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, int,
71 enum built_in_class, const char *,
73 static tree build_library_fn_1 (tree, enum tree_code, tree);
74 static int member_function_or_else (tree, tree, enum overload_flags);
75 static void bad_specifiers (tree, const char *, int, int, int, int,
77 static void check_for_uninitialized_const_var (tree);
78 static hashval_t typename_hash (const void *);
79 static int typename_compare (const void *, const void *);
80 static tree local_variable_p_walkfn (tree *, int *, void *);
81 static tree record_builtin_java_type (const char *, int);
82 static const char *tag_name (enum tag_types code);
83 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
84 static int walk_globals_r (tree, void*);
85 static int walk_vtables_r (tree, void*);
86 static tree make_label_decl (tree, int);
87 static void use_label (tree);
88 static void check_previous_goto_1 (tree, struct cp_binding_level *, tree,
90 static void check_previous_goto (struct named_label_use_list *);
91 static void check_switch_goto (struct cp_binding_level *);
92 static void check_previous_gotos (tree);
93 static void pop_label (tree, tree);
94 static void pop_labels (tree);
95 static void maybe_deduce_size_from_array_init (tree, tree);
96 static void layout_var_decl (tree);
97 static void maybe_commonize_var (tree);
98 static tree check_initializer (tree, tree, int, tree *);
99 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
100 static void save_function_data (tree);
101 static void check_function_type (tree, tree);
102 static void begin_constructor_body (void);
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 /* Exit a binding level.
407 Pop the level off, and restore the state of the identifier-decl mappings
408 that were in effect when this level was entered.
410 If KEEP == 1, this level had explicit declarations, so
411 and create a "block" (a BLOCK node) for the level
412 to record its declarations and subblocks for symbol table output.
414 If FUNCTIONBODY is nonzero, this level is the body of a function,
415 so create a block as if KEEP were set and also clear out all
418 If REVERSE is nonzero, reverse the order of decls before putting
419 them into the BLOCK. */
422 poplevel (int keep, int reverse, int functionbody)
425 /* The chain of decls was accumulated in reverse order.
426 Put it into forward order, just for cleanliness. */
428 int tmp = functionbody;
429 int real_functionbody;
433 int leaving_for_scope;
436 timevar_push (TV_NAME_LOOKUP);
441 my_friendly_assert (current_binding_level->kind != sk_class, 19990916);
443 real_functionbody = (current_binding_level->kind == sk_cleanup
444 ? ((functionbody = 0), tmp) : functionbody);
445 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
447 my_friendly_assert (VEC_length(cp_class_binding,
448 current_binding_level->class_shadowed) == 0,
451 /* We used to use KEEP == 2 to indicate that the new block should go
452 at the beginning of the list of blocks at this binding level,
453 rather than the end. This hack is no longer used. */
454 my_friendly_assert (keep == 0 || keep == 1, 0);
456 if (current_binding_level->keep)
459 /* Any uses of undefined labels, and any defined labels, now operate
460 under constraints of next binding contour. */
461 if (cfun && !functionbody)
463 struct cp_binding_level *level_chain;
464 level_chain = current_binding_level->level_chain;
467 struct named_label_use_list *uses;
468 struct named_label_list *labels;
469 for (labels = named_labels; labels; labels = labels->next)
470 if (labels->binding_level == current_binding_level)
473 if (current_binding_level->kind == sk_try)
474 labels->in_try_scope = 1;
475 if (current_binding_level->kind == sk_catch)
476 labels->in_catch_scope = 1;
477 for (decl = labels->names_in_scope; decl;
478 decl = TREE_CHAIN (decl))
479 if (decl_jump_unsafe (decl))
480 labels->bad_decls = tree_cons (NULL_TREE, decl,
482 labels->binding_level = level_chain;
483 labels->names_in_scope = level_chain->names;
486 for (uses = named_label_uses; uses; uses = uses->next)
487 if (uses->binding_level == current_binding_level)
489 uses->binding_level = level_chain;
490 uses->names_in_scope = level_chain->names;
495 /* Get the decls in the order they were written.
496 Usually current_binding_level->names is in reverse order.
497 But parameter decls were previously put in forward order. */
500 current_binding_level->names
501 = decls = nreverse (current_binding_level->names);
503 decls = current_binding_level->names;
505 /* If there were any declarations or structure tags in that level,
506 or if this level is a function body,
507 create a BLOCK to record them for the life of this function. */
509 if (keep == 1 || functionbody)
510 block = make_node (BLOCK);
511 if (block != NULL_TREE)
513 BLOCK_VARS (block) = decls;
514 BLOCK_SUBBLOCKS (block) = subblocks;
517 /* In each subblock, record that this is its superior. */
519 for (link = subblocks; link; link = TREE_CHAIN (link))
520 BLOCK_SUPERCONTEXT (link) = block;
522 /* We still support the old for-scope rules, whereby the variables
523 in a for-init statement were in scope after the for-statement
524 ended. We only use the new rules if flag_new_for_scope is
527 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
529 /* Before we remove the declarations first check for unused variables. */
530 if (warn_unused_variable
531 && !processing_template_decl)
532 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
533 if (TREE_CODE (decl) == VAR_DECL
534 && ! TREE_USED (decl)
535 && ! DECL_IN_SYSTEM_HEADER (decl)
536 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
537 warning ("%Junused variable '%D'", decl, decl);
539 /* Remove declarations for all the DECLs in this level. */
540 for (link = decls; link; link = TREE_CHAIN (link))
542 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
545 tree name = DECL_NAME (link);
549 ob = outer_binding (name,
550 IDENTIFIER_BINDING (name),
553 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
555 ns_binding = NULL_TREE;
557 if (ob && ob->scope == current_binding_level->level_chain)
558 /* We have something like:
563 and we are leaving the `for' scope. There's no reason to
564 keep the binding of the inner `i' in this case. */
565 pop_binding (name, link);
566 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
567 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
568 /* Here, we have something like:
576 We must pop the for-scope binding so we know what's a
577 type and what isn't. */
578 pop_binding (name, link);
581 /* Mark this VAR_DECL as dead so that we can tell we left it
582 there only for backward compatibility. */
583 DECL_DEAD_FOR_LOCAL (link) = 1;
585 /* Keep track of what should have happened when we
586 popped the binding. */
588 DECL_SHADOWED_FOR_VAR (link) = ob->value;
590 /* Add it to the list of dead variables in the next
591 outermost binding to that we can remove these when we
592 leave that binding. */
593 current_binding_level->level_chain->dead_vars_from_for
594 = tree_cons (NULL_TREE, link,
595 current_binding_level->level_chain->
598 /* Although we don't pop the cxx_binding, we do clear
599 its SCOPE since the scope is going away now. */
600 IDENTIFIER_BINDING (name)->scope
601 = current_binding_level->level_chain;
606 /* Remove the binding. */
609 if (TREE_CODE (decl) == TREE_LIST)
610 decl = TREE_VALUE (decl);
613 pop_binding (DECL_NAME (decl), decl);
614 else if (TREE_CODE (decl) == OVERLOAD)
615 pop_binding (DECL_NAME (OVL_FUNCTION (decl)), decl);
621 /* Remove declarations for any `for' variables from inner scopes
622 that we kept around. */
623 for (link = current_binding_level->dead_vars_from_for;
624 link; link = TREE_CHAIN (link))
625 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
627 /* Restore the IDENTIFIER_TYPE_VALUEs. */
628 for (link = current_binding_level->type_shadowed;
629 link; link = TREE_CHAIN (link))
630 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
632 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
633 for (link = current_binding_level->shadowed_labels;
635 link = TREE_CHAIN (link))
636 pop_label (TREE_VALUE (link), TREE_PURPOSE (link));
638 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
639 list if a `using' declaration put them there. The debugging
640 back-ends won't understand OVERLOAD, so we remove them here.
641 Because the BLOCK_VARS are (temporarily) shared with
642 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
643 popped all the bindings. */
648 for (d = &BLOCK_VARS (block); *d; )
650 if (TREE_CODE (*d) == TREE_LIST)
651 *d = TREE_CHAIN (*d);
653 d = &TREE_CHAIN (*d);
657 /* If the level being exited is the top level of a function,
658 check over all the labels. */
661 /* Since this is the top level block of a function, the vars are
662 the function's parameters. Don't leave them in the BLOCK
663 because they are found in the FUNCTION_DECL instead. */
664 BLOCK_VARS (block) = 0;
668 kind = current_binding_level->kind;
669 if (kind == sk_cleanup)
673 /* If this is a temporary binding created for a cleanup, then we'll
674 have pushed a statement list level. Pop that, create a new
675 BIND_EXPR for the block, and insert it into the stream. */
676 stmt = pop_stmt_list (current_binding_level->statement_list);
677 stmt = c_build_bind_expr (block, stmt);
683 DECL_INITIAL (current_function_decl) = block;
685 current_binding_level->blocks
686 = chainon (current_binding_level->blocks, block);
688 /* If we did not make a block for the level just exited,
689 any blocks made for inner levels
690 (since they cannot be recorded as subblocks in that level)
691 must be carried forward so they will later become subblocks
692 of something else. */
694 current_binding_level->blocks
695 = chainon (current_binding_level->blocks, subblocks);
697 /* Each and every BLOCK node created here in `poplevel' is important
698 (e.g. for proper debugging information) so if we created one
699 earlier, mark it as "used". */
701 TREE_USED (block) = 1;
703 /* All temporary bindings created for cleanups are popped silently. */
704 if (kind == sk_cleanup)
707 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
710 /* Delete the node BLOCK from the current binding level.
711 This is used for the block inside a stmt expr ({...})
712 so that the block can be reinserted where appropriate. */
715 delete_block (tree block)
718 if (current_binding_level->blocks == block)
719 current_binding_level->blocks = TREE_CHAIN (block);
720 for (t = current_binding_level->blocks; t;)
722 if (TREE_CHAIN (t) == block)
723 TREE_CHAIN (t) = TREE_CHAIN (block);
727 TREE_CHAIN (block) = NULL_TREE;
728 /* Clear TREE_USED which is always set by poplevel.
729 The flag is set again if insert_block is called. */
730 TREE_USED (block) = 0;
733 /* Insert BLOCK at the end of the list of subblocks of the
734 current binding level. This is used when a BIND_EXPR is expanded,
735 to handle the BLOCK node inside the BIND_EXPR. */
738 insert_block (tree block)
740 TREE_USED (block) = 1;
741 current_binding_level->blocks
742 = chainon (current_binding_level->blocks, block);
745 /* Returns nonzero if T is a virtual function table. */
748 vtable_decl_p (tree t, void* data ATTRIBUTE_UNUSED )
750 return (TREE_CODE (t) == VAR_DECL && DECL_VIRTUAL_P (t));
753 /* Returns nonzero if T is a TYPE_DECL for a type with virtual
757 vtype_decl_p (tree t, void *data ATTRIBUTE_UNUSED )
759 return (TREE_CODE (t) == TYPE_DECL
760 && TREE_CODE (TREE_TYPE (t)) == RECORD_TYPE
761 && TYPE_POLYMORPHIC_P (TREE_TYPE (t)));
764 struct walk_globals_data {
770 /* Walk the vtable declarations in NAMESPACE. Whenever one is found
771 for which P returns nonzero, call F with its address. If any call
772 to F returns a nonzero value, return a nonzero value. */
775 walk_vtables_r (tree namespace, void* data)
777 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
778 walk_globals_fn f = wgd->f;
780 tree decl = NAMESPACE_LEVEL (namespace)->vtables;
783 for (; decl ; decl = TREE_CHAIN (decl))
784 result |= (*f) (&decl, d);
789 /* Walk the vtable declarations. Whenever one is found for which P
790 returns nonzero, call F with its address. If any call to F
791 returns a nonzero value, return a nonzero value. */
793 walk_vtables (walk_globals_pred p, walk_globals_fn f, void *data)
795 struct walk_globals_data wgd;
800 return walk_namespaces (walk_vtables_r, &wgd);
803 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
804 itself, calling F for each. The DATA is passed to F as well. */
807 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
810 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
812 result |= (*f) (namespace, data);
814 for (; current; current = TREE_CHAIN (current))
815 result |= walk_namespaces_r (current, f, data);
820 /* Walk all the namespaces, calling F for each. The DATA is passed to
824 walk_namespaces (walk_namespaces_fn f, void* data)
826 return walk_namespaces_r (global_namespace, f, data);
829 /* Walk the global declarations in NAMESPACE. Whenever one is found
830 for which P returns nonzero, call F with its address. If any call
831 to F returns a nonzero value, return a nonzero value. */
834 walk_globals_r (tree namespace, void* data)
836 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
837 walk_globals_pred p = wgd->p;
838 walk_globals_fn f = wgd->f;
843 t = &NAMESPACE_LEVEL (namespace)->names;
850 result |= (*f) (t, d);
852 /* If F changed *T, then *T still points at the next item to
855 t = &TREE_CHAIN (*t);
861 /* Walk the global declarations. Whenever one is found for which P
862 returns true, call F with its address. If any call to F
863 returns true, return true. */
866 walk_globals (walk_globals_pred p, walk_globals_fn f, void *data)
868 struct walk_globals_data wgd;
873 return walk_namespaces (walk_globals_r, &wgd);
876 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
877 DATA is non-NULL, this is the last time we will call
878 wrapup_global_declarations for this NAMESPACE. */
881 wrapup_globals_for_namespace (tree namespace, void* data)
883 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
884 varray_type statics = level->static_decls;
885 tree *vec = &VARRAY_TREE (statics, 0);
886 int len = VARRAY_ACTIVE_SIZE (statics);
887 int last_time = (data != 0);
891 check_global_declarations (vec, len);
895 /* Write out any globals that need to be output. */
896 return wrapup_global_declarations (vec, len);
900 /* In C++, you don't have to write `struct S' to refer to `S'; you
901 can just use `S'. We accomplish this by creating a TYPE_DECL as
902 if the user had written `typedef struct S S'. Create and return
903 the TYPE_DECL for TYPE. */
906 create_implicit_typedef (tree name, tree type)
910 decl = build_decl (TYPE_DECL, name, type);
911 DECL_ARTIFICIAL (decl) = 1;
912 /* There are other implicit type declarations, like the one *within*
913 a class that allows you to write `S::S'. We must distinguish
915 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
916 TYPE_NAME (type) = decl;
921 /* Remember a local name for name-mangling purposes. */
924 push_local_name (tree decl)
929 timevar_push (TV_NAME_LOOKUP);
931 VARRAY_TREE_INIT (local_names, 8, "local_names");
933 name = DECL_NAME (decl);
935 nelts = VARRAY_ACTIVE_SIZE (local_names);
936 for (i = 0; i < nelts; i++)
938 t = VARRAY_TREE (local_names, i);
939 if (DECL_NAME (t) == name)
941 if (!DECL_LANG_SPECIFIC (decl))
942 retrofit_lang_decl (decl);
943 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
944 if (DECL_LANG_SPECIFIC (t))
945 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
947 DECL_DISCRIMINATOR (decl) = 1;
949 VARRAY_TREE (local_names, i) = decl;
950 timevar_pop (TV_NAME_LOOKUP);
955 VARRAY_PUSH_TREE (local_names, decl);
956 timevar_pop (TV_NAME_LOOKUP);
959 /* Subroutine of duplicate_decls: return truthvalue of whether
960 or not types of these decls match.
962 For C++, we must compare the parameter list so that `int' can match
963 `int&' in a parameter position, but `int&' is not confused with
967 decls_match (tree newdecl, tree olddecl)
971 if (newdecl == olddecl)
974 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
975 /* If the two DECLs are not even the same kind of thing, we're not
976 interested in their types. */
979 if (TREE_CODE (newdecl) == FUNCTION_DECL)
981 tree f1 = TREE_TYPE (newdecl);
982 tree f2 = TREE_TYPE (olddecl);
983 tree p1 = TYPE_ARG_TYPES (f1);
984 tree p2 = TYPE_ARG_TYPES (f2);
986 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
987 && ! (DECL_EXTERN_C_P (newdecl)
988 && DECL_EXTERN_C_P (olddecl)))
991 if (TREE_CODE (f1) != TREE_CODE (f2))
994 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
996 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
997 && (DECL_BUILT_IN (olddecl)
998 #ifndef NO_IMPLICIT_EXTERN_C
999 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
1000 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
1004 types_match = self_promoting_args_p (p1);
1005 if (p1 == void_list_node)
1006 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1008 #ifndef NO_IMPLICIT_EXTERN_C
1009 else if (p1 == NULL_TREE
1010 && (DECL_EXTERN_C_P (olddecl)
1011 && DECL_IN_SYSTEM_HEADER (olddecl)
1012 && !DECL_CLASS_SCOPE_P (olddecl))
1013 && (DECL_EXTERN_C_P (newdecl)
1014 && DECL_IN_SYSTEM_HEADER (newdecl)
1015 && !DECL_CLASS_SCOPE_P (newdecl)))
1017 types_match = self_promoting_args_p (p2);
1018 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1022 types_match = compparms (p1, p2);
1027 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1029 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1030 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1033 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1034 DECL_TEMPLATE_PARMS (olddecl)))
1037 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1038 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1039 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1041 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1042 DECL_TEMPLATE_RESULT (newdecl));
1046 if (TREE_TYPE (newdecl) == error_mark_node)
1047 types_match = TREE_TYPE (olddecl) == error_mark_node;
1048 else if (TREE_TYPE (olddecl) == NULL_TREE)
1049 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1050 else if (TREE_TYPE (newdecl) == NULL_TREE)
1053 types_match = comptypes (TREE_TYPE (newdecl),
1054 TREE_TYPE (olddecl),
1055 COMPARE_REDECLARATION);
1061 /* If NEWDECL is `static' and an `extern' was seen previously,
1062 warn about it. OLDDECL is the previous declaration.
1064 Note that this does not apply to the C++ case of declaring
1065 a variable `extern const' and then later `const'.
1067 Don't complain about built-in functions, since they are beyond
1068 the user's control. */
1071 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1075 if (TREE_CODE (newdecl) == TYPE_DECL
1076 || TREE_CODE (newdecl) == TEMPLATE_DECL
1077 || TREE_CODE (newdecl) == CONST_DECL
1078 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1081 /* Don't get confused by static member functions; that's a different
1083 if (TREE_CODE (newdecl) == FUNCTION_DECL
1084 && DECL_STATIC_FUNCTION_P (newdecl))
1087 /* If the old declaration was `static', or the new one isn't, then
1088 then everything is OK. */
1089 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1092 /* It's OK to declare a builtin function as `static'. */
1093 if (TREE_CODE (olddecl) == FUNCTION_DECL
1094 && DECL_ARTIFICIAL (olddecl))
1097 name = DECL_ASSEMBLER_NAME (newdecl);
1098 pedwarn ("`%D' was declared `extern' and later `static'", newdecl);
1099 cp_pedwarn_at ("previous declaration of `%D'", olddecl);
1102 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1103 If the redeclaration is invalid, a diagnostic is issued, and the
1104 error_mark_node is returned. Otherwise, OLDDECL is returned.
1106 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1110 duplicate_decls (tree newdecl, tree olddecl)
1112 unsigned olddecl_uid = DECL_UID (olddecl);
1113 int olddecl_friend = 0, types_match = 0;
1114 int new_defines_function = 0;
1116 if (newdecl == olddecl)
1119 types_match = decls_match (newdecl, olddecl);
1121 /* If either the type of the new decl or the type of the old decl is an
1122 error_mark_node, then that implies that we have already issued an
1123 error (earlier) for some bogus type specification, and in that case,
1124 it is rather pointless to harass the user with yet more error message
1125 about the same declaration, so just pretend the types match here. */
1126 if (TREE_TYPE (newdecl) == error_mark_node
1127 || TREE_TYPE (olddecl) == error_mark_node)
1130 if (DECL_P (olddecl)
1131 && TREE_CODE (newdecl) == FUNCTION_DECL
1132 && TREE_CODE (olddecl) == FUNCTION_DECL
1133 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1135 if (DECL_DECLARED_INLINE_P (newdecl)
1136 && DECL_UNINLINABLE (newdecl)
1137 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1138 /* Already warned elsewhere. */;
1139 else if (DECL_DECLARED_INLINE_P (olddecl)
1140 && DECL_UNINLINABLE (olddecl)
1141 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1142 /* Already warned. */;
1143 else if (DECL_DECLARED_INLINE_P (newdecl)
1144 && DECL_UNINLINABLE (olddecl)
1145 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1147 warning ("%Jfunction '%D' redeclared as inline", newdecl, newdecl);
1148 warning ("%Jprevious declaration of '%D' with attribute noinline",
1151 else if (DECL_DECLARED_INLINE_P (olddecl)
1152 && DECL_UNINLINABLE (newdecl)
1153 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1155 warning ("%Jfunction '%D' redeclared with attribute noinline",
1157 warning ("%Jprevious declaration of '%D' was inline",
1162 /* Check for redeclaration and other discrepancies. */
1163 if (TREE_CODE (olddecl) == FUNCTION_DECL
1164 && DECL_ARTIFICIAL (olddecl))
1166 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1168 /* Avoid warnings redeclaring anticipated built-ins. */
1169 if (DECL_ANTICIPATED (olddecl))
1172 /* If you declare a built-in or predefined function name as static,
1173 the old definition is overridden, but optionally warn this was a
1174 bad choice of name. */
1175 if (! TREE_PUBLIC (newdecl))
1178 warning ("shadowing %s function `%#D'",
1179 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1181 /* Discard the old built-in function. */
1184 /* If the built-in is not ansi, then programs can override
1185 it even globally without an error. */
1186 else if (! DECL_BUILT_IN (olddecl))
1187 warning ("library function `%#D' redeclared as non-function `%#D'",
1191 error ("declaration of `%#D'", newdecl);
1192 error ("conflicts with built-in declaration `%#D'",
1197 else if (!types_match)
1199 /* Avoid warnings redeclaring anticipated built-ins. */
1200 if (DECL_ANTICIPATED (olddecl))
1202 /* Deal with fileptr_type_node. FILE type is not known
1203 at the time we create the builtins. */
1206 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1207 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1209 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1212 else if (TREE_VALUE (t2) == fileptr_type_node)
1214 tree t = TREE_VALUE (t1);
1216 if (TREE_CODE (t) == POINTER_TYPE
1217 && TYPE_NAME (TREE_TYPE (t))
1218 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1219 == get_identifier ("FILE")
1220 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1222 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1224 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1225 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1226 types_match = decls_match (newdecl, olddecl);
1228 return duplicate_decls (newdecl, olddecl);
1229 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1232 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1235 else if ((DECL_EXTERN_C_P (newdecl)
1236 && DECL_EXTERN_C_P (olddecl))
1237 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1238 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1240 /* A near match; override the builtin. */
1242 if (TREE_PUBLIC (newdecl))
1244 warning ("new declaration `%#D'", newdecl);
1245 warning ("ambiguates built-in declaration `%#D'",
1248 else if (warn_shadow)
1249 warning ("shadowing %s function `%#D'",
1250 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1254 /* Discard the old built-in function. */
1257 /* Replace the old RTL to avoid problems with inlining. */
1258 COPY_DECL_RTL (newdecl, olddecl);
1260 /* Even if the types match, prefer the new declarations type
1261 for anticipated built-ins, for exception lists, etc... */
1262 else if (DECL_ANTICIPATED (olddecl))
1264 tree type = TREE_TYPE (newdecl);
1265 tree attribs = (*targetm.merge_type_attributes)
1266 (TREE_TYPE (olddecl), type);
1268 type = cp_build_type_attribute_variant (type, attribs);
1269 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1272 /* Whether or not the builtin can throw exceptions has no
1273 bearing on this declarator. */
1274 TREE_NOTHROW (olddecl) = 0;
1276 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1278 /* If a builtin function is redeclared as `static', merge
1279 the declarations, but make the original one static. */
1280 DECL_THIS_STATIC (olddecl) = 1;
1281 TREE_PUBLIC (olddecl) = 0;
1283 /* Make the old declaration consistent with the new one so
1284 that all remnants of the builtin-ness of this function
1285 will be banished. */
1286 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1287 COPY_DECL_RTL (newdecl, olddecl);
1290 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1292 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1293 && TREE_CODE (newdecl) != TYPE_DECL
1294 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1295 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1296 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1297 && TREE_CODE (olddecl) != TYPE_DECL
1298 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1299 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1302 /* We do nothing special here, because C++ does such nasty
1303 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1304 get shadowed, and know that if we need to find a TYPE_DECL
1305 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1306 slot of the identifier. */
1310 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1311 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1312 || (TREE_CODE (olddecl) == FUNCTION_DECL
1313 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1316 error ("`%#D' redeclared as different kind of symbol", newdecl);
1317 if (TREE_CODE (olddecl) == TREE_LIST)
1318 olddecl = TREE_VALUE (olddecl);
1319 cp_error_at ("previous declaration of `%#D'", olddecl);
1321 return error_mark_node;
1323 else if (!types_match)
1325 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1326 /* These are certainly not duplicate declarations; they're
1327 from different scopes. */
1330 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1332 /* The name of a class template may not be declared to refer to
1333 any other template, class, function, object, namespace, value,
1334 or type in the same scope. */
1335 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1336 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1338 error ("declaration of template `%#D'", newdecl);
1339 cp_error_at ("conflicts with previous declaration `%#D'",
1342 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1343 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1344 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1345 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1346 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1347 DECL_TEMPLATE_PARMS (olddecl))
1348 /* Template functions can be disambiguated by
1350 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1351 TREE_TYPE (TREE_TYPE (olddecl))))
1353 error ("new declaration `%#D'", newdecl);
1354 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
1358 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1360 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1362 error ("declaration of C function `%#D' conflicts with",
1364 cp_error_at ("previous declaration `%#D' here", olddecl);
1366 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1367 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1369 error ("new declaration `%#D'", newdecl);
1370 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
1377 error ("conflicting declaration '%#D'", newdecl);
1378 cp_error_at ("'%D' has a previous declaration as `%#D'",
1383 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1384 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1385 && (!DECL_TEMPLATE_INFO (newdecl)
1386 || (DECL_TI_TEMPLATE (newdecl)
1387 != DECL_TI_TEMPLATE (olddecl))))
1388 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1389 && (!DECL_TEMPLATE_INFO (olddecl)
1390 || (DECL_TI_TEMPLATE (olddecl)
1391 != DECL_TI_TEMPLATE (newdecl))))))
1392 /* It's OK to have a template specialization and a non-template
1393 with the same type, or to have specializations of two
1394 different templates with the same type. Note that if one is a
1395 specialization, and the other is an instantiation of the same
1396 template, that we do not exit at this point. That situation
1397 can occur if we instantiate a template class, and then
1398 specialize one of its methods. This situation is valid, but
1399 the declarations must be merged in the usual way. */
1401 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1402 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1403 && !DECL_USE_TEMPLATE (newdecl))
1404 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1405 && !DECL_USE_TEMPLATE (olddecl))))
1406 /* One of the declarations is a template instantiation, and the
1407 other is not a template at all. That's OK. */
1409 else if (TREE_CODE (newdecl) == NAMESPACE_DECL
1410 && DECL_NAMESPACE_ALIAS (newdecl)
1411 && DECL_NAMESPACE_ALIAS (newdecl) == DECL_NAMESPACE_ALIAS (olddecl))
1412 /* In [namespace.alias] we have:
1414 In a declarative region, a namespace-alias-definition can be
1415 used to redefine a namespace-alias declared in that declarative
1416 region to refer only to the namespace to which it already
1419 Therefore, if we encounter a second alias directive for the same
1420 alias, we can just ignore the second directive. */
1424 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1427 error (errmsg, newdecl);
1428 if (DECL_NAME (olddecl) != NULL_TREE)
1429 cp_error_at ((DECL_INITIAL (olddecl)
1430 && namespace_bindings_p ())
1431 ? "`%#D' previously defined here"
1432 : "`%#D' previously declared here", olddecl);
1433 return error_mark_node;
1435 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1436 && DECL_INITIAL (olddecl) != NULL_TREE
1437 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1438 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1440 /* Prototype decl follows defn w/o prototype. */
1441 cp_warning_at ("prototype for `%#D'", newdecl);
1442 warning ("%Jfollows non-prototype definition here", olddecl);
1444 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1445 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1447 /* extern "C" int foo ();
1448 int foo () { bar (); }
1450 if (current_lang_depth () == 0)
1451 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1454 cp_error_at ("previous declaration of `%#D' with %L linkage",
1455 olddecl, DECL_LANGUAGE (olddecl));
1456 error ("conflicts with new declaration with %L linkage",
1457 DECL_LANGUAGE (newdecl));
1461 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1463 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1465 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1466 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1469 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1470 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1472 for (; t1 && t1 != void_list_node;
1473 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1474 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1476 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1479 pedwarn ("default argument given for parameter %d of `%#D'",
1481 cp_pedwarn_at ("after previous specification in `%#D'",
1486 error ("default argument given for parameter %d of `%#D'",
1488 cp_error_at ("after previous specification in `%#D'",
1493 if (DECL_DECLARED_INLINE_P (newdecl)
1494 && ! DECL_DECLARED_INLINE_P (olddecl)
1495 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1497 warning ("`%#D' was used before it was declared inline", newdecl);
1498 warning ("%Jprevious non-inline declaration here", olddecl);
1503 /* Do not merge an implicit typedef with an explicit one. In:
1507 typedef class A A __attribute__ ((foo));
1509 the attribute should apply only to the typedef. */
1510 if (TREE_CODE (olddecl) == TYPE_DECL
1511 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1512 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1515 /* If new decl is `static' and an `extern' was seen previously,
1517 warn_extern_redeclared_static (newdecl, olddecl);
1519 /* We have committed to returning 1 at this point. */
1520 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1522 /* Now that functions must hold information normally held
1523 by field decls, there is extra work to do so that
1524 declaration information does not get destroyed during
1526 if (DECL_VINDEX (olddecl))
1527 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1528 if (DECL_CONTEXT (olddecl))
1529 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1530 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1531 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1532 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1533 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1534 DECL_NEEDS_FINAL_OVERRIDER_P (newdecl) |= DECL_NEEDS_FINAL_OVERRIDER_P (olddecl);
1535 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1536 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1537 SET_OVERLOADED_OPERATOR_CODE
1538 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1539 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1541 /* Optionally warn about more than one declaration for the same
1542 name, but don't warn about a function declaration followed by a
1544 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1545 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1546 /* Don't warn about extern decl followed by definition. */
1547 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1548 /* Don't warn about friends, let add_friend take care of it. */
1549 && ! (DECL_FRIEND_P (newdecl) || DECL_FRIEND_P (olddecl)))
1551 warning ("redundant redeclaration of `%D' in same scope", newdecl);
1552 cp_warning_at ("previous declaration of `%D'", olddecl);
1556 /* Deal with C++: must preserve virtual function table size. */
1557 if (TREE_CODE (olddecl) == TYPE_DECL)
1559 tree newtype = TREE_TYPE (newdecl);
1560 tree oldtype = TREE_TYPE (olddecl);
1562 if (newtype != error_mark_node && oldtype != error_mark_node
1563 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1564 CLASSTYPE_FRIEND_CLASSES (newtype)
1565 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1567 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1570 /* Copy all the DECL_... slots specified in the new decl
1571 except for any that we copy here from the old type. */
1572 DECL_ATTRIBUTES (newdecl)
1573 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1575 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1577 TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
1578 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1579 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1580 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1582 /* If the new declaration is a definition, update the file and
1583 line information on the declaration. */
1584 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)) == NULL_TREE
1585 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl)) != NULL_TREE)
1587 DECL_SOURCE_LOCATION (olddecl)
1588 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl))
1589 = DECL_SOURCE_LOCATION (newdecl);
1590 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1591 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl))
1592 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl));
1595 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1597 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl))
1598 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl));
1599 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl))
1600 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl));
1608 /* Automatically handles default parameters. */
1609 tree oldtype = TREE_TYPE (olddecl);
1612 /* Merge the data types specified in the two decls. */
1613 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1615 /* If merge_types produces a non-typedef type, just use the old type. */
1616 if (TREE_CODE (newdecl) == TYPE_DECL
1617 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1620 if (TREE_CODE (newdecl) == VAR_DECL)
1622 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1623 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1624 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1625 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1628 /* Do this after calling `merge_types' so that default
1629 parameters don't confuse us. */
1630 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1631 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
1632 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
1634 TREE_TYPE (newdecl) = build_exception_variant (newtype,
1635 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
1636 TREE_TYPE (olddecl) = build_exception_variant (newtype,
1637 TYPE_RAISES_EXCEPTIONS (oldtype));
1639 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
1640 && ! DECL_IS_BUILTIN (olddecl)
1642 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
1643 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
1645 error ("declaration of `%F' throws different exceptions",
1647 cp_error_at ("than previous declaration `%F'", olddecl);
1650 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1652 /* Lay the type out, unless already done. */
1653 if (! same_type_p (newtype, oldtype)
1654 && TREE_TYPE (newdecl) != error_mark_node
1655 && !(processing_template_decl && uses_template_parms (newdecl)))
1656 layout_type (TREE_TYPE (newdecl));
1658 if ((TREE_CODE (newdecl) == VAR_DECL
1659 || TREE_CODE (newdecl) == PARM_DECL
1660 || TREE_CODE (newdecl) == RESULT_DECL
1661 || TREE_CODE (newdecl) == FIELD_DECL
1662 || TREE_CODE (newdecl) == TYPE_DECL)
1663 && !(processing_template_decl && uses_template_parms (newdecl)))
1664 layout_decl (newdecl, 0);
1666 /* Merge the type qualifiers. */
1667 if (TREE_READONLY (newdecl))
1668 TREE_READONLY (olddecl) = 1;
1669 if (TREE_THIS_VOLATILE (newdecl))
1670 TREE_THIS_VOLATILE (olddecl) = 1;
1672 /* Merge the initialization information. */
1673 if (DECL_INITIAL (newdecl) == NULL_TREE
1674 && DECL_INITIAL (olddecl) != NULL_TREE)
1676 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1677 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1678 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1679 && DECL_LANG_SPECIFIC (newdecl)
1680 && DECL_LANG_SPECIFIC (olddecl))
1682 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1683 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1687 /* Merge the section attribute.
