
!= d
->end
&& (!sized_array_p
|| index
<= max_index_cst
);
5004 check_array_designated_initializer (d
->cur
, index
);
5005 elt_init
= reshape_init_r (elt_type
, d
, /*first_initializer_p=*/false,
5007 if (elt_init
== error_mark_node
)
5008 return error_mark_node
;
5009 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
),
5010 size_int (index
), elt_init
);
5011 if (!TREE_CONSTANT (elt_init
))
5012 TREE_CONSTANT (new_init
) = false;
5018 /* Subroutine of reshape_init_r, processes the initializers for arrays.
5019 Parameters are the same of reshape_init_r. */
5022 reshape_init_array (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5024 tree max_index
= NULL_TREE
;
5026 gcc_assert (TREE_CODE (type
) == ARRAY_TYPE
);
5028 if (TYPE_DOMAIN (type
))
5029 max_index
= array_type_nelts (type
);
5031 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5034 /* Subroutine of reshape_init_r, processes the initializers for vectors.
5035 Parameters are the same of reshape_init_r. */
5038 reshape_init_vector (tree type
, reshape_iter
*d
, tsubst_flags_t complain
)
5040 tree max_index
= NULL_TREE
;
5042 gcc_assert (TREE_CODE (type
) == VECTOR_TYPE
);
5044 if (COMPOUND_LITERAL_P (d
->cur
->value
))
5046 tree value
= d
->cur
->value
;
5047 if (!same_type_p (TREE_TYPE (value
), type
))
5049 if (complain
& tf_error
)
5050 error ("invalid type %qT as initializer for a vector of type %qT",
5051 TREE_TYPE (d
->cur
->value
), type
);
5052 value
= error_mark_node
;
5058 /* For a vector, we initialize it as an array of the appropriate size. */
5059 if (TREE_CODE (type
) == VECTOR_TYPE
)
5060 max_index
= size_int (TYPE_VECTOR_SUBPARTS (type
) - 1);
5062 return reshape_init_array_1 (TREE_TYPE (type
), max_index
, d
, complain
);
5065 /* Subroutine of reshape_init_r, processes the initializers for classes
5066 or union. Parameters are the same of reshape_init_r. */
5069 reshape_init_class (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5070 tsubst_flags_t complain
)
5075 gcc_assert (CLASS_TYPE_P (type
));
5077 /* The initializer for a class is always a CONSTRUCTOR. */
5078 new_init
= build_constructor (init_list_type_node
, NULL
);
5079 field
= next_initializable_field (TYPE_FIELDS (type
));
5085 An initializer for an aggregate member that is an
5086 empty class shall have the form of an empty
5087 initializer-list {}. */
5088 if (!first_initializer_p
)
5090 if (complain
& tf_error
)
5091 error ("initializer for %qT must be brace-enclosed", type
);
5092 return error_mark_node
;
5097 /* Loop through the initializable fields, gathering initializers. */
5098 while (d
->cur
!= d
->end
)
5102 /* Handle designated initializers, as an extension. */
5105 if (TREE_CODE (d
->cur
->index
) == INTEGER_CST
)
5107 if (complain
& tf_error
)
5108 error ("%<[%E] =%> used in a GNU-style designated initializer"
5109 " for class %qT", d
->cur
->index
, type
);
5110 return error_mark_node
;
5113 field
= lookup_field_1 (type
, d
->cur
->index
, /*want_type=*/false);
5115 if (!field
|| TREE_CODE (field
) != FIELD_DECL
)
5117 if (complain
& tf_error
)
5118 error ("%qT has no non-static data member named %qD", type
,
5120 return error_mark_node
;
5124 /* If we processed all the member of the class, we are done. */
5128 field_init
= reshape_init_r (TREE_TYPE (field
), d
,
5129 /*first_initializer_p=*/false, complain
);
5130 if (field_init
== error_mark_node
)
5131 return error_mark_node
;
5133 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init
), field
, field_init
);
5137 When a union is initialized with a brace-enclosed
5138 initializer, the braces shall only contain an
5139 initializer for the first member of the union. */
5140 if (TREE_CODE (type
) == UNION_TYPE
)
5143 field
= next_initializable_field (DECL_CHAIN (field
));
5149 /* Subroutine of reshape_init_r. We're in a context where C99 initializer
5150 designators are not valid; either complain or return true to indicate
5151 that reshape_init_r should return error_mark_node. */
5154 has_designator_problem (reshape_iter
*d
, tsubst_flags_t complain
)
5158 if (complain
& tf_error
)
5159 error ("C99 designator %qE outside aggregate initializer",
5167 /* Subroutine of reshape_init, which processes a single initializer (part of
5168 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5169 iterator within the CONSTRUCTOR which points to the initializer to process.
5170 FIRST_INITIALIZER_P is true if this is the first initializer of the
5171 outermost CONSTRUCTOR node. */
5174 reshape_init_r (tree type
, reshape_iter
*d
, bool first_initializer_p
,
5175 tsubst_flags_t complain
)
5177 tree init
= d
->cur
->value
;
5179 if (error_operand_p (init
))
5180 return error_mark_node
;
5182 if (first_initializer_p
&& !CP_AGGREGATE_TYPE_P (type
)
5183 && has_designator_problem (d
, complain
))
5184 return error_mark_node
;
5186 if (TREE_CODE (type
) == COMPLEX_TYPE
)
5188 /* A complex type can be initialized from one or two initializers,
5189 but braces are not elided. */
5191 if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5193 if (CONSTRUCTOR_NELTS (init
) > 2)
5195 if (complain
& tf_error
)
5196 error ("too many initializers for %qT", type
);
5198 return error_mark_node
;
5201 else if (first_initializer_p
&& d
->cur
!= d
->end
)
5203 VEC(constructor_elt
, gc
) *v
= 0;
5204 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, init
);
5205 CONSTRUCTOR_APPEND_ELT (v
, NULL_TREE
, d
->cur
->value
);
5206 if (has_designator_problem (d
, complain
))
5207 return error_mark_node
;
5209 init
= build_constructor (init_list_type_node
, v
);
5214 /* A non-aggregate type is always initialized with a single
5216 if (!CP_AGGREGATE_TYPE_P (type
))
5218 /* It is invalid to initialize a non-aggregate type with a
5219 brace-enclosed initializer before C++0x.
5220 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5221 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5222 a CONSTRUCTOR (with a record type). */
5223 if (TREE_CODE (init
) == CONSTRUCTOR
5224 && BRACE_ENCLOSED_INITIALIZER_P (init
)) /* p7626.C */
5226 if (SCALAR_TYPE_P (type
))
5228 if (complain
& tf_error
)
5229 error ("braces around scalar initializer for type %qT", type
);
5230 init
= error_mark_node
;
5233 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5242 All implicit type conversions (clause _conv_) are considered when
5243 initializing the aggregate member with an initializer from an
5244 initializer-list. If the initializer can initialize a member,
5245 the member is initialized. Otherwise, if the member is itself a
5246 non-empty subaggregate, brace elision is assumed and the
5247 initializer is considered for the initialization of the first
5248 member of the subaggregate. */
5249 if (TREE_CODE (init
) != CONSTRUCTOR
5250 /* But don't try this for the first initializer, since that would be
5251 looking through the outermost braces; A a2 = { a1 }; is not a
5252 valid aggregate initialization. */
5253 && !first_initializer_p
5254 && (same_type_ignoring_top_level_qualifiers_p (type
, TREE_TYPE (init
))
5255 || can_convert_arg (type
, TREE_TYPE (init
), init
, LOOKUP_NORMAL
)))
5261 /* [dcl.init.string]
5263 A char array (whether plain char, signed char, or unsigned char)
5264 can be initialized by a string-literal (optionally enclosed in
5265 braces); a wchar_t array can be initialized by a wide
5266 string-literal (optionally enclosed in braces). */
5267 if (TREE_CODE (type
) == ARRAY_TYPE
5268 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type
))))
5270 tree str_init
= init
;
5272 /* Strip one level of braces if and only if they enclose a single
5273 element (as allowed by [dcl.init.string]). */
5274 if (!first_initializer_p
5275 && TREE_CODE (str_init
) == CONSTRUCTOR
5276 && VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (str_init
)) == 1)
5278 str_init
= VEC_index (constructor_elt
,
5279 CONSTRUCTOR_ELTS (str_init
), 0)->value
;
5282 /* If it's a string literal, then it's the initializer for the array
5283 as a whole. Otherwise, continue with normal initialization for
5284 array types (one value per array element). */
5285 if (TREE_CODE (str_init
) == STRING_CST
)
5287 if (has_designator_problem (d
, complain
))
5288 return error_mark_node
;
5294 /* The following cases are about aggregates. If we are not within a full
5295 initializer already, and there is not a CONSTRUCTOR, it means that there
5296 is a missing set of braces (that is, we are processing the case for
5297 which reshape_init exists). */
5298 if (!first_initializer_p
)
5300 if (TREE_CODE (init
) == CONSTRUCTOR
)
5302 if (TREE_TYPE (init
) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init
)))
5303 /* There is no need to reshape pointer-to-member function
5304 initializers, as they are always constructed correctly
5305 by the front end. */
5307 else if (COMPOUND_LITERAL_P (init
))
5308 /* For a nested compound literal, there is no need to reshape since
5309 brace elision is not allowed. Even if we decided to allow it,
5310 we should add a call to reshape_init in finish_compound_literal,
5311 before calling digest_init, so changing this code would still
5312 not be necessary. */
5313 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init
));
5317 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5318 return reshape_init (type
, init
, complain
);
5322 warning (OPT_Wmissing_braces
, "missing braces around initializer for %qT",
5326 /* Dispatch to specialized routines. */
5327 if (CLASS_TYPE_P (type
))
5328 return reshape_init_class (type
, d
, first_initializer_p
, complain
);
5329 else if (TREE_CODE (type
) == ARRAY_TYPE
)
5330 return reshape_init_array (type
, d
, complain
);
5331 else if (TREE_CODE (type
) == VECTOR_TYPE
)
5332 return reshape_init_vector (type
, d
, complain
);
5337 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5338 brace-enclosed aggregate initializer.
5340 INIT is the CONSTRUCTOR containing the list of initializers describing
5341 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5342 It may not presently match the shape of the TYPE; for example:
5344 struct S { int a; int b; };
5345 struct S a[] = { 1, 2, 3, 4 };
5347 Here INIT will hold a VEC of four elements, rather than a
5348 VEC of two elements, each itself a VEC of two elements. This
5349 routine transforms INIT from the former form into the latter. The
5350 revised CONSTRUCTOR node is returned. */
5353 reshape_init (tree type
, tree init
, tsubst_flags_t complain
)
5355 VEC(constructor_elt
, gc
) *v
;
5359 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init
));
5361 v
= CONSTRUCTOR_ELTS (init
);
5363 /* An empty constructor does not need reshaping, and it is always a valid
5365 if (VEC_empty (constructor_elt
, v
))
5368 /* Recurse on this CONSTRUCTOR. */
5369 d
.cur
= VEC_index (constructor_elt
, v
, 0);
5370 d
.end
= d
.cur
+ VEC_length (constructor_elt
, v
);
5372 new_init
= reshape_init_r (type
, &d
, true, complain
);
5373 if (new_init
== error_mark_node
)
5374 return error_mark_node
;
5376 /* Make sure all the element of the constructor were used. Otherwise,
5377 issue an error about exceeding initializers. */
5380 if (complain
& tf_error
)
5381 error ("too many initializers for %qT", type
);
5383 return error_mark_node
;
5389 /* Verify array initializer. Returns true if errors have been reported. */
5392 check_array_initializer (tree decl
, tree type
, tree init
)
5394 tree element_type
= TREE_TYPE (type
);
5396 /* The array type itself need not be complete, because the
5397 initializer may tell us how many elements are in the array.
5398 But, the elements of the array must be complete. */
5399 if (!COMPLETE_TYPE_P (complete_type (element_type
)))
5402 error ("elements of array %q#D have incomplete type", decl
);
5404 error ("elements of array %q#T have incomplete type", type
);
5407 /* It is not valid to initialize a VLA. */
5409 && ((COMPLETE_TYPE_P (type
) && !TREE_CONSTANT (TYPE_SIZE (type
)))
5410 || !TREE_CONSTANT (TYPE_SIZE (element_type
))))
5413 error ("variable-sized object %qD may not be initialized", decl
);
5415 error ("variable-sized compound literal");
5421 /* Subroutine of check_initializer; args are passed down from that function.
5422 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5425 build_aggr_init_full_exprs (tree decl
, tree init
, int flags
)
5428 gcc_assert (stmts_are_full_exprs_p ());
5429 return build_aggr_init (decl
, init
, flags
, tf_warning_or_error
);
5432 /* Verify INIT (the initializer for DECL), and record the
5433 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5434 grok_reference_init.
5436 If the return value is non-NULL, it is an expression that must be
5437 evaluated dynamically to initialize DECL. */
5440 check_initializer (tree decl
, tree init
, int flags
, VEC(tree
,gc
) **cleanups
)
5442 tree type
= TREE_TYPE (decl
);
5443 tree init_code
= NULL
;
5444 tree extra_init
= NULL_TREE
;
5447 /* Things that are going to be initialized need to have complete
5449 TREE_TYPE (decl
) = type
= complete_type (TREE_TYPE (decl
));
5451 if (DECL_HAS_VALUE_EXPR_P (decl
))
5453 /* A variable with DECL_HAS_VALUE_EXPR_P set is just a placeholder,
5454 it doesn't have storage to be initialized. */
5455 gcc_assert (init
== NULL_TREE
);
5459 if (type
== error_mark_node
)
5460 /* We will have already complained. */
5463 if (TREE_CODE (type
) == ARRAY_TYPE
)
5465 if (check_array_initializer (decl
, type
, init
))
5468 else if (!COMPLETE_TYPE_P (type
))
5470 error ("%q#D has incomplete type", decl
);
5471 TREE_TYPE (decl
) = error_mark_node
;
5475 /* There is no way to make a variable-sized class type in GNU C++. */
5476 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type
)));
5478 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5480 int init_len
= VEC_length (constructor_elt
, CONSTRUCTOR_ELTS (init
));
5481 if (SCALAR_TYPE_P (type
))
5485 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS
);
5486 init
= build_zero_init (type
, NULL_TREE
, false);
5488 else if (init_len
!= 1 && TREE_CODE (type
) != COMPLEX_TYPE
)
5490 error ("scalar object %qD requires one element in initializer",
5492 TREE_TYPE (decl
) = error_mark_node
;
5498 if (TREE_CODE (decl
) == CONST_DECL
)
5500 gcc_assert (TREE_CODE (type
) != REFERENCE_TYPE
);
5502 DECL_INITIAL (decl
) = init
;
5504 gcc_assert (init
!= NULL_TREE
);
5507 else if (!init
&& DECL_REALLY_EXTERN (decl
))
5509 else if (init
|| type_build_ctor_call (type
)
5510 || TREE_CODE (type
) == REFERENCE_TYPE
)
5512 if (TREE_CODE (type
) == REFERENCE_TYPE
)
5514 init
= grok_reference_init (decl
, type
, init
, flags
);
5515 flags
|= LOOKUP_ALREADY_DIGESTED
;
5518 check_for_uninitialized_const_var (decl
);
5519 /* Do not reshape constructors of vectors (they don't need to be
5521 else if (BRACE_ENCLOSED_INITIALIZER_P (init
))
5523 if (is_std_init_list (type
))
5525 init
= perform_implicit_conversion (type
, init
,
5526 tf_warning_or_error
);
5527 flags
|= LOOKUP_ALREADY_DIGESTED
;
5529 else if (TYPE_NON_AGGREGATE_CLASS (type
))
5531 /* Don't reshape if the class has constructors. */
5532 if (cxx_dialect
== cxx98
)
5533 error ("in C++98 %qD must be initialized by constructor, "
5537 else if (TREE_CODE (type
) == VECTOR_TYPE
&& TYPE_VECTOR_OPAQUE (type
))
5539 error ("opaque vector types cannot be initialized");
5540 init
= error_mark_node
;
5544 init
= reshape_init (type
, init
, tf_warning_or_error
);
5545 if (SCALAR_TYPE_P (type
))
5546 check_narrowing (type
, init
);
5550 /* If DECL has an array type without a specific bound, deduce the
5551 array size from the initializer. */
5552 maybe_deduce_size_from_array_init (decl
, init
);
5553 type
= TREE_TYPE (decl
);
5554 if (type
== error_mark_node
)
5557 if ((type_build_ctor_call (type
) || CLASS_TYPE_P (type
))
5558 && !(flags
& LOOKUP_ALREADY_DIGESTED
)
5559 && !(init
&& BRACE_ENCLOSED_INITIALIZER_P (init
)
5560 && CP_AGGREGATE_TYPE_P (type
)))
5562 init_code
= build_aggr_init_full_exprs (decl
, init
, flags
);
5564 /* If this is a constexpr initializer, expand_default_init will
5565 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5566 case, pull the initializer back out and pass it down into
5567 store_init_value. */
5568 while (TREE_CODE (init_code
) == EXPR_STMT
5569 || TREE_CODE (init_code
) == CONVERT_EXPR
)
5570 init_code
= TREE_OPERAND (init_code
, 0);
5571 if (TREE_CODE (init_code
) == INIT_EXPR
)
5573 init
= TREE_OPERAND (init_code
, 1);
5574 init_code
= NULL_TREE
;
5575 /* Don't call digest_init; it's unnecessary and will complain
5576 about aggregate initialization of non-aggregate classes. */
5577 flags
|= LOOKUP_ALREADY_DIGESTED
;
5579 else if (DECL_DECLARED_CONSTEXPR_P (decl
))
5581 /* Declared constexpr, but no suitable initializer; massage
5582 init appropriately so we can pass it into store_init_value
5584 if (init
&& BRACE_ENCLOSED_INITIALIZER_P (init
))
5585 init
= finish_compound_literal (type
, init
,
5586 tf_warning_or_error
);
5587 else if (CLASS_TYPE_P (type
)
5588 && (!init
|| TREE_CODE (init
) == TREE_LIST
))
5590 init
= build_functional_cast (type
, init
, tf_none
);
5591 if (init
!= error_mark_node
)
5592 TARGET_EXPR_DIRECT_INIT_P (init
) = true;
5594 init_code
= NULL_TREE
;
5600 if (init
&& TREE_CODE (init
) != TREE_VEC
)
5602 /* In aggregate initialization of a variable, each element
5603 initialization is a full-expression because there is no
5604 enclosing expression. */
5605 gcc_assert (stmts_are_full_exprs_p ());
5607 init_code
= store_init_value (decl
, init
, cleanups
, flags
);
5609 if (pedantic
&& TREE_CODE (type
) == ARRAY_TYPE
5610 && DECL_INITIAL (decl
)
5611 && TREE_CODE (DECL_INITIAL (decl
)) == STRING_CST
5612 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl
)))
5613 warning (0, "array %qD initialized by parenthesized string literal %qE",
5614 decl
, DECL_INITIAL (decl
));
5620 if (CLASS_TYPE_P (core_type
= strip_array_types (type
))
5621 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type
)
5622 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type
)))
5623 diagnose_uninitialized_cst_or_ref_member (core_type
, /*using_new=*/false,
5626 check_for_uninitialized_const_var (decl
);
5629 if (init
&& init
!= error_mark_node
)
5630 init_code
= build2 (INIT_EXPR
, type
, decl
, init
);
5633 init_code
= add_stmt_to_compound (extra_init
, init_code
);
5635 if (init_code
&& DECL_IN_AGGR_P (decl
))
5637 static int explained
= 0;
5639 if (cxx_dialect
< cxx0x
)
5640 error ("initializer invalid for static member with constructor");
5642 error ("non-constant in-class initialization invalid for static "
5643 "member %qD", decl
);
5646 error ("(an out of class initialization is required)");
5654 /* If DECL is not a local variable, give it RTL. */
5657 make_rtl_for_nonlocal_decl (tree decl
, tree init
, const char* asmspec
)
5659 int toplev
= toplevel_bindings_p ();
5661 const char *filename
;
5663 /* Set the DECL_ASSEMBLER_NAME for the object. */
5666 /* The `register' keyword, when used together with an
5667 asm-specification, indicates that the variable should be
5668 placed in a particular register. */
5669 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
5671 set_user_assembler_name (decl
, asmspec
);
5672 DECL_HARD_REGISTER (decl
) = 1;
5676 if (TREE_CODE (decl
) == FUNCTION_DECL
5677 && DECL_BUILT_IN_CLASS (decl
) == BUILT_IN_NORMAL
)
5678 set_builtin_user_assembler_name (decl
, asmspec
);
5679 set_user_assembler_name (decl
, asmspec
);
5683 /* Handle non-variables up front. */
5684 if (TREE_CODE (decl
) != VAR_DECL
)
5686 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5690 /* If we see a class member here, it should be a static data
5692 if (DECL_LANG_SPECIFIC (decl
) && DECL_IN_AGGR_P (decl
))
5694 gcc_assert (TREE_STATIC (decl
));
5695 /* An in-class declaration of a static data member should be
5696 external; it is only a declaration, and not a definition. */
5697 if (init
== NULL_TREE
)
5698 gcc_assert (DECL_EXTERNAL (decl
) || !TREE_PUBLIC (decl
));
5701 /* We don't create any RTL for local variables. */
5702 if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
5705 /* We defer emission of local statics until the corresponding
5706 DECL_EXPR is expanded. */
5707 defer_p
= DECL_FUNCTION_SCOPE_P (decl
) || DECL_VIRTUAL_P (decl
);
5709 /* We try to defer namespace-scope static constants so that they are
5710 not emitted into the object file unnecessarily. */
5711 filename
= input_filename
;
5712 if (!DECL_VIRTUAL_P (decl
)
5713 && TREE_READONLY (decl
)
5714 && DECL_INITIAL (decl
) != NULL_TREE
5715 && DECL_INITIAL (decl
) != error_mark_node
5717 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl
))
5719 && !TREE_PUBLIC (decl
))
5721 /* Fool with the linkage of static consts according to #pragma
5723 struct c_fileinfo
*finfo
= get_fileinfo (filename
);
5724 if (!finfo
->interface_unknown
&& !TREE_PUBLIC (decl
))
5726 TREE_PUBLIC (decl
) = 1;
5727 DECL_EXTERNAL (decl
) = finfo
->interface_only
;
5732 /* Likewise for template instantiations. */
5733 else if (DECL_LANG_SPECIFIC (decl
)
5734 && DECL_IMPLICIT_INSTANTIATION (decl
))
5737 /* If we're not deferring, go ahead and assemble the variable. */
5739 rest_of_decl_compilation (decl
, toplev
, at_eof
);
5742 /* walk_tree helper for wrap_temporary_cleanups, below. */
5745 wrap_cleanups_r (tree
*stmt_p
, int *walk_subtrees
, void *data
)
5747 /* Stop at types or full-expression boundaries. */
5748 if (TYPE_P (*stmt_p
)
5749 || TREE_CODE (*stmt_p
) == CLEANUP_POINT_EXPR
)
5755 if (TREE_CODE (*stmt_p
) == TARGET_EXPR
)
5757 tree guard
= (tree
)data
;
5758 tree tcleanup
= TARGET_EXPR_CLEANUP (*stmt_p
);
5760 tcleanup
= build2 (TRY_CATCH_EXPR
, void_type_node
, tcleanup
, guard
);
5761 /* Tell honor_protect_cleanup_actions to handle this as a separate
5763 TRY_CATCH_IS_CLEANUP (tcleanup
) = 1;
5765 TARGET_EXPR_CLEANUP (*stmt_p
) = tcleanup
;
5771 /* We're initializing a local variable which has a cleanup GUARD. If there
5772 are any temporaries used in the initializer INIT of this variable, we
5773 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5774 variable will be cleaned up properly if one of them throws.
5776 Unfortunately, there's no way to express this properly in terms of
5777 nesting, as the regions for the temporaries overlap the region for the
5778 variable itself; if there are two temporaries, the variable needs to be
5779 the first thing destroyed if either of them throws. However, we only
5780 want to run the variable's cleanup if it actually got constructed. So
5781 we need to guard the temporary cleanups with the variable's cleanup if
5782 they are run on the normal path, but not if they are run on the
5783 exceptional path. We implement this by telling
5784 honor_protect_cleanup_actions to strip the variable cleanup from the
5785 exceptional path. */
5788 wrap_temporary_cleanups (tree init
, tree guard
)
5790 cp_walk_tree_without_duplicates (&init
, wrap_cleanups_r
, (void *)guard
);
5793 /* Generate code to initialize DECL (a local variable). */
5796 initialize_local_var (tree decl
, tree init
)
5798 tree type
= TREE_TYPE (decl
);
5802 gcc_assert (TREE_CODE (decl
) == VAR_DECL
5803 || TREE_CODE (decl
) == RESULT_DECL
);
5804 gcc_assert (!TREE_STATIC (decl
));
5806 if (DECL_SIZE (decl
) == NULL_TREE
)
5808 /* If we used it already as memory, it must stay in memory. */
5809 DECL_INITIAL (decl
) = NULL_TREE
;
5810 TREE_ADDRESSABLE (decl
) = TREE_USED (decl
);
5814 if (type
== error_mark_node
)
5817 /* Compute and store the initial value. */
5818 already_used
= TREE_USED (decl
) || TREE_USED (type
);
5819 if (TREE_USED (type
))
5820 DECL_READ_P (decl
) = 1;
5822 /* Generate a cleanup, if necessary. */
5823 cleanup
= cxx_maybe_build_cleanup (decl
, tf_warning_or_error
);
5825 /* Perform the initialization. */
5828 if (TREE_CODE (init
) == INIT_EXPR
5829 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init
, 1)))
5831 /* Stick simple initializers in DECL_INITIAL so that
5832 -Wno-init-self works (c++/34772). */
5833 gcc_assert (TREE_OPERAND (init
, 0) == decl
);
5834 DECL_INITIAL (decl
) = TREE_OPERAND (init
, 1);
5838 int saved_stmts_are_full_exprs_p
;
5840 /* If we're only initializing a single object, guard the
5841 destructors of any temporaries used in its initializer with
5842 its destructor. This isn't right for arrays because each
5843 element initialization is a full-expression. */
5844 if (cleanup
&& TREE_CODE (type
) != ARRAY_TYPE
)
5845 wrap_temporary_cleanups (init
, cleanup
);
5847 gcc_assert (building_stmt_list_p ());
5848 saved_stmts_are_full_exprs_p
= stmts_are_full_exprs_p ();
5849 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
5850 finish_expr_stmt (init
);
5851 current_stmt_tree ()->stmts_are_full_exprs_p
=
5852 saved_stmts_are_full_exprs_p
;
5856 /* Set this to 0 so we can tell whether an aggregate which was
5857 initialized was ever used. Don't do this if it has a
5858 destructor, so we don't complain about the 'resource
5859 allocation is initialization' idiom. Now set
5860 attribute((unused)) on types so decls of that type will be
5861 marked used. (see TREE_USED, above.) */
5862 if (TYPE_NEEDS_CONSTRUCTING (type
)
5864 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type
)
5865 && DECL_NAME (decl
))
5866 TREE_USED (decl
) = 0;
5867 else if (already_used
)
5868 TREE_USED (decl
) = 1;
5871 finish_decl_cleanup (decl
, cleanup
);
5874 /* DECL is a VAR_DECL for a compiler-generated variable with static
5875 storage duration (like a virtual table) whose initializer is a
5876 compile-time constant. Initialize the variable and provide it to the
5880 initialize_artificial_var (tree decl
, VEC(constructor_elt
,gc
) *v
)
5883 gcc_assert (DECL_ARTIFICIAL (decl
));
5884 init
= build_constructor (TREE_TYPE (decl
), v
);
5885 gcc_assert (TREE_CODE (init
) == CONSTRUCTOR
);
5886 DECL_INITIAL (decl
) = init
;
5887 DECL_INITIALIZED_P (decl
) = 1;
5888 determine_visibility (decl
);
5889 layout_var_decl (decl
);
5890 maybe_commonize_var (decl
);
5891 make_rtl_for_nonlocal_decl (decl
, init
, /*asmspec=*/NULL
);
5894 /* INIT is the initializer for a variable, as represented by the
5895 parser. Returns true iff INIT is type-dependent. */
5898 type_dependent_init_p (tree init
)
5900 if (TREE_CODE (init
) == TREE_LIST
)
5901 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5902 return any_type_dependent_elements_p (init
);
5903 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5904 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5906 VEC(constructor_elt
, gc
) *elts
;
5910 elts
= CONSTRUCTOR_ELTS (init
);
5911 nelts
= VEC_length (constructor_elt
, elts
);
5912 for (i
= 0; i
< nelts
; ++i
)
5913 if (type_dependent_init_p (VEC_index (constructor_elt
,
5918 /* It must be a simple expression, e.g., int i = 3; */
5919 return type_dependent_expression_p (init
);
5924 /* INIT is the initializer for a variable, as represented by the
5925 parser. Returns true iff INIT is value-dependent. */
5928 value_dependent_init_p (tree init
)
5930 if (TREE_CODE (init
) == TREE_LIST
)
5931 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5932 return any_value_dependent_elements_p (init
);
5933 else if (TREE_CODE (init
) == CONSTRUCTOR
)
5934 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5936 VEC(constructor_elt
, gc
) *elts
;
5940 elts
= CONSTRUCTOR_ELTS (init
);
5941 nelts
= VEC_length (constructor_elt
, elts
);
5942 for (i
= 0; i
< nelts
; ++i
)
5943 if (value_dependent_init_p (VEC_index (constructor_elt
,
5948 /* It must be a simple expression, e.g., int i = 3; */
5949 return value_dependent_expression_p (init
);
5954 /* Finish processing of a declaration;
5955 install its line number and initial value.
5956 If the length of an array type is not known before,
5957 it must be determined now, from the initial value, or it is an error.
5959 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5960 true, then INIT is an integral constant expression.
5962 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5963 if the (init) syntax was used. */
5966 cp_finish_decl (tree decl
, tree init
, bool init_const_expr_p
,
5967 tree asmspec_tree
, int flags
)
5970 VEC(tree
,gc
) *cleanups
= NULL
;
5971 const char *asmspec
= NULL
;
5972 int was_readonly
= 0;
5973 bool var_definition_p
= false;
5976 if (decl
== error_mark_node
)
5981 error ("assignment (not initialization) in declaration");
5985 gcc_assert (TREE_CODE (decl
) != RESULT_DECL
);
5986 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5987 gcc_assert (TREE_CODE (decl
) != PARM_DECL
);
5989 type
= TREE_TYPE (decl
);
5990 if (type
== error_mark_node
)
5993 /* If a name was specified, get the string. */
5994 if (at_namespace_scope_p ())
5995 asmspec_tree
= maybe_apply_renaming_pragma (decl
, asmspec_tree
);
5996 if (asmspec_tree
&& asmspec_tree
!= error_mark_node
)
5997 asmspec
= TREE_STRING_POINTER (asmspec_tree
);
5999 if (current_class_type
6000 && CP_DECL_CONTEXT (decl
) == current_class_type
6001 && TYPE_BEING_DEFINED (current_class_type
)
6002 && !CLASSTYPE_TEMPLATE_INSTANTIATION (current_class_type
)
6003 && (DECL_INITIAL (decl
) || init
))
6004 DECL_INITIALIZED_IN_CLASS_P (decl
) = 1;
6006 auto_node
= type_uses_auto (type
);
6010 if (init
== NULL_TREE
)
6012 error ("declaration of %q#D has no initializer", decl
);
6013 TREE_TYPE (decl
) = error_mark_node
;
6017 if (TREE_CODE (d_init
) == TREE_LIST
)
6018 d_init
= build_x_compound_expr_from_list (d_init
, ELK_INIT
,
6019 tf_warning_or_error
);
6020 d_init
= resolve_nondeduced_context (d_init
);
6021 type
= TREE_TYPE (decl
) = do_auto_deduction (type
, d_init
,
6023 if (type
== error_mark_node
)
6027 if (!ensure_literal_type_for_constexpr_object (decl
))
6028 DECL_DECLARED_CONSTEXPR_P (decl
) = 0;
6030 if (TREE_CODE (decl
) == VAR_DECL
6031 && DECL_CLASS_SCOPE_P (decl
)
6032 && DECL_INITIALIZED_IN_CLASS_P (decl
))
6033 check_static_variable_definition (decl
, type
);
6035 if (init
&& TREE_CODE (decl
) == FUNCTION_DECL
)
6038 if (init
== ridpointers
[(int)RID_DELETE
])
6040 /* FIXME check this is 1st decl. */
6041 DECL_DELETED_FN (decl
) = 1;
6042 DECL_DECLARED_INLINE_P (decl
) = 1;
6043 DECL_INITIAL (decl
) = error_mark_node
;
6044 FOR_EACH_CLONE (clone
, decl
)
6046 DECL_DELETED_FN (clone
) = 1;
6047 DECL_DECLARED_INLINE_P (clone
) = 1;
6048 DECL_INITIAL (clone
) = error_mark_node
;
6052 else if (init
== ridpointers
[(int)RID_DEFAULT
])
6054 if (defaultable_fn_check (decl
))
6055 DECL_DEFAULTED_FN (decl
) = 1;
6057 DECL_INITIAL (decl
) = NULL_TREE
;
6061 if (init
&& TREE_CODE (decl
) == VAR_DECL
)
6063 DECL_NONTRIVIALLY_INITIALIZED_P (decl
) = 1;
6064 /* If DECL is a reference, then we want to know whether init is a
6065 reference constant; init_const_expr_p as passed tells us whether
6066 it's an rvalue constant. */
6067 if (TREE_CODE (type
) == REFERENCE_TYPE
)
6068 init_const_expr_p
= potential_constant_expression (init
);
6069 if (init_const_expr_p
)
6071 /* Set these flags now for templates. We'll update the flags in
6072 store_init_value for instantiations. */
6073 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl
) = 1;
6074 if (decl_maybe_constant_var_p (decl
))
6075 TREE_CONSTANT (decl
) = 1;
6079 if (processing_template_decl
)
6081 bool type_dependent_p
;
6083 /* Add this declaration to the statement-tree. */
6084 if (at_function_scope_p ())
6085 add_decl_expr (decl
);
6087 type_dependent_p
= dependent_type_p (type
);
6089 if (check_for_bare_parameter_packs (init
))
6092 DECL_INITIAL (decl
) = NULL_TREE
;
6095 /* Generally, initializers in templates are expanded when the
6096 template is instantiated. But, if DECL is a variable constant
6097 then it can be used in future constant expressions, so its value
6098 must be available. */
6100 if (TREE_CODE (decl
) != VAR_DECL
|| dependent_type_p (type
))
6101 /* We can't do anything if the decl has dependent type. */;
6103 && init_const_expr_p
6104 && !type_dependent_p
6105 && decl_maybe_constant_var_p (decl
)
6106 && !type_dependent_init_p (init
)
6107 && !value_dependent_init_p (init
))
6109 /* This variable seems to be a non-dependent constant, so process
6110 its initializer. If check_initializer returns non-null the
6111 initialization wasn't constant after all. */
6113 cleanups
= make_tree_vector ();
6114 init_code
= check_initializer (decl
, init
, flags
, &cleanups
);
6115 if (init_code
== NULL_TREE
)
6117 release_tree_vector (cleanups
);
6119 else if (!DECL_PRETTY_FUNCTION_P (decl
))
6120 /* Deduce array size even if the initializer is dependent. */
6121 maybe_deduce_size_from_array_init (decl
, init
);
6124 DECL_INITIAL (decl
) = init
;
6128 /* Just store non-static data member initializers for later. */
6129 if (init
&& TREE_CODE (decl
) == FIELD_DECL
)
6130 DECL_INITIAL (decl
) = init
;
6132 /* Take care of TYPE_DECLs up front. */
6133 if (TREE_CODE (decl
) == TYPE_DECL
)
6135 if (type
!= error_mark_node
6136 && MAYBE_CLASS_TYPE_P (type
) && DECL_NAME (decl
))
6138 if (TREE_TYPE (DECL_NAME (decl
)) && TREE_TYPE (decl
) != type
)
6139 warning (0, "shadowing previous type declaration of %q#D", decl
);
6140 set_identifier_type_value (DECL_NAME (decl
), decl
);
6143 /* If we have installed this as the canonical typedef for this
6144 type, and that type has not been defined yet, delay emitting
6145 the debug information for it, as we will emit it later. */
6146 if (TYPE_MAIN_DECL (TREE_TYPE (decl
)) == decl
6147 && !COMPLETE_TYPE_P (TREE_TYPE (decl
)))
6148 TYPE_DECL_SUPPRESS_DEBUG (decl
) = 1;
6150 rest_of_decl_compilation (decl
, DECL_FILE_SCOPE_P (decl
),
6155 /* A reference will be modified here, as it is initialized. */
6156 if (! DECL_EXTERNAL (decl
)
6157 && TREE_READONLY (decl
)
6158 && TREE_CODE (type
) == REFERENCE_TYPE
)
6161 TREE_READONLY (decl
) = 0;
6164 if (TREE_CODE (decl
) == VAR_DECL
)
6166 /* Only variables with trivial initialization and destruction can
6167 have thread-local storage. */
6168 if (DECL_THREAD_LOCAL_P (decl
)
6169 && (type_has_nontrivial_default_init (TREE_TYPE (decl
))
6170 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
6171 error ("%qD cannot be thread-local because it has non-trivial "
6172 "type %qT", decl
, TREE_TYPE (decl
));
6173 /* If this is a local variable that will need a mangled name,
6174 register it now. We must do this before processing the
6175 initializer for the variable, since the initialization might
6176 require a guard variable, and since the mangled name of the
6177 guard variable will depend on the mangled name of this
6179 if (DECL_FUNCTION_SCOPE_P (decl
)
6180 && TREE_STATIC (decl
)
6181 && !DECL_ARTIFICIAL (decl
))
6183 push_local_name (decl
);
6184 if (DECL_CONSTRUCTOR_P (current_function_decl
)
6185 || DECL_DESTRUCTOR_P (current_function_decl
))
6186 /* Normally local_decls is populated during GIMPLE lowering,
6187 but [cd]tors are never actually compiled directly. We need
6188 to put statics on the list so we can deal with the label
6189 address extension. */
6190 add_local_decl (cfun
, decl
);
6193 /* Convert the initializer to the type of DECL, if we have not
6194 already initialized DECL. */
6195 if (!DECL_INITIALIZED_P (decl
)
6196 /* If !DECL_EXTERNAL then DECL is being defined. In the
6197 case of a static data member initialized inside the
6198 class-specifier, there can be an initializer even if DECL
6199 is *not* defined. */
6200 && (!DECL_EXTERNAL (decl
) || init
))
6202 if (TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6205 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6206 /* Allow libjava/prims.cc define primitive classes. */
6207 if (init
!= NULL_TREE
6208 || jclass
== NULL_TREE
6209 || TREE_CODE (jclass
) != TYPE_DECL
6210 || !POINTER_TYPE_P (TREE_TYPE (jclass
))
6211 || !same_type_ignoring_top_level_qualifiers_p
6212 (type
, TREE_TYPE (TREE_TYPE (jclass
))))
6213 error ("Java object %qD not allocated with %<new%>", decl
);
6216 cleanups
= make_tree_vector ();
6217 init
= check_initializer (decl
, init
, flags
, &cleanups
);
6218 /* Thread-local storage cannot be dynamically initialized. */
6219 if (DECL_THREAD_LOCAL_P (decl
) && init
)
6221 error ("%qD is thread-local and so cannot be dynamically "
6222 "initialized", decl
);
6226 /* Check that the initializer for a static data member was a
6227 constant. Although we check in the parser that the
6228 initializer is an integral constant expression, we do not
6229 simplify division-by-zero at the point at which it
6230 occurs. Therefore, in:
6232 struct S { static const int i = 7 / 0; };
6234 we issue an error at this point. It would
6235 probably be better to forbid division by zero in
6236 integral constant expressions. */
6237 if (DECL_EXTERNAL (decl
) && init
)
6239 error ("%qD cannot be initialized by a non-constant expression"
6240 " when being declared", decl
);
6241 DECL_INITIALIZED_IN_CLASS_P (decl
) = 0;
6249 The memory occupied by any object of static storage
6250 duration is zero-initialized at program startup before
6251 any other initialization takes place.
