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 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
53 #include "tree-flow.h"
55 static tree grokparms (cp_parameter_declarator *, tree *);
56 static const char *redeclaration_error_message (tree, tree);
58 static int decl_jump_unsafe (tree);
59 static void require_complete_types_for_parms (tree);
60 static int ambi_op_p (enum tree_code);
61 static int unary_op_p (enum tree_code);
62 static void push_local_name (tree);
63 static tree grok_reference_init (tree, tree, tree, tree *);
64 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
66 static void record_unknown_type (tree, const char *);
67 static tree builtin_function_1 (const char *, tree, tree,
68 enum built_in_function code,
69 enum built_in_class cl, const char *,
71 static tree build_library_fn_1 (tree, enum tree_code, tree);
72 static int member_function_or_else (tree, tree, enum overload_flags);
73 static void bad_specifiers (tree, const char *, int, int, int, int,
75 static void check_for_uninitialized_const_var (tree);
76 static hashval_t typename_hash (const void *);
77 static int typename_compare (const void *, const void *);
78 static tree local_variable_p_walkfn (tree *, int *, void *);
79 static tree record_builtin_java_type (const char *, int);
80 static const char *tag_name (enum tag_types);
81 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
82 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
83 static tree make_label_decl (tree, int);
84 static void use_label (tree);
85 static void check_previous_goto_1 (tree, struct cp_binding_level *, tree,
87 static void check_previous_goto (struct named_label_use_list *);
88 static void check_switch_goto (struct cp_binding_level *);
89 static void check_previous_gotos (tree);
90 static void pop_label (tree, tree);
91 static void pop_labels (tree);
92 static void maybe_deduce_size_from_array_init (tree, tree);
93 static void layout_var_decl (tree);
94 static void maybe_commonize_var (tree);
95 static tree check_initializer (tree, tree, int, tree *);
96 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
97 static void save_function_data (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 tree create_array_type_for_decl (tree, tree, tree);
103 static tree get_atexit_node (void);
104 static tree get_dso_handle_node (void);
105 static tree start_cleanup_fn (void);
106 static void end_cleanup_fn (void);
107 static tree cp_make_fname_decl (tree, int);
108 static void initialize_predefined_identifiers (void);
109 static tree check_special_function_return_type
110 (special_function_kind, tree, tree);
111 static tree push_cp_library_fn (enum tree_code, tree);
112 static tree build_cp_library_fn (tree, enum tree_code, tree);
113 static void store_parm_decls (tree);
114 static void initialize_local_var (tree, tree);
115 static void expand_static_init (tree, tree);
116 static tree next_initializable_field (tree);
117 static tree reshape_init (tree, tree *);
119 /* Erroneous argument lists can use this *IFF* they do not modify it. */
120 tree error_mark_list;
122 /* The following symbols are subsumed in the cp_global_trees array, and
123 listed here individually for documentation purposes.
126 tree wchar_decl_node;
128 tree vtable_entry_type;
129 tree delta_type_node;
130 tree __t_desc_type_node;
131 tree ti_desc_type_node;
132 tree bltn_desc_type_node, ptr_desc_type_node;
133 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
134 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
135 tree ptm_desc_type_node;
136 tree base_desc_type_node;
138 tree class_type_node;
139 tree unknown_type_node;
141 Array type `vtable_entry_type[]'
144 tree vtbl_ptr_type_node;
151 A FUNCTION_DECL which can call `abort'. Not necessarily the
152 one that the user will declare, but sufficient to be called
153 by routines that want to abort the program.
157 The FUNCTION_DECL for the default `::operator delete'.
159 tree global_delete_fndecl;
162 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
167 tree cp_global_trees[CPTI_MAX];
169 /* Indicates that there is a type value in some namespace, although
170 that is not necessarily in scope at the moment. */
172 tree global_type_node;
174 /* The node that holds the "name" of the global scope. */
175 tree global_scope_name;
177 /* Used only for jumps to as-yet undefined labels, since jumps to
178 defined labels can have their validity checked immediately. */
180 struct named_label_use_list GTY(())
182 struct cp_binding_level *binding_level;
185 location_t o_goto_locus;
186 struct named_label_use_list *next;
189 #define named_label_uses cp_function_chain->x_named_label_uses
191 #define local_names cp_function_chain->x_local_names
193 /* A list of objects which have constructors or destructors
194 which reside in the global scope. The decl is stored in
195 the TREE_VALUE slot and the initializer is stored
196 in the TREE_PURPOSE slot. */
197 tree static_aggregates;
201 /* A node for the integer constants 2, and 3. */
203 tree integer_two_node, integer_three_node;
205 /* A list of all LABEL_DECLs in the function that have names. Here so
206 we can clear out their names' definitions at the end of the
207 function, and so we can check the validity of jumps to these labels. */
209 struct named_label_list GTY(())
211 struct cp_binding_level *binding_level;
216 struct named_label_list *next;
217 unsigned int in_try_scope : 1;
218 unsigned int in_catch_scope : 1;
221 #define named_labels cp_function_chain->x_named_labels
223 /* The number of function bodies which we are currently processing.
224 (Zero if we are at namespace scope, one inside the body of a
225 function, two inside the body of a function in a local class, etc.) */
228 /* States indicating how grokdeclarator() should handle declspecs marked
229 with __attribute__((deprecated)). An object declared as
230 __attribute__((deprecated)) suppresses warnings of uses of other
233 enum deprecated_states {
238 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
240 /* True if a declaration with an `extern' linkage specifier is being
242 bool have_extern_spec;
245 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
246 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
247 time the VAR_DECL was declared, the type was incomplete. */
249 static GTY(()) tree incomplete_vars;
251 /* Returns the kind of template specialization we are currently
252 processing, given that it's declaration contained N_CLASS_SCOPES
253 explicit scope qualifications. */
256 current_tmpl_spec_kind (int n_class_scopes)
258 int n_template_parm_scopes = 0;
259 int seen_specialization_p = 0;
260 int innermost_specialization_p = 0;
261 struct cp_binding_level *b;
263 /* Scan through the template parameter scopes. */
264 for (b = current_binding_level;
265 b->kind == sk_template_parms;
268 /* If we see a specialization scope inside a parameter scope,
269 then something is wrong. That corresponds to a declaration
272 template <class T> template <> ...
274 which is always invalid since [temp.expl.spec] forbids the
275 specialization of a class member template if the enclosing
276 class templates are not explicitly specialized as well. */
277 if (b->explicit_spec_p)
279 if (n_template_parm_scopes == 0)
280 innermost_specialization_p = 1;
282 seen_specialization_p = 1;
284 else if (seen_specialization_p == 1)
285 return tsk_invalid_member_spec;
287 ++n_template_parm_scopes;
290 /* Handle explicit instantiations. */
291 if (processing_explicit_instantiation)
293 if (n_template_parm_scopes != 0)
294 /* We've seen a template parameter list during an explicit
295 instantiation. For example:
297 template <class T> template void f(int);
299 This is erroneous. */
300 return tsk_invalid_expl_inst;
302 return tsk_expl_inst;
305 if (n_template_parm_scopes < n_class_scopes)
306 /* We've not seen enough template headers to match all the
307 specialized classes present. For example:
309 template <class T> void R<T>::S<T>::f(int);
311 This is invalid; there needs to be one set of template
312 parameters for each class. */
313 return tsk_insufficient_parms;
314 else if (n_template_parm_scopes == n_class_scopes)
315 /* We're processing a non-template declaration (even though it may
316 be a member of a template class.) For example:
318 template <class T> void S<T>::f(int);
320 The `class T' maches the `S<T>', leaving no template headers
321 corresponding to the `f'. */
323 else if (n_template_parm_scopes > n_class_scopes + 1)
324 /* We've got too many template headers. For example:
326 template <> template <class T> void f (T);
328 There need to be more enclosing classes. */
329 return tsk_excessive_parms;
331 /* This must be a template. It's of the form:
333 template <class T> template <class U> void S<T>::f(U);
335 This is a specialization if the innermost level was a
336 specialization; otherwise it's just a definition of the
338 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
341 /* Exit the current scope. */
349 /* When a label goes out of scope, check to see if that label was used
350 in a valid manner, and issue any appropriate warnings or errors. */
353 pop_label (tree label, tree old_value)
355 if (!processing_template_decl)
357 if (DECL_INITIAL (label) == NULL_TREE)
361 cp_error_at ("label %qD used but not defined", label);
362 #ifdef USE_MAPPED_LOCATION
363 location = input_location; /* FIXME want (input_filename, (line)0) */
365 location.file = input_filename;
368 /* Avoid crashing later. */
369 define_label (location, DECL_NAME (label));
371 else if (warn_unused_label && !TREE_USED (label))
372 cp_warning_at ("label %qD defined but not used", label);
375 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
378 /* At the end of a function, all labels declared within the function
379 go out of scope. BLOCK is the top-level block for the
383 pop_labels (tree block)
385 struct named_label_list *link;
387 /* Clear out the definitions of all label names, since their scopes
389 for (link = named_labels; link; link = link->next)
391 pop_label (link->label_decl, link->old_value);
392 /* Put the labels into the "variables" of the top-level block,
393 so debugger can see them. */
394 TREE_CHAIN (link->label_decl) = BLOCK_VARS (block);
395 BLOCK_VARS (block) = link->label_decl;
401 /* The following two routines are used to interface to Objective-C++.
402 The binding level is purposely treated as an opaque type. */
405 objc_get_current_scope (void)
407 return current_binding_level;
410 /* The following routine is used by the NeXT-style SJLJ exceptions;
411 variables get marked 'volatile' so as to not be clobbered by
412 _setjmp()/_longjmp() calls. All variables in the current scope,
413 as well as parent scopes up to (but not including) ENCLOSING_BLK
414 shall be thusly marked. */
417 objc_mark_locals_volatile (void *enclosing_blk)
419 struct cp_binding_level *scope;
421 for (scope = current_binding_level;
422 scope && scope != enclosing_blk && scope->kind == sk_block;
423 scope = scope->level_chain)
427 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
429 if (TREE_CODE (decl) == VAR_DECL)
431 DECL_REGISTER (decl) = 0;
432 TREE_THIS_VOLATILE (decl) = 1;
438 /* Exit a binding level.
439 Pop the level off, and restore the state of the identifier-decl mappings
440 that were in effect when this level was entered.
442 If KEEP == 1, this level had explicit declarations, so
443 and create a "block" (a BLOCK node) for the level
444 to record its declarations and subblocks for symbol table output.
446 If FUNCTIONBODY is nonzero, this level is the body of a function,
447 so create a block as if KEEP were set and also clear out all
450 If REVERSE is nonzero, reverse the order of decls before putting
451 them into the BLOCK. */
454 poplevel (int keep, int reverse, int functionbody)
457 /* The chain of decls was accumulated in reverse order.
458 Put it into forward order, just for cleanliness. */
460 int tmp = functionbody;
461 int real_functionbody;
465 int leaving_for_scope;
468 timevar_push (TV_NAME_LOOKUP);
473 gcc_assert (current_binding_level->kind != sk_class);
475 real_functionbody = (current_binding_level->kind == sk_cleanup
476 ? ((functionbody = 0), tmp) : functionbody);
477 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
479 gcc_assert (!VEC_length(cp_class_binding,
480 current_binding_level->class_shadowed));
482 /* We used to use KEEP == 2 to indicate that the new block should go
483 at the beginning of the list of blocks at this binding level,
484 rather than the end. This hack is no longer used. */
485 gcc_assert (keep == 0 || keep == 1);
487 if (current_binding_level->keep)
490 /* Any uses of undefined labels, and any defined labels, now operate
491 under constraints of next binding contour. */
492 if (cfun && !functionbody)
494 struct cp_binding_level *level_chain;
495 level_chain = current_binding_level->level_chain;
498 struct named_label_use_list *uses;
499 struct named_label_list *labels;
500 for (labels = named_labels; labels; labels = labels->next)
501 if (labels->binding_level == current_binding_level)
504 if (current_binding_level->kind == sk_try)
505 labels->in_try_scope = 1;
506 if (current_binding_level->kind == sk_catch)
507 labels->in_catch_scope = 1;
508 for (decl = labels->names_in_scope; decl;
509 decl = TREE_CHAIN (decl))
510 if (decl_jump_unsafe (decl))
511 labels->bad_decls = tree_cons (NULL_TREE, decl,
513 labels->binding_level = level_chain;
514 labels->names_in_scope = level_chain->names;
517 for (uses = named_label_uses; uses; uses = uses->next)
518 if (uses->binding_level == current_binding_level)
520 uses->binding_level = level_chain;
521 uses->names_in_scope = level_chain->names;
526 /* Get the decls in the order they were written.
527 Usually current_binding_level->names is in reverse order.
528 But parameter decls were previously put in forward order. */
531 current_binding_level->names
532 = decls = nreverse (current_binding_level->names);
534 decls = current_binding_level->names;
536 /* If there were any declarations or structure tags in that level,
537 or if this level is a function body,
538 create a BLOCK to record them for the life of this function. */
540 if (keep == 1 || functionbody)
541 block = make_node (BLOCK);
542 if (block != NULL_TREE)
544 BLOCK_VARS (block) = decls;
545 BLOCK_SUBBLOCKS (block) = subblocks;
548 /* In each subblock, record that this is its superior. */
550 for (link = subblocks; link; link = TREE_CHAIN (link))
551 BLOCK_SUPERCONTEXT (link) = block;
553 /* We still support the old for-scope rules, whereby the variables
554 in a for-init statement were in scope after the for-statement
555 ended. We only use the new rules if flag_new_for_scope is
558 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
560 /* Before we remove the declarations first check for unused variables. */
561 if (warn_unused_variable
562 && !processing_template_decl)
563 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
564 if (TREE_CODE (decl) == VAR_DECL
565 && ! TREE_USED (decl)
566 && ! DECL_IN_SYSTEM_HEADER (decl)
567 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
568 warning ("%Junused variable %qD", decl, decl);
570 /* Remove declarations for all the DECLs in this level. */
571 for (link = decls; link; link = TREE_CHAIN (link))
573 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
576 tree name = DECL_NAME (link);
580 ob = outer_binding (name,
581 IDENTIFIER_BINDING (name),
584 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
586 ns_binding = NULL_TREE;
588 if (ob && ob->scope == current_binding_level->level_chain)
589 /* We have something like:
594 and we are leaving the `for' scope. There's no reason to
595 keep the binding of the inner `i' in this case. */
596 pop_binding (name, link);
597 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
598 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
599 /* Here, we have something like:
607 We must pop the for-scope binding so we know what's a
608 type and what isn't. */
609 pop_binding (name, link);
612 /* Mark this VAR_DECL as dead so that we can tell we left it
613 there only for backward compatibility. */
614 DECL_DEAD_FOR_LOCAL (link) = 1;
616 /* Keep track of what should have happened when we
617 popped the binding. */
619 DECL_SHADOWED_FOR_VAR (link) = ob->value;
621 /* Add it to the list of dead variables in the next
622 outermost binding to that we can remove these when we
623 leave that binding. */
624 current_binding_level->level_chain->dead_vars_from_for
625 = tree_cons (NULL_TREE, link,
626 current_binding_level->level_chain->
629 /* Although we don't pop the cxx_binding, we do clear
630 its SCOPE since the scope is going away now. */
631 IDENTIFIER_BINDING (name)->scope
632 = current_binding_level->level_chain;
639 /* Remove the binding. */
642 if (TREE_CODE (decl) == TREE_LIST)
643 decl = TREE_VALUE (decl);
646 if (TREE_CODE (name) == OVERLOAD)
647 name = OVL_FUNCTION (name);
649 gcc_assert (DECL_P (name));
650 pop_binding (DECL_NAME (name), decl);
654 /* Remove declarations for any `for' variables from inner scopes
655 that we kept around. */
656 for (link = current_binding_level->dead_vars_from_for;
657 link; link = TREE_CHAIN (link))
658 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
660 /* Restore the IDENTIFIER_TYPE_VALUEs. */
661 for (link = current_binding_level->type_shadowed;
662 link; link = TREE_CHAIN (link))
663 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
665 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
666 for (link = current_binding_level->shadowed_labels;
668 link = TREE_CHAIN (link))
669 pop_label (TREE_VALUE (link), TREE_PURPOSE (link));
671 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
672 list if a `using' declaration put them there. The debugging
673 back-ends won't understand OVERLOAD, so we remove them here.
674 Because the BLOCK_VARS are (temporarily) shared with
675 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
676 popped all the bindings. */
681 for (d = &BLOCK_VARS (block); *d; )
683 if (TREE_CODE (*d) == TREE_LIST)
684 *d = TREE_CHAIN (*d);
686 d = &TREE_CHAIN (*d);
690 /* If the level being exited is the top level of a function,
691 check over all the labels. */
694 /* Since this is the top level block of a function, the vars are
695 the function's parameters. Don't leave them in the BLOCK
696 because they are found in the FUNCTION_DECL instead. */
697 BLOCK_VARS (block) = 0;
701 kind = current_binding_level->kind;
702 if (kind == sk_cleanup)
706 /* If this is a temporary binding created for a cleanup, then we'll
707 have pushed a statement list level. Pop that, create a new
708 BIND_EXPR for the block, and insert it into the stream. */
709 stmt = pop_stmt_list (current_binding_level->statement_list);
710 stmt = c_build_bind_expr (block, stmt);
716 DECL_INITIAL (current_function_decl) = block;
718 current_binding_level->blocks
719 = chainon (current_binding_level->blocks, block);
721 /* If we did not make a block for the level just exited,
722 any blocks made for inner levels
723 (since they cannot be recorded as subblocks in that level)
724 must be carried forward so they will later become subblocks
725 of something else. */
727 current_binding_level->blocks
728 = chainon (current_binding_level->blocks, subblocks);
730 /* Each and every BLOCK node created here in `poplevel' is important
731 (e.g. for proper debugging information) so if we created one
732 earlier, mark it as "used". */
734 TREE_USED (block) = 1;
736 /* All temporary bindings created for cleanups are popped silently. */
737 if (kind == sk_cleanup)
740 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
743 /* Insert BLOCK at the end of the list of subblocks of the
744 current binding level. This is used when a BIND_EXPR is expanded,
745 to handle the BLOCK node inside the BIND_EXPR. */
748 insert_block (tree block)
750 TREE_USED (block) = 1;
751 current_binding_level->blocks
752 = chainon (current_binding_level->blocks, block);
755 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
756 itself, calling F for each. The DATA is passed to F as well. */
759 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
762 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
764 result |= (*f) (namespace, data);
766 for (; current; current = TREE_CHAIN (current))
767 result |= walk_namespaces_r (current, f, data);
772 /* Walk all the namespaces, calling F for each. The DATA is passed to
776 walk_namespaces (walk_namespaces_fn f, void* data)
778 return walk_namespaces_r (global_namespace, f, data);
781 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
782 DATA is non-NULL, this is the last time we will call
783 wrapup_global_declarations for this NAMESPACE. */
786 wrapup_globals_for_namespace (tree namespace, void* data)
788 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
789 varray_type statics = level->static_decls;
790 tree *vec = &VARRAY_TREE (statics, 0);
791 int len = VARRAY_ACTIVE_SIZE (statics);
792 int last_time = (data != 0);
796 check_global_declarations (vec, len);
800 /* Write out any globals that need to be output. */
801 return wrapup_global_declarations (vec, len);
805 /* In C++, you don't have to write `struct S' to refer to `S'; you
806 can just use `S'. We accomplish this by creating a TYPE_DECL as
807 if the user had written `typedef struct S S'. Create and return
808 the TYPE_DECL for TYPE. */
811 create_implicit_typedef (tree name, tree type)
815 decl = build_decl (TYPE_DECL, name, type);
816 DECL_ARTIFICIAL (decl) = 1;
817 /* There are other implicit type declarations, like the one *within*
818 a class that allows you to write `S::S'. We must distinguish
820 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
821 TYPE_NAME (type) = decl;
826 /* Remember a local name for name-mangling purposes. */
829 push_local_name (tree decl)
834 timevar_push (TV_NAME_LOOKUP);
836 VARRAY_TREE_INIT (local_names, 8, "local_names");
838 name = DECL_NAME (decl);
840 nelts = VARRAY_ACTIVE_SIZE (local_names);
841 for (i = 0; i < nelts; i++)
843 t = VARRAY_TREE (local_names, i);
844 if (DECL_NAME (t) == name)
846 if (!DECL_LANG_SPECIFIC (decl))
847 retrofit_lang_decl (decl);
848 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
849 if (DECL_LANG_SPECIFIC (t))
850 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
852 DECL_DISCRIMINATOR (decl) = 1;
854 VARRAY_TREE (local_names, i) = decl;
855 timevar_pop (TV_NAME_LOOKUP);
860 VARRAY_PUSH_TREE (local_names, decl);
861 timevar_pop (TV_NAME_LOOKUP);
864 /* Subroutine of duplicate_decls: return truthvalue of whether
865 or not types of these decls match.
867 For C++, we must compare the parameter list so that `int' can match
868 `int&' in a parameter position, but `int&' is not confused with
872 decls_match (tree newdecl, tree olddecl)
876 if (newdecl == olddecl)
879 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
880 /* If the two DECLs are not even the same kind of thing, we're not
881 interested in their types. */
884 if (TREE_CODE (newdecl) == FUNCTION_DECL)
886 tree f1 = TREE_TYPE (newdecl);
887 tree f2 = TREE_TYPE (olddecl);
888 tree p1 = TYPE_ARG_TYPES (f1);
889 tree p2 = TYPE_ARG_TYPES (f2);
891 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
892 && ! (DECL_EXTERN_C_P (newdecl)
893 && DECL_EXTERN_C_P (olddecl)))
896 if (TREE_CODE (f1) != TREE_CODE (f2))
899 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
901 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
902 && (DECL_BUILT_IN (olddecl)
903 #ifndef NO_IMPLICIT_EXTERN_C
904 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
905 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
909 types_match = self_promoting_args_p (p1);
910 if (p1 == void_list_node)
911 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
913 #ifndef NO_IMPLICIT_EXTERN_C
914 else if (p1 == NULL_TREE
915 && (DECL_EXTERN_C_P (olddecl)
916 && DECL_IN_SYSTEM_HEADER (olddecl)
917 && !DECL_CLASS_SCOPE_P (olddecl))
918 && (DECL_EXTERN_C_P (newdecl)
919 && DECL_IN_SYSTEM_HEADER (newdecl)
920 && !DECL_CLASS_SCOPE_P (newdecl)))
922 types_match = self_promoting_args_p (p2);
923 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
927 types_match = compparms (p1, p2);
932 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
934 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
935 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
938 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
939 DECL_TEMPLATE_PARMS (olddecl)))
942 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
943 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
944 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
946 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
947 DECL_TEMPLATE_RESULT (newdecl));
951 /* Need to check scope for variable declaration (VAR_DECL).
952 For typedef (TYPE_DECL), scope is ignored. */
953 if (TREE_CODE (newdecl) == VAR_DECL
954 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
957 if (TREE_TYPE (newdecl) == error_mark_node)
958 types_match = TREE_TYPE (olddecl) == error_mark_node;
959 else if (TREE_TYPE (olddecl) == NULL_TREE)
960 types_match = TREE_TYPE (newdecl) == NULL_TREE;
961 else if (TREE_TYPE (newdecl) == NULL_TREE)
964 types_match = comptypes (TREE_TYPE (newdecl),
966 COMPARE_REDECLARATION);
972 /* If NEWDECL is `static' and an `extern' was seen previously,
973 warn about it. OLDDECL is the previous declaration.
975 Note that this does not apply to the C++ case of declaring
976 a variable `extern const' and then later `const'.
978 Don't complain about built-in functions, since they are beyond
979 the user's control. */
982 warn_extern_redeclared_static (tree newdecl, tree olddecl)
986 if (TREE_CODE (newdecl) == TYPE_DECL
987 || TREE_CODE (newdecl) == TEMPLATE_DECL
988 || TREE_CODE (newdecl) == CONST_DECL
989 || TREE_CODE (newdecl) == NAMESPACE_DECL)
992 /* Don't get confused by static member functions; that's a different
994 if (TREE_CODE (newdecl) == FUNCTION_DECL
995 && DECL_STATIC_FUNCTION_P (newdecl))
998 /* If the old declaration was `static', or the new one isn't, then
999 then everything is OK. */
1000 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1003 /* It's OK to declare a builtin function as `static'. */
1004 if (TREE_CODE (olddecl) == FUNCTION_DECL
1005 && DECL_ARTIFICIAL (olddecl))
1008 name = DECL_ASSEMBLER_NAME (newdecl);
1009 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl);
1010 cp_pedwarn_at ("previous declaration of %qD", olddecl);
1013 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1014 If the redeclaration is invalid, a diagnostic is issued, and the
1015 error_mark_node is returned. Otherwise, OLDDECL is returned.
1017 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1021 duplicate_decls (tree newdecl, tree olddecl)
1023 unsigned olddecl_uid = DECL_UID (olddecl);
1024 int olddecl_friend = 0, types_match = 0;
1025 int new_defines_function = 0;
1027 if (newdecl == olddecl)
1030 types_match = decls_match (newdecl, olddecl);
1032 /* If either the type of the new decl or the type of the old decl is an
1033 error_mark_node, then that implies that we have already issued an
1034 error (earlier) for some bogus type specification, and in that case,
1035 it is rather pointless to harass the user with yet more error message
1036 about the same declaration, so just pretend the types match here. */
1037 if (TREE_TYPE (newdecl) == error_mark_node
1038 || TREE_TYPE (olddecl) == error_mark_node)
1041 if (DECL_P (olddecl)
1042 && TREE_CODE (newdecl) == FUNCTION_DECL
1043 && TREE_CODE (olddecl) == FUNCTION_DECL
1044 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1046 if (DECL_DECLARED_INLINE_P (newdecl)
1047 && DECL_UNINLINABLE (newdecl)
1048 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1049 /* Already warned elsewhere. */;
1050 else if (DECL_DECLARED_INLINE_P (olddecl)
1051 && DECL_UNINLINABLE (olddecl)
1052 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1053 /* Already warned. */;
1054 else if (DECL_DECLARED_INLINE_P (newdecl)
1055 && DECL_UNINLINABLE (olddecl)
1056 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1058 warning ("%Jfunction %qD redeclared as inline", newdecl, newdecl);
1059 warning ("%Jprevious declaration of %qD with attribute noinline",
1062 else if (DECL_DECLARED_INLINE_P (olddecl)
1063 && DECL_UNINLINABLE (newdecl)
1064 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1066 warning ("%Jfunction %qD redeclared with attribute noinline",
1068 warning ("%Jprevious declaration of %qD was inline",
1073 /* Check for redeclaration and other discrepancies. */
1074 if (TREE_CODE (olddecl) == FUNCTION_DECL
1075 && DECL_ARTIFICIAL (olddecl))
1077 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1079 /* Avoid warnings redeclaring anticipated built-ins. */
1080 if (DECL_ANTICIPATED (olddecl))
1083 /* If you declare a built-in or predefined function name as static,
1084 the old definition is overridden, but optionally warn this was a
1085 bad choice of name. */
1086 if (! TREE_PUBLIC (newdecl))
1089 warning ("shadowing %s function %q#D",
1090 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1092 /* Discard the old built-in function. */
1095 /* If the built-in is not ansi, then programs can override
1096 it even globally without an error. */
1097 else if (! DECL_BUILT_IN (olddecl))
1098 warning ("library function %q#D redeclared as non-function %q#D",
1102 error ("declaration of %q#D", newdecl);
1103 error ("conflicts with built-in declaration %q#D",
1108 else if (!types_match)
1110 /* Avoid warnings redeclaring anticipated built-ins. */
1111 if (DECL_ANTICIPATED (olddecl))
1113 /* Deal with fileptr_type_node. FILE type is not known
1114 at the time we create the builtins. */
1117 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1118 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1120 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1123 else if (TREE_VALUE (t2) == fileptr_type_node)
1125 tree t = TREE_VALUE (t1);
1127 if (TREE_CODE (t) == POINTER_TYPE
1128 && TYPE_NAME (TREE_TYPE (t))
1129 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1130 == get_identifier ("FILE")
1131 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1133 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1135 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1136 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1137 types_match = decls_match (newdecl, olddecl);
1139 return duplicate_decls (newdecl, olddecl);
1140 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1143 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1146 else if ((DECL_EXTERN_C_P (newdecl)
1147 && DECL_EXTERN_C_P (olddecl))
1148 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1149 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1151 /* A near match; override the builtin. */
1153 if (TREE_PUBLIC (newdecl))
1155 warning ("new declaration %q#D", newdecl);
1156 warning ("ambiguates built-in declaration %q#D",
1159 else if (warn_shadow)
1160 warning ("shadowing %s function %q#D",
1161 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1165 /* Discard the old built-in function. */
1168 /* Replace the old RTL to avoid problems with inlining. */
1169 COPY_DECL_RTL (newdecl, olddecl);
1171 /* Even if the types match, prefer the new declarations type
1172 for anticipated built-ins, for exception lists, etc... */
1173 else if (DECL_ANTICIPATED (olddecl))
1175 tree type = TREE_TYPE (newdecl);
1176 tree attribs = (*targetm.merge_type_attributes)
1177 (TREE_TYPE (olddecl), type);
1179 type = cp_build_type_attribute_variant (type, attribs);
1180 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1183 /* Whether or not the builtin can throw exceptions has no
1184 bearing on this declarator. */
1185 TREE_NOTHROW (olddecl) = 0;
1187 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1189 /* If a builtin function is redeclared as `static', merge
1190 the declarations, but make the original one static. */
1191 DECL_THIS_STATIC (olddecl) = 1;
1192 TREE_PUBLIC (olddecl) = 0;
1194 /* Make the old declaration consistent with the new one so
1195 that all remnants of the builtin-ness of this function
1196 will be banished. */
1197 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1198 COPY_DECL_RTL (newdecl, olddecl);
1201 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1203 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1204 && TREE_CODE (newdecl) != TYPE_DECL
1205 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1206 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1207 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1208 && TREE_CODE (olddecl) != TYPE_DECL
1209 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1210 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1213 /* We do nothing special here, because C++ does such nasty
1214 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1215 get shadowed, and know that if we need to find a TYPE_DECL
1216 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1217 slot of the identifier. */
1221 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1222 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1223 || (TREE_CODE (olddecl) == FUNCTION_DECL
1224 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1227 error ("%q#D redeclared as different kind of symbol", newdecl);
1228 if (TREE_CODE (olddecl) == TREE_LIST)
1229 olddecl = TREE_VALUE (olddecl);
1230 cp_error_at ("previous declaration of %q#D", olddecl);
1232 return error_mark_node;
1234 else if (!types_match)
1236 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1237 /* These are certainly not duplicate declarations; they're
1238 from different scopes. */
1241 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1243 /* The name of a class template may not be declared to refer to
1244 any other template, class, function, object, namespace, value,
1245 or type in the same scope. */
1246 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1247 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1249 error ("declaration of template %q#D", newdecl);
1250 cp_error_at ("conflicts with previous declaration %q#D",
1253 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1254 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1255 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1256 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1257 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1258 DECL_TEMPLATE_PARMS (olddecl))
1259 /* Template functions can be disambiguated by
1261 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1262 TREE_TYPE (TREE_TYPE (olddecl))))
1264 error ("new declaration %q#D", newdecl);
1265 cp_error_at ("ambiguates old declaration %q#D", olddecl);
1269 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1271 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1273 error ("declaration of C function %q#D conflicts with",
1275 cp_error_at ("previous declaration %q#D here", olddecl);
1277 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1278 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1280 error ("new declaration %q#D", newdecl);
1281 cp_error_at ("ambiguates old declaration %q#D", olddecl);
1288 error ("conflicting declaration %q#D", newdecl);
1289 cp_error_at ("%qD has a previous declaration as %q#D",
1291 return error_mark_node;
1294 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1295 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1296 && (!DECL_TEMPLATE_INFO (newdecl)
1297 || (DECL_TI_TEMPLATE (newdecl)
1298 != DECL_TI_TEMPLATE (olddecl))))
1299 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1300 && (!DECL_TEMPLATE_INFO (olddecl)
1301 || (DECL_TI_TEMPLATE (olddecl)
1302 != DECL_TI_TEMPLATE (newdecl))))))
1303 /* It's OK to have a template specialization and a non-template
1304 with the same type, or to have specializations of two
1305 different templates with the same type. Note that if one is a
1306 specialization, and the other is an instantiation of the same
1307 template, that we do not exit at this point. That situation
1308 can occur if we instantiate a template class, and then
1309 specialize one of its methods. This situation is valid, but
1310 the declarations must be merged in the usual way. */
1312 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1313 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1314 && !DECL_USE_TEMPLATE (newdecl))
1315 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1316 && !DECL_USE_TEMPLATE (olddecl))))
1317 /* One of the declarations is a template instantiation, and the
1318 other is not a template at all. That's OK. */
1320 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1322 /* In [namespace.alias] we have:
1324 In a declarative region, a namespace-alias-definition can be
1325 used to redefine a namespace-alias declared in that declarative
1326 region to refer only to the namespace to which it already
1329 Therefore, if we encounter a second alias directive for the same
1330 alias, we can just ignore the second directive. */
1331 if (DECL_NAMESPACE_ALIAS (newdecl)
1332 && (DECL_NAMESPACE_ALIAS (newdecl)
1333 == DECL_NAMESPACE_ALIAS (olddecl)))
1335 /* [namespace.alias]
1337 A namespace-name or namespace-alias shall not be declared as
1338 the name of any other entity in the same declarative region.