1688 We want to issue an error if the sections conflict but that must be
1689 done later in decl_attributes since we are called before attributes
1691 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1692 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1694 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1696 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1697 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1698 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1699 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1700 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1701 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1702 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1703 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1704 /* Keep the old RTL. */
1705 COPY_DECL_RTL (olddecl, newdecl);
1707 else if (TREE_CODE (newdecl) == VAR_DECL
1708 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1710 /* Keep the old RTL. We cannot keep the old RTL if the old
1711 declaration was for an incomplete object and the new
1712 declaration is not since many attributes of the RTL will
1714 COPY_DECL_RTL (olddecl, newdecl);
1717 /* If cannot merge, then use the new type and qualifiers,
1718 and don't preserve the old rtl. */
1721 /* Clean out any memory we had of the old declaration. */
1722 tree oldstatic = value_member (olddecl, static_aggregates);
1724 TREE_VALUE (oldstatic) = error_mark_node;
1726 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1727 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1728 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1729 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1732 /* Merge the storage class information. */
1733 merge_weak (newdecl, olddecl);
1735 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1736 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1737 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1738 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1739 if (! DECL_EXTERNAL (olddecl))
1740 DECL_EXTERNAL (newdecl) = 0;
1742 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1744 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1745 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1746 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1747 DECL_TEMPLATE_INSTANTIATED (newdecl)
1748 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1749 /* Don't really know how much of the language-specific
1750 values we should copy from old to new. */
1751 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1752 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1753 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1754 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1755 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1756 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1757 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1758 olddecl_friend = DECL_FRIEND_P (olddecl);
1760 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1761 if (TREE_CODE (newdecl) == FUNCTION_DECL
1762 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1764 DECL_BEFRIENDING_CLASSES (newdecl)
1765 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1766 DECL_BEFRIENDING_CLASSES (olddecl));
1767 /* DECL_THUNKS is only valid for virtual functions,
1768 otherwise it is a DECL_FRIEND_CONTEXT. */
1769 if (DECL_VIRTUAL_P (newdecl))
1770 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1774 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1776 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1777 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1779 /* If newdecl is not a specialization, then it is not a
1780 template-related function at all. And that means that we
1781 should have exited above, returning 0. */
1782 my_friendly_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl),
1785 if (TREE_USED (olddecl))
1786 /* From [temp.expl.spec]:
1788 If a template, a member template or the member of a class
1789 template is explicitly specialized then that
1790 specialization shall be declared before the first use of
1791 that specialization that would cause an implicit
1792 instantiation to take place, in every translation unit in
1793 which such a use occurs. */
1794 error ("explicit specialization of %D after first use",
1797 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1799 /* [temp.expl.spec/14] We don't inline explicit specialization
1800 just because the primary template says so. */
1804 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1805 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1807 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1809 /* If either decl says `inline', this fn is inline, unless
1810 its definition was passed already. */
1811 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1812 DECL_INLINE (olddecl) = 1;
1813 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1815 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1816 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1819 /* Preserve abstractness on cloned [cd]tors. */
1820 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1824 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1825 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1826 COPY_DECL_RTL (newdecl, olddecl);
1828 if (! types_match || new_defines_function)
1830 /* These need to be copied so that the names are available.
1831 Note that if the types do match, we'll preserve inline
1832 info and other bits, but if not, we won't. */
1833 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1834 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1836 if (new_defines_function)
1837 /* If defining a function declared with other language
1838 linkage, use the previously declared language linkage. */
1839 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1840 else if (types_match)
1842 /* If redeclaring a builtin function, and not a definition,
1843 it stays built in. */
1844 if (DECL_BUILT_IN (olddecl))
1846 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1847 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1848 /* If we're keeping the built-in definition, keep the rtl,
1849 regardless of declaration matches. */
1850 COPY_DECL_RTL (olddecl, newdecl);
1853 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1854 /* Don't clear out the arguments if we're redefining a function. */
1855 if (DECL_ARGUMENTS (olddecl))
1856 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1859 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1860 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1862 /* Now preserve various other info from the definition. */
1863 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1864 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1865 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1866 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1868 /* If either declaration has a nondefault visibility, use it. */
1869 if (DECL_VISIBILITY (olddecl) != VISIBILITY_DEFAULT)
1871 if (DECL_VISIBILITY (newdecl) != VISIBILITY_DEFAULT
1872 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1874 warning ("%J'%D': visibility attribute ignored because it",
1876 warning ("%Jconflicts with previous declaration here", olddecl);
1878 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1881 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1885 function_size = sizeof (struct tree_decl);
1887 memcpy ((char *) olddecl + sizeof (struct tree_common),
1888 (char *) newdecl + sizeof (struct tree_common),
1889 function_size - sizeof (struct tree_common));
1891 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
1892 /* If newdecl is a template instantiation, it is possible that
1893 the following sequence of events has occurred:
1895 o A friend function was declared in a class template. The
1896 class template was instantiated.
1898 o The instantiation of the friend declaration was
1899 recorded on the instantiation list, and is newdecl.
1901 o Later, however, instantiate_class_template called pushdecl
1902 on the newdecl to perform name injection. But, pushdecl in
1903 turn called duplicate_decls when it discovered that another
1904 declaration of a global function with the same name already
1907 o Here, in duplicate_decls, we decided to clobber newdecl.
1909 If we're going to do that, we'd better make sure that
1910 olddecl, and not newdecl, is on the list of
1911 instantiations so that if we try to do the instantiation
1912 again we won't get the clobbered declaration. */
1913 reregister_specialization (newdecl,
1914 DECL_TI_TEMPLATE (newdecl),
1919 memcpy ((char *) olddecl + sizeof (struct tree_common),
1920 (char *) newdecl + sizeof (struct tree_common),
1921 sizeof (struct tree_decl) - sizeof (struct tree_common)
1922 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
1925 DECL_UID (olddecl) = olddecl_uid;
1927 DECL_FRIEND_P (olddecl) = 1;
1929 /* NEWDECL contains the merged attribute lists.
1930 Update OLDDECL to be the same. */
1931 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
1933 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
1934 so that encode_section_info has a chance to look at the new decl
1935 flags and attributes. */
1936 if (DECL_RTL_SET_P (olddecl)
1937 && (TREE_CODE (olddecl) == FUNCTION_DECL
1938 || (TREE_CODE (olddecl) == VAR_DECL
1939 && TREE_STATIC (olddecl))))
1940 make_decl_rtl (olddecl, NULL);
1945 /* Return zero if the declaration NEWDECL is valid
1946 when the declaration OLDDECL (assumed to be for the same name)
1947 has already been seen.
1948 Otherwise return an error message format string with a %s
1949 where the identifier should go. */
1952 redeclaration_error_message (tree newdecl, tree olddecl)
1954 if (TREE_CODE (newdecl) == TYPE_DECL)
1956 /* Because C++ can put things into name space for free,
1957 constructs like "typedef struct foo { ... } foo"
1958 would look like an erroneous redeclaration. */
1959 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
1962 return "redefinition of `%#D'";
1964 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1966 /* If this is a pure function, its olddecl will actually be
1967 the original initialization to `0' (which we force to call
1968 abort()). Don't complain about redefinition in this case. */
1969 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl))
1972 /* If both functions come from different namespaces, this is not
1973 a redeclaration - this is a conflict with a used function. */
1974 if (DECL_NAMESPACE_SCOPE_P (olddecl)
1975 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
1976 return "`%D' conflicts with used function";
1978 /* We'll complain about linkage mismatches in
1979 warn_extern_redeclared_static. */
1981 /* Defining the same name twice is no good. */
1982 if (DECL_INITIAL (olddecl) != NULL_TREE
1983 && DECL_INITIAL (newdecl) != NULL_TREE)
1985 if (DECL_NAME (olddecl) == NULL_TREE)
1986 return "`%#D' not declared in class";
1988 return "redefinition of `%#D'";
1992 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1996 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1998 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
1999 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2000 return "redefinition of `%#D'";
2004 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2005 || (DECL_TEMPLATE_RESULT (newdecl)
2006 == DECL_TEMPLATE_RESULT (olddecl)))
2009 nt = DECL_TEMPLATE_RESULT (newdecl);
2010 if (DECL_TEMPLATE_INFO (nt))
2011 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2012 ot = DECL_TEMPLATE_RESULT (olddecl);
2013 if (DECL_TEMPLATE_INFO (ot))
2014 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2015 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2016 return "redefinition of `%#D'";
2020 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2022 /* Objects declared at top level: */
2023 /* If at least one is a reference, it's ok. */
2024 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2026 /* Reject two definitions. */
2027 return "redefinition of `%#D'";
2031 /* Objects declared with block scope: */
2032 /* Reject two definitions, and reject a definition
2033 together with an external reference. */
2034 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2035 return "redeclaration of `%#D'";
2040 /* Create a new label, named ID. */
2043 make_label_decl (tree id, int local_p)
2047 decl = build_decl (LABEL_DECL, id, void_type_node);
2049 DECL_CONTEXT (decl) = current_function_decl;
2050 DECL_MODE (decl) = VOIDmode;
2051 C_DECLARED_LABEL_FLAG (decl) = local_p;
2053 /* Say where one reference is to the label, for the sake of the
2054 error if it is not defined. */
2055 DECL_SOURCE_LOCATION (decl) = input_location;
2057 /* Record the fact that this identifier is bound to this label. */
2058 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2063 /* Record this label on the list of used labels so that we can check
2064 at the end of the function to see whether or not the label was
2065 actually defined, and so we can check when the label is defined whether
2066 this use is valid. */
2069 use_label (tree decl)
2071 if (named_label_uses == NULL
2072 || named_label_uses->names_in_scope != current_binding_level->names
2073 || named_label_uses->label_decl != decl)
2075 struct named_label_use_list *new_ent;
2076 new_ent = ggc_alloc (sizeof (struct named_label_use_list));
2077 new_ent->label_decl = decl;
2078 new_ent->names_in_scope = current_binding_level->names;
2079 new_ent->binding_level = current_binding_level;
2080 new_ent->o_goto_locus = input_location;
2081 new_ent->next = named_label_uses;
2082 named_label_uses = new_ent;
2086 /* Look for a label named ID in the current function. If one cannot
2087 be found, create one. (We keep track of used, but undefined,
2088 labels, and complain about them at the end of a function.) */
2091 lookup_label (tree id)
2094 struct named_label_list *ent;
2096 timevar_push (TV_NAME_LOOKUP);
2097 /* You can't use labels at global scope. */
2098 if (current_function_decl == NULL_TREE)
2100 error ("label `%E' referenced outside of any function", id);
2101 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2104 /* See if we've already got this label. */
2105 decl = IDENTIFIER_LABEL_VALUE (id);
2106 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2107 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2109 /* Record this label on the list of labels used in this function.
2110 We do this before calling make_label_decl so that we get the
2111 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2112 ent = ggc_alloc_cleared (sizeof (struct named_label_list));
2113 ent->old_value = IDENTIFIER_LABEL_VALUE (id);
2114 ent->next = named_labels;
2117 /* We need a new label. */
2118 decl = make_label_decl (id, /*local_p=*/0);
2120 /* Now fill in the information we didn't have before. */
2121 ent->label_decl = decl;
2123 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2126 /* Declare a local label named ID. */
2129 declare_local_label (tree id)
2133 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2134 this scope we can restore the old value of
2135 IDENTIFIER_TYPE_VALUE. */
2136 current_binding_level->shadowed_labels
2137 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2138 current_binding_level->shadowed_labels);
2139 /* Look for the label. */
2140 decl = make_label_decl (id, /*local_p=*/1);
2141 /* Now fill in the information we didn't have before. */
2142 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
2147 /* Returns nonzero if it is ill-formed to jump past the declaration of
2148 DECL. Returns 2 if it's also a real problem. */
2151 decl_jump_unsafe (tree decl)
2153 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))
2156 if (DECL_INITIAL (decl) == NULL_TREE
2157 && pod_type_p (TREE_TYPE (decl)))
2160 /* This is really only important if we're crossing an initialization.
2161 The POD stuff is just pedantry; why should it matter if the class
2162 contains a field of pointer to member type? */
2163 if (DECL_INITIAL (decl)
2164 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))))
2169 /* Check that a single previously seen jump to a newly defined label
2170 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2171 the jump context; NAMES are the names in scope in LEVEL at the jump
2172 context; FILE and LINE are the source position of the jump or 0. */
2175 check_previous_goto_1 (tree decl,
2176 struct cp_binding_level* level,
2177 tree names, const location_t *locus)
2181 struct cp_binding_level *b = current_binding_level;
2182 for (; b; b = b->level_chain)
2184 tree new_decls = b->names;
2185 tree old_decls = (b == level ? names : NULL_TREE);
2186 for (; new_decls != old_decls;
2187 new_decls = TREE_CHAIN (new_decls))
2189 int problem = decl_jump_unsafe (new_decls);
2196 pedwarn ("jump to label `%D'", decl);
2198 pedwarn ("jump to case label");
2201 pedwarn ("%H from here", locus);
2206 cp_error_at (" crosses initialization of `%#D'",
2209 cp_pedwarn_at (" enters scope of non-POD `%#D'",
2215 if ((b->kind == sk_try || b->kind == sk_catch) && ! saw_eh)
2220 pedwarn ("jump to label `%D'", decl);
2222 pedwarn ("jump to case label");
2225 pedwarn ("%H from here", locus);
2228 if (b->kind == sk_try)
2229 error (" enters try block");
2231 error (" enters catch block");
2238 check_previous_goto (struct named_label_use_list* use)
2240 check_previous_goto_1 (use->label_decl, use->binding_level,
2241 use->names_in_scope, &use->o_goto_locus);
2245 check_switch_goto (struct cp_binding_level* level)
2247 check_previous_goto_1 (NULL_TREE, level, level->names, NULL);
2250 /* Check that any previously seen jumps to a newly defined label DECL
2251 are OK. Called by define_label. */
2254 check_previous_gotos (tree decl)
2256 struct named_label_use_list **usep;
2258 if (! TREE_USED (decl))
2261 for (usep = &named_label_uses; *usep; )
2263 struct named_label_use_list *use = *usep;
2264 if (use->label_decl == decl)
2266 check_previous_goto (use);
2270 usep = &(use->next);
2274 /* Check that a new jump to a label DECL is OK. Called by
2275 finish_goto_stmt. */
2278 check_goto (tree decl)
2282 struct named_label_list *lab;
2284 /* We can't know where a computed goto is jumping. So we assume
2286 if (! DECL_P (decl))
2289 /* If the label hasn't been defined yet, defer checking. */
2290 if (! DECL_INITIAL (decl))
2296 for (lab = named_labels; lab; lab = lab->next)
2297 if (decl == lab->label_decl)
2300 /* If the label is not on named_labels it's a gcc local label, so
2301 it must be in an outer scope, so jumping to it is always OK. */
2305 if ((lab->in_try_scope || lab->in_catch_scope || lab->bad_decls)
2308 cp_pedwarn_at ("jump to label `%D'", decl);
2309 pedwarn (" from here");
2313 for (bad = lab->bad_decls; bad; bad = TREE_CHAIN (bad))
2315 tree b = TREE_VALUE (bad);
2316 int u = decl_jump_unsafe (b);
2318 if (u > 1 && DECL_ARTIFICIAL (b))
2319 /* Can't skip init of __exception_info. */
2320 error ("%J enters catch block", b);
2322 cp_error_at (" skips initialization of `%#D'", b);
2324 cp_pedwarn_at (" enters scope of non-POD `%#D'", b);
2327 if (lab->in_try_scope)
2328 error (" enters try block");
2329 else if (lab->in_catch_scope)
2330 error (" enters catch block");
2333 /* Define a label, specifying the location in the source file.
2334 Return the LABEL_DECL node for the label. */
2337 define_label (location_t location, tree name)
2339 tree decl = lookup_label (name);
2340 struct named_label_list *ent;
2341 struct cp_binding_level *p;
2343 timevar_push (TV_NAME_LOOKUP);
2344 for (ent = named_labels; ent; ent = ent->next)
2345 if (ent->label_decl == decl)
2348 /* After labels, make any new cleanups in the function go into their
2349 own new (temporary) binding contour. */
2350 for (p = current_binding_level;
2351 p->kind != sk_function_parms;
2353 p->more_cleanups_ok = 0;
2355 if (name == get_identifier ("wchar_t"))
2356 pedwarn ("label named wchar_t");
2358 if (DECL_INITIAL (decl) != NULL_TREE)
2359 error ("duplicate label `%D'", decl);
2362 /* Mark label as having been defined. */
2363 DECL_INITIAL (decl) = error_mark_node;
2364 /* Say where in the source. */
2365 DECL_SOURCE_LOCATION (decl) = location;
2368 ent->names_in_scope = current_binding_level->names;
2369 ent->binding_level = current_binding_level;
2371 check_previous_gotos (decl);
2374 timevar_pop (TV_NAME_LOOKUP);
2380 struct cp_binding_level *level;
2381 struct cp_switch *next;
2382 /* The SWITCH_STMT being built. */
2384 /* A splay-tree mapping the low element of a case range to the high
2385 element, or NULL_TREE if there is no high element. Used to
2386 determine whether or not a new case label duplicates an old case
2387 label. We need a tree, rather than simply a hash table, because
2388 of the GNU case range extension. */
2392 /* A stack of the currently active switch statements. The innermost
2393 switch statement is on the top of the stack. There is no need to
2394 mark the stack for garbage collection because it is only active
2395 during the processing of the body of a function, and we never
2396 collect at that point. */
2398 static struct cp_switch *switch_stack;
2400 /* Called right after a switch-statement condition is parsed.
2401 SWITCH_STMT is the switch statement being parsed. */
2404 push_switch (tree switch_stmt)
2406 struct cp_switch *p = xmalloc (sizeof (struct cp_switch));
2407 p->level = current_binding_level;
2408 p->next = switch_stack;
2409 p->switch_stmt = switch_stmt;
2410 p->cases = splay_tree_new (case_compare, NULL, NULL);
2417 struct cp_switch *cs = switch_stack;
2419 /* Emit warnings as needed. */
2420 c_do_switch_warnings (cs->cases, cs->switch_stmt);
2422 splay_tree_delete (cs->cases);
2423 switch_stack = switch_stack->next;
2427 /* Note that we've seen a definition of a case label, and complain if this
2428 is a bad place for one. */
2431 finish_case_label (tree low_value, tree high_value)
2434 struct cp_binding_level *p;
2436 if (processing_template_decl)
2440 /* For templates, just add the case label; we'll do semantic
2441 analysis at instantiation-time. */
2442 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2443 return add_stmt (build_case_label (low_value, high_value, label));
2446 /* Find the condition on which this switch statement depends. */
2447 cond = SWITCH_COND (switch_stack->switch_stmt);
2448 if (cond && TREE_CODE (cond) == TREE_LIST)
2449 cond = TREE_VALUE (cond);
2451 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2452 low_value, high_value);
2454 check_switch_goto (switch_stack->level);
2456 /* After labels, make any new cleanups in the function go into their
2457 own new (temporary) binding contour. */
2458 for (p = current_binding_level;
2459 p->kind != sk_function_parms;
2461 p->more_cleanups_ok = 0;
2466 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2469 typename_hash (const void* k)
2474 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2475 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2480 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2483 typename_compare (const void * k1, const void * k2)
2492 d1 = TYPE_NAME (t1);
2493 d2 = TYPE_NAME (t2);
2495 return (DECL_NAME (d1) == DECL_NAME (d2)
2496 && TYPE_CONTEXT (t1) == TYPE_CONTEXT (t2)
2497 && ((TREE_TYPE (t1) != NULL_TREE)
2498 == (TREE_TYPE (t2) != NULL_TREE))
2499 && same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))
2500 && TYPENAME_TYPE_FULLNAME (t1) == TYPENAME_TYPE_FULLNAME (t2));
2503 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2504 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
2505 is non-NULL, this type is being created by the implicit typename
2506 extension, and BASE_TYPE is a type named `t' in some base class of
2507 `T' which depends on template parameters.
2509 Returns the new TYPENAME_TYPE. */
2511 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2514 build_typename_type (tree context, tree name, tree fullname)
2520 if (typename_htab == NULL)
2522 typename_htab = htab_create_ggc (61, &typename_hash,
2523 &typename_compare, NULL);
2526 /* Build the TYPENAME_TYPE. */
2527 t = make_aggr_type (TYPENAME_TYPE);
2528 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2529 TYPENAME_TYPE_FULLNAME (t) = fullname;
2531 /* Build the corresponding TYPE_DECL. */
2532 d = build_decl (TYPE_DECL, name, t);
2533 TYPE_NAME (TREE_TYPE (d)) = d;
2534 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2535 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2536 DECL_ARTIFICIAL (d) = 1;
2538 /* See if we already have this type. */
2539 e = htab_find_slot (typename_htab, t, INSERT);
2548 /* Resolve `typename CONTEXT::NAME'. Returns an appropriate type,
2549 unless an error occurs, in which case error_mark_node is returned.
2550 If we locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is
2551 set, we return that, rather than the _TYPE it corresponds to, in
2552 other cases we look through the type decl. If TF_ERROR is set,
2553 complain about errors, otherwise be quiet. */
2556 make_typename_type (tree context, tree name, tsubst_flags_t complain)
2560 if (name == error_mark_node
2561 || context == NULL_TREE
2562 || context == error_mark_node)
2563 return error_mark_node;
2567 if (!(TYPE_LANG_SPECIFIC (name)
2568 && (CLASSTYPE_IS_TEMPLATE (name)
2569 || CLASSTYPE_USE_TEMPLATE (name))))
2570 name = TYPE_IDENTIFIER (name);
2572 /* Create a TEMPLATE_ID_EXPR for the type. */
2573 name = build_nt (TEMPLATE_ID_EXPR,
2574 CLASSTYPE_TI_TEMPLATE (name),
2575 CLASSTYPE_TI_ARGS (name));
2577 else if (TREE_CODE (name) == TYPE_DECL)
2578 name = DECL_NAME (name);
2582 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2584 name = TREE_OPERAND (name, 0);
2585 if (TREE_CODE (name) == TEMPLATE_DECL)
2586 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2588 if (TREE_CODE (name) == TEMPLATE_DECL)
2590 error ("`%D' used without template parameters", name);
2591 return error_mark_node;
2593 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 20030802);
2595 if (TREE_CODE (context) == NAMESPACE_DECL)
2597 /* We can get here from typename_sub0 in the explicit_template_type
2598 expansion. Just fail. */
2599 if (complain & tf_error)
2600 error ("no class template named `%#T' in `%#T'",
2602 return error_mark_node;
2605 if (!dependent_type_p (context)
2606 || currently_open_class (context))
2608 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2610 tree tmpl = NULL_TREE;
2611 if (IS_AGGR_TYPE (context))
2612 tmpl = lookup_field (context, name, 0, false);
2613 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2615 if (complain & tf_error)
2616 error ("no class template named `%#T' in `%#T'",
2618 return error_mark_node;
2621 if (complain & tf_error)
2622 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2624 return lookup_template_class (tmpl,
2625 TREE_OPERAND (fullname, 1),
2627 /*entering_scope=*/0,
2628 tf_error | tf_warning | tf_user);
2634 if (!IS_AGGR_TYPE (context))
2636 if (complain & tf_error)
2637 error ("no type named `%#T' in `%#T'", name, context);
2638 return error_mark_node;
2641 t = lookup_field (context, name, 0, true);
2644 if (TREE_CODE (t) != TYPE_DECL)
2646 if (complain & tf_error)
2647 error ("no type named `%#T' in `%#T'", name, context);
2648 return error_mark_node;
2651 if (complain & tf_error)
2652 perform_or_defer_access_check (TYPE_BINFO (context), t);
2654 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2662 /* If the CONTEXT is not a template type, then either the field is
2663 there now or its never going to be. */
2664 if (!dependent_type_p (context))
2666 if (complain & tf_error)
2667 error ("no type named `%#T' in `%#T'", name, context);
2668 return error_mark_node;
2671 return build_typename_type (context, name, fullname);
2674 /* Resolve `CONTEXT::template NAME'. Returns an appropriate type,
2675 unless an error occurs, in which case error_mark_node is returned.
2676 If we locate a TYPE_DECL, we return that, rather than the _TYPE it
2677 corresponds to. If COMPLAIN zero, don't complain about any errors
2681 make_unbound_class_template (tree context, tree name, tsubst_flags_t complain)
2687 name = TYPE_IDENTIFIER (name);
2688 else if (DECL_P (name))
2689 name = DECL_NAME (name);
2690 if (TREE_CODE (name) != IDENTIFIER_NODE)
2693 if (!dependent_type_p (context)
2694 || currently_open_class (context))
2696 tree tmpl = NULL_TREE;
2698 if (IS_AGGR_TYPE (context))
2699 tmpl = lookup_field (context, name, 0, false);
2701 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2703 if (complain & tf_error)
2704 error ("no class template named `%#T' in `%#T'", name, context);
2705 return error_mark_node;
2708 if (complain & tf_error)
2709 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2714 /* Build the UNBOUND_CLASS_TEMPLATE. */
2715 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2716 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2717 TREE_TYPE (t) = NULL_TREE;
2719 /* Build the corresponding TEMPLATE_DECL. */
2720 d = build_decl (TEMPLATE_DECL, name, t);
2721 TYPE_NAME (TREE_TYPE (d)) = d;
2722 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2723 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2724 DECL_ARTIFICIAL (d) = 1;
2731 /* Push the declarations of builtin types into the namespace.
2732 RID_INDEX is the index of the builtin type in the array
2733 RID_POINTERS. NAME is the name used when looking up the builtin
2734 type. TYPE is the _TYPE node for the builtin type. */
2737 record_builtin_type (enum rid rid_index,
2741 tree rname = NULL_TREE, tname = NULL_TREE;
2742 tree tdecl = NULL_TREE;
2744 if ((int) rid_index < (int) RID_MAX)
2745 rname = ridpointers[(int) rid_index];
2747 tname = get_identifier (name);
2749 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2750 eliminated. Built-in types should not be looked up name; their
2751 names are keywords that the parser can recognize. However, there
2752 is code in c-common.c that uses identifier_global_value to look
2753 up built-in types by name. */
2756 tdecl = build_decl (TYPE_DECL, tname, type);
2757 DECL_ARTIFICIAL (tdecl) = 1;
2758 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2764 tdecl = build_decl (TYPE_DECL, rname, type);
2765 DECL_ARTIFICIAL (tdecl) = 1;
2767 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2770 if (!TYPE_NAME (type))
2771 TYPE_NAME (type) = tdecl;
2774 debug_hooks->type_decl (tdecl, 0);
2777 /* Record one of the standard Java types.
2778 * Declare it as having the given NAME.
2779 * If SIZE > 0, it is the size of one of the integral types;
2780 * otherwise it is the negative of the size of one of the other types. */
2783 record_builtin_java_type (const char* name, int size)
2787 type = make_signed_type (size);
2788 else if (size > -32)
2789 { /* "__java_char" or ""__java_boolean". */
2790 type = make_unsigned_type (-size);
2791 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2794 { /* "__java_float" or ""__java_double". */
2795 type = make_node (REAL_TYPE);
2796 TYPE_PRECISION (type) = - size;
2799 record_builtin_type (RID_MAX, name, type);
2800 decl = TYPE_NAME (type);
2802 /* Suppress generate debug symbol entries for these types,
2803 since for normal C++ they are just clutter.
2804 However, push_lang_context undoes this if extern "Java" is seen. */
2805 DECL_IGNORED_P (decl) = 1;
2807 TYPE_FOR_JAVA (type) = 1;
2811 /* Push a type into the namespace so that the back-ends ignore it. */
2814 record_unknown_type (tree type, const char* name)
2816 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
2817 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2818 DECL_IGNORED_P (decl) = 1;
2819 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
2820 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
2821 TYPE_ALIGN (type) = 1;
2822 TYPE_USER_ALIGN (type) = 0;
2823 TYPE_MODE (type) = TYPE_MODE (void_type_node);
2826 /* An string for which we should create an IDENTIFIER_NODE at
2829 typedef struct predefined_identifier
2831 /* The name of the identifier. */
2832 const char *const name;
2833 /* The place where the IDENTIFIER_NODE should be stored. */
2835 /* Nonzero if this is the name of a constructor or destructor. */
2836 const int ctor_or_dtor_p;
2837 } predefined_identifier;
2839 /* Create all the predefined identifiers. */
2842 initialize_predefined_identifiers (void)
2844 const predefined_identifier *pid;
2846 /* A table of identifiers to create at startup. */
2847 static const predefined_identifier predefined_identifiers[] = {
2848 { "C++", &lang_name_cplusplus, 0 },
2849 { "C", &lang_name_c, 0 },
2850 { "Java", &lang_name_java, 0 },
2851 { CTOR_NAME, &ctor_identifier, 1 },
2852 { "__base_ctor", &base_ctor_identifier, 1 },
2853 { "__comp_ctor", &complete_ctor_identifier, 1 },
2854 { DTOR_NAME, &dtor_identifier, 1 },
2855 { "__comp_dtor", &complete_dtor_identifier, 1 },
2856 { "__base_dtor", &base_dtor_identifier, 1 },
2857 { "__deleting_dtor", &deleting_dtor_identifier, 1 },
2858 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
2859 { "nelts", &nelts_identifier, 0 },
2860 { THIS_NAME, &this_identifier, 0 },
2861 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
2862 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
2863 { "_vptr", &vptr_identifier, 0 },
2864 { "__vtt_parm", &vtt_parm_identifier, 0 },
2865 { "::", &global_scope_name, 0 },
2866 { "std", &std_identifier, 0 },
2870 for (pid = predefined_identifiers; pid->name; ++pid)
2872 *pid->node = get_identifier (pid->name);
2873 if (pid->ctor_or_dtor_p)
2874 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
2878 /* Create the predefined scalar types of C,
2879 and some nodes representing standard constants (0, 1, (void *)0).
2880 Initialize the global binding level.
2881 Make definitions for built-in primitive functions. */
2884 cxx_init_decl_processing (void)
2887 tree void_ftype_ptr;
2889 build_common_tree_nodes (flag_signed_char);
2891 /* Create all the identifiers we need. */
2892 initialize_predefined_identifiers ();
2894 /* Create the global variables. */
2895 push_to_top_level ();
2897 current_function_decl = NULL_TREE;
2898 current_binding_level = NULL;
2899 /* Enter the global namespace. */
2900 my_friendly_assert (global_namespace == NULL_TREE, 375);
2901 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
2903 begin_scope (sk_namespace, global_namespace);
2905 current_lang_name = NULL_TREE;
2907 /* Adjust various flags based on command-line settings. */
2908 if (!flag_permissive)
2909 flag_pedantic_errors = 1;
2910 if (!flag_no_inline)
2912 flag_inline_trees = 1;
2915 if (flag_inline_functions)
2917 flag_inline_trees = 2;
2918 flag_inline_functions = 0;
2921 /* Force minimum function alignment if using the least significant
2922 bit of function pointers to store the virtual bit. */
2923 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
2924 && force_align_functions_log < 1)
2925 force_align_functions_log = 1;
2928 current_lang_name = lang_name_c;
2930 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
2931 TREE_TYPE (error_mark_list) = error_mark_node;
2933 /* Create the `std' namespace. */
2934 push_namespace (std_identifier);
2935 std_node = current_namespace;
2938 c_common_nodes_and_builtins ();
2940 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
2941 java_short_type_node = record_builtin_java_type ("__java_short", 16);
2942 java_int_type_node = record_builtin_java_type ("__java_int", 32);
2943 java_long_type_node = record_builtin_java_type ("__java_long", 64);
2944 java_float_type_node = record_builtin_java_type ("__java_float", -32);
2945 java_double_type_node = record_builtin_java_type ("__java_double", -64);
2946 java_char_type_node = record_builtin_java_type ("__java_char", -16);
2947 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
2949 integer_two_node = build_int_2 (2, 0);
2950 TREE_TYPE (integer_two_node) = integer_type_node;
2951 integer_three_node = build_int_2 (3, 0);
2952 TREE_TYPE (integer_three_node) = integer_type_node;
2954 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
2955 truthvalue_type_node = boolean_type_node;
2956 truthvalue_false_node = boolean_false_node;
2957 truthvalue_true_node = boolean_true_node;
2959 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
2962 record_builtin_type (RID_MAX, NULL, string_type_node);
2965 delta_type_node = ptrdiff_type_node;
2966 vtable_index_type = ptrdiff_type_node;
2968 vtt_parm_type = build_pointer_type (const_ptr_type_node);
2969 void_ftype = build_function_type (void_type_node, void_list_node);
2970 void_ftype_ptr = build_function_type (void_type_node,
2971 tree_cons (NULL_TREE,
2975 = build_exception_variant (void_ftype_ptr, empty_except_spec);
2977 /* C++ extensions */
2979 unknown_type_node = make_node (UNKNOWN_TYPE);
2980 record_unknown_type (unknown_type_node, "unknown type");
2982 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
2983 TREE_TYPE (unknown_type_node) = unknown_type_node;
2985 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
2987 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
2988 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
2991 /* Make sure we get a unique function type, so we can give
2992 its pointer type a name. (This wins for gdb.) */
2993 tree vfunc_type = make_node (FUNCTION_TYPE);
2994 TREE_TYPE (vfunc_type) = integer_type_node;
2995 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
2996 layout_type (vfunc_type);
2998 vtable_entry_type = build_pointer_type (vfunc_type);
3000 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3003 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3004 layout_type (vtbl_type_node);
3005 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3006 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3007 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3008 layout_type (vtbl_ptr_type_node);
3009 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3011 push_namespace (get_identifier ("__cxxabiv1"));
3012 abi_node = current_namespace;
3015 global_type_node = make_node (LANG_TYPE);
3016 record_unknown_type (global_type_node, "global type");
3019 current_lang_name = lang_name_cplusplus;
3023 tree bad_alloc_type_node;
3024 tree bad_alloc_decl;
3025 tree newtype, deltype;
3026 tree ptr_ftype_sizetype;
3028 push_namespace (std_identifier);
3029 bad_alloc_id = get_identifier ("bad_alloc");
3030 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3031 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3033 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3034 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3035 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3039 = build_function_type (ptr_type_node,
3040 tree_cons (NULL_TREE,
3043 newtype = build_exception_variant
3044 (ptr_ftype_sizetype, add_exception_specifier
3045 (NULL_TREE, bad_alloc_type_node, -1));
3046 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3047 push_cp_library_fn (NEW_EXPR, newtype);
3048 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3049 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3050 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3054 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3056 /* Perform other language dependent initializations. */
3057 init_class_processing ();
3058 init_rtti_processing ();
3060 if (flag_exceptions)
3061 init_exception_processing ();
3063 if (! supports_one_only ())
3066 make_fname_decl = cp_make_fname_decl;
3067 start_fname_decls ();
3069 /* Show we use EH for cleanups. */
3070 if (flag_exceptions)
3071 using_eh_for_cleanups ();
3074 /* Generate an initializer for a function naming variable from
3075 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3076 filled in with the type of the init. */
3079 cp_fname_init (const char* name, tree *type_p)
3081 tree domain = NULL_TREE;
3083 tree init = NULL_TREE;
3088 length = strlen (name);
3089 domain = build_index_type (size_int (length));
3090 init = build_string (length + 1, name);
3093 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3094 type = build_cplus_array_type (type, domain);
3099 TREE_TYPE (init) = type;
3101 init = error_mark_node;
3106 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3107 decl, NAME is the initialization string and TYPE_DEP indicates whether
3108 NAME depended on the type of the function. We make use of that to detect
3109 __PRETTY_FUNCTION__ inside a template fn. This is being done
3110 lazily at the point of first use, so we mustn't push the decl now. */
3113 cp_make_fname_decl (tree id, int type_dep)
3115 const char *const name = (type_dep && processing_template_decl
3116 ? NULL : fname_as_string (type_dep));
3118 tree init = cp_fname_init (name, &type);
3119 tree decl = build_decl (VAR_DECL, id, type);
3122 free ((char *) name);
3124 /* As we're using pushdecl_with_scope, we must set the context. */
3125 DECL_CONTEXT (decl) = current_function_decl;
3126 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3128 TREE_STATIC (decl) = 1;
3129 TREE_READONLY (decl) = 1;
3130 DECL_ARTIFICIAL (decl) = 1;
3131 DECL_INITIAL (decl) = init;
3133 TREE_USED (decl) = 1;
3135 if (current_function_decl)
3137 struct cp_binding_level *b = current_binding_level;
3138 while (b->level_chain->kind != sk_function_parms)
3140 pushdecl_with_scope (decl, b);
3141 cp_finish_decl (decl, init, NULL_TREE, LOOKUP_ONLYCONVERTING);
3144 pushdecl_top_level_and_finish (decl, init);
3149 /* Make a definition for a builtin function named NAME in the current
3150 namespace, whose data type is TYPE and whose context is CONTEXT.