6253 We cannot create an appropriate initializer until after
6254 the type of DECL is finalized. If DECL_INITIAL is set,
6255 then the DECL is statically initialized, and any
6256 necessary zero-initialization has already been performed. */
6257 if (TREE_STATIC (decl
) && !DECL_INITIAL (decl
))
6258 DECL_INITIAL (decl
) = build_zero_init (TREE_TYPE (decl
),
6259 /*nelts=*/NULL_TREE
,
6260 /*static_storage_p=*/true);
6261 /* Remember that the initialization for this variable has
6263 DECL_INITIALIZED_P (decl
) = 1;
6264 /* This declaration is the definition of this variable,
6265 unless we are initializing a static data member within
6266 the class specifier. */
6267 if (!DECL_EXTERNAL (decl
))
6268 var_definition_p
= true;
6270 /* If the variable has an array type, lay out the type, even if
6271 there is no initializer. It is valid to index through the
6272 array, and we must get TYPE_ALIGN set correctly on the array
6274 else if (TREE_CODE (type
) == ARRAY_TYPE
)
6277 if (TREE_STATIC (decl
)
6278 && !at_function_scope_p ()
6279 && current_function_decl
== NULL
)
6280 /* So decl is a global variable or a static member of a
6281 non local class. Record the types it uses
6282 so that we can decide later to emit debug info for them. */
6283 record_types_used_by_current_var_decl (decl
);
6285 else if (TREE_CODE (decl
) == FIELD_DECL
6286 && TYPE_FOR_JAVA (type
) && MAYBE_CLASS_TYPE_P (type
))
6287 error ("non-static data member %qD has Java class type", decl
);
6289 /* Add this declaration to the statement-tree. This needs to happen
6290 after the call to check_initializer so that the DECL_EXPR for a
6291 reference temp is added before the DECL_EXPR for the reference itself. */
6292 if (DECL_FUNCTION_SCOPE_P (decl
))
6293 add_decl_expr (decl
);
6295 /* Let the middle end know about variables and functions -- but not
6296 static data members in uninstantiated class templates. */
6297 if (TREE_CODE (decl
) == VAR_DECL
6298 || TREE_CODE (decl
) == FUNCTION_DECL
)
6300 if (TREE_CODE (decl
) == VAR_DECL
)
6302 layout_var_decl (decl
);
6303 maybe_commonize_var (decl
);
6306 /* This needs to happen after the linkage is set. */
6307 determine_visibility (decl
);
6309 if (var_definition_p
&& TREE_STATIC (decl
))
6311 /* If a TREE_READONLY variable needs initialization
6312 at runtime, it is no longer readonly and we need to
6313 avoid MEM_READONLY_P being set on RTL created for it. */
6316 if (TREE_READONLY (decl
))
6317 TREE_READONLY (decl
) = 0;
6320 else if (was_readonly
)
6321 TREE_READONLY (decl
) = 1;
6324 make_rtl_for_nonlocal_decl (decl
, init
, asmspec
);
6326 /* Check for abstractness of the type. Notice that there is no
6327 need to strip array types here since the check for those types
6328 is already done within create_array_type_for_decl. */
6329 if (TREE_CODE (type
) == FUNCTION_TYPE
6330 || TREE_CODE (type
) == METHOD_TYPE
)
6331 abstract_virtuals_error (decl
, TREE_TYPE (type
));
6333 abstract_virtuals_error (decl
, type
);
6335 if (TREE_TYPE (decl
) == error_mark_node
)
6336 /* No initialization required. */
6338 else if (TREE_CODE (decl
) == FUNCTION_DECL
)
6342 if (init
== ridpointers
[(int)RID_DEFAULT
])
6344 /* An out-of-class default definition is defined at
6345 the point where it is explicitly defaulted. */
6346 if (DECL_DELETED_FN (decl
))
6347 maybe_explain_implicit_delete (decl
);
6348 else if (DECL_INITIAL (decl
) == error_mark_node
)
6349 synthesize_method (decl
);
6352 error ("function %q#D is initialized like a variable", decl
);
6354 /* else no initialization required. */
6356 else if (DECL_EXTERNAL (decl
)
6357 && ! (DECL_LANG_SPECIFIC (decl
)
6358 && DECL_NOT_REALLY_EXTERN (decl
)))
6361 DECL_INITIAL (decl
) = init
;
6363 /* A variable definition. */
6364 else if (DECL_FUNCTION_SCOPE_P (decl
) && !TREE_STATIC (decl
))
6365 /* Initialize the local variable. */
6366 initialize_local_var (decl
, init
);
6368 /* If a variable is defined, and then a subsequent
6369 definition with external linkage is encountered, we will
6370 get here twice for the same variable. We want to avoid
6371 calling expand_static_init more than once. For variables
6372 that are not static data members, we can call
6373 expand_static_init only when we actually process the
6374 initializer. It is not legal to redeclare a static data
6375 member, so this issue does not arise in that case. */
6376 else if (var_definition_p
&& TREE_STATIC (decl
))
6377 expand_static_init (decl
, init
);
6380 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6381 reference, insert it in the statement-tree now. */
6385 FOR_EACH_VEC_ELT (tree
, cleanups
, i
, t
)
6386 push_cleanup (decl
, t
, false);
6387 release_tree_vector (cleanups
);
6391 TREE_READONLY (decl
) = 1;
6393 invoke_plugin_callbacks (PLUGIN_FINISH_DECL
, decl
);
6396 /* Returns a declaration for a VAR_DECL as if:
6398 extern "C" TYPE NAME;
6400 had been seen. Used to create compiler-generated global
6404 declare_global_var (tree name
, tree type
)
6408 push_to_top_level ();
6409 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
6410 TREE_PUBLIC (decl
) = 1;
6411 DECL_EXTERNAL (decl
) = 1;
6412 DECL_ARTIFICIAL (decl
) = 1;
6413 /* If the user has explicitly declared this variable (perhaps
6414 because the code we are compiling is part of a low-level runtime
6415 library), then it is possible that our declaration will be merged
6416 with theirs by pushdecl. */
6417 decl
= pushdecl (decl
);
6418 cp_finish_decl (decl
, NULL_TREE
, false, NULL_TREE
, 0);
6419 pop_from_top_level ();
6424 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6425 if "__cxa_atexit" is not being used) corresponding to the function
6426 to be called when the program exits. */
6429 get_atexit_fn_ptr_type (void)
6433 if (!atexit_fn_ptr_type_node
)
6436 if (flag_use_cxa_atexit
6437 && !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6438 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6439 arg_type
= ptr_type_node
;
6441 /* The parameter to "atexit" is "void (*)(void)". */
6442 arg_type
= NULL_TREE
;
6444 fn_type
= build_function_type_list (void_type_node
,
6445 arg_type
, NULL_TREE
);
6446 atexit_fn_ptr_type_node
= build_pointer_type (fn_type
);
6449 return atexit_fn_ptr_type_node
;
6452 /* Returns a pointer to the `atexit' function. Note that if
6453 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6454 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6457 get_atexit_node (void)
6463 bool use_aeabi_atexit
;
6468 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6470 /* The declaration for `__cxa_atexit' is:
6472 int __cxa_atexit (void (*)(void *), void *, void *)
6474 We build up the argument types and then the function type
6476 tree argtype0
, argtype1
, argtype2
;
6478 use_aeabi_atexit
= targetm
.cxx
.use_aeabi_atexit ();
6479 /* First, build the pointer-to-function type for the first
6481 fn_ptr_type
= get_atexit_fn_ptr_type ();
6482 /* Then, build the rest of the argument types. */
6483 argtype2
= ptr_type_node
;
6484 if (use_aeabi_atexit
)
6486 argtype1
= fn_ptr_type
;
6487 argtype0
= ptr_type_node
;
6491 argtype1
= ptr_type_node
;
6492 argtype0
= fn_ptr_type
;
6494 /* And the final __cxa_atexit type. */
6495 fn_type
= build_function_type_list (integer_type_node
,
6496 argtype0
, argtype1
, argtype2
,
6498 fn_ptr_type
= build_pointer_type (fn_type
);
6499 if (use_aeabi_atexit
)
6500 name
= "__aeabi_atexit";
6502 name
= "__cxa_atexit";
6506 /* The declaration for `atexit' is:
6508 int atexit (void (*)());
6510 We build up the argument types and then the function type
6512 fn_ptr_type
= get_atexit_fn_ptr_type ();
6513 /* Build the final atexit type. */
6514 fn_type
= build_function_type_list (integer_type_node
,
6515 fn_ptr_type
, NULL_TREE
);
6519 /* Now, build the function declaration. */
6520 push_lang_context (lang_name_c
);
6521 atexit_fndecl
= build_library_fn_ptr (name
, fn_type
);
6522 mark_used (atexit_fndecl
);
6523 pop_lang_context ();
6524 atexit_node
= decay_conversion (atexit_fndecl
);
6529 /* Returns the __dso_handle VAR_DECL. */
6532 get_dso_handle_node (void)
6534 if (dso_handle_node
)
6535 return dso_handle_node
;
6537 /* Declare the variable. */
6538 dso_handle_node
= declare_global_var (get_identifier ("__dso_handle"),
6541 #ifdef HAVE_GAS_HIDDEN
6542 DECL_VISIBILITY (dso_handle_node
) = VISIBILITY_HIDDEN
;
6543 DECL_VISIBILITY_SPECIFIED (dso_handle_node
) = 1;
6546 return dso_handle_node
;
6549 /* Begin a new function with internal linkage whose job will be simply
6550 to destroy some particular variable. */
6552 static GTY(()) int start_cleanup_cnt
;
6555 start_cleanup_fn (void)
6560 bool use_cxa_atexit
= flag_use_cxa_atexit
6561 && !targetm
.cxx
.use_atexit_for_cxa_atexit ();
6563 push_to_top_level ();
6565 /* No need to mangle this. */
6566 push_lang_context (lang_name_c
);
6568 /* Build the name of the function. */
6569 sprintf (name
, "__tcf_%d", start_cleanup_cnt
++);
6570 /* Build the function declaration. */
6571 fntype
= TREE_TYPE (get_atexit_fn_ptr_type ());
6572 fndecl
= build_lang_decl (FUNCTION_DECL
, get_identifier (name
), fntype
);
6573 /* It's a function with internal linkage, generated by the
6575 TREE_PUBLIC (fndecl
) = 0;
6576 DECL_ARTIFICIAL (fndecl
) = 1;
6577 /* Make the function `inline' so that it is only emitted if it is
6578 actually needed. It is unlikely that it will be inlined, since
6579 it is only called via a function pointer, but we avoid unnecessary
6580 emissions this way. */
6581 DECL_DECLARED_INLINE_P (fndecl
) = 1;
6582 DECL_INTERFACE_KNOWN (fndecl
) = 1;
6583 /* Build the parameter. */
6588 parmdecl
= cp_build_parm_decl (NULL_TREE
, ptr_type_node
);
6589 DECL_CONTEXT (parmdecl
) = fndecl
;
6590 TREE_USED (parmdecl
) = 1;
6591 DECL_READ_P (parmdecl
) = 1;
6592 DECL_ARGUMENTS (fndecl
) = parmdecl
;
6596 start_preparsed_function (fndecl
, NULL_TREE
, SF_PRE_PARSED
);
6598 pop_lang_context ();
6600 return current_function_decl
;
6603 /* Finish the cleanup function begun by start_cleanup_fn. */
6606 end_cleanup_fn (void)
6608 expand_or_defer_fn (finish_function (0));
6610 pop_from_top_level ();
6613 /* Generate code to handle the destruction of DECL, an object with
6614 static storage duration. */
6617 register_dtor_fn (tree decl
)
6624 tree arg0
, arg1
= NULL_TREE
, arg2
= NULL_TREE
;
6626 type
= TREE_TYPE (decl
);
6627 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type
))
6628 return void_zero_node
;
6630 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6631 a class object, we can just pass the destructor to
6632 "__cxa_atexit"; we don't have to build a temporary function to do
6634 use_dtor
= (flag_use_cxa_atexit
6635 && !targetm
.cxx
.use_atexit_for_cxa_atexit ()
6636 && CLASS_TYPE_P (type
));
6641 /* Find the destructor. */
6642 idx
= lookup_fnfields_1 (type
, complete_dtor_identifier
);
6643 gcc_assert (idx
>= 0);
6644 cleanup
= VEC_index (tree
, CLASSTYPE_METHOD_VEC (type
), idx
);
6645 /* Make sure it is accessible. */
6646 perform_or_defer_access_check (TYPE_BINFO (type
), cleanup
, cleanup
);
6650 /* Call build_cleanup before we enter the anonymous function so
6651 that any access checks will be done relative to the current
6652 scope, rather than the scope of the anonymous function. */
6653 build_cleanup (decl
);
6655 /* Now start the function. */
6656 cleanup
= start_cleanup_fn ();
6658 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6659 to the original function, rather than the anonymous one. That
6660 will make the back end think that nested functions are in use,
6661 which causes confusion. */
6662 push_deferring_access_checks (dk_no_check
);
6663 fcall
= build_cleanup (decl
);
6664 pop_deferring_access_checks ();
6666 /* Create the body of the anonymous function. */
6667 compound_stmt
= begin_compound_stmt (BCS_FN_BODY
);
6668 finish_expr_stmt (fcall
);
6669 finish_compound_stmt (compound_stmt
);
6673 /* Call atexit with the cleanup function. */
6674 mark_used (cleanup
);
6675 cleanup
= build_address (cleanup
);
6676 if (flag_use_cxa_atexit
&& !targetm
.cxx
.use_atexit_for_cxa_atexit ())
6682 /* We must convert CLEANUP to the type that "__cxa_atexit"
6684 cleanup
= build_nop (get_atexit_fn_ptr_type (), cleanup
);
6685 /* "__cxa_atexit" will pass the address of DECL to the
6686 cleanup function. */
6688 addr
= build_address (decl
);
6689 /* The declared type of the parameter to "__cxa_atexit" is
6690 "void *". For plain "T*", we could just let the
6691 machinery in cp_build_function_call convert it -- but if the
6692 type is "cv-qualified T *", then we need to convert it
6693 before passing it in, to avoid spurious errors. */
6694 addr
= build_nop (ptr_type_node
, addr
);
6697 /* Since the cleanup functions we build ignore the address
6698 they're given, there's no reason to pass the actual address
6699 in, and, in general, it's cheaper to pass NULL than any
6701 addr
= null_pointer_node
;
6702 arg2
= cp_build_addr_expr (get_dso_handle_node (),
6703 tf_warning_or_error
);
6704 if (targetm
.cxx
.use_aeabi_atexit ())
6717 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error
,
6718 arg0
, arg1
, arg2
, NULL_TREE
);
6721 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6722 is its initializer. Generate code to handle the construction
6723 and destruction of DECL. */
6726 expand_static_init (tree decl
, tree init
)
6728 gcc_assert (TREE_CODE (decl
) == VAR_DECL
);
6729 gcc_assert (TREE_STATIC (decl
));
6731 /* Some variables require no dynamic initialization. */
6733 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl
)))
6736 if (DECL_FUNCTION_SCOPE_P (decl
))
6738 /* Emit code to perform this initialization but once. */
6739 tree if_stmt
= NULL_TREE
, inner_if_stmt
= NULL_TREE
;
6740 tree then_clause
= NULL_TREE
, inner_then_clause
= NULL_TREE
;
6741 tree guard
, guard_addr
;
6744 /* Emit code to perform this initialization but once. This code
6747 static <type> guard;
6748 if (!guard.first_byte) {
6749 if (__cxa_guard_acquire (&guard)) {
6752 // Do initialization.
6753 flag = true; __cxa_guard_release (&guard);
6754 // Register variable for destruction at end of program.
6756 if (!flag) __cxa_guard_abort (&guard);
6760 Note that the `flag' variable is only set to 1 *after* the
6761 initialization is complete. This ensures that an exception,
6762 thrown during the construction, will cause the variable to
6763 reinitialized when we pass through this code again, as per:
6767 If the initialization exits by throwing an exception, the
6768 initialization is not complete, so it will be tried again
6769 the next time control enters the declaration.
6771 This process should be thread-safe, too; multiple threads
6772 should not be able to initialize the variable more than
6775 /* Create the guard variable. */
6776 guard
= get_guard (decl
);
6778 /* This optimization isn't safe on targets with relaxed memory
6779 consistency. On such targets we force synchronization in
6780 __cxa_guard_acquire. */
6781 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6783 /* Begin the conditional initialization. */
6784 if_stmt
= begin_if_stmt ();
6785 finish_if_stmt_cond (get_guard_cond (guard
), if_stmt
);
6786 then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6789 if (flag_threadsafe_statics
)
6791 tree vfntype
= NULL_TREE
;
6792 tree acquire_name
, release_name
, abort_name
;
6793 tree acquire_fn
, release_fn
, abort_fn
;
6794 guard_addr
= build_address (guard
);
6796 acquire_name
= get_identifier ("__cxa_guard_acquire");
6797 release_name
= get_identifier ("__cxa_guard_release");
6798 abort_name
= get_identifier ("__cxa_guard_abort");
6799 acquire_fn
= identifier_global_value (acquire_name
);
6800 release_fn
= identifier_global_value (release_name
);
6801 abort_fn
= identifier_global_value (abort_name
);
6803 acquire_fn
= push_library_fn
6804 (acquire_name
, build_function_type_list (integer_type_node
,
6805 TREE_TYPE (guard_addr
),
6808 if (!release_fn
|| !abort_fn
)
6809 vfntype
= build_function_type_list (void_type_node
,
6810 TREE_TYPE (guard_addr
),
6813 release_fn
= push_library_fn (release_name
, vfntype
, NULL_TREE
);
6815 abort_fn
= push_library_fn (abort_name
, vfntype
, NULL_TREE
);
6817 inner_if_stmt
= begin_if_stmt ();
6818 finish_if_stmt_cond (build_call_n (acquire_fn
, 1, guard_addr
),
6821 inner_then_clause
= begin_compound_stmt (BCS_NO_SCOPE
);
6822 begin
= get_target_expr (boolean_false_node
);
6823 flag
= TARGET_EXPR_SLOT (begin
);
6825 TARGET_EXPR_CLEANUP (begin
)
6826 = build3 (COND_EXPR
, void_type_node
, flag
,
6828 build_call_n (abort_fn
, 1, guard_addr
));
6829 CLEANUP_EH_ONLY (begin
) = 1;
6831 /* Do the initialization itself. */
6832 init
= add_stmt_to_compound (begin
, init
);
6833 init
= add_stmt_to_compound
6834 (init
, build2 (MODIFY_EXPR
, void_type_node
, flag
, boolean_true_node
));
6835 init
= add_stmt_to_compound
6836 (init
, build_call_n (release_fn
, 1, guard_addr
));
6839 init
= add_stmt_to_compound (init
, set_guard (guard
));
6841 /* Use atexit to register a function for destroying this static
6843 init
= add_stmt_to_compound (init
, register_dtor_fn (decl
));
6845 finish_expr_stmt (init
);
6847 if (flag_threadsafe_statics
)
6849 finish_compound_stmt (inner_then_clause
);
6850 finish_then_clause (inner_if_stmt
);
6851 finish_if_stmt (inner_if_stmt
);
6854 if (!targetm
.relaxed_ordering
|| !flag_threadsafe_statics
)
6856 finish_compound_stmt (then_clause
);
6857 finish_then_clause (if_stmt
);
6858 finish_if_stmt (if_stmt
);
6862 static_aggregates
= tree_cons (init
, decl
, static_aggregates
);
6866 /* Make TYPE a complete type based on INITIAL_VALUE.
6867 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6868 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6869 3 if the initializer list is empty (in pedantic mode). */
6872 cp_complete_array_type (tree
*ptype
, tree initial_value
, bool do_default
)
6875 tree type
, elt_type
;
6879 unsigned HOST_WIDE_INT i
;
6882 /* An array of character type can be initialized from a
6883 brace-enclosed string constant.
6885 FIXME: this code is duplicated from reshape_init. Probably
6886 we should just call reshape_init here? */
6887 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype
)))
6888 && TREE_CODE (initial_value
) == CONSTRUCTOR
6889 && !VEC_empty (constructor_elt
, CONSTRUCTOR_ELTS (initial_value
)))
6891 VEC(constructor_elt
,gc
) *v
= CONSTRUCTOR_ELTS (initial_value
);
6892 tree value
= VEC_index (constructor_elt
, v
, 0)->value
;
6894 if (TREE_CODE (value
) == STRING_CST
6895 && VEC_length (constructor_elt
, v
) == 1)
6896 initial_value
= value
;
6899 /* If any of the elements are parameter packs, we can't actually
6900 complete this type now because the array size is dependent. */
6901 if (TREE_CODE (initial_value
) == CONSTRUCTOR
)
6903 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value
),
6906 if (PACK_EXPANSION_P (value
))
6912 failure
= complete_array_type (ptype
, initial_value
, do_default
);
6914 /* We can create the array before the element type is complete, which
6915 means that we didn't have these two bits set in the original type
6916 either. In completing the type, we are expected to propagate these
6917 bits. See also complete_type which does the same thing for arrays
6920 if (TYPE_DOMAIN (type
))
6922 elt_type
= TREE_TYPE (type
);
6923 TYPE_NEEDS_CONSTRUCTING (type
) = TYPE_NEEDS_CONSTRUCTING (elt_type
);
6924 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
)
6925 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type
);
6931 /* As above, but either give an error or reject zero-size arrays, depending
6935 cp_complete_array_type_or_error (tree
*ptype
, tree initial_value
,
6936 bool do_default
, tsubst_flags_t complain
)
6939 bool sfinae
= !(complain
& tf_error
);
6940 /* In SFINAE context we can't be lenient about zero-size arrays. */
6943 failure
= cp_complete_array_type (ptype
, initial_value
, do_default
);
6949 /* Not an error. */;
6950 else if (failure
== 1)
6951 error ("initializer fails to determine size of %qT", *ptype
);
6952 else if (failure
== 2)
6955 error ("array size missing in %qT", *ptype
);
6957 else if (failure
== 3)
6958 error ("zero-size array %qT", *ptype
);
6959 *ptype
= error_mark_node
;
6964 /* Return zero if something is declared to be a member of type
6965 CTYPE when in the context of CUR_TYPE. STRING is the error
6966 message to print in that case. Otherwise, quietly return 1. */
6969 member_function_or_else (tree ctype
, tree cur_type
, enum overload_flags flags
)
6971 if (ctype
&& ctype
!= cur_type
)
6973 if (flags
== DTOR_FLAG
)
6974 error ("destructor for alien class %qT cannot be a member", ctype
);
6976 error ("constructor for alien class %qT cannot be a member", ctype
);
6982 /* Subroutine of `grokdeclarator'. */
6984 /* Generate errors possibly applicable for a given set of specifiers.
6985 This is for ARM $7.1.2. */
6988 bad_specifiers (tree object
,
6989 enum bad_spec_place type
,
7000 error ("%qD declared as a %<virtual%> variable", object
);
7002 error ("%qD declared as an %<inline%> variable", object
);
7004 error ("%<const%> and %<volatile%> function specifiers on "
7005 "%qD invalid in variable declaration", object
);
7009 error ("%qD declared as a %<virtual%> parameter", object
);
7011 error ("%qD declared as an %<inline%> parameter", object
);
7013 error ("%<const%> and %<volatile%> function specifiers on "
7014 "%qD invalid in parameter declaration", object
);
7018 error ("%qD declared as a %<virtual%> type", object
);
7020 error ("%qD declared as an %<inline%> type", object
);
7022 error ("%<const%> and %<volatile%> function specifiers on "
7023 "%qD invalid in type declaration", object
);
7027 error ("%qD declared as a %<virtual%> field", object
);
7029 error ("%qD declared as an %<inline%> field", object
);
7031 error ("%<const%> and %<volatile%> function specifiers on "
7032 "%qD invalid in field declaration", object
);
7038 error ("%q+D declared as a friend", object
);
7040 && (TREE_CODE (object
) == TYPE_DECL
7041 || (!TYPE_PTRFN_P (TREE_TYPE (object
))
7042 && !TYPE_REFFN_P (TREE_TYPE (object
))
7043 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object
)))))
7044 error ("%q+D declared with an exception specification", object
);
7047 /* DECL is a member function or static data member and is presently
7048 being defined. Check that the definition is taking place in a
7052 check_class_member_definition_namespace (tree decl
)
7054 /* These checks only apply to member functions and static data
7056 gcc_assert (TREE_CODE (decl
) == FUNCTION_DECL
7057 || TREE_CODE (decl
) == VAR_DECL
);
7058 /* We check for problems with specializations in pt.c in
7059 check_specialization_namespace, where we can issue better
7061 if (processing_specialization
)
7063 /* There are no restrictions on the placement of
7064 explicit instantiations. */
7065 if (processing_explicit_instantiation
)
7069 A member function definition that appears outside of the
7070 class definition shall appear in a namespace scope enclosing
7071 the class definition.
7075 The definition for a static data member shall appear in a
7076 namespace scope enclosing the member's class definition. */
7077 if (!is_ancestor (current_namespace
, DECL_CONTEXT (decl
)))
7078 permerror (input_location
, "definition of %qD is not in namespace enclosing %qT",
7079 decl
, DECL_CONTEXT (decl
));
7082 /* Build a PARM_DECL for the "this" parameter. TYPE is the
7083 METHOD_TYPE for a non-static member function; QUALS are the
7084 cv-qualifiers that apply to the function. */
7087 build_this_parm (tree type
, cp_cv_quals quals
)
7092 cp_cv_quals this_quals
;
7094 if (CLASS_TYPE_P (type
))
7097 = cp_build_qualified_type (type
, quals
& ~TYPE_QUAL_RESTRICT
);
7098 this_type
= build_pointer_type (this_type
);
7101 this_type
= type_of_this_parm (type
);
7102 /* The `this' parameter is implicitly `const'; it cannot be
7104 this_quals
= (quals
& TYPE_QUAL_RESTRICT
) | TYPE_QUAL_CONST
;
7105 qual_type
= cp_build_qualified_type (this_type
, this_quals
);
7106 parm
= build_artificial_parm (this_identifier
, qual_type
);
7107 cp_apply_type_quals_to_decl (this_quals
, parm
);
7111 /* DECL is a static member function. Complain if it was declared
7112 with function-cv-quals. */
7115 check_static_quals (tree decl
, cp_cv_quals quals
)
7117 if (quals
!= TYPE_UNQUALIFIED
)
7118 error ("static member function %q#D declared with type qualifiers",
7122 /* CTYPE is class type, or null if non-class.
7123 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
7125 DECLARATOR is the function's name.
7126 PARMS is a chain of PARM_DECLs for the function.
7127 VIRTUALP is truthvalue of whether the function is virtual or not.
7128 FLAGS are to be passed through to `grokclassfn'.
7129 QUALS are qualifiers indicating whether the function is `const'
7131 RAISES is a list of exceptions that this function can raise.
7132 CHECK is 1 if we must find this method in CTYPE, 0 if we should
7133 not look, and -1 if we should not call `grokclassfn' at all.
7135 SFK is the kind of special function (if any) for the new function.
7137 Returns `NULL_TREE' if something goes wrong, after issuing
7138 applicable error messages. */
7141 grokfndecl (tree ctype
,
7145 tree orig_declarator
,
7147 enum overload_flags flags
,
7154 special_function_kind sfk
,
7159 location_t location
)
7162 int staticp
= ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
;
7166 type
= build_exception_variant (type
, raises
);
7168 decl
= build_lang_decl (FUNCTION_DECL
, declarator
, type
);
7170 /* If we have an explicit location, use it, otherwise use whatever
7171 build_lang_decl used (probably input_location). */
7172 if (location
!= UNKNOWN_LOCATION
)
7173 DECL_SOURCE_LOCATION (decl
) = location
;
7175 if (TREE_CODE (type
) == METHOD_TYPE
)
7178 parm
= build_this_parm (type
, quals
);
7179 DECL_CHAIN (parm
) = parms
;
7182 DECL_ARGUMENTS (decl
) = parms
;
7183 for (t
= parms
; t
; t
= DECL_CHAIN (t
))
7184 DECL_CONTEXT (t
) = decl
;
7185 /* Propagate volatile out from type to decl. */
7186 if (TYPE_VOLATILE (type
))
7187 TREE_THIS_VOLATILE (decl
) = 1;
7189 /* Setup decl according to sfk. */
7192 case sfk_constructor
:
7193 case sfk_copy_constructor
:
7194 case sfk_move_constructor
:
7195 DECL_CONSTRUCTOR_P (decl
) = 1;
7197 case sfk_destructor
:
7198 DECL_DESTRUCTOR_P (decl
) = 1;
7204 /* If pointers to member functions use the least significant bit to
7205 indicate whether a function is virtual, ensure a pointer
7206 to this function will have that bit clear. */
7207 if (TARGET_PTRMEMFUNC_VBIT_LOCATION
== ptrmemfunc_vbit_in_pfn
7208 && TREE_CODE (type
) == METHOD_TYPE
7209 && DECL_ALIGN (decl
) < 2 * BITS_PER_UNIT
)
7210 DECL_ALIGN (decl
) = 2 * BITS_PER_UNIT
;
7213 && TREE_CODE (orig_declarator
) == TEMPLATE_ID_EXPR
)
7217 ("defining explicit specialization %qD in friend declaration",
7221 tree fns
= TREE_OPERAND (orig_declarator
, 0);
7222 tree args
= TREE_OPERAND (orig_declarator
, 1);
7224 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7226 /* Something like `template <class T> friend void f<T>()'. */
7227 error ("invalid use of template-id %qD in declaration "
7228 "of primary template",
7234 /* A friend declaration of the form friend void f<>(). Record
7235 the information in the TEMPLATE_ID_EXPR. */
7236 SET_DECL_IMPLICIT_INSTANTIATION (decl
);
7238 if (TREE_CODE (fns
) == COMPONENT_REF
)
7240 /* Due to bison parser ickiness, we will have already looked
7241 up an operator_name or PFUNCNAME within the current class
7242 (see template_id in parse.y). If the current class contains
7243 such a name, we'll get a COMPONENT_REF here. Undo that. */
7245 gcc_assert (TREE_TYPE (TREE_OPERAND (fns
, 0))
7246 == current_class_type
);
7247 fns
= TREE_OPERAND (fns
, 1);
7249 gcc_assert (TREE_CODE (fns
) == IDENTIFIER_NODE
7250 || TREE_CODE (fns
) == OVERLOAD
);
7251 DECL_TEMPLATE_INFO (decl
) = build_template_info (fns
, args
);
7253 for (t
= TYPE_ARG_TYPES (TREE_TYPE (decl
)); t
; t
= TREE_CHAIN (t
))
7254 if (TREE_PURPOSE (t
)
7255 && TREE_CODE (TREE_PURPOSE (t
)) == DEFAULT_ARG
)
7257 error ("default arguments are not allowed in declaration "
7258 "of friend template specialization %qD",
7265 error ("%<inline%> is not allowed in declaration of friend "
7266 "template specialization %qD",
7273 /* If this decl has namespace scope, set that up. */
7275 set_decl_namespace (decl
, in_namespace
, friendp
);
7277 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_decl_namespace ());
7279 /* `main' and builtins have implicit 'C' linkage. */
7280 if ((MAIN_NAME_P (declarator
)
7281 || (IDENTIFIER_LENGTH (declarator
) > 10
7282 && IDENTIFIER_POINTER (declarator
)[0] == '_'
7283 && IDENTIFIER_POINTER (declarator
)[1] == '_'
7284 && strncmp (IDENTIFIER_POINTER (declarator
)+2, "builtin_", 8) == 0))
7285 && current_lang_name
== lang_name_cplusplus
7286 && ctype
== NULL_TREE
7287 && DECL_FILE_SCOPE_P (decl
))
7288 SET_DECL_LANGUAGE (decl
, lang_c
);
7290 /* Should probably propagate const out from type to decl I bet (mrs). */
7293 DECL_STATIC_FUNCTION_P (decl
) = 1;
7294 DECL_CONTEXT (decl
) = ctype
;
7299 DECL_CONTEXT (decl
) = ctype
;
7301 check_class_member_definition_namespace (decl
);
7304 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7306 if (processing_template_decl
)
7307 error ("cannot declare %<::main%> to be a template");
7309 error ("cannot declare %<::main%> to be inline");
7311 error ("cannot declare %<::main%> to be static");
7316 /* Members of anonymous types and local classes have no linkage; make
7317 them internal. If a typedef is made later, this will be changed. */
7318 if (ctype
&& (TYPE_ANONYMOUS_P (ctype
)
7319 || decl_function_context (TYPE_MAIN_DECL (ctype
))))
7322 if (publicp
&& cxx_dialect
== cxx98
)
7324 /* [basic.link]: A name with no linkage (notably, the name of a class
7325 or enumeration declared in a local scope) shall not be used to
7326 declare an entity with linkage.