1339 A namespace-name defined at global scope shall not be
1340 declared as the name of any other entity in any global scope
1342 error ("declaration of namespace %qD conflicts with", newdecl);
1343 cp_error_at ("previous declaration of namespace %qD here", olddecl);
1344 return error_mark_node;
1348 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1351 error (errmsg, newdecl);
1352 if (DECL_NAME (olddecl) != NULL_TREE)
1353 cp_error_at ((DECL_INITIAL (olddecl)
1354 && namespace_bindings_p ())
1355 ? "%q#D previously defined here"
1356 : "%q#D previously declared here", olddecl);
1357 return error_mark_node;
1359 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1360 && DECL_INITIAL (olddecl) != NULL_TREE
1361 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1362 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1364 /* Prototype decl follows defn w/o prototype. */
1365 cp_warning_at ("prototype for %q#D", newdecl);
1366 warning ("%Jfollows non-prototype definition here", olddecl);
1368 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1369 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1371 /* extern "C" int foo ();
1372 int foo () { bar (); }
1374 if (current_lang_depth () == 0)
1375 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1378 cp_error_at ("previous declaration of %q#D with %qL linkage",
1379 olddecl, DECL_LANGUAGE (olddecl));
1380 error ("conflicts with new declaration with %qL linkage",
1381 DECL_LANGUAGE (newdecl));
1385 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1387 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1389 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1390 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1393 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1394 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1396 for (; t1 && t1 != void_list_node;
1397 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1398 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1400 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1403 pedwarn ("default argument given for parameter %d of %q#D",
1405 cp_pedwarn_at ("after previous specification in %q#D",
1410 error ("default argument given for parameter %d of %q#D",
1412 cp_error_at ("after previous specification in %q#D",
1417 if (DECL_DECLARED_INLINE_P (newdecl)
1418 && ! DECL_DECLARED_INLINE_P (olddecl)
1419 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1421 warning ("%q#D was used before it was declared inline", newdecl);
1422 warning ("%Jprevious non-inline declaration here", olddecl);
1427 /* Do not merge an implicit typedef with an explicit one. In:
1431 typedef class A A __attribute__ ((foo));
1433 the attribute should apply only to the typedef. */
1434 if (TREE_CODE (olddecl) == TYPE_DECL
1435 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1436 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1439 /* If new decl is `static' and an `extern' was seen previously,
1441 warn_extern_redeclared_static (newdecl, olddecl);
1443 /* We have committed to returning 1 at this point. */
1444 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1446 /* Now that functions must hold information normally held
1447 by field decls, there is extra work to do so that
1448 declaration information does not get destroyed during
1450 if (DECL_VINDEX (olddecl))
1451 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1452 if (DECL_CONTEXT (olddecl))
1453 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1454 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1455 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1456 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1457 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1458 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1459 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1460 SET_OVERLOADED_OPERATOR_CODE
1461 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1462 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1464 /* Optionally warn about more than one declaration for the same
1465 name, but don't warn about a function declaration followed by a
1467 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1468 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1469 /* Don't warn about extern decl followed by definition. */
1470 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1471 /* Don't warn about friends, let add_friend take care of it. */
1472 && ! (DECL_FRIEND_P (newdecl) || DECL_FRIEND_P (olddecl)))
1474 warning ("redundant redeclaration of %qD in same scope", newdecl);
1475 cp_warning_at ("previous declaration of %qD", olddecl);
1479 /* Deal with C++: must preserve virtual function table size. */
1480 if (TREE_CODE (olddecl) == TYPE_DECL)
1482 tree newtype = TREE_TYPE (newdecl);
1483 tree oldtype = TREE_TYPE (olddecl);
1485 if (newtype != error_mark_node && oldtype != error_mark_node
1486 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1487 CLASSTYPE_FRIEND_CLASSES (newtype)
1488 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1490 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1493 /* Copy all the DECL_... slots specified in the new decl
1494 except for any that we copy here from the old type. */
1495 DECL_ATTRIBUTES (newdecl)
1496 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1498 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1500 TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
1501 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1502 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1503 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1505 /* If the new declaration is a definition, update the file and
1506 line information on the declaration. */
1507 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)) == NULL_TREE
1508 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl)) != NULL_TREE)
1510 DECL_SOURCE_LOCATION (olddecl)
1511 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl))
1512 = DECL_SOURCE_LOCATION (newdecl);
1513 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1514 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl))
1515 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl));
1518 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1520 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl))
1521 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl));
1522 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl))
1523 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl));
1531 /* Automatically handles default parameters. */
1532 tree oldtype = TREE_TYPE (olddecl);
1535 /* Merge the data types specified in the two decls. */
1536 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1538 /* If merge_types produces a non-typedef type, just use the old type. */
1539 if (TREE_CODE (newdecl) == TYPE_DECL
1540 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1543 if (TREE_CODE (newdecl) == VAR_DECL)
1545 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1546 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1547 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1548 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1551 /* Do this after calling `merge_types' so that default
1552 parameters don't confuse us. */
1553 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1554 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
1555 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
1557 TREE_TYPE (newdecl) = build_exception_variant (newtype,
1558 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
1559 TREE_TYPE (olddecl) = build_exception_variant (newtype,
1560 TYPE_RAISES_EXCEPTIONS (oldtype));
1562 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
1563 && ! DECL_IS_BUILTIN (olddecl)
1565 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
1566 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
1568 error ("declaration of %qF throws different exceptions",
1570 cp_error_at ("than previous declaration %qF", olddecl);
1573 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1575 /* Lay the type out, unless already done. */
1576 if (! same_type_p (newtype, oldtype)
1577 && TREE_TYPE (newdecl) != error_mark_node
1578 && !(processing_template_decl && uses_template_parms (newdecl)))
1579 layout_type (TREE_TYPE (newdecl));
1581 if ((TREE_CODE (newdecl) == VAR_DECL
1582 || TREE_CODE (newdecl) == PARM_DECL
1583 || TREE_CODE (newdecl) == RESULT_DECL
1584 || TREE_CODE (newdecl) == FIELD_DECL
1585 || TREE_CODE (newdecl) == TYPE_DECL)
1586 && !(processing_template_decl && uses_template_parms (newdecl)))
1587 layout_decl (newdecl, 0);
1589 /* Merge the type qualifiers. */
1590 if (TREE_READONLY (newdecl))
1591 TREE_READONLY (olddecl) = 1;
1592 if (TREE_THIS_VOLATILE (newdecl))
1593 TREE_THIS_VOLATILE (olddecl) = 1;
1594 if (TREE_NOTHROW (newdecl))
1595 TREE_NOTHROW (olddecl) = 1;
1597 /* Merge deprecatedness. */
1598 if (TREE_DEPRECATED (newdecl))
1599 TREE_DEPRECATED (olddecl) = 1;
1601 /* Merge the initialization information. */
1602 if (DECL_INITIAL (newdecl) == NULL_TREE
1603 && DECL_INITIAL (olddecl) != NULL_TREE)
1605 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1606 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1607 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1608 && DECL_LANG_SPECIFIC (newdecl)
1609 && DECL_LANG_SPECIFIC (olddecl))
1611 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1612 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1616 /* Merge the section attribute.
1617 We want to issue an error if the sections conflict but that must be
1618 done later in decl_attributes since we are called before attributes
1620 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1621 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1623 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1625 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1626 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1627 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1628 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1629 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1630 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1631 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1632 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1633 /* Keep the old RTL. */
1634 COPY_DECL_RTL (olddecl, newdecl);
1636 else if (TREE_CODE (newdecl) == VAR_DECL
1637 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1639 /* Keep the old RTL. We cannot keep the old RTL if the old
1640 declaration was for an incomplete object and the new
1641 declaration is not since many attributes of the RTL will
1643 COPY_DECL_RTL (olddecl, newdecl);
1646 /* If cannot merge, then use the new type and qualifiers,
1647 and don't preserve the old rtl. */
1650 /* Clean out any memory we had of the old declaration. */
1651 tree oldstatic = value_member (olddecl, static_aggregates);
1653 TREE_VALUE (oldstatic) = error_mark_node;
1655 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1656 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1657 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1658 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1661 /* Merge the storage class information. */
1662 merge_weak (newdecl, olddecl);
1664 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1665 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1666 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1667 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1668 if (! DECL_EXTERNAL (olddecl))
1669 DECL_EXTERNAL (newdecl) = 0;
1671 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1673 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1674 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1675 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1676 DECL_TEMPLATE_INSTANTIATED (newdecl)
1677 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1678 /* If the OLDDECL is an implicit instantiation, then the NEWDECL
1679 must be too. But, it may not yet be marked as such if the
1680 caller has created NEWDECL, but has not yet figured out that
1681 it is a redeclaration. */
1682 if (DECL_IMPLICIT_INSTANTIATION (olddecl)
1683 && !DECL_USE_TEMPLATE (newdecl))
1684 SET_DECL_IMPLICIT_INSTANTIATION (newdecl);
1685 /* Don't really know how much of the language-specific
1686 values we should copy from old to new. */
1687 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1688 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1689 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1690 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1691 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1692 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1693 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1694 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1695 olddecl_friend = DECL_FRIEND_P (olddecl);
1697 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1698 if (TREE_CODE (newdecl) == FUNCTION_DECL
1699 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1701 DECL_BEFRIENDING_CLASSES (newdecl)
1702 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1703 DECL_BEFRIENDING_CLASSES (olddecl));
1704 /* DECL_THUNKS is only valid for virtual functions,
1705 otherwise it is a DECL_FRIEND_CONTEXT. */
1706 if (DECL_VIRTUAL_P (newdecl))
1707 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1711 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1713 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1714 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1716 /* If newdecl is not a specialization, then it is not a
1717 template-related function at all. And that means that we
1718 should have exited above, returning 0. */
1719 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1721 if (TREE_USED (olddecl))
1722 /* From [temp.expl.spec]:
1724 If a template, a member template or the member of a class
1725 template is explicitly specialized then that
1726 specialization shall be declared before the first use of
1727 that specialization that would cause an implicit
1728 instantiation to take place, in every translation unit in
1729 which such a use occurs. */
1730 error ("explicit specialization of %qD after first use",
1733 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1735 /* [temp.expl.spec/14] We don't inline explicit specialization
1736 just because the primary template says so. */
1740 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1741 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1743 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1745 /* If either decl says `inline', this fn is inline, unless
1746 its definition was passed already. */
1747 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1748 DECL_INLINE (olddecl) = 1;
1749 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1751 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1752 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1755 /* Preserve abstractness on cloned [cd]tors. */
1756 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1760 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1761 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1762 COPY_DECL_RTL (newdecl, olddecl);
1764 if (! types_match || new_defines_function)
1766 /* These need to be copied so that the names are available.
1767 Note that if the types do match, we'll preserve inline
1768 info and other bits, but if not, we won't. */
1769 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1770 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1772 if (new_defines_function)
1773 /* If defining a function declared with other language
1774 linkage, use the previously declared language linkage. */
1775 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1776 else if (types_match)
1778 /* If redeclaring a builtin function, and not a definition,
1779 it stays built in. */
1780 if (DECL_BUILT_IN (olddecl))
1782 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1783 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1784 /* If we're keeping the built-in definition, keep the rtl,
1785 regardless of declaration matches. */
1786 COPY_DECL_RTL (olddecl, newdecl);
1789 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1790 /* Don't clear out the arguments if we're redefining a function. */
1791 if (DECL_ARGUMENTS (olddecl))
1792 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1795 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1796 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1798 /* Now preserve various other info from the definition. */
1799 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1800 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1801 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1802 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1804 /* Warn about conflicting visibility specifications. */
1805 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1806 && DECL_VISIBILITY_SPECIFIED (newdecl)
1807 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1809 warning ("%J%qD: visibility attribute ignored because it",
1811 warning ("%Jconflicts with previous declaration here", olddecl);
1813 /* Choose the declaration which specified visibility. */
1814 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1816 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1817 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1820 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1821 with that from NEWDECL below. */
1822 if (DECL_LANG_SPECIFIC (olddecl))
1824 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1825 != DECL_LANG_SPECIFIC (newdecl));
1826 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1829 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1833 function_size = sizeof (struct tree_decl);
1835 memcpy ((char *) olddecl + sizeof (struct tree_common),
1836 (char *) newdecl + sizeof (struct tree_common),
1837 function_size - sizeof (struct tree_common));
1839 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
1840 /* If newdecl is a template instantiation, it is possible that
1841 the following sequence of events has occurred:
1843 o A friend function was declared in a class template. The
1844 class template was instantiated.
1846 o The instantiation of the friend declaration was
1847 recorded on the instantiation list, and is newdecl.
1849 o Later, however, instantiate_class_template called pushdecl
1850 on the newdecl to perform name injection. But, pushdecl in
1851 turn called duplicate_decls when it discovered that another
1852 declaration of a global function with the same name already
1855 o Here, in duplicate_decls, we decided to clobber newdecl.
1857 If we're going to do that, we'd better make sure that
1858 olddecl, and not newdecl, is on the list of
1859 instantiations so that if we try to do the instantiation
1860 again we won't get the clobbered declaration. */
1861 reregister_specialization (newdecl,
1862 DECL_TI_TEMPLATE (newdecl),
1867 memcpy ((char *) olddecl + sizeof (struct tree_common),
1868 (char *) newdecl + sizeof (struct tree_common),
1869 sizeof (struct tree_decl) - sizeof (struct tree_common)
1870 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
1873 DECL_UID (olddecl) = olddecl_uid;
1875 DECL_FRIEND_P (olddecl) = 1;
1877 /* NEWDECL contains the merged attribute lists.
1878 Update OLDDECL to be the same. */
1879 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
1881 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
1882 so that encode_section_info has a chance to look at the new decl
1883 flags and attributes. */
1884 if (DECL_RTL_SET_P (olddecl)
1885 && (TREE_CODE (olddecl) == FUNCTION_DECL
1886 || (TREE_CODE (olddecl) == VAR_DECL
1887 && TREE_STATIC (olddecl))))
1888 make_decl_rtl (olddecl);
1890 /* The NEWDECL will no longer be needed. Because every out-of-class
1891 declaration of a member results in a call to duplicate_decls,
1892 freeing these nodes represents in a significant savings. */
1898 /* Return zero if the declaration NEWDECL is valid
1899 when the declaration OLDDECL (assumed to be for the same name)
1900 has already been seen.
1901 Otherwise return an error message format string with a %s
1902 where the identifier should go. */
1905 redeclaration_error_message (tree newdecl, tree olddecl)
1907 if (TREE_CODE (newdecl) == TYPE_DECL)
1909 /* Because C++ can put things into name space for free,
1910 constructs like "typedef struct foo { ... } foo"
1911 would look like an erroneous redeclaration. */
1912 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
1915 return "redefinition of %q#D";
1917 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1919 /* If this is a pure function, its olddecl will actually be
1920 the original initialization to `0' (which we force to call
1921 abort()). Don't complain about redefinition in this case. */
1922 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
1923 && DECL_INITIAL (olddecl) == NULL_TREE)
1926 /* If both functions come from different namespaces, this is not
1927 a redeclaration - this is a conflict with a used function. */
1928 if (DECL_NAMESPACE_SCOPE_P (olddecl)
1929 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
1930 && ! decls_match (olddecl, newdecl))
1931 return "%qD conflicts with used function";
1933 /* We'll complain about linkage mismatches in
1934 warn_extern_redeclared_static. */
1936 /* Defining the same name twice is no good. */
1937 if (DECL_INITIAL (olddecl) != NULL_TREE
1938 && DECL_INITIAL (newdecl) != NULL_TREE)
1940 if (DECL_NAME (olddecl) == NULL_TREE)
1941 return "%q#D not declared in class";
1943 return "redefinition of %q#D";
1947 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1951 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1953 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
1954 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
1955 return "redefinition of %q#D";
1959 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
1960 || (DECL_TEMPLATE_RESULT (newdecl)
1961 == DECL_TEMPLATE_RESULT (olddecl)))
1964 nt = DECL_TEMPLATE_RESULT (newdecl);
1965 if (DECL_TEMPLATE_INFO (nt))
1966 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
1967 ot = DECL_TEMPLATE_RESULT (olddecl);
1968 if (DECL_TEMPLATE_INFO (ot))
1969 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
1970 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
1971 return "redefinition of %q#D";
1975 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
1977 /* Objects declared at top level: */
1978 /* If at least one is a reference, it's ok. */
1979 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
1981 /* Reject two definitions. */
1982 return "redefinition of %q#D";
1986 /* Objects declared with block scope: */
1987 /* Reject two definitions, and reject a definition
1988 together with an external reference. */
1989 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
1990 return "redeclaration of %q#D";
1995 /* Create a new label, named ID. */
1998 make_label_decl (tree id, int local_p)
2002 decl = build_decl (LABEL_DECL, id, void_type_node);
2004 DECL_CONTEXT (decl) = current_function_decl;
2005 DECL_MODE (decl) = VOIDmode;
2006 C_DECLARED_LABEL_FLAG (decl) = local_p;
2008 /* Say where one reference is to the label, for the sake of the
2009 error if it is not defined. */
2010 DECL_SOURCE_LOCATION (decl) = input_location;
2012 /* Record the fact that this identifier is bound to this label. */
2013 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2018 /* Record this label on the list of used labels so that we can check
2019 at the end of the function to see whether or not the label was
2020 actually defined, and so we can check when the label is defined whether
2021 this use is valid. */
2024 use_label (tree decl)
2026 if (named_label_uses == NULL
2027 || named_label_uses->names_in_scope != current_binding_level->names
2028 || named_label_uses->label_decl != decl)
2030 struct named_label_use_list *new_ent;
2031 new_ent = GGC_NEW (struct named_label_use_list);
2032 new_ent->label_decl = decl;
2033 new_ent->names_in_scope = current_binding_level->names;
2034 new_ent->binding_level = current_binding_level;
2035 new_ent->o_goto_locus = input_location;
2036 new_ent->next = named_label_uses;
2037 named_label_uses = new_ent;
2041 /* Look for a label named ID in the current function. If one cannot
2042 be found, create one. (We keep track of used, but undefined,
2043 labels, and complain about them at the end of a function.) */
2046 lookup_label (tree id)
2049 struct named_label_list *ent;
2051 timevar_push (TV_NAME_LOOKUP);
2052 /* You can't use labels at global scope. */
2053 if (current_function_decl == NULL_TREE)
2055 error ("label %qE referenced outside of any function", id);
2056 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2059 /* See if we've already got this label. */
2060 decl = IDENTIFIER_LABEL_VALUE (id);
2061 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2062 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2064 /* Record this label on the list of labels used in this function.
2065 We do this before calling make_label_decl so that we get the
2066 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2067 ent = GGC_CNEW (struct named_label_list);
2068 ent->old_value = IDENTIFIER_LABEL_VALUE (id);
2069 ent->next = named_labels;
2072 /* We need a new label. */
2073 decl = make_label_decl (id, /*local_p=*/0);
2075 /* Now fill in the information we didn't have before. */
2076 ent->label_decl = decl;
2078 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2081 /* Declare a local label named ID. */
2084 declare_local_label (tree id)
2088 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2089 this scope we can restore the old value of
2090 IDENTIFIER_TYPE_VALUE. */
2091 current_binding_level->shadowed_labels
2092 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2093 current_binding_level->shadowed_labels);
2094 /* Look for the label. */
2095 decl = make_label_decl (id, /*local_p=*/1);
2096 /* Now fill in the information we didn't have before. */
2097 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
2102 /* Returns nonzero if it is ill-formed to jump past the declaration of
2103 DECL. Returns 2 if it's also a real problem. */
2106 decl_jump_unsafe (tree decl)
2108 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))
2111 if (DECL_INITIAL (decl) == NULL_TREE
2112 && pod_type_p (TREE_TYPE (decl)))
2115 /* This is really only important if we're crossing an initialization.
2116 The POD stuff is just pedantry; why should it matter if the class
2117 contains a field of pointer to member type? */
2118 if (DECL_INITIAL (decl)
2119 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))))
2124 /* Check that a single previously seen jump to a newly defined label
2125 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2126 the jump context; NAMES are the names in scope in LEVEL at the jump
2127 context; FILE and LINE are the source position of the jump or 0. */
2130 check_previous_goto_1 (tree decl,
2131 struct cp_binding_level* level,
2132 tree names, const location_t *locus)
2136 struct cp_binding_level *b = current_binding_level;
2137 for (; b; b = b->level_chain)
2139 tree new_decls = b->names;
2140 tree old_decls = (b == level ? names : NULL_TREE);
2141 for (; new_decls != old_decls;
2142 new_decls = TREE_CHAIN (new_decls))
2144 int problem = decl_jump_unsafe (new_decls);
2151 pedwarn ("jump to label %qD", decl);
2153 pedwarn ("jump to case label");
2156 pedwarn ("%H from here", locus);
2161 cp_error_at (" crosses initialization of %q#D",
2164 cp_pedwarn_at (" enters scope of non-POD %q#D",
2170 if ((b->kind == sk_try || b->kind == sk_catch) && ! saw_eh)
2175 pedwarn ("jump to label %qD", decl);
2177 pedwarn ("jump to case label");
2180 pedwarn ("%H from here", locus);
2183 if (b->kind == sk_try)
2184 error (" enters try block");
2186 error (" enters catch block");
2193 check_previous_goto (struct named_label_use_list* use)
2195 check_previous_goto_1 (use->label_decl, use->binding_level,
2196 use->names_in_scope, &use->o_goto_locus);
2200 check_switch_goto (struct cp_binding_level* level)
2202 check_previous_goto_1 (NULL_TREE, level, level->names, NULL);
2205 /* Check that any previously seen jumps to a newly defined label DECL
2206 are OK. Called by define_label. */
2209 check_previous_gotos (tree decl)
2211 struct named_label_use_list **usep;
2213 if (! TREE_USED (decl))
2216 for (usep = &named_label_uses; *usep; )
2218 struct named_label_use_list *use = *usep;
2219 if (use->label_decl == decl)
2221 check_previous_goto (use);
2225 usep = &(use->next);
2229 /* Check that a new jump to a label DECL is OK. Called by
2230 finish_goto_stmt. */
2233 check_goto (tree decl)
2237 struct named_label_list *lab;
2239 /* We can't know where a computed goto is jumping. So we assume
2241 if (! DECL_P (decl))
2244 /* If the label hasn't been defined yet, defer checking. */
2245 if (! DECL_INITIAL (decl))
2251 for (lab = named_labels; lab; lab = lab->next)
2252 if (decl == lab->label_decl)
2255 /* If the label is not on named_labels it's a gcc local label, so
2256 it must be in an outer scope, so jumping to it is always OK. */
2260 if ((lab->in_try_scope || lab->in_catch_scope || lab->bad_decls)
2263 cp_pedwarn_at ("jump to label %qD", decl);
2264 pedwarn (" from here");
2268 for (bad = lab->bad_decls; bad; bad = TREE_CHAIN (bad))
2270 tree b = TREE_VALUE (bad);
2271 int u = decl_jump_unsafe (b);
2273 if (u > 1 && DECL_ARTIFICIAL (b))
2274 /* Can't skip init of __exception_info. */
2275 error ("%J enters catch block", b);
2277 cp_error_at (" skips initialization of %q#D", b);
2279 cp_pedwarn_at (" enters scope of non-POD %q#D", b);
2282 if (lab->in_try_scope)
2283 error (" enters try block");
2284 else if (lab->in_catch_scope)
2285 error (" enters catch block");
2288 /* Define a label, specifying the location in the source file.
2289 Return the LABEL_DECL node for the label. */
2292 define_label (location_t location, tree name)
2294 tree decl = lookup_label (name);
2295 struct named_label_list *ent;
2296 struct cp_binding_level *p;
2298 timevar_push (TV_NAME_LOOKUP);
2299 for (ent = named_labels; ent; ent = ent->next)
2300 if (ent->label_decl == decl)
2303 /* After labels, make any new cleanups in the function go into their
2304 own new (temporary) binding contour. */
2305 for (p = current_binding_level;
2306 p->kind != sk_function_parms;
2308 p->more_cleanups_ok = 0;
2310 if (name == get_identifier ("wchar_t"))
2311 pedwarn ("label named wchar_t");
2313 if (DECL_INITIAL (decl) != NULL_TREE)
2314 error ("duplicate label %qD", decl);
2317 /* Mark label as having been defined. */
2318 DECL_INITIAL (decl) = error_mark_node;
2319 /* Say where in the source. */
2320 DECL_SOURCE_LOCATION (decl) = location;
2323 ent->names_in_scope = current_binding_level->names;
2324 ent->binding_level = current_binding_level;
2326 check_previous_gotos (decl);
2329 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2334 struct cp_binding_level *level;
2335 struct cp_switch *next;
2336 /* The SWITCH_STMT being built. */
2338 /* A splay-tree mapping the low element of a case range to the high
2339 element, or NULL_TREE if there is no high element. Used to
2340 determine whether or not a new case label duplicates an old case
2341 label. We need a tree, rather than simply a hash table, because
2342 of the GNU case range extension. */
2346 /* A stack of the currently active switch statements. The innermost
2347 switch statement is on the top of the stack. There is no need to
2348 mark the stack for garbage collection because it is only active
2349 during the processing of the body of a function, and we never
2350 collect at that point. */
2352 static struct cp_switch *switch_stack;
2354 /* Called right after a switch-statement condition is parsed.
2355 SWITCH_STMT is the switch statement being parsed. */
2358 push_switch (tree switch_stmt)
2360 struct cp_switch *p = xmalloc (sizeof (struct cp_switch));
2361 p->level = current_binding_level;
2362 p->next = switch_stack;
2363 p->switch_stmt = switch_stmt;
2364 p->cases = splay_tree_new (case_compare, NULL, NULL);
2371 struct cp_switch *cs = switch_stack;
2373 /* Emit warnings as needed. */
2374 c_do_switch_warnings (cs->cases, cs->switch_stmt);
2376 splay_tree_delete (cs->cases);
2377 switch_stack = switch_stack->next;
2381 /* Note that we've seen a definition of a case label, and complain if this
2382 is a bad place for one. */
2385 finish_case_label (tree low_value, tree high_value)
2388 struct cp_binding_level *p;
2390 if (processing_template_decl)
2394 /* For templates, just add the case label; we'll do semantic
2395 analysis at instantiation-time. */
2396 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2397 return add_stmt (build_case_label (low_value, high_value, label));
2400 /* Find the condition on which this switch statement depends. */
2401 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2402 if (cond && TREE_CODE (cond) == TREE_LIST)
2403 cond = TREE_VALUE (cond);
2405 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2406 low_value, high_value);
2408 check_switch_goto (switch_stack->level);
2410 /* After labels, make any new cleanups in the function go into their
2411 own new (temporary) binding contour. */
2412 for (p = current_binding_level;
2413 p->kind != sk_function_parms;
2415 p->more_cleanups_ok = 0;
2420 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2423 typename_hash (const void* k)
2428 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2429 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2434 typedef struct typename_info {
2442 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2445 typename_compare (const void * k1, const void * k2)
2448 const typename_info *t2;
2451 t2 = (const typename_info *) k2;
2453 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2454 && TYPE_CONTEXT (t1) == t2->scope
2455 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2456 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2457 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2460 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2461 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2463 Returns the new TYPENAME_TYPE. */
2465 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2468 build_typename_type (tree context, tree name, tree fullname,
2469 enum tag_types tag_type)
2477 if (typename_htab == NULL)
2478 typename_htab = htab_create_ggc (61, &typename_hash,
2479 &typename_compare, NULL);
2481 ti.scope = FROB_CONTEXT (context);
2483 ti.template_id = fullname;
2484 ti.enum_p = tag_type == enum_type;
2485 ti.class_p = (tag_type == class_type
2486 || tag_type == record_type
2487 || tag_type == union_type);
2488 hash = (htab_hash_pointer (ti.scope)
2489 ^ htab_hash_pointer (ti.name));
2491 /* See if we already have this type. */
2492 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2497 /* Build the TYPENAME_TYPE. */
2498 t = make_aggr_type (TYPENAME_TYPE);
2499 TYPE_CONTEXT (t) = ti.scope;
2500 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2501 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2502 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2504 /* Build the corresponding TYPE_DECL. */
2505 d = build_decl (TYPE_DECL, name, t);
2506 TYPE_NAME (TREE_TYPE (d)) = d;
2507 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2508 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2509 DECL_ARTIFICIAL (d) = 1;
2511 /* Store it in the hash table. */
2518 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2519 provided to name the type. Returns an appropriate type, unless an
2520 error occurs, in which case error_mark_node is returned. If we
2521 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2522 return that, rather than the _TYPE it corresponds to, in other
2523 cases we look through the type decl. If TF_ERROR is set, complain
2524 about errors, otherwise be quiet. */
2527 make_typename_type (tree context, tree name, enum tag_types tag_type,
2528 tsubst_flags_t complain)
2532 if (name == error_mark_node
2533 || context == NULL_TREE
2534 || context == error_mark_node)
2535 return error_mark_node;
2539 if (!(TYPE_LANG_SPECIFIC (name)
2540 && (CLASSTYPE_IS_TEMPLATE (name)
2541 || CLASSTYPE_USE_TEMPLATE (name))))
2542 name = TYPE_IDENTIFIER (name);
2544 /* Create a TEMPLATE_ID_EXPR for the type. */
2545 name = build_nt (TEMPLATE_ID_EXPR,
2546 CLASSTYPE_TI_TEMPLATE (name),
2547 CLASSTYPE_TI_ARGS (name));
2549 else if (TREE_CODE (name) == TYPE_DECL)
2550 name = DECL_NAME (name);
2554 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2556 name = TREE_OPERAND (name, 0);
2557 if (TREE_CODE (name) == TEMPLATE_DECL)
2558 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2560 if (TREE_CODE (name) == TEMPLATE_DECL)
2562 error ("%qD used without template parameters", name);
2563 return error_mark_node;
2565 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2566 gcc_assert (TYPE_P (context));
2568 if (!dependent_type_p (context)
2569 || currently_open_class (context))
2571 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2573 tree tmpl = NULL_TREE;
2574 if (IS_AGGR_TYPE (context))
2575 tmpl = lookup_field (context, name, 0, false);
2576 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2578 if (complain & tf_error)
2579 error ("no class template named %q#T in %q#T",
2581 return error_mark_node;
2584 if (complain & tf_error)
2585 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2587 return lookup_template_class (tmpl,
2588 TREE_OPERAND (fullname, 1),
2590 /*entering_scope=*/0,
2591 tf_error | tf_warning | tf_user);
2597 if (!IS_AGGR_TYPE (context))
2599 if (complain & tf_error)
2600 error ("no type named %q#T in %q#T", name, context);
2601 return error_mark_node;
2604 t = lookup_field (context, name, 0, true);
2607 if (TREE_CODE (t) != TYPE_DECL)
2609 if (complain & tf_error)
2610 error ("no type named %q#T in %q#T", name, context);
2611 return error_mark_node;
2614 if (complain & tf_error)
2615 perform_or_defer_access_check (TYPE_BINFO (context), t);
2617 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2625 /* If the CONTEXT is not a template type, then either the field is
2626 there now or its never going to be. */
2627 if (!dependent_type_p (context))
2629 if (complain & tf_error)
2630 error ("no type named %q#T in %q#T", name, context);
2631 return error_mark_node;
2634 return build_typename_type (context, name, fullname, tag_type);
2637 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2638 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2639 in which case error_mark_node is returned.
2641 If PARM_LIST is non-NULL, also make sure that the template parameter
2642 list of TEMPLATE_DECL matches.
2644 If COMPLAIN zero, don't complain about any errors that occur. */
2647 make_unbound_class_template (tree context, tree name, tree parm_list,
2648 tsubst_flags_t complain)
2654 name = TYPE_IDENTIFIER (name);
2655 else if (DECL_P (name))
2656 name = DECL_NAME (name);
2657 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2659 if (!dependent_type_p (context)
2660 || currently_open_class (context))
2662 tree tmpl = NULL_TREE;
2664 if (IS_AGGR_TYPE (context))
2665 tmpl = lookup_field (context, name, 0, false);
2667 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2669 if (complain & tf_error)
2670 error ("no class template named %q#T in %q#T", name, context);
2671 return error_mark_node;
2675 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2677 if (complain & tf_error)
2679 error ("template parameters do not match template");
2680 cp_error_at ("%qD declared here", tmpl);
2682 return error_mark_node;
2685 if (complain & tf_error)
2686 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2691 /* Build the UNBOUND_CLASS_TEMPLATE. */
2692 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2693 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2694 TREE_TYPE (t) = NULL_TREE;
2696 /* Build the corresponding TEMPLATE_DECL. */
2697 d = build_decl (TEMPLATE_DECL, name, t);
2698 TYPE_NAME (TREE_TYPE (d)) = d;
2699 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2700 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2701 DECL_ARTIFICIAL (d) = 1;
2702 DECL_TEMPLATE_PARMS (d) = parm_list;
2709 /* Push the declarations of builtin types into the namespace.
2710 RID_INDEX is the index of the builtin type in the array
2711 RID_POINTERS. NAME is the name used when looking up the builtin
2712 type. TYPE is the _TYPE node for the builtin type. */
2715 record_builtin_type (enum rid rid_index,
2719 tree rname = NULL_TREE, tname = NULL_TREE;
2720 tree tdecl = NULL_TREE;
2722 if ((int) rid_index < (int) RID_MAX)
2723 rname = ridpointers[(int) rid_index];
2725 tname = get_identifier (name);
2727 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2728 eliminated. Built-in types should not be looked up name; their
2729 names are keywords that the parser can recognize. However, there
2730 is code in c-common.c that uses identifier_global_value to look
2731 up built-in types by name. */
2734 tdecl = build_decl (TYPE_DECL, tname, type);
2735 DECL_ARTIFICIAL (tdecl) = 1;
2736 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2742 tdecl = build_decl (TYPE_DECL, rname, type);
2743 DECL_ARTIFICIAL (tdecl) = 1;
2745 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2748 if (!TYPE_NAME (type))
2749 TYPE_NAME (type) = tdecl;
2752 debug_hooks->type_decl (tdecl, 0);
2755 /* Record one of the standard Java types.
2756 * Declare it as having the given NAME.
2757 * If SIZE > 0, it is the size of one of the integral types;
2758 * otherwise it is the negative of the size of one of the other types. */
2761 record_builtin_java_type (const char* name, int size)
2765 type = make_signed_type (size);
2766 else if (size > -32)
2767 { /* "__java_char" or ""__java_boolean". */
2768 type = make_unsigned_type (-size);
2769 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2772 { /* "__java_float" or ""__java_double". */
2773 type = make_node (REAL_TYPE);
2774 TYPE_PRECISION (type) = - size;
2777 record_builtin_type (RID_MAX, name, type);
2778 decl = TYPE_NAME (type);
2780 /* Suppress generate debug symbol entries for these types,
2781 since for normal C++ they are just clutter.
2782 However, push_lang_context undoes this if extern "Java" is seen. */
2783 DECL_IGNORED_P (decl) = 1;
2785 TYPE_FOR_JAVA (type) = 1;
2789 /* Push a type into the namespace so that the back-ends ignore it. */
2792 record_unknown_type (tree type, const char* name)
2794 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
2795 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2796 DECL_IGNORED_P (decl) = 1;
2797 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
2798 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
2799 TYPE_ALIGN (type) = 1;
2800 TYPE_USER_ALIGN (type) = 0;
2801 TYPE_MODE (type) = TYPE_MODE (void_type_node);
2804 /* An string for which we should create an IDENTIFIER_NODE at
2807 typedef struct predefined_identifier
2809 /* The name of the identifier. */
2810 const char *const name;
2811 /* The place where the IDENTIFIER_NODE should be stored. */
2813 /* Nonzero if this is the name of a constructor or destructor. */
2814 const int ctor_or_dtor_p;
2815 } predefined_identifier;
2817 /* Create all the predefined identifiers. */
2820 initialize_predefined_identifiers (void)
2822 const predefined_identifier *pid;
2824 /* A table of identifiers to create at startup. */
2825 static const predefined_identifier predefined_identifiers[] = {
2826 { "C++", &lang_name_cplusplus, 0 },
2827 { "C", &lang_name_c, 0 },
2828 { "Java", &lang_name_java, 0 },
2829 /* Some of these names have a trailing space so that it is
2830 impossible for them to conflict with names written by users. */
2831 { "__ct ", &ctor_identifier, 1 },
2832 { "__base_ctor ", &base_ctor_identifier, 1 },
2833 { "__comp_ctor ", &complete_ctor_identifier, 1 },
2834 { "__dt ", &dtor_identifier, 1 },
2835 { "__comp_dtor ", &complete_dtor_identifier, 1 },
2836 { "__base_dtor ", &base_dtor_identifier, 1 },
2837 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
2838 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
2839 { "nelts", &nelts_identifier, 0 },
2840 { THIS_NAME, &this_identifier, 0 },
2841 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
2842 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
2843 { "_vptr", &vptr_identifier, 0 },
2844 { "__vtt_parm", &vtt_parm_identifier, 0 },
2845 { "::", &global_scope_name, 0 },
2846 { "std", &std_identifier, 0 },
2850 for (pid = predefined_identifiers; pid->name; ++pid)
2852 *pid->node = get_identifier (pid->name);
2853 if (pid->ctor_or_dtor_p)
2854 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
2858 /* Create the predefined scalar types of C,
2859 and some nodes representing standard constants (0, 1, (void *)0).