3151 TYPE should be a function type with argument types.
3153 CLASS and CODE tell later passes how to compile calls to this function.
3154 See tree.h for possible values.
3156 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3157 the name to be called if we can't opencode the function.
3158 If ATTRS is nonzero, use that for the function's attribute
3162 builtin_function_1 (const char* name,
3166 enum built_in_class class,
3167 const char* libname,
3170 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3171 DECL_BUILT_IN_CLASS (decl) = class;
3172 DECL_FUNCTION_CODE (decl) = code;
3173 DECL_CONTEXT (decl) = context;
3177 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3178 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3179 function in the namespace. */
3181 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3183 /* Warn if a function in the namespace for users
3184 is used without an occasion to consider it declared. */
3185 if (name[0] != '_' || name[1] != '_')
3186 DECL_ANTICIPATED (decl) = 1;
3188 /* Possibly apply some default attributes to this built-in function. */
3190 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3192 decl_attributes (&decl, NULL_TREE, 0);
3197 /* Entry point for the benefit of c_common_nodes_and_builtins.
3199 Make a definition for a builtin function named NAME and whose data type
3200 is TYPE. TYPE should be a function type with argument types. This
3201 function places the anticipated declaration in the global namespace
3202 and additionally in the std namespace if appropriate.
3204 CLASS and CODE tell later passes how to compile calls to this function.
3205 See tree.h for possible values.
3207 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3208 the name to be called if we can't opencode the function.
3210 If ATTRS is nonzero, use that for the function's attribute
3214 builtin_function (const char* name,
3217 enum built_in_class class,
3218 const char* libname,
3221 /* All builtins that don't begin with an '_' should additionally
3222 go in the 'std' namespace. */
3225 push_namespace (std_identifier);
3226 builtin_function_1 (name, type, std_node, code, class, libname, attrs);
3230 return builtin_function_1 (name, type, NULL_TREE, code,
3231 class, libname, attrs);
3234 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3235 function. Not called directly. */
3238 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3240 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3241 DECL_EXTERNAL (fn) = 1;
3242 TREE_PUBLIC (fn) = 1;
3243 DECL_ARTIFICIAL (fn) = 1;
3244 TREE_NOTHROW (fn) = 1;
3245 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3246 SET_DECL_LANGUAGE (fn, lang_c);
3250 /* Returns the _DECL for a library function with C linkage.
3251 We assume that such functions never throw; if this is incorrect,
3252 callers should unset TREE_NOTHROW. */
3255 build_library_fn (tree name, tree type)
3257 return build_library_fn_1 (name, ERROR_MARK, type);
3260 /* Returns the _DECL for a library function with C++ linkage. */
3263 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3265 tree fn = build_library_fn_1 (name, operator_code, type);
3266 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3267 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3268 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3272 /* Like build_library_fn, but takes a C string instead of an
3276 build_library_fn_ptr (const char* name, tree type)
3278 return build_library_fn (get_identifier (name), type);
3281 /* Like build_cp_library_fn, but takes a C string instead of an
3285 build_cp_library_fn_ptr (const char* name, tree type)
3287 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3290 /* Like build_library_fn, but also pushes the function so that we will
3291 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3294 push_library_fn (tree name, tree type)
3296 tree fn = build_library_fn (name, type);
3297 pushdecl_top_level (fn);
3301 /* Like build_cp_library_fn, but also pushes the function so that it
3302 will be found by normal lookup. */
3305 push_cp_library_fn (enum tree_code operator_code, tree type)
3307 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3314 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3318 push_void_library_fn (tree name, tree parmtypes)
3320 tree type = build_function_type (void_type_node, parmtypes);
3321 return push_library_fn (name, type);
3324 /* Like push_library_fn, but also note that this function throws
3325 and does not return. Used for __throw_foo and the like. */
3328 push_throw_library_fn (tree name, tree type)
3330 tree fn = push_library_fn (name, type);
3331 TREE_THIS_VOLATILE (fn) = 1;
3332 TREE_NOTHROW (fn) = 0;
3336 /* When we call finish_struct for an anonymous union, we create
3337 default copy constructors and such. But, an anonymous union
3338 shouldn't have such things; this function undoes the damage to the
3339 anonymous union type T.
3341 (The reason that we create the synthesized methods is that we don't
3342 distinguish `union { int i; }' from `typedef union { int i; } U'.
3343 The first is an anonymous union; the second is just an ordinary
3347 fixup_anonymous_aggr (tree t)
3351 /* Wipe out memory of synthesized methods. */
3352 TYPE_HAS_CONSTRUCTOR (t) = 0;
3353 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3354 TYPE_HAS_INIT_REF (t) = 0;
3355 TYPE_HAS_CONST_INIT_REF (t) = 0;
3356 TYPE_HAS_ASSIGN_REF (t) = 0;
3357 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3359 /* Splice the implicitly generated functions out of the TYPE_METHODS
3361 q = &TYPE_METHODS (t);
3364 if (DECL_ARTIFICIAL (*q))
3365 *q = TREE_CHAIN (*q);
3367 q = &TREE_CHAIN (*q);
3370 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3371 if (TYPE_METHODS (t))
3372 error ("%Jan anonymous union cannot have function members",
3373 TYPE_MAIN_DECL (t));
3375 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3376 assignment operators (because they cannot have these methods themselves).
3377 For anonymous unions this is already checked because they are not allowed
3378 in any union, otherwise we have to check it. */
3379 if (TREE_CODE (t) != UNION_TYPE)
3383 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3384 if (TREE_CODE (field) == FIELD_DECL)
3386 type = TREE_TYPE (field);
3387 if (CLASS_TYPE_P (type))
3389 if (TYPE_NEEDS_CONSTRUCTING (type))
3390 cp_error_at ("member %#D' with constructor not allowed in anonymous aggregate",
3392 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3393 cp_error_at ("member %#D' with destructor not allowed in anonymous aggregate",
3395 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3396 cp_error_at ("member %#D' with copy assignment operator not allowed in anonymous aggregate",
3403 /* Make sure that a declaration with no declarator is well-formed, i.e.
3404 just declares a tagged type or anonymous union.
3406 Returns the type declared; or NULL_TREE if none. */
3409 check_tag_decl (cp_decl_specifier_seq *declspecs)
3411 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3412 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3413 /* If a class, struct, or enum type is declared by the DECLSPECS
3414 (i.e, if a class-specifier, enum-specifier, or non-typename
3415 elaborated-type-specifier appears in the DECLSPECS),
3416 DECLARED_TYPE is set to the corresponding type. */
3417 tree declared_type = NULL_TREE;
3418 bool error_p = false;
3420 if (declspecs->multiple_types_p)
3421 error ("multiple types in one declaration");
3422 else if (declspecs->redefined_builtin_type)
3424 if (!in_system_header)
3425 pedwarn ("redeclaration of C++ built-in type %qT",
3426 declspecs->redefined_builtin_type);
3430 if (TYPE_P (declspecs->type)
3431 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3432 && IS_AGGR_TYPE (declspecs->type))
3433 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3434 declared_type = declspecs->type;
3435 else if (declspecs->type == error_mark_node)
3437 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3438 pedwarn ("declaration does not declare anything");
3439 /* Check for an anonymous union. */
3440 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3441 && TYPE_ANONYMOUS_P (declared_type))
3443 /* 7/3 In a simple-declaration, the optional init-declarator-list
3444 can be omitted only when declaring a class (clause 9) or
3445 enumeration (7.2), that is, when the decl-specifier-seq contains
3446 either a class-specifier, an elaborated-type-specifier with
3447 a class-key (9.1), or an enum-specifier. In these cases and
3448 whenever a class-specifier or enum-specifier is present in the
3449 decl-specifier-seq, the identifiers in these specifiers are among
3450 the names being declared by the declaration (as class-name,
3451 enum-names, or enumerators, depending on the syntax). In such
3452 cases, and except for the declaration of an unnamed bit-field (9.6),
3453 the decl-specifier-seq shall introduce one or more names into the
3454 program, or shall redeclare a name introduced by a previous
3455 declaration. [Example:
3456 enum { }; // ill-formed
3457 typedef class { }; // ill-formed
3461 error ("missing type-name in typedef-declaration");
3464 /* Anonymous unions are objects, so they can have specifiers. */;
3465 SET_ANON_AGGR_TYPE_P (declared_type);
3467 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3468 && !in_system_header)
3469 pedwarn ("ISO C++ prohibits anonymous structs");
3474 if (declspecs->specs[(int)ds_inline]
3475 || declspecs->specs[(int)ds_virtual])
3476 error ("`%s' can only be specified for functions",
3477 declspecs->specs[(int)ds_inline]
3478 ? "inline" : "virtual");
3480 && (!current_class_type
3481 || current_scope () != current_class_type))
3482 error ("`friend' can only be specified inside a class");
3483 else if (declspecs->specs[(int)ds_explicit])
3484 error ("`explicit' can only be specified for constructors");
3485 else if (declspecs->storage_class)
3486 error ("a storage class can only be specified for objects "
3488 else if (declspecs->specs[(int)ds_const]
3489 || declspecs->specs[(int)ds_volatile]
3490 || declspecs->specs[(int)ds_restrict]
3491 || declspecs->specs[(int)ds_thread])
3492 error ("qualifiers can only be specified for objects "
3496 return declared_type;
3499 /* Called when a declaration is seen that contains no names to declare.
3500 If its type is a reference to a structure, union or enum inherited
3501 from a containing scope, shadow that tag name for the current scope
3502 with a forward reference.
3503 If its type defines a new named structure or union
3504 or defines an enum, it is valid but we need not do anything here.
3505 Otherwise, it is an error.
3507 C++: may have to grok the declspecs to learn about static,
3508 complain for anonymous unions.
3510 Returns the TYPE declared -- or NULL_TREE if none. */
3513 shadow_tag (cp_decl_specifier_seq *declspecs)
3515 tree t = check_tag_decl (declspecs);
3520 maybe_process_partial_specialization (t);
3522 /* This is where the variables in an anonymous union are
3523 declared. An anonymous union declaration looks like:
3525 because there is no declarator after the union, the parser
3526 sends that declaration here. */
3527 if (ANON_AGGR_TYPE_P (t))
3529 fixup_anonymous_aggr (t);
3531 if (TYPE_FIELDS (t))
3533 tree decl = grokdeclarator (/*declarator=*/NULL,
3534 declspecs, NORMAL, 0, NULL);
3535 finish_anon_union (decl);
3542 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3545 groktypename (cp_decl_specifier_seq *type_specifiers,
3546 const cp_declarator *declarator)
3550 attrs = type_specifiers->attributes;
3551 type_specifiers->attributes = NULL_TREE;
3552 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3554 cplus_decl_attributes (&type, attrs, 0);
3558 /* Decode a declarator in an ordinary declaration or data definition.
3559 This is called as soon as the type information and variable name
3560 have been parsed, before parsing the initializer if any.
3561 Here we create the ..._DECL node, fill in its type,
3562 and put it on the list of decls for the current context.
3563 The ..._DECL node is returned as the value.
3565 Exception: for arrays where the length is not specified,
3566 the type is left null, to be filled in by `cp_finish_decl'.
3568 Function definitions do not come here; they go to start_function
3569 instead. However, external and forward declarations of functions
3570 do go through here. Structure field declarations are done by
3571 grokfield and not through here. */
3574 start_decl (const cp_declarator *declarator,
3575 cp_decl_specifier_seq *declspecs,
3578 tree prefix_attributes)
3584 /* This should only be done once on the top most decl. */
3585 if (have_extern_spec)
3587 declspecs->storage_class = sc_extern;
3588 have_extern_spec = false;
3591 /* An object declared as __attribute__((deprecated)) suppresses
3592 warnings of uses of other deprecated items. */
3593 if (lookup_attribute ("deprecated", attributes))
3594 deprecated_state = DEPRECATED_SUPPRESS;
3596 attributes = chainon (attributes, prefix_attributes);
3598 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3601 deprecated_state = DEPRECATED_NORMAL;
3603 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
3606 type = TREE_TYPE (decl);
3608 if (type == error_mark_node)
3611 context = DECL_CONTEXT (decl);
3613 if (initialized && context && TREE_CODE (context) == NAMESPACE_DECL
3614 && context != current_namespace && TREE_CODE (decl) == VAR_DECL)
3616 /* When parsing the initializer, lookup should use the object's
3618 push_decl_namespace (context);
3621 /* We are only interested in class contexts, later. */
3622 if (context && TREE_CODE (context) == NAMESPACE_DECL)
3623 context = NULL_TREE;
3626 /* Is it valid for this decl to have an initializer at all?
3627 If not, set INITIALIZED to zero, which will indirectly
3628 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3629 switch (TREE_CODE (decl))
3632 error ("typedef `%D' is initialized (use __typeof__ instead)", decl);
3637 error ("function `%#D' is initialized like a variable", decl);
3647 if (! toplevel_bindings_p ()
3648 && DECL_EXTERNAL (decl))
3649 warning ("declaration of `%#D' has `extern' and is initialized",
3651 DECL_EXTERNAL (decl) = 0;
3652 if (toplevel_bindings_p ())
3653 TREE_STATIC (decl) = 1;
3655 /* Tell `pushdecl' this is an initialized decl
3656 even though we don't yet have the initializer expression.
3657 Also tell `cp_finish_decl' it may store the real initializer. */
3658 DECL_INITIAL (decl) = error_mark_node;
3661 /* Set attributes here so if duplicate decl, will have proper attributes. */
3662 cplus_decl_attributes (&decl, attributes, 0);
3664 /* If #pragma weak was used, mark the decl weak now. */
3665 if (global_scope_p (current_binding_level))
3666 maybe_apply_pragma_weak (decl);
3668 if (TREE_CODE (decl) == FUNCTION_DECL
3669 && DECL_DECLARED_INLINE_P (decl)
3670 && DECL_UNINLINABLE (decl)
3671 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3672 warning ("%Jinline function '%D' given attribute noinline", decl, decl);
3674 if (context && COMPLETE_TYPE_P (complete_type (context)))
3676 push_nested_class (context);
3678 if (TREE_CODE (decl) == VAR_DECL)
3680 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3681 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3682 error ("`%#D' is not a static member of `%#T'", decl, context);
3685 if (DECL_CONTEXT (field) != context)
3687 if (!same_type_p (DECL_CONTEXT (field), context))
3688 pedwarn ("ISO C++ does not permit `%T::%D' to be defined as `%T::%D'",
3689 DECL_CONTEXT (field), DECL_NAME (decl),
3690 context, DECL_NAME (decl));
3691 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3693 /* Static data member are tricky; an in-class initialization
3694 still doesn't provide a definition, so the in-class
3695 declaration will have DECL_EXTERNAL set, but will have an
3696 initialization. Thus, duplicate_decls won't warn
3697 about this situation, and so we check here. */
3698 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
3699 error ("duplicate initialization of %D", decl);
3700 if (duplicate_decls (decl, field))
3706 tree field = check_classfn (context, decl,
3707 (processing_template_decl
3708 > template_class_depth (context))
3709 ? current_template_parms
3711 if (field && duplicate_decls (decl, field))
3715 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3716 DECL_IN_AGGR_P (decl) = 0;
3717 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3718 || CLASSTYPE_TEMPLATE_INSTANTIATION (context))
3720 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3721 /* [temp.expl.spec] An explicit specialization of a static data
3722 member of a template is a definition if the declaration
3723 includes an initializer; otherwise, it is a declaration.
3725 We check for processing_specialization so this only applies
3726 to the new specialization syntax. */
3727 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
3728 DECL_EXTERNAL (decl) = 1;
3731 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3732 pedwarn ("declaration of `%#D' outside of class is not definition",
3736 /* Enter this declaration into the symbol table. */
3737 tem = maybe_push_decl (decl);
3739 if (processing_template_decl)
3740 tem = push_template_decl (tem);
3741 if (tem == error_mark_node)
3742 return error_mark_node;
3744 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3745 /* Tell the back-end to use or not use .common as appropriate. If we say
3746 -fconserve-space, we want this to save .data space, at the expense of
3747 wrong semantics. If we say -fno-conserve-space, we want this to
3748 produce errors about redefs; to do this we force variables into the
3750 DECL_COMMON (tem) = ((TREE_CODE (tem) != VAR_DECL
3751 || !DECL_THREAD_LOCAL (tem))
3752 && (flag_conserve_space || ! TREE_PUBLIC (tem)));
3755 if (! processing_template_decl)
3762 start_decl_1 (tree decl)
3764 tree type = TREE_TYPE (decl);
3765 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
3767 if (type == error_mark_node)
3771 /* Is it valid for this decl to have an initializer at all?
3772 If not, set INITIALIZED to zero, which will indirectly
3773 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3775 /* Don't allow initializations for incomplete types except for
3776 arrays which might be completed by the initialization. */
3777 if (COMPLETE_TYPE_P (complete_type (type)))
3778 ; /* A complete type is ok. */
3779 else if (TREE_CODE (type) != ARRAY_TYPE)
3781 error ("variable `%#D' has initializer but incomplete type",
3784 type = TREE_TYPE (decl) = error_mark_node;
3786 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3788 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3789 error ("elements of array `%#D' have incomplete type", decl);
3790 /* else we already gave an error in start_decl. */
3796 && TREE_CODE (decl) != TYPE_DECL
3797 && TREE_CODE (decl) != TEMPLATE_DECL
3798 && type != error_mark_node
3799 && IS_AGGR_TYPE (type)
3800 && ! DECL_EXTERNAL (decl))
3802 if ((! processing_template_decl || ! uses_template_parms (type))
3803 && !COMPLETE_TYPE_P (complete_type (type)))
3805 error ("aggregate `%#D' has incomplete type and cannot be defined",
3807 /* Change the type so that assemble_variable will give
3808 DECL an rtl we can live with: (mem (const_int 0)). */
3809 type = TREE_TYPE (decl) = error_mark_node;
3813 /* If any base type in the hierarchy of TYPE needs a constructor,
3814 then we set initialized to 1. This way any nodes which are
3815 created for the purposes of initializing this aggregate
3816 will live as long as it does. This is necessary for global
3817 aggregates which do not have their initializers processed until
3818 the end of the file. */
3819 initialized = TYPE_NEEDS_CONSTRUCTING (type);
3824 DECL_INITIAL (decl) = NULL_TREE;
3826 /* Create a new scope to hold this declaration if necessary.
3827 Whether or not a new scope is necessary cannot be determined
3828 until after the type has been completed; if the type is a
3829 specialization of a class template it is not until after
3830 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3831 will be set correctly. */
3832 maybe_push_cleanup_level (type);
3835 /* Handle initialization of references. DECL, TYPE, and INIT have the
3836 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3837 but will be set to a new CLEANUP_STMT if a temporary is created
3838 that must be destroyed subsequently.
3840 Returns an initializer expression to use to initialize DECL, or
3841 NULL if the initialization can be performed statically.
3843 Quotes on semantics can be found in ARM 8.4.3. */
3846 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
3850 if (init == NULL_TREE)
3852 if ((DECL_LANG_SPECIFIC (decl) == 0
3853 || DECL_IN_AGGR_P (decl) == 0)
3854 && ! DECL_THIS_EXTERN (decl))
3855 error ("`%D' declared as reference but not initialized", decl);
3859 if (TREE_CODE (init) == CONSTRUCTOR)
3861 error ("ISO C++ forbids use of initializer list to initialize reference `%D'", decl);
3865 if (TREE_CODE (init) == TREE_LIST)
3866 init = build_x_compound_expr_from_list (init, "initializer");
3868 if (TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE)
3869 init = convert_from_reference (init);
3871 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
3872 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
3873 /* Note: default conversion is only called in very special cases. */
3874 init = decay_conversion (init);
3876 /* Convert INIT to the reference type TYPE. This may involve the
3877 creation of a temporary, whose lifetime must be the same as that
3878 of the reference. If so, a DECL_EXPR for the temporary will be
3879 added just after the DECL_EXPR for DECL. That's why we don't set
3880 DECL_INITIAL for local references (instead assigning to them
3881 explicitly); we need to allow the temporary to be initialized
3883 tmp = initialize_reference (type, init, decl, cleanup);
3885 if (tmp == error_mark_node)
3887 else if (tmp == NULL_TREE)
3889 error ("cannot initialize `%T' from `%T'", type, TREE_TYPE (init));
3893 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
3896 DECL_INITIAL (decl) = tmp;
3901 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3902 array until we finish parsing the initializer. If that's the
3903 situation we're in, update DECL accordingly. */
3906 maybe_deduce_size_from_array_init (tree decl, tree init)
3908 tree type = TREE_TYPE (decl);
3910 if (TREE_CODE (type) == ARRAY_TYPE
3911 && TYPE_DOMAIN (type) == NULL_TREE
3912 && TREE_CODE (decl) != TYPE_DECL)
3914 /* do_default is really a C-ism to deal with tentative definitions.
3915 But let's leave it here to ease the eventual merge. */
3916 int do_default = !DECL_EXTERNAL (decl);
3917 tree initializer = init ? init : DECL_INITIAL (decl);
3918 int failure = complete_array_type (type, initializer, do_default);
3921 error ("initializer fails to determine size of `%D'", decl);
3926 error ("array size missing in `%D'", decl);
3927 /* If a `static' var's size isn't known, make it extern as
3928 well as static, so it does not get allocated. If it's not
3929 `static', then don't mark it extern; finish_incomplete_decl
3930 will give it a default size and it will get allocated. */
3931 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
3932 DECL_EXTERNAL (decl) = 1;
3935 if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
3936 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
3938 error ("zero-size array `%D'", decl);
3940 layout_decl (decl, 0);
3944 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
3945 any appropriate error messages regarding the layout. */
3948 layout_var_decl (tree decl)
3950 tree type = TREE_TYPE (decl);
3952 tree ttype = target_type (type);
3955 /* If we haven't already layed out this declaration, do so now.
3956 Note that we must not call complete type for an external object
3957 because it's type might involve templates that we are not
3958 supposed to instantiate yet. (And it's perfectly valid to say
3959 `extern X x' for some incomplete type `X'.) */
3960 if (!DECL_EXTERNAL (decl))
3961 complete_type (type);
3962 if (!DECL_SIZE (decl)
3963 && TREE_TYPE (decl) != error_mark_node
3964 && (COMPLETE_TYPE_P (type)
3965 || (TREE_CODE (type) == ARRAY_TYPE
3966 && !TYPE_DOMAIN (type)
3967 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
3968 layout_decl (decl, 0);
3970 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
3972 /* An automatic variable with an incomplete type: that is an error.
3973 Don't talk about array types here, since we took care of that
3974 message in grokdeclarator. */
3975 error ("storage size of `%D' isn't known", decl);
3976 TREE_TYPE (decl) = error_mark_node;
3979 /* Keep this code around in case we later want to control debug info
3980 based on whether a type is "used". (jason 1999-11-11) */
3982 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
3983 /* Let debugger know it should output info for this type. */
3984 note_debug_info_needed (ttype);
3986 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
3987 note_debug_info_needed (DECL_CONTEXT (decl));
3990 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
3991 && DECL_SIZE (decl) != NULL_TREE
3992 && ! TREE_CONSTANT (DECL_SIZE (decl)))
3994 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
3995 constant_expression_warning (DECL_SIZE (decl));
3997 error ("storage size of `%D' isn't constant", decl);
4000 if (TREE_STATIC (decl)
4001 && !DECL_ARTIFICIAL (decl)
4002 && current_function_decl
4003 && DECL_CONTEXT (decl) == current_function_decl)
4004 push_local_name (decl);
4007 /* If a local static variable is declared in an inline function, or if
4008 we have a weak definition, we must endeavor to create only one
4009 instance of the variable at link-time. */
4012 maybe_commonize_var (tree decl)
4014 /* Static data in a function with comdat linkage also has comdat
4016 if (TREE_STATIC (decl)
4017 /* Don't mess with __FUNCTION__. */
4018 && ! DECL_ARTIFICIAL (decl)
4019 && DECL_FUNCTION_SCOPE_P (decl)
4020 /* Unfortunately, import_export_decl has not always been called
4021 before the function is processed, so we cannot simply check
4023 && (DECL_COMDAT (DECL_CONTEXT (decl))
4024 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4025 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4026 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4030 /* With weak symbols, we simply make the variable COMDAT;
4031 that will cause copies in multiple translations units to
4033 comdat_linkage (decl);
4037 if (DECL_INITIAL (decl) == NULL_TREE
4038 || DECL_INITIAL (decl) == error_mark_node)
4040 /* Without weak symbols, we can use COMMON to merge
4041 uninitialized variables. */
4042 TREE_PUBLIC (decl) = 1;
4043 DECL_COMMON (decl) = 1;
4047 /* While for initialized variables, we must use internal
4048 linkage -- which means that multiple copies will not
4050 TREE_PUBLIC (decl) = 0;
4051 DECL_COMMON (decl) = 0;
4052 cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl);
4053 warning ("%J you can work around this by removing the initializer",
4058 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4059 /* Set it up again; we might have set DECL_INITIAL since the last
4061 comdat_linkage (decl);
4064 /* Issue an error message if DECL is an uninitialized const variable. */
4067 check_for_uninitialized_const_var (tree decl)
4069 tree type = TREE_TYPE (decl);
4071 /* ``Unless explicitly declared extern, a const object does not have
4072 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4074 if (TREE_CODE (decl) == VAR_DECL
4075 && TREE_CODE (type) != REFERENCE_TYPE
4076 && CP_TYPE_CONST_P (type)
4077 && !TYPE_NEEDS_CONSTRUCTING (type)
4078 && !DECL_INITIAL (decl))
4079 error ("uninitialized const `%D'", decl);
4082 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4083 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4084 initialized. If there are no more such fields, the return value
4088 next_initializable_field (tree field)
4091 && (TREE_CODE (field) != FIELD_DECL
4092 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4093 || DECL_ARTIFICIAL (field)))
4094 field = TREE_CHAIN (field);
4099 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4100 brace-enclosed aggregate initializer.
4102 *INITP is one of a list of initializers describing a brace-enclosed
4103 initializer for an entity of the indicated aggregate TYPE. It may
4104 not presently match the shape of the TYPE; for example:
4106 struct S { int a; int b; };
4107 struct S a[] = { 1, 2, 3, 4 };
4109 Here *INITP will point to TREE_LIST of four elements, rather than a
4110 list of two elements, each itself a list of two elements. This
4111 routine transforms INIT from the former form into the latter. The
4112 revised initializer is returned. */
4115 reshape_init (tree type, tree *initp)
4119 tree old_init_value;
4121 bool brace_enclosed_p;
4124 old_init_value = (TREE_CODE (*initp) == TREE_LIST
4125 ? TREE_VALUE (*initp) : old_init);
4127 my_friendly_assert (old_init_value, 20030723);
4129 /* If the initializer is brace-enclosed, pull initializers from the
4130 enclosed elements. Advance past the brace-enclosed initializer
4132 if (TREE_CODE (old_init_value) == CONSTRUCTOR
4133 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value))
4135 *initp = TREE_CHAIN (old_init);
4136 TREE_CHAIN (old_init) = NULL_TREE;
4137 inits = CONSTRUCTOR_ELTS (old_init_value);
4139 brace_enclosed_p = true;
4144 brace_enclosed_p = false;
4147 /* A non-aggregate type is always initialized with a single
4149 if (!CP_AGGREGATE_TYPE_P (type))
4151 *initp = TREE_CHAIN (old_init);
4152 TREE_CHAIN (old_init) = NULL_TREE;
4153 /* It is invalid to initialize a non-aggregate type with a
4154 brace-enclosed initializer. */
4155 if (brace_enclosed_p)
4157 error ("brace-enclosed initializer used to initialize `%T'",
4159 if (TREE_CODE (old_init) == TREE_LIST)
4160 TREE_VALUE (old_init) = error_mark_node;
4162 old_init = error_mark_node;
4170 All implicit type conversions (clause _conv_) are considered when
4171 initializing the aggregate member with an initializer from an
4172 initializer-list. If the initializer can initialize a member,
4173 the member is initialized. Otherwise, if the member is itself a
4174 non-empty subaggregate, brace elision is assumed and the
4175 initializer is considered for the initialization of the first
4176 member of the subaggregate. */
4177 if (!brace_enclosed_p
4178 && can_convert_arg (type, TREE_TYPE (old_init_value), old_init_value))
4180 *initp = TREE_CHAIN (old_init);
4181 TREE_CHAIN (old_init) = NULL_TREE;
4185 if (TREE_CODE (old_init_value) == STRING_CST
4186 && TREE_CODE (type) == ARRAY_TYPE
4187 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4189 /* [dcl.init.string]
4191 A char array (whether plain char, signed char, or unsigned char)
4192 can be initialized by a string-literal (optionally enclosed in
4193 braces); a wchar_t array can be initialized by a wide
4194 string-literal (optionally enclosed in braces). */
4195 new_init = old_init;
4196 /* Move past the initializer. */
4197 *initp = TREE_CHAIN (old_init);
4198 TREE_CHAIN (old_init) = NULL_TREE;
4202 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4203 new_init = build_constructor (NULL_TREE, NULL_TREE);
4205 if (CLASS_TYPE_P (type))
4209 field = next_initializable_field (TYPE_FIELDS (type));
4215 An initializer for an aggregate member that is an
4216 empty class shall have the form of an empty
4217 initializer-list {}. */
4218 if (!brace_enclosed_p)
4220 error ("initializer for `%T' must be brace-enclosed",
4222 return error_mark_node;
4227 /* Loop through the initializable fields, gathering
4233 /* Handle designated initializers, as an extension. */
4234 if (TREE_PURPOSE (*initp))
4237 pedwarn ("ISO C++ does not allow designated initializers");
4238 field = lookup_field_1 (type, TREE_PURPOSE (*initp),
4239 /*want_type=*/false);
4240 if (!field || TREE_CODE (field) != FIELD_DECL)
4241 error ("`%T' has no non-static data member named `%D'",
4242 type, TREE_PURPOSE (*initp));
4247 field_init = reshape_init (TREE_TYPE (field), initp);
4248 if (field_init == error_mark_node)
4249 return error_mark_node;
4250 TREE_CHAIN (field_init) = CONSTRUCTOR_ELTS (new_init);
4251 CONSTRUCTOR_ELTS (new_init) = field_init;
4254 When a union is initialized with a brace-enclosed
4255 initializer, the braces shall only contain an
4256 initializer for the first member of the union. */
4257 if (TREE_CODE (type) == UNION_TYPE)
4259 field = next_initializable_field (TREE_CHAIN (field));
4263 else if (TREE_CODE (type) == ARRAY_TYPE
4264 || TREE_CODE (type) == VECTOR_TYPE)
4269 /* If the bound of the array is known, take no more initializers
4270 than are allowed. */
4271 max_index = NULL_TREE;
4272 if (TREE_CODE (type) == ARRAY_TYPE)
4274 if (TYPE_DOMAIN (type))
4275 max_index = array_type_nelts (type);
4279 /* For a vector, the representation type is a struct
4280 containing a single member which is an array of the
4281 appropriate size. */
4282 tree rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4283 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4284 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4287 /* Loop through the array elements, gathering initializers. */
4288 for (index = size_zero_node;
4289 *initp && (!max_index || !tree_int_cst_lt (max_index, index));
4290 index = size_binop (PLUS_EXPR, index, size_one_node))
4294 element_init = reshape_init (TREE_TYPE (type), initp);
4295 if (element_init == error_mark_node)
4296 return error_mark_node;
4297 TREE_CHAIN (element_init) = CONSTRUCTOR_ELTS (new_init);
4298 CONSTRUCTOR_ELTS (new_init) = element_init;
4299 if (TREE_PURPOSE (element_init))
4301 tree next_index = TREE_PURPOSE (element_init);
4302 if (TREE_CODE (next_index) == IDENTIFIER_NODE)
4304 error ("name `%D' used in a GNU-style designated "
4305 "initializer for an array", next_index);
4306 TREE_PURPOSE (element_init) = NULL_TREE;
4316 /* The initializers were placed in reverse order in the
4318 CONSTRUCTOR_ELTS (new_init) = nreverse (CONSTRUCTOR_ELTS (new_init));
4320 if (TREE_CODE (old_init) == TREE_LIST)
4321 new_init = build_tree_list (TREE_PURPOSE (old_init), new_init);
4324 /* If this was a brace-enclosed initializer and all of the
4325 initializers were not used up, there is a problem. */
4326 if (brace_enclosed_p && *initp)
4327 error ("too many initializers for `%T'", type);
4332 /* Verify INIT (the initializer for DECL), and record the
4333 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4334 grok_reference_init.
4336 If the return value is non-NULL, it is an expression that must be
4337 evaluated dynamically to initialize DECL. */
4340 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4342 tree type = TREE_TYPE (decl);
4343 tree init_code = NULL;
4345 /* If `start_decl' didn't like having an initialization, ignore it now. */
4346 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
4349 /* If an initializer is present, DECL_INITIAL has been
4350 error_mark_node, to indicate that an as-of-yet unevaluated
4351 initialization will occur. From now on, DECL_INITIAL reflects
4352 the static initialization -- if any -- of DECL. */
4353 DECL_INITIAL (decl) = NULL_TREE;
4355 /* Things that are going to be initialized need to have complete
4357 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4359 if (type == error_mark_node)
4360 /* We will have already complained. */
4362 else if (init && COMPLETE_TYPE_P (type)
4363 && !TREE_CONSTANT (TYPE_SIZE (type)))
4365 error ("variable-sized object `%D' may not be initialized", decl);
4368 else if (TREE_CODE (type) == ARRAY_TYPE
4369 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4371 error ("elements of array `%#D' have incomplete type", decl);
4374 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4376 error ("`%D' has incomplete type", decl);
4377 TREE_TYPE (decl) = error_mark_node;
4381 if (TREE_CODE (decl) == CONST_DECL)
4383 my_friendly_assert (TREE_CODE (decl) != REFERENCE_TYPE, 148);
4385 DECL_INITIAL (decl) = init;
4387 my_friendly_assert (init != NULL_TREE, 149);
4390 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4391 init = grok_reference_init (decl, type, init, cleanup);
4394 if (TREE_CODE (init) == CONSTRUCTOR
4395 && BRACE_ENCLOSED_INITIALIZER_P (init))
4397 /* [dcl.init] paragraph 13,
4398 If T is a scalar type, then a declaration of the form
4403 reshape_init will complain about the extra braces,
4404 and doesn't do anything useful in the case where TYPE is
4405 scalar, so just don't call it. */
4406 if (CP_AGGREGATE_TYPE_P (type))
4407 init = reshape_init (type, &init);
4409 if ((*targetm.vector_opaque_p) (type))
4411 error ("opaque vector types cannot be initialized");
4412 init = error_mark_node;
4416 /* If DECL has an array type without a specific bound, deduce the
4417 array size from the initializer. */
4418 maybe_deduce_size_from_array_init (decl, init);
4419 type = TREE_TYPE (decl);
4421 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4423 if (TREE_CODE (type) == ARRAY_TYPE)
4424 goto initialize_aggr;
4425 else if (TREE_CODE (init) == CONSTRUCTOR
4426 && BRACE_ENCLOSED_INITIALIZER_P (init))
4428 if (TYPE_NON_AGGREGATE_CLASS (type))
4430 error ("`%D' must be initialized by constructor, not by `{...}'",
4432 init = error_mark_node;
4435 goto dont_use_constructor;
4439 int saved_stmts_are_full_exprs_p;
4442 saved_stmts_are_full_exprs_p = 0;
4443 if (building_stmt_tree ())
4445 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4446 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4448 init = build_aggr_init (decl, init, flags);
4449 if (building_stmt_tree ())
4450 current_stmt_tree ()->stmts_are_full_exprs_p =
4451 saved_stmts_are_full_exprs_p;
4457 dont_use_constructor:
4458 if (TREE_CODE (init) != TREE_VEC)
4460 init_code = store_init_value (decl, init);
4465 else if (DECL_EXTERNAL (decl))
4467 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4468 goto initialize_aggr;
4469 else if (IS_AGGR_TYPE (type))
4471 tree core_type = strip_array_types (type);
4473 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4474 error ("structure `%D' with uninitialized const members", decl);
4475 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4476 error ("structure `%D' with uninitialized reference members",
4479 check_for_uninitialized_const_var (decl);
4482 check_for_uninitialized_const_var (decl);
4484 if (init && init != error_mark_node)
4485 init_code = build (INIT_EXPR, type, decl, init);
4490 /* If DECL is not a local variable, give it RTL. */
4493 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4495 int toplev = toplevel_bindings_p ();
4498 /* Handle non-variables up front. */
4499 if (TREE_CODE (decl) != VAR_DECL)
4501 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
4505 /* If we see a class member here, it should be a static data
4507 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4509 my_friendly_assert (TREE_STATIC (decl), 19990828);
4510 /* An in-class declaration of a static data member should be
4511 external; it is only a declaration, and not a definition. */
4512 if (init == NULL_TREE)
4513 my_friendly_assert (DECL_EXTERNAL (decl), 20000723);
4516 /* Set the DECL_ASSEMBLER_NAME for the variable. */
4519 change_decl_assembler_name (decl, get_identifier (asmspec));
4520 /* The `register' keyword, when used together with an
4521 asm-specification, indicates that the variable should be
4522 placed in a particular register. */
4523 if (DECL_REGISTER (decl))
4524 DECL_HARD_REGISTER (decl) = 1;
4527 /* We don't create any RTL for local variables. */
4528 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4531 /* We defer emission of local statics until the corresponding
4532 DECL_EXPR is expanded. */
4533 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4535 /* We try to defer namespace-scope static constants so that they are
4536 not emitted into the object file unnecessarily. */
4537 if (!DECL_VIRTUAL_P (decl)
4538 && TREE_READONLY (decl)
4539 && DECL_INITIAL (decl) != NULL_TREE
4540 && DECL_INITIAL (decl) != error_mark_node
4541 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4543 && !TREE_PUBLIC (decl))
4545 /* Fool with the linkage of static consts according to #pragma
4547 if (!interface_unknown && !TREE_PUBLIC (decl))
4549 TREE_PUBLIC (decl) = 1;
4550 DECL_EXTERNAL (decl) = interface_only;
4555 /* Likewise for template instantiations. */
4556 else if (DECL_COMDAT (decl))
4559 /* If we're deferring the variable, we only need to make RTL if
4560 there's an ASMSPEC. Otherwise, we'll lazily create it later when
4561 we need it. (There's no way to lazily create RTL for things that
4562 have assembly specs because the information about the specifier
4563 isn't stored in the tree, yet) */
4564 if (defer_p && asmspec)
4565 make_decl_rtl (decl, asmspec);
4566 /* If we're not deferring, go ahead and assemble the variable. */
4568 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
4571 /* Generate code to initialize DECL (a local variable). */
4574 initialize_local_var (tree decl, tree init)
4576 tree type = TREE_TYPE (decl);
4579 my_friendly_assert (TREE_CODE (decl) == VAR_DECL
4580 || TREE_CODE (decl) == RESULT_DECL,
4582 my_friendly_assert (!TREE_STATIC (decl), 20021010);
4584 if (DECL_SIZE (decl) == NULL_TREE)
4586 /* If we used it already as memory, it must stay in memory. */
4587 DECL_INITIAL (decl) = NULL_TREE;
4588 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4591 if (DECL_SIZE (decl) && type != error_mark_node)
4595 /* Compute and store the initial value. */
4596 already_used = TREE_USED (decl) || TREE_USED (type);
4598 /* Perform the initialization. */
4601 int saved_stmts_are_full_exprs_p;
4603 my_friendly_assert (building_stmt_tree (), 20000906);
4604 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4605 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4606 finish_expr_stmt (init);
4607 current_stmt_tree ()->stmts_are_full_exprs_p =
4608 saved_stmts_are_full_exprs_p;
4611 /* Set this to 0 so we can tell whether an aggregate which was
4612 initialized was ever used. Don't do this if it has a
4613 destructor, so we don't complain about the 'resource
4614 allocation is initialization' idiom. Now set
4615 attribute((unused)) on types so decls of that type will be
4616 marked used. (see TREE_USED, above.) */
4617 if (TYPE_NEEDS_CONSTRUCTING (type)
4619 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4620 && DECL_NAME (decl))
4621 TREE_USED (decl) = 0;
4622 else if (already_used)
4623 TREE_USED (decl) = 1;
4626 /* Generate a cleanup, if necessary. */
4627 cleanup = cxx_maybe_build_cleanup (decl);
4628 if (DECL_SIZE (decl) && cleanup)
4629 finish_decl_cleanup (decl, cleanup);
4632 /* Finish processing of a declaration;
4633 install its line number and initial value.
4634 If the length of an array type is not known before,
4635 it must be determined now, from the initial value, or it is an error.
4637 INIT holds the value of an initializer that should be allowed to escape
4640 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4641 if the (init) syntax was used. */
4644 cp_finish_decl (tree decl, tree init, tree asmspec_tree, int flags)
4647 tree ttype = NULL_TREE;
4649 const char *asmspec = NULL;
4650 int was_readonly = 0;
4652 if (decl == error_mark_node)
4657 error ("assignment (not initialization) in declaration");
4661 my_friendly_assert (TREE_CODE (decl) != RESULT_DECL, 20030619);
4663 /* Assume no cleanup is required. */
4664 cleanup = NULL_TREE;
4666 /* If a name was specified, get the string. */
4667 if (global_scope_p (current_binding_level))
4668 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
4670 asmspec = TREE_STRING_POINTER (asmspec_tree);
4672 if (init && TREE_CODE (init) == NAMESPACE_DECL)
4674 error ("cannot initialize `%D' to namespace `%D'",
4679 if (current_class_type
4680 && CP_DECL_CONTEXT (decl) == current_class_type
4681 && TYPE_BEING_DEFINED (current_class_type)
4682 && (DECL_INITIAL (decl) || init))
4683 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
4685 if (TREE_CODE (decl) == VAR_DECL
4686 && DECL_CONTEXT (decl)
4687 && TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL
4688 && DECL_CONTEXT (decl) != current_namespace
4691 /* Leave the namespace of the object. */
4692 pop_decl_namespace ();
4695 type = TREE_TYPE (decl);
4697 if (type == error_mark_node)
4700 if (TYPE_HAS_MUTABLE_P (type))
4701 TREE_READONLY (decl) = 0;
4703 if (processing_template_decl)
4705 /* Add this declaration to the statement-tree. */
4706 if (at_function_scope_p ())
4707 add_decl_expr (decl);
4709 if (init && DECL_INITIAL (decl))
4710 DECL_INITIAL (decl) = init;
4711 if (TREE_CODE (decl) == VAR_DECL
4712 && !DECL_PRETTY_FUNCTION_P (decl)
4713 && !dependent_type_p (TREE_TYPE (decl)))
4714 maybe_deduce_size_from_array_init (decl, init);
4718 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4719 my_friendly_assert (TREE_CODE (decl) != PARM_DECL, 19990828);
4721 /* Take care of TYPE_DECLs up front. */
4722 if (TREE_CODE (decl) == TYPE_DECL)
4724 if (type != error_mark_node
4725 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
4727 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
4728 warning ("shadowing previous type declaration of `%#D'", decl);
4729 set_identifier_type_value (DECL_NAME (decl), decl);
4732 /* If we have installed this as the canonical typedef for this
4733 type, and that type has not been defined yet, delay emitting
4734 the debug information for it, as we will emit it later. */
4735 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
4736 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
4737 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
4739 rest_of_decl_compilation (decl, NULL,
4740 DECL_CONTEXT (decl) == NULL_TREE, at_eof);
4744 if (TREE_CODE (decl) != FUNCTION_DECL)
4745 ttype = target_type (type);
4748 /* Currently, GNU C++ puts constants in text space, making them
4749 impossible to initialize. In the future, one would hope for
4750 an operating system which understood the difference between
4751 initialization and the running of a program. */
4752 if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl))
4755 if (TYPE_NEEDS_CONSTRUCTING (type)
4756 || TREE_CODE (type) == REFERENCE_TYPE)
4757 TREE_READONLY (decl) = 0;
4760 if (TREE_CODE (decl) == VAR_DECL)
4762 /* Only PODs can have thread-local storage. Other types may require
4763 various kinds of non-trivial initialization. */
4764 if (DECL_THREAD_LOCAL (decl) && !pod_type_p (TREE_TYPE (decl)))
4765 error ("`%D' cannot be thread-local because it has non-POD type `%T'",
4766 decl, TREE_TYPE (decl));
4767 /* Convert the initializer to the type of DECL, if we have not
4768 already initialized DECL. */
4769 if (!DECL_INITIALIZED_P (decl)
4770 /* If !DECL_EXTERNAL then DECL is being defined. In the
4771 case of a static data member initialized inside the
4772 class-specifier, there can be an initializer even if DECL
4773 is *not* defined. */
4774 && (!DECL_EXTERNAL (decl) || init))
4776 init = check_initializer (decl, init, flags, &cleanup);
4777 /* Thread-local storage cannot be dynamically initialized. */
4778 if (DECL_THREAD_LOCAL (decl) && init)
4780 error ("`%D' is thread-local and so cannot be dynamically "
4781 "initialized", decl);
4788 The memory occupied by any object of static storage
4789 duration is zero-initialized at program startup before
4790 any other initialization takes place.
4792 We cannot create an appropriate initializer until after
4793 the type of DECL is finalized. If DECL_INITIAL is set,
4794 then the DECL is statically initialized, and any
4795 necessary zero-initialization has already been performed. */
4796 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
4797 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
4798 /*nelts=*/NULL_TREE,
4799 /*static_storage_p=*/true);
4800 /* Remember that the initialization for this variable has
4802 DECL_INITIALIZED_P (decl) = 1;
4804 /* If the variable has an array type, lay out the type, even if
4805 there is no initializer. It is valid to index through the
4806 array, and we must get TYPE_ALIGN set correctly on the array
4808 else if (TREE_CODE (type) == ARRAY_TYPE)
4812 /* Add this declaration to the statement-tree. This needs to happen
4813 after the call to check_initializer so that the DECL_EXPR for a
4814 reference temp is added before the DECL_EXPR for the reference itself. */
4815 if (at_function_scope_p ())
4816 add_decl_expr (decl);
4818 if (TREE_CODE (decl) == VAR_DECL)
4819 layout_var_decl (decl);
4821 /* Output the assembler code and/or RTL code for variables and functions,
4822 unless the type is an undefined structure or union.
4823 If not, it will get done when the type is completed. */
4824 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL)
4826 if (TREE_CODE (decl) == VAR_DECL)
4827 maybe_commonize_var (decl);
4829 make_rtl_for_nonlocal_decl (decl, init, asmspec);
4831 /* Check for abstractness of the type. Notice that there is no
4832 need to strip array types here since the check for those types
4833 is already done within create_array_type_for_decl. */
4834 if (TREE_CODE (type) == FUNCTION_TYPE
4835 || TREE_CODE (type) == METHOD_TYPE)
4836 abstract_virtuals_error (decl, TREE_TYPE (type));
4838 abstract_virtuals_error (decl, type);
4840 if (TREE_CODE (decl) == FUNCTION_DECL
4841 || TREE_TYPE (decl) == error_mark_node)
4842 /* No initialization required. */
4844 else if (DECL_EXTERNAL (decl)
4845 && ! (DECL_LANG_SPECIFIC (decl)
4846 && DECL_NOT_REALLY_EXTERN (decl)))
4849 DECL_INITIAL (decl) = init;
4853 /* A variable definition. */
4854 if (DECL_FUNCTION_SCOPE_P (decl))
4856 /* Initialize the local variable. */
4857 if (processing_template_decl)
4859 if (init || DECL_INITIAL (decl) == error_mark_node)
4860 DECL_INITIAL (decl) = init;
4862 else if (!TREE_STATIC (decl))
4863 initialize_local_var (decl, init);
4866 if (TREE_STATIC (decl))
4867 expand_static_init (decl, init);
4871 /* Undo call to `pushclass' that was done in `start_decl'
4872 due to initialization of qualified member variable.
4873 I.e., Foo::x = 10; */
4875 tree context = CP_DECL_CONTEXT (decl);
4878 && (TREE_CODE (decl) == VAR_DECL
4879 /* We also have a pushclass done that we need to undo here
4880 if we're at top level and declare a method. */
4881 || TREE_CODE (decl) == FUNCTION_DECL)
4882 /* If size hasn't been set, we're still defining it,
4883 and therefore inside the class body; don't pop
4884 the binding level.. */
4885 && COMPLETE_TYPE_P (context)
4886 && context == current_class_type)
4887 pop_nested_class ();
4891 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
4892 reference, insert it in the statement-tree now. */
4894 push_cleanup (decl, cleanup, false);
4899 TREE_READONLY (decl) = 1;
4901 /* If this was marked 'used', be sure it will be output. */
4902 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
4903 mark_decl_referenced (decl);
4906 /* This is here for a midend callback from c-common.c. */
4909 finish_decl (tree decl, tree init, tree asmspec_tree)
4911 cp_finish_decl (decl, init, asmspec_tree, 0);
4914 /* Returns a declaration for a VAR_DECL as if:
4916 extern "C" TYPE NAME;
4918 had been seen. Used to create compiler-generated global
4922 declare_global_var (tree name, tree type)
4926 push_to_top_level ();
4927 decl = build_decl (VAR_DECL, name, type);
4928 TREE_PUBLIC (decl) = 1;
4929 DECL_EXTERNAL (decl) = 1;
4930 DECL_ARTIFICIAL (decl) = 1;
4932 cp_finish_decl (decl, NULL_TREE, NULL_TREE, 0);
4933 pop_from_top_level ();
4938 /* Returns a pointer to the `atexit' function. Note that if
4939 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
4940 `__cxa_atexit' function specified in the IA64 C++ ABI. */
4943 get_atexit_node (void)
4954 if (flag_use_cxa_atexit)
4956 /* The declaration for `__cxa_atexit' is:
4958 int __cxa_atexit (void (*)(void *), void *, void *)
4960 We build up the argument types and then then function type
4963 /* First, build the pointer-to-function type for the first
4965 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
4966 fn_type = build_function_type (void_type_node, arg_types);
4967 fn_ptr_type = build_pointer_type (fn_type);
4968 /* Then, build the rest of the argument types. */
4969 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
4970 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
4971 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
4972 /* And the final __cxa_atexit type. */
4973 fn_type = build_function_type (integer_type_node, arg_types);
4974 fn_ptr_type = build_pointer_type (fn_type);
4975 name = "__cxa_atexit";
4979 /* The declaration for `atexit' is:
4981 int atexit (void (*)());
4983 We build up the argument types and then then function type
4985 fn_type = build_function_type (void_type_node, void_list_node);
4986 fn_ptr_type = build_pointer_type (fn_type);
4987 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
4988 /* Build the final atexit type. */
4989 fn_type = build_function_type (integer_type_node, arg_types);
4993 /* Now, build the function declaration. */
4994 push_lang_context (lang_name_c);
4995 atexit_fndecl = build_library_fn_ptr (name, fn_type);
4996 mark_used (atexit_fndecl);
4997 pop_lang_context ();
4998 atexit_node = decay_conversion (atexit_fndecl);
5003 /* Returns the __dso_handle VAR_DECL. */
5006 get_dso_handle_node (void)
5008 if (dso_handle_node)
5009 return dso_handle_node;
5011 /* Declare the variable. */
5012 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5015 return dso_handle_node;
5018 /* Begin a new function with internal linkage whose job will be simply
5019 to destroy some particular variable. */
5021 static GTY(()) int start_cleanup_cnt;
5024 start_cleanup_fn (void)
5026 int old_interface_only = interface_only;
5027 int old_interface_unknown = interface_unknown;
5033 push_to_top_level ();
5035 /* No need to mangle this. */
5036 push_lang_context (lang_name_c);
5039 interface_unknown = 1;
5041 /* Build the parameter-types. */
5042 parmtypes = void_list_node;
5043 /* Functions passed to __cxa_atexit take an additional parameter.
5044 We'll just ignore it. After we implement the new calling
5045 convention for destructors, we can eliminate the use of
5046 additional cleanup functions entirely in the -fnew-abi case. */
5047 if (flag_use_cxa_atexit)
5048 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5049 /* Build the function type itself. */
5050 fntype = build_function_type (void_type_node, parmtypes);
5051 /* Build the name of the function. */
5052 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5053 /* Build the function declaration. */
5054 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5055 /* It's a function with internal linkage, generated by the
5057 TREE_PUBLIC (fndecl) = 0;
5058 DECL_ARTIFICIAL (fndecl) = 1;
5059 /* Make the function `inline' so that it is only emitted if it is
5060 actually needed. It is unlikely that it will be inlined, since
5061 it is only called via a function pointer, but we avoid unnecessary
5062 emissions this way. */
5063 DECL_INLINE (fndecl) = 1;
5064 DECL_DECLARED_INLINE_P (fndecl) = 1;
5065 DECL_INTERFACE_KNOWN (fndecl) = 1;
5066 /* Build the parameter. */
5067 if (flag_use_cxa_atexit)
5071 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5072 DECL_CONTEXT (parmdecl) = fndecl;
5073 TREE_USED (parmdecl) = 1;
5074 DECL_ARGUMENTS (fndecl) = parmdecl;
5078 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5080 interface_unknown = old_interface_unknown;
5081 interface_only = old_interface_only;
5083 pop_lang_context ();
5085 return current_function_decl;
5088 /* Finish the cleanup function begun by start_cleanup_fn. */
5091 end_cleanup_fn (void)
5093 expand_or_defer_fn (finish_function (0));
5095 pop_from_top_level ();
5098 /* Generate code to handle the destruction of DECL, an object with
5099 static storage duration. */
5102 register_dtor_fn (tree decl)
5109 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5112 /* Call build_cleanup before we enter the anonymous function so that
5113 any access checks will be done relative to the current scope,
5114 rather than the scope of the anonymous function. */
5115 build_cleanup (decl);
5117 /* Now start the function. */
5118 cleanup = start_cleanup_fn ();
5120 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5121 to the original function, rather than the anonymous one. That
5122 will make the back-end think that nested functions are in use,
5123 which causes confusion. */
5125 push_deferring_access_checks (dk_no_check);
5126 fcall = build_cleanup (decl);
5127 pop_deferring_access_checks ();
5129 /* Create the body of the anonymous function. */
5130 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5131 finish_expr_stmt (fcall);
5132 finish_compound_stmt (compound_stmt);
5135 /* Call atexit with the cleanup function. */
5136 cxx_mark_addressable (cleanup);
5137 mark_used (cleanup);
5138 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5139 if (flag_use_cxa_atexit)
5141 args = tree_cons (NULL_TREE,
5142 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5144 args = tree_cons (NULL_TREE, null_pointer_node, args);
5145 args = tree_cons (NULL_TREE, cleanup, args);
5148 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5149 finish_expr_stmt (build_function_call (get_atexit_node (), args));
5152 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5153 is its initializer. Generate code to handle the construction
5154 and destruction of DECL. */
5157 expand_static_init (tree decl, tree init)
5159 my_friendly_assert (TREE_CODE (decl) == VAR_DECL, 20021010);
5160 my_friendly_assert (TREE_STATIC (decl), 20021010);
5162 /* Some variables require no initialization. */
5164 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5165 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5168 if (! toplevel_bindings_p ())
5170 /* Emit code to perform this initialization but once. */
5177 /* Emit code to perform this initialization but once. This code
5180 static int guard = 0;
5182 // Do initialization.
5184 // Register variable for destruction at end of program.
5187 Note that the `temp' variable is only set to 1 *after* the
5188 initialization is complete. This ensures that an exception,
5189 thrown during the construction, will cause the variable to
5190 reinitialized when we pass through this code again, as per:
5194 If the initialization exits by throwing an exception, the
5195 initialization is not complete, so it will be tried again
5196 the next time control enters the declaration.
5198 In theory, this process should be thread-safe, too; multiple
5199 threads should not be able to initialize the variable more
5200 than once. We don't yet attempt to ensure thread-safety. */
5202 /* Create the guard variable. */
5203 guard = get_guard (decl);
5205 /* Begin the conditional initialization. */
5206 if_stmt = begin_if_stmt ();
5207 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5208 then_clause = begin_compound_stmt (0);
5210 /* Do the initialization itself. */
5211 assignment = init ? init : NULL_TREE;
5213 /* Once the assignment is complete, set TEMP to 1. Since the
5214 construction of the static object is complete at this point,
5215 we want to make sure TEMP is set to 1 even if a temporary
5216 constructed during the initialization throws an exception
5217 when it is destroyed. So, we combine the initialization and
5218 the assignment to TEMP into a single expression, ensuring
5219 that when we call finish_expr_stmt the cleanups will not be
5220 run until after TEMP is set to 1. */
5221 guard_init = set_guard (guard);
5223 assignment = build_compound_expr (assignment, guard_init);
5225 assignment = guard_init;
5226 finish_expr_stmt (assignment);
5228 /* Use atexit to register a function for destroying this static
5230 register_dtor_fn (decl);
5232 finish_compound_stmt (then_clause);
5233 finish_then_clause (if_stmt);
5234 finish_if_stmt (if_stmt);
5237 static_aggregates = tree_cons (init, decl, static_aggregates);
5241 /* Make TYPE a complete type based on INITIAL_VALUE.
5242 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5243 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5246 complete_array_type (tree type, tree initial_value, int do_default)
5248 tree maxindex = NULL_TREE;
5253 /* An array of character type can be initialized from a
5254 brace-enclosed string constant. */
5255 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
5256 && TREE_CODE (initial_value) == CONSTRUCTOR
5257 && CONSTRUCTOR_ELTS (initial_value)
5258 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value)))
5260 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value)) == NULL_TREE)
5261 initial_value = TREE_VALUE (CONSTRUCTOR_ELTS (initial_value));
5263 /* Note MAXINDEX is really the maximum index, one less than the
5265 if (TREE_CODE (initial_value) == STRING_CST)
5268 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
5269 maxindex = build_int_2 ((TREE_STRING_LENGTH (initial_value)
5272 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
5274 tree elts = CONSTRUCTOR_ELTS (initial_value);
5276 maxindex = ssize_int (-1);
5277 for (; elts; elts = TREE_CHAIN (elts))
5279 if (TREE_PURPOSE (elts))
5280 maxindex = TREE_PURPOSE (elts);
5282 maxindex = size_binop (PLUS_EXPR, maxindex, ssize_int (1));
5284 maxindex = copy_node (maxindex);
5288 /* Make an error message unless that happened already. */
5289 if (initial_value != error_mark_node)
5292 initial_value = NULL_TREE;
5294 /* Prevent further error messages. */
5295 maxindex = build_int_2 (0, 0);
5302 maxindex = build_int_2 (0, 0);
5312 domain = build_index_type (maxindex);
5313 TYPE_DOMAIN (type) = domain;
5315 if (! TREE_TYPE (maxindex))
5316 TREE_TYPE (maxindex) = domain;
5318 itype = TREE_TYPE (initial_value);
5321 if (itype && !TYPE_DOMAIN (itype))
5322 TYPE_DOMAIN (itype) = domain;
5323 /* The type of the main variant should never be used for arrays
5324 of different sizes. It should only ever be completed with the
5325 size of the array. */
5326 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
5327 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
5329 elt_type = TREE_TYPE (type);
5330 TYPE_NEEDS_CONSTRUCTING (type)
5331 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type));
5332 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5333 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type));
5336 /* Lay out the type now that we can get the real answer. */
5343 /* Return zero if something is declared to be a member of type
5344 CTYPE when in the context of CUR_TYPE. STRING is the error
5345 message to print in that case. Otherwise, quietly return 1. */
5348 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5350 if (ctype && ctype != cur_type)
5352 if (flags == DTOR_FLAG)
5353 error ("destructor for alien class `%T' cannot be a member",
5356 error ("constructor for alien class `%T' cannot be a member",
5363 /* Subroutine of `grokdeclarator'. */
5365 /* Generate errors possibly applicable for a given set of specifiers.
5366 This is for ARM $7.1.2. */
5369 bad_specifiers (tree object,
5378 error ("`%D' declared as a `virtual' %s", object, type);
5380 error ("`%D' declared as an `inline' %s", object, type);
5382 error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
5385 cp_error_at ("`%D' declared as a friend", object);
5387 && (TREE_CODE (object) == TYPE_DECL
5388 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5389 && !TYPE_REFFN_P (TREE_TYPE (object))
5390 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5391 cp_error_at ("`%D' declared with an exception specification", object);
5394 /* CTYPE is class type, or null if non-class.
5395 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5397 DECLARATOR is the function's name.
5398 PARMS is a chain of PARM_DECLs for the function.
5399 VIRTUALP is truthvalue of whether the function is virtual or not.
5400 FLAGS are to be passed through to `grokclassfn'.
5401 QUALS are qualifiers indicating whether the function is `const'
5403 RAISES is a list of exceptions that this function can raise.
5404 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5405 not look, and -1 if we should not call `grokclassfn' at all.
5407 Returns `NULL_TREE' if something goes wrong, after issuing
5408 applicable error messages. */
5411 grokfndecl (tree ctype,
5415 tree orig_declarator,
5417 enum overload_flags flags,
5429 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5430 int has_default_arg = 0;
5434 type = build_exception_variant (type, raises);
5436 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5437 DECL_ARGUMENTS (decl) = parms;
5438 /* Propagate volatile out from type to decl. */
5439 if (TYPE_VOLATILE (type))
5440 TREE_THIS_VOLATILE (decl) = 1;
5442 /* If this decl has namespace scope, set that up. */
5444 set_decl_namespace (decl, in_namespace, friendp);
5446 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5448 /* `main' and builtins have implicit 'C' linkage. */
5449 if ((MAIN_NAME_P (declarator)
5450 || (IDENTIFIER_LENGTH (declarator) > 10
5451 && IDENTIFIER_POINTER (declarator)[0] == '_'
5452 && IDENTIFIER_POINTER (declarator)[1] == '_'
5453 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5454 && current_lang_name == lang_name_cplusplus
5455 && ctype == NULL_TREE
5456 /* NULL_TREE means global namespace. */
5457 && DECL_CONTEXT (decl) == NULL_TREE)
5458 SET_DECL_LANGUAGE (decl, lang_c);
5460 /* Should probably propagate const out from type to decl I bet (mrs). */
5463 DECL_STATIC_FUNCTION_P (decl) = 1;
5464 DECL_CONTEXT (decl) = ctype;
5468 DECL_CONTEXT (decl) = ctype;
5470 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
5472 if (processing_template_decl)
5473 error ("cannot declare `::main' to be a template");
5475 error ("cannot declare `::main' to be inline");
5477 error ("cannot declare `::main' to be static");
5478 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
5480 error ("`main' must return `int'");
5485 /* Members of anonymous types and local classes have no linkage; make
5486 them internal. If a typedef is made later, this will be changed. */
5487 if (ctype && (TYPE_ANONYMOUS_P (ctype)
5488 || decl_function_context (TYPE_MAIN_DECL (ctype))))
5493 /* [basic.link]: A name with no linkage (notably, the name of a class
5494 or enumeration declared in a local scope) shall not be used to
5495 declare an entity with linkage.
5497 Only check this for public decls for now. See core 319, 389. */
5498 t = no_linkage_check (TREE_TYPE (decl));
5501 if (TYPE_ANONYMOUS_P (t))
5503 if (DECL_EXTERN_C_P (decl))
5504 /* Allow this; it's pretty common in C. */;
5507 pedwarn ("non-local function `%#D' uses anonymous type",
5509 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5511 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5516 pedwarn ("non-local function `%#D' uses local type `%T'",
5521 TREE_PUBLIC (decl) = publicp;
5524 DECL_INTERFACE_KNOWN (decl) = 1;
5525 DECL_NOT_REALLY_EXTERN (decl) = 1;
5528 /* If the declaration was declared inline, mark it as such. */
5530 DECL_DECLARED_INLINE_P (decl) = 1;
5531 /* We inline functions that are explicitly declared inline, or, when
5532 the user explicitly asks us to, all functions. */
5533 if (DECL_DECLARED_INLINE_P (decl)
5534 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
5535 DECL_INLINE (decl) = 1;
5537 DECL_EXTERNAL (decl) = 1;
5538 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
5540 error ("%smember function `%D' cannot have cv-qualifier",
5541 (ctype ? "static " : "non-"), decl);
5542 quals = TYPE_UNQUALIFIED;
5545 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
5546 grok_op_properties (decl, friendp, /*complain=*/true);
5548 if (ctype && decl_function_context (decl))
5549 DECL_NO_STATIC_CHAIN (decl) = 1;
5551 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5552 if (TREE_PURPOSE (t)
5553 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5555 has_default_arg = 1;
5560 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5564 ("defining explicit specialization `%D' in friend declaration",
5568 tree fns = TREE_OPERAND (orig_declarator, 0);
5569 tree args = TREE_OPERAND (orig_declarator, 1);
5571 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5573 /* Something like `template <class T> friend void f<T>()'. */
5574 error ("invalid use of template-id `%D' in declaration of primary template",
5580 /* A friend declaration of the form friend void f<>(). Record
5581 the information in the TEMPLATE_ID_EXPR. */
5582 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5584 if (TREE_CODE (fns) == COMPONENT_REF)
5586 /* Due to bison parser ickiness, we will have already looked
5587 up an operator_name or PFUNCNAME within the current class
5588 (see template_id in parse.y). If the current class contains
5589 such a name, we'll get a COMPONENT_REF here. Undo that. */
5591 my_friendly_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5592 == current_class_type, 20001120);
5593 fns = TREE_OPERAND (fns, 1);
5595 my_friendly_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5596 || TREE_CODE (fns) == OVERLOAD, 20001120);
5597 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5599 if (has_default_arg)
5601 error ("default arguments are not allowed in declaration of friend template specialization `%D'",
5608 error ("`inline' is not allowed in declaration of friend template specialization `%D'",
5616 /* Make the init_value nonzero so pushdecl knows this is not
5617 tentative. error_mark_node is replaced later with the BLOCK. */
5618 DECL_INITIAL (decl) = error_mark_node;
5620 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
5621 TREE_NOTHROW (decl) = 1;
5623 /* Caller will do the rest of this. */
5627 if (flags == NO_SPECIAL && ctype && constructor_name_p (declarator, ctype))
5628 DECL_CONSTRUCTOR_P (decl) = 1;
5630 /* Function gets the ugly name, field gets the nice one. This call
5631 may change the type of the function (because of default
5633 if (ctype != NULL_TREE)
5634 grokclassfn (ctype, decl, flags, quals);
5636 decl = check_explicit_specialization (orig_declarator, decl,
5638 2 * (funcdef_flag != 0) +
5639 4 * (friendp != 0));
5640 if (decl == error_mark_node)
5643 if (ctype != NULL_TREE
5644 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
5649 old_decl = check_classfn (ctype, decl,
5650 (processing_template_decl
5651 > template_class_depth (ctype))
5652 ? current_template_parms
5655 if (old_decl && TREE_CODE (old_decl) == TEMPLATE_DECL)
5656 /* Because grokfndecl is always supposed to return a
5657 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5658 here. We depend on our callers to figure out that its
5659 really a template that's being returned. */
5660 old_decl = DECL_TEMPLATE_RESULT (old_decl);
5662 if (old_decl && DECL_STATIC_FUNCTION_P (old_decl)
5663 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
5664 /* Remove the `this' parm added by grokclassfn.
5665 XXX Isn't this done in start_function, too? */
5666 revert_static_member_fn (decl);
5667 if (old_decl && DECL_ARTIFICIAL (old_decl))
5668 error ("definition of implicitly-declared `%D'", old_decl);
5675 /* Since we've smashed OLD_DECL to its
5676 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5677 if (TREE_CODE (decl) == TEMPLATE_DECL)
5678 decl = DECL_TEMPLATE_RESULT (decl);
5680 /* Attempt to merge the declarations. This can fail, in
5681 the case of some invalid specialization declarations. */
5682 pop_p = push_scope (ctype);
5683 ok = duplicate_decls (decl, old_decl);
5688 error ("no `%#D' member function declared in class `%T'",
5696 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
5699 if (ctype == NULL_TREE || check)
5703 DECL_VIRTUAL_P (decl) = 1;
5708 /* Create a VAR_DECL named NAME with the indicated TYPE.
5710 If SCOPE is non-NULL, it is the class type or namespace containing
5711 the variable. If SCOPE is NULL, the variable should is created in
5712 the innermost enclosings scope. */
5715 grokvardecl (tree type,
5717 const cp_decl_specifier_seq *declspecs,
5724 my_friendly_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE,
5727 /* Compute the scope in which to place the variable. */
5730 /* An explicit "extern" specifier indicates a namespace-scope
5732 if (declspecs->storage_class == sc_extern)
5733 scope = current_namespace;
5734 else if (!at_function_scope_p ())
5736 scope = current_scope ();
5738 scope = current_namespace;
5743 && (/* If the variable is a namespace-scope variable declared in a
5744 template, we need DECL_LANG_SPECIFIC. */
5745 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
5746 /* Similarly for namespace-scope variables with language linkage
5748 || (TREE_CODE (scope) == NAMESPACE_DECL
5749 && current_lang_name != lang_name_cplusplus)
5750 /* Similarly for static data members. */
5752 decl = build_lang_decl (VAR_DECL, name, type);
5754 decl = build_decl (VAR_DECL, name, type);
5756 if (scope && TREE_CODE (scope) == NAMESPACE_DECL)
5757 set_decl_namespace (decl, scope, 0);
5759 DECL_CONTEXT (decl) = scope;
5761 if (declspecs->storage_class == sc_extern)
5763 DECL_THIS_EXTERN (decl) = 1;
5764 DECL_EXTERNAL (decl) = !initialized;
5767 /* In class context, static means one per class,
5768 public access, and static storage. */
5769 if (DECL_CLASS_SCOPE_P (decl))
5771 TREE_PUBLIC (decl) = 1;
5772 TREE_STATIC (decl) = 1;
5773 DECL_EXTERNAL (decl) = 0;
5775 /* At top level, either `static' or no s.c. makes a definition
5776 (perhaps tentative), and absence of `static' makes it public. */
5777 else if (toplevel_bindings_p ())
5779 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
5780 && (DECL_THIS_EXTERN (decl) || ! constp));
5781 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
5783 /* Not at top level, only `static' makes a static definition. */
5786 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
5787 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
5790 if (declspecs->specs[(int)ds_thread])
5792 if (targetm.have_tls)
5793 DECL_THREAD_LOCAL (decl) = 1;
5795 /* A mere warning is sure to result in improper semantics
5796 at runtime. Don't bother to allow this to compile. */
5797 error ("thread-local storage not supported for this target");
5800 if (TREE_PUBLIC (decl))
5802 /* [basic.link]: A name with no linkage (notably, the name of a class
5803 or enumeration declared in a local scope) shall not be used to
5804 declare an entity with linkage.
5806 Only check this for public decls for now. */
5807 tree t = no_linkage_check (TREE_TYPE (decl));
5810 if (TYPE_ANONYMOUS_P (t))
5812 if (DECL_EXTERN_C_P (decl))
5813 /* Allow this; it's pretty common in C. */;
5816 pedwarn ("non-local variable `%#D' uses anonymous type",
5818 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5820 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5825 pedwarn ("non-local variable `%#D' uses local type `%T'",
5833 /* Create and return a canonical pointer to member function type, for
5834 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
5837 build_ptrmemfunc_type (tree type)
5841 tree unqualified_variant = NULL_TREE;
5843 if (type == error_mark_node)
5846 /* If a canonical type already exists for this type, use it. We use
5847 this method instead of type_hash_canon, because it only does a
5848 simple equality check on the list of field members. */
5850 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
5853 /* Make sure that we always have the unqualified pointer-to-member
5855 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
5857 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
5859 t = make_aggr_type (RECORD_TYPE);
5860 xref_basetypes (t, NULL_TREE);
5862 /* Let the front-end know this is a pointer to member function... */
5863 TYPE_PTRMEMFUNC_FLAG (t) = 1;
5864 /* ... and not really an aggregate. */
5865 SET_IS_AGGR_TYPE (t, 0);
5867 field = build_decl (FIELD_DECL, pfn_identifier, type);
5870 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
5871 TREE_CHAIN (field) = fields;
5874 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
5876 /* Zap out the name so that the back-end will give us the debugging
5877 information for this anonymous RECORD_TYPE. */
5878 TYPE_NAME (t) = NULL_TREE;
5880 /* If this is not the unqualified form of this pointer-to-member
5881 type, set the TYPE_MAIN_VARIANT for this type to be the
5882 unqualified type. Since they are actually RECORD_TYPEs that are
5883 not variants of each other, we must do this manually. */
5884 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
5886 t = build_qualified_type (t, cp_type_quals (type));
5887 TYPE_MAIN_VARIANT (t) = unqualified_variant;
5888 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
5889 TYPE_NEXT_VARIANT (unqualified_variant) = t;
5892 /* Cache this pointer-to-member type so that we can find it again
5894 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
5899 /* Create and return a pointer to data member type. */
5902 build_ptrmem_type (tree class_type, tree member_type)
5904 if (TREE_CODE (member_type) == METHOD_TYPE)
5908 arg_types = TYPE_ARG_TYPES (member_type);
5909 class_type = (cp_build_qualified_type
5911 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
5913 = build_method_type_directly (class_type,
5914 TREE_TYPE (member_type),
5915 TREE_CHAIN (arg_types));
5916 return build_ptrmemfunc_type (build_pointer_type (member_type));
5920 my_friendly_assert (TREE_CODE (member_type) != FUNCTION_TYPE,
5922 return build_offset_type (class_type, member_type);
5926 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
5927 Check to see that the definition is valid. Issue appropriate error
5928 messages. Return 1 if the definition is particularly bad, or 0
5932 check_static_variable_definition (tree decl, tree type)
5934 /* Motion 10 at San Diego: If a static const integral data member is
5935 initialized with an integral constant expression, the initializer
5936 may appear either in the declaration (within the class), or in
5937 the definition, but not both. If it appears in the class, the
5938 member is a member constant. The file-scope definition is always
5940 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
5942 error ("invalid in-class initialization of static data member of non-integral type `%T'",
5944 /* If we just return the declaration, crashes will sometimes
5945 occur. We therefore return void_type_node, as if this were a
5946 friend declaration, to cause callers to completely ignore
5947 this declaration. */
5950 else if (!CP_TYPE_CONST_P (type))
5951 error ("ISO C++ forbids in-class initialization of non-const static member `%D'",
5953 else if (pedantic && !INTEGRAL_TYPE_P (type))
5954 pedwarn ("ISO C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl, type);
5959 /* Given the SIZE (i.e., number of elements) in an array, compute an
5960 appropriate index type for the array. If non-NULL, NAME is the
5961 name of the thing being declared. */
5964 compute_array_index_type (tree name, tree size)
5966 tree type = TREE_TYPE (size);
5969 /* The array bound must be an integer type. */
5970 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
5973 error ("size of array `%D' has non-integral type `%T'", name, type);
5975 error ("size of array has non-integral type `%T'", type);
5976 size = integer_one_node;
5977 type = TREE_TYPE (size);
5980 if (abi_version_at_least (2)
5981 /* We should only handle value dependent expressions specially. */
5982 ? value_dependent_expression_p (size)
5983 /* But for abi-1, we handled all instances in templates. This
5984 effects the manglings produced. */
5985 : processing_template_decl)
5986 return build_index_type (build_min (MINUS_EXPR, sizetype,
5987 size, integer_one_node));
5989 /* The size might be the result of a cast. */
5990 STRIP_TYPE_NOPS (size);
5992 /* It might be a const variable or enumeration constant. */
5993 size = decl_constant_value (size);
5995 /* Normally, the array-bound will be a constant. */
5996 if (TREE_CODE (size) == INTEGER_CST)
5998 /* Check to see if the array bound overflowed. Make that an
5999 error, no matter how generous we're being. */
6000 int old_flag_pedantic_errors = flag_pedantic_errors;
6001 int old_pedantic = pedantic;
6002 pedantic = flag_pedantic_errors = 1;
6003 constant_expression_warning (size);
6004 pedantic = old_pedantic;
6005 flag_pedantic_errors = old_flag_pedantic_errors;
6007 /* An array must have a positive number of elements. */
6008 if (INT_CST_LT (size, integer_zero_node))
6011 error ("size of array `%D' is negative", name);
6013 error ("size of array is negative");
6014 size = integer_one_node;
6016 /* As an extension we allow zero-sized arrays. We always allow
6017 them in system headers because glibc uses them. */
6018 else if (integer_zerop (size) && pedantic && !in_system_header)
6021 pedwarn ("ISO C++ forbids zero-size array `%D'", name);
6023 pedwarn ("ISO C++ forbids zero-size array");
6026 else if (TREE_CONSTANT (size))
6028 /* `(int) &fn' is not a valid array bound. */
6030 error ("size of array `%D' is not an integral constant-expression",
6033 error ("size of array is not an integral constant-expression");
6038 pedwarn ("ISO C++ forbids variable-size array `%D'", name);
6040 pedwarn ("ISO C++ forbids variable-size array");
6043 if (processing_template_decl && !TREE_CONSTANT (size))
6044 /* A variable sized array. */
6045 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6048 /* Compute the index of the largest element in the array. It is
6049 one less than the number of elements in the array. */
6051 = fold (cp_build_binary_op (MINUS_EXPR,
6052 cp_convert (ssizetype, size),
6053 cp_convert (ssizetype, integer_one_node)));
6054 if (!TREE_CONSTANT (itype))
6055 /* A variable sized array. */
6056 itype = variable_size (itype);
6057 /* Make sure that there was no overflow when creating to a signed
6058 index type. (For example, on a 32-bit machine, an array with
6059 size 2^32 - 1 is too big.) */
6060 else if (TREE_OVERFLOW (itype))
6062 error ("overflow in array dimension");
6063 TREE_OVERFLOW (itype) = 0;
6067 /* Create and return the appropriate index type. */
6068 return build_index_type (itype);
6071 /* Returns the scope (if any) in which the entity declared by
6072 DECLARATOR will be located. If the entity was declared with an
6073 unqualified name, NULL_TREE is returned. */
6076 get_scope_of_declarator (const cp_declarator *declarator)
6078 while (declarator && declarator->kind != cdk_id)
6079 declarator = declarator->declarator;
6081 /* If the declarator-id is a SCOPE_REF, the scope in which the
6082 declaration occurs is the first operand. */
6084 && declarator->u.id.name
6085 && TREE_CODE (declarator->u.id.name) == SCOPE_REF)
6086 return TREE_OPERAND (declarator->u.id.name, 0);
6088 /* Otherwise, the declarator is not a quablified name; the entity will
6089 be declared in the current scope. */
6093 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6094 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6098 create_array_type_for_decl (tree name, tree type, tree size)
6100 tree itype = NULL_TREE;
6101 const char* error_msg;
6103 /* If things have already gone awry, bail now. */
6104 if (type == error_mark_node || size == error_mark_node)
6105 return error_mark_node;
6107 /* Assume that everything will go OK. */
6110 /* There are some types which cannot be array elements. */
6111 switch (TREE_CODE (type))
6114 error_msg = "array of void";
6118 error_msg = "array of functions";
6121 case REFERENCE_TYPE:
6122 error_msg = "array of references";
6126 error_msg = "array of function members";
6133 /* If something went wrong, issue an error-message and return. */
6137 error ("declaration of `%D' as %s", name, error_msg);
6139 error ("creating %s", error_msg);
6141 return error_mark_node;
6146 The constant expressions that specify the bounds of the arrays
6147 can be omitted only for the first member of the sequence. */
6148 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6151 error ("declaration of `%D' as multidimensional array must have bounds for all dimensions except the first",
6154 error ("multidimensional array must have bounds for all dimensions except the first");
6156 return error_mark_node;
6159 /* Figure out the index type for the array. */
6161 itype = compute_array_index_type (name, size);
6164 T is called the array element type; this type shall not be [...] an
6165 abstract class type. */
6166 abstract_virtuals_error (name, type);
6168 return build_cplus_array_type (type, itype);
6171 /* Check that it's OK to declare a function with the indicated TYPE.
6172 SFK indicates the kind of special function (if any) that this
6173 function is. OPTYPE is the type given in a conversion operator
6174 declaration. Returns the actual return type of the function; that
6175 may be different than TYPE if an error occurs, or for certain
6176 special functions. */
6179 check_special_function_return_type (special_function_kind sfk,
6185 case sfk_constructor:
6187 error ("return type specification for constructor invalid");
6189 type = void_type_node;
6192 case sfk_destructor:
6194 error ("return type specification for destructor invalid");
6195 type = void_type_node;
6198 case sfk_conversion:
6199 if (type && !same_type_p (type, optype))
6200 error ("operator `%T' declared to return `%T'", optype, type);
6202 pedwarn ("return type specified for `operator %T'", optype);
6214 /* Given declspecs and a declarator (abstract or otherwise), determine
6215 the name and type of the object declared and construct a DECL node
6218 DECLSPECS is a chain of tree_list nodes whose value fields
6219 are the storage classes and type specifiers.
6221 DECL_CONTEXT says which syntactic context this declaration is in:
6222 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6223 FUNCDEF for a function definition. Like NORMAL but a few different
6224 error messages in each case. Return value may be zero meaning
6225 this definition is too screwy to try to parse.
6226 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6227 handle member functions (which have FIELD context).
6228 Return value may be zero meaning this definition is too screwy to
6230 PARM for a parameter declaration (either within a function prototype
6231 or before a function body). Make a PARM_DECL, or return void_type_node.
6232 CATCHPARM for a parameter declaration before a catch clause.
6233 TYPENAME if for a typename (in a cast or sizeof).
6234 Don't make a DECL node; just return the ..._TYPE node.
6235 FIELD for a struct or union field; make a FIELD_DECL.
6236 BITFIELD for a field with specified width.
6237 INITIALIZED is 1 if the decl has an initializer.
6239 ATTRLIST is a pointer to the list of attributes, which may be NULL
6240 if there are none; *ATTRLIST may be modified if attributes from inside
6241 the declarator should be applied to the declaration.
6243 When this function is called, scoping variables (such as
6244 CURRENT_CLASS_TYPE) should reflect the scope in which the
6245 declaration occurs, not the scope in which the new declaration will
6246 be placed. For example, on:
6250 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6251 should not be `S'. */
6254 grokdeclarator (const cp_declarator *declarator,
6255 const cp_decl_specifier_seq *declspecs,
6256 enum decl_context decl_context,
6260 tree type = NULL_TREE;
6263 int virtualp, explicitp, friendp, inlinep, staticp;
6264 int explicit_int = 0;
6265 int explicit_char = 0;
6266 int defaulted_int = 0;
6267 tree dependant_name = NULL_TREE;
6269 tree typedef_decl = NULL_TREE;
6270 const char *name = NULL;
6271 tree typedef_type = NULL_TREE;
6272 int funcdef_flag = 0;
6273 cp_declarator_kind innermost_code = cdk_error;
6276 /* See the code below that used this. */
6277 tree decl_attr = NULL_TREE;
6280 /* Keep track of what sort of function is being processed
6281 so that we can warn about default return values, or explicit
6282 return values which do not match prescribed defaults. */
6283 special_function_kind sfk = sfk_none;
6285 tree dname = NULL_TREE;
6286 tree ctor_return_type = NULL_TREE;
6287 enum overload_flags flags = NO_SPECIAL;
6288 cp_cv_quals quals = TYPE_UNQUALIFIED;
6289 tree raises = NULL_TREE;
6290 int template_count = 0;
6291 tree returned_attrs = NULL_TREE;
6292 tree parms = NULL_TREE;
6293 const cp_declarator *id_declarator;
6294 /* The unqualified name of the declarator; either an
6295 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6296 tree unqualified_id;
6297 /* The class type, if any, in which this entity is located,
6298 or NULL_TREE if none. Note that this value may be different from
6299 the current class type; for example if an attempt is made to declare
6300 "A::f" inside "B", this value will be "A". */
6301 tree ctype = current_class_type;
6302 /* The NAMESPACE_DECL for the namespace in which this entity is
6303 located. If an unqualified name is used to declare the entity,
6304 this value will be NULL_TREE, even if the entity is located at
6306 tree in_namespace = NULL_TREE;
6308 cp_storage_class storage_class;
6309 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6311 signed_p = declspecs->specs[(int)ds_signed];
6312 unsigned_p = declspecs->specs[(int)ds_unsigned];
6313 short_p = declspecs->specs[(int)ds_short];
6314 long_p = declspecs->specs[(int)ds_long];
6315 thread_p = declspecs->specs[(int)ds_thread];
6317 if (decl_context == FUNCDEF)
6318 funcdef_flag = 1, decl_context = NORMAL;
6319 else if (decl_context == MEMFUNCDEF)
6320 funcdef_flag = -1, decl_context = FIELD;
6321 else if (decl_context == BITFIELD)
6322 bitfield = 1, decl_context = FIELD;
6324 /* Look inside a declarator for the name being declared
6325 and get it as a string, for an error message. */
6326 for (id_declarator = declarator;
6328 id_declarator = id_declarator->declarator)
6330 if (id_declarator->kind != cdk_id)
6331 innermost_code = id_declarator->kind;
6333 switch (id_declarator->kind)
6336 if (id_declarator->declarator
6337 && id_declarator->declarator->kind == cdk_id)
6339 sfk = id_declarator->declarator->u.id.sfk;
6340 if (sfk == sfk_destructor)
6347 tree decl = id_declarator->u.id.name;
6350 if (TREE_CODE (decl) == SCOPE_REF)
6352 tree qualifying_scope = TREE_OPERAND (decl, 0);
6354 /* It is valid to write:
6356 class C { void f(); };
6360 The standard is not clear about whether `typedef const C D' is
6361 legal; as of 2002-09-15 the committee is considering
6362 that question. EDG 3.0 allows that syntax.
6363 Therefore, we do as well. */
6364 if (qualifying_scope && TYPE_P (qualifying_scope))
6366 ctype = TYPE_MAIN_VARIANT (qualifying_scope);
6367 if (innermost_code != cdk_function
6368 && current_class_type
6369 && !UNIQUELY_DERIVED_FROM_P (ctype,
6370 current_class_type))
6372 error ("type `%T' is not derived from type `%T'",
6373 ctype, current_class_type);
6376 TREE_OPERAND (decl, 0) = ctype;
6378 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6379 in_namespace = qualifying_scope;
6380 decl = TREE_OPERAND (decl, 1);
6382 if (TREE_CODE (decl) == BASELINK)
6383 decl = BASELINK_FUNCTIONS (decl);
6384 if (decl == error_mark_node)
6385 return error_mark_node;
6386 switch (TREE_CODE (decl))
6390 tree type = TREE_OPERAND (decl, 0);
6391 type = constructor_name (type);
6392 name = IDENTIFIER_POINTER (type);
6396 case TEMPLATE_ID_EXPR:
6398 tree fns = TREE_OPERAND (decl, 0);
6401 if (TREE_CODE (dname) == COMPONENT_REF)
6402 dname = TREE_OPERAND (dname, 1);
6403 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6405 my_friendly_assert (is_overloaded_fn (dname),
6407 dname = DECL_NAME (get_first_fn (dname));
6412 case IDENTIFIER_NODE:
6413 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6416 if (C_IS_RESERVED_WORD (dname))
6418 error ("declarator-id missing; using reserved word `%D'",
6420 name = IDENTIFIER_POINTER (dname);
6422 else if (!IDENTIFIER_TYPENAME_P (dname))
6423 name = IDENTIFIER_POINTER (dname);
6426 my_friendly_assert (flags == NO_SPECIAL, 154);
6427 flags = TYPENAME_FLAG;
6428 ctor_return_type = TREE_TYPE (dname);
6429 sfk = sfk_conversion;
6430 if (is_typename_at_global_scope (dname))
6431 name = IDENTIFIER_POINTER (dname);
6433 name = "<invalid operator>";
6438 dname = constructor_name (TREE_TYPE (decl));
6439 name = IDENTIFIER_POINTER (dname);
6460 if (id_declarator->kind == cdk_id)
6464 /* A function definition's declarator must have the form of
6465 a function declarator. */
6467 if (funcdef_flag && innermost_code != cdk_function)
6470 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
6471 && innermost_code != cdk_function
6472 && ! (ctype && !declspecs->any_specifiers_p))
6474 error ("declaration of `%D' as non-function", dname);
6475 return void_type_node;
6478 /* Anything declared one level down from the top level
6479 must be one of the parameters of a function
6480 (because the body is at least two levels down). */
6482 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6483 by not allowing C++ class definitions to specify their parameters
6484 with xdecls (must be spec.d in the parmlist).
6486 Since we now wait to push a class scope until we are sure that
6487 we are in a legitimate method context, we must set oldcname
6488 explicitly (since current_class_name is not yet alive).
6490 We also want to avoid calling this a PARM if it is in a namespace. */
6492 if (decl_context == NORMAL && !toplevel_bindings_p ())
6494 struct cp_binding_level *b = current_binding_level;
6495 current_binding_level = b->level_chain;
6496 if (current_binding_level != 0 && toplevel_bindings_p ())
6497 decl_context = PARM;
6498 current_binding_level = b;
6502 name = decl_context == PARM ? "parameter" : "type name";
6504 /* If there were multiple types specified in the decl-specifier-seq,
6505 issue an error message. */
6506 if (declspecs->multiple_types_p)
6507 error ("two or more data types in declaration of `%s'", name);
6508 /* Extract the basic type from the decl-specifier-seq. */
6509 type = declspecs->type;
6510 if (type == error_mark_node)
6512 /* If the entire declaration is itself tagged as deprecated then
6513 suppress reports of deprecated items. */
6514 if (type && TREE_DEPRECATED (type)
6515 && deprecated_state != DEPRECATED_SUPPRESS)
6516 warn_deprecated_use (type);
6517 if (type && TREE_CODE (type) == TYPE_DECL)
6519 typedef_decl = type;
6520 type = TREE_TYPE (typedef_decl);
6522 /* No type at all: default to `int', and set DEFAULTED_INT
6523 because it was not a user-defined typedef. */
6524 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
6526 /* These imply 'int'. */
6527 type = integer_type_node;
6531 explicit_int = declspecs->explicit_int_p;
6532 explicit_char = declspecs->explicit_char_p;
6534 /* Check for repeated decl-specifiers. */
6535 for (ds = ds_first; ds != ds_last; ++ds)
6537 unsigned count = declspecs->specs[(int)ds];
6540 /* The "long" specifier is a special case because of
6545 error ("`long long long' is too long for GCC");
6546 else if (pedantic && !in_system_header && warn_long_long)
6547 pedwarn ("ISO C++ does not support `long long'");
6551 else if (declspecs->specs[(int)ds] > 1)
6553 static const char *const decl_spec_names[] = {
6569 error ("duplicate `%s'", decl_spec_names[(int)ds]);
6574 /* See the code below that used this. */
6576 decl_attr = DECL_ATTRIBUTES (typedef_decl);
6578 typedef_type = type;
6581 if (sfk != sfk_none)
6582 type = check_special_function_return_type (sfk, type,
6584 else if (type == NULL_TREE)
6590 /* We handle `main' specially here, because 'main () { }' is so
6591 common. With no options, it is allowed. With -Wreturn-type,
6592 it is a warning. It is only an error with -pedantic-errors. */
6593 is_main = (funcdef_flag
6594 && dname && MAIN_NAME_P (dname)
6595 && ctype == NULL_TREE
6596 && in_namespace == NULL_TREE
6597 && current_namespace == global_namespace);
6599 if (in_system_header || flag_ms_extensions)
6600 /* Allow it, sigh. */;
6601 else if (pedantic || ! is_main)
6602 pedwarn ("ISO C++ forbids declaration of `%s' with no type",
6604 else if (warn_return_type)
6605 warning ("ISO C++ forbids declaration of `%s' with no type",
6608 type = integer_type_node;
6613 /* Now process the modifiers that were specified
6614 and check for invalid combinations. */
6616 /* Long double is a special combination. */
6617 if (long_p && TYPE_MAIN_VARIANT (type) == double_type_node)
6620 type = build_qualified_type (long_double_type_node,
6621 cp_type_quals (type));
6624 /* Check all other uses of type modifiers. */
6626 if (unsigned_p || signed_p || long_p || short_p)
6630 if (TREE_CODE (type) == REAL_TYPE)
6631 error ("short, signed or unsigned invalid for `%s'", name);
6632 else if (TREE_CODE (type) != INTEGER_TYPE)
6633 error ("long, short, signed or unsigned invalid for `%s'", name);
6634 else if (long_p && short_p)
6635 error ("long and short specified together for `%s'", name);
6636 else if ((long_p || short_p) && explicit_char)
6637 error ("long or short specified with char for `%s'", name);
6638 else if ((long_p|| short_p) && TREE_CODE (type) == REAL_TYPE)
6639 error ("long or short specified with floating type for `%s'", name);
6640 else if (signed_p && unsigned_p)
6641 error ("signed and unsigned given together for `%s'", name);
6645 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
6647 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
6649 if (flag_pedantic_errors)
6654 /* Discard the type modifiers if they are invalid. */
6665 /* Decide whether an integer type is signed or not.
6666 Optionally treat bitfields as signed by default. */
6670 It is implementation-defined whether a plain (neither
6671 explicitly signed or unsigned) char, short, int, or long
6672 bit-field is signed or unsigned.
6674 Naturally, we extend this to long long as well. Note that
6675 this does not include wchar_t. */
6676 || (bitfield && !flag_signed_bitfields
6678 /* A typedef for plain `int' without `signed' can be
6679 controlled just like plain `int', but a typedef for
6680 `signed int' cannot be so controlled. */
6682 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
6683 && (TREE_CODE (type) == INTEGER_TYPE
6684 || TREE_CODE (type) == CHAR_TYPE)
6685 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
6688 type = long_long_unsigned_type_node;
6690 type = long_unsigned_type_node;
6692 type = short_unsigned_type_node;
6693 else if (type == char_type_node)
6694 type = unsigned_char_type_node;
6695 else if (typedef_decl)
6696 type = c_common_unsigned_type (type);
6698 type = unsigned_type_node;
6700 else if (signed_p && type == char_type_node)
6701 type = signed_char_type_node;
6703 type = long_long_integer_type_node;
6705 type = long_integer_type_node;
6707 type = short_integer_type_node;
6709 if (declspecs->specs[(int)ds_complex])
6711 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
6712 error ("complex invalid for `%s'", name);
6713 /* If we just have "complex", it is equivalent to
6714 "complex double", but if any modifiers at all are specified it is
6715 the complex form of TYPE. E.g, "complex short" is
6716 "complex short int". */
6718 else if (defaulted_int && ! longlong
6719 && ! (long_p || short_p || signed_p || unsigned_p))
6720 type = complex_double_type_node;
6721 else if (type == integer_type_node)
6722 type = complex_integer_type_node;
6723 else if (type == float_type_node)
6724 type = complex_float_type_node;
6725 else if (type == double_type_node)
6726 type = complex_double_type_node;
6727 else if (type == long_double_type_node)
6728 type = complex_long_double_type_node;
6730 type = build_complex_type (type);
6733 type_quals = TYPE_UNQUALIFIED;
6734 if (declspecs->specs[(int)ds_const])
6735 type_quals |= TYPE_QUAL_CONST;
6736 if (declspecs->specs[(int)ds_volatile])
6737 type_quals |= TYPE_QUAL_VOLATILE;
6738 if (declspecs->specs[(int)ds_restrict])
6739 type_quals |= TYPE_QUAL_RESTRICT;
6740 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
6741 error ("qualifiers are not allowed on declaration of `operator %T'",
6744 type_quals |= cp_type_quals (type);
6745 type = cp_build_qualified_type_real
6746 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
6747 ? tf_ignore_bad_quals : 0) | tf_error | tf_warning));
6748 /* We might have ignored or rejected some of the qualifiers. */
6749 type_quals = cp_type_quals (type);
6752 inlinep = !! declspecs->specs[(int)ds_inline];
6753 virtualp = !! declspecs->specs[(int)ds_virtual];
6754 explicitp = !! declspecs->specs[(int)ds_explicit];
6756 storage_class = declspecs->storage_class;
6757 if (storage_class == sc_static)
6758 staticp = 1 + (decl_context == FIELD);
6760 if (virtualp && staticp == 2)
6762 error ("member `%D' cannot be declared both virtual and static",
6766 friendp = !! declspecs->specs[(int)ds_friend];
6768 if (dependant_name && !friendp)
6770 error ("`%T::%D' is not a valid declarator", ctype, dependant_name);
6771 return void_type_node;
6774 /* Issue errors about use of storage classes for parameters. */
6775 if (decl_context == PARM)
6777 if (declspecs->specs[(int)ds_typedef])
6778 error ("typedef declaration invalid in parameter declaration");
6779 else if (storage_class == sc_static
6780 || storage_class == sc_extern
6782 error ("storage class specifiers invalid in parameter declarations");
6785 /* Give error if `virtual' is used outside of class declaration. */
6787 && (current_class_name == NULL_TREE || decl_context != FIELD))
6789 error ("virtual outside class declaration");
6793 /* Static anonymous unions are dealt with here. */
6794 if (staticp && decl_context == TYPENAME
6796 && ANON_AGGR_TYPE_P (declspecs->type))
6797 decl_context = FIELD;
6799 /* Warn about storage classes that are invalid for certain
6800 kinds of declarations (parameters, typenames, etc.). */
6801 if (declspecs->multiple_storage_classes_p)
6802 error ("multiple storage classes in declaration of `%s'", name);
6805 && storage_class != sc_extern
6806 && storage_class != sc_static)
6807 || declspecs->specs[(int)ds_typedef]))
6809 error ("multiple storage classes in declaration of `%s'", name);
6812 else if (decl_context != NORMAL
6813 && ((storage_class != sc_none
6814 && storage_class != sc_mutable)
6817 if ((decl_context == PARM || decl_context == CATCHPARM)
6818 && (storage_class == sc_register
6819 || storage_class == sc_auto))
6821 else if (declspecs->specs[(int)ds_typedef])
6823 else if (decl_context == FIELD
6824 /* C++ allows static class elements. */
6825 && storage_class == sc_static)
6826 /* C++ also allows inlines and signed and unsigned elements,
6827 but in those cases we don't come in here. */
6831 if (decl_context == FIELD)
6833 tree tmp = NULL_TREE;
6838 /* Avoid trying to get an operand off an identifier node. */
6839 if (declarator->kind != cdk_id)
6840 tmp = declarator->declarator->u.id.name;
6842 tmp = declarator->u.id.name;
6843 op = IDENTIFIER_OPNAME_P (tmp);
6844 if (IDENTIFIER_TYPENAME_P (tmp))
6846 if (is_typename_at_global_scope (tmp))
6847 name = IDENTIFIER_POINTER (tmp);
6849 name = "<invalid operator>";
6852 error ("storage class specified for %s `%s'",
6853 op ? "member operator" : "field",
6858 if (decl_context == PARM || decl_context == CATCHPARM)
6859 error ("storage class specified for parameter `%s'", name);
6861 error ("storage class specified for typename");
6863 if (storage_class == sc_register
6864 || storage_class == sc_auto
6865 || storage_class == sc_extern
6867 storage_class = sc_none;
6870 else if (storage_class == sc_extern && initialized
6873 if (toplevel_bindings_p ())
6875 /* It's common practice (and completely valid) to have a const
6876 be initialized and declared extern. */
6877 if (!(type_quals & TYPE_QUAL_CONST))
6878 warning ("`%s' initialized and declared `extern'", name);
6881 error ("`%s' has both `extern' and initializer", name);
6883 else if (storage_class == sc_extern && funcdef_flag
6884 && ! toplevel_bindings_p ())
6885 error ("nested function `%s' declared `extern'", name);
6886 else if (toplevel_bindings_p ())
6888 if (storage_class == sc_auto)
6889 error ("top-level declaration of `%s' specifies `auto'", name);
6892 && storage_class != sc_extern
6893 && storage_class != sc_static)
6895 error ("function-scope `%s' implicitly auto and declared `__thread'",
6900 if (storage_class && friendp)
6901 error ("storage class specifiers invalid in friend function declarations");
6904 unqualified_id = NULL_TREE;
6907 unqualified_id = id_declarator->u.id.name;
6908 if (TREE_CODE (unqualified_id) == SCOPE_REF)
6909 unqualified_id = TREE_OPERAND (unqualified_id, 1);
6910 if (TREE_CODE (unqualified_id) == BASELINK)
6911 unqualified_id = BASELINK_FUNCTIONS (unqualified_id);
6912 switch (TREE_CODE (unqualified_id))
6916 = constructor_name (TREE_OPERAND (unqualified_id, 0));
6921 = constructor_name (TREE_TYPE (unqualified_id));
6924 case IDENTIFIER_NODE:
6925 case TEMPLATE_ID_EXPR:
6933 /* Determine the type of the entity declared by recurring on the
6936 declarator && declarator->kind != cdk_id;
6937 declarator = declarator->declarator)
6939 const cp_declarator *inner_declarator;
6942 if (type == error_mark_node)
6943 return error_mark_node;
6945 inner_declarator = declarator->declarator;
6947 attrs = declarator->attributes;
6953 if (declarator == NULL || declarator->kind == cdk_id)
6954 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
6955 if (declarator->kind == cdk_function)
6956 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
6957 if (declarator->kind == cdk_array)
6958 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
6959 returned_attrs = decl_attributes (&type,
6960 chainon (returned_attrs, attrs),
6964 switch (declarator->kind)
6967 type = create_array_type_for_decl (dname, type,
6968 declarator->u.array.bounds);
6969 if (inner_declarator
6970 && (inner_declarator->kind == cdk_pointer
6971 || inner_declarator->kind == cdk_reference
6972 || inner_declarator->kind == cdk_ptrmem))
6973 /* We can never complete an array type which is the
6974 target of a pointer, so go ahead and lay it out. */
6983 /* Declaring a function type.
6984 Make sure we have a valid type for the function to return. */
6986 /* We now know that the TYPE_QUALS don't apply to the
6987 decl, but to its return type. */
6988 type_quals = TYPE_UNQUALIFIED;
6990 /* Warn about some types functions can't return. */
6992 if (TREE_CODE (type) == FUNCTION_TYPE)
6994 error ("`%s' declared as function returning a function", name);
6995 type = integer_type_node;
6997 if (TREE_CODE (type) == ARRAY_TYPE)
6999 error ("`%s' declared as function returning an array", name);
7000 type = integer_type_node;
7003 /* Pick up type qualifiers which should be applied to `this'. */
7004 quals = declarator->u.function.qualifiers;
7006 /* Pick up the exception specifications. */
7007 raises = declarator->u.function.exception_specification;
7009 /* Say it's a definition only for the CALL_EXPR
7010 closest to the identifier. */
7011 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7013 if (ctype == NULL_TREE
7014 && decl_context == FIELD
7016 && (friendp == 0 || dname == current_class_name))
7017 ctype = current_class_type;
7019 if (ctype && sfk == sfk_conversion)
7020 TYPE_HAS_CONVERSION (ctype) = 1;
7021 if (ctype && (sfk == sfk_constructor
7022 || sfk == sfk_destructor))
7024 /* We are within a class's scope. If our declarator name
7025 is the same as the class name, and we are defining
7026 a function, then it is a constructor/destructor, and
7027 therefore returns a void type. */
7029 if (flags == DTOR_FLAG)
7031 /* ISO C++ 12.4/2. A destructor may not be
7032 declared const or volatile. A destructor may
7035 error ("destructor cannot be static member function");
7038 error ("destructors may not be cv-qualified");
7039 quals = TYPE_UNQUALIFIED;
7041 if (decl_context == FIELD)
7043 if (! member_function_or_else (ctype,
7046 return void_type_node;
7049 else /* It's a constructor. */
7053 /* ISO C++ 12.1. A constructor may not be
7054 declared const or volatile. A constructor may
7055 not be virtual. A constructor may not be
7058 error ("constructor cannot be static member function");
7061 pedwarn ("constructors cannot be declared virtual");
7066 error ("constructors may not be cv-qualified");
7067 quals = TYPE_UNQUALIFIED;
7069 if (decl_context == FIELD)
7071 if (! member_function_or_else (ctype,
7074 return void_type_node;
7075 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
7076 if (sfk != sfk_constructor)
7080 if (decl_context == FIELD)
7086 error ("can't initialize friend function `%s'", name);
7089 /* Cannot be both friend and virtual. */
7090 error ("virtual functions cannot be friends");
7093 if (decl_context == NORMAL)
7094 error ("friend declaration not in class definition");
7095 if (current_function_decl && funcdef_flag)
7096 error ("can't define friend function `%s' in a local class definition",
7100 arg_types = grokparms (declarator->u.function.parameters,
7103 if (inner_declarator
7104 && inner_declarator->kind == cdk_id
7105 && inner_declarator->u.id.sfk == sfk_destructor
7106 && arg_types != void_list_node)
7108 error ("destructors may not have parameters");
7109 arg_types = void_list_node;
7113 type = build_function_type (type, arg_types);
7120 /* Filter out pointers-to-references and references-to-references.
7121 We can get these if a TYPE_DECL is used. */
7123 if (TREE_CODE (type) == REFERENCE_TYPE)
7125 error (declarator->kind == cdk_reference
7126 ? "cannot declare reference to `%#T'"
7127 : "cannot declare pointer to `%#T'", type);
7128 type = TREE_TYPE (type);
7130 else if (VOID_TYPE_P (type))
7132 if (declarator->kind == cdk_reference)
7133 error ("cannot declare reference to `%#T'", type);
7134 else if (declarator->kind == cdk_ptrmem)
7135 error ("cannot declare pointer to `%#T' member", type);
7138 /* We now know that the TYPE_QUALS don't apply to the decl,
7139 but to the target of the pointer. */
7140 type_quals = TYPE_UNQUALIFIED;
7142 if (declarator->kind == cdk_ptrmem
7143 && (TREE_CODE (type) == FUNCTION_TYPE
7144 || (quals && TREE_CODE (type) == METHOD_TYPE)))
7146 tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
7147 grok_method_quals (declarator->u.pointer.class_type,
7149 type = TREE_TYPE (dummy);
7150 quals = TYPE_UNQUALIFIED;
7153 if (declarator->kind == cdk_reference)
7155 if (!VOID_TYPE_P (type))
7156 type = build_reference_type (type);
7158 else if (TREE_CODE (type) == METHOD_TYPE)
7159 type = build_ptrmemfunc_type (build_pointer_type (type));
7160 else if (declarator->kind == cdk_ptrmem)
7161 type = build_ptrmem_type (declarator->u.pointer.class_type,
7164 type = build_pointer_type (type);
7166 /* Process a list of type modifier keywords (such as
7167 const or volatile) that were given inside the `*' or `&'. */
7169 if (declarator->u.pointer.qualifiers)
7172 = cp_build_qualified_type (type,
7173 declarator->u.pointer.qualifiers);
7174 type_quals = cp_type_quals (type);
7187 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7188 && TREE_CODE (type) != FUNCTION_TYPE
7189 && TREE_CODE (type) != METHOD_TYPE)
7191 error ("template-id `%D' used as a declarator",
7193 unqualified_id = dname;
7196 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7197 otherwise, we would not have exited the loop above. */
7199 && TREE_CODE (declarator->u.id.name) == SCOPE_REF
7200 /* If the qualifying scope was invalid, it will have been set to
7202 && TREE_OPERAND (declarator->u.id.name, 0)
7203 && TYPE_P (TREE_OPERAND (declarator->u.id.name, 0)))
7207 ctype = TREE_OPERAND (declarator->u.id.name, 0);
7209 ctype = TYPE_MAIN_VARIANT (ctype);
7211 while (t != NULL_TREE && CLASS_TYPE_P (t))
7213 /* You're supposed to have one `template <...>' for every
7214 template class, but you don't need one for a full
7215 specialization. For example:
7217 template <class T> struct S{};
7218 template <> struct S<int> { void f(); };
7219 void S<int>::f () {}
7221 is correct; there shouldn't be a `template <>' for the
7222 definition of `S<int>::f'. */
7223 if (CLASSTYPE_TEMPLATE_INFO (t)
7224 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t)
7225 || uses_template_parms (CLASSTYPE_TI_ARGS (t)))
7226 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7227 template_count += 1;
7229 t = TYPE_MAIN_DECL (t);
7230 t = DECL_CONTEXT (t);
7233 if (ctype == current_class_type)
7239 Is this ill-formed? */
7242 pedwarn ("extra qualification `%T::' on member `%s' ignored",
7245 else if (TREE_CODE (type) == FUNCTION_TYPE)
7247 tree sname = TREE_OPERAND (declarator->u.id.name, 1);
7249 if (TREE_CODE (sname) == IDENTIFIER_NODE
7250 && NEW_DELETE_OPNAME_P (sname))
7251 /* Overloaded operator new and operator delete
7252 are always static functions. */
7254 else if (current_class_type == NULL_TREE || friendp)
7256 = build_method_type_directly (ctype,
7258 TYPE_ARG_TYPES (type));
7261 error ("cannot declare member function `%T::%s' within `%T'",
7262 ctype, name, current_class_type);
7263 return error_mark_node;
7266 else if (declspecs->specs[(int)ds_typedef]
7267 || COMPLETE_TYPE_P (complete_type (ctype)))
7269 /* Have to move this code elsewhere in this function.
7270 this code is used for i.e., typedef int A::M; M *pm;
7272 It is? How? jason 10/2/94 */
7274 if (current_class_type)
7276 error ("cannot declare member `%T::%s' within `%T'",
7277 ctype, name, current_class_type);
7278 return void_type_node;
7283 cxx_incomplete_type_error (NULL_TREE, ctype);
7284 return error_mark_node;
7291 *attrlist = chainon (returned_attrs, *attrlist);
7293 attrlist = &returned_attrs;
7296 /* Now TYPE has the actual type. */
7298 /* Did array size calculations overflow? */
7300 if (TREE_CODE (type) == ARRAY_TYPE
7301 && COMPLETE_TYPE_P (type)
7302 && TREE_OVERFLOW (TYPE_SIZE (type)))
7304 error ("size of array `%s' is too large", name);
7305 /* If we proceed with the array type as it is, we'll eventually
7306 crash in tree_low_cst(). */
7307 type = error_mark_node;
7310 if ((decl_context == FIELD || decl_context == PARM)
7311 && !processing_template_decl
7312 && variably_modified_type_p (type, NULL_TREE))
7314 if (decl_context == FIELD)
7315 error ("data member may not have variably modified type `%T'", type);
7317 error ("parameter may not have variably modified type `%T'", type);
7318 type = error_mark_node;
7321 if (explicitp == 1 || (explicitp && friendp))
7323 /* [dcl.fct.spec] The explicit specifier shall only be used in
7324 declarations of constructors within a class definition. */
7325 error ("only declarations of constructors can be `explicit'");
7329 if (storage_class == sc_mutable)
7331 if (decl_context != FIELD || friendp)
7333 error ("non-member `%s' cannot be declared `mutable'", name);
7334 storage_class = sc_none;
7336 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7338 error ("non-object member `%s' cannot be declared `mutable'", name);
7339 storage_class = sc_none;
7341 else if (TREE_CODE (type) == FUNCTION_TYPE
7342 || TREE_CODE (type) == METHOD_TYPE)
7344 error ("function `%s' cannot be declared `mutable'", name);
7345 storage_class = sc_none;
7349 error ("static `%s' cannot be declared `mutable'", name);
7350 storage_class = sc_none;
7352 else if (type_quals & TYPE_QUAL_CONST)
7354 error ("const `%s' cannot be declared `mutable'", name);
7355 storage_class = sc_none;
7359 /* If this is declaring a typedef name, return a TYPE_DECL. */
7360 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7364 /* Note that the grammar rejects storage classes
7365 in typenames, fields or parameters. */
7366 if (current_lang_name == lang_name_java)
7367 TYPE_FOR_JAVA (type) = 1;
7369 if (decl_context == FIELD)
7371 if (constructor_name_p (unqualified_id, current_class_type))
7372 pedwarn ("ISO C++ forbids nested type `%D' with same name as enclosing class",
7374 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7378 decl = build_decl (TYPE_DECL, unqualified_id, type);
7379 if (in_namespace || ctype)
7380 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7381 if (!current_function_decl)
7382 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7385 /* If the user declares "typedef struct {...} foo" then the
7386 struct will have an anonymous name. Fill that name in now.
7387 Nothing can refer to it, so nothing needs know about the name
7389 if (type != error_mark_node
7392 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7393 && TYPE_ANONYMOUS_P (type)
7394 /* Don't do this if there are attributes. */
7395 && (!attrlist || !*attrlist)
7396 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7398 tree oldname = TYPE_NAME (type);
7401 /* Replace the anonymous name with the real name everywhere. */
7402 lookup_tag_reverse (type, unqualified_id);
7403 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7404 if (TYPE_NAME (t) == oldname)
7405 TYPE_NAME (t) = decl;
7407 if (TYPE_LANG_SPECIFIC (type))
7408 TYPE_WAS_ANONYMOUS (type) = 1;
7410 /* If this is a typedef within a template class, the nested
7411 type is a (non-primary) template. The name for the
7412 template needs updating as well. */
7413 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7414 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7415 = TYPE_IDENTIFIER (type);
7417 /* FIXME remangle member functions; member functions of a
7418 type with external linkage have external linkage. */
7423 if (ctype == NULL_TREE)
7425 if (TREE_CODE (type) != METHOD_TYPE)
7426 error ("%Jinvalid type qualifier for non-member function type",
7429 ctype = TYPE_METHOD_BASETYPE (type);
7431 if (ctype != NULL_TREE)
7432 grok_method_quals (ctype, decl, quals);
7436 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7437 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7439 bad_specifiers (decl, "type", virtualp, quals != TYPE_UNQUALIFIED,
7440 inlinep, friendp, raises != NULL_TREE);
7445 /* Detect the case of an array type of unspecified size
7446 which came, as such, direct from a typedef name.
7447 We must copy the type, so that the array's domain can be
7448 individually set by the object's initializer. */
7450 if (type && typedef_type
7451 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7452 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7453 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7455 /* Detect where we're using a typedef of function type to declare a
7456 function. PARMS will not be set, so we must create it now. */
7458 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
7460 tree decls = NULL_TREE;
7463 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
7465 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
7467 TREE_CHAIN (decl) = decls;
7471 parms = nreverse (decls);
7474 /* If this is a type name (such as, in a cast or sizeof),
7475 compute the type and return it now. */
7477 if (decl_context == TYPENAME)
7479 /* Note that the grammar rejects storage classes
7480 in typenames, fields or parameters. */
7481 if (type_quals != TYPE_UNQUALIFIED)
7482 type_quals = TYPE_UNQUALIFIED;
7484 /* Special case: "friend class foo" looks like a TYPENAME context. */
7487 if (type_quals != TYPE_UNQUALIFIED)
7489 error ("type qualifiers specified for friend class declaration");
7490 type_quals = TYPE_UNQUALIFIED;
7494 error ("`inline' specified for friend class declaration");
7500 /* Don't allow friend declaration without a class-key. */
7501 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
7502 pedwarn ("template parameters cannot be friends");
7503 else if (TREE_CODE (type) == TYPENAME_TYPE)
7504 pedwarn ("friend declaration requires class-key, "
7505 "i.e. `friend class %T::%D'",
7506 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
7508 pedwarn ("friend declaration requires class-key, "
7509 "i.e. `friend %#T'",
7513 /* Only try to do this stuff if we didn't already give up. */
7514 if (type != integer_type_node)
7516 /* A friendly class? */
7517 if (current_class_type)
7518 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
7521 error ("trying to make class `%T' a friend of global scope",
7524 type = void_type_node;
7529 if (ctype == NULL_TREE)
7531 if (TREE_CODE (type) != METHOD_TYPE)
7532 error ("invalid qualifiers on non-member function type");
7534 ctype = TYPE_METHOD_BASETYPE (type);
7538 tree dummy = build_decl (TYPE_DECL, unqualified_id, type);
7539 grok_method_quals (ctype, dummy, quals);
7540 type = TREE_TYPE (dummy);
7546 else if (unqualified_id == NULL_TREE && decl_context != PARM
7547 && decl_context != CATCHPARM
7548 && TREE_CODE (type) != UNION_TYPE
7551 error ("abstract declarator `%T' used as declaration", type);
7552 unqualified_id = make_anon_name ();
7555 /* `void' at top level (not within pointer)
7556 is allowed only in typedefs or type names.
7557 We don't complain about parms either, but that is because
7558 a better error message can be made later. */
7560 if (TREE_CODE (type) == VOID_TYPE && decl_context != PARM)
7562 if (! unqualified_id)
7563 error ("unnamed variable or field declared void");
7564 else if (TREE_CODE (unqualified_id) == IDENTIFIER_NODE)
7566 if (IDENTIFIER_OPNAME_P (unqualified_id))
7569 error ("variable or field `%s' declared void", name);
7572 error ("variable or field declared void");
7573 type = integer_type_node;
7576 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7577 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7579 if (decl_context == PARM || decl_context == CATCHPARM)
7581 if (ctype || in_namespace)
7582 error ("cannot use `::' in parameter declaration");
7584 /* A parameter declared as an array of T is really a pointer to T.
7585 One declared as a function is really a pointer to a function.
7586 One declared as a member is really a pointer to member. */
7588 if (TREE_CODE (type) == ARRAY_TYPE)
7590 /* Transfer const-ness of array into that of type pointed to. */
7591 type = build_pointer_type (TREE_TYPE (type));
7592 type_quals = TYPE_UNQUALIFIED;
7594 else if (TREE_CODE (type) == FUNCTION_TYPE)
7595 type = build_pointer_type (type);
7601 if (decl_context == PARM)
7603 decl = cp_build_parm_decl (unqualified_id, type);
7605 bad_specifiers (decl, "parameter", virtualp, quals != TYPE_UNQUALIFIED,
7606 inlinep, friendp, raises != NULL_TREE);
7608 else if (decl_context == FIELD)
7610 /* The C99 flexible array extension. */
7611 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
7612 && TYPE_DOMAIN (type) == NULL_TREE)
7614 tree itype = compute_array_index_type (dname, integer_zero_node);
7615 type = build_cplus_array_type (TREE_TYPE (type), itype);
7618 if (type == error_mark_node)
7620 /* Happens when declaring arrays of sizes which
7621 are error_mark_node, for example. */
7624 else if (in_namespace && !friendp)
7626 /* Something like struct S { int N::j; }; */
7627 error ("invalid use of `::'");
7630 else if (TREE_CODE (type) == FUNCTION_TYPE)
7633 tree function_context;
7635 /* We catch the others as conflicts with the builtin
7637 if (friendp && unqualified_id == ridpointers[(int) RID_SIGNED])
7639 error ("function `%D' cannot be declared friend",
7646 if (ctype == NULL_TREE)
7647 ctype = current_class_type;
7649 if (ctype == NULL_TREE)
7651 error ("can't make `%D' into a method -- not in a class",
7653 return void_type_node;
7656 /* ``A union may [ ... ] not [ have ] virtual functions.''
7658 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
7660 error ("function `%D' declared virtual inside a union",
7662 return void_type_node;
7665 if (NEW_DELETE_OPNAME_P (unqualified_id))
7669 error ("`%D' cannot be declared virtual, since it is always static",
7674 else if (staticp < 2)
7675 type = build_method_type_directly (ctype,
7677 TYPE_ARG_TYPES (type));
7680 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7681 function_context = (ctype != NULL_TREE) ?
7682 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
7683 publicp = (! friendp || ! staticp)
7684 && function_context == NULL_TREE;
7685 decl = grokfndecl (ctype, type,
7686 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7687 ? unqualified_id : dname,
7690 virtualp, flags, quals, raises,
7691 friendp ? -1 : 0, friendp, publicp, inlinep,
7692 funcdef_flag, template_count, in_namespace);
7693 if (decl == NULL_TREE)
7696 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7697 /* The decl and setting of decl_attr is also turned off. */
7698 decl = build_decl_attribute_variant (decl, decl_attr);
7701 /* [class.conv.ctor]
7703 A constructor declared without the function-specifier
7704 explicit that can be called with a single parameter
7705 specifies a conversion from the type of its first
7706 parameter to the type of its class. Such a constructor
7707 is called a converting constructor. */
7709 DECL_NONCONVERTING_P (decl) = 1;
7710 else if (DECL_CONSTRUCTOR_P (decl))
7712 /* The constructor can be called with exactly one
7713 parameter if there is at least one parameter, and
7714 any subsequent parameters have default arguments.
7715 Ignore any compiler-added parms. */
7716 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
7718 if (arg_types == void_list_node
7720 && TREE_CHAIN (arg_types)
7721 && TREE_CHAIN (arg_types) != void_list_node
7722 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
7723 DECL_NONCONVERTING_P (decl) = 1;
7726 else if (TREE_CODE (type) == METHOD_TYPE)
7728 /* We only get here for friend declarations of
7729 members of other classes. */
7730 /* All method decls are public, so tell grokfndecl to set
7731 TREE_PUBLIC, also. */
7732 decl = grokfndecl (ctype, type,
7733 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7734 ? unqualified_id : dname,
7737 virtualp, flags, quals, raises,
7738 friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
7739 template_count, in_namespace);
7740 if (decl == NULL_TREE)
7743 else if (!staticp && !dependent_type_p (type)
7744 && !COMPLETE_TYPE_P (complete_type (type))
7745 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
7748 error ("field `%D' has incomplete type", unqualified_id);
7750 error ("name `%T' has incomplete type", type);
7752 /* If we're instantiating a template, tell them which
7753 instantiation made the field's type be incomplete. */
7754 if (current_class_type
7755 && TYPE_NAME (current_class_type)
7756 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
7758 && declspecs->type == type)
7759 error (" in instantiation of template `%T'",
7760 current_class_type);
7762 type = error_mark_node;
7769 error ("`%E' is neither function nor member function; "
7770 "cannot be declared friend", unqualified_id);
7778 /* Friends are treated specially. */
7779 if (ctype == current_class_type)
7780 warning ("member functions are implicitly friends of their class");
7781 else if (decl && DECL_NAME (decl))
7783 if (template_class_depth (current_class_type) == 0)
7785 decl = check_explicit_specialization
7786 (unqualified_id, decl, template_count,
7787 2 * (funcdef_flag != 0) + 4);
7788 if (decl == error_mark_node)
7789 return error_mark_node;
7792 decl = do_friend (ctype, unqualified_id, decl,
7793 *attrlist, flags, quals, funcdef_flag);
7797 return void_type_node;
7800 /* Structure field. It may not be a function, except for C++. */
7802 if (decl == NULL_TREE)
7808 /* An attempt is being made to initialize a non-static
7809 member. But, from [class.mem]:
7811 4 A member-declarator can contain a
7812 constant-initializer only if it declares a static
7813 member (_class.static_) of integral or enumeration
7814 type, see _class.static.data_.
7816 This used to be relatively common practice, but
7817 the rest of the compiler does not correctly
7818 handle the initialization unless the member is
7819 static so we make it static below. */
7820 pedwarn ("ISO C++ forbids initialization of member `%D'",
7822 pedwarn ("making `%D' static", unqualified_id);
7826 if (uses_template_parms (type))
7827 /* We'll check at instantiation time. */
7829 else if (check_static_variable_definition (unqualified_id,
7831 /* If we just return the declaration, crashes
7832 will sometimes occur. We therefore return
7833 void_type_node, as if this was a friend
7834 declaration, to cause callers to completely
7835 ignore this declaration. */
7836 return void_type_node;
7841 /* C++ allows static class members. All other work
7842 for this is done by grokfield. */
7843 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
7844 TREE_STATIC (decl) = 1;
7845 /* In class context, 'static' means public access. */
7846 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl) = 1;
7850 decl = build_decl (FIELD_DECL, unqualified_id, type);
7851 DECL_NONADDRESSABLE_P (decl) = bitfield;
7852 if (storage_class == sc_mutable)
7854 DECL_MUTABLE_P (decl) = 1;
7855 storage_class = sc_none;
7859 bad_specifiers (decl, "field", virtualp, quals != TYPE_UNQUALIFIED,
7860 inlinep, friendp, raises != NULL_TREE);
7863 else if (TREE_CODE (type) == FUNCTION_TYPE
7864 || TREE_CODE (type) == METHOD_TYPE)
7869 if (!unqualified_id)
7872 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
7873 original_name = dname;
7875 original_name = unqualified_id;
7877 if (storage_class == sc_auto)
7878 error ("storage class `auto' invalid for function `%s'", name);
7879 else if (storage_class == sc_register)
7880 error ("storage class `register' invalid for function `%s'", name);
7882 error ("storage class `__thread' invalid for function `%s'", name);
7884 /* Function declaration not at top level.
7885 Storage classes other than `extern' are not allowed
7886 and `extern' makes no difference. */
7887 if (! toplevel_bindings_p ()
7888 && (storage_class == sc_static
7889 || declspecs->specs[(int)ds_inline])
7892 if (storage_class == sc_static)
7893 pedwarn ("`static' specified invalid for function `%s' declared out of global scope", name);
7895 pedwarn ("`inline' specifier invalid for function `%s' declared out of global scope", name);
7898 if (ctype == NULL_TREE)
7902 error ("virtual non-class function `%s'", name);
7906 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
7907 && !NEW_DELETE_OPNAME_P (original_name))
7908 type = build_method_type_directly (ctype,
7910 TYPE_ARG_TYPES (type));
7912 /* Record presence of `static'. */
7913 publicp = (ctype != NULL_TREE
7914 || storage_class == sc_extern
7915 || storage_class != sc_static);
7917 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
7918 virtualp, flags, quals, raises,
7920 publicp, inlinep, funcdef_flag,
7921 template_count, in_namespace);
7922 if (decl == NULL_TREE)
7927 int invalid_static = 0;
7929 /* Don't allow a static member function in a class, and forbid
7930 declaring main to be static. */
7931 if (TREE_CODE (type) == METHOD_TYPE)
7933 pedwarn ("cannot declare member function `%D' to have static linkage", decl);
7936 else if (current_function_decl)
7938 /* FIXME need arm citation */
7939 error ("cannot declare static function inside another function");
7946 storage_class = sc_none;
7952 /* It's a variable. */
7954 /* An uninitialized decl with `extern' is a reference. */
7955 decl = grokvardecl (type, unqualified_id,
7958 (type_quals & TYPE_QUAL_CONST) != 0,
7959 ctype ? ctype : in_namespace);
7960 bad_specifiers (decl, "variable", virtualp, quals != TYPE_UNQUALIFIED,
7961 inlinep, friendp, raises != NULL_TREE);
7965 DECL_CONTEXT (decl) = ctype;
7968 pedwarn ("`static' may not be used when defining (as opposed to declaring) a static data member");
7970 storage_class = sc_none;
7972 if (storage_class == sc_register && TREE_STATIC (decl))
7974 error ("static member `%D' declared `register'", decl);
7975 storage_class = sc_none;
7977 if (storage_class == sc_extern && pedantic)
7979 pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
7981 storage_class = sc_none;
7986 /* Record `register' declaration for warnings on &
7987 and in case doing stupid register allocation. */
7989 if (storage_class == sc_register)
7990 DECL_REGISTER (decl) = 1;
7991 else if (storage_class == sc_extern)
7992 DECL_THIS_EXTERN (decl) = 1;
7993 else if (storage_class == sc_static)
7994 DECL_THIS_STATIC (decl) = 1;
7996 /* Record constancy and volatility. There's no need to do this
7997 when processing a template; we'll do this for the instantiated
7998 declaration based on the type of DECL. */
7999 if (!processing_template_decl)
8000 c_apply_type_quals_to_decl (type_quals, decl);
8006 /* Subroutine of start_function. Ensure that each of the parameter
8007 types (as listed in PARMS) is complete, as is required for a
8008 function definition. */
8011 require_complete_types_for_parms (tree parms)
8013 for (; parms; parms = TREE_CHAIN (parms))
8015 if (VOID_TYPE_P (TREE_TYPE (parms)))
8016 /* grokparms will have already issued an error. */
8017 TREE_TYPE (parms) = error_mark_node;
8018 else if (complete_type_or_else (TREE_TYPE (parms), parms))
8020 layout_decl (parms, 0);
8021 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8026 /* Returns nonzero if T is a local variable. */
8029 local_variable_p (tree t)
8031 if ((TREE_CODE (t) == VAR_DECL
8032 /* A VAR_DECL with a context that is a _TYPE is a static data
8034 && !TYPE_P (CP_DECL_CONTEXT (t))
8035 /* Any other non-local variable must be at namespace scope. */
8036 && !DECL_NAMESPACE_SCOPE_P (t))
8037 || (TREE_CODE (t) == PARM_DECL))
8043 /* Returns nonzero if T is an automatic local variable or a label.
8044 (These are the declarations that need to be remapped when the code
8045 containing them is duplicated.) */
8048 nonstatic_local_decl_p (tree t)
8050 return ((local_variable_p (t) && !TREE_STATIC (t))
8051 || TREE_CODE (t) == LABEL_DECL
8052 || TREE_CODE (t) == RESULT_DECL);
8055 /* Like local_variable_p, but suitable for use as a tree-walking
8059 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8060 void *data ATTRIBUTE_UNUSED)
8062 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8064 else if (TYPE_P (*tp))
8071 /* Check that ARG, which is a default-argument expression for a
8072 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8073 something goes wrong. DECL may also be a _TYPE node, rather than a
8074 DECL, if there is no DECL available. */
8077 check_default_argument (tree decl, tree arg)
8082 if (TREE_CODE (arg) == DEFAULT_ARG)
8083 /* We get a DEFAULT_ARG when looking at an in-class declaration
8084 with a default argument. Ignore the argument for now; we'll
8085 deal with it after the class is complete. */
8088 if (processing_template_decl || uses_template_parms (arg))
8089 /* We don't do anything checking until instantiation-time. Note
8090 that there may be uninstantiated arguments even for an
8091 instantiated function, since default arguments are not
8092 instantiated until they are needed. */
8101 decl_type = TREE_TYPE (decl);
8103 if (arg == error_mark_node
8104 || decl == error_mark_node
8105 || TREE_TYPE (arg) == error_mark_node
8106 || decl_type == error_mark_node)
8107 /* Something already went wrong. There's no need to check
8109 return error_mark_node;
8111 /* [dcl.fct.default]
8113 A default argument expression is implicitly converted to the
8115 if (!TREE_TYPE (arg)
8116 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
8119 error ("default argument for `%#D' has type `%T'",
8120 decl, TREE_TYPE (arg));
8122 error ("default argument for parameter of type `%T' has type `%T'",
8123 decl_type, TREE_TYPE (arg));
8125 return error_mark_node;
8128 /* [dcl.fct.default]
8130 Local variables shall not be used in default argument
8133 The keyword `this' shall not be used in a default argument of a
8135 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8139 error ("default argument `%E' uses local variable `%D'",
8141 return error_mark_node;
8148 /* Decode the list of parameter types for a function type.
8149 Given the list of things declared inside the parens,
8150 return a list of types.
8152 If this parameter does not end with an ellipsis, we append
8155 *PARMS is set to the chain of PARM_DECLs created. */
8158 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8160 tree result = NULL_TREE;
8161 tree decls = NULL_TREE;
8162 int ellipsis = !first_parm || first_parm->ellipsis_p;
8163 cp_parameter_declarator *parm;
8166 for (parm = first_parm; parm != NULL; parm = parm->next)
8168 tree type = NULL_TREE;
8169 tree init = parm->default_argument;
8173 if (parm == no_parameters)
8176 attrs = parm->decl_specifiers.attributes;
8177 parm->decl_specifiers.attributes = NULL_TREE;
8178 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8179 PARM, init != NULL_TREE, &attrs);
8180 if (! decl || TREE_TYPE (decl) == error_mark_node)
8184 cplus_decl_attributes (&decl, attrs, 0);
8186 type = TREE_TYPE (decl);
8187 if (VOID_TYPE_P (type))
8189 if (same_type_p (type, void_type_node)
8190 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8191 /* this is a parmlist of `(void)', which is ok. */
8193 cxx_incomplete_type_error (decl, type);
8194 /* It's not a good idea to actually create parameters of
8195 type `void'; other parts of the compiler assume that a
8196 void type terminates the parameter list. */
8197 type = error_mark_node;
8198 TREE_TYPE (decl) = error_mark_node;
8201 if (type != error_mark_node)
8203 /* Top-level qualifiers on the parameters are
8204 ignored for function types. */
8205 type = cp_build_qualified_type (type, 0);
8206 if (TREE_CODE (type) == METHOD_TYPE)
8208 error ("parameter `%D' invalidly declared method type", decl);
8209 type = build_pointer_type (type);
8210 TREE_TYPE (decl) = type;
8212 else if (abstract_virtuals_error (decl, type))
8213 any_error = 1; /* Seems like a good idea. */
8214 else if (POINTER_TYPE_P (type))
8216 /* [dcl.fct]/6, parameter types cannot contain pointers
8217 (references) to arrays of unknown bound. */
8218 tree t = TREE_TYPE (type);
8219 int ptr = TYPE_PTR_P (type);
8225 else if (TREE_CODE (t) != ARRAY_TYPE)
8227 else if (!TYPE_DOMAIN (t))
8231 if (TREE_CODE (t) == ARRAY_TYPE)
8232 error ("parameter `%D' includes %s to array of unknown bound `%T'",
8233 decl, ptr ? "pointer" : "reference", t);
8236 if (!any_error && init)
8237 init = check_default_argument (decl, init);
8242 TREE_CHAIN (decl) = decls;
8244 result = tree_cons (init, type, result);
8246 decls = nreverse (decls);
8247 result = nreverse (result);
8249 result = chainon (result, void_list_node);
8256 /* D is a constructor or overloaded `operator='.
8258 Let T be the class in which D is declared. Then, this function
8261 -1 if D's is an ill-formed constructor or copy assignment operator
8262 whose first parameter is of type `T'.
8263 0 if D is not a copy constructor or copy assignment
8265 1 if D is a copy constructor or copy assignment operator whose
8266 first parameter is a reference to const qualified T.
8267 2 if D is a copy constructor or copy assignment operator whose
8268 first parameter is a reference to non-const qualified T.
8270 This function can be used as a predicate. Positive values indicate
8271 a copy constructor and nonzero values indicate a copy assignment
8281 my_friendly_assert (DECL_FUNCTION_MEMBER_P (d), 20011208);
8283 if (DECL_TEMPLATE_INFO (d) && is_member_template (DECL_TI_TEMPLATE (d)))
8284 /* Instantiations of template member functions are never copy
8285 functions. Note that member functions of templated classes are
8286 represented as template functions internally, and we must
8287 accept those as copy functions. */
8290 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8294 arg_type = TREE_VALUE (args);
8296 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8298 /* Pass by value copy assignment operator. */
8301 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8302 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8304 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8310 args = TREE_CHAIN (args);
8312 if (args && args != void_list_node && !TREE_PURPOSE (args))
8313 /* There are more non-optional args. */
8319 /* Remember any special properties of member function DECL. */
8321 void grok_special_member_properties (tree decl)
8323 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl))
8324 ; /* Not special. */
8325 else if (DECL_CONSTRUCTOR_P (decl))
8327 int ctor = copy_fn_p (decl);
8333 A non-template constructor for class X is a copy
8334 constructor if its first parameter is of type X&, const
8335 X&, volatile X& or const volatile X&, and either there
8336 are no other parameters or else all other parameters have
8337 default arguments. */
8338 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl)) = 1;
8340 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl)) = 1;
8342 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8343 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl)) = 1;
8345 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8349 A non-template assignment operator for class X is a copy
8350 assignment operator if its parameter is of type X, X&, const
8351 X&, volatile X& or const volatile X&. */
8353 int assop = copy_fn_p (decl);
8357 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8359 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8364 /* Check a constructor DECL has the correct form. Complains
8365 if the class has a constructor of the form X(X). */
8368 grok_ctor_properties (tree ctype, tree decl)
8370 int ctor_parm = copy_fn_p (decl);
8376 A declaration of a constructor for a class X is ill-formed if
8377 its first parameter is of type (optionally cv-qualified) X
8378 and either there are no other parameters or else all other
8379 parameters have default arguments.
8381 We *don't* complain about member template instantiations that
8382 have this form, though; they can occur as we try to decide
8383 what constructor to use during overload resolution. Since
8384 overload resolution will never prefer such a constructor to
8385 the non-template copy constructor (which is either explicitly
8386 or implicitly defined), there's no need to worry about their
8387 existence. Theoretically, they should never even be
8388 instantiated, but that's hard to forestall. */
8389 error ("invalid constructor; you probably meant `%T (const %T&)'",
8397 /* An operator with this code is unary, but can also be binary. */
8400 ambi_op_p (enum tree_code code)
8402 return (code == INDIRECT_REF
8403 || code == ADDR_EXPR
8404 || code == CONVERT_EXPR
8405 || code == NEGATE_EXPR
8406 || code == PREINCREMENT_EXPR
8407 || code == PREDECREMENT_EXPR);
8410 /* An operator with this name can only be unary. */
8413 unary_op_p (enum tree_code code)
8415 return (code == TRUTH_NOT_EXPR
8416 || code == BIT_NOT_EXPR
8417 || code == COMPONENT_REF
8418 || code == TYPE_EXPR);
8421 /* DECL is a declaration for an overloaded operator. Returns true if
8422 the declaration is valid; false otherwise. If COMPLAIN is true,
8423 errors are issued for invalid declarations. */
8426 grok_op_properties (tree decl, int friendp, bool complain)
8428 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
8430 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
8431 tree name = DECL_NAME (decl);
8432 enum tree_code operator_code;
8436 /* Assume that the declaration is valid. */
8439 /* Count the number of arguments. */
8440 for (argtype = argtypes, arity = 0;
8441 argtype && argtype != void_list_node;
8442 argtype = TREE_CHAIN (argtype))
8445 if (current_class_type == NULL_TREE)
8448 if (DECL_CONV_FN_P (decl))
8449 operator_code = TYPE_EXPR;
8453 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8454 if (ansi_opname (CODE) == name) \
8456 operator_code = (CODE); \
8459 else if (ansi_assopname (CODE) == name) \
8461 operator_code = (CODE); \
8462 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8466 #include "operators.def"
8472 my_friendly_assert (operator_code != LAST_CPLUS_TREE_CODE, 20000526);
8473 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8477 switch (operator_code)
8480 TYPE_HAS_NEW_OPERATOR (current_class_type) = 1;
8484 TYPE_GETS_DELETE (current_class_type) |= 1;
8488 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type) = 1;
8491 case VEC_DELETE_EXPR:
8492 TYPE_GETS_DELETE (current_class_type) |= 2;
8500 /* [basic.std.dynamic.allocation]/1:
8502 A program is ill-formed if an allocation function is declared
8503 in a namespace scope other than global scope or declared static
8506 The same also holds true for deallocation functions. */
8507 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
8508 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8510 if (DECL_NAMESPACE_SCOPE_P (decl))
8512 if (CP_DECL_CONTEXT (decl) != global_namespace)
8513 error ("`%D' may not be declared within a namespace", decl);
8514 else if (!TREE_PUBLIC (decl))
8515 error ("`%D' may not be declared as static", decl);
8519 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
8520 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
8521 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8522 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
8525 /* An operator function must either be a non-static member function
8526 or have at least one parameter of a class, a reference to a class,
8527 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8528 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
8530 if (operator_code == TYPE_EXPR
8531 || operator_code == CALL_EXPR
8532 || operator_code == COMPONENT_REF
8533 || operator_code == ARRAY_REF
8534 || operator_code == NOP_EXPR)
8535 error ("`%D' must be a nonstatic member function", decl);
8540 if (DECL_STATIC_FUNCTION_P (decl))
8541 error ("`%D' must be either a non-static member function or a non-member function", decl);
8543 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
8545 tree arg = non_reference (TREE_VALUE (p));
8546 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8547 because these checks are performed even on
8548 template functions. */
8549 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
8553 if (!p || p == void_list_node)
8558 error ("`%D' must have an argument of class or "
8566 /* There are no restrictions on the arguments to an overloaded
8568 if (operator_code == CALL_EXPR)
8571 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
8573 tree t = TREE_TYPE (name);
8576 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
8577 const char *what = 0;
8580 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
8582 if (TREE_CODE (t) == VOID_TYPE)
8584 else if (t == current_class_type)
8585 what = "the same type";
8586 /* Don't force t to be complete here. */
8587 else if (IS_AGGR_TYPE (t)
8588 && COMPLETE_TYPE_P (t)
8589 && DERIVED_FROM_P (t, current_class_type))
8590 what = "a base class";
8592 if (what && warn_conversion)
8593 warning ("conversion to %s%s will never use a type conversion operator",
8594 ref ? "a reference to " : "", what);
8597 if (operator_code == COND_EXPR)
8600 error ("ISO C++ prohibits overloading operator ?:");
8602 else if (ambi_op_p (operator_code))
8605 /* We pick the one-argument operator codes by default, so
8606 we don't have to change anything. */
8608 else if (arity == 2)
8610 /* If we thought this was a unary operator, we now know
8611 it to be a binary operator. */
8612 switch (operator_code)
8615 operator_code = MULT_EXPR;
8619 operator_code = BIT_AND_EXPR;
8623 operator_code = PLUS_EXPR;
8627 operator_code = MINUS_EXPR;
8630 case PREINCREMENT_EXPR:
8631 operator_code = POSTINCREMENT_EXPR;
8634 case PREDECREMENT_EXPR:
8635 operator_code = POSTDECREMENT_EXPR;
8642 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8644 if ((operator_code == POSTINCREMENT_EXPR
8645 || operator_code == POSTDECREMENT_EXPR)
8646 && ! processing_template_decl
8647 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
8650 error ("postfix `%D' must take `int' as its argument",
8654 ("postfix `%D' must take `int' as its second argument",
8661 error ("`%D' must take either zero or one argument", decl);
8663 error ("`%D' must take either one or two arguments", decl);
8666 /* More Effective C++ rule 6. */
8668 && (operator_code == POSTINCREMENT_EXPR
8669 || operator_code == POSTDECREMENT_EXPR
8670 || operator_code == PREINCREMENT_EXPR
8671 || operator_code == PREDECREMENT_EXPR))
8673 tree arg = TREE_VALUE (argtypes);
8674 tree ret = TREE_TYPE (TREE_TYPE (decl));
8675 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
8676 arg = TREE_TYPE (arg);
8677 arg = TYPE_MAIN_VARIANT (arg);
8678 if (operator_code == PREINCREMENT_EXPR
8679 || operator_code == PREDECREMENT_EXPR)
8681 if (TREE_CODE (ret) != REFERENCE_TYPE
8682 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
8684 warning ("prefix `%D' should return `%T'", decl,
8685 build_reference_type (arg));
8689 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
8690 warning ("postfix `%D' should return `%T'", decl, arg);
8694 else if (unary_op_p (operator_code))
8699 error ("`%D' must take `void'", decl);
8701 error ("`%D' must take exactly one argument", decl);
8704 else /* if (binary_op_p (operator_code)) */
8709 error ("`%D' must take exactly one argument", decl);
8711 error ("`%D' must take exactly two arguments", decl);
8714 /* More Effective C++ rule 7. */
8716 && (operator_code == TRUTH_ANDIF_EXPR
8717 || operator_code == TRUTH_ORIF_EXPR
8718 || operator_code == COMPOUND_EXPR))
8719 warning ("user-defined `%D' always evaluates both arguments",
8723 /* Effective C++ rule 23. */
8726 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
8727 && (operator_code == PLUS_EXPR
8728 || operator_code == MINUS_EXPR
8729 || operator_code == TRUNC_DIV_EXPR
8730 || operator_code == MULT_EXPR
8731 || operator_code == TRUNC_MOD_EXPR)
8732 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
8733 warning ("`%D' should return by value", decl);
8736 for (; argtypes && argtypes != void_list_node;
8737 argtypes = TREE_CHAIN (argtypes))
8738 if (TREE_PURPOSE (argtypes))
8740 TREE_PURPOSE (argtypes) = NULL_TREE;
8741 if (operator_code == POSTINCREMENT_EXPR
8742 || operator_code == POSTDECREMENT_EXPR)
8745 pedwarn ("`%D' cannot have default arguments", decl);
8748 error ("`%D' cannot have default arguments", decl);
8757 tag_name (enum tag_types code)
8774 /* Name lookup in an elaborated-type-specifier (after the keyword
8775 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
8776 elaborated-type-specifier is invalid, issue a diagnostic and return
8777 error_mark_node; otherwise, return the *_TYPE to which it referred.
8778 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
8781 check_elaborated_type_specifier (enum tag_types tag_code,
8783 bool allow_template_p)
8789 struct S { struct S *p; };
8791 name lookup will find the TYPE_DECL for the implicit "S::S"
8792 typedef. Adjust for that here. */
8793 if (DECL_SELF_REFERENCE_P (decl))
8794 decl = TYPE_NAME (TREE_TYPE (decl));
8796 type = TREE_TYPE (decl);
8800 If the identifier resolves to a typedef-name or a template
8801 type-parameter, the elaborated-type-specifier is ill-formed.
8803 In other words, the only legitimate declaration to use in the
8804 elaborated type specifier is the implicit typedef created when
8805 the type is declared. */
8806 if (!DECL_IMPLICIT_TYPEDEF_P (decl))
8808 error ("using typedef-name `%D' after `%s'", decl, tag_name (tag_code));
8809 return IS_AGGR_TYPE (type) ? type : error_mark_node;
8812 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8814 error ("using template type parameter `%T' after `%s'",
8815 type, tag_name (tag_code));
8816 return error_mark_node;
8818 else if (TREE_CODE (type) != RECORD_TYPE
8819 && TREE_CODE (type) != UNION_TYPE
8820 && tag_code != enum_type)
8822 error ("`%T' referred to as `%s'", type, tag_name (tag_code));
8823 return error_mark_node;
8825 else if (TREE_CODE (type) != ENUMERAL_TYPE
8826 && tag_code == enum_type)
8828 error ("`%T' referred to as enum", type);
8829 return error_mark_node;
8831 else if (!allow_template_p
8832 && TREE_CODE (type) == RECORD_TYPE
8833 && CLASSTYPE_IS_TEMPLATE (type))
8835 /* If a class template appears as elaborated type specifier
8836 without a template header such as:
8838 template <class T> class C {};
8839 void f(class C); // No template header here
8841 then the required template argument is missing. */
8843 error ("template argument required for `%s %T'",
8844 tag_name (tag_code),
8845 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
8846 return error_mark_node;
8852 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
8853 Define the tag as a forward-reference if it is not defined.
8855 If a declaration is given, process it here, and report an error if
8856 multiple declarations are not identical.
8858 GLOBALIZE is false when this is also a definition. Only look in
8859 the current frame for the name (since C++ allows new names in any
8862 TEMPLATE_HEADER_P is true when this declaration is preceded by
8863 a set of template parameters. */
8866 xref_tag (enum tag_types tag_code, tree name,
8867 bool globalize, bool template_header_p)
8869 enum tree_code code;
8871 struct cp_binding_level *b = current_binding_level;
8872 tree context = NULL_TREE;
8874 timevar_push (TV_NAME_LOOKUP);
8876 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 0);
8888 code = ENUMERAL_TYPE;
8896 /* If we know we are defining this tag, only look it up in
8897 this scope and don't try to find it as a type. */
8898 t = lookup_tag (code, name, b, 1);
8902 tree decl = lookup_name (name, 2);
8904 if (decl && DECL_CLASS_TEMPLATE_P (decl))
8905 decl = DECL_TEMPLATE_RESULT (decl);
8907 if (decl && TREE_CODE (decl) == TYPE_DECL)
8909 /* Two cases we need to consider when deciding if a class
8910 template is allowed as an elaborated type specifier:
8911 1. It is a self reference to its own class.
8912 2. It comes with a template header.
8916 template <class T> class C {
8917 class C *c1; // DECL_SELF_REFERENCE_P is true
8920 template <class U> class C; // template_header_p is true
8921 template <class T> class C<T>::D {
8922 class C *c2; // DECL_SELF_REFERENCE_P is true
8925 t = check_elaborated_type_specifier (tag_code,
8928 | DECL_SELF_REFERENCE_P (decl));
8929 if (t == error_mark_node)
8930 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
8935 if (t && current_class_type
8936 && template_class_depth (current_class_type)
8937 && template_header_p)
8939 /* Since GLOBALIZE is nonzero, we are not looking at a
8940 definition of this tag. Since, in addition, we are currently
8941 processing a (member) template declaration of a template
8942 class, we must be very careful; consider:
8949 { template <class V>
8950 friend struct S1; };
8952 Here, the S2::S1 declaration should not be confused with the
8953 outer declaration. In particular, the inner version should
8954 have a template parameter of level 2, not level 1. This
8955 would be particularly important if the member declaration
8958 template <class V = U> friend struct S1;
8960 say, when we should tsubst into `U' when instantiating
8961 S2. On the other hand, when presented with:
8971 we must find the inner binding eventually. We
8972 accomplish this by making sure that the new type we
8973 create to represent this declaration has the right
8975 context = TYPE_CONTEXT (t);
8982 /* If no such tag is yet defined, create a forward-reference node
8983 and record it as the "definition".
8984 When a real declaration of this type is found,
8985 the forward-reference will be altered into a real type. */
8986 if (code == ENUMERAL_TYPE)
8988 error ("use of enum `%#D' without previous declaration", name);
8989 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
8993 t = make_aggr_type (code);
8994 TYPE_CONTEXT (t) = context;
8995 pushtag (name, t, globalize);
9000 if (!globalize && processing_template_decl && IS_AGGR_TYPE (t))
9001 redeclare_class_template (t, current_template_parms);
9002 else if (!processing_template_decl
9004 && CLASSTYPE_IS_TEMPLATE (t))
9006 error ("redeclaration of `%T' as a non-template", t);
9007 t = error_mark_node;
9011 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9015 xref_tag_from_type (tree old, tree id, int globalize)
9017 enum tag_types tag_kind;
9019 if (TREE_CODE (old) == RECORD_TYPE)
9020 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9022 tag_kind = union_type;
9024 if (id == NULL_TREE)
9025 id = TYPE_IDENTIFIER (old);
9027 return xref_tag (tag_kind, id, globalize, false);
9030 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9031 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9032 access_* node, and the TREE_VALUE is the type of the base-class.
9033 Non-NULL TREE_TYPE indicates virtual inheritance. */
9036 xref_basetypes (tree ref, tree base_list)
9039 tree binfo, base_binfo;
9040 unsigned max_vbases = 0; /* Maxium direct & indirect virtual bases. */
9041 unsigned max_bases = 0; /* Maxium direct bases. */
9043 tree default_access;
9044 tree igo_prev; /* Track Inheritance Graph Order. */
9046 if (ref == error_mark_node)
9049 /* The base of a derived class is private by default, all others are
9051 default_access = (TREE_CODE (ref) == RECORD_TYPE
9052 && CLASSTYPE_DECLARED_CLASS (ref)
9053 ? access_private_node : access_public_node);
9055 /* First, make sure that any templates in base-classes are
9056 instantiated. This ensures that if we call ourselves recursively
9057 we do not get confused about which classes are marked and which
9062 tree basetype = TREE_VALUE (*basep);
9064 if (!(processing_template_decl && uses_template_parms (basetype))
9065 && !complete_type_or_else (basetype, NULL))
9066 /* An incomplete type. Remove it from the list. */
9067 *basep = TREE_CHAIN (*basep);
9071 if (TREE_TYPE (*basep))
9073 if (CLASS_TYPE_P (basetype))
9074 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9075 basep = &TREE_CHAIN (*basep);
9079 SET_CLASSTYPE_MARKED (ref);
9081 /* The binfo slot should be empty, unless this is an (ill-formed)
9083 my_friendly_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref), 20040706);
9084 my_friendly_assert (TYPE_MAIN_VARIANT (ref) == ref, 20040712);
9086 binfo = make_tree_binfo (max_bases);
9088 TYPE_BINFO (ref) = binfo;
9089 BINFO_OFFSET (binfo) = size_zero_node;
9090 BINFO_TYPE (binfo) = ref;
9094 BINFO_BASE_ACCESSES (binfo) = make_tree_vec (max_bases);
9095 /* An aggregate cannot have baseclasses. */
9096 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9098 if (TREE_CODE (ref) == UNION_TYPE)
9099 error ("derived union `%T' invalid", ref);
9104 TYPE_USES_MULTIPLE_INHERITANCE (ref) = 1;
9105 /* If there is more than one non-empty they cannot be at the
9107 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
9109 if (TYPE_FOR_JAVA (ref))
9110 error ("Java class '%T' cannot have multiple bases", ref);
9115 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, max_vbases);
9116 TYPE_USES_VIRTUAL_BASECLASSES (ref) = 1;
9117 /* Converting to a virtual base class requires looking up the
9118 offset of the virtual base. */
9119 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
9121 if (TYPE_FOR_JAVA (ref))
9122 error ("Java class '%T' cannot have virtual bases", ref);
9125 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9127 tree access = TREE_PURPOSE (base_list);
9128 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9129 tree basetype = TREE_VALUE (base_list);
9131 if (access == access_default_node)
9132 access = default_access;
9134 if (TREE_CODE (basetype) == TYPE_DECL)
9135 basetype = TREE_TYPE (basetype);
9136 if (TREE_CODE (basetype) != RECORD_TYPE
9137 && TREE_CODE (basetype) != TYPENAME_TYPE
9138 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9139 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9141 error ("base type `%T' fails to be a struct or class type",
9146 if (CLASSTYPE_MARKED (basetype))
9148 if (basetype == ref)
9149 error ("recursive type `%T' undefined", basetype);
9151 error ("duplicate base type `%T' invalid", basetype);
9154 SET_CLASSTYPE_MARKED (basetype);
9156 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9157 TYPE_FOR_JAVA (ref) = 1;
9159 base_binfo = NULL_TREE;
9160 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9162 base_binfo = TYPE_BINFO (basetype);
9163 /* The orignal basetype could have been a typedef'd type. */
9164 basetype = BINFO_TYPE (base_binfo);
9166 /* Inherit flags from the base. */
9167 TYPE_HAS_NEW_OPERATOR (ref)
9168 |= TYPE_HAS_NEW_OPERATOR (basetype);
9169 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9170 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9171 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9172 TYPE_USES_MULTIPLE_INHERITANCE (ref)
9173 |= TYPE_USES_MULTIPLE_INHERITANCE (basetype);
9174 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref)
9175 |= TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (basetype);
9176 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9179 base_binfo = copy_binfo (base_binfo, basetype, ref,
9180 &igo_prev, via_virtual);
9181 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9182 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9184 TREE_VEC_ELT (BINFO_BASE_ACCESSES (binfo),
9185 BINFO_N_BASE_BINFOS (binfo)) = access;
9186 BINFO_BASE_APPEND (binfo, base_binfo);
9190 /* If any bases were invalid, we will have allocated too many
9192 TREE_VEC_LENGTH (BINFO_BASE_ACCESSES (binfo))
9193 = BINFO_N_BASE_BINFOS (binfo);
9195 /* Unmark all the types. */
9196 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9197 CLEAR_CLASSTYPE_MARKED (BINFO_TYPE (base_binfo));
9198 CLEAR_CLASSTYPE_MARKED (ref);
9202 /* Begin compiling the definition of an enumeration type.
9203 NAME is its name (or null if anonymous).
9204 Returns the type object, as yet incomplete.
9205 Also records info about it so that build_enumerator
9206 may be used to declare the individual values as they are read. */
9209 start_enum (tree name)
9211 tree enumtype = NULL_TREE;
9212 struct cp_binding_level *b = current_binding_level;
9214 /* If this is the real definition for a previous forward reference,
9215 fill in the contents in the same object that used to be the
9216 forward reference. */
9218 if (name != NULL_TREE)
9219 enumtype = lookup_tag (ENUMERAL_TYPE, name, b, 1);
9221 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9223 error ("multiple definition of `%#T'", enumtype);
9224 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9225 /* Clear out TYPE_VALUES, and start again. */
9226 TYPE_VALUES (enumtype) = NULL_TREE;
9230 enumtype = make_node (ENUMERAL_TYPE);
9231 pushtag (name, enumtype, 0);
9237 /* After processing and defining all the values of an enumeration type,
9238 install their decls in the enumeration type and finish it off.
9239 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9242 finish_enum (tree enumtype)
9254 integer_type_kind itk;
9255 tree underlying_type = NULL_TREE;
9257 /* We built up the VALUES in reverse order. */
9258 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9260 /* For an enum defined in a template, just set the type of the values;
9261 all further processing is postponed until the template is
9262 instantiated. We need to set the type so that tsubst of a CONST_DECL
9264 if (processing_template_decl)
9266 for (values = TYPE_VALUES (enumtype);
9268 values = TREE_CHAIN (values))
9269 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9270 if (at_function_scope_p ())
9271 add_stmt (build_min (TAG_DEFN, enumtype));
9275 /* Determine the minimum and maximum values of the enumerators. */
9276 if (TYPE_VALUES (enumtype))
9278 minnode = maxnode = NULL_TREE;
9280 for (values = TYPE_VALUES (enumtype);
9282 values = TREE_CHAIN (values))
9284 decl = TREE_VALUE (values);
9286 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9287 each enumerator has the type of its enumeration. Prior to the
9288 closing brace, the type of each enumerator is the type of its
9289 initializing value. */
9290 TREE_TYPE (decl) = enumtype;
9292 /* Update the minimum and maximum values, if appropriate. */
9293 value = DECL_INITIAL (decl);
9294 /* Figure out what the minimum and maximum values of the
9297 minnode = maxnode = value;
9298 else if (tree_int_cst_lt (maxnode, value))
9300 else if (tree_int_cst_lt (value, minnode))
9303 /* Set the TREE_TYPE for the values as well. That's so that when
9304 we call decl_constant_value we get an entity of the right type
9305 (but with the constant value). But first make a copy so we
9306 don't clobber shared INTEGER_CSTs. */
9307 if (TREE_TYPE (value) != enumtype)
9309 value = DECL_INITIAL (decl) = copy_node (value);
9310 TREE_TYPE (value) = enumtype;
9317 If the enumerator-list is empty, the underlying type is as if
9318 the enumeration had a single enumerator with value 0. */
9319 minnode = maxnode = integer_zero_node;
9321 /* Compute the number of bits require to represent all values of the
9322 enumeration. We must do this before the type of MINNODE and
9323 MAXNODE are transformed, since min_precision relies on the
9324 TREE_TYPE of the value it is passed. */
9325 unsignedp = tree_int_cst_sgn (minnode) >= 0;
9326 lowprec = min_precision (minnode, unsignedp);
9327 highprec = min_precision (maxnode, unsignedp);
9328 precision = MAX (lowprec, highprec);
9330 /* Determine the underlying type of the enumeration.
9334 The underlying type of an enumeration is an integral type that
9335 can represent all the enumerator values defined in the
9336 enumeration. It is implementation-defined which integral type is
9337 used as the underlying type for an enumeration except that the
9338 underlying type shall not be larger than int unless the value of
9339 an enumerator cannot fit in an int or unsigned int.
9341 We use "int" or an "unsigned int" as the underlying type, even if
9342 a smaller integral type would work, unless the user has
9343 explicitly requested that we use the smallest possible type. */
9344 for (itk = (flag_short_enums ? itk_char : itk_int);
9348 underlying_type = integer_types[itk];
9349 if (TYPE_PRECISION (underlying_type) >= precision
9350 && TYPE_UNSIGNED (underlying_type) == unsignedp)
9353 if (itk == itk_none)
9357 IF no integral type can represent all the enumerator values, the
9358 enumeration is ill-formed. */
9359 error ("no integral type can represent all of the enumerator values "
9360 "for `%T'", enumtype);
9361 precision = TYPE_PRECISION (long_long_integer_type_node);
9362 underlying_type = integer_types[itk_unsigned_long_long];
9365 /* Compute the minium and maximum values for the type.
9369 For an enumeration where emin is the smallest enumerator and emax
9370 is the largest, the values of the enumeration are the values of the
9371 underlying type in the range bmin to bmax, where bmin and bmax are,
9372 respectively, the smallest and largest values of the smallest bit-
9373 field that can store emin and emax. */
9374 TYPE_PRECISION (enumtype) = precision;
9375 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
9379 The value of sizeof() applied to an enumeration type, an object
9380 of an enumeration type, or an enumerator, is the value of sizeof()
9381 applied to the underlying type. */
9382 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
9383 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
9384 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
9385 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
9386 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
9387 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
9389 /* Convert each of the enumerators to the type of the underlying
9390 type of the enumeration. */
9391 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
9393 decl = TREE_VALUE (values);
9394 value = perform_implicit_conversion (underlying_type,
9395 DECL_INITIAL (decl));
9396 TREE_TYPE (value) = enumtype;
9397 DECL_INITIAL (decl) = value;
9398 TREE_VALUE (values) = value;
9401 /* Fix up all variant types of this enum type. */
9402 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
9404 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
9405 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
9406 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
9407 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
9408 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
9409 TYPE_MODE (t) = TYPE_MODE (enumtype);
9410 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
9411 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
9412 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
9413 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
9416 /* Finish debugging output for this type. */
9417 rest_of_type_compilation (enumtype, namespace_bindings_p ());
9420 /* Build and install a CONST_DECL for an enumeration constant of the
9421 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9422 Assignment of sequential values by default is handled here. */
9425 build_enumerator (tree name, tree value, tree enumtype)
9431 /* Remove no-op casts from the value. */
9433 STRIP_TYPE_NOPS (value);
9435 if (! processing_template_decl)
9437 /* Validate and default VALUE. */
9438 if (value != NULL_TREE)
9440 value = decl_constant_value (value);
9442 if (TREE_CODE (value) == INTEGER_CST)
9444 value = perform_integral_promotions (value);
9445 constant_expression_warning (value);
9449 error ("enumerator value for `%D' not integer constant", name);
9454 /* Default based on previous value. */
9455 if (value == NULL_TREE)
9459 if (TYPE_VALUES (enumtype))
9461 /* The next value is the previous value ... */
9462 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
9464 value = cp_build_binary_op (PLUS_EXPR,
9468 if (tree_int_cst_lt (value, prev_value))
9469 error ("overflow in enumeration values at `%D'", name);
9472 value = integer_zero_node;
9475 /* Remove no-op casts from the value. */
9476 STRIP_TYPE_NOPS (value);
9479 /* C++ associates enums with global, function, or class declarations. */
9480 context = current_scope ();
9482 context = current_namespace;
9484 /* Build the actual enumeration constant. Note that the enumeration
9485 constants have the type of their initializers until the
9486 enumeration is complete:
9490 Following the closing brace of an enum-specifier, each enumer-
9491 ator has the type of its enumeration. Prior to the closing
9492 brace, the type of each enumerator is the type of its
9495 In finish_enum we will reset the type. Of course, if we're
9496 processing a template, there may be no value. */
9497 type = value ? TREE_TYPE (value) : NULL_TREE;
9499 if (context && context == current_class_type)
9500 /* This enum declaration is local to the class. We need the full
9501 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9502 decl = build_lang_decl (CONST_DECL, name, type);
9504 /* It's a global enum, or it's local to a function. (Note local to
9505 a function could mean local to a class method. */
9506 decl = build_decl (CONST_DECL, name, type);
9508 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
9509 TREE_CONSTANT (decl) = 1;
9510 TREE_INVARIANT (decl) = 1;
9511 TREE_READONLY (decl) = 1;
9512 DECL_INITIAL (decl) = value;
9514 if (context && context == current_class_type)
9515 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9516 on the TYPE_FIELDS list for `S'. (That's so that you can say
9517 things like `S::i' later.) */
9518 finish_member_declaration (decl);
9522 /* Add this enumeration constant to the list for this type. */
9523 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
9527 /* We're defining DECL. Make sure that it's type is OK. */
9530 check_function_type (tree decl, tree current_function_parms)
9532 tree fntype = TREE_TYPE (decl);
9533 tree return_type = complete_type (TREE_TYPE (fntype));
9535 /* In a function definition, arg types must be complete. */
9536 require_complete_types_for_parms (current_function_parms);
9538 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
9540 error ("return type `%#T' is incomplete", TREE_TYPE (fntype));
9542 /* Make it return void instead, but don't change the
9543 type of the DECL_RESULT, in case we have a named return value. */
9544 if (TREE_CODE (fntype) == METHOD_TYPE)
9546 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
9548 = build_method_type_directly (ctype,
9550 FUNCTION_ARG_CHAIN (decl));
9554 = build_function_type (void_type_node,
9555 TYPE_ARG_TYPES (TREE_TYPE (decl)));
9557 = build_exception_variant (fntype,
9558 TYPE_RAISES_EXCEPTIONS (fntype));
9561 abstract_virtuals_error (decl, TREE_TYPE (fntype));
9564 /* Create the FUNCTION_DECL for a function definition.
9565 DECLSPECS and DECLARATOR are the parts of the declaration;
9566 they describe the function's name and the type it returns,
9567 but twisted together in a fashion that parallels the syntax of C.
9569 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9570 DECLARATOR is really the DECL for the function we are about to
9571 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9572 indicating that the function is an inline defined in-class.
9574 This function creates a binding context for the function body
9575 as well as setting up the FUNCTION_DECL in current_function_decl.
9577 For C++, we must first check whether that datum makes any sense.
9578 For example, "class A local_a(1,2);" means that variable local_a
9579 is an aggregate of type A, which should have a constructor
9580 applied to it with the argument list [1, 2]. */
9583 start_preparsed_function (tree decl1, tree attrs, int flags)
9585 tree ctype = NULL_TREE;
9588 int doing_friend = 0;
9589 struct cp_binding_level *bl;
9590 tree current_function_parms;
9593 my_friendly_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE, 160);
9594 my_friendly_assert (TREE_CHAIN (void_list_node) == NULL_TREE, 161);
9596 fntype = TREE_TYPE (decl1);
9597 if (TREE_CODE (fntype) == METHOD_TYPE)
9598 ctype = TYPE_METHOD_BASETYPE (fntype);
9600 /* ISO C++ 11.4/5. A friend function defined in a class is in
9601 the (lexical) scope of the class in which it is defined. */
9602 if (!ctype && DECL_FRIEND_P (decl1))
9604 ctype = DECL_FRIEND_CONTEXT (decl1);
9606 /* CTYPE could be null here if we're dealing with a template;
9607 for example, `inline friend float foo()' inside a template
9608 will have no CTYPE set. */
9609 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
9615 if (DECL_DECLARED_INLINE_P (decl1)
9616 && lookup_attribute ("noinline", attrs))
9617 warning ("%Jinline function '%D' given attribute noinline", decl1, decl1);
9619 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
9620 /* This is a constructor, we must ensure that any default args
9621 introduced by this definition are propagated to the clones
9622 now. The clones are used directly in overload resolution. */
9623 adjust_clone_args (decl1);
9625 /* Sometimes we don't notice that a function is a static member, and
9626 build a METHOD_TYPE for it. Fix that up now. */
9627 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
9628 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
9630 revert_static_member_fn (decl1);
9634 /* Set up current_class_type, and enter the scope of the class, if
9637 push_nested_class (ctype);
9638 else if (DECL_STATIC_FUNCTION_P (decl1))
9639 push_nested_class (DECL_CONTEXT (decl1));
9641 /* Now that we have entered the scope of the class, we must restore
9642 the bindings for any template parameters surrounding DECL1, if it
9643 is an inline member template. (Order is important; consider the
9644 case where a template parameter has the same name as a field of
9645 the class.) It is not until after this point that
9646 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
9647 if (flags & SF_INCLASS_INLINE)
9648 maybe_begin_member_template_processing (decl1);
9650 /* Effective C++ rule 15. */
9652 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
9653 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
9654 warning ("`operator=' should return a reference to `*this'");
9656 /* Make the init_value nonzero so pushdecl knows this is not tentative.
9657 error_mark_node is replaced below (in poplevel) with the BLOCK. */
9658 if (!DECL_INITIAL (decl1))
9659 DECL_INITIAL (decl1) = error_mark_node;
9661 /* This function exists in static storage.
9662 (This does not mean `static' in the C sense!) */
9663 TREE_STATIC (decl1) = 1;
9665 /* We must call push_template_decl after current_class_type is set
9666 up. (If we are processing inline definitions after exiting a
9667 class scope, current_class_type will be NULL_TREE until set above
9668 by push_nested_class.) */
9669 if (processing_template_decl)
9670 decl1 = push_template_decl (decl1);
9672 /* We are now in the scope of the function being defined. */
9673 current_function_decl = decl1;
9675 /* Save the parm names or decls from this function's declarator
9676 where store_parm_decls will find them. */
9677 current_function_parms = DECL_ARGUMENTS (decl1);
9679 /* Make sure the parameter and return types are reasonable. When
9680 you declare a function, these types can be incomplete, but they
9681 must be complete when you define the function. */
9682 if (! processing_template_decl)
9683 check_function_type (decl1, current_function_parms);
9685 /* Build the return declaration for the function. */
9686 restype = TREE_TYPE (fntype);
9687 /* Promote the value to int before returning it. */
9688 if (c_promoting_integer_type_p (restype))
9689 restype = type_promotes_to (restype);
9690 if (DECL_RESULT (decl1) == NULL_TREE)
9694 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
9695 DECL_ARTIFICIAL (resdecl) = 1;
9696 DECL_IGNORED_P (resdecl) = 1;
9697 DECL_RESULT (decl1) = resdecl;
9699 c_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
9702 /* Initialize RTL machinery. We cannot do this until
9703 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
9704 even when processing a template; this is how we get
9705 CFUN set up, and our per-function variables initialized.
9706 FIXME factor out the non-RTL stuff. */
9707 bl = current_binding_level;
9708 allocate_struct_function (decl1);
9709 current_binding_level = bl;
9711 /* Even though we're inside a function body, we still don't want to
9712 call expand_expr to calculate the size of a variable-sized array.
9713 We haven't necessarily assigned RTL to all variables yet, so it's
9714 not safe to try to expand expressions involving them. */
9715 cfun->x_dont_save_pending_sizes_p = 1;
9717 /* Start the statement-tree, start the tree now. */
9718 DECL_SAVED_TREE (decl1) = push_stmt_list ();
9720 /* Let the user know we're compiling this function. */
9721 announce_function (decl1);
9723 /* Record the decl so that the function name is defined.
9724 If we already have a decl for this name, and it is a FUNCTION_DECL,
9725 use the old decl. */
9726 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
9728 /* A specialization is not used to guide overload resolution. */
9729 if (!DECL_FUNCTION_MEMBER_P (decl1)
9730 && !(DECL_USE_TEMPLATE (decl1) &&
9731 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
9733 tree olddecl = pushdecl (decl1);
9735 if (olddecl == error_mark_node)
9736 /* If something went wrong when registering the declaration,
9737 use DECL1; we have to have a FUNCTION_DECL to use when
9738 parsing the body of the function. */
9741 /* Otherwise, OLDDECL is either a previous declaration of
9742 the same function or DECL1 itself. */
9747 /* We need to set the DECL_CONTEXT. */
9748 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
9749 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
9750 /* And make sure we have enough default args. */
9751 check_default_args (decl1);
9753 fntype = TREE_TYPE (decl1);
9756 /* Reset these in case the call to pushdecl changed them. */
9757 current_function_decl = decl1;
9760 /* If we are (erroneously) defining a function that we have already
9761 defined before, wipe out what we knew before. */
9762 if (!DECL_PENDING_INLINE_P (decl1))
9763 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
9765 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
9767 /* We know that this was set up by `grokclassfn'. We do not
9768 wait until `store_parm_decls', since evil parse errors may
9769 never get us to that point. Here we keep the consistency
9770 between `current_class_type' and `current_class_ptr'. */
9771 tree t = DECL_ARGUMENTS (decl1);
9773 my_friendly_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL,
9775 my_friendly_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE,
9778 cp_function_chain->x_current_class_ref
9779 = build_indirect_ref (t, NULL);
9780 cp_function_chain->x_current_class_ptr = t;
9782 /* Constructors and destructors need to know whether they're "in
9783 charge" of initializing virtual base classes. */
9785 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
9787 current_in_charge_parm = t;
9790 if (DECL_HAS_VTT_PARM_P (decl1))
9792 if (DECL_NAME (t) != vtt_parm_identifier)
9794 current_vtt_parm = t;
9798 if (DECL_INTERFACE_KNOWN (decl1))
9800 tree ctx = decl_function_context (decl1);
9802 if (DECL_NOT_REALLY_EXTERN (decl1))
9803 DECL_EXTERNAL (decl1) = 0;
9805 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
9806 && TREE_PUBLIC (ctx))
9807 /* This is a function in a local class in an extern inline
9809 comdat_linkage (decl1);
9811 /* If this function belongs to an interface, it is public.
9812 If it belongs to someone else's interface, it is also external.
9813 This only affects inlines and template instantiations. */
9814 else if (interface_unknown == 0
9815 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
9817 if (DECL_DECLARED_INLINE_P (decl1)
9818 || DECL_TEMPLATE_INSTANTIATION (decl1)
9819 || processing_template_decl)
9821 DECL_EXTERNAL (decl1)
9823 || (DECL_DECLARED_INLINE_P (decl1)
9824 && ! flag_implement_inlines
9825 && !DECL_VINDEX (decl1)));
9827 /* For WIN32 we also want to put these in linkonce sections. */
9828 maybe_make_one_only (decl1);
9831 DECL_EXTERNAL (decl1) = 0;
9832 DECL_NOT_REALLY_EXTERN (decl1) = 0;
9833 DECL_INTERFACE_KNOWN (decl1) = 1;
9835 else if (interface_unknown && interface_only
9836 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
9838 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
9839 interface, we will have interface_only set but not
9840 interface_known. In that case, we don't want to use the normal
9841 heuristics because someone will supply a #pragma implementation
9842 elsewhere, and deducing it here would produce a conflict. */
9843 comdat_linkage (decl1);
9844 DECL_EXTERNAL (decl1) = 0;
9845 DECL_INTERFACE_KNOWN (decl1) = 1;
9846 DECL_DEFER_OUTPUT (decl1) = 1;
9850 /* This is a definition, not a reference.
9851 So clear DECL_EXTERNAL. */
9852 DECL_EXTERNAL (decl1) = 0;
9854 if ((DECL_DECLARED_INLINE_P (decl1)
9855 || DECL_TEMPLATE_INSTANTIATION (decl1))
9856 && ! DECL_INTERFACE_KNOWN (decl1)
9857 /* Don't try to defer nested functions for now. */
9858 && ! decl_function_context (decl1))
9859 DECL_DEFER_OUTPUT (decl1) = 1;
9861 DECL_INTERFACE_KNOWN (decl1) = 1;
9864 begin_scope (sk_function_parms, decl1);
9868 if (DECL_DESTRUCTOR_P (decl1))
9870 dtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
9871 DECL_CONTEXT (dtor_label) = current_function_decl;
9874 start_fname_decls ();
9876 store_parm_decls (current_function_parms);
9880 /* Like start_preparsed_function, except that instead of a
9881 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
9883 Returns 1 on success. If the DECLARATOR is not suitable for a function
9884 (it defines a datum instead), we return 0, which tells
9885 yyparse to report a parse error. */
9888 start_function (cp_decl_specifier_seq *declspecs,
9889 const cp_declarator *declarator,
9894 if (have_extern_spec)
9896 declspecs->storage_class = sc_extern;
9897 /* This should only be done once on the outermost decl. */
9898 have_extern_spec = false;
9901 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
9902 /* If the declarator is not suitable for a function definition,
9903 cause a syntax error. */
9904 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
9907 cplus_decl_attributes (&decl1, attrs, 0);
9909 /* If #pragma weak was used, mark the decl weak now. */
9910 if (global_scope_p (current_binding_level))
9911 maybe_apply_pragma_weak (decl1);
9913 if (DECL_MAIN_P (decl1))
9915 /* If this doesn't return integer_type, or a typedef to
9916 integer_type, complain. */
9917 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl1)), integer_type_node))
9919 if (pedantic || warn_return_type)
9920 pedwarn ("return type for `main' changed to `int'");
9921 TREE_TYPE (decl1) = default_function_type;
9925 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
9930 /* Store the parameter declarations into the current function declaration.
9931 This is called after parsing the parameter declarations, before
9932 digesting the body of the function.
9934 Also install to binding contour return value identifier, if any. */
9937 store_parm_decls (tree current_function_parms)
9939 tree fndecl = current_function_decl;
9942 /* This is a chain of any other decls that came in among the parm
9943 declarations. If a parm is declared with enum {foo, bar} x;
9944 then CONST_DECLs for foo and bar are put here. */
9945 tree nonparms = NULL_TREE;
9947 if (current_function_parms)
9949 /* This case is when the function was defined with an ANSI prototype.
9950 The parms already have decls, so we need not do anything here
9951 except record them as in effect
9952 and complain if any redundant old-style parm decls were written. */
9954 tree specparms = current_function_parms;
9957 /* Must clear this because it might contain TYPE_DECLs declared
9959 current_binding_level->names = NULL;
9961 /* If we're doing semantic analysis, then we'll call pushdecl
9962 for each of these. We must do them in reverse order so that
9963 they end in the correct forward order. */
9964 specparms = nreverse (specparms);
9966 for (parm = specparms; parm; parm = next)
9968 next = TREE_CHAIN (parm);
9969 if (TREE_CODE (parm) == PARM_DECL)
9971 if (DECL_NAME (parm) == NULL_TREE
9972 || TREE_CODE (parm) != VOID_TYPE)
9975 error ("parameter `%D' declared void", parm);
9979 /* If we find an enum constant or a type tag,
9980 put it aside for the moment. */
9981 TREE_CHAIN (parm) = NULL_TREE;
9982 nonparms = chainon (nonparms, parm);
9986 /* Get the decls in their original chain order and record in the
9987 function. This is all and only the PARM_DECLs that were
9988 pushed into scope by the loop above. */
9989 DECL_ARGUMENTS (fndecl) = getdecls ();
9992 DECL_ARGUMENTS (fndecl) = NULL_TREE;
9994 /* Now store the final chain of decls for the arguments
9995 as the decl-chain of the current lexical scope.
9996 Put the enumerators in as well, at the front so that
9997 DECL_ARGUMENTS is not modified. */
9998 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10000 /* For a cloned function, we've already got all the code we need;
10001 there's no need to add any extra bits. */
10002 if (!DECL_CLONED_FUNCTION_P (fndecl))
10004 /* Do the starting of the exception specifications, if we have any. */
10005 if (flag_exceptions && !processing_template_decl
10006 && flag_enforce_eh_specs
10007 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10008 current_eh_spec_block = begin_eh_spec_block ();
10013 /* We have finished doing semantic analysis on DECL, but have not yet
10014 generated RTL for its body. Save away our current state, so that
10015 when we want to generate RTL later we know what to do. */
10018 save_function_data (tree decl)
10020 struct language_function *f;
10022 /* Save the language-specific per-function data so that we can
10023 get it back when we really expand this function. */
10024 my_friendly_assert (!DECL_PENDING_INLINE_P (decl),
10028 f = ggc_alloc (sizeof (struct language_function));
10029 memcpy (f, cp_function_chain, sizeof (struct language_function));
10030 DECL_SAVED_FUNCTION_DATA (decl) = f;
10032 /* Clear out the bits we don't need. */
10033 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10034 f->x_named_label_uses = NULL;
10035 f->bindings = NULL;
10036 f->x_local_names = NULL;
10039 /* Add a note to mark the beginning of the main body of the constructor.
10040 This is used to set up the data structures for the cleanup regions for
10041 fully-constructed bases and members. */
10044 begin_constructor_body (void)
10048 /* Add a note to mark the end of the main body of the constructor. This is
10049 used to end the cleanup regions for fully-constructed bases and
10053 finish_constructor_body (void)
10057 /* Do all the processing for the beginning of a destructor; set up the
10058 vtable pointers and cleanups for bases and members. */
10061 begin_destructor_body (void)
10064 tree compound_stmt;
10066 /* If the dtor is empty, and we know there is not any possible
10067 way we could use any vtable entries, before they are possibly
10068 set by a base class dtor, we don't have to setup the vtables,
10069 as we know that any base class dtor will set up any vtables
10070 it needs. We avoid MI, because one base class dtor can do a
10071 virtual dispatch to an overridden function that would need to
10072 have a non-related vtable set up, we cannot avoid setting up
10073 vtables in that case. We could change this to see if there
10074 is just one vtable.
10076 ??? In the destructor for a class, the vtables are set
10077 appropriately for that class. There will be no non-related
10078 vtables. jason 2001-12-11. */
10079 if_stmt = begin_if_stmt ();
10081 /* If it is not safe to avoid setting up the vtables, then
10082 someone will change the condition to be boolean_true_node.
10083 (Actually, for now, we do not have code to set the condition
10084 appropriately, so we just assume that we always need to
10085 initialize the vtables.) */
10086 finish_if_stmt_cond (boolean_true_node, if_stmt);
10088 compound_stmt = begin_compound_stmt (0);
10090 /* Make all virtual function table pointers in non-virtual base
10091 classes point to CURRENT_CLASS_TYPE's virtual function
10093 initialize_vtbl_ptrs (current_class_ptr);
10095 finish_compound_stmt (compound_stmt);
10096 finish_then_clause (if_stmt);
10097 finish_if_stmt (if_stmt);
10099 /* And insert cleanups for our bases and members so that they
10100 will be properly destroyed if we throw. */
10101 push_base_cleanups ();
10104 /* At the end of every destructor we generate code to delete the object if
10105 necessary. Do that now. */
10108 finish_destructor_body (void)
10112 /* Any return from a destructor will end up here; that way all base
10113 and member cleanups will be run when the function returns. */
10114 add_stmt (build_stmt (LABEL_EXPR, dtor_label));
10116 /* In a virtual destructor, we must call delete. */
10117 if (DECL_VIRTUAL_P (current_function_decl))
10120 tree virtual_size = cxx_sizeof (current_class_type);
10124 At the point of definition of a virtual destructor (including
10125 an implicit definition), non-placement operator delete shall
10126 be looked up in the scope of the destructor's class and if
10127 found shall be accessible and unambiguous. */
10128 exprstmt = build_op_delete_call
10129 (DELETE_EXPR, current_class_ptr, virtual_size,
10130 /*global_p=*/false, NULL_TREE);
10132 if_stmt = begin_if_stmt ();
10133 finish_if_stmt_cond (build (BIT_AND_EXPR, integer_type_node,
10134 current_in_charge_parm,
10137 finish_expr_stmt (exprstmt);
10138 finish_then_clause (if_stmt);
10139 finish_if_stmt (if_stmt);
10143 /* Do the necessary processing for the beginning of a function body, which
10144 in this case includes member-initializers, but not the catch clauses of
10145 a function-try-block. Currently, this means opening a binding level
10146 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10147 In other functions, this isn't necessary, but it doesn't hurt. */
10150 begin_function_body (void)
10154 if (processing_template_decl)
10155 /* Do nothing now. */;
10157 /* Always keep the BLOCK node associated with the outermost pair of
10158 curly braces of a function. These are needed for correct
10159 operation of dwarfout.c. */
10160 keep_next_level (true);
10162 stmt = begin_compound_stmt (BCS_FN_BODY);
10164 if (processing_template_decl)
10165 /* Do nothing now. */;
10166 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10167 begin_constructor_body ();
10168 else if (DECL_DESTRUCTOR_P (current_function_decl))
10169 begin_destructor_body ();
10174 /* Do the processing for the end of a function body. Currently, this means
10175 closing out the cleanups for fully-constructed bases and members, and in
10176 the case of the destructor, deleting the object if desired. Again, this
10177 is only meaningful for [cd]tors, since they are the only functions where
10178 there is a significant distinction between the main body and any
10179 function catch clauses. Handling, say, main() return semantics here
10180 would be wrong, as flowing off the end of a function catch clause for
10181 main() would also need to return 0. */
10184 finish_function_body (tree compstmt)
10186 /* Close the block. */
10187 finish_compound_stmt (compstmt);
10189 if (processing_template_decl)
10190 /* Do nothing now. */;
10191 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10192 finish_constructor_body ();
10193 else if (DECL_DESTRUCTOR_P (current_function_decl))
10194 finish_destructor_body ();
10197 /* Finish up a function declaration and compile that function
10198 all the way to assembler language output. The free the storage
10199 for the function definition.
10201 FLAGS is a bitwise or of the following values:
10203 We just finished processing the body of an in-class inline
10204 function definition. (This processing will have taken place
10205 after the class definition is complete.) */
10208 finish_function (int flags)
10210 tree fndecl = current_function_decl;
10211 tree fntype, ctype = NULL_TREE;
10212 int inclass_inline = (flags & 2) != 0;
10215 /* When we get some parse errors, we can end up without a
10216 current_function_decl, so cope. */
10217 if (fndecl == NULL_TREE)
10218 return error_mark_node;
10220 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10221 && DECL_VIRTUAL_P (fndecl)
10222 && !processing_template_decl)
10224 tree fnclass = DECL_CONTEXT (fndecl);
10225 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10226 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10229 nested = function_depth > 1;
10230 fntype = TREE_TYPE (fndecl);
10232 /* TREE_READONLY (fndecl) = 1;
10233 This caused &foo to be of type ptr-to-const-function
10234 which then got a warning when stored in a ptr-to-function variable. */
10236 my_friendly_assert (building_stmt_tree (), 20000911);
10238 /* For a cloned function, we've already got all the code we need;
10239 there's no need to add any extra bits. */
10240 if (!DECL_CLONED_FUNCTION_P (fndecl))
10242 if (DECL_MAIN_P (current_function_decl))
10244 /* Make it so that `main' always returns 0 by default. */
10246 finish_return_stmt (integer_one_node);
10248 finish_return_stmt (integer_zero_node);
10252 /* Finish dealing with exception specifiers. */
10253 if (flag_exceptions && !processing_template_decl
10254 && flag_enforce_eh_specs
10255 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10256 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10257 (TREE_TYPE (current_function_decl)),
10258 current_eh_spec_block);
10261 /* If we're saving up tree structure, tie off the function now. */
10262 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
10264 finish_fname_decls ();
10266 /* If this function can't throw any exceptions, remember that. */
10267 if (!processing_template_decl
10268 && !cp_function_chain->can_throw
10269 && !flag_non_call_exceptions)
10270 TREE_NOTHROW (fndecl) = 1;
10272 /* This must come after expand_function_end because cleanups might
10273 have declarations (from inline functions) that need to go into
10274 this function's blocks. */
10276 /* If the current binding level isn't the outermost binding level
10277 for this function, either there is a bug, or we have experienced
10278 syntax errors and the statement tree is malformed. */
10279 if (current_binding_level->kind != sk_function_parms)
10281 /* Make sure we have already experienced errors. */
10282 if (errorcount == 0)
10285 /* Throw away the broken statement tree and extra binding
10287 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
10289 while (current_binding_level->kind != sk_function_parms)
10291 if (current_binding_level->kind == sk_class)
10292 pop_nested_class ();
10294 poplevel (0, 0, 0);
10297 poplevel (1, 0, 1);
10299 /* Statements should always be full-expressions at the outermost set
10300 of curly braces for a function. */
10301 my_friendly_assert (stmts_are_full_exprs_p (), 19990831);
10303 /* Set up the named return value optimization, if we can. Candidate
10304 variables are selected in check_return_value. */
10305 if (current_function_return_value)
10307 tree r = current_function_return_value;
10310 if (r != error_mark_node
10311 /* This is only worth doing for fns that return in memory--and
10312 simpler, since we don't have to worry about promoted modes. */
10313 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
10314 /* Only allow this for variables declared in the outer scope of
10315 the function so we know that their lifetime always ends with a
10316 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10317 we were to do this optimization in tree-ssa. */
10318 && (outer = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl)))
10319 /* Skip the artificial function body block. */
10320 && (outer = BLOCK_SUBBLOCKS (outer))
10321 && chain_member (r, BLOCK_VARS (outer)))
10322 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
10324 current_function_return_value = NULL_TREE;
10327 /* Remember that we were in class scope. */
10328 if (current_class_name)
10329 ctype = current_class_type;
10331 /* Must mark the RESULT_DECL as being in this function. */
10332 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
10334 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10335 to the FUNCTION_DECL node itself. */
10336 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
10338 /* Save away current state, if appropriate. */
10339 if (!processing_template_decl)
10340 save_function_data (fndecl);
10342 /* Complain if there's just no return statement. */
10343 if (warn_return_type
10344 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
10345 && !dependent_type_p (TREE_TYPE (fntype))
10346 && !current_function_returns_value && !current_function_returns_null
10347 /* Don't complain if we abort or throw. */
10348 && !current_function_returns_abnormally
10349 && !DECL_NAME (DECL_RESULT (fndecl))
10350 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10351 inline function, as we might never be compiled separately. */
10352 && (DECL_INLINE (fndecl) || processing_template_decl))
10353 warning ("no return statement in function returning non-void");
10355 /* Store the end of the function, so that we get good line number
10356 info for the epilogue. */
10357 cfun->function_end_locus = input_location;
10359 /* Genericize before inlining. */
10360 if (!processing_template_decl)
10362 cp_genericize (fndecl);
10364 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10365 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
10368 /* We're leaving the context of this function, so zap cfun. It's still in
10369 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10371 current_function_decl = NULL;
10373 /* If this is an in-class inline definition, we may have to pop the
10374 bindings for the template parameters that we added in
10375 maybe_begin_member_template_processing when start_function was
10377 if (inclass_inline)
10378 maybe_end_member_template_processing ();
10380 /* Leave the scope of the class. */
10382 pop_nested_class ();
10388 /* Let the error reporting routines know that we're outside a
10389 function. For a nested function, this value is used in
10390 cxx_pop_function_context and then reset via pop_function_context. */
10391 current_function_decl = NULL_TREE;
10396 /* Create the FUNCTION_DECL for a function definition.
10397 DECLSPECS and DECLARATOR are the parts of the declaration;
10398 they describe the return type and the name of the function,
10399 but twisted together in a fashion that parallels the syntax of C.
10401 This function creates a binding context for the function body
10402 as well as setting up the FUNCTION_DECL in current_function_decl.
10404 Returns a FUNCTION_DECL on success.
10406 If the DECLARATOR is not suitable for a function (it defines a datum
10407 instead), we return 0, which tells yyparse to report a parse error.
10409 May return void_type_node indicating that this method is actually
10410 a friend. See grokfield for more details.
10412 Came here with a `.pushlevel' .
10414 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10415 CHANGES TO CODE IN `grokfield'. */
10418 start_method (cp_decl_specifier_seq *declspecs,
10419 const cp_declarator *declarator, tree attrlist)
10421 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
10424 if (fndecl == error_mark_node)
10425 return error_mark_node;
10427 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
10429 error ("invalid member function declaration");
10430 return error_mark_node;
10434 cplus_decl_attributes (&fndecl, attrlist, 0);
10436 /* Pass friends other than inline friend functions back. */
10437 if (fndecl == void_type_node)
10440 if (DECL_IN_AGGR_P (fndecl))
10442 if (DECL_CONTEXT (fndecl)
10443 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
10444 error ("`%D' is already defined in class `%T'", fndecl,
10445 DECL_CONTEXT (fndecl));
10446 return void_type_node;
10449 check_template_shadow (fndecl);
10451 DECL_DECLARED_INLINE_P (fndecl) = 1;
10452 if (flag_default_inline)
10453 DECL_INLINE (fndecl) = 1;
10455 /* We process method specializations in finish_struct_1. */
10456 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
10458 fndecl = push_template_decl (fndecl);
10459 if (fndecl == error_mark_node)
10463 if (! DECL_FRIEND_P (fndecl))
10465 if (TREE_CHAIN (fndecl))
10467 fndecl = copy_node (fndecl);
10468 TREE_CHAIN (fndecl) = NULL_TREE;
10470 grok_special_member_properties (fndecl);
10473 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
10475 /* Make a place for the parms. */
10476 begin_scope (sk_function_parms, fndecl);
10478 DECL_IN_AGGR_P (fndecl) = 1;
10482 /* Go through the motions of finishing a function definition.
10483 We don't compile this method until after the whole class has
10486 FINISH_METHOD must return something that looks as though it
10487 came from GROKFIELD (since we are defining a method, after all).
10489 This is called after parsing the body of the function definition.
10490 STMTS is the chain of statements that makes up the function body.
10492 DECL is the ..._DECL that `start_method' provided. */
10495 finish_method (tree decl)
10497 tree fndecl = decl;
10502 if (decl == void_type_node)
10505 old_initial = DECL_INITIAL (fndecl);
10507 /* Undo the level for the parms (from start_method).
10508 This is like poplevel, but it causes nothing to be
10509 saved. Saving information here confuses symbol-table
10510 output routines. Besides, this information will
10511 be correctly output when this method is actually
10514 /* Clear out the meanings of the local variables of this level;
10515 also record in each decl which block it belongs to. */
10517 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
10519 if (DECL_NAME (link) != NULL_TREE)
10520 pop_binding (DECL_NAME (link), link);
10521 my_friendly_assert (TREE_CODE (link) != FUNCTION_DECL, 163);
10522 DECL_CONTEXT (link) = NULL_TREE;
10525 poplevel (0, 0, 0);
10527 DECL_INITIAL (fndecl) = old_initial;
10529 /* We used to check if the context of FNDECL was different from
10530 current_class_type as another way to get inside here. This didn't work
10531 for String.cc in libg++. */
10532 if (DECL_FRIEND_P (fndecl))
10534 CLASSTYPE_INLINE_FRIENDS (current_class_type)
10535 = tree_cons (NULL_TREE, fndecl, CLASSTYPE_INLINE_FRIENDS (current_class_type));
10536 decl = void_type_node;
10543 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10544 we can lay it out later, when and if its type becomes complete. */
10547 maybe_register_incomplete_var (tree var)
10549 my_friendly_assert (TREE_CODE (var) == VAR_DECL, 20020406);
10551 /* Keep track of variables with incomplete types. */
10552 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
10553 && DECL_EXTERNAL (var))
10555 tree inner_type = TREE_TYPE (var);
10557 while (TREE_CODE (inner_type) == ARRAY_TYPE)
10558 inner_type = TREE_TYPE (inner_type);
10559 inner_type = TYPE_MAIN_VARIANT (inner_type);
10561 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
10562 /* RTTI TD entries are created while defining the type_info. */
10563 || (TYPE_LANG_SPECIFIC (inner_type)
10564 && TYPE_BEING_DEFINED (inner_type)))
10565 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
10569 /* Called when a class type (given by TYPE) is defined. If there are
10570 any existing VAR_DECLs whose type hsa been completed by this
10571 declaration, update them now. */
10574 complete_vars (tree type)
10576 tree *list = &incomplete_vars;
10578 my_friendly_assert (CLASS_TYPE_P (type), 20020406);
10581 if (same_type_p (type, TREE_PURPOSE (*list)))
10583 tree var = TREE_VALUE (*list);
10584 /* Complete the type of the variable. The VAR_DECL itself
10585 will be laid out in expand_expr. */
10586 complete_type (TREE_TYPE (var));
10587 /* Remove this entry from the list. */
10588 *list = TREE_CHAIN (*list);
10591 list = &TREE_CHAIN (*list);
10594 /* Check for pending declarations which may have abstract type. */
10595 complete_type_check_abstract (type);
10598 /* If DECL is of a type which needs a cleanup, build that cleanup
10602 cxx_maybe_build_cleanup (tree decl)
10604 tree type = TREE_TYPE (decl);
10606 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
10608 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
10611 if (TREE_CODE (type) == ARRAY_TYPE)
10615 cxx_mark_addressable (decl);
10616 rval = build_unary_op (ADDR_EXPR, decl, 0);
10619 /* Optimize for space over speed here. */
10620 if (! TYPE_USES_VIRTUAL_BASECLASSES (type)
10621 || flag_expensive_optimizations)
10622 flags |= LOOKUP_NONVIRTUAL;
10624 rval = build_delete (TREE_TYPE (rval), rval,
10625 sfk_complete_destructor, flags, 0);
10627 if (TYPE_USES_VIRTUAL_BASECLASSES (type)
10628 && ! TYPE_HAS_DESTRUCTOR (type))
10629 rval = build_compound_expr (rval, build_vbase_delete (type, decl));
10636 /* When a stmt has been parsed, this function is called. */
10643 /* DECL was originally constructed as a non-static member function,
10644 but turned out to be static. Update it accordingly. */
10647 revert_static_member_fn (tree decl)
10650 tree function = TREE_TYPE (decl);
10651 tree args = TYPE_ARG_TYPES (function);
10653 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
10654 != TYPE_UNQUALIFIED)
10655 error ("static member function `%#D' declared with type qualifiers",
10658 args = TREE_CHAIN (args);
10659 tmp = build_function_type (TREE_TYPE (function), args);
10660 tmp = build_qualified_type (tmp, cp_type_quals (function));
10661 tmp = build_exception_variant (tmp,
10662 TYPE_RAISES_EXCEPTIONS (function));
10663 TREE_TYPE (decl) = tmp;
10664 if (DECL_ARGUMENTS (decl))
10665 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
10666 DECL_STATIC_FUNCTION_P (decl) = 1;
10669 /* Initialize the variables used during compilation of a C++
10673 cxx_push_function_context (struct function * f)
10675 struct language_function *p
10676 = ggc_alloc_cleared (sizeof (struct language_function));
10679 /* Whenever we start a new function, we destroy temporaries in the
10681 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
10687 if (DECL_SAVED_FUNCTION_DATA (fn))
10689 /* If we already parsed this function, and we're just expanding it
10690 now, restore saved state. */
10691 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
10693 /* We don't need the saved data anymore. Unless this is an inline
10694 function; we need the named return value info for
10695 declare_return_variable. */
10696 if (! DECL_INLINE (fn))
10697 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
10702 /* Free the language-specific parts of F, now that we've finished
10703 compiling the function. */
10706 cxx_pop_function_context (struct function * f)
10711 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
10712 one of the language-independent trees. */
10714 enum cp_tree_node_structure_enum
10715 cp_tree_node_structure (union lang_tree_node * t)
10717 switch (TREE_CODE (&t->generic))
10719 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
10720 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
10721 case OVERLOAD: return TS_CP_OVERLOAD;
10722 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
10723 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
10724 case PTRMEM_CST: return TS_CP_PTRMEM;
10725 case BASELINK: return TS_CP_BASELINK;
10726 default: return TS_CP_GENERIC;
10730 /* Build the void_list_node (void_type_node having been created). */
10732 build_void_list_node (void)
10734 tree t = build_tree_list (NULL_TREE, void_type_node);
10739 cp_missing_noreturn_ok_p (tree decl)
10741 /* A missing noreturn is ok for the `main' function. */
10742 return DECL_MAIN_P (decl);
10745 #include "gt-cp-decl.h"
10746 #include "gtype-cp.h"