7328 DR 757 relaxes this restriction for C++0x. */
7329 t
= no_linkage_check (TREE_TYPE (decl
),
7330 /*relaxed_p=*/false);
7333 if (TYPE_ANONYMOUS_P (t
))
7335 if (DECL_EXTERN_C_P (decl
))
7336 /* Allow this; it's pretty common in C. */;
7339 permerror (input_location
, "anonymous type with no linkage "
7340 "used to declare function %q#D with linkage",
7342 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7343 permerror (input_location
, "%q+#D does not refer to the unqualified "
7344 "type, so it is not used for linkage",
7349 permerror (input_location
, "type %qT with no linkage used to "
7350 "declare function %q#D with linkage", t
, decl
);
7354 TREE_PUBLIC (decl
) = publicp
;
7357 DECL_INTERFACE_KNOWN (decl
) = 1;
7358 DECL_NOT_REALLY_EXTERN (decl
) = 1;
7361 /* If the declaration was declared inline, mark it as such. */
7363 DECL_DECLARED_INLINE_P (decl
) = 1;
7365 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
7367 DECL_EXTERNAL (decl
) = 1;
7368 if (quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
7371 ? G_("static member function %qD cannot have cv-qualifier")
7372 : G_("non-member function %qD cannot have cv-qualifier"),
7374 quals
= TYPE_UNQUALIFIED
;
7377 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl
))
7378 && !grok_op_properties (decl
, /*complain=*/true))
7380 else if (UDLIT_OPER_P (DECL_NAME (decl
)))
7382 bool long_long_unsigned_p
;
7384 const char *suffix
= NULL
;
7385 /* [over.literal]/6: Literal operators shall not have C linkage. */
7386 if (DECL_LANGUAGE (decl
) == lang_c
)
7388 error ("literal operator with C linkage");
7392 if (DECL_NAMESPACE_SCOPE_P (decl
))
7394 if (!check_literal_operator_args (decl
, &long_long_unsigned_p
,
7397 error ("%qD has invalid argument list", decl
);
7401 suffix
= UDLIT_OP_SUFFIX (DECL_NAME (decl
));
7402 if (long_long_unsigned_p
)
7404 if (cpp_interpret_int_suffix (suffix
, strlen (suffix
)))
7405 warning (0, "integer suffix %<%s%>"
7406 " shadowed by implementation", suffix
);
7408 else if (long_double_p
)
7410 if (cpp_interpret_float_suffix (suffix
, strlen (suffix
)))
7411 warning (0, "floating point suffix %<%s%>"
7412 " shadowed by implementation", suffix
);
7417 error ("%qD must be a non-member function", decl
);
7423 /* Make the init_value nonzero so pushdecl knows this is not
7424 tentative. error_mark_node is replaced later with the BLOCK. */
7425 DECL_INITIAL (decl
) = error_mark_node
;
7427 if (TYPE_NOTHROW_P (type
) || nothrow_libfn_p (decl
))
7428 TREE_NOTHROW (decl
) = 1;
7430 /* Caller will do the rest of this. */
7434 if (ctype
!= NULL_TREE
)
7435 grokclassfn (ctype
, decl
, flags
);
7437 decl
= check_explicit_specialization (orig_declarator
, decl
,
7440 4 * (friendp
!= 0));
7441 if (decl
== error_mark_node
)
7444 if (DECL_STATIC_FUNCTION_P (decl
))
7445 check_static_quals (decl
, quals
);
7449 cplus_decl_attributes (&decl
, *attrlist
, 0);
7450 *attrlist
= NULL_TREE
;
7453 /* Check main's type after attributes have been applied. */
7454 if (ctype
== NULL_TREE
&& DECL_MAIN_P (decl
))
7456 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl
)),
7459 tree oldtypeargs
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
7461 error ("%<::main%> must return %<int%>");
7462 newtype
= build_function_type (integer_type_node
, oldtypeargs
);
7463 TREE_TYPE (decl
) = newtype
;
7466 check_main_parameter_types (decl
);
7469 if (ctype
!= NULL_TREE
7470 && (! TYPE_FOR_JAVA (ctype
) || check_java_method (decl
))
7473 tree old_decl
= check_classfn (ctype
, decl
,
7474 (processing_template_decl
7475 > template_class_depth (ctype
))
7476 ? current_template_parms
7479 if (old_decl
== error_mark_node
)
7487 if (TREE_CODE (old_decl
) == TEMPLATE_DECL
)
7488 /* Because grokfndecl is always supposed to return a
7489 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7490 here. We depend on our callers to figure out that its
7491 really a template that's being returned. */
7492 old_decl
= DECL_TEMPLATE_RESULT (old_decl
);
7494 if (DECL_STATIC_FUNCTION_P (old_decl
)
7495 && TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
)
7497 /* Remove the `this' parm added by grokclassfn. */
7498 revert_static_member_fn (decl
);
7499 check_static_quals (decl
, quals
);
7501 if (DECL_ARTIFICIAL (old_decl
))
7503 error ("definition of implicitly-declared %qD", old_decl
);
7506 else if (DECL_DEFAULTED_FN (old_decl
))
7508 error ("definition of explicitly-defaulted %q+D", decl
);
7509 error ("%q+#D explicitly defaulted here", old_decl
);
7513 /* Since we've smashed OLD_DECL to its
7514 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7515 if (TREE_CODE (decl
) == TEMPLATE_DECL
)
7516 decl
= DECL_TEMPLATE_RESULT (decl
);
7518 /* Attempt to merge the declarations. This can fail, in
7519 the case of some invalid specialization declarations. */
7520 pushed_scope
= push_scope (ctype
);
7521 ok
= duplicate_decls (decl
, old_decl
, friendp
);
7523 pop_scope (pushed_scope
);
7526 error ("no %q#D member function declared in class %qT",
7534 if (DECL_CONSTRUCTOR_P (decl
) && !grok_ctor_properties (ctype
, decl
))
7537 if (ctype
== NULL_TREE
|| check
)
7541 DECL_VIRTUAL_P (decl
) = 1;
7546 /* decl is a FUNCTION_DECL.
7547 specifiers are the parsed virt-specifiers.
7549 Set flags to reflect the virt-specifiers.
7554 set_virt_specifiers (tree decl
, cp_virt_specifiers specifiers
)
7556 if (decl
== NULL_TREE
)
7558 if (specifiers
& VIRT_SPEC_OVERRIDE
)
7559 DECL_OVERRIDE_P (decl
) = 1;
7560 if (specifiers
& VIRT_SPEC_FINAL
)
7561 DECL_FINAL_P (decl
) = 1;
7565 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7566 the linkage that DECL will receive in the object file. */
7569 set_linkage_for_static_data_member (tree decl
)
7571 /* A static data member always has static storage duration and
7572 external linkage. Note that static data members are forbidden in
7573 local classes -- the only situation in which a class has
7574 non-external linkage. */
7575 TREE_PUBLIC (decl
) = 1;
7576 TREE_STATIC (decl
) = 1;
7577 /* For non-template classes, static data members are always put
7578 out in exactly those files where they are defined, just as
7579 with ordinary namespace-scope variables. */
7580 if (!processing_template_decl
)
7581 DECL_INTERFACE_KNOWN (decl
) = 1;
7584 /* Create a VAR_DECL named NAME with the indicated TYPE.
7586 If SCOPE is non-NULL, it is the class type or namespace containing
7587 the variable. If SCOPE is NULL, the variable should is created in
7588 the innermost enclosings scope. */
7591 grokvardecl (tree type
,
7593 const cp_decl_specifier_seq
*declspecs
,
7599 tree explicit_scope
;
7601 gcc_assert (!name
|| TREE_CODE (name
) == IDENTIFIER_NODE
);
7603 /* Compute the scope in which to place the variable, but remember
7604 whether or not that scope was explicitly specified by the user. */
7605 explicit_scope
= scope
;
7608 /* An explicit "extern" specifier indicates a namespace-scope
7610 if (declspecs
->storage_class
== sc_extern
)
7611 scope
= current_decl_namespace ();
7612 else if (!at_function_scope_p ())
7613 scope
= current_scope ();
7617 && (/* If the variable is a namespace-scope variable declared in a
7618 template, we need DECL_LANG_SPECIFIC. */
7619 (TREE_CODE (scope
) == NAMESPACE_DECL
&& processing_template_decl
)
7620 /* Similarly for namespace-scope variables with language linkage
7622 || (TREE_CODE (scope
) == NAMESPACE_DECL
7623 && current_lang_name
!= lang_name_cplusplus
)
7624 /* Similarly for static data members. */
7626 decl
= build_lang_decl (VAR_DECL
, name
, type
);
7628 decl
= build_decl (input_location
, VAR_DECL
, name
, type
);
7630 if (explicit_scope
&& TREE_CODE (explicit_scope
) == NAMESPACE_DECL
)
7631 set_decl_namespace (decl
, explicit_scope
, 0);
7633 DECL_CONTEXT (decl
) = FROB_CONTEXT (scope
);
7635 if (declspecs
->storage_class
== sc_extern
)
7637 DECL_THIS_EXTERN (decl
) = 1;
7638 DECL_EXTERNAL (decl
) = !initialized
;
7641 if (DECL_CLASS_SCOPE_P (decl
))
7643 set_linkage_for_static_data_member (decl
);
7644 /* This function is only called with out-of-class definitions. */
7645 DECL_EXTERNAL (decl
) = 0;
7646 check_class_member_definition_namespace (decl
);
7648 /* At top level, either `static' or no s.c. makes a definition
7649 (perhaps tentative), and absence of `static' makes it public. */
7650 else if (toplevel_bindings_p ())
7652 TREE_PUBLIC (decl
) = (declspecs
->storage_class
!= sc_static
7653 && (DECL_THIS_EXTERN (decl
) || ! constp
));
7654 TREE_STATIC (decl
) = ! DECL_EXTERNAL (decl
);
7656 /* Not at top level, only `static' makes a static definition. */
7659 TREE_STATIC (decl
) = declspecs
->storage_class
== sc_static
;
7660 TREE_PUBLIC (decl
) = DECL_EXTERNAL (decl
);
7663 if (declspecs
->specs
[(int)ds_thread
])
7664 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
7666 /* If the type of the decl has no linkage, make sure that we'll
7667 notice that in mark_used. */
7668 if (cxx_dialect
> cxx98
7669 && decl_linkage (decl
) != lk_none
7670 && DECL_LANG_SPECIFIC (decl
) == NULL
7671 && !DECL_EXTERN_C_P (decl
)
7672 && no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false))
7673 retrofit_lang_decl (decl
);
7675 if (TREE_PUBLIC (decl
))
7677 /* [basic.link]: A name with no linkage (notably, the name of a class
7678 or enumeration declared in a local scope) shall not be used to
7679 declare an entity with linkage.
7681 DR 757 relaxes this restriction for C++0x. */
7682 tree t
= (cxx_dialect
> cxx98
? NULL_TREE
7683 : no_linkage_check (TREE_TYPE (decl
), /*relaxed_p=*/false));
7686 if (TYPE_ANONYMOUS_P (t
))
7688 if (DECL_EXTERN_C_P (decl
))
7689 /* Allow this; it's pretty common in C. */
7693 /* DRs 132, 319 and 389 seem to indicate types with
7694 no linkage can only be used to declare extern "C"
7695 entities. Since it's not always an error in the
7696 ISO C++ 90 Standard, we only issue a warning. */
7697 warning (0, "anonymous type with no linkage used to declare "
7698 "variable %q#D with linkage", decl
);
7699 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t
)))
7700 warning (0, "%q+#D does not refer to the unqualified "
7701 "type, so it is not used for linkage",
7706 warning (0, "type %qT with no linkage used to declare variable "
7707 "%q#D with linkage", t
, decl
);
7711 DECL_INTERFACE_KNOWN (decl
) = 1;
7716 /* Create and return a canonical pointer to member function type, for
7717 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7720 build_ptrmemfunc_type (tree type
)
7724 tree unqualified_variant
= NULL_TREE
;
7726 if (type
== error_mark_node
)
7729 /* If a canonical type already exists for this type, use it. We use
7730 this method instead of type_hash_canon, because it only does a
7731 simple equality check on the list of field members. */
7733 if ((t
= TYPE_GET_PTRMEMFUNC_TYPE (type
)))
7736 /* Make sure that we always have the unqualified pointer-to-member
7738 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7740 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type
));
7742 t
= make_class_type (RECORD_TYPE
);
7743 xref_basetypes (t
, NULL_TREE
);
7745 /* Let the front end know this is a pointer to member function... */
7746 TYPE_PTRMEMFUNC_FLAG (t
) = 1;
7747 /* ... and not really a class type. */
7748 SET_CLASS_TYPE_P (t
, 0);
7750 field
= build_decl (input_location
, FIELD_DECL
, pfn_identifier
, type
);
7753 field
= build_decl (input_location
, FIELD_DECL
, delta_identifier
,
7755 DECL_CHAIN (field
) = fields
;
7758 finish_builtin_struct (t
, "__ptrmemfunc_type", fields
, ptr_type_node
);
7760 /* Zap out the name so that the back end will give us the debugging
7761 information for this anonymous RECORD_TYPE. */
7762 TYPE_NAME (t
) = NULL_TREE
;
7764 /* If this is not the unqualified form of this pointer-to-member
7765 type, set the TYPE_MAIN_VARIANT for this type to be the
7766 unqualified type. Since they are actually RECORD_TYPEs that are
7767 not variants of each other, we must do this manually.
7768 As we just built a new type there is no need to do yet another copy. */
7769 if (cp_type_quals (type
) != TYPE_UNQUALIFIED
)
7771 int type_quals
= cp_type_quals (type
);
7772 TYPE_READONLY (t
) = (type_quals
& TYPE_QUAL_CONST
) != 0;
7773 TYPE_VOLATILE (t
) = (type_quals
& TYPE_QUAL_VOLATILE
) != 0;
7774 TYPE_RESTRICT (t
) = (type_quals
& TYPE_QUAL_RESTRICT
) != 0;
7775 TYPE_MAIN_VARIANT (t
) = unqualified_variant
;
7776 TYPE_NEXT_VARIANT (t
) = TYPE_NEXT_VARIANT (unqualified_variant
);
7777 TYPE_NEXT_VARIANT (unqualified_variant
) = t
;
7778 TREE_TYPE (TYPE_BINFO (t
)) = t
;
7781 /* Cache this pointer-to-member type so that we can find it again
7783 TYPE_SET_PTRMEMFUNC_TYPE (type
, t
);
7785 if (TYPE_STRUCTURAL_EQUALITY_P (type
))
7786 SET_TYPE_STRUCTURAL_EQUALITY (t
);
7787 else if (TYPE_CANONICAL (type
) != type
)
7788 TYPE_CANONICAL (t
) = build_ptrmemfunc_type (TYPE_CANONICAL (type
));
7793 /* Create and return a pointer to data member type. */
7796 build_ptrmem_type (tree class_type
, tree member_type
)
7798 if (TREE_CODE (member_type
) == METHOD_TYPE
)
7800 cp_cv_quals quals
= type_memfn_quals (member_type
);
7801 member_type
= build_memfn_type (member_type
, class_type
, quals
);
7802 return build_ptrmemfunc_type (build_pointer_type (member_type
));
7806 gcc_assert (TREE_CODE (member_type
) != FUNCTION_TYPE
);
7807 return build_offset_type (class_type
, member_type
);
7811 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7812 Check to see that the definition is valid. Issue appropriate error
7813 messages. Return 1 if the definition is particularly bad, or 0
7817 check_static_variable_definition (tree decl
, tree type
)
7819 /* Can't check yet if we don't know the type. */
7820 if (dependent_type_p (type
))
7822 /* If DECL is declared constexpr, we'll do the appropriate checks
7823 in check_initializer. */
7824 if (DECL_P (decl
) && DECL_DECLARED_CONSTEXPR_P (decl
))
7826 else if (cxx_dialect
>= cxx0x
&& !INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7828 if (!COMPLETE_TYPE_P (type
))
7829 error ("in-class initialization of static data member %q#D of "
7830 "incomplete type", decl
);
7831 else if (literal_type_p (type
))
7832 permerror (input_location
,
7833 "%<constexpr%> needed for in-class initialization of "
7834 "static data member %q#D of non-integral type", decl
);
7836 error ("in-class initialization of static data member %q#D of "
7837 "non-literal type", decl
);
7841 /* Motion 10 at San Diego: If a static const integral data member is
7842 initialized with an integral constant expression, the initializer
7843 may appear either in the declaration (within the class), or in
7844 the definition, but not both. If it appears in the class, the
7845 member is a member constant. The file-scope definition is always
7847 if (!ARITHMETIC_TYPE_P (type
) && TREE_CODE (type
) != ENUMERAL_TYPE
)
7849 error ("invalid in-class initialization of static data member "
7850 "of non-integral type %qT",
7854 else if (!CP_TYPE_CONST_P (type
))
7855 error ("ISO C++ forbids in-class initialization of non-const "
7856 "static member %qD",
7858 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type
))
7859 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids initialization of member constant "
7860 "%qD of non-integral type %qT", decl
, type
);
7865 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7866 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7867 expressions out into temporary variables so that walk_tree doesn't
7868 step into them (c++/15764). */
7871 stabilize_save_expr_r (tree
*expr_p
, int *walk_subtrees
, void *data
)
7873 struct pointer_set_t
*pset
= (struct pointer_set_t
*)data
;
7874 tree expr
= *expr_p
;
7875 if (TREE_CODE (expr
) == SAVE_EXPR
)
7877 tree op
= TREE_OPERAND (expr
, 0);
7878 cp_walk_tree (&op
, stabilize_save_expr_r
, data
, pset
);
7879 if (TREE_SIDE_EFFECTS (op
))
7880 TREE_OPERAND (expr
, 0) = get_temp_regvar (TREE_TYPE (op
), op
);
7883 else if (!EXPR_P (expr
) || !TREE_SIDE_EFFECTS (expr
))
7888 /* Entry point for the above. */
7891 stabilize_vla_size (tree size
)
7893 struct pointer_set_t
*pset
= pointer_set_create ();
7894 /* Break out any function calls into temporary variables. */
7895 cp_walk_tree (&size
, stabilize_save_expr_r
, pset
, pset
);
7898 /* Given the SIZE (i.e., number of elements) in an array, compute an
7899 appropriate index type for the array. If non-NULL, NAME is the
7900 name of the thing being declared. */
7903 compute_array_index_type (tree name
, tree size
, tsubst_flags_t complain
)
7908 tree abi_1_itype
= NULL_TREE
;
7910 if (error_operand_p (size
))
7911 return error_mark_node
;
7913 type
= TREE_TYPE (size
);
7914 /* type_dependent_expression_p? */
7915 if (!dependent_type_p (type
))
7917 mark_rvalue_use (size
);
7919 if (cxx_dialect
< cxx0x
&& TREE_CODE (size
) == NOP_EXPR
7920 && TREE_SIDE_EFFECTS (size
))
7921 /* In C++98, we mark a non-constant array bound with a magic
7922 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7925 size
= fold_non_dependent_expr (size
);
7927 if (CLASS_TYPE_P (type
)
7928 && CLASSTYPE_LITERAL_P (type
))
7930 size
= build_expr_type_conversion (WANT_INT
, size
, true);
7933 if (!(complain
& tf_error
))
7934 return error_mark_node
;
7936 error ("size of array %qD has non-integral type %qT",
7939 error ("size of array has non-integral type %qT", type
);
7940 size
= integer_one_node
;
7942 if (size
== error_mark_node
)
7943 return error_mark_node
;
7944 type
= TREE_TYPE (size
);
7945 /* We didn't support this case in GCC 3.2, so don't bother
7946 trying to model it now in ABI v1. */
7947 abi_1_itype
= error_mark_node
;
7950 size
= maybe_constant_value (size
);
7951 if (!TREE_CONSTANT (size
))
7955 if (error_operand_p (size
))
7956 return error_mark_node
;
7958 /* The array bound must be an integer type. */
7959 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type
))
7961 if (!(complain
& tf_error
))
7962 return error_mark_node
;
7964 error ("size of array %qD has non-integral type %qT", name
, type
);
7966 error ("size of array has non-integral type %qT", type
);
7967 size
= integer_one_node
;
7968 type
= TREE_TYPE (size
);
7972 /* A type is dependent if it is...an array type constructed from any
7973 dependent type or whose size is specified by a constant expression
7974 that is value-dependent. */
7975 /* We can only call value_dependent_expression_p on integral constant
7976 expressions; treat non-constant expressions as dependent, too. */
7977 if (processing_template_decl
7978 && (dependent_type_p (type
)
7979 || !TREE_CONSTANT (size
) || value_dependent_expression_p (size
)))
7981 /* We cannot do any checking for a SIZE that isn't known to be
7982 constant. Just build the index type and mark that it requires
7983 structural equality checks. */
7984 itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
7985 size
, integer_one_node
));
7986 TYPE_DEPENDENT_P (itype
) = 1;
7987 TYPE_DEPENDENT_P_VALID (itype
) = 1;
7988 SET_TYPE_STRUCTURAL_EQUALITY (itype
);
7992 if (!abi_version_at_least (2) && processing_template_decl
7993 && abi_1_itype
== NULL_TREE
)
7994 /* For abi-1, we handled all instances in templates the same way,
7995 even when they were non-dependent. This affects the manglings
7996 produced. So, we do the normal checking for non-dependent
7997 sizes, but at the end we'll return the same type that abi-1
7998 would have, but with TYPE_CANONICAL set to the "right"
7999 value that the current ABI would provide. */
8000 abi_1_itype
= build_index_type (build_min (MINUS_EXPR
, sizetype
,
8001 osize
, integer_one_node
));
8003 /* Normally, the array-bound will be a constant. */
8004 if (TREE_CODE (size
) == INTEGER_CST
)
8006 /* Check to see if the array bound overflowed. Make that an
8007 error, no matter how generous we're being. */
8008 constant_expression_error (size
);
8010 /* An array must have a positive number of elements. */
8011 if (INT_CST_LT (size
, integer_zero_node
))
8013 if (!(complain
& tf_error
))
8014 return error_mark_node
;
8016 error ("size of array %qD is negative", name
);
8018 error ("size of array is negative");
8019 size
= integer_one_node
;
8021 /* As an extension we allow zero-sized arrays. */
8022 else if (integer_zerop (size
))
8024 if (!(complain
& tf_error
))
8025 /* We must fail if performing argument deduction (as
8026 indicated by the state of complain), so that
8027 another substitution can be found. */
8028 return error_mark_node
;
8029 else if (in_system_header
)
8030 /* Allow them in system headers because glibc uses them. */;
8032 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array %qD", name
);
8034 pedwarn (input_location
, OPT_pedantic
, "ISO C++ forbids zero-size array");
8037 else if (TREE_CONSTANT (size
)
8038 /* We don't allow VLAs at non-function scopes, or during
8039 tentative template substitution. */
8040 || !at_function_scope_p () || !(complain
& tf_error
))
8042 if (!(complain
& tf_error
))
8043 return error_mark_node
;
8044 /* `(int) &fn' is not a valid array bound. */
8046 error ("size of array %qD is not an integral constant-expression",
8049 error ("size of array is not an integral constant-expression");
8050 size
= integer_one_node
;
8052 else if (pedantic
&& warn_vla
!= 0)
8055 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array %qD", name
);
8057 pedwarn (input_location
, OPT_Wvla
, "ISO C++ forbids variable length array");
8059 else if (warn_vla
> 0)
8063 "variable length array %qD is used", name
);
8066 "variable length array is used");
8069 if (processing_template_decl
&& !TREE_CONSTANT (size
))
8070 /* A variable sized array. */
8071 itype
= build_min (MINUS_EXPR
, sizetype
, size
, integer_one_node
);
8074 HOST_WIDE_INT saved_processing_template_decl
;
8076 /* Compute the index of the largest element in the array. It is
8077 one less than the number of elements in the array. We save
8078 and restore PROCESSING_TEMPLATE_DECL so that computations in
8079 cp_build_binary_op will be appropriately folded. */
8080 saved_processing_template_decl
= processing_template_decl
;
8081 processing_template_decl
= 0;
8082 itype
= cp_build_binary_op (input_location
,
8084 cp_convert (ssizetype
, size
),
8085 cp_convert (ssizetype
, integer_one_node
),
8086 tf_warning_or_error
);
8087 itype
= fold (itype
);
8088 processing_template_decl
= saved_processing_template_decl
;
8090 if (!TREE_CONSTANT (itype
))
8091 /* A variable sized array. */
8092 itype
= variable_size (itype
);
8093 /* Make sure that there was no overflow when creating to a signed
8094 index type. (For example, on a 32-bit machine, an array with
8095 size 2^32 - 1 is too big.) */
8096 else if (TREE_CODE (itype
) == INTEGER_CST
8097 && TREE_OVERFLOW (itype
))
8099 if (!(complain
& tf_error
))
8100 return error_mark_node
;
8101 error ("overflow in array dimension");
8102 TREE_OVERFLOW (itype
) = 0;
8106 /* Create and return the appropriate index type. */
8107 if (abi_1_itype
&& abi_1_itype
!= error_mark_node
)
8109 tree t
= build_index_type (itype
);
8110 TYPE_CANONICAL (abi_1_itype
) = TYPE_CANONICAL (t
);
8111 itype
= abi_1_itype
;
8114 itype
= build_index_type (itype
);
8116 /* If the index type were dependent, we would have returned early, so
8117 remember that it isn't. */
8118 TYPE_DEPENDENT_P (itype
) = 0;
8119 TYPE_DEPENDENT_P_VALID (itype
) = 1;
8123 /* Returns the scope (if any) in which the entity declared by
8124 DECLARATOR will be located. If the entity was declared with an
8125 unqualified name, NULL_TREE is returned. */
8128 get_scope_of_declarator (const cp_declarator
*declarator
)
8130 while (declarator
&& declarator
->kind
!= cdk_id
)
8131 declarator
= declarator
->declarator
;
8133 /* If the declarator-id is a SCOPE_REF, the scope in which the
8134 declaration occurs is the first operand. */
8136 && declarator
->u
.id
.qualifying_scope
)
8137 return declarator
->u
.id
.qualifying_scope
;
8139 /* Otherwise, the declarator is not a qualified name; the entity will
8140 be declared in the current scope. */
8144 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
8145 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
8149 create_array_type_for_decl (tree name
, tree type
, tree size
)
8151 tree itype
= NULL_TREE
;
8153 /* If things have already gone awry, bail now. */
8154 if (type
== error_mark_node
|| size
== error_mark_node
)
8155 return error_mark_node
;
8157 /* 8.3.4/1: If the type of the identifier of D contains the auto
8158 type-specifier, the program is ill-formed. */
8159 if (pedantic
&& type_uses_auto (type
))
8160 pedwarn (input_location
, OPT_pedantic
,
8161 "declaration of %qD as array of %<auto%>", name
);
8163 /* If there are some types which cannot be array elements,
8164 issue an error-message and return. */
8165 switch (TREE_CODE (type
))
8169 error ("declaration of %qD as array of void", name
);
8171 error ("creating array of void");
8172 return error_mark_node
;
8176 error ("declaration of %qD as array of functions", name
);
8178 error ("creating array of functions");
8179 return error_mark_node
;
8181 case REFERENCE_TYPE
:
8183 error ("declaration of %qD as array of references", name
);
8185 error ("creating array of references");
8186 return error_mark_node
;
8190 error ("declaration of %qD as array of function members", name
);
8192 error ("creating array of function members");
8193 return error_mark_node
;
8201 The constant expressions that specify the bounds of the arrays
8202 can be omitted only for the first member of the sequence. */
8203 if (TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
))
8206 error ("declaration of %qD as multidimensional array must "
8207 "have bounds for all dimensions except the first",
8210 error ("multidimensional array must have bounds for all "
8211 "dimensions except the first");
8213 return error_mark_node
;
8216 /* Figure out the index type for the array. */
8218 itype
= compute_array_index_type (name
, size
, tf_warning_or_error
);
8221 T is called the array element type; this type shall not be [...] an
8222 abstract class type. */
8223 abstract_virtuals_error (name
, type
);
8225 return build_cplus_array_type (type
, itype
);
8228 /* Check that it's OK to declare a function with the indicated TYPE.
8229 SFK indicates the kind of special function (if any) that this
8230 function is. OPTYPE is the type given in a conversion operator
8231 declaration, or the class type for a constructor/destructor.
8232 Returns the actual return type of the function; that
8233 may be different than TYPE if an error occurs, or for certain
8234 special functions. */
8237 check_special_function_return_type (special_function_kind sfk
,
8243 case sfk_constructor
:
8245 error ("return type specification for constructor invalid");
8247 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8248 type
= build_pointer_type (optype
);
8250 type
= void_type_node
;
8253 case sfk_destructor
:
8255 error ("return type specification for destructor invalid");
8256 /* We can't use the proper return type here because we run into
8257 problems with ambiguous bases and covariant returns.
8258 Java classes are left unchanged because (void *) isn't a valid
8259 Java type, and we don't want to change the Java ABI. */
8260 if (targetm
.cxx
.cdtor_returns_this () && !TYPE_FOR_JAVA (optype
))
8261 type
= build_pointer_type (void_type_node
);
8263 type
= void_type_node
;
8266 case sfk_conversion
:
8268 error ("return type specified for %<operator %T%>", optype
);
8279 /* A variable or data member (whose unqualified name is IDENTIFIER)
8280 has been declared with the indicated TYPE. If the TYPE is not
8281 acceptable, issue an error message and return a type to use for
8282 error-recovery purposes. */
8285 check_var_type (tree identifier
, tree type
)
8287 if (VOID_TYPE_P (type
))
8290 error ("unnamed variable or field declared void");
8291 else if (TREE_CODE (identifier
) == IDENTIFIER_NODE
)
8293 gcc_assert (!IDENTIFIER_OPNAME_P (identifier
));
8294 error ("variable or field %qE declared void", identifier
);
8297 error ("variable or field declared void");
8298 type
= error_mark_node
;
8304 /* Given declspecs and a declarator (abstract or otherwise), determine
8305 the name and type of the object declared and construct a DECL node
8308 DECLSPECS points to the representation of declaration-specifier
8309 sequence that precedes declarator.
8311 DECL_CONTEXT says which syntactic context this declaration is in:
8312 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8313 FUNCDEF for a function definition. Like NORMAL but a few different
8314 error messages in each case. Return value may be zero meaning
8315 this definition is too screwy to try to parse.
8316 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8317 handle member functions (which have FIELD context).
8318 Return value may be zero meaning this definition is too screwy to
8320 PARM for a parameter declaration (either within a function prototype
8321 or before a function body). Make a PARM_DECL, or return void_type_node.
8322 TPARM for a template parameter declaration.
8323 CATCHPARM for a parameter declaration before a catch clause.
8324 TYPENAME if for a typename (in a cast or sizeof).
8325 Don't make a DECL node; just return the ..._TYPE node.
8326 FIELD for a struct or union field; make a FIELD_DECL.
8327 BITFIELD for a field with specified width.
8329 INITIALIZED is as for start_decl.
8331 ATTRLIST is a pointer to the list of attributes, which may be NULL
8332 if there are none; *ATTRLIST may be modified if attributes from inside
8333 the declarator should be applied to the declaration.