2860 Initialize the global binding level.
2861 Make definitions for built-in primitive functions. */
2864 cxx_init_decl_processing (void)
2867 tree void_ftype_ptr;
2869 build_common_tree_nodes (flag_signed_char, false);
2871 /* Create all the identifiers we need. */
2872 initialize_predefined_identifiers ();
2874 /* Create the global variables. */
2875 push_to_top_level ();
2877 current_function_decl = NULL_TREE;
2878 current_binding_level = NULL;
2879 /* Enter the global namespace. */
2880 gcc_assert (global_namespace == NULL_TREE);
2881 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
2883 begin_scope (sk_namespace, global_namespace);
2885 current_lang_name = NULL_TREE;
2887 /* Adjust various flags based on command-line settings. */
2888 if (!flag_permissive)
2889 flag_pedantic_errors = 1;
2890 if (!flag_no_inline)
2892 flag_inline_trees = 1;
2895 if (flag_inline_functions)
2896 flag_inline_trees = 2;
2898 /* Force minimum function alignment if using the least significant
2899 bit of function pointers to store the virtual bit. */
2900 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
2901 && force_align_functions_log < 1)
2902 force_align_functions_log = 1;
2905 current_lang_name = lang_name_c;
2907 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
2908 TREE_TYPE (error_mark_list) = error_mark_node;
2910 /* Create the `std' namespace. */
2911 push_namespace (std_identifier);
2912 std_node = current_namespace;
2915 c_common_nodes_and_builtins ();
2917 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
2918 java_short_type_node = record_builtin_java_type ("__java_short", 16);
2919 java_int_type_node = record_builtin_java_type ("__java_int", 32);
2920 java_long_type_node = record_builtin_java_type ("__java_long", 64);
2921 java_float_type_node = record_builtin_java_type ("__java_float", -32);
2922 java_double_type_node = record_builtin_java_type ("__java_double", -64);
2923 java_char_type_node = record_builtin_java_type ("__java_char", -16);
2924 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
2926 integer_two_node = build_int_cst (NULL_TREE, 2);
2927 integer_three_node = build_int_cst (NULL_TREE, 3);
2929 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
2930 truthvalue_type_node = boolean_type_node;
2931 truthvalue_false_node = boolean_false_node;
2932 truthvalue_true_node = boolean_true_node;
2934 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
2937 record_builtin_type (RID_MAX, NULL, string_type_node);
2940 delta_type_node = ptrdiff_type_node;
2941 vtable_index_type = ptrdiff_type_node;
2943 vtt_parm_type = build_pointer_type (const_ptr_type_node);
2944 void_ftype = build_function_type (void_type_node, void_list_node);
2945 void_ftype_ptr = build_function_type (void_type_node,
2946 tree_cons (NULL_TREE,
2950 = build_exception_variant (void_ftype_ptr, empty_except_spec);
2952 /* C++ extensions */
2954 unknown_type_node = make_node (UNKNOWN_TYPE);
2955 record_unknown_type (unknown_type_node, "unknown type");
2957 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
2958 TREE_TYPE (unknown_type_node) = unknown_type_node;
2960 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
2962 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
2963 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
2966 /* Make sure we get a unique function type, so we can give
2967 its pointer type a name. (This wins for gdb.) */
2968 tree vfunc_type = make_node (FUNCTION_TYPE);
2969 TREE_TYPE (vfunc_type) = integer_type_node;
2970 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
2971 layout_type (vfunc_type);
2973 vtable_entry_type = build_pointer_type (vfunc_type);
2975 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
2978 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
2979 layout_type (vtbl_type_node);
2980 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
2981 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
2982 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
2983 layout_type (vtbl_ptr_type_node);
2984 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
2986 push_namespace (get_identifier ("__cxxabiv1"));
2987 abi_node = current_namespace;
2990 global_type_node = make_node (LANG_TYPE);
2991 record_unknown_type (global_type_node, "global type");
2994 current_lang_name = lang_name_cplusplus;
2998 tree bad_alloc_type_node;
2999 tree bad_alloc_decl;
3000 tree newtype, deltype;
3001 tree ptr_ftype_sizetype;
3003 push_namespace (std_identifier);
3004 bad_alloc_id = get_identifier ("bad_alloc");
3005 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3006 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3008 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3009 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3010 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3014 = build_function_type (ptr_type_node,
3015 tree_cons (NULL_TREE,
3018 newtype = build_exception_variant
3019 (ptr_ftype_sizetype, add_exception_specifier
3020 (NULL_TREE, bad_alloc_type_node, -1));
3021 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3022 push_cp_library_fn (NEW_EXPR, newtype);
3023 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3024 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3025 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3029 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3031 /* Perform other language dependent initializations. */
3032 init_class_processing ();
3033 init_rtti_processing ();
3035 if (flag_exceptions)
3036 init_exception_processing ();
3038 if (! supports_one_only ())
3041 make_fname_decl = cp_make_fname_decl;
3042 start_fname_decls ();
3044 /* Show we use EH for cleanups. */
3045 if (flag_exceptions)
3046 using_eh_for_cleanups ();
3049 /* Generate an initializer for a function naming variable from
3050 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3051 filled in with the type of the init. */
3054 cp_fname_init (const char* name, tree *type_p)
3056 tree domain = NULL_TREE;
3058 tree init = NULL_TREE;
3063 length = strlen (name);
3064 domain = build_index_type (size_int (length));
3065 init = build_string (length + 1, name);
3068 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3069 type = build_cplus_array_type (type, domain);
3074 TREE_TYPE (init) = type;
3076 init = error_mark_node;
3081 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3082 decl, NAME is the initialization string and TYPE_DEP indicates whether
3083 NAME depended on the type of the function. We make use of that to detect
3084 __PRETTY_FUNCTION__ inside a template fn. This is being done
3085 lazily at the point of first use, so we mustn't push the decl now. */
3088 cp_make_fname_decl (tree id, int type_dep)
3090 const char *const name = (type_dep && processing_template_decl
3091 ? NULL : fname_as_string (type_dep));
3093 tree init = cp_fname_init (name, &type);
3094 tree decl = build_decl (VAR_DECL, id, type);
3097 free ((char *) name);
3099 /* As we're using pushdecl_with_scope, we must set the context. */
3100 DECL_CONTEXT (decl) = current_function_decl;
3101 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3103 TREE_STATIC (decl) = 1;
3104 TREE_READONLY (decl) = 1;
3105 DECL_ARTIFICIAL (decl) = 1;
3106 DECL_INITIAL (decl) = init;
3108 TREE_USED (decl) = 1;
3110 if (current_function_decl)
3112 struct cp_binding_level *b = current_binding_level;
3113 while (b->level_chain->kind != sk_function_parms)
3115 pushdecl_with_scope (decl, b);
3116 cp_finish_decl (decl, init, NULL_TREE, LOOKUP_ONLYCONVERTING);
3119 pushdecl_top_level_and_finish (decl, init);
3124 /* Make a definition for a builtin function named NAME in the current
3125 namespace, whose data type is TYPE and whose context is CONTEXT.
3126 TYPE should be a function type with argument types.
3128 CLASS and CODE tell later passes how to compile calls to this function.
3129 See tree.h for possible values.
3131 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3132 the name to be called if we can't opencode the function.
3133 If ATTRS is nonzero, use that for the function's attribute
3137 builtin_function_1 (const char* name,
3140 enum built_in_function code,
3141 enum built_in_class class,
3142 const char* libname,
3145 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3146 DECL_BUILT_IN_CLASS (decl) = class;
3147 DECL_FUNCTION_CODE (decl) = code;
3148 DECL_CONTEXT (decl) = context;
3152 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3153 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3154 function in the namespace. */
3156 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3158 /* Warn if a function in the namespace for users
3159 is used without an occasion to consider it declared. */
3160 if (name[0] != '_' || name[1] != '_')
3161 DECL_ANTICIPATED (decl) = 1;
3163 /* Possibly apply some default attributes to this built-in function. */
3165 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3167 decl_attributes (&decl, NULL_TREE, 0);
3172 /* Entry point for the benefit of c_common_nodes_and_builtins.
3174 Make a definition for a builtin function named NAME and whose data type
3175 is TYPE. TYPE should be a function type with argument types. This
3176 function places the anticipated declaration in the global namespace
3177 and additionally in the std namespace if appropriate.
3179 CLASS and CODE tell later passes how to compile calls to this function.
3180 See tree.h for possible values.
3182 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3183 the name to be called if we can't opencode the function.
3185 If ATTRS is nonzero, use that for the function's attribute
3189 builtin_function (const char* name,
3192 enum built_in_class cl,
3193 const char* libname,
3196 /* All builtins that don't begin with an '_' should additionally
3197 go in the 'std' namespace. */
3200 push_namespace (std_identifier);
3201 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3205 return builtin_function_1 (name, type, NULL_TREE, code,
3206 cl, libname, attrs);
3209 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3210 function. Not called directly. */
3213 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3215 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3216 DECL_EXTERNAL (fn) = 1;
3217 TREE_PUBLIC (fn) = 1;
3218 DECL_ARTIFICIAL (fn) = 1;
3219 TREE_NOTHROW (fn) = 1;
3220 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3221 SET_DECL_LANGUAGE (fn, lang_c);
3222 /* Runtime library routines are, by definition, available in an
3223 external shared object. */
3224 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3225 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3229 /* Returns the _DECL for a library function with C linkage.
3230 We assume that such functions never throw; if this is incorrect,
3231 callers should unset TREE_NOTHROW. */
3234 build_library_fn (tree name, tree type)
3236 return build_library_fn_1 (name, ERROR_MARK, type);
3239 /* Returns the _DECL for a library function with C++ linkage. */
3242 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3244 tree fn = build_library_fn_1 (name, operator_code, type);
3245 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3246 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3247 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3251 /* Like build_library_fn, but takes a C string instead of an
3255 build_library_fn_ptr (const char* name, tree type)
3257 return build_library_fn (get_identifier (name), type);
3260 /* Like build_cp_library_fn, but takes a C string instead of an
3264 build_cp_library_fn_ptr (const char* name, tree type)
3266 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3269 /* Like build_library_fn, but also pushes the function so that we will
3270 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3273 push_library_fn (tree name, tree type)
3275 tree fn = build_library_fn (name, type);
3276 pushdecl_top_level (fn);
3280 /* Like build_cp_library_fn, but also pushes the function so that it
3281 will be found by normal lookup. */
3284 push_cp_library_fn (enum tree_code operator_code, tree type)
3286 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3293 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3297 push_void_library_fn (tree name, tree parmtypes)
3299 tree type = build_function_type (void_type_node, parmtypes);
3300 return push_library_fn (name, type);
3303 /* Like push_library_fn, but also note that this function throws
3304 and does not return. Used for __throw_foo and the like. */
3307 push_throw_library_fn (tree name, tree type)
3309 tree fn = push_library_fn (name, type);
3310 TREE_THIS_VOLATILE (fn) = 1;
3311 TREE_NOTHROW (fn) = 0;
3315 /* When we call finish_struct for an anonymous union, we create
3316 default copy constructors and such. But, an anonymous union
3317 shouldn't have such things; this function undoes the damage to the
3318 anonymous union type T.
3320 (The reason that we create the synthesized methods is that we don't
3321 distinguish `union { int i; }' from `typedef union { int i; } U'.
3322 The first is an anonymous union; the second is just an ordinary
3326 fixup_anonymous_aggr (tree t)
3330 /* Wipe out memory of synthesized methods. */
3331 TYPE_HAS_CONSTRUCTOR (t) = 0;
3332 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3333 TYPE_HAS_INIT_REF (t) = 0;
3334 TYPE_HAS_CONST_INIT_REF (t) = 0;
3335 TYPE_HAS_ASSIGN_REF (t) = 0;
3336 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3338 /* Splice the implicitly generated functions out of the TYPE_METHODS
3340 q = &TYPE_METHODS (t);
3343 if (DECL_ARTIFICIAL (*q))
3344 *q = TREE_CHAIN (*q);
3346 q = &TREE_CHAIN (*q);
3349 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3350 if (TYPE_METHODS (t))
3351 error ("%Jan anonymous union cannot have function members",
3352 TYPE_MAIN_DECL (t));
3354 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3355 assignment operators (because they cannot have these methods themselves).
3356 For anonymous unions this is already checked because they are not allowed
3357 in any union, otherwise we have to check it. */
3358 if (TREE_CODE (t) != UNION_TYPE)
3362 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3363 if (TREE_CODE (field) == FIELD_DECL)
3365 type = TREE_TYPE (field);
3366 if (CLASS_TYPE_P (type))
3368 if (TYPE_NEEDS_CONSTRUCTING (type))
3369 cp_error_at ("member %q#D with constructor not allowed "
3370 "in anonymous aggregate",
3372 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3373 cp_error_at ("member %q#D with destructor not allowed "
3374 "in anonymous aggregate",
3376 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3377 cp_error_at ("member %q#D with copy assignment operator "
3378 "not allowed in anonymous aggregate",
3385 /* Make sure that a declaration with no declarator is well-formed, i.e.
3386 just declares a tagged type or anonymous union.
3388 Returns the type declared; or NULL_TREE if none. */
3391 check_tag_decl (cp_decl_specifier_seq *declspecs)
3393 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3394 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3395 /* If a class, struct, or enum type is declared by the DECLSPECS
3396 (i.e, if a class-specifier, enum-specifier, or non-typename
3397 elaborated-type-specifier appears in the DECLSPECS),
3398 DECLARED_TYPE is set to the corresponding type. */
3399 tree declared_type = NULL_TREE;
3400 bool error_p = false;
3402 if (declspecs->multiple_types_p)
3403 error ("multiple types in one declaration");
3404 else if (declspecs->redefined_builtin_type)
3406 if (!in_system_header)
3407 pedwarn ("redeclaration of C++ built-in type %qT",
3408 declspecs->redefined_builtin_type);
3413 && TYPE_P (declspecs->type)
3414 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3415 && IS_AGGR_TYPE (declspecs->type))
3416 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3417 declared_type = declspecs->type;
3418 else if (declspecs->type == error_mark_node)
3420 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3421 pedwarn ("declaration does not declare anything");
3422 /* Check for an anonymous union. */
3423 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3424 && TYPE_ANONYMOUS_P (declared_type))
3426 /* 7/3 In a simple-declaration, the optional init-declarator-list
3427 can be omitted only when declaring a class (clause 9) or
3428 enumeration (7.2), that is, when the decl-specifier-seq contains
3429 either a class-specifier, an elaborated-type-specifier with
3430 a class-key (9.1), or an enum-specifier. In these cases and
3431 whenever a class-specifier or enum-specifier is present in the
3432 decl-specifier-seq, the identifiers in these specifiers are among
3433 the names being declared by the declaration (as class-name,
3434 enum-names, or enumerators, depending on the syntax). In such
3435 cases, and except for the declaration of an unnamed bit-field (9.6),
3436 the decl-specifier-seq shall introduce one or more names into the
3437 program, or shall redeclare a name introduced by a previous
3438 declaration. [Example:
3439 enum { }; // ill-formed
3440 typedef class { }; // ill-formed
3444 error ("missing type-name in typedef-declaration");
3447 /* Anonymous unions are objects, so they can have specifiers. */;
3448 SET_ANON_AGGR_TYPE_P (declared_type);
3450 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3451 && !in_system_header)
3452 pedwarn ("ISO C++ prohibits anonymous structs");
3457 if (declspecs->specs[(int)ds_inline]
3458 || declspecs->specs[(int)ds_virtual])
3459 error ("%qs can only be specified for functions",
3460 declspecs->specs[(int)ds_inline]
3461 ? "inline" : "virtual");
3463 && (!current_class_type
3464 || current_scope () != current_class_type))
3465 error ("%<friend%> can only be specified inside a class");
3466 else if (declspecs->specs[(int)ds_explicit])
3467 error ("%<explicit%> can only be specified for constructors");
3468 else if (declspecs->storage_class)
3469 error ("a storage class can only be specified for objects "
3471 else if (declspecs->specs[(int)ds_const]
3472 || declspecs->specs[(int)ds_volatile]
3473 || declspecs->specs[(int)ds_restrict]
3474 || declspecs->specs[(int)ds_thread])
3475 error ("qualifiers can only be specified for objects "
3479 return declared_type;
3482 /* Called when a declaration is seen that contains no names to declare.
3483 If its type is a reference to a structure, union or enum inherited
3484 from a containing scope, shadow that tag name for the current scope
3485 with a forward reference.
3486 If its type defines a new named structure or union
3487 or defines an enum, it is valid but we need not do anything here.
3488 Otherwise, it is an error.
3490 C++: may have to grok the declspecs to learn about static,
3491 complain for anonymous unions.
3493 Returns the TYPE declared -- or NULL_TREE if none. */
3496 shadow_tag (cp_decl_specifier_seq *declspecs)
3498 tree t = check_tag_decl (declspecs);
3503 if (declspecs->attributes)
3505 cp_warning_at ("attribute ignored in declaration of %q#T", t);
3506 cp_warning_at ("attribute for %q#T must follow the %qs keyword",
3508 class_key_or_enum_as_string (t));
3512 maybe_process_partial_specialization (t);
3514 /* This is where the variables in an anonymous union are
3515 declared. An anonymous union declaration looks like:
3517 because there is no declarator after the union, the parser
3518 sends that declaration here. */
3519 if (ANON_AGGR_TYPE_P (t))
3521 fixup_anonymous_aggr (t);
3523 if (TYPE_FIELDS (t))
3525 tree decl = grokdeclarator (/*declarator=*/NULL,
3526 declspecs, NORMAL, 0, NULL);
3527 finish_anon_union (decl);
3534 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3537 groktypename (cp_decl_specifier_seq *type_specifiers,
3538 const cp_declarator *declarator)
3542 attrs = type_specifiers->attributes;
3543 type_specifiers->attributes = NULL_TREE;
3544 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3546 cplus_decl_attributes (&type, attrs, 0);
3550 /* Decode a declarator in an ordinary declaration or data definition.
3551 This is called as soon as the type information and variable name
3552 have been parsed, before parsing the initializer if any.
3553 Here we create the ..._DECL node, fill in its type,
3554 and put it on the list of decls for the current context.
3555 The ..._DECL node is returned as the value.
3557 Exception: for arrays where the length is not specified,
3558 the type is left null, to be filled in by `cp_finish_decl'.
3560 Function definitions do not come here; they go to start_function
3561 instead. However, external and forward declarations of functions
3562 do go through here. Structure field declarations are done by
3563 grokfield and not through here. */
3566 start_decl (const cp_declarator *declarator,
3567 cp_decl_specifier_seq *declspecs,
3570 tree prefix_attributes,
3571 tree *pushed_scope_p)
3577 *pushed_scope_p = NULL_TREE;
3579 /* This should only be done once on the top most decl. */
3580 if (have_extern_spec)
3582 declspecs->storage_class = sc_extern;
3583 have_extern_spec = false;
3586 /* An object declared as __attribute__((deprecated)) suppresses
3587 warnings of uses of other deprecated items. */
3588 if (lookup_attribute ("deprecated", attributes))
3589 deprecated_state = DEPRECATED_SUPPRESS;
3591 attributes = chainon (attributes, prefix_attributes);
3593 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3596 deprecated_state = DEPRECATED_NORMAL;
3598 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
3599 return error_mark_node;
3601 type = TREE_TYPE (decl);
3603 if (type == error_mark_node)
3604 return error_mark_node;
3606 context = DECL_CONTEXT (decl);
3610 *pushed_scope_p = push_scope (context);
3612 /* We are only interested in class contexts, later. */
3613 if (TREE_CODE (context) == NAMESPACE_DECL)
3614 context = NULL_TREE;
3618 /* Is it valid for this decl to have an initializer at all?
3619 If not, set INITIALIZED to zero, which will indirectly
3620 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3621 switch (TREE_CODE (decl))
3624 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3629 error ("function %q#D is initialized like a variable", decl);
3639 if (! toplevel_bindings_p ()
3640 && DECL_EXTERNAL (decl))
3641 warning ("declaration of %q#D has %<extern%> and is initialized",
3643 DECL_EXTERNAL (decl) = 0;
3644 if (toplevel_bindings_p ())
3645 TREE_STATIC (decl) = 1;
3647 /* Tell `pushdecl' this is an initialized decl
3648 even though we don't yet have the initializer expression.
3649 Also tell `cp_finish_decl' it may store the real initializer. */
3650 DECL_INITIAL (decl) = error_mark_node;
3653 /* Set attributes here so if duplicate decl, will have proper attributes. */
3654 cplus_decl_attributes (&decl, attributes, 0);
3656 /* If #pragma weak was used, mark the decl weak now. */
3657 maybe_apply_pragma_weak (decl);
3659 if (TREE_CODE (decl) == FUNCTION_DECL
3660 && DECL_DECLARED_INLINE_P (decl)
3661 && DECL_UNINLINABLE (decl)
3662 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3663 warning ("%Jinline function %qD given attribute noinline", decl, decl);
3665 if (context && COMPLETE_TYPE_P (complete_type (context)))
3667 if (TREE_CODE (decl) == VAR_DECL)
3669 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3670 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3671 error ("%q#D is not a static member of %q#T", decl, context);
3674 if (DECL_CONTEXT (field) != context)
3676 if (!same_type_p (DECL_CONTEXT (field), context))
3677 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3678 "to be defined as %<%T::%D%>",
3679 DECL_CONTEXT (field), DECL_NAME (decl),
3680 context, DECL_NAME (decl));
3681 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3683 if (processing_specialization
3684 && template_class_depth (context) == 0
3685 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3686 error ("template header not allowed in member definition "
3687 "of explicitly specialized class");
3688 /* Static data member are tricky; an in-class initialization
3689 still doesn't provide a definition, so the in-class
3690 declaration will have DECL_EXTERNAL set, but will have an
3691 initialization. Thus, duplicate_decls won't warn
3692 about this situation, and so we check here. */
3693 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
3694 error ("duplicate initialization of %qD", decl);
3695 if (duplicate_decls (decl, field))
3701 tree field = check_classfn (context, decl,
3702 (processing_template_decl
3703 > template_class_depth (context))
3704 ? current_template_parms
3706 if (field && duplicate_decls (decl, field))
3710 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3711 DECL_IN_AGGR_P (decl) = 0;
3712 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3713 || CLASSTYPE_TEMPLATE_INSTANTIATION (context))
3715 /* Do not mark DECL as an explicit specialization if it was
3716 not already marked as an instantiation; a declaration
3717 should never be marked as a specialization unless we know
3718 what template is being specialized. */
3719 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3720 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3721 /* [temp.expl.spec] An explicit specialization of a static data
3722 member of a template is a definition if the declaration
3723 includes an initializer; otherwise, it is a declaration.
3725 We check for processing_specialization so this only applies
3726 to the new specialization syntax. */
3727 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
3728 DECL_EXTERNAL (decl) = 1;
3731 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3732 pedwarn ("declaration of %q#D outside of class is not definition",
3736 /* Enter this declaration into the symbol table. */
3737 tem = maybe_push_decl (decl);
3739 if (processing_template_decl)
3740 tem = push_template_decl (tem);
3741 if (tem == error_mark_node)
3742 return error_mark_node;
3744 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3745 /* Tell the back-end to use or not use .common as appropriate. If we say
3746 -fconserve-space, we want this to save .data space, at the expense of
3747 wrong semantics. If we say -fno-conserve-space, we want this to
3748 produce errors about redefs; to do this we force variables into the
3750 DECL_COMMON (tem) = ((TREE_CODE (tem) != VAR_DECL
3751 || !DECL_THREAD_LOCAL (tem))
3752 && (flag_conserve_space || ! TREE_PUBLIC (tem)));
3755 if (! processing_template_decl)
3762 start_decl_1 (tree decl)
3764 tree type = TREE_TYPE (decl);
3765 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
3767 if (type == error_mark_node)
3771 /* Is it valid for this decl to have an initializer at all?
3772 If not, set INITIALIZED to zero, which will indirectly
3773 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3775 /* Don't allow initializations for incomplete types except for
3776 arrays which might be completed by the initialization. */
3777 if (COMPLETE_TYPE_P (complete_type (type)))
3778 ; /* A complete type is ok. */
3779 else if (TREE_CODE (type) != ARRAY_TYPE)
3781 error ("variable %q#D has initializer but incomplete type", decl);
3783 type = TREE_TYPE (decl) = error_mark_node;
3785 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3787 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3788 error ("elements of array %q#D have incomplete type", decl);
3789 /* else we already gave an error in start_decl. */
3795 && TREE_CODE (decl) != TYPE_DECL
3796 && TREE_CODE (decl) != TEMPLATE_DECL
3797 && type != error_mark_node
3798 && IS_AGGR_TYPE (type)
3799 && ! DECL_EXTERNAL (decl))
3801 if ((! processing_template_decl || ! uses_template_parms (type))
3802 && !COMPLETE_TYPE_P (complete_type (type)))
3804 error ("aggregate %q#D has incomplete type and cannot be defined",
3806 /* Change the type so that assemble_variable will give
3807 DECL an rtl we can live with: (mem (const_int 0)). */
3808 type = TREE_TYPE (decl) = error_mark_node;
3812 /* If any base type in the hierarchy of TYPE needs a constructor,
3813 then we set initialized to 1. This way any nodes which are
3814 created for the purposes of initializing this aggregate
3815 will live as long as it does. This is necessary for global
3816 aggregates which do not have their initializers processed until
3817 the end of the file. */
3818 initialized = TYPE_NEEDS_CONSTRUCTING (type);
3823 DECL_INITIAL (decl) = NULL_TREE;
3825 /* Create a new scope to hold this declaration if necessary.
3826 Whether or not a new scope is necessary cannot be determined
3827 until after the type has been completed; if the type is a
3828 specialization of a class template it is not until after
3829 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3830 will be set correctly. */
3831 maybe_push_cleanup_level (type);
3834 /* Handle initialization of references. DECL, TYPE, and INIT have the
3835 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3836 but will be set to a new CLEANUP_STMT if a temporary is created
3837 that must be destroyed subsequently.
3839 Returns an initializer expression to use to initialize DECL, or
3840 NULL if the initialization can be performed statically.
3842 Quotes on semantics can be found in ARM 8.4.3. */
3845 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
3849 if (init == NULL_TREE)
3851 if ((DECL_LANG_SPECIFIC (decl) == 0
3852 || DECL_IN_AGGR_P (decl) == 0)
3853 && ! DECL_THIS_EXTERN (decl))
3854 error ("%qD declared as reference but not initialized", decl);
3858 if (TREE_CODE (init) == CONSTRUCTOR)
3860 error ("ISO C++ forbids use of initializer list to "
3861 "initialize reference %qD", decl);
3865 if (TREE_CODE (init) == TREE_LIST)
3866 init = build_x_compound_expr_from_list (init, "initializer");
3868 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
3869 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
3870 /* Note: default conversion is only called in very special cases. */
3871 init = decay_conversion (init);
3873 /* Convert INIT to the reference type TYPE. This may involve the
3874 creation of a temporary, whose lifetime must be the same as that
3875 of the reference. If so, a DECL_EXPR for the temporary will be
3876 added just after the DECL_EXPR for DECL. That's why we don't set
3877 DECL_INITIAL for local references (instead assigning to them
3878 explicitly); we need to allow the temporary to be initialized
3880 tmp = initialize_reference (type, init, decl, cleanup);
3882 if (tmp == error_mark_node)
3884 else if (tmp == NULL_TREE)
3886 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
3890 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
3893 DECL_INITIAL (decl) = tmp;
3898 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3899 array until we finish parsing the initializer. If that's the
3900 situation we're in, update DECL accordingly. */
3903 maybe_deduce_size_from_array_init (tree decl, tree init)
3905 tree type = TREE_TYPE (decl);
3907 if (TREE_CODE (type) == ARRAY_TYPE
3908 && TYPE_DOMAIN (type) == NULL_TREE
3909 && TREE_CODE (decl) != TYPE_DECL)
3911 /* do_default is really a C-ism to deal with tentative definitions.
3912 But let's leave it here to ease the eventual merge. */
3913 int do_default = !DECL_EXTERNAL (decl);
3914 tree initializer = init ? init : DECL_INITIAL (decl);
3915 int failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
3919 error ("initializer fails to determine size of %qD", decl);
3924 error ("array size missing in %qD", decl);
3925 /* If a `static' var's size isn't known, make it extern as
3926 well as static, so it does not get allocated. If it's not
3927 `static', then don't mark it extern; finish_incomplete_decl
3928 will give it a default size and it will get allocated. */
3929 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
3930 DECL_EXTERNAL (decl) = 1;
3934 error ("zero-size array %qD", decl);
3936 layout_decl (decl, 0);
3940 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
3941 any appropriate error messages regarding the layout. */
3944 layout_var_decl (tree decl)
3946 tree type = TREE_TYPE (decl);
3948 tree ttype = target_type (type);
3951 /* If we haven't already layed out this declaration, do so now.
3952 Note that we must not call complete type for an external object
3953 because it's type might involve templates that we are not
3954 supposed to instantiate yet. (And it's perfectly valid to say
3955 `extern X x' for some incomplete type `X'.) */
3956 if (!DECL_EXTERNAL (decl))
3957 complete_type (type);
3958 if (!DECL_SIZE (decl)
3959 && TREE_TYPE (decl) != error_mark_node
3960 && (COMPLETE_TYPE_P (type)
3961 || (TREE_CODE (type) == ARRAY_TYPE
3962 && !TYPE_DOMAIN (type)
3963 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
3964 layout_decl (decl, 0);
3966 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
3968 /* An automatic variable with an incomplete type: that is an error.
3969 Don't talk about array types here, since we took care of that
3970 message in grokdeclarator. */
3971 error ("storage size of %qD isn't known", decl);
3972 TREE_TYPE (decl) = error_mark_node;
3975 /* Keep this code around in case we later want to control debug info
3976 based on whether a type is "used". (jason 1999-11-11) */
3978 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
3979 /* Let debugger know it should output info for this type. */
3980 note_debug_info_needed (ttype);
3982 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
3983 note_debug_info_needed (DECL_CONTEXT (decl));
3986 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
3987 && DECL_SIZE (decl) != NULL_TREE
3988 && ! TREE_CONSTANT (DECL_SIZE (decl)))
3990 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
3991 constant_expression_warning (DECL_SIZE (decl));
3993 error ("storage size of %qD isn't constant", decl);
3996 if (TREE_STATIC (decl)
3997 && !DECL_ARTIFICIAL (decl)
3998 && current_function_decl
3999 && DECL_CONTEXT (decl) == current_function_decl)
4000 push_local_name (decl);
4003 /* If a local static variable is declared in an inline function, or if
4004 we have a weak definition, we must endeavor to create only one
4005 instance of the variable at link-time. */
4008 maybe_commonize_var (tree decl)
4010 /* Static data in a function with comdat linkage also has comdat
4012 if (TREE_STATIC (decl)
4013 /* Don't mess with __FUNCTION__. */
4014 && ! DECL_ARTIFICIAL (decl)
4015 && DECL_FUNCTION_SCOPE_P (decl)
4016 /* Unfortunately, import_export_decl has not always been called
4017 before the function is processed, so we cannot simply check
4019 && (DECL_COMDAT (DECL_CONTEXT (decl))
4020 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4021 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4022 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4026 /* With weak symbols, we simply make the variable COMDAT;
4027 that will cause copies in multiple translations units to
4029 comdat_linkage (decl);
4033 if (DECL_INITIAL (decl) == NULL_TREE
4034 || DECL_INITIAL (decl) == error_mark_node)
4036 /* Without weak symbols, we can use COMMON to merge
4037 uninitialized variables. */
4038 TREE_PUBLIC (decl) = 1;
4039 DECL_COMMON (decl) = 1;
4043 /* While for initialized variables, we must use internal
4044 linkage -- which means that multiple copies will not
4046 TREE_PUBLIC (decl) = 0;
4047 DECL_COMMON (decl) = 0;
4048 cp_warning_at ("sorry: semantics of inline function static "
4049 "data %q#D are wrong (you'll wind up "
4050 "with multiple copies)", decl);
4051 warning ("%J you can work around this by removing "
4057 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4058 /* Set it up again; we might have set DECL_INITIAL since the last
4060 comdat_linkage (decl);
4063 /* Issue an error message if DECL is an uninitialized const variable. */
4066 check_for_uninitialized_const_var (tree decl)
4068 tree type = TREE_TYPE (decl);
4070 /* ``Unless explicitly declared extern, a const object does not have
4071 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4073 if (TREE_CODE (decl) == VAR_DECL
4074 && TREE_CODE (type) != REFERENCE_TYPE
4075 && CP_TYPE_CONST_P (type)
4076 && !TYPE_NEEDS_CONSTRUCTING (type)
4077 && !DECL_INITIAL (decl))
4078 error ("uninitialized const %qD", decl);
4081 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4082 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4083 initialized. If there are no more such fields, the return value
4087 next_initializable_field (tree field)
4090 && (TREE_CODE (field) != FIELD_DECL
4091 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4092 || DECL_ARTIFICIAL (field)))
4093 field = TREE_CHAIN (field);
4098 /* Subroutine of reshape_init. Reshape the constructor for an array. INITP
4099 is the pointer to the old constructor list (to the CONSTRUCTOR_ELTS of
4100 the CONSTRUCTOR we are processing), while NEW_INIT is the CONSTRUCTOR we
4102 ELT_TYPE is the element type of the array. MAX_INDEX is an INTEGER_CST
4103 representing the size of the array minus one (the maximum index), or
4104 NULL_TREE if the array was declared without specifying the size. */
4107 reshape_init_array (tree elt_type, tree max_index,
4108 tree *initp, tree new_init)
4110 bool sized_array_p = (max_index != NULL_TREE);
4111 unsigned HOST_WIDE_INT max_index_cst = 0;
4112 unsigned HOST_WIDE_INT index;
4116 if (host_integerp (max_index, 1))
4117 max_index_cst = tree_low_cst (max_index, 1);
4118 /* sizetype is sign extended, not zero extended. */
4120 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4124 /* Loop until there are no more initializers. */
4126 *initp && (!sized_array_p || index <= max_index_cst);
4130 tree designated_index;
4132 element_init = reshape_init (elt_type, initp);
4133 if (element_init == error_mark_node)
4135 TREE_CHAIN (element_init) = CONSTRUCTOR_ELTS (new_init);
4136 CONSTRUCTOR_ELTS (new_init) = element_init;
4137 designated_index = TREE_PURPOSE (element_init);
4138 if (designated_index)
4140 /* Handle array designated initializers (GNU extension). */
4141 if (TREE_CODE (designated_index) == IDENTIFIER_NODE)
4143 error ("name %qD used in a GNU-style designated "
4144 "initializer for an array", designated_index);
4145 TREE_PURPOSE (element_init) = NULL_TREE;
4155 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4156 brace-enclosed aggregate initializer.
4158 *INITP is one of a list of initializers describing a brace-enclosed
4159 initializer for an entity of the indicated aggregate TYPE. It may
4160 not presently match the shape of the TYPE; for example:
4162 struct S { int a; int b; };
4163 struct S a[] = { 1, 2, 3, 4 };
4165 Here *INITP will point to TREE_LIST of four elements, rather than a
4166 list of two elements, each itself a list of two elements. This
4167 routine transforms INIT from the former form into the latter. The
4168 revised initializer is returned. */
4171 reshape_init (tree type, tree *initp)
4175 tree old_init_value;
4177 bool brace_enclosed_p;
4181 old_init_value = (TREE_CODE (*initp) == TREE_LIST
4182 ? TREE_VALUE (*initp) : old_init);
4184 gcc_assert (old_init_value);
4186 /* If the initializer is brace-enclosed, pull initializers from the
4187 enclosed elements. Advance past the brace-enclosed initializer
4189 if (TREE_CODE (old_init_value) == CONSTRUCTOR
4190 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value))
4192 *initp = TREE_CHAIN (old_init);
4193 TREE_CHAIN (old_init) = NULL_TREE;
4194 inits = CONSTRUCTOR_ELTS (old_init_value);
4196 brace_enclosed_p = true;
4201 brace_enclosed_p = false;
4204 /* A non-aggregate type is always initialized with a single
4206 if (!CP_AGGREGATE_TYPE_P (type))
4208 *initp = TREE_CHAIN (old_init);
4209 TREE_CHAIN (old_init) = NULL_TREE;
4210 /* It is invalid to initialize a non-aggregate type with a
4211 brace-enclosed initializer. */
4212 if (brace_enclosed_p)
4214 error ("brace-enclosed initializer used to initialize %qT",
4216 if (TREE_CODE (old_init) == TREE_LIST)
4217 TREE_VALUE (old_init) = error_mark_node;
4219 old_init = error_mark_node;
4227 All implicit type conversions (clause _conv_) are considered when
4228 initializing the aggregate member with an initializer from an
4229 initializer-list. If the initializer can initialize a member,
4230 the member is initialized. Otherwise, if the member is itself a
4231 non-empty subaggregate, brace elision is assumed and the
4232 initializer is considered for the initialization of the first
4233 member of the subaggregate. */
4234 if (!brace_enclosed_p
4235 && can_convert_arg (type, TREE_TYPE (old_init_value), old_init_value))
4237 *initp = TREE_CHAIN (old_init);
4238 TREE_CHAIN (old_init) = NULL_TREE;
4242 string_init_p = false;
4243 if (TREE_CODE (old_init_value) == STRING_CST
4244 && TREE_CODE (type) == ARRAY_TYPE
4245 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4247 /* [dcl.init.string]
4249 A char array (whether plain char, signed char, or unsigned char)
4250 can be initialized by a string-literal (optionally enclosed in
4251 braces); a wchar_t array can be initialized by a wide
4252 string-literal (optionally enclosed in braces). */
4253 new_init = old_init;
4254 /* Move past the initializer. */
4255 *initp = TREE_CHAIN (old_init);
4256 TREE_CHAIN (old_init) = NULL_TREE;
4257 string_init_p = true;
4261 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4262 new_init = build_constructor (NULL_TREE, NULL_TREE);
4264 if (CLASS_TYPE_P (type))
4268 field = next_initializable_field (TYPE_FIELDS (type));
4274 An initializer for an aggregate member that is an
4275 empty class shall have the form of an empty
4276 initializer-list {}. */
4277 if (!brace_enclosed_p)
4279 error ("initializer for %qT must be brace-enclosed", type);
4280 return error_mark_node;
4285 /* Loop through the initializable fields, gathering
4291 /* Handle designated initializers, as an extension. */
4292 if (TREE_PURPOSE (*initp))
4295 pedwarn ("ISO C++ does not allow designated initializers");
4296 field = lookup_field_1 (type, TREE_PURPOSE (*initp),
4297 /*want_type=*/false);
4298 if (!field || TREE_CODE (field) != FIELD_DECL)
4299 error ("%qT has no non-static data member named %qD",
4300 type, TREE_PURPOSE (*initp));
4305 field_init = reshape_init (TREE_TYPE (field), initp);
4306 if (field_init == error_mark_node)
4307 return error_mark_node;
4308 TREE_CHAIN (field_init) = CONSTRUCTOR_ELTS (new_init);
4309 CONSTRUCTOR_ELTS (new_init) = field_init;
4312 When a union is initialized with a brace-enclosed
4313 initializer, the braces shall only contain an
4314 initializer for the first member of the union. */
4315 if (TREE_CODE (type) == UNION_TYPE)
4317 field = next_initializable_field (TREE_CHAIN (field));
4321 else if (TREE_CODE (type) == ARRAY_TYPE
4322 || TREE_CODE (type) == VECTOR_TYPE)
4324 /* If the bound of the array is known, take no more initializers
4325 than are allowed. */
4326 tree max_index = NULL_TREE;
4327 if (TREE_CODE (type) == ARRAY_TYPE)
4329 if (TYPE_DOMAIN (type))
4330 max_index = array_type_nelts (type);
4334 /* For a vector, the representation type is a struct
4335 containing a single member which is an array of the
4336 appropriate size. */
4337 tree rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4338 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4339 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS
4343 if (!reshape_init_array (TREE_TYPE (type), max_index,
4345 return error_mark_node;
4350 /* The initializers were placed in reverse order in the
4352 CONSTRUCTOR_ELTS (new_init) = nreverse (CONSTRUCTOR_ELTS (new_init));
4354 if (TREE_CODE (old_init) == TREE_LIST)
4355 new_init = build_tree_list (TREE_PURPOSE (old_init), new_init);
4358 /* If there are more initializers than necessary, issue a
4362 if (brace_enclosed_p)
4363 error ("too many initializers for %qT", type);
4364 else if (warn_missing_braces && !string_init_p)
4365 warning ("missing braces around initializer");
4371 /* Verify INIT (the initializer for DECL), and record the
4372 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4373 grok_reference_init.
4375 If the return value is non-NULL, it is an expression that must be
4376 evaluated dynamically to initialize DECL. */
4379 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4381 tree type = TREE_TYPE (decl);
4382 tree init_code = NULL;
4384 /* If `start_decl' didn't like having an initialization, ignore it now. */
4385 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
4388 /* If an initializer is present, DECL_INITIAL has been
4389 error_mark_node, to indicate that an as-of-yet unevaluated
4390 initialization will occur. From now on, DECL_INITIAL reflects
4391 the static initialization -- if any -- of DECL. */
4392 DECL_INITIAL (decl) = NULL_TREE;
4394 /* Things that are going to be initialized need to have complete
4396 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4398 if (type == error_mark_node)
4399 /* We will have already complained. */
4401 else if (init && COMPLETE_TYPE_P (type)
4402 && !TREE_CONSTANT (TYPE_SIZE (type)))
4404 error ("variable-sized object %qD may not be initialized", decl);
4407 else if (TREE_CODE (type) == ARRAY_TYPE
4408 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4410 error ("elements of array %q#D have incomplete type", decl);
4413 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4415 error ("%qD has incomplete type", decl);
4416 TREE_TYPE (decl) = error_mark_node;
4420 if (TREE_CODE (decl) == CONST_DECL)
4422 gcc_assert (TREE_CODE (decl) != REFERENCE_TYPE);
4424 DECL_INITIAL (decl) = init;
4426 gcc_assert (init != NULL_TREE);
4429 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4430 init = grok_reference_init (decl, type, init, cleanup);
4433 if (TREE_CODE (init) == CONSTRUCTOR
4434 && BRACE_ENCLOSED_INITIALIZER_P (init))
4436 /* [dcl.init] paragraph 13,
4437 If T is a scalar type, then a declaration of the form
4442 reshape_init will complain about the extra braces,
4443 and doesn't do anything useful in the case where TYPE is
4444 scalar, so just don't call it. */
4445 if (CP_AGGREGATE_TYPE_P (type))
4446 init = reshape_init (type, &init);
4448 if ((*targetm.vector_opaque_p) (type))
4450 error ("opaque vector types cannot be initialized");
4451 init = error_mark_node;
4455 /* If DECL has an array type without a specific bound, deduce the
4456 array size from the initializer. */
4457 maybe_deduce_size_from_array_init (decl, init);
4458 type = TREE_TYPE (decl);
4460 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4462 if (TREE_CODE (type) == ARRAY_TYPE)
4463 goto initialize_aggr;
4464 else if (TREE_CODE (init) == CONSTRUCTOR
4465 && BRACE_ENCLOSED_INITIALIZER_P (init))
4467 if (TYPE_NON_AGGREGATE_CLASS (type))
4469 error ("%qD must be initialized by constructor, "
4472 init = error_mark_node;
4475 goto dont_use_constructor;
4479 int saved_stmts_are_full_exprs_p;
4482 saved_stmts_are_full_exprs_p = 0;
4483 if (building_stmt_tree ())
4485 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4486 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4488 init = build_aggr_init (decl, init, flags);
4489 if (building_stmt_tree ())
4490 current_stmt_tree ()->stmts_are_full_exprs_p =
4491 saved_stmts_are_full_exprs_p;
4497 dont_use_constructor:
4498 if (TREE_CODE (init) != TREE_VEC)
4500 init_code = store_init_value (decl, init);
4501 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4502 && DECL_INITIAL (decl)
4503 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4504 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4505 warning ("array %qD initialized by parenthesized string literal %qE",
4506 decl, DECL_INITIAL (decl));
4511 else if (DECL_EXTERNAL (decl))
4513 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4514 goto initialize_aggr;
4515 else if (IS_AGGR_TYPE (type))
4517 tree core_type = strip_array_types (type);
4519 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4520 error ("structure %qD with uninitialized const members", decl);
4521 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4522 error ("structure %qD with uninitialized reference members", decl);
4524 check_for_uninitialized_const_var (decl);
4527 check_for_uninitialized_const_var (decl);
4529 if (init && init != error_mark_node)
4530 init_code = build2 (INIT_EXPR, type, decl, init);
4535 /* If DECL is not a local variable, give it RTL. */
4538 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4540 int toplev = toplevel_bindings_p ();
4543 /* Set the DECL_ASSEMBLER_NAME for the object. */
4546 /* The `register' keyword, when used together with an
4547 asm-specification, indicates that the variable should be
4548 placed in a particular register. */
4549 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4551 change_decl_assembler_name (decl, get_identifier (asmspec));
4552 DECL_HARD_REGISTER (decl) = 1;
4556 if (TREE_CODE (decl) == FUNCTION_DECL
4557 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4558 set_builtin_user_assembler_name (decl, asmspec);
4559 set_user_assembler_name (decl, asmspec);
4563 /* Handle non-variables up front. */
4564 if (TREE_CODE (decl) != VAR_DECL)
4566 rest_of_decl_compilation (decl, toplev, at_eof);
4570 /* If we see a class member here, it should be a static data
4572 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4574 gcc_assert (TREE_STATIC (decl));
4575 /* An in-class declaration of a static data member should be
4576 external; it is only a declaration, and not a definition. */
4577 if (init == NULL_TREE)
4578 gcc_assert (DECL_EXTERNAL (decl));
4581 /* We don't create any RTL for local variables. */
4582 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4585 /* We defer emission of local statics until the corresponding
4586 DECL_EXPR is expanded. */
4587 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4589 /* We try to defer namespace-scope static constants so that they are
4590 not emitted into the object file unnecessarily. */
4591 if (!DECL_VIRTUAL_P (decl)
4592 && TREE_READONLY (decl)
4593 && DECL_INITIAL (decl) != NULL_TREE
4594 && DECL_INITIAL (decl) != error_mark_node
4595 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4597 && !TREE_PUBLIC (decl))
4599 /* Fool with the linkage of static consts according to #pragma
4601 struct c_fileinfo *finfo = get_fileinfo (lbasename (input_filename));
4602 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4604 TREE_PUBLIC (decl) = 1;
4605 DECL_EXTERNAL (decl) = finfo->interface_only;
4610 /* Likewise for template instantiations. */
4611 else if (DECL_LANG_SPECIFIC (decl)
4612 && DECL_IMPLICIT_INSTANTIATION (decl))
4615 /* If we're not deferring, go ahead and assemble the variable. */
4617 rest_of_decl_compilation (decl, toplev, at_eof);
4620 /* Generate code to initialize DECL (a local variable). */
4623 initialize_local_var (tree decl, tree init)
4625 tree type = TREE_TYPE (decl);
4628 gcc_assert (TREE_CODE (decl) == VAR_DECL
4629 || TREE_CODE (decl) == RESULT_DECL);
4630 gcc_assert (!TREE_STATIC (decl));
4632 if (DECL_SIZE (decl) == NULL_TREE)
4634 /* If we used it already as memory, it must stay in memory. */
4635 DECL_INITIAL (decl) = NULL_TREE;
4636 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4639 if (DECL_SIZE (decl) && type != error_mark_node)
4643 /* Compute and store the initial value. */
4644 already_used = TREE_USED (decl) || TREE_USED (type);
4646 /* Perform the initialization. */
4649 int saved_stmts_are_full_exprs_p;
4651 gcc_assert (building_stmt_tree ());
4652 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4653 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4654 finish_expr_stmt (init);
4655 current_stmt_tree ()->stmts_are_full_exprs_p =
4656 saved_stmts_are_full_exprs_p;
4659 /* Set this to 0 so we can tell whether an aggregate which was
4660 initialized was ever used. Don't do this if it has a
4661 destructor, so we don't complain about the 'resource
4662 allocation is initialization' idiom. Now set
4663 attribute((unused)) on types so decls of that type will be
4664 marked used. (see TREE_USED, above.) */
4665 if (TYPE_NEEDS_CONSTRUCTING (type)
4667 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4668 && DECL_NAME (decl))
4669 TREE_USED (decl) = 0;
4670 else if (already_used)
4671 TREE_USED (decl) = 1;
4674 /* Generate a cleanup, if necessary. */
4675 cleanup = cxx_maybe_build_cleanup (decl);
4676 if (DECL_SIZE (decl) && cleanup)
4677 finish_decl_cleanup (decl, cleanup);
4680 /* DECL is a VAR_DECL for a compiler-generated variable with static
4681 storage duration (like a virtual table) whose initializer is a
4682 compile-time constant. Initialize the variable and provide it to
4686 initialize_artificial_var (tree decl, tree init)
4688 DECL_INITIAL (decl) = build_constructor (NULL_TREE, init);
4689 DECL_INITIALIZED_P (decl) = 1;
4690 determine_visibility (decl);
4691 layout_var_decl (decl);
4692 maybe_commonize_var (decl);
4693 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
4696 /* Finish processing of a declaration;
4697 install its line number and initial value.
4698 If the length of an array type is not known before,
4699 it must be determined now, from the initial value, or it is an error.
4701 INIT holds the value of an initializer that should be allowed to escape
4704 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4705 if the (init) syntax was used. */
4708 cp_finish_decl (tree decl, tree init, tree asmspec_tree, int flags)
4711 tree ttype = NULL_TREE;
4713 const char *asmspec = NULL;
4714 int was_readonly = 0;
4715 bool var_definition_p = false;
4717 if (decl == error_mark_node)
4722 error ("assignment (not initialization) in declaration");
4726 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
4728 /* Assume no cleanup is required. */
4729 cleanup = NULL_TREE;
4731 /* If a name was specified, get the string. */
4732 if (global_scope_p (current_binding_level))
4733 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
4735 asmspec = TREE_STRING_POINTER (asmspec_tree);
4737 if (init && TREE_CODE (init) == NAMESPACE_DECL)
4739 error ("cannot initialize %qD to namespace %qD", decl, init);
4743 if (current_class_type
4744 && CP_DECL_CONTEXT (decl) == current_class_type
4745 && TYPE_BEING_DEFINED (current_class_type)
4746 && (DECL_INITIAL (decl) || init))
4747 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
4749 type = TREE_TYPE (decl);
4751 if (type == error_mark_node)
4754 if (processing_template_decl)
4756 /* Add this declaration to the statement-tree. */
4757 if (at_function_scope_p ())
4758 add_decl_expr (decl);
4760 if (init && DECL_INITIAL (decl))
4761 DECL_INITIAL (decl) = init;
4762 if (TREE_CODE (decl) == VAR_DECL
4763 && !DECL_PRETTY_FUNCTION_P (decl)
4764 && !dependent_type_p (TREE_TYPE (decl)))
4765 maybe_deduce_size_from_array_init (decl, init);
4770 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4771 gcc_assert (TREE_CODE (decl) != PARM_DECL);
4773 /* Take care of TYPE_DECLs up front. */
4774 if (TREE_CODE (decl) == TYPE_DECL)
4776 if (type != error_mark_node
4777 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
4779 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
4780 warning ("shadowing previous type declaration of %q#D", decl);
4781 set_identifier_type_value (DECL_NAME (decl), decl);
4784 /* If we have installed this as the canonical typedef for this
4785 type, and that type has not been defined yet, delay emitting
4786 the debug information for it, as we will emit it later. */
4787 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
4788 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
4789 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
4791 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
4796 if (TREE_CODE (decl) != FUNCTION_DECL)
4797 ttype = target_type (type);
4800 /* A reference will be modified here, as it is initialized. */
4801 if (! DECL_EXTERNAL (decl)
4802 && TREE_READONLY (decl)
4803 && TREE_CODE (type) == REFERENCE_TYPE)
4806 TREE_READONLY (decl) = 0;
4809 if (TREE_CODE (decl) == VAR_DECL)
4811 /* Only PODs can have thread-local storage. Other types may require
4812 various kinds of non-trivial initialization. */
4813 if (DECL_THREAD_LOCAL (decl) && !pod_type_p (TREE_TYPE (decl)))
4814 error ("%qD cannot be thread-local because it has non-POD type %qT",
4815 decl, TREE_TYPE (decl));
4816 /* Convert the initializer to the type of DECL, if we have not
4817 already initialized DECL. */
4818 if (!DECL_INITIALIZED_P (decl)
4819 /* If !DECL_EXTERNAL then DECL is being defined. In the
4820 case of a static data member initialized inside the
4821 class-specifier, there can be an initializer even if DECL
4822 is *not* defined. */
4823 && (!DECL_EXTERNAL (decl) || init))
4825 init = check_initializer (decl, init, flags, &cleanup);
4826 /* Thread-local storage cannot be dynamically initialized. */
4827 if (DECL_THREAD_LOCAL (decl) && init)
4829 error ("%qD is thread-local and so cannot be dynamically "
4830 "initialized", decl);
4837 The memory occupied by any object of static storage
4838 duration is zero-initialized at program startup before
4839 any other initialization takes place.
4841 We cannot create an appropriate initializer until after
4842 the type of DECL is finalized. If DECL_INITIAL is set,
4843 then the DECL is statically initialized, and any
4844 necessary zero-initialization has already been performed. */
4845 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
4846 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
4847 /*nelts=*/NULL_TREE,
4848 /*static_storage_p=*/true);
4849 /* Remember that the initialization for this variable has
4851 DECL_INITIALIZED_P (decl) = 1;
4852 /* This declaration is the definition of this variable,
4853 unless we are initializing a static data member within
4854 the class specifier. */
4855 if (!DECL_EXTERNAL (decl))
4856 var_definition_p = true;
4857 /* The variable is being defined, so determine its
4859 determine_visibility (decl);
4861 /* If the variable has an array type, lay out the type, even if
4862 there is no initializer. It is valid to index through the
4863 array, and we must get TYPE_ALIGN set correctly on the array
4865 else if (TREE_CODE (type) == ARRAY_TYPE)
4869 /* Add this declaration to the statement-tree. This needs to happen
4870 after the call to check_initializer so that the DECL_EXPR for a
4871 reference temp is added before the DECL_EXPR for the reference itself. */
4872 if (at_function_scope_p ())
4873 add_decl_expr (decl);
4875 if (TREE_CODE (decl) == VAR_DECL)
4876 layout_var_decl (decl);
4878 /* Output the assembler code and/or RTL code for variables and functions,
4879 unless the type is an undefined structure or union.
4880 If not, it will get done when the type is completed. */
4881 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL)
4883 if (TREE_CODE (decl) == VAR_DECL)
4884 maybe_commonize_var (decl);
4886 make_rtl_for_nonlocal_decl (decl, init, asmspec);
4888 /* Check for abstractness of the type. Notice that there is no
4889 need to strip array types here since the check for those types
4890 is already done within create_array_type_for_decl. */
4891 if (TREE_CODE (type) == FUNCTION_TYPE
4892 || TREE_CODE (type) == METHOD_TYPE)
4893 abstract_virtuals_error (decl, TREE_TYPE (type));
4895 abstract_virtuals_error (decl, type);
4897 if (TREE_CODE (decl) == FUNCTION_DECL
4898 || TREE_TYPE (decl) == error_mark_node)
4899 /* No initialization required. */
4901 else if (DECL_EXTERNAL (decl)
4902 && ! (DECL_LANG_SPECIFIC (decl)
4903 && DECL_NOT_REALLY_EXTERN (decl)))
4906 DECL_INITIAL (decl) = init;
4910 /* A variable definition. */
4911 if (DECL_FUNCTION_SCOPE_P (decl))
4913 /* Initialize the local variable. */
4914 if (processing_template_decl)
4916 if (init || DECL_INITIAL (decl) == error_mark_node)
4917 DECL_INITIAL (decl) = init;
4919 else if (!TREE_STATIC (decl))
4920 initialize_local_var (decl, init);
4923 /* If a variable is defined, and then a subsequent
4924 definition with external linkage is encountered, we will
4925 get here twice for the same variable. We want to avoid
4926 calling expand_static_init more than once. For variables
4927 that are not static data members, we can call
4928 expand_static_init only when we actually process the
4929 initializer. It is not legal to redeclare a static data
4930 member, so this issue does not arise in that case. */
4931 if (var_definition_p && TREE_STATIC (decl))
4932 expand_static_init (decl, init);
4936 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
4937 reference, insert it in the statement-tree now. */
4939 push_cleanup (decl, cleanup, false);
4944 TREE_READONLY (decl) = 1;
4946 /* If this was marked 'used', be sure it will be output. */
4947 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
4948 mark_decl_referenced (decl);
4951 /* This is here for a midend callback from c-common.c. */
4954 finish_decl (tree decl, tree init, tree asmspec_tree)
4956 cp_finish_decl (decl, init, asmspec_tree, 0);
4959 /* Returns a declaration for a VAR_DECL as if:
4961 extern "C" TYPE NAME;
4963 had been seen. Used to create compiler-generated global
4967 declare_global_var (tree name, tree type)
4971 push_to_top_level ();
4972 decl = build_decl (VAR_DECL, name, type);
4973 TREE_PUBLIC (decl) = 1;
4974 DECL_EXTERNAL (decl) = 1;
4975 DECL_ARTIFICIAL (decl) = 1;
4976 /* If the user has explicitly declared this variable (perhaps
4977 because the code we are compiling is part of a low-level runtime
4978 library), then it is possible that our declaration will be merged
4979 with theirs by pushdecl. */
4980 decl = pushdecl (decl);
4981 cp_finish_decl (decl, NULL_TREE, NULL_TREE, 0);
4982 pop_from_top_level ();
4987 /* Returns a pointer to the `atexit' function. Note that if
4988 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
4989 `__cxa_atexit' function specified in the IA64 C++ ABI. */
4992 get_atexit_node (void)
5003 if (flag_use_cxa_atexit)
5005 /* The declaration for `__cxa_atexit' is:
5007 int __cxa_atexit (void (*)(void *), void *, void *)
5009 We build up the argument types and then then function type
5012 /* First, build the pointer-to-function type for the first
5014 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5015 fn_type = build_function_type (void_type_node, arg_types);
5016 fn_ptr_type = build_pointer_type (fn_type);
5017 /* Then, build the rest of the argument types. */
5018 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5019 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5020 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5021 /* And the final __cxa_atexit type. */
5022 fn_type = build_function_type (integer_type_node, arg_types);
5023 fn_ptr_type = build_pointer_type (fn_type);
5024 name = "__cxa_atexit";
5028 /* The declaration for `atexit' is:
5030 int atexit (void (*)());
5032 We build up the argument types and then then function type
5034 fn_type = build_function_type (void_type_node, void_list_node);
5035 fn_ptr_type = build_pointer_type (fn_type);
5036 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5037 /* Build the final atexit type. */
5038 fn_type = build_function_type (integer_type_node, arg_types);
5042 /* Now, build the function declaration. */
5043 push_lang_context (lang_name_c);
5044 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5045 mark_used (atexit_fndecl);
5046 pop_lang_context ();
5047 atexit_node = decay_conversion (atexit_fndecl);
5052 /* Returns the __dso_handle VAR_DECL. */
5055 get_dso_handle_node (void)
5057 if (dso_handle_node)
5058 return dso_handle_node;
5060 /* Declare the variable. */
5061 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5064 return dso_handle_node;
5067 /* Begin a new function with internal linkage whose job will be simply
5068 to destroy some particular variable. */
5070 static GTY(()) int start_cleanup_cnt;
5073 start_cleanup_fn (void)
5080 push_to_top_level ();
5082 /* No need to mangle this. */
5083 push_lang_context (lang_name_c);
5085 /* Build the parameter-types. */
5086 parmtypes = void_list_node;
5087 /* Functions passed to __cxa_atexit take an additional parameter.
5088 We'll just ignore it. After we implement the new calling
5089 convention for destructors, we can eliminate the use of
5090 additional cleanup functions entirely in the -fnew-abi case. */
5091 if (flag_use_cxa_atexit)
5092 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5093 /* Build the function type itself. */
5094 fntype = build_function_type (void_type_node, parmtypes);
5095 /* Build the name of the function. */
5096 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5097 /* Build the function declaration. */
5098 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5099 /* It's a function with internal linkage, generated by the
5101 TREE_PUBLIC (fndecl) = 0;
5102 DECL_ARTIFICIAL (fndecl) = 1;
5103 /* Make the function `inline' so that it is only emitted if it is
5104 actually needed. It is unlikely that it will be inlined, since
5105 it is only called via a function pointer, but we avoid unnecessary
5106 emissions this way. */
5107 DECL_INLINE (fndecl) = 1;
5108 DECL_DECLARED_INLINE_P (fndecl) = 1;
5109 DECL_INTERFACE_KNOWN (fndecl) = 1;
5110 /* Build the parameter. */
5111 if (flag_use_cxa_atexit)
5115 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5116 DECL_CONTEXT (parmdecl) = fndecl;
5117 TREE_USED (parmdecl) = 1;
5118 DECL_ARGUMENTS (fndecl) = parmdecl;
5122 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5124 pop_lang_context ();
5126 return current_function_decl;
5129 /* Finish the cleanup function begun by start_cleanup_fn. */
5132 end_cleanup_fn (void)
5134 expand_or_defer_fn (finish_function (0));
5136 pop_from_top_level ();
5139 /* Generate code to handle the destruction of DECL, an object with
5140 static storage duration. */
5143 register_dtor_fn (tree decl)
5150 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5151 return void_zero_node;
5153 /* Call build_cleanup before we enter the anonymous function so that
5154 any access checks will be done relative to the current scope,
5155 rather than the scope of the anonymous function. */
5156 build_cleanup (decl);
5158 /* Now start the function. */
5159 cleanup = start_cleanup_fn ();
5161 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5162 to the original function, rather than the anonymous one. That
5163 will make the back-end think that nested functions are in use,
5164 which causes confusion. */
5166 push_deferring_access_checks (dk_no_check);
5167 fcall = build_cleanup (decl);
5168 pop_deferring_access_checks ();
5170 /* Create the body of the anonymous function. */
5171 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5172 finish_expr_stmt (fcall);
5173 finish_compound_stmt (compound_stmt);
5176 /* Call atexit with the cleanup function. */
5177 cxx_mark_addressable (cleanup);
5178 mark_used (cleanup);
5179 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5180 if (flag_use_cxa_atexit)
5182 args = tree_cons (NULL_TREE,
5183 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5185 args = tree_cons (NULL_TREE, null_pointer_node, args);
5186 args = tree_cons (NULL_TREE, cleanup, args);
5189 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5190 return build_function_call (get_atexit_node (), args);
5193 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5194 is its initializer. Generate code to handle the construction
5195 and destruction of DECL. */
5198 expand_static_init (tree decl, tree init)
5200 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5201 gcc_assert (TREE_STATIC (decl));
5203 /* Some variables require no initialization. */
5205 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5206 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5209 if (DECL_FUNCTION_SCOPE_P (decl))
5211 /* Emit code to perform this initialization but once. */
5212 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5213 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5214 tree guard, guard_addr, guard_addr_list;
5215 tree acquire_fn, release_fn, abort_fn;
5218 /* Emit code to perform this initialization but once. This code
5221 static <type> guard;
5222 if (!guard.first_byte) {
5223 if (__cxa_guard_acquire (&guard)) {
5226 // Do initialization.
5227 flag = true; __cxa_guard_release (&guard);
5228 // Register variable for destruction at end of program.
5230 if (!flag) __cxa_guard_abort (&guard);
5234 Note that the `flag' variable is only set to 1 *after* the
5235 initialization is complete. This ensures that an exception,
5236 thrown during the construction, will cause the variable to
5237 reinitialized when we pass through this code again, as per:
5241 If the initialization exits by throwing an exception, the
5242 initialization is not complete, so it will be tried again
5243 the next time control enters the declaration.
5245 This process should be thread-safe, too; multiple threads
5246 should not be able to initialize the variable more than
5249 /* Create the guard variable. */
5250 guard = get_guard (decl);
5252 /* This optimization isn't safe on targets with relaxed memory
5253 consistency. On such targets we force synchronization in
5254 __cxa_guard_acquire. */
5255 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5257 /* Begin the conditional initialization. */
5258 if_stmt = begin_if_stmt ();
5259 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5260 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5263 if (flag_threadsafe_statics)
5265 guard_addr = build_address (guard);
5266 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5268 acquire_fn = get_identifier ("__cxa_guard_acquire");
5269 release_fn = get_identifier ("__cxa_guard_release");
5270 abort_fn = get_identifier ("__cxa_guard_abort");
5271 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5273 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5275 tree vfntype = build_function_type (void_type_node, argtypes);
5276 acquire_fn = push_library_fn
5277 (acquire_fn, build_function_type (integer_type_node, argtypes));
5278 release_fn = push_library_fn (release_fn, vfntype);
5279 abort_fn = push_library_fn (abort_fn, vfntype);
5283 release_fn = identifier_global_value (release_fn);
5284 abort_fn = identifier_global_value (abort_fn);
5287 inner_if_stmt = begin_if_stmt ();
5288 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5291 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5292 begin = get_target_expr (boolean_false_node);
5293 flag = TARGET_EXPR_SLOT (begin);
5295 TARGET_EXPR_CLEANUP (begin)
5296 = build (COND_EXPR, void_type_node, flag,
5298 build_call (abort_fn, guard_addr_list));
5299 CLEANUP_EH_ONLY (begin) = 1;
5301 /* Do the initialization itself. */
5302 init = add_stmt_to_compound (begin, init);
5303 init = add_stmt_to_compound
5304 (init, build (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5305 init = add_stmt_to_compound
5306 (init, build_call (release_fn, guard_addr_list));
5309 init = add_stmt_to_compound (init, set_guard (guard));
5311 /* Use atexit to register a function for destroying this static
5313 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5315 finish_expr_stmt (init);
5317 if (flag_threadsafe_statics)
5319 finish_compound_stmt (inner_then_clause);
5320 finish_then_clause (inner_if_stmt);
5321 finish_if_stmt (inner_if_stmt);
5324 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5326 finish_compound_stmt (then_clause);
5327 finish_then_clause (if_stmt);
5328 finish_if_stmt (if_stmt);
5332 static_aggregates = tree_cons (init, decl, static_aggregates);
5336 /* Make TYPE a complete type based on INITIAL_VALUE.
5337 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5338 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5341 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5344 tree type, elt_type;
5348 /* An array of character type can be initialized from a
5349 brace-enclosed string constant. */
5350 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5351 && TREE_CODE (initial_value) == CONSTRUCTOR
5352 && CONSTRUCTOR_ELTS (initial_value)
5353 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value)))
5355 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value)) == NULL_TREE)
5356 initial_value = TREE_VALUE (CONSTRUCTOR_ELTS (initial_value));
5359 failure = complete_array_type (ptype, initial_value, do_default);
5361 /* We can create the array before the element type is complete, which
5362 means that we didn't have these two bits set in the original type
5363 either. In completing the type, we are expected to propagate these
5364 bits. See also complete_type which does the same thing for arrays
5367 if (TYPE_DOMAIN (type))
5369 elt_type = TREE_TYPE (type);
5370 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5371 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5372 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5378 /* Return zero if something is declared to be a member of type
5379 CTYPE when in the context of CUR_TYPE. STRING is the error
5380 message to print in that case. Otherwise, quietly return 1. */
5383 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5385 if (ctype && ctype != cur_type)
5387 if (flags == DTOR_FLAG)
5388 error ("destructor for alien class %qT cannot be a member", ctype);
5390 error ("constructor for alien class %qT cannot be a member", ctype);
5396 /* Subroutine of `grokdeclarator'. */
5398 /* Generate errors possibly applicable for a given set of specifiers.
5399 This is for ARM $7.1.2. */
5402 bad_specifiers (tree object,
5411 error ("%qD declared as a %<virtual%> %s", object, type);
5413 error ("%qD declared as an %<inline%> %s", object, type);
5415 error ("%<const%> and %<volatile%> function specifiers on "
5416 "%qD invalid in %s declaration",
5419 cp_error_at ("%qD declared as a friend", object);
5421 && (TREE_CODE (object) == TYPE_DECL
5422 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5423 && !TYPE_REFFN_P (TREE_TYPE (object))
5424 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5425 cp_error_at ("%qD declared with an exception specification", object);
5428 /* CTYPE is class type, or null if non-class.
5429 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5431 DECLARATOR is the function's name.
5432 PARMS is a chain of PARM_DECLs for the function.
5433 VIRTUALP is truthvalue of whether the function is virtual or not.
5434 FLAGS are to be passed through to `grokclassfn'.
5435 QUALS are qualifiers indicating whether the function is `const'
5437 RAISES is a list of exceptions that this function can raise.
5438 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5439 not look, and -1 if we should not call `grokclassfn' at all.
5441 SFK is the kind of special function (if any) for the new function.
5443 Returns `NULL_TREE' if something goes wrong, after issuing
5444 applicable error messages. */
5447 grokfndecl (tree ctype,
5451 tree orig_declarator,
5453 enum overload_flags flags,
5460 special_function_kind sfk,
5467 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5468 int has_default_arg = 0;
5472 type = build_exception_variant (type, raises);
5474 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5475 DECL_ARGUMENTS (decl) = parms;
5476 /* Propagate volatile out from type to decl. */
5477 if (TYPE_VOLATILE (type))
5478 TREE_THIS_VOLATILE (decl) = 1;
5480 /* If this decl has namespace scope, set that up. */
5482 set_decl_namespace (decl, in_namespace, friendp);
5484 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5486 /* `main' and builtins have implicit 'C' linkage. */
5487 if ((MAIN_NAME_P (declarator)
5488 || (IDENTIFIER_LENGTH (declarator) > 10
5489 && IDENTIFIER_POINTER (declarator)[0] == '_'
5490 && IDENTIFIER_POINTER (declarator)[1] == '_'
5491 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5492 && current_lang_name == lang_name_cplusplus
5493 && ctype == NULL_TREE
5494 /* NULL_TREE means global namespace. */
5495 && DECL_CONTEXT (decl) == NULL_TREE)
5496 SET_DECL_LANGUAGE (decl, lang_c);
5498 /* Should probably propagate const out from type to decl I bet (mrs). */
5501 DECL_STATIC_FUNCTION_P (decl) = 1;
5502 DECL_CONTEXT (decl) = ctype;
5506 DECL_CONTEXT (decl) = ctype;
5508 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
5510 if (processing_template_decl)
5511 error ("cannot declare %<::main%> to be a template");
5513 error ("cannot declare %<::main%> to be inline");
5515 error ("cannot declare %<::main%> to be static");
5516 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
5519 error ("%<::main%> must return %<int%>");
5520 TREE_TYPE (TREE_TYPE (decl)) = integer_type_node;
5526 /* Members of anonymous types and local classes have no linkage; make
5527 them internal. If a typedef is made later, this will be changed. */
5528 if (ctype && (TYPE_ANONYMOUS_P (ctype)
5529 || decl_function_context (TYPE_MAIN_DECL (ctype))))
5534 /* [basic.link]: A name with no linkage (notably, the name of a class
5535 or enumeration declared in a local scope) shall not be used to
5536 declare an entity with linkage.
5538 Only check this for public decls for now. See core 319, 389. */
5539 t = no_linkage_check (TREE_TYPE (decl),
5540 /*relaxed_p=*/false);
5543 if (TYPE_ANONYMOUS_P (t))
5545 if (DECL_EXTERN_C_P (decl))
5546 /* Allow this; it's pretty common in C. */;
5549 pedwarn ("non-local function %q#D uses anonymous type",
5551 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5552 cp_pedwarn_at ("%q#D does not refer to the unqualified "
5553 "type, so it is not used for linkage",
5558 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
5562 TREE_PUBLIC (decl) = publicp;
5565 DECL_INTERFACE_KNOWN (decl) = 1;
5566 DECL_NOT_REALLY_EXTERN (decl) = 1;
5569 /* If the declaration was declared inline, mark it as such. */
5571 DECL_DECLARED_INLINE_P (decl) = 1;
5572 /* We inline functions that are explicitly declared inline, or, when
5573 the user explicitly asks us to, all functions. */
5574 if (DECL_DECLARED_INLINE_P (decl)
5575 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
5576 DECL_INLINE (decl) = 1;
5578 DECL_EXTERNAL (decl) = 1;
5579 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
5581 error ("%smember function %qD cannot have cv-qualifier",
5582 (ctype ? "static " : "non-"), decl);
5583 quals = TYPE_UNQUALIFIED;
5586 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
5587 grok_op_properties (decl, friendp, /*complain=*/true);
5589 if (ctype && decl_function_context (decl))
5590 DECL_NO_STATIC_CHAIN (decl) = 1;
5592 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5593 if (TREE_PURPOSE (t)
5594 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5596 has_default_arg = 1;
5601 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5605 ("defining explicit specialization %qD in friend declaration",
5609 tree fns = TREE_OPERAND (orig_declarator, 0);
5610 tree args = TREE_OPERAND (orig_declarator, 1);
5612 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5614 /* Something like `template <class T> friend void f<T>()'. */
5615 error ("invalid use of template-id %qD in declaration "
5616 "of primary template",
5622 /* A friend declaration of the form friend void f<>(). Record
5623 the information in the TEMPLATE_ID_EXPR. */
5624 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5626 if (TREE_CODE (fns) == COMPONENT_REF)
5628 /* Due to bison parser ickiness, we will have already looked
5629 up an operator_name or PFUNCNAME within the current class
5630 (see template_id in parse.y). If the current class contains
5631 such a name, we'll get a COMPONENT_REF here. Undo that. */
5633 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5634 == current_class_type);
5635 fns = TREE_OPERAND (fns, 1);
5637 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5638 || TREE_CODE (fns) == OVERLOAD);
5639 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5641 if (has_default_arg)
5643 error ("default arguments are not allowed in declaration "
5644 "of friend template specialization %qD",
5651 error ("%<inline%> is not allowed in declaration of friend "
5652 "template specialization %qD",
5660 /* Make the init_value nonzero so pushdecl knows this is not
5661 tentative. error_mark_node is replaced later with the BLOCK. */
5662 DECL_INITIAL (decl) = error_mark_node;
5664 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
5665 TREE_NOTHROW (decl) = 1;
5667 /* Caller will do the rest of this. */
5671 if (ctype != NULL_TREE)
5673 if (sfk == sfk_constructor)
5674 DECL_CONSTRUCTOR_P (decl) = 1;
5676 grokclassfn (ctype, decl, flags, quals);
5679 decl = check_explicit_specialization (orig_declarator, decl,
5681 2 * (funcdef_flag != 0) +
5682 4 * (friendp != 0));
5683 if (decl == error_mark_node)
5688 cplus_decl_attributes (&decl, *attrlist, 0);
5689 *attrlist = NULL_TREE;
5692 if (ctype != NULL_TREE
5693 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
5698 old_decl = check_classfn (ctype, decl,
5699 (processing_template_decl
5700 > template_class_depth (ctype))
5701 ? current_template_parms
5704 if (old_decl && TREE_CODE (old_decl) == TEMPLATE_DECL)
5705 /* Because grokfndecl is always supposed to return a
5706 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5707 here. We depend on our callers to figure out that its
5708 really a template that's being returned. */
5709 old_decl = DECL_TEMPLATE_RESULT (old_decl);
5711 if (old_decl && DECL_STATIC_FUNCTION_P (old_decl)
5712 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
5713 /* Remove the `this' parm added by grokclassfn.
5714 XXX Isn't this done in start_function, too? */
5715 revert_static_member_fn (decl);
5716 if (old_decl && DECL_ARTIFICIAL (old_decl))
5717 error ("definition of implicitly-declared %qD", old_decl);
5724 /* Since we've smashed OLD_DECL to its
5725 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5726 if (TREE_CODE (decl) == TEMPLATE_DECL)
5727 decl = DECL_TEMPLATE_RESULT (decl);
5729 /* Attempt to merge the declarations. This can fail, in
5730 the case of some invalid specialization declarations. */
5731 pushed_scope = push_scope (ctype);
5732 ok = duplicate_decls (decl, old_decl);
5734 pop_scope (pushed_scope);
5737 error ("no %q#D member function declared in class %qT",
5745 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
5748 if (ctype == NULL_TREE || check)
5752 DECL_VIRTUAL_P (decl) = 1;
5757 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
5758 the linkage that DECL will receive in the object file. */
5761 set_linkage_for_static_data_member (tree decl)
5763 /* A static data member always has static storage duration and
5764 external linkage. Note that static data members are forbidden in
5765 local classes -- the only situation in which a class has
5766 non-external linkage. */
5767 TREE_PUBLIC (decl) = 1;
5768 TREE_STATIC (decl) = 1;
5769 /* For non-template classes, static data members are always put
5770 out in exactly those files where they are defined, just as
5771 with ordinary namespace-scope variables. */
5772 if (!processing_template_decl)
5773 DECL_INTERFACE_KNOWN (decl) = 1;
5776 /* Create a VAR_DECL named NAME with the indicated TYPE.
5778 If SCOPE is non-NULL, it is the class type or namespace containing
5779 the variable. If SCOPE is NULL, the variable should is created in
5780 the innermost enclosings scope. */
5783 grokvardecl (tree type,
5785 const cp_decl_specifier_seq *declspecs,
5791 tree explicit_scope;
5793 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
5795 /* Compute the scope in which to place the variable, but remember
5796 whether or not that scope was explicitly specified by the user. */
5797 explicit_scope = scope;
5800 /* An explicit "extern" specifier indicates a namespace-scope
5802 if (declspecs->storage_class == sc_extern)
5803 scope = current_namespace;
5804 else if (!at_function_scope_p ())
5805 scope = current_scope ();
5809 && (/* If the variable is a namespace-scope variable declared in a
5810 template, we need DECL_LANG_SPECIFIC. */
5811 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
5812 /* Similarly for namespace-scope variables with language linkage
5814 || (TREE_CODE (scope) == NAMESPACE_DECL
5815 && current_lang_name != lang_name_cplusplus)
5816 /* Similarly for static data members. */
5818 decl = build_lang_decl (VAR_DECL, name, type);
5820 decl = build_decl (VAR_DECL, name, type);
5822 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
5823 set_decl_namespace (decl, explicit_scope, 0);
5825 DECL_CONTEXT (decl) = scope;
5827 if (declspecs->storage_class == sc_extern)
5829 DECL_THIS_EXTERN (decl) = 1;
5830 DECL_EXTERNAL (decl) = !initialized;
5833 if (DECL_CLASS_SCOPE_P (decl))
5835 set_linkage_for_static_data_member (decl);
5836 /* This function is only called with out-of-class definitions. */
5837 DECL_EXTERNAL (decl) = 0;
5839 /* At top level, either `static' or no s.c. makes a definition
5840 (perhaps tentative), and absence of `static' makes it public. */
5841 else if (toplevel_bindings_p ())
5843 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
5844 && (DECL_THIS_EXTERN (decl) || ! constp));
5845 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
5847 /* Not at top level, only `static' makes a static definition. */
5850 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
5851 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
5854 if (declspecs->specs[(int)ds_thread])
5856 if (targetm.have_tls)
5857 DECL_THREAD_LOCAL (decl) = 1;
5859 /* A mere warning is sure to result in improper semantics
5860 at runtime. Don't bother to allow this to compile. */
5861 error ("thread-local storage not supported for this target");
5864 if (TREE_PUBLIC (decl))
5866 /* [basic.link]: A name with no linkage (notably, the name of a class
5867 or enumeration declared in a local scope) shall not be used to
5868 declare an entity with linkage.
5870 Only check this for public decls for now. */
5871 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
5874 if (TYPE_ANONYMOUS_P (t))
5876 if (DECL_EXTERN_C_P (decl))
5877 /* Allow this; it's pretty common in C. */
5881 /* DRs 132, 319 and 389 seem to indicate types with
5882 no linkage can only be used to declare extern "C"
5883 entities. Since it's not always an error in the
5884 ISO C++ 90 Standard, we only issue a warning. */
5885 warning ("non-local variable %q#D uses anonymous type",
5887 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5888 cp_warning_at ("%q#D does not refer to the unqualified "
5889 "type, so it is not used for linkage",
5894 warning ("non-local variable %q#D uses local type %qT", decl, t);
5898 DECL_INTERFACE_KNOWN (decl) = 1;
5903 /* Create and return a canonical pointer to member function type, for
5904 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
5907 build_ptrmemfunc_type (tree type)
5911 tree unqualified_variant = NULL_TREE;
5913 if (type == error_mark_node)
5916 /* If a canonical type already exists for this type, use it. We use
5917 this method instead of type_hash_canon, because it only does a
5918 simple equality check on the list of field members. */
5920 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
5923 /* Make sure that we always have the unqualified pointer-to-member
5925 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
5927 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
5929 t = make_aggr_type (RECORD_TYPE);
5930 xref_basetypes (t, NULL_TREE);
5932 /* Let the front-end know this is a pointer to member function... */
5933 TYPE_PTRMEMFUNC_FLAG (t) = 1;
5934 /* ... and not really an aggregate. */
5935 SET_IS_AGGR_TYPE (t, 0);
5937 field = build_decl (FIELD_DECL, pfn_identifier, type);
5940 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
5941 TREE_CHAIN (field) = fields;
5944 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
5946 /* Zap out the name so that the back-end will give us the debugging
5947 information for this anonymous RECORD_TYPE. */
5948 TYPE_NAME (t) = NULL_TREE;
5950 /* If this is not the unqualified form of this pointer-to-member
5951 type, set the TYPE_MAIN_VARIANT for this type to be the
5952 unqualified type. Since they are actually RECORD_TYPEs that are
5953 not variants of each other, we must do this manually. */
5954 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
5956 t = build_qualified_type (t, cp_type_quals (type));
5957 TYPE_MAIN_VARIANT (t) = unqualified_variant;
5958 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
5959 TYPE_NEXT_VARIANT (unqualified_variant) = t;
5962 /* Cache this pointer-to-member type so that we can find it again
5964 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
5969 /* Create and return a pointer to data member type. */
5972 build_ptrmem_type (tree class_type, tree member_type)
5974 if (TREE_CODE (member_type) == METHOD_TYPE)
5978 arg_types = TYPE_ARG_TYPES (member_type);
5979 class_type = (cp_build_qualified_type
5981 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
5983 = build_method_type_directly (class_type,
5984 TREE_TYPE (member_type),
5985 TREE_CHAIN (arg_types));
5986 return build_ptrmemfunc_type (build_pointer_type (member_type));
5990 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
5991 return build_offset_type (class_type, member_type);
5995 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
5996 Check to see that the definition is valid. Issue appropriate error
5997 messages. Return 1 if the definition is particularly bad, or 0
6001 check_static_variable_definition (tree decl, tree type)
6003 /* Motion 10 at San Diego: If a static const integral data member is
6004 initialized with an integral constant expression, the initializer
6005 may appear either in the declaration (within the class), or in
6006 the definition, but not both. If it appears in the class, the
6007 member is a member constant. The file-scope definition is always
6009 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6011 error ("invalid in-class initialization of static data member "
6012 "of non-integral type %qT",
6014 /* If we just return the declaration, crashes will sometimes
6015 occur. We therefore return void_type_node, as if this were a
6016 friend declaration, to cause callers to completely ignore
6017 this declaration. */
6020 else if (!CP_TYPE_CONST_P (type))
6021 error ("ISO C++ forbids in-class initialization of non-const "
6022 "static member %qD",
6024 else if (pedantic && !INTEGRAL_TYPE_P (type))
6025 pedwarn ("ISO C++ forbids initialization of member constant "
6026 "%qD of non-integral type %qT", decl, type);
6031 /* Given the SIZE (i.e., number of elements) in an array, compute an
6032 appropriate index type for the array. If non-NULL, NAME is the
6033 name of the thing being declared. */
6036 compute_array_index_type (tree name, tree size)
6038 tree type = TREE_TYPE (size);
6041 /* The array bound must be an integer type. */
6042 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6045 error ("size of array %qD has non-integral type %qT", name, type);
6047 error ("size of array has non-integral type %qT", type);
6048 size = integer_one_node;
6049 type = TREE_TYPE (size);
6052 if (abi_version_at_least (2)
6053 /* We should only handle value dependent expressions specially. */
6054 ? value_dependent_expression_p (size)
6055 /* But for abi-1, we handled all instances in templates. This
6056 effects the manglings produced. */
6057 : processing_template_decl)
6058 return build_index_type (build_min (MINUS_EXPR, sizetype,
6059 size, integer_one_node));
6061 /* The size might be the result of a cast. */
6062 STRIP_TYPE_NOPS (size);
6064 /* It might be a const variable or enumeration constant. */
6065 size = integral_constant_value (size);
6067 /* Normally, the array-bound will be a constant. */
6068 if (TREE_CODE (size) == INTEGER_CST)
6070 /* Check to see if the array bound overflowed. Make that an
6071 error, no matter how generous we're being. */
6072 int old_flag_pedantic_errors = flag_pedantic_errors;
6073 int old_pedantic = pedantic;
6074 pedantic = flag_pedantic_errors = 1;
6075 constant_expression_warning (size);
6076 pedantic = old_pedantic;
6077 flag_pedantic_errors = old_flag_pedantic_errors;
6079 /* An array must have a positive number of elements. */
6080 if (INT_CST_LT (size, integer_zero_node))
6083 error ("size of array %qD is negative", name);
6085 error ("size of array is negative");
6086 size = integer_one_node;
6088 /* As an extension we allow zero-sized arrays. We always allow
6089 them in system headers because glibc uses them. */
6090 else if (integer_zerop (size) && pedantic && !in_system_header)
6093 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6095 pedwarn ("ISO C++ forbids zero-size array");
6098 else if (TREE_CONSTANT (size))
6100 /* `(int) &fn' is not a valid array bound. */
6102 error ("size of array %qD is not an integral constant-expression",
6105 error ("size of array is not an integral constant-expression");
6110 pedwarn ("ISO C++ forbids variable-size array %qD", name);
6112 pedwarn ("ISO C++ forbids variable-size array");
6115 if (processing_template_decl && !TREE_CONSTANT (size))
6116 /* A variable sized array. */
6117 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6120 HOST_WIDE_INT saved_processing_template_decl;
6122 /* Compute the index of the largest element in the array. It is
6123 one less than the number of elements in the array. We save
6124 and restore PROCESSING_TEMPLATE_DECL so that computations in
6125 cp_build_binary_op will be appropriately folded. */
6126 saved_processing_template_decl = processing_template_decl;
6127 processing_template_decl = 0;
6128 itype = cp_build_binary_op (MINUS_EXPR,
6129 cp_convert (ssizetype, size),
6130 cp_convert (ssizetype, integer_one_node));
6131 itype = fold (itype);
6132 processing_template_decl = saved_processing_template_decl;
6134 if (!TREE_CONSTANT (itype))
6135 /* A variable sized array. */
6136 itype = variable_size (itype);
6137 /* Make sure that there was no overflow when creating to a signed
6138 index type. (For example, on a 32-bit machine, an array with
6139 size 2^32 - 1 is too big.) */
6140 else if (TREE_OVERFLOW (itype))
6142 error ("overflow in array dimension");
6143 TREE_OVERFLOW (itype) = 0;
6147 /* Create and return the appropriate index type. */
6148 return build_index_type (itype);
6151 /* Returns the scope (if any) in which the entity declared by
6152 DECLARATOR will be located. If the entity was declared with an
6153 unqualified name, NULL_TREE is returned. */
6156 get_scope_of_declarator (const cp_declarator *declarator)
6158 while (declarator && declarator->kind != cdk_id)
6159 declarator = declarator->declarator;
6161 /* If the declarator-id is a SCOPE_REF, the scope in which the
6162 declaration occurs is the first operand. */
6164 && declarator->u.id.qualifying_scope)
6165 return declarator->u.id.qualifying_scope;
6167 /* Otherwise, the declarator is not a qualified name; the entity will
6168 be declared in the current scope. */
6172 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6173 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6177 create_array_type_for_decl (tree name, tree type, tree size)
6179 tree itype = NULL_TREE;
6180 const char* error_msg;
6182 /* If things have already gone awry, bail now. */
6183 if (type == error_mark_node || size == error_mark_node)
6184 return error_mark_node;
6186 /* Assume that everything will go OK. */
6189 /* There are some types which cannot be array elements. */
6190 switch (TREE_CODE (type))
6193 error_msg = "array of void";
6197 error_msg = "array of functions";
6200 case REFERENCE_TYPE:
6201 error_msg = "array of references";
6205 error_msg = "array of function members";
6212 /* If something went wrong, issue an error-message and return. */
6216 error ("declaration of %qD as %s", name, error_msg);
6218 error ("creating %s", error_msg);
6220 return error_mark_node;
6225 The constant expressions that specify the bounds of the arrays
6226 can be omitted only for the first member of the sequence. */
6227 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6230 error ("declaration of %qD as multidimensional array must "
6231 "have bounds for all dimensions except the first",
6234 error ("multidimensional array must have bounds for all "
6235 "dimensions except the first");
6237 return error_mark_node;
6240 /* Figure out the index type for the array. */
6242 itype = compute_array_index_type (name, size);
6245 T is called the array element type; this type shall not be [...] an
6246 abstract class type. */
6247 abstract_virtuals_error (name, type);
6249 return build_cplus_array_type (type, itype);
6252 /* Check that it's OK to declare a function with the indicated TYPE.
6253 SFK indicates the kind of special function (if any) that this
6254 function is. OPTYPE is the type given in a conversion operator
6255 declaration, or the class type for a constructor/destructor.
6256 Returns the actual return type of the function; that
6257 may be different than TYPE if an error occurs, or for certain
6258 special functions. */
6261 check_special_function_return_type (special_function_kind sfk,
6267 case sfk_constructor:
6269 error ("return type specification for constructor invalid");
6271 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6272 type = build_pointer_type (optype);
6274 type = void_type_node;
6277 case sfk_destructor:
6279 error ("return type specification for destructor invalid");
6280 /* We can't use the proper return type here because we run into
6281 problems with ambiguous bases and covariant returns.
6282 Java classes are left unchanged because (void *) isn't a valid
6283 Java type, and we don't want to change the Java ABI. */
6284 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6285 type = build_pointer_type (void_type_node);
6287 type = void_type_node;
6290 case sfk_conversion:
6291 if (type && !same_type_p (type, optype))
6292 error ("operator %qT declared to return %qT", optype, type);
6294 pedwarn ("return type specified for %<operator %T%>", optype);
6305 /* A variable or data member (whose unqualified name is IDENTIFIER)
6306 has been declared with the indicated TYPE. If the TYPE is not
6307 acceptable, issue an error message and return a type to use for
6308 error-recovery purposes. */
6311 check_var_type (tree identifier, tree type)
6313 if (VOID_TYPE_P (type))
6316 error ("unnamed variable or field declared void");
6317 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6319 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6320 error ("variable or field %qE declared void", identifier);
6323 error ("variable or field declared void");
6324 type = integer_type_node;
6330 /* Given declspecs and a declarator (abstract or otherwise), determine
6331 the name and type of the object declared and construct a DECL node
6334 DECLSPECS is a chain of tree_list nodes whose value fields
6335 are the storage classes and type specifiers.
6337 DECL_CONTEXT says which syntactic context this declaration is in:
6338 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6339 FUNCDEF for a function definition. Like NORMAL but a few different
6340 error messages in each case. Return value may be zero meaning
6341 this definition is too screwy to try to parse.
6342 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6343 handle member functions (which have FIELD context).
6344 Return value may be zero meaning this definition is too screwy to
6346 PARM for a parameter declaration (either within a function prototype
6347 or before a function body). Make a PARM_DECL, or return void_type_node.
6348 CATCHPARM for a parameter declaration before a catch clause.
6349 TYPENAME if for a typename (in a cast or sizeof).
6350 Don't make a DECL node; just return the ..._TYPE node.
6351 FIELD for a struct or union field; make a FIELD_DECL.
6352 BITFIELD for a field with specified width.
6353 INITIALIZED is 1 if the decl has an initializer.
6355 ATTRLIST is a pointer to the list of attributes, which may be NULL
6356 if there are none; *ATTRLIST may be modified if attributes from inside
6357 the declarator should be applied to the declaration.
6359 When this function is called, scoping variables (such as
6360 CURRENT_CLASS_TYPE) should reflect the scope in which the
6361 declaration occurs, not the scope in which the new declaration will
6362 be placed. For example, on:
6366 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6367 should not be `S'. */
6370 grokdeclarator (const cp_declarator *declarator,
6371 const cp_decl_specifier_seq *declspecs,
6372 enum decl_context decl_context,
6376 tree type = NULL_TREE;
6379 int virtualp, explicitp, friendp, inlinep, staticp;
6380 int explicit_int = 0;
6381 int explicit_char = 0;
6382 int defaulted_int = 0;
6383 tree dependant_name = NULL_TREE;
6385 tree typedef_decl = NULL_TREE;
6386 const char *name = NULL;
6387 tree typedef_type = NULL_TREE;
6388 int funcdef_flag = 0;
6389 cp_declarator_kind innermost_code = cdk_error;
6392 /* See the code below that used this. */
6393 tree decl_attr = NULL_TREE;
6396 /* Keep track of what sort of function is being processed
6397 so that we can warn about default return values, or explicit
6398 return values which do not match prescribed defaults. */
6399 special_function_kind sfk = sfk_none;
6401 tree dname = NULL_TREE;
6402 tree ctor_return_type = NULL_TREE;
6403 enum overload_flags flags = NO_SPECIAL;
6404 cp_cv_quals quals = TYPE_UNQUALIFIED;
6405 tree raises = NULL_TREE;
6406 int template_count = 0;
6407 tree returned_attrs = NULL_TREE;
6408 tree parms = NULL_TREE;
6409 const cp_declarator *id_declarator;
6410 /* The unqualified name of the declarator; either an
6411 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6412 tree unqualified_id;
6413 /* The class type, if any, in which this entity is located,
6414 or NULL_TREE if none. Note that this value may be different from
6415 the current class type; for example if an attempt is made to declare
6416 "A::f" inside "B", this value will be "A". */
6417 tree ctype = current_class_type;
6418 /* The NAMESPACE_DECL for the namespace in which this entity is
6419 located. If an unqualified name is used to declare the entity,
6420 this value will be NULL_TREE, even if the entity is located at
6422 tree in_namespace = NULL_TREE;
6424 cp_storage_class storage_class;
6425 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6426 bool type_was_error_mark_node = false;
6428 signed_p = declspecs->specs[(int)ds_signed];
6429 unsigned_p = declspecs->specs[(int)ds_unsigned];
6430 short_p = declspecs->specs[(int)ds_short];
6431 long_p = declspecs->specs[(int)ds_long];
6432 thread_p = declspecs->specs[(int)ds_thread];
6434 if (decl_context == FUNCDEF)
6435 funcdef_flag = 1, decl_context = NORMAL;
6436 else if (decl_context == MEMFUNCDEF)
6437 funcdef_flag = -1, decl_context = FIELD;
6438 else if (decl_context == BITFIELD)
6439 bitfield = 1, decl_context = FIELD;
6441 /* Look inside a declarator for the name being declared
6442 and get it as a string, for an error message. */
6443 for (id_declarator = declarator;
6445 id_declarator = id_declarator->declarator)
6447 if (id_declarator->kind != cdk_id)
6448 innermost_code = id_declarator->kind;
6450 switch (id_declarator->kind)
6453 if (id_declarator->declarator
6454 && id_declarator->declarator->kind == cdk_id)
6456 sfk = id_declarator->declarator->u.id.sfk;
6457 if (sfk == sfk_destructor)
6464 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
6465 tree decl = id_declarator->u.id.unqualified_name;
6468 if (qualifying_scope)
6470 if (TYPE_P (qualifying_scope))
6472 ctype = qualifying_scope;
6473 if (innermost_code != cdk_function
6474 && current_class_type
6475 && !UNIQUELY_DERIVED_FROM_P (ctype,
6476 current_class_type))
6478 error ("type %qT is not derived from type %qT",
6479 ctype, current_class_type);
6480 return error_mark_node;
6483 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6484 in_namespace = qualifying_scope;
6486 if (TREE_CODE (decl) == BASELINK)
6487 decl = BASELINK_FUNCTIONS (decl);
6488 if (decl == error_mark_node)
6489 return error_mark_node;
6490 switch (TREE_CODE (decl))
6496 if (innermost_code != cdk_function)
6498 error ("declaration of %qD as non-function", decl);
6499 return error_mark_node;
6501 else if (!qualifying_scope
6502 && !(current_class_type && at_class_scope_p ()))
6504 error ("declaration of %qD as non-member", decl);
6505 return error_mark_node;
6508 type = TREE_OPERAND (decl, 0);
6509 name = IDENTIFIER_POINTER (constructor_name (type));
6513 case TEMPLATE_ID_EXPR:
6515 tree fns = TREE_OPERAND (decl, 0);
6518 if (TREE_CODE (dname) == COMPONENT_REF)
6519 dname = TREE_OPERAND (dname, 1);
6520 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6522 gcc_assert (is_overloaded_fn (dname));
6523 dname = DECL_NAME (get_first_fn (dname));
6528 case IDENTIFIER_NODE:
6529 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6532 if (C_IS_RESERVED_WORD (dname))
6534 error ("declarator-id missing; using reserved word %qD",
6536 name = IDENTIFIER_POINTER (dname);
6538 else if (!IDENTIFIER_TYPENAME_P (dname))
6539 name = IDENTIFIER_POINTER (dname);
6542 gcc_assert (flags == NO_SPECIAL);
6543 flags = TYPENAME_FLAG;
6544 ctor_return_type = TREE_TYPE (dname);
6545 sfk = sfk_conversion;
6546 if (is_typename_at_global_scope (dname))
6547 name = IDENTIFIER_POINTER (dname);
6549 name = "<invalid operator>";
6554 dname = constructor_name (TREE_TYPE (decl));
6555 name = IDENTIFIER_POINTER (dname);
6576 if (id_declarator->kind == cdk_id)
6580 /* A function definition's declarator must have the form of
6581 a function declarator. */
6583 if (funcdef_flag && innermost_code != cdk_function)
6586 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
6587 && innermost_code != cdk_function
6588 && ! (ctype && !declspecs->any_specifiers_p))
6590 error ("declaration of %qD as non-function", dname);
6591 return error_mark_node;
6594 /* Anything declared one level down from the top level
6595 must be one of the parameters of a function
6596 (because the body is at least two levels down). */
6598 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6599 by not allowing C++ class definitions to specify their parameters
6600 with xdecls (must be spec.d in the parmlist).
6602 Since we now wait to push a class scope until we are sure that
6603 we are in a legitimate method context, we must set oldcname
6604 explicitly (since current_class_name is not yet alive).
6606 We also want to avoid calling this a PARM if it is in a namespace. */
6608 if (decl_context == NORMAL && !toplevel_bindings_p ())
6610 struct cp_binding_level *b = current_binding_level;
6611 current_binding_level = b->level_chain;
6612 if (current_binding_level != 0 && toplevel_bindings_p ())
6613 decl_context = PARM;
6614 current_binding_level = b;
6618 name = decl_context == PARM ? "parameter" : "type name";
6620 /* If there were multiple types specified in the decl-specifier-seq,
6621 issue an error message. */
6622 if (declspecs->multiple_types_p)
6623 error ("two or more data types in declaration of %qs", name);
6624 /* Extract the basic type from the decl-specifier-seq. */
6625 type = declspecs->type;
6626 if (type == error_mark_node)
6629 type_was_error_mark_node = true;
6631 /* If the entire declaration is itself tagged as deprecated then
6632 suppress reports of deprecated items. */
6633 if (type && TREE_DEPRECATED (type)
6634 && deprecated_state != DEPRECATED_SUPPRESS)
6635 warn_deprecated_use (type);
6636 if (type && TREE_CODE (type) == TYPE_DECL)
6638 typedef_decl = type;
6639 type = TREE_TYPE (typedef_decl);
6641 /* No type at all: default to `int', and set DEFAULTED_INT
6642 because it was not a user-defined typedef. */
6643 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
6645 /* These imply 'int'. */
6646 type = integer_type_node;
6650 explicit_int = declspecs->explicit_int_p;
6651 explicit_char = declspecs->explicit_char_p;
6653 /* Check for repeated decl-specifiers. */
6654 for (ds = ds_first; ds != ds_last; ++ds)
6656 unsigned count = declspecs->specs[(int)ds];
6659 /* The "long" specifier is a special case because of
6664 error ("%<long long long%> is too long for GCC");
6665 else if (pedantic && !in_system_header && warn_long_long)
6666 pedwarn ("ISO C++ does not support %<long long%>");
6670 else if (declspecs->specs[(int)ds] > 1)
6672 static const char *const decl_spec_names[] = {
6688 error ("duplicate %qs", decl_spec_names[(int)ds]);
6693 /* See the code below that used this. */
6695 decl_attr = DECL_ATTRIBUTES (typedef_decl);
6697 typedef_type = type;
6700 if (sfk != sfk_conversion)
6701 ctor_return_type = ctype;
6703 if (sfk != sfk_none)
6704 type = check_special_function_return_type (sfk, type,
6706 else if (type == NULL_TREE)
6712 /* We handle `main' specially here, because 'main () { }' is so
6713 common. With no options, it is allowed. With -Wreturn-type,
6714 it is a warning. It is only an error with -pedantic-errors. */
6715 is_main = (funcdef_flag
6716 && dname && MAIN_NAME_P (dname)
6717 && ctype == NULL_TREE
6718 && in_namespace == NULL_TREE
6719 && current_namespace == global_namespace);
6721 if (type_was_error_mark_node)
6722 /* We've already issued an error, don't complain more. */;
6723 else if (in_system_header || flag_ms_extensions)
6724 /* Allow it, sigh. */;
6725 else if (pedantic || ! is_main)
6726 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
6727 else if (warn_return_type)
6728 warning ("ISO C++ forbids declaration of %qs with no type", name);
6730 type = integer_type_node;
6735 /* Now process the modifiers that were specified
6736 and check for invalid combinations. */
6738 /* Long double is a special combination. */
6739 if (long_p && TYPE_MAIN_VARIANT (type) == double_type_node)
6742 type = build_qualified_type (long_double_type_node,
6743 cp_type_quals (type));
6746 /* Check all other uses of type modifiers. */
6748 if (unsigned_p || signed_p || long_p || short_p)
6752 if (TREE_CODE (type) == REAL_TYPE)
6753 error ("short, signed or unsigned invalid for %qs", name);
6754 else if (TREE_CODE (type) != INTEGER_TYPE)
6755 error ("long, short, signed or unsigned invalid for %qs", name);
6756 else if (long_p && short_p)
6757 error ("long and short specified together for %qs", name);
6758 else if ((long_p || short_p) && explicit_char)
6759 error ("long or short specified with char for %qs", name);
6760 else if ((long_p|| short_p) && TREE_CODE (type) == REAL_TYPE)
6761 error ("long or short specified with floating type for %qs", name);
6762 else if (signed_p && unsigned_p)
6763 error ("signed and unsigned given together for %qs", name);
6767 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
6769 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
6771 if (flag_pedantic_errors)
6776 /* Discard the type modifiers if they are invalid. */
6787 /* Decide whether an integer type is signed or not.
6788 Optionally treat bitfields as signed by default. */
6792 It is implementation-defined whether a plain (neither
6793 explicitly signed or unsigned) char, short, int, or long
6794 bit-field is signed or unsigned.
6796 Naturally, we extend this to long long as well. Note that
6797 this does not include wchar_t. */
6798 || (bitfield && !flag_signed_bitfields
6800 /* A typedef for plain `int' without `signed' can be
6801 controlled just like plain `int', but a typedef for
6802 `signed int' cannot be so controlled. */
6804 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
6805 && (TREE_CODE (type) == INTEGER_TYPE
6806 || TREE_CODE (type) == CHAR_TYPE)
6807 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
6810 type = long_long_unsigned_type_node;
6812 type = long_unsigned_type_node;
6814 type = short_unsigned_type_node;
6815 else if (type == char_type_node)
6816 type = unsigned_char_type_node;
6817 else if (typedef_decl)
6818 type = c_common_unsigned_type (type);
6820 type = unsigned_type_node;
6822 else if (signed_p && type == char_type_node)
6823 type = signed_char_type_node;
6825 type = long_long_integer_type_node;
6827 type = long_integer_type_node;
6829 type = short_integer_type_node;
6831 if (declspecs->specs[(int)ds_complex])
6833 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
6834 error ("complex invalid for %qs", name);
6835 /* If we just have "complex", it is equivalent to
6836 "complex double", but if any modifiers at all are specified it is
6837 the complex form of TYPE. E.g, "complex short" is
6838 "complex short int". */
6840 else if (defaulted_int && ! longlong
6841 && ! (long_p || short_p || signed_p || unsigned_p))
6842 type = complex_double_type_node;
6843 else if (type == integer_type_node)
6844 type = complex_integer_type_node;
6845 else if (type == float_type_node)
6846 type = complex_float_type_node;
6847 else if (type == double_type_node)
6848 type = complex_double_type_node;
6849 else if (type == long_double_type_node)
6850 type = complex_long_double_type_node;
6852 type = build_complex_type (type);
6855 type_quals = TYPE_UNQUALIFIED;
6856 if (declspecs->specs[(int)ds_const])
6857 type_quals |= TYPE_QUAL_CONST;
6858 if (declspecs->specs[(int)ds_volatile])
6859 type_quals |= TYPE_QUAL_VOLATILE;
6860 if (declspecs->specs[(int)ds_restrict])
6861 type_quals |= TYPE_QUAL_RESTRICT;
6862 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
6863 error ("qualifiers are not allowed on declaration of %<operator %T%>",
6866 if (TREE_CODE (type) == FUNCTION_TYPE
6867 && type_quals != TYPE_UNQUALIFIED)
6869 /* This was an error in C++98 (cv-qualifiers cannot be added to
6870 a function type), but DR 295 makes the code well-formed by
6871 dropping the extra qualifiers. */
6874 tree bad_type = build_qualified_type (type, type_quals);
6875 pedwarn ("ignoring %qV qualifiers added to function type %qT",
6878 type_quals = TYPE_UNQUALIFIED;
6880 type_quals |= cp_type_quals (type);
6881 type = cp_build_qualified_type_real
6882 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
6883 ? tf_ignore_bad_quals : 0) | tf_error | tf_warning));
6884 /* We might have ignored or rejected some of the qualifiers. */
6885 type_quals = cp_type_quals (type);
6888 inlinep = !! declspecs->specs[(int)ds_inline];
6889 virtualp = !! declspecs->specs[(int)ds_virtual];
6890 explicitp = !! declspecs->specs[(int)ds_explicit];
6892 storage_class = declspecs->storage_class;
6893 if (storage_class == sc_static)
6894 staticp = 1 + (decl_context == FIELD);
6896 if (virtualp && staticp == 2)
6898 error ("member %qD cannot be declared both virtual and static", dname);
6901 friendp = !! declspecs->specs[(int)ds_friend];
6903 if (dependant_name && !friendp)
6905 error ("%<%T::%D%> is not a valid declarator", ctype, dependant_name);
6906 return void_type_node;
6909 /* Issue errors about use of storage classes for parameters. */
6910 if (decl_context == PARM)
6912 if (declspecs->specs[(int)ds_typedef])
6913 error ("typedef declaration invalid in parameter declaration");
6914 else if (storage_class == sc_static
6915 || storage_class == sc_extern
6917 error ("storage class specifiers invalid in parameter declarations");
6920 /* Give error if `virtual' is used outside of class declaration. */
6922 && (current_class_name == NULL_TREE || decl_context != FIELD))
6924 error ("virtual outside class declaration");
6928 /* Static anonymous unions are dealt with here. */
6929 if (staticp && decl_context == TYPENAME
6931 && ANON_AGGR_TYPE_P (declspecs->type))
6932 decl_context = FIELD;
6934 /* Warn about storage classes that are invalid for certain
6935 kinds of declarations (parameters, typenames, etc.). */
6936 if (declspecs->multiple_storage_classes_p)
6937 error ("multiple storage classes in declaration of %qs", name);
6940 && storage_class != sc_extern
6941 && storage_class != sc_static)
6942 || declspecs->specs[(int)ds_typedef]))
6944 error ("multiple storage classes in declaration of %qs", name);
6947 else if (decl_context != NORMAL
6948 && ((storage_class != sc_none
6949 && storage_class != sc_mutable)
6952 if ((decl_context == PARM || decl_context == CATCHPARM)
6953 && (storage_class == sc_register
6954 || storage_class == sc_auto))
6956 else if (declspecs->specs[(int)ds_typedef])
6958 else if (decl_context == FIELD
6959 /* C++ allows static class elements. */
6960 && storage_class == sc_static)
6961 /* C++ also allows inlines and signed and unsigned elements,
6962 but in those cases we don't come in here. */
6966 if (decl_context == FIELD)
6968 tree tmp = NULL_TREE;
6973 /* Avoid trying to get an operand off an identifier node. */
6974 if (declarator->kind != cdk_id)
6975 tmp = declarator->declarator->u.id.unqualified_name;
6977 tmp = declarator->u.id.unqualified_name;
6978 op = IDENTIFIER_OPNAME_P (tmp);
6979 if (IDENTIFIER_TYPENAME_P (tmp))
6981 if (is_typename_at_global_scope (tmp))
6982 name = IDENTIFIER_POINTER (tmp);
6984 name = "<invalid operator>";
6987 error ("storage class specified for %s %qs",
6988 op ? "member operator" : "field",
6993 if (decl_context == PARM || decl_context == CATCHPARM)
6994 error ("storage class specified for parameter %qs", name);
6996 error ("storage class specified for typename");
6998 if (storage_class == sc_register
6999 || storage_class == sc_auto
7000 || storage_class == sc_extern
7002 storage_class = sc_none;
7005 else if (storage_class == sc_extern && initialized
7008 if (toplevel_bindings_p ())
7010 /* It's common practice (and completely valid) to have a const
7011 be initialized and declared extern. */
7012 if (!(type_quals & TYPE_QUAL_CONST))
7013 warning ("%qs initialized and declared %<extern%>", name);
7016 error ("%qs has both %<extern%> and initializer", name);
7018 else if (storage_class == sc_extern && funcdef_flag
7019 && ! toplevel_bindings_p ())
7020 error ("nested function %qs declared %<extern%>", name);
7021 else if (toplevel_bindings_p ())
7023 if (storage_class == sc_auto)
7024 error ("top-level declaration of %qs specifies %<auto%>", name);
7027 && storage_class != sc_extern
7028 && storage_class != sc_static)
7030 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7035 if (storage_class && friendp)
7036 error ("storage class specifiers invalid in friend function declarations");
7039 unqualified_id = NULL_TREE;
7042 unqualified_id = id_declarator->u.id.unqualified_name;
7043 if (TREE_CODE (unqualified_id) == BASELINK)
7044 unqualified_id = BASELINK_FUNCTIONS (unqualified_id);
7045 switch (TREE_CODE (unqualified_id))
7049 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7054 = constructor_name (TREE_TYPE (unqualified_id));
7057 case IDENTIFIER_NODE:
7058 case TEMPLATE_ID_EXPR:
7066 /* Determine the type of the entity declared by recurring on the
7068 for (; declarator; declarator = declarator->declarator)
7070 const cp_declarator *inner_declarator;
7073 if (type == error_mark_node)
7074 return error_mark_node;
7076 attrs = declarator->attributes;
7082 if (declarator == NULL || declarator->kind == cdk_id)
7083 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7084 if (declarator->kind == cdk_function)
7085 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7086 if (declarator->kind == cdk_array)
7087 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7088 returned_attrs = decl_attributes (&type,
7089 chainon (returned_attrs, attrs),
7093 if (declarator->kind == cdk_id)
7096 inner_declarator = declarator->declarator;
7098 switch (declarator->kind)
7101 type = create_array_type_for_decl (dname, type,
7102 declarator->u.array.bounds);
7110 /* Declaring a function type.
7111 Make sure we have a valid type for the function to return. */
7113 /* We now know that the TYPE_QUALS don't apply to the
7114 decl, but to its return type. */
7115 type_quals = TYPE_UNQUALIFIED;
7117 /* Warn about some types functions can't return. */
7119 if (TREE_CODE (type) == FUNCTION_TYPE)
7121 error ("%qs declared as function returning a function", name);
7122 type = integer_type_node;
7124 if (TREE_CODE (type) == ARRAY_TYPE)
7126 error ("%qs declared as function returning an array", name);
7127 type = integer_type_node;
7130 /* Pick up type qualifiers which should be applied to `this'. */
7131 quals = declarator->u.function.qualifiers;
7133 /* Pick up the exception specifications. */
7134 raises = declarator->u.function.exception_specification;
7136 /* Say it's a definition only for the CALL_EXPR
7137 closest to the identifier. */
7138 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7140 if (ctype == NULL_TREE
7141 && decl_context == FIELD
7143 && (friendp == 0 || dname == current_class_name))
7144 ctype = current_class_type;
7146 if (ctype && sfk == sfk_conversion)
7147 TYPE_HAS_CONVERSION (ctype) = 1;
7148 if (ctype && (sfk == sfk_constructor
7149 || sfk == sfk_destructor))
7151 /* We are within a class's scope. If our declarator name
7152 is the same as the class name, and we are defining
7153 a function, then it is a constructor/destructor, and
7154 therefore returns a void type. */
7156 if (flags == DTOR_FLAG)
7158 /* ISO C++ 12.4/2. A destructor may not be
7159 declared const or volatile. A destructor may
7162 error ("destructor cannot be static member function");
7165 error ("destructors may not be cv-qualified");
7166 quals = TYPE_UNQUALIFIED;
7168 if (decl_context == FIELD)
7170 if (! member_function_or_else (ctype,
7173 return void_type_node;
7176 else /* It's a constructor. */
7180 /* ISO C++ 12.1. A constructor may not be
7181 declared const or volatile. A constructor may
7182 not be virtual. A constructor may not be
7185 error ("constructor cannot be static member function");
7188 pedwarn ("constructors cannot be declared virtual");
7193 error ("constructors may not be cv-qualified");
7194 quals = TYPE_UNQUALIFIED;
7196 if (decl_context == FIELD)
7198 if (! member_function_or_else (ctype,
7201 return void_type_node;
7202 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
7203 if (sfk != sfk_constructor)
7207 if (decl_context == FIELD)
7213 error ("can't initialize friend function %qs", name);
7216 /* Cannot be both friend and virtual. */
7217 error ("virtual functions cannot be friends");
7220 if (decl_context == NORMAL)
7221 error ("friend declaration not in class definition");
7222 if (current_function_decl && funcdef_flag)
7223 error ("can't define friend function %qs in a local "
7228 arg_types = grokparms (declarator->u.function.parameters,
7231 if (inner_declarator
7232 && inner_declarator->kind == cdk_id
7233 && inner_declarator->u.id.sfk == sfk_destructor
7234 && arg_types != void_list_node)
7236 error ("destructors may not have parameters");
7237 arg_types = void_list_node;
7241 type = build_function_type (type, arg_types);
7242 type = cp_build_qualified_type (type, quals);
7249 /* Filter out pointers-to-references and references-to-references.
7250 We can get these if a TYPE_DECL is used. */
7252 if (TREE_CODE (type) == REFERENCE_TYPE)
7254 error (declarator->kind == cdk_reference
7255 ? "cannot declare reference to %q#T"
7256 : "cannot declare pointer to %q#T", type);
7257 type = TREE_TYPE (type);
7259 else if (VOID_TYPE_P (type))
7261 if (declarator->kind == cdk_reference)
7262 error ("cannot declare reference to %q#T", type);
7263 else if (declarator->kind == cdk_ptrmem)
7264 error ("cannot declare pointer to %q#T member", type);
7267 /* We now know that the TYPE_QUALS don't apply to the decl,
7268 but to the target of the pointer. */
7269 type_quals = TYPE_UNQUALIFIED;
7271 if (declarator->kind == cdk_ptrmem
7272 && (TREE_CODE (type) == FUNCTION_TYPE
7273 || (quals && TREE_CODE (type) == METHOD_TYPE)))
7277 /* If the type is a FUNCTION_TYPE, pick up the
7278 qualifiers from that function type. No other
7279 qualifiers may be supplied. */
7280 if (TREE_CODE (type) == FUNCTION_TYPE)
7281 quals = cp_type_quals (type);
7283 dummy = build_decl (TYPE_DECL, NULL_TREE, type);
7284 grok_method_quals (declarator->u.pointer.class_type,
7286 type = TREE_TYPE (dummy);
7287 quals = TYPE_UNQUALIFIED;
7290 if (declarator->kind == cdk_reference)
7292 if (!VOID_TYPE_P (type))
7293 type = build_reference_type (type);
7295 else if (TREE_CODE (type) == METHOD_TYPE)
7296 type = build_ptrmemfunc_type (build_pointer_type (type));
7297 else if (declarator->kind == cdk_ptrmem)
7299 /* We might have parsed a namespace as the class type. */
7300 if (TREE_CODE (declarator->u.pointer.class_type)
7303 error ("%qD is a namespace",
7304 declarator->u.pointer.class_type);
7305 type = build_pointer_type (type);
7307 else if (declarator->u.pointer.class_type == error_mark_node)
7308 /* We will already have complained. */
7309 type = error_mark_node;
7311 type = build_ptrmem_type (declarator->u.pointer.class_type,
7315 type = build_pointer_type (type);
7317 /* Process a list of type modifier keywords (such as
7318 const or volatile) that were given inside the `*' or `&'. */
7320 if (declarator->u.pointer.qualifiers)
7323 = cp_build_qualified_type (type,
7324 declarator->u.pointer.qualifiers);
7325 type_quals = cp_type_quals (type);
7338 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7339 && TREE_CODE (type) != FUNCTION_TYPE
7340 && TREE_CODE (type) != METHOD_TYPE)
7342 error ("template-id %qD used as a declarator",
7344 unqualified_id = dname;
7347 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7348 otherwise, we would not have exited the loop above. */
7350 && declarator->u.id.qualifying_scope
7351 && TYPE_P (declarator->u.id.qualifying_scope))
7355 ctype = declarator->u.id.qualifying_scope;
7356 ctype = TYPE_MAIN_VARIANT (ctype);
7358 while (t != NULL_TREE && CLASS_TYPE_P (t))
7360 /* You're supposed to have one `template <...>' for every
7361 template class, but you don't need one for a full
7362 specialization. For example:
7364 template <class T> struct S{};
7365 template <> struct S<int> { void f(); };
7366 void S<int>::f () {}
7368 is correct; there shouldn't be a `template <>' for the
7369 definition of `S<int>::f'. */
7370 if (CLASSTYPE_TEMPLATE_INFO (t)
7371 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t)
7372 || uses_template_parms (CLASSTYPE_TI_ARGS (t)))
7373 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7374 template_count += 1;
7376 t = TYPE_MAIN_DECL (t);
7377 t = DECL_CONTEXT (t);
7380 if (ctype == current_class_type)
7386 Is this ill-formed? */
7389 pedwarn ("extra qualification %<%T::%> on member %qs ignored",
7392 else if (TREE_CODE (type) == FUNCTION_TYPE)
7394 tree sname = declarator->u.id.unqualified_name;
7396 if (TREE_CODE (sname) == IDENTIFIER_NODE
7397 && NEW_DELETE_OPNAME_P (sname))
7398 /* Overloaded operator new and operator delete
7399 are always static functions. */
7401 else if (current_class_type == NULL_TREE || friendp)
7403 = build_method_type_directly (ctype,
7405 TYPE_ARG_TYPES (type));
7408 error ("cannot declare member function %<%T::%s%> within %<%T%>",
7409 ctype, name, current_class_type);
7410 return error_mark_node;
7413 else if (declspecs->specs[(int)ds_typedef]
7414 || COMPLETE_TYPE_P (complete_type (ctype)))
7416 /* Have to move this code elsewhere in this function.
7417 this code is used for i.e., typedef int A::M; M *pm;
7419 It is? How? jason 10/2/94 */
7421 if (current_class_type)
7423 error ("cannot declare member %<%T::%s%> within %qT",
7424 ctype, name, current_class_type);
7425 return void_type_node;
7430 cxx_incomplete_type_error (NULL_TREE, ctype);
7431 return error_mark_node;
7438 *attrlist = chainon (returned_attrs, *attrlist);
7440 attrlist = &returned_attrs;
7443 /* Now TYPE has the actual type. */
7445 /* Did array size calculations overflow? */
7447 if (TREE_CODE (type) == ARRAY_TYPE
7448 && COMPLETE_TYPE_P (type)
7449 && TREE_OVERFLOW (TYPE_SIZE (type)))
7451 error ("size of array %qs is too large", name);
7452 /* If we proceed with the array type as it is, we'll eventually
7453 crash in tree_low_cst(). */
7454 type = error_mark_node;
7457 if ((decl_context == FIELD || decl_context == PARM)
7458 && !processing_template_decl
7459 && variably_modified_type_p (type, NULL_TREE))
7461 if (decl_context == FIELD)
7462 error ("data member may not have variably modified type %qT", type);
7464 error ("parameter may not have variably modified type %qT", type);
7465 type = error_mark_node;
7468 if (explicitp == 1 || (explicitp && friendp))
7470 /* [dcl.fct.spec] The explicit specifier shall only be used in
7471 declarations of constructors within a class definition. */
7472 error ("only declarations of constructors can be %<explicit%>");
7476 if (storage_class == sc_mutable)
7478 if (decl_context != FIELD || friendp)
7480 error ("non-member %qs cannot be declared %<mutable%>", name);
7481 storage_class = sc_none;
7483 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7485 error ("non-object member %qs cannot be declared %<mutable%>", name);
7486 storage_class = sc_none;
7488 else if (TREE_CODE (type) == FUNCTION_TYPE
7489 || TREE_CODE (type) == METHOD_TYPE)
7491 error ("function %qs cannot be declared %<mutable%>", name);
7492 storage_class = sc_none;
7496 error ("static %qs cannot be declared %<mutable%>", name);
7497 storage_class = sc_none;
7499 else if (type_quals & TYPE_QUAL_CONST)
7501 error ("const %qs cannot be declared %<mutable%>", name);
7502 storage_class = sc_none;
7506 /* If this is declaring a typedef name, return a TYPE_DECL. */
7507 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7511 /* Note that the grammar rejects storage classes
7512 in typenames, fields or parameters. */
7513 if (current_lang_name == lang_name_java)
7514 TYPE_FOR_JAVA (type) = 1;
7516 if (decl_context == FIELD)
7517 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7519 decl = build_decl (TYPE_DECL, unqualified_id, type);
7520 if (id_declarator && declarator->u.id.qualifying_scope)
7521 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7523 if (decl_context != FIELD)
7525 if (!current_function_decl)
7526 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7527 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
7528 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
7529 (current_function_decl)))
7530 /* The TYPE_DECL is "abstract" because there will be
7531 clones of this constructor/destructor, and there will
7532 be copies of this TYPE_DECL generated in those
7534 DECL_ABSTRACT (decl) = 1;
7536 else if (constructor_name_p (unqualified_id, current_class_type))
7537 pedwarn ("ISO C++ forbids nested type %qD with same name "
7538 "as enclosing class",
7541 /* If the user declares "typedef struct {...} foo" then the
7542 struct will have an anonymous name. Fill that name in now.
7543 Nothing can refer to it, so nothing needs know about the name
7545 if (type != error_mark_node
7548 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7549 && TYPE_ANONYMOUS_P (type)
7550 /* Don't do this if there are attributes. */
7551 && (!attrlist || !*attrlist)
7552 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7554 tree oldname = TYPE_NAME (type);
7557 /* Replace the anonymous name with the real name everywhere. */
7558 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7559 if (TYPE_NAME (t) == oldname)
7560 TYPE_NAME (t) = decl;
7562 if (TYPE_LANG_SPECIFIC (type))
7563 TYPE_WAS_ANONYMOUS (type) = 1;
7565 /* If this is a typedef within a template class, the nested
7566 type is a (non-primary) template. The name for the
7567 template needs updating as well. */
7568 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7569 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7570 = TYPE_IDENTIFIER (type);
7572 /* FIXME remangle member functions; member functions of a
7573 type with external linkage have external linkage. */
7578 if (ctype == NULL_TREE)
7580 if (TREE_CODE (type) == METHOD_TYPE)
7581 ctype = TYPE_METHOD_BASETYPE (type);
7582 /* Any qualifiers on a function type typedef have
7583 already been dealt with. */
7584 else if (TREE_CODE (type) == FUNCTION_TYPE)
7585 quals = TYPE_UNQUALIFIED;
7587 if (ctype != NULL_TREE)
7588 grok_method_quals (ctype, decl, quals);
7592 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7593 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7595 bad_specifiers (decl, "type", virtualp, quals != TYPE_UNQUALIFIED,
7596 inlinep, friendp, raises != NULL_TREE);
7601 /* Detect the case of an array type of unspecified size
7602 which came, as such, direct from a typedef name.
7603 We must copy the type, so that the array's domain can be
7604 individually set by the object's initializer. */
7606 if (type && typedef_type
7607 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7608 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7609 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7611 /* Detect where we're using a typedef of function type to declare a
7612 function. PARMS will not be set, so we must create it now. */
7614 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
7616 tree decls = NULL_TREE;
7619 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
7621 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
7623 TREE_CHAIN (decl) = decls;
7627 parms = nreverse (decls);
7629 if (decl_context != TYPENAME)
7631 /* A cv-qualifier-seq shall only be part of the function type
7632 for a non-static member function. [8.3.5/4 dcl.fct] */
7633 if (cp_type_quals (type) != TYPE_UNQUALIFIED
7634 && (current_class_type == NULL_TREE || staticp) )
7636 error ("qualified function types cannot be used to declare %s functions",
7637 (staticp? "static member" : "free"));
7638 type = TYPE_MAIN_VARIANT (type);
7641 /* The qualifiers on the function type become the qualifiers on
7642 the non-static member function. */
7643 quals |= cp_type_quals (type);
7647 /* If this is a type name (such as, in a cast or sizeof),
7648 compute the type and return it now. */
7650 if (decl_context == TYPENAME)
7652 /* Note that the grammar rejects storage classes
7653 in typenames, fields or parameters. */
7654 if (type_quals != TYPE_UNQUALIFIED)
7655 type_quals = TYPE_UNQUALIFIED;
7657 /* Special case: "friend class foo" looks like a TYPENAME context. */
7660 if (type_quals != TYPE_UNQUALIFIED)
7662 error ("type qualifiers specified for friend class declaration");
7663 type_quals = TYPE_UNQUALIFIED;
7667 error ("%<inline%> specified for friend class declaration");
7673 /* Don't allow friend declaration without a class-key. */
7674 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
7675 pedwarn ("template parameters cannot be friends");
7676 else if (TREE_CODE (type) == TYPENAME_TYPE)
7677 pedwarn ("friend declaration requires class-key, "
7678 "i.e. %<friend class %T::%D%>",
7679 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
7681 pedwarn ("friend declaration requires class-key, "
7682 "i.e. %<friend %#T%>",
7686 /* Only try to do this stuff if we didn't already give up. */
7687 if (type != integer_type_node)
7689 /* A friendly class? */
7690 if (current_class_type)
7691 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
7694 error ("trying to make class %qT a friend of global scope",
7697 type = void_type_node;
7702 if (ctype == NULL_TREE)
7704 if (TREE_CODE (type) != METHOD_TYPE)
7705 error ("invalid qualifiers on non-member function type");
7707 ctype = TYPE_METHOD_BASETYPE (type);
7711 tree dummy = build_decl (TYPE_DECL, unqualified_id, type);
7712 grok_method_quals (ctype, dummy, quals);
7713 type = TREE_TYPE (dummy);
7719 else if (unqualified_id == NULL_TREE && decl_context != PARM
7720 && decl_context != CATCHPARM
7721 && TREE_CODE (type) != UNION_TYPE
7724 error ("abstract declarator %qT used as declaration", type);
7725 return error_mark_node;
7728 /* Only functions may be declared using an operator-function-id. */
7730 && IDENTIFIER_OPNAME_P (unqualified_id)
7731 && TREE_CODE (type) != FUNCTION_TYPE
7732 && TREE_CODE (type) != METHOD_TYPE)
7734 error ("declaration of %qD as non-function", unqualified_id);
7735 return error_mark_node;
7738 /* We don't check parameter types here because we can emit a better
7739 error message later. */
7740 if (decl_context != PARM)
7741 type = check_var_type (unqualified_id, type);
7743 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7744 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7746 if (decl_context == PARM || decl_context == CATCHPARM)
7748 if (ctype || in_namespace)
7749 error ("cannot use %<::%> in parameter declaration");
7751 /* A parameter declared as an array of T is really a pointer to T.
7752 One declared as a function is really a pointer to a function.
7753 One declared as a member is really a pointer to member. */
7755 if (TREE_CODE (type) == ARRAY_TYPE)
7757 /* Transfer const-ness of array into that of type pointed to. */
7758 type = build_pointer_type (TREE_TYPE (type));
7759 type_quals = TYPE_UNQUALIFIED;
7761 else if (TREE_CODE (type) == FUNCTION_TYPE)
7762 type = build_pointer_type (type);
7768 if (decl_context == PARM)
7770 decl = cp_build_parm_decl (unqualified_id, type);
7772 bad_specifiers (decl, "parameter", virtualp, quals != TYPE_UNQUALIFIED,
7773 inlinep, friendp, raises != NULL_TREE);
7775 else if (decl_context == FIELD)
7777 /* The C99 flexible array extension. */
7778 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
7779 && TYPE_DOMAIN (type) == NULL_TREE)
7781 tree itype = compute_array_index_type (dname, integer_zero_node);
7782 type = build_cplus_array_type (TREE_TYPE (type), itype);
7785 if (type == error_mark_node)
7787 /* Happens when declaring arrays of sizes which
7788 are error_mark_node, for example. */
7791 else if (in_namespace && !friendp)
7793 /* Something like struct S { int N::j; }; */
7794 error ("invalid use of %<::%>");
7797 else if (TREE_CODE (type) == FUNCTION_TYPE)
7800 tree function_context;
7804 if (ctype == NULL_TREE)
7805 ctype = current_class_type;
7807 if (ctype == NULL_TREE)
7809 error ("can't make %qD into a method -- not in a class",
7811 return void_type_node;
7814 /* ``A union may [ ... ] not [ have ] virtual functions.''
7816 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
7818 error ("function %qD declared virtual inside a union",
7820 return void_type_node;
7823 if (NEW_DELETE_OPNAME_P (unqualified_id))
7827 error ("%qD cannot be declared virtual, since it "
7833 else if (staticp < 2)
7834 type = build_method_type_directly (ctype,
7836 TYPE_ARG_TYPES (type));
7839 /* Check that the name used for a destructor makes sense. */
7840 if (sfk == sfk_destructor
7841 && !same_type_p (TREE_OPERAND
7842 (id_declarator->u.id.unqualified_name, 0),
7845 error ("declaration of %qD as member of %qT",
7846 id_declarator->u.id.unqualified_name,
7848 return error_mark_node;
7851 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7852 function_context = (ctype != NULL_TREE) ?
7853 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
7854 publicp = (! friendp || ! staticp)
7855 && function_context == NULL_TREE;
7856 decl = grokfndecl (ctype, type,
7857 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7858 ? unqualified_id : dname,
7861 virtualp, flags, quals, raises,
7862 friendp ? -1 : 0, friendp, publicp, inlinep,
7864 funcdef_flag, template_count, in_namespace, attrlist);
7865 if (decl == NULL_TREE)
7868 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7869 /* The decl and setting of decl_attr is also turned off. */
7870 decl = build_decl_attribute_variant (decl, decl_attr);
7873 /* [class.conv.ctor]
7875 A constructor declared without the function-specifier
7876 explicit that can be called with a single parameter
7877 specifies a conversion from the type of its first
7878 parameter to the type of its class. Such a constructor
7879 is called a converting constructor. */
7881 DECL_NONCONVERTING_P (decl) = 1;
7882 else if (DECL_CONSTRUCTOR_P (decl))
7884 /* The constructor can be called with exactly one
7885 parameter if there is at least one parameter, and
7886 any subsequent parameters have default arguments.
7887 Ignore any compiler-added parms. */
7888 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
7890 if (arg_types == void_list_node
7892 && TREE_CHAIN (arg_types)
7893 && TREE_CHAIN (arg_types) != void_list_node
7894 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
7895 DECL_NONCONVERTING_P (decl) = 1;
7898 else if (TREE_CODE (type) == METHOD_TYPE)
7900 /* We only get here for friend declarations of
7901 members of other classes. */
7902 /* All method decls are public, so tell grokfndecl to set
7903 TREE_PUBLIC, also. */
7904 decl = grokfndecl (ctype, type,
7905 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7906 ? unqualified_id : dname,
7909 virtualp, flags, quals, raises,
7910 friendp ? -1 : 0, friendp, 1, 0, sfk,
7911 funcdef_flag, template_count, in_namespace,
7913 if (decl == NULL_TREE)
7916 else if (!staticp && !dependent_type_p (type)
7917 && !COMPLETE_TYPE_P (complete_type (type))
7918 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
7921 error ("field %qD has incomplete type", unqualified_id);
7923 error ("name %qT has incomplete type", type);
7925 /* If we're instantiating a template, tell them which
7926 instantiation made the field's type be incomplete. */
7927 if (current_class_type
7928 && TYPE_NAME (current_class_type)
7929 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
7931 && declspecs->type == type)
7932 error (" in instantiation of template %qT",
7933 current_class_type);
7935 type = error_mark_node;
7942 error ("%qE is neither function nor member function; "
7943 "cannot be declared friend", unqualified_id);
7951 /* Friends are treated specially. */
7952 if (ctype == current_class_type)
7953 warning ("member functions are implicitly friends of their class");
7954 else if (decl && DECL_NAME (decl))
7956 if (template_class_depth (current_class_type) == 0)
7958 decl = check_explicit_specialization
7959 (unqualified_id, decl, template_count,
7960 2 * (funcdef_flag != 0) + 4);
7961 if (decl == error_mark_node)
7962 return error_mark_node;
7965 decl = do_friend (ctype, unqualified_id, decl,
7966 *attrlist, flags, quals, funcdef_flag);
7970 return void_type_node;
7973 /* Structure field. It may not be a function, except for C++. */
7975 if (decl == NULL_TREE)
7981 /* An attempt is being made to initialize a non-static
7982 member. But, from [class.mem]:
7984 4 A member-declarator can contain a
7985 constant-initializer only if it declares a static
7986 member (_class.static_) of integral or enumeration
7987 type, see _class.static.data_.
7989 This used to be relatively common practice, but
7990 the rest of the compiler does not correctly
7991 handle the initialization unless the member is
7992 static so we make it static below. */
7993 pedwarn ("ISO C++ forbids initialization of member %qD",
7995 pedwarn ("making %qD static", unqualified_id);
7999 if (uses_template_parms (type))
8000 /* We'll check at instantiation time. */
8002 else if (check_static_variable_definition (unqualified_id,
8004 /* If we just return the declaration, crashes
8005 will sometimes occur. We therefore return
8006 void_type_node, as if this was a friend
8007 declaration, to cause callers to completely
8008 ignore this declaration. */
8009 return void_type_node;
8014 /* C++ allows static class members. All other work
8015 for this is done by grokfield. */
8016 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8017 set_linkage_for_static_data_member (decl);
8018 /* Even if there is an in-class initialization, DECL
8019 is considered undefined until an out-of-class
8020 definition is provided. */
8021 DECL_EXTERNAL (decl) = 1;
8025 decl = build_decl (FIELD_DECL, unqualified_id, type);
8026 DECL_NONADDRESSABLE_P (decl) = bitfield;
8027 if (storage_class == sc_mutable)
8029 DECL_MUTABLE_P (decl) = 1;
8030 storage_class = sc_none;
8034 bad_specifiers (decl, "field", virtualp, quals != TYPE_UNQUALIFIED,
8035 inlinep, friendp, raises != NULL_TREE);
8038 else if (TREE_CODE (type) == FUNCTION_TYPE
8039 || TREE_CODE (type) == METHOD_TYPE)
8044 if (!unqualified_id)
8047 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8048 original_name = dname;
8050 original_name = unqualified_id;
8052 if (storage_class == sc_auto)
8053 error ("storage class %<auto%> invalid for function %qs", name);
8054 else if (storage_class == sc_register)
8055 error ("storage class %<register%> invalid for function %qs", name);
8057 error ("storage class %<__thread%> invalid for function %qs", name);
8059 /* Function declaration not at top level.
8060 Storage classes other than `extern' are not allowed
8061 and `extern' makes no difference. */
8062 if (! toplevel_bindings_p ()
8063 && (storage_class == sc_static
8064 || declspecs->specs[(int)ds_inline])
8067 if (storage_class == sc_static)
8068 pedwarn ("%<static%> specified invalid for function %qs "
8069 "declared out of global scope", name);
8071 pedwarn ("%<inline%> specifier invalid for function %qs "
8072 "declared out of global scope", name);
8075 if (ctype == NULL_TREE)
8079 error ("virtual non-class function %qs", name);
8083 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8084 && !NEW_DELETE_OPNAME_P (original_name))
8085 type = build_method_type_directly (ctype,
8087 TYPE_ARG_TYPES (type));
8089 /* Record presence of `static'. */
8090 publicp = (ctype != NULL_TREE
8091 || storage_class == sc_extern
8092 || storage_class != sc_static);
8094 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8095 virtualp, flags, quals, raises,
8097 publicp, inlinep, sfk, funcdef_flag,
8098 template_count, in_namespace, attrlist);
8099 if (decl == NULL_TREE)
8104 int invalid_static = 0;
8106 /* Don't allow a static member function in a class, and forbid
8107 declaring main to be static. */
8108 if (TREE_CODE (type) == METHOD_TYPE)
8110 pedwarn ("cannot declare member function %qD to have "
8111 "static linkage", decl);
8114 else if (current_function_decl)
8116 /* FIXME need arm citation */
8117 error ("cannot declare static function inside another function");
8124 storage_class = sc_none;
8130 /* It's a variable. */
8132 /* An uninitialized decl with `extern' is a reference. */
8133 decl = grokvardecl (type, unqualified_id,
8136 (type_quals & TYPE_QUAL_CONST) != 0,
8137 ctype ? ctype : in_namespace);
8138 bad_specifiers (decl, "variable", virtualp, quals != TYPE_UNQUALIFIED,
8139 inlinep, friendp, raises != NULL_TREE);
8143 DECL_CONTEXT (decl) = ctype;
8146 pedwarn ("%<static%> may not be used when defining "
8147 "(as opposed to declaring) a static data member");
8149 storage_class = sc_none;
8151 if (storage_class == sc_register && TREE_STATIC (decl))
8153 error ("static member %qD declared %<register%>", decl);
8154 storage_class = sc_none;
8156 if (storage_class == sc_extern && pedantic)
8158 pedwarn ("cannot explicitly declare member %q#D to have "
8161 storage_class = sc_none;
8166 /* Record `register' declaration for warnings on &
8167 and in case doing stupid register allocation. */
8169 if (storage_class == sc_register)
8170 DECL_REGISTER (decl) = 1;
8171 else if (storage_class == sc_extern)
8172 DECL_THIS_EXTERN (decl) = 1;
8173 else if (storage_class == sc_static)
8174 DECL_THIS_STATIC (decl) = 1;
8176 /* Record constancy and volatility. There's no need to do this
8177 when processing a template; we'll do this for the instantiated
8178 declaration based on the type of DECL. */
8179 if (!processing_template_decl)
8180 cp_apply_type_quals_to_decl (type_quals, decl);
8186 /* Subroutine of start_function. Ensure that each of the parameter
8187 types (as listed in PARMS) is complete, as is required for a
8188 function definition. */
8191 require_complete_types_for_parms (tree parms)
8193 for (; parms; parms = TREE_CHAIN (parms))
8195 if (dependent_type_p (TREE_TYPE (parms)))
8197 if (VOID_TYPE_P (TREE_TYPE (parms)))
8198 /* grokparms will have already issued an error. */
8199 TREE_TYPE (parms) = error_mark_node;
8200 else if (complete_type_or_else (TREE_TYPE (parms), parms))
8202 layout_decl (parms, 0);
8203 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8208 /* Returns nonzero if T is a local variable. */
8211 local_variable_p (tree t)
8213 if ((TREE_CODE (t) == VAR_DECL
8214 /* A VAR_DECL with a context that is a _TYPE is a static data
8216 && !TYPE_P (CP_DECL_CONTEXT (t))
8217 /* Any other non-local variable must be at namespace scope. */
8218 && !DECL_NAMESPACE_SCOPE_P (t))
8219 || (TREE_CODE (t) == PARM_DECL))
8225 /* Returns nonzero if T is an automatic local variable or a label.
8226 (These are the declarations that need to be remapped when the code
8227 containing them is duplicated.) */
8230 nonstatic_local_decl_p (tree t)
8232 return ((local_variable_p (t) && !TREE_STATIC (t))
8233 || TREE_CODE (t) == LABEL_DECL
8234 || TREE_CODE (t) == RESULT_DECL);
8237 /* Like local_variable_p, but suitable for use as a tree-walking
8241 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8242 void *data ATTRIBUTE_UNUSED)
8244 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8246 else if (TYPE_P (*tp))
8253 /* Check that ARG, which is a default-argument expression for a
8254 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8255 something goes wrong. DECL may also be a _TYPE node, rather than a
8256 DECL, if there is no DECL available. */
8259 check_default_argument (tree decl, tree arg)
8264 if (TREE_CODE (arg) == DEFAULT_ARG)
8265 /* We get a DEFAULT_ARG when looking at an in-class declaration
8266 with a default argument. Ignore the argument for now; we'll
8267 deal with it after the class is complete. */
8270 if (processing_template_decl || uses_template_parms (arg))
8271 /* We don't do anything checking until instantiation-time. Note
8272 that there may be uninstantiated arguments even for an
8273 instantiated function, since default arguments are not
8274 instantiated until they are needed. */
8283 decl_type = TREE_TYPE (decl);
8285 if (arg == error_mark_node
8286 || decl == error_mark_node
8287 || TREE_TYPE (arg) == error_mark_node
8288 || decl_type == error_mark_node)
8289 /* Something already went wrong. There's no need to check
8291 return error_mark_node;
8293 /* [dcl.fct.default]
8295 A default argument expression is implicitly converted to the
8297 if (!TREE_TYPE (arg)
8298 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
8301 error ("default argument for %q#D has type %qT",
8302 decl, TREE_TYPE (arg));
8304 error ("default argument for parameter of type %qT has type %qT",
8305 decl_type, TREE_TYPE (arg));
8307 return error_mark_node;
8310 /* [dcl.fct.default]
8312 Local variables shall not be used in default argument
8315 The keyword `this' shall not be used in a default argument of a
8317 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8321 error ("default argument %qE uses local variable %qD", arg, var);
8322 return error_mark_node;
8329 /* Decode the list of parameter types for a function type.
8330 Given the list of things declared inside the parens,
8331 return a list of types.
8333 If this parameter does not end with an ellipsis, we append
8336 *PARMS is set to the chain of PARM_DECLs created. */
8339 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8341 tree result = NULL_TREE;
8342 tree decls = NULL_TREE;
8343 int ellipsis = !first_parm || first_parm->ellipsis_p;
8344 cp_parameter_declarator *parm;
8347 for (parm = first_parm; parm != NULL; parm = parm->next)
8349 tree type = NULL_TREE;
8350 tree init = parm->default_argument;
8354 if (parm == no_parameters)
8357 attrs = parm->decl_specifiers.attributes;
8358 parm->decl_specifiers.attributes = NULL_TREE;
8359 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8360 PARM, init != NULL_TREE, &attrs);
8361 if (! decl || TREE_TYPE (decl) == error_mark_node)
8365 cplus_decl_attributes (&decl, attrs, 0);
8367 type = TREE_TYPE (decl);
8368 if (VOID_TYPE_P (type))
8370 if (same_type_p (type, void_type_node)
8371 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8372 /* this is a parmlist of `(void)', which is ok. */
8374 cxx_incomplete_type_error (decl, type);
8375 /* It's not a good idea to actually create parameters of
8376 type `void'; other parts of the compiler assume that a
8377 void type terminates the parameter list. */
8378 type = error_mark_node;
8379 TREE_TYPE (decl) = error_mark_node;
8382 if (type != error_mark_node)
8384 /* Top-level qualifiers on the parameters are
8385 ignored for function types. */
8386 type = cp_build_qualified_type (type, 0);
8387 if (TREE_CODE (type) == METHOD_TYPE)
8389 error ("parameter %qD invalidly declared method type", decl);
8390 type = build_pointer_type (type);
8391 TREE_TYPE (decl) = type;
8393 else if (abstract_virtuals_error (decl, type))
8394 any_error = 1; /* Seems like a good idea. */
8395 else if (POINTER_TYPE_P (type))
8397 /* [dcl.fct]/6, parameter types cannot contain pointers
8398 (references) to arrays of unknown bound. */
8399 tree t = TREE_TYPE (type);
8400 int ptr = TYPE_PTR_P (type);
8406 else if (TREE_CODE (t) != ARRAY_TYPE)
8408 else if (!TYPE_DOMAIN (t))
8412 if (TREE_CODE (t) == ARRAY_TYPE)
8413 error ("parameter %qD includes %s to array of unknown "
8415 decl, ptr ? "pointer" : "reference", t);
8418 if (!any_error && init)
8419 init = check_default_argument (decl, init);
8424 TREE_CHAIN (decl) = decls;
8426 result = tree_cons (init, type, result);
8428 decls = nreverse (decls);
8429 result = nreverse (result);
8431 result = chainon (result, void_list_node);
8438 /* D is a constructor or overloaded `operator='.
8440 Let T be the class in which D is declared. Then, this function
8443 -1 if D's is an ill-formed constructor or copy assignment operator
8444 whose first parameter is of type `T'.
8445 0 if D is not a copy constructor or copy assignment
8447 1 if D is a copy constructor or copy assignment operator whose
8448 first parameter is a reference to const qualified T.
8449 2 if D is a copy constructor or copy assignment operator whose
8450 first parameter is a reference to non-const qualified T.
8452 This function can be used as a predicate. Positive values indicate
8453 a copy constructor and nonzero values indicate a copy assignment
8463 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8465 if (DECL_TEMPLATE_INFO (d)
8466 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d)))
8467 /* Instantiations of template member functions are never copy
8468 functions. Note that member functions of templated classes are
8469 represented as template functions internally, and we must
8470 accept those as copy functions. */
8473 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8477 arg_type = TREE_VALUE (args);
8479 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8481 /* Pass by value copy assignment operator. */
8484 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8485 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8487 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8493 args = TREE_CHAIN (args);
8495 if (args && args != void_list_node && !TREE_PURPOSE (args))
8496 /* There are more non-optional args. */
8502 /* Remember any special properties of member function DECL. */
8504 void grok_special_member_properties (tree decl)
8506 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl))
8507 ; /* Not special. */
8508 else if (DECL_CONSTRUCTOR_P (decl))
8510 int ctor = copy_fn_p (decl);
8516 A non-template constructor for class X is a copy
8517 constructor if its first parameter is of type X&, const
8518 X&, volatile X& or const volatile X&, and either there
8519 are no other parameters or else all other parameters have
8520 default arguments. */
8521 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl)) = 1;
8523 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl)) = 1;
8525 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8526 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl)) = 1;
8528 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8532 A non-template assignment operator for class X is a copy
8533 assignment operator if its parameter is of type X, X&, const
8534 X&, volatile X& or const volatile X&. */
8536 int assop = copy_fn_p (decl);
8540 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8542 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8547 /* Check a constructor DECL has the correct form. Complains
8548 if the class has a constructor of the form X(X). */
8551 grok_ctor_properties (tree ctype, tree decl)
8553 int ctor_parm = copy_fn_p (decl);
8559 A declaration of a constructor for a class X is ill-formed if
8560 its first parameter is of type (optionally cv-qualified) X
8561 and either there are no other parameters or else all other
8562 parameters have default arguments.
8564 We *don't* complain about member template instantiations that
8565 have this form, though; they can occur as we try to decide
8566 what constructor to use during overload resolution. Since
8567 overload resolution will never prefer such a constructor to
8568 the non-template copy constructor (which is either explicitly
8569 or implicitly defined), there's no need to worry about their
8570 existence. Theoretically, they should never even be
8571 instantiated, but that's hard to forestall. */
8572 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
8580 /* An operator with this code is unary, but can also be binary. */
8583 ambi_op_p (enum tree_code code)
8585 return (code == INDIRECT_REF
8586 || code == ADDR_EXPR
8587 || code == CONVERT_EXPR
8588 || code == NEGATE_EXPR
8589 || code == PREINCREMENT_EXPR
8590 || code == PREDECREMENT_EXPR);
8593 /* An operator with this name can only be unary. */
8596 unary_op_p (enum tree_code code)
8598 return (code == TRUTH_NOT_EXPR
8599 || code == BIT_NOT_EXPR
8600 || code == COMPONENT_REF
8601 || code == TYPE_EXPR);
8604 /* DECL is a declaration for an overloaded operator. Returns true if
8605 the declaration is valid; false otherwise. If COMPLAIN is true,
8606 errors are issued for invalid declarations. */
8609 grok_op_properties (tree decl, int friendp, bool complain)
8611 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
8613 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
8614 tree name = DECL_NAME (decl);
8615 enum tree_code operator_code;
8619 /* Assume that the declaration is valid. */
8622 /* Count the number of arguments. */
8623 for (argtype = argtypes, arity = 0;
8624 argtype && argtype != void_list_node;
8625 argtype = TREE_CHAIN (argtype))
8628 if (current_class_type == NULL_TREE)
8631 if (DECL_CONV_FN_P (decl))
8632 operator_code = TYPE_EXPR;
8636 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8637 if (ansi_opname (CODE) == name) \
8639 operator_code = (CODE); \
8642 else if (ansi_assopname (CODE) == name) \
8644 operator_code = (CODE); \
8645 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8649 #include "operators.def"
8655 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
8656 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8660 switch (operator_code)
8663 TYPE_HAS_NEW_OPERATOR (current_class_type) = 1;
8667 TYPE_GETS_DELETE (current_class_type) |= 1;
8671 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type) = 1;
8674 case VEC_DELETE_EXPR:
8675 TYPE_GETS_DELETE (current_class_type) |= 2;
8683 /* [basic.std.dynamic.allocation]/1:
8685 A program is ill-formed if an allocation function is declared
8686 in a namespace scope other than global scope or declared static
8689 The same also holds true for deallocation functions. */
8690 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
8691 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8693 if (DECL_NAMESPACE_SCOPE_P (decl))
8695 if (CP_DECL_CONTEXT (decl) != global_namespace)
8696 error ("%qD may not be declared within a namespace", decl);
8697 else if (!TREE_PUBLIC (decl))
8698 error ("%qD may not be declared as static", decl);
8702 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
8703 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
8704 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8705 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
8708 /* An operator function must either be a non-static member function
8709 or have at least one parameter of a class, a reference to a class,
8710 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8711 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
8713 if (operator_code == TYPE_EXPR
8714 || operator_code == CALL_EXPR
8715 || operator_code == COMPONENT_REF
8716 || operator_code == ARRAY_REF
8717 || operator_code == NOP_EXPR)
8718 error ("%qD must be a nonstatic member function", decl);
8723 if (DECL_STATIC_FUNCTION_P (decl))
8724 error ("%qD must be either a non-static member "
8725 "function or a non-member function", decl);
8727 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
8729 tree arg = non_reference (TREE_VALUE (p));
8730 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8731 because these checks are performed even on
8732 template functions. */
8733 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
8737 if (!p || p == void_list_node)
8742 error ("%qD must have an argument of class or "
8750 /* There are no restrictions on the arguments to an overloaded
8752 if (operator_code == CALL_EXPR)
8755 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
8757 tree t = TREE_TYPE (name);
8760 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
8761 const char *what = 0;
8764 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
8766 if (TREE_CODE (t) == VOID_TYPE)
8768 else if (t == current_class_type)
8769 what = "the same type";
8770 /* Don't force t to be complete here. */
8771 else if (IS_AGGR_TYPE (t)
8772 && COMPLETE_TYPE_P (t)
8773 && DERIVED_FROM_P (t, current_class_type))
8774 what = "a base class";
8776 if (what && warn_conversion)
8777 warning ("conversion to %s%s will never use a type "
8778 "conversion operator",
8779 ref ? "a reference to " : "", what);
8782 if (operator_code == COND_EXPR)
8785 error ("ISO C++ prohibits overloading operator ?:");
8787 else if (ambi_op_p (operator_code))
8790 /* We pick the one-argument operator codes by default, so
8791 we don't have to change anything. */
8793 else if (arity == 2)
8795 /* If we thought this was a unary operator, we now know
8796 it to be a binary operator. */
8797 switch (operator_code)
8800 operator_code = MULT_EXPR;
8804 operator_code = BIT_AND_EXPR;
8808 operator_code = PLUS_EXPR;
8812 operator_code = MINUS_EXPR;
8815 case PREINCREMENT_EXPR:
8816 operator_code = POSTINCREMENT_EXPR;
8819 case PREDECREMENT_EXPR:
8820 operator_code = POSTDECREMENT_EXPR;
8827 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8829 if ((operator_code == POSTINCREMENT_EXPR
8830 || operator_code == POSTDECREMENT_EXPR)
8831 && ! processing_template_decl
8832 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
8835 error ("postfix %qD must take %<int%> as its argument",
8839 ("postfix %qD must take %<int%> as its second argument",
8846 error ("%qD must take either zero or one argument", decl);
8848 error ("%qD must take either one or two arguments", decl);
8851 /* More Effective C++ rule 6. */
8853 && (operator_code == POSTINCREMENT_EXPR
8854 || operator_code == POSTDECREMENT_EXPR
8855 || operator_code == PREINCREMENT_EXPR
8856 || operator_code == PREDECREMENT_EXPR))
8858 tree arg = TREE_VALUE (argtypes);
8859 tree ret = TREE_TYPE (TREE_TYPE (decl));
8860 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
8861 arg = TREE_TYPE (arg);
8862 arg = TYPE_MAIN_VARIANT (arg);
8863 if (operator_code == PREINCREMENT_EXPR
8864 || operator_code == PREDECREMENT_EXPR)
8866 if (TREE_CODE (ret) != REFERENCE_TYPE
8867 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
8869 warning ("prefix %qD should return %qT", decl,
8870 build_reference_type (arg));
8874 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
8875 warning ("postfix %qD should return %qT", decl, arg);
8879 else if (unary_op_p (operator_code))
8884 error ("%qD must take %<void%>", decl);
8886 error ("%qD must take exactly one argument", decl);
8889 else /* if (binary_op_p (operator_code)) */
8894 error ("%qD must take exactly one argument", decl);
8896 error ("%qD must take exactly two arguments", decl);
8899 /* More Effective C++ rule 7. */
8901 && (operator_code == TRUTH_ANDIF_EXPR
8902 || operator_code == TRUTH_ORIF_EXPR
8903 || operator_code == COMPOUND_EXPR))
8904 warning ("user-defined %qD always evaluates both arguments",
8908 /* Effective C++ rule 23. */
8911 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
8912 && (operator_code == PLUS_EXPR
8913 || operator_code == MINUS_EXPR
8914 || operator_code == TRUNC_DIV_EXPR
8915 || operator_code == MULT_EXPR
8916 || operator_code == TRUNC_MOD_EXPR)
8917 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
8918 warning ("%qD should return by value", decl);
8921 for (; argtypes && argtypes != void_list_node;
8922 argtypes = TREE_CHAIN (argtypes))
8923 if (TREE_PURPOSE (argtypes))
8925 TREE_PURPOSE (argtypes) = NULL_TREE;
8926 if (operator_code == POSTINCREMENT_EXPR
8927 || operator_code == POSTDECREMENT_EXPR)
8930 pedwarn ("%qD cannot have default arguments", decl);
8933 error ("%qD cannot have default arguments", decl);
8941 /* Return a string giving the keyword associate with CODE. */
8944 tag_name (enum tag_types code)
8963 /* Name lookup in an elaborated-type-specifier (after the keyword
8964 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
8965 elaborated-type-specifier is invalid, issue a diagnostic and return
8966 error_mark_node; otherwise, return the *_TYPE to which it referred.
8967 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
8970 check_elaborated_type_specifier (enum tag_types tag_code,
8972 bool allow_template_p)
8978 struct S { struct S *p; };
8980 name lookup will find the TYPE_DECL for the implicit "S::S"
8981 typedef. Adjust for that here. */
8982 if (DECL_SELF_REFERENCE_P (decl))
8983 decl = TYPE_NAME (TREE_TYPE (decl));
8985 type = TREE_TYPE (decl);
8987 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
8988 is false for this case as well. */
8989 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8991 error ("using template type parameter %qT after %qs",
8992 type, tag_name (tag_code));
8993 return error_mark_node;
8997 If the identifier resolves to a typedef-name or a template
8998 type-parameter, the elaborated-type-specifier is ill-formed.
9000 In other words, the only legitimate declaration to use in the
9001 elaborated type specifier is the implicit typedef created when
9002 the type is declared. */
9003 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9004 && tag_code != typename_type)
9006 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9007 cp_error_at ("%qD has a previous declaration here", decl);
9008 return error_mark_node;
9010 else if (TREE_CODE (type) != RECORD_TYPE
9011 && TREE_CODE (type) != UNION_TYPE
9012 && tag_code != enum_type
9013 && tag_code != typename_type)
9015 error ("%qT referred to as %qs", type, tag_name (tag_code));
9016 cp_error_at ("%qT has a previous declaration here", type);
9017 return error_mark_node;
9019 else if (TREE_CODE (type) != ENUMERAL_TYPE
9020 && tag_code == enum_type
9021 && tag_code != typename_type)
9023 error ("%qT referred to as enum", type);
9024 cp_error_at ("%qT has a previous declaration here", type);
9025 return error_mark_node;
9027 else if (!allow_template_p
9028 && TREE_CODE (type) == RECORD_TYPE
9029 && CLASSTYPE_IS_TEMPLATE (type))
9031 /* If a class template appears as elaborated type specifier
9032 without a template header such as:
9034 template <class T> class C {};
9035 void f(class C); // No template header here
9037 then the required template argument is missing. */
9039 error ("template argument required for %<%s %T%>",
9040 tag_name (tag_code),
9041 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9042 return error_mark_node;
9048 /* Lookup NAME in elaborate type specifier in scope according to
9049 SCOPE and issue diagnostics if necessary.
9050 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9051 found, and ERROR_MARK_NODE for type error. */
9054 lookup_and_check_tag (enum tag_types tag_code, tree name,
9055 tag_scope scope, bool template_header_p)
9059 if (scope == ts_global)
9060 decl = lookup_name (name, 2);
9062 decl = lookup_type_scope (name, scope);
9064 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9065 decl = DECL_TEMPLATE_RESULT (decl);
9067 if (decl && TREE_CODE (decl) == TYPE_DECL)
9069 /* Look for invalid nested type:
9073 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9075 error ("%qD has the same name as the class in which it is "
9078 return error_mark_node;
9081 /* Two cases we need to consider when deciding if a class
9082 template is allowed as an elaborated type specifier:
9083 1. It is a self reference to its own class.
9084 2. It comes with a template header.
9088 template <class T> class C {
9089 class C *c1; // DECL_SELF_REFERENCE_P is true
9092 template <class U> class C; // template_header_p is true
9093 template <class T> class C<T>::D {
9094 class C *c2; // DECL_SELF_REFERENCE_P is true
9097 t = check_elaborated_type_specifier (tag_code,
9100 | DECL_SELF_REFERENCE_P (decl));
9107 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9108 Define the tag as a forward-reference if it is not defined.
9110 If a declaration is given, process it here, and report an error if
9111 multiple declarations are not identical.
9113 SCOPE is TS_CURRENT when this is also a definition. Only look in
9114 the current frame for the name (since C++ allows new names in any
9115 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9116 declaration. Only look beginning from the current scope outward up
9117 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9119 TEMPLATE_HEADER_P is true when this declaration is preceded by
9120 a set of template parameters. */
9123 xref_tag (enum tag_types tag_code, tree name,
9124 tag_scope scope, bool template_header_p)
9126 enum tree_code code;
9128 tree context = NULL_TREE;
9130 timevar_push (TV_NAME_LOOKUP);
9132 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9144 code = ENUMERAL_TYPE;
9150 /* In case of anonymous name, xref_tag is only called to
9151 make type node and push name. Name lookup is not required. */
9152 if (ANON_AGGRNAME_P (name))
9155 t = lookup_and_check_tag (tag_code, name,
9156 scope, template_header_p);
9158 if (t == error_mark_node)
9159 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9161 if (scope != ts_current && t && current_class_type
9162 && template_class_depth (current_class_type)
9163 && template_header_p)
9165 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9166 definition of this tag. Since, in addition, we are currently
9167 processing a (member) template declaration of a template
9168 class, we must be very careful; consider:
9175 { template <class V>
9176 friend struct S1; };
9178 Here, the S2::S1 declaration should not be confused with the
9179 outer declaration. In particular, the inner version should
9180 have a template parameter of level 2, not level 1. This
9181 would be particularly important if the member declaration
9184 template <class V = U> friend struct S1;
9186 say, when we should tsubst into `U' when instantiating
9187 S2. On the other hand, when presented with:
9197 we must find the inner binding eventually. We
9198 accomplish this by making sure that the new type we
9199 create to represent this declaration has the right
9201 context = TYPE_CONTEXT (t);
9207 /* If no such tag is yet defined, create a forward-reference node
9208 and record it as the "definition".
9209 When a real declaration of this type is found,
9210 the forward-reference will be altered into a real type. */
9211 if (code == ENUMERAL_TYPE)
9213 error ("use of enum %q#D without previous declaration", name);
9214 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9218 t = make_aggr_type (code);
9219 TYPE_CONTEXT (t) = context;
9220 /* pushtag only cares whether SCOPE is zero or not. */
9221 t = pushtag (name, t, scope != ts_current);
9226 if (template_header_p && IS_AGGR_TYPE (t))
9227 redeclare_class_template (t, current_template_parms);
9228 else if (!processing_template_decl
9230 && CLASSTYPE_IS_TEMPLATE (t))
9232 error ("redeclaration of %qT as a non-template", t);
9233 t = error_mark_node;
9237 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9241 xref_tag_from_type (tree old, tree id, tag_scope scope)
9243 enum tag_types tag_kind;
9245 if (TREE_CODE (old) == RECORD_TYPE)
9246 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9248 tag_kind = union_type;
9250 if (id == NULL_TREE)
9251 id = TYPE_IDENTIFIER (old);
9253 return xref_tag (tag_kind, id, scope, false);
9256 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9257 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9258 access_* node, and the TREE_VALUE is the type of the base-class.
9259 Non-NULL TREE_TYPE indicates virtual inheritance. */
9262 xref_basetypes (tree ref, tree base_list)
9265 tree binfo, base_binfo;
9266 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9267 unsigned max_bases = 0; /* Maximum direct bases. */
9269 tree default_access;
9270 tree igo_prev; /* Track Inheritance Graph Order. */
9272 if (ref == error_mark_node)
9275 /* The base of a derived class is private by default, all others are
9277 default_access = (TREE_CODE (ref) == RECORD_TYPE
9278 && CLASSTYPE_DECLARED_CLASS (ref)
9279 ? access_private_node : access_public_node);
9281 /* First, make sure that any templates in base-classes are
9282 instantiated. This ensures that if we call ourselves recursively
9283 we do not get confused about which classes are marked and which
9288 tree basetype = TREE_VALUE (*basep);
9290 if (!(processing_template_decl && uses_template_parms (basetype))
9291 && !complete_type_or_else (basetype, NULL))
9292 /* An incomplete type. Remove it from the list. */
9293 *basep = TREE_CHAIN (*basep);
9297 if (TREE_TYPE (*basep))
9299 if (CLASS_TYPE_P (basetype))
9300 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9301 basep = &TREE_CHAIN (*basep);
9305 TYPE_MARKED_P (ref) = 1;
9307 /* The binfo slot should be empty, unless this is an (ill-formed)
9309 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9310 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9312 binfo = make_tree_binfo (max_bases);
9314 TYPE_BINFO (ref) = binfo;
9315 BINFO_OFFSET (binfo) = size_zero_node;
9316 BINFO_TYPE (binfo) = ref;
9320 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, max_bases);
9321 /* An aggregate cannot have baseclasses. */
9322 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9324 if (TREE_CODE (ref) == UNION_TYPE)
9325 error ("derived union %qT invalid", ref);
9330 if (TYPE_FOR_JAVA (ref))
9331 error ("Java class %qT cannot have multiple bases", ref);
9336 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, max_vbases);
9338 if (TYPE_FOR_JAVA (ref))
9339 error ("Java class %qT cannot have virtual bases", ref);
9342 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9344 tree access = TREE_PURPOSE (base_list);
9345 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9346 tree basetype = TREE_VALUE (base_list);
9348 if (access == access_default_node)
9349 access = default_access;
9351 if (TREE_CODE (basetype) == TYPE_DECL)
9352 basetype = TREE_TYPE (basetype);
9353 if (TREE_CODE (basetype) != RECORD_TYPE
9354 && TREE_CODE (basetype) != TYPENAME_TYPE
9355 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9356 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9358 error ("base type %qT fails to be a struct or class type",
9363 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9364 TYPE_FOR_JAVA (ref) = 1;
9366 base_binfo = NULL_TREE;
9367 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9369 base_binfo = TYPE_BINFO (basetype);
9370 /* The original basetype could have been a typedef'd type. */
9371 basetype = BINFO_TYPE (base_binfo);
9373 /* Inherit flags from the base. */
9374 TYPE_HAS_NEW_OPERATOR (ref)
9375 |= TYPE_HAS_NEW_OPERATOR (basetype);
9376 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9377 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9378 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9379 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9380 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9381 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9382 CLASSTYPE_REPEATED_BASE_P (ref)
9383 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9386 /* We must do this test after we've seen through a typedef
9388 if (TYPE_MARKED_P (basetype))
9390 if (basetype == ref)
9391 error ("recursive type %qT undefined", basetype);
9393 error ("duplicate base type %qT invalid", basetype);
9396 TYPE_MARKED_P (basetype) = 1;
9398 base_binfo = copy_binfo (base_binfo, basetype, ref,
9399 &igo_prev, via_virtual);
9400 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9401 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9403 BINFO_BASE_APPEND (binfo, base_binfo);
9404 BINFO_BASE_ACCESS_APPEND (binfo, access);
9407 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9408 /* If we have space in the vbase vector, we must have shared at
9409 least one of them, and are therefore diamond shaped. */
9410 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9412 /* Unmark all the types. */
9413 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9414 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9415 TYPE_MARKED_P (ref) = 0;
9417 /* Now see if we have a repeated base type. */
9418 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9420 for (base_binfo = binfo; base_binfo;
9421 base_binfo = TREE_CHAIN (base_binfo))
9423 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9425 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9428 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9430 for (base_binfo = binfo; base_binfo;
9431 base_binfo = TREE_CHAIN (base_binfo))
9432 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9433 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9440 /* Begin compiling the definition of an enumeration type.
9442 Returns the type object, as yet incomplete.
9443 Also records info about it so that build_enumerator
9444 may be used to declare the individual values as they are read. */
9447 start_enum (tree name)
9451 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9453 /* If this is the real definition for a previous forward reference,
9454 fill in the contents in the same object that used to be the
9455 forward reference. */
9457 enumtype = lookup_and_check_tag (enum_type, name,
9458 /*tag_scope=*/ts_current,
9459 /*template_header_p=*/false);
9461 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9463 error ("multiple definition of %q#T", enumtype);
9464 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9465 /* Clear out TYPE_VALUES, and start again. */
9466 TYPE_VALUES (enumtype) = NULL_TREE;
9470 /* In case of error, make a dummy enum to allow parsing to
9472 if (enumtype == error_mark_node)
9473 name = make_anon_name ();
9475 enumtype = make_node (ENUMERAL_TYPE);
9476 enumtype = pushtag (name, enumtype, 0);
9482 /* After processing and defining all the values of an enumeration type,
9483 install their decls in the enumeration type and finish it off.
9484 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9487 finish_enum (tree enumtype)
9496 bool use_short_enum;
9500 integer_type_kind itk;
9501 tree underlying_type = NULL_TREE;
9503 /* We built up the VALUES in reverse order. */
9504 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9506 /* For an enum defined in a template, just set the type of the values;
9507 all further processing is postponed until the template is
9508 instantiated. We need to set the type so that tsubst of a CONST_DECL
9510 if (processing_template_decl)
9512 for (values = TYPE_VALUES (enumtype);
9514 values = TREE_CHAIN (values))
9515 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9516 if (at_function_scope_p ())
9517 add_stmt (build_min (TAG_DEFN, enumtype));
9521 /* Determine the minimum and maximum values of the enumerators. */
9522 if (TYPE_VALUES (enumtype))
9524 minnode = maxnode = NULL_TREE;
9526 for (values = TYPE_VALUES (enumtype);
9528 values = TREE_CHAIN (values))
9530 decl = TREE_VALUE (values);
9532 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9533 each enumerator has the type of its enumeration. Prior to the
9534 closing brace, the type of each enumerator is the type of its
9535 initializing value. */
9536 TREE_TYPE (decl) = enumtype;
9538 /* Update the minimum and maximum values, if appropriate. */
9539 value = DECL_INITIAL (decl);
9540 /* Figure out what the minimum and maximum values of the
9543 minnode = maxnode = value;
9544 else if (tree_int_cst_lt (maxnode, value))
9546 else if (tree_int_cst_lt (value, minnode))
9553 If the enumerator-list is empty, the underlying type is as if
9554 the enumeration had a single enumerator with value 0. */
9555 minnode = maxnode = integer_zero_node;
9557 /* Compute the number of bits require to represent all values of the
9558 enumeration. We must do this before the type of MINNODE and
9559 MAXNODE are transformed, since min_precision relies on the
9560 TREE_TYPE of the value it is passed. */
9561 unsignedp = tree_int_cst_sgn (minnode) >= 0;
9562 lowprec = min_precision (minnode, unsignedp);
9563 highprec = min_precision (maxnode, unsignedp);
9564 precision = MAX (lowprec, highprec);
9566 /* Determine the underlying type of the enumeration.
9570 The underlying type of an enumeration is an integral type that
9571 can represent all the enumerator values defined in the
9572 enumeration. It is implementation-defined which integral type is
9573 used as the underlying type for an enumeration except that the
9574 underlying type shall not be larger than int unless the value of
9575 an enumerator cannot fit in an int or unsigned int.
9577 We use "int" or an "unsigned int" as the underlying type, even if
9578 a smaller integral type would work, unless the user has
9579 explicitly requested that we use the smallest possible type. The
9580 user can request that for all enumerations with a command line
9581 flag, or for just one enumeration with an attribute. */
9583 use_short_enum = flag_short_enums
9584 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
9586 for (itk = (use_short_enum ? itk_char : itk_int);
9590 underlying_type = integer_types[itk];
9591 if (TYPE_PRECISION (underlying_type) >= precision
9592 && TYPE_UNSIGNED (underlying_type) == unsignedp)
9595 if (itk == itk_none)
9599 IF no integral type can represent all the enumerator values, the
9600 enumeration is ill-formed. */
9601 error ("no integral type can represent all of the enumerator values "
9602 "for %qT", enumtype);
9603 precision = TYPE_PRECISION (long_long_integer_type_node);
9604 underlying_type = integer_types[itk_unsigned_long_long];
9607 /* Compute the minium and maximum values for the type.
9611 For an enumeration where emin is the smallest enumerator and emax
9612 is the largest, the values of the enumeration are the values of the
9613 underlying type in the range bmin to bmax, where bmin and bmax are,
9614 respectively, the smallest and largest values of the smallest bit-
9615 field that can store emin and emax. */
9617 /* The middle-end currently assumes that types with TYPE_PRECISION
9618 narrower than their underlying type are suitably zero or sign
9619 extended to fill their mode. g++ doesn't make these guarantees.
9620 Until the middle-end can represent such paradoxical types, we
9621 set the TYPE_PRECISION to the width of the underlying type. */
9622 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
9624 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
9628 The value of sizeof() applied to an enumeration type, an object
9629 of an enumeration type, or an enumerator, is the value of sizeof()
9630 applied to the underlying type. */
9631 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
9632 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
9633 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
9634 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
9635 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
9636 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
9638 /* Convert each of the enumerators to the type of the underlying
9639 type of the enumeration. */
9640 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
9642 decl = TREE_VALUE (values);
9643 value = perform_implicit_conversion (underlying_type,
9644 DECL_INITIAL (decl));
9646 /* Do not clobber shared ints. */
9647 value = copy_node (value);
9649 TREE_TYPE (value) = enumtype;
9650 DECL_INITIAL (decl) = value;
9651 TREE_VALUE (values) = value;
9654 /* Fix up all variant types of this enum type. */
9655 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
9657 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
9658 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
9659 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
9660 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
9661 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
9662 TYPE_MODE (t) = TYPE_MODE (enumtype);
9663 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
9664 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
9665 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
9666 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
9669 /* Finish debugging output for this type. */
9670 rest_of_type_compilation (enumtype, namespace_bindings_p ());
9673 /* Build and install a CONST_DECL for an enumeration constant of the
9674 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9675 Assignment of sequential values by default is handled here. */
9678 build_enumerator (tree name, tree value, tree enumtype)
9684 /* If the VALUE was erroneous, pretend it wasn't there; that will
9685 result in the enum being assigned the next value in sequence. */
9686 if (value == error_mark_node)
9689 /* Remove no-op casts from the value. */
9691 STRIP_TYPE_NOPS (value);
9693 if (! processing_template_decl)
9695 /* Validate and default VALUE. */
9696 if (value != NULL_TREE)
9698 value = integral_constant_value (value);
9700 if (TREE_CODE (value) == INTEGER_CST)
9702 value = perform_integral_promotions (value);
9703 constant_expression_warning (value);
9707 error ("enumerator value for %qD not integer constant", name);
9712 /* Default based on previous value. */
9713 if (value == NULL_TREE)
9715 if (TYPE_VALUES (enumtype))
9718 unsigned HOST_WIDE_INT lo;
9722 /* The next value is the previous value plus one. We can
9723 safely assume that the previous value is an INTEGER_CST.
9724 add_double doesn't know the type of the target expression,
9725 so we must check with int_fits_type_p as well. */
9726 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
9727 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
9728 TREE_INT_CST_HIGH (prev_value),
9730 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
9731 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
9734 error ("overflow in enumeration values at %qD", name);
9737 value = integer_zero_node;
9740 /* Remove no-op casts from the value. */
9741 STRIP_TYPE_NOPS (value);
9744 /* C++ associates enums with global, function, or class declarations. */
9745 context = current_scope ();
9747 /* Build the actual enumeration constant. Note that the enumeration
9748 constants have the type of their initializers until the
9749 enumeration is complete:
9753 Following the closing brace of an enum-specifier, each enumer-
9754 ator has the type of its enumeration. Prior to the closing
9755 brace, the type of each enumerator is the type of its
9758 In finish_enum we will reset the type. Of course, if we're
9759 processing a template, there may be no value. */
9760 type = value ? TREE_TYPE (value) : NULL_TREE;
9762 if (context && context == current_class_type)
9763 /* This enum declaration is local to the class. We need the full
9764 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9765 decl = build_lang_decl (CONST_DECL, name, type);
9767 /* It's a global enum, or it's local to a function. (Note local to
9768 a function could mean local to a class method. */
9769 decl = build_decl (CONST_DECL, name, type);
9771 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
9772 TREE_CONSTANT (decl) = 1;
9773 TREE_INVARIANT (decl) = 1;
9774 TREE_READONLY (decl) = 1;
9775 DECL_INITIAL (decl) = value;
9777 if (context && context == current_class_type)
9778 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9779 on the TYPE_FIELDS list for `S'. (That's so that you can say
9780 things like `S::i' later.) */
9781 finish_member_declaration (decl);
9785 /* Add this enumeration constant to the list for this type. */
9786 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
9790 /* We're defining DECL. Make sure that it's type is OK. */
9793 check_function_type (tree decl, tree current_function_parms)
9795 tree fntype = TREE_TYPE (decl);
9796 tree return_type = complete_type (TREE_TYPE (fntype));
9798 /* In a function definition, arg types must be complete. */
9799 require_complete_types_for_parms (current_function_parms);
9801 if (dependent_type_p (return_type))
9803 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
9805 error ("return type %q#T is incomplete", TREE_TYPE (fntype));
9807 /* Make it return void instead, but don't change the
9808 type of the DECL_RESULT, in case we have a named return value. */
9809 if (TREE_CODE (fntype) == METHOD_TYPE)
9811 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
9813 = build_method_type_directly (ctype,
9815 FUNCTION_ARG_CHAIN (decl));
9819 = build_function_type (void_type_node,
9820 TYPE_ARG_TYPES (TREE_TYPE (decl)));
9822 = build_exception_variant (fntype,
9823 TYPE_RAISES_EXCEPTIONS (fntype));
9826 abstract_virtuals_error (decl, TREE_TYPE (fntype));
9829 /* Create the FUNCTION_DECL for a function definition.
9830 DECLSPECS and DECLARATOR are the parts of the declaration;
9831 they describe the function's name and the type it returns,
9832 but twisted together in a fashion that parallels the syntax of C.
9834 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9835 DECLARATOR is really the DECL for the function we are about to
9836 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9837 indicating that the function is an inline defined in-class.
9839 This function creates a binding context for the function body
9840 as well as setting up the FUNCTION_DECL in current_function_decl.
9842 For C++, we must first check whether that datum makes any sense.
9843 For example, "class A local_a(1,2);" means that variable local_a
9844 is an aggregate of type A, which should have a constructor
9845 applied to it with the argument list [1, 2]. */
9848 start_preparsed_function (tree decl1, tree attrs, int flags)
9850 tree ctype = NULL_TREE;
9853 int doing_friend = 0;
9854 struct cp_binding_level *bl;
9855 tree current_function_parms;
9856 struct c_fileinfo *finfo = get_fileinfo (lbasename (input_filename));
9859 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
9860 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
9862 fntype = TREE_TYPE (decl1);
9863 if (TREE_CODE (fntype) == METHOD_TYPE)
9864 ctype = TYPE_METHOD_BASETYPE (fntype);
9866 /* ISO C++ 11.4/5. A friend function defined in a class is in
9867 the (lexical) scope of the class in which it is defined. */
9868 if (!ctype && DECL_FRIEND_P (decl1))
9870 ctype = DECL_FRIEND_CONTEXT (decl1);
9872 /* CTYPE could be null here if we're dealing with a template;
9873 for example, `inline friend float foo()' inside a template
9874 will have no CTYPE set. */
9875 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
9881 if (DECL_DECLARED_INLINE_P (decl1)
9882 && lookup_attribute ("noinline", attrs))
9883 warning ("%Jinline function %qD given attribute noinline", decl1, decl1);
9885 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
9886 /* This is a constructor, we must ensure that any default args
9887 introduced by this definition are propagated to the clones
9888 now. The clones are used directly in overload resolution. */
9889 adjust_clone_args (decl1);
9891 /* Sometimes we don't notice that a function is a static member, and
9892 build a METHOD_TYPE for it. Fix that up now. */
9893 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
9894 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
9896 revert_static_member_fn (decl1);
9900 /* Set up current_class_type, and enter the scope of the class, if
9903 push_nested_class (ctype);
9904 else if (DECL_STATIC_FUNCTION_P (decl1))
9905 push_nested_class (DECL_CONTEXT (decl1));
9907 /* Now that we have entered the scope of the class, we must restore
9908 the bindings for any template parameters surrounding DECL1, if it
9909 is an inline member template. (Order is important; consider the
9910 case where a template parameter has the same name as a field of
9911 the class.) It is not until after this point that
9912 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
9913 if (flags & SF_INCLASS_INLINE)
9914 maybe_begin_member_template_processing (decl1);
9916 /* Effective C++ rule 15. */
9918 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
9919 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
9920 warning ("%<operator=%> should return a reference to %<*this%>");
9922 /* Make the init_value nonzero so pushdecl knows this is not tentative.
9923 error_mark_node is replaced below (in poplevel) with the BLOCK. */
9924 if (!DECL_INITIAL (decl1))
9925 DECL_INITIAL (decl1) = error_mark_node;
9927 /* This function exists in static storage.
9928 (This does not mean `static' in the C sense!) */
9929 TREE_STATIC (decl1) = 1;
9931 /* We must call push_template_decl after current_class_type is set
9932 up. (If we are processing inline definitions after exiting a
9933 class scope, current_class_type will be NULL_TREE until set above
9934 by push_nested_class.) */
9935 if (processing_template_decl)
9937 /* FIXME: Handle error_mark_node more gracefully. */
9938 tree newdecl1 = push_template_decl (decl1);
9939 if (newdecl1 != error_mark_node)
9943 /* We are now in the scope of the function being defined. */
9944 current_function_decl = decl1;
9946 /* Save the parm names or decls from this function's declarator
9947 where store_parm_decls will find them. */
9948 current_function_parms = DECL_ARGUMENTS (decl1);
9950 /* Make sure the parameter and return types are reasonable. When
9951 you declare a function, these types can be incomplete, but they
9952 must be complete when you define the function. */
9953 check_function_type (decl1, current_function_parms);
9955 /* Build the return declaration for the function. */
9956 restype = TREE_TYPE (fntype);
9957 /* Promote the value to int before returning it. */
9958 if (c_promoting_integer_type_p (restype))
9959 restype = type_promotes_to (restype);
9960 if (DECL_RESULT (decl1) == NULL_TREE)
9964 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
9965 DECL_ARTIFICIAL (resdecl) = 1;
9966 DECL_IGNORED_P (resdecl) = 1;
9967 DECL_RESULT (decl1) = resdecl;
9969 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
9972 /* Initialize RTL machinery. We cannot do this until
9973 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
9974 even when processing a template; this is how we get
9975 CFUN set up, and our per-function variables initialized.
9976 FIXME factor out the non-RTL stuff. */
9977 bl = current_binding_level;
9978 allocate_struct_function (decl1);
9979 current_binding_level = bl;
9981 /* Even though we're inside a function body, we still don't want to
9982 call expand_expr to calculate the size of a variable-sized array.
9983 We haven't necessarily assigned RTL to all variables yet, so it's
9984 not safe to try to expand expressions involving them. */
9985 cfun->x_dont_save_pending_sizes_p = 1;
9987 /* Start the statement-tree, start the tree now. */
9988 DECL_SAVED_TREE (decl1) = push_stmt_list ();
9990 /* Let the user know we're compiling this function. */
9991 announce_function (decl1);
9993 /* Record the decl so that the function name is defined.
9994 If we already have a decl for this name, and it is a FUNCTION_DECL,
9995 use the old decl. */
9996 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
9998 /* A specialization is not used to guide overload resolution. */
9999 if (!DECL_FUNCTION_MEMBER_P (decl1)
10000 && !(DECL_USE_TEMPLATE (decl1) &&
10001 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10003 tree olddecl = pushdecl (decl1);
10005 if (olddecl == error_mark_node)
10006 /* If something went wrong when registering the declaration,
10007 use DECL1; we have to have a FUNCTION_DECL to use when
10008 parsing the body of the function. */
10011 /* Otherwise, OLDDECL is either a previous declaration of
10012 the same function or DECL1 itself. */
10017 /* We need to set the DECL_CONTEXT. */
10018 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10019 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10020 /* And make sure we have enough default args. */
10021 check_default_args (decl1);
10023 fntype = TREE_TYPE (decl1);
10026 /* Determine the ELF visibility attribute for the function. We must
10027 not do this before calling "pushdecl", as we must allow
10028 "duplicate_decls" to merge any attributes appropriately. */
10029 if (!DECL_CLONED_FUNCTION_P (decl1))
10030 determine_visibility (decl1);
10032 /* Reset these in case the call to pushdecl changed them. */
10033 current_function_decl = decl1;
10034 cfun->decl = decl1;
10036 /* If we are (erroneously) defining a function that we have already
10037 defined before, wipe out what we knew before. */
10038 if (!DECL_PENDING_INLINE_P (decl1))
10039 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10041 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10043 /* We know that this was set up by `grokclassfn'. We do not
10044 wait until `store_parm_decls', since evil parse errors may
10045 never get us to that point. Here we keep the consistency
10046 between `current_class_type' and `current_class_ptr'. */
10047 tree t = DECL_ARGUMENTS (decl1);
10049 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10050 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10052 cp_function_chain->x_current_class_ref
10053 = build_indirect_ref (t, NULL);
10054 cp_function_chain->x_current_class_ptr = t;
10056 /* Constructors and destructors need to know whether they're "in
10057 charge" of initializing virtual base classes. */
10058 t = TREE_CHAIN (t);
10059 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10061 current_in_charge_parm = t;
10062 t = TREE_CHAIN (t);
10064 if (DECL_HAS_VTT_PARM_P (decl1))
10066 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10067 current_vtt_parm = t;
10071 if (DECL_INTERFACE_KNOWN (decl1))
10073 tree ctx = decl_function_context (decl1);
10075 if (DECL_NOT_REALLY_EXTERN (decl1))
10076 DECL_EXTERNAL (decl1) = 0;
10078 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10079 && TREE_PUBLIC (ctx))
10080 /* This is a function in a local class in an extern inline
10082 comdat_linkage (decl1);
10084 /* If this function belongs to an interface, it is public.
10085 If it belongs to someone else's interface, it is also external.
10086 This only affects inlines and template instantiations. */
10087 else if (finfo->interface_unknown == 0
10088 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
10090 if (DECL_DECLARED_INLINE_P (decl1)
10091 || DECL_TEMPLATE_INSTANTIATION (decl1)
10092 || processing_template_decl)
10094 DECL_EXTERNAL (decl1)
10095 = (finfo->interface_only
10096 || (DECL_DECLARED_INLINE_P (decl1)
10097 && ! flag_implement_inlines
10098 && !DECL_VINDEX (decl1)));
10100 /* For WIN32 we also want to put these in linkonce sections. */
10101 maybe_make_one_only (decl1);
10104 DECL_EXTERNAL (decl1) = 0;
10105 DECL_NOT_REALLY_EXTERN (decl1) = 0;
10106 DECL_INTERFACE_KNOWN (decl1) = 1;
10107 /* If this function is in an interface implemented in this file,
10108 make sure that the backend knows to emit this function
10110 if (!DECL_EXTERNAL (decl1))
10111 mark_needed (decl1);
10113 else if (finfo->interface_unknown && finfo->interface_only
10114 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
10116 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10117 interface, we will have both finfo->interface_unknown and
10118 finfo->interface_only set. In that case, we don't want to
10119 use the normal heuristics because someone will supply a
10120 #pragma implementation elsewhere, and deducing it here would
10121 produce a conflict. */
10122 comdat_linkage (decl1);
10123 DECL_EXTERNAL (decl1) = 0;
10124 DECL_INTERFACE_KNOWN (decl1) = 1;
10125 DECL_DEFER_OUTPUT (decl1) = 1;
10129 /* This is a definition, not a reference.
10130 So clear DECL_EXTERNAL. */
10131 DECL_EXTERNAL (decl1) = 0;
10133 if ((DECL_DECLARED_INLINE_P (decl1)
10134 || DECL_TEMPLATE_INSTANTIATION (decl1))
10135 && ! DECL_INTERFACE_KNOWN (decl1)
10136 /* Don't try to defer nested functions for now. */
10137 && ! decl_function_context (decl1))
10138 DECL_DEFER_OUTPUT (decl1) = 1;
10140 DECL_INTERFACE_KNOWN (decl1) = 1;
10143 begin_scope (sk_function_parms, decl1);
10147 if (DECL_DESTRUCTOR_P (decl1)
10148 || (DECL_CONSTRUCTOR_P (decl1)
10149 && targetm.cxx.cdtor_returns_this ()))
10151 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10152 DECL_CONTEXT (cdtor_label) = current_function_decl;
10155 start_fname_decls ();
10157 store_parm_decls (current_function_parms);
10161 /* Like start_preparsed_function, except that instead of a
10162 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10164 Returns 1 on success. If the DECLARATOR is not suitable for a function
10165 (it defines a datum instead), we return 0, which tells
10166 yyparse to report a parse error. */
10169 start_function (cp_decl_specifier_seq *declspecs,
10170 const cp_declarator *declarator,
10175 if (have_extern_spec)
10177 declspecs->storage_class = sc_extern;
10178 /* This should only be done once on the outermost decl. */
10179 have_extern_spec = false;
10182 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10183 /* If the declarator is not suitable for a function definition,
10184 cause a syntax error. */
10185 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10188 /* If #pragma weak was used, mark the decl weak now. */
10189 if (global_scope_p (current_binding_level))
10190 maybe_apply_pragma_weak (decl1);
10192 if (DECL_MAIN_P (decl1))
10193 /* main must return int. grokfndecl should have corrected it
10194 (and issued a diagnostic) if the user got it wrong. */
10195 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10196 integer_type_node));
10198 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10203 /* Store the parameter declarations into the current function declaration.
10204 This is called after parsing the parameter declarations, before
10205 digesting the body of the function.
10207 Also install to binding contour return value identifier, if any. */
10210 store_parm_decls (tree current_function_parms)
10212 tree fndecl = current_function_decl;
10215 /* This is a chain of any other decls that came in among the parm
10216 declarations. If a parm is declared with enum {foo, bar} x;
10217 then CONST_DECLs for foo and bar are put here. */
10218 tree nonparms = NULL_TREE;
10220 if (current_function_parms)
10222 /* This case is when the function was defined with an ANSI prototype.
10223 The parms already have decls, so we need not do anything here
10224 except record them as in effect
10225 and complain if any redundant old-style parm decls were written. */
10227 tree specparms = current_function_parms;
10230 /* Must clear this because it might contain TYPE_DECLs declared
10232 current_binding_level->names = NULL;
10234 /* If we're doing semantic analysis, then we'll call pushdecl
10235 for each of these. We must do them in reverse order so that
10236 they end in the correct forward order. */
10237 specparms = nreverse (specparms);
10239 for (parm = specparms; parm; parm = next)
10241 next = TREE_CHAIN (parm);
10242 if (TREE_CODE (parm) == PARM_DECL)
10244 if (DECL_NAME (parm) == NULL_TREE
10245 || TREE_CODE (parm) != VOID_TYPE)
10248 error ("parameter %qD declared void", parm);
10252 /* If we find an enum constant or a type tag,
10253 put it aside for the moment. */
10254 TREE_CHAIN (parm) = NULL_TREE;
10255 nonparms = chainon (nonparms, parm);
10259 /* Get the decls in their original chain order and record in the
10260 function. This is all and only the PARM_DECLs that were
10261 pushed into scope by the loop above. */
10262 DECL_ARGUMENTS (fndecl) = getdecls ();
10265 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10267 /* Now store the final chain of decls for the arguments
10268 as the decl-chain of the current lexical scope.
10269 Put the enumerators in as well, at the front so that
10270 DECL_ARGUMENTS is not modified. */
10271 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10273 /* For a cloned function, we've already got all the code we need;
10274 there's no need to add any extra bits. */
10275 if (!DECL_CLONED_FUNCTION_P (fndecl))
10277 /* Do the starting of the exception specifications, if we have any. */
10278 if (flag_exceptions && !processing_template_decl
10279 && flag_enforce_eh_specs
10280 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10281 current_eh_spec_block = begin_eh_spec_block ();
10286 /* We have finished doing semantic analysis on DECL, but have not yet
10287 generated RTL for its body. Save away our current state, so that
10288 when we want to generate RTL later we know what to do. */
10291 save_function_data (tree decl)
10293 struct language_function *f;
10295 /* Save the language-specific per-function data so that we can
10296 get it back when we really expand this function. */
10297 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10300 f = GGC_NEW (struct language_function);
10301 memcpy (f, cp_function_chain, sizeof (struct language_function));
10302 DECL_SAVED_FUNCTION_DATA (decl) = f;
10304 /* Clear out the bits we don't need. */
10305 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10306 f->x_named_label_uses = NULL;
10307 f->bindings = NULL;
10308 f->x_local_names = NULL;
10312 /* Set the return value of the constructor (if present). */
10315 finish_constructor_body (void)
10320 if (targetm.cxx.cdtor_returns_this ())
10322 /* Any return from a constructor will end up here. */
10323 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10325 val = DECL_ARGUMENTS (current_function_decl);
10326 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10327 DECL_RESULT (current_function_decl), val);
10328 /* Return the address of the object. */
10329 exprstmt = build_stmt (RETURN_EXPR, val);
10330 add_stmt (exprstmt);
10334 /* Do all the processing for the beginning of a destructor; set up the
10335 vtable pointers and cleanups for bases and members. */
10338 begin_destructor_body (void)
10341 tree compound_stmt;
10343 /* If the dtor is empty, and we know there is not any possible
10344 way we could use any vtable entries, before they are possibly
10345 set by a base class dtor, we don't have to setup the vtables,
10346 as we know that any base class dtor will set up any vtables
10347 it needs. We avoid MI, because one base class dtor can do a
10348 virtual dispatch to an overridden function that would need to
10349 have a non-related vtable set up, we cannot avoid setting up
10350 vtables in that case. We could change this to see if there
10351 is just one vtable.
10353 ??? In the destructor for a class, the vtables are set
10354 appropriately for that class. There will be no non-related
10355 vtables. jason 2001-12-11. */
10356 if_stmt = begin_if_stmt ();
10358 /* If it is not safe to avoid setting up the vtables, then
10359 someone will change the condition to be boolean_true_node.
10360 (Actually, for now, we do not have code to set the condition
10361 appropriately, so we just assume that we always need to
10362 initialize the vtables.) */
10363 finish_if_stmt_cond (boolean_true_node, if_stmt);
10365 compound_stmt = begin_compound_stmt (0);
10367 /* Make all virtual function table pointers in non-virtual base
10368 classes point to CURRENT_CLASS_TYPE's virtual function
10370 initialize_vtbl_ptrs (current_class_ptr);
10372 finish_compound_stmt (compound_stmt);
10373 finish_then_clause (if_stmt);
10374 finish_if_stmt (if_stmt);
10376 /* And insert cleanups for our bases and members so that they
10377 will be properly destroyed if we throw. */
10378 push_base_cleanups ();
10381 /* At the end of every destructor we generate code to delete the object if
10382 necessary. Do that now. */
10385 finish_destructor_body (void)
10389 /* Any return from a destructor will end up here; that way all base
10390 and member cleanups will be run when the function returns. */
10391 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10393 /* In a virtual destructor, we must call delete. */
10394 if (DECL_VIRTUAL_P (current_function_decl))
10397 tree virtual_size = cxx_sizeof (current_class_type);
10401 At the point of definition of a virtual destructor (including
10402 an implicit definition), non-placement operator delete shall
10403 be looked up in the scope of the destructor's class and if
10404 found shall be accessible and unambiguous. */
10405 exprstmt = build_op_delete_call
10406 (DELETE_EXPR, current_class_ptr, virtual_size,
10407 /*global_p=*/false, NULL_TREE);
10409 if_stmt = begin_if_stmt ();
10410 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10411 current_in_charge_parm,
10414 finish_expr_stmt (exprstmt);
10415 finish_then_clause (if_stmt);
10416 finish_if_stmt (if_stmt);
10419 if (targetm.cxx.cdtor_returns_this ())
10423 val = DECL_ARGUMENTS (current_function_decl);
10424 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10425 DECL_RESULT (current_function_decl), val);
10426 /* Return the address of the object. */
10427 exprstmt = build_stmt (RETURN_EXPR, val);
10428 add_stmt (exprstmt);
10432 /* Do the necessary processing for the beginning of a function body, which
10433 in this case includes member-initializers, but not the catch clauses of
10434 a function-try-block. Currently, this means opening a binding level
10435 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10436 In other functions, this isn't necessary, but it doesn't hurt. */
10439 begin_function_body (void)
10443 if (processing_template_decl)
10444 /* Do nothing now. */;
10446 /* Always keep the BLOCK node associated with the outermost pair of
10447 curly braces of a function. These are needed for correct
10448 operation of dwarfout.c. */
10449 keep_next_level (true);
10451 stmt = begin_compound_stmt (BCS_FN_BODY);
10453 if (processing_template_decl)
10454 /* Do nothing now. */;
10455 else if (DECL_DESTRUCTOR_P (current_function_decl))
10456 begin_destructor_body ();
10461 /* Do the processing for the end of a function body. Currently, this means
10462 closing out the cleanups for fully-constructed bases and members, and in
10463 the case of the destructor, deleting the object if desired. Again, this
10464 is only meaningful for [cd]tors, since they are the only functions where
10465 there is a significant distinction between the main body and any
10466 function catch clauses. Handling, say, main() return semantics here
10467 would be wrong, as flowing off the end of a function catch clause for
10468 main() would also need to return 0. */
10471 finish_function_body (tree compstmt)
10473 /* Close the block. */
10474 finish_compound_stmt (compstmt);
10476 if (processing_template_decl)
10477 /* Do nothing now. */;
10478 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10479 finish_constructor_body ();
10480 else if (DECL_DESTRUCTOR_P (current_function_decl))
10481 finish_destructor_body ();
10484 /* Finish up a function declaration and compile that function
10485 all the way to assembler language output. The free the storage
10486 for the function definition.
10488 FLAGS is a bitwise or of the following values:
10490 We just finished processing the body of an in-class inline
10491 function definition. (This processing will have taken place
10492 after the class definition is complete.) */
10495 finish_function (int flags)
10497 tree fndecl = current_function_decl;
10498 tree fntype, ctype = NULL_TREE;
10499 int inclass_inline = (flags & 2) != 0;
10502 /* When we get some parse errors, we can end up without a
10503 current_function_decl, so cope. */
10504 if (fndecl == NULL_TREE)
10505 return error_mark_node;
10507 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10508 && DECL_VIRTUAL_P (fndecl)
10509 && !processing_template_decl)
10511 tree fnclass = DECL_CONTEXT (fndecl);
10512 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10513 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10516 nested = function_depth > 1;
10517 fntype = TREE_TYPE (fndecl);
10519 /* TREE_READONLY (fndecl) = 1;
10520 This caused &foo to be of type ptr-to-const-function
10521 which then got a warning when stored in a ptr-to-function variable. */
10523 gcc_assert (building_stmt_tree ());
10525 /* For a cloned function, we've already got all the code we need;
10526 there's no need to add any extra bits. */
10527 if (!DECL_CLONED_FUNCTION_P (fndecl))
10529 if (DECL_MAIN_P (current_function_decl))
10533 /* Make it so that `main' always returns 0 by default (or
10536 stmt = finish_return_stmt (integer_one_node);
10538 stmt = finish_return_stmt (integer_zero_node);
10540 /* Hack. We don't want the middle-end to warn that this
10541 return is unreachable, so put the statement on the
10543 annotate_with_file_line (stmt, input_filename, 0);
10546 /* Finish dealing with exception specifiers. */
10547 if (flag_exceptions && !processing_template_decl
10548 && flag_enforce_eh_specs
10549 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10550 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10551 (TREE_TYPE (current_function_decl)),
10552 current_eh_spec_block);
10555 /* If we're saving up tree structure, tie off the function now. */
10556 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
10558 finish_fname_decls ();
10560 /* If this function can't throw any exceptions, remember that. */
10561 if (!processing_template_decl
10562 && !cp_function_chain->can_throw
10563 && !flag_non_call_exceptions)
10564 TREE_NOTHROW (fndecl) = 1;
10566 /* This must come after expand_function_end because cleanups might
10567 have declarations (from inline functions) that need to go into
10568 this function's blocks. */
10570 /* If the current binding level isn't the outermost binding level
10571 for this function, either there is a bug, or we have experienced
10572 syntax errors and the statement tree is malformed. */
10573 if (current_binding_level->kind != sk_function_parms)
10575 /* Make sure we have already experienced errors. */
10576 gcc_assert (errorcount);
10578 /* Throw away the broken statement tree and extra binding
10580 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
10582 while (current_binding_level->kind != sk_function_parms)
10584 if (current_binding_level->kind == sk_class)
10585 pop_nested_class ();
10587 poplevel (0, 0, 0);
10590 poplevel (1, 0, 1);
10592 /* Statements should always be full-expressions at the outermost set
10593 of curly braces for a function. */
10594 gcc_assert (stmts_are_full_exprs_p ());
10596 /* Set up the named return value optimization, if we can. Candidate
10597 variables are selected in check_return_value. */
10598 if (current_function_return_value)
10600 tree r = current_function_return_value;
10603 if (r != error_mark_node
10604 /* This is only worth doing for fns that return in memory--and
10605 simpler, since we don't have to worry about promoted modes. */
10606 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
10607 /* Only allow this for variables declared in the outer scope of
10608 the function so we know that their lifetime always ends with a
10609 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10610 we were to do this optimization in tree-ssa. */
10611 && (outer = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl)))
10612 /* Skip the artificial function body block. */
10613 && (outer = BLOCK_SUBBLOCKS (outer))
10614 && chain_member (r, BLOCK_VARS (outer)))
10615 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
10617 current_function_return_value = NULL_TREE;
10620 /* Remember that we were in class scope. */
10621 if (current_class_name)
10622 ctype = current_class_type;
10624 /* Must mark the RESULT_DECL as being in this function. */
10625 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
10627 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10628 to the FUNCTION_DECL node itself. */
10629 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
10631 /* Save away current state, if appropriate. */
10632 if (!processing_template_decl)
10633 save_function_data (fndecl);
10635 /* Complain if there's just no return statement. */
10636 if (warn_return_type
10637 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
10638 && !dependent_type_p (TREE_TYPE (fntype))
10639 && !current_function_returns_value && !current_function_returns_null
10640 /* Don't complain if we abort or throw. */
10641 && !current_function_returns_abnormally
10642 && !DECL_NAME (DECL_RESULT (fndecl))
10643 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10644 inline function, as we might never be compiled separately. */
10645 && (DECL_INLINE (fndecl) || processing_template_decl)
10646 /* Structor return values (if any) are set by the compiler. */
10647 && !DECL_CONSTRUCTOR_P (fndecl)
10648 && !DECL_DESTRUCTOR_P (fndecl))
10649 warning ("no return statement in function returning non-void");
10651 /* Store the end of the function, so that we get good line number
10652 info for the epilogue. */
10653 cfun->function_end_locus = input_location;
10655 /* Genericize before inlining. */
10656 if (!processing_template_decl)
10658 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
10659 cp_genericize (fndecl);
10660 /* Clear out the bits we don't need. */
10661 f->x_current_class_ptr = NULL;
10662 f->x_current_class_ref = NULL;
10663 f->x_eh_spec_block = NULL;
10664 f->x_in_charge_parm = NULL;
10665 f->x_vtt_parm = NULL;
10666 f->x_return_value = NULL;
10667 f->bindings = NULL;
10669 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10670 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
10672 /* Clear out the bits we don't need. */
10673 local_names = NULL;
10674 named_label_uses = NULL;
10676 /* We're leaving the context of this function, so zap cfun. It's still in
10677 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10679 current_function_decl = NULL;
10681 /* If this is an in-class inline definition, we may have to pop the
10682 bindings for the template parameters that we added in
10683 maybe_begin_member_template_processing when start_function was
10685 if (inclass_inline)
10686 maybe_end_member_template_processing ();
10688 /* Leave the scope of the class. */
10690 pop_nested_class ();
10696 /* Let the error reporting routines know that we're outside a
10697 function. For a nested function, this value is used in
10698 cxx_pop_function_context and then reset via pop_function_context. */
10699 current_function_decl = NULL_TREE;
10704 /* Create the FUNCTION_DECL for a function definition.
10705 DECLSPECS and DECLARATOR are the parts of the declaration;
10706 they describe the return type and the name of the function,
10707 but twisted together in a fashion that parallels the syntax of C.
10709 This function creates a binding context for the function body
10710 as well as setting up the FUNCTION_DECL in current_function_decl.
10712 Returns a FUNCTION_DECL on success.
10714 If the DECLARATOR is not suitable for a function (it defines a datum
10715 instead), we return 0, which tells yyparse to report a parse error.
10717 May return void_type_node indicating that this method is actually
10718 a friend. See grokfield for more details.
10720 Came here with a `.pushlevel' .
10722 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10723 CHANGES TO CODE IN `grokfield'. */
10726 start_method (cp_decl_specifier_seq *declspecs,
10727 const cp_declarator *declarator, tree attrlist)
10729 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
10732 if (fndecl == error_mark_node)
10733 return error_mark_node;
10735 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
10737 error ("invalid member function declaration");
10738 return error_mark_node;
10742 cplus_decl_attributes (&fndecl, attrlist, 0);
10744 /* Pass friends other than inline friend functions back. */
10745 if (fndecl == void_type_node)
10748 if (DECL_IN_AGGR_P (fndecl))
10750 if (DECL_CONTEXT (fndecl)
10751 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
10752 error ("%qD is already defined in class %qT", fndecl,
10753 DECL_CONTEXT (fndecl));
10754 return void_type_node;
10757 check_template_shadow (fndecl);
10759 DECL_DECLARED_INLINE_P (fndecl) = 1;
10760 if (flag_default_inline)
10761 DECL_INLINE (fndecl) = 1;
10763 /* We process method specializations in finish_struct_1. */
10764 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
10766 fndecl = push_template_decl (fndecl);
10767 if (fndecl == error_mark_node)
10771 if (! DECL_FRIEND_P (fndecl))
10773 if (TREE_CHAIN (fndecl))
10775 fndecl = copy_node (fndecl);
10776 TREE_CHAIN (fndecl) = NULL_TREE;
10778 grok_special_member_properties (fndecl);
10781 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
10783 /* Make a place for the parms. */
10784 begin_scope (sk_function_parms, fndecl);
10786 DECL_IN_AGGR_P (fndecl) = 1;
10790 /* Go through the motions of finishing a function definition.
10791 We don't compile this method until after the whole class has
10794 FINISH_METHOD must return something that looks as though it
10795 came from GROKFIELD (since we are defining a method, after all).
10797 This is called after parsing the body of the function definition.
10798 STMTS is the chain of statements that makes up the function body.
10800 DECL is the ..._DECL that `start_method' provided. */
10803 finish_method (tree decl)
10805 tree fndecl = decl;
10810 if (decl == void_type_node)
10813 old_initial = DECL_INITIAL (fndecl);
10815 /* Undo the level for the parms (from start_method).
10816 This is like poplevel, but it causes nothing to be
10817 saved. Saving information here confuses symbol-table
10818 output routines. Besides, this information will
10819 be correctly output when this method is actually
10822 /* Clear out the meanings of the local variables of this level;
10823 also record in each decl which block it belongs to. */
10825 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
10827 if (DECL_NAME (link) != NULL_TREE)
10828 pop_binding (DECL_NAME (link), link);
10829 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
10830 DECL_CONTEXT (link) = NULL_TREE;
10833 poplevel (0, 0, 0);
10835 DECL_INITIAL (fndecl) = old_initial;
10837 /* We used to check if the context of FNDECL was different from
10838 current_class_type as another way to get inside here. This didn't work
10839 for String.cc in libg++. */
10840 if (DECL_FRIEND_P (fndecl))
10842 VEC_safe_push (tree, CLASSTYPE_INLINE_FRIENDS (current_class_type),
10844 decl = void_type_node;
10851 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10852 we can lay it out later, when and if its type becomes complete. */
10855 maybe_register_incomplete_var (tree var)
10857 gcc_assert (TREE_CODE (var) == VAR_DECL);
10859 /* Keep track of variables with incomplete types. */
10860 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
10861 && DECL_EXTERNAL (var))
10863 tree inner_type = TREE_TYPE (var);
10865 while (TREE_CODE (inner_type) == ARRAY_TYPE)
10866 inner_type = TREE_TYPE (inner_type);
10867 inner_type = TYPE_MAIN_VARIANT (inner_type);
10869 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
10870 /* RTTI TD entries are created while defining the type_info. */
10871 || (TYPE_LANG_SPECIFIC (inner_type)
10872 && TYPE_BEING_DEFINED (inner_type)))
10873 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
10877 /* Called when a class type (given by TYPE) is defined. If there are
10878 any existing VAR_DECLs whose type hsa been completed by this
10879 declaration, update them now. */
10882 complete_vars (tree type)
10884 tree *list = &incomplete_vars;
10886 gcc_assert (CLASS_TYPE_P (type));
10889 if (same_type_p (type, TREE_PURPOSE (*list)))
10891 tree var = TREE_VALUE (*list);
10892 tree type = TREE_TYPE (var);
10893 /* Complete the type of the variable. The VAR_DECL itself
10894 will be laid out in expand_expr. */
10895 complete_type (type);
10896 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
10897 /* Remove this entry from the list. */
10898 *list = TREE_CHAIN (*list);
10901 list = &TREE_CHAIN (*list);
10904 /* Check for pending declarations which may have abstract type. */
10905 complete_type_check_abstract (type);
10908 /* If DECL is of a type which needs a cleanup, build that cleanup
10912 cxx_maybe_build_cleanup (tree decl)
10914 tree type = TREE_TYPE (decl);
10916 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
10918 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
10920 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
10921 && CLASSTYPE_VBASECLASSES (type));
10923 if (TREE_CODE (type) == ARRAY_TYPE)
10927 cxx_mark_addressable (decl);
10928 rval = build_unary_op (ADDR_EXPR, decl, 0);
10931 /* Optimize for space over speed here. */
10932 if (!has_vbases || flag_expensive_optimizations)
10933 flags |= LOOKUP_NONVIRTUAL;
10935 rval = build_delete (TREE_TYPE (rval), rval,
10936 sfk_complete_destructor, flags, 0);
10943 /* When a stmt has been parsed, this function is called. */
10950 /* DECL was originally constructed as a non-static member function,
10951 but turned out to be static. Update it accordingly. */
10954 revert_static_member_fn (tree decl)
10957 tree function = TREE_TYPE (decl);
10958 tree args = TYPE_ARG_TYPES (function);
10960 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
10961 != TYPE_UNQUALIFIED)
10962 error ("static member function %q#D declared with type qualifiers", decl);
10964 args = TREE_CHAIN (args);
10965 tmp = build_function_type (TREE_TYPE (function), args);
10966 tmp = build_qualified_type (tmp, cp_type_quals (function));
10967 tmp = build_exception_variant (tmp,
10968 TYPE_RAISES_EXCEPTIONS (function));
10969 TREE_TYPE (decl) = tmp;
10970 if (DECL_ARGUMENTS (decl))
10971 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
10972 DECL_STATIC_FUNCTION_P (decl) = 1;
10975 /* Initialize the variables used during compilation of a C++
10979 cxx_push_function_context (struct function * f)
10981 struct language_function *p = GGC_CNEW (struct language_function);
10984 /* Whenever we start a new function, we destroy temporaries in the
10986 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
10992 if (DECL_SAVED_FUNCTION_DATA (fn))
10994 /* If we already parsed this function, and we're just expanding it
10995 now, restore saved state. */
10996 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
10998 /* We don't need the saved data anymore. Unless this is an inline
10999 function; we need the named return value info for
11000 declare_return_variable. */
11001 if (! DECL_INLINE (fn))
11002 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11007 /* Free the language-specific parts of F, now that we've finished
11008 compiling the function. */
11011 cxx_pop_function_context (struct function * f)
11016 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11017 one of the language-independent trees. */
11019 enum cp_tree_node_structure_enum
11020 cp_tree_node_structure (union lang_tree_node * t)
11022 switch (TREE_CODE (&t->generic))
11024 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11025 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11026 case OVERLOAD: return TS_CP_OVERLOAD;
11027 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11028 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11029 case PTRMEM_CST: return TS_CP_PTRMEM;
11030 case BASELINK: return TS_CP_BASELINK;
11031 default: return TS_CP_GENERIC;
11035 /* Build the void_list_node (void_type_node having been created). */
11037 build_void_list_node (void)
11039 tree t = build_tree_list (NULL_TREE, void_type_node);
11044 cp_missing_noreturn_ok_p (tree decl)
11046 /* A missing noreturn is ok for the `main' function. */
11047 return DECL_MAIN_P (decl);
11050 /* Return the COMDAT group into which DECL should be placed. */
11053 cxx_comdat_group (tree decl)
11057 /* Virtual tables, construction virtual tables, and virtual table
11058 tables all go in a single COMDAT group, named after the primary
11060 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11061 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11062 /* For all other DECLs, the COMDAT group is the mangled name of the
11063 declaration itself. */
11066 while (DECL_THUNK_P (decl))
11068 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11069 into the same section as the target function. In that case
11070 we must return target's name. */
11071 tree target = THUNK_TARGET (decl);
11072 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11073 && DECL_SECTION_NAME (target) != NULL
11074 && DECL_ONE_ONLY (target))
11079 name = DECL_ASSEMBLER_NAME (decl);
11082 return IDENTIFIER_POINTER (name);
11085 #include "gt-cp-decl.h"