1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
53 #include "tree-flow.h"
55 static tree grokparms (cp_parameter_declarator *, tree *);
56 static const char *redeclaration_error_message (tree, tree);
58 static int decl_jump_unsafe (tree);
59 static void require_complete_types_for_parms (tree);
60 static int ambi_op_p (enum tree_code);
61 static int unary_op_p (enum tree_code);
62 static void push_local_name (tree);
63 static tree grok_reference_init (tree, tree, tree, tree *);
64 static tree grokfndecl (tree, tree, tree, tree, tree, int,
65 enum overload_flags, cp_cv_quals,
66 tree, int, int, int, int, int, int, tree);
67 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
69 static void record_unknown_type (tree, const char *);
70 static tree builtin_function_1 (const char *, tree, tree,
71 enum built_in_function code,
72 enum built_in_class cl, const char *,
74 static tree build_library_fn_1 (tree, enum tree_code, tree);
75 static int member_function_or_else (tree, tree, enum overload_flags);
76 static void bad_specifiers (tree, const char *, int, int, int, int,
78 static void check_for_uninitialized_const_var (tree);
79 static hashval_t typename_hash (const void *);
80 static int typename_compare (const void *, const void *);
81 static tree local_variable_p_walkfn (tree *, int *, void *);
82 static tree record_builtin_java_type (const char *, int);
83 static const char *tag_name (enum tag_types code);
84 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
85 static int walk_globals_r (tree, void*);
86 static int walk_vtables_r (tree, void*);
87 static tree make_label_decl (tree, int);
88 static void use_label (tree);
89 static void check_previous_goto_1 (tree, struct cp_binding_level *, tree,
91 static void check_previous_goto (struct named_label_use_list *);
92 static void check_switch_goto (struct cp_binding_level *);
93 static void check_previous_gotos (tree);
94 static void pop_label (tree, tree);
95 static void pop_labels (tree);
96 static void maybe_deduce_size_from_array_init (tree, tree);
97 static void layout_var_decl (tree);
98 static void maybe_commonize_var (tree);
99 static tree check_initializer (tree, tree, int, tree *);
100 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
101 static void save_function_data (tree);
102 static void check_function_type (tree, tree);
103 static void finish_constructor_body (void);
104 static void begin_destructor_body (void);
105 static void finish_destructor_body (void);
106 static tree create_array_type_for_decl (tree, tree, tree);
107 static tree get_atexit_node (void);
108 static tree get_dso_handle_node (void);
109 static tree start_cleanup_fn (void);
110 static void end_cleanup_fn (void);
111 static tree cp_make_fname_decl (tree, int);
112 static void initialize_predefined_identifiers (void);
113 static tree check_special_function_return_type
114 (special_function_kind, tree, tree);
115 static tree push_cp_library_fn (enum tree_code, tree);
116 static tree build_cp_library_fn (tree, enum tree_code, tree);
117 static void store_parm_decls (tree);
118 static void initialize_local_var (tree, tree);
119 static void expand_static_init (tree, tree);
120 static tree next_initializable_field (tree);
121 static tree reshape_init (tree, tree *);
122 static tree build_typename_type (tree, tree, tree);
124 /* Erroneous argument lists can use this *IFF* they do not modify it. */
125 tree error_mark_list;
127 /* The following symbols are subsumed in the cp_global_trees array, and
128 listed here individually for documentation purposes.
131 tree wchar_decl_node;
133 tree vtable_entry_type;
134 tree delta_type_node;
135 tree __t_desc_type_node;
136 tree ti_desc_type_node;
137 tree bltn_desc_type_node, ptr_desc_type_node;
138 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
139 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
140 tree ptm_desc_type_node;
141 tree base_desc_type_node;
143 tree class_type_node;
144 tree unknown_type_node;
146 Array type `vtable_entry_type[]'
149 tree vtbl_ptr_type_node;
156 A FUNCTION_DECL which can call `abort'. Not necessarily the
157 one that the user will declare, but sufficient to be called
158 by routines that want to abort the program.
162 The FUNCTION_DECL for the default `::operator delete'.
164 tree global_delete_fndecl;
167 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
172 tree cp_global_trees[CPTI_MAX];
174 /* Indicates that there is a type value in some namespace, although
175 that is not necessarily in scope at the moment. */
177 tree global_type_node;
179 /* The node that holds the "name" of the global scope. */
180 tree global_scope_name;
182 /* Used only for jumps to as-yet undefined labels, since jumps to
183 defined labels can have their validity checked immediately. */
185 struct named_label_use_list GTY(())
187 struct cp_binding_level *binding_level;
190 location_t o_goto_locus;
191 struct named_label_use_list *next;
194 #define named_label_uses cp_function_chain->x_named_label_uses
196 #define local_names cp_function_chain->x_local_names
198 /* A list of objects which have constructors or destructors
199 which reside in the global scope. The decl is stored in
200 the TREE_VALUE slot and the initializer is stored
201 in the TREE_PURPOSE slot. */
202 tree static_aggregates;
206 /* A node for the integer constants 2, and 3. */
208 tree integer_two_node, integer_three_node;
210 /* A list of all LABEL_DECLs in the function that have names. Here so
211 we can clear out their names' definitions at the end of the
212 function, and so we can check the validity of jumps to these labels. */
214 struct named_label_list GTY(())
216 struct cp_binding_level *binding_level;
221 struct named_label_list *next;
222 unsigned int in_try_scope : 1;
223 unsigned int in_catch_scope : 1;
226 #define named_labels cp_function_chain->x_named_labels
228 /* The number of function bodies which we are currently processing.
229 (Zero if we are at namespace scope, one inside the body of a
230 function, two inside the body of a function in a local class, etc.) */
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
238 enum deprecated_states {
243 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
245 /* True if a declaration with an `extern' linkage specifier is being
247 bool have_extern_spec;
250 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
251 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
252 time the VAR_DECL was declared, the type was incomplete. */
254 static GTY(()) tree incomplete_vars;
256 /* Returns the kind of template specialization we are currently
257 processing, given that it's declaration contained N_CLASS_SCOPES
258 explicit scope qualifications. */
261 current_tmpl_spec_kind (int n_class_scopes)
263 int n_template_parm_scopes = 0;
264 int seen_specialization_p = 0;
265 int innermost_specialization_p = 0;
266 struct cp_binding_level *b;
268 /* Scan through the template parameter scopes. */
269 for (b = current_binding_level;
270 b->kind == sk_template_parms;
273 /* If we see a specialization scope inside a parameter scope,
274 then something is wrong. That corresponds to a declaration
277 template <class T> template <> ...
279 which is always invalid since [temp.expl.spec] forbids the
280 specialization of a class member template if the enclosing
281 class templates are not explicitly specialized as well. */
282 if (b->explicit_spec_p)
284 if (n_template_parm_scopes == 0)
285 innermost_specialization_p = 1;
287 seen_specialization_p = 1;
289 else if (seen_specialization_p == 1)
290 return tsk_invalid_member_spec;
292 ++n_template_parm_scopes;
295 /* Handle explicit instantiations. */
296 if (processing_explicit_instantiation)
298 if (n_template_parm_scopes != 0)
299 /* We've seen a template parameter list during an explicit
300 instantiation. For example:
302 template <class T> template void f(int);
304 This is erroneous. */
305 return tsk_invalid_expl_inst;
307 return tsk_expl_inst;
310 if (n_template_parm_scopes < n_class_scopes)
311 /* We've not seen enough template headers to match all the
312 specialized classes present. For example:
314 template <class T> void R<T>::S<T>::f(int);
316 This is invalid; there needs to be one set of template
317 parameters for each class. */
318 return tsk_insufficient_parms;
319 else if (n_template_parm_scopes == n_class_scopes)
320 /* We're processing a non-template declaration (even though it may
321 be a member of a template class.) For example:
323 template <class T> void S<T>::f(int);
325 The `class T' maches the `S<T>', leaving no template headers
326 corresponding to the `f'. */
328 else if (n_template_parm_scopes > n_class_scopes + 1)
329 /* We've got too many template headers. For example:
331 template <> template <class T> void f (T);
333 There need to be more enclosing classes. */
334 return tsk_excessive_parms;
336 /* This must be a template. It's of the form:
338 template <class T> template <class U> void S<T>::f(U);
340 This is a specialization if the innermost level was a
341 specialization; otherwise it's just a definition of the
343 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
346 /* Exit the current scope. */
354 /* When a label goes out of scope, check to see if that label was used
355 in a valid manner, and issue any appropriate warnings or errors. */
358 pop_label (tree label, tree old_value)
360 if (!processing_template_decl)
362 if (DECL_INITIAL (label) == NULL_TREE)
366 cp_error_at ("label `%D' used but not defined", label);
367 #ifdef USE_MAPPED_LOCATION
368 location = input_location; /* FIXME want (input_filename, (line)0) */
370 location.file = input_filename;
373 /* Avoid crashing later. */
374 define_label (location, DECL_NAME (label));
376 else if (warn_unused_label && !TREE_USED (label))
377 cp_warning_at ("label `%D' defined but not used", label);
380 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
383 /* At the end of a function, all labels declared within the function
384 go out of scope. BLOCK is the top-level block for the
388 pop_labels (tree block)
390 struct named_label_list *link;
392 /* Clear out the definitions of all label names, since their scopes
394 for (link = named_labels; link; link = link->next)
396 pop_label (link->label_decl, link->old_value);
397 /* Put the labels into the "variables" of the top-level block,
398 so debugger can see them. */
399 TREE_CHAIN (link->label_decl) = BLOCK_VARS (block);
400 BLOCK_VARS (block) = link->label_decl;
406 /* The following two routines are used to interface to Objective-C++.
407 The binding level is purposely treated as an opaque type. */
410 objc_get_current_scope (void)
412 return current_binding_level;
415 /* The following routine is used by the NeXT-style SJLJ exceptions;
416 variables get marked 'volatile' so as to not be clobbered by
417 _setjmp()/_longjmp() calls. All variables in the current scope,
418 as well as parent scopes up to (but not including) ENCLOSING_BLK
419 shall be thusly marked. */
422 objc_mark_locals_volatile (void *enclosing_blk)
424 struct cp_binding_level *scope;
426 for (scope = current_binding_level;
427 scope && scope != enclosing_blk && scope->kind == sk_block;
428 scope = scope->level_chain)
432 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
434 if (TREE_CODE (decl) == VAR_DECL)
436 DECL_REGISTER (decl) = 0;
437 TREE_THIS_VOLATILE (decl) = 1;
443 /* Exit a binding level.
444 Pop the level off, and restore the state of the identifier-decl mappings
445 that were in effect when this level was entered.
447 If KEEP == 1, this level had explicit declarations, so
448 and create a "block" (a BLOCK node) for the level
449 to record its declarations and subblocks for symbol table output.
451 If FUNCTIONBODY is nonzero, this level is the body of a function,
452 so create a block as if KEEP were set and also clear out all
455 If REVERSE is nonzero, reverse the order of decls before putting
456 them into the BLOCK. */
459 poplevel (int keep, int reverse, int functionbody)
462 /* The chain of decls was accumulated in reverse order.
463 Put it into forward order, just for cleanliness. */
465 int tmp = functionbody;
466 int real_functionbody;
470 int leaving_for_scope;
473 timevar_push (TV_NAME_LOOKUP);
478 gcc_assert (current_binding_level->kind != sk_class);
480 real_functionbody = (current_binding_level->kind == sk_cleanup
481 ? ((functionbody = 0), tmp) : functionbody);
482 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
484 gcc_assert (!VEC_length(cp_class_binding,
485 current_binding_level->class_shadowed));
487 /* We used to use KEEP == 2 to indicate that the new block should go
488 at the beginning of the list of blocks at this binding level,
489 rather than the end. This hack is no longer used. */
490 gcc_assert (keep == 0 || keep == 1);
492 if (current_binding_level->keep)
495 /* Any uses of undefined labels, and any defined labels, now operate
496 under constraints of next binding contour. */
497 if (cfun && !functionbody)
499 struct cp_binding_level *level_chain;
500 level_chain = current_binding_level->level_chain;
503 struct named_label_use_list *uses;
504 struct named_label_list *labels;
505 for (labels = named_labels; labels; labels = labels->next)
506 if (labels->binding_level == current_binding_level)
509 if (current_binding_level->kind == sk_try)
510 labels->in_try_scope = 1;
511 if (current_binding_level->kind == sk_catch)
512 labels->in_catch_scope = 1;
513 for (decl = labels->names_in_scope; decl;
514 decl = TREE_CHAIN (decl))
515 if (decl_jump_unsafe (decl))
516 labels->bad_decls = tree_cons (NULL_TREE, decl,
518 labels->binding_level = level_chain;
519 labels->names_in_scope = level_chain->names;
522 for (uses = named_label_uses; uses; uses = uses->next)
523 if (uses->binding_level == current_binding_level)
525 uses->binding_level = level_chain;
526 uses->names_in_scope = level_chain->names;
531 /* Get the decls in the order they were written.
532 Usually current_binding_level->names is in reverse order.
533 But parameter decls were previously put in forward order. */
536 current_binding_level->names
537 = decls = nreverse (current_binding_level->names);
539 decls = current_binding_level->names;
541 /* If there were any declarations or structure tags in that level,
542 or if this level is a function body,
543 create a BLOCK to record them for the life of this function. */
545 if (keep == 1 || functionbody)
546 block = make_node (BLOCK);
547 if (block != NULL_TREE)
549 BLOCK_VARS (block) = decls;
550 BLOCK_SUBBLOCKS (block) = subblocks;
553 /* In each subblock, record that this is its superior. */
555 for (link = subblocks; link; link = TREE_CHAIN (link))
556 BLOCK_SUPERCONTEXT (link) = block;
558 /* We still support the old for-scope rules, whereby the variables
559 in a for-init statement were in scope after the for-statement
560 ended. We only use the new rules if flag_new_for_scope is
563 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
565 /* Before we remove the declarations first check for unused variables. */
566 if (warn_unused_variable
567 && !processing_template_decl)
568 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
569 if (TREE_CODE (decl) == VAR_DECL
570 && ! TREE_USED (decl)
571 && ! DECL_IN_SYSTEM_HEADER (decl)
572 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
573 warning ("%Junused variable '%D'", decl, decl);
575 /* Remove declarations for all the DECLs in this level. */
576 for (link = decls; link; link = TREE_CHAIN (link))
578 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
581 tree name = DECL_NAME (link);
585 ob = outer_binding (name,
586 IDENTIFIER_BINDING (name),
589 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
591 ns_binding = NULL_TREE;
593 if (ob && ob->scope == current_binding_level->level_chain)
594 /* We have something like:
599 and we are leaving the `for' scope. There's no reason to
600 keep the binding of the inner `i' in this case. */
601 pop_binding (name, link);
602 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
603 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
604 /* Here, we have something like:
612 We must pop the for-scope binding so we know what's a
613 type and what isn't. */
614 pop_binding (name, link);
617 /* Mark this VAR_DECL as dead so that we can tell we left it
618 there only for backward compatibility. */
619 DECL_DEAD_FOR_LOCAL (link) = 1;
621 /* Keep track of what should have happened when we
622 popped the binding. */
624 DECL_SHADOWED_FOR_VAR (link) = ob->value;
626 /* Add it to the list of dead variables in the next
627 outermost binding to that we can remove these when we
628 leave that binding. */
629 current_binding_level->level_chain->dead_vars_from_for
630 = tree_cons (NULL_TREE, link,
631 current_binding_level->level_chain->
634 /* Although we don't pop the cxx_binding, we do clear
635 its SCOPE since the scope is going away now. */
636 IDENTIFIER_BINDING (name)->scope
637 = current_binding_level->level_chain;
644 /* Remove the binding. */
647 if (TREE_CODE (decl) == TREE_LIST)
648 decl = TREE_VALUE (decl);
651 if (TREE_CODE (name) == OVERLOAD)
652 name = OVL_FUNCTION (name);
654 gcc_assert (DECL_P (name));
655 pop_binding (DECL_NAME (name), decl);
659 /* Remove declarations for any `for' variables from inner scopes
660 that we kept around. */
661 for (link = current_binding_level->dead_vars_from_for;
662 link; link = TREE_CHAIN (link))
663 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
665 /* Restore the IDENTIFIER_TYPE_VALUEs. */
666 for (link = current_binding_level->type_shadowed;
667 link; link = TREE_CHAIN (link))
668 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
670 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
671 for (link = current_binding_level->shadowed_labels;
673 link = TREE_CHAIN (link))
674 pop_label (TREE_VALUE (link), TREE_PURPOSE (link));
676 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
677 list if a `using' declaration put them there. The debugging
678 back-ends won't understand OVERLOAD, so we remove them here.
679 Because the BLOCK_VARS are (temporarily) shared with
680 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
681 popped all the bindings. */
686 for (d = &BLOCK_VARS (block); *d; )
688 if (TREE_CODE (*d) == TREE_LIST)
689 *d = TREE_CHAIN (*d);
691 d = &TREE_CHAIN (*d);
695 /* If the level being exited is the top level of a function,
696 check over all the labels. */
699 /* Since this is the top level block of a function, the vars are
700 the function's parameters. Don't leave them in the BLOCK
701 because they are found in the FUNCTION_DECL instead. */
702 BLOCK_VARS (block) = 0;
706 kind = current_binding_level->kind;
707 if (kind == sk_cleanup)
711 /* If this is a temporary binding created for a cleanup, then we'll
712 have pushed a statement list level. Pop that, create a new
713 BIND_EXPR for the block, and insert it into the stream. */
714 stmt = pop_stmt_list (current_binding_level->statement_list);
715 stmt = c_build_bind_expr (block, stmt);
721 DECL_INITIAL (current_function_decl) = block;
723 current_binding_level->blocks
724 = chainon (current_binding_level->blocks, block);
726 /* If we did not make a block for the level just exited,
727 any blocks made for inner levels
728 (since they cannot be recorded as subblocks in that level)
729 must be carried forward so they will later become subblocks
730 of something else. */
732 current_binding_level->blocks
733 = chainon (current_binding_level->blocks, subblocks);
735 /* Each and every BLOCK node created here in `poplevel' is important
736 (e.g. for proper debugging information) so if we created one
737 earlier, mark it as "used". */
739 TREE_USED (block) = 1;
741 /* All temporary bindings created for cleanups are popped silently. */
742 if (kind == sk_cleanup)
745 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
748 /* Delete the node BLOCK from the current binding level.
749 This is used for the block inside a stmt expr ({...})
750 so that the block can be reinserted where appropriate. */
753 delete_block (tree block)
756 if (current_binding_level->blocks == block)
757 current_binding_level->blocks = TREE_CHAIN (block);
758 for (t = current_binding_level->blocks; t;)
760 if (TREE_CHAIN (t) == block)
761 TREE_CHAIN (t) = TREE_CHAIN (block);
765 TREE_CHAIN (block) = NULL_TREE;
766 /* Clear TREE_USED which is always set by poplevel.
767 The flag is set again if insert_block is called. */
768 TREE_USED (block) = 0;
771 /* Insert BLOCK at the end of the list of subblocks of the
772 current binding level. This is used when a BIND_EXPR is expanded,
773 to handle the BLOCK node inside the BIND_EXPR. */
776 insert_block (tree block)
778 TREE_USED (block) = 1;
779 current_binding_level->blocks
780 = chainon (current_binding_level->blocks, block);
783 /* Returns nonzero if T is a virtual function table. */
786 vtable_decl_p (tree t, void* data ATTRIBUTE_UNUSED )
788 return (TREE_CODE (t) == VAR_DECL && DECL_VIRTUAL_P (t));
791 /* Returns nonzero if T is a TYPE_DECL for a type with virtual
795 vtype_decl_p (tree t, void *data ATTRIBUTE_UNUSED )
797 return (TREE_CODE (t) == TYPE_DECL
798 && TREE_CODE (TREE_TYPE (t)) == RECORD_TYPE
799 && TYPE_POLYMORPHIC_P (TREE_TYPE (t)));
802 struct walk_globals_data {
808 /* Walk the vtable declarations in NAMESPACE. Whenever one is found
809 for which P returns nonzero, call F with its address. If any call
810 to F returns a nonzero value, return a nonzero value. */
813 walk_vtables_r (tree namespace, void* data)
815 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
816 walk_globals_fn f = wgd->f;
818 tree decl = NAMESPACE_LEVEL (namespace)->vtables;
821 for (; decl ; decl = TREE_CHAIN (decl))
822 result |= (*f) (&decl, d);
827 /* Walk the vtable declarations. Whenever one is found for which P
828 returns nonzero, call F with its address. If any call to F
829 returns a nonzero value, return a nonzero value. */
831 walk_vtables (walk_globals_pred p, walk_globals_fn f, void *data)
833 struct walk_globals_data wgd;
838 return walk_namespaces (walk_vtables_r, &wgd);
841 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
842 itself, calling F for each. The DATA is passed to F as well. */
845 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
848 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
850 result |= (*f) (namespace, data);
852 for (; current; current = TREE_CHAIN (current))
853 result |= walk_namespaces_r (current, f, data);
858 /* Walk all the namespaces, calling F for each. The DATA is passed to
862 walk_namespaces (walk_namespaces_fn f, void* data)
864 return walk_namespaces_r (global_namespace, f, data);
867 /* Walk the global declarations in NAMESPACE. Whenever one is found
868 for which P returns nonzero, call F with its address. If any call
869 to F returns a nonzero value, return a nonzero value. */
872 walk_globals_r (tree namespace, void* data)
874 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
875 walk_globals_pred p = wgd->p;
876 walk_globals_fn f = wgd->f;
881 t = &NAMESPACE_LEVEL (namespace)->names;
888 result |= (*f) (t, d);
890 /* If F changed *T, then *T still points at the next item to
893 t = &TREE_CHAIN (*t);
899 /* Walk the global declarations. Whenever one is found for which P
900 returns true, call F with its address. If any call to F
901 returns true, return true. */
904 walk_globals (walk_globals_pred p, walk_globals_fn f, void *data)
906 struct walk_globals_data wgd;
911 return walk_namespaces (walk_globals_r, &wgd);
914 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
915 DATA is non-NULL, this is the last time we will call
916 wrapup_global_declarations for this NAMESPACE. */
919 wrapup_globals_for_namespace (tree namespace, void* data)
921 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
922 varray_type statics = level->static_decls;
923 tree *vec = &VARRAY_TREE (statics, 0);
924 int len = VARRAY_ACTIVE_SIZE (statics);
925 int last_time = (data != 0);
929 check_global_declarations (vec, len);
933 /* Write out any globals that need to be output. */
934 return wrapup_global_declarations (vec, len);
938 /* In C++, you don't have to write `struct S' to refer to `S'; you
939 can just use `S'. We accomplish this by creating a TYPE_DECL as
940 if the user had written `typedef struct S S'. Create and return
941 the TYPE_DECL for TYPE. */
944 create_implicit_typedef (tree name, tree type)
948 decl = build_decl (TYPE_DECL, name, type);
949 DECL_ARTIFICIAL (decl) = 1;
950 /* There are other implicit type declarations, like the one *within*
951 a class that allows you to write `S::S'. We must distinguish
953 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
954 TYPE_NAME (type) = decl;
959 /* Remember a local name for name-mangling purposes. */
962 push_local_name (tree decl)
967 timevar_push (TV_NAME_LOOKUP);
969 VARRAY_TREE_INIT (local_names, 8, "local_names");
971 name = DECL_NAME (decl);
973 nelts = VARRAY_ACTIVE_SIZE (local_names);
974 for (i = 0; i < nelts; i++)
976 t = VARRAY_TREE (local_names, i);
977 if (DECL_NAME (t) == name)
979 if (!DECL_LANG_SPECIFIC (decl))
980 retrofit_lang_decl (decl);
981 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
982 if (DECL_LANG_SPECIFIC (t))
983 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
985 DECL_DISCRIMINATOR (decl) = 1;
987 VARRAY_TREE (local_names, i) = decl;
988 timevar_pop (TV_NAME_LOOKUP);
993 VARRAY_PUSH_TREE (local_names, decl);
994 timevar_pop (TV_NAME_LOOKUP);
997 /* Subroutine of duplicate_decls: return truthvalue of whether
998 or not types of these decls match.
1000 For C++, we must compare the parameter list so that `int' can match
1001 `int&' in a parameter position, but `int&' is not confused with
1005 decls_match (tree newdecl, tree olddecl)
1009 if (newdecl == olddecl)
1012 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
1013 /* If the two DECLs are not even the same kind of thing, we're not
1014 interested in their types. */
1017 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1019 tree f1 = TREE_TYPE (newdecl);
1020 tree f2 = TREE_TYPE (olddecl);
1021 tree p1 = TYPE_ARG_TYPES (f1);
1022 tree p2 = TYPE_ARG_TYPES (f2);
1024 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1025 && ! (DECL_EXTERN_C_P (newdecl)
1026 && DECL_EXTERN_C_P (olddecl)))
1029 if (TREE_CODE (f1) != TREE_CODE (f2))
1032 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
1034 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
1035 && (DECL_BUILT_IN (olddecl)
1036 #ifndef NO_IMPLICIT_EXTERN_C
1037 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
1038 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
1042 types_match = self_promoting_args_p (p1);
1043 if (p1 == void_list_node)
1044 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1046 #ifndef NO_IMPLICIT_EXTERN_C
1047 else if (p1 == NULL_TREE
1048 && (DECL_EXTERN_C_P (olddecl)
1049 && DECL_IN_SYSTEM_HEADER (olddecl)
1050 && !DECL_CLASS_SCOPE_P (olddecl))
1051 && (DECL_EXTERN_C_P (newdecl)
1052 && DECL_IN_SYSTEM_HEADER (newdecl)
1053 && !DECL_CLASS_SCOPE_P (newdecl)))
1055 types_match = self_promoting_args_p (p2);
1056 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1060 types_match = compparms (p1, p2);
1065 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1067 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1068 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1071 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1072 DECL_TEMPLATE_PARMS (olddecl)))
1075 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1076 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1077 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1079 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1080 DECL_TEMPLATE_RESULT (newdecl));
1084 if (TREE_TYPE (newdecl) == error_mark_node)
1085 types_match = TREE_TYPE (olddecl) == error_mark_node;
1086 else if (TREE_TYPE (olddecl) == NULL_TREE)
1087 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1088 else if (TREE_TYPE (newdecl) == NULL_TREE)
1091 types_match = comptypes (TREE_TYPE (newdecl),
1092 TREE_TYPE (olddecl),
1093 COMPARE_REDECLARATION);
1099 /* If NEWDECL is `static' and an `extern' was seen previously,
1100 warn about it. OLDDECL is the previous declaration.
1102 Note that this does not apply to the C++ case of declaring
1103 a variable `extern const' and then later `const'.
1105 Don't complain about built-in functions, since they are beyond
1106 the user's control. */
1109 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1113 if (TREE_CODE (newdecl) == TYPE_DECL
1114 || TREE_CODE (newdecl) == TEMPLATE_DECL
1115 || TREE_CODE (newdecl) == CONST_DECL
1116 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1119 /* Don't get confused by static member functions; that's a different
1121 if (TREE_CODE (newdecl) == FUNCTION_DECL
1122 && DECL_STATIC_FUNCTION_P (newdecl))
1125 /* If the old declaration was `static', or the new one isn't, then
1126 then everything is OK. */
1127 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1130 /* It's OK to declare a builtin function as `static'. */
1131 if (TREE_CODE (olddecl) == FUNCTION_DECL
1132 && DECL_ARTIFICIAL (olddecl))
1135 name = DECL_ASSEMBLER_NAME (newdecl);
1136 pedwarn ("`%D' was declared `extern' and later `static'", newdecl);
1137 cp_pedwarn_at ("previous declaration of `%D'", olddecl);
1140 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1141 If the redeclaration is invalid, a diagnostic is issued, and the
1142 error_mark_node is returned. Otherwise, OLDDECL is returned.
1144 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1148 duplicate_decls (tree newdecl, tree olddecl)
1150 unsigned olddecl_uid = DECL_UID (olddecl);
1151 int olddecl_friend = 0, types_match = 0;
1152 int new_defines_function = 0;
1154 if (newdecl == olddecl)
1157 types_match = decls_match (newdecl, olddecl);
1159 /* If either the type of the new decl or the type of the old decl is an
1160 error_mark_node, then that implies that we have already issued an
1161 error (earlier) for some bogus type specification, and in that case,
1162 it is rather pointless to harass the user with yet more error message
1163 about the same declaration, so just pretend the types match here. */
1164 if (TREE_TYPE (newdecl) == error_mark_node
1165 || TREE_TYPE (olddecl) == error_mark_node)
1168 if (DECL_P (olddecl)
1169 && TREE_CODE (newdecl) == FUNCTION_DECL
1170 && TREE_CODE (olddecl) == FUNCTION_DECL
1171 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1173 if (DECL_DECLARED_INLINE_P (newdecl)
1174 && DECL_UNINLINABLE (newdecl)
1175 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1176 /* Already warned elsewhere. */;
1177 else if (DECL_DECLARED_INLINE_P (olddecl)
1178 && DECL_UNINLINABLE (olddecl)
1179 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1180 /* Already warned. */;
1181 else if (DECL_DECLARED_INLINE_P (newdecl)
1182 && DECL_UNINLINABLE (olddecl)
1183 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1185 warning ("%Jfunction '%D' redeclared as inline", newdecl, newdecl);
1186 warning ("%Jprevious declaration of '%D' with attribute noinline",
1189 else if (DECL_DECLARED_INLINE_P (olddecl)
1190 && DECL_UNINLINABLE (newdecl)
1191 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1193 warning ("%Jfunction '%D' redeclared with attribute noinline",
1195 warning ("%Jprevious declaration of '%D' was inline",
1200 /* Check for redeclaration and other discrepancies. */
1201 if (TREE_CODE (olddecl) == FUNCTION_DECL
1202 && DECL_ARTIFICIAL (olddecl))
1204 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1206 /* Avoid warnings redeclaring anticipated built-ins. */
1207 if (DECL_ANTICIPATED (olddecl))
1210 /* If you declare a built-in or predefined function name as static,
1211 the old definition is overridden, but optionally warn this was a
1212 bad choice of name. */
1213 if (! TREE_PUBLIC (newdecl))
1216 warning ("shadowing %s function `%#D'",
1217 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1219 /* Discard the old built-in function. */
1222 /* If the built-in is not ansi, then programs can override
1223 it even globally without an error. */
1224 else if (! DECL_BUILT_IN (olddecl))
1225 warning ("library function `%#D' redeclared as non-function `%#D'",
1229 error ("declaration of `%#D'", newdecl);
1230 error ("conflicts with built-in declaration `%#D'",
1235 else if (!types_match)
1237 /* Avoid warnings redeclaring anticipated built-ins. */
1238 if (DECL_ANTICIPATED (olddecl))
1240 /* Deal with fileptr_type_node. FILE type is not known
1241 at the time we create the builtins. */
1244 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1245 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1247 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1250 else if (TREE_VALUE (t2) == fileptr_type_node)
1252 tree t = TREE_VALUE (t1);
1254 if (TREE_CODE (t) == POINTER_TYPE
1255 && TYPE_NAME (TREE_TYPE (t))
1256 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1257 == get_identifier ("FILE")
1258 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1260 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1262 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1263 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1264 types_match = decls_match (newdecl, olddecl);
1266 return duplicate_decls (newdecl, olddecl);
1267 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1270 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1273 else if ((DECL_EXTERN_C_P (newdecl)
1274 && DECL_EXTERN_C_P (olddecl))
1275 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1276 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1278 /* A near match; override the builtin. */
1280 if (TREE_PUBLIC (newdecl))
1282 warning ("new declaration `%#D'", newdecl);
1283 warning ("ambiguates built-in declaration `%#D'",
1286 else if (warn_shadow)
1287 warning ("shadowing %s function `%#D'",
1288 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1292 /* Discard the old built-in function. */
1295 /* Replace the old RTL to avoid problems with inlining. */
1296 COPY_DECL_RTL (newdecl, olddecl);
1298 /* Even if the types match, prefer the new declarations type
1299 for anticipated built-ins, for exception lists, etc... */
1300 else if (DECL_ANTICIPATED (olddecl))
1302 tree type = TREE_TYPE (newdecl);
1303 tree attribs = (*targetm.merge_type_attributes)
1304 (TREE_TYPE (olddecl), type);
1306 type = cp_build_type_attribute_variant (type, attribs);
1307 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1310 /* Whether or not the builtin can throw exceptions has no
1311 bearing on this declarator. */
1312 TREE_NOTHROW (olddecl) = 0;
1314 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1316 /* If a builtin function is redeclared as `static', merge
1317 the declarations, but make the original one static. */
1318 DECL_THIS_STATIC (olddecl) = 1;
1319 TREE_PUBLIC (olddecl) = 0;
1321 /* Make the old declaration consistent with the new one so
1322 that all remnants of the builtin-ness of this function
1323 will be banished. */
1324 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1325 COPY_DECL_RTL (newdecl, olddecl);
1328 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1330 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1331 && TREE_CODE (newdecl) != TYPE_DECL
1332 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1333 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1334 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1335 && TREE_CODE (olddecl) != TYPE_DECL
1336 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1337 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1340 /* We do nothing special here, because C++ does such nasty
1341 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1342 get shadowed, and know that if we need to find a TYPE_DECL
1343 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1344 slot of the identifier. */
1348 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1349 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1350 || (TREE_CODE (olddecl) == FUNCTION_DECL
1351 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1354 error ("`%#D' redeclared as different kind of symbol", newdecl);
1355 if (TREE_CODE (olddecl) == TREE_LIST)
1356 olddecl = TREE_VALUE (olddecl);
1357 cp_error_at ("previous declaration of `%#D'", olddecl);
1359 return error_mark_node;
1361 else if (!types_match)
1363 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1364 /* These are certainly not duplicate declarations; they're
1365 from different scopes. */
1368 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1370 /* The name of a class template may not be declared to refer to
1371 any other template, class, function, object, namespace, value,
1372 or type in the same scope. */
1373 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1374 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1376 error ("declaration of template `%#D'", newdecl);
1377 cp_error_at ("conflicts with previous declaration `%#D'",
1380 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1381 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1382 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1383 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1384 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1385 DECL_TEMPLATE_PARMS (olddecl))
1386 /* Template functions can be disambiguated by
1388 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1389 TREE_TYPE (TREE_TYPE (olddecl))))
1391 error ("new declaration `%#D'", newdecl);
1392 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
1396 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1398 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1400 error ("declaration of C function `%#D' conflicts with",
1402 cp_error_at ("previous declaration `%#D' here", olddecl);
1404 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1405 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1407 error ("new declaration `%#D'", newdecl);
1408 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
1415 error ("conflicting declaration '%#D'", newdecl);
1416 cp_error_at ("'%D' has a previous declaration as `%#D'",
1421 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1422 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1423 && (!DECL_TEMPLATE_INFO (newdecl)
1424 || (DECL_TI_TEMPLATE (newdecl)
1425 != DECL_TI_TEMPLATE (olddecl))))
1426 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1427 && (!DECL_TEMPLATE_INFO (olddecl)
1428 || (DECL_TI_TEMPLATE (olddecl)
1429 != DECL_TI_TEMPLATE (newdecl))))))
1430 /* It's OK to have a template specialization and a non-template
1431 with the same type, or to have specializations of two
1432 different templates with the same type. Note that if one is a
1433 specialization, and the other is an instantiation of the same
1434 template, that we do not exit at this point. That situation
1435 can occur if we instantiate a template class, and then
1436 specialize one of its methods. This situation is valid, but
1437 the declarations must be merged in the usual way. */
1439 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1440 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1441 && !DECL_USE_TEMPLATE (newdecl))
1442 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1443 && !DECL_USE_TEMPLATE (olddecl))))
1444 /* One of the declarations is a template instantiation, and the
1445 other is not a template at all. That's OK. */
1447 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1449 /* In [namespace.alias] we have:
1451 In a declarative region, a namespace-alias-definition can be
1452 used to redefine a namespace-alias declared in that declarative
1453 region to refer only to the namespace to which it already
1456 Therefore, if we encounter a second alias directive for the same
1457 alias, we can just ignore the second directive. */
1458 if (DECL_NAMESPACE_ALIAS (newdecl)
1459 && (DECL_NAMESPACE_ALIAS (newdecl)
1460 == DECL_NAMESPACE_ALIAS (olddecl)))
1462 /* [namespace.alias]
1464 A namespace-name or namespace-alias shall not be declared as
1465 the name of any other entity in the same declarative region.
1466 A namespace-name defined at global scope shall not be
1467 declared as the name of any other entity in any global scope
1469 error ("declaration of `namespace %D' conflicts with", newdecl);
1470 cp_error_at ("previous declaration of `namespace %D' here", olddecl);
1471 return error_mark_node;
1475 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1478 error (errmsg, newdecl);
1479 if (DECL_NAME (olddecl) != NULL_TREE)
1480 cp_error_at ((DECL_INITIAL (olddecl)
1481 && namespace_bindings_p ())
1482 ? "`%#D' previously defined here"
1483 : "`%#D' previously declared here", olddecl);
1484 return error_mark_node;
1486 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1487 && DECL_INITIAL (olddecl) != NULL_TREE
1488 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1489 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1491 /* Prototype decl follows defn w/o prototype. */
1492 cp_warning_at ("prototype for `%#D'", newdecl);
1493 warning ("%Jfollows non-prototype definition here", olddecl);
1495 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1496 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1498 /* extern "C" int foo ();
1499 int foo () { bar (); }
1501 if (current_lang_depth () == 0)
1502 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1505 cp_error_at ("previous declaration of `%#D' with %L linkage",
1506 olddecl, DECL_LANGUAGE (olddecl));
1507 error ("conflicts with new declaration with %L linkage",
1508 DECL_LANGUAGE (newdecl));
1512 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1514 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1516 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1517 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1520 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1521 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1523 for (; t1 && t1 != void_list_node;
1524 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1525 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1527 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1530 pedwarn ("default argument given for parameter %d of `%#D'",
1532 cp_pedwarn_at ("after previous specification in `%#D'",
1537 error ("default argument given for parameter %d of `%#D'",
1539 cp_error_at ("after previous specification in `%#D'",
1544 if (DECL_DECLARED_INLINE_P (newdecl)
1545 && ! DECL_DECLARED_INLINE_P (olddecl)
1546 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1548 warning ("`%#D' was used before it was declared inline", newdecl);
1549 warning ("%Jprevious non-inline declaration here", olddecl);
1554 /* Do not merge an implicit typedef with an explicit one. In:
1558 typedef class A A __attribute__ ((foo));
1560 the attribute should apply only to the typedef. */
1561 if (TREE_CODE (olddecl) == TYPE_DECL
1562 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1563 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1566 /* If new decl is `static' and an `extern' was seen previously,
1568 warn_extern_redeclared_static (newdecl, olddecl);
1570 /* We have committed to returning 1 at this point. */
1571 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1573 /* Now that functions must hold information normally held
1574 by field decls, there is extra work to do so that
1575 declaration information does not get destroyed during
1577 if (DECL_VINDEX (olddecl))
1578 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1579 if (DECL_CONTEXT (olddecl))
1580 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1581 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1582 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1583 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1584 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1585 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1586 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1587 SET_OVERLOADED_OPERATOR_CODE
1588 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1589 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1591 /* Optionally warn about more than one declaration for the same
1592 name, but don't warn about a function declaration followed by a
1594 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1595 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1596 /* Don't warn about extern decl followed by definition. */
1597 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1598 /* Don't warn about friends, let add_friend take care of it. */
1599 && ! (DECL_FRIEND_P (newdecl) || DECL_FRIEND_P (olddecl)))
1601 warning ("redundant redeclaration of `%D' in same scope", newdecl);
1602 cp_warning_at ("previous declaration of `%D'", olddecl);
1606 /* Deal with C++: must preserve virtual function table size. */
1607 if (TREE_CODE (olddecl) == TYPE_DECL)
1609 tree newtype = TREE_TYPE (newdecl);
1610 tree oldtype = TREE_TYPE (olddecl);
1612 if (newtype != error_mark_node && oldtype != error_mark_node
1613 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1614 CLASSTYPE_FRIEND_CLASSES (newtype)
1615 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1617 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1620 /* Copy all the DECL_... slots specified in the new decl
1621 except for any that we copy here from the old type. */
1622 DECL_ATTRIBUTES (newdecl)
1623 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1625 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1627 TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
1628 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1629 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1630 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1632 /* If the new declaration is a definition, update the file and
1633 line information on the declaration. */
1634 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)) == NULL_TREE
1635 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl)) != NULL_TREE)
1637 DECL_SOURCE_LOCATION (olddecl)
1638 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl))
1639 = DECL_SOURCE_LOCATION (newdecl);
1640 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1641 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl))
1642 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl));
1645 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1647 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl))
1648 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl));
1649 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl))
1650 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl));
1658 /* Automatically handles default parameters. */
1659 tree oldtype = TREE_TYPE (olddecl);
1662 /* Merge the data types specified in the two decls. */
1663 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1665 /* If merge_types produces a non-typedef type, just use the old type. */
1666 if (TREE_CODE (newdecl) == TYPE_DECL
1667 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1670 if (TREE_CODE (newdecl) == VAR_DECL)
1672 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1673 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1674 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1675 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1678 /* Do this after calling `merge_types' so that default
1679 parameters don't confuse us. */
1680 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1681 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
1682 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
1684 TREE_TYPE (newdecl) = build_exception_variant (newtype,
1685 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
1686 TREE_TYPE (olddecl) = build_exception_variant (newtype,
1687 TYPE_RAISES_EXCEPTIONS (oldtype));
1689 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
1690 && ! DECL_IS_BUILTIN (olddecl)
1692 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
1693 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
1695 error ("declaration of `%F' throws different exceptions",
1697 cp_error_at ("than previous declaration `%F'", olddecl);
1700 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1702 /* Lay the type out, unless already done. */
1703 if (! same_type_p (newtype, oldtype)
1704 && TREE_TYPE (newdecl) != error_mark_node
1705 && !(processing_template_decl && uses_template_parms (newdecl)))
1706 layout_type (TREE_TYPE (newdecl));
1708 if ((TREE_CODE (newdecl) == VAR_DECL
1709 || TREE_CODE (newdecl) == PARM_DECL
1710 || TREE_CODE (newdecl) == RESULT_DECL
1711 || TREE_CODE (newdecl) == FIELD_DECL
1712 || TREE_CODE (newdecl) == TYPE_DECL)
1713 && !(processing_template_decl && uses_template_parms (newdecl)))
1714 layout_decl (newdecl, 0);
1716 /* Merge the type qualifiers. */
1717 if (TREE_READONLY (newdecl))
1718 TREE_READONLY (olddecl) = 1;
1719 if (TREE_THIS_VOLATILE (newdecl))
1720 TREE_THIS_VOLATILE (olddecl) = 1;
1722 /* Merge the initialization information. */
1723 if (DECL_INITIAL (newdecl) == NULL_TREE
1724 && DECL_INITIAL (olddecl) != NULL_TREE)
1726 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1727 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1728 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1729 && DECL_LANG_SPECIFIC (newdecl)
1730 && DECL_LANG_SPECIFIC (olddecl))
1732 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1733 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1737 /* Merge the section attribute.
1738 We want to issue an error if the sections conflict but that must be
1739 done later in decl_attributes since we are called before attributes
1741 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1742 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1744 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1746 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1747 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1748 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1749 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1750 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1751 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1752 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1753 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1754 /* Keep the old RTL. */
1755 COPY_DECL_RTL (olddecl, newdecl);
1757 else if (TREE_CODE (newdecl) == VAR_DECL
1758 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1760 /* Keep the old RTL. We cannot keep the old RTL if the old
1761 declaration was for an incomplete object and the new
1762 declaration is not since many attributes of the RTL will
1764 COPY_DECL_RTL (olddecl, newdecl);
1767 /* If cannot merge, then use the new type and qualifiers,
1768 and don't preserve the old rtl. */
1771 /* Clean out any memory we had of the old declaration. */
1772 tree oldstatic = value_member (olddecl, static_aggregates);
1774 TREE_VALUE (oldstatic) = error_mark_node;
1776 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1777 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1778 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1779 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1782 /* Merge the storage class information. */
1783 merge_weak (newdecl, olddecl);
1785 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1786 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1787 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1788 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1789 if (! DECL_EXTERNAL (olddecl))
1790 DECL_EXTERNAL (newdecl) = 0;
1792 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1794 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1795 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1796 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1797 DECL_TEMPLATE_INSTANTIATED (newdecl)
1798 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1799 /* Don't really know how much of the language-specific
1800 values we should copy from old to new. */
1801 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1802 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1803 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1804 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1805 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1806 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1807 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1808 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1809 olddecl_friend = DECL_FRIEND_P (olddecl);
1811 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1812 if (TREE_CODE (newdecl) == FUNCTION_DECL
1813 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1815 DECL_BEFRIENDING_CLASSES (newdecl)
1816 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1817 DECL_BEFRIENDING_CLASSES (olddecl));
1818 /* DECL_THUNKS is only valid for virtual functions,
1819 otherwise it is a DECL_FRIEND_CONTEXT. */
1820 if (DECL_VIRTUAL_P (newdecl))
1821 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1825 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1827 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1828 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1830 /* If newdecl is not a specialization, then it is not a
1831 template-related function at all. And that means that we
1832 should have exited above, returning 0. */
1833 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1835 if (TREE_USED (olddecl))
1836 /* From [temp.expl.spec]:
1838 If a template, a member template or the member of a class
1839 template is explicitly specialized then that
1840 specialization shall be declared before the first use of
1841 that specialization that would cause an implicit
1842 instantiation to take place, in every translation unit in
1843 which such a use occurs. */
1844 error ("explicit specialization of %D after first use",
1847 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1849 /* [temp.expl.spec/14] We don't inline explicit specialization
1850 just because the primary template says so. */
1854 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1855 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1857 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1859 /* If either decl says `inline', this fn is inline, unless
1860 its definition was passed already. */
1861 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1862 DECL_INLINE (olddecl) = 1;
1863 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1865 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1866 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1869 /* Preserve abstractness on cloned [cd]tors. */
1870 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1874 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1875 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1876 COPY_DECL_RTL (newdecl, olddecl);
1878 if (! types_match || new_defines_function)
1880 /* These need to be copied so that the names are available.
1881 Note that if the types do match, we'll preserve inline
1882 info and other bits, but if not, we won't. */
1883 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1884 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1886 if (new_defines_function)
1887 /* If defining a function declared with other language
1888 linkage, use the previously declared language linkage. */
1889 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1890 else if (types_match)
1892 /* If redeclaring a builtin function, and not a definition,
1893 it stays built in. */
1894 if (DECL_BUILT_IN (olddecl))
1896 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1897 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1898 /* If we're keeping the built-in definition, keep the rtl,
1899 regardless of declaration matches. */
1900 COPY_DECL_RTL (olddecl, newdecl);
1903 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1904 /* Don't clear out the arguments if we're redefining a function. */
1905 if (DECL_ARGUMENTS (olddecl))
1906 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1909 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1910 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1912 /* Now preserve various other info from the definition. */
1913 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1914 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1915 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1916 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1918 /* Warn about conflicting visibility specifications. */
1919 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1920 && DECL_VISIBILITY_SPECIFIED (newdecl)
1921 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1923 warning ("%J'%D': visibility attribute ignored because it",
1925 warning ("%Jconflicts with previous declaration here", olddecl);
1927 /* Choose the declaration which specified visibility. */
1928 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1930 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1931 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1934 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1938 function_size = sizeof (struct tree_decl);
1940 memcpy ((char *) olddecl + sizeof (struct tree_common),
1941 (char *) newdecl + sizeof (struct tree_common),
1942 function_size - sizeof (struct tree_common));
1944 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
1945 /* If newdecl is a template instantiation, it is possible that
1946 the following sequence of events has occurred:
1948 o A friend function was declared in a class template. The
1949 class template was instantiated.
1951 o The instantiation of the friend declaration was
1952 recorded on the instantiation list, and is newdecl.
1954 o Later, however, instantiate_class_template called pushdecl
1955 on the newdecl to perform name injection. But, pushdecl in
1956 turn called duplicate_decls when it discovered that another
1957 declaration of a global function with the same name already
1960 o Here, in duplicate_decls, we decided to clobber newdecl.
1962 If we're going to do that, we'd better make sure that
1963 olddecl, and not newdecl, is on the list of
1964 instantiations so that if we try to do the instantiation
1965 again we won't get the clobbered declaration. */
1966 reregister_specialization (newdecl,
1967 DECL_TI_TEMPLATE (newdecl),
1972 memcpy ((char *) olddecl + sizeof (struct tree_common),
1973 (char *) newdecl + sizeof (struct tree_common),
1974 sizeof (struct tree_decl) - sizeof (struct tree_common)
1975 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
1978 DECL_UID (olddecl) = olddecl_uid;
1980 DECL_FRIEND_P (olddecl) = 1;
1982 /* NEWDECL contains the merged attribute lists.
1983 Update OLDDECL to be the same. */
1984 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
1986 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
1987 so that encode_section_info has a chance to look at the new decl
1988 flags and attributes. */
1989 if (DECL_RTL_SET_P (olddecl)
1990 && (TREE_CODE (olddecl) == FUNCTION_DECL
1991 || (TREE_CODE (olddecl) == VAR_DECL
1992 && TREE_STATIC (olddecl))))
1993 make_decl_rtl (olddecl);
1998 /* Return zero if the declaration NEWDECL is valid
1999 when the declaration OLDDECL (assumed to be for the same name)
2000 has already been seen.
2001 Otherwise return an error message format string with a %s
2002 where the identifier should go. */
2005 redeclaration_error_message (tree newdecl, tree olddecl)
2007 if (TREE_CODE (newdecl) == TYPE_DECL)
2009 /* Because C++ can put things into name space for free,
2010 constructs like "typedef struct foo { ... } foo"
2011 would look like an erroneous redeclaration. */
2012 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2015 return "redefinition of `%#D'";
2017 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2019 /* If this is a pure function, its olddecl will actually be
2020 the original initialization to `0' (which we force to call
2021 abort()). Don't complain about redefinition in this case. */
2022 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl))
2025 /* If both functions come from different namespaces, this is not
2026 a redeclaration - this is a conflict with a used function. */
2027 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2028 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
2029 return "`%D' conflicts with used function";
2031 /* We'll complain about linkage mismatches in
2032 warn_extern_redeclared_static. */
2034 /* Defining the same name twice is no good. */
2035 if (DECL_INITIAL (olddecl) != NULL_TREE
2036 && DECL_INITIAL (newdecl) != NULL_TREE)
2038 if (DECL_NAME (olddecl) == NULL_TREE)
2039 return "`%#D' not declared in class";
2041 return "redefinition of `%#D'";
2045 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2049 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2051 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2052 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2053 return "redefinition of `%#D'";
2057 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2058 || (DECL_TEMPLATE_RESULT (newdecl)
2059 == DECL_TEMPLATE_RESULT (olddecl)))
2062 nt = DECL_TEMPLATE_RESULT (newdecl);
2063 if (DECL_TEMPLATE_INFO (nt))
2064 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2065 ot = DECL_TEMPLATE_RESULT (olddecl);
2066 if (DECL_TEMPLATE_INFO (ot))
2067 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2068 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2069 return "redefinition of `%#D'";
2073 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2075 /* Objects declared at top level: */
2076 /* If at least one is a reference, it's ok. */
2077 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2079 /* Reject two definitions. */
2080 return "redefinition of `%#D'";
2084 /* Objects declared with block scope: */
2085 /* Reject two definitions, and reject a definition
2086 together with an external reference. */
2087 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2088 return "redeclaration of `%#D'";
2093 /* Create a new label, named ID. */
2096 make_label_decl (tree id, int local_p)
2100 decl = build_decl (LABEL_DECL, id, void_type_node);
2102 DECL_CONTEXT (decl) = current_function_decl;
2103 DECL_MODE (decl) = VOIDmode;
2104 C_DECLARED_LABEL_FLAG (decl) = local_p;
2106 /* Say where one reference is to the label, for the sake of the
2107 error if it is not defined. */
2108 DECL_SOURCE_LOCATION (decl) = input_location;
2110 /* Record the fact that this identifier is bound to this label. */
2111 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2116 /* Record this label on the list of used labels so that we can check
2117 at the end of the function to see whether or not the label was
2118 actually defined, and so we can check when the label is defined whether
2119 this use is valid. */
2122 use_label (tree decl)
2124 if (named_label_uses == NULL
2125 || named_label_uses->names_in_scope != current_binding_level->names
2126 || named_label_uses->label_decl != decl)
2128 struct named_label_use_list *new_ent;
2129 new_ent = GGC_NEW (struct named_label_use_list);
2130 new_ent->label_decl = decl;
2131 new_ent->names_in_scope = current_binding_level->names;
2132 new_ent->binding_level = current_binding_level;
2133 new_ent->o_goto_locus = input_location;
2134 new_ent->next = named_label_uses;
2135 named_label_uses = new_ent;
2139 /* Look for a label named ID in the current function. If one cannot
2140 be found, create one. (We keep track of used, but undefined,
2141 labels, and complain about them at the end of a function.) */
2144 lookup_label (tree id)
2147 struct named_label_list *ent;
2149 timevar_push (TV_NAME_LOOKUP);
2150 /* You can't use labels at global scope. */
2151 if (current_function_decl == NULL_TREE)
2153 error ("label `%E' referenced outside of any function", id);
2154 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2157 /* See if we've already got this label. */
2158 decl = IDENTIFIER_LABEL_VALUE (id);
2159 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2160 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2162 /* Record this label on the list of labels used in this function.
2163 We do this before calling make_label_decl so that we get the
2164 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2165 ent = GGC_CNEW (struct named_label_list);
2166 ent->old_value = IDENTIFIER_LABEL_VALUE (id);
2167 ent->next = named_labels;
2170 /* We need a new label. */
2171 decl = make_label_decl (id, /*local_p=*/0);
2173 /* Now fill in the information we didn't have before. */
2174 ent->label_decl = decl;
2176 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2179 /* Declare a local label named ID. */
2182 declare_local_label (tree id)
2186 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2187 this scope we can restore the old value of
2188 IDENTIFIER_TYPE_VALUE. */
2189 current_binding_level->shadowed_labels
2190 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2191 current_binding_level->shadowed_labels);
2192 /* Look for the label. */
2193 decl = make_label_decl (id, /*local_p=*/1);
2194 /* Now fill in the information we didn't have before. */
2195 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
2200 /* Returns nonzero if it is ill-formed to jump past the declaration of
2201 DECL. Returns 2 if it's also a real problem. */
2204 decl_jump_unsafe (tree decl)
2206 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))
2209 if (DECL_INITIAL (decl) == NULL_TREE
2210 && pod_type_p (TREE_TYPE (decl)))
2213 /* This is really only important if we're crossing an initialization.
2214 The POD stuff is just pedantry; why should it matter if the class
2215 contains a field of pointer to member type? */
2216 if (DECL_INITIAL (decl)
2217 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))))
2222 /* Check that a single previously seen jump to a newly defined label
2223 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2224 the jump context; NAMES are the names in scope in LEVEL at the jump
2225 context; FILE and LINE are the source position of the jump or 0. */
2228 check_previous_goto_1 (tree decl,
2229 struct cp_binding_level* level,
2230 tree names, const location_t *locus)
2234 struct cp_binding_level *b = current_binding_level;
2235 for (; b; b = b->level_chain)
2237 tree new_decls = b->names;
2238 tree old_decls = (b == level ? names : NULL_TREE);
2239 for (; new_decls != old_decls;
2240 new_decls = TREE_CHAIN (new_decls))
2242 int problem = decl_jump_unsafe (new_decls);
2249 pedwarn ("jump to label `%D'", decl);
2251 pedwarn ("jump to case label");
2254 pedwarn ("%H from here", locus);
2259 cp_error_at (" crosses initialization of `%#D'",
2262 cp_pedwarn_at (" enters scope of non-POD `%#D'",
2268 if ((b->kind == sk_try || b->kind == sk_catch) && ! saw_eh)
2273 pedwarn ("jump to label `%D'", decl);
2275 pedwarn ("jump to case label");
2278 pedwarn ("%H from here", locus);
2281 if (b->kind == sk_try)
2282 error (" enters try block");
2284 error (" enters catch block");
2291 check_previous_goto (struct named_label_use_list* use)
2293 check_previous_goto_1 (use->label_decl, use->binding_level,
2294 use->names_in_scope, &use->o_goto_locus);
2298 check_switch_goto (struct cp_binding_level* level)
2300 check_previous_goto_1 (NULL_TREE, level, level->names, NULL);
2303 /* Check that any previously seen jumps to a newly defined label DECL
2304 are OK. Called by define_label. */
2307 check_previous_gotos (tree decl)
2309 struct named_label_use_list **usep;
2311 if (! TREE_USED (decl))
2314 for (usep = &named_label_uses; *usep; )
2316 struct named_label_use_list *use = *usep;
2317 if (use->label_decl == decl)
2319 check_previous_goto (use);
2323 usep = &(use->next);
2327 /* Check that a new jump to a label DECL is OK. Called by
2328 finish_goto_stmt. */
2331 check_goto (tree decl)
2335 struct named_label_list *lab;
2337 /* We can't know where a computed goto is jumping. So we assume
2339 if (! DECL_P (decl))
2342 /* If the label hasn't been defined yet, defer checking. */
2343 if (! DECL_INITIAL (decl))
2349 for (lab = named_labels; lab; lab = lab->next)
2350 if (decl == lab->label_decl)
2353 /* If the label is not on named_labels it's a gcc local label, so
2354 it must be in an outer scope, so jumping to it is always OK. */
2358 if ((lab->in_try_scope || lab->in_catch_scope || lab->bad_decls)
2361 cp_pedwarn_at ("jump to label `%D'", decl);
2362 pedwarn (" from here");
2366 for (bad = lab->bad_decls; bad; bad = TREE_CHAIN (bad))
2368 tree b = TREE_VALUE (bad);
2369 int u = decl_jump_unsafe (b);
2371 if (u > 1 && DECL_ARTIFICIAL (b))
2372 /* Can't skip init of __exception_info. */
2373 error ("%J enters catch block", b);
2375 cp_error_at (" skips initialization of `%#D'", b);
2377 cp_pedwarn_at (" enters scope of non-POD `%#D'", b);
2380 if (lab->in_try_scope)
2381 error (" enters try block");
2382 else if (lab->in_catch_scope)
2383 error (" enters catch block");
2386 /* Define a label, specifying the location in the source file.
2387 Return the LABEL_DECL node for the label. */
2390 define_label (location_t location, tree name)
2392 tree decl = lookup_label (name);
2393 struct named_label_list *ent;
2394 struct cp_binding_level *p;
2396 timevar_push (TV_NAME_LOOKUP);
2397 for (ent = named_labels; ent; ent = ent->next)
2398 if (ent->label_decl == decl)
2401 /* After labels, make any new cleanups in the function go into their
2402 own new (temporary) binding contour. */
2403 for (p = current_binding_level;
2404 p->kind != sk_function_parms;
2406 p->more_cleanups_ok = 0;
2408 if (name == get_identifier ("wchar_t"))
2409 pedwarn ("label named wchar_t");
2411 if (DECL_INITIAL (decl) != NULL_TREE)
2412 error ("duplicate label `%D'", decl);
2415 /* Mark label as having been defined. */
2416 DECL_INITIAL (decl) = error_mark_node;
2417 /* Say where in the source. */
2418 DECL_SOURCE_LOCATION (decl) = location;
2421 ent->names_in_scope = current_binding_level->names;
2422 ent->binding_level = current_binding_level;
2424 check_previous_gotos (decl);
2427 timevar_pop (TV_NAME_LOOKUP);
2433 struct cp_binding_level *level;
2434 struct cp_switch *next;
2435 /* The SWITCH_STMT being built. */
2437 /* A splay-tree mapping the low element of a case range to the high
2438 element, or NULL_TREE if there is no high element. Used to
2439 determine whether or not a new case label duplicates an old case
2440 label. We need a tree, rather than simply a hash table, because
2441 of the GNU case range extension. */
2445 /* A stack of the currently active switch statements. The innermost
2446 switch statement is on the top of the stack. There is no need to
2447 mark the stack for garbage collection because it is only active
2448 during the processing of the body of a function, and we never
2449 collect at that point. */
2451 static struct cp_switch *switch_stack;
2453 /* Called right after a switch-statement condition is parsed.
2454 SWITCH_STMT is the switch statement being parsed. */
2457 push_switch (tree switch_stmt)
2459 struct cp_switch *p = xmalloc (sizeof (struct cp_switch));
2460 p->level = current_binding_level;
2461 p->next = switch_stack;
2462 p->switch_stmt = switch_stmt;
2463 p->cases = splay_tree_new (case_compare, NULL, NULL);
2470 struct cp_switch *cs = switch_stack;
2472 /* Emit warnings as needed. */
2473 c_do_switch_warnings (cs->cases, cs->switch_stmt);
2475 splay_tree_delete (cs->cases);
2476 switch_stack = switch_stack->next;
2480 /* Note that we've seen a definition of a case label, and complain if this
2481 is a bad place for one. */
2484 finish_case_label (tree low_value, tree high_value)
2487 struct cp_binding_level *p;
2489 if (processing_template_decl)
2493 /* For templates, just add the case label; we'll do semantic
2494 analysis at instantiation-time. */
2495 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2496 return add_stmt (build_case_label (low_value, high_value, label));
2499 /* Find the condition on which this switch statement depends. */
2500 cond = SWITCH_COND (switch_stack->switch_stmt);
2501 if (cond && TREE_CODE (cond) == TREE_LIST)
2502 cond = TREE_VALUE (cond);
2504 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2505 low_value, high_value);
2507 check_switch_goto (switch_stack->level);
2509 /* After labels, make any new cleanups in the function go into their
2510 own new (temporary) binding contour. */
2511 for (p = current_binding_level;
2512 p->kind != sk_function_parms;
2514 p->more_cleanups_ok = 0;
2519 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2522 typename_hash (const void* k)
2527 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2528 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2533 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2536 typename_compare (const void * k1, const void * k2)
2545 d1 = TYPE_NAME (t1);
2546 d2 = TYPE_NAME (t2);
2548 return (DECL_NAME (d1) == DECL_NAME (d2)
2549 && TYPE_CONTEXT (t1) == TYPE_CONTEXT (t2)
2550 && ((TREE_TYPE (t1) != NULL_TREE)
2551 == (TREE_TYPE (t2) != NULL_TREE))
2552 && same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))
2553 && TYPENAME_TYPE_FULLNAME (t1) == TYPENAME_TYPE_FULLNAME (t2));
2556 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2557 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
2558 is non-NULL, this type is being created by the implicit typename
2559 extension, and BASE_TYPE is a type named `t' in some base class of
2560 `T' which depends on template parameters.
2562 Returns the new TYPENAME_TYPE. */
2564 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2567 build_typename_type (tree context, tree name, tree fullname)
2573 if (typename_htab == NULL)
2575 typename_htab = htab_create_ggc (61, &typename_hash,
2576 &typename_compare, NULL);
2579 /* Build the TYPENAME_TYPE. */
2580 t = make_aggr_type (TYPENAME_TYPE);
2581 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2582 TYPENAME_TYPE_FULLNAME (t) = fullname;
2584 /* Build the corresponding TYPE_DECL. */
2585 d = build_decl (TYPE_DECL, name, t);
2586 TYPE_NAME (TREE_TYPE (d)) = d;
2587 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2588 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2589 DECL_ARTIFICIAL (d) = 1;
2591 /* See if we already have this type. */
2592 e = htab_find_slot (typename_htab, t, INSERT);
2601 /* Resolve `typename CONTEXT::NAME'. Returns an appropriate type,
2602 unless an error occurs, in which case error_mark_node is returned.
2603 If we locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is
2604 set, we return that, rather than the _TYPE it corresponds to, in
2605 other cases we look through the type decl. If TF_ERROR is set,
2606 complain about errors, otherwise be quiet. */
2609 make_typename_type (tree context, tree name, tsubst_flags_t complain)
2613 if (name == error_mark_node
2614 || context == NULL_TREE
2615 || context == error_mark_node)
2616 return error_mark_node;
2620 if (!(TYPE_LANG_SPECIFIC (name)
2621 && (CLASSTYPE_IS_TEMPLATE (name)
2622 || CLASSTYPE_USE_TEMPLATE (name))))
2623 name = TYPE_IDENTIFIER (name);
2625 /* Create a TEMPLATE_ID_EXPR for the type. */
2626 name = build_nt (TEMPLATE_ID_EXPR,
2627 CLASSTYPE_TI_TEMPLATE (name),
2628 CLASSTYPE_TI_ARGS (name));
2630 else if (TREE_CODE (name) == TYPE_DECL)
2631 name = DECL_NAME (name);
2635 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2637 name = TREE_OPERAND (name, 0);
2638 if (TREE_CODE (name) == TEMPLATE_DECL)
2639 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2641 if (TREE_CODE (name) == TEMPLATE_DECL)
2643 error ("`%D' used without template parameters", name);
2644 return error_mark_node;
2646 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2648 if (TREE_CODE (context) == NAMESPACE_DECL)
2650 /* We can get here from typename_sub0 in the explicit_template_type
2651 expansion. Just fail. */
2652 if (complain & tf_error)
2653 error ("no class template named `%#T' in `%#T'",
2655 return error_mark_node;
2658 if (!dependent_type_p (context)
2659 || currently_open_class (context))
2661 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2663 tree tmpl = NULL_TREE;
2664 if (IS_AGGR_TYPE (context))
2665 tmpl = lookup_field (context, name, 0, false);
2666 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2668 if (complain & tf_error)
2669 error ("no class template named `%#T' in `%#T'",
2671 return error_mark_node;
2674 if (complain & tf_error)
2675 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2677 return lookup_template_class (tmpl,
2678 TREE_OPERAND (fullname, 1),
2680 /*entering_scope=*/0,
2681 tf_error | tf_warning | tf_user);
2687 if (!IS_AGGR_TYPE (context))
2689 if (complain & tf_error)
2690 error ("no type named `%#T' in `%#T'", name, context);
2691 return error_mark_node;
2694 t = lookup_field (context, name, 0, true);
2697 if (TREE_CODE (t) != TYPE_DECL)
2699 if (complain & tf_error)
2700 error ("no type named `%#T' in `%#T'", name, context);
2701 return error_mark_node;
2704 if (complain & tf_error)
2705 perform_or_defer_access_check (TYPE_BINFO (context), t);
2707 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2715 /* If the CONTEXT is not a template type, then either the field is
2716 there now or its never going to be. */
2717 if (!dependent_type_p (context))
2719 if (complain & tf_error)
2720 error ("no type named `%#T' in `%#T'", name, context);
2721 return error_mark_node;
2724 return build_typename_type (context, name, fullname);
2727 /* Resolve `CONTEXT::template NAME'. Returns an appropriate type,
2728 unless an error occurs, in which case error_mark_node is returned.
2729 If we locate a TYPE_DECL, we return that, rather than the _TYPE it
2730 corresponds to. If COMPLAIN zero, don't complain about any errors
2734 make_unbound_class_template (tree context, tree name, tsubst_flags_t complain)
2740 name = TYPE_IDENTIFIER (name);
2741 else if (DECL_P (name))
2742 name = DECL_NAME (name);
2743 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2745 if (!dependent_type_p (context)
2746 || currently_open_class (context))
2748 tree tmpl = NULL_TREE;
2750 if (IS_AGGR_TYPE (context))
2751 tmpl = lookup_field (context, name, 0, false);
2753 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2755 if (complain & tf_error)
2756 error ("no class template named `%#T' in `%#T'", name, context);
2757 return error_mark_node;
2760 if (complain & tf_error)
2761 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2766 /* Build the UNBOUND_CLASS_TEMPLATE. */
2767 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2768 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2769 TREE_TYPE (t) = NULL_TREE;
2771 /* Build the corresponding TEMPLATE_DECL. */
2772 d = build_decl (TEMPLATE_DECL, name, t);
2773 TYPE_NAME (TREE_TYPE (d)) = d;
2774 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2775 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2776 DECL_ARTIFICIAL (d) = 1;
2783 /* Push the declarations of builtin types into the namespace.
2784 RID_INDEX is the index of the builtin type in the array
2785 RID_POINTERS. NAME is the name used when looking up the builtin
2786 type. TYPE is the _TYPE node for the builtin type. */
2789 record_builtin_type (enum rid rid_index,
2793 tree rname = NULL_TREE, tname = NULL_TREE;
2794 tree tdecl = NULL_TREE;
2796 if ((int) rid_index < (int) RID_MAX)
2797 rname = ridpointers[(int) rid_index];
2799 tname = get_identifier (name);
2801 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2802 eliminated. Built-in types should not be looked up name; their
2803 names are keywords that the parser can recognize. However, there
2804 is code in c-common.c that uses identifier_global_value to look
2805 up built-in types by name. */
2808 tdecl = build_decl (TYPE_DECL, tname, type);
2809 DECL_ARTIFICIAL (tdecl) = 1;
2810 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2816 tdecl = build_decl (TYPE_DECL, rname, type);
2817 DECL_ARTIFICIAL (tdecl) = 1;
2819 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2822 if (!TYPE_NAME (type))
2823 TYPE_NAME (type) = tdecl;
2826 debug_hooks->type_decl (tdecl, 0);
2829 /* Record one of the standard Java types.
2830 * Declare it as having the given NAME.
2831 * If SIZE > 0, it is the size of one of the integral types;
2832 * otherwise it is the negative of the size of one of the other types. */
2835 record_builtin_java_type (const char* name, int size)
2839 type = make_signed_type (size);
2840 else if (size > -32)
2841 { /* "__java_char" or ""__java_boolean". */
2842 type = make_unsigned_type (-size);
2843 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2846 { /* "__java_float" or ""__java_double". */
2847 type = make_node (REAL_TYPE);
2848 TYPE_PRECISION (type) = - size;
2851 record_builtin_type (RID_MAX, name, type);
2852 decl = TYPE_NAME (type);
2854 /* Suppress generate debug symbol entries for these types,
2855 since for normal C++ they are just clutter.
2856 However, push_lang_context undoes this if extern "Java" is seen. */
2857 DECL_IGNORED_P (decl) = 1;
2859 TYPE_FOR_JAVA (type) = 1;
2863 /* Push a type into the namespace so that the back-ends ignore it. */
2866 record_unknown_type (tree type, const char* name)
2868 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
2869 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2870 DECL_IGNORED_P (decl) = 1;
2871 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
2872 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
2873 TYPE_ALIGN (type) = 1;
2874 TYPE_USER_ALIGN (type) = 0;
2875 TYPE_MODE (type) = TYPE_MODE (void_type_node);
2878 /* An string for which we should create an IDENTIFIER_NODE at
2881 typedef struct predefined_identifier
2883 /* The name of the identifier. */
2884 const char *const name;
2885 /* The place where the IDENTIFIER_NODE should be stored. */
2887 /* Nonzero if this is the name of a constructor or destructor. */
2888 const int ctor_or_dtor_p;
2889 } predefined_identifier;
2891 /* Create all the predefined identifiers. */
2894 initialize_predefined_identifiers (void)
2896 const predefined_identifier *pid;
2898 /* A table of identifiers to create at startup. */
2899 static const predefined_identifier predefined_identifiers[] = {
2900 { "C++", &lang_name_cplusplus, 0 },
2901 { "C", &lang_name_c, 0 },
2902 { "Java", &lang_name_java, 0 },
2903 { CTOR_NAME, &ctor_identifier, 1 },
2904 { "__base_ctor", &base_ctor_identifier, 1 },
2905 { "__comp_ctor", &complete_ctor_identifier, 1 },
2906 { DTOR_NAME, &dtor_identifier, 1 },
2907 { "__comp_dtor", &complete_dtor_identifier, 1 },
2908 { "__base_dtor", &base_dtor_identifier, 1 },
2909 { "__deleting_dtor", &deleting_dtor_identifier, 1 },
2910 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
2911 { "nelts", &nelts_identifier, 0 },
2912 { THIS_NAME, &this_identifier, 0 },
2913 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
2914 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
2915 { "_vptr", &vptr_identifier, 0 },
2916 { "__vtt_parm", &vtt_parm_identifier, 0 },
2917 { "::", &global_scope_name, 0 },
2918 { "std", &std_identifier, 0 },
2922 for (pid = predefined_identifiers; pid->name; ++pid)
2924 *pid->node = get_identifier (pid->name);
2925 if (pid->ctor_or_dtor_p)
2926 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
2930 /* Create the predefined scalar types of C,
2931 and some nodes representing standard constants (0, 1, (void *)0).
2932 Initialize the global binding level.
2933 Make definitions for built-in primitive functions. */
2936 cxx_init_decl_processing (void)
2939 tree void_ftype_ptr;
2941 build_common_tree_nodes (flag_signed_char, false);
2943 /* Create all the identifiers we need. */
2944 initialize_predefined_identifiers ();
2946 /* Create the global variables. */
2947 push_to_top_level ();
2949 current_function_decl = NULL_TREE;
2950 current_binding_level = NULL;
2951 /* Enter the global namespace. */
2952 gcc_assert (global_namespace == NULL_TREE);
2953 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
2955 begin_scope (sk_namespace, global_namespace);
2957 current_lang_name = NULL_TREE;
2959 /* Adjust various flags based on command-line settings. */
2960 if (!flag_permissive)
2961 flag_pedantic_errors = 1;
2962 if (!flag_no_inline)
2964 flag_inline_trees = 1;
2967 if (flag_inline_functions)
2969 flag_inline_trees = 2;
2970 flag_inline_functions = 0;
2973 /* Force minimum function alignment if using the least significant
2974 bit of function pointers to store the virtual bit. */
2975 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
2976 && force_align_functions_log < 1)
2977 force_align_functions_log = 1;
2980 current_lang_name = lang_name_c;
2982 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
2983 TREE_TYPE (error_mark_list) = error_mark_node;
2985 /* Create the `std' namespace. */
2986 push_namespace (std_identifier);
2987 std_node = current_namespace;
2990 c_common_nodes_and_builtins ();
2992 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
2993 java_short_type_node = record_builtin_java_type ("__java_short", 16);
2994 java_int_type_node = record_builtin_java_type ("__java_int", 32);
2995 java_long_type_node = record_builtin_java_type ("__java_long", 64);
2996 java_float_type_node = record_builtin_java_type ("__java_float", -32);
2997 java_double_type_node = record_builtin_java_type ("__java_double", -64);
2998 java_char_type_node = record_builtin_java_type ("__java_char", -16);
2999 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3001 integer_two_node = build_int_cst (NULL_TREE, 2);
3002 integer_three_node = build_int_cst (NULL_TREE, 3);
3004 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3005 truthvalue_type_node = boolean_type_node;
3006 truthvalue_false_node = boolean_false_node;
3007 truthvalue_true_node = boolean_true_node;
3009 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3012 record_builtin_type (RID_MAX, NULL, string_type_node);
3015 delta_type_node = ptrdiff_type_node;
3016 vtable_index_type = ptrdiff_type_node;
3018 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3019 void_ftype = build_function_type (void_type_node, void_list_node);
3020 void_ftype_ptr = build_function_type (void_type_node,
3021 tree_cons (NULL_TREE,
3025 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3027 /* C++ extensions */
3029 unknown_type_node = make_node (UNKNOWN_TYPE);
3030 record_unknown_type (unknown_type_node, "unknown type");
3032 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3033 TREE_TYPE (unknown_type_node) = unknown_type_node;
3035 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3037 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3038 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3041 /* Make sure we get a unique function type, so we can give
3042 its pointer type a name. (This wins for gdb.) */
3043 tree vfunc_type = make_node (FUNCTION_TYPE);
3044 TREE_TYPE (vfunc_type) = integer_type_node;
3045 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3046 layout_type (vfunc_type);
3048 vtable_entry_type = build_pointer_type (vfunc_type);
3050 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3053 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3054 layout_type (vtbl_type_node);
3055 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3056 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3057 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3058 layout_type (vtbl_ptr_type_node);
3059 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3061 push_namespace (get_identifier ("__cxxabiv1"));
3062 abi_node = current_namespace;
3065 global_type_node = make_node (LANG_TYPE);
3066 record_unknown_type (global_type_node, "global type");
3069 current_lang_name = lang_name_cplusplus;
3073 tree bad_alloc_type_node;
3074 tree bad_alloc_decl;
3075 tree newtype, deltype;
3076 tree ptr_ftype_sizetype;
3078 push_namespace (std_identifier);
3079 bad_alloc_id = get_identifier ("bad_alloc");
3080 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3081 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3083 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3084 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3085 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3089 = build_function_type (ptr_type_node,
3090 tree_cons (NULL_TREE,
3093 newtype = build_exception_variant
3094 (ptr_ftype_sizetype, add_exception_specifier
3095 (NULL_TREE, bad_alloc_type_node, -1));
3096 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3097 push_cp_library_fn (NEW_EXPR, newtype);
3098 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3099 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3100 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3104 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3106 /* Perform other language dependent initializations. */
3107 init_class_processing ();
3108 init_rtti_processing ();
3110 if (flag_exceptions)
3111 init_exception_processing ();
3113 if (! supports_one_only ())
3116 make_fname_decl = cp_make_fname_decl;
3117 start_fname_decls ();
3119 /* Show we use EH for cleanups. */
3120 if (flag_exceptions)
3121 using_eh_for_cleanups ();
3124 /* Generate an initializer for a function naming variable from
3125 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3126 filled in with the type of the init. */
3129 cp_fname_init (const char* name, tree *type_p)
3131 tree domain = NULL_TREE;
3133 tree init = NULL_TREE;
3138 length = strlen (name);
3139 domain = build_index_type (size_int (length));
3140 init = build_string (length + 1, name);
3143 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3144 type = build_cplus_array_type (type, domain);
3149 TREE_TYPE (init) = type;
3151 init = error_mark_node;
3156 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3157 decl, NAME is the initialization string and TYPE_DEP indicates whether
3158 NAME depended on the type of the function. We make use of that to detect
3159 __PRETTY_FUNCTION__ inside a template fn. This is being done
3160 lazily at the point of first use, so we mustn't push the decl now. */
3163 cp_make_fname_decl (tree id, int type_dep)
3165 const char *const name = (type_dep && processing_template_decl
3166 ? NULL : fname_as_string (type_dep));
3168 tree init = cp_fname_init (name, &type);
3169 tree decl = build_decl (VAR_DECL, id, type);
3172 free ((char *) name);
3174 /* As we're using pushdecl_with_scope, we must set the context. */
3175 DECL_CONTEXT (decl) = current_function_decl;
3176 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3178 TREE_STATIC (decl) = 1;
3179 TREE_READONLY (decl) = 1;
3180 DECL_ARTIFICIAL (decl) = 1;
3181 DECL_INITIAL (decl) = init;
3183 TREE_USED (decl) = 1;
3185 if (current_function_decl)
3187 struct cp_binding_level *b = current_binding_level;
3188 while (b->level_chain->kind != sk_function_parms)
3190 pushdecl_with_scope (decl, b);
3191 cp_finish_decl (decl, init, NULL_TREE, LOOKUP_ONLYCONVERTING);
3194 pushdecl_top_level_and_finish (decl, init);
3199 /* Make a definition for a builtin function named NAME in the current
3200 namespace, whose data type is TYPE and whose context is CONTEXT.
3201 TYPE should be a function type with argument types.
3203 CLASS and CODE tell later passes how to compile calls to this function.
3204 See tree.h for possible values.
3206 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3207 the name to be called if we can't opencode the function.
3208 If ATTRS is nonzero, use that for the function's attribute
3212 builtin_function_1 (const char* name,
3215 enum built_in_function code,
3216 enum built_in_class class,
3217 const char* libname,
3220 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3221 DECL_BUILT_IN_CLASS (decl) = class;
3222 DECL_FUNCTION_CODE (decl) = code;
3223 DECL_CONTEXT (decl) = context;
3227 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3228 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3229 function in the namespace. */
3231 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3233 /* Warn if a function in the namespace for users
3234 is used without an occasion to consider it declared. */
3235 if (name[0] != '_' || name[1] != '_')
3236 DECL_ANTICIPATED (decl) = 1;
3238 /* Possibly apply some default attributes to this built-in function. */
3240 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3242 decl_attributes (&decl, NULL_TREE, 0);
3247 /* Entry point for the benefit of c_common_nodes_and_builtins.
3249 Make a definition for a builtin function named NAME and whose data type
3250 is TYPE. TYPE should be a function type with argument types. This
3251 function places the anticipated declaration in the global namespace
3252 and additionally in the std namespace if appropriate.
3254 CLASS and CODE tell later passes how to compile calls to this function.
3255 See tree.h for possible values.
3257 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3258 the name to be called if we can't opencode the function.
3260 If ATTRS is nonzero, use that for the function's attribute
3264 builtin_function (const char* name,
3267 enum built_in_class cl,
3268 const char* libname,
3271 /* All builtins that don't begin with an '_' should additionally
3272 go in the 'std' namespace. */
3275 push_namespace (std_identifier);
3276 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3280 return builtin_function_1 (name, type, NULL_TREE, code,
3281 cl, libname, attrs);
3284 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3285 function. Not called directly. */
3288 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3290 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3291 DECL_EXTERNAL (fn) = 1;
3292 TREE_PUBLIC (fn) = 1;
3293 DECL_ARTIFICIAL (fn) = 1;
3294 TREE_NOTHROW (fn) = 1;
3295 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3296 SET_DECL_LANGUAGE (fn, lang_c);
3297 /* Runtime library routines are, by definition, available in an
3298 external shared object. */
3299 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3300 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3304 /* Returns the _DECL for a library function with C linkage.
3305 We assume that such functions never throw; if this is incorrect,
3306 callers should unset TREE_NOTHROW. */
3309 build_library_fn (tree name, tree type)
3311 return build_library_fn_1 (name, ERROR_MARK, type);
3314 /* Returns the _DECL for a library function with C++ linkage. */
3317 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3319 tree fn = build_library_fn_1 (name, operator_code, type);
3320 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3321 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3322 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3326 /* Like build_library_fn, but takes a C string instead of an
3330 build_library_fn_ptr (const char* name, tree type)
3332 return build_library_fn (get_identifier (name), type);
3335 /* Like build_cp_library_fn, but takes a C string instead of an
3339 build_cp_library_fn_ptr (const char* name, tree type)
3341 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3344 /* Like build_library_fn, but also pushes the function so that we will
3345 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3348 push_library_fn (tree name, tree type)
3350 tree fn = build_library_fn (name, type);
3351 pushdecl_top_level (fn);
3355 /* Like build_cp_library_fn, but also pushes the function so that it
3356 will be found by normal lookup. */
3359 push_cp_library_fn (enum tree_code operator_code, tree type)
3361 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3368 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3372 push_void_library_fn (tree name, tree parmtypes)
3374 tree type = build_function_type (void_type_node, parmtypes);
3375 return push_library_fn (name, type);
3378 /* Like push_library_fn, but also note that this function throws
3379 and does not return. Used for __throw_foo and the like. */
3382 push_throw_library_fn (tree name, tree type)
3384 tree fn = push_library_fn (name, type);
3385 TREE_THIS_VOLATILE (fn) = 1;
3386 TREE_NOTHROW (fn) = 0;
3390 /* When we call finish_struct for an anonymous union, we create
3391 default copy constructors and such. But, an anonymous union
3392 shouldn't have such things; this function undoes the damage to the
3393 anonymous union type T.
3395 (The reason that we create the synthesized methods is that we don't
3396 distinguish `union { int i; }' from `typedef union { int i; } U'.
3397 The first is an anonymous union; the second is just an ordinary
3401 fixup_anonymous_aggr (tree t)
3405 /* Wipe out memory of synthesized methods. */
3406 TYPE_HAS_CONSTRUCTOR (t) = 0;
3407 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3408 TYPE_HAS_INIT_REF (t) = 0;
3409 TYPE_HAS_CONST_INIT_REF (t) = 0;
3410 TYPE_HAS_ASSIGN_REF (t) = 0;
3411 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3413 /* Splice the implicitly generated functions out of the TYPE_METHODS
3415 q = &TYPE_METHODS (t);
3418 if (DECL_ARTIFICIAL (*q))
3419 *q = TREE_CHAIN (*q);
3421 q = &TREE_CHAIN (*q);
3424 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3425 if (TYPE_METHODS (t))
3426 error ("%Jan anonymous union cannot have function members",
3427 TYPE_MAIN_DECL (t));
3429 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3430 assignment operators (because they cannot have these methods themselves).
3431 For anonymous unions this is already checked because they are not allowed
3432 in any union, otherwise we have to check it. */
3433 if (TREE_CODE (t) != UNION_TYPE)
3437 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3438 if (TREE_CODE (field) == FIELD_DECL)
3440 type = TREE_TYPE (field);
3441 if (CLASS_TYPE_P (type))
3443 if (TYPE_NEEDS_CONSTRUCTING (type))
3444 cp_error_at ("member %#D' with constructor not allowed in anonymous aggregate",
3446 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3447 cp_error_at ("member %#D' with destructor not allowed in anonymous aggregate",
3449 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3450 cp_error_at ("member %#D' with copy assignment operator not allowed in anonymous aggregate",
3457 /* Make sure that a declaration with no declarator is well-formed, i.e.
3458 just declares a tagged type or anonymous union.
3460 Returns the type declared; or NULL_TREE if none. */
3463 check_tag_decl (cp_decl_specifier_seq *declspecs)
3465 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3466 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3467 /* If a class, struct, or enum type is declared by the DECLSPECS
3468 (i.e, if a class-specifier, enum-specifier, or non-typename
3469 elaborated-type-specifier appears in the DECLSPECS),
3470 DECLARED_TYPE is set to the corresponding type. */
3471 tree declared_type = NULL_TREE;
3472 bool error_p = false;
3474 if (declspecs->multiple_types_p)
3475 error ("multiple types in one declaration");
3476 else if (declspecs->redefined_builtin_type)
3478 if (!in_system_header)
3479 pedwarn ("redeclaration of C++ built-in type %qT",
3480 declspecs->redefined_builtin_type);
3484 if (TYPE_P (declspecs->type)
3485 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3486 && IS_AGGR_TYPE (declspecs->type))
3487 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3488 declared_type = declspecs->type;
3489 else if (declspecs->type == error_mark_node)
3491 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3492 pedwarn ("declaration does not declare anything");
3493 /* Check for an anonymous union. */
3494 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3495 && TYPE_ANONYMOUS_P (declared_type))
3497 /* 7/3 In a simple-declaration, the optional init-declarator-list
3498 can be omitted only when declaring a class (clause 9) or
3499 enumeration (7.2), that is, when the decl-specifier-seq contains
3500 either a class-specifier, an elaborated-type-specifier with
3501 a class-key (9.1), or an enum-specifier. In these cases and
3502 whenever a class-specifier or enum-specifier is present in the
3503 decl-specifier-seq, the identifiers in these specifiers are among
3504 the names being declared by the declaration (as class-name,
3505 enum-names, or enumerators, depending on the syntax). In such
3506 cases, and except for the declaration of an unnamed bit-field (9.6),
3507 the decl-specifier-seq shall introduce one or more names into the
3508 program, or shall redeclare a name introduced by a previous
3509 declaration. [Example:
3510 enum { }; // ill-formed
3511 typedef class { }; // ill-formed
3515 error ("missing type-name in typedef-declaration");
3518 /* Anonymous unions are objects, so they can have specifiers. */;
3519 SET_ANON_AGGR_TYPE_P (declared_type);
3521 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3522 && !in_system_header)
3523 pedwarn ("ISO C++ prohibits anonymous structs");
3528 if (declspecs->specs[(int)ds_inline]
3529 || declspecs->specs[(int)ds_virtual])
3530 error ("`%s' can only be specified for functions",
3531 declspecs->specs[(int)ds_inline]
3532 ? "inline" : "virtual");
3534 && (!current_class_type
3535 || current_scope () != current_class_type))
3536 error ("`friend' can only be specified inside a class");
3537 else if (declspecs->specs[(int)ds_explicit])
3538 error ("`explicit' can only be specified for constructors");
3539 else if (declspecs->storage_class)
3540 error ("a storage class can only be specified for objects "
3542 else if (declspecs->specs[(int)ds_const]
3543 || declspecs->specs[(int)ds_volatile]
3544 || declspecs->specs[(int)ds_restrict]
3545 || declspecs->specs[(int)ds_thread])
3546 error ("qualifiers can only be specified for objects "
3550 return declared_type;
3553 /* Called when a declaration is seen that contains no names to declare.
3554 If its type is a reference to a structure, union or enum inherited
3555 from a containing scope, shadow that tag name for the current scope
3556 with a forward reference.
3557 If its type defines a new named structure or union
3558 or defines an enum, it is valid but we need not do anything here.
3559 Otherwise, it is an error.
3561 C++: may have to grok the declspecs to learn about static,
3562 complain for anonymous unions.
3564 Returns the TYPE declared -- or NULL_TREE if none. */
3567 shadow_tag (cp_decl_specifier_seq *declspecs)
3569 tree t = check_tag_decl (declspecs);
3574 maybe_process_partial_specialization (t);
3576 /* This is where the variables in an anonymous union are
3577 declared. An anonymous union declaration looks like:
3579 because there is no declarator after the union, the parser
3580 sends that declaration here. */
3581 if (ANON_AGGR_TYPE_P (t))
3583 fixup_anonymous_aggr (t);
3585 if (TYPE_FIELDS (t))
3587 tree decl = grokdeclarator (/*declarator=*/NULL,
3588 declspecs, NORMAL, 0, NULL);
3589 finish_anon_union (decl);
3596 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3599 groktypename (cp_decl_specifier_seq *type_specifiers,
3600 const cp_declarator *declarator)
3604 attrs = type_specifiers->attributes;
3605 type_specifiers->attributes = NULL_TREE;
3606 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3608 cplus_decl_attributes (&type, attrs, 0);
3612 /* Decode a declarator in an ordinary declaration or data definition.
3613 This is called as soon as the type information and variable name
3614 have been parsed, before parsing the initializer if any.
3615 Here we create the ..._DECL node, fill in its type,
3616 and put it on the list of decls for the current context.
3617 The ..._DECL node is returned as the value.
3619 Exception: for arrays where the length is not specified,
3620 the type is left null, to be filled in by `cp_finish_decl'.
3622 Function definitions do not come here; they go to start_function
3623 instead. However, external and forward declarations of functions
3624 do go through here. Structure field declarations are done by
3625 grokfield and not through here. */
3628 start_decl (const cp_declarator *declarator,
3629 cp_decl_specifier_seq *declspecs,
3632 tree prefix_attributes,
3639 /* This should only be done once on the top most decl. */
3640 if (have_extern_spec)
3642 declspecs->storage_class = sc_extern;
3643 have_extern_spec = false;
3646 /* An object declared as __attribute__((deprecated)) suppresses
3647 warnings of uses of other deprecated items. */
3648 if (lookup_attribute ("deprecated", attributes))
3649 deprecated_state = DEPRECATED_SUPPRESS;
3651 attributes = chainon (attributes, prefix_attributes);
3653 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3656 deprecated_state = DEPRECATED_NORMAL;
3658 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
3661 type = TREE_TYPE (decl);
3663 if (type == error_mark_node)
3666 context = DECL_CONTEXT (decl);
3669 *pop_scope_p = push_scope (context);
3671 *pop_scope_p = false;
3673 /* We are only interested in class contexts, later. */
3674 if (context && TREE_CODE (context) == NAMESPACE_DECL)
3675 context = NULL_TREE;
3678 /* Is it valid for this decl to have an initializer at all?
3679 If not, set INITIALIZED to zero, which will indirectly
3680 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3681 switch (TREE_CODE (decl))
3684 error ("typedef `%D' is initialized (use __typeof__ instead)", decl);
3689 error ("function `%#D' is initialized like a variable", decl);
3699 if (! toplevel_bindings_p ()
3700 && DECL_EXTERNAL (decl))
3701 warning ("declaration of `%#D' has `extern' and is initialized",
3703 DECL_EXTERNAL (decl) = 0;
3704 if (toplevel_bindings_p ())
3705 TREE_STATIC (decl) = 1;
3707 /* Tell `pushdecl' this is an initialized decl
3708 even though we don't yet have the initializer expression.
3709 Also tell `cp_finish_decl' it may store the real initializer. */
3710 DECL_INITIAL (decl) = error_mark_node;
3713 /* Set attributes here so if duplicate decl, will have proper attributes. */
3714 cplus_decl_attributes (&decl, attributes, 0);
3716 /* If #pragma weak was used, mark the decl weak now. */
3717 if (global_scope_p (current_binding_level))
3718 maybe_apply_pragma_weak (decl);
3720 if (TREE_CODE (decl) == FUNCTION_DECL
3721 && DECL_DECLARED_INLINE_P (decl)
3722 && DECL_UNINLINABLE (decl)
3723 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3724 warning ("%Jinline function '%D' given attribute noinline", decl, decl);
3726 if (context && COMPLETE_TYPE_P (complete_type (context)))
3728 if (TREE_CODE (decl) == VAR_DECL)
3730 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3731 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3732 error ("`%#D' is not a static member of `%#T'", decl, context);
3735 if (DECL_CONTEXT (field) != context)
3737 if (!same_type_p (DECL_CONTEXT (field), context))
3738 pedwarn ("ISO C++ does not permit `%T::%D' to be defined as `%T::%D'",
3739 DECL_CONTEXT (field), DECL_NAME (decl),
3740 context, DECL_NAME (decl));
3741 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3743 /* Static data member are tricky; an in-class initialization
3744 still doesn't provide a definition, so the in-class
3745 declaration will have DECL_EXTERNAL set, but will have an
3746 initialization. Thus, duplicate_decls won't warn
3747 about this situation, and so we check here. */
3748 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
3749 error ("duplicate initialization of %D", decl);
3750 if (duplicate_decls (decl, field))
3756 tree field = check_classfn (context, decl,
3757 (processing_template_decl
3758 > template_class_depth (context))
3759 ? current_template_parms
3761 if (field && duplicate_decls (decl, field))
3765 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3766 DECL_IN_AGGR_P (decl) = 0;
3767 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3768 || CLASSTYPE_TEMPLATE_INSTANTIATION (context))
3770 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3771 /* [temp.expl.spec] An explicit specialization of a static data
3772 member of a template is a definition if the declaration
3773 includes an initializer; otherwise, it is a declaration.
3775 We check for processing_specialization so this only applies
3776 to the new specialization syntax. */
3777 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
3778 DECL_EXTERNAL (decl) = 1;
3781 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3782 pedwarn ("declaration of `%#D' outside of class is not definition",
3786 /* Enter this declaration into the symbol table. */
3787 tem = maybe_push_decl (decl);
3789 if (processing_template_decl)
3790 tem = push_template_decl (tem);
3791 if (tem == error_mark_node)
3792 return error_mark_node;
3794 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3795 /* Tell the back-end to use or not use .common as appropriate. If we say
3796 -fconserve-space, we want this to save .data space, at the expense of
3797 wrong semantics. If we say -fno-conserve-space, we want this to
3798 produce errors about redefs; to do this we force variables into the
3800 DECL_COMMON (tem) = ((TREE_CODE (tem) != VAR_DECL
3801 || !DECL_THREAD_LOCAL (tem))
3802 && (flag_conserve_space || ! TREE_PUBLIC (tem)));
3805 if (! processing_template_decl)
3812 start_decl_1 (tree decl)
3814 tree type = TREE_TYPE (decl);
3815 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
3817 if (type == error_mark_node)
3821 /* Is it valid for this decl to have an initializer at all?
3822 If not, set INITIALIZED to zero, which will indirectly
3823 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3825 /* Don't allow initializations for incomplete types except for
3826 arrays which might be completed by the initialization. */
3827 if (COMPLETE_TYPE_P (complete_type (type)))
3828 ; /* A complete type is ok. */
3829 else if (TREE_CODE (type) != ARRAY_TYPE)
3831 error ("variable `%#D' has initializer but incomplete type",
3834 type = TREE_TYPE (decl) = error_mark_node;
3836 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3838 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3839 error ("elements of array `%#D' have incomplete type", decl);
3840 /* else we already gave an error in start_decl. */
3846 && TREE_CODE (decl) != TYPE_DECL
3847 && TREE_CODE (decl) != TEMPLATE_DECL
3848 && type != error_mark_node
3849 && IS_AGGR_TYPE (type)
3850 && ! DECL_EXTERNAL (decl))
3852 if ((! processing_template_decl || ! uses_template_parms (type))
3853 && !COMPLETE_TYPE_P (complete_type (type)))
3855 error ("aggregate `%#D' has incomplete type and cannot be defined",
3857 /* Change the type so that assemble_variable will give
3858 DECL an rtl we can live with: (mem (const_int 0)). */
3859 type = TREE_TYPE (decl) = error_mark_node;
3863 /* If any base type in the hierarchy of TYPE needs a constructor,
3864 then we set initialized to 1. This way any nodes which are
3865 created for the purposes of initializing this aggregate
3866 will live as long as it does. This is necessary for global
3867 aggregates which do not have their initializers processed until
3868 the end of the file. */
3869 initialized = TYPE_NEEDS_CONSTRUCTING (type);
3874 DECL_INITIAL (decl) = NULL_TREE;
3876 /* Create a new scope to hold this declaration if necessary.
3877 Whether or not a new scope is necessary cannot be determined
3878 until after the type has been completed; if the type is a
3879 specialization of a class template it is not until after
3880 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3881 will be set correctly. */
3882 maybe_push_cleanup_level (type);
3885 /* Handle initialization of references. DECL, TYPE, and INIT have the
3886 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3887 but will be set to a new CLEANUP_STMT if a temporary is created
3888 that must be destroyed subsequently.
3890 Returns an initializer expression to use to initialize DECL, or
3891 NULL if the initialization can be performed statically.
3893 Quotes on semantics can be found in ARM 8.4.3. */
3896 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
3900 if (init == NULL_TREE)
3902 if ((DECL_LANG_SPECIFIC (decl) == 0
3903 || DECL_IN_AGGR_P (decl) == 0)
3904 && ! DECL_THIS_EXTERN (decl))
3905 error ("`%D' declared as reference but not initialized", decl);
3909 if (TREE_CODE (init) == CONSTRUCTOR)
3911 error ("ISO C++ forbids use of initializer list to initialize reference `%D'", decl);
3915 if (TREE_CODE (init) == TREE_LIST)
3916 init = build_x_compound_expr_from_list (init, "initializer");
3918 if (TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE)
3919 init = convert_from_reference (init);
3921 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
3922 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
3923 /* Note: default conversion is only called in very special cases. */
3924 init = decay_conversion (init);
3926 /* Convert INIT to the reference type TYPE. This may involve the
3927 creation of a temporary, whose lifetime must be the same as that
3928 of the reference. If so, a DECL_EXPR for the temporary will be
3929 added just after the DECL_EXPR for DECL. That's why we don't set
3930 DECL_INITIAL for local references (instead assigning to them
3931 explicitly); we need to allow the temporary to be initialized
3933 tmp = initialize_reference (type, init, decl, cleanup);
3935 if (tmp == error_mark_node)
3937 else if (tmp == NULL_TREE)
3939 error ("cannot initialize `%T' from `%T'", type, TREE_TYPE (init));
3943 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
3946 DECL_INITIAL (decl) = tmp;
3951 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3952 array until we finish parsing the initializer. If that's the
3953 situation we're in, update DECL accordingly. */
3956 maybe_deduce_size_from_array_init (tree decl, tree init)
3958 tree type = TREE_TYPE (decl);
3960 if (TREE_CODE (type) == ARRAY_TYPE
3961 && TYPE_DOMAIN (type) == NULL_TREE
3962 && TREE_CODE (decl) != TYPE_DECL)
3964 /* do_default is really a C-ism to deal with tentative definitions.
3965 But let's leave it here to ease the eventual merge. */
3966 int do_default = !DECL_EXTERNAL (decl);
3967 tree initializer = init ? init : DECL_INITIAL (decl);
3968 int failure = complete_array_type (type, initializer, do_default);
3971 error ("initializer fails to determine size of `%D'", decl);
3976 error ("array size missing in `%D'", decl);
3977 /* If a `static' var's size isn't known, make it extern as
3978 well as static, so it does not get allocated. If it's not
3979 `static', then don't mark it extern; finish_incomplete_decl
3980 will give it a default size and it will get allocated. */
3981 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
3982 DECL_EXTERNAL (decl) = 1;
3985 if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
3986 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
3988 error ("zero-size array `%D'", decl);
3990 layout_decl (decl, 0);
3994 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
3995 any appropriate error messages regarding the layout. */
3998 layout_var_decl (tree decl)
4000 tree type = TREE_TYPE (decl);
4002 tree ttype = target_type (type);
4005 /* If we haven't already layed out this declaration, do so now.
4006 Note that we must not call complete type for an external object
4007 because it's type might involve templates that we are not
4008 supposed to instantiate yet. (And it's perfectly valid to say
4009 `extern X x' for some incomplete type `X'.) */
4010 if (!DECL_EXTERNAL (decl))
4011 complete_type (type);
4012 if (!DECL_SIZE (decl)
4013 && TREE_TYPE (decl) != error_mark_node
4014 && (COMPLETE_TYPE_P (type)
4015 || (TREE_CODE (type) == ARRAY_TYPE
4016 && !TYPE_DOMAIN (type)
4017 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4018 layout_decl (decl, 0);
4020 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4022 /* An automatic variable with an incomplete type: that is an error.
4023 Don't talk about array types here, since we took care of that
4024 message in grokdeclarator. */
4025 error ("storage size of `%D' isn't known", decl);
4026 TREE_TYPE (decl) = error_mark_node;
4029 /* Keep this code around in case we later want to control debug info
4030 based on whether a type is "used". (jason 1999-11-11) */
4032 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4033 /* Let debugger know it should output info for this type. */
4034 note_debug_info_needed (ttype);
4036 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4037 note_debug_info_needed (DECL_CONTEXT (decl));
4040 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4041 && DECL_SIZE (decl) != NULL_TREE
4042 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4044 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4045 constant_expression_warning (DECL_SIZE (decl));
4047 error ("storage size of `%D' isn't constant", decl);
4050 if (TREE_STATIC (decl)
4051 && !DECL_ARTIFICIAL (decl)
4052 && current_function_decl
4053 && DECL_CONTEXT (decl) == current_function_decl)
4054 push_local_name (decl);
4057 /* If a local static variable is declared in an inline function, or if
4058 we have a weak definition, we must endeavor to create only one
4059 instance of the variable at link-time. */
4062 maybe_commonize_var (tree decl)
4064 /* Static data in a function with comdat linkage also has comdat
4066 if (TREE_STATIC (decl)
4067 /* Don't mess with __FUNCTION__. */
4068 && ! DECL_ARTIFICIAL (decl)
4069 && DECL_FUNCTION_SCOPE_P (decl)
4070 /* Unfortunately, import_export_decl has not always been called
4071 before the function is processed, so we cannot simply check
4073 && (DECL_COMDAT (DECL_CONTEXT (decl))
4074 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4075 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4076 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4080 /* With weak symbols, we simply make the variable COMDAT;
4081 that will cause copies in multiple translations units to
4083 comdat_linkage (decl);
4087 if (DECL_INITIAL (decl) == NULL_TREE
4088 || DECL_INITIAL (decl) == error_mark_node)
4090 /* Without weak symbols, we can use COMMON to merge
4091 uninitialized variables. */
4092 TREE_PUBLIC (decl) = 1;
4093 DECL_COMMON (decl) = 1;
4097 /* While for initialized variables, we must use internal
4098 linkage -- which means that multiple copies will not
4100 TREE_PUBLIC (decl) = 0;
4101 DECL_COMMON (decl) = 0;
4102 cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl);
4103 warning ("%J you can work around this by removing the initializer",
4108 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4109 /* Set it up again; we might have set DECL_INITIAL since the last
4111 comdat_linkage (decl);
4114 /* Issue an error message if DECL is an uninitialized const variable. */
4117 check_for_uninitialized_const_var (tree decl)
4119 tree type = TREE_TYPE (decl);
4121 /* ``Unless explicitly declared extern, a const object does not have
4122 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4124 if (TREE_CODE (decl) == VAR_DECL
4125 && TREE_CODE (type) != REFERENCE_TYPE
4126 && CP_TYPE_CONST_P (type)
4127 && !TYPE_NEEDS_CONSTRUCTING (type)
4128 && !DECL_INITIAL (decl))
4129 error ("uninitialized const `%D'", decl);
4132 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4133 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4134 initialized. If there are no more such fields, the return value
4138 next_initializable_field (tree field)
4141 && (TREE_CODE (field) != FIELD_DECL
4142 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4143 || DECL_ARTIFICIAL (field)))
4144 field = TREE_CHAIN (field);
4149 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4150 brace-enclosed aggregate initializer.
4152 *INITP is one of a list of initializers describing a brace-enclosed
4153 initializer for an entity of the indicated aggregate TYPE. It may
4154 not presently match the shape of the TYPE; for example:
4156 struct S { int a; int b; };
4157 struct S a[] = { 1, 2, 3, 4 };
4159 Here *INITP will point to TREE_LIST of four elements, rather than a
4160 list of two elements, each itself a list of two elements. This
4161 routine transforms INIT from the former form into the latter. The
4162 revised initializer is returned. */
4165 reshape_init (tree type, tree *initp)
4169 tree old_init_value;
4171 bool brace_enclosed_p;
4174 old_init_value = (TREE_CODE (*initp) == TREE_LIST
4175 ? TREE_VALUE (*initp) : old_init);
4177 gcc_assert (old_init_value);
4179 /* If the initializer is brace-enclosed, pull initializers from the
4180 enclosed elements. Advance past the brace-enclosed initializer
4182 if (TREE_CODE (old_init_value) == CONSTRUCTOR
4183 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value))
4185 *initp = TREE_CHAIN (old_init);
4186 TREE_CHAIN (old_init) = NULL_TREE;
4187 inits = CONSTRUCTOR_ELTS (old_init_value);
4189 brace_enclosed_p = true;
4194 brace_enclosed_p = false;
4197 /* A non-aggregate type is always initialized with a single
4199 if (!CP_AGGREGATE_TYPE_P (type))
4201 *initp = TREE_CHAIN (old_init);
4202 TREE_CHAIN (old_init) = NULL_TREE;
4203 /* It is invalid to initialize a non-aggregate type with a
4204 brace-enclosed initializer. */
4205 if (brace_enclosed_p)
4207 error ("brace-enclosed initializer used to initialize `%T'",
4209 if (TREE_CODE (old_init) == TREE_LIST)
4210 TREE_VALUE (old_init) = error_mark_node;
4212 old_init = error_mark_node;
4220 All implicit type conversions (clause _conv_) are considered when
4221 initializing the aggregate member with an initializer from an
4222 initializer-list. If the initializer can initialize a member,
4223 the member is initialized. Otherwise, if the member is itself a
4224 non-empty subaggregate, brace elision is assumed and the
4225 initializer is considered for the initialization of the first
4226 member of the subaggregate. */
4227 if (!brace_enclosed_p
4228 && can_convert_arg (type, TREE_TYPE (old_init_value), old_init_value))
4230 *initp = TREE_CHAIN (old_init);
4231 TREE_CHAIN (old_init) = NULL_TREE;
4235 if (TREE_CODE (old_init_value) == STRING_CST
4236 && TREE_CODE (type) == ARRAY_TYPE
4237 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4239 /* [dcl.init.string]
4241 A char array (whether plain char, signed char, or unsigned char)
4242 can be initialized by a string-literal (optionally enclosed in
4243 braces); a wchar_t array can be initialized by a wide
4244 string-literal (optionally enclosed in braces). */
4245 new_init = old_init;
4246 /* Move past the initializer. */
4247 *initp = TREE_CHAIN (old_init);
4248 TREE_CHAIN (old_init) = NULL_TREE;
4252 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4253 new_init = build_constructor (NULL_TREE, NULL_TREE);
4255 if (CLASS_TYPE_P (type))
4259 field = next_initializable_field (TYPE_FIELDS (type));
4265 An initializer for an aggregate member that is an
4266 empty class shall have the form of an empty
4267 initializer-list {}. */
4268 if (!brace_enclosed_p)
4270 error ("initializer for `%T' must be brace-enclosed",
4272 return error_mark_node;
4277 /* Loop through the initializable fields, gathering
4283 /* Handle designated initializers, as an extension. */
4284 if (TREE_PURPOSE (*initp))
4287 pedwarn ("ISO C++ does not allow designated initializers");
4288 field = lookup_field_1 (type, TREE_PURPOSE (*initp),
4289 /*want_type=*/false);
4290 if (!field || TREE_CODE (field) != FIELD_DECL)
4291 error ("`%T' has no non-static data member named `%D'",
4292 type, TREE_PURPOSE (*initp));
4297 field_init = reshape_init (TREE_TYPE (field), initp);
4298 if (field_init == error_mark_node)
4299 return error_mark_node;
4300 TREE_CHAIN (field_init) = CONSTRUCTOR_ELTS (new_init);
4301 CONSTRUCTOR_ELTS (new_init) = field_init;
4304 When a union is initialized with a brace-enclosed
4305 initializer, the braces shall only contain an
4306 initializer for the first member of the union. */
4307 if (TREE_CODE (type) == UNION_TYPE)
4309 field = next_initializable_field (TREE_CHAIN (field));
4313 else if (TREE_CODE (type) == ARRAY_TYPE
4314 || TREE_CODE (type) == VECTOR_TYPE)
4319 /* If the bound of the array is known, take no more initializers
4320 than are allowed. */
4321 max_index = NULL_TREE;
4322 if (TREE_CODE (type) == ARRAY_TYPE)
4324 if (TYPE_DOMAIN (type))
4325 max_index = array_type_nelts (type);
4329 /* For a vector, the representation type is a struct
4330 containing a single member which is an array of the
4331 appropriate size. */
4332 tree rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4333 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4334 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4337 /* Loop through the array elements, gathering initializers. */
4338 for (index = size_zero_node;
4339 *initp && (!max_index || !tree_int_cst_lt (max_index, index));
4340 index = size_binop (PLUS_EXPR, index, size_one_node))
4344 element_init = reshape_init (TREE_TYPE (type), initp);
4345 if (element_init == error_mark_node)
4346 return error_mark_node;
4347 TREE_CHAIN (element_init) = CONSTRUCTOR_ELTS (new_init);
4348 CONSTRUCTOR_ELTS (new_init) = element_init;
4349 if (TREE_PURPOSE (element_init))
4351 tree next_index = TREE_PURPOSE (element_init);
4352 if (TREE_CODE (next_index) == IDENTIFIER_NODE)
4354 error ("name `%D' used in a GNU-style designated "
4355 "initializer for an array", next_index);
4356 TREE_PURPOSE (element_init) = NULL_TREE;
4366 /* The initializers were placed in reverse order in the
4368 CONSTRUCTOR_ELTS (new_init) = nreverse (CONSTRUCTOR_ELTS (new_init));
4370 if (TREE_CODE (old_init) == TREE_LIST)
4371 new_init = build_tree_list (TREE_PURPOSE (old_init), new_init);
4374 /* If this was a brace-enclosed initializer and all of the
4375 initializers were not used up, there is a problem. */
4376 if (brace_enclosed_p && *initp)
4377 error ("too many initializers for `%T'", type);
4382 /* Verify INIT (the initializer for DECL), and record the
4383 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4384 grok_reference_init.
4386 If the return value is non-NULL, it is an expression that must be
4387 evaluated dynamically to initialize DECL. */
4390 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4392 tree type = TREE_TYPE (decl);
4393 tree init_code = NULL;
4395 /* If `start_decl' didn't like having an initialization, ignore it now. */
4396 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
4399 /* If an initializer is present, DECL_INITIAL has been
4400 error_mark_node, to indicate that an as-of-yet unevaluated
4401 initialization will occur. From now on, DECL_INITIAL reflects
4402 the static initialization -- if any -- of DECL. */
4403 DECL_INITIAL (decl) = NULL_TREE;
4405 /* Things that are going to be initialized need to have complete
4407 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4409 if (type == error_mark_node)
4410 /* We will have already complained. */
4412 else if (init && COMPLETE_TYPE_P (type)
4413 && !TREE_CONSTANT (TYPE_SIZE (type)))
4415 error ("variable-sized object `%D' may not be initialized", decl);
4418 else if (TREE_CODE (type) == ARRAY_TYPE
4419 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4421 error ("elements of array `%#D' have incomplete type", decl);
4424 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4426 error ("`%D' has incomplete type", decl);
4427 TREE_TYPE (decl) = error_mark_node;
4431 if (TREE_CODE (decl) == CONST_DECL)
4433 gcc_assert (TREE_CODE (decl) != REFERENCE_TYPE);
4435 DECL_INITIAL (decl) = init;
4437 gcc_assert (init != NULL_TREE);
4440 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4441 init = grok_reference_init (decl, type, init, cleanup);
4444 if (TREE_CODE (init) == CONSTRUCTOR
4445 && BRACE_ENCLOSED_INITIALIZER_P (init))
4447 /* [dcl.init] paragraph 13,
4448 If T is a scalar type, then a declaration of the form
4453 reshape_init will complain about the extra braces,
4454 and doesn't do anything useful in the case where TYPE is
4455 scalar, so just don't call it. */
4456 if (CP_AGGREGATE_TYPE_P (type))
4457 init = reshape_init (type, &init);
4459 if ((*targetm.vector_opaque_p) (type))
4461 error ("opaque vector types cannot be initialized");
4462 init = error_mark_node;
4466 /* If DECL has an array type without a specific bound, deduce the
4467 array size from the initializer. */
4468 maybe_deduce_size_from_array_init (decl, init);
4469 type = TREE_TYPE (decl);
4471 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4473 if (TREE_CODE (type) == ARRAY_TYPE)
4474 goto initialize_aggr;
4475 else if (TREE_CODE (init) == CONSTRUCTOR
4476 && BRACE_ENCLOSED_INITIALIZER_P (init))
4478 if (TYPE_NON_AGGREGATE_CLASS (type))
4480 error ("`%D' must be initialized by constructor, not by `{...}'",
4482 init = error_mark_node;
4485 goto dont_use_constructor;
4489 int saved_stmts_are_full_exprs_p;
4492 saved_stmts_are_full_exprs_p = 0;
4493 if (building_stmt_tree ())
4495 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4496 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4498 init = build_aggr_init (decl, init, flags);
4499 if (building_stmt_tree ())
4500 current_stmt_tree ()->stmts_are_full_exprs_p =
4501 saved_stmts_are_full_exprs_p;
4507 dont_use_constructor:
4508 if (TREE_CODE (init) != TREE_VEC)
4510 init_code = store_init_value (decl, init);
4515 else if (DECL_EXTERNAL (decl))
4517 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4518 goto initialize_aggr;
4519 else if (IS_AGGR_TYPE (type))
4521 tree core_type = strip_array_types (type);
4523 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4524 error ("structure `%D' with uninitialized const members", decl);
4525 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4526 error ("structure `%D' with uninitialized reference members",
4529 check_for_uninitialized_const_var (decl);
4532 check_for_uninitialized_const_var (decl);
4534 if (init && init != error_mark_node)
4535 init_code = build2 (INIT_EXPR, type, decl, init);
4540 /* If DECL is not a local variable, give it RTL. */
4543 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4545 int toplev = toplevel_bindings_p ();
4548 /* Set the DECL_ASSEMBLER_NAME for the object. */
4551 /* The `register' keyword, when used together with an
4552 asm-specification, indicates that the variable should be
4553 placed in a particular register. */
4554 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4556 change_decl_assembler_name (decl, get_identifier (asmspec));
4557 DECL_HARD_REGISTER (decl) = 1;
4560 set_user_assembler_name (decl, asmspec);
4563 /* Handle non-variables up front. */
4564 if (TREE_CODE (decl) != VAR_DECL)
4566 rest_of_decl_compilation (decl, toplev, at_eof);
4570 /* If we see a class member here, it should be a static data
4572 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4574 gcc_assert (TREE_STATIC (decl));
4575 /* An in-class declaration of a static data member should be
4576 external; it is only a declaration, and not a definition. */
4577 if (init == NULL_TREE)
4578 gcc_assert (DECL_EXTERNAL (decl));
4581 /* We don't create any RTL for local variables. */
4582 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4585 /* We defer emission of local statics until the corresponding
4586 DECL_EXPR is expanded. */
4587 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4589 /* We try to defer namespace-scope static constants so that they are
4590 not emitted into the object file unnecessarily. */
4591 if (!DECL_VIRTUAL_P (decl)
4592 && TREE_READONLY (decl)
4593 && DECL_INITIAL (decl) != NULL_TREE
4594 && DECL_INITIAL (decl) != error_mark_node
4595 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4597 && !TREE_PUBLIC (decl))
4599 /* Fool with the linkage of static consts according to #pragma
4601 struct c_fileinfo *finfo = get_fileinfo (input_filename);
4602 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4604 TREE_PUBLIC (decl) = 1;
4605 DECL_EXTERNAL (decl) = finfo->interface_only;
4610 /* Likewise for template instantiations. */
4611 else if (DECL_LANG_SPECIFIC (decl)
4612 && DECL_IMPLICIT_INSTANTIATION (decl))
4615 /* If we're not deferring, go ahead and assemble the variable. */
4617 rest_of_decl_compilation (decl, toplev, at_eof);
4620 /* Generate code to initialize DECL (a local variable). */
4623 initialize_local_var (tree decl, tree init)
4625 tree type = TREE_TYPE (decl);
4628 gcc_assert (TREE_CODE (decl) == VAR_DECL
4629 || TREE_CODE (decl) == RESULT_DECL);
4630 gcc_assert (!TREE_STATIC (decl));
4632 if (DECL_SIZE (decl) == NULL_TREE)
4634 /* If we used it already as memory, it must stay in memory. */
4635 DECL_INITIAL (decl) = NULL_TREE;
4636 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4639 if (DECL_SIZE (decl) && type != error_mark_node)
4643 /* Compute and store the initial value. */
4644 already_used = TREE_USED (decl) || TREE_USED (type);
4646 /* Perform the initialization. */
4649 int saved_stmts_are_full_exprs_p;
4651 gcc_assert (building_stmt_tree ());
4652 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4653 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4654 finish_expr_stmt (init);
4655 current_stmt_tree ()->stmts_are_full_exprs_p =
4656 saved_stmts_are_full_exprs_p;
4659 /* Set this to 0 so we can tell whether an aggregate which was
4660 initialized was ever used. Don't do this if it has a
4661 destructor, so we don't complain about the 'resource
4662 allocation is initialization' idiom. Now set
4663 attribute((unused)) on types so decls of that type will be
4664 marked used. (see TREE_USED, above.) */
4665 if (TYPE_NEEDS_CONSTRUCTING (type)
4667 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4668 && DECL_NAME (decl))
4669 TREE_USED (decl) = 0;
4670 else if (already_used)
4671 TREE_USED (decl) = 1;
4674 /* Generate a cleanup, if necessary. */
4675 cleanup = cxx_maybe_build_cleanup (decl);
4676 if (DECL_SIZE (decl) && cleanup)
4677 finish_decl_cleanup (decl, cleanup);
4680 /* DECL is a VAR_DECL for a compiler-generated variable with static
4681 storage duration (like a virtual table) whose initializer is a
4682 compile-time constant. Initialize the variable and provide it to
4686 initialize_artificial_var (tree decl, tree init)
4688 DECL_INITIAL (decl) = build_constructor (NULL_TREE, init);
4689 DECL_INITIALIZED_P (decl) = 1;
4690 determine_visibility (decl);
4691 layout_var_decl (decl);
4692 maybe_commonize_var (decl);
4693 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
4696 /* Finish processing of a declaration;
4697 install its line number and initial value.
4698 If the length of an array type is not known before,
4699 it must be determined now, from the initial value, or it is an error.
4701 INIT holds the value of an initializer that should be allowed to escape
4704 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4705 if the (init) syntax was used. */
4708 cp_finish_decl (tree decl, tree init, tree asmspec_tree, int flags)
4711 tree ttype = NULL_TREE;
4713 const char *asmspec = NULL;
4714 int was_readonly = 0;
4716 if (decl == error_mark_node)
4721 error ("assignment (not initialization) in declaration");
4725 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
4727 /* Assume no cleanup is required. */
4728 cleanup = NULL_TREE;
4730 /* If a name was specified, get the string. */
4731 if (global_scope_p (current_binding_level))
4732 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
4734 asmspec = TREE_STRING_POINTER (asmspec_tree);
4736 if (init && TREE_CODE (init) == NAMESPACE_DECL)
4738 error ("cannot initialize `%D' to namespace `%D'",
4743 if (current_class_type
4744 && CP_DECL_CONTEXT (decl) == current_class_type
4745 && TYPE_BEING_DEFINED (current_class_type)
4746 && (DECL_INITIAL (decl) || init))
4747 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
4749 type = TREE_TYPE (decl);
4751 if (type == error_mark_node)
4754 if (TYPE_HAS_MUTABLE_P (type))
4755 TREE_READONLY (decl) = 0;
4757 if (processing_template_decl)
4759 /* Add this declaration to the statement-tree. */
4760 if (at_function_scope_p ())
4761 add_decl_expr (decl);
4763 if (init && DECL_INITIAL (decl))
4764 DECL_INITIAL (decl) = init;
4765 if (TREE_CODE (decl) == VAR_DECL
4766 && !DECL_PRETTY_FUNCTION_P (decl)
4767 && !dependent_type_p (TREE_TYPE (decl)))
4768 maybe_deduce_size_from_array_init (decl, init);
4772 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4773 gcc_assert (TREE_CODE (decl) != PARM_DECL);
4775 /* Take care of TYPE_DECLs up front. */
4776 if (TREE_CODE (decl) == TYPE_DECL)
4778 if (type != error_mark_node
4779 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
4781 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
4782 warning ("shadowing previous type declaration of `%#D'", decl);
4783 set_identifier_type_value (DECL_NAME (decl), decl);
4786 /* If we have installed this as the canonical typedef for this
4787 type, and that type has not been defined yet, delay emitting
4788 the debug information for it, as we will emit it later. */
4789 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
4790 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
4791 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
4793 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
4798 if (TREE_CODE (decl) != FUNCTION_DECL)
4799 ttype = target_type (type);
4802 /* Currently, GNU C++ puts constants in text space, making them
4803 impossible to initialize. In the future, one would hope for
4804 an operating system which understood the difference between
4805 initialization and the running of a program. */
4806 if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl))
4809 if (TYPE_NEEDS_CONSTRUCTING (type)
4810 || TREE_CODE (type) == REFERENCE_TYPE)
4811 TREE_READONLY (decl) = 0;
4814 if (TREE_CODE (decl) == VAR_DECL)
4816 /* Only PODs can have thread-local storage. Other types may require
4817 various kinds of non-trivial initialization. */
4818 if (DECL_THREAD_LOCAL (decl) && !pod_type_p (TREE_TYPE (decl)))
4819 error ("`%D' cannot be thread-local because it has non-POD type `%T'",
4820 decl, TREE_TYPE (decl));
4821 /* Convert the initializer to the type of DECL, if we have not
4822 already initialized DECL. */
4823 if (!DECL_INITIALIZED_P (decl)
4824 /* If !DECL_EXTERNAL then DECL is being defined. In the
4825 case of a static data member initialized inside the
4826 class-specifier, there can be an initializer even if DECL
4827 is *not* defined. */
4828 && (!DECL_EXTERNAL (decl) || init))
4830 init = check_initializer (decl, init, flags, &cleanup);
4831 /* Thread-local storage cannot be dynamically initialized. */
4832 if (DECL_THREAD_LOCAL (decl) && init)
4834 error ("`%D' is thread-local and so cannot be dynamically "
4835 "initialized", decl);
4842 The memory occupied by any object of static storage
4843 duration is zero-initialized at program startup before
4844 any other initialization takes place.
4846 We cannot create an appropriate initializer until after
4847 the type of DECL is finalized. If DECL_INITIAL is set,
4848 then the DECL is statically initialized, and any
4849 necessary zero-initialization has already been performed. */
4850 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
4851 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
4852 /*nelts=*/NULL_TREE,
4853 /*static_storage_p=*/true);
4854 /* Remember that the initialization for this variable has
4856 DECL_INITIALIZED_P (decl) = 1;
4857 /* The variable is being defined, so determine its
4859 determine_visibility (decl);
4861 /* If the variable has an array type, lay out the type, even if
4862 there is no initializer. It is valid to index through the
4863 array, and we must get TYPE_ALIGN set correctly on the array
4865 else if (TREE_CODE (type) == ARRAY_TYPE)
4869 /* Add this declaration to the statement-tree. This needs to happen
4870 after the call to check_initializer so that the DECL_EXPR for a
4871 reference temp is added before the DECL_EXPR for the reference itself. */
4872 if (at_function_scope_p ())
4873 add_decl_expr (decl);
4875 if (TREE_CODE (decl) == VAR_DECL)
4876 layout_var_decl (decl);
4878 /* Output the assembler code and/or RTL code for variables and functions,
4879 unless the type is an undefined structure or union.
4880 If not, it will get done when the type is completed. */
4881 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL)
4883 if (TREE_CODE (decl) == VAR_DECL)
4884 maybe_commonize_var (decl);
4886 make_rtl_for_nonlocal_decl (decl, init, asmspec);
4888 /* Check for abstractness of the type. Notice that there is no
4889 need to strip array types here since the check for those types
4890 is already done within create_array_type_for_decl. */
4891 if (TREE_CODE (type) == FUNCTION_TYPE
4892 || TREE_CODE (type) == METHOD_TYPE)
4893 abstract_virtuals_error (decl, TREE_TYPE (type));
4895 abstract_virtuals_error (decl, type);
4897 if (TREE_CODE (decl) == FUNCTION_DECL
4898 || TREE_TYPE (decl) == error_mark_node)
4899 /* No initialization required. */
4901 else if (DECL_EXTERNAL (decl)
4902 && ! (DECL_LANG_SPECIFIC (decl)
4903 && DECL_NOT_REALLY_EXTERN (decl)))
4906 DECL_INITIAL (decl) = init;
4910 /* A variable definition. */
4911 if (DECL_FUNCTION_SCOPE_P (decl))
4913 /* Initialize the local variable. */
4914 if (processing_template_decl)
4916 if (init || DECL_INITIAL (decl) == error_mark_node)
4917 DECL_INITIAL (decl) = init;
4919 else if (!TREE_STATIC (decl))
4920 initialize_local_var (decl, init);
4923 if (TREE_STATIC (decl))
4924 expand_static_init (decl, init);
4928 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
4929 reference, insert it in the statement-tree now. */
4931 push_cleanup (decl, cleanup, false);
4936 TREE_READONLY (decl) = 1;
4938 /* If this was marked 'used', be sure it will be output. */
4939 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
4940 mark_decl_referenced (decl);
4943 /* This is here for a midend callback from c-common.c. */
4946 finish_decl (tree decl, tree init, tree asmspec_tree)
4948 cp_finish_decl (decl, init, asmspec_tree, 0);
4951 /* Returns a declaration for a VAR_DECL as if:
4953 extern "C" TYPE NAME;
4955 had been seen. Used to create compiler-generated global
4959 declare_global_var (tree name, tree type)
4963 push_to_top_level ();
4964 decl = build_decl (VAR_DECL, name, type);
4965 TREE_PUBLIC (decl) = 1;
4966 DECL_EXTERNAL (decl) = 1;
4967 DECL_ARTIFICIAL (decl) = 1;
4969 cp_finish_decl (decl, NULL_TREE, NULL_TREE, 0);
4970 pop_from_top_level ();
4975 /* Returns a pointer to the `atexit' function. Note that if
4976 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
4977 `__cxa_atexit' function specified in the IA64 C++ ABI. */
4980 get_atexit_node (void)
4991 if (flag_use_cxa_atexit)
4993 /* The declaration for `__cxa_atexit' is:
4995 int __cxa_atexit (void (*)(void *), void *, void *)
4997 We build up the argument types and then then function type
5000 /* First, build the pointer-to-function type for the first
5002 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5003 fn_type = build_function_type (void_type_node, arg_types);
5004 fn_ptr_type = build_pointer_type (fn_type);
5005 /* Then, build the rest of the argument types. */
5006 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5007 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5008 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5009 /* And the final __cxa_atexit type. */
5010 fn_type = build_function_type (integer_type_node, arg_types);
5011 fn_ptr_type = build_pointer_type (fn_type);
5012 name = "__cxa_atexit";
5016 /* The declaration for `atexit' is:
5018 int atexit (void (*)());
5020 We build up the argument types and then then function type
5022 fn_type = build_function_type (void_type_node, void_list_node);
5023 fn_ptr_type = build_pointer_type (fn_type);
5024 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5025 /* Build the final atexit type. */
5026 fn_type = build_function_type (integer_type_node, arg_types);
5030 /* Now, build the function declaration. */
5031 push_lang_context (lang_name_c);
5032 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5033 mark_used (atexit_fndecl);
5034 pop_lang_context ();
5035 atexit_node = decay_conversion (atexit_fndecl);
5040 /* Returns the __dso_handle VAR_DECL. */
5043 get_dso_handle_node (void)
5045 if (dso_handle_node)
5046 return dso_handle_node;
5048 /* Declare the variable. */
5049 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5052 return dso_handle_node;
5055 /* Begin a new function with internal linkage whose job will be simply
5056 to destroy some particular variable. */
5058 static GTY(()) int start_cleanup_cnt;
5061 start_cleanup_fn (void)
5068 push_to_top_level ();
5070 /* No need to mangle this. */
5071 push_lang_context (lang_name_c);
5073 /* Build the parameter-types. */
5074 parmtypes = void_list_node;
5075 /* Functions passed to __cxa_atexit take an additional parameter.
5076 We'll just ignore it. After we implement the new calling
5077 convention for destructors, we can eliminate the use of
5078 additional cleanup functions entirely in the -fnew-abi case. */
5079 if (flag_use_cxa_atexit)
5080 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5081 /* Build the function type itself. */
5082 fntype = build_function_type (void_type_node, parmtypes);
5083 /* Build the name of the function. */
5084 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5085 /* Build the function declaration. */
5086 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5087 /* It's a function with internal linkage, generated by the
5089 TREE_PUBLIC (fndecl) = 0;
5090 DECL_ARTIFICIAL (fndecl) = 1;
5091 /* Make the function `inline' so that it is only emitted if it is
5092 actually needed. It is unlikely that it will be inlined, since
5093 it is only called via a function pointer, but we avoid unnecessary
5094 emissions this way. */
5095 DECL_INLINE (fndecl) = 1;
5096 DECL_DECLARED_INLINE_P (fndecl) = 1;
5097 DECL_INTERFACE_KNOWN (fndecl) = 1;
5098 /* Build the parameter. */
5099 if (flag_use_cxa_atexit)
5103 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5104 DECL_CONTEXT (parmdecl) = fndecl;
5105 TREE_USED (parmdecl) = 1;
5106 DECL_ARGUMENTS (fndecl) = parmdecl;
5110 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5112 pop_lang_context ();
5114 return current_function_decl;
5117 /* Finish the cleanup function begun by start_cleanup_fn. */
5120 end_cleanup_fn (void)
5122 expand_or_defer_fn (finish_function (0));
5124 pop_from_top_level ();
5127 /* Generate code to handle the destruction of DECL, an object with
5128 static storage duration. */
5131 register_dtor_fn (tree decl)
5138 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5139 return void_zero_node;
5141 /* Call build_cleanup before we enter the anonymous function so that
5142 any access checks will be done relative to the current scope,
5143 rather than the scope of the anonymous function. */
5144 build_cleanup (decl);
5146 /* Now start the function. */
5147 cleanup = start_cleanup_fn ();
5149 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5150 to the original function, rather than the anonymous one. That
5151 will make the back-end think that nested functions are in use,
5152 which causes confusion. */
5154 push_deferring_access_checks (dk_no_check);
5155 fcall = build_cleanup (decl);
5156 pop_deferring_access_checks ();
5158 /* Create the body of the anonymous function. */
5159 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5160 finish_expr_stmt (fcall);
5161 finish_compound_stmt (compound_stmt);
5164 /* Call atexit with the cleanup function. */
5165 cxx_mark_addressable (cleanup);
5166 mark_used (cleanup);
5167 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5168 if (flag_use_cxa_atexit)
5170 args = tree_cons (NULL_TREE,
5171 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5173 args = tree_cons (NULL_TREE, null_pointer_node, args);
5174 args = tree_cons (NULL_TREE, cleanup, args);
5177 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5178 return build_function_call (get_atexit_node (), args);
5181 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5182 is its initializer. Generate code to handle the construction
5183 and destruction of DECL. */
5186 expand_static_init (tree decl, tree init)
5188 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5189 gcc_assert (TREE_STATIC (decl));
5191 /* Some variables require no initialization. */
5193 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5194 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5197 if (DECL_FUNCTION_SCOPE_P (decl))
5199 /* Emit code to perform this initialization but once. */
5200 tree if_stmt, inner_if_stmt = NULL_TREE;
5201 tree then_clause, inner_then_clause = NULL_TREE;
5202 tree guard, guard_addr, guard_addr_list;
5203 tree acquire_fn, release_fn, abort_fn;
5206 /* Emit code to perform this initialization but once. This code
5209 static <type> guard;
5210 if (!guard.first_byte) {
5211 if (__cxa_guard_acquire (&guard)) {
5214 // Do initialization.
5215 flag = true; __cxa_guard_release (&guard);
5216 // Register variable for destruction at end of program.
5218 if (!flag) __cxa_guard_abort (&guard);
5222 Note that the `flag' variable is only set to 1 *after* the
5223 initialization is complete. This ensures that an exception,
5224 thrown during the construction, will cause the variable to
5225 reinitialized when we pass through this code again, as per:
5229 If the initialization exits by throwing an exception, the
5230 initialization is not complete, so it will be tried again
5231 the next time control enters the declaration.
5233 This process should be thread-safe, too; multiple threads
5234 should not be able to initialize the variable more than
5237 /* Create the guard variable. */
5238 guard = get_guard (decl);
5240 /* Begin the conditional initialization. */
5241 if_stmt = begin_if_stmt ();
5242 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5243 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5245 if (flag_threadsafe_statics)
5247 guard_addr = build_address (guard);
5248 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5250 acquire_fn = get_identifier ("__cxa_guard_acquire");
5251 release_fn = get_identifier ("__cxa_guard_release");
5252 abort_fn = get_identifier ("__cxa_guard_abort");
5253 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5255 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5257 tree vfntype = build_function_type (void_type_node, argtypes);
5258 acquire_fn = push_library_fn
5259 (acquire_fn, build_function_type (integer_type_node, argtypes));
5260 release_fn = push_library_fn (release_fn, vfntype);
5261 abort_fn = push_library_fn (abort_fn, vfntype);
5265 release_fn = identifier_global_value (release_fn);
5266 abort_fn = identifier_global_value (abort_fn);
5269 inner_if_stmt = begin_if_stmt ();
5270 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5273 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5274 begin = get_target_expr (boolean_false_node);
5275 flag = TARGET_EXPR_SLOT (begin);
5277 TARGET_EXPR_CLEANUP (begin)
5278 = build (COND_EXPR, void_type_node, flag,
5280 build_call (abort_fn, guard_addr_list));
5281 CLEANUP_EH_ONLY (begin) = 1;
5283 /* Do the initialization itself. */
5284 init = add_stmt_to_compound (begin, init);
5285 init = add_stmt_to_compound
5286 (init, build (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5287 init = add_stmt_to_compound
5288 (init, build_call (release_fn, guard_addr_list));
5291 init = add_stmt_to_compound (init, set_guard (guard));
5293 /* Use atexit to register a function for destroying this static
5295 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5297 finish_expr_stmt (init);
5299 if (flag_threadsafe_statics)
5301 finish_compound_stmt (inner_then_clause);
5302 finish_then_clause (inner_if_stmt);
5303 finish_if_stmt (inner_if_stmt);
5306 finish_compound_stmt (then_clause);
5307 finish_then_clause (if_stmt);
5308 finish_if_stmt (if_stmt);
5311 static_aggregates = tree_cons (init, decl, static_aggregates);
5315 /* Make TYPE a complete type based on INITIAL_VALUE.
5316 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5317 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5320 complete_array_type (tree type, tree initial_value, int do_default)
5322 tree maxindex = NULL_TREE;
5327 /* An array of character type can be initialized from a
5328 brace-enclosed string constant. */
5329 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
5330 && TREE_CODE (initial_value) == CONSTRUCTOR
5331 && CONSTRUCTOR_ELTS (initial_value)
5332 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value)))
5334 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value)) == NULL_TREE)
5335 initial_value = TREE_VALUE (CONSTRUCTOR_ELTS (initial_value));
5337 /* Note MAXINDEX is really the maximum index, one less than the
5339 if (TREE_CODE (initial_value) == STRING_CST)
5342 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
5343 maxindex = build_int_cst (NULL_TREE,
5344 (TREE_STRING_LENGTH (initial_value)
5347 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
5349 tree elts = CONSTRUCTOR_ELTS (initial_value);
5351 maxindex = ssize_int (-1);
5352 for (; elts; elts = TREE_CHAIN (elts))
5354 if (TREE_PURPOSE (elts))
5355 maxindex = TREE_PURPOSE (elts);
5357 maxindex = size_binop (PLUS_EXPR, maxindex, ssize_int (1));
5362 /* Make an error message unless that happened already. */
5363 if (initial_value != error_mark_node)
5366 initial_value = NULL_TREE;
5368 /* Prevent further error messages. */
5369 maxindex = build_int_cst (NULL_TREE, 0);
5376 maxindex = build_int_cst (NULL_TREE, 0);
5386 domain = build_index_type (maxindex);
5387 TYPE_DOMAIN (type) = domain;
5390 itype = TREE_TYPE (initial_value);
5393 if (itype && !TYPE_DOMAIN (itype))
5394 TYPE_DOMAIN (itype) = domain;
5395 /* The type of the main variant should never be used for arrays
5396 of different sizes. It should only ever be completed with the
5397 size of the array. */
5398 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
5399 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
5401 elt_type = TREE_TYPE (type);
5402 TYPE_NEEDS_CONSTRUCTING (type)
5403 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type));
5404 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5405 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type));
5408 /* Lay out the type now that we can get the real answer. */
5415 /* Return zero if something is declared to be a member of type
5416 CTYPE when in the context of CUR_TYPE. STRING is the error
5417 message to print in that case. Otherwise, quietly return 1. */
5420 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5422 if (ctype && ctype != cur_type)
5424 if (flags == DTOR_FLAG)
5425 error ("destructor for alien class `%T' cannot be a member",
5428 error ("constructor for alien class `%T' cannot be a member",
5435 /* Subroutine of `grokdeclarator'. */
5437 /* Generate errors possibly applicable for a given set of specifiers.
5438 This is for ARM $7.1.2. */
5441 bad_specifiers (tree object,
5450 error ("`%D' declared as a `virtual' %s", object, type);
5452 error ("`%D' declared as an `inline' %s", object, type);
5454 error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
5457 cp_error_at ("`%D' declared as a friend", object);
5459 && (TREE_CODE (object) == TYPE_DECL
5460 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5461 && !TYPE_REFFN_P (TREE_TYPE (object))
5462 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5463 cp_error_at ("`%D' declared with an exception specification", object);
5466 /* CTYPE is class type, or null if non-class.
5467 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5469 DECLARATOR is the function's name.
5470 PARMS is a chain of PARM_DECLs for the function.
5471 VIRTUALP is truthvalue of whether the function is virtual or not.
5472 FLAGS are to be passed through to `grokclassfn'.
5473 QUALS are qualifiers indicating whether the function is `const'
5475 RAISES is a list of exceptions that this function can raise.
5476 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5477 not look, and -1 if we should not call `grokclassfn' at all.
5479 Returns `NULL_TREE' if something goes wrong, after issuing
5480 applicable error messages. */
5483 grokfndecl (tree ctype,
5487 tree orig_declarator,
5489 enum overload_flags flags,
5501 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5502 int has_default_arg = 0;
5506 type = build_exception_variant (type, raises);
5508 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5509 DECL_ARGUMENTS (decl) = parms;
5510 /* Propagate volatile out from type to decl. */
5511 if (TYPE_VOLATILE (type))
5512 TREE_THIS_VOLATILE (decl) = 1;
5514 /* If this decl has namespace scope, set that up. */
5516 set_decl_namespace (decl, in_namespace, friendp);
5518 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5520 /* `main' and builtins have implicit 'C' linkage. */
5521 if ((MAIN_NAME_P (declarator)
5522 || (IDENTIFIER_LENGTH (declarator) > 10
5523 && IDENTIFIER_POINTER (declarator)[0] == '_'
5524 && IDENTIFIER_POINTER (declarator)[1] == '_'
5525 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5526 && current_lang_name == lang_name_cplusplus
5527 && ctype == NULL_TREE
5528 /* NULL_TREE means global namespace. */
5529 && DECL_CONTEXT (decl) == NULL_TREE)
5530 SET_DECL_LANGUAGE (decl, lang_c);
5532 /* Should probably propagate const out from type to decl I bet (mrs). */
5535 DECL_STATIC_FUNCTION_P (decl) = 1;
5536 DECL_CONTEXT (decl) = ctype;
5540 DECL_CONTEXT (decl) = ctype;
5542 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
5544 if (processing_template_decl)
5545 error ("cannot declare `::main' to be a template");
5547 error ("cannot declare `::main' to be inline");
5549 error ("cannot declare `::main' to be static");
5550 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
5552 error ("`main' must return `int'");
5557 /* Members of anonymous types and local classes have no linkage; make
5558 them internal. If a typedef is made later, this will be changed. */
5559 if (ctype && (TYPE_ANONYMOUS_P (ctype)
5560 || decl_function_context (TYPE_MAIN_DECL (ctype))))
5565 /* [basic.link]: A name with no linkage (notably, the name of a class
5566 or enumeration declared in a local scope) shall not be used to
5567 declare an entity with linkage.
5569 Only check this for public decls for now. See core 319, 389. */
5570 t = no_linkage_check (TREE_TYPE (decl),
5571 /*relaxed_p=*/false);
5574 if (TYPE_ANONYMOUS_P (t))
5576 if (DECL_EXTERN_C_P (decl))
5577 /* Allow this; it's pretty common in C. */;
5580 pedwarn ("non-local function `%#D' uses anonymous type",
5582 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5584 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5589 pedwarn ("non-local function `%#D' uses local type `%T'",
5594 TREE_PUBLIC (decl) = publicp;
5597 DECL_INTERFACE_KNOWN (decl) = 1;
5598 DECL_NOT_REALLY_EXTERN (decl) = 1;
5601 /* If the declaration was declared inline, mark it as such. */
5603 DECL_DECLARED_INLINE_P (decl) = 1;
5604 /* We inline functions that are explicitly declared inline, or, when
5605 the user explicitly asks us to, all functions. */
5606 if (DECL_DECLARED_INLINE_P (decl)
5607 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
5608 DECL_INLINE (decl) = 1;
5610 DECL_EXTERNAL (decl) = 1;
5611 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
5613 error ("%smember function `%D' cannot have cv-qualifier",
5614 (ctype ? "static " : "non-"), decl);
5615 quals = TYPE_UNQUALIFIED;
5618 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
5619 grok_op_properties (decl, friendp, /*complain=*/true);
5621 if (ctype && decl_function_context (decl))
5622 DECL_NO_STATIC_CHAIN (decl) = 1;
5624 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5625 if (TREE_PURPOSE (t)
5626 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5628 has_default_arg = 1;
5633 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5637 ("defining explicit specialization `%D' in friend declaration",
5641 tree fns = TREE_OPERAND (orig_declarator, 0);
5642 tree args = TREE_OPERAND (orig_declarator, 1);
5644 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5646 /* Something like `template <class T> friend void f<T>()'. */
5647 error ("invalid use of template-id `%D' in declaration of primary template",
5653 /* A friend declaration of the form friend void f<>(). Record
5654 the information in the TEMPLATE_ID_EXPR. */
5655 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5657 if (TREE_CODE (fns) == COMPONENT_REF)
5659 /* Due to bison parser ickiness, we will have already looked
5660 up an operator_name or PFUNCNAME within the current class
5661 (see template_id in parse.y). If the current class contains
5662 such a name, we'll get a COMPONENT_REF here. Undo that. */
5664 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5665 == current_class_type);
5666 fns = TREE_OPERAND (fns, 1);
5668 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5669 || TREE_CODE (fns) == OVERLOAD);
5670 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5672 if (has_default_arg)
5674 error ("default arguments are not allowed in declaration of friend template specialization `%D'",
5681 error ("`inline' is not allowed in declaration of friend template specialization `%D'",
5689 /* Make the init_value nonzero so pushdecl knows this is not
5690 tentative. error_mark_node is replaced later with the BLOCK. */
5691 DECL_INITIAL (decl) = error_mark_node;
5693 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
5694 TREE_NOTHROW (decl) = 1;
5696 /* Caller will do the rest of this. */
5700 if (flags == NO_SPECIAL && ctype && constructor_name_p (declarator, ctype))
5701 DECL_CONSTRUCTOR_P (decl) = 1;
5703 /* Function gets the ugly name, field gets the nice one. This call
5704 may change the type of the function (because of default
5706 if (ctype != NULL_TREE)
5707 grokclassfn (ctype, decl, flags, quals);
5709 decl = check_explicit_specialization (orig_declarator, decl,
5711 2 * (funcdef_flag != 0) +
5712 4 * (friendp != 0));
5713 if (decl == error_mark_node)
5716 if (ctype != NULL_TREE
5717 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
5722 old_decl = check_classfn (ctype, decl,
5723 (processing_template_decl
5724 > template_class_depth (ctype))
5725 ? current_template_parms
5728 if (old_decl && TREE_CODE (old_decl) == TEMPLATE_DECL)
5729 /* Because grokfndecl is always supposed to return a
5730 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5731 here. We depend on our callers to figure out that its
5732 really a template that's being returned. */
5733 old_decl = DECL_TEMPLATE_RESULT (old_decl);
5735 if (old_decl && DECL_STATIC_FUNCTION_P (old_decl)
5736 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
5737 /* Remove the `this' parm added by grokclassfn.
5738 XXX Isn't this done in start_function, too? */
5739 revert_static_member_fn (decl);
5740 if (old_decl && DECL_ARTIFICIAL (old_decl))
5741 error ("definition of implicitly-declared `%D'", old_decl);
5748 /* Since we've smashed OLD_DECL to its
5749 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5750 if (TREE_CODE (decl) == TEMPLATE_DECL)
5751 decl = DECL_TEMPLATE_RESULT (decl);
5753 /* Attempt to merge the declarations. This can fail, in
5754 the case of some invalid specialization declarations. */
5755 pop_p = push_scope (ctype);
5756 ok = duplicate_decls (decl, old_decl);
5761 error ("no `%#D' member function declared in class `%T'",
5769 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
5772 if (ctype == NULL_TREE || check)
5776 DECL_VIRTUAL_P (decl) = 1;
5781 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
5782 the linkage that DECL will receive in the object file. */
5785 set_linkage_for_static_data_member (tree decl)
5787 /* A static data member always has static storage duration and
5788 external linkage. Note that static data members are forbidden in
5789 local classes -- the only situation in which a class has
5790 non-external linkage. */
5791 TREE_PUBLIC (decl) = 1;
5792 TREE_STATIC (decl) = 1;
5793 /* For non-template classes, static data members are always put
5794 out in exactly those files where they are defined, just as
5795 with ordinary namespace-scope variables. */
5796 if (!processing_template_decl)
5797 DECL_INTERFACE_KNOWN (decl) = 1;
5800 /* Create a VAR_DECL named NAME with the indicated TYPE.
5802 If SCOPE is non-NULL, it is the class type or namespace containing
5803 the variable. If SCOPE is NULL, the variable should is created in
5804 the innermost enclosings scope. */
5807 grokvardecl (tree type,
5809 const cp_decl_specifier_seq *declspecs,
5816 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
5818 /* Compute the scope in which to place the variable. */
5821 /* An explicit "extern" specifier indicates a namespace-scope
5823 if (declspecs->storage_class == sc_extern)
5824 scope = current_namespace;
5825 else if (!at_function_scope_p ())
5827 scope = current_scope ();
5829 scope = current_namespace;
5834 && (/* If the variable is a namespace-scope variable declared in a
5835 template, we need DECL_LANG_SPECIFIC. */
5836 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
5837 /* Similarly for namespace-scope variables with language linkage
5839 || (TREE_CODE (scope) == NAMESPACE_DECL
5840 && current_lang_name != lang_name_cplusplus)
5841 /* Similarly for static data members. */
5843 decl = build_lang_decl (VAR_DECL, name, type);
5845 decl = build_decl (VAR_DECL, name, type);
5847 if (scope && TREE_CODE (scope) == NAMESPACE_DECL)
5848 set_decl_namespace (decl, scope, 0);
5850 DECL_CONTEXT (decl) = scope;
5852 if (declspecs->storage_class == sc_extern)
5854 DECL_THIS_EXTERN (decl) = 1;
5855 DECL_EXTERNAL (decl) = !initialized;
5858 if (DECL_CLASS_SCOPE_P (decl))
5860 set_linkage_for_static_data_member (decl);
5861 /* This function is only called with out-of-class definitions. */
5862 DECL_EXTERNAL (decl) = 0;
5864 /* At top level, either `static' or no s.c. makes a definition
5865 (perhaps tentative), and absence of `static' makes it public. */
5866 else if (toplevel_bindings_p ())
5868 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
5869 && (DECL_THIS_EXTERN (decl) || ! constp));
5870 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
5872 /* Not at top level, only `static' makes a static definition. */
5875 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
5876 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
5879 if (declspecs->specs[(int)ds_thread])
5881 if (targetm.have_tls)
5882 DECL_THREAD_LOCAL (decl) = 1;
5884 /* A mere warning is sure to result in improper semantics
5885 at runtime. Don't bother to allow this to compile. */
5886 error ("thread-local storage not supported for this target");
5889 if (TREE_PUBLIC (decl))
5891 /* [basic.link]: A name with no linkage (notably, the name of a class
5892 or enumeration declared in a local scope) shall not be used to
5893 declare an entity with linkage.
5895 Only check this for public decls for now. */
5896 tree t = no_linkage_check (TREE_TYPE (decl),
5897 /*relaxed_p=*/false);
5900 if (TYPE_ANONYMOUS_P (t))
5902 if (DECL_EXTERN_C_P (decl))
5903 /* Allow this; it's pretty common in C. */;
5906 pedwarn ("non-local variable `%#D' uses anonymous type",
5908 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5910 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5915 pedwarn ("non-local variable `%#D' uses local type `%T'",
5923 /* Create and return a canonical pointer to member function type, for
5924 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
5927 build_ptrmemfunc_type (tree type)
5931 tree unqualified_variant = NULL_TREE;
5933 if (type == error_mark_node)
5936 /* If a canonical type already exists for this type, use it. We use
5937 this method instead of type_hash_canon, because it only does a
5938 simple equality check on the list of field members. */
5940 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
5943 /* Make sure that we always have the unqualified pointer-to-member
5945 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
5947 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
5949 t = make_aggr_type (RECORD_TYPE);
5950 xref_basetypes (t, NULL_TREE);
5952 /* Let the front-end know this is a pointer to member function... */
5953 TYPE_PTRMEMFUNC_FLAG (t) = 1;
5954 /* ... and not really an aggregate. */
5955 SET_IS_AGGR_TYPE (t, 0);
5957 field = build_decl (FIELD_DECL, pfn_identifier, type);
5960 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
5961 TREE_CHAIN (field) = fields;
5964 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
5966 /* Zap out the name so that the back-end will give us the debugging
5967 information for this anonymous RECORD_TYPE. */
5968 TYPE_NAME (t) = NULL_TREE;
5970 /* If this is not the unqualified form of this pointer-to-member
5971 type, set the TYPE_MAIN_VARIANT for this type to be the
5972 unqualified type. Since they are actually RECORD_TYPEs that are
5973 not variants of each other, we must do this manually. */
5974 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
5976 t = build_qualified_type (t, cp_type_quals (type));
5977 TYPE_MAIN_VARIANT (t) = unqualified_variant;
5978 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
5979 TYPE_NEXT_VARIANT (unqualified_variant) = t;
5982 /* Cache this pointer-to-member type so that we can find it again
5984 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
5989 /* Create and return a