8335 When this function is called, scoping variables (such as
8336 CURRENT_CLASS_TYPE) should reflect the scope in which the
8337 declaration occurs, not the scope in which the new declaration will
8338 be placed. For example, on:
8342 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8345 Returns a DECL (if a declarator is present), a TYPE (if there is no
8346 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8350 grokdeclarator (const cp_declarator
*declarator
,
8351 const cp_decl_specifier_seq
*declspecs
,
8352 enum decl_context decl_context
,
8356 tree type
= NULL_TREE
;
8358 int explicit_int128
= 0;
8359 int virtualp
, explicitp
, friendp
, inlinep
, staticp
;
8360 int explicit_int
= 0;
8361 int explicit_char
= 0;
8362 int defaulted_int
= 0;
8363 tree dependent_name
= NULL_TREE
;
8365 tree typedef_decl
= NULL_TREE
;
8366 const char *name
= NULL
;
8367 tree typedef_type
= NULL_TREE
;
8368 /* True if this declarator is a function definition. */
8369 bool funcdef_flag
= false;
8370 cp_declarator_kind innermost_code
= cdk_error
;
8373 /* See the code below that used this. */
8374 tree decl_attr
= NULL_TREE
;
8377 /* Keep track of what sort of function is being processed
8378 so that we can warn about default return values, or explicit
8379 return values which do not match prescribed defaults. */
8380 special_function_kind sfk
= sfk_none
;
8382 tree dname
= NULL_TREE
;
8383 tree ctor_return_type
= NULL_TREE
;
8384 enum overload_flags flags
= NO_SPECIAL
;
8385 /* cv-qualifiers that apply to the declarator, for a declaration of
8386 a member function. */
8387 cp_cv_quals memfn_quals
= TYPE_UNQUALIFIED
;
8388 /* virt-specifiers that apply to the declarator, for a declaration of
8389 a member function. */
8390 cp_virt_specifiers virt_specifiers
= VIRT_SPEC_UNSPECIFIED
;
8391 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8393 tree raises
= NULL_TREE
;
8394 int template_count
= 0;
8395 tree returned_attrs
= NULL_TREE
;
8396 tree parms
= NULL_TREE
;
8397 const cp_declarator
*id_declarator
;
8398 /* The unqualified name of the declarator; either an
8399 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8400 tree unqualified_id
;
8401 /* The class type, if any, in which this entity is located,
8402 or NULL_TREE if none. Note that this value may be different from
8403 the current class type; for example if an attempt is made to declare
8404 "A::f" inside "B", this value will be "A". */
8405 tree ctype
= current_class_type
;
8406 /* The NAMESPACE_DECL for the namespace in which this entity is
8407 located. If an unqualified name is used to declare the entity,
8408 this value will be NULL_TREE, even if the entity is located at
8410 tree in_namespace
= NULL_TREE
;
8411 cp_storage_class storage_class
;
8412 bool unsigned_p
, signed_p
, short_p
, long_p
, thread_p
;
8413 bool type_was_error_mark_node
= false;
8414 bool parameter_pack_p
= declarator
? declarator
->parameter_pack_p
: false;
8415 bool template_type_arg
= false;
8416 bool template_parm_flag
= false;
8417 bool constexpr_p
= declspecs
->specs
[(int) ds_constexpr
];
8420 signed_p
= declspecs
->specs
[(int)ds_signed
];
8421 unsigned_p
= declspecs
->specs
[(int)ds_unsigned
];
8422 short_p
= declspecs
->specs
[(int)ds_short
];
8423 long_p
= declspecs
->specs
[(int)ds_long
];
8424 longlong
= declspecs
->specs
[(int)ds_long
] >= 2;
8425 explicit_int128
= declspecs
->explicit_int128_p
;
8426 thread_p
= declspecs
->specs
[(int)ds_thread
];
8428 if (decl_context
== FUNCDEF
)
8429 funcdef_flag
= true, decl_context
= NORMAL
;
8430 else if (decl_context
== MEMFUNCDEF
)
8431 funcdef_flag
= true, decl_context
= FIELD
;
8432 else if (decl_context
== BITFIELD
)
8433 bitfield
= 1, decl_context
= FIELD
;
8434 else if (decl_context
== TEMPLATE_TYPE_ARG
)
8435 template_type_arg
= true, decl_context
= TYPENAME
;
8436 else if (decl_context
== TPARM
)
8437 template_parm_flag
= true, decl_context
= PARM
;
8439 if (initialized
> 1)
8440 funcdef_flag
= true;
8442 /* Look inside a declarator for the name being declared
8443 and get it as a string, for an error message. */
8444 for (id_declarator
= declarator
;
8446 id_declarator
= id_declarator
->declarator
)
8448 if (id_declarator
->kind
!= cdk_id
)
8449 innermost_code
= id_declarator
->kind
;
8451 switch (id_declarator
->kind
)
8454 if (id_declarator
->declarator
8455 && id_declarator
->declarator
->kind
== cdk_id
)
8457 sfk
= id_declarator
->declarator
->u
.id
.sfk
;
8458 if (sfk
== sfk_destructor
)
8465 tree qualifying_scope
= id_declarator
->u
.id
.qualifying_scope
;
8466 tree decl
= id_declarator
->u
.id
.unqualified_name
;
8469 if (qualifying_scope
)
8471 if (at_function_scope_p ())
8475 A declarator-id shall not be qualified except
8478 None of the cases are permitted in block
8480 if (qualifying_scope
== global_namespace
)
8481 error ("invalid use of qualified-name %<::%D%>",
8483 else if (TYPE_P (qualifying_scope
))
8484 error ("invalid use of qualified-name %<%T::%D%>",
8485 qualifying_scope
, decl
);
8487 error ("invalid use of qualified-name %<%D::%D%>",
8488 qualifying_scope
, decl
);
8489 return error_mark_node
;
8491 else if (TYPE_P (qualifying_scope
))
8493 ctype
= qualifying_scope
;
8494 if (!MAYBE_CLASS_TYPE_P (ctype
))
8496 error ("%q#T is not a class or a namespace", ctype
);
8499 else if (innermost_code
!= cdk_function
8500 && current_class_type
8501 && !UNIQUELY_DERIVED_FROM_P (ctype
,
8502 current_class_type
))
8504 error ("type %qT is not derived from type %qT",
8505 ctype
, current_class_type
);
8506 return error_mark_node
;
8509 else if (TREE_CODE (qualifying_scope
) == NAMESPACE_DECL
)
8510 in_namespace
= qualifying_scope
;
8512 switch (TREE_CODE (decl
))
8518 if (innermost_code
!= cdk_function
)
8520 error ("declaration of %qD as non-function", decl
);
8521 return error_mark_node
;
8523 else if (!qualifying_scope
8524 && !(current_class_type
&& at_class_scope_p ()))
8526 error ("declaration of %qD as non-member", decl
);
8527 return error_mark_node
;
8530 type
= TREE_OPERAND (decl
, 0);
8532 type
= constructor_name (type
);
8533 name
= identifier_to_locale (IDENTIFIER_POINTER (type
));
8538 case TEMPLATE_ID_EXPR
:
8540 tree fns
= TREE_OPERAND (decl
, 0);
8543 if (TREE_CODE (dname
) != IDENTIFIER_NODE
)
8545 gcc_assert (is_overloaded_fn (dname
));
8546 dname
= DECL_NAME (get_first_fn (dname
));
8551 case IDENTIFIER_NODE
:
8552 if (TREE_CODE (decl
) == IDENTIFIER_NODE
)
8555 if (C_IS_RESERVED_WORD (dname
))
8557 error ("declarator-id missing; using reserved word %qD",
8559 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8561 else if (!IDENTIFIER_TYPENAME_P (dname
))
8562 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8565 gcc_assert (flags
== NO_SPECIAL
);
8566 flags
= TYPENAME_FLAG
;
8567 ctor_return_type
= TREE_TYPE (dname
);
8568 sfk
= sfk_conversion
;
8569 if (is_typename_at_global_scope (dname
))
8570 name
= identifier_to_locale (IDENTIFIER_POINTER (dname
));
8572 name
= "<invalid operator>";
8589 return error_mark_node
;
8594 if (id_declarator
->kind
== cdk_id
)
8600 The declarator in a function-definition shall have the form
8601 D1 ( parameter-declaration-clause) ... */
8602 if (funcdef_flag
&& innermost_code
!= cdk_function
)
8604 error ("function definition does not declare parameters");
8605 return error_mark_node
;
8608 if (((dname
&& IDENTIFIER_OPNAME_P (dname
)) || flags
== TYPENAME_FLAG
)
8609 && innermost_code
!= cdk_function
8610 && ! (ctype
&& !declspecs
->any_specifiers_p
))
8612 error ("declaration of %qD as non-function", dname
);
8613 return error_mark_node
;
8617 && TREE_CODE (dname
) == IDENTIFIER_NODE
8618 && UDLIT_OPER_P (dname
)
8619 && innermost_code
!= cdk_function
)
8621 error ("declaration of %qD as non-function", dname
);
8622 return error_mark_node
;
8625 if (dname
&& IDENTIFIER_OPNAME_P (dname
))
8627 if (declspecs
->specs
[(int)ds_typedef
])
8629 error ("declaration of %qD as %<typedef%>", dname
);
8630 return error_mark_node
;
8632 else if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
8634 error ("declaration of %qD as parameter", dname
);
8635 return error_mark_node
;
8639 /* Anything declared one level down from the top level
8640 must be one of the parameters of a function
8641 (because the body is at least two levels down). */
8643 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8644 by not allowing C++ class definitions to specify their parameters
8645 with xdecls (must be spec.d in the parmlist).
8647 Since we now wait to push a class scope until we are sure that
8648 we are in a legitimate method context, we must set oldcname
8649 explicitly (since current_class_name is not yet alive).
8651 We also want to avoid calling this a PARM if it is in a namespace. */
8653 if (decl_context
== NORMAL
&& !toplevel_bindings_p ())
8655 cp_binding_level
*b
= current_binding_level
;
8656 current_binding_level
= b
->level_chain
;
8657 if (current_binding_level
!= 0 && toplevel_bindings_p ())
8658 decl_context
= PARM
;
8659 current_binding_level
= b
;
8663 name
= decl_context
== PARM
? "parameter" : "type name";
8665 if (constexpr_p
&& declspecs
->specs
[(int)ds_typedef
])
8667 error ("%<constexpr%> cannot appear in a typedef declaration");
8668 return error_mark_node
;
8671 /* If there were multiple types specified in the decl-specifier-seq,
8672 issue an error message. */
8673 if (declspecs
->multiple_types_p
)
8675 error ("two or more data types in declaration of %qs", name
);
8676 return error_mark_node
;
8679 if (declspecs
->conflicting_specifiers_p
)
8681 error ("conflicting specifiers in declaration of %qs", name
);
8682 return error_mark_node
;
8685 /* Extract the basic type from the decl-specifier-seq. */
8686 type
= declspecs
->type
;
8687 if (type
== error_mark_node
)
8690 type_was_error_mark_node
= true;
8692 /* If the entire declaration is itself tagged as deprecated then
8693 suppress reports of deprecated items. */
8694 if (type
&& TREE_DEPRECATED (type
)
8695 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8696 warn_deprecated_use (type
, NULL_TREE
);
8697 if (type
&& TREE_CODE (type
) == TYPE_DECL
)
8699 typedef_decl
= type
;
8700 type
= TREE_TYPE (typedef_decl
);
8701 if (TREE_DEPRECATED (type
)
8702 && DECL_ARTIFICIAL (typedef_decl
)
8703 && deprecated_state
!= DEPRECATED_SUPPRESS
)
8704 warn_deprecated_use (type
, NULL_TREE
);
8706 /* No type at all: default to `int', and set DEFAULTED_INT
8707 because it was not a user-defined typedef. */
8708 if (type
== NULL_TREE
&& (signed_p
|| unsigned_p
|| long_p
|| short_p
))
8710 /* These imply 'int'. */
8711 type
= integer_type_node
;
8715 explicit_int
= declspecs
->explicit_int_p
;
8716 explicit_char
= declspecs
->explicit_char_p
;
8719 /* See the code below that used this. */
8721 decl_attr
= DECL_ATTRIBUTES (typedef_decl
);
8723 typedef_type
= type
;
8726 if (sfk
!= sfk_conversion
)
8727 ctor_return_type
= ctype
;
8729 if (sfk
!= sfk_none
)
8730 type
= check_special_function_return_type (sfk
, type
,
8732 else if (type
== NULL_TREE
)
8738 /* We handle `main' specially here, because 'main () { }' is so
8739 common. With no options, it is allowed. With -Wreturn-type,
8740 it is a warning. It is only an error with -pedantic-errors. */
8741 is_main
= (funcdef_flag
8742 && dname
&& TREE_CODE (dname
) == IDENTIFIER_NODE
8743 && MAIN_NAME_P (dname
)
8744 && ctype
== NULL_TREE
8745 && in_namespace
== NULL_TREE
8746 && current_namespace
== global_namespace
);
8748 if (type_was_error_mark_node
)
8749 /* We've already issued an error, don't complain more. */;
8750 else if (in_system_header
|| flag_ms_extensions
)
8751 /* Allow it, sigh. */;
8753 permerror (input_location
, "ISO C++ forbids declaration of %qs with no type", name
);
8755 pedwarn (input_location
, OPT_pedantic
,
8756 "ISO C++ forbids declaration of %qs with no type", name
);
8758 warning (OPT_Wreturn_type
,
8759 "ISO C++ forbids declaration of %qs with no type", name
);
8761 type
= integer_type_node
;
8766 if (explicit_int128
)
8768 if (int128_integer_type_node
== NULL_TREE
)
8770 error ("%<__int128%> is not supported by this target");
8771 explicit_int128
= false;
8773 else if (pedantic
&& ! in_system_header
)
8774 pedwarn (input_location
, OPT_pedantic
,
8775 "ISO C++ does not support %<__int128%> for %qs", name
);
8778 /* Now process the modifiers that were specified
8779 and check for invalid combinations. */
8781 /* Long double is a special combination. */
8782 if (long_p
&& !longlong
&& TYPE_MAIN_VARIANT (type
) == double_type_node
)
8785 type
= cp_build_qualified_type (long_double_type_node
,
8786 cp_type_quals (type
));
8789 /* Check all other uses of type modifiers. */
8791 if (unsigned_p
|| signed_p
|| long_p
|| short_p
)
8795 if ((signed_p
|| unsigned_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8796 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8797 else if (signed_p
&& unsigned_p
)
8798 error ("%<signed%> and %<unsigned%> specified together for %qs", name
);
8799 else if (longlong
&& TREE_CODE (type
) != INTEGER_TYPE
)
8800 error ("%<long long%> invalid for %qs", name
);
8801 else if (long_p
&& TREE_CODE (type
) == REAL_TYPE
)
8802 error ("%<long%> invalid for %qs", name
);
8803 else if (short_p
&& TREE_CODE (type
) == REAL_TYPE
)
8804 error ("%<short%> invalid for %qs", name
);
8805 else if ((long_p
|| short_p
) && TREE_CODE (type
) != INTEGER_TYPE
)
8806 error ("%<long%> or %<short%> invalid for %qs", name
);
8807 else if ((long_p
|| short_p
|| explicit_char
|| explicit_int
) && explicit_int128
)
8808 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name
);
8809 else if ((long_p
|| short_p
) && explicit_char
)
8810 error ("%<long%> or %<short%> specified with char for %qs", name
);
8811 else if (long_p
&& short_p
)
8812 error ("%<long%> and %<short%> specified together for %qs", name
);
8813 else if (type
== char16_type_node
|| type
== char32_type_node
)
8815 if (signed_p
|| unsigned_p
)
8816 error ("%<signed%> or %<unsigned%> invalid for %qs", name
);
8817 else if (short_p
|| long_p
)
8818 error ("%<short%> or %<long%> invalid for %qs", name
);
8823 if (!explicit_int
&& !defaulted_int
&& !explicit_char
&& !explicit_int128
&& pedantic
)
8825 pedwarn (input_location
, OPT_pedantic
,
8826 "long, short, signed or unsigned used invalidly for %qs",
8828 if (flag_pedantic_errors
)
8833 /* Discard the type modifiers if they are invalid. */
8844 /* Decide whether an integer type is signed or not.
8845 Optionally treat bitfields as signed by default. */
8849 It is implementation-defined whether a plain (neither
8850 explicitly signed or unsigned) char, short, int, or long
8851 bit-field is signed or unsigned.
8853 Naturally, we extend this to long long as well. Note that
8854 this does not include wchar_t. */
8855 || (bitfield
&& !flag_signed_bitfields
8857 /* A typedef for plain `int' without `signed' can be
8858 controlled just like plain `int', but a typedef for
8859 `signed int' cannot be so controlled. */
8861 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
))
8862 && TREE_CODE (type
) == INTEGER_TYPE
8863 && !same_type_p (TYPE_MAIN_VARIANT (type
), wchar_type_node
)))
8865 if (explicit_int128
)
8866 type
= int128_unsigned_type_node
;
8868 type
= long_long_unsigned_type_node
;
8870 type
= long_unsigned_type_node
;
8872 type
= short_unsigned_type_node
;
8873 else if (type
== char_type_node
)
8874 type
= unsigned_char_type_node
;
8875 else if (typedef_decl
)
8876 type
= unsigned_type_for (type
);
8878 type
= unsigned_type_node
;
8880 else if (signed_p
&& type
== char_type_node
)
8881 type
= signed_char_type_node
;
8882 else if (explicit_int128
)
8883 type
= int128_integer_type_node
;
8885 type
= long_long_integer_type_node
;
8887 type
= long_integer_type_node
;
8889 type
= short_integer_type_node
;
8891 if (declspecs
->specs
[(int)ds_complex
])
8893 if (TREE_CODE (type
) != INTEGER_TYPE
&& TREE_CODE (type
) != REAL_TYPE
)
8894 error ("complex invalid for %qs", name
);
8895 /* If we just have "complex", it is equivalent to
8896 "complex double", but if any modifiers at all are specified it is
8897 the complex form of TYPE. E.g, "complex short" is
8898 "complex short int". */
8899 else if (defaulted_int
&& ! longlong
&& ! explicit_int128
8900 && ! (long_p
|| short_p
|| signed_p
|| unsigned_p
))
8901 type
= complex_double_type_node
;
8902 else if (type
== integer_type_node
)
8903 type
= complex_integer_type_node
;
8904 else if (type
== float_type_node
)
8905 type
= complex_float_type_node
;
8906 else if (type
== double_type_node
)
8907 type
= complex_double_type_node
;
8908 else if (type
== long_double_type_node
)
8909 type
= complex_long_double_type_node
;
8911 type
= build_complex_type (type
);
8914 type_quals
= TYPE_UNQUALIFIED
;
8915 if (declspecs
->specs
[(int)ds_const
])
8916 type_quals
|= TYPE_QUAL_CONST
;
8917 if (declspecs
->specs
[(int)ds_volatile
])
8918 type_quals
|= TYPE_QUAL_VOLATILE
;
8919 if (declspecs
->specs
[(int)ds_restrict
])
8920 type_quals
|= TYPE_QUAL_RESTRICT
;
8921 if (sfk
== sfk_conversion
&& type_quals
!= TYPE_UNQUALIFIED
)
8922 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8925 type_quals
|= cp_type_quals (type
);
8926 type
= cp_build_qualified_type_real
8927 (type
, type_quals
, ((typedef_decl
&& !DECL_ARTIFICIAL (typedef_decl
)
8928 ? tf_ignore_bad_quals
: 0) | tf_warning_or_error
));
8929 /* We might have ignored or rejected some of the qualifiers. */
8930 type_quals
= cp_type_quals (type
);
8933 inlinep
= !! declspecs
->specs
[(int)ds_inline
];
8934 virtualp
= !! declspecs
->specs
[(int)ds_virtual
];
8935 explicitp
= !! declspecs
->specs
[(int)ds_explicit
];
8937 storage_class
= declspecs
->storage_class
;
8938 if (storage_class
== sc_static
)
8939 staticp
= 1 + (decl_context
== FIELD
);
8941 if (virtualp
&& staticp
== 2)
8943 error ("member %qD cannot be declared both virtual and static", dname
);
8944 storage_class
= sc_none
;
8947 friendp
= !! declspecs
->specs
[(int)ds_friend
];
8949 if (dependent_name
&& !friendp
)
8951 error ("%<%T::%D%> is not a valid declarator", ctype
, dependent_name
);
8952 return error_mark_node
;
8955 /* Issue errors about use of storage classes for parameters. */
8956 if (decl_context
== PARM
)
8958 if (declspecs
->specs
[(int)ds_typedef
])
8960 error ("typedef declaration invalid in parameter declaration");
8961 return error_mark_node
;
8963 else if (template_parm_flag
&& storage_class
!= sc_none
)
8965 error ("storage class specified for template parameter %qs", name
);
8966 return error_mark_node
;
8968 else if (storage_class
== sc_static
8969 || storage_class
== sc_extern
8971 error ("storage class specifiers invalid in parameter declarations");
8973 /* Function parameters cannot be constexpr. If we saw one, moan
8974 and pretend it wasn't there. */
8977 error ("a parameter cannot be declared %<constexpr%>");
8982 /* Give error if `virtual' is used outside of class declaration. */
8984 && (current_class_name
== NULL_TREE
|| decl_context
!= FIELD
))
8986 error ("%<virtual%> outside class declaration");
8990 /* Static anonymous unions are dealt with here. */
8991 if (staticp
&& decl_context
== TYPENAME
8993 && ANON_AGGR_TYPE_P (declspecs
->type
))
8994 decl_context
= FIELD
;
8996 /* Warn about storage classes that are invalid for certain
8997 kinds of declarations (parameters, typenames, etc.). */
9000 && storage_class
!= sc_extern
9001 && storage_class
!= sc_static
)
9002 || declspecs
->specs
[(int)ds_typedef
]))
9004 error ("multiple storage classes in declaration of %qs", name
);
9007 if (decl_context
!= NORMAL
9008 && ((storage_class
!= sc_none
9009 && storage_class
!= sc_mutable
)
9012 if ((decl_context
== PARM
|| decl_context
== CATCHPARM
)
9013 && (storage_class
== sc_register
9014 || storage_class
== sc_auto
))
9016 else if (declspecs
->specs
[(int)ds_typedef
])
9018 else if (decl_context
== FIELD
9019 /* C++ allows static class elements. */
9020 && storage_class
== sc_static
)
9021 /* C++ also allows inlines and signed and unsigned elements,
9022 but in those cases we don't come in here. */
9026 if (decl_context
== FIELD
)
9027 error ("storage class specified for %qs", name
);
9030 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9031 error ("storage class specified for parameter %qs", name
);
9033 error ("storage class specified for typename");
9035 if (storage_class
== sc_register
9036 || storage_class
== sc_auto
9037 || storage_class
== sc_extern
9039 storage_class
= sc_none
;
9042 else if (storage_class
== sc_extern
&& funcdef_flag
9043 && ! toplevel_bindings_p ())
9044 error ("nested function %qs declared %<extern%>", name
);
9045 else if (toplevel_bindings_p ())
9047 if (storage_class
== sc_auto
)
9048 error ("top-level declaration of %qs specifies %<auto%>", name
);
9051 && storage_class
!= sc_extern
9052 && storage_class
!= sc_static
)
9054 error ("function-scope %qs implicitly auto and declared %<__thread%>",
9059 if (storage_class
&& friendp
)
9061 error ("storage class specifiers invalid in friend function declarations");
9062 storage_class
= sc_none
;
9067 unqualified_id
= NULL_TREE
;
9070 unqualified_id
= id_declarator
->u
.id
.unqualified_name
;
9071 switch (TREE_CODE (unqualified_id
))
9074 unqualified_id
= TREE_OPERAND (unqualified_id
, 0);
9075 if (TYPE_P (unqualified_id
))
9076 unqualified_id
= constructor_name (unqualified_id
);
9079 case IDENTIFIER_NODE
:
9080 case TEMPLATE_ID_EXPR
:
9088 /* Determine the type of the entity declared by recurring on the
9090 for (; declarator
; declarator
= declarator
->declarator
)
9092 const cp_declarator
*inner_declarator
;
9095 if (type
== error_mark_node
)
9096 return error_mark_node
;
9098 attrs
= declarator
->attributes
;
9104 if (declarator
== NULL
|| declarator
->kind
== cdk_id
)
9105 attr_flags
|= (int) ATTR_FLAG_DECL_NEXT
;
9106 if (declarator
->kind
== cdk_function
)
9107 attr_flags
|= (int) ATTR_FLAG_FUNCTION_NEXT
;
9108 if (declarator
->kind
== cdk_array
)
9109 attr_flags
|= (int) ATTR_FLAG_ARRAY_NEXT
;
9110 returned_attrs
= decl_attributes (&type
,
9111 chainon (returned_attrs
, attrs
),
9115 if (declarator
->kind
== cdk_id
)
9118 inner_declarator
= declarator
->declarator
;
9120 switch (declarator
->kind
)
9123 type
= create_array_type_for_decl (dname
, type
,
9124 declarator
->u
.array
.bounds
);
9132 /* Declaring a function type.
9133 Make sure we have a valid type for the function to return. */
9135 if (type_quals
!= TYPE_UNQUALIFIED
)
9137 if (SCALAR_TYPE_P (type
) || VOID_TYPE_P (type
))
9138 warning (OPT_Wignored_qualifiers
,
9139 "type qualifiers ignored on function return type");
9140 /* We now know that the TYPE_QUALS don't apply to the
9141 decl, but to its return type. */
9142 type_quals
= TYPE_UNQUALIFIED
;
9144 errmsg
= targetm
.invalid_return_type (type
);
9148 type
= integer_type_node
;
9151 /* Error about some types functions can't return. */
9153 if (TREE_CODE (type
) == FUNCTION_TYPE
)
9155 error ("%qs declared as function returning a function", name
);
9156 return error_mark_node
;
9158 if (TREE_CODE (type
) == ARRAY_TYPE
)
9160 error ("%qs declared as function returning an array", name
);
9161 return error_mark_node
;
9164 /* Pick up type qualifiers which should be applied to `this'. */
9165 memfn_quals
= declarator
->u
.function
.qualifiers
;
9166 /* Pick up virt-specifiers. */
9167 virt_specifiers
= declarator
->u
.function
.virt_specifiers
;
9168 /* Pick up the exception specifications. */
9169 raises
= declarator
->u
.function
.exception_specification
;
9170 /* If the exception-specification is ill-formed, let's pretend
9171 there wasn't one. */
9172 if (raises
== error_mark_node
)
9175 /* Say it's a definition only for the CALL_EXPR
9176 closest to the identifier. */
9177 funcdecl_p
= inner_declarator
&& inner_declarator
->kind
== cdk_id
;
9179 /* Handle a late-specified return type. */
9182 if (type_uses_auto (type
))
9184 if (!declarator
->u
.function
.late_return_type
)
9186 error ("%qs function uses %<auto%> type specifier without"
9187 " trailing return type", name
);
9188 return error_mark_node
;
9190 else if (!is_auto (type
))
9192 error ("%qs function with trailing return type has"
9193 " %qT as its type rather than plain %<auto%>",
9195 return error_mark_node
;
9198 else if (declarator
->u
.function
.late_return_type
)
9200 if (cxx_dialect
< cxx0x
)
9201 /* Not using maybe_warn_cpp0x because this should
9202 always be an error. */
9203 error ("trailing return type only available with "
9204 "-std=c++11 or -std=gnu++11");
9206 error ("%qs function with trailing return type not "
9207 "declared with %<auto%> type specifier", name
);
9208 return error_mark_node
;
9211 type
= splice_late_return_type
9212 (type
, declarator
->u
.function
.late_return_type
);
9213 if (type
== error_mark_node
)
9214 return error_mark_node
;
9216 if (ctype
== NULL_TREE
9217 && decl_context
== FIELD
9219 && (friendp
== 0 || dname
== current_class_name
))
9220 ctype
= current_class_type
;
9222 if (ctype
&& (sfk
== sfk_constructor
9223 || sfk
== sfk_destructor
))
9225 /* We are within a class's scope. If our declarator name
9226 is the same as the class name, and we are defining
9227 a function, then it is a constructor/destructor, and
9228 therefore returns a void type. */
9230 /* ISO C++ 12.4/2. A destructor may not be declared
9231 const or volatile. A destructor may not be
9234 ISO C++ 12.1. A constructor may not be declared
9235 const or volatile. A constructor may not be
9236 virtual. A constructor may not be static. */
9238 error ((flags
== DTOR_FLAG
)
9239 ? G_("destructor cannot be static member function")
9240 : G_("constructor cannot be static member function"));
9243 error ((flags
== DTOR_FLAG
)
9244 ? G_("destructors may not be cv-qualified")
9245 : G_("constructors may not be cv-qualified"));
9246 memfn_quals
= TYPE_UNQUALIFIED
;
9249 if (decl_context
== FIELD
9250 && !member_function_or_else (ctype
,
9253 return error_mark_node
;
9255 if (flags
!= DTOR_FLAG
)
9257 /* It's a constructor. */
9262 permerror (input_location
, "constructors cannot be declared virtual");
9265 if (decl_context
== FIELD
9266 && sfk
!= sfk_constructor
)
9267 return error_mark_node
;
9269 if (decl_context
== FIELD
)
9275 error ("can%'t initialize friend function %qs", name
);
9278 /* Cannot be both friend and virtual. */
9279 error ("virtual functions cannot be friends");
9282 if (decl_context
== NORMAL
)
9283 error ("friend declaration not in class definition");
9284 if (current_function_decl
&& funcdef_flag
)
9285 error ("can%'t define friend function %qs in a local "
9289 else if (ctype
&& sfk
== sfk_conversion
)
9293 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION
);
9298 arg_types
= grokparms (declarator
->u
.function
.parameters
,
9301 if (inner_declarator
9302 && inner_declarator
->kind
== cdk_id
9303 && inner_declarator
->u
.id
.sfk
== sfk_destructor
9304 && arg_types
!= void_list_node
)
9306 error ("destructors may not have parameters");
9307 arg_types
= void_list_node
;
9311 type
= build_function_type (type
, arg_types
);
9318 /* Filter out pointers-to-references and references-to-references.
9319 We can get these if a TYPE_DECL is used. */
9321 if (TREE_CODE (type
) == REFERENCE_TYPE
)
9323 if (declarator
->kind
!= cdk_reference
)
9325 error ("cannot declare pointer to %q#T", type
);
9326 type
= TREE_TYPE (type
);
9329 /* In C++0x, we allow reference to reference declarations
9330 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9331 and template type arguments [14.3.1/4 temp.arg.type]. The
9332 check for direct reference to reference declarations, which
9333 are still forbidden, occurs below. Reasoning behind the change
9334 can be found in DR106, DR540, and the rvalue reference
9336 else if (cxx_dialect
== cxx98
)
9338 error ("cannot declare reference to %q#T", type
);
9339 type
= TREE_TYPE (type
);
9342 else if (VOID_TYPE_P (type
))
9344 if (declarator
->kind
== cdk_reference
)
9345 error ("cannot declare reference to %q#T", type
);
9346 else if (declarator
->kind
== cdk_ptrmem
)
9347 error ("cannot declare pointer to %q#T member", type
);
9350 /* We now know that the TYPE_QUALS don't apply to the decl,
9351 but to the target of the pointer. */
9352 type_quals
= TYPE_UNQUALIFIED
;
9354 if (declarator
->kind
== cdk_ptrmem
9355 && (TREE_CODE (type
) == FUNCTION_TYPE
9356 || (memfn_quals
&& TREE_CODE (type
) == METHOD_TYPE
)))
9358 memfn_quals
|= type_memfn_quals (type
);
9359 type
= build_memfn_type (type
,
9360 declarator
->u
.pointer
.class_type
,
9362 if (type
== error_mark_node
)
9363 return error_mark_node
;
9364 memfn_quals
= TYPE_UNQUALIFIED
;
9367 if (TREE_CODE (type
) == FUNCTION_TYPE
9368 && type_memfn_quals (type
) != TYPE_UNQUALIFIED
)
9369 error (declarator
->kind
== cdk_reference
9370 ? G_("cannot declare reference to qualified function type %qT")
9371 : G_("cannot declare pointer to qualified function type %qT"),
9374 /* When the pointed-to type involves components of variable size,
9375 care must be taken to ensure that the size evaluation code is
9376 emitted early enough to dominate all the possible later uses
9377 and late enough for the variables on which it depends to have
9380 This is expected to happen automatically when the pointed-to
9381 type has a name/declaration of it's own, but special attention
9382 is required if the type is anonymous.
9384 We handle the NORMAL and FIELD contexts here by inserting a
9385 dummy statement that just evaluates the size at a safe point
9386 and ensures it is not deferred until e.g. within a deeper
9387 conditional context (c++/43555).
