1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
53 #include "tree-flow.h"
55 static tree grokparms (cp_parameter_declarator *, tree *);
56 static const char *redeclaration_error_message (tree, tree);
58 static int decl_jump_unsafe (tree);
59 static void require_complete_types_for_parms (tree);
60 static int ambi_op_p (enum tree_code);
61 static int unary_op_p (enum tree_code);
62 static void push_local_name (tree);
63 static tree grok_reference_init (tree, tree, tree, tree *);
64 static tree grokfndecl (tree, tree, tree, tree, tree, int,
65 enum overload_flags, cp_cv_quals,
66 tree, int, int, int, int, int, int, tree);
67 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
69 static void record_unknown_type (tree, const char *);
70 static tree builtin_function_1 (const char *, tree, tree,
71 enum built_in_function code,
72 enum built_in_class cl, const char *,
74 static tree build_library_fn_1 (tree, enum tree_code, tree);
75 static int member_function_or_else (tree, tree, enum overload_flags);
76 static void bad_specifiers (tree, const char *, int, int, int, int,
78 static void check_for_uninitialized_const_var (tree);
79 static hashval_t typename_hash (const void *);
80 static int typename_compare (const void *, const void *);
81 static tree local_variable_p_walkfn (tree *, int *, void *);
82 static tree record_builtin_java_type (const char *, int);
83 static const char *tag_name (enum tag_types code);
84 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
85 static int walk_globals_r (tree, void*);
86 static int walk_vtables_r (tree, void*);
87 static tree make_label_decl (tree, int);
88 static void use_label (tree);
89 static void check_previous_goto_1 (tree, struct cp_binding_level *, tree,
91 static void check_previous_goto (struct named_label_use_list *);
92 static void check_switch_goto (struct cp_binding_level *);
93 static void check_previous_gotos (tree);
94 static void pop_label (tree, tree);
95 static void pop_labels (tree);
96 static void maybe_deduce_size_from_array_init (tree, tree);
97 static void layout_var_decl (tree);
98 static void maybe_commonize_var (tree);
99 static tree check_initializer (tree, tree, int, tree *);
100 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
101 static void save_function_data (tree);
102 static void check_function_type (tree, tree);
103 static void finish_constructor_body (void);
104 static void begin_destructor_body (void);
105 static void finish_destructor_body (void);
106 static tree create_array_type_for_decl (tree, tree, tree);
107 static tree get_atexit_node (void);
108 static tree get_dso_handle_node (void);
109 static tree start_cleanup_fn (void);
110 static void end_cleanup_fn (void);
111 static tree cp_make_fname_decl (tree, int);
112 static void initialize_predefined_identifiers (void);
113 static tree check_special_function_return_type
114 (special_function_kind, tree, tree);
115 static tree push_cp_library_fn (enum tree_code, tree);
116 static tree build_cp_library_fn (tree, enum tree_code, tree);
117 static void store_parm_decls (tree);
118 static void initialize_local_var (tree, tree);
119 static void expand_static_init (tree, tree);
120 static tree next_initializable_field (tree);
121 static tree reshape_init (tree, tree *);
122 static tree build_typename_type (tree, tree, tree);
124 /* Erroneous argument lists can use this *IFF* they do not modify it. */
125 tree error_mark_list;
127 /* The following symbols are subsumed in the cp_global_trees array, and
128 listed here individually for documentation purposes.
131 tree wchar_decl_node;
133 tree vtable_entry_type;
134 tree delta_type_node;
135 tree __t_desc_type_node;
136 tree ti_desc_type_node;
137 tree bltn_desc_type_node, ptr_desc_type_node;
138 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
139 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
140 tree ptm_desc_type_node;
141 tree base_desc_type_node;
143 tree class_type_node;
144 tree unknown_type_node;
146 Array type `vtable_entry_type[]'
149 tree vtbl_ptr_type_node;
156 A FUNCTION_DECL which can call `abort'. Not necessarily the
157 one that the user will declare, but sufficient to be called
158 by routines that want to abort the program.
162 The FUNCTION_DECL for the default `::operator delete'.
164 tree global_delete_fndecl;
167 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
172 tree cp_global_trees[CPTI_MAX];
174 /* Indicates that there is a type value in some namespace, although
175 that is not necessarily in scope at the moment. */
177 tree global_type_node;
179 /* The node that holds the "name" of the global scope. */
180 tree global_scope_name;
182 /* Used only for jumps to as-yet undefined labels, since jumps to
183 defined labels can have their validity checked immediately. */
185 struct named_label_use_list GTY(())
187 struct cp_binding_level *binding_level;
190 location_t o_goto_locus;
191 struct named_label_use_list *next;
194 #define named_label_uses cp_function_chain->x_named_label_uses
196 #define local_names cp_function_chain->x_local_names
198 /* A list of objects which have constructors or destructors
199 which reside in the global scope. The decl is stored in
200 the TREE_VALUE slot and the initializer is stored
201 in the TREE_PURPOSE slot. */
202 tree static_aggregates;
206 /* A node for the integer constants 2, and 3. */
208 tree integer_two_node, integer_three_node;
210 /* A list of all LABEL_DECLs in the function that have names. Here so
211 we can clear out their names' definitions at the end of the
212 function, and so we can check the validity of jumps to these labels. */
214 struct named_label_list GTY(())
216 struct cp_binding_level *binding_level;
221 struct named_label_list *next;
222 unsigned int in_try_scope : 1;
223 unsigned int in_catch_scope : 1;
226 #define named_labels cp_function_chain->x_named_labels
228 /* The number of function bodies which we are currently processing.
229 (Zero if we are at namespace scope, one inside the body of a
230 function, two inside the body of a function in a local class, etc.) */
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
238 enum deprecated_states {
243 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
245 /* True if a declaration with an `extern' linkage specifier is being
247 bool have_extern_spec;
250 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
251 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
252 time the VAR_DECL was declared, the type was incomplete. */
254 static GTY(()) tree incomplete_vars;
256 /* Returns the kind of template specialization we are currently
257 processing, given that it's declaration contained N_CLASS_SCOPES
258 explicit scope qualifications. */
261 current_tmpl_spec_kind (int n_class_scopes)
263 int n_template_parm_scopes = 0;
264 int seen_specialization_p = 0;
265 int innermost_specialization_p = 0;
266 struct cp_binding_level *b;
268 /* Scan through the template parameter scopes. */
269 for (b = current_binding_level;
270 b->kind == sk_template_parms;
273 /* If we see a specialization scope inside a parameter scope,
274 then something is wrong. That corresponds to a declaration
277 template <class T> template <> ...
279 which is always invalid since [temp.expl.spec] forbids the
280 specialization of a class member template if the enclosing
281 class templates are not explicitly specialized as well. */
282 if (b->explicit_spec_p)
284 if (n_template_parm_scopes == 0)
285 innermost_specialization_p = 1;
287 seen_specialization_p = 1;
289 else if (seen_specialization_p == 1)
290 return tsk_invalid_member_spec;
292 ++n_template_parm_scopes;
295 /* Handle explicit instantiations. */
296 if (processing_explicit_instantiation)
298 if (n_template_parm_scopes != 0)
299 /* We've seen a template parameter list during an explicit
300 instantiation. For example:
302 template <class T> template void f(int);
304 This is erroneous. */
305 return tsk_invalid_expl_inst;
307 return tsk_expl_inst;
310 if (n_template_parm_scopes < n_class_scopes)
311 /* We've not seen enough template headers to match all the
312 specialized classes present. For example:
314 template <class T> void R<T>::S<T>::f(int);
316 This is invalid; there needs to be one set of template
317 parameters for each class. */
318 return tsk_insufficient_parms;
319 else if (n_template_parm_scopes == n_class_scopes)
320 /* We're processing a non-template declaration (even though it may
321 be a member of a template class.) For example:
323 template <class T> void S<T>::f(int);
325 The `class T' maches the `S<T>', leaving no template headers
326 corresponding to the `f'. */
328 else if (n_template_parm_scopes > n_class_scopes + 1)
329 /* We've got too many template headers. For example:
331 template <> template <class T> void f (T);
333 There need to be more enclosing classes. */
334 return tsk_excessive_parms;
336 /* This must be a template. It's of the form:
338 template <class T> template <class U> void S<T>::f(U);
340 This is a specialization if the innermost level was a
341 specialization; otherwise it's just a definition of the
343 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
346 /* Exit the current scope. */
354 /* When a label goes out of scope, check to see if that label was used
355 in a valid manner, and issue any appropriate warnings or errors. */
358 pop_label (tree label, tree old_value)
360 if (!processing_template_decl)
362 if (DECL_INITIAL (label) == NULL_TREE)
366 cp_error_at ("label `%D' used but not defined", label);
367 #ifdef USE_MAPPED_LOCATION
368 location = input_location; /* FIXME want (input_filename, (line)0) */
370 location.file = input_filename;
373 /* Avoid crashing later. */
374 define_label (location, DECL_NAME (label));
376 else if (warn_unused_label && !TREE_USED (label))
377 cp_warning_at ("label `%D' defined but not used", label);
380 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
383 /* At the end of a function, all labels declared within the function
384 go out of scope. BLOCK is the top-level block for the
388 pop_labels (tree block)
390 struct named_label_list *link;
392 /* Clear out the definitions of all label names, since their scopes
394 for (link = named_labels; link; link = link->next)
396 pop_label (link->label_decl, link->old_value);
397 /* Put the labels into the "variables" of the top-level block,
398 so debugger can see them. */
399 TREE_CHAIN (link->label_decl) = BLOCK_VARS (block);
400 BLOCK_VARS (block) = link->label_decl;
406 /* The following two routines are used to interface to Objective-C++.
407 The binding level is purposely treated as an opaque type. */
410 objc_get_current_scope (void)
412 return current_binding_level;
415 /* The following routine is used by the NeXT-style SJLJ exceptions;
416 variables get marked 'volatile' so as to not be clobbered by
417 _setjmp()/_longjmp() calls. All variables in the current scope,
418 as well as parent scopes up to (but not including) ENCLOSING_BLK
419 shall be thusly marked. */
422 objc_mark_locals_volatile (void *enclosing_blk)
424 struct cp_binding_level *scope;
426 for (scope = current_binding_level;
427 scope && scope != enclosing_blk && scope->kind == sk_block;
428 scope = scope->level_chain)
432 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
434 if (TREE_CODE (decl) == VAR_DECL)
436 DECL_REGISTER (decl) = 0;
437 TREE_THIS_VOLATILE (decl) = 1;
443 /* Exit a binding level.
444 Pop the level off, and restore the state of the identifier-decl mappings
445 that were in effect when this level was entered.
447 If KEEP == 1, this level had explicit declarations, so
448 and create a "block" (a BLOCK node) for the level
449 to record its declarations and subblocks for symbol table output.
451 If FUNCTIONBODY is nonzero, this level is the body of a function,
452 so create a block as if KEEP were set and also clear out all
455 If REVERSE is nonzero, reverse the order of decls before putting
456 them into the BLOCK. */
459 poplevel (int keep, int reverse, int functionbody)
462 /* The chain of decls was accumulated in reverse order.
463 Put it into forward order, just for cleanliness. */
465 int tmp = functionbody;
466 int real_functionbody;
470 int leaving_for_scope;
473 timevar_push (TV_NAME_LOOKUP);
478 gcc_assert (current_binding_level->kind != sk_class);
480 real_functionbody = (current_binding_level->kind == sk_cleanup
481 ? ((functionbody = 0), tmp) : functionbody);
482 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
484 gcc_assert (!VEC_length(cp_class_binding,
485 current_binding_level->class_shadowed));
487 /* We used to use KEEP == 2 to indicate that the new block should go
488 at the beginning of the list of blocks at this binding level,
489 rather than the end. This hack is no longer used. */
490 gcc_assert (keep == 0 || keep == 1);
492 if (current_binding_level->keep)
495 /* Any uses of undefined labels, and any defined labels, now operate
496 under constraints of next binding contour. */
497 if (cfun && !functionbody)
499 struct cp_binding_level *level_chain;
500 level_chain = current_binding_level->level_chain;
503 struct named_label_use_list *uses;
504 struct named_label_list *labels;
505 for (labels = named_labels; labels; labels = labels->next)
506 if (labels->binding_level == current_binding_level)
509 if (current_binding_level->kind == sk_try)
510 labels->in_try_scope = 1;
511 if (current_binding_level->kind == sk_catch)
512 labels->in_catch_scope = 1;
513 for (decl = labels->names_in_scope; decl;
514 decl = TREE_CHAIN (decl))
515 if (decl_jump_unsafe (decl))
516 labels->bad_decls = tree_cons (NULL_TREE, decl,
518 labels->binding_level = level_chain;
519 labels->names_in_scope = level_chain->names;
522 for (uses = named_label_uses; uses; uses = uses->next)
523 if (uses->binding_level == current_binding_level)
525 uses->binding_level = level_chain;
526 uses->names_in_scope = level_chain->names;
531 /* Get the decls in the order they were written.
532 Usually current_binding_level->names is in reverse order.
533 But parameter decls were previously put in forward order. */
536 current_binding_level->names
537 = decls = nreverse (current_binding_level->names);
539 decls = current_binding_level->names;
541 /* If there were any declarations or structure tags in that level,
542 or if this level is a function body,
543 create a BLOCK to record them for the life of this function. */
545 if (keep == 1 || functionbody)
546 block = make_node (BLOCK);
547 if (block != NULL_TREE)
549 BLOCK_VARS (block) = decls;
550 BLOCK_SUBBLOCKS (block) = subblocks;
553 /* In each subblock, record that this is its superior. */
555 for (link = subblocks; link; link = TREE_CHAIN (link))
556 BLOCK_SUPERCONTEXT (link) = block;
558 /* We still support the old for-scope rules, whereby the variables
559 in a for-init statement were in scope after the for-statement
560 ended. We only use the new rules if flag_new_for_scope is
563 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
565 /* Before we remove the declarations first check for unused variables. */
566 if (warn_unused_variable
567 && !processing_template_decl)
568 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
569 if (TREE_CODE (decl) == VAR_DECL
570 && ! TREE_USED (decl)
571 && ! DECL_IN_SYSTEM_HEADER (decl)
572 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
573 warning ("%Junused variable '%D'", decl, decl);
575 /* Remove declarations for all the DECLs in this level. */
576 for (link = decls; link; link = TREE_CHAIN (link))
578 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
581 tree name = DECL_NAME (link);
585 ob = outer_binding (name,
586 IDENTIFIER_BINDING (name),
589 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
591 ns_binding = NULL_TREE;
593 if (ob && ob->scope == current_binding_level->level_chain)
594 /* We have something like:
599 and we are leaving the `for' scope. There's no reason to
600 keep the binding of the inner `i' in this case. */
601 pop_binding (name, link);
602 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
603 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
604 /* Here, we have something like:
612 We must pop the for-scope binding so we know what's a
613 type and what isn't. */
614 pop_binding (name, link);
617 /* Mark this VAR_DECL as dead so that we can tell we left it
618 there only for backward compatibility. */
619 DECL_DEAD_FOR_LOCAL (link) = 1;
621 /* Keep track of what should have happened when we
622 popped the binding. */
624 DECL_SHADOWED_FOR_VAR (link) = ob->value;
626 /* Add it to the list of dead variables in the next
627 outermost binding to that we can remove these when we
628 leave that binding. */
629 current_binding_level->level_chain->dead_vars_from_for
630 = tree_cons (NULL_TREE, link,
631 current_binding_level->level_chain->
634 /* Although we don't pop the cxx_binding, we do clear
635 its SCOPE since the scope is going away now. */
636 IDENTIFIER_BINDING (name)->scope
637 = current_binding_level->level_chain;
644 /* Remove the binding. */
647 if (TREE_CODE (decl) == TREE_LIST)
648 decl = TREE_VALUE (decl);
651 if (TREE_CODE (name) == OVERLOAD)
652 name = OVL_FUNCTION (name);
654 gcc_assert (DECL_P (name));
655 pop_binding (DECL_NAME (name), decl);
659 /* Remove declarations for any `for' variables from inner scopes
660 that we kept around. */
661 for (link = current_binding_level->dead_vars_from_for;
662 link; link = TREE_CHAIN (link))
663 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
665 /* Restore the IDENTIFIER_TYPE_VALUEs. */
666 for (link = current_binding_level->type_shadowed;
667 link; link = TREE_CHAIN (link))
668 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
670 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
671 for (link = current_binding_level->shadowed_labels;
673 link = TREE_CHAIN (link))
674 pop_label (TREE_VALUE (link), TREE_PURPOSE (link));
676 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
677 list if a `using' declaration put them there. The debugging
678 back-ends won't understand OVERLOAD, so we remove them here.
679 Because the BLOCK_VARS are (temporarily) shared with
680 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
681 popped all the bindings. */
686 for (d = &BLOCK_VARS (block); *d; )
688 if (TREE_CODE (*d) == TREE_LIST)
689 *d = TREE_CHAIN (*d);
691 d = &TREE_CHAIN (*d);
695 /* If the level being exited is the top level of a function,
696 check over all the labels. */
699 /* Since this is the top level block of a function, the vars are
700 the function's parameters. Don't leave them in the BLOCK
701 because they are found in the FUNCTION_DECL instead. */
702 BLOCK_VARS (block) = 0;
706 kind = current_binding_level->kind;
707 if (kind == sk_cleanup)
711 /* If this is a temporary binding created for a cleanup, then we'll
712 have pushed a statement list level. Pop that, create a new
713 BIND_EXPR for the block, and insert it into the stream. */
714 stmt = pop_stmt_list (current_binding_level->statement_list);
715 stmt = c_build_bind_expr (block, stmt);
721 DECL_INITIAL (current_function_decl) = block;
723 current_binding_level->blocks
724 = chainon (current_binding_level->blocks, block);
726 /* If we did not make a block for the level just exited,
727 any blocks made for inner levels
728 (since they cannot be recorded as subblocks in that level)
729 must be carried forward so they will later become subblocks
730 of something else. */
732 current_binding_level->blocks
733 = chainon (current_binding_level->blocks, subblocks);
735 /* Each and every BLOCK node created here in `poplevel' is important
736 (e.g. for proper debugging information) so if we created one
737 earlier, mark it as "used". */
739 TREE_USED (block) = 1;
741 /* All temporary bindings created for cleanups are popped silently. */
742 if (kind == sk_cleanup)
745 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
748 /* Delete the node BLOCK from the current binding level.
749 This is used for the block inside a stmt expr ({...})
750 so that the block can be reinserted where appropriate. */
753 delete_block (tree block)
756 if (current_binding_level->blocks == block)
757 current_binding_level->blocks = TREE_CHAIN (block);
758 for (t = current_binding_level->blocks; t;)
760 if (TREE_CHAIN (t) == block)
761 TREE_CHAIN (t) = TREE_CHAIN (block);
765 TREE_CHAIN (block) = NULL_TREE;
766 /* Clear TREE_USED which is always set by poplevel.
767 The flag is set again if insert_block is called. */
768 TREE_USED (block) = 0;
771 /* Insert BLOCK at the end of the list of subblocks of the
772 current binding level. This is used when a BIND_EXPR is expanded,
773 to handle the BLOCK node inside the BIND_EXPR. */
776 insert_block (tree block)
778 TREE_USED (block) = 1;
779 current_binding_level->blocks
780 = chainon (current_binding_level->blocks, block);
783 /* Returns nonzero if T is a virtual function table. */
786 vtable_decl_p (tree t, void* data ATTRIBUTE_UNUSED )
788 return (TREE_CODE (t) == VAR_DECL && DECL_VIRTUAL_P (t));
791 /* Returns nonzero if T is a TYPE_DECL for a type with virtual
795 vtype_decl_p (tree t, void *data ATTRIBUTE_UNUSED )
797 return (TREE_CODE (t) == TYPE_DECL
798 && TREE_CODE (TREE_TYPE (t)) == RECORD_TYPE
799 && TYPE_POLYMORPHIC_P (TREE_TYPE (t)));
802 struct walk_globals_data {
808 /* Walk the vtable declarations in NAMESPACE. Whenever one is found
809 for which P returns nonzero, call F with its address. If any call
810 to F returns a nonzero value, return a nonzero value. */
813 walk_vtables_r (tree namespace, void* data)
815 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
816 walk_globals_fn f = wgd->f;
818 tree decl = NAMESPACE_LEVEL (namespace)->vtables;
821 for (; decl ; decl = TREE_CHAIN (decl))
822 result |= (*f) (&decl, d);
827 /* Walk the vtable declarations. Whenever one is found for which P
828 returns nonzero, call F with its address. If any call to F
829 returns a nonzero value, return a nonzero value. */
831 walk_vtables (walk_globals_pred p, walk_globals_fn f, void *data)
833 struct walk_globals_data wgd;
838 return walk_namespaces (walk_vtables_r, &wgd);
841 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
842 itself, calling F for each. The DATA is passed to F as well. */
845 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
848 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
850 result |= (*f) (namespace, data);
852 for (; current; current = TREE_CHAIN (current))
853 result |= walk_namespaces_r (current, f, data);
858 /* Walk all the namespaces, calling F for each. The DATA is passed to
862 walk_namespaces (walk_namespaces_fn f, void* data)
864 return walk_namespaces_r (global_namespace, f, data);
867 /* Walk the global declarations in NAMESPACE. Whenever one is found
868 for which P returns nonzero, call F with its address. If any call
869 to F returns a nonzero value, return a nonzero value. */
872 walk_globals_r (tree namespace, void* data)
874 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
875 walk_globals_pred p = wgd->p;
876 walk_globals_fn f = wgd->f;
881 t = &NAMESPACE_LEVEL (namespace)->names;
888 result |= (*f) (t, d);
890 /* If F changed *T, then *T still points at the next item to
893 t = &TREE_CHAIN (*t);
899 /* Walk the global declarations. Whenever one is found for which P
900 returns true, call F with its address. If any call to F
901 returns true, return true. */
904 walk_globals (walk_globals_pred p, walk_globals_fn f, void *data)
906 struct walk_globals_data wgd;
911 return walk_namespaces (walk_globals_r, &wgd);
914 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
915 DATA is non-NULL, this is the last time we will call
916 wrapup_global_declarations for this NAMESPACE. */
919 wrapup_globals_for_namespace (tree namespace, void* data)
921 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
922 varray_type statics = level->static_decls;
923 tree *vec = &VARRAY_TREE (statics, 0);
924 int len = VARRAY_ACTIVE_SIZE (statics);
925 int last_time = (data != 0);
929 check_global_declarations (vec, len);
933 /* Write out any globals that need to be output. */
934 return wrapup_global_declarations (vec, len);
938 /* In C++, you don't have to write `struct S' to refer to `S'; you
939 can just use `S'. We accomplish this by creating a TYPE_DECL as
940 if the user had written `typedef struct S S'. Create and return
941 the TYPE_DECL for TYPE. */
944 create_implicit_typedef (tree name, tree type)
948 decl = build_decl (TYPE_DECL, name, type);
949 DECL_ARTIFICIAL (decl) = 1;
950 /* There are other implicit type declarations, like the one *within*
951 a class that allows you to write `S::S'. We must distinguish
953 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
954 TYPE_NAME (type) = decl;
959 /* Remember a local name for name-mangling purposes. */
962 push_local_name (tree decl)
967 timevar_push (TV_NAME_LOOKUP);
969 VARRAY_TREE_INIT (local_names, 8, "local_names");
971 name = DECL_NAME (decl);
973 nelts = VARRAY_ACTIVE_SIZE (local_names);
974 for (i = 0; i < nelts; i++)
976 t = VARRAY_TREE (local_names, i);
977 if (DECL_NAME (t) == name)
979 if (!DECL_LANG_SPECIFIC (decl))
980 retrofit_lang_decl (decl);
981 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
982 if (DECL_LANG_SPECIFIC (t))
983 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
985 DECL_DISCRIMINATOR (decl) = 1;
987 VARRAY_TREE (local_names, i) = decl;
988 timevar_pop (TV_NAME_LOOKUP);
993 VARRAY_PUSH_TREE (local_names, decl);
994 timevar_pop (TV_NAME_LOOKUP);
997 /* Subroutine of duplicate_decls: return truthvalue of whether
998 or not types of these decls match.
1000 For C++, we must compare the parameter list so that `int' can match
1001 `int&' in a parameter position, but `int&' is not confused with
1005 decls_match (tree newdecl, tree olddecl)
1009 if (newdecl == olddecl)
1012 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
1013 /* If the two DECLs are not even the same kind of thing, we're not
1014 interested in their types. */
1017 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1019 tree f1 = TREE_TYPE (newdecl);
1020 tree f2 = TREE_TYPE (olddecl);
1021 tree p1 = TYPE_ARG_TYPES (f1);
1022 tree p2 = TYPE_ARG_TYPES (f2);
1024 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1025 && ! (DECL_EXTERN_C_P (newdecl)
1026 && DECL_EXTERN_C_P (olddecl)))
1029 if (TREE_CODE (f1) != TREE_CODE (f2))
1032 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
1034 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
1035 && (DECL_BUILT_IN (olddecl)
1036 #ifndef NO_IMPLICIT_EXTERN_C
1037 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
1038 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
1042 types_match = self_promoting_args_p (p1);
1043 if (p1 == void_list_node)
1044 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1046 #ifndef NO_IMPLICIT_EXTERN_C
1047 else if (p1 == NULL_TREE
1048 && (DECL_EXTERN_C_P (olddecl)
1049 && DECL_IN_SYSTEM_HEADER (olddecl)
1050 && !DECL_CLASS_SCOPE_P (olddecl))
1051 && (DECL_EXTERN_C_P (newdecl)
1052 && DECL_IN_SYSTEM_HEADER (newdecl)
1053 && !DECL_CLASS_SCOPE_P (newdecl)))
1055 types_match = self_promoting_args_p (p2);
1056 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1060 types_match = compparms (p1, p2);
1065 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1067 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1068 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1071 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1072 DECL_TEMPLATE_PARMS (olddecl)))
1075 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1076 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1077 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1079 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1080 DECL_TEMPLATE_RESULT (newdecl));
1084 if (TREE_TYPE (newdecl) == error_mark_node)
1085 types_match = TREE_TYPE (olddecl) == error_mark_node;
1086 else if (TREE_TYPE (olddecl) == NULL_TREE)
1087 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1088 else if (TREE_TYPE (newdecl) == NULL_TREE)
1091 types_match = comptypes (TREE_TYPE (newdecl),
1092 TREE_TYPE (olddecl),
1093 COMPARE_REDECLARATION);
1099 /* If NEWDECL is `static' and an `extern' was seen previously,
1100 warn about it. OLDDECL is the previous declaration.
1102 Note that this does not apply to the C++ case of declaring
1103 a variable `extern const' and then later `const'.
1105 Don't complain about built-in functions, since they are beyond
1106 the user's control. */
1109 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1113 if (TREE_CODE (newdecl) == TYPE_DECL
1114 || TREE_CODE (newdecl) == TEMPLATE_DECL
1115 || TREE_CODE (newdecl) == CONST_DECL
1116 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1119 /* Don't get confused by static member functions; that's a different
1121 if (TREE_CODE (newdecl) == FUNCTION_DECL
1122 && DECL_STATIC_FUNCTION_P (newdecl))
1125 /* If the old declaration was `static', or the new one isn't, then
1126 then everything is OK. */
1127 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1130 /* It's OK to declare a builtin function as `static'. */
1131 if (TREE_CODE (olddecl) == FUNCTION_DECL
1132 && DECL_ARTIFICIAL (olddecl))
1135 name = DECL_ASSEMBLER_NAME (newdecl);
1136 pedwarn ("`%D' was declared `extern' and later `static'", newdecl);
1137 cp_pedwarn_at ("previous declaration of `%D'", olddecl);
1140 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1141 If the redeclaration is invalid, a diagnostic is issued, and the
1142 error_mark_node is returned. Otherwise, OLDDECL is returned.
1144 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1148 duplicate_decls (tree newdecl, tree olddecl)
1150 unsigned olddecl_uid = DECL_UID (olddecl);
1151 int olddecl_friend = 0, types_match = 0;
1152 int new_defines_function = 0;
1154 if (newdecl == olddecl)
1157 types_match = decls_match (newdecl, olddecl);
1159 /* If either the type of the new decl or the type of the old decl is an
1160 error_mark_node, then that implies that we have already issued an
1161 error (earlier) for some bogus type specification, and in that case,
1162 it is rather pointless to harass the user with yet more error message
1163 about the same declaration, so just pretend the types match here. */
1164 if (TREE_TYPE (newdecl) == error_mark_node
1165 || TREE_TYPE (olddecl) == error_mark_node)
1168 if (DECL_P (olddecl)
1169 && TREE_CODE (newdecl) == FUNCTION_DECL
1170 && TREE_CODE (olddecl) == FUNCTION_DECL
1171 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1173 if (DECL_DECLARED_INLINE_P (newdecl)
1174 && DECL_UNINLINABLE (newdecl)
1175 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1176 /* Already warned elsewhere. */;
1177 else if (DECL_DECLARED_INLINE_P (olddecl)
1178 && DECL_UNINLINABLE (olddecl)
1179 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1180 /* Already warned. */;
1181 else if (DECL_DECLARED_INLINE_P (newdecl)
1182 && DECL_UNINLINABLE (olddecl)
1183 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1185 warning ("%Jfunction '%D' redeclared as inline", newdecl, newdecl);
1186 warning ("%Jprevious declaration of '%D' with attribute noinline",
1189 else if (DECL_DECLARED_INLINE_P (olddecl)
1190 && DECL_UNINLINABLE (newdecl)
1191 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1193 warning ("%Jfunction '%D' redeclared with attribute noinline",
1195 warning ("%Jprevious declaration of '%D' was inline",
1200 /* Check for redeclaration and other discrepancies. */
1201 if (TREE_CODE (olddecl) == FUNCTION_DECL
1202 && DECL_ARTIFICIAL (olddecl))
1204 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1206 /* Avoid warnings redeclaring anticipated built-ins. */
1207 if (DECL_ANTICIPATED (olddecl))
1210 /* If you declare a built-in or predefined function name as static,
1211 the old definition is overridden, but optionally warn this was a
1212 bad choice of name. */
1213 if (! TREE_PUBLIC (newdecl))
1216 warning ("shadowing %s function `%#D'",
1217 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1219 /* Discard the old built-in function. */
1222 /* If the built-in is not ansi, then programs can override
1223 it even globally without an error. */
1224 else if (! DECL_BUILT_IN (olddecl))
1225 warning ("library function `%#D' redeclared as non-function `%#D'",
1229 error ("declaration of `%#D'", newdecl);
1230 error ("conflicts with built-in declaration `%#D'",
1235 else if (!types_match)
1237 /* Avoid warnings redeclaring anticipated built-ins. */
1238 if (DECL_ANTICIPATED (olddecl))
1240 /* Deal with fileptr_type_node. FILE type is not known
1241 at the time we create the builtins. */
1244 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1245 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1247 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1250 else if (TREE_VALUE (t2) == fileptr_type_node)
1252 tree t = TREE_VALUE (t1);
1254 if (TREE_CODE (t) == POINTER_TYPE
1255 && TYPE_NAME (TREE_TYPE (t))
1256 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1257 == get_identifier ("FILE")
1258 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1260 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1262 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1263 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1264 types_match = decls_match (newdecl, olddecl);
1266 return duplicate_decls (newdecl, olddecl);
1267 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1270 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1273 else if ((DECL_EXTERN_C_P (newdecl)
1274 && DECL_EXTERN_C_P (olddecl))
1275 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1276 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1278 /* A near match; override the builtin. */
1280 if (TREE_PUBLIC (newdecl))
1282 warning ("new declaration `%#D'", newdecl);
1283 warning ("ambiguates built-in declaration `%#D'",
1286 else if (warn_shadow)
1287 warning ("shadowing %s function `%#D'",
1288 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1292 /* Discard the old built-in function. */
1295 /* Replace the old RTL to avoid problems with inlining. */
1296 COPY_DECL_RTL (newdecl, olddecl);
1298 /* Even if the types match, prefer the new declarations type
1299 for anticipated built-ins, for exception lists, etc... */
1300 else if (DECL_ANTICIPATED (olddecl))
1302 tree type = TREE_TYPE (newdecl);
1303 tree attribs = (*targetm.merge_type_attributes)
1304 (TREE_TYPE (olddecl), type);
1306 type = cp_build_type_attribute_variant (type, attribs);
1307 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1310 /* Whether or not the builtin can throw exceptions has no
1311 bearing on this declarator. */
1312 TREE_NOTHROW (olddecl) = 0;
1314 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1316 /* If a builtin function is redeclared as `static', merge
1317 the declarations, but make the original one static. */
1318 DECL_THIS_STATIC (olddecl) = 1;
1319 TREE_PUBLIC (olddecl) = 0;
1321 /* Make the old declaration consistent with the new one so
1322 that all remnants of the builtin-ness of this function
1323 will be banished. */
1324 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1325 COPY_DECL_RTL (newdecl, olddecl);
1328 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1330 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1331 && TREE_CODE (newdecl) != TYPE_DECL
1332 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1333 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1334 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1335 && TREE_CODE (olddecl) != TYPE_DECL
1336 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1337 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1340 /* We do nothing special here, because C++ does such nasty
1341 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1342 get shadowed, and know that if we need to find a TYPE_DECL
1343 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1344 slot of the identifier. */
1348 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1349 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1350 || (TREE_CODE (olddecl) == FUNCTION_DECL
1351 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1354 error ("`%#D' redeclared as different kind of symbol", newdecl);
1355 if (TREE_CODE (olddecl) == TREE_LIST)
1356 olddecl = TREE_VALUE (olddecl);
1357 cp_error_at ("previous declaration of `%#D'", olddecl);
1359 return error_mark_node;
1361 else if (!types_match)
1363 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1364 /* These are certainly not duplicate declarations; they're
1365 from different scopes. */
1368 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1370 /* The name of a class template may not be declared to refer to
1371 any other template, class, function, object, namespace, value,
1372 or type in the same scope. */
1373 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1374 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1376 error ("declaration of template `%#D'", newdecl);
1377 cp_error_at ("conflicts with previous declaration `%#D'",
1380 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1381 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1382 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1383 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1384 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1385 DECL_TEMPLATE_PARMS (olddecl))
1386 /* Template functions can be disambiguated by
1388 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1389 TREE_TYPE (TREE_TYPE (olddecl))))
1391 error ("new declaration `%#D'", newdecl);
1392 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
1396 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1398 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1400 error ("declaration of C function `%#D' conflicts with",
1402 cp_error_at ("previous declaration `%#D' here", olddecl);
1404 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1405 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1407 error ("new declaration `%#D'", newdecl);
1408 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
1415 error ("conflicting declaration '%#D'", newdecl);
1416 cp_error_at ("'%D' has a previous declaration as `%#D'",
1421 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1422 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1423 && (!DECL_TEMPLATE_INFO (newdecl)
1424 || (DECL_TI_TEMPLATE (newdecl)
1425 != DECL_TI_TEMPLATE (olddecl))))
1426 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1427 && (!DECL_TEMPLATE_INFO (olddecl)
1428 || (DECL_TI_TEMPLATE (olddecl)
1429 != DECL_TI_TEMPLATE (newdecl))))))
1430 /* It's OK to have a template specialization and a non-template
1431 with the same type, or to have specializations of two
1432 different templates with the same type. Note that if one is a
1433 specialization, and the other is an instantiation of the same
1434 template, that we do not exit at this point. That situation
1435 can occur if we instantiate a template class, and then
1436 specialize one of its methods. This situation is valid, but
1437 the declarations must be merged in the usual way. */
1439 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1440 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1441 && !DECL_USE_TEMPLATE (newdecl))
1442 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1443 && !DECL_USE_TEMPLATE (olddecl))))
1444 /* One of the declarations is a template instantiation, and the
1445 other is not a template at all. That's OK. */
1447 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1449 /* In [namespace.alias] we have:
1451 In a declarative region, a namespace-alias-definition can be
1452 used to redefine a namespace-alias declared in that declarative
1453 region to refer only to the namespace to which it already
1456 Therefore, if we encounter a second alias directive for the same
1457 alias, we can just ignore the second directive. */
1458 if (DECL_NAMESPACE_ALIAS (newdecl)
1459 && (DECL_NAMESPACE_ALIAS (newdecl)
1460 == DECL_NAMESPACE_ALIAS (olddecl)))
1462 /* [namespace.alias]
1464 A namespace-name or namespace-alias shall not be declared as
1465 the name of any other entity in the same declarative region.