9389 We expect nothing to be needed here for PARM or TYPENAME.
9390 Evaluating the size at this point for TYPENAME would
9391 actually be incorrect, as we might be in the middle of an
9392 expression with side effects on the pointed-to type size
9393 "arguments" prior to the pointer declaration point and the
9394 size evaluation could end up prior to the side effects. */
9396 if (!TYPE_NAME (type
)
9397 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9398 && at_function_scope_p ()
9399 && variably_modified_type_p (type
, NULL_TREE
))
9401 /* First break out any side-effects. */
9402 stabilize_vla_size (TYPE_SIZE (type
));
9403 /* And then force evaluation of the SAVE_EXPR. */
9404 finish_expr_stmt (TYPE_SIZE (type
));
9407 if (declarator
->kind
== cdk_reference
)
9409 /* In C++0x, the type we are creating a reference to might be
9410 a typedef which is itself a reference type. In that case,
9411 we follow the reference collapsing rules in
9412 [7.1.3/8 dcl.typedef] to create the final reference type:
9414 "If a typedef TD names a type that is a reference to a type
9415 T, an attempt to create the type 'lvalue reference to cv TD'
9416 creates the type 'lvalue reference to T,' while an attempt
9417 to create the type "rvalue reference to cv TD' creates the
9420 if (VOID_TYPE_P (type
))
9421 /* We already gave an error. */;
9422 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9424 if (declarator
->u
.reference
.rvalue_ref
)
9425 /* Leave type alone. */;
9427 type
= cp_build_reference_type (TREE_TYPE (type
), false);
9430 type
= cp_build_reference_type
9431 (type
, declarator
->u
.reference
.rvalue_ref
);
9433 /* In C++0x, we need this check for direct reference to
9434 reference declarations, which are forbidden by
9435 [8.3.2/5 dcl.ref]. Reference to reference declarations
9436 are only allowed indirectly through typedefs and template
9437 type arguments. Example:
9439 void foo(int & &); // invalid ref-to-ref decl
9441 typedef int & int_ref;
9442 void foo(int_ref &); // valid ref-to-ref decl
9444 if (inner_declarator
&& inner_declarator
->kind
== cdk_reference
)
9445 error ("cannot declare reference to %q#T, which is not "
9446 "a typedef or a template type argument", type
);
9448 else if (TREE_CODE (type
) == METHOD_TYPE
)
9449 type
= build_ptrmemfunc_type (build_pointer_type (type
));
9450 else if (declarator
->kind
== cdk_ptrmem
)
9452 gcc_assert (TREE_CODE (declarator
->u
.pointer
.class_type
)
9454 if (declarator
->u
.pointer
.class_type
== error_mark_node
)
9455 /* We will already have complained. */
9456 type
= error_mark_node
;
9458 type
= build_ptrmem_type (declarator
->u
.pointer
.class_type
,
9462 type
= build_pointer_type (type
);
9464 /* Process a list of type modifier keywords (such as
9465 const or volatile) that were given inside the `*' or `&'. */
9467 if (declarator
->u
.pointer
.qualifiers
)
9470 = cp_build_qualified_type (type
,
9471 declarator
->u
.pointer
.qualifiers
);
9472 type_quals
= cp_type_quals (type
);
9485 /* We need to stabilize side-effects in VLA sizes for regular array
9486 declarations too, not just pointers to arrays. */
9487 if (type
!= error_mark_node
&& !TYPE_NAME (type
)
9488 && (decl_context
== NORMAL
|| decl_context
== FIELD
)
9489 && at_function_scope_p ()
9490 && variably_modified_type_p (type
, NULL_TREE
))
9491 stabilize_vla_size (TYPE_SIZE (type
));
9493 /* A `constexpr' specifier used in an object declaration declares
9494 the object as `const'. */
9495 if (constexpr_p
&& innermost_code
!= cdk_function
)
9497 if (type_quals
& TYPE_QUAL_CONST
)
9498 error ("both %<const%> and %<constexpr%> cannot be used here");
9499 if (type_quals
& TYPE_QUAL_VOLATILE
)
9500 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9501 if (TREE_CODE (type
) != REFERENCE_TYPE
)
9503 type_quals
|= TYPE_QUAL_CONST
;
9504 type
= cp_build_qualified_type (type
, type_quals
);
9508 if (unqualified_id
&& TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
9509 && TREE_CODE (type
) != FUNCTION_TYPE
9510 && TREE_CODE (type
) != METHOD_TYPE
)
9512 error ("template-id %qD used as a declarator",
9514 unqualified_id
= dname
;
9517 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9518 qualified with a class-name, turn it into a METHOD_TYPE, unless
9519 we know that the function is static. We take advantage of this
9520 opportunity to do other processing that pertains to entities
9521 explicitly declared to be class members. Note that if DECLARATOR
9522 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9523 would not have exited the loop above. */
9525 && declarator
->u
.id
.qualifying_scope
9526 && MAYBE_CLASS_TYPE_P (declarator
->u
.id
.qualifying_scope
))
9530 ctype
= declarator
->u
.id
.qualifying_scope
;
9531 ctype
= TYPE_MAIN_VARIANT (ctype
);
9533 while (t
!= NULL_TREE
&& CLASS_TYPE_P (t
))
9535 /* You're supposed to have one `template <...>' for every
9536 template class, but you don't need one for a full
9537 specialization. For example:
9539 template <class T> struct S{};
9540 template <> struct S<int> { void f(); };
9541 void S<int>::f () {}
9543 is correct; there shouldn't be a `template <>' for the
9544 definition of `S<int>::f'. */
9545 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t
)
9546 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t
)))
9547 /* T is an explicit (not partial) specialization. All
9548 containing classes must therefore also be explicitly
9551 if ((CLASSTYPE_USE_TEMPLATE (t
) || CLASSTYPE_IS_TEMPLATE (t
))
9552 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t
)))
9553 template_count
+= 1;
9555 t
= TYPE_MAIN_DECL (t
);
9556 t
= DECL_CONTEXT (t
);
9559 if (ctype
== current_class_type
)
9563 permerror (input_location
, "member functions are implicitly friends of their class");
9567 permerror (declarator
->id_loc
,
9568 "extra qualification %<%T::%> on member %qs",
9571 else if (/* If the qualifying type is already complete, then we
9572 can skip the following checks. */
9573 !COMPLETE_TYPE_P (ctype
)
9574 && (/* If the function is being defined, then
9575 qualifying type must certainly be complete. */
9577 /* A friend declaration of "T::f" is OK, even if
9578 "T" is a template parameter. But, if this
9579 function is not a friend, the qualifying type
9581 || (!friendp
&& !CLASS_TYPE_P (ctype
))
9582 /* For a declaration, the type need not be
9583 complete, if either it is dependent (since there
9584 is no meaningful definition of complete in that
9585 case) or the qualifying class is currently being
9587 || !(dependent_type_p (ctype
)
9588 || currently_open_class (ctype
)))
9589 /* Check that the qualifying type is complete. */
9590 && !complete_type_or_else (ctype
, NULL_TREE
))
9591 return error_mark_node
;
9592 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
9594 if (current_class_type
9595 && (!friendp
|| funcdef_flag
))
9598 ? G_("cannot define member function %<%T::%s%> "
9600 : G_("cannot declare member function %<%T::%s%> "
9602 ctype
, name
, current_class_type
);
9603 return error_mark_node
;
9606 else if (declspecs
->specs
[(int)ds_typedef
]
9607 && current_class_type
)
9609 error ("cannot declare member %<%T::%s%> within %qT",
9610 ctype
, name
, current_class_type
);
9611 return error_mark_node
;
9615 if (ctype
== NULL_TREE
&& decl_context
== FIELD
&& friendp
== 0)
9616 ctype
= current_class_type
;
9618 /* Now TYPE has the actual type. */
9623 *attrlist
= chainon (returned_attrs
, *attrlist
);
9625 attrlist
= &returned_attrs
;
9628 /* Handle parameter packs. */
9629 if (parameter_pack_p
)
9631 if (decl_context
== PARM
)
9632 /* Turn the type into a pack expansion.*/
9633 type
= make_pack_expansion (type
);
9635 error ("non-parameter %qs cannot be a parameter pack", name
);
9638 /* Did array size calculations overflow? */
9640 if (TREE_CODE (type
) == ARRAY_TYPE
9641 && COMPLETE_TYPE_P (type
)
9642 && TREE_CODE (TYPE_SIZE_UNIT (type
)) == INTEGER_CST
9643 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type
)))
9645 error ("size of array %qs is too large", name
);
9646 /* If we proceed with the array type as it is, we'll eventually
9647 crash in tree_low_cst(). */
9648 type
= error_mark_node
;
9651 if ((decl_context
== FIELD
|| decl_context
== PARM
)
9652 && !processing_template_decl
9653 && variably_modified_type_p (type
, NULL_TREE
))
9655 if (decl_context
== FIELD
)
9656 error ("data member may not have variably modified type %qT", type
);
9658 error ("parameter may not have variably modified type %qT", type
);
9659 type
= error_mark_node
;
9662 if (explicitp
== 1 || (explicitp
&& friendp
))
9664 /* [dcl.fct.spec] The explicit specifier shall only be used in
9665 declarations of constructors within a class definition. */
9666 error ("only declarations of constructors can be %<explicit%>");
9670 if (storage_class
== sc_mutable
)
9672 if (decl_context
!= FIELD
|| friendp
)
9674 error ("non-member %qs cannot be declared %<mutable%>", name
);
9675 storage_class
= sc_none
;
9677 else if (decl_context
== TYPENAME
|| declspecs
->specs
[(int)ds_typedef
])
9679 error ("non-object member %qs cannot be declared %<mutable%>", name
);
9680 storage_class
= sc_none
;
9682 else if (TREE_CODE (type
) == FUNCTION_TYPE
9683 || TREE_CODE (type
) == METHOD_TYPE
)
9685 error ("function %qs cannot be declared %<mutable%>", name
);
9686 storage_class
= sc_none
;
9690 error ("static %qs cannot be declared %<mutable%>", name
);
9691 storage_class
= sc_none
;
9693 else if (type_quals
& TYPE_QUAL_CONST
)
9695 error ("const %qs cannot be declared %<mutable%>", name
);
9696 storage_class
= sc_none
;
9698 else if (TREE_CODE (type
) == REFERENCE_TYPE
)
9700 permerror (input_location
, "reference %qs cannot be declared "
9701 "%<mutable%>", name
);
9702 storage_class
= sc_none
;
9706 /* If this is declaring a typedef name, return a TYPE_DECL. */
9707 if (declspecs
->specs
[(int)ds_typedef
] && decl_context
!= TYPENAME
)
9711 /* Note that the grammar rejects storage classes
9712 in typenames, fields or parameters. */
9713 if (current_lang_name
== lang_name_java
)
9714 TYPE_FOR_JAVA (type
) = 1;
9716 /* This declaration:
9718 typedef void f(int) const;
9720 declares a function type which is not a member of any
9721 particular class, but which is cv-qualified; for
9722 example "f S::*" declares a pointer to a const-qualified
9723 member function of S. We record the cv-qualification in the
9725 if (memfn_quals
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9727 type
= apply_memfn_quals (type
, memfn_quals
);
9729 /* We have now dealt with these qualifiers. */
9730 memfn_quals
= TYPE_UNQUALIFIED
;
9733 if (type_uses_auto (type
))
9735 error ("typedef declared %<auto%>");
9736 type
= error_mark_node
;
9739 if (decl_context
== FIELD
)
9740 decl
= build_lang_decl (TYPE_DECL
, unqualified_id
, type
);
9742 decl
= build_decl (input_location
, TYPE_DECL
, unqualified_id
, type
);
9743 if (id_declarator
&& declarator
->u
.id
.qualifying_scope
) {
9744 error_at (DECL_SOURCE_LOCATION (decl
),
9745 "typedef name may not be a nested-name-specifier");
9746 TREE_TYPE (decl
) = error_mark_node
;
9749 if (decl_context
!= FIELD
)
9751 if (!current_function_decl
)
9752 DECL_CONTEXT (decl
) = FROB_CONTEXT (current_namespace
);
9753 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl
)
9754 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9755 (current_function_decl
)))
9756 /* The TYPE_DECL is "abstract" because there will be
9757 clones of this constructor/destructor, and there will
9758 be copies of this TYPE_DECL generated in those
9760 DECL_ABSTRACT (decl
) = 1;
9762 else if (constructor_name_p (unqualified_id
, current_class_type
))
9763 permerror (input_location
, "ISO C++ forbids nested type %qD with same name "
9764 "as enclosing class",
9767 /* If the user declares "typedef struct {...} foo" then the
9768 struct will have an anonymous name. Fill that name in now.
9769 Nothing can refer to it, so nothing needs know about the name
9771 if (type
!= error_mark_node
9774 && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
9775 && TYPE_ANONYMOUS_P (type
)
9776 && declspecs
->type_definition_p
9777 && cp_type_quals (type
) == TYPE_UNQUALIFIED
)
9781 /* Replace the anonymous name with the real name everywhere. */
9782 for (t
= TYPE_MAIN_VARIANT (type
); t
; t
= TYPE_NEXT_VARIANT (t
))
9784 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t
)))
9785 /* We do not rename the debug info representing the
9786 anonymous tagged type because the standard says in
9787 [dcl.typedef] that the naming applies only for
9788 linkage purposes. */
9789 /*debug_hooks->set_name (t, decl);*/
9790 TYPE_NAME (t
) = decl
;
9793 if (TYPE_LANG_SPECIFIC (type
))
9794 TYPE_WAS_ANONYMOUS (type
) = 1;
9796 /* If this is a typedef within a template class, the nested
9797 type is a (non-primary) template. The name for the
9798 template needs updating as well. */
9799 if (TYPE_LANG_SPECIFIC (type
) && CLASSTYPE_TEMPLATE_INFO (type
))
9800 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
))
9801 = TYPE_IDENTIFIER (type
);
9803 /* Adjust linkage now that we aren't anonymous anymore. */
9804 set_linkage_according_to_type (type
, TYPE_MAIN_DECL (type
));
9805 determine_visibility (TYPE_MAIN_DECL (type
));
9807 /* FIXME remangle member functions; member functions of a
9808 type with external linkage have external linkage. */
9812 || (typedef_decl
&& C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl
)))
9813 C_TYPEDEF_EXPLICITLY_SIGNED (decl
) = 1;
9815 bad_specifiers (decl
, BSP_TYPE
, virtualp
,
9816 memfn_quals
!= TYPE_UNQUALIFIED
,
9817 inlinep
, friendp
, raises
!= NULL_TREE
);
9819 if (declspecs
->specs
[(int)ds_alias
])
9820 /* Acknowledge that this was written:
9821 `using analias = atype;'. */
9822 TYPE_DECL_ALIAS_P (decl
) = 1;
9827 /* Detect the case of an array type of unspecified size
9828 which came, as such, direct from a typedef name.
9829 We must copy the type, so that the array's domain can be
9830 individually set by the object's initializer. */
9832 if (type
&& typedef_type
9833 && TREE_CODE (type
) == ARRAY_TYPE
&& !TYPE_DOMAIN (type
)
9834 && TYPE_MAIN_VARIANT (type
) == TYPE_MAIN_VARIANT (typedef_type
))
9835 type
= build_cplus_array_type (TREE_TYPE (type
), NULL_TREE
);
9837 /* Detect where we're using a typedef of function type to declare a
9838 function. PARMS will not be set, so we must create it now. */
9840 if (type
== typedef_type
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9842 tree decls
= NULL_TREE
;
9845 for (args
= TYPE_ARG_TYPES (type
);
9846 args
&& args
!= void_list_node
;
9847 args
= TREE_CHAIN (args
))
9849 tree decl
= cp_build_parm_decl (NULL_TREE
, TREE_VALUE (args
));
9851 DECL_CHAIN (decl
) = decls
;
9855 parms
= nreverse (decls
);
9857 if (decl_context
!= TYPENAME
)
9859 /* A cv-qualifier-seq shall only be part of the function type
9860 for a non-static member function. [8.3.5/4 dcl.fct] */
9861 if (type_memfn_quals (type
) != TYPE_UNQUALIFIED
9862 && (current_class_type
== NULL_TREE
|| staticp
) )
9865 ? G_("qualified function types cannot be used to "
9866 "declare static member functions")
9867 : G_("qualified function types cannot be used to "
9868 "declare free functions"));
9869 type
= TYPE_MAIN_VARIANT (type
);
9872 /* The qualifiers on the function type become the qualifiers on
9873 the non-static member function. */
9874 memfn_quals
|= type_memfn_quals (type
);
9875 type_quals
= TYPE_UNQUALIFIED
;
9879 /* If this is a type name (such as, in a cast or sizeof),
9880 compute the type and return it now. */
9882 if (decl_context
== TYPENAME
)
9884 /* Note that the grammar rejects storage classes
9885 in typenames, fields or parameters. */
9886 if (type_quals
!= TYPE_UNQUALIFIED
)
9887 type_quals
= TYPE_UNQUALIFIED
;
9889 /* Special case: "friend class foo" looks like a TYPENAME context. */
9892 if (type_quals
!= TYPE_UNQUALIFIED
)
9894 error ("type qualifiers specified for friend class declaration");
9895 type_quals
= TYPE_UNQUALIFIED
;
9899 error ("%<inline%> specified for friend class declaration");
9905 /* Don't allow friend declaration without a class-key. */
9906 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
9907 permerror (input_location
, "template parameters cannot be friends");
9908 else if (TREE_CODE (type
) == TYPENAME_TYPE
)
9909 permerror (input_location
, "friend declaration requires class-key, "
9910 "i.e. %<friend class %T::%D%>",
9911 TYPE_CONTEXT (type
), TYPENAME_TYPE_FULLNAME (type
));
9913 permerror (input_location
, "friend declaration requires class-key, "
9914 "i.e. %<friend %#T%>",
9918 /* Only try to do this stuff if we didn't already give up. */
9919 if (type
!= integer_type_node
)
9921 /* A friendly class? */
9922 if (current_class_type
)
9923 make_friend_class (current_class_type
, TYPE_MAIN_VARIANT (type
),
9926 error ("trying to make class %qT a friend of global scope",
9929 type
= void_type_node
;
9932 else if (memfn_quals
)
9934 if (ctype
== NULL_TREE
9935 && TREE_CODE (type
) == METHOD_TYPE
)
9936 ctype
= TYPE_METHOD_BASETYPE (type
);
9939 type
= build_memfn_type (type
, ctype
, memfn_quals
);
9940 /* Core issue #547: need to allow this in template type args. */
9941 else if (template_type_arg
&& TREE_CODE (type
) == FUNCTION_TYPE
)
9942 type
= apply_memfn_quals (type
, memfn_quals
);
9944 error ("invalid qualifiers on non-member function type");
9949 else if (unqualified_id
== NULL_TREE
&& decl_context
!= PARM
9950 && decl_context
!= CATCHPARM
9951 && TREE_CODE (type
) != UNION_TYPE
9954 error ("abstract declarator %qT used as declaration", type
);
9955 return error_mark_node
;
9958 /* Only functions may be declared using an operator-function-id. */
9960 && IDENTIFIER_OPNAME_P (unqualified_id
)
9961 && TREE_CODE (type
) != FUNCTION_TYPE
9962 && TREE_CODE (type
) != METHOD_TYPE
)
9964 error ("declaration of %qD as non-function", unqualified_id
);
9965 return error_mark_node
;
9968 /* We don't check parameter types here because we can emit a better
9969 error message later. */
9970 if (decl_context
!= PARM
)
9972 type
= check_var_type (unqualified_id
, type
);
9973 if (type
== error_mark_node
)
9974 return error_mark_node
;
9977 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9978 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9980 if (decl_context
== PARM
|| decl_context
== CATCHPARM
)
9982 if (ctype
|| in_namespace
)
9983 error ("cannot use %<::%> in parameter declaration");
9985 if (type_uses_auto (type
))
9987 error ("parameter declared %<auto%>");
9988 type
= error_mark_node
;
9991 /* A parameter declared as an array of T is really a pointer to T.
9992 One declared as a function is really a pointer to a function.
9993 One declared as a member is really a pointer to member. */
9995 if (TREE_CODE (type
) == ARRAY_TYPE
)
9997 /* Transfer const-ness of array into that of type pointed to. */
9998 type
= build_pointer_type (TREE_TYPE (type
));
9999 type_quals
= TYPE_UNQUALIFIED
;
10001 else if (TREE_CODE (type
) == FUNCTION_TYPE
)
10002 type
= build_pointer_type (type
);
10005 if (ctype
&& TREE_CODE (type
) == FUNCTION_TYPE
&& staticp
< 2
10006 && !NEW_DELETE_OPNAME_P (unqualified_id
))
10008 cp_cv_quals real_quals
= memfn_quals
;
10009 if (constexpr_p
&& sfk
!= sfk_constructor
&& sfk
!= sfk_destructor
)
10010 real_quals
|= TYPE_QUAL_CONST
;
10011 type
= build_memfn_type (type
, ctype
, real_quals
);
10017 if (decl_context
== PARM
)
10019 decl
= cp_build_parm_decl (unqualified_id
, type
);
10021 bad_specifiers (decl
, BSP_PARM
, virtualp
,
10022 memfn_quals
!= TYPE_UNQUALIFIED
,
10023 inlinep
, friendp
, raises
!= NULL_TREE
);
10025 else if (decl_context
== FIELD
)
10027 if (!staticp
&& type_uses_auto (type
))
10029 error ("non-static data member declared %<auto%>");
10030 type
= error_mark_node
;
10033 /* The C99 flexible array extension. */
10034 if (!staticp
&& TREE_CODE (type
) == ARRAY_TYPE
10035 && TYPE_DOMAIN (type
) == NULL_TREE
)
10037 tree itype
= compute_array_index_type (dname
, integer_zero_node
,
10038 tf_warning_or_error
);
10039 type
= build_cplus_array_type (TREE_TYPE (type
), itype
);
10042 if (type
== error_mark_node
)
10044 /* Happens when declaring arrays of sizes which
10045 are error_mark_node, for example. */
10048 else if (in_namespace
&& !friendp
)
10050 /* Something like struct S { int N::j; }; */
10051 error ("invalid use of %<::%>");
10052 return error_mark_node
;
10054 else if (TREE_CODE (type
) == FUNCTION_TYPE
10055 || TREE_CODE (type
) == METHOD_TYPE
)
10058 tree function_context
;
10062 /* This should never happen in pure C++ (the check
10063 could be an assert). It could happen in
10064 Objective-C++ if someone writes invalid code that
10065 uses a function declaration for an instance
10066 variable or property (instance variables and
10067 properties are parsed as FIELD_DECLs, but they are
10068 part of an Objective-C class, not a C++ class).
10069 That code is invalid and is caught by this
10073 error ("declaration of function %qD in invalid context",
10075 return error_mark_node
;
10078 /* ``A union may [ ... ] not [ have ] virtual functions.''
10080 if (virtualp
&& TREE_CODE (ctype
) == UNION_TYPE
)
10082 error ("function %qD declared virtual inside a union",
10084 return error_mark_node
;
10087 if (NEW_DELETE_OPNAME_P (unqualified_id
))
10091 error ("%qD cannot be declared virtual, since it "
10092 "is always static",
10099 /* Check that the name used for a destructor makes sense. */
10100 if (sfk
== sfk_destructor
)
10102 tree uqname
= id_declarator
->u
.id
.unqualified_name
;
10106 gcc_assert (friendp
);
10107 error ("expected qualified name in friend declaration "
10108 "for destructor %qD", uqname
);
10109 return error_mark_node
;
10112 if (!check_dtor_name (ctype
, TREE_OPERAND (uqname
, 0)))
10114 error ("declaration of %qD as member of %qT",
10116 return error_mark_node
;
10120 error ("a destructor cannot be %<constexpr%>");
10121 return error_mark_node
;
10124 else if (sfk
== sfk_constructor
&& friendp
&& !ctype
)
10126 error ("expected qualified name in friend declaration "
10127 "for constructor %qD",
10128 id_declarator
->u
.id
.unqualified_name
);
10129 return error_mark_node
;
10132 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
10133 function_context
= (ctype
!= NULL_TREE
) ?
10134 decl_function_context (TYPE_MAIN_DECL (ctype
)) : NULL_TREE
;
10135 publicp
= (! friendp
|| ! staticp
)
10136 && function_context
== NULL_TREE
;
10137 decl
= grokfndecl (ctype
, type
,
10138 TREE_CODE (unqualified_id
) != TEMPLATE_ID_EXPR
10139 ? unqualified_id
: dname
,
10142 virtualp
, flags
, memfn_quals
, raises
,
10143 friendp
? -1 : 0, friendp
, publicp
,
10144 inlinep
| (2 * constexpr_p
),
10146 funcdef_flag
, template_count
, in_namespace
,
10147 attrlist
, declarator
->id_loc
);
10148 decl
= set_virt_specifiers (decl
, virt_specifiers
);
10149 if (decl
== NULL_TREE
)
10150 return error_mark_node
;
10152 /* This clobbers the attrs stored in `decl' from `attrlist'. */
10153 /* The decl and setting of decl_attr is also turned off. */
10154 decl
= build_decl_attribute_variant (decl
, decl_attr
);
10157 /* [class.conv.ctor]
10159 A constructor declared without the function-specifier
10160 explicit that can be called with a single parameter
10161 specifies a conversion from the type of its first
10162 parameter to the type of its class. Such a constructor
10163 is called a converting constructor. */
10164 if (explicitp
== 2)
10165 DECL_NONCONVERTING_P (decl
) = 1;
10167 else if (!staticp
&& !dependent_type_p (type
)
10168 && !COMPLETE_TYPE_P (complete_type (type
))
10169 && (TREE_CODE (type
) != ARRAY_TYPE
|| initialized
== 0))
10171 if (unqualified_id
)
10172 error ("field %qD has incomplete type", unqualified_id
);
10174 error ("name %qT has incomplete type", type
);
10176 /* If we're instantiating a template, tell them which
10177 instantiation made the field's type be incomplete. */
10178 if (current_class_type
10179 && TYPE_NAME (current_class_type
)
10180 && IDENTIFIER_TEMPLATE (current_class_name
)
10182 && declspecs
->type
== type
)
10183 error (" in instantiation of template %qT",
10184 current_class_type
);
10186 return error_mark_node
;
10192 error ("%qE is neither function nor member function; "
10193 "cannot be declared friend", unqualified_id
);
10201 /* Friends are treated specially. */
10202 if (ctype
== current_class_type
)
10203 ; /* We already issued a permerror. */
10204 else if (decl
&& DECL_NAME (decl
))
10206 if (template_class_depth (current_class_type
) == 0)
10208 decl
= check_explicit_specialization
10209 (unqualified_id
, decl
, template_count
,
10210 2 * funcdef_flag
+ 4);
10211 if (decl
== error_mark_node
)
10212 return error_mark_node
;
10215 decl
= do_friend (ctype
, unqualified_id
, decl
,
10221 return error_mark_node
;
10224 /* Structure field. It may not be a function, except for C++. */
10226 if (decl
== NULL_TREE
)
10230 /* C++ allows static class members. All other work
10231 for this is done by grokfield. */
10232 decl
= build_lang_decl (VAR_DECL
, unqualified_id
, type
);
10233 set_linkage_for_static_data_member (decl
);
10234 /* Even if there is an in-class initialization, DECL
10235 is considered undefined until an out-of-class
10236 definition is provided. */
10237 DECL_EXTERNAL (decl
) = 1;
10240 DECL_TLS_MODEL (decl
) = decl_default_tls_model (decl
);
10242 if (constexpr_p
&& !initialized
)
10244 error ("constexpr static data member %qD must have an "
10245 "initializer", decl
);
10246 constexpr_p
= false;
10253 error ("non-static data member %qE declared %<constexpr%>",
10255 constexpr_p
= false;
10257 decl
= build_decl (input_location
,
10258 FIELD_DECL
, unqualified_id
, type
);
10259 DECL_NONADDRESSABLE_P (decl
) = bitfield
;
10260 if (bitfield
&& !unqualified_id
)
10261 TREE_NO_WARNING (decl
) = 1;
10263 if (storage_class
== sc_mutable
)
10265 DECL_MUTABLE_P (decl
) = 1;
10266 storage_class
= sc_none
;
10271 /* An attempt is being made to initialize a non-static
10272 member. This is new in C++11. */
10273 maybe_warn_cpp0x (CPP0X_NSDMI
);
10275 /* If this has been parsed with static storage class, but
10276 errors forced staticp to be cleared, ensure NSDMI is
10278 if (declspecs
->storage_class
== sc_static
)
10279 DECL_INITIAL (decl
) = error_mark_node
;
10283 bad_specifiers (decl
, BSP_FIELD
, virtualp
,
10284 memfn_quals
!= TYPE_UNQUALIFIED
,
10285 inlinep
, friendp
, raises
!= NULL_TREE
);
10288 else if (TREE_CODE (type
) == FUNCTION_TYPE
10289 || TREE_CODE (type
) == METHOD_TYPE
)
10291 tree original_name
;
10294 if (!unqualified_id
)
10295 return error_mark_node
;
10297 if (TREE_CODE (unqualified_id
) == TEMPLATE_ID_EXPR
)
10298 original_name
= dname
;
10300 original_name
= unqualified_id
;
10302 if (storage_class
== sc_auto
)
10303 error ("storage class %<auto%> invalid for function %qs", name
);
10304 else if (storage_class
== sc_register
)
10305 error ("storage class %<register%> invalid for function %qs", name
);
10307 error ("storage class %<__thread%> invalid for function %qs", name
);
10309 if (virt_specifiers
)
10310 error ("virt-specifiers in %qs not allowed outside a class definition", name
);
10311 /* Function declaration not at top level.
10312 Storage classes other than `extern' are not allowed
10313 and `extern' makes no difference. */
10314 if (! toplevel_bindings_p ()
10315 && (storage_class
== sc_static
10316 || declspecs
->specs
[(int)ds_inline
])
10319 if (storage_class
== sc_static
)
10320 pedwarn (input_location
, OPT_pedantic
,
10321 "%<static%> specified invalid for function %qs "
10322 "declared out of global scope", name
);
10324 pedwarn (input_location
, OPT_pedantic
,
10325 "%<inline%> specifier invalid for function %qs "
10326 "declared out of global scope", name
);
10329 if (ctype
== NULL_TREE
)
10333 error ("virtual non-class function %qs", name
);
10336 else if (sfk
== sfk_constructor
10337 || sfk
== sfk_destructor
)
10339 error (funcdef_flag
10340 ? G_("%qs defined in a non-class scope")
10341 : G_("%qs declared in a non-class scope"), name
);
10346 /* Record presence of `static'. */
10347 publicp
= (ctype
!= NULL_TREE
10348 || storage_class
== sc_extern
10349 || storage_class
!= sc_static
);
10351 decl
= grokfndecl (ctype
, type
, original_name
, parms
, unqualified_id
,
10352 virtualp
, flags
, memfn_quals
, raises
,
10354 publicp
, inlinep
| (2 * constexpr_p
), sfk
,
10356 template_count
, in_namespace
, attrlist
,
10357 declarator
->id_loc
);
10358 if (decl
== NULL_TREE
)
10359 return error_mark_node
;
10363 int invalid_static
= 0;
10365 /* Don't allow a static member function in a class, and forbid
10366 declaring main to be static. */
10367 if (TREE_CODE (type
) == METHOD_TYPE
)
10369 permerror (input_location
, "cannot declare member function %qD to have "
10370 "static linkage", decl
);
10371 invalid_static
= 1;
10373 else if (current_function_decl
)
10375 /* FIXME need arm citation */
10376 error ("cannot declare static function inside another function");
10377 invalid_static
= 1;
10380 if (invalid_static
)
10383 storage_class
= sc_none
;
10389 /* It's a variable. */
10391 /* An uninitialized decl with `extern' is a reference. */
10392 decl
= grokvardecl (type
, unqualified_id
,
10395 (type_quals
& TYPE_QUAL_CONST
) != 0,
10396 ctype
? ctype
: in_namespace
);
10397 bad_specifiers (decl
, BSP_VAR
, virtualp
,
10398 memfn_quals
!= TYPE_UNQUALIFIED
,
10399 inlinep
, friendp
, raises
!= NULL_TREE
);
10403 DECL_CONTEXT (decl
) = ctype
;
10406 permerror (input_location
, "%<static%> may not be used when defining "
10407 "(as opposed to declaring) a static data member");
10409 storage_class
= sc_none
;
10411 if (storage_class
== sc_register
&& TREE_STATIC (decl
))
10413 error ("static member %qD declared %<register%>", decl
);
10414 storage_class
= sc_none
;
10416 if (storage_class
== sc_extern
&& pedantic
)
10418 pedwarn (input_location
, OPT_pedantic
,
10419 "cannot explicitly declare member %q#D to have "
10420 "extern linkage", decl
);
10421 storage_class
= sc_none
;
10424 else if (constexpr_p
&& DECL_EXTERNAL (decl
))
10426 error ("declaration of constexpr variable %qD is not a definition",
10428 constexpr_p
= false;
10432 if (storage_class
== sc_extern
&& initialized
&& !funcdef_flag
)
10434 if (toplevel_bindings_p ())
10436 /* It's common practice (and completely valid) to have a const
10437 be initialized and declared extern. */
10438 if (!(type_quals
& TYPE_QUAL_CONST
))
10439 warning (0, "%qs initialized and declared %<extern%>", name
);
10443 error ("%qs has both %<extern%> and initializer", name
);
10444 return error_mark_node
;
10448 /* Record `register' declaration for warnings on &
10449 and in case doing stupid register allocation. */
10451 if (storage_class
== sc_register
)
10452 DECL_REGISTER (decl
) = 1;
10453 else if (storage_class
== sc_extern
)
10454 DECL_THIS_EXTERN (decl
) = 1;
10455 else if (storage_class
== sc_static
)
10456 DECL_THIS_STATIC (decl
) = 1;
10458 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10459 if (constexpr_p
&& TREE_CODE (decl
) == VAR_DECL
)
10460 DECL_DECLARED_CONSTEXPR_P (decl
) = true;
10462 /* Record constancy and volatility on the DECL itself . There's
10463 no need to do this when processing a template; we'll do this
10464 for the instantiated declaration based on the type of DECL. */
10465 if (!processing_template_decl
)
10466 cp_apply_type_quals_to_decl (type_quals
, decl
);
10472 /* Subroutine of start_function. Ensure that each of the parameter
10473 types (as listed in PARMS) is complete, as is required for a
10474 function definition. */
10477 require_complete_types_for_parms (tree parms
)
10479 for (; parms
; parms
= DECL_CHAIN (parms
))
10481 if (dependent_type_p (TREE_TYPE (parms
)))
10483 if (!VOID_TYPE_P (TREE_TYPE (parms
))
10484 && complete_type_or_else (TREE_TYPE (parms
), parms
))
10486 relayout_decl (parms
);
10487 DECL_ARG_TYPE (parms
) = type_passed_as (TREE_TYPE (parms
));
10490 /* grokparms or complete_type_or_else will have already issued
10492 TREE_TYPE (parms
) = error_mark_node
;
10496 /* Returns nonzero if T is a local variable. */
10499 local_variable_p (const_tree t
)
10501 if ((TREE_CODE (t
) == VAR_DECL
10502 /* A VAR_DECL with a context that is a _TYPE is a static data
10504 && !TYPE_P (CP_DECL_CONTEXT (t
))
10505 /* Any other non-local variable must be at namespace scope. */
10506 && !DECL_NAMESPACE_SCOPE_P (t
))
10507 || (TREE_CODE (t
) == PARM_DECL
))
10513 /* Like local_variable_p, but suitable for use as a tree-walking
10517 local_variable_p_walkfn (tree
*tp
, int *walk_subtrees
,
10518 void *data ATTRIBUTE_UNUSED
)
10520 /* Check DECL_NAME to avoid including temporaries. We don't check
10521 DECL_ARTIFICIAL because we do want to complain about 'this'. */
10522 if (local_variable_p (*tp
) && DECL_NAME (*tp
))
10524 else if (TYPE_P (*tp
))
10525 *walk_subtrees
= 0;
10530 /* Check that ARG, which is a default-argument expression for a
10531 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10532 something goes wrong. DECL may also be a _TYPE node, rather than a
10533 DECL, if there is no DECL available. */
10536 check_default_argument (tree decl
, tree arg
)
10541 if (TREE_CODE (arg
) == DEFAULT_ARG
)
10542 /* We get a DEFAULT_ARG when looking at an in-class declaration
10543 with a default argument. Ignore the argument for now; we'll
10544 deal with it after the class is complete. */
10553 decl_type
= TREE_TYPE (decl
);
10555 if (arg
== error_mark_node
10556 || decl
== error_mark_node
10557 || TREE_TYPE (arg
) == error_mark_node
10558 || decl_type
== error_mark_node
)
10559 /* Something already went wrong. There's no need to check
10561 return error_mark_node
;
10563 /* [dcl.fct.default]
10565 A default argument expression is implicitly converted to the
10567 if (!TREE_TYPE (arg
)
10568 || !can_convert_arg (decl_type
, TREE_TYPE (arg
), arg
, LOOKUP_NORMAL
))
10571 error ("default argument for %q#D has type %qT",
10572 decl
, TREE_TYPE (arg
));
10574 error ("default argument for parameter of type %qT has type %qT",
10575 decl_type
, TREE_TYPE (arg
));
10577 return error_mark_node
;
10580 /* [dcl.fct.default]
10582 Local variables shall not be used in default argument
10585 The keyword `this' shall not be used in a default argument of a
10586 member function. */
10587 var
= cp_walk_tree_without_duplicates (&arg
, local_variable_p_walkfn
, NULL
);
10590 if (DECL_NAME (var
) == this_identifier
)
10591 permerror (input_location
, "default argument %qE uses %qD", arg
, var
);
10593 error ("default argument %qE uses local variable %qD", arg
, var
);
10594 return error_mark_node
;
10601 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10604 type_is_deprecated (tree type
)
10606 enum tree_code code
;
10607 if (TREE_DEPRECATED (type
))
10609 if (TYPE_NAME (type
)
10610 && TREE_DEPRECATED (TYPE_NAME (type
)))
10613 /* Do warn about using typedefs to a deprecated class. */
10614 if (TAGGED_TYPE_P (type
) && type
!= TYPE_MAIN_VARIANT (type
))
10615 return type_is_deprecated (TYPE_MAIN_VARIANT (type
));
10617 code
= TREE_CODE (type
);
10619 if (code
== POINTER_TYPE
|| code
== REFERENCE_TYPE
10620 || code
== OFFSET_TYPE
|| code
== FUNCTION_TYPE
10621 || code
== METHOD_TYPE
|| code
== ARRAY_TYPE
)
10622 return type_is_deprecated (TREE_TYPE (type
));
10624 if (TYPE_PTRMEMFUNC_P (type
))
10625 return type_is_deprecated
10626 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type
))));
10631 /* Decode the list of parameter types for a function type.
10632 Given the list of things declared inside the parens,
10633 return a list of types.
10635 If this parameter does not end with an ellipsis, we append
10638 *PARMS is set to the chain of PARM_DECLs created. */
10641 grokparms (tree parmlist
, tree
*parms
)
10643 tree result
= NULL_TREE
;
10644 tree decls
= NULL_TREE
;
10648 for (parm
= parmlist
; parm
!= NULL_TREE
; parm
= TREE_CHAIN (parm
))
10650 tree type
= NULL_TREE
;
10651 tree init
= TREE_PURPOSE (parm
);
10652 tree decl
= TREE_VALUE (parm
);
10653 const char *errmsg
;
10655 if (parm
== void_list_node
)
10658 if (! decl
|| TREE_TYPE (decl
) == error_mark_node
)
10661 type
= TREE_TYPE (decl
);
10662 if (VOID_TYPE_P (type
))
10664 if (same_type_p (type
, void_type_node
)
10665 && DECL_SELF_REFERENCE_P (type
)
10666 && !DECL_NAME (decl
) && !result
&& TREE_CHAIN (parm
) == void_list_node
)
10667 /* this is a parmlist of `(void)', which is ok. */
10669 cxx_incomplete_type_error (decl
, type
);
10670 /* It's not a good idea to actually create parameters of
10671 type `void'; other parts of the compiler assume that a
10672 void type terminates the parameter list. */
10673 type
= error_mark_node
;
10674 TREE_TYPE (decl
) = error_mark_node
;
10677 if (type
!= error_mark_node
10678 && TYPE_FOR_JAVA (type
)
10679 && MAYBE_CLASS_TYPE_P (type
))
10681 error ("parameter %qD has Java class type", decl
);
10682 type
= error_mark_node
;
10683 TREE_TYPE (decl
) = error_mark_node
;
10687 if (type
!= error_mark_node
10688 && (errmsg
= targetm
.invalid_parameter_type (type
)))
10691 type
= error_mark_node
;
10692 TREE_TYPE (decl
) = error_mark_node
;
10695 if (type
!= error_mark_node
)
10697 if (deprecated_state
!= DEPRECATED_SUPPRESS
)
10699 tree deptype
= type_is_deprecated (type
);
10701 warn_deprecated_use (deptype
, NULL_TREE
);
10704 /* Top-level qualifiers on the parameters are
10705 ignored for function types. */
10706 type
= cp_build_qualified_type (type
, 0);
10707 if (TREE_CODE (type
) == METHOD_TYPE
)
10709 error ("parameter %qD invalidly declared method type", decl
);
10710 type
= build_pointer_type (type
);
10711 TREE_TYPE (decl
) = type
;
10713 else if (abstract_virtuals_error (decl
, type
))
10714 any_error
= 1; /* Seems like a good idea. */
10715 else if (POINTER_TYPE_P (type
))
10717 /* [dcl.fct]/6, parameter types cannot contain pointers
10718 (references) to arrays of unknown bound. */
10719 tree t
= TREE_TYPE (type
);
10720 int ptr
= TYPE_PTR_P (type
);
10724 if (TYPE_PTR_P (t
))
10726 else if (TREE_CODE (t
) != ARRAY_TYPE
)
10728 else if (!TYPE_DOMAIN (t
))
10732 if (TREE_CODE (t
) == ARRAY_TYPE
)
10734 ? G_("parameter %qD includes pointer to array of "
10735 "unknown bound %qT")
10736 : G_("parameter %qD includes reference to array of "
10737 "unknown bound %qT"),
10743 else if (init
&& !processing_template_decl
)
10744 init
= check_default_argument (decl
, init
);
10747 DECL_CHAIN (decl
) = decls
;
10749 result
= tree_cons (init
, type
, result
);
10751 decls
= nreverse (decls
);
10752 result
= nreverse (result
);
10754 result
= chainon (result
, void_list_node
);
10761 /* D is a constructor or overloaded `operator='.
10763 Let T be the class in which D is declared. Then, this function
10766 -1 if D's is an ill-formed constructor or copy assignment operator
10767 whose first parameter is of type `T'.
10768 0 if D is not a copy constructor or copy assignment
10770 1 if D is a copy constructor or copy assignment operator whose
10771 first parameter is a reference to non-const qualified T.
10772 2 if D is a copy constructor or copy assignment operator whose
10773 first parameter is a reference to const qualified T.
10775 This function can be used as a predicate. Positive values indicate
10776 a copy constructor and nonzero values indicate a copy assignment
10780 copy_fn_p (const_tree d
)
10786 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10788 if (TREE_CODE (d
) == TEMPLATE_DECL
10789 || (DECL_TEMPLATE_INFO (d
)
10790 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10791 /* Instantiations of template member functions are never copy
10792 functions. Note that member functions of templated classes are
10793 represented as template functions internally, and we must
10794 accept those as copy functions. */
10797 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10801 arg_type
= TREE_VALUE (args
);
10802 if (arg_type
== error_mark_node
)
10805 if (TYPE_MAIN_VARIANT (arg_type
) == DECL_CONTEXT (d
))
10807 /* Pass by value copy assignment operator. */
10810 else if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10811 && !TYPE_REF_IS_RVALUE (arg_type
)
10812 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)) == DECL_CONTEXT (d
))
10814 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type
)))
10820 args
= TREE_CHAIN (args
);
10822 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10823 /* There are more non-optional args. */
10829 /* D is a constructor or overloaded `operator='.
10831 Let T be the class in which D is declared. Then, this function
10832 returns true when D is a move constructor or move assignment
10833 operator, false otherwise. */
10836 move_fn_p (const_tree d
)
10840 bool result
= false;
10842 gcc_assert (DECL_FUNCTION_MEMBER_P (d
));
10844 if (cxx_dialect
== cxx98
)
10845 /* There are no move constructors if we are in C++98 mode. */
10848 if (TREE_CODE (d
) == TEMPLATE_DECL
10849 || (DECL_TEMPLATE_INFO (d
)
10850 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d
))))
10851 /* Instantiations of template member functions are never copy
10852 functions. Note that member functions of templated classes are
10853 represented as template functions internally, and we must
10854 accept those as copy functions. */
10857 args
= FUNCTION_FIRST_USER_PARMTYPE (d
);
10861 arg_type
= TREE_VALUE (args
);
10862 if (arg_type
== error_mark_node
)
10865 if (TREE_CODE (arg_type
) == REFERENCE_TYPE
10866 && TYPE_REF_IS_RVALUE (arg_type
)
10867 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type
)),
10871 args
= TREE_CHAIN (args
);
10873 if (args
&& args
!= void_list_node
&& !TREE_PURPOSE (args
))
10874 /* There are more non-optional args. */
10880 /* Remember any special properties of member function DECL. */
10883 grok_special_member_properties (tree decl
)
10887 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl
))
10890 class_type
= DECL_CONTEXT (decl
);
10891 if (DECL_CONSTRUCTOR_P (decl
))
10893 int ctor
= copy_fn_p (decl
);
10895 if (!DECL_ARTIFICIAL (decl
))
10896 TYPE_HAS_USER_CONSTRUCTOR (class_type
) = 1;
10902 A non-template constructor for class X is a copy
10903 constructor if its first parameter is of type X&, const
10904 X&, volatile X& or const volatile X&, and either there
10905 are no other parameters or else all other parameters have
10906 default arguments. */
10907 TYPE_HAS_COPY_CTOR (class_type
) = 1;
10908 if (user_provided_p (decl
))
10909 TYPE_HAS_COMPLEX_COPY_CTOR (class_type
) = 1;
10911 TYPE_HAS_CONST_COPY_CTOR (class_type
) = 1;
10913 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl
)))
10915 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type
) = 1;
10916 if (user_provided_p (decl
))
10917 TYPE_HAS_COMPLEX_DFLT (class_type
) = 1;
10919 else if (move_fn_p (decl
) && user_provided_p (decl
))
10920 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type
) = 1;
10921 else if (is_list_ctor (decl
))
10922 TYPE_HAS_LIST_CTOR (class_type
) = 1;
10924 if (DECL_DECLARED_CONSTEXPR_P (decl
)
10925 && !copy_fn_p (decl
) && !move_fn_p (decl
))
10926 TYPE_HAS_CONSTEXPR_CTOR (class_type
) = 1;
10928 else if (DECL_OVERLOADED_OPERATOR_P (decl
) == NOP_EXPR
)
10932 A non-template assignment operator for class X is a copy
10933 assignment operator if its parameter is of type X, X&, const
10934 X&, volatile X& or const volatile X&. */
10936 int assop
= copy_fn_p (decl
);
10940 TYPE_HAS_COPY_ASSIGN (class_type
) = 1;
10941 if (user_provided_p (decl
))
10942 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type
) = 1;
10944 TYPE_HAS_CONST_COPY_ASSIGN (class_type
) = 1;
10946 else if (move_fn_p (decl
) && user_provided_p (decl
))
10947 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type
) = 1;
10949 /* Destructors are handled in check_methods. */
10952 /* Check a constructor DECL has the correct form. Complains
10953 if the class has a constructor of the form X(X). */
10956 grok_ctor_properties (const_tree ctype
, const_tree decl
)
10958 int ctor_parm
= copy_fn_p (decl
);
10964 A declaration of a constructor for a class X is ill-formed if
10965 its first parameter is of type (optionally cv-qualified) X
10966 and either there are no other parameters or else all other
10967 parameters have default arguments.
10969 We *don't* complain about member template instantiations that
10970 have this form, though; they can occur as we try to decide
10971 what constructor to use during overload resolution. Since
10972 overload resolution will never prefer such a constructor to
10973 the non-template copy constructor (which is either explicitly
10974 or implicitly defined), there's no need to worry about their
10975 existence. Theoretically, they should never even be
10976 instantiated, but that's hard to forestall. */
10977 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10985 /* An operator with this code is unary, but can also be binary. */
10988 ambi_op_p (enum tree_code code
)
10990 return (code
== INDIRECT_REF
10991 || code
== ADDR_EXPR
10992 || code
== UNARY_PLUS_EXPR
10993 || code
== NEGATE_EXPR
10994 || code
== PREINCREMENT_EXPR
10995 || code
== PREDECREMENT_EXPR
);
10998 /* An operator with this name can only be unary. */
11001 unary_op_p (enum tree_code code
)
11003 return (code
== TRUTH_NOT_EXPR
11004 || code
== BIT_NOT_EXPR
11005 || code
== COMPONENT_REF
11006 || code
== TYPE_EXPR
);
11009 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
11010 errors are issued for invalid declarations. */
11013 grok_op_properties (tree decl
, bool complain
)
11015 tree argtypes
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
11017 int methodp
= (TREE_CODE (TREE_TYPE (decl
)) == METHOD_TYPE
);
11018 tree name
= DECL_NAME (decl
);
11019 enum tree_code operator_code
;
11024 /* Count the number of arguments and check for ellipsis. */
11025 for (argtype
= argtypes
, arity
= 0;
11026 argtype
&& argtype
!= void_list_node
;
11027 argtype
= TREE_CHAIN (argtype
))
11029 ellipsis_p
= !argtype
;
11031 class_type
= DECL_CONTEXT (decl
);
11032 if (class_type
&& !CLASS_TYPE_P (class_type
))
11033 class_type
= NULL_TREE
;
11035 if (DECL_CONV_FN_P (decl
))
11036 operator_code
= TYPE_EXPR
;
11040 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
11041 if (ansi_opname (CODE) == name) \
11043 operator_code = (CODE); \
11046 else if (ansi_assopname (CODE) == name) \
11048 operator_code = (CODE); \
11049 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
11053 #include "operators.def"
11054 #undef DEF_OPERATOR
11056 gcc_unreachable ();
11059 gcc_assert (operator_code
!= MAX_TREE_CODES
);
11060 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11063 switch (operator_code
)
11066 TYPE_HAS_NEW_OPERATOR (class_type
) = 1;
11070 TYPE_GETS_DELETE (class_type
) |= 1;
11074 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type
) = 1;
11077 case VEC_DELETE_EXPR
:
11078 TYPE_GETS_DELETE (class_type
) |= 2;
11085 /* [basic.std.dynamic.allocation]/1:
11087 A program is ill-formed if an allocation function is declared
11088 in a namespace scope other than global scope or declared static
11091 The same also holds true for deallocation functions. */
11092 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
11093 || operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11095 if (DECL_NAMESPACE_SCOPE_P (decl
))
11097 if (CP_DECL_CONTEXT (decl
) != global_namespace
)
11099 error ("%qD may not be declared within a namespace", decl
);
11102 else if (!TREE_PUBLIC (decl
))
11104 error ("%qD may not be declared as static", decl
);
11110 if (operator_code
== NEW_EXPR
|| operator_code
== VEC_NEW_EXPR
)
11112 TREE_TYPE (decl
) = coerce_new_type (TREE_TYPE (decl
));
11113 DECL_IS_OPERATOR_NEW (decl
) = 1;
11115 else if (operator_code
== DELETE_EXPR
|| operator_code
== VEC_DELETE_EXPR
)
11116 TREE_TYPE (decl
) = coerce_delete_type (TREE_TYPE (decl
));
11119 /* An operator function must either be a non-static member function
11120 or have at least one parameter of a class, a reference to a class,
11121 an enumeration, or a reference to an enumeration. 13.4.0.6 */
11122 if (! methodp
|| DECL_STATIC_FUNCTION_P (decl
))
11124 if (operator_code
== TYPE_EXPR
11125 || operator_code
== CALL_EXPR
11126 || operator_code
== COMPONENT_REF
11127 || operator_code
== ARRAY_REF
11128 || operator_code
== NOP_EXPR
)
11130 error ("%qD must be a nonstatic member function", decl
);
11137 if (DECL_STATIC_FUNCTION_P (decl
))
11139 error ("%qD must be either a non-static member "
11140 "function or a non-member function", decl
);
11144 for (p
= argtypes
; p
&& p
!= void_list_node
; p
= TREE_CHAIN (p
))
11146 tree arg
= non_reference (TREE_VALUE (p
));
11147 if (arg
== error_mark_node
)
11150 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
11151 because these checks are performed even on
11152 template functions. */
11153 if (MAYBE_CLASS_TYPE_P (arg
)
11154 || TREE_CODE (arg
) == ENUMERAL_TYPE
)
11158 if (!p
|| p
== void_list_node
)
11161 error ("%qD must have an argument of class or "
11162 "enumerated type", decl
);
11168 /* There are no restrictions on the arguments to an overloaded
11170 if (operator_code
== CALL_EXPR
)
11173 /* Warn about conversion operators that will never be used. */
11174 if (IDENTIFIER_TYPENAME_P (name
)
11175 && ! DECL_TEMPLATE_INFO (decl
)
11177 /* Warn only declaring the function; there is no need to
11178 warn again about out-of-class definitions. */
11179 && class_type
== current_class_type
)
11181 tree t
= TREE_TYPE (name
);
11182 int ref
= (TREE_CODE (t
) == REFERENCE_TYPE
);
11185 t
= TYPE_MAIN_VARIANT (TREE_TYPE (t
));
11187 if (TREE_CODE (t
) == VOID_TYPE
)
11188 warning (OPT_Wconversion
,
11190 ? G_("conversion to a reference to void "
11191 "will never use a type conversion operator")
11192 : G_("conversion to void "
11193 "will never use a type conversion operator"));
11194 else if (class_type
)
11196 if (t
== class_type
)
11197 warning (OPT_Wconversion
,
11199 ? G_("conversion to a reference to the same type "
11200 "will never use a type conversion operator")
11201 : G_("conversion to the same type "
11202 "will never use a type conversion operator"));
11203 /* Don't force t to be complete here. */
11204 else if (MAYBE_CLASS_TYPE_P (t
)
11205 && COMPLETE_TYPE_P (t
)
11206 && DERIVED_FROM_P (t
, class_type
))
11207 warning (OPT_Wconversion
,
11209 ? G_("conversion to a reference to a base class "
11210 "will never use a type conversion operator")
11211 : G_("conversion to a base class "
11212 "will never use a type conversion operator"));
11217 if (operator_code
== COND_EXPR
)
11220 error ("ISO C++ prohibits overloading operator ?:");
11223 else if (ellipsis_p
)
11225 error ("%qD must not have variable number of arguments", decl
);
11228 else if (ambi_op_p (operator_code
))
11231 /* We pick the one-argument operator codes by default, so
11232 we don't have to change anything. */
11234 else if (arity
== 2)
11236 /* If we thought this was a unary operator, we now know
11237 it to be a binary operator. */
11238 switch (operator_code
)
11241 operator_code
= MULT_EXPR
;
11245 operator_code
= BIT_AND_EXPR
;
11248 case UNARY_PLUS_EXPR
:
11249 operator_code
= PLUS_EXPR
;
11253 operator_code
= MINUS_EXPR
;
11256 case PREINCREMENT_EXPR
:
11257 operator_code
= POSTINCREMENT_EXPR
;
11260 case PREDECREMENT_EXPR
:
11261 operator_code
= POSTDECREMENT_EXPR
;
11265 gcc_unreachable ();
11268 SET_OVERLOADED_OPERATOR_CODE (decl
, operator_code
);
11270 if ((operator_code
== POSTINCREMENT_EXPR
11271 || operator_code
== POSTDECREMENT_EXPR
)
11272 && ! processing_template_decl
11273 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes
)), integer_type_node
))
11276 error ("postfix %qD must take %<int%> as its argument",
11279 error ("postfix %qD must take %<int%> as its second "
11287 error ("%qD must take either zero or one argument", decl
);
11289 error ("%qD must take either one or two arguments", decl
);
11293 /* More Effective C++ rule 6. */
11295 && (operator_code
== POSTINCREMENT_EXPR
11296 || operator_code
== POSTDECREMENT_EXPR
11297 || operator_code
== PREINCREMENT_EXPR
11298 || operator_code
== PREDECREMENT_EXPR
))
11300 tree arg
= TREE_VALUE (argtypes
);
11301 tree ret
= TREE_TYPE (TREE_TYPE (decl
));
11302 if (methodp
|| TREE_CODE (arg
) == REFERENCE_TYPE
)
11303 arg
= TREE_TYPE (arg
);
11304 arg
= TYPE_MAIN_VARIANT (arg
);
11305 if (operator_code
== PREINCREMENT_EXPR
11306 || operator_code
== PREDECREMENT_EXPR
)
11308 if (TREE_CODE (ret
) != REFERENCE_TYPE
11309 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret
)),
11311 warning (OPT_Weffc__
, "prefix %qD should return %qT", decl
,
11312 build_reference_type (arg
));
11316 if (!same_type_p (TYPE_MAIN_VARIANT (ret
), arg
))
11317 warning (OPT_Weffc__
, "postfix %qD should return %qT", decl
, arg
);
11321 else if (unary_op_p (operator_code
))
11326 error ("%qD must take %<void%>", decl
);
11328 error ("%qD must take exactly one argument", decl
);
11332 else /* if (binary_op_p (operator_code)) */
11337 error ("%qD must take exactly one argument", decl
);
11339 error ("%qD must take exactly two arguments", decl
);
11343 /* More Effective C++ rule 7. */
11345 && (operator_code
== TRUTH_ANDIF_EXPR
11346 || operator_code
== TRUTH_ORIF_EXPR
11347 || operator_code
== COMPOUND_EXPR
))
11348 warning (OPT_Weffc__
, "user-defined %qD always evaluates both arguments",
11352 /* Effective C++ rule 23. */
11355 && !DECL_ASSIGNMENT_OPERATOR_P (decl
)
11356 && (operator_code
== PLUS_EXPR
11357 || operator_code
== MINUS_EXPR
11358 || operator_code
== TRUNC_DIV_EXPR
11359 || operator_code
== MULT_EXPR
11360 || operator_code
== TRUNC_MOD_EXPR
)
11361 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl
))) == REFERENCE_TYPE
)
11362 warning (OPT_Weffc__
, "%qD should return by value", decl
);
11364 /* [over.oper]/8 */
11365 for (; argtypes
&& argtypes
!= void_list_node
;
11366 argtypes
= TREE_CHAIN (argtypes
))
11367 if (TREE_PURPOSE (argtypes
))
11369 TREE_PURPOSE (argtypes
) = NULL_TREE
;
11370 if (operator_code
== POSTINCREMENT_EXPR
11371 || operator_code
== POSTDECREMENT_EXPR
)
11373 pedwarn (input_location
, OPT_pedantic
, "%qD cannot have default arguments",
11378 error ("%qD cannot have default arguments", decl
);
11386 /* Return a string giving the keyword associate with CODE. */
11388 static const char *
11389 tag_name (enum tag_types code
)
11401 case typename_type
:
11404 gcc_unreachable ();
11408 /* Name lookup in an elaborated-type-specifier (after the keyword
11409 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11410 elaborated-type-specifier is invalid, issue a diagnostic and return
11411 error_mark_node; otherwise, return the *_TYPE to which it referred.
11412 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11415 check_elaborated_type_specifier (enum tag_types tag_code
,
11417 bool allow_template_p
)
11421 if (decl
== error_mark_node
)
11422 return error_mark_node
;
11426 struct S { struct S *p; };
11428 name lookup will find the TYPE_DECL for the implicit "S::S"
11429 typedef. Adjust for that here. */
11430 if (DECL_SELF_REFERENCE_P (decl
))
11431 decl
= TYPE_NAME (TREE_TYPE (decl
));
11433 type
= TREE_TYPE (decl
);
11435 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11436 is false for this case as well. */
11437 if (TREE_CODE (type
) == TEMPLATE_TYPE_PARM
)
11439 error ("using template type parameter %qT after %qs",
11440 type
, tag_name (tag_code
));
11441 return error_mark_node
;
11443 /* Accept bound template template parameters. */
11444 else if (allow_template_p
11445 && TREE_CODE (type
) == BOUND_TEMPLATE_TEMPLATE_PARM
)
11449 If the identifier resolves to a typedef-name or the
11450 simple-template-id resolves to an alias template
11451 specialization, the elaborated-type-specifier is ill-formed.
11453 In other words, the only legitimate declaration to use in the
11454 elaborated type specifier is the implicit typedef created when
11455 the type is declared. */
11456 else if (!DECL_IMPLICIT_TYPEDEF_P (decl
)
11457 && !DECL_SELF_REFERENCE_P (decl
)
11458 && tag_code
!= typename_type
)
11460 if (alias_template_specialization_p (type
))
11461 error ("using alias template specialization %qT after %qs",
11462 type
, tag_name (tag_code
));
11464 error ("using typedef-name %qD after %qs", decl
, tag_name (tag_code
));
11465 inform (DECL_SOURCE_LOCATION (decl
),
11466 "%qD has a previous declaration here", decl
);
11467 return error_mark_node
;
11469 else if (TREE_CODE (type
) != RECORD_TYPE
11470 && TREE_CODE (type
) != UNION_TYPE
11471 && tag_code
!= enum_type
11472 && tag_code
!= typename_type
)
11474 error ("%qT referred to as %qs", type
, tag_name (tag_code
));
11475 error ("%q+T has a previous declaration here", type
);
11476 return error_mark_node
;
11478 else if (TREE_CODE (type
) != ENUMERAL_TYPE
11479 && tag_code
== enum_type
)
11481 error ("%qT referred to as enum", type
);
11482 error ("%q+T has a previous declaration here", type
);
11483 return error_mark_node
;
11485 else if (!allow_template_p
11486 && TREE_CODE (type
) == RECORD_TYPE
11487 && CLASSTYPE_IS_TEMPLATE (type
))
11489 /* If a class template appears as elaborated type specifier
11490 without a template header such as:
11492 template <class T> class C {};
11493 void f(class C); // No template header here
11495 then the required template argument is missing. */
11496 error ("template argument required for %<%s %T%>",
11497 tag_name (tag_code
),
11498 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type
)));
11499 return error_mark_node
;
11505 /* Lookup NAME in elaborate type specifier in scope according to
11506 SCOPE and issue diagnostics if necessary.
11507 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11508 found, and ERROR_MARK_NODE for type error. */
11511 lookup_and_check_tag (enum tag_types tag_code
, tree name
,
11512 tag_scope scope
, bool template_header_p
)
11516 if (scope
== ts_global
)
11518 /* First try ordinary name lookup, ignoring hidden class name
11519 injected via friend declaration. */
11520 decl
= lookup_name_prefer_type (name
, 2);
11521 /* If that fails, the name will be placed in the smallest
11522 non-class, non-function-prototype scope according to 3.3.1/5.
11523 We may already have a hidden name declared as friend in this
11524 scope. So lookup again but not ignoring hidden names.
11525 If we find one, that name will be made visible rather than
11526 creating a new tag. */
11528 decl
= lookup_type_scope (name
, ts_within_enclosing_non_class
);
11531 decl
= lookup_type_scope (name
, scope
);
11533 if (decl
&& DECL_CLASS_TEMPLATE_P (decl
))
11534 decl
= DECL_TEMPLATE_RESULT (decl
);
11536 if (decl
&& TREE_CODE (decl
) == TYPE_DECL
)
11538 /* Look for invalid nested type:
11542 if (scope
== ts_current
&& DECL_SELF_REFERENCE_P (decl
))
11544 error ("%qD has the same name as the class in which it is "
11547 return error_mark_node
;
11550 /* Two cases we need to consider when deciding if a class
11551 template is allowed as an elaborated type specifier:
11552 1. It is a self reference to its own class.
11553 2. It comes with a template header.
11557 template <class T> class C {
11558 class C *c1; // DECL_SELF_REFERENCE_P is true
11561 template <class U> class C; // template_header_p is true
11562 template <class T> class C<T>::D {
11563 class C *c2; // DECL_SELF_REFERENCE_P is true
11566 t
= check_elaborated_type_specifier (tag_code
,
11569 | DECL_SELF_REFERENCE_P (decl
));
11572 else if (decl
&& TREE_CODE (decl
) == TREE_LIST
)
11574 error ("reference to %qD is ambiguous", name
);
11575 print_candidates (decl
);
11576 return error_mark_node
;
11582 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11583 Define the tag as a forward-reference if it is not defined.
11585 If a declaration is given, process it here, and report an error if
11586 multiple declarations are not identical.
11588 SCOPE is TS_CURRENT when this is also a definition. Only look in
11589 the current frame for the name (since C++ allows new names in any
11590 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11591 declaration. Only look beginning from the current scope outward up
11592 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11594 TEMPLATE_HEADER_P is true when this declaration is preceded by
11595 a set of template parameters. */
11598 xref_tag_1 (enum tag_types tag_code
, tree name
,
11599 tag_scope scope
, bool template_header_p
)
11601 enum tree_code code
;
11603 tree context
= NULL_TREE
;
11605 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
11611 code
= RECORD_TYPE
;
11617 code
= ENUMERAL_TYPE
;
11620 gcc_unreachable ();
11623 /* In case of anonymous name, xref_tag is only called to
11624 make type node and push name. Name lookup is not required. */
11625 if (ANON_AGGRNAME_P (name
))
11628 t
= lookup_and_check_tag (tag_code
, name
,
11629 scope
, template_header_p
);
11631 if (t
== error_mark_node
)
11632 return error_mark_node
;
11634 if (scope
!= ts_current
&& t
&& current_class_type
11635 && template_class_depth (current_class_type
)
11636 && template_header_p
)
11638 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11639 definition of this tag. Since, in addition, we are currently
11640 processing a (member) template declaration of a template
11641 class, we must be very careful; consider:
11648 { template <class V>
11649 friend struct S1; };
11651 Here, the S2::S1 declaration should not be confused with the
11652 outer declaration. In particular, the inner version should
11653 have a template parameter of level 2, not level 1. This
11654 would be particularly important if the member declaration
11657 template <class V = U> friend struct S1;
11659 say, when we should tsubst into `U' when instantiating
11660 S2. On the other hand, when presented with:
11670 we must find the inner binding eventually. We
11671 accomplish this by making sure that the new type we
11672 create to represent this declaration has the right
11674 context
= TYPE_CONTEXT (t
);
11680 /* If no such tag is yet defined, create a forward-reference node
11681 and record it as the "definition".
11682 When a real declaration of this type is found,
11683 the forward-reference will be altered into a real type. */
11684 if (code
== ENUMERAL_TYPE
)
11686 error ("use of enum %q#D without previous declaration", name
);
11687 return error_mark_node
;
11691 t
= make_class_type (code
);
11692 TYPE_CONTEXT (t
) = context
;
11693 t
= pushtag (name
, t
, scope
);
11698 if (template_header_p
&& MAYBE_CLASS_TYPE_P (t
))
11700 if (!redeclare_class_template (t
, current_template_parms
))
11701 return error_mark_node
;
11703 else if (!processing_template_decl
11704 && CLASS_TYPE_P (t
)
11705 && CLASSTYPE_IS_TEMPLATE (t
))
11707 error ("redeclaration of %qT as a non-template", t
);
11708 error ("previous declaration %q+D", t
);
11709 return error_mark_node
;
11712 /* Make injected friend class visible. */
11713 if (scope
!= ts_within_enclosing_non_class
11714 && hidden_name_p (TYPE_NAME (t
)))
11716 DECL_ANTICIPATED (TYPE_NAME (t
)) = 0;
11717 DECL_FRIEND_P (TYPE_NAME (t
)) = 0;
11719 if (TYPE_TEMPLATE_INFO (t
))
11721 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t
)) = 0;
11722 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t
)) = 0;
11730 /* Wrapper for xref_tag_1. */
11733 xref_tag (enum tag_types tag_code
, tree name
,
11734 tag_scope scope
, bool template_header_p
)
11738 subtime
= timevar_cond_start (TV_NAME_LOOKUP
);
11739 ret
= xref_tag_1 (tag_code
, name
, scope
, template_header_p
);
11740 timevar_cond_stop (TV_NAME_LOOKUP
, subtime
);
11746 xref_tag_from_type (tree old
, tree id
, tag_scope scope
)
11748 enum tag_types tag_kind
;
11750 if (TREE_CODE (old
) == RECORD_TYPE
)
11751 tag_kind
= (CLASSTYPE_DECLARED_CLASS (old
) ? class_type
: record_type
);
11753 tag_kind
= union_type
;
11755 if (id
== NULL_TREE
)
11756 id
= TYPE_IDENTIFIER (old
);
11758 return xref_tag (tag_kind
, id
, scope
, false);
11761 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11762 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11763 access_* node, and the TREE_VALUE is the type of the base-class.
11764 Non-NULL TREE_TYPE indicates virtual inheritance.
11766 Returns true if the binfo hierarchy was successfully created,
11767 false if an error was detected. */
11770 xref_basetypes (tree ref
, tree base_list
)
11773 tree binfo
, base_binfo
;
11774 unsigned max_vbases
= 0; /* Maximum direct & indirect virtual bases. */
11775 unsigned max_bases
= 0; /* Maximum direct bases. */
11777 tree default_access
;
11778 tree igo_prev
; /* Track Inheritance Graph Order. */
11780 if (ref
== error_mark_node
)
11783 /* The base of a derived class is private by default, all others are
11785 default_access
= (TREE_CODE (ref
) == RECORD_TYPE
11786 && CLASSTYPE_DECLARED_CLASS (ref
)
11787 ? access_private_node
: access_public_node
);
11789 /* First, make sure that any templates in base-classes are
11790 instantiated. This ensures that if we call ourselves recursively
11791 we do not get confused about which classes are marked and which
11793 basep
= &base_list
;
11796 tree basetype
= TREE_VALUE (*basep
);
11798 if (!(processing_template_decl
&& uses_template_parms (basetype
))
11799 && !complete_type_or_else (basetype
, NULL
))
11800 /* An incomplete type. Remove it from the list. */
11801 *basep
= TREE_CHAIN (*basep
);
11805 if (TREE_TYPE (*basep
))
11807 if (CLASS_TYPE_P (basetype
))
11808 max_vbases
+= VEC_length (tree
, CLASSTYPE_VBASECLASSES (basetype
));
11809 basep
= &TREE_CHAIN (*basep
);
11813 TYPE_MARKED_P (ref
) = 1;
11815 /* The binfo slot should be empty, unless this is an (ill-formed)
11817 if (TYPE_BINFO (ref
) && !TYPE_SIZE (ref
))
11819 error ("redefinition of %q#T", ref
);
11823 gcc_assert (TYPE_MAIN_VARIANT (ref
) == ref
);
11825 binfo
= make_tree_binfo (max_bases
);
11827 TYPE_BINFO (ref
) = binfo
;
11828 BINFO_OFFSET (binfo
) = size_zero_node
;
11829 BINFO_TYPE (binfo
) = ref
;
11831 /* Apply base-class info set up to the variants of this type. */
11832 fixup_type_variants (ref
);
11836 BINFO_BASE_ACCESSES (binfo
) = VEC_alloc (tree
, gc
, max_bases
);
11837 /* An aggregate cannot have baseclasses. */
11838 CLASSTYPE_NON_AGGREGATE (ref
) = 1;
11840 if (TREE_CODE (ref
) == UNION_TYPE
)
11842 error ("derived union %qT invalid", ref
);
11849 if (TYPE_FOR_JAVA (ref
))
11851 error ("Java class %qT cannot have multiple bases", ref
);
11858 CLASSTYPE_VBASECLASSES (ref
) = VEC_alloc (tree
, gc
, max_vbases
);
11860 if (TYPE_FOR_JAVA (ref
))
11862 error ("Java class %qT cannot have virtual bases", ref
);
11867 for (igo_prev
= binfo
; base_list
; base_list
= TREE_CHAIN (base_list
))
11869 tree access
= TREE_PURPOSE (base_list
);
11870 int via_virtual
= TREE_TYPE (base_list
) != NULL_TREE
;
11871 tree basetype
= TREE_VALUE (base_list
);
11873 if (access
== access_default_node
)
11874 access
= default_access
;
11876 if (PACK_EXPANSION_P (basetype
))
11877 basetype
= PACK_EXPANSION_PATTERN (basetype
);
11878 if (TREE_CODE (basetype
) == TYPE_DECL
)
11879 basetype
= TREE_TYPE (basetype
);
11880 if (!MAYBE_CLASS_TYPE_P (basetype
) || TREE_CODE (basetype
) == UNION_TYPE
)
11882 error ("base type %qT fails to be a struct or class type",
11887 if (TYPE_FOR_JAVA (basetype
) && (current_lang_depth () == 0))
11888 TYPE_FOR_JAVA (ref
) = 1;
11890 base_binfo
= NULL_TREE
;
11891 if (CLASS_TYPE_P (basetype
) && !dependent_scope_p (basetype
))
11893 base_binfo
= TYPE_BINFO (basetype
);
11894 /* The original basetype could have been a typedef'd type. */
11895 basetype
= BINFO_TYPE (base_binfo
);
11897 /* Inherit flags from the base. */
11898 TYPE_HAS_NEW_OPERATOR (ref
)
11899 |= TYPE_HAS_NEW_OPERATOR (basetype
);
11900 TYPE_HAS_ARRAY_NEW_OPERATOR (ref
)
11901 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype
);
11902 TYPE_GETS_DELETE (ref
) |= TYPE_GETS_DELETE (basetype
);
11903 TYPE_HAS_CONVERSION (ref
) |= TYPE_HAS_CONVERSION (basetype
);
11904 CLASSTYPE_DIAMOND_SHAPED_P (ref
)
11905 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype
);
11906 CLASSTYPE_REPEATED_BASE_P (ref
)
11907 |= CLASSTYPE_REPEATED_BASE_P (basetype
);
11910 /* We must do this test after we've seen through a typedef
11912 if (TYPE_MARKED_P (basetype
))
11914 if (basetype
== ref
)
11915 error ("recursive type %qT undefined", basetype
);
11917 error ("duplicate base type %qT invalid", basetype
);
11921 if (PACK_EXPANSION_P (TREE_VALUE (base_list
)))
11922 /* Regenerate the pack expansion for the bases. */
11923 basetype
= make_pack_expansion (basetype
);
11925 TYPE_MARKED_P (basetype
) = 1;
11927 base_binfo
= copy_binfo (base_binfo
, basetype
, ref
,
11928 &igo_prev
, via_virtual
);
11929 if (!BINFO_INHERITANCE_CHAIN (base_binfo
))
11930 BINFO_INHERITANCE_CHAIN (base_binfo
) = binfo
;
11932 BINFO_BASE_APPEND (binfo
, base_binfo
);
11933 BINFO_BASE_ACCESS_APPEND (binfo
, access
);
11936 if (VEC_length (tree
, CLASSTYPE_VBASECLASSES (ref
)) < max_vbases
)
11937 /* If we didn't get max_vbases vbases, we must have shared at
11938 least one of them, and are therefore diamond shaped. */
11939 CLASSTYPE_DIAMOND_SHAPED_P (ref
) = 1;
11941 /* Unmark all the types. */
11942 for (i
= 0; BINFO_BASE_ITERATE (binfo
, i
, base_binfo
); i
++)
11943 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11944 TYPE_MARKED_P (ref
) = 0;
11946 /* Now see if we have a repeated base type. */
11947 if (!CLASSTYPE_REPEATED_BASE_P (ref
))
11949 for (base_binfo
= binfo
; base_binfo
;
11950 base_binfo
= TREE_CHAIN (base_binfo
))
11952 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11954 CLASSTYPE_REPEATED_BASE_P (ref
) = 1;
11957 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 1;
11959 for (base_binfo
= binfo
; base_binfo
;
11960 base_binfo
= TREE_CHAIN (base_binfo
))
11961 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo
)))
11962 TYPE_MARKED_P (BINFO_TYPE (base_binfo
)) = 0;
11971 /* Copies the enum-related properties from type SRC to type DST.
11972 Used with the underlying type of an enum and the enum itself. */
11974 copy_type_enum (tree dst
, tree src
)
11977 for (t
= dst
; t
; t
= TYPE_NEXT_VARIANT (t
))
11979 TYPE_MIN_VALUE (t
) = TYPE_MIN_VALUE (src
);
11980 TYPE_MAX_VALUE (t
) = TYPE_MAX_VALUE (src
);
11981 TYPE_SIZE (t
) = TYPE_SIZE (src
);
11982 TYPE_SIZE_UNIT (t
) = TYPE_SIZE_UNIT (src
);
11983 SET_TYPE_MODE (dst
, TYPE_MODE (src
));
11984 TYPE_PRECISION (t
) = TYPE_PRECISION (src
);
11985 TYPE_ALIGN (t
) = TYPE_ALIGN (src
);
11986 TYPE_USER_ALIGN (t
) = TYPE_USER_ALIGN (src
);
11987 TYPE_UNSIGNED (t
) = TYPE_UNSIGNED (src
);
11991 /* Begin compiling the definition of an enumeration type.
11994 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11996 UNDERLYING_TYPE is the type that will be used as the storage for
11997 the enumeration type. This should be NULL_TREE if no storage type
12000 SCOPED_ENUM_P is true if this is a scoped enumeration type.
12002 if IS_NEW is not NULL, gets TRUE iff a new type is created.
12004 Returns the type object, as yet incomplete.
12005 Also records info about it so that build_enumerator
12006 may be used to declare the individual values as they are read. */
12009 start_enum (tree name
, tree enumtype
, tree underlying_type
,
12010 bool scoped_enum_p
, bool *is_new
)
12012 tree prevtype
= NULL_TREE
;
12013 gcc_assert (TREE_CODE (name
) == IDENTIFIER_NODE
);
12017 /* [C++0x dcl.enum]p5:
12019 If not explicitly specified, the underlying type of a scoped
12020 enumeration type is int. */
12021 if (!underlying_type
&& scoped_enum_p
)
12022 underlying_type
= integer_type_node
;
12024 if (underlying_type
)
12025 underlying_type
= cv_unqualified (underlying_type
);
12027 /* If this is the real definition for a previous forward reference,
12028 fill in the contents in the same object that used to be the
12029 forward reference. */
12031 enumtype
= lookup_and_check_tag (enum_type
, name
,
12032 /*tag_scope=*/ts_current
,
12033 /*template_header_p=*/false);
12035 /* In case of a template_decl, the only check that should be deferred
12036 to instantiation time is the comparison of underlying types. */
12037 if (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
)
12039 if (scoped_enum_p
!= SCOPED_ENUM_P (enumtype
))
12041 error_at (input_location
, "scoped/unscoped mismatch "
12042 "in enum %q#T", enumtype
);
12043 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12044 "previous definition here");
12045 enumtype
= error_mark_node
;
12047 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) != !! underlying_type
)
12049 error_at (input_location
, "underlying type mismatch "
12050 "in enum %q#T", enumtype
);
12051 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12052 "previous definition here");
12053 enumtype
= error_mark_node
;
12055 else if (underlying_type
&& ENUM_UNDERLYING_TYPE (enumtype
)
12056 && !dependent_type_p (underlying_type
)
12057 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))
12058 && !same_type_p (underlying_type
,
12059 ENUM_UNDERLYING_TYPE (enumtype
)))
12061 error_at (input_location
, "different underlying type "
12062 "in enum %q#T", enumtype
);
12063 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype
)),
12064 "previous definition here");
12065 underlying_type
= NULL_TREE
;
12069 if (!enumtype
|| TREE_CODE (enumtype
) != ENUMERAL_TYPE
12070 || processing_template_decl
)
12072 /* In case of error, make a dummy enum to allow parsing to
12074 if (enumtype
== error_mark_node
)
12076 name
= make_anon_name ();
12077 enumtype
= NULL_TREE
;
12080 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
12081 of an opaque enum, or an opaque enum of an already defined
12082 enumeration (C++0x only).
12083 In any other case, it'll be NULL_TREE. */
12089 prevtype
= enumtype
;
12091 /* Do not push the decl more than once, unless we need to
12092 compare underlying types at instantiation time */
12094 || TREE_CODE (enumtype
) != ENUMERAL_TYPE
12095 || (underlying_type
12096 && dependent_type_p (underlying_type
))
12097 || (ENUM_UNDERLYING_TYPE (enumtype
)
12098 && dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype
))))
12100 enumtype
= cxx_make_type (ENUMERAL_TYPE
);
12101 enumtype
= pushtag (name
, enumtype
, /*tag_scope=*/ts_current
);
12104 enumtype
= xref_tag (enum_type
, name
, /*tag_scope=*/ts_current
,
12107 if (enumtype
== error_mark_node
)
12108 return error_mark_node
;
12110 /* The enum is considered opaque until the opening '{' of the
12111 enumerator list. */
12112 SET_OPAQUE_ENUM_P (enumtype
, true);
12113 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype
) = !! underlying_type
;
12116 SET_SCOPED_ENUM_P (enumtype
, scoped_enum_p
);
12118 if (underlying_type
)
12120 if (CP_INTEGRAL_TYPE_P (underlying_type
))
12122 copy_type_enum (enumtype
, underlying_type
);
12123 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12125 else if (dependent_type_p (underlying_type
))
12126 ENUM_UNDERLYING_TYPE (enumtype
) = underlying_type
;
12128 error ("underlying type %<%T%> of %<%T%> must be an integral type",
12129 underlying_type
, enumtype
);
12132 /* If into a template class, the returned enum is always the first
12133 declaration (opaque or not) seen. This way all the references to
12134 this type will be to the same declaration. The following ones are used
12135 only to check for definition errors. */
12136 if (prevtype
&& processing_template_decl
)
12142 /* After processing and defining all the values of an enumeration type,
12143 install their decls in the enumeration type.
12144 ENUMTYPE is the type object. */
12147 finish_enum_value_list (tree enumtype
)
12150 tree underlying_type
;
12153 tree minnode
, maxnode
;
12156 bool fixed_underlying_type_p
12157 = ENUM_UNDERLYING_TYPE (enumtype
) != NULL_TREE
;
12159 /* We built up the VALUES in reverse order. */
12160 TYPE_VALUES (enumtype
) = nreverse (TYPE_VALUES (enumtype
));
12162 /* For an enum defined in a template, just set the type of the values;
12163 all further processing is postponed until the template is
12164 instantiated. We need to set the type so that tsubst of a CONST_DECL
12166 if (processing_template_decl
)
12168 for (values
= TYPE_VALUES (enumtype
);
12170 values
= TREE_CHAIN (values
))
12171 TREE_TYPE (TREE_VALUE (values
)) = enumtype
;
12175 /* Determine the minimum and maximum values of the enumerators. */
12176 if (TYPE_VALUES (enumtype
))
12178 minnode
= maxnode
= NULL_TREE
;
12180 for (values
= TYPE_VALUES (enumtype
);
12182 values
= TREE_CHAIN (values
))
12184 decl
= TREE_VALUE (values
);
12186 /* [dcl.enum]: Following the closing brace of an enum-specifier,
12187 each enumerator has the type of its enumeration. Prior to the
12188 closing brace, the type of each enumerator is the type of its
12189 initializing value. */
12190 TREE_TYPE (decl
) = enumtype
;
12192 /* Update the minimum and maximum values, if appropriate. */
12193 value
= DECL_INITIAL (decl
);
12194 if (value
== error_mark_node
)
12195 value
= integer_zero_node
;
12196 /* Figure out what the minimum and maximum values of the
12197 enumerators are. */
12199 minnode
= maxnode
= value
;
12200 else if (tree_int_cst_lt (maxnode
, value
))
12202 else if (tree_int_cst_lt (value
, minnode
))
12209 If the enumerator-list is empty, the underlying type is as if
12210 the enumeration had a single enumerator with value 0. */
12211 minnode
= maxnode
= integer_zero_node
;
12213 if (!fixed_underlying_type_p
)
12215 /* Compute the number of bits require to represent all values of the
12216 enumeration. We must do this before the type of MINNODE and
12217 MAXNODE are transformed, since tree_int_cst_min_precision relies
12218 on the TREE_TYPE of the value it is passed. */
12219 bool unsignedp
= tree_int_cst_sgn (minnode
) >= 0;
12220 int lowprec
= tree_int_cst_min_precision (minnode
, unsignedp
);
12221 int highprec
= tree_int_cst_min_precision (maxnode
, unsignedp
);
12222 int precision
= MAX (lowprec
, highprec
);
12224 bool use_short_enum
;
12226 /* Determine the underlying type of the enumeration.
12230 The underlying type of an enumeration is an integral type that
12231 can represent all the enumerator values defined in the
12232 enumeration. It is implementation-defined which integral type is
12233 used as the underlying type for an enumeration except that the
12234 underlying type shall not be larger than int unless the value of
12235 an enumerator cannot fit in an int or unsigned int.
12237 We use "int" or an "unsigned int" as the underlying type, even if
12238 a smaller integral type would work, unless the user has
12239 explicitly requested that we use the smallest possible type. The
12240 user can request that for all enumerations with a command line
12241 flag, or for just one enumeration with an attribute. */
12243 use_short_enum
= flag_short_enums
12244 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype
));
12246 for (itk
= (use_short_enum
? itk_char
: itk_int
);
12250 underlying_type
= integer_types
[itk
];
12251 if (underlying_type
!= NULL_TREE
12252 && TYPE_PRECISION (underlying_type
) >= precision
12253 && TYPE_UNSIGNED (underlying_type
) == unsignedp
)
12256 if (itk
== itk_none
)
12260 IF no integral type can represent all the enumerator values, the
12261 enumeration is ill-formed. */
12262 error ("no integral type can represent all of the enumerator values "
12263 "for %qT", enumtype
);
12264 precision
= TYPE_PRECISION (long_long_integer_type_node
);
12265 underlying_type
= integer_types
[itk_unsigned_long_long
];
12270 The value of sizeof() applied to an enumeration type, an object
12271 of an enumeration type, or an enumerator, is the value of sizeof()
12272 applied to the underlying type. */
12273 copy_type_enum (enumtype
, underlying_type
);
12275 /* Compute the minimum and maximum values for the type.
12279 For an enumeration where emin is the smallest enumerator and emax
12280 is the largest, the values of the enumeration are the values of the
12281 underlying type in the range bmin to bmax, where bmin and bmax are,
12282 respectively, the smallest and largest values of the smallest bit-
12283 field that can store emin and emax. */
12285 /* The middle-end currently assumes that types with TYPE_PRECISION
12286 narrower than their underlying type are suitably zero or sign
12287 extended to fill their mode. Similarly, it assumes that the front
12288 end assures that a value of a particular type must be within
12289 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12291 We used to set these fields based on bmin and bmax, but that led
12292 to invalid assumptions like optimizing away bounds checking. So
12293 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12294 TYPE_MAX_VALUE to the values for the mode above and only restrict
12295 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12296 ENUM_UNDERLYING_TYPE (enumtype
)
12297 = build_distinct_type_copy (underlying_type
);
12298 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype
)) = precision
;
12299 set_min_and_max_values_for_integral_type
12300 (ENUM_UNDERLYING_TYPE (enumtype
), precision
, unsignedp
);
12302 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12303 if (flag_strict_enums
)
12304 set_min_and_max_values_for_integral_type (enumtype
, precision
,
12308 underlying_type
= ENUM_UNDERLYING_TYPE (enumtype
);
12310 /* Convert each of the enumerators to the type of the underlying
12311 type of the enumeration. */
12312 for (values
= TYPE_VALUES (enumtype
); values
; values
= TREE_CHAIN (values
))
12314 location_t saved_location
;
12316 decl
= TREE_VALUE (values
);
12317 saved_location
= input_location
;
12318 input_location
= DECL_SOURCE_LOCATION (decl
);
12319 if (fixed_underlying_type_p
)
12320 /* If the enumeration type has a fixed underlying type, we
12321 already checked all of the enumerator values. */
12322 value
= DECL_INITIAL (decl
);
12324 value
= perform_implicit_conversion (underlying_type
,
12325 DECL_INITIAL (decl
),
12326 tf_warning_or_error
);
12327 input_location
= saved_location
;
12329 /* Do not clobber shared ints. */
12330 value
= copy_node (value
);
12332 TREE_TYPE (value
) = enumtype
;
12333 DECL_INITIAL (decl
) = value
;
12336 /* Fix up all variant types of this enum type. */
12337 for (t
= TYPE_MAIN_VARIANT (enumtype
); t
; t
= TYPE_NEXT_VARIANT (t
))
12338 TYPE_VALUES (t
) = TYPE_VALUES (enumtype
);
12340 /* Finish debugging output for this type. */
12341 rest_of_type_compilation (enumtype
, namespace_bindings_p ());
12344 /* Finishes the enum type. This is called only the first time an
12345 enumeration is seen, be it opaque or odinary.
12346 ENUMTYPE is the type object. */
12349 finish_enum (tree enumtype
)
12351 if (processing_template_decl
)
12353 if (at_function_scope_p ())
12354 add_stmt (build_min (TAG_DEFN
, enumtype
));
12358 /* If this is a forward declaration, there should not be any variants,
12359 though we can get a variant in the middle of an enum-specifier with
12360 wacky code like 'enum E { e = sizeof(const E*) };' */
12361 gcc_assert (enumtype
== TYPE_MAIN_VARIANT (enumtype
)
12362 && (TYPE_VALUES (enumtype
)
12363 || !TYPE_NEXT_VARIANT (enumtype
)));
12366 /* Build and install a CONST_DECL for an enumeration constant of the
12367 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12368 LOC is the location of NAME.
12369 Assignment of sequential values by default is handled here. */
12372 build_enumerator (tree name
, tree value
, tree enumtype
, location_t loc
)
12378 /* If the VALUE was erroneous, pretend it wasn't there; that will
12379 result in the enum being assigned the next value in sequence. */
12380 if (value
== error_mark_node
)
12383 /* Remove no-op casts from the value. */
12385 STRIP_TYPE_NOPS (value
);
12387 if (! processing_template_decl
)
12389 /* Validate and default VALUE. */
12390 if (value
!= NULL_TREE
)
12392 value
= cxx_constant_value (value
);
12394 if (TREE_CODE (value
) != INTEGER_CST
12395 || ! INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value
)))
12397 error ("enumerator value for %qD is not an integer constant",
12403 /* Default based on previous value. */
12404 if (value
== NULL_TREE
)
12406 if (TYPE_VALUES (enumtype
))
12409 unsigned HOST_WIDE_INT lo
;
12413 /* C++03 7.2/4: If no initializer is specified for the first
12414 enumerator, the type is an unspecified integral
12415 type. Otherwise the type is the same as the type of the
12416 initializing value of the preceding enumerator unless the
12417 incremented value is not representable in that type, in
12418 which case the type is an unspecified integral type
12419 sufficient to contain the incremented value. */
12420 prev_value
= DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype
)));
12421 if (error_operand_p (prev_value
))
12422 value
= error_mark_node
;
12425 overflowed
= add_double (TREE_INT_CST_LOW (prev_value
),
12426 TREE_INT_CST_HIGH (prev_value
),
12431 tree type
= TREE_TYPE (prev_value
);
12432 bool pos
= (TYPE_UNSIGNED (type
) || hi
>= 0);
12433 di
.low
= lo
; di
.high
= hi
;
12434 if (!double_int_fits_to_tree_p (type
, di
))
12437 for (itk
= itk_int
; itk
!= itk_none
; itk
++)
12439 type
= integer_types
[itk
];
12440 if (type
!= NULL_TREE
12441 && (pos
|| !TYPE_UNSIGNED (type
))
12442 && double_int_fits_to_tree_p (type
, di
))
12445 if (type
&& cxx_dialect
< cxx0x
12446 && itk
> itk_unsigned_long
)
12447 pedwarn (input_location
, OPT_Wlong_long
, pos
? "\
12448 incremented enumerator value is too large for %<unsigned long%>" : "\
12449 incremented enumerator value is too large for %<long%>");
12451 if (type
== NULL_TREE
)
12454 value
= double_int_to_tree (type
, di
);
12459 error ("overflow in enumeration values at %qD", name
);
12460 value
= error_mark_node
;
12465 value
= integer_zero_node
;
12468 /* Remove no-op casts from the value. */
12469 STRIP_TYPE_NOPS (value
);
12471 /* If the underlying type of the enum is fixed, check whether
12472 the enumerator values fits in the underlying type. If it
12473 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12474 if (ENUM_UNDERLYING_TYPE (enumtype
)
12476 && TREE_CODE (value
) == INTEGER_CST
12477 && !int_fits_type_p (value
, ENUM_UNDERLYING_TYPE (enumtype
)))
12479 error ("enumerator value %E is too large for underlying type %<%T%>",
12480 value
, ENUM_UNDERLYING_TYPE (enumtype
));
12482 /* Silently convert the value so that we can continue. */
12483 value
= perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype
),
12488 /* C++ associates enums with global, function, or class declarations. */
12489 context
= current_scope ();
12491 /* Build the actual enumeration constant. Note that the enumeration
12492 constants have the underlying type of the enum (if it is fixed)
12493 or the type of their initializer (if the underlying type of the
12494 enum is not fixed):
12498 If the underlying type is fixed, the type of each enumerator
12499 prior to the closing brace is the underlying type; if the
12500 initializing value of an enumerator cannot be represented by
12501 the underlying type, the program is ill-formed. If the
12502 underlying type is not fixed, the type of each enumerator is
12503 the type of its initializing value.
12505 If the underlying type is not fixed, it will be computed by
12506 finish_enum and we will reset the type of this enumerator. Of
12507 course, if we're processing a template, there may be no value. */
12508 type
= value
? TREE_TYPE (value
) : NULL_TREE
;
12510 if (context
&& context
== current_class_type
)
12511 /* This enum declaration is local to the class. We need the full
12512 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12513 decl
= build_lang_decl_loc (loc
, CONST_DECL
, name
, type
);
12515 /* It's a global enum, or it's local to a function. (Note local to
12516 a function could mean local to a class method. */
12517 decl
= build_decl (loc
, CONST_DECL
, name
, type
);
12519 DECL_CONTEXT (decl
) = FROB_CONTEXT (context
);
12520 TREE_CONSTANT (decl
) = 1;
12521 TREE_READONLY (decl
) = 1;
12522 DECL_INITIAL (decl
) = value
;
12524 if (context
&& context
== current_class_type
&& !SCOPED_ENUM_P (enumtype
))
12525 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12526 on the TYPE_FIELDS list for `S'. (That's so that you can say
12527 things like `S::i' later.) */
12528 finish_member_declaration (decl
);
12532 /* Add this enumeration constant to the list for this type. */
12533 TYPE_VALUES (enumtype
) = tree_cons (name
, decl
, TYPE_VALUES (enumtype
));
12536 /* Look for an enumerator with the given NAME within the enumeration
12537 type ENUMTYPE. This routine is used primarily for qualified name
12538 lookup into an enumerator in C++0x, e.g.,
12540 enum class Color { Red, Green, Blue };
12542 Color color = Color::Red;
12544 Returns the value corresponding to the enumerator, or
12545 NULL_TREE if no such enumerator was found. */
12547 lookup_enumerator (tree enumtype
, tree name
)
12550 gcc_assert (enumtype
&& TREE_CODE (enumtype
) == ENUMERAL_TYPE
);
12552 e
= purpose_member (name
, TYPE_VALUES (enumtype
));
12553 return e
? TREE_VALUE (e
) : NULL_TREE
;
12557 /* We're defining DECL. Make sure that its type is OK. */
12560 check_function_type (tree decl
, tree current_function_parms
)
12562 tree fntype
= TREE_TYPE (decl
);
12563 tree return_type
= complete_type (TREE_TYPE (fntype
));
12565 /* In a function definition, arg types must be complete. */
12566 require_complete_types_for_parms (current_function_parms
);
12568 if (dependent_type_p (return_type
))
12570 if (!COMPLETE_OR_VOID_TYPE_P (return_type
)
12571 || (TYPE_FOR_JAVA (return_type
) && MAYBE_CLASS_TYPE_P (return_type
)))
12573 tree args
= TYPE_ARG_TYPES (fntype
);
12575 if (!COMPLETE_OR_VOID_TYPE_P (return_type
))
12576 error ("return type %q#T is incomplete", return_type
);
12578 error ("return type has Java class type %q#T", return_type
);
12580 /* Make it return void instead. */
12581 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12582 fntype
= build_method_type_directly (TREE_TYPE (TREE_VALUE (args
)),
12584 TREE_CHAIN (args
));
12586 fntype
= build_function_type (void_type_node
, args
);
12588 = build_exception_variant (fntype
,
12589 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl
)));
12590 fntype
= (cp_build_type_attribute_variant
12591 (fntype
, TYPE_ATTRIBUTES (TREE_TYPE (decl
))));
12592 TREE_TYPE (decl
) = fntype
;
12595 abstract_virtuals_error (decl
, TREE_TYPE (fntype
));
12598 /* Create the FUNCTION_DECL for a function definition.
12599 DECLSPECS and DECLARATOR are the parts of the declaration;
12600 they describe the function's name and the type it returns,
12601 but twisted together in a fashion that parallels the syntax of C.
12603 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12604 DECLARATOR is really the DECL for the function we are about to
12605 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12606 indicating that the function is an inline defined in-class.
12608 This function creates a binding context for the function body
12609 as well as setting up the FUNCTION_DECL in current_function_decl.
12611 For C++, we must first check whether that datum makes any sense.
12612 For example, "class A local_a(1,2);" means that variable local_a
12613 is an aggregate of type A, which should have a constructor
12614 applied to it with the argument list [1, 2].
12616 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12617 or may be a BLOCK if the function has been defined previously
12618 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12619 error_mark_node if the function has never been defined, or
12620 a BLOCK if the function has been defined somewhere. */
12623 start_preparsed_function (tree decl1
, tree attrs
, int flags
)
12625 tree ctype
= NULL_TREE
;
12628 int doing_friend
= 0;
12629 cp_binding_level
*bl
;
12630 tree current_function_parms
;
12631 struct c_fileinfo
*finfo
12632 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1
)));
12633 bool honor_interface
;
12635 /* Sanity check. */
12636 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node
)) == VOID_TYPE
);
12637 gcc_assert (TREE_CHAIN (void_list_node
) == NULL_TREE
);
12639 fntype
= TREE_TYPE (decl1
);
12640 if (TREE_CODE (fntype
) == METHOD_TYPE
)
12641 ctype
= TYPE_METHOD_BASETYPE (fntype
);
12643 /* ISO C++ 11.4/5. A friend function defined in a class is in
12644 the (lexical) scope of the class in which it is defined. */
12645 if (!ctype
&& DECL_FRIEND_P (decl1
))
12647 ctype
= DECL_FRIEND_CONTEXT (decl1
);
12649 /* CTYPE could be null here if we're dealing with a template;
12650 for example, `inline friend float foo()' inside a template
12651 will have no CTYPE set. */
12652 if (ctype
&& TREE_CODE (ctype
) != RECORD_TYPE
)
12658 if (DECL_DECLARED_INLINE_P (decl1
)
12659 && lookup_attribute ("noinline", attrs
))
12660 warning (0, "inline function %q+D given attribute noinline", decl1
);
12662 /* Handle gnu_inline attribute. */
12663 if (GNU_INLINE_P (decl1
))
12665 DECL_EXTERNAL (decl1
) = 1;
12666 DECL_NOT_REALLY_EXTERN (decl1
) = 0;
12667 DECL_INTERFACE_KNOWN (decl1
) = 1;
12668 DECL_DISREGARD_INLINE_LIMITS (decl1
) = 1;
12671 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1
))
12672 /* This is a constructor, we must ensure that any default args
12673 introduced by this definition are propagated to the clones
12674 now. The clones are used directly in overload resolution. */
12675 adjust_clone_args (decl1
);
12677 /* Sometimes we don't notice that a function is a static member, and
12678 build a METHOD_TYPE for it. Fix that up now. */
12679 gcc_assert (!(ctype
!= NULL_TREE
&& DECL_STATIC_FUNCTION_P (decl1
)
12680 && TREE_CODE (TREE_TYPE (decl1
)) == METHOD_TYPE
));
12682 /* Set up current_class_type, and enter the scope of the class, if
12685 push_nested_class (ctype
);
12686 else if (DECL_STATIC_FUNCTION_P (decl1
))
12687 push_nested_class (DECL_CONTEXT (decl1
));
12689 /* Now that we have entered the scope of the class, we must restore
12690 the bindings for any template parameters surrounding DECL1, if it
12691 is an inline member template. (Order is important; consider the
12692 case where a template parameter has the same name as a field of
12693 the class.) It is not until after this point that
12694 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12695 if (flags
& SF_INCLASS_INLINE
)
12696 maybe_begin_member_template_processing (decl1
);
12698 /* Effective C++ rule 15. */
12700 && DECL_OVERLOADED_OPERATOR_P (decl1
) == NOP_EXPR
12701 && TREE_CODE (TREE_TYPE (fntype
)) == VOID_TYPE
)
12702 warning (OPT_Weffc__
, "%<operator=%> should return a reference to %<*this%>");
12704 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12705 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12706 if (!DECL_INITIAL (decl1
))
12707 DECL_INITIAL (decl1
) = error_mark_node
;
12709 /* This function exists in static storage.
12710 (This does not mean `static' in the C sense!) */
12711 TREE_STATIC (decl1
) = 1;
12713 /* We must call push_template_decl after current_class_type is set
12714 up. (If we are processing inline definitions after exiting a
12715 class scope, current_class_type will be NULL_TREE until set above
12716 by push_nested_class.) */
12717 if (processing_template_decl
)
12719 /* FIXME: Handle error_mark_node more gracefully. */
12720 tree newdecl1
= push_template_decl (decl1
);
12721 if (newdecl1
!= error_mark_node
)
12725 /* We are now in the scope of the function being defined. */
12726 current_function_decl
= decl1
;
12728 /* Save the parm names or decls from this function's declarator
12729 where store_parm_decls will find them. */
12730 current_function_parms
= DECL_ARGUMENTS (decl1
);
12732 /* Make sure the parameter and return types are reasonable. When
12733 you declare a function, these types can be incomplete, but they
12734 must be complete when you define the function. */
12735 check_function_type (decl1
, current_function_parms
);
12737 /* Build the return declaration for the function. */
12738 restype
= TREE_TYPE (fntype
);
12739 if (DECL_RESULT (decl1
) == NULL_TREE
)
12743 resdecl
= build_decl (input_location
, RESULT_DECL
, 0, restype
);
12744 DECL_ARTIFICIAL (resdecl
) = 1;
12745 DECL_IGNORED_P (resdecl
) = 1;
12746 DECL_RESULT (decl1
) = resdecl
;
12748 cp_apply_type_quals_to_decl (cp_type_quals (restype
), resdecl
);
12751 /* Let the user know we're compiling this function. */
12752 announce_function (decl1
);
12754 /* Record the decl so that the function name is defined.
12755 If we already have a decl for this name, and it is a FUNCTION_DECL,
12756 use the old decl. */
12757 if (!processing_template_decl
&& !(flags
& SF_PRE_PARSED
))
12759 /* A specialization is not used to guide overload resolution. */
12760 if (!DECL_FUNCTION_MEMBER_P (decl1
)
12761 && !(DECL_USE_TEMPLATE (decl1
) &&
12762 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1
))))
12764 tree olddecl
= pushdecl (decl1
);
12766 if (olddecl
== error_mark_node
)
12767 /* If something went wrong when registering the declaration,
12768 use DECL1; we have to have a FUNCTION_DECL to use when
12769 parsing the body of the function. */
12773 /* Otherwise, OLDDECL is either a previous declaration
12774 of the same function or DECL1 itself. */
12776 if (warn_missing_declarations
12777 && olddecl
== decl1
12778 && !DECL_MAIN_P (decl1
)
12779 && TREE_PUBLIC (decl1
)
12780 && !DECL_DECLARED_INLINE_P (decl1
))
12784 /* Check whether DECL1 is in an anonymous
12786 for (context
= DECL_CONTEXT (decl1
);
12788 context
= DECL_CONTEXT (context
))
12790 if (TREE_CODE (context
) == NAMESPACE_DECL
12791 && DECL_NAME (context
) == NULL_TREE
)
12795 if (context
== NULL
)
12796 warning (OPT_Wmissing_declarations
,
12797 "no previous declaration for %q+D", decl1
);
12805 /* We need to set the DECL_CONTEXT. */
12806 if (!DECL_CONTEXT (decl1
) && DECL_TEMPLATE_INFO (decl1
))
12807 DECL_CONTEXT (decl1
) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1
));
12809 fntype
= TREE_TYPE (decl1
);
12811 /* If #pragma weak applies, mark the decl appropriately now.
12812 The pragma only applies to global functions. Because
12813 determining whether or not the #pragma applies involves
12814 computing the mangled name for the declaration, we cannot
12815 apply the pragma until after we have merged this declaration
12816 with any previous declarations; if the original declaration
12817 has a linkage specification, that specification applies to
12818 the definition as well, and may affect the mangled name. */
12819 if (DECL_FILE_SCOPE_P (decl1
))
12820 maybe_apply_pragma_weak (decl1
);
12823 /* Reset this in case the call to pushdecl changed it. */
12824 current_function_decl
= decl1
;
12826 gcc_assert (DECL_INITIAL (decl1
));
12828 /* This function may already have been parsed, in which case just
12829 return; our caller will skip over the body without parsing. */
12830 if (DECL_INITIAL (decl1
) != error_mark_node
)
12833 /* Initialize RTL machinery. We cannot do this until
12834 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12835 even when processing a template; this is how we get
12836 CFUN set up, and our per-function variables initialized.
12837 FIXME factor out the non-RTL stuff. */
12838 bl
= current_binding_level
;
12839 allocate_struct_function (decl1
, processing_template_decl
);
12841 /* Initialize the language data structures. Whenever we start
12842 a new function, we destroy temporaries in the usual way. */
12843 cfun
->language
= ggc_alloc_cleared_language_function ();
12844 current_stmt_tree ()->stmts_are_full_exprs_p
= 1;
12845 current_binding_level
= bl
;
12847 /* Start the statement-tree, start the tree now. */
12848 DECL_SAVED_TREE (decl1
) = push_stmt_list ();
12850 /* If we are (erroneously) defining a function that we have already
12851 defined before, wipe out what we knew before. */
12852 if (!DECL_PENDING_INLINE_P (decl1
))
12853 DECL_SAVED_FUNCTION_DATA (decl1
) = NULL
;
12855 if (ctype
&& !doing_friend
&& !DECL_STATIC_FUNCTION_P (decl1
))
12857 /* We know that this was set up by `grokclassfn'. We do not
12858 wait until `store_parm_decls', since evil parse errors may
12859 never get us to that point. Here we keep the consistency
12860 between `current_class_type' and `current_class_ptr'. */
12861 tree t
= DECL_ARGUMENTS (decl1
);
12863 gcc_assert (t
!= NULL_TREE
&& TREE_CODE (t
) == PARM_DECL
);
12864 gcc_assert (TREE_CODE (TREE_TYPE (t
)) == POINTER_TYPE
);
12866 cp_function_chain
->x_current_class_ref
12867 = cp_build_indirect_ref (t
, RO_NULL
, tf_warning_or_error
);
12868 /* Set this second to avoid shortcut in cp_build_indirect_ref. */
12869 cp_function_chain
->x_current_class_ptr
= t
;
12871 /* Constructors and destructors need to know whether they're "in
12872 charge" of initializing virtual base classes. */
12873 t
= DECL_CHAIN (t
);
12874 if (DECL_HAS_IN_CHARGE_PARM_P (decl1
))
12876 current_in_charge_parm
= t
;
12877 t
= DECL_CHAIN (t
);
12879 if (DECL_HAS_VTT_PARM_P (decl1
))
12881 gcc_assert (DECL_NAME (t
) == vtt_parm_identifier
);
12882 current_vtt_parm
= t
;
12886 honor_interface
= (!DECL_TEMPLATE_INSTANTIATION (decl1
)
12887 /* Implicitly-defined methods (like the
12888 destructor for a class in which no destructor
12889 is explicitly declared) must not be defined
12890 until their definition is needed. So, we
12891 ignore interface specifications for
12892 compiler-generated functions. */
12893 && !DECL_ARTIFICIAL (decl1
));
12895 if (processing_template_decl
)
12896 /* Don't mess with interface flags. */;
12897 else if (DECL_INTERFACE_KNOWN (decl1
))
12899 tree ctx
= decl_function_context (decl1
);
12901 if (DECL_NOT_REALLY_EXTERN (decl1
))
12902 DECL_EXTERNAL (decl1
) = 0;
12904 if (ctx
!= NULL_TREE
&& DECL_DECLARED_INLINE_P (ctx
)
12905 && TREE_PUBLIC (ctx
))
12906 /* This is a function in a local class in an extern inline
12908 comdat_linkage (decl1
);
12910 /* If this function belongs to an interface, it is public.
12911 If it belongs to someone else's interface, it is also external.
12912 This only affects inlines and template instantiations. */
12913 else if (!finfo
->interface_unknown
&& honor_interface
)
12915 if (DECL_DECLARED_INLINE_P (decl1
)
12916 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12918 DECL_EXTERNAL (decl1
)
12919 = (finfo
->interface_only
12920 || (DECL_DECLARED_INLINE_P (decl1
)
12921 && ! flag_implement_inlines
12922 && !DECL_VINDEX (decl1
)));
12924 /* For WIN32 we also want to put these in linkonce sections. */
12925 maybe_make_one_only (decl1
);
12928 DECL_EXTERNAL (decl1
) = 0;
12929 DECL_INTERFACE_KNOWN (decl1
) = 1;
12930 /* If this function is in an interface implemented in this file,
12931 make sure that the back end knows to emit this function
12933 if (!DECL_EXTERNAL (decl1
))
12934 mark_needed (decl1
);
12936 else if (finfo
->interface_unknown
&& finfo
->interface_only
12937 && honor_interface
)
12939 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12940 interface, we will have both finfo->interface_unknown and
12941 finfo->interface_only set. In that case, we don't want to
12942 use the normal heuristics because someone will supply a
12943 #pragma implementation elsewhere, and deducing it here would
12944 produce a conflict. */
12945 comdat_linkage (decl1
);
12946 DECL_EXTERNAL (decl1
) = 0;
12947 DECL_INTERFACE_KNOWN (decl1
) = 1;
12948 DECL_DEFER_OUTPUT (decl1
) = 1;
12952 /* This is a definition, not a reference.
12953 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12954 if (!GNU_INLINE_P (decl1
))
12955 DECL_EXTERNAL (decl1
) = 0;
12957 if ((DECL_DECLARED_INLINE_P (decl1
)
12958 || DECL_TEMPLATE_INSTANTIATION (decl1
))
12959 && ! DECL_INTERFACE_KNOWN (decl1
))
12960 DECL_DEFER_OUTPUT (decl1
) = 1;
12962 DECL_INTERFACE_KNOWN (decl1
) = 1;
12965 /* Determine the ELF visibility attribute for the function. We must not
12966 do this before calling "pushdecl", as we must allow "duplicate_decls"
12967 to merge any attributes appropriately. We also need to wait until
12969 if (!DECL_CLONED_FUNCTION_P (decl1
))
12970 determine_visibility (decl1
);
12972 begin_scope (sk_function_parms
, decl1
);
12976 if (DECL_DESTRUCTOR_P (decl1
)
12977 || (DECL_CONSTRUCTOR_P (decl1
)
12978 && targetm
.cxx
.cdtor_returns_this ()))
12980 cdtor_label
= build_decl (input_location
,
12981 LABEL_DECL
, NULL_TREE
, NULL_TREE
);
12982 DECL_CONTEXT (cdtor_label
) = current_function_decl
;
12985 start_fname_decls ();
12987 store_parm_decls (current_function_parms
);
12991 /* Like start_preparsed_function, except that instead of a
12992 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12994 Returns 1 on success. If the DECLARATOR is not suitable for a function
12995 (it defines a datum instead), we return 0, which tells
12996 yyparse to report a parse error. */
12999 start_function (cp_decl_specifier_seq
*declspecs
,
13000 const cp_declarator
*declarator
,
13005 decl1
= grokdeclarator (declarator
, declspecs
, FUNCDEF
, 1, &attrs
);
13006 if (decl1
== error_mark_node
)
13008 /* If the declarator is not suitable for a function definition,
13009 cause a syntax error. */
13010 if (decl1
== NULL_TREE
|| TREE_CODE (decl1
) != FUNCTION_DECL
)
13012 error ("invalid function declaration");
13016 if (DECL_MAIN_P (decl1
))
13017 /* main must return int. grokfndecl should have corrected it
13018 (and issued a diagnostic) if the user got it wrong. */
13019 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1
)),
13020 integer_type_node
));
13022 start_preparsed_function (decl1
, attrs
, /*flags=*/SF_DEFAULT
);
13027 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
13031 use_eh_spec_block (tree fn
)
13033 return (flag_exceptions
&& flag_enforce_eh_specs
13034 && !processing_template_decl
13035 && !type_throw_all_p (TREE_TYPE (fn
))
13036 /* We insert the EH_SPEC_BLOCK only in the original
13037 function; then, it is copied automatically to the
13039 && !DECL_CLONED_FUNCTION_P (fn
)
13040 /* Implicitly-generated constructors and destructors have
13041 exception specifications. However, those specifications
13042 are the union of the possible exceptions specified by the
13043 constructors/destructors for bases and members, so no
13044 unallowed exception will ever reach this function. By
13045 not creating the EH_SPEC_BLOCK we save a little memory,
13046 and we avoid spurious warnings about unreachable
13048 && !DECL_DEFAULTED_FN (fn
));
13051 /* Store the parameter declarations into the current function declaration.
13052 This is called after parsing the parameter declarations, before
13053 digesting the body of the function.
13055 Also install to binding contour return value identifier, if any. */
13058 store_parm_decls (tree current_function_parms
)
13060 tree fndecl
= current_function_decl
;
13063 /* This is a chain of any other decls that came in among the parm
13064 declarations. If a parm is declared with enum {foo, bar} x;
13065 then CONST_DECLs for foo and bar are put here. */
13066 tree nonparms
= NULL_TREE
;
13068 if (current_function_parms
)
13070 /* This case is when the function was defined with an ANSI prototype.
13071 The parms already have decls, so we need not do anything here
13072 except record them as in effect
13073 and complain if any redundant old-style parm decls were written. */
13075 tree specparms
= current_function_parms
;
13078 /* Must clear this because it might contain TYPE_DECLs declared
13080 current_binding_level
->names
= NULL
;
13082 /* If we're doing semantic analysis, then we'll call pushdecl
13083 for each of these. We must do them in reverse order so that
13084 they end in the correct forward order. */
13085 specparms
= nreverse (specparms
);
13087 for (parm
= specparms
; parm
; parm
= next
)
13089 next
= DECL_CHAIN (parm
);
13090 if (TREE_CODE (parm
) == PARM_DECL
)
13092 if (DECL_NAME (parm
) == NULL_TREE
13093 || TREE_CODE (parm
) != VOID_TYPE
)
13096 error ("parameter %qD declared void", parm
);
13100 /* If we find an enum constant or a type tag,
13101 put it aside for the moment. */
13102 TREE_CHAIN (parm
) = NULL_TREE
;
13103 nonparms
= chainon (nonparms
, parm
);
13107 /* Get the decls in their original chain order and record in the
13108 function. This is all and only the PARM_DECLs that were
13109 pushed into scope by the loop above. */
13110 DECL_ARGUMENTS (fndecl
) = getdecls ();
13113 DECL_ARGUMENTS (fndecl
) = NULL_TREE
;
13115 /* Now store the final chain of decls for the arguments
13116 as the decl-chain of the current lexical scope.
13117 Put the enumerators in as well, at the front so that
13118 DECL_ARGUMENTS is not modified. */
13119 current_binding_level
->names
= chainon (nonparms
, DECL_ARGUMENTS (fndecl
));
13121 if (use_eh_spec_block (current_function_decl
))
13122 current_eh_spec_block
= begin_eh_spec_block ();
13126 /* We have finished doing semantic analysis on DECL, but have not yet
13127 generated RTL for its body. Save away our current state, so that
13128 when we want to generate RTL later we know what to do. */
13131 save_function_data (tree decl
)
13133 struct language_function
*f
;
13135 /* Save the language-specific per-function data so that we can
13136 get it back when we really expand this function. */
13137 gcc_assert (!DECL_PENDING_INLINE_P (decl
));
13140 f
= ggc_alloc_language_function ();
13141 memcpy (f
, cp_function_chain
, sizeof (struct language_function
));
13142 DECL_SAVED_FUNCTION_DATA (decl
) = f
;
13144 /* Clear out the bits we don't need. */
13145 f
->base
.x_stmt_tree
.x_cur_stmt_list
= NULL
;
13146 f
->bindings
= NULL
;
13147 f
->x_local_names
= NULL
;
13148 f
->base
.local_typedefs
= NULL
;
13152 /* Set the return value of the constructor (if present). */
13155 finish_constructor_body (void)
13160 if (targetm
.cxx
.cdtor_returns_this ()
13161 && (! TYPE_FOR_JAVA (current_class_type
)))
13163 /* Any return from a constructor will end up here. */
13164 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13166 val
= DECL_ARGUMENTS (current_function_decl
);
13167 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13168 DECL_RESULT (current_function_decl
), val
);
13169 /* Return the address of the object. */
13170 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13171 add_stmt (exprstmt
);
13175 /* Do all the processing for the beginning of a destructor; set up the
13176 vtable pointers and cleanups for bases and members. */
13179 begin_destructor_body (void)
13181 tree compound_stmt
;
13183 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
13184 issued an error message. We still want to try to process the
13185 body of the function, but initialize_vtbl_ptrs will crash if
13186 TYPE_BINFO is NULL. */
13187 if (COMPLETE_TYPE_P (current_class_type
))
13189 compound_stmt
= begin_compound_stmt (0);
13190 /* Make all virtual function table pointers in non-virtual base
13191 classes point to CURRENT_CLASS_TYPE's virtual function
13193 initialize_vtbl_ptrs (current_class_ptr
);
13194 finish_compound_stmt (compound_stmt
);
13196 /* And insert cleanups for our bases and members so that they
13197 will be properly destroyed if we throw. */
13198 push_base_cleanups ();
13202 /* At the end of every destructor we generate code to delete the object if
13203 necessary. Do that now. */
13206 finish_destructor_body (void)
13210 /* Any return from a destructor will end up here; that way all base
13211 and member cleanups will be run when the function returns. */
13212 add_stmt (build_stmt (input_location
, LABEL_EXPR
, cdtor_label
));
13214 /* In a virtual destructor, we must call delete. */
13215 if (DECL_VIRTUAL_P (current_function_decl
))
13218 tree virtual_size
= cxx_sizeof (current_class_type
);
13222 At the point of definition of a virtual destructor (including
13223 an implicit definition), non-placement operator delete shall
13224 be looked up in the scope of the destructor's class and if
13225 found shall be accessible and unambiguous. */
13226 exprstmt
= build_op_delete_call(DELETE_EXPR
, current_class_ptr
,
13228 /*global_p=*/false,
13229 /*placement=*/NULL_TREE
,
13230 /*alloc_fn=*/NULL_TREE
);
13232 if_stmt
= begin_if_stmt ();
13233 finish_if_stmt_cond (build2 (BIT_AND_EXPR
, integer_type_node
,
13234 current_in_charge_parm
,
13237 finish_expr_stmt (exprstmt
);
13238 finish_then_clause (if_stmt
);
13239 finish_if_stmt (if_stmt
);
13242 if (targetm
.cxx
.cdtor_returns_this ())
13246 val
= DECL_ARGUMENTS (current_function_decl
);
13247 val
= build2 (MODIFY_EXPR
, TREE_TYPE (val
),
13248 DECL_RESULT (current_function_decl
), val
);
13249 /* Return the address of the object. */
13250 exprstmt
= build_stmt (input_location
, RETURN_EXPR
, val
);
13251 add_stmt (exprstmt
);
13255 /* Do the necessary processing for the beginning of a function body, which
13256 in this case includes member-initializers, but not the catch clauses of
13257 a function-try-block. Currently, this means opening a binding level
13258 for the member-initializers (in a ctor), member cleanups (in a dtor),
13259 and capture proxies (in a lambda operator()). */
13262 begin_function_body (void)
13266 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13269 if (processing_template_decl
)
13270 /* Do nothing now. */;
13272 /* Always keep the BLOCK node associated with the outermost pair of
13273 curly braces of a function. These are needed for correct
13274 operation of dwarfout.c. */
13275 keep_next_level (true);
13277 stmt
= begin_compound_stmt (BCS_FN_BODY
);
13279 if (processing_template_decl
)
13280 /* Do nothing now. */;
13281 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13282 begin_destructor_body ();
13287 /* Do the processing for the end of a function body. Currently, this means
13288 closing out the cleanups for fully-constructed bases and members, and in
13289 the case of the destructor, deleting the object if desired. Again, this
13290 is only meaningful for [cd]tors, since they are the only functions where
13291 there is a significant distinction between the main body and any
13292 function catch clauses. Handling, say, main() return semantics here
13293 would be wrong, as flowing off the end of a function catch clause for
13294 main() would also need to return 0. */
13297 finish_function_body (tree compstmt
)
13299 if (compstmt
== NULL_TREE
)
13302 /* Close the block. */
13303 finish_compound_stmt (compstmt
);
13305 if (processing_template_decl
)
13306 /* Do nothing now. */;
13307 else if (DECL_CONSTRUCTOR_P (current_function_decl
))
13308 finish_constructor_body ();
13309 else if (DECL_DESTRUCTOR_P (current_function_decl
))
13310 finish_destructor_body ();
13313 /* Given a function, returns the BLOCK corresponding to the outermost level
13314 of curly braces, skipping the artificial block created for constructor
13318 outer_curly_brace_block (tree fndecl
)
13320 tree block
= BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl
));
13321 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl
))
13322 /* Skip the artificial function body block. */
13323 block
= BLOCK_SUBBLOCKS (block
);
13327 /* If FNDECL is a class's key method, add the class to the list of
13328 keyed classes that should be emitted. */
13331 record_key_method_defined (tree fndecl
)
13333 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl
)
13334 && DECL_VIRTUAL_P (fndecl
)
13335 && !processing_template_decl
)
13337 tree fnclass
= DECL_CONTEXT (fndecl
);
13338 if (fndecl
== CLASSTYPE_KEY_METHOD (fnclass
))
13339 keyed_classes
= tree_cons (NULL_TREE
, fnclass
, keyed_classes
);
13343 /* Subroutine of finish_function.
13344 Save the body of constexpr functions for possible
13345 future compile time evaluation. */
13348 maybe_save_function_definition (tree fun
)
13350 if (!processing_template_decl
13351 && DECL_DECLARED_CONSTEXPR_P (fun
)
13352 && !DECL_CLONED_FUNCTION_P (fun
))
13353 register_constexpr_fundef (fun
, DECL_SAVED_TREE (fun
));
13356 /* Finish up a function declaration and compile that function
13357 all the way to assembler language output. The free the storage
13358 for the function definition.
13360 FLAGS is a bitwise or of the following values:
13362 We just finished processing the body of an in-class inline
13363 function definition. (This processing will have taken place
13364 after the class definition is complete.) */
13367 finish_function (int flags
)
13369 tree fndecl
= current_function_decl
;
13370 tree fntype
, ctype
= NULL_TREE
;
13371 int inclass_inline
= (flags
& 2) != 0;
13373 /* When we get some parse errors, we can end up without a
13374 current_function_decl, so cope. */
13375 if (fndecl
== NULL_TREE
)
13376 return error_mark_node
;
13378 if (c_dialect_objc ())
13379 objc_finish_function ();
13381 gcc_assert (!defer_mark_used_calls
);
13382 defer_mark_used_calls
= true;
13384 record_key_method_defined (fndecl
);
13386 fntype
= TREE_TYPE (fndecl
);
13388 /* TREE_READONLY (fndecl) = 1;
13389 This caused &foo to be of type ptr-to-const-function
13390 which then got a warning when stored in a ptr-to-function variable. */
13392 gcc_assert (building_stmt_list_p ());
13393 /* The current function is being defined, so its DECL_INITIAL should
13394 be set, and unless there's a multiple definition, it should be
13395 error_mark_node. */
13396 gcc_assert (DECL_INITIAL (fndecl
) == error_mark_node
);
13398 /* For a cloned function, we've already got all the code we need;
13399 there's no need to add any extra bits. */
13400 if (!DECL_CLONED_FUNCTION_P (fndecl
))
13402 if (DECL_MAIN_P (current_function_decl
))
13404 /* Make it so that `main' always returns 0 by default (or
13407 finish_return_stmt (integer_one_node
);
13409 finish_return_stmt (integer_zero_node
);
13413 if (use_eh_spec_block (current_function_decl
))
13414 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13415 (TREE_TYPE (current_function_decl
)),
13416 current_eh_spec_block
);
13419 /* If we're saving up tree structure, tie off the function now. */
13420 DECL_SAVED_TREE (fndecl
) = pop_stmt_list (DECL_SAVED_TREE (fndecl
));
13422 finish_fname_decls ();
13424 /* If this function can't throw any exceptions, remember that. */
13425 if (!processing_template_decl
13426 && !cp_function_chain
->can_throw
13427 && !flag_non_call_exceptions
13428 && !decl_replaceable_p (fndecl
))
13429 TREE_NOTHROW (fndecl
) = 1;
13431 /* This must come after expand_function_end because cleanups might
13432 have declarations (from inline functions) that need to go into
13433 this function's blocks. */
13435 /* If the current binding level isn't the outermost binding level
13436 for this function, either there is a bug, or we have experienced
13437 syntax errors and the statement tree is malformed. */
13438 if (current_binding_level
->kind
!= sk_function_parms
)
13440 /* Make sure we have already experienced errors. */
13441 gcc_assert (errorcount
);
13443 /* Throw away the broken statement tree and extra binding
13445 DECL_SAVED_TREE (fndecl
) = alloc_stmt_list ();
13447 while (current_binding_level
->kind
!= sk_function_parms
)
13449 if (current_binding_level
->kind
== sk_class
)
13450 pop_nested_class ();
13452 poplevel (0, 0, 0);
13455 poplevel (1, 0, 1);
13457 /* Statements should always be full-expressions at the outermost set
13458 of curly braces for a function. */
13459 gcc_assert (stmts_are_full_exprs_p ());
13461 /* Save constexpr function body before it gets munged by
13462 the NRV transformation. */
13463 maybe_save_function_definition (fndecl
);
13465 /* Set up the named return value optimization, if we can. Candidate
13466 variables are selected in check_return_expr. */
13467 if (current_function_return_value
)
13469 tree r
= current_function_return_value
;
13472 if (r
!= error_mark_node
13473 /* This is only worth doing for fns that return in memory--and
13474 simpler, since we don't have to worry about promoted modes. */
13475 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl
)), fndecl
)
13476 /* Only allow this for variables declared in the outer scope of
13477 the function so we know that their lifetime always ends with a
13478 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13479 we were to do this optimization in tree-ssa. */
13480 && (outer
= outer_curly_brace_block (fndecl
))
13481 && chain_member (r
, BLOCK_VARS (outer
)))
13482 finalize_nrv (&DECL_SAVED_TREE (fndecl
), r
, DECL_RESULT (fndecl
));
13484 current_function_return_value
= NULL_TREE
;
13487 /* Remember that we were in class scope. */
13488 if (current_class_name
)
13489 ctype
= current_class_type
;
13491 /* Must mark the RESULT_DECL as being in this function. */
13492 DECL_CONTEXT (DECL_RESULT (fndecl
)) = fndecl
;
13494 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13495 to the FUNCTION_DECL node itself. */
13496 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl
)) = fndecl
;
13498 /* Save away current state, if appropriate. */
13499 if (!processing_template_decl
)
13500 save_function_data (fndecl
);
13502 /* Complain if there's just no return statement. */
13503 if (warn_return_type
13504 && TREE_CODE (TREE_TYPE (fntype
)) != VOID_TYPE
13505 && !dependent_type_p (TREE_TYPE (fntype
))
13506 && !current_function_returns_value
&& !current_function_returns_null
13507 /* Don't complain if we abort or throw. */
13508 && !current_function_returns_abnormally
13509 /* Don't complain if we are declared noreturn. */
13510 && !TREE_THIS_VOLATILE (fndecl
)
13511 && !DECL_NAME (DECL_RESULT (fndecl
))
13512 && !TREE_NO_WARNING (fndecl
)
13513 /* Structor return values (if any) are set by the compiler. */
13514 && !DECL_CONSTRUCTOR_P (fndecl
)
13515 && !DECL_DESTRUCTOR_P (fndecl
))
13517 warning (OPT_Wreturn_type
,
13518 "no return statement in function returning non-void");
13519 TREE_NO_WARNING (fndecl
) = 1;
13522 /* Store the end of the function, so that we get good line number
13523 info for the epilogue. */
13524 cfun
->function_end_locus
= input_location
;
13526 /* Complain about parameters that are only set, but never otherwise used. */
13527 if (warn_unused_but_set_parameter
13528 && !processing_template_decl
13529 && errorcount
== unused_but_set_errorcount
13530 && !DECL_CLONED_FUNCTION_P (fndecl
))
13534 for (decl
= DECL_ARGUMENTS (fndecl
);
13536 decl
= DECL_CHAIN (decl
))
13537 if (TREE_USED (decl
)
13538 && TREE_CODE (decl
) == PARM_DECL
13539 && !DECL_READ_P (decl
)
13540 && DECL_NAME (decl
)
13541 && !DECL_ARTIFICIAL (decl
)
13542 && !TREE_NO_WARNING (decl
)
13543 && !DECL_IN_SYSTEM_HEADER (decl
)
13544 && TREE_TYPE (decl
) != error_mark_node
13545 && TREE_CODE (TREE_TYPE (decl
)) != REFERENCE_TYPE
13546 && (!CLASS_TYPE_P (TREE_TYPE (decl
))
13547 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl
))))
13548 warning (OPT_Wunused_but_set_parameter
,
13549 "parameter %q+D set but not used", decl
);
13550 unused_but_set_errorcount
= errorcount
;
13553 /* Complain about locally defined typedefs that are not used in this
13555 maybe_warn_unused_local_typedefs ();
13557 /* Genericize before inlining. */
13558 if (!processing_template_decl
)
13560 struct language_function
*f
= DECL_SAVED_FUNCTION_DATA (fndecl
);
13561 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE
, fndecl
);
13562 cp_genericize (fndecl
);
13563 /* Clear out the bits we don't need. */
13564 f
->x_current_class_ptr
= NULL
;
13565 f
->x_current_class_ref
= NULL
;
13566 f
->x_eh_spec_block
= NULL
;
13567 f
->x_in_charge_parm
= NULL
;
13568 f
->x_vtt_parm
= NULL
;
13569 f
->x_return_value
= NULL
;
13570 f
->bindings
= NULL
;
13571 f
->extern_decl_map
= NULL
;
13573 /* Clear out the bits we don't need. */
13574 local_names
= NULL
;
13576 /* We're leaving the context of this function, so zap cfun. It's still in
13577 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13579 current_function_decl
= NULL
;
13581 /* If this is an in-class inline definition, we may have to pop the
13582 bindings for the template parameters that we added in
13583 maybe_begin_member_template_processing when start_function was
13585 if (inclass_inline
)
13586 maybe_end_member_template_processing ();
13588 /* Leave the scope of the class. */
13590 pop_nested_class ();
13595 current_function_decl
= NULL_TREE
;
13597 defer_mark_used_calls
= false;
13598 if (deferred_mark_used_calls
)
13603 FOR_EACH_VEC_ELT (tree
, deferred_mark_used_calls
, i
, decl
)
13605 VEC_free (tree
, gc
, deferred_mark_used_calls
);
13611 /* Create the FUNCTION_DECL for a function definition.
13612 DECLSPECS and DECLARATOR are the parts of the declaration;
13613 they describe the return type and the name of the function,
13614 but twisted together in a fashion that parallels the syntax of C.
13616 This function creates a binding context for the function body
13617 as well as setting up the FUNCTION_DECL in current_function_decl.
13619 Returns a FUNCTION_DECL on success.
13621 If the DECLARATOR is not suitable for a function (it defines a datum
13622 instead), we return 0, which tells yyparse to report a parse error.
13624 May return void_type_node indicating that this method is actually
13625 a friend. See grokfield for more details.
13627 Came here with a `.pushlevel' .
13629 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13630 CHANGES TO CODE IN `grokfield'. */
13633 grokmethod (cp_decl_specifier_seq
*declspecs
,
13634 const cp_declarator
*declarator
, tree attrlist
)
13636 tree fndecl
= grokdeclarator (declarator
, declspecs
, MEMFUNCDEF
, 0,
13639 if (fndecl
== error_mark_node
)
13640 return error_mark_node
;
13642 if (fndecl
== NULL
|| TREE_CODE (fndecl
) != FUNCTION_DECL
)
13644 error ("invalid member function declaration");
13645 return error_mark_node
;
13649 cplus_decl_attributes (&fndecl
, attrlist
, 0);
13651 /* Pass friends other than inline friend functions back. */
13652 if (fndecl
== void_type_node
)
13655 if (DECL_IN_AGGR_P (fndecl
))
13657 if (DECL_CLASS_SCOPE_P (fndecl
))
13658 error ("%qD is already defined in class %qT", fndecl
,
13659 DECL_CONTEXT (fndecl
));
13660 return error_mark_node
;
13663 check_template_shadow (fndecl
);
13665 DECL_DECLARED_INLINE_P (fndecl
) = 1;
13666 DECL_NO_INLINE_WARNING_P (fndecl
) = 1;
13668 /* We process method specializations in finish_struct_1. */
13669 if (processing_template_decl
&& !DECL_TEMPLATE_SPECIALIZATION (fndecl
))
13671 fndecl
= push_template_decl (fndecl
);
13672 if (fndecl
== error_mark_node
)
13676 if (! DECL_FRIEND_P (fndecl
))
13678 if (DECL_CHAIN (fndecl
))
13680 fndecl
= copy_node (fndecl
);
13681 TREE_CHAIN (fndecl
) = NULL_TREE
;
13685 cp_finish_decl (fndecl
, NULL_TREE
, false, NULL_TREE
, 0);
13687 DECL_IN_AGGR_P (fndecl
) = 1;
13692 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13693 we can lay it out later, when and if its type becomes complete. */
13696 maybe_register_incomplete_var (tree var
)
13698 gcc_assert (TREE_CODE (var
) == VAR_DECL
);
13700 /* Keep track of variables with incomplete types. */
13701 if (!processing_template_decl
&& TREE_TYPE (var
) != error_mark_node
13702 && DECL_EXTERNAL (var
))
13704 tree inner_type
= TREE_TYPE (var
);
13706 while (TREE_CODE (inner_type
) == ARRAY_TYPE
)
13707 inner_type
= TREE_TYPE (inner_type
);
13708 inner_type
= TYPE_MAIN_VARIANT (inner_type
);
13710 if ((!COMPLETE_TYPE_P (inner_type
) && CLASS_TYPE_P (inner_type
))
13711 /* RTTI TD entries are created while defining the type_info. */
13712 || (TYPE_LANG_SPECIFIC (inner_type
)
13713 && TYPE_BEING_DEFINED (inner_type
)))
13716 = VEC_safe_push (incomplete_var
, gc
, incomplete_vars
, NULL
);
13718 iv
->incomplete_type
= inner_type
;
13723 /* Called when a class type (given by TYPE) is defined. If there are
13724 any existing VAR_DECLs whose type has been completed by this
13725 declaration, update them now. */
13728 complete_vars (tree type
)
13731 incomplete_var
*iv
;
13733 for (ix
= 0; VEC_iterate (incomplete_var
, incomplete_vars
, ix
, iv
); )
13735 if (same_type_p (type
, iv
->incomplete_type
))
13737 tree var
= iv
->decl
;
13738 tree type
= TREE_TYPE (var
);
13739 /* Complete the type of the variable. The VAR_DECL itself
13740 will be laid out in expand_expr. */
13741 complete_type (type
);
13742 cp_apply_type_quals_to_decl (cp_type_quals (type
), var
);
13743 /* Remove this entry from the list. */
13744 VEC_unordered_remove (incomplete_var
, incomplete_vars
, ix
);
13750 /* Check for pending declarations which may have abstract type. */
13751 complete_type_check_abstract (type
);
13754 /* If DECL is of a type which needs a cleanup, build and return an
13755 expression to perform that cleanup here. Return NULL_TREE if no
13756 cleanup need be done. */
13759 cxx_maybe_build_cleanup (tree decl
, tsubst_flags_t complain
)
13765 /* Assume no cleanup is required. */
13766 cleanup
= NULL_TREE
;
13768 if (error_operand_p (decl
))
13771 /* Handle "__attribute__((cleanup))". We run the cleanup function
13772 before the destructor since the destructor is what actually
13773 terminates the lifetime of the object. */
13774 attr
= lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl
));
13781 /* Get the name specified by the user for the cleanup function. */
13782 id
= TREE_VALUE (TREE_VALUE (attr
));
13783 /* Look up the name to find the cleanup function to call. It is
13784 important to use lookup_name here because that is what is
13785 used in c-common.c:handle_cleanup_attribute when performing
13786 initial checks on the attribute. Note that those checks
13787 include ensuring that the function found is not an overloaded
13788 function, or an object with an overloaded call operator,
13789 etc.; we can rely on the fact that the function found is an
13790 ordinary FUNCTION_DECL. */
13791 fn
= lookup_name (id
);
13792 arg
= build_address (decl
);
13794 cleanup
= cp_build_function_call_nary (fn
, complain
, arg
, NULL_TREE
);
13795 if (cleanup
== error_mark_node
)
13796 return error_mark_node
;
13798 /* Handle ordinary C++ destructors. */
13799 type
= TREE_TYPE (decl
);
13800 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type
))
13802 int flags
= LOOKUP_NORMAL
|LOOKUP_DESTRUCTOR
;
13803 bool has_vbases
= (TREE_CODE (type
) == RECORD_TYPE
13804 && CLASSTYPE_VBASECLASSES (type
));
13808 if (TREE_CODE (type
) == ARRAY_TYPE
)
13811 addr
= build_address (decl
);
13813 /* Optimize for space over speed here. */
13814 if (!has_vbases
|| flag_expensive_optimizations
)
13815 flags
|= LOOKUP_NONVIRTUAL
;
13817 call
= build_delete (TREE_TYPE (addr
), addr
,
13818 sfk_complete_destructor
, flags
, 0, complain
);
13819 if (call
== error_mark_node
)
13820 cleanup
= error_mark_node
;
13822 cleanup
= cp_build_compound_expr (cleanup
, call
, complain
);
13827 /* build_delete sets the location of the destructor call to the
13828 current location, even though the destructor is going to be
13829 called later, at the end of the current scope. This can lead to
13830 a "jumpy" behaviour for users of debuggers when they step around
13831 the end of the block. So let's unset the location of the
13832 destructor call instead. */
13833 if (cleanup
!= NULL
&& EXPR_P (cleanup
))
13834 SET_EXPR_LOCATION (cleanup
, UNKNOWN_LOCATION
);
13839 /* When a stmt has been parsed, this function is called. */
13846 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13847 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13848 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13851 static_fn_type (tree memfntype
)
13856 if (TYPE_PTRMEMFUNC_P (memfntype
))
13857 memfntype
= TYPE_PTRMEMFUNC_FN_TYPE (memfntype
);
13858 if (POINTER_TYPE_P (memfntype
)
13859 || TREE_CODE (memfntype
) == FUNCTION_DECL
)
13860 memfntype
= TREE_TYPE (memfntype
);
13861 if (TREE_CODE (memfntype
) == FUNCTION_TYPE
)
13863 gcc_assert (TREE_CODE (memfntype
) == METHOD_TYPE
);
13864 args
= TYPE_ARG_TYPES (memfntype
);
13865 fntype
= build_function_type (TREE_TYPE (memfntype
), TREE_CHAIN (args
));
13866 fntype
= apply_memfn_quals (fntype
, type_memfn_quals (memfntype
));
13867 fntype
= (cp_build_type_attribute_variant
13868 (fntype
, TYPE_ATTRIBUTES (memfntype
)));
13869 fntype
= (build_exception_variant
13870 (fntype
, TYPE_RAISES_EXCEPTIONS (memfntype
)));
13874 /* DECL was originally constructed as a non-static member function,
13875 but turned out to be static. Update it accordingly. */
13878 revert_static_member_fn (tree decl
)
13880 tree stype
= static_fn_type (decl
);
13881 cp_cv_quals quals
= type_memfn_quals (stype
);
13883 if (quals
!= TYPE_UNQUALIFIED
)
13884 stype
= apply_memfn_quals (stype
, TYPE_UNQUALIFIED
);
13886 TREE_TYPE (decl
) = stype
;
13888 if (DECL_ARGUMENTS (decl
))
13889 DECL_ARGUMENTS (decl
) = DECL_CHAIN (DECL_ARGUMENTS (decl
));
13890 DECL_STATIC_FUNCTION_P (decl
) = 1;
13893 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13894 one of the language-independent trees. */
13896 enum cp_tree_node_structure_enum
13897 cp_tree_node_structure (union lang_tree_node
* t
)
13899 switch (TREE_CODE (&t
->generic
))
13901 case DEFAULT_ARG
: return TS_CP_DEFAULT_ARG
;
13902 case DEFERRED_NOEXCEPT
: return TS_CP_DEFERRED_NOEXCEPT
;
13903 case IDENTIFIER_NODE
: return TS_CP_IDENTIFIER
;
13904 case OVERLOAD
: return TS_CP_OVERLOAD
;
13905 case TEMPLATE_PARM_INDEX
: return TS_CP_TPI
;
13906 case PTRMEM_CST
: return TS_CP_PTRMEM
;
13907 case BASELINK
: return TS_CP_BASELINK
;
13908 case STATIC_ASSERT
: return TS_CP_STATIC_ASSERT
;
13909 case ARGUMENT_PACK_SELECT
: return TS_CP_ARGUMENT_PACK_SELECT
;
13910 case TRAIT_EXPR
: return TS_CP_TRAIT_EXPR
;
13911 case LAMBDA_EXPR
: return TS_CP_LAMBDA_EXPR
;
13912 case TEMPLATE_INFO
: return TS_CP_TEMPLATE_INFO
;
13913 case USERDEF_LITERAL
: return TS_CP_USERDEF_LITERAL
;
13914 default: return TS_CP_GENERIC
;
13918 /* Build the void_list_node (void_type_node having been created). */
13920 build_void_list_node (void)
13922 tree t
= build_tree_list (NULL_TREE
, void_type_node
);
13927 cp_missing_noreturn_ok_p (tree decl
)
13929 /* A missing noreturn is ok for the `main' function. */
13930 return DECL_MAIN_P (decl
);
13933 /* Return the COMDAT group into which DECL should be placed. */
13936 cxx_comdat_group (tree decl
)
13940 /* Virtual tables, construction virtual tables, and virtual table
13941 tables all go in a single COMDAT group, named after the primary
13943 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_VTABLE_OR_VTT_P (decl
))
13944 name
= DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl
)));
13945 /* For all other DECLs, the COMDAT group is the mangled name of the
13946 declaration itself. */
13949 while (DECL_THUNK_P (decl
))
13951 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13952 into the same section as the target function. In that case
13953 we must return target's name. */
13954 tree target
= THUNK_TARGET (decl
);
13955 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target
)
13956 && DECL_SECTION_NAME (target
) != NULL
13957 && DECL_ONE_ONLY (target
))
13962 name
= DECL_ASSEMBLER_NAME (decl
);
13968 #include "gt-cp-decl.h"