1466 A namespace-name defined at global scope shall not be
1467 declared as the name of any other entity in any global scope
1469 error ("declaration of `namespace %D' conflicts with", newdecl);
1470 cp_error_at ("previous declaration of `namespace %D' here", olddecl);
1471 return error_mark_node;
1475 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1478 error (errmsg, newdecl);
1479 if (DECL_NAME (olddecl) != NULL_TREE)
1480 cp_error_at ((DECL_INITIAL (olddecl)
1481 && namespace_bindings_p ())
1482 ? "`%#D' previously defined here"
1483 : "`%#D' previously declared here", olddecl);
1484 return error_mark_node;
1486 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1487 && DECL_INITIAL (olddecl) != NULL_TREE
1488 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1489 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1491 /* Prototype decl follows defn w/o prototype. */
1492 cp_warning_at ("prototype for `%#D'", newdecl);
1493 warning ("%Jfollows non-prototype definition here", olddecl);
1495 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1496 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1498 /* extern "C" int foo ();
1499 int foo () { bar (); }
1501 if (current_lang_depth () == 0)
1502 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1505 cp_error_at ("previous declaration of `%#D' with %L linkage",
1506 olddecl, DECL_LANGUAGE (olddecl));
1507 error ("conflicts with new declaration with %L linkage",
1508 DECL_LANGUAGE (newdecl));
1512 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1514 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1516 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1517 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1520 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1521 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1523 for (; t1 && t1 != void_list_node;
1524 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1525 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1527 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1530 pedwarn ("default argument given for parameter %d of `%#D'",
1532 cp_pedwarn_at ("after previous specification in `%#D'",
1537 error ("default argument given for parameter %d of `%#D'",
1539 cp_error_at ("after previous specification in `%#D'",
1544 if (DECL_DECLARED_INLINE_P (newdecl)
1545 && ! DECL_DECLARED_INLINE_P (olddecl)
1546 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1548 warning ("`%#D' was used before it was declared inline", newdecl);
1549 warning ("%Jprevious non-inline declaration here", olddecl);
1554 /* Do not merge an implicit typedef with an explicit one. In:
1558 typedef class A A __attribute__ ((foo));
1560 the attribute should apply only to the typedef. */
1561 if (TREE_CODE (olddecl) == TYPE_DECL
1562 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1563 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1566 /* If new decl is `static' and an `extern' was seen previously,
1568 warn_extern_redeclared_static (newdecl, olddecl);
1570 /* We have committed to returning 1 at this point. */
1571 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1573 /* Now that functions must hold information normally held
1574 by field decls, there is extra work to do so that
1575 declaration information does not get destroyed during
1577 if (DECL_VINDEX (olddecl))
1578 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1579 if (DECL_CONTEXT (olddecl))
1580 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1581 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1582 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1583 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1584 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1585 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1586 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1587 SET_OVERLOADED_OPERATOR_CODE
1588 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1589 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1591 /* Optionally warn about more than one declaration for the same
1592 name, but don't warn about a function declaration followed by a
1594 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1595 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1596 /* Don't warn about extern decl followed by definition. */
1597 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1598 /* Don't warn about friends, let add_friend take care of it. */
1599 && ! (DECL_FRIEND_P (newdecl) || DECL_FRIEND_P (olddecl)))
1601 warning ("redundant redeclaration of `%D' in same scope", newdecl);
1602 cp_warning_at ("previous declaration of `%D'", olddecl);
1606 /* Deal with C++: must preserve virtual function table size. */
1607 if (TREE_CODE (olddecl) == TYPE_DECL)
1609 tree newtype = TREE_TYPE (newdecl);
1610 tree oldtype = TREE_TYPE (olddecl);
1612 if (newtype != error_mark_node && oldtype != error_mark_node
1613 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1614 CLASSTYPE_FRIEND_CLASSES (newtype)
1615 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1617 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1620 /* Copy all the DECL_... slots specified in the new decl
1621 except for any that we copy here from the old type. */
1622 DECL_ATTRIBUTES (newdecl)
1623 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1625 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1627 TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
1628 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1629 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1630 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1632 /* If the new declaration is a definition, update the file and
1633 line information on the declaration. */
1634 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)) == NULL_TREE
1635 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl)) != NULL_TREE)
1637 DECL_SOURCE_LOCATION (olddecl)
1638 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl))
1639 = DECL_SOURCE_LOCATION (newdecl);
1640 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1641 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl))
1642 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl));
1645 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1647 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl))
1648 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl));
1649 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl))
1650 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl));
1658 /* Automatically handles default parameters. */
1659 tree oldtype = TREE_TYPE (olddecl);
1662 /* Merge the data types specified in the two decls. */
1663 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1665 /* If merge_types produces a non-typedef type, just use the old type. */
1666 if (TREE_CODE (newdecl) == TYPE_DECL
1667 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1670 if (TREE_CODE (newdecl) == VAR_DECL)
1672 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1673 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1674 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1675 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1678 /* Do this after calling `merge_types' so that default
1679 parameters don't confuse us. */
1680 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1681 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
1682 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
1684 TREE_TYPE (newdecl) = build_exception_variant (newtype,
1685 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
1686 TREE_TYPE (olddecl) = build_exception_variant (newtype,
1687 TYPE_RAISES_EXCEPTIONS (oldtype));
1689 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
1690 && ! DECL_IS_BUILTIN (olddecl)
1692 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
1693 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
1695 error ("declaration of `%F' throws different exceptions",
1697 cp_error_at ("than previous declaration `%F'", olddecl);
1700 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1702 /* Lay the type out, unless already done. */
1703 if (! same_type_p (newtype, oldtype)
1704 && TREE_TYPE (newdecl) != error_mark_node
1705 && !(processing_template_decl && uses_template_parms (newdecl)))
1706 layout_type (TREE_TYPE (newdecl));
1708 if ((TREE_CODE (newdecl) == VAR_DECL
1709 || TREE_CODE (newdecl) == PARM_DECL
1710 || TREE_CODE (newdecl) == RESULT_DECL
1711 || TREE_CODE (newdecl) == FIELD_DECL
1712 || TREE_CODE (newdecl) == TYPE_DECL)
1713 && !(processing_template_decl && uses_template_parms (newdecl)))
1714 layout_decl (newdecl, 0);
1716 /* Merge the type qualifiers. */
1717 if (TREE_READONLY (newdecl))
1718 TREE_READONLY (olddecl) = 1;
1719 if (TREE_THIS_VOLATILE (newdecl))
1720 TREE_THIS_VOLATILE (olddecl) = 1;
1722 /* Merge the initialization information. */
1723 if (DECL_INITIAL (newdecl) == NULL_TREE
1724 && DECL_INITIAL (olddecl) != NULL_TREE)
1726 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1727 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1728 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1729 && DECL_LANG_SPECIFIC (newdecl)
1730 && DECL_LANG_SPECIFIC (olddecl))
1732 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1733 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1737 /* Merge the section attribute.
1738 We want to issue an error if the sections conflict but that must be
1739 done later in decl_attributes since we are called before attributes
1741 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1742 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1744 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1746 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1747 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1748 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1749 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1750 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1751 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1752 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1753 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1754 /* Keep the old RTL. */
1755 COPY_DECL_RTL (olddecl, newdecl);
1757 else if (TREE_CODE (newdecl) == VAR_DECL
1758 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1760 /* Keep the old RTL. We cannot keep the old RTL if the old
1761 declaration was for an incomplete object and the new
1762 declaration is not since many attributes of the RTL will
1764 COPY_DECL_RTL (olddecl, newdecl);
1767 /* If cannot merge, then use the new type and qualifiers,
1768 and don't preserve the old rtl. */
1771 /* Clean out any memory we had of the old declaration. */
1772 tree oldstatic = value_member (olddecl, static_aggregates);
1774 TREE_VALUE (oldstatic) = error_mark_node;
1776 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1777 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1778 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1779 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1782 /* Merge the storage class information. */
1783 merge_weak (newdecl, olddecl);
1785 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1786 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1787 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1788 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1789 if (! DECL_EXTERNAL (olddecl))
1790 DECL_EXTERNAL (newdecl) = 0;
1792 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1794 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1795 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1796 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1797 DECL_TEMPLATE_INSTANTIATED (newdecl)
1798 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1799 /* Don't really know how much of the language-specific
1800 values we should copy from old to new. */
1801 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1802 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1803 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1804 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1805 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1806 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1807 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1808 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1809 olddecl_friend = DECL_FRIEND_P (olddecl);
1811 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1812 if (TREE_CODE (newdecl) == FUNCTION_DECL
1813 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1815 DECL_BEFRIENDING_CLASSES (newdecl)
1816 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1817 DECL_BEFRIENDING_CLASSES (olddecl));
1818 /* DECL_THUNKS is only valid for virtual functions,
1819 otherwise it is a DECL_FRIEND_CONTEXT. */
1820 if (DECL_VIRTUAL_P (newdecl))
1821 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1825 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1827 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1828 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1830 /* If newdecl is not a specialization, then it is not a
1831 template-related function at all. And that means that we
1832 should have exited above, returning 0. */
1833 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1835 if (TREE_USED (olddecl))
1836 /* From [temp.expl.spec]:
1838 If a template, a member template or the member of a class
1839 template is explicitly specialized then that
1840 specialization shall be declared before the first use of
1841 that specialization that would cause an implicit
1842 instantiation to take place, in every translation unit in
1843 which such a use occurs. */
1844 error ("explicit specialization of %D after first use",
1847 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1849 /* [temp.expl.spec/14] We don't inline explicit specialization
1850 just because the primary template says so. */
1854 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1855 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1857 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1859 /* If either decl says `inline', this fn is inline, unless
1860 its definition was passed already. */
1861 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1862 DECL_INLINE (olddecl) = 1;
1863 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1865 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1866 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1869 /* Preserve abstractness on cloned [cd]tors. */
1870 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1874 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1875 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1876 COPY_DECL_RTL (newdecl, olddecl);
1878 if (! types_match || new_defines_function)
1880 /* These need to be copied so that the names are available.
1881 Note that if the types do match, we'll preserve inline
1882 info and other bits, but if not, we won't. */
1883 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1884 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1886 if (new_defines_function)
1887 /* If defining a function declared with other language
1888 linkage, use the previously declared language linkage. */
1889 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1890 else if (types_match)
1892 /* If redeclaring a builtin function, and not a definition,
1893 it stays built in. */
1894 if (DECL_BUILT_IN (olddecl))
1896 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1897 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1898 /* If we're keeping the built-in definition, keep the rtl,
1899 regardless of declaration matches. */
1900 COPY_DECL_RTL (olddecl, newdecl);
1903 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1904 /* Don't clear out the arguments if we're redefining a function. */
1905 if (DECL_ARGUMENTS (olddecl))
1906 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1909 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1910 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1912 /* Now preserve various other info from the definition. */
1913 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1914 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1915 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1916 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1918 /* Warn about conflicting visibility specifications. */
1919 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1920 && DECL_VISIBILITY_SPECIFIED (newdecl)
1921 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1923 warning ("%J'%D': visibility attribute ignored because it",
1925 warning ("%Jconflicts with previous declaration here", olddecl);
1927 /* Choose the declaration which specified visibility. */
1928 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1930 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1931 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1934 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1938 function_size = sizeof (struct tree_decl);
1940 memcpy ((char *) olddecl + sizeof (struct tree_common),
1941 (char *) newdecl + sizeof (struct tree_common),
1942 function_size - sizeof (struct tree_common));
1944 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
1945 /* If newdecl is a template instantiation, it is possible that
1946 the following sequence of events has occurred:
1948 o A friend function was declared in a class template. The
1949 class template was instantiated.
1951 o The instantiation of the friend declaration was
1952 recorded on the instantiation list, and is newdecl.
1954 o Later, however, instantiate_class_template called pushdecl
1955 on the newdecl to perform name injection. But, pushdecl in
1956 turn called duplicate_decls when it discovered that another
1957 declaration of a global function with the same name already
1960 o Here, in duplicate_decls, we decided to clobber newdecl.
1962 If we're going to do that, we'd better make sure that
1963 olddecl, and not newdecl, is on the list of
1964 instantiations so that if we try to do the instantiation
1965 again we won't get the clobbered declaration. */
1966 reregister_specialization (newdecl,
1967 DECL_TI_TEMPLATE (newdecl),
1972 memcpy ((char *) olddecl + sizeof (struct tree_common),
1973 (char *) newdecl + sizeof (struct tree_common),
1974 sizeof (struct tree_decl) - sizeof (struct tree_common)
1975 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
1978 DECL_UID (olddecl) = olddecl_uid;
1980 DECL_FRIEND_P (olddecl) = 1;
1982 /* NEWDECL contains the merged attribute lists.
1983 Update OLDDECL to be the same. */
1984 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
1986 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
1987 so that encode_section_info has a chance to look at the new decl
1988 flags and attributes. */
1989 if (DECL_RTL_SET_P (olddecl)
1990 && (TREE_CODE (olddecl) == FUNCTION_DECL
1991 || (TREE_CODE (olddecl) == VAR_DECL
1992 && TREE_STATIC (olddecl))))
1993 make_decl_rtl (olddecl);
1998 /* Return zero if the declaration NEWDECL is valid
1999 when the declaration OLDDECL (assumed to be for the same name)
2000 has already been seen.
2001 Otherwise return an error message format string with a %s
2002 where the identifier should go. */
2005 redeclaration_error_message (tree newdecl, tree olddecl)
2007 if (TREE_CODE (newdecl) == TYPE_DECL)
2009 /* Because C++ can put things into name space for free,
2010 constructs like "typedef struct foo { ... } foo"
2011 would look like an erroneous redeclaration. */
2012 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2015 return "redefinition of `%#D'";
2017 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2019 /* If this is a pure function, its olddecl will actually be
2020 the original initialization to `0' (which we force to call
2021 abort()). Don't complain about redefinition in this case. */
2022 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl))
2025 /* If both functions come from different namespaces, this is not
2026 a redeclaration - this is a conflict with a used function. */
2027 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2028 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
2029 return "`%D' conflicts with used function";
2031 /* We'll complain about linkage mismatches in
2032 warn_extern_redeclared_static. */
2034 /* Defining the same name twice is no good. */
2035 if (DECL_INITIAL (olddecl) != NULL_TREE
2036 && DECL_INITIAL (newdecl) != NULL_TREE)
2038 if (DECL_NAME (olddecl) == NULL_TREE)
2039 return "`%#D' not declared in class";
2041 return "redefinition of `%#D'";
2045 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2049 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2051 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2052 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2053 return "redefinition of `%#D'";
2057 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2058 || (DECL_TEMPLATE_RESULT (newdecl)
2059 == DECL_TEMPLATE_RESULT (olddecl)))
2062 nt = DECL_TEMPLATE_RESULT (newdecl);
2063 if (DECL_TEMPLATE_INFO (nt))
2064 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2065 ot = DECL_TEMPLATE_RESULT (olddecl);
2066 if (DECL_TEMPLATE_INFO (ot))
2067 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2068 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2069 return "redefinition of `%#D'";
2073 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2075 /* Objects declared at top level: */
2076 /* If at least one is a reference, it's ok. */
2077 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2079 /* Reject two definitions. */
2080 return "redefinition of `%#D'";
2084 /* Objects declared with block scope: */
2085 /* Reject two definitions, and reject a definition
2086 together with an external reference. */
2087 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2088 return "redeclaration of `%#D'";
2093 /* Create a new label, named ID. */
2096 make_label_decl (tree id, int local_p)
2100 decl = build_decl (LABEL_DECL, id, void_type_node);
2102 DECL_CONTEXT (decl) = current_function_decl;
2103 DECL_MODE (decl) = VOIDmode;
2104 C_DECLARED_LABEL_FLAG (decl) = local_p;
2106 /* Say where one reference is to the label, for the sake of the
2107 error if it is not defined. */
2108 DECL_SOURCE_LOCATION (decl) = input_location;
2110 /* Record the fact that this identifier is bound to this label. */
2111 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2116 /* Record this label on the list of used labels so that we can check
2117 at the end of the function to see whether or not the label was
2118 actually defined, and so we can check when the label is defined whether
2119 this use is valid. */
2122 use_label (tree decl)
2124 if (named_label_uses == NULL
2125 || named_label_uses->names_in_scope != current_binding_level->names
2126 || named_label_uses->label_decl != decl)
2128 struct named_label_use_list *new_ent;
2129 new_ent = GGC_NEW (struct named_label_use_list);
2130 new_ent->label_decl = decl;
2131 new_ent->names_in_scope = current_binding_level->names;
2132 new_ent->binding_level = current_binding_level;
2133 new_ent->o_goto_locus = input_location;
2134 new_ent->next = named_label_uses;
2135 named_label_uses = new_ent;
2139 /* Look for a label named ID in the current function. If one cannot
2140 be found, create one. (We keep track of used, but undefined,
2141 labels, and complain about them at the end of a function.) */
2144 lookup_label (tree id)
2147 struct named_label_list *ent;
2149 timevar_push (TV_NAME_LOOKUP);
2150 /* You can't use labels at global scope. */
2151 if (current_function_decl == NULL_TREE)
2153 error ("label `%E' referenced outside of any function", id);
2154 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2157 /* See if we've already got this label. */
2158 decl = IDENTIFIER_LABEL_VALUE (id);
2159 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2160 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2162 /* Record this label on the list of labels used in this function.
2163 We do this before calling make_label_decl so that we get the
2164 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2165 ent = GGC_CNEW (struct named_label_list);
2166 ent->old_value = IDENTIFIER_LABEL_VALUE (id);
2167 ent->next = named_labels;
2170 /* We need a new label. */
2171 decl = make_label_decl (id, /*local_p=*/0);
2173 /* Now fill in the information we didn't have before. */
2174 ent->label_decl = decl;
2176 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2179 /* Declare a local label named ID. */
2182 declare_local_label (tree id)
2186 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2187 this scope we can restore the old value of
2188 IDENTIFIER_TYPE_VALUE. */
2189 current_binding_level->shadowed_labels
2190 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2191 current_binding_level->shadowed_labels);
2192 /* Look for the label. */
2193 decl = make_label_decl (id, /*local_p=*/1);
2194 /* Now fill in the information we didn't have before. */
2195 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
2200 /* Returns nonzero if it is ill-formed to jump past the declaration of
2201 DECL. Returns 2 if it's also a real problem. */
2204 decl_jump_unsafe (tree decl)
2206 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))
2209 if (DECL_INITIAL (decl) == NULL_TREE
2210 && pod_type_p (TREE_TYPE (decl)))
2213 /* This is really only important if we're crossing an initialization.
2214 The POD stuff is just pedantry; why should it matter if the class
2215 contains a field of pointer to member type? */
2216 if (DECL_INITIAL (decl)
2217 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))))
2222 /* Check that a single previously seen jump to a newly defined label
2223 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2224 the jump context; NAMES are the names in scope in LEVEL at the jump
2225 context; FILE and LINE are the source position of the jump or 0. */
2228 check_previous_goto_1 (tree decl,
2229 struct cp_binding_level* level,
2230 tree names, const location_t *locus)
2234 struct cp_binding_level *b = current_binding_level;
2235 for (; b; b = b->level_chain)
2237 tree new_decls = b->names;
2238 tree old_decls = (b == level ? names : NULL_TREE);
2239 for (; new_decls != old_decls;
2240 new_decls = TREE_CHAIN (new_decls))
2242 int problem = decl_jump_unsafe (new_decls);
2249 pedwarn ("jump to label `%D'", decl);
2251 pedwarn ("jump to case label");
2254 pedwarn ("%H from here", locus);
2259 cp_error_at (" crosses initialization of `%#D'",
2262 cp_pedwarn_at (" enters scope of non-POD `%#D'",
2268 if ((b->kind == sk_try || b->kind == sk_catch) && ! saw_eh)
2273 pedwarn ("jump to label `%D'", decl);
2275 pedwarn ("jump to case label");
2278 pedwarn ("%H from here", locus);
2281 if (b->kind == sk_try)
2282 error (" enters try block");
2284 error (" enters catch block");
2291 check_previous_goto (struct named_label_use_list* use)
2293 check_previous_goto_1 (use->label_decl, use->binding_level,
2294 use->names_in_scope, &use->o_goto_locus);
2298 check_switch_goto (struct cp_binding_level* level)
2300 check_previous_goto_1 (NULL_TREE, level, level->names, NULL);
2303 /* Check that any previously seen jumps to a newly defined label DECL
2304 are OK. Called by define_label. */
2307 check_previous_gotos (tree decl)
2309 struct named_label_use_list **usep;
2311 if (! TREE_USED (decl))
2314 for (usep = &named_label_uses; *usep; )
2316 struct named_label_use_list *use = *usep;
2317 if (use->label_decl == decl)
2319 check_previous_goto (use);
2323 usep = &(use->next);
2327 /* Check that a new jump to a label DECL is OK. Called by
2328 finish_goto_stmt. */
2331 check_goto (tree decl)
2335 struct named_label_list *lab;
2337 /* We can't know where a computed goto is jumping. So we assume
2339 if (! DECL_P (decl))
2342 /* If the label hasn't been defined yet, defer checking. */
2343 if (! DECL_INITIAL (decl))
2349 for (lab = named_labels; lab; lab = lab->next)
2350 if (decl == lab->label_decl)
2353 /* If the label is not on named_labels it's a gcc local label, so
2354 it must be in an outer scope, so jumping to it is always OK. */
2358 if ((lab->in_try_scope || lab->in_catch_scope || lab->bad_decls)
2361 cp_pedwarn_at ("jump to label `%D'", decl);
2362 pedwarn (" from here");
2366 for (bad = lab->bad_decls; bad; bad = TREE_CHAIN (bad))
2368 tree b = TREE_VALUE (bad);
2369 int u = decl_jump_unsafe (b);
2371 if (u > 1 && DECL_ARTIFICIAL (b))
2372 /* Can't skip init of __exception_info. */
2373 error ("%J enters catch block", b);
2375 cp_error_at (" skips initialization of `%#D'", b);
2377 cp_pedwarn_at (" enters scope of non-POD `%#D'", b);
2380 if (lab->in_try_scope)
2381 error (" enters try block");
2382 else if (lab->in_catch_scope)
2383 error (" enters catch block");
2386 /* Define a label, specifying the location in the source file.
2387 Return the LABEL_DECL node for the label. */
2390 define_label (location_t location, tree name)
2392 tree decl = lookup_label (name);
2393 struct named_label_list *ent;
2394 struct cp_binding_level *p;
2396 timevar_push (TV_NAME_LOOKUP);
2397 for (ent = named_labels; ent; ent = ent->next)
2398 if (ent->label_decl == decl)
2401 /* After labels, make any new cleanups in the function go into their
2402 own new (temporary) binding contour. */
2403 for (p = current_binding_level;
2404 p->kind != sk_function_parms;
2406 p->more_cleanups_ok = 0;
2408 if (name == get_identifier ("wchar_t"))
2409 pedwarn ("label named wchar_t");
2411 if (DECL_INITIAL (decl) != NULL_TREE)
2412 error ("duplicate label `%D'", decl);
2415 /* Mark label as having been defined. */
2416 DECL_INITIAL (decl) = error_mark_node;
2417 /* Say where in the source. */
2418 DECL_SOURCE_LOCATION (decl) = location;
2421 ent->names_in_scope = current_binding_level->names;
2422 ent->binding_level = current_binding_level;
2424 check_previous_gotos (decl);
2427 timevar_pop (TV_NAME_LOOKUP);
2433 struct cp_binding_level *level;
2434 struct cp_switch *next;
2435 /* The SWITCH_STMT being built. */
2437 /* A splay-tree mapping the low element of a case range to the high
2438 element, or NULL_TREE if there is no high element. Used to
2439 determine whether or not a new case label duplicates an old case
2440 label. We need a tree, rather than simply a hash table, because
2441 of the GNU case range extension. */
2445 /* A stack of the currently active switch statements. The innermost
2446 switch statement is on the top of the stack. There is no need to
2447 mark the stack for garbage collection because it is only active
2448 during the processing of the body of a function, and we never
2449 collect at that point. */
2451 static struct cp_switch *switch_stack;
2453 /* Called right after a switch-statement condition is parsed.
2454 SWITCH_STMT is the switch statement being parsed. */
2457 push_switch (tree switch_stmt)
2459 struct cp_switch *p = xmalloc (sizeof (struct cp_switch));
2460 p->level = current_binding_level;
2461 p->next = switch_stack;
2462 p->switch_stmt = switch_stmt;
2463 p->cases = splay_tree_new (case_compare, NULL, NULL);
2470 struct cp_switch *cs = switch_stack;
2472 /* Emit warnings as needed. */
2473 c_do_switch_warnings (cs->cases, cs->switch_stmt);
2475 splay_tree_delete (cs->cases);
2476 switch_stack = switch_stack->next;
2480 /* Note that we've seen a definition of a case label, and complain if this
2481 is a bad place for one. */
2484 finish_case_label (tree low_value, tree high_value)
2487 struct cp_binding_level *p;
2489 if (processing_template_decl)
2493 /* For templates, just add the case label; we'll do semantic
2494 analysis at instantiation-time. */
2495 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2496 return add_stmt (build_case_label (low_value, high_value, label));
2499 /* Find the condition on which this switch statement depends. */
2500 cond = SWITCH_COND (switch_stack->switch_stmt);
2501 if (cond && TREE_CODE (cond) == TREE_LIST)
2502 cond = TREE_VALUE (cond);
2504 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2505 low_value, high_value);
2507 check_switch_goto (switch_stack->level);
2509 /* After labels, make any new cleanups in the function go into their
2510 own new (temporary) binding contour. */
2511 for (p = current_binding_level;
2512 p->kind != sk_function_parms;
2514 p->more_cleanups_ok = 0;
2519 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2522 typename_hash (const void* k)
2527 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2528 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2533 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2536 typename_compare (const void * k1, const void * k2)
2545 d1 = TYPE_NAME (t1);
2546 d2 = TYPE_NAME (t2);
2548 return (DECL_NAME (d1) == DECL_NAME (d2)
2549 && TYPE_CONTEXT (t1) == TYPE_CONTEXT (t2)
2550 && ((TREE_TYPE (t1) != NULL_TREE)
2551 == (TREE_TYPE (t2) != NULL_TREE))
2552 && same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))
2553 && TYPENAME_TYPE_FULLNAME (t1) == TYPENAME_TYPE_FULLNAME (t2));
2556 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2557 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
2558 is non-NULL, this type is being created by the implicit typename
2559 extension, and BASE_TYPE is a type named `t' in some base class of
2560 `T' which depends on template parameters.
2562 Returns the new TYPENAME_TYPE. */
2564 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2567 build_typename_type (tree context, tree name, tree fullname)
2573 if (typename_htab == NULL)
2575 typename_htab = htab_create_ggc (61, &typename_hash,
2576 &typename_compare, NULL);
2579 /* Build the TYPENAME_TYPE. */
2580 t = make_aggr_type (TYPENAME_TYPE);
2581 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2582 TYPENAME_TYPE_FULLNAME (t) = fullname;
2584 /* Build the corresponding TYPE_DECL. */
2585 d = build_decl (TYPE_DECL, name, t);
2586 TYPE_NAME (TREE_TYPE (d)) = d;
2587 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2588 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2589 DECL_ARTIFICIAL (d) = 1;
2591 /* See if we already have this type. */
2592 e = htab_find_slot (typename_htab, t, INSERT);
2601 /* Resolve `typename CONTEXT::NAME'. Returns an appropriate type,
2602 unless an error occurs, in which case error_mark_node is returned.
2603 If we locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is
2604 set, we return that, rather than the _TYPE it corresponds to, in
2605 other cases we look through the type decl. If TF_ERROR is set,
2606 complain about errors, otherwise be quiet. */
2609 make_typename_type (tree context, tree name, tsubst_flags_t complain)
2613 if (name == error_mark_node
2614 || context == NULL_TREE
2615 || context == error_mark_node)
2616 return error_mark_node;
2620 if (!(TYPE_LANG_SPECIFIC (name)
2621 && (CLASSTYPE_IS_TEMPLATE (name)
2622 || CLASSTYPE_USE_TEMPLATE (name))))
2623 name = TYPE_IDENTIFIER (name);
2625 /* Create a TEMPLATE_ID_EXPR for the type. */
2626 name = build_nt (TEMPLATE_ID_EXPR,
2627 CLASSTYPE_TI_TEMPLATE (name),
2628 CLASSTYPE_TI_ARGS (name));
2630 else if (TREE_CODE (name) == TYPE_DECL)
2631 name = DECL_NAME (name);
2635 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2637 name = TREE_OPERAND (name, 0);
2638 if (TREE_CODE (name) == TEMPLATE_DECL)
2639 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2641 if (TREE_CODE (name) == TEMPLATE_DECL)
2643 error ("`%D' used without template parameters", name);
2644 return error_mark_node;
2646 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2648 if (TREE_CODE (context) == NAMESPACE_DECL)
2650 /* We can get here from typename_sub0 in the explicit_template_type
2651 expansion. Just fail. */
2652 if (complain & tf_error)
2653 error ("no class template named `%#T' in `%#T'",
2655 return error_mark_node;
2658 if (!dependent_type_p (context)
2659 || currently_open_class (context))
2661 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2663 tree tmpl = NULL_TREE;
2664 if (IS_AGGR_TYPE (context))
2665 tmpl = lookup_field (context, name, 0, false);
2666 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2668 if (complain & tf_error)
2669 error ("no class template named `%#T' in `%#T'",
2671 return error_mark_node;
2674 if (complain & tf_error)
2675 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2677 return lookup_template_class (tmpl,
2678 TREE_OPERAND (fullname, 1),
2680 /*entering_scope=*/0,
2681 tf_error | tf_warning | tf_user);
2687 if (!IS_AGGR_TYPE (context))
2689 if (complain & tf_error)
2690 error ("no type named `%#T' in `%#T'", name, context);
2691 return error_mark_node;
2694 t = lookup_field (context, name, 0, true);
2697 if (TREE_CODE (t) != TYPE_DECL)
2699 if (complain & tf_error)
2700 error ("no type named `%#T' in `%#T'", name, context);
2701 return error_mark_node;
2704 if (complain & tf_error)
2705 perform_or_defer_access_check (TYPE_BINFO (context), t);
2707 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2715 /* If the CONTEXT is not a template type, then either the field is
2716 there now or its never going to be. */
2717 if (!dependent_type_p (context))
2719 if (complain & tf_error)
2720 error ("no type named `%#T' in `%#T'", name, context);
2721 return error_mark_node;
2724 return build_typename_type (context, name, fullname);
2727 /* Resolve `CONTEXT::template NAME'. Returns an appropriate type,
2728 unless an error occurs, in which case error_mark_node is returned.
2729 If we locate a TYPE_DECL, we return that, rather than the _TYPE it
2730 corresponds to. If COMPLAIN zero, don't complain about any errors
2734 make_unbound_class_template (tree context, tree name, tsubst_flags_t complain)
2740 name = TYPE_IDENTIFIER (name);
2741 else if (DECL_P (name))
2742 name = DECL_NAME (name);
2743 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2745 if (!dependent_type_p (context)
2746 || currently_open_class (context))
2748 tree tmpl = NULL_TREE;
2750 if (IS_AGGR_TYPE (context))
2751 tmpl = lookup_field (context, name, 0, false);
2753 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2755 if (complain & tf_error)
2756 error ("no class template named `%#T' in `%#T'", name, context);
2757 return error_mark_node;
2760 if (complain & tf_error)
2761 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2766 /* Build the UNBOUND_CLASS_TEMPLATE. */
2767 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2768 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2769 TREE_TYPE (t) = NULL_TREE;
2771 /* Build the corresponding TEMPLATE_DECL. */
2772 d = build_decl (TEMPLATE_DECL, name, t);
2773 TYPE_NAME (TREE_TYPE (d)) = d;
2774 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2775 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2776 DECL_ARTIFICIAL (d) = 1;
2783 /* Push the declarations of builtin types into the namespace.
2784 RID_INDEX is the index of the builtin type in the array
2785 RID_POINTERS. NAME is the name used when looking up the builtin
2786 type. TYPE is the _TYPE node for the builtin type. */
2789 record_builtin_type (enum rid rid_index,
2793 tree rname = NULL_TREE, tname = NULL_TREE;
2794 tree tdecl = NULL_TREE;
2796 if ((int) rid_index < (int) RID_MAX)
2797 rname = ridpointers[(int) rid_index];
2799 tname = get_identifier (name);
2801 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2802 eliminated. Built-in types should not be looked up name; their
2803 names are keywords that the parser can recognize. However, there
2804 is code in c-common.c that uses identifier_global_value to look
2805 up built-in types by name. */
2808 tdecl = build_decl (TYPE_DECL, tname, type);
2809 DECL_ARTIFICIAL (tdecl) = 1;
2810 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2816 tdecl = build_decl (TYPE_DECL, rname, type);
2817 DECL_ARTIFICIAL (tdecl) = 1;
2819 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2822 if (!TYPE_NAME (type))
2823 TYPE_NAME (type) = tdecl;
2826 debug_hooks->type_decl (tdecl, 0);
2829 /* Record one of the standard Java types.
2830 * Declare it as having the given NAME.
2831 * If SIZE > 0, it is the size of one of the integral types;
2832 * otherwise it is the negative of the size of one of the other types. */
2835 record_builtin_java_type (const char* name, int size)
2839 type = make_signed_type (size);
2840 else if (size > -32)
2841 { /* "__java_char" or ""__java_boolean". */
2842 type = make_unsigned_type (-size);
2843 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2846 { /* "__java_float" or ""__java_double". */
2847 type = make_node (REAL_TYPE);
2848 TYPE_PRECISION (type) = - size;
2851 record_builtin_type (RID_MAX, name, type);
2852 decl = TYPE_NAME (type);
2854 /* Suppress generate debug symbol entries for these types,
2855 since for normal C++ they are just clutter.
2856 However, push_lang_context undoes this if extern "Java" is seen. */
2857 DECL_IGNORED_P (decl) = 1;
2859 TYPE_FOR_JAVA (type) = 1;
2863 /* Push a type into the namespace so that the back-ends ignore it. */
2866 record_unknown_type (tree type, const char* name)
2868 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
2869 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2870 DECL_IGNORED_P (decl) = 1;
2871 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
2872 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
2873 TYPE_ALIGN (type) = 1;
2874 TYPE_USER_ALIGN (type) = 0;
2875 TYPE_MODE (type) = TYPE_MODE (void_type_node);
2878 /* An string for which we should create an IDENTIFIER_NODE at
2881 typedef struct predefined_identifier
2883 /* The name of the identifier. */
2884 const char *const name;
2885 /* The place where the IDENTIFIER_NODE should be stored. */
2887 /* Nonzero if this is the name of a constructor or destructor. */
2888 const int ctor_or_dtor_p;
2889 } predefined_identifier;
2891 /* Create all the predefined identifiers. */
2894 initialize_predefined_identifiers (void)
2896 const predefined_identifier *pid;
2898 /* A table of identifiers to create at startup. */
2899 static const predefined_identifier predefined_identifiers[] = {
2900 { "C++", &lang_name_cplusplus, 0 },
2901 { "C", &lang_name_c, 0 },
2902 { "Java", &lang_name_java, 0 },
2903 { CTOR_NAME, &ctor_identifier, 1 },
2904 { "__base_ctor", &base_ctor_identifier, 1 },
2905 { "__comp_ctor", &complete_ctor_identifier, 1 },
2906 { DTOR_NAME, &dtor_identifier, 1 },
2907 { "__comp_dtor", &complete_dtor_identifier, 1 },
2908 { "__base_dtor", &base_dtor_identifier, 1 },
2909 { "__deleting_dtor", &deleting_dtor_identifier, 1 },
2910 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
2911 { "nelts", &nelts_identifier, 0 },
2912 { THIS_NAME, &this_identifier, 0 },
2913 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
2914 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
2915 { "_vptr", &vptr_identifier, 0 },
2916 { "__vtt_parm", &vtt_parm_identifier, 0 },
2917 { "::", &global_scope_name, 0 },
2918 { "std", &std_identifier, 0 },
2922 for (pid = predefined_identifiers; pid->name; ++pid)
2924 *pid->node = get_identifier (pid->name);
2925 if (pid->ctor_or_dtor_p)
2926 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
2930 /* Create the predefined scalar types of C,
2931 and some nodes representing standard constants (0, 1, (void *)0).
2932 Initialize the global binding level.
2933 Make definitions for built-in primitive functions. */
2936 cxx_init_decl_processing (void)
2939 tree void_ftype_ptr;
2941 build_common_tree_nodes (flag_signed_char, false);
2943 /* Create all the identifiers we need. */
2944 initialize_predefined_identifiers ();
2946 /* Create the global variables. */
2947 push_to_top_level ();
2949 current_function_decl = NULL_TREE;
2950 current_binding_level = NULL;
2951 /* Enter the global namespace. */
2952 gcc_assert (global_namespace == NULL_TREE);
2953 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
2955 begin_scope (sk_namespace, global_namespace);
2957 current_lang_name = NULL_TREE;
2959 /* Adjust various flags based on command-line settings. */
2960 if (!flag_permissive)
2961 flag_pedantic_errors = 1;
2962 if (!flag_no_inline)
2964 flag_inline_trees = 1;
2967 if (flag_inline_functions)
2969 flag_inline_trees = 2;
2970 flag_inline_functions = 0;
2973 /* Force minimum function alignment if using the least significant
2974 bit of function pointers to store the virtual bit. */
2975 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
2976 && force_align_functions_log < 1)
2977 force_align_functions_log = 1;
2980 current_lang_name = lang_name_c;
2982 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
2983 TREE_TYPE (error_mark_list) = error_mark_node;
2985 /* Create the `std' namespace. */
2986 push_namespace (std_identifier);
2987 std_node = current_namespace;
2990 c_common_nodes_and_builtins ();
2992 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
2993 java_short_type_node = record_builtin_java_type ("__java_short", 16);
2994 java_int_type_node = record_builtin_java_type ("__java_int", 32);
2995 java_long_type_node = record_builtin_java_type ("__java_long", 64);
2996 java_float_type_node = record_builtin_java_type ("__java_float", -32);
2997 java_double_type_node = record_builtin_java_type ("__java_double", -64);
2998 java_char_type_node = record_builtin_java_type ("__java_char", -16);
2999 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3001 integer_two_node = build_int_cst (NULL_TREE, 2);
3002 integer_three_node = build_int_cst (NULL_TREE, 3);
3004 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3005 truthvalue_type_node = boolean_type_node;
3006 truthvalue_false_node = boolean_false_node;
3007 truthvalue_true_node = boolean_true_node;
3009 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3012 record_builtin_type (RID_MAX, NULL, string_type_node);
3015 delta_type_node = ptrdiff_type_node;
3016 vtable_index_type = ptrdiff_type_node;
3018 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3019 void_ftype = build_function_type (void_type_node, void_list_node);
3020 void_ftype_ptr = build_function_type (void_type_node,
3021 tree_cons (NULL_TREE,
3025 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3027 /* C++ extensions */
3029 unknown_type_node = make_node (UNKNOWN_TYPE);
3030 record_unknown_type (unknown_type_node, "unknown type");
3032 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3033 TREE_TYPE (unknown_type_node) = unknown_type_node;
3035 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3037 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3038 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3041 /* Make sure we get a unique function type, so we can give
3042 its pointer type a name. (This wins for gdb.) */
3043 tree vfunc_type = make_node (FUNCTION_TYPE);
3044 TREE_TYPE (vfunc_type) = integer_type_node;
3045 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3046 layout_type (vfunc_type);
3048 vtable_entry_type = build_pointer_type (vfunc_type);
3050 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3053 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3054 layout_type (vtbl_type_node);
3055 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3056 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3057 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3058 layout_type (vtbl_ptr_type_node);
3059 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3061 push_namespace (get_identifier ("__cxxabiv1"));
3062 abi_node = current_namespace;
3065 global_type_node = make_node (LANG_TYPE);
3066 record_unknown_type (global_type_node, "global type");
3069 current_lang_name = lang_name_cplusplus;
3073 tree bad_alloc_type_node;
3074 tree bad_alloc_decl;
3075 tree newtype, deltype;
3076 tree ptr_ftype_sizetype;
3078 push_namespace (std_identifier);
3079 bad_alloc_id = get_identifier ("bad_alloc");
3080 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3081 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3083 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3084 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3085 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3089 = build_function_type (ptr_type_node,
3090 tree_cons (NULL_TREE,
3093 newtype = build_exception_variant
3094 (ptr_ftype_sizetype, add_exception_specifier
3095 (NULL_TREE, bad_alloc_type_node, -1));
3096 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3097 push_cp_library_fn (NEW_EXPR, newtype);
3098 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3099 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3100 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3104 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3106 /* Perform other language dependent initializations. */
3107 init_class_processing ();
3108 init_rtti_processing ();
3110 if (flag_exceptions)
3111 init_exception_processing ();
3113 if (! supports_one_only ())
3116 make_fname_decl = cp_make_fname_decl;
3117 start_fname_decls ();
3119 /* Show we use EH for cleanups. */
3120 if (flag_exceptions)
3121 using_eh_for_cleanups ();
3124 /* Generate an initializer for a function naming variable from
3125 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3126 filled in with the type of the init. */
3129 cp_fname_init (const char* name, tree *type_p)
3131 tree domain = NULL_TREE;
3133 tree init = NULL_TREE;
3138 length = strlen (name);
3139 domain = build_index_type (size_int (length));
3140 init = build_string (length + 1, name);
3143 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3144 type = build_cplus_array_type (type, domain);
3149 TREE_TYPE (init) = type;
3151 init = error_mark_node;
3156 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3157 decl, NAME is the initialization string and TYPE_DEP indicates whether
3158 NAME depended on the type of the function. We make use of that to detect
3159 __PRETTY_FUNCTION__ inside a template fn. This is being done
3160 lazily at the point of first use, so we mustn't push the decl now. */
3163 cp_make_fname_decl (tree id, int type_dep)
3165 const char *const name = (type_dep && processing_template_decl
3166 ? NULL : fname_as_string (type_dep));
3168 tree init = cp_fname_init (name, &type);
3169 tree decl = build_decl (VAR_DECL, id, type);
3172 free ((char *) name);
3174 /* As we're using pushdecl_with_scope, we must set the context. */
3175 DECL_CONTEXT (decl) = current_function_decl;
3176 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3178 TREE_STATIC (decl) = 1;
3179 TREE_READONLY (decl) = 1;
3180 DECL_ARTIFICIAL (decl) = 1;
3181 DECL_INITIAL (decl) = init;
3183 TREE_USED (decl) = 1;
3185 if (current_function_decl)
3187 struct cp_binding_level *b = current_binding_level;
3188 while (b->level_chain->kind != sk_function_parms)
3190 pushdecl_with_scope (decl, b);
3191 cp_finish_decl (decl, init, NULL_TREE, LOOKUP_ONLYCONVERTING);
3194 pushdecl_top_level_and_finish (decl, init);
3199 /* Make a definition for a builtin function named NAME in the current
3200 namespace, whose data type is TYPE and whose context is CONTEXT.
3201 TYPE should be a function type with argument types.
3203 CLASS and CODE tell later passes how to compile calls to this function.
3204 See tree.h for possible values.
3206 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3207 the name to be called if we can't opencode the function.
3208 If ATTRS is nonzero, use that for the function's attribute
3212 builtin_function_1 (const char* name,
3215 enum built_in_function code,
3216 enum built_in_class class,
3217 const char* libname,
3220 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3221 DECL_BUILT_IN_CLASS (decl) = class;
3222 DECL_FUNCTION_CODE (decl) = code;
3223 DECL_CONTEXT (decl) = context;
3227 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3228 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3229 function in the namespace. */
3231 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3233 /* Warn if a function in the namespace for users
3234 is used without an occasion to consider it declared. */
3235 if (name[0] != '_' || name[1] != '_')
3236 DECL_ANTICIPATED (decl) = 1;
3238 /* Possibly apply some default attributes to this built-in function. */
3240 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3242 decl_attributes (&decl, NULL_TREE, 0);
3247 /* Entry point for the benefit of c_common_nodes_and_builtins.
3249 Make a definition for a builtin function named NAME and whose data type
3250 is TYPE. TYPE should be a function type with argument types. This
3251 function places the anticipated declaration in the global namespace
3252 and additionally in the std namespace if appropriate.
3254 CLASS and CODE tell later passes how to compile calls to this function.
3255 See tree.h for possible values.
3257 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3258 the name to be called if we can't opencode the function.
3260 If ATTRS is nonzero, use that for the function's attribute
3264 builtin_function (const char* name,
3267 enum built_in_class cl,
3268 const char* libname,
3271 /* All builtins that don't begin with an '_' should additionally
3272 go in the 'std' namespace. */
3275 push_namespace (std_identifier);
3276 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3280 return builtin_function_1 (name, type, NULL_TREE, code,
3281 cl, libname, attrs);
3284 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3285 function. Not called directly. */
3288 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3290 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3291 DECL_EXTERNAL (fn) = 1;
3292 TREE_PUBLIC (fn) = 1;
3293 DECL_ARTIFICIAL (fn) = 1;
3294 TREE_NOTHROW (fn) = 1;
3295 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3296 SET_DECL_LANGUAGE (fn, lang_c);
3297 /* Runtime library routines are, by definition, available in an
3298 external shared object. */
3299 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3300 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3304 /* Returns the _DECL for a library function with C linkage.
3305 We assume that such functions never throw; if this is incorrect,
3306 callers should unset TREE_NOTHROW. */
3309 build_library_fn (tree name, tree type)
3311 return build_library_fn_1 (name, ERROR_MARK, type);
3314 /* Returns the _DECL for a library function with C++ linkage. */
3317 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3319 tree fn = build_library_fn_1 (name, operator_code, type);
3320 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3321 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3322 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3326 /* Like build_library_fn, but takes a C string instead of an
3330 build_library_fn_ptr (const char* name, tree type)
3332 return build_library_fn (get_identifier (name), type);
3335 /* Like build_cp_library_fn, but takes a C string instead of an
3339 build_cp_library_fn_ptr (const char* name, tree type)
3341 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3344 /* Like build_library_fn, but also pushes the function so that we will
3345 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3348 push_library_fn (tree name, tree type)
3350 tree fn = build_library_fn (name, type);
3351 pushdecl_top_level (fn);
3355 /* Like build_cp_library_fn, but also pushes the function so that it
3356 will be found by normal lookup. */
3359 push_cp_library_fn (enum tree_code operator_code, tree type)
3361 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3368 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3372 push_void_library_fn (tree name, tree parmtypes)
3374 tree type = build_function_type (void_type_node, parmtypes);
3375 return push_library_fn (name, type);
3378 /* Like push_library_fn, but also note that this function throws
3379 and does not return. Used for __throw_foo and the like. */
3382 push_throw_library_fn (tree name, tree type)
3384 tree fn = push_library_fn (name, type);
3385 TREE_THIS_VOLATILE (fn) = 1;
3386 TREE_NOTHROW (fn) = 0;
3390 /* When we call finish_struct for an anonymous union, we create
3391 default copy constructors and such. But, an anonymous union
3392 shouldn't have such things; this function undoes the damage to the
3393 anonymous union type T.
3395 (The reason that we create the synthesized methods is that we don't
3396 distinguish `union { int i; }' from `typedef union { int i; } U'.
3397 The first is an anonymous union; the second is just an ordinary
3401 fixup_anonymous_aggr (tree t)
3405 /* Wipe out memory of synthesized methods. */
3406 TYPE_HAS_CONSTRUCTOR (t) = 0;
3407 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3408 TYPE_HAS_INIT_REF (t) = 0;
3409 TYPE_HAS_CONST_INIT_REF (t) = 0;
3410 TYPE_HAS_ASSIGN_REF (t) = 0;
3411 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3413 /* Splice the implicitly generated functions out of the TYPE_METHODS
3415 q = &TYPE_METHODS (t);
3418 if (DECL_ARTIFICIAL (*q))
3419 *q = TREE_CHAIN (*q);
3421 q = &TREE_CHAIN (*q);
3424 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3425 if (TYPE_METHODS (t))
3426 error ("%Jan anonymous union cannot have function members",
3427 TYPE_MAIN_DECL (t));
3429 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3430 assignment operators (because they cannot have these methods themselves).
3431 For anonymous unions this is already checked because they are not allowed
3432 in any union, otherwise we have to check it. */
3433 if (TREE_CODE (t) != UNION_TYPE)
3437 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3438 if (TREE_CODE (field) == FIELD_DECL)
3440 type = TREE_TYPE (field);
3441 if (CLASS_TYPE_P (type))
3443 if (TYPE_NEEDS_CONSTRUCTING (type))
3444 cp_error_at ("member %#D' with constructor not allowed in anonymous aggregate",
3446 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3447 cp_error_at ("member %#D' with destructor not allowed in anonymous aggregate",
3449 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3450 cp_error_at ("member %#D' with copy assignment operator not allowed in anonymous aggregate",
3457 /* Make sure that a declaration with no declarator is well-formed, i.e.
3458 just declares a tagged type or anonymous union.
3460 Returns the type declared; or NULL_TREE if none. */
3463 check_tag_decl (cp_decl_specifier_seq *declspecs)
3465 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3466 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3467 /* If a class, struct, or enum type is declared by the DECLSPECS
3468 (i.e, if a class-specifier, enum-specifier, or non-typename
3469 elaborated-type-specifier appears in the DECLSPECS),
3470 DECLARED_TYPE is set to the corresponding type. */
3471 tree declared_type = NULL_TREE;
3472 bool error_p = false;
3474 if (declspecs->multiple_types_p)
3475 error ("multiple types in one declaration");
3476 else if (declspecs->redefined_builtin_type)
3478 if (!in_system_header)
3479 pedwarn ("redeclaration of C++ built-in type %qT",
3480 declspecs->redefined_builtin_type);
3484 if (TYPE_P (declspecs->type)
3485 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3486 && IS_AGGR_TYPE (declspecs->type))
3487 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3488 declared_type = declspecs->type;
3489 else if (declspecs->type == error_mark_node)
3491 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3492 pedwarn ("declaration does not declare anything");
3493 /* Check for an anonymous union. */
3494 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3495 && TYPE_ANONYMOUS_P (declared_type))
3497 /* 7/3 In a simple-declaration, the optional init-declarator-list
3498 can be omitted only when declaring a class (clause 9) or
3499 enumeration (7.2), that is, when the decl-specifier-seq contains
3500 either a class-specifier, an elaborated-type-specifier with
3501 a class-key (9.1), or an enum-specifier. In these cases and
3502 whenever a class-specifier or enum-specifier is present in the
3503 decl-specifier-seq, the identifiers in these specifiers are among
3504 the names being declared by the declaration (as class-name,
3505 enum-names, or enumerators, depending on the syntax). In such
3506 cases, and except for the declaration of an unnamed bit-field (9.6),
3507 the decl-specifier-seq shall introduce one or more names into the
3508 program, or shall redeclare a name introduced by a previous
3509 declaration. [Example:
3510 enum { }; // ill-formed
3511 typedef class { }; // ill-formed
3515 error ("missing type-name in typedef-declaration");
3518 /* Anonymous unions are objects, so they can have specifiers. */;
3519 SET_ANON_AGGR_TYPE_P (declared_type);
3521 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3522 && !in_system_header)
3523 pedwarn ("ISO C++ prohibits anonymous structs");
3528 if (declspecs->specs[(int)ds_inline]
3529 || declspecs->specs[(int)ds_virtual])
3530 error ("`%s' can only be specified for functions",
3531 declspecs->specs[(int)ds_inline]
3532 ? "inline" : "virtual");
3534 && (!current_class_type
3535 || current_scope () != current_class_type))
3536 error ("`friend' can only be specified inside a class");
3537 else if (declspecs->specs[(int)ds_explicit])
3538 error ("`explicit' can only be specified for constructors");
3539 else if (declspecs->storage_class)
3540 error ("a storage class can only be specified for objects "
3542 else if (declspecs->specs[(int)ds_const]
3543 || declspecs->specs[(int)ds_volatile]
3544 || declspecs->specs[(int)ds_restrict]
3545 || declspecs->specs[(int)ds_thread])
3546 error ("qualifiers can only be specified for objects "
3550 return declared_type;
3553 /* Called when a declaration is seen that contains no names to declare.
3554 If its type is a reference to a structure, union or enum inherited
3555 from a containing scope, shadow that tag name for the current scope
3556 with a forward reference.
3557 If its type defines a new named structure or union
3558 or defines an enum, it is valid but we need not do anything here.
3559 Otherwise, it is an error.
3561 C++: may have to grok the declspecs to learn about static,
3562 complain for anonymous unions.
3564 Returns the TYPE declared -- or NULL_TREE if none. */
3567 shadow_tag (cp_decl_specifier_seq *declspecs)
3569 tree t = check_tag_decl (declspecs);
3574 maybe_process_partial_specialization (t);
3576 /* This is where the variables in an anonymous union are
3577 declared. An anonymous union declaration looks like:
3579 because there is no declarator after the union, the parser
3580 sends that declaration here. */
3581 if (ANON_AGGR_TYPE_P (t))
3583 fixup_anonymous_aggr (t);
3585 if (TYPE_FIELDS (t))
3587 tree decl = grokdeclarator (/*declarator=*/NULL,
3588 declspecs, NORMAL, 0, NULL);
3589 finish_anon_union (decl);
3596 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3599 groktypename (cp_decl_specifier_seq *type_specifiers,
3600 const cp_declarator *declarator)
3604 attrs = type_specifiers->attributes;
3605 type_specifiers->attributes = NULL_TREE;
3606 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3608 cplus_decl_attributes (&type, attrs, 0);
3612 /* Decode a declarator in an ordinary declaration or data definition.
3613 This is called as soon as the type information and variable name
3614 have been parsed, before parsing the initializer if any.
3615 Here we create the ..._DECL node, fill in its type,
3616 and put it on the list of decls for the current context.
3617 The ..._DECL node is returned as the value.
3619 Exception: for arrays where the length is not specified,
3620 the type is left null, to be filled in by `cp_finish_decl'.
3622 Function definitions do not come here; they go to start_function
3623 instead. However, external and forward declarations of functions
3624 do go through here. Structure field declarations are done by
3625 grokfield and not through here. */
3628 start_decl (const cp_declarator *declarator,
3629 cp_decl_specifier_seq *declspecs,
3632 tree prefix_attributes,
3639 /* This should only be done once on the top most decl. */
3640 if (have_extern_spec)
3642 declspecs->storage_class = sc_extern;
3643 have_extern_spec = false;
3646 /* An object declared as __attribute__((deprecated)) suppresses
3647 warnings of uses of other deprecated items. */
3648 if (lookup_attribute ("deprecated", attributes))
3649 deprecated_state = DEPRECATED_SUPPRESS;
3651 attributes = chainon (attributes, prefix_attributes);
3653 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3656 deprecated_state = DEPRECATED_NORMAL;
3658 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
3661 type = TREE_TYPE (decl);
3663 if (type == error_mark_node)
3666 context = DECL_CONTEXT (decl);
3669 *pop_scope_p = push_scope (context);
3671 *pop_scope_p = false;
3673 /* We are only interested in class contexts, later. */
3674 if (context && TREE_CODE (context) == NAMESPACE_DECL)
3675 context = NULL_TREE;
3678 /* Is it valid for this decl to have an initializer at all?
3679 If not, set INITIALIZED to zero, which will indirectly
3680 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3681 switch (TREE_CODE (decl))
3684 error ("typedef `%D' is initialized (use __typeof__ instead)", decl);
3689 error ("function `%#D' is initialized like a variable", decl);
3699 if (! toplevel_bindings_p ()
3700 && DECL_EXTERNAL (decl))
3701 warning ("declaration of `%#D' has `extern' and is initialized",
3703 DECL_EXTERNAL (decl) = 0;
3704 if (toplevel_bindings_p ())
3705 TREE_STATIC (decl) = 1;
3707 /* Tell `pushdecl' this is an initialized decl
3708 even though we don't yet have the initializer expression.
3709 Also tell `cp_finish_decl' it may store the real initializer. */
3710 DECL_INITIAL (decl) = error_mark_node;
3713 /* Set attributes here so if duplicate decl, will have proper attributes. */
3714 cplus_decl_attributes (&decl, attributes, 0);
3716 /* If #pragma weak was used, mark the decl weak now. */
3717 if (global_scope_p (current_binding_level))
3718 maybe_apply_pragma_weak (decl);
3720 if (TREE_CODE (decl) == FUNCTION_DECL
3721 && DECL_DECLARED_INLINE_P (decl)
3722 && DECL_UNINLINABLE (decl)
3723 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3724 warning ("%Jinline function '%D' given attribute noinline", decl, decl);
3726 if (context && COMPLETE_TYPE_P (complete_type (context)))
3728 if (TREE_CODE (decl) == VAR_DECL)
3730 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3731 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3732 error ("`%#D' is not a static member of `%#T'", decl, context);
3735 if (DECL_CONTEXT (field) != context)
3737 if (!same_type_p (DECL_CONTEXT (field), context))
3738 pedwarn ("ISO C++ does not permit `%T::%D' to be defined as `%T::%D'",
3739 DECL_CONTEXT (field), DECL_NAME (decl),
3740 context, DECL_NAME (decl));
3741 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3743 /* Static data member are tricky; an in-class initialization
3744 still doesn't provide a definition, so the in-class
3745 declaration will have DECL_EXTERNAL set, but will have an
3746 initialization. Thus, duplicate_decls won't warn
3747 about this situation, and so we check here. */
3748 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
3749 error ("duplicate initialization of %D", decl);
3750 if (duplicate_decls (decl, field))
3756 tree field = check_classfn (context, decl,
3757 (processing_template_decl
3758 > template_class_depth (context))
3759 ? current_template_parms
3761 if (field && duplicate_decls (decl, field))
3765 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3766 DECL_IN_AGGR_P (decl) = 0;
3767 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3768 || CLASSTYPE_TEMPLATE_INSTANTIATION (context))
3770 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3771 /* [temp.expl.spec] An explicit specialization of a static data
3772 member of a template is a definition if the declaration
3773 includes an initializer; otherwise, it is a declaration.
3775 We check for processing_specialization so this only applies
3776 to the new specialization syntax. */
3777 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
3778 DECL_EXTERNAL (decl) = 1;
3781 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3782 pedwarn ("declaration of `%#D' outside of class is not definition",
3786 /* Enter this declaration into the symbol table. */
3787 tem = maybe_push_decl (decl);
3789 if (processing_template_decl)
3790 tem = push_template_decl (tem);
3791 if (tem == error_mark_node)
3792 return error_mark_node;
3794 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3795 /* Tell the back-end to use or not use .common as appropriate. If we say
3796 -fconserve-space, we want this to save .data space, at the expense of
3797 wrong semantics. If we say -fno-conserve-space, we want this to
3798 produce errors about redefs; to do this we force variables into the
3800 DECL_COMMON (tem) = ((TREE_CODE (tem) != VAR_DECL
3801 || !DECL_THREAD_LOCAL (tem))
3802 && (flag_conserve_space || ! TREE_PUBLIC (tem)));
3805 if (! processing_template_decl)
3812 start_decl_1 (tree decl)
3814 tree type = TREE_TYPE (decl);
3815 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
3817 if (type == error_mark_node)
3821 /* Is it valid for this decl to have an initializer at all?
3822 If not, set INITIALIZED to zero, which will indirectly
3823 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3825 /* Don't allow initializations for incomplete types except for
3826 arrays which might be completed by the initialization. */
3827 if (COMPLETE_TYPE_P (complete_type (type)))
3828 ; /* A complete type is ok. */
3829 else if (TREE_CODE (type) != ARRAY_TYPE)
3831 error ("variable `%#D' has initializer but incomplete type",
3834 type = TREE_TYPE (decl) = error_mark_node;
3836 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3838 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3839 error ("elements of array `%#D' have incomplete type", decl);
3840 /* else we already gave an error in start_decl. */
3846 && TREE_CODE (decl) != TYPE_DECL
3847 && TREE_CODE (decl) != TEMPLATE_DECL
3848 && type != error_mark_node
3849 && IS_AGGR_TYPE (type)
3850 && ! DECL_EXTERNAL (decl))
3852 if ((! processing_template_decl || ! uses_template_parms (type))
3853 && !COMPLETE_TYPE_P (complete_type (type)))
3855 error ("aggregate `%#D' has incomplete type and cannot be defined",
3857 /* Change the type so that assemble_variable will give
3858 DECL an rtl we can live with: (mem (const_int 0)). */
3859 type = TREE_TYPE (decl) = error_mark_node;
3863 /* If any base type in the hierarchy of TYPE needs a constructor,
3864 then we set initialized to 1. This way any nodes which are
3865 created for the purposes of initializing this aggregate
3866 will live as long as it does. This is necessary for global
3867 aggregates which do not have their initializers processed until
3868 the end of the file. */
3869 initialized = TYPE_NEEDS_CONSTRUCTING (type);
3874 DECL_INITIAL (decl) = NULL_TREE;
3876 /* Create a new scope to hold this declaration if necessary.
3877 Whether or not a new scope is necessary cannot be determined
3878 until after the type has been completed; if the type is a
3879 specialization of a class template it is not until after
3880 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3881 will be set correctly. */
3882 maybe_push_cleanup_level (type);
3885 /* Handle initialization of references. DECL, TYPE, and INIT have the
3886 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3887 but will be set to a new CLEANUP_STMT if a temporary is created
3888 that must be destroyed subsequently.
3890 Returns an initializer expression to use to initialize DECL, or
3891 NULL if the initialization can be performed statically.
3893 Quotes on semantics can be found in ARM 8.4.3. */
3896 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
3900 if (init == NULL_TREE)
3902 if ((DECL_LANG_SPECIFIC (decl) == 0
3903 || DECL_IN_AGGR_P (decl) == 0)
3904 && ! DECL_THIS_EXTERN (decl))
3905 error ("`%D' declared as reference but not initialized", decl);
3909 if (TREE_CODE (init) == CONSTRUCTOR)
3911 error ("ISO C++ forbids use of initializer list to initialize reference `%D'", decl);
3915 if (TREE_CODE (init) == TREE_LIST)
3916 init = build_x_compound_expr_from_list (init, "initializer");
3918 if (TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE)
3919 init = convert_from_reference (init);
3921 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
3922 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
3923 /* Note: default conversion is only called in very special cases. */
3924 init = decay_conversion (init);
3926 /* Convert INIT to the reference type TYPE. This may involve the
3927 creation of a temporary, whose lifetime must be the same as that
3928 of the reference. If so, a DECL_EXPR for the temporary will be
3929 added just after the DECL_EXPR for DECL. That's why we don't set
3930 DECL_INITIAL for local references (instead assigning to them
3931 explicitly); we need to allow the temporary to be initialized
3933 tmp = initialize_reference (type, init, decl, cleanup);
3935 if (tmp == error_mark_node)
3937 else if (tmp == NULL_TREE)
3939 error ("cannot initialize `%T' from `%T'", type, TREE_TYPE (init));
3943 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
3946 DECL_INITIAL (decl) = tmp;
3951 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3952 array until we finish parsing the initializer. If that's the
3953 situation we're in, update DECL accordingly. */
3956 maybe_deduce_size_from_array_init (tree decl, tree init)
3958 tree type = TREE_TYPE (decl);
3960 if (TREE_CODE (type) == ARRAY_TYPE
3961 && TYPE_DOMAIN (type) == NULL_TREE
3962 && TREE_CODE (decl) != TYPE_DECL)
3964 /* do_default is really a C-ism to deal with tentative definitions.
3965 But let's leave it here to ease the eventual merge. */
3966 int do_default = !DECL_EXTERNAL (decl);
3967 tree initializer = init ? init : DECL_INITIAL (decl);
3968 int failure = complete_array_type (type, initializer, do_default);
3971 error ("initializer fails to determine size of `%D'", decl);
3976 error ("array size missing in `%D'", decl);
3977 /* If a `static' var's size isn't known, make it extern as
3978 well as static, so it does not get allocated. If it's not
3979 `static', then don't mark it extern; finish_incomplete_decl
3980 will give it a default size and it will get allocated. */
3981 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
3982 DECL_EXTERNAL (decl) = 1;
3985 if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
3986 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
3988 error ("zero-size array `%D'", decl);
3990 layout_decl (decl, 0);
3994 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
3995 any appropriate error messages regarding the layout. */
3998 layout_var_decl (tree decl)
4000 tree type = TREE_TYPE (decl);
4002 tree ttype = target_type (type);
4005 /* If we haven't already layed out this declaration, do so now.
4006 Note that we must not call complete type for an external object
4007 because it's type might involve templates that we are not
4008 supposed to instantiate yet. (And it's perfectly valid to say
4009 `extern X x' for some incomplete type `X'.) */
4010 if (!DECL_EXTERNAL (decl))
4011 complete_type (type);
4012 if (!DECL_SIZE (decl)
4013 && TREE_TYPE (decl) != error_mark_node
4014 && (COMPLETE_TYPE_P (type)
4015 || (TREE_CODE (type) == ARRAY_TYPE
4016 && !TYPE_DOMAIN (type)
4017 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4018 layout_decl (decl, 0);
4020 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4022 /* An automatic variable with an incomplete type: that is an error.
4023 Don't talk about array types here, since we took care of that
4024 message in grokdeclarator. */
4025 error ("storage size of `%D' isn't known", decl);
4026 TREE_TYPE (decl) = error_mark_node;
4029 /* Keep this code around in case we later want to control debug info
4030 based on whether a type is "used". (jason 1999-11-11) */
4032 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4033 /* Let debugger know it should output info for this type. */
4034 note_debug_info_needed (ttype);
4036 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4037 note_debug_info_needed (DECL_CONTEXT (decl));
4040 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4041 && DECL_SIZE (decl) != NULL_TREE
4042 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4044 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4045 constant_expression_warning (DECL_SIZE (decl));
4047 error ("storage size of `%D' isn't constant", decl);
4050 if (TREE_STATIC (decl)
4051 && !DECL_ARTIFICIAL (decl)
4052 && current_function_decl
4053 && DECL_CONTEXT (decl) == current_function_decl)
4054 push_local_name (decl);
4057 /* If a local static variable is declared in an inline function, or if
4058 we have a weak definition, we must endeavor to create only one
4059 instance of the variable at link-time. */
4062 maybe_commonize_var (tree decl)
4064 /* Static data in a function with comdat linkage also has comdat
4066 if (TREE_STATIC (decl)
4067 /* Don't mess with __FUNCTION__. */
4068 && ! DECL_ARTIFICIAL (decl)
4069 && DECL_FUNCTION_SCOPE_P (decl)
4070 /* Unfortunately, import_export_decl has not always been called
4071 before the function is processed, so we cannot simply check
4073 && (DECL_COMDAT (DECL_CONTEXT (decl))
4074 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4075 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4076 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4080 /* With weak symbols, we simply make the variable COMDAT;
4081 that will cause copies in multiple translations units to
4083 comdat_linkage (decl);
4087 if (DECL_INITIAL (decl) == NULL_TREE
4088 || DECL_INITIAL (decl) == error_mark_node)
4090 /* Without weak symbols, we can use COMMON to merge
4091 uninitialized variables. */
4092 TREE_PUBLIC (decl) = 1;
4093 DECL_COMMON (decl) = 1;
4097 /* While for initialized variables, we must use internal
4098 linkage -- which means that multiple copies will not
4100 TREE_PUBLIC (decl) = 0;
4101 DECL_COMMON (decl) = 0;
4102 cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl);
4103 warning ("%J you can work around this by removing the initializer",
4108 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4109 /* Set it up again; we might have set DECL_INITIAL since the last
4111 comdat_linkage (decl);
4114 /* Issue an error message if DECL is an uninitialized const variable. */
4117 check_for_uninitialized_const_var (tree decl)
4119 tree type = TREE_TYPE (decl);
4121 /* ``Unless explicitly declared extern, a const object does not have
4122 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4124 if (TREE_CODE (decl) == VAR_DECL
4125 && TREE_CODE (type) != REFERENCE_TYPE
4126 && CP_TYPE_CONST_P (type)
4127 && !TYPE_NEEDS_CONSTRUCTING (type)
4128 && !DECL_INITIAL (decl))
4129 error ("uninitialized const `%D'", decl);
4132 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4133 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4134 initialized. If there are no more such fields, the return value
4138 next_initializable_field (tree field)
4141 && (TREE_CODE (field) != FIELD_DECL
4142 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4143 || DECL_ARTIFICIAL (field)))
4144 field = TREE_CHAIN (field);
4149 /* Subroutine of reshape_init. Reshape the constructor for an array. INITP
4150 is the pointer to the old constructor list (to the CONSTRUCTOR_ELTS of
4151 the CONSTRUCTOR we are processing), while NEW_INIT is the CONSTRUCTOR we
4153 ELT_TYPE is the element type of the array. MAX_INDEX is an INTEGER_CST
4154 representing the size of the array minus one (the maximum index), or
4155 NULL_TREE if the array was declared without specifying the size. */
4158 reshape_init_array (tree elt_type, tree max_index,
4159 tree *initp, tree new_init)
4161 bool sized_array_p = (max_index != NULL_TREE);
4162 HOST_WIDE_INT max_index_cst = 0;
4163 HOST_WIDE_INT index;
4166 /* HWI is either 32bit or 64bit, so it must be enough to represent the
4168 max_index_cst = tree_low_cst (max_index, 1);
4170 /* Loop until there are no more initializers. */
4172 *initp && (!sized_array_p || index <= max_index_cst);
4176 tree designated_index;
4178 element_init = reshape_init (elt_type, initp);
4179 if (element_init == error_mark_node)
4181 TREE_CHAIN (element_init) = CONSTRUCTOR_ELTS (new_init);
4182 CONSTRUCTOR_ELTS (new_init) = element_init;
4183 designated_index = TREE_PURPOSE (element_init);
4184 if (designated_index)
4186 /* Handle array designated initializers (GNU extension). */
4187 if (TREE_CODE (designated_index) == IDENTIFIER_NODE)
4189 error ("name `%D' used in a GNU-style designated "
4190 "initializer for an array", designated_index);
4191 TREE_PURPOSE (element_init) = NULL_TREE;
4195 gcc_assert (TREE_CODE (designated_index) == INTEGER_CST);
4197 && tree_int_cst_lt (max_index, designated_index))
4199 error ("Designated initializer `%E' larger than array "
4200 "size", designated_index);
4201 TREE_PURPOSE (element_init) = NULL_TREE;
4204 index = tree_low_cst (designated_index, 1);
4212 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4213 brace-enclosed aggregate initializer.
4215 *INITP is one of a list of initializers describing a brace-enclosed
4216 initializer for an entity of the indicated aggregate TYPE. It may
4217 not presently match the shape of the TYPE; for example:
4219 struct S { int a; int b; };
4220 struct S a[] = { 1, 2, 3, 4 };
4222 Here *INITP will point to TREE_LIST of four elements, rather than a
4223 list of two elements, each itself a list of two elements. This
4224 routine transforms INIT from the former form into the latter. The
4225 revised initializer is returned. */
4228 reshape_init (tree type, tree *initp)
4232 tree old_init_value;
4234 bool brace_enclosed_p;
4237 old_init_value = (TREE_CODE (*initp) == TREE_LIST
4238 ? TREE_VALUE (*initp) : old_init);
4240 gcc_assert (old_init_value);
4242 /* If the initializer is brace-enclosed, pull initializers from the
4243 enclosed elements. Advance past the brace-enclosed initializer
4245 if (TREE_CODE (old_init_value) == CONSTRUCTOR
4246 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value))
4248 *initp = TREE_CHAIN (old_init);
4249 TREE_CHAIN (old_init) = NULL_TREE;
4250 inits = CONSTRUCTOR_ELTS (old_init_value);
4252 brace_enclosed_p = true;
4257 brace_enclosed_p = false;
4260 /* A non-aggregate type is always initialized with a single
4262 if (!CP_AGGREGATE_TYPE_P (type))
4264 *initp = TREE_CHAIN (old_init);
4265 TREE_CHAIN (old_init) = NULL_TREE;
4266 /* It is invalid to initialize a non-aggregate type with a
4267 brace-enclosed initializer. */
4268 if (brace_enclosed_p)
4270 error ("brace-enclosed initializer used to initialize `%T'",
4272 if (TREE_CODE (old_init) == TREE_LIST)
4273 TREE_VALUE (old_init) = error_mark_node;
4275 old_init = error_mark_node;
4283 All implicit type conversions (clause _conv_) are considered when
4284 initializing the aggregate member with an initializer from an
4285 initializer-list. If the initializer can initialize a member,
4286 the member is initialized. Otherwise, if the member is itself a
4287 non-empty subaggregate, brace elision is assumed and the
4288 initializer is considered for the initialization of the first
4289 member of the subaggregate. */
4290 if (!brace_enclosed_p
4291 && can_convert_arg (type, TREE_TYPE (old_init_value), old_init_value))
4293 *initp = TREE_CHAIN (old_init);
4294 TREE_CHAIN (old_init) = NULL_TREE;
4298 if (TREE_CODE (old_init_value) == STRING_CST
4299 && TREE_CODE (type) == ARRAY_TYPE
4300 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4302 /* [dcl.init.string]
4304 A char array (whether plain char, signed char, or unsigned char)
4305 can be initialized by a string-literal (optionally enclosed in
4306 braces); a wchar_t array can be initialized by a wide
4307 string-literal (optionally enclosed in braces). */
4308 new_init = old_init;
4309 /* Move past the initializer. */
4310 *initp = TREE_CHAIN (old_init);
4311 TREE_CHAIN (old_init) = NULL_TREE;
4315 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4316 new_init = build_constructor (NULL_TREE, NULL_TREE);
4318 if (CLASS_TYPE_P (type))
4322 field = next_initializable_field (TYPE_FIELDS (type));
4328 An initializer for an aggregate member that is an
4329 empty class shall have the form of an empty
4330 initializer-list {}. */
4331 if (!brace_enclosed_p)
4333 error ("initializer for `%T' must be brace-enclosed",
4335 return error_mark_node;
4340 /* Loop through the initializable fields, gathering
4346 /* Handle designated initializers, as an extension. */
4347 if (TREE_PURPOSE (*initp))
4350 pedwarn ("ISO C++ does not allow designated initializers");
4351 field = lookup_field_1 (type, TREE_PURPOSE (*initp),
4352 /*want_type=*/false);
4353 if (!field || TREE_CODE (field) != FIELD_DECL)
4354 error ("`%T' has no non-static data member named `%D'",
4355 type, TREE_PURPOSE (*initp));
4360 field_init = reshape_init (TREE_TYPE (field), initp);
4361 if (field_init == error_mark_node)
4362 return error_mark_node;
4363 TREE_CHAIN (field_init) = CONSTRUCTOR_ELTS (new_init);
4364 CONSTRUCTOR_ELTS (new_init) = field_init;
4367 When a union is initialized with a brace-enclosed
4368 initializer, the braces shall only contain an
4369 initializer for the first member of the union. */
4370 if (TREE_CODE (type) == UNION_TYPE)
4372 field = next_initializable_field (TREE_CHAIN (field));
4376 else if (TREE_CODE (type) == ARRAY_TYPE
4377 || TREE_CODE (type) == VECTOR_TYPE)
4379 /* If the bound of the array is known, take no more initializers
4380 than are allowed. */
4381 tree max_index = NULL_TREE;
4382 if (TREE_CODE (type) == ARRAY_TYPE)
4384 if (TYPE_DOMAIN (type))
4385 max_index = array_type_nelts (type);
4389 /* For a vector, the representation type is a struct
4390 containing a single member which is an array of the
4391 appropriate size. */
4392 tree rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4393 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4394 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS
4398 if (!reshape_init_array (TREE_TYPE (type), max_index,
4400 return error_mark_node;
4405 /* The initializers were placed in reverse order in the
4407 CONSTRUCTOR_ELTS (new_init) = nreverse (CONSTRUCTOR_ELTS (new_init));
4409 if (TREE_CODE (old_init) == TREE_LIST)
4410 new_init = build_tree_list (TREE_PURPOSE (old_init), new_init);
4413 /* If this was a brace-enclosed initializer and all of the
4414 initializers were not used up, there is a problem. */
4415 if (brace_enclosed_p && *initp)
4416 error ("too many initializers for `%T'", type);
4421 /* Verify INIT (the initializer for DECL), and record the
4422 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4423 grok_reference_init.
4425 If the return value is non-NULL, it is an expression that must be
4426 evaluated dynamically to initialize DECL. */
4429 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4431 tree type = TREE_TYPE (decl);
4432 tree init_code = NULL;
4434 /* If `start_decl' didn't like having an initialization, ignore it now. */
4435 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
4438 /* If an initializer is present, DECL_INITIAL has been
4439 error_mark_node, to indicate that an as-of-yet unevaluated
4440 initialization will occur. From now on, DECL_INITIAL reflects
4441 the static initialization -- if any -- of DECL. */
4442 DECL_INITIAL (decl) = NULL_TREE;
4444 /* Things that are going to be initialized need to have complete
4446 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4448 if (type == error_mark_node)
4449 /* We will have already complained. */
4451 else if (init && COMPLETE_TYPE_P (type)
4452 && !TREE_CONSTANT (TYPE_SIZE (type)))
4454 error ("variable-sized object `%D' may not be initialized", decl);
4457 else if (TREE_CODE (type) == ARRAY_TYPE
4458 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4460 error ("elements of array `%#D' have incomplete type", decl);
4463 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4465 error ("`%D' has incomplete type", decl);
4466 TREE_TYPE (decl) = error_mark_node;
4470 if (TREE_CODE (decl) == CONST_DECL)
4472 gcc_assert (TREE_CODE (decl) != REFERENCE_TYPE);
4474 DECL_INITIAL (decl) = init;
4476 gcc_assert (init != NULL_TREE);
4479 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4480 init = grok_reference_init (decl, type, init, cleanup);
4483 if (TREE_CODE (init) == CONSTRUCTOR
4484 && BRACE_ENCLOSED_INITIALIZER_P (init))
4486 /* [dcl.init] paragraph 13,
4487 If T is a scalar type, then a declaration of the form
4492 reshape_init will complain about the extra braces,
4493 and doesn't do anything useful in the case where TYPE is
4494 scalar, so just don't call it. */
4495 if (CP_AGGREGATE_TYPE_P (type))
4496 init = reshape_init (type, &init);
4498 if ((*targetm.vector_opaque_p) (type))
4500 error ("opaque vector types cannot be initialized");
4501 init = error_mark_node;
4505 /* If DECL has an array type without a specific bound, deduce the
4506 array size from the initializer. */
4507 maybe_deduce_size_from_array_init (decl, init);
4508 type = TREE_TYPE (decl);
4510 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4512 if (TREE_CODE (type) == ARRAY_TYPE)
4513 goto initialize_aggr;
4514 else if (TREE_CODE (init) == CONSTRUCTOR
4515 && BRACE_ENCLOSED_INITIALIZER_P (init))
4517 if (TYPE_NON_AGGREGATE_CLASS (type))
4519 error ("`%D' must be initialized by constructor, not by `{...}'",
4521 init = error_mark_node;
4524 goto dont_use_constructor;
4528 int saved_stmts_are_full_exprs_p;
4531 saved_stmts_are_full_exprs_p = 0;
4532 if (building_stmt_tree ())
4534 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4535 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4537 init = build_aggr_init (decl, init, flags);
4538 if (building_stmt_tree ())
4539 current_stmt_tree ()->stmts_are_full_exprs_p =
4540 saved_stmts_are_full_exprs_p;
4546 dont_use_constructor:
4547 if (TREE_CODE (init) != TREE_VEC)
4549 init_code = store_init_value (decl, init);
4554 else if (DECL_EXTERNAL (decl))
4556 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4557 goto initialize_aggr;
4558 else if (IS_AGGR_TYPE (type))
4560 tree core_type = strip_array_types (type);
4562 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4563 error ("structure `%D' with uninitialized const members", decl);
4564 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4565 error ("structure `%D' with uninitialized reference members",
4568 check_for_uninitialized_const_var (decl);
4571 check_for_uninitialized_const_var (decl);
4573 if (init && init != error_mark_node)
4574 init_code = build2 (INIT_EXPR, type, decl, init);
4579 /* If DECL is not a local variable, give it RTL. */
4582 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4584 int toplev = toplevel_bindings_p ();
4587 /* Set the DECL_ASSEMBLER_NAME for the object. */
4590 /* The `register' keyword, when used together with an
4591 asm-specification, indicates that the variable should be
4592 placed in a particular register. */
4593 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4595 change_decl_assembler_name (decl, get_identifier (asmspec));
4596 DECL_HARD_REGISTER (decl) = 1;
4599 set_user_assembler_name (decl, asmspec);
4602 /* Handle non-variables up front. */
4603 if (TREE_CODE (decl) != VAR_DECL)
4605 rest_of_decl_compilation (decl, toplev, at_eof);
4609 /* If we see a class member here, it should be a static data
4611 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4613 gcc_assert (TREE_STATIC (decl));
4614 /* An in-class declaration of a static data member should be
4615 external; it is only a declaration, and not a definition. */
4616 if (init == NULL_TREE)
4617 gcc_assert (DECL_EXTERNAL (decl));
4620 /* We don't create any RTL for local variables. */
4621 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4624 /* We defer emission of local statics until the corresponding
4625 DECL_EXPR is expanded. */
4626 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4628 /* We try to defer namespace-scope static constants so that they are
4629 not emitted into the object file unnecessarily. */
4630 if (!DECL_VIRTUAL_P (decl)
4631 && TREE_READONLY (decl)
4632 && DECL_INITIAL (decl) != NULL_TREE
4633 && DECL_INITIAL (decl) != error_mark_node
4634 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4636 && !TREE_PUBLIC (decl))
4638 /* Fool with the linkage of static consts according to #pragma
4640 struct c_fileinfo *finfo = get_fileinfo (lbasename (input_filename));
4641 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4643 TREE_PUBLIC (decl) = 1;
4644 DECL_EXTERNAL (decl) = finfo->interface_only;
4649 /* Likewise for template instantiations. */
4650 else if (DECL_LANG_SPECIFIC (decl)
4651 && DECL_IMPLICIT_INSTANTIATION (decl))
4654 /* If we're not deferring, go ahead and assemble the variable. */
4656 rest_of_decl_compilation (decl, toplev, at_eof);
4659 /* Generate code to initialize DECL (a local variable). */
4662 initialize_local_var (tree decl, tree init)
4664 tree type = TREE_TYPE (decl);
4667 gcc_assert (TREE_CODE (decl) == VAR_DECL
4668 || TREE_CODE (decl) == RESULT_DECL);
4669 gcc_assert (!TREE_STATIC (decl));
4671 if (DECL_SIZE (decl) == NULL_TREE)
4673 /* If we used it already as memory, it must stay in memory. */
4674 DECL_INITIAL (decl) = NULL_TREE;
4675 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4678 if (DECL_SIZE (decl) && type != error_mark_node)
4682 /* Compute and store the initial value. */
4683 already_used = TREE_USED (decl) || TREE_USED (type);
4685 /* Perform the initialization. */
4688 int saved_stmts_are_full_exprs_p;
4690 gcc_assert (building_stmt_tree ());
4691 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4692 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4693 finish_expr_stmt (init);
4694 current_stmt_tree ()->stmts_are_full_exprs_p =
4695 saved_stmts_are_full_exprs_p;
4698 /* Set this to 0 so we can tell whether an aggregate which was
4699 initialized was ever used. Don't do this if it has a
4700 destructor, so we don't complain about the 'resource
4701 allocation is initialization' idiom. Now set
4702 attribute((unused)) on types so decls of that type will be
4703 marked used. (see TREE_USED, above.) */
4704 if (TYPE_NEEDS_CONSTRUCTING (type)
4706 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4707 && DECL_NAME (decl))
4708 TREE_USED (decl) = 0;
4709 else if (already_used)
4710 TREE_USED (decl) = 1;
4713 /* Generate a cleanup, if necessary. */
4714 cleanup = cxx_maybe_build_cleanup (decl);
4715 if (DECL_SIZE (decl) && cleanup)
4716 finish_decl_cleanup (decl, cleanup);
4719 /* DECL is a VAR_DECL for a compiler-generated variable with static
4720 storage duration (like a virtual table) whose initializer is a
4721 compile-time constant. Initialize the variable and provide it to
4725 initialize_artificial_var (tree decl, tree init)
4727 DECL_INITIAL (decl) = build_constructor (NULL_TREE, init);
4728 DECL_INITIALIZED_P (decl) = 1;
4729 determine_visibility (decl);
4730 layout_var_decl (decl);
4731 maybe_commonize_var (decl);
4732 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
4735 /* Finish processing of a declaration;
4736 install its line number and initial value.
4737 If the length of an array type is not known before,
4738 it must be determined now, from the initial value, or it is an error.
4740 INIT holds the value of an initializer that should be allowed to escape
4743 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4744 if the (init) syntax was used. */
4747 cp_finish_decl (tree decl, tree init, tree asmspec_tree, int flags)
4750 tree ttype = NULL_TREE;
4752 const char *asmspec = NULL;
4753 int was_readonly = 0;
4755 if (decl == error_mark_node)
4760 error ("assignment (not initialization) in declaration");
4764 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
4766 /* Assume no cleanup is required. */
4767 cleanup = NULL_TREE;
4769 /* If a name was specified, get the string. */
4770 if (global_scope_p (current_binding_level))
4771 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
4773 asmspec = TREE_STRING_POINTER (asmspec_tree);
4775 if (init && TREE_CODE (init) == NAMESPACE_DECL)
4777 error ("cannot initialize `%D' to namespace `%D'",
4782 if (current_class_type
4783 && CP_DECL_CONTEXT (decl) == current_class_type
4784 && TYPE_BEING_DEFINED (current_class_type)
4785 && (DECL_INITIAL (decl) || init))
4786 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
4788 type = TREE_TYPE (decl);
4790 if (type == error_mark_node)
4793 if (TYPE_HAS_MUTABLE_P (type))
4794 TREE_READONLY (decl) = 0;
4796 if (processing_template_decl)
4798 /* Add this declaration to the statement-tree. */
4799 if (at_function_scope_p ())
4800 add_decl_expr (decl);
4802 if (init && DECL_INITIAL (decl))
4803 DECL_INITIAL (decl) = init;
4804 if (TREE_CODE (decl) == VAR_DECL
4805 && !DECL_PRETTY_FUNCTION_P (decl)
4806 && !dependent_type_p (TREE_TYPE (decl)))
4807 maybe_deduce_size_from_array_init (decl, init);
4811 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4812 gcc_assert (TREE_CODE (decl) != PARM_DECL);
4814 /* Take care of TYPE_DECLs up front. */
4815 if (TREE_CODE (decl) == TYPE_DECL)
4817 if (type != error_mark_node
4818 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
4820 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
4821 warning ("shadowing previous type declaration of `%#D'", decl);
4822 set_identifier_type_value (DECL_NAME (decl), decl);
4825 /* If we have installed this as the canonical typedef for this
4826 type, and that type has not been defined yet, delay emitting
4827 the debug information for it, as we will emit it later. */
4828 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
4829 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
4830 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
4832 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
4837 if (TREE_CODE (decl) != FUNCTION_DECL)
4838 ttype = target_type (type);
4841 /* Currently, GNU C++ puts constants in text space, making them
4842 impossible to initialize. In the future, one would hope for
4843 an operating system which understood the difference between
4844 initialization and the running of a program. */
4845 if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl))
4848 if (TYPE_NEEDS_CONSTRUCTING (type)
4849 || TREE_CODE (type) == REFERENCE_TYPE)
4850 TREE_READONLY (decl) = 0;
4853 if (TREE_CODE (decl) == VAR_DECL)
4855 /* Only PODs can have thread-local storage. Other types may require
4856 various kinds of non-trivial initialization. */
4857 if (DECL_THREAD_LOCAL (decl) && !pod_type_p (TREE_TYPE (decl)))
4858 error ("`%D' cannot be thread-local because it has non-POD type `%T'",
4859 decl, TREE_TYPE (decl));
4860 /* Convert the initializer to the type of DECL, if we have not
4861 already initialized DECL. */
4862 if (!DECL_INITIALIZED_P (decl)
4863 /* If !DECL_EXTERNAL then DECL is being defined. In the
4864 case of a static data member initialized inside the
4865 class-specifier, there can be an initializer even if DECL
4866 is *not* defined. */
4867 && (!DECL_EXTERNAL (decl) || init))
4869 init = check_initializer (decl, init, flags, &cleanup);
4870 /* Thread-local storage cannot be dynamically initialized. */
4871 if (DECL_THREAD_LOCAL (decl) && init)
4873 error ("`%D' is thread-local and so cannot be dynamically "
4874 "initialized", decl);
4881 The memory occupied by any object of static storage
4882 duration is zero-initialized at program startup before
4883 any other initialization takes place.
4885 We cannot create an appropriate initializer until after
4886 the type of DECL is finalized. If DECL_INITIAL is set,
4887 then the DECL is statically initialized, and any
4888 necessary zero-initialization has already been performed. */
4889 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
4890 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
4891 /*nelts=*/NULL_TREE,
4892 /*static_storage_p=*/true);
4893 /* Remember that the initialization for this variable has
4895 DECL_INITIALIZED_P (decl) = 1;
4896 /* The variable is being defined, so determine its
4898 determine_visibility (decl);
4900 /* If the variable has an array type, lay out the type, even if
4901 there is no initializer. It is valid to index through the
4902 array, and we must get TYPE_ALIGN set correctly on the array
4904 else if (TREE_CODE (type) == ARRAY_TYPE)
4908 /* Add this declaration to the statement-tree. This needs to happen
4909 after the call to check_initializer so that the DECL_EXPR for a
4910 reference temp is added before the DECL_EXPR for the reference itself. */
4911 if (at_function_scope_p ())
4912 add_decl_expr (decl);
4914 if (TREE_CODE (decl) == VAR_DECL)
4915 layout_var_decl (decl);
4917 /* Output the assembler code and/or RTL code for variables and functions,
4918 unless the type is an undefined structure or union.
4919 If not, it will get done when the type is completed. */
4920 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL)
4922 if (TREE_CODE (decl) == VAR_DECL)
4923 maybe_commonize_var (decl);
4925 make_rtl_for_nonlocal_decl (decl, init, asmspec);
4927 /* Check for abstractness of the type. Notice that there is no
4928 need to strip array types here since the check for those types
4929 is already done within create_array_type_for_decl. */
4930 if (TREE_CODE (type) == FUNCTION_TYPE
4931 || TREE_CODE (type) == METHOD_TYPE)
4932 abstract_virtuals_error (decl, TREE_TYPE (type));
4934 abstract_virtuals_error (decl, type);
4936 if (TREE_CODE (decl) == FUNCTION_DECL
4937 || TREE_TYPE (decl) == error_mark_node)
4938 /* No initialization required. */
4940 else if (DECL_EXTERNAL (decl)
4941 && ! (DECL_LANG_SPECIFIC (decl)
4942 && DECL_NOT_REALLY_EXTERN (decl)))
4945 DECL_INITIAL (decl) = init;
4949 /* A variable definition. */
4950 if (DECL_FUNCTION_SCOPE_P (decl))
4952 /* Initialize the local variable. */
4953 if (processing_template_decl)
4955 if (init || DECL_INITIAL (decl) == error_mark_node)
4956 DECL_INITIAL (decl) = init;
4958 else if (!TREE_STATIC (decl))
4959 initialize_local_var (decl, init);
4962 if (TREE_STATIC (decl))
4963 expand_static_init (decl, init);
4967 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
4968 reference, insert it in the statement-tree now. */
4970 push_cleanup (decl, cleanup, false);
4975 TREE_READONLY (decl) = 1;
4977 /* If this was marked 'used', be sure it will be output. */
4978 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
4979 mark_decl_referenced (decl);
4982 /* This is here for a midend callback from c-common.c. */
4985 finish_decl (tree decl, tree init, tree asmspec_tree)
4987 cp_finish_decl (decl, init, asmspec_tree, 0);
4990 /* Returns a declaration for a VAR_DECL as if:
4992 extern "C" TYPE NAME;
4994 had been seen. Used to create compiler-generated global
4998 declare_global_var (tree name, tree type)
5002 push_to_top_level ();
5003 decl = build_decl (VAR_DECL, name, type);
5004 TREE_PUBLIC (decl) = 1;
5005 DECL_EXTERNAL (decl) = 1;
5006 DECL_ARTIFICIAL (decl) = 1;
5008 cp_finish_decl (decl, NULL_TREE, NULL_TREE, 0);
5009 pop_from_top_level ();
5014 /* Returns a pointer to the `atexit' function. Note that if
5015 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5016 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5019 get_atexit_node (void)
5030 if (flag_use_cxa_atexit)
5032 /* The declaration for `__cxa_atexit' is:
5034 int __cxa_atexit (void (*)(void *), void *, void *)
5036 We build up the argument types and then then function type
5039 /* First, build the pointer-to-function type for the first
5041 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5042 fn_type = build_function_type (void_type_node, arg_types);
5043 fn_ptr_type = build_pointer_type (fn_type);
5044 /* Then, build the rest of the argument types. */
5045 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5046 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5047 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5048 /* And the final __cxa_atexit type. */
5049 fn_type = build_function_type (integer_type_node, arg_types);
5050 fn_ptr_type = build_pointer_type (fn_type);
5051 name = "__cxa_atexit";
5055 /* The declaration for `atexit' is:
5057 int atexit (void (*)());
5059 We build up the argument types and then then function type
5061 fn_type = build_function_type (void_type_node, void_list_node);
5062 fn_ptr_type = build_pointer_type (fn_type);
5063 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5064 /* Build the final atexit type. */
5065 fn_type = build_function_type (integer_type_node, arg_types);
5069 /* Now, build the function declaration. */
5070 push_lang_context (lang_name_c);
5071 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5072 mark_used (atexit_fndecl);
5073 pop_lang_context ();
5074 atexit_node = decay_conversion (atexit_fndecl);
5079 /* Returns the __dso_handle VAR_DECL. */
5082 get_dso_handle_node (void)
5084 if (dso_handle_node)
5085 return dso_handle_node;
5087 /* Declare the variable. */
5088 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5091 return dso_handle_node;
5094 /* Begin a new function with internal linkage whose job will be simply
5095 to destroy some particular variable. */
5097 static GTY(()) int start_cleanup_cnt;
5100 start_cleanup_fn (void)
5107 push_to_top_level ();
5109 /* No need to mangle this. */
5110 push_lang_context (lang_name_c);
5112 /* Build the parameter-types. */
5113 parmtypes = void_list_node;
5114 /* Functions passed to __cxa_atexit take an additional parameter.
5115 We'll just ignore it. After we implement the new calling
5116 convention for destructors, we can eliminate the use of
5117 additional cleanup functions entirely in the -fnew-abi case. */
5118 if (flag_use_cxa_atexit)
5119 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5120 /* Build the function type itself. */
5121 fntype = build_function_type (void_type_node, parmtypes);
5122 /* Build the name of the function. */
5123 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5124 /* Build the function declaration. */
5125 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5126 /* It's a function with internal linkage, generated by the
5128 TREE_PUBLIC (fndecl) = 0;
5129 DECL_ARTIFICIAL (fndecl) = 1;
5130 /* Make the function `inline' so that it is only emitted if it is
5131 actually needed. It is unlikely that it will be inlined, since
5132 it is only called via a function pointer, but we avoid unnecessary
5133 emissions this way. */
5134 DECL_INLINE (fndecl) = 1;
5135 DECL_DECLARED_INLINE_P (fndecl) = 1;
5136 DECL_INTERFACE_KNOWN (fndecl) = 1;
5137 /* Build the parameter. */
5138 if (flag_use_cxa_atexit)
5142 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5143 DECL_CONTEXT (parmdecl) = fndecl;
5144 TREE_USED (parmdecl) = 1;
5145 DECL_ARGUMENTS (fndecl) = parmdecl;
5149 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5151 pop_lang_context ();
5153 return current_function_decl;
5156 /* Finish the cleanup function begun by start_cleanup_fn. */
5159 end_cleanup_fn (void)
5161 expand_or_defer_fn (finish_function (0));
5163 pop_from_top_level ();
5166 /* Generate code to handle the destruction of DECL, an object with
5167 static storage duration. */
5170 register_dtor_fn (tree decl)
5177 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5178 return void_zero_node;
5180 /* Call build_cleanup before we enter the anonymous function so that
5181 any access checks will be done relative to the current scope,
5182 rather than the scope of the anonymous function. */
5183 build_cleanup (decl);
5185 /* Now start the function. */
5186 cleanup = start_cleanup_fn ();
5188 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5189 to the original function, rather than the anonymous one. That
5190 will make the back-end think that nested functions are in use,
5191 which causes confusion. */
5193 push_deferring_access_checks (dk_no_check);
5194 fcall = build_cleanup (decl);
5195 pop_deferring_access_checks ();
5197 /* Create the body of the anonymous function. */
5198 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5199 finish_expr_stmt (fcall);
5200 finish_compound_stmt (compound_stmt);
5203 /* Call atexit with the cleanup function. */
5204 cxx_mark_addressable (cleanup);
5205 mark_used (cleanup);
5206 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5207 if (flag_use_cxa_atexit)
5209 args = tree_cons (NULL_TREE,
5210 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5212 args = tree_cons (NULL_TREE, null_pointer_node, args);
5213 args = tree_cons (NULL_TREE, cleanup, args);
5216 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5217 return build_function_call (get_atexit_node (), args);
5220 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5221 is its initializer. Generate code to handle the construction
5222 and destruction of DECL. */
5225 expand_static_init (tree decl, tree init)
5227 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5228 gcc_assert (TREE_STATIC (decl));
5230 /* Some variables require no initialization. */
5232 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5233 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5236 if (DECL_FUNCTION_SCOPE_P (decl))
5238 /* Emit code to perform this initialization but once. */
5239 tree if_stmt, inner_if_stmt = NULL_TREE;
5240 tree then_clause, inner_then_clause = NULL_TREE;
5241 tree guard, guard_addr, guard_addr_list;
5242 tree acquire_fn, release_fn, abort_fn;
5245 /* Emit code to perform this initialization but once. This code
5248 static <type> guard;
5249 if (!guard.first_byte) {
5250 if (__cxa_guard_acquire (&guard)) {
5253 // Do initialization.
5254 flag = true; __cxa_guard_release (&guard);
5255 // Register variable for destruction at end of program.
5257 if (!flag) __cxa_guard_abort (&guard);
5261 Note that the `flag' variable is only set to 1 *after* the
5262 initialization is complete. This ensures that an exception,
5263 thrown during the construction, will cause the variable to
5264 reinitialized when we pass through this code again, as per:
5268 If the initialization exits by throwing an exception, the
5269 initialization is not complete, so it will be tried again
5270 the next time control enters the declaration.
5272 This process should be thread-safe, too; multiple threads
5273 should not be able to initialize the variable more than
5276 /* Create the guard variable. */
5277 guard = get_guard (decl);
5279 /* Begin the conditional initialization. */
5280 if_stmt = begin_if_stmt ();
5281 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5282 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5284 if (flag_threadsafe_statics)
5286 guard_addr = build_address (guard);
5287 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5289 acquire_fn = get_identifier ("__cxa_guard_acquire");
5290 release_fn = get_identifier ("__cxa_guard_release");
5291 abort_fn = get_identifier ("__cxa_guard_abort");
5292 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5294 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5296 tree vfntype = build_function_type (void_type_node, argtypes);
5297 acquire_fn = push_library_fn
5298 (acquire_fn, build_function_type (integer_type_node, argtypes));
5299 release_fn = push_library_fn (release_fn, vfntype);
5300 abort_fn = push_library_fn (abort_fn, vfntype);
5304 release_fn = identifier_global_value (release_fn);
5305 abort_fn = identifier_global_value (abort_fn);
5308 inner_if_stmt = begin_if_stmt ();
5309 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5312 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5313 begin = get_target_expr (boolean_false_node);
5314 flag = TARGET_EXPR_SLOT (begin);
5316 TARGET_EXPR_CLEANUP (begin)
5317 = build (COND_EXPR, void_type_node, flag,
5319 build_call (abort_fn, guard_addr_list));
5320 CLEANUP_EH_ONLY (begin) = 1;
5322 /* Do the initialization itself. */
5323 init = add_stmt_to_compound (begin, init);
5324 init = add_stmt_to_compound
5325 (init, build (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5326 init = add_stmt_to_compound
5327 (init, build_call (release_fn, guard_addr_list));
5330 init = add_stmt_to_compound (init, set_guard (guard));
5332 /* Use atexit to register a function for destroying this static
5334 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5336 finish_expr_stmt (init);
5338 if (flag_threadsafe_statics)
5340 finish_compound_stmt (inner_then_clause);
5341 finish_then_clause (inner_if_stmt);
5342 finish_if_stmt (inner_if_stmt);
5345 finish_compound_stmt (then_clause);
5346 finish_then_clause (if_stmt);
5347 finish_if_stmt (if_stmt);
5350 static_aggregates = tree_cons (init, decl, static_aggregates);
5354 /* Make TYPE a complete type based on INITIAL_VALUE.
5355 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5356 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5359 complete_array_type (tree type, tree initial_value, int do_default)
5361 tree maxindex = NULL_TREE;
5366 /* An array of character type can be initialized from a
5367 brace-enclosed string constant. */
5368 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
5369 && TREE_CODE (initial_value) == CONSTRUCTOR
5370 && CONSTRUCTOR_ELTS (initial_value)
5371 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value)))
5373 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value)) == NULL_TREE)
5374 initial_value = TREE_VALUE (CONSTRUCTOR_ELTS (initial_value));
5376 /* Note MAXINDEX is really the maximum index, one less than the
5378 if (TREE_CODE (initial_value) == STRING_CST)
5381 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
5382 maxindex = build_int_cst (NULL_TREE,
5383 (TREE_STRING_LENGTH (initial_value)
5386 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
5388 tree elts = CONSTRUCTOR_ELTS (initial_value);
5390 maxindex = ssize_int (-1);
5391 for (; elts; elts = TREE_CHAIN (elts))
5393 if (TREE_PURPOSE (elts))
5394 maxindex = TREE_PURPOSE (elts);
5396 maxindex = size_binop (PLUS_EXPR, maxindex, ssize_int (1));
5401 /* Make an error message unless that happened already. */
5402 if (initial_value != error_mark_node)
5405 initial_value = NULL_TREE;
5407 /* Prevent further error messages. */
5408 maxindex = build_int_cst (NULL_TREE, 0);
5415 maxindex = build_int_cst (NULL_TREE, 0);
5425 domain = build_index_type (maxindex);
5426 TYPE_DOMAIN (type) = domain;
5429 itype = TREE_TYPE (initial_value);
5432 if (itype && !TYPE_DOMAIN (itype))
5433 TYPE_DOMAIN (itype) = domain;
5434 /* The type of the main variant should never be used for arrays
5435 of different sizes. It should only ever be completed with the
5436 size of the array. */
5437 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
5438 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
5440 elt_type = TREE_TYPE (type);
5441 TYPE_NEEDS_CONSTRUCTING (type)
5442 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type));
5443 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5444 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type));
5447 /* Lay out the type now that we can get the real answer. */
5454 /* Return zero if something is declared to be a member of type
5455 CTYPE when in the context of CUR_TYPE. STRING is the error
5456 message to print in that case. Otherwise, quietly return 1. */
5459 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5461 if (ctype && ctype != cur_type)
5463 if (flags == DTOR_FLAG)
5464 error ("destructor for alien class `%T' cannot be a member",
5467 error ("constructor for alien class `%T' cannot be a member",
5474 /* Subroutine of `grokdeclarator'. */
5476 /* Generate errors possibly applicable for a given set of specifiers.
5477 This is for ARM $7.1.2. */
5480 bad_specifiers (tree object,
5489 error ("`%D' declared as a `virtual' %s", object, type);
5491 error ("`%D' declared as an `inline' %s", object, type);
5493 error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
5496 cp_error_at ("`%D' declared as a friend", object);
5498 && (TREE_CODE (object) == TYPE_DECL
5499 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5500 && !TYPE_REFFN_P (TREE_TYPE (object))
5501 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5502 cp_error_at ("`%D' declared with an exception specification", object);
5505 /* CTYPE is class type, or null if non-class.
5506 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5508 DECLARATOR is the function's name.
5509 PARMS is a chain of PARM_DECLs for the function.
5510 VIRTUALP is truthvalue of whether the function is virtual or not.
5511 FLAGS are to be passed through to `grokclassfn'.
5512 QUALS are qualifiers indicating whether the function is `const'
5514 RAISES is a list of exceptions that this function can raise.
5515 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5516 not look, and -1 if we should not call `grokclassfn' at all.
5518 Returns `NULL_TREE' if something goes wrong, after issuing
5519 applicable error messages. */
5522 grokfndecl (tree ctype,
5526 tree orig_declarator,
5528 enum overload_flags flags,
5540 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5541 int has_default_arg = 0;
5545 type = build_exception_variant (type, raises);
5547 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5548 DECL_ARGUMENTS (decl) = parms;
5549 /* Propagate volatile out from type to decl. */
5550 if (TYPE_VOLATILE (type))
5551 TREE_THIS_VOLATILE (decl) = 1;
5553 /* If this decl has namespace scope, set that up. */
5555 set_decl_namespace (decl, in_namespace, friendp);
5557 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5559 /* `main' and builtins have implicit 'C' linkage. */
5560 if ((MAIN_NAME_P (declarator)
5561 || (IDENTIFIER_LENGTH (declarator) > 10
5562 && IDENTIFIER_POINTER (declarator)[0] == '_'
5563 && IDENTIFIER_POINTER (declarator)[1] == '_'
5564 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5565 && current_lang_name == lang_name_cplusplus
5566 && ctype == NULL_TREE
5567 /* NULL_TREE means global namespace. */
5568 && DECL_CONTEXT (decl) == NULL_TREE)
5569 SET_DECL_LANGUAGE (decl, lang_c);
5571 /* Should probably propagate const out from type to decl I bet (mrs). */
5574 DECL_STATIC_FUNCTION_P (decl) = 1;
5575 DECL_CONTEXT (decl) = ctype;
5579 DECL_CONTEXT (decl) = ctype;
5581 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
5583 if (processing_template_decl)
5584 error ("cannot declare `::main' to be a template");
5586 error ("cannot declare `::main' to be inline");
5588 error ("cannot declare `::main' to be static");
5589 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
5591 error ("`main' must return `int'");
5596 /* Members of anonymous types and local classes have no linkage; make
5597 them internal. If a typedef is made later, this will be changed. */
5598 if (ctype && (TYPE_ANONYMOUS_P (ctype)
5599 || decl_function_context (TYPE_MAIN_DECL (ctype))))
5604 /* [basic.link]: A name with no linkage (notably, the name of a class
5605 or enumeration declared in a local scope) shall not be used to
5606 declare an entity with linkage.
5608 Only check this for public decls for now. See core 319, 389. */
5609 t = no_linkage_check (TREE_TYPE (decl),
5610 /*relaxed_p=*/false);
5613 if (TYPE_ANONYMOUS_P (t))
5615 if (DECL_EXTERN_C_P (decl))
5616 /* Allow this; it's pretty common in C. */;
5619 pedwarn ("non-local function `%#D' uses anonymous type",
5621 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5623 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5628 pedwarn ("non-local function `%#D' uses local type `%T'",
5633 TREE_PUBLIC (decl) = publicp;
5636 DECL_INTERFACE_KNOWN (decl) = 1;
5637 DECL_NOT_REALLY_EXTERN (decl) = 1;
5640 /* If the declaration was declared inline, mark it as such. */
5642 DECL_DECLARED_INLINE_P (decl) = 1;
5643 /* We inline functions that are explicitly declared inline, or, when
5644 the user explicitly asks us to, all functions. */
5645 if (DECL_DECLARED_INLINE_P (decl)
5646 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
5647 DECL_INLINE (decl) = 1;
5649 DECL_EXTERNAL (decl) = 1;
5650 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
5652 error ("%smember function `%D' cannot have cv-qualifier",
5653 (ctype ? "static " : "non-"), decl);
5654 quals = TYPE_UNQUALIFIED;
5657 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
5658 grok_op_properties (decl, friendp, /*complain=*/true);
5660 if (ctype && decl_function_context (decl))
5661 DECL_NO_STATIC_CHAIN (decl) = 1;
5663 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5664 if (TREE_PURPOSE (t)
5665 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5667 has_default_arg = 1;
5672 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5676 ("defining explicit specialization `%D' in friend declaration",
5680 tree fns = TREE_OPERAND (orig_declarator, 0);
5681 tree args = TREE_OPERAND (orig_declarator, 1);
5683 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5685 /* Something like `template <class T> friend void f<T>()'. */
5686 error ("invalid use of template-id `%D' in declaration of primary template",
5692 /* A friend declaration of the form friend void f<>(). Record
5693 the information in the TEMPLATE_ID_EXPR. */
5694 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5696 if (TREE_CODE (fns) == COMPONENT_REF)
5698 /* Due to bison parser ickiness, we will have already looked
5699 up an operator_name or PFUNCNAME within the current class
5700 (see template_id in parse.y). If the current class contains
5701 such a name, we'll get a COMPONENT_REF here. Undo that. */
5703 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5704 == current_class_type);
5705 fns = TREE_OPERAND (fns, 1);
5707 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5708 || TREE_CODE (fns) == OVERLOAD);
5709 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5711 if (has_default_arg)
5713 error ("default arguments are not allowed in declaration of friend template specialization `%D'",
5720 error ("`inline' is not allowed in declaration of friend template specialization `%D'",
5728 /* Make the init_value nonzero so pushdecl knows this is not
5729 tentative. error_mark_node is replaced later with the BLOCK. */
5730 DECL_INITIAL (decl) = error_mark_node;
5732 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
5733 TREE_NOTHROW (decl) = 1;
5735 /* Caller will do the rest of this. */
5739 if (flags == NO_SPECIAL && ctype && constructor_name_p (declarator, ctype))
5740 DECL_CONSTRUCTOR_P (decl) = 1;
5742 /* Function gets the ugly name, field gets the nice one. This call
5743 may change the type of the function (because of default
5745 if (ctype != NULL_TREE)
5746 grokclassfn (ctype, decl, flags, quals);
5748 decl = check_explicit_specialization (orig_declarator, decl,
5750 2 * (funcdef_flag != 0) +
5751 4 * (friendp != 0));
5752 if (decl == error_mark_node)
5755 if (ctype != NULL_TREE
5756 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
5761 old_decl = check_classfn (ctype, decl,
5762 (processing_template_decl
5763 > template_class_depth (ctype))
5764 ? current_template_parms
5767 if (old_decl && TREE_CODE (old_decl) == TEMPLATE_DECL)
5768 /* Because grokfndecl is always supposed to return a
5769 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5770 here. We depend on our callers to figure out that its
5771 really a template that's being returned. */
5772 old_decl = DECL_TEMPLATE_RESULT (old_decl);
5774 if (old_decl && DECL_STATIC_FUNCTION_P (old_decl)
5775 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
5776 /* Remove the `this' parm added by grokclassfn.
5777 XXX Isn't this done in start_function, too? */
5778 revert_static_member_fn (decl);
5779 if (old_decl && DECL_ARTIFICIAL (old_decl))
5780 error ("definition of implicitly-declared `%D'", old_decl);
5787 /* Since we've smashed OLD_DECL to its
5788 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5789 if (TREE_CODE (decl) == TEMPLATE_DECL)
5790 decl = DECL_TEMPLATE_RESULT (decl);
5792 /* Attempt to merge the declarations. This can fail, in
5793 the case of some invalid specialization declarations. */
5794 pop_p = push_scope (ctype);
5795 ok = duplicate_decls (decl, old_decl);
5800 error ("no `%#D' member function declared in class `%T'",
5808 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
5811 if (ctype == NULL_TREE || check)
5815 DECL_VIRTUAL_P (decl) = 1;
5820 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
5821 the linkage that DECL will receive in the object file. */
5824 set_linkage_for_static_data_member (tree decl)
5826 /* A static data member always has static storage duration and
5827 external linkage. Note that static data members are forbidden in
5828 local classes -- the only situation in which a class has
5829 non-external linkage. */
5830 TREE_PUBLIC (decl) = 1;
5831 TREE_STATIC (decl) = 1;
5832 /* For non-template classes, static data members are always put
5833 out in exactly those files where they are defined, just as
5834 with ordinary namespace-scope variables. */
5835 if (!processing_template_decl)
5836 DECL_INTERFACE_KNOWN (decl) = 1;
5839 /* Create a VAR_DECL named NAME with the indicated TYPE.
5841 If SCOPE is non-NULL, it is the class type or namespace containing
5842 the variable. If SCOPE is NULL, the variable should is created in
5843 the innermost enclosings scope. */
5846 grokvardecl (tree type,
5848 const cp_decl_specifier_seq *declspecs,
5855 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
5857 /* Compute the scope in which to place the variable. */
5860 /* An explicit "extern" specifier indicates a namespace-scope
5862 if (declspecs->storage_class == sc_extern)
5863 scope = current_namespace;
5864 else if (!at_function_scope_p ())
5866 scope = current_scope ();
5868 scope = current_namespace;
5873 && (/* If the variable is a namespace-scope variable declared in a
5874 template, we need DECL_LANG_SPECIFIC. */
5875 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
5876 /* Similarly for namespace-scope variables with language linkage
5878 || (TREE_CODE (scope) == NAMESPACE_DECL
5879 && current_lang_name != lang_name_cplusplus)
5880 /* Similarly for static data members. */
5882 decl = build_lang_decl (VAR_DECL, name, type);
5884 decl = build_decl (VAR_DECL, name, type);
5886 if (scope && TREE_CODE (scope) == NAMESPACE_DECL)
5887 set_decl_namespace (decl, scope, 0);
5889 DECL_CONTEXT (decl) = scope;
5891 if (declspecs->storage_class == sc_extern)
5893 DECL_THIS_EXTERN (decl) = 1;
5894 DECL_EXTERNAL (decl) = !initialized;
5897 if (DECL_CLASS_SCOPE_P (decl))
5899 set_linkage_for_static_data_member (decl);
5900 /* This function is only called with out-of-class definitions. */
5901 DECL_EXTERNAL (decl) = 0;
5903 /* At top level, either `static' or no s.c. makes a definition
5904 (perhaps tentative), and absence of `static' makes it public. */
5905 else if (toplevel_bindings_p ())
5907 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
5908 && (DECL_THIS_EXTERN (decl) || ! constp));
5909 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
5911 /* Not at top level, only `static' makes a static definition. */
5914 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
5915 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
5918 if (declspecs->specs[(int)ds_thread])
5920 if (targetm.have_tls)
5921 DECL_THREAD_LOCAL (decl) = 1;
5923 /* A mere warning is sure to result in improper semantics
5924 at runtime. Don't bother to allow this to compile. */
5925 error ("thread-local storage not supported for this target");
5928 if (TREE_PUBLIC (decl))
5930 /* [basic.link]: A name with no linkage (notably, the name of a class
5931 or enumeration declared in a local scope) shall not be used to
5932 declare an entity with linkage.
5934 Only check this for public decls for now. */
5935 tree t = no_linkage_check (TREE_TYPE (decl),
5936 /*relaxed_p=*/false);
5939 if (TYPE_ANONYMOUS_P (t))
5941 if (DECL_EXTERN_C_P (decl))
5942 /* Allow this; it's pretty common in C. */;
5945 pedwarn ("non-local variable `%#D' uses anonymous type",
5947 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5949 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5954 pedwarn ("non-local variable `%#D' uses local type `%T'",
5962 /* Create and return a canonical pointer to member function type, for
5963 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
5966 build_ptrmemfunc_type (tree type)
5970 tree unqualified_variant = NULL_TREE;
5972 if (type == error_mark_node)
5975 /* If a canonical type already exists for this type, use it. We use
5976 this method instead of type_hash_canon, because it only does a
5977 simple equality check on the list of field members. */
5979 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
5982 /* Make sure that we always have the unqualified pointer-to-member
5984 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
5986 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
5988 t = make_aggr_type (RECORD_TYPE);
5989 xref_basetypes (t, NULL_TREE);
5991 /* Let the front-end know this is a pointer to member function... */
5992 TYPE_PTRMEMFUNC_FLAG (t) = 1;
5993 /* ... and not really an aggregate. */
5994 SET_IS_AGGR_TYPE (t, 0);
5996 field = build_decl (FIELD_DECL, pfn_identifier, type);
5999 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6000 TREE_CHAIN (field) = fields;
6003 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6005 /* Zap out the name so that the back-end will give us the debugging
6006 information for this anonymous RECORD_TYPE. */
6007 TYPE_NAME (t) = NULL_TREE;
6009 /* If this is not the unqualified form of this pointer-to-member
6010 type, set the TYPE_MAIN_VARIANT for this type to be the
6011 unqualified type. Since they are actually RECORD_TYPEs that are
6012 not variants of each other, we must do this manually. */
6013 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6015 t = build_qualified_type (t, cp_type_quals (type));
6016 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6017 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6018 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6021 /* Cache this pointer-to-member type so that we can find it again
6023 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6028 /* Create and return a pointer to data member type. */
6031 build_ptrmem_type (tree class_type, tree member_type)
6033 if (TREE_CODE (member_type) == METHOD_TYPE)
6037 arg_types = TYPE_ARG_TYPES (member_type);
6038 class_type = (cp_build_qualified_type
6040 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6042 = build_method_type_directly (class_type,
6043 TREE_TYPE (member_type),
6044 TREE_CHAIN (arg_types));
6045 return build_ptrmemfunc_type (build_pointer_type (member_type));
6049 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6050 return build_offset_type (class_type, member_type);
6054 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6055 Check to see that the definition is valid. Issue appropriate error
6056 messages. Return 1 if the definition is particularly bad, or 0
6060 check_static_variable_definition (tree decl, tree type)
6062 /* Motion 10 at San Diego: If a static const integral data member is
6063 initialized with an integral constant expression, the initializer
6064 may appear either in the declaration (within the class), or in
6065 the definition, but not both. If it appears in the class, the
6066 member is a member constant. The file-scope definition is always
6068 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6070 error ("invalid in-class initialization of static data member of non-integral type `%T'",
6072 /* If we just return the declaration, crashes will sometimes
6073 occur. We therefore return void_type_node, as if this were a
6074 friend declaration, to cause callers to completely ignore
6075 this declaration. */
6078 else if (!CP_TYPE_CONST_P (type))
6079 error ("ISO C++ forbids in-class initialization of non-const static member `%D'",
6081 else if (pedantic && !INTEGRAL_TYPE_P (type))
6082 pedwarn ("ISO C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl, type);
6087 /* Given the SIZE (i.e., number of elements) in an array, compute an
6088 appropriate index type for the array. If non-NULL, NAME is the
6089 name of the thing being declared. */
6092 compute_array_index_type (tree name, tree size)
6094 tree type = TREE_TYPE (size);
6097 /* The array bound must be an integer type. */
6098 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6101 error ("size of array `%D' has non-integral type `%T'", name, type);
6103 error ("size of array has non-integral type `%T'", type);
6104 size = integer_one_node;
6105 type = TREE_TYPE (size);
6108 if (abi_version_at_least (2)
6109 /* We should only handle value dependent expressions specially. */
6110 ? value_dependent_expression_p (size)
6111 /* But for abi-1, we handled all instances in templates. This
6112 effects the manglings produced. */
6113 : processing_template_decl)
6114 return build_index_type (build_min (MINUS_EXPR, sizetype,
6115 size, integer_one_node));
6117 /* The size might be the result of a cast. */
6118 STRIP_TYPE_NOPS (size);
6120 /* It might be a const variable or enumeration constant. */
6121 size = decl_constant_value (size);
6123 /* Normally, the array-bound will be a constant. */
6124 if (TREE_CODE (size) == INTEGER_CST)
6126 /* Check to see if the array bound overflowed. Make that an
6127 error, no matter how generous we're being. */
6128 int old_flag_pedantic_errors = flag_pedantic_errors;
6129 int old_pedantic = pedantic;
6130 pedantic = flag_pedantic_errors = 1;
6131 constant_expression_warning (size);
6132 pedantic = old_pedantic;
6133 flag_pedantic_errors = old_flag_pedantic_errors;
6135 /* An array must have a positive number of elements. */
6136 if (INT_CST_LT (size, integer_zero_node))
6139 error ("size of array `%D' is negative", name);
6141 error ("size of array is negative");
6142 size = integer_one_node;
6144 /* As an extension we allow zero-sized arrays. We always allow
6145 them in system headers because glibc uses them. */
6146 else if (integer_zerop (size) && pedantic && !in_system_header)
6149 pedwarn ("ISO C++ forbids zero-size array `%D'", name);
6151 pedwarn ("ISO C++ forbids zero-size array");
6154 else if (TREE_CONSTANT (size))
6156 /* `(int) &fn' is not a valid array bound. */
6158 error ("size of array `%D' is not an integral constant-expression",
6161 error ("size of array is not an integral constant-expression");
6166 pedwarn ("ISO C++ forbids variable-size array `%D'", name);
6168 pedwarn ("ISO C++ forbids variable-size array");
6171 if (processing_template_decl && !TREE_CONSTANT (size))
6172 /* A variable sized array. */
6173 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6176 /* Compute the index of the largest element in the array. It is
6177 one less than the number of elements in the array. */
6179 = fold (cp_build_binary_op (MINUS_EXPR,
6180 cp_convert (ssizetype, size),
6181 cp_convert (ssizetype, integer_one_node)));
6182 if (!TREE_CONSTANT (itype))
6183 /* A variable sized array. */
6184 itype = variable_size (itype);
6185 /* Make sure that there was no overflow when creating to a signed
6186 index type. (For example, on a 32-bit machine, an array with
6187 size 2^32 - 1 is too big.) */
6188 else if (TREE_OVERFLOW (itype))
6190 error ("overflow in array dimension");
6191 TREE_OVERFLOW (itype) = 0;
6195 /* Create and return the appropriate index type. */
6196 return build_index_type (itype);
6199 /* Returns the scope (if any) in which the entity declared by
6200 DECLARATOR will be located. If the entity was declared with an
6201 unqualified name, NULL_TREE is returned. */
6204 get_scope_of_declarator (const cp_declarator *declarator)
6206 while (declarator && declarator->kind != cdk_id)
6207 declarator = declarator->declarator;
6209 /* If the declarator-id is a SCOPE_REF, the scope in which the
6210 declaration occurs is the first operand. */
6212 && declarator->u.id.name
6213 && TREE_CODE (declarator->u.id.name) == SCOPE_REF)
6214 return TREE_OPERAND (declarator->u.id.name, 0);
6216 /* Otherwise, the declarator is not a qualified name; the entity will
6217 be declared in the current scope. */
6221 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6222 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6226 create_array_type_for_decl (tree name, tree type, tree size)
6228 tree itype = NULL_TREE;
6229 const char* error_msg;
6231 /* If things have already gone awry, bail now. */
6232 if (type == error_mark_node || size == error_mark_node)
6233 return error_mark_node;
6235 /* Assume that everything will go OK. */
6238 /* There are some types which cannot be array elements. */
6239 switch (TREE_CODE (type))
6242 error_msg = "array of void";
6246 error_msg = "array of functions";
6249 case REFERENCE_TYPE:
6250 error_msg = "array of references";
6254 error_msg = "array of function members";
6261 /* If something went wrong, issue an error-message and return. */
6265 error ("declaration of `%D' as %s", name, error_msg);
6267 error ("creating %s", error_msg);
6269 return error_mark_node;
6274 The constant expressions that specify the bounds of the arrays
6275 can be omitted only for the first member of the sequence. */
6276 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6279 error ("declaration of `%D' as multidimensional array must have bounds for all dimensions except the first",
6282 error ("multidimensional array must have bounds for all dimensions except the first");
6284 return error_mark_node;
6287 /* Figure out the index type for the array. */
6289 itype = compute_array_index_type (name, size);
6292 T is called the array element type; this type shall not be [...] an
6293 abstract class type. */
6294 abstract_virtuals_error (name, type);
6296 return build_cplus_array_type (type, itype);
6299 /* Check that it's OK to declare a function with the indicated TYPE.
6300 SFK indicates the kind of special function (if any) that this
6301 function is. OPTYPE is the type given in a conversion operator
6302 declaration, or the class type for a constructor/destructor.
6303 Returns the actual return type of the function; that
6304 may be different than TYPE if an error occurs, or for certain
6305 special functions. */
6308 check_special_function_return_type (special_function_kind sfk,
6314 case sfk_constructor:
6316 error ("return type specification for constructor invalid");
6318 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6319 type = build_pointer_type (optype);
6321 type = void_type_node;
6324 case sfk_destructor:
6326 error ("return type specification for destructor invalid");
6327 /* We can't use the proper return type here because we run into
6328 problems with ambiguous bases and covariant returns.
6329 Java classes are left unchanged because (void *) isn't a valid
6330 Java type, and we don't want to change the Java ABI. */
6331 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6332 type = build_pointer_type (void_type_node);
6334 type = void_type_node;
6337 case sfk_conversion:
6338 if (type && !same_type_p (type, optype))
6339 error ("operator `%T' declared to return `%T'", optype, type);
6341 pedwarn ("return type specified for `operator %T'", optype);
6352 /* Given declspecs and a declarator (abstract or otherwise), determine
6353 the name and type of the object declared and construct a DECL node
6356 DECLSPECS is a chain of tree_list nodes whose value fields
6357 are the storage classes and type specifiers.
6359 DECL_CONTEXT says which syntactic context this declaration is in:
6360 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6361 FUNCDEF for a function definition. Like NORMAL but a few different
6362 error messages in each case. Return value may be zero meaning
6363 this definition is too screwy to try to parse.
6364 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6365 handle member functions (which have FIELD context).
6366 Return value may be zero meaning this definition is too screwy to
6368 PARM for a parameter declaration (either within a function prototype
6369 or before a function body). Make a PARM_DECL, or return void_type_node.
6370 CATCHPARM for a parameter declaration before a catch clause.
6371 TYPENAME if for a typename (in a cast or sizeof).
6372 Don't make a DECL node; just return the ..._TYPE node.
6373 FIELD for a struct or union field; make a FIELD_DECL.
6374 BITFIELD for a field with specified width.
6375 INITIALIZED is 1 if the decl has an initializer.
6377 ATTRLIST is a pointer to the list of attributes, which may be NULL
6378 if there are none; *ATTRLIST may be modified if attributes from inside
6379 the declarator should be applied to the declaration.
6381 When this function is called, scoping variables (such as
6382 CURRENT_CLASS_TYPE) should reflect the scope in which the
6383 declaration occurs, not the scope in which the new declaration will
6384 be placed. For example, on:
6388 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6389 should not be `S'. */
6392 grokdeclarator (const cp_declarator *declarator,
6393 const cp_decl_specifier_seq *declspecs,
6394 enum decl_context decl_context,
6398 tree type = NULL_TREE;
6401 int virtualp, explicitp, friendp, inlinep, staticp;
6402 int explicit_int = 0;
6403 int explicit_char = 0;
6404 int defaulted_int = 0;
6405 tree dependant_name = NULL_TREE;
6407 tree typedef_decl = NULL_TREE;
6408 const char *name = NULL;
6409 tree typedef_type = NULL_TREE;
6410 int funcdef_flag = 0;
6411 cp_declarator_kind innermost_code = cdk_error;
6414 /* See the code below that used this. */
6415 tree decl_attr = NULL_TREE;
6418 /* Keep track of what sort of function is being processed
6419 so that we can warn about default return values, or explicit
6420 return values which do not match prescribed defaults. */
6421 special_function_kind sfk = sfk_none;
6423 tree dname = NULL_TREE;
6424 tree ctor_return_type = NULL_TREE;
6425 enum overload_flags flags = NO_SPECIAL;
6426 cp_cv_quals quals = TYPE_UNQUALIFIED;
6427 tree raises = NULL_TREE;
6428 int template_count = 0;
6429 tree returned_attrs = NULL_TREE;
6430 tree parms = NULL_TREE;
6431 const cp_declarator *id_declarator;
6432 /* The unqualified name of the declarator; either an
6433 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6434 tree unqualified_id;
6435 /* The class type, if any, in which this entity is located,
6436 or NULL_TREE if none. Note that this value may be different from
6437 the current class type; for example if an attempt is made to declare
6438 "A::f" inside "B", this value will be "A". */
6439 tree ctype = current_class_type;
6440 /* The NAMESPACE_DECL for the namespace in which this entity is
6441 located. If an unqualified name is used to declare the entity,
6442 this value will be NULL_TREE, even if the entity is located at
6444 tree in_namespace = NULL_TREE;
6446 cp_storage_class storage_class;
6447 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6449 signed_p = declspecs->specs[(int)ds_signed];
6450 unsigned_p = declspecs->specs[(int)ds_unsigned];
6451 short_p = declspecs->specs[(int)ds_short];
6452 long_p = declspecs->specs[(int)ds_long];
6453 thread_p = declspecs->specs[(int)ds_thread];
6455 if (decl_context == FUNCDEF)
6456 funcdef_flag = 1, decl_context = NORMAL;
6457 else if (decl_context == MEMFUNCDEF)
6458 funcdef_flag = -1, decl_context = FIELD;
6459 else if (decl_context == BITFIELD)
6460 bitfield = 1, decl_context = FIELD;
6462 /* Look inside a declarator for the name being declared
6463 and get it as a string, for an error message. */
6464 for (id_declarator = declarator;
6466 id_declarator = id_declarator->declarator)
6468 if (id_declarator->kind != cdk_id)
6469 innermost_code = id_declarator->kind;
6471 switch (id_declarator->kind)
6474 if (id_declarator->declarator
6475 && id_declarator->declarator->kind == cdk_id)
6477 sfk = id_declarator->declarator->u.id.sfk;
6478 if (sfk == sfk_destructor)
6485 tree decl = id_declarator->u.id.name;
6488 if (TREE_CODE (decl) == SCOPE_REF)
6490 tree qualifying_scope = TREE_OPERAND (decl, 0);
6492 /* It is valid to write:
6494 class C { void f(); };
6498 The standard is not clear about whether `typedef const C D' is
6499 legal; as of 2002-09-15 the committee is considering
6500 that question. EDG 3.0 allows that syntax.
6501 Therefore, we do as well. */
6502 if (qualifying_scope && TYPE_P (qualifying_scope))
6504 ctype = TYPE_MAIN_VARIANT (qualifying_scope);
6505 if (innermost_code != cdk_function
6506 && current_class_type
6507 && !UNIQUELY_DERIVED_FROM_P (ctype,
6508 current_class_type))
6510 error ("type `%T' is not derived from type `%T'",
6511 ctype, current_class_type);
6514 TREE_OPERAND (decl, 0) = ctype;
6516 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6517 in_namespace = qualifying_scope;
6518 decl = TREE_OPERAND (decl, 1);
6520 if (TREE_CODE (decl) == BASELINK)
6521 decl = BASELINK_FUNCTIONS (decl);
6522 if (decl == error_mark_node)
6523 return error_mark_node;
6524 switch (TREE_CODE (decl))
6528 tree type = TREE_OPERAND (decl, 0);
6529 type = constructor_name (type);
6530 name = IDENTIFIER_POINTER (type);
6534 case TEMPLATE_ID_EXPR:
6536 tree fns = TREE_OPERAND (decl, 0);
6539 if (TREE_CODE (dname) == COMPONENT_REF)
6540 dname = TREE_OPERAND (dname, 1);
6541 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6543 gcc_assert (is_overloaded_fn (dname));
6544 dname = DECL_NAME (get_first_fn (dname));
6549 case IDENTIFIER_NODE:
6550 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6553 if (C_IS_RESERVED_WORD (dname))
6555 error ("declarator-id missing; using reserved word `%D'",
6557 name = IDENTIFIER_POINTER (dname);
6559 else if (!IDENTIFIER_TYPENAME_P (dname))
6560 name = IDENTIFIER_POINTER (dname);
6563 gcc_assert (flags == NO_SPECIAL);
6564 flags = TYPENAME_FLAG;
6565 ctor_return_type = TREE_TYPE (dname);
6566 sfk = sfk_conversion;
6567 if (is_typename_at_global_scope (dname))
6568 name = IDENTIFIER_POINTER (dname);
6570 name = "<invalid operator>";
6575 dname = constructor_name (TREE_TYPE (decl));
6576 name = IDENTIFIER_POINTER (dname);
6597 if (id_declarator->kind == cdk_id)
6601 /* A function definition's declarator must have the form of
6602 a function declarator. */
6604 if (funcdef_flag && innermost_code != cdk_function)
6607 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
6608 && innermost_code != cdk_function
6609 && ! (ctype && !declspecs->any_specifiers_p))
6611 error ("declaration of `%D' as non-function", dname);
6612 return void_type_node;
6615 /* Anything declared one level down from the top level
6616 must be one of the parameters of a function
6617 (because the body is at least two levels down). */
6619 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6620 by not allowing C++ class definitions to specify their parameters
6621 with xdecls (must be spec.d in the parmlist).
6623 Since we now wait to push a class scope until we are sure that
6624 we are in a legitimate method context, we must set oldcname
6625 explicitly (since current_class_name is not yet alive).
6627 We also want to avoid calling this a PARM if it is in a namespace. */
6629 if (decl_context == NORMAL && !toplevel_bindings_p ())
6631 struct cp_binding_level *b = current_binding_level;
6632 current_binding_level = b->level_chain;
6633 if (current_binding_level != 0 && toplevel_bindings_p ())
6634 decl_context = PARM;
6635 current_binding_level = b;
6639 name = decl_context == PARM ? "parameter" : "type name";
6641 /* If there were multiple types specified in the decl-specifier-seq,
6642 issue an error message. */
6643 if (declspecs->multiple_types_p)
6644 error ("two or more data types in declaration of `%s'", name);
6645 /* Extract the basic type from the decl-specifier-seq. */
6646 type = declspecs->type;
6647 if (type == error_mark_node)
6649 /* If the entire declaration is itself tagged as deprecated then
6650 suppress reports of deprecated items. */
6651 if (type && TREE_DEPRECATED (type)
6652 && deprecated_state != DEPRECATED_SUPPRESS)
6653 warn_deprecated_use (type);
6654 if (type && TREE_CODE (type) == TYPE_DECL)
6656 typedef_decl = type;
6657 type = TREE_TYPE (typedef_decl);
6659 /* No type at all: default to `int', and set DEFAULTED_INT
6660 because it was not a user-defined typedef. */
6661 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
6663 /* These imply 'int'. */
6664 type = integer_type_node;
6668 explicit_int = declspecs->explicit_int_p;
6669 explicit_char = declspecs->explicit_char_p;
6671 /* Check for repeated decl-specifiers. */
6672 for (ds = ds_first; ds != ds_last; ++ds)
6674 unsigned count = declspecs->specs[(int)ds];
6677 /* The "long" specifier is a special case because of
6682 error ("`long long long' is too long for GCC");
6683 else if (pedantic && !in_system_header && warn_long_long)
6684 pedwarn ("ISO C++ does not support `long long'");
6688 else if (declspecs->specs[(int)ds] > 1)
6690 static const char *const decl_spec_names[] = {
6706 error ("duplicate `%s'", decl_spec_names[(int)ds]);
6711 /* See the code below that used this. */
6713 decl_attr = DECL_ATTRIBUTES (typedef_decl);
6715 typedef_type = type;
6718 if (sfk != sfk_conversion)
6719 ctor_return_type = ctype;
6721 if (sfk != sfk_none)
6722 type = check_special_function_return_type (sfk, type,
6724 else if (type == NULL_TREE)
6730 /* We handle `main' specially here, because 'main () { }' is so
6731 common. With no options, it is allowed. With -Wreturn-type,
6732 it is a warning. It is only an error with -pedantic-errors. */
6733 is_main = (funcdef_flag
6734 && dname && MAIN_NAME_P (dname)
6735 && ctype == NULL_TREE
6736 && in_namespace == NULL_TREE
6737 && current_namespace == global_namespace);
6739 if (in_system_header || flag_ms_extensions)
6740 /* Allow it, sigh. */;
6741 else if (pedantic || ! is_main)
6742 pedwarn ("ISO C++ forbids declaration of `%s' with no type",
6744 else if (warn_return_type)
6745 warning ("ISO C++ forbids declaration of `%s' with no type",
6748 type = integer_type_node;
6753 /* Now process the modifiers that were specified
6754 and check for invalid combinations. */
6756 /* Long double is a special combination. */
6757 if (long_p && TYPE_MAIN_VARIANT (type) == double_type_node)
6760 type = build_qualified_type (long_double_type_node,
6761 cp_type_quals (type));
6764 /* Check all other uses of type modifiers. */
6766 if (unsigned_p || signed_p || long_p || short_p)
6770 if (TREE_CODE (type) == REAL_TYPE)
6771 error ("short, signed or unsigned invalid for `%s'", name);
6772 else if (TREE_CODE (type) != INTEGER_TYPE)
6773 error ("long, short, signed or unsigned invalid for `%s'", name);
6774 else if (long_p && short_p)
6775 error ("long and short specified together for `%s'", name);
6776 else if ((long_p || short_p) && explicit_char)
6777 error ("long or short specified with char for `%s'", name);
6778 else if ((long_p|| short_p) && TREE_CODE (type) == REAL_TYPE)
6779 error ("long or short specified with floating type for `%s'", name);
6780 else if (signed_p && unsigned_p)
6781 error ("signed and unsigned given together for `%s'", name);
6785 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
6787 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
6789 if (flag_pedantic_errors)
6794 /* Discard the type modifiers if they are invalid. */
6805 /* Decide whether an integer type is signed or not.
6806 Optionally treat bitfields as signed by default. */
6810 It is implementation-defined whether a plain (neither
6811 explicitly signed or unsigned) char, short, int, or long
6812 bit-field is signed or unsigned.
6814 Naturally, we extend this to long long as well. Note that
6815 this does not include wchar_t. */
6816 || (bitfield && !flag_signed_bitfields
6818 /* A typedef for plain `int' without `signed' can be
6819 controlled just like plain `int', but a typedef for
6820 `signed int' cannot be so controlled. */
6822 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
6823 && (TREE_CODE (type) == INTEGER_TYPE
6824 || TREE_CODE (type) == CHAR_TYPE)
6825 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
6828 type = long_long_unsigned_type_node;
6830 type = long_unsigned_type_node;
6832 type = short_unsigned_type_node;
6833 else if (type == char_type_node)
6834 type = unsigned_char_type_node;
6835 else if (typedef_decl)
6836 type = c_common_unsigned_type (type);
6838 type = unsigned_type_node;
6840 else if (signed_p && type == char_type_node)
6841 type = signed_char_type_node;
6843 type = long_long_integer_type_node;
6845 type = long_integer_type_node;
6847 type = short_integer_type_node;
6849 if (declspecs->specs[(int)ds_complex])
6851 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
6852 error ("complex invalid for `%s'", name);
6853 /* If we just have "complex", it is equivalent to
6854 "complex double", but if any modifiers at all are specified it is
6855 the complex form of TYPE. E.g, "complex short" is
6856 "complex short int". */
6858 else if (defaulted_int && ! longlong
6859 && ! (long_p || short_p || signed_p || unsigned_p))
6860 type = complex_double_type_node;
6861 else if (type == integer_type_node)
6862 type = complex_integer_type_node;
6863 else if (type == float_type_node)
6864 type = complex_float_type_node;
6865 else if (type == double_type_node)
6866 type = complex_double_type_node;
6867 else if (type == long_double_type_node)
6868 type = complex_long_double_type_node;
6870 type = build_complex_type (type);
6873 type_quals = TYPE_UNQUALIFIED;
6874 if (declspecs->specs[(int)ds_const])
6875 type_quals |= TYPE_QUAL_CONST;
6876 if (declspecs->specs[(int)ds_volatile])
6877 type_quals |= TYPE_QUAL_VOLATILE;
6878 if (declspecs->specs[(int)ds_restrict])
6879 type_quals |= TYPE_QUAL_RESTRICT;
6880 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
6881 error ("qualifiers are not allowed on declaration of `operator %T'",
6884 type_quals |= cp_type_quals (type);
6885 type = cp_build_qualified_type_real
6886 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
6887 ? tf_ignore_bad_quals : 0) | tf_error | tf_warning));
6888 /* We might have ignored or rejected some of the qualifiers. */
6889 type_quals = cp_type_quals (type);
6892 inlinep = !! declspecs->specs[(int)ds_inline];
6893 virtualp = !! declspecs->specs[(int)ds_virtual];
6894 explicitp = !! declspecs->specs[(int)ds_explicit];
6896 storage_class = declspecs->storage_class;
6897 if (storage_class == sc_static)
6898 staticp = 1 + (decl_context == FIELD);
6900 if (virtualp && staticp == 2)
6902 error ("member `%D' cannot be declared both virtual and static",
6906 friendp = !! declspecs->specs[(int)ds_friend];
6908 if (dependant_name && !friendp)
6910 error ("`%T::%D' is not a valid declarator", ctype, dependant_name);
6911 return void_type_node;
6914 /* Issue errors about use of storage classes for parameters. */
6915 if (decl_context == PARM)
6917 if (declspecs->specs[(int)ds_typedef])
6918 error ("typedef declaration invalid in parameter declaration");
6919 else if (storage_class == sc_static
6920 || storage_class == sc_extern
6922 error ("storage class specifiers invalid in parameter declarations");
6925 /* Give error if `virtual' is used outside of class declaration. */
6927 && (current_class_name == NULL_TREE || decl_context != FIELD))
6929 error ("virtual outside class declaration");
6933 /* Static anonymous unions are dealt with here. */
6934 if (staticp && decl_context == TYPENAME
6936 && ANON_AGGR_TYPE_P (declspecs->type))
6937 decl_context = FIELD;
6939 /* Warn about storage classes that are invalid for certain
6940 kinds of declarations (parameters, typenames, etc.). */
6941 if (declspecs->multiple_storage_classes_p)
6942 error ("multiple storage classes in declaration of `%s'", name);
6945 && storage_class != sc_extern
6946 && storage_class != sc_static)
6947 || declspecs->specs[(int)ds_typedef]))
6949 error ("multiple storage classes in declaration of `%s'", name);
6952 else if (decl_context != NORMAL
6953 && ((storage_class != sc_none
6954 && storage_class != sc_mutable)
6957 if ((decl_context == PARM || decl_context == CATCHPARM)
6958 && (storage_class == sc_register
6959 || storage_class == sc_auto))
6961 else if (declspecs->specs[(int)ds_typedef])
6963 else if (decl_context == FIELD
6964 /* C++ allows static class elements. */
6965 && storage_class == sc_static)
6966 /* C++ also allows inlines and signed and unsigned elements,
6967 but in those cases we don't come in here. */
6971 if (decl_context == FIELD)
6973 tree tmp = NULL_TREE;
6978 /* Avoid trying to get an operand off an identifier node. */
6979 if (declarator->kind != cdk_id)
6980 tmp = declarator->declarator->u.id.name;
6982 tmp = declarator->u.id.name;
6983 op = IDENTIFIER_OPNAME_P (tmp);
6984 if (IDENTIFIER_TYPENAME_P (tmp))
6986 if (is_typename_at_global_scope (tmp))
6987 name = IDENTIFIER_POINTER (tmp);
6989 name = "<invalid operator>";
6992 error ("storage class specified for %s `%s'",
6993 op ? "member operator" : "field",
6998 if (decl_context == PARM || decl_context == CATCHPARM)
6999 error ("storage class specified for parameter `%s'", name);
7001 error ("storage class specified for typename");
7003 if (storage_class == sc_register
7004 || storage_class == sc_auto
7005 || storage_class == sc_extern
7007 storage_class = sc_none;
7010 else if (storage_class == sc_extern && initialized
7013 if (toplevel_bindings_p ())
7015 /* It's common practice (and completely valid) to have a const
7016 be initialized and declared extern. */
7017 if (!(type_quals & TYPE_QUAL_CONST))
7018 warning ("`%s' initialized and declared `extern'", name);
7021 error ("`%s' has both `extern' and initializer", name);
7023 else if (storage_class == sc_extern && funcdef_flag
7024 && ! toplevel_bindings_p ())
7025 error ("nested function `%s' declared `extern'", name);
7026 else if (toplevel_bindings_p ())
7028 if (storage_class == sc_auto)
7029 error ("top-level declaration of `%s' specifies `auto'", name);
7032 && storage_class != sc_extern
7033 && storage_class != sc_static)
7035 error ("function-scope `%s' implicitly auto and declared `__thread'",
7040 if (storage_class && friendp)
7041 error ("storage class specifiers invalid in friend function declarations");
7044 unqualified_id = NULL_TREE;
7047 unqualified_id = id_declarator->u.id.name;
7048 if (TREE_CODE (unqualified_id) == SCOPE_REF)
7049 unqualified_id = TREE_OPERAND (unqualified_id, 1);
7050 if (TREE_CODE (unqualified_id) == BASELINK)
7051 unqualified_id = BASELINK_FUNCTIONS (unqualified_id);
7052 switch (TREE_CODE (unqualified_id))
7056 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7061 = constructor_name (TREE_TYPE (unqualified_id));
7064 case IDENTIFIER_NODE:
7065 case TEMPLATE_ID_EXPR:
7073 /* Determine the type of the entity declared by recurring on the
7076 declarator && declarator->kind != cdk_id;
7077 declarator = declarator->declarator)
7079 const cp_declarator *inner_declarator;
7082 if (type == error_mark_node)
7083 return error_mark_node;
7085 inner_declarator = declarator->declarator;
7087 attrs = declarator->attributes;
7093 if (declarator == NULL || declarator->kind == cdk_id)
7094 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7095 if (declarator->kind == cdk_function)
7096 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7097 if (declarator->kind == cdk_array)
7098 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7099 returned_attrs = decl_attributes (&type,
7100 chainon (returned_attrs, attrs),
7104 switch (declarator->kind)
7107 type = create_array_type_for_decl (dname, type,
7108 declarator->u.array.bounds);
7109 if (inner_declarator
7110 && (inner_declarator->kind == cdk_pointer
7111 || inner_declarator->kind == cdk_reference
7112 || inner_declarator->kind == cdk_ptrmem))
7113 /* We can never complete an array type which is the
7114 target of a pointer, so go ahead and lay it out. */
7123 /* Declaring a function type.
7124 Make sure we have a valid type for the function to return. */
7126 /* We now know that the TYPE_QUALS don't apply to the
7127 decl, but to its return type. */
7128 type_quals = TYPE_UNQUALIFIED;
7130 /* Warn about some types functions can't return. */
7132 if (TREE_CODE (type) == FUNCTION_TYPE)
7134 error ("`%s' declared as function returning a function", name);
7135 type = integer_type_node;
7137 if (TREE_CODE (type) == ARRAY_TYPE)
7139 error ("`%s' declared as function returning an array", name);
7140 type = integer_type_node;
7143 /* Pick up type qualifiers which should be applied to `this'. */
7144 quals = declarator->u.function.qualifiers;
7146 /* Pick up the exception specifications. */
7147 raises = declarator->u.function.exception_specification;
7149 /* Say it's a definition only for the CALL_EXPR
7150 closest to the identifier. */
7151 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7153 if (ctype == NULL_TREE
7154 && decl_context == FIELD
7156 && (friendp == 0 || dname == current_class_name))
7157 ctype = current_class_type;
7159 if (ctype && sfk == sfk_conversion)
7160 TYPE_HAS_CONVERSION (ctype) = 1;
7161 if (ctype && (sfk == sfk_constructor
7162 || sfk == sfk_destructor))
7164 /* We are within a class's scope. If our declarator name
7165 is the same as the class name, and we are defining
7166 a function, then it is a constructor/destructor, and
7167 therefore returns a void type. */
7169 if (flags == DTOR_FLAG)
7171 /* ISO C++ 12.4/2. A destructor may not be
7172 declared const or volatile. A destructor may
7175 error ("destructor cannot be static member function");
7178 error ("destructors may not be cv-qualified");
7179 quals = TYPE_UNQUALIFIED;
7181 if (decl_context == FIELD)
7183 if (! member_function_or_else (ctype,
7186 return void_type_node;
7189 else /* It's a constructor. */
7193 /* ISO C++ 12.1. A constructor may not be
7194 declared const or volatile. A constructor may
7195 not be virtual. A constructor may not be
7198 error ("constructor cannot be static member function");
7201 pedwarn ("constructors cannot be declared virtual");
7206 error ("constructors may not be cv-qualified");
7207 quals = TYPE_UNQUALIFIED;
7209 if (decl_context == FIELD)
7211 if (! member_function_or_else (ctype,
7214 return void_type_node;
7215 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
7216 if (sfk != sfk_constructor)
7220 if (decl_context == FIELD)
7226 error ("can't initialize friend function `%s'", name);
7229 /* Cannot be both friend and virtual. */
7230 error ("virtual functions cannot be friends");
7233 if (decl_context == NORMAL)
7234 error ("friend declaration not in class definition");
7235 if (current_function_decl && funcdef_flag)
7236 error ("can't define friend function `%s' in a local class definition",
7240 arg_types = grokparms (declarator->u.function.parameters,
7243 if (inner_declarator
7244 && inner_declarator->kind == cdk_id
7245 && inner_declarator->u.id.sfk == sfk_destructor
7246 && arg_types != void_list_node)
7248 error ("destructors may not have parameters");
7249 arg_types = void_list_node;
7253 type = build_function_type (type, arg_types);
7260 /* Filter out pointers-to-references and references-to-references.
7261 We can get these if a TYPE_DECL is used. */
7263 if (TREE_CODE (type) == REFERENCE_TYPE)
7265 error (declarator->kind == cdk_reference
7266 ? "cannot declare reference to `%#T'"
7267 : "cannot declare pointer to `%#T'", type);
7268 type = TREE_TYPE (type);
7270 else if (VOID_TYPE_P (type))
7272 if (declarator->kind == cdk_reference)
7273 error ("cannot declare reference to `%#T'", type);
7274 else if (declarator->kind == cdk_ptrmem)
7275 error ("cannot declare pointer to `%#T' member", type);
7278 /* We now know that the TYPE_QUALS don't apply to the decl,
7279 but to the target of the pointer. */
7280 type_quals = TYPE_UNQUALIFIED;
7282 if (declarator->kind == cdk_ptrmem
7283 && (TREE_CODE (type) == FUNCTION_TYPE
7284 || (quals && TREE_CODE (type) == METHOD_TYPE)))
7286 tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
7287 grok_method_quals (declarator->u.pointer.class_type,
7289 type = TREE_TYPE (dummy);
7290 quals = TYPE_UNQUALIFIED;
7293 if (declarator->kind == cdk_reference)
7295 if (!VOID_TYPE_P (type))
7296 type = build_reference_type (type);
7298 else if (TREE_CODE (type) == METHOD_TYPE)
7299 type = build_ptrmemfunc_type (build_pointer_type (type));
7300 else if (declarator->kind == cdk_ptrmem)
7301 type = build_ptrmem_type (declarator->u.pointer.class_type,
7304 type = build_pointer_type (type);
7306 /* Process a list of type modifier keywords (such as
7307 const or volatile) that were given inside the `*' or `&'. */
7309 if (declarator->u.pointer.qualifiers)
7312 = cp_build_qualified_type (type,
7313 declarator->u.pointer.qualifiers);
7314 type_quals = cp_type_quals (type);
7327 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7328 && TREE_CODE (type) != FUNCTION_TYPE
7329 && TREE_CODE (type) != METHOD_TYPE)
7331 error ("template-id `%D' used as a declarator",
7333 unqualified_id = dname;
7336 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7337 otherwise, we would not have exited the loop above. */
7339 && TREE_CODE (declarator->u.id.name) == SCOPE_REF
7340 /* If the qualifying scope was invalid, it will have been set to
7342 && TREE_OPERAND (declarator->u.id.name, 0)
7343 && TYPE_P (TREE_OPERAND (declarator->u.id.name, 0)))
7347 ctype = TREE_OPERAND (declarator->u.id.name, 0);
7349 ctype = TYPE_MAIN_VARIANT (ctype);
7351 while (t != NULL_TREE && CLASS_TYPE_P (t))
7353 /* You're supposed to have one `template <...>' for every
7354 template class, but you don't need one for a full
7355 specialization. For example:
7357 template <class T> struct S{};
7358 template <> struct S<int> { void f(); };
7359 void S<int>::f () {}
7361 is correct; there shouldn't be a `template <>' for the
7362 definition of `S<int>::f'. */
7363 if (CLASSTYPE_TEMPLATE_INFO (t)
7364 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t)
7365 || uses_template_parms (CLASSTYPE_TI_ARGS (t)))
7366 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7367 template_count += 1;
7369 t = TYPE_MAIN_DECL (t);
7370 t = DECL_CONTEXT (t);
7373 if (ctype == current_class_type)
7379 Is this ill-formed? */
7382 pedwarn ("extra qualification `%T::' on member `%s' ignored",
7385 else if (TREE_CODE (type) == FUNCTION_TYPE)
7387 tree sname = TREE_OPERAND (declarator->u.id.name, 1);
7389 if (TREE_CODE (sname) == IDENTIFIER_NODE
7390 && NEW_DELETE_OPNAME_P (sname))
7391 /* Overloaded operator new and operator delete
7392 are always static functions. */
7394 else if (current_class_type == NULL_TREE || friendp)
7396 = build_method_type_directly (ctype,
7398 TYPE_ARG_TYPES (type));
7401 error ("cannot declare member function `%T::%s' within `%T'",
7402 ctype, name, current_class_type);
7403 return error_mark_node;
7406 else if (declspecs->specs[(int)ds_typedef]
7407 || COMPLETE_TYPE_P (complete_type (ctype)))
7409 /* Have to move this code elsewhere in this function.
7410 this code is used for i.e., typedef int A::M; M *pm;
7412 It is? How? jason 10/2/94 */
7414 if (current_class_type)
7416 error ("cannot declare member `%T::%s' within `%T'",
7417 ctype, name, current_class_type);
7418 return void_type_node;
7423 cxx_incomplete_type_error (NULL_TREE, ctype);
7424 return error_mark_node;
7431 *attrlist = chainon (returned_attrs, *attrlist);
7433 attrlist = &returned_attrs;
7436 /* Now TYPE has the actual type. */
7438 /* Did array size calculations overflow? */
7440 if (TREE_CODE (type) == ARRAY_TYPE
7441 && COMPLETE_TYPE_P (type)
7442 && TREE_OVERFLOW (TYPE_SIZE (type)))
7444 error ("size of array `%s' is too large", name);
7445 /* If we proceed with the array type as it is, we'll eventually
7446 crash in tree_low_cst(). */
7447 type = error_mark_node;
7450 if ((decl_context == FIELD || decl_context == PARM)
7451 && !processing_template_decl
7452 && variably_modified_type_p (type, NULL_TREE))
7454 if (decl_context == FIELD)
7455 error ("data member may not have variably modified type `%T'", type);
7457 error ("parameter may not have variably modified type `%T'", type);
7458 type = error_mark_node;
7461 if (explicitp == 1 || (explicitp && friendp))
7463 /* [dcl.fct.spec] The explicit specifier shall only be used in
7464 declarations of constructors within a class definition. */
7465 error ("only declarations of constructors can be `explicit'");
7469 if (storage_class == sc_mutable)
7471 if (decl_context != FIELD || friendp)
7473 error ("non-member `%s' cannot be declared `mutable'", name);
7474 storage_class = sc_none;
7476 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7478 error ("non-object member `%s' cannot be declared `mutable'", name);
7479 storage_class = sc_none;
7481 else if (TREE_CODE (type) == FUNCTION_TYPE
7482 || TREE_CODE (type) == METHOD_TYPE)
7484 error ("function `%s' cannot be declared `mutable'", name);
7485 storage_class = sc_none;
7489 error ("static `%s' cannot be declared `mutable'", name);
7490 storage_class = sc_none;
7492 else if (type_quals & TYPE_QUAL_CONST)
7494 error ("const `%s' cannot be declared `mutable'", name);
7495 storage_class = sc_none;
7499 /* If this is declaring a typedef name, return a TYPE_DECL. */
7500 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7504 /* Note that the grammar rejects storage classes
7505 in typenames, fields or parameters. */
7506 if (current_lang_name == lang_name_java)
7507 TYPE_FOR_JAVA (type) = 1;
7509 if (decl_context == FIELD)
7511 if (constructor_name_p (unqualified_id, current_class_type))
7512 pedwarn ("ISO C++ forbids nested type `%D' with same name as enclosing class",
7514 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7518 decl = build_decl (TYPE_DECL, unqualified_id, type);
7519 if (in_namespace || ctype)
7520 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7521 if (!current_function_decl)
7522 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7525 /* If the user declares "typedef struct {...} foo" then the
7526 struct will have an anonymous name. Fill that name in now.
7527 Nothing can refer to it, so nothing needs know about the name
7529 if (type != error_mark_node
7532 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7533 && TYPE_ANONYMOUS_P (type)
7534 /* Don't do this if there are attributes. */
7535 && (!attrlist || !*attrlist)
7536 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7538 tree oldname = TYPE_NAME (type);
7541 /* Replace the anonymous name with the real name everywhere. */
7542 lookup_tag_reverse (type, unqualified_id);
7543 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7544 if (TYPE_NAME (t) == oldname)
7545 TYPE_NAME (t) = decl;
7547 if (TYPE_LANG_SPECIFIC (type))
7548 TYPE_WAS_ANONYMOUS (type) = 1;
7550 /* If this is a typedef within a template class, the nested
7551 type is a (non-primary) template. The name for the
7552 template needs updating as well. */
7553 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7554 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7555 = TYPE_IDENTIFIER (type);
7557 /* FIXME remangle member functions; member functions of a
7558 type with external linkage have external linkage. */
7563 if (ctype == NULL_TREE)
7565 if (TREE_CODE (type) != METHOD_TYPE)
7566 error ("%Jinvalid type qualifier for non-member function type",
7569 ctype = TYPE_METHOD_BASETYPE (type);
7571 if (ctype != NULL_TREE)
7572 grok_method_quals (ctype, decl, quals);
7576 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7577 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7579 bad_specifiers (decl, "type", virtualp, quals != TYPE_UNQUALIFIED,
7580 inlinep, friendp, raises != NULL_TREE);
7585 /* Detect the case of an array type of unspecified size
7586 which came, as such, direct from a typedef name.
7587 We must copy the type, so that the array's domain can be
7588 individually set by the object's initializer. */
7590 if (type && typedef_type
7591 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7592 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7593 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7595 /* Detect where we're using a typedef of function type to declare a
7596 function. PARMS will not be set, so we must create it now. */
7598 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
7600 tree decls = NULL_TREE;
7603 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
7605 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
7607 TREE_CHAIN (decl) = decls;
7611 parms = nreverse (decls);
7614 /* If this is a type name (such as, in a cast or sizeof),
7615 compute the type and return it now. */
7617 if (decl_context == TYPENAME)
7619 /* Note that the grammar rejects storage classes
7620 in typenames, fields or parameters. */
7621 if (type_quals != TYPE_UNQUALIFIED)
7622 type_quals = TYPE_UNQUALIFIED;
7624 /* Special case: "friend class foo" looks like a TYPENAME context. */
7627 if (type_quals != TYPE_UNQUALIFIED)
7629 error ("type qualifiers specified for friend class declaration");
7630 type_quals = TYPE_UNQUALIFIED;
7634 error ("`inline' specified for friend class declaration");
7640 /* Don't allow friend declaration without a class-key. */
7641 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
7642 pedwarn ("template parameters cannot be friends");
7643 else if (TREE_CODE (type) == TYPENAME_TYPE)
7644 pedwarn ("friend declaration requires class-key, "
7645 "i.e. `friend class %T::%D'",
7646 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
7648 pedwarn ("friend declaration requires class-key, "
7649 "i.e. `friend %#T'",
7653 /* Only try to do this stuff if we didn't already give up. */
7654 if (type != integer_type_node)
7656 /* A friendly class? */
7657 if (current_class_type)
7658 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
7661 error ("trying to make class `%T' a friend of global scope",
7664 type = void_type_node;
7669 if (ctype == NULL_TREE)
7671 if (TREE_CODE (type) != METHOD_TYPE)
7672 error ("invalid qualifiers on non-member function type");
7674 ctype = TYPE_METHOD_BASETYPE (type);
7678 tree dummy = build_decl (TYPE_DECL, unqualified_id, type);
7679 grok_method_quals (ctype, dummy, quals);
7680 type = TREE_TYPE (dummy);
7686 else if (unqualified_id == NULL_TREE && decl_context != PARM
7687 && decl_context != CATCHPARM
7688 && TREE_CODE (type) != UNION_TYPE
7691 error ("abstract declarator `%T' used as declaration", type);
7692 unqualified_id = make_anon_name ();
7695 /* `void' at top level (not within pointer)
7696 is allowed only in typedefs or type names.
7697 We don't complain about parms either, but that is because
7698 a better error message can be made later. */
7700 if (TREE_CODE (type) == VOID_TYPE && decl_context != PARM)
7702 if (! unqualified_id)
7703 error ("unnamed variable or field declared void");
7704 else if (TREE_CODE (unqualified_id) == IDENTIFIER_NODE)
7706 gcc_assert (!IDENTIFIER_OPNAME_P (unqualified_id));
7707 error ("variable or field `%s' declared void", name);
7710 error ("variable or field declared void");
7711 type = integer_type_node;
7714 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7715 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7717 if (decl_context == PARM || decl_context == CATCHPARM)
7719 if (ctype || in_namespace)
7720 error ("cannot use `::' in parameter declaration");
7722 /* A parameter declared as an array of T is really a pointer to T.
7723 One declared as a function is really a pointer to a function.
7724 One declared as a member is really a pointer to member. */
7726 if (TREE_CODE (type) == ARRAY_TYPE)
7728 /* Transfer const-ness of array into that of type pointed to. */
7729 type = build_pointer_type (TREE_TYPE (type));
7730 type_quals = TYPE_UNQUALIFIED;
7732 else if (TREE_CODE (type) == FUNCTION_TYPE)
7733 type = build_pointer_type (type);
7739 if (decl_context == PARM)
7741 decl = cp_build_parm_decl (unqualified_id, type);
7743 bad_specifiers (decl, "parameter", virtualp, quals != TYPE_UNQUALIFIED,
7744 inlinep, friendp, raises != NULL_TREE);
7746 else if (decl_context == FIELD)
7748 /* The C99 flexible array extension. */
7749 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
7750 && TYPE_DOMAIN (type) == NULL_TREE)
7752 tree itype = compute_array_index_type (dname, integer_zero_node);
7753 type = build_cplus_array_type (TREE_TYPE (type), itype);
7756 if (type == error_mark_node)
7758 /* Happens when declaring arrays of sizes which
7759 are error_mark_node, for example. */
7762 else if (in_namespace && !friendp)
7764 /* Something like struct S { int N::j; }; */
7765 error ("invalid use of `::'");
7768 else if (TREE_CODE (type) == FUNCTION_TYPE)
7771 tree function_context;
7773 /* We catch the others as conflicts with the builtin
7775 if (friendp && unqualified_id == ridpointers[(int) RID_SIGNED])
7777 error ("function `%D' cannot be declared friend",
7784 if (ctype == NULL_TREE)
7785 ctype = current_class_type;
7787 if (ctype == NULL_TREE)
7789 error ("can't make `%D' into a method -- not in a class",
7791 return void_type_node;
7794 /* ``A union may [ ... ] not [ have ] virtual functions.''
7796 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
7798 error ("function `%D' declared virtual inside a union",
7800 return void_type_node;
7803 if (NEW_DELETE_OPNAME_P (unqualified_id))
7807 error ("`%D' cannot be declared virtual, since it is always static",
7812 else if (staticp < 2)
7813 type = build_method_type_directly (ctype,
7815 TYPE_ARG_TYPES (type));
7818 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7819 function_context = (ctype != NULL_TREE) ?
7820 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
7821 publicp = (! friendp || ! staticp)
7822 && function_context == NULL_TREE;
7823 decl = grokfndecl (ctype, type,
7824 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7825 ? unqualified_id : dname,
7828 virtualp, flags, quals, raises,
7829 friendp ? -1 : 0, friendp, publicp, inlinep,
7830 funcdef_flag, template_count, in_namespace);
7831 if (decl == NULL_TREE)
7834 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7835 /* The decl and setting of decl_attr is also turned off. */
7836 decl = build_decl_attribute_variant (decl, decl_attr);
7839 /* [class.conv.ctor]
7841 A constructor declared without the function-specifier
7842 explicit that can be called with a single parameter
7843 specifies a conversion from the type of its first
7844 parameter to the type of its class. Such a constructor
7845 is called a converting constructor. */
7847 DECL_NONCONVERTING_P (decl) = 1;
7848 else if (DECL_CONSTRUCTOR_P (decl))
7850 /* The constructor can be called with exactly one
7851 parameter if there is at least one parameter, and
7852 any subsequent parameters have default arguments.
7853 Ignore any compiler-added parms. */
7854 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
7856 if (arg_types == void_list_node
7858 && TREE_CHAIN (arg_types)
7859 && TREE_CHAIN (arg_types) != void_list_node
7860 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
7861 DECL_NONCONVERTING_P (decl) = 1;
7864 else if (TREE_CODE (type) == METHOD_TYPE)
7866 /* We only get here for friend declarations of
7867 members of other classes. */
7868 /* All method decls are public, so tell grokfndecl to set
7869 TREE_PUBLIC, also. */
7870 decl = grokfndecl (ctype, type,
7871 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7872 ? unqualified_id : dname,
7875 virtualp, flags, quals, raises,
7876 friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
7877 template_count, in_namespace);
7878 if (decl == NULL_TREE)
7881 else if (!staticp && !dependent_type_p (type)
7882 && !COMPLETE_TYPE_P (complete_type (type))
7883 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
7886 error ("field `%D' has incomplete type", unqualified_id);
7888 error ("name `%T' has incomplete type", type);
7890 /* If we're instantiating a template, tell them which
7891 instantiation made the field's type be incomplete. */
7892 if (current_class_type
7893 && TYPE_NAME (current_class_type)
7894 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
7896 && declspecs->type == type)
7897 error (" in instantiation of template `%T'",
7898 current_class_type);
7900 type = error_mark_node;
7907 error ("`%E' is neither function nor member function; "
7908 "cannot be declared friend", unqualified_id);
7916 /* Friends are treated specially. */
7917 if (ctype == current_class_type)
7918 warning ("member functions are implicitly friends of their class");
7919 else if (decl && DECL_NAME (decl))
7921 if (template_class_depth (current_class_type) == 0)
7923 decl = check_explicit_specialization
7924 (unqualified_id, decl, template_count,
7925 2 * (funcdef_flag != 0) + 4);
7926 if (decl == error_mark_node)
7927 return error_mark_node;
7930 decl = do_friend (ctype, unqualified_id, decl,
7931 *attrlist, flags, quals, funcdef_flag);
7935 return void_type_node;
7938 /* Structure field. It may not be a function, except for C++. */
7940 if (decl == NULL_TREE)
7946 /* An attempt is being made to initialize a non-static
7947 member. But, from [class.mem]:
7949 4 A member-declarator can contain a
7950 constant-initializer only if it declares a static
7951 member (_class.static_) of integral or enumeration
7952 type, see _class.static.data_.
7954 This used to be relatively common practice, but
7955 the rest of the compiler does not correctly
7956 handle the initialization unless the member is
7957 static so we make it static below. */
7958 pedwarn ("ISO C++ forbids initialization of member `%D'",
7960 pedwarn ("making `%D' static", unqualified_id);
7964 if (uses_template_parms (type))
7965 /* We'll check at instantiation time. */
7967 else if (check_static_variable_definition (unqualified_id,
7969 /* If we just return the declaration, crashes
7970 will sometimes occur. We therefore return
7971 void_type_node, as if this was a friend
7972 declaration, to cause callers to completely
7973 ignore this declaration. */
7974 return void_type_node;
7979 /* C++ allows static class members. All other work
7980 for this is done by grokfield. */
7981 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
7982 set_linkage_for_static_data_member (decl);
7983 /* Even if there is an in-class initialization, DECL
7984 is considered undefined until an out-of-class
7985 definition is provided. */
7986 DECL_EXTERNAL (decl) = 1;
7990 decl = build_decl (FIELD_DECL, unqualified_id, type);
7991 DECL_NONADDRESSABLE_P (decl) = bitfield;
7992 if (storage_class == sc_mutable)
7994 DECL_MUTABLE_P (decl) = 1;
7995 storage_class = sc_none;
7999 bad_specifiers (decl, "field", virtualp, quals != TYPE_UNQUALIFIED,
8000 inlinep, friendp, raises != NULL_TREE);
8003 else if (TREE_CODE (type) == FUNCTION_TYPE
8004 || TREE_CODE (type) == METHOD_TYPE)
8009 if (!unqualified_id)
8012 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8013 original_name = dname;
8015 original_name = unqualified_id;
8017 if (storage_class == sc_auto)
8018 error ("storage class `auto' invalid for function `%s'", name);
8019 else if (storage_class == sc_register)
8020 error ("storage class `register' invalid for function `%s'", name);
8022 error ("storage class `__thread' invalid for function `%s'", name);
8024 /* Function declaration not at top level.
8025 Storage classes other than `extern' are not allowed
8026 and `extern' makes no difference. */
8027 if (! toplevel_bindings_p ()
8028 && (storage_class == sc_static
8029 || declspecs->specs[(int)ds_inline])
8032 if (storage_class == sc_static)
8033 pedwarn ("`static' specified invalid for function `%s' declared out of global scope", name);
8035 pedwarn ("`inline' specifier invalid for function `%s' declared out of global scope", name);
8038 if (ctype == NULL_TREE)
8042 error ("virtual non-class function `%s'", name);
8046 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8047 && !NEW_DELETE_OPNAME_P (original_name))
8048 type = build_method_type_directly (ctype,
8050 TYPE_ARG_TYPES (type));
8052 /* Record presence of `static'. */
8053 publicp = (ctype != NULL_TREE
8054 || storage_class == sc_extern
8055 || storage_class != sc_static);
8057 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8058 virtualp, flags, quals, raises,
8060 publicp, inlinep, funcdef_flag,
8061 template_count, in_namespace);
8062 if (decl == NULL_TREE)
8067 int invalid_static = 0;
8069 /* Don't allow a static member function in a class, and forbid
8070 declaring main to be static. */
8071 if (TREE_CODE (type) == METHOD_TYPE)
8073 pedwarn ("cannot declare member function `%D' to have static linkage", decl);
8076 else if (current_function_decl)
8078 /* FIXME need arm citation */
8079 error ("cannot declare static function inside another function");
8086 storage_class = sc_none;
8092 /* It's a variable. */
8094 /* An uninitialized decl with `extern' is a reference. */
8095 decl = grokvardecl (type, unqualified_id,
8098 (type_quals & TYPE_QUAL_CONST) != 0,
8099 ctype ? ctype : in_namespace);
8100 bad_specifiers (decl, "variable", virtualp, quals != TYPE_UNQUALIFIED,
8101 inlinep, friendp, raises != NULL_TREE);
8105 DECL_CONTEXT (decl) = ctype;
8108 pedwarn ("`static' may not be used when defining (as opposed to declaring) a static data member");
8110 storage_class = sc_none;
8112 if (storage_class == sc_register && TREE_STATIC (decl))
8114 error ("static member `%D' declared `register'", decl);
8115 storage_class = sc_none;
8117 if (storage_class == sc_extern && pedantic)
8119 pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
8121 storage_class = sc_none;
8126 /* Record `register' declaration for warnings on &
8127 and in case doing stupid register allocation. */
8129 if (storage_class == sc_register)
8130 DECL_REGISTER (decl) = 1;
8131 else if (storage_class == sc_extern)
8132 DECL_THIS_EXTERN (decl) = 1;
8133 else if (storage_class == sc_static)
8134 DECL_THIS_STATIC (decl) = 1;
8136 /* Record constancy and volatility. There's no need to do this
8137 when processing a template; we'll do this for the instantiated
8138 declaration based on the type of DECL. */
8139 if (!processing_template_decl)
8140 c_apply_type_quals_to_decl (type_quals, decl);
8146 /* Subroutine of start_function. Ensure that each of the parameter
8147 types (as listed in PARMS) is complete, as is required for a
8148 function definition. */
8151 require_complete_types_for_parms (tree parms)
8153 for (; parms; parms = TREE_CHAIN (parms))
8155 if (VOID_TYPE_P (TREE_TYPE (parms)))
8156 /* grokparms will have already issued an error. */
8157 TREE_TYPE (parms) = error_mark_node;
8158 else if (complete_type_or_else (TREE_TYPE (parms), parms))
8160 layout_decl (parms, 0);
8161 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8166 /* Returns nonzero if T is a local variable. */
8169 local_variable_p (tree t)
8171 if ((TREE_CODE (t) == VAR_DECL
8172 /* A VAR_DECL with a context that is a _TYPE is a static data
8174 && !TYPE_P (CP_DECL_CONTEXT (t))
8175 /* Any other non-local variable must be at namespace scope. */
8176 && !DECL_NAMESPACE_SCOPE_P (t))
8177 || (TREE_CODE (t) == PARM_DECL))
8183 /* Returns nonzero if T is an automatic local variable or a label.
8184 (These are the declarations that need to be remapped when the code
8185 containing them is duplicated.) */
8188 nonstatic_local_decl_p (tree t)
8190 return ((local_variable_p (t) && !TREE_STATIC (t))
8191 || TREE_CODE (t) == LABEL_DECL
8192 || TREE_CODE (t) == RESULT_DECL);
8195 /* Like local_variable_p, but suitable for use as a tree-walking
8199 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8200 void *data ATTRIBUTE_UNUSED)
8202 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8204 else if (TYPE_P (*tp))
8211 /* Check that ARG, which is a default-argument expression for a
8212 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8213 something goes wrong. DECL may also be a _TYPE node, rather than a
8214 DECL, if there is no DECL available. */
8217 check_default_argument (tree decl, tree arg)
8222 if (TREE_CODE (arg) == DEFAULT_ARG)
8223 /* We get a DEFAULT_ARG when looking at an in-class declaration
8224 with a default argument. Ignore the argument for now; we'll
8225 deal with it after the class is complete. */
8228 if (processing_template_decl || uses_template_parms (arg))
8229 /* We don't do anything checking until instantiation-time. Note
8230 that there may be uninstantiated arguments even for an
8231 instantiated function, since default arguments are not
8232 instantiated until they are needed. */
8241 decl_type = TREE_TYPE (decl);
8243 if (arg == error_mark_node
8244 || decl == error_mark_node
8245 || TREE_TYPE (arg) == error_mark_node
8246 || decl_type == error_mark_node)
8247 /* Something already went wrong. There's no need to check
8249 return error_mark_node;
8251 /* [dcl.fct.default]
8253 A default argument expression is implicitly converted to the
8255 if (!TREE_TYPE (arg)
8256 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
8259 error ("default argument for `%#D' has type `%T'",
8260 decl, TREE_TYPE (arg));
8262 error ("default argument for parameter of type `%T' has type `%T'",
8263 decl_type, TREE_TYPE (arg));
8265 return error_mark_node;
8268 /* [dcl.fct.default]
8270 Local variables shall not be used in default argument
8273 The keyword `this' shall not be used in a default argument of a
8275 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8279 error ("default argument `%E' uses local variable `%D'",
8281 return error_mark_node;
8288 /* Decode the list of parameter types for a function type.
8289 Given the list of things declared inside the parens,
8290 return a list of types.
8292 If this parameter does not end with an ellipsis, we append
8295 *PARMS is set to the chain of PARM_DECLs created. */
8298 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8300 tree result = NULL_TREE;
8301 tree decls = NULL_TREE;
8302 int ellipsis = !first_parm || first_parm->ellipsis_p;
8303 cp_parameter_declarator *parm;
8306 for (parm = first_parm; parm != NULL; parm = parm->next)
8308 tree type = NULL_TREE;
8309 tree init = parm->default_argument;
8313 if (parm == no_parameters)
8316 attrs = parm->decl_specifiers.attributes;
8317 parm->decl_specifiers.attributes = NULL_TREE;
8318 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8319 PARM, init != NULL_TREE, &attrs);
8320 if (! decl || TREE_TYPE (decl) == error_mark_node)
8324 cplus_decl_attributes (&decl, attrs, 0);
8326 type = TREE_TYPE (decl);
8327 if (VOID_TYPE_P (type))
8329 if (same_type_p (type, void_type_node)
8330 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8331 /* this is a parmlist of `(void)', which is ok. */
8333 cxx_incomplete_type_error (decl, type);
8334 /* It's not a good idea to actually create parameters of
8335 type `void'; other parts of the compiler assume that a
8336 void type terminates the parameter list. */
8337 type = error_mark_node;
8338 TREE_TYPE (decl) = error_mark_node;
8341 if (type != error_mark_node)
8343 /* Top-level qualifiers on the parameters are
8344 ignored for function types. */
8345 type = cp_build_qualified_type (type, 0);
8346 if (TREE_CODE (type) == METHOD_TYPE)
8348 error ("parameter `%D' invalidly declared method type", decl);
8349 type = build_pointer_type (type);
8350 TREE_TYPE (decl) = type;
8352 else if (abstract_virtuals_error (decl, type))
8353 any_error = 1; /* Seems like a good idea. */
8354 else if (POINTER_TYPE_P (type))
8356 /* [dcl.fct]/6, parameter types cannot contain pointers
8357 (references) to arrays of unknown bound. */
8358 tree t = TREE_TYPE (type);
8359 int ptr = TYPE_PTR_P (type);
8365 else if (TREE_CODE (t) != ARRAY_TYPE)
8367 else if (!TYPE_DOMAIN (t))
8371 if (TREE_CODE (t) == ARRAY_TYPE)
8372 error ("parameter `%D' includes %s to array of unknown bound `%T'",
8373 decl, ptr ? "pointer" : "reference", t);
8376 if (!any_error && init)
8377 init = check_default_argument (decl, init);
8382 TREE_CHAIN (decl) = decls;
8384 result = tree_cons (init, type, result);
8386 decls = nreverse (decls);
8387 result = nreverse (result);
8389 result = chainon (result, void_list_node);
8396 /* D is a constructor or overloaded `operator='.
8398 Let T be the class in which D is declared. Then, this function
8401 -1 if D's is an ill-formed constructor or copy assignment operator
8402 whose first parameter is of type `T'.
8403 0 if D is not a copy constructor or copy assignment
8405 1 if D is a copy constructor or copy assignment operator whose
8406 first parameter is a reference to const qualified T.
8407 2 if D is a copy constructor or copy assignment operator whose
8408 first parameter is a reference to non-const qualified T.
8410 This function can be used as a predicate. Positive values indicate
8411 a copy constructor and nonzero values indicate a copy assignment
8421 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8423 if (DECL_TEMPLATE_INFO (d) && is_member_template (DECL_TI_TEMPLATE (d)))
8424 /* Instantiations of template member functions are never copy
8425 functions. Note that member functions of templated classes are
8426 represented as template functions internally, and we must
8427 accept those as copy functions. */
8430 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8434 arg_type = TREE_VALUE (args);
8436 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8438 /* Pass by value copy assignment operator. */
8441 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8442 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8444 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8450 args = TREE_CHAIN (args);
8452 if (args && args != void_list_node && !TREE_PURPOSE (args))
8453 /* There are more non-optional args. */
8459 /* Remember any special properties of member function DECL. */
8461 void grok_special_member_properties (tree decl)
8463 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl))
8464 ; /* Not special. */
8465 else if (DECL_CONSTRUCTOR_P (decl))
8467 int ctor = copy_fn_p (decl);
8473 A non-template constructor for class X is a copy
8474 constructor if its first parameter is of type X&, const
8475 X&, volatile X& or const volatile X&, and either there
8476 are no other parameters or else all other parameters have
8477 default arguments. */
8478 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl)) = 1;
8480 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl)) = 1;
8482 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8483 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl)) = 1;
8485 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8489 A non-template assignment operator for class X is a copy
8490 assignment operator if its parameter is of type X, X&, const
8491 X&, volatile X& or const volatile X&. */
8493 int assop = copy_fn_p (decl);
8497 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8499 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8504 /* Check a constructor DECL has the correct form. Complains
8505 if the class has a constructor of the form X(X). */
8508 grok_ctor_properties (tree ctype, tree decl)
8510 int ctor_parm = copy_fn_p (decl);
8516 A declaration of a constructor for a class X is ill-formed if
8517 its first parameter is of type (optionally cv-qualified) X
8518 and either there are no other parameters or else all other
8519 parameters have default arguments.
8521 We *don't* complain about member template instantiations that
8522 have this form, though; they can occur as we try to decide
8523 what constructor to use during overload resolution. Since
8524 overload resolution will never prefer such a constructor to
8525 the non-template copy constructor (which is either explicitly
8526 or implicitly defined), there's no need to worry about their
8527 existence. Theoretically, they should never even be
8528 instantiated, but that's hard to forestall. */
8529 error ("invalid constructor; you probably meant `%T (const %T&)'",
8537 /* An operator with this code is unary, but can also be binary. */
8540 ambi_op_p (enum tree_code code)
8542 return (code == INDIRECT_REF
8543 || code == ADDR_EXPR
8544 || code == CONVERT_EXPR
8545 || code == NEGATE_EXPR
8546 || code == PREINCREMENT_EXPR
8547 || code == PREDECREMENT_EXPR);
8550 /* An operator with this name can only be unary. */
8553 unary_op_p (enum tree_code code)
8555 return (code == TRUTH_NOT_EXPR
8556 || code == BIT_NOT_EXPR
8557 || code == COMPONENT_REF
8558 || code == TYPE_EXPR);
8561 /* DECL is a declaration for an overloaded operator. Returns true if
8562 the declaration is valid; false otherwise. If COMPLAIN is true,
8563 errors are issued for invalid declarations. */
8566 grok_op_properties (tree decl, int friendp, bool complain)
8568 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
8570 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
8571 tree name = DECL_NAME (decl);
8572 enum tree_code operator_code;
8576 /* Assume that the declaration is valid. */
8579 /* Count the number of arguments. */
8580 for (argtype = argtypes, arity = 0;
8581 argtype && argtype != void_list_node;
8582 argtype = TREE_CHAIN (argtype))
8585 if (current_class_type == NULL_TREE)
8588 if (DECL_CONV_FN_P (decl))
8589 operator_code = TYPE_EXPR;
8593 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8594 if (ansi_opname (CODE) == name) \
8596 operator_code = (CODE); \
8599 else if (ansi_assopname (CODE) == name) \
8601 operator_code = (CODE); \
8602 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8606 #include "operators.def"
8612 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
8613 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8617 switch (operator_code)
8620 TYPE_HAS_NEW_OPERATOR (current_class_type) = 1;
8624 TYPE_GETS_DELETE (current_class_type) |= 1;
8628 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type) = 1;
8631 case VEC_DELETE_EXPR:
8632 TYPE_GETS_DELETE (current_class_type) |= 2;
8640 /* [basic.std.dynamic.allocation]/1:
8642 A program is ill-formed if an allocation function is declared
8643 in a namespace scope other than global scope or declared static
8646 The same also holds true for deallocation functions. */
8647 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
8648 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8650 if (DECL_NAMESPACE_SCOPE_P (decl))
8652 if (CP_DECL_CONTEXT (decl) != global_namespace)
8653 error ("`%D' may not be declared within a namespace", decl);
8654 else if (!TREE_PUBLIC (decl))
8655 error ("`%D' may not be declared as static", decl);
8659 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
8660 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
8661 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8662 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
8665 /* An operator function must either be a non-static member function
8666 or have at least one parameter of a class, a reference to a class,
8667 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8668 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
8670 if (operator_code == TYPE_EXPR
8671 || operator_code == CALL_EXPR
8672 || operator_code == COMPONENT_REF
8673 || operator_code == ARRAY_REF
8674 || operator_code == NOP_EXPR)
8675 error ("`%D' must be a nonstatic member function", decl);
8680 if (DECL_STATIC_FUNCTION_P (decl))
8681 error ("`%D' must be either a non-static member function or a non-member function", decl);
8683 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
8685 tree arg = non_reference (TREE_VALUE (p));
8686 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8687 because these checks are performed even on
8688 template functions. */
8689 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
8693 if (!p || p == void_list_node)
8698 error ("`%D' must have an argument of class or "
8706 /* There are no restrictions on the arguments to an overloaded
8708 if (operator_code == CALL_EXPR)
8711 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
8713 tree t = TREE_TYPE (name);
8716 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
8717 const char *what = 0;
8720 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
8722 if (TREE_CODE (t) == VOID_TYPE)
8724 else if (t == current_class_type)
8725 what = "the same type";
8726 /* Don't force t to be complete here. */
8727 else if (IS_AGGR_TYPE (t)
8728 && COMPLETE_TYPE_P (t)
8729 && DERIVED_FROM_P (t, current_class_type))
8730 what = "a base class";
8732 if (what && warn_conversion)
8733 warning ("conversion to %s%s will never use a type conversion operator",
8734 ref ? "a reference to " : "", what);
8737 if (operator_code == COND_EXPR)
8740 error ("ISO C++ prohibits overloading operator ?:");
8742 else if (ambi_op_p (operator_code))
8745 /* We pick the one-argument operator codes by default, so
8746 we don't have to change anything. */
8748 else if (arity == 2)
8750 /* If we thought this was a unary operator, we now know
8751 it to be a binary operator. */
8752 switch (operator_code)
8755 operator_code = MULT_EXPR;
8759 operator_code = BIT_AND_EXPR;
8763 operator_code = PLUS_EXPR;
8767 operator_code = MINUS_EXPR;
8770 case PREINCREMENT_EXPR:
8771 operator_code = POSTINCREMENT_EXPR;
8774 case PREDECREMENT_EXPR:
8775 operator_code = POSTDECREMENT_EXPR;
8782 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8784 if ((operator_code == POSTINCREMENT_EXPR
8785 || operator_code == POSTDECREMENT_EXPR)
8786 && ! processing_template_decl
8787 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
8790 error ("postfix `%D' must take `int' as its argument",
8794 ("postfix `%D' must take `int' as its second argument",
8801 error ("`%D' must take either zero or one argument", decl);
8803 error ("`%D' must take either one or two arguments", decl);
8806 /* More Effective C++ rule 6. */
8808 && (operator_code == POSTINCREMENT_EXPR
8809 || operator_code == POSTDECREMENT_EXPR
8810 || operator_code == PREINCREMENT_EXPR
8811 || operator_code == PREDECREMENT_EXPR))
8813 tree arg = TREE_VALUE (argtypes);
8814 tree ret = TREE_TYPE (TREE_TYPE (decl));
8815 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
8816 arg = TREE_TYPE (arg);
8817 arg = TYPE_MAIN_VARIANT (arg);
8818 if (operator_code == PREINCREMENT_EXPR
8819 || operator_code == PREDECREMENT_EXPR)
8821 if (TREE_CODE (ret) != REFERENCE_TYPE
8822 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
8824 warning ("prefix `%D' should return `%T'", decl,
8825 build_reference_type (arg));
8829 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
8830 warning ("postfix `%D' should return `%T'", decl, arg);
8834 else if (unary_op_p (operator_code))
8839 error ("`%D' must take `void'", decl);
8841 error ("`%D' must take exactly one argument", decl);
8844 else /* if (binary_op_p (operator_code)) */
8849 error ("`%D' must take exactly one argument", decl);
8851 error ("`%D' must take exactly two arguments", decl);
8854 /* More Effective C++ rule 7. */
8856 && (operator_code == TRUTH_ANDIF_EXPR
8857 || operator_code == TRUTH_ORIF_EXPR
8858 || operator_code == COMPOUND_EXPR))
8859 warning ("user-defined `%D' always evaluates both arguments",
8863 /* Effective C++ rule 23. */
8866 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
8867 && (operator_code == PLUS_EXPR
8868 || operator_code == MINUS_EXPR
8869 || operator_code == TRUNC_DIV_EXPR
8870 || operator_code == MULT_EXPR
8871 || operator_code == TRUNC_MOD_EXPR)
8872 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
8873 warning ("`%D' should return by value", decl);
8876 for (; argtypes && argtypes != void_list_node;
8877 argtypes = TREE_CHAIN (argtypes))
8878 if (TREE_PURPOSE (argtypes))
8880 TREE_PURPOSE (argtypes) = NULL_TREE;
8881 if (operator_code == POSTINCREMENT_EXPR
8882 || operator_code == POSTDECREMENT_EXPR)
8885 pedwarn ("`%D' cannot have default arguments", decl);
8888 error ("`%D' cannot have default arguments", decl);
8897 tag_name (enum tag_types code)
8914 /* Name lookup in an elaborated-type-specifier (after the keyword
8915 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
8916 elaborated-type-specifier is invalid, issue a diagnostic and return
8917 error_mark_node; otherwise, return the *_TYPE to which it referred.
8918 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
8921 check_elaborated_type_specifier (enum tag_types tag_code,
8923 bool allow_template_p)
8929 struct S { struct S *p; };
8931 name lookup will find the TYPE_DECL for the implicit "S::S"
8932 typedef. Adjust for that here. */
8933 if (DECL_SELF_REFERENCE_P (decl))
8934 decl = TYPE_NAME (TREE_TYPE (decl));
8936 type = TREE_TYPE (decl);
8940 If the identifier resolves to a typedef-name or a template
8941 type-parameter, the elaborated-type-specifier is ill-formed.
8943 In other words, the only legitimate declaration to use in the
8944 elaborated type specifier is the implicit typedef created when
8945 the type is declared. */
8946 if (!DECL_IMPLICIT_TYPEDEF_P (decl))
8948 error ("using typedef-name `%D' after `%s'", decl, tag_name (tag_code));
8949 return IS_AGGR_TYPE (type) ? type : error_mark_node;
8952 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8954 error ("using template type parameter `%T' after `%s'",
8955 type, tag_name (tag_code));
8956 return error_mark_node;
8958 else if (TREE_CODE (type) != RECORD_TYPE
8959 && TREE_CODE (type) != UNION_TYPE
8960 && tag_code != enum_type)
8962 error ("`%T' referred to as `%s'", type, tag_name (tag_code));
8963 return error_mark_node;
8965 else if (TREE_CODE (type) != ENUMERAL_TYPE
8966 && tag_code == enum_type)
8968 error ("`%T' referred to as enum", type);
8969 return error_mark_node;
8971 else if (!allow_template_p
8972 && TREE_CODE (type) == RECORD_TYPE
8973 && CLASSTYPE_IS_TEMPLATE (type))
8975 /* If a class template appears as elaborated type specifier
8976 without a template header such as:
8978 template <class T> class C {};
8979 void f(class C); // No template header here
8981 then the required template argument is missing. */
8983 error ("template argument required for `%s %T'",
8984 tag_name (tag_code),
8985 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
8986 return error_mark_node;
8992 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
8993 Define the tag as a forward-reference if it is not defined.
8995 If a declaration is given, process it here, and report an error if
8996 multiple declarations are not identical.
8998 GLOBALIZE is false when this is also a definition. Only look in
8999 the current frame for the name (since C++ allows new names in any
9002 TEMPLATE_HEADER_P is true when this declaration is preceded by
9003 a set of template parameters. */
9006 xref_tag (enum tag_types tag_code, tree name,
9007 bool globalize, bool template_header_p)
9009 enum tree_code code;
9011 struct cp_binding_level *b = current_binding_level;
9012 tree context = NULL_TREE;
9014 timevar_push (TV_NAME_LOOKUP);
9016 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9028 code = ENUMERAL_TYPE;
9036 /* If we know we are defining this tag, only look it up in
9037 this scope and don't try to find it as a type. */
9038 t = lookup_tag (code, name, b, 1);
9042 tree decl = lookup_name (name, 2);
9044 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9045 decl = DECL_TEMPLATE_RESULT (decl);
9047 if (decl && TREE_CODE (decl) == TYPE_DECL)
9049 /* Two cases we need to consider when deciding if a class
9050 template is allowed as an elaborated type specifier:
9051 1. It is a self reference to its own class.
9052 2. It comes with a template header.
9056 template <class T> class C {
9057 class C *c1; // DECL_SELF_REFERENCE_P is true
9060 template <class U> class C; // template_header_p is true
9061 template <class T> class C<T>::D {
9062 class C *c2; // DECL_SELF_REFERENCE_P is true
9065 t = check_elaborated_type_specifier (tag_code,
9068 | DECL_SELF_REFERENCE_P (decl));
9069 if (t == error_mark_node)
9070 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9075 if (t && current_class_type
9076 && template_class_depth (current_class_type)
9077 && template_header_p)
9079 /* Since GLOBALIZE is nonzero, we are not looking at a
9080 definition of this tag. Since, in addition, we are currently
9081 processing a (member) template declaration of a template
9082 class, we must be very careful; consider:
9089 { template <class V>
9090 friend struct S1; };
9092 Here, the S2::S1 declaration should not be confused with the
9093 outer declaration. In particular, the inner version should
9094 have a template parameter of level 2, not level 1. This
9095 would be particularly important if the member declaration
9098 template <class V = U> friend struct S1;
9100 say, when we should tsubst into `U' when instantiating
9101 S2. On the other hand, when presented with:
9111 we must find the inner binding eventually. We
9112 accomplish this by making sure that the new type we
9113 create to represent this declaration has the right
9115 context = TYPE_CONTEXT (t);
9122 /* If no such tag is yet defined, create a forward-reference node
9123 and record it as the "definition".
9124 When a real declaration of this type is found,
9125 the forward-reference will be altered into a real type. */
9126 if (code == ENUMERAL_TYPE)
9128 error ("use of enum `%#D' without previous declaration", name);
9129 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9133 t = make_aggr_type (code);
9134 TYPE_CONTEXT (t) = context;
9135 pushtag (name, t, globalize);
9140 if (!globalize && processing_template_decl && IS_AGGR_TYPE (t))
9141 redeclare_class_template (t, current_template_parms);
9142 else if (!processing_template_decl
9144 && CLASSTYPE_IS_TEMPLATE (t))
9146 error ("redeclaration of `%T' as a non-template", t);
9147 t = error_mark_node;
9151 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9155 xref_tag_from_type (tree old, tree id, int globalize)
9157 enum tag_types tag_kind;
9159 if (TREE_CODE (old) == RECORD_TYPE)
9160 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9162 tag_kind = union_type;
9164 if (id == NULL_TREE)
9165 id = TYPE_IDENTIFIER (old);
9167 return xref_tag (tag_kind, id, globalize, false);
9170 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9171 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9172 access_* node, and the TREE_VALUE is the type of the base-class.
9173 Non-NULL TREE_TYPE indicates virtual inheritance. */
9176 xref_basetypes (tree ref, tree base_list)
9179 tree binfo, base_binfo;
9180 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9181 unsigned max_bases = 0; /* Maximum direct bases. */
9183 tree default_access;
9184 tree igo_prev; /* Track Inheritance Graph Order. */
9186 if (ref == error_mark_node)
9189 /* The base of a derived class is private by default, all others are
9191 default_access = (TREE_CODE (ref) == RECORD_TYPE
9192 && CLASSTYPE_DECLARED_CLASS (ref)
9193 ? access_private_node : access_public_node);
9195 /* First, make sure that any templates in base-classes are
9196 instantiated. This ensures that if we call ourselves recursively
9197 we do not get confused about which classes are marked and which
9202 tree basetype = TREE_VALUE (*basep);
9204 if (!(processing_template_decl && uses_template_parms (basetype))
9205 && !complete_type_or_else (basetype, NULL))
9206 /* An incomplete type. Remove it from the list. */
9207 *basep = TREE_CHAIN (*basep);
9211 if (TREE_TYPE (*basep))
9213 if (CLASS_TYPE_P (basetype))
9214 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9215 basep = &TREE_CHAIN (*basep);
9219 SET_CLASSTYPE_MARKED (ref);
9221 /* The binfo slot should be empty, unless this is an (ill-formed)
9223 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9224 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9226 binfo = make_tree_binfo (max_bases);
9228 TYPE_BINFO (ref) = binfo;
9229 BINFO_OFFSET (binfo) = size_zero_node;
9230 BINFO_TYPE (binfo) = ref;
9234 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, max_bases);
9235 /* An aggregate cannot have baseclasses. */
9236 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9238 if (TREE_CODE (ref) == UNION_TYPE)
9239 error ("derived union `%T' invalid", ref);
9244 if (TYPE_FOR_JAVA (ref))
9245 error ("Java class '%T' cannot have multiple bases", ref);
9250 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, max_vbases);
9252 if (TYPE_FOR_JAVA (ref))
9253 error ("Java class '%T' cannot have virtual bases", ref);
9256 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9258 tree access = TREE_PURPOSE (base_list);
9259 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9260 tree basetype = TREE_VALUE (base_list);
9262 if (access == access_default_node)
9263 access = default_access;
9265 if (TREE_CODE (basetype) == TYPE_DECL)
9266 basetype = TREE_TYPE (basetype);
9267 if (TREE_CODE (basetype) != RECORD_TYPE
9268 && TREE_CODE (basetype) != TYPENAME_TYPE
9269 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9270 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9272 error ("base type `%T' fails to be a struct or class type",
9277 if (CLASSTYPE_MARKED (basetype))
9279 if (basetype == ref)
9280 error ("recursive type `%T' undefined", basetype);
9282 error ("duplicate base type `%T' invalid", basetype);
9285 SET_CLASSTYPE_MARKED (basetype);
9287 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9288 TYPE_FOR_JAVA (ref) = 1;
9290 base_binfo = NULL_TREE;
9291 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9293 base_binfo = TYPE_BINFO (basetype);
9294 /* The original basetype could have been a typedef'd type. */
9295 basetype = BINFO_TYPE (base_binfo);
9297 /* Inherit flags from the base. */
9298 TYPE_HAS_NEW_OPERATOR (ref)
9299 |= TYPE_HAS_NEW_OPERATOR (basetype);
9300 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9301 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9302 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9303 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9306 base_binfo = copy_binfo (base_binfo, basetype, ref,
9307 &igo_prev, via_virtual);
9308 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9309 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9311 BINFO_BASE_APPEND (binfo, base_binfo);
9312 BINFO_BASE_ACCESS_APPEND (binfo, access);
9315 /* Unmark all the types. */
9316 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9317 CLEAR_CLASSTYPE_MARKED (BINFO_TYPE (base_binfo));
9318 CLEAR_CLASSTYPE_MARKED (ref);
9322 /* Begin compiling the definition of an enumeration type.
9323 NAME is its name (or null if anonymous).
9324 Returns the type object, as yet incomplete.
9325 Also records info about it so that build_enumerator
9326 may be used to declare the individual values as they are read. */
9329 start_enum (tree name)
9331 tree enumtype = NULL_TREE;
9332 struct cp_binding_level *b = current_binding_level;
9334 /* If this is the real definition for a previous forward reference,
9335 fill in the contents in the same object that used to be the
9336 forward reference. */
9338 if (name != NULL_TREE)
9339 enumtype = lookup_tag (ENUMERAL_TYPE, name, b, 1);
9341 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9343 error ("multiple definition of `%#T'", enumtype);
9344 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9345 /* Clear out TYPE_VALUES, and start again. */
9346 TYPE_VALUES (enumtype) = NULL_TREE;
9350 enumtype = make_node (ENUMERAL_TYPE);
9351 pushtag (name, enumtype, 0);
9357 /* After processing and defining all the values of an enumeration type,
9358 install their decls in the enumeration type and finish it off.
9359 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9362 finish_enum (tree enumtype)
9374 integer_type_kind itk;
9375 tree underlying_type = NULL_TREE;
9377 /* We built up the VALUES in reverse order. */
9378 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9380 /* For an enum defined in a template, just set the type of the values;
9381 all further processing is postponed until the template is
9382 instantiated. We need to set the type so that tsubst of a CONST_DECL
9384 if (processing_template_decl)
9386 for (values = TYPE_VALUES (enumtype);
9388 values = TREE_CHAIN (values))
9389 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9390 if (at_function_scope_p ())
9391 add_stmt (build_min (TAG_DEFN, enumtype));
9395 /* Determine the minimum and maximum values of the enumerators. */
9396 if (TYPE_VALUES (enumtype))
9398 minnode = maxnode = NULL_TREE;
9400 for (values = TYPE_VALUES (enumtype);
9402 values = TREE_CHAIN (values))
9404 decl = TREE_VALUE (values);
9406 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9407 each enumerator has the type of its enumeration. Prior to the
9408 closing brace, the type of each enumerator is the type of its
9409 initializing value. */
9410 TREE_TYPE (decl) = enumtype;
9412 /* Update the minimum and maximum values, if appropriate. */
9413 value = DECL_INITIAL (decl);
9414 /* Figure out what the minimum and maximum values of the
9417 minnode = maxnode = value;
9418 else if (tree_int_cst_lt (maxnode, value))
9420 else if (tree_int_cst_lt (value, minnode))
9427 If the enumerator-list is empty, the underlying type is as if
9428 the enumeration had a single enumerator with value 0. */
9429 minnode = maxnode = integer_zero_node;
9431 /* Compute the number of bits require to represent all values of the
9432 enumeration. We must do this before the type of MINNODE and
9433 MAXNODE are transformed, since min_precision relies on the
9434 TREE_TYPE of the value it is passed. */
9435 unsignedp = tree_int_cst_sgn (minnode) >= 0;
9436 lowprec = min_precision (minnode, unsignedp);
9437 highprec = min_precision (maxnode, unsignedp);
9438 precision = MAX (lowprec, highprec);
9440 /* Determine the underlying type of the enumeration.
9444 The underlying type of an enumeration is an integral type that
9445 can represent all the enumerator values defined in the
9446 enumeration. It is implementation-defined which integral type is
9447 used as the underlying type for an enumeration except that the
9448 underlying type shall not be larger than int unless the value of
9449 an enumerator cannot fit in an int or unsigned int.
9451 We use "int" or an "unsigned int" as the underlying type, even if
9452 a smaller integral type would work, unless the user has
9453 explicitly requested that we use the smallest possible type. */
9454 for (itk = (flag_short_enums ? itk_char : itk_int);
9458 underlying_type = integer_types[itk];
9459 if (TYPE_PRECISION (underlying_type) >= precision
9460 && TYPE_UNSIGNED (underlying_type) == unsignedp)
9463 if (itk == itk_none)
9467 IF no integral type can represent all the enumerator values, the
9468 enumeration is ill-formed. */
9469 error ("no integral type can represent all of the enumerator values "
9470 "for `%T'", enumtype);
9471 precision = TYPE_PRECISION (long_long_integer_type_node);
9472 underlying_type = integer_types[itk_unsigned_long_long];
9475 /* Compute the minium and maximum values for the type.
9479 For an enumeration where emin is the smallest enumerator and emax
9480 is the largest, the values of the enumeration are the values of the
9481 underlying type in the range bmin to bmax, where bmin and bmax are,
9482 respectively, the smallest and largest values of the smallest bit-
9483 field that can store emin and emax. */
9485 /* The middle-end currently assumes that types with TYPE_PRECISION
9486 narrower than their underlying type are suitably zero or sign
9487 extended to fill their mode. g++ doesn't make these guarantees.
9488 Until the middle-end can represent such paradoxical types, we
9489 set the TYPE_PRECISION to the width of the underlying type. */
9490 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
9492 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
9496 The value of sizeof() applied to an enumeration type, an object
9497 of an enumeration type, or an enumerator, is the value of sizeof()
9498 applied to the underlying type. */
9499 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
9500 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
9501 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
9502 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
9503 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
9504 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
9506 /* Convert each of the enumerators to the type of the underlying
9507 type of the enumeration. */
9508 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
9510 decl = TREE_VALUE (values);
9511 value = perform_implicit_conversion (underlying_type,
9512 DECL_INITIAL (decl));
9514 /* Do not clobber shared ints. */
9515 value = copy_node (value);
9517 TREE_TYPE (value) = enumtype;
9518 DECL_INITIAL (decl) = value;
9519 TREE_VALUE (values) = value;
9522 /* Fix up all variant types of this enum type. */
9523 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
9525 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
9526 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
9527 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
9528 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
9529 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
9530 TYPE_MODE (t) = TYPE_MODE (enumtype);
9531 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
9532 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
9533 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
9534 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
9537 /* Finish debugging output for this type. */
9538 rest_of_type_compilation (enumtype, namespace_bindings_p ());
9541 /* Build and install a CONST_DECL for an enumeration constant of the
9542 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9543 Assignment of sequential values by default is handled here. */
9546 build_enumerator (tree name, tree value, tree enumtype)
9552 /* Remove no-op casts from the value. */
9554 STRIP_TYPE_NOPS (value);
9556 if (! processing_template_decl)
9558 /* Validate and default VALUE. */
9559 if (value != NULL_TREE)
9561 value = decl_constant_value (value);
9563 if (TREE_CODE (value) == INTEGER_CST)
9565 value = perform_integral_promotions (value);
9566 constant_expression_warning (value);
9570 error ("enumerator value for `%D' not integer constant", name);
9575 /* Default based on previous value. */
9576 if (value == NULL_TREE)
9578 if (TYPE_VALUES (enumtype))
9581 unsigned HOST_WIDE_INT lo;
9585 /* The next value is the previous value plus one. We can
9586 safely assume that the previous value is an INTEGER_CST.
9587 add_double doesn't know the type of the target expression,
9588 so we must check with int_fits_type_p as well. */
9589 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
9590 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
9591 TREE_INT_CST_HIGH (prev_value),
9593 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
9594 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
9597 error ("overflow in enumeration values at `%D'", name);
9600 value = integer_zero_node;
9603 /* Remove no-op casts from the value. */
9604 STRIP_TYPE_NOPS (value);
9607 /* C++ associates enums with global, function, or class declarations. */
9608 context = current_scope ();
9610 context = current_namespace;
9612 /* Build the actual enumeration constant. Note that the enumeration
9613 constants have the type of their initializers until the
9614 enumeration is complete:
9618 Following the closing brace of an enum-specifier, each enumer-
9619 ator has the type of its enumeration. Prior to the closing
9620 brace, the type of each enumerator is the type of its
9623 In finish_enum we will reset the type. Of course, if we're
9624 processing a template, there may be no value. */
9625 type = value ? TREE_TYPE (value) : NULL_TREE;
9627 if (context && context == current_class_type)
9628 /* This enum declaration is local to the class. We need the full
9629 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9630 decl = build_lang_decl (CONST_DECL, name, type);
9632 /* It's a global enum, or it's local to a function. (Note local to
9633 a function could mean local to a class method. */
9634 decl = build_decl (CONST_DECL, name, type);
9636 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
9637 TREE_CONSTANT (decl) = 1;
9638 TREE_INVARIANT (decl) = 1;
9639 TREE_READONLY (decl) = 1;
9640 DECL_INITIAL (decl) = value;
9642 if (context && context == current_class_type)
9643 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9644 on the TYPE_FIELDS list for `S'. (That's so that you can say
9645 things like `S::i' later.) */
9646 finish_member_declaration (decl);
9650 /* Add this enumeration constant to the list for this type. */
9651 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
9655 /* We're defining DECL. Make sure that it's type is OK. */
9658 check_function_type (tree decl, tree current_function_parms)
9660 tree fntype = TREE_TYPE (decl);
9661 tree return_type = complete_type (TREE_TYPE (fntype));
9663 /* In a function definition, arg types must be complete. */
9664 require_complete_types_for_parms (current_function_parms);
9666 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
9668 error ("return type `%#T' is incomplete", TREE_TYPE (fntype));
9670 /* Make it return void instead, but don't change the
9671 type of the DECL_RESULT, in case we have a named return value. */
9672 if (TREE_CODE (fntype) == METHOD_TYPE)
9674 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
9676 = build_method_type_directly (ctype,
9678 FUNCTION_ARG_CHAIN (decl));
9682 = build_function_type (void_type_node,
9683 TYPE_ARG_TYPES (TREE_TYPE (decl)));
9685 = build_exception_variant (fntype,
9686 TYPE_RAISES_EXCEPTIONS (fntype));
9689 abstract_virtuals_error (decl, TREE_TYPE (fntype));
9692 /* Create the FUNCTION_DECL for a function definition.
9693 DECLSPECS and DECLARATOR are the parts of the declaration;
9694 they describe the function's name and the type it returns,
9695 but twisted together in a fashion that parallels the syntax of C.
9697 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9698 DECLARATOR is really the DECL for the function we are about to
9699 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9700 indicating that the function is an inline defined in-class.
9702 This function creates a binding context for the function body
9703 as well as setting up the FUNCTION_DECL in current_function_decl.
9705 For C++, we must first check whether that datum makes any sense.
9706 For example, "class A local_a(1,2);" means that variable local_a
9707 is an aggregate of type A, which should have a constructor
9708 applied to it with the argument list [1, 2]. */
9711 start_preparsed_function (tree decl1, tree attrs, int flags)
9713 tree ctype = NULL_TREE;
9716 int doing_friend = 0;
9717 struct cp_binding_level *bl;
9718 tree current_function_parms;
9719 struct c_fileinfo *finfo = get_fileinfo (lbasename (input_filename));
9722 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
9723 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
9725 fntype = TREE_TYPE (decl1);
9726 if (TREE_CODE (fntype) == METHOD_TYPE)
9727 ctype = TYPE_METHOD_BASETYPE (fntype);
9729 /* ISO C++ 11.4/5. A friend function defined in a class is in
9730 the (lexical) scope of the class in which it is defined. */
9731 if (!ctype && DECL_FRIEND_P (decl1))
9733 ctype = DECL_FRIEND_CONTEXT (decl1);
9735 /* CTYPE could be null here if we're dealing with a template;
9736 for example, `inline friend float foo()' inside a template
9737 will have no CTYPE set. */
9738 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
9744 if (DECL_DECLARED_INLINE_P (decl1)
9745 && lookup_attribute ("noinline", attrs))
9746 warning ("%Jinline function '%D' given attribute noinline", decl1, decl1);
9748 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
9749 /* This is a constructor, we must ensure that any default args
9750 introduced by this definition are propagated to the clones
9751 now. The clones are used directly in overload resolution. */
9752 adjust_clone_args (decl1);
9754 /* Sometimes we don't notice that a function is a static member, and
9755 build a METHOD_TYPE for it. Fix that up now. */
9756 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
9757 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
9759 revert_static_member_fn (decl1);
9763 /* Set up current_class_type, and enter the scope of the class, if
9766 push_nested_class (ctype);
9767 else if (DECL_STATIC_FUNCTION_P (decl1))
9768 push_nested_class (DECL_CONTEXT (decl1));
9770 /* Now that we have entered the scope of the class, we must restore
9771 the bindings for any template parameters surrounding DECL1, if it
9772 is an inline member template. (Order is important; consider the
9773 case where a template parameter has the same name as a field of
9774 the class.) It is not until after this point that
9775 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
9776 if (flags & SF_INCLASS_INLINE)
9777 maybe_begin_member_template_processing (decl1);
9779 /* Effective C++ rule 15. */
9781 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
9782 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
9783 warning ("`operator=' should return a reference to `*this'");
9785 /* Make the init_value nonzero so pushdecl knows this is not tentative.
9786 error_mark_node is replaced below (in poplevel) with the BLOCK. */
9787 if (!DECL_INITIAL (decl1))
9788 DECL_INITIAL (decl1) = error_mark_node;
9790 /* This function exists in static storage.
9791 (This does not mean `static' in the C sense!) */
9792 TREE_STATIC (decl1) = 1;
9794 /* We must call push_template_decl after current_class_type is set
9795 up. (If we are processing inline definitions after exiting a
9796 class scope, current_class_type will be NULL_TREE until set above
9797 by push_nested_class.) */
9798 if (processing_template_decl)
9799 decl1 = push_template_decl (decl1);
9801 /* We are now in the scope of the function being defined. */
9802 current_function_decl = decl1;
9804 /* Save the parm names or decls from this function's declarator
9805 where store_parm_decls will find them. */
9806 current_function_parms = DECL_ARGUMENTS (decl1);
9808 /* Make sure the parameter and return types are reasonable. When
9809 you declare a function, these types can be incomplete, but they
9810 must be complete when you define the function. */
9811 if (! processing_template_decl)
9812 check_function_type (decl1, current_function_parms);
9814 /* Build the return declaration for the function. */
9815 restype = TREE_TYPE (fntype);
9816 /* Promote the value to int before returning it. */
9817 if (c_promoting_integer_type_p (restype))
9818 restype = type_promotes_to (restype);
9819 if (DECL_RESULT (decl1) == NULL_TREE)
9823 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
9824 DECL_ARTIFICIAL (resdecl) = 1;
9825 DECL_IGNORED_P (resdecl) = 1;
9826 DECL_RESULT (decl1) = resdecl;
9828 c_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
9831 /* Initialize RTL machinery. We cannot do this until
9832 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
9833 even when processing a template; this is how we get
9834 CFUN set up, and our per-function variables initialized.
9835 FIXME factor out the non-RTL stuff. */
9836 bl = current_binding_level;
9837 allocate_struct_function (decl1);
9838 current_binding_level = bl;
9840 /* Even though we're inside a function body, we still don't want to
9841 call expand_expr to calculate the size of a variable-sized array.
9842 We haven't necessarily assigned RTL to all variables yet, so it's
9843 not safe to try to expand expressions involving them. */
9844 cfun->x_dont_save_pending_sizes_p = 1;
9846 /* Start the statement-tree, start the tree now. */
9847 DECL_SAVED_TREE (decl1) = push_stmt_list ();
9849 /* Let the user know we're compiling this function. */
9850 announce_function (decl1);
9852 /* Record the decl so that the function name is defined.
9853 If we already have a decl for this name, and it is a FUNCTION_DECL,
9854 use the old decl. */
9855 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
9857 /* A specialization is not used to guide overload resolution. */
9858 if (!DECL_FUNCTION_MEMBER_P (decl1)
9859 && !(DECL_USE_TEMPLATE (decl1) &&
9860 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
9862 tree olddecl = pushdecl (decl1);
9864 if (olddecl == error_mark_node)
9865 /* If something went wrong when registering the declaration,
9866 use DECL1; we have to have a FUNCTION_DECL to use when
9867 parsing the body of the function. */
9870 /* Otherwise, OLDDECL is either a previous declaration of
9871 the same function or DECL1 itself. */
9876 /* We need to set the DECL_CONTEXT. */
9877 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
9878 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
9879 /* And make sure we have enough default args. */
9880 check_default_args (decl1);
9882 fntype = TREE_TYPE (decl1);
9885 /* Determine the ELF visibility attribute for the function. We must
9886 not do this before calling "pushdecl", as we must allow
9887 "duplicate_decls" to merge any attributes appropriately. */
9888 if (!DECL_CLONED_FUNCTION_P (decl1))
9889 determine_visibility (decl1);
9891 /* Reset these in case the call to pushdecl changed them. */
9892 current_function_decl = decl1;
9895 /* If we are (erroneously) defining a function that we have already
9896 defined before, wipe out what we knew before. */
9897 if (!DECL_PENDING_INLINE_P (decl1))
9898 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
9900 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
9902 /* We know that this was set up by `grokclassfn'. We do not
9903 wait until `store_parm_decls', since evil parse errors may
9904 never get us to that point. Here we keep the consistency
9905 between `current_class_type' and `current_class_ptr'. */
9906 tree t = DECL_ARGUMENTS (decl1);
9908 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
9909 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
9911 cp_function_chain->x_current_class_ref
9912 = build_indirect_ref (t, NULL);
9913 cp_function_chain->x_current_class_ptr = t;
9915 /* Constructors and destructors need to know whether they're "in
9916 charge" of initializing virtual base classes. */
9918 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
9920 current_in_charge_parm = t;
9923 if (DECL_HAS_VTT_PARM_P (decl1))
9925 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
9926 current_vtt_parm = t;
9930 if (DECL_INTERFACE_KNOWN (decl1))
9932 tree ctx = decl_function_context (decl1);
9934 if (DECL_NOT_REALLY_EXTERN (decl1))
9935 DECL_EXTERNAL (decl1) = 0;
9937 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
9938 && TREE_PUBLIC (ctx))
9939 /* This is a function in a local class in an extern inline
9941 comdat_linkage (decl1);
9943 /* If this function belongs to an interface, it is public.
9944 If it belongs to someone else's interface, it is also external.
9945 This only affects inlines and template instantiations. */
9946 else if (finfo->interface_unknown == 0
9947 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
9949 if (DECL_DECLARED_INLINE_P (decl1)
9950 || DECL_TEMPLATE_INSTANTIATION (decl1)
9951 || processing_template_decl)
9953 DECL_EXTERNAL (decl1)
9954 = (finfo->interface_only
9955 || (DECL_DECLARED_INLINE_P (decl1)
9956 && ! flag_implement_inlines
9957 && !DECL_VINDEX (decl1)));
9959 /* For WIN32 we also want to put these in linkonce sections. */
9960 maybe_make_one_only (decl1);
9963 DECL_EXTERNAL (decl1) = 0;
9964 DECL_NOT_REALLY_EXTERN (decl1) = 0;
9965 DECL_INTERFACE_KNOWN (decl1) = 1;
9966 /* If this function is in an interface implemented in this file,
9967 make sure that the backend knows to emit this function
9969 if (!DECL_EXTERNAL (decl1))
9970 mark_needed (decl1);
9972 else if (finfo->interface_unknown && finfo->interface_only
9973 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
9975 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
9976 interface, we will have both finfo->interface_unknown and
9977 finfo->interface_only set. In that case, we don't want to
9978 use the normal heuristics because someone will supply a
9979 #pragma implementation elsewhere, and deducing it here would
9980 produce a conflict. */
9981 comdat_linkage (decl1);
9982 DECL_EXTERNAL (decl1) = 0;
9983 DECL_INTERFACE_KNOWN (decl1) = 1;
9984 DECL_DEFER_OUTPUT (decl1) = 1;
9988 /* This is a definition, not a reference.
9989 So clear DECL_EXTERNAL. */
9990 DECL_EXTERNAL (decl1) = 0;
9992 if ((DECL_DECLARED_INLINE_P (decl1)
9993 || DECL_TEMPLATE_INSTANTIATION (decl1))
9994 && ! DECL_INTERFACE_KNOWN (decl1)
9995 /* Don't try to defer nested functions for now. */
9996 && ! decl_function_context (decl1))
9997 DECL_DEFER_OUTPUT (decl1) = 1;
9999 DECL_INTERFACE_KNOWN (decl1) = 1;
10002 begin_scope (sk_function_parms, decl1);
10006 if (DECL_DESTRUCTOR_P (decl1)
10007 || (DECL_CONSTRUCTOR_P (decl1)
10008 && targetm.cxx.cdtor_returns_this ()))
10010 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10011 DECL_CONTEXT (cdtor_label) = current_function_decl;
10014 start_fname_decls ();
10016 store_parm_decls (current_function_parms);
10020 /* Like start_preparsed_function, except that instead of a
10021 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10023 Returns 1 on success. If the DECLARATOR is not suitable for a function
10024 (it defines a datum instead), we return 0, which tells
10025 yyparse to report a parse error. */
10028 start_function (cp_decl_specifier_seq *declspecs,
10029 const cp_declarator *declarator,
10034 if (have_extern_spec)
10036 declspecs->storage_class = sc_extern;
10037 /* This should only be done once on the outermost decl. */
10038 have_extern_spec = false;
10041 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10042 /* If the declarator is not suitable for a function definition,
10043 cause a syntax error. */
10044 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10047 cplus_decl_attributes (&decl1, attrs, 0);
10049 /* If #pragma weak was used, mark the decl weak now. */
10050 if (global_scope_p (current_binding_level))
10051 maybe_apply_pragma_weak (decl1);
10053 if (DECL_MAIN_P (decl1))
10055 /* If this doesn't return integer_type, or a typedef to
10056 integer_type, complain. */
10057 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl1)), integer_type_node))
10059 if (pedantic || warn_return_type)
10060 pedwarn ("return type for `main' changed to `int'");
10061 TREE_TYPE (decl1) = default_function_type;
10065 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10070 /* Store the parameter declarations into the current function declaration.
10071 This is called after parsing the parameter declarations, before
10072 digesting the body of the function.
10074 Also install to binding contour return value identifier, if any. */
10077 store_parm_decls (tree current_function_parms)
10079 tree fndecl = current_function_decl;
10082 /* This is a chain of any other decls that came in among the parm
10083 declarations. If a parm is declared with enum {foo, bar} x;
10084 then CONST_DECLs for foo and bar are put here. */
10085 tree nonparms = NULL_TREE;
10087 if (current_function_parms)
10089 /* This case is when the function was defined with an ANSI prototype.
10090 The parms already have decls, so we need not do anything here
10091 except record them as in effect
10092 and complain if any redundant old-style parm decls were written. */
10094 tree specparms = current_function_parms;
10097 /* Must clear this because it might contain TYPE_DECLs declared
10099 current_binding_level->names = NULL;
10101 /* If we're doing semantic analysis, then we'll call pushdecl
10102 for each of these. We must do them in reverse order so that
10103 they end in the correct forward order. */
10104 specparms = nreverse (specparms);
10106 for (parm = specparms; parm; parm = next)
10108 next = TREE_CHAIN (parm);
10109 if (TREE_CODE (parm) == PARM_DECL)
10111 if (DECL_NAME (parm) == NULL_TREE
10112 || TREE_CODE (parm) != VOID_TYPE)
10115 error ("parameter `%D' declared void", parm);
10119 /* If we find an enum constant or a type tag,
10120 put it aside for the moment. */
10121 TREE_CHAIN (parm) = NULL_TREE;
10122 nonparms = chainon (nonparms, parm);
10126 /* Get the decls in their original chain order and record in the
10127 function. This is all and only the PARM_DECLs that were
10128 pushed into scope by the loop above. */
10129 DECL_ARGUMENTS (fndecl) = getdecls ();
10132 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10134 /* Now store the final chain of decls for the arguments
10135 as the decl-chain of the current lexical scope.
10136 Put the enumerators in as well, at the front so that
10137 DECL_ARGUMENTS is not modified. */
10138 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10140 /* For a cloned function, we've already got all the code we need;
10141 there's no need to add any extra bits. */
10142 if (!DECL_CLONED_FUNCTION_P (fndecl))
10144 /* Do the starting of the exception specifications, if we have any. */
10145 if (flag_exceptions && !processing_template_decl
10146 && flag_enforce_eh_specs
10147 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10148 current_eh_spec_block = begin_eh_spec_block ();
10153 /* We have finished doing semantic analysis on DECL, but have not yet
10154 generated RTL for its body. Save away our current state, so that
10155 when we want to generate RTL later we know what to do. */
10158 save_function_data (tree decl)
10160 struct language_function *f;
10162 /* Save the language-specific per-function data so that we can
10163 get it back when we really expand this function. */
10164 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10167 f = GGC_NEW (struct language_function);
10168 memcpy (f, cp_function_chain, sizeof (struct language_function));
10169 DECL_SAVED_FUNCTION_DATA (decl) = f;
10171 /* Clear out the bits we don't need. */
10172 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10173 f->x_named_label_uses = NULL;
10174 f->bindings = NULL;
10175 f->x_local_names = NULL;
10179 /* Set the return value of the constructor (if present). */
10182 finish_constructor_body (void)
10187 if (targetm.cxx.cdtor_returns_this ())
10189 /* Any return from a constructor will end up here. */
10190 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10192 val = DECL_ARGUMENTS (current_function_decl);
10193 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10194 DECL_RESULT (current_function_decl), val);
10195 /* Return the address of the object. */
10196 exprstmt = build_stmt (RETURN_EXPR, val);
10197 add_stmt (exprstmt);
10201 /* Do all the processing for the beginning of a destructor; set up the
10202 vtable pointers and cleanups for bases and members. */
10205 begin_destructor_body (void)
10208 tree compound_stmt;
10210 /* If the dtor is empty, and we know there is not any possible
10211 way we could use any vtable entries, before they are possibly
10212 set by a base class dtor, we don't have to setup the vtables,
10213 as we know that any base class dtor will set up any vtables
10214 it needs. We avoid MI, because one base class dtor can do a
10215 virtual dispatch to an overridden function that would need to
10216 have a non-related vtable set up, we cannot avoid setting up
10217 vtables in that case. We could change this to see if there
10218 is just one vtable.
10220 ??? In the destructor for a class, the vtables are set
10221 appropriately for that class. There will be no non-related
10222 vtables. jason 2001-12-11. */
10223 if_stmt = begin_if_stmt ();
10225 /* If it is not safe to avoid setting up the vtables, then
10226 someone will change the condition to be boolean_true_node.
10227 (Actually, for now, we do not have code to set the condition
10228 appropriately, so we just assume that we always need to
10229 initialize the vtables.) */
10230 finish_if_stmt_cond (boolean_true_node, if_stmt);
10232 compound_stmt = begin_compound_stmt (0);
10234 /* Make all virtual function table pointers in non-virtual base
10235 classes point to CURRENT_CLASS_TYPE's virtual function
10237 initialize_vtbl_ptrs (current_class_ptr);
10239 finish_compound_stmt (compound_stmt);
10240 finish_then_clause (if_stmt);
10241 finish_if_stmt (if_stmt);
10243 /* And insert cleanups for our bases and members so that they
10244 will be properly destroyed if we throw. */
10245 push_base_cleanups ();
10248 /* At the end of every destructor we generate code to delete the object if
10249 necessary. Do that now. */
10252 finish_destructor_body (void)
10256 /* Any return from a destructor will end up here; that way all base
10257 and member cleanups will be run when the function returns. */
10258 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10260 /* In a virtual destructor, we must call delete. */
10261 if (DECL_VIRTUAL_P (current_function_decl))
10264 tree virtual_size = cxx_sizeof (current_class_type);
10268 At the point of definition of a virtual destructor (including
10269 an implicit definition), non-placement operator delete shall
10270 be looked up in the scope of the destructor's class and if
10271 found shall be accessible and unambiguous. */
10272 exprstmt = build_op_delete_call
10273 (DELETE_EXPR, current_class_ptr, virtual_size,
10274 /*global_p=*/false, NULL_TREE);
10276 if_stmt = begin_if_stmt ();
10277 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10278 current_in_charge_parm,
10281 finish_expr_stmt (exprstmt);
10282 finish_then_clause (if_stmt);
10283 finish_if_stmt (if_stmt);
10286 if (targetm.cxx.cdtor_returns_this ())
10290 val = DECL_ARGUMENTS (current_function_decl);
10291 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10292 DECL_RESULT (current_function_decl), val);
10293 /* Return the address of the object. */
10294 exprstmt = build_stmt (RETURN_EXPR, val);
10295 add_stmt (exprstmt);
10299 /* Do the necessary processing for the beginning of a function body, which
10300 in this case includes member-initializers, but not the catch clauses of
10301 a function-try-block. Currently, this means opening a binding level
10302 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10303 In other functions, this isn't necessary, but it doesn't hurt. */
10306 begin_function_body (void)
10310 if (processing_template_decl)
10311 /* Do nothing now. */;
10313 /* Always keep the BLOCK node associated with the outermost pair of
10314 curly braces of a function. These are needed for correct
10315 operation of dwarfout.c. */
10316 keep_next_level (true);
10318 stmt = begin_compound_stmt (BCS_FN_BODY);
10320 if (processing_template_decl)
10321 /* Do nothing now. */;
10322 else if (DECL_DESTRUCTOR_P (current_function_decl))
10323 begin_destructor_body ();
10328 /* Do the processing for the end of a function body. Currently, this means
10329 closing out the cleanups for fully-constructed bases and members, and in
10330 the case of the destructor, deleting the object if desired. Again, this
10331 is only meaningful for [cd]tors, since they are the only functions where
10332 there is a significant distinction between the main body and any
10333 function catch clauses. Handling, say, main() return semantics here
10334 would be wrong, as flowing off the end of a function catch clause for
10335 main() would also need to return 0. */
10338 finish_function_body (tree compstmt)
10340 /* Close the block. */
10341 finish_compound_stmt (compstmt);
10343 if (processing_template_decl)
10344 /* Do nothing now. */;
10345 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10346 finish_constructor_body ();
10347 else if (DECL_DESTRUCTOR_P (current_function_decl))
10348 finish_destructor_body ();
10351 /* Finish up a function declaration and compile that function
10352 all the way to assembler language output. The free the storage
10353 for the function definition.
10355 FLAGS is a bitwise or of the following values:
10357 We just finished processing the body of an in-class inline
10358 function definition. (This processing will have taken place
10359 after the class definition is complete.) */
10362 finish_function (int flags)
10364 tree fndecl = current_function_decl;
10365 tree fntype, ctype = NULL_TREE;
10366 int inclass_inline = (flags & 2) != 0;
10369 /* When we get some parse errors, we can end up without a
10370 current_function_decl, so cope. */
10371 if (fndecl == NULL_TREE)
10372 return error_mark_node;
10374 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10375 && DECL_VIRTUAL_P (fndecl)
10376 && !processing_template_decl)
10378 tree fnclass = DECL_CONTEXT (fndecl);
10379 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10380 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10383 nested = function_depth > 1;
10384 fntype = TREE_TYPE (fndecl);
10386 /* TREE_READONLY (fndecl) = 1;
10387 This caused &foo to be of type ptr-to-const-function
10388 which then got a warning when stored in a ptr-to-function variable. */
10390 gcc_assert (building_stmt_tree ());
10392 /* For a cloned function, we've already got all the code we need;
10393 there's no need to add any extra bits. */
10394 if (!DECL_CLONED_FUNCTION_P (fndecl))
10396 if (DECL_MAIN_P (current_function_decl))
10398 /* Make it so that `main' always returns 0 by default. */
10400 finish_return_stmt (integer_one_node);
10402 finish_return_stmt (integer_zero_node);
10406 /* Finish dealing with exception specifiers. */
10407 if (flag_exceptions && !processing_template_decl
10408 && flag_enforce_eh_specs
10409 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10410 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10411 (TREE_TYPE (current_function_decl)),
10412 current_eh_spec_block);
10415 /* If we're saving up tree structure, tie off the function now. */
10416 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
10418 finish_fname_decls ();
10420 /* If this function can't throw any exceptions, remember that. */
10421 if (!processing_template_decl
10422 && !cp_function_chain->can_throw
10423 && !flag_non_call_exceptions)
10424 TREE_NOTHROW (fndecl) = 1;
10426 /* This must come after expand_function_end because cleanups might
10427 have declarations (from inline functions) that need to go into
10428 this function's blocks. */
10430 /* If the current binding level isn't the outermost binding level
10431 for this function, either there is a bug, or we have experienced
10432 syntax errors and the statement tree is malformed. */
10433 if (current_binding_level->kind != sk_function_parms)
10435 /* Make sure we have already experienced errors. */
10436 gcc_assert (errorcount);
10438 /* Throw away the broken statement tree and extra binding
10440 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
10442 while (current_binding_level->kind != sk_function_parms)
10444 if (current_binding_level->kind == sk_class)
10445 pop_nested_class ();
10447 poplevel (0, 0, 0);
10450 poplevel (1, 0, 1);
10452 /* Statements should always be full-expressions at the outermost set
10453 of curly braces for a function. */
10454 gcc_assert (stmts_are_full_exprs_p ());
10456 /* Set up the named return value optimization, if we can. Candidate
10457 variables are selected in check_return_value. */
10458 if (current_function_return_value)
10460 tree r = current_function_return_value;
10463 if (r != error_mark_node
10464 /* This is only worth doing for fns that return in memory--and
10465 simpler, since we don't have to worry about promoted modes. */
10466 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
10467 /* Only allow this for variables declared in the outer scope of
10468 the function so we know that their lifetime always ends with a
10469 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10470 we were to do this optimization in tree-ssa. */
10471 && (outer = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl)))
10472 /* Skip the artificial function body block. */
10473 && (outer = BLOCK_SUBBLOCKS (outer))
10474 && chain_member (r, BLOCK_VARS (outer)))
10475 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
10477 current_function_return_value = NULL_TREE;
10480 /* Remember that we were in class scope. */
10481 if (current_class_name)
10482 ctype = current_class_type;
10484 /* Must mark the RESULT_DECL as being in this function. */
10485 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
10487 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10488 to the FUNCTION_DECL node itself. */
10489 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
10491 /* Save away current state, if appropriate. */
10492 if (!processing_template_decl)
10493 save_function_data (fndecl);
10495 /* Complain if there's just no return statement. */
10496 if (warn_return_type
10497 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
10498 && !dependent_type_p (TREE_TYPE (fntype))
10499 && !current_function_returns_value && !current_function_returns_null
10500 /* Don't complain if we abort or throw. */
10501 && !current_function_returns_abnormally
10502 && !DECL_NAME (DECL_RESULT (fndecl))
10503 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10504 inline function, as we might never be compiled separately. */
10505 && (DECL_INLINE (fndecl) || processing_template_decl)
10506 /* Structor return values (if any) are set by the compiler. */
10507 && !DECL_CONSTRUCTOR_P (fndecl)
10508 && !DECL_DESTRUCTOR_P (fndecl))
10509 warning ("no return statement in function returning non-void");
10511 /* Store the end of the function, so that we get good line number
10512 info for the epilogue. */
10513 cfun->function_end_locus = input_location;
10515 /* Genericize before inlining. */
10516 if (!processing_template_decl)
10518 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
10519 cp_genericize (fndecl);
10520 /* Clear out the bits we don't need. */
10521 f->x_current_class_ptr = NULL;
10522 f->x_current_class_ref = NULL;
10523 f->x_eh_spec_block = NULL;
10524 f->x_in_charge_parm = NULL;
10525 f->x_vtt_parm = NULL;
10526 f->x_return_value = NULL;
10527 f->bindings = NULL;
10529 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10530 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
10532 /* Clear out the bits we don't need. */
10533 local_names = NULL;
10534 named_label_uses = NULL;
10536 /* We're leaving the context of this function, so zap cfun. It's still in
10537 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10539 current_function_decl = NULL;
10541 /* If this is an in-class inline definition, we may have to pop the
10542 bindings for the template parameters that we added in
10543 maybe_begin_member_template_processing when start_function was
10545 if (inclass_inline)
10546 maybe_end_member_template_processing ();
10548 /* Leave the scope of the class. */
10550 pop_nested_class ();
10556 /* Let the error reporting routines know that we're outside a
10557 function. For a nested function, this value is used in
10558 cxx_pop_function_context and then reset via pop_function_context. */
10559 current_function_decl = NULL_TREE;
10564 /* Create the FUNCTION_DECL for a function definition.
10565 DECLSPECS and DECLARATOR are the parts of the declaration;
10566 they describe the return type and the name of the function,
10567 but twisted together in a fashion that parallels the syntax of C.
10569 This function creates a binding context for the function body
10570 as well as setting up the FUNCTION_DECL in current_function_decl.
10572 Returns a FUNCTION_DECL on success.
10574 If the DECLARATOR is not suitable for a function (it defines a datum
10575 instead), we return 0, which tells yyparse to report a parse error.
10577 May return void_type_node indicating that this method is actually
10578 a friend. See grokfield for more details.
10580 Came here with a `.pushlevel' .
10582 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10583 CHANGES TO CODE IN `grokfield'. */
10586 start_method (cp_decl_specifier_seq *declspecs,
10587 const cp_declarator *declarator, tree attrlist)
10589 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
10592 if (fndecl == error_mark_node)
10593 return error_mark_node;
10595 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
10597 error ("invalid member function declaration");
10598 return error_mark_node;
10602 cplus_decl_attributes (&fndecl, attrlist, 0);
10604 /* Pass friends other than inline friend functions back. */
10605 if (fndecl == void_type_node)
10608 if (DECL_IN_AGGR_P (fndecl))
10610 if (DECL_CONTEXT (fndecl)
10611 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
10612 error ("`%D' is already defined in class `%T'", fndecl,
10613 DECL_CONTEXT (fndecl));
10614 return void_type_node;
10617 check_template_shadow (fndecl);
10619 DECL_DECLARED_INLINE_P (fndecl) = 1;
10620 if (flag_default_inline)
10621 DECL_INLINE (fndecl) = 1;
10623 /* We process method specializations in finish_struct_1. */
10624 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
10626 fndecl = push_template_decl (fndecl);
10627 if (fndecl == error_mark_node)
10631 if (! DECL_FRIEND_P (fndecl))
10633 if (TREE_CHAIN (fndecl))
10635 fndecl = copy_node (fndecl);
10636 TREE_CHAIN (fndecl) = NULL_TREE;
10638 grok_special_member_properties (fndecl);
10641 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
10643 /* Make a place for the parms. */
10644 begin_scope (sk_function_parms, fndecl);
10646 DECL_IN_AGGR_P (fndecl) = 1;
10650 /* Go through the motions of finishing a function definition.
10651 We don't compile this method until after the whole class has
10654 FINISH_METHOD must return something that looks as though it
10655 came from GROKFIELD (since we are defining a method, after all).
10657 This is called after parsing the body of the function definition.
10658 STMTS is the chain of statements that makes up the function body.
10660 DECL is the ..._DECL that `start_method' provided. */
10663 finish_method (tree decl)
10665 tree fndecl = decl;
10670 if (decl == void_type_node)
10673 old_initial = DECL_INITIAL (fndecl);
10675 /* Undo the level for the parms (from start_method).
10676 This is like poplevel, but it causes nothing to be
10677 saved. Saving information here confuses symbol-table
10678 output routines. Besides, this information will
10679 be correctly output when this method is actually
10682 /* Clear out the meanings of the local variables of this level;
10683 also record in each decl which block it belongs to. */
10685 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
10687 if (DECL_NAME (link) != NULL_TREE)
10688 pop_binding (DECL_NAME (link), link);
10689 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
10690 DECL_CONTEXT (link) = NULL_TREE;
10693 poplevel (0, 0, 0);
10695 DECL_INITIAL (fndecl) = old_initial;
10697 /* We used to check if the context of FNDECL was different from
10698 current_class_type as another way to get inside here. This didn't work
10699 for String.cc in libg++. */
10700 if (DECL_FRIEND_P (fndecl))
10702 VEC_safe_push (tree, CLASSTYPE_INLINE_FRIENDS (current_class_type),
10704 decl = void_type_node;
10711 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10712 we can lay it out later, when and if its type becomes complete. */
10715 maybe_register_incomplete_var (tree var)
10717 gcc_assert (TREE_CODE (var) == VAR_DECL);
10719 /* Keep track of variables with incomplete types. */
10720 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
10721 && DECL_EXTERNAL (var))
10723 tree inner_type = TREE_TYPE (var);
10725 while (TREE_CODE (inner_type) == ARRAY_TYPE)
10726 inner_type = TREE_TYPE (inner_type);
10727 inner_type = TYPE_MAIN_VARIANT (inner_type);
10729 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
10730 /* RTTI TD entries are created while defining the type_info. */
10731 || (TYPE_LANG_SPECIFIC (inner_type)
10732 && TYPE_BEING_DEFINED (inner_type)))
10733 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
10737 /* Called when a class type (given by TYPE) is defined. If there are
10738 any existing VAR_DECLs whose type hsa been completed by this
10739 declaration, update them now. */
10742 complete_vars (tree type)
10744 tree *list = &incomplete_vars;
10746 gcc_assert (CLASS_TYPE_P (type));
10749 if (same_type_p (type, TREE_PURPOSE (*list)))
10751 tree var = TREE_VALUE (*list);
10752 /* Complete the type of the variable. The VAR_DECL itself
10753 will be laid out in expand_expr. */
10754 complete_type (TREE_TYPE (var));
10755 /* Remove this entry from the list. */
10756 *list = TREE_CHAIN (*list);
10759 list = &TREE_CHAIN (*list);
10762 /* Check for pending declarations which may have abstract type. */
10763 complete_type_check_abstract (type);
10766 /* If DECL is of a type which needs a cleanup, build that cleanup
10770 cxx_maybe_build_cleanup (tree decl)
10772 tree type = TREE_TYPE (decl);
10774 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
10776 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
10778 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
10779 && CLASSTYPE_VBASECLASSES (type));
10781 if (TREE_CODE (type) == ARRAY_TYPE)
10785 cxx_mark_addressable (decl);
10786 rval = build_unary_op (ADDR_EXPR, decl, 0);
10789 /* Optimize for space over speed here. */
10790 if (!has_vbases || flag_expensive_optimizations)
10791 flags |= LOOKUP_NONVIRTUAL;
10793 rval = build_delete (TREE_TYPE (rval), rval,
10794 sfk_complete_destructor, flags, 0);
10796 if (has_vbases && !TYPE_HAS_DESTRUCTOR (type))
10797 rval = build_compound_expr (rval, build_vbase_delete (type, decl));
10804 /* When a stmt has been parsed, this function is called. */
10811 /* DECL was originally constructed as a non-static member function,
10812 but turned out to be static. Update it accordingly. */
10815 revert_static_member_fn (tree decl)
10818 tree function = TREE_TYPE (decl);
10819 tree args = TYPE_ARG_TYPES (function);
10821 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
10822 != TYPE_UNQUALIFIED)
10823 error ("static member function `%#D' declared with type qualifiers",
10826 args = TREE_CHAIN (args);
10827 tmp = build_function_type (TREE_TYPE (function), args);
10828 tmp = build_qualified_type (tmp, cp_type_quals (function));
10829 tmp = build_exception_variant (tmp,
10830 TYPE_RAISES_EXCEPTIONS (function));
10831 TREE_TYPE (decl) = tmp;
10832 if (DECL_ARGUMENTS (decl))
10833 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
10834 DECL_STATIC_FUNCTION_P (decl) = 1;
10837 /* Initialize the variables used during compilation of a C++
10841 cxx_push_function_context (struct function * f)
10843 struct language_function *p = GGC_CNEW (struct language_function);
10846 /* Whenever we start a new function, we destroy temporaries in the
10848 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
10854 if (DECL_SAVED_FUNCTION_DATA (fn))
10856 /* If we already parsed this function, and we're just expanding it
10857 now, restore saved state. */
10858 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
10860 /* We don't need the saved data anymore. Unless this is an inline
10861 function; we need the named return value info for
10862 declare_return_variable. */
10863 if (! DECL_INLINE (fn))
10864 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
10869 /* Free the language-specific parts of F, now that we've finished
10870 compiling the function. */
10873 cxx_pop_function_context (struct function * f)
10878 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
10879 one of the language-independent trees. */
10881 enum cp_tree_node_structure_enum
10882 cp_tree_node_structure (union lang_tree_node * t)
10884 switch (TREE_CODE (&t->generic))
10886 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
10887 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
10888 case OVERLOAD: return TS_CP_OVERLOAD;
10889 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
10890 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
10891 case PTRMEM_CST: return TS_CP_PTRMEM;
10892 case BASELINK: return TS_CP_BASELINK;
10893 default: return TS_CP_GENERIC;
10897 /* Build the void_list_node (void_type_node having been created). */
10899 build_void_list_node (void)
10901 tree t = build_tree_list (NULL_TREE, void_type_node);
10906 cp_missing_noreturn_ok_p (tree decl)
10908 /* A missing noreturn is ok for the `main' function. */
10909 return DECL_MAIN_P (decl);
10912 /* Return the COMDAT group into which DECL should be placed. */
10915 cxx_comdat_group (tree decl)
10919 /* Virtual tables, construction virtual tables, and virtual table
10920 tables all go in a single COMDAT group, named after the primary
10922 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
10923 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
10924 /* For all other DECLs, the COMDAT group is the mangled name of the
10925 declaration itself. */
10927 name = DECL_ASSEMBLER_NAME (decl);
10929 return IDENTIFIER_POINTER (name);
10932 #include "gt-cp-decl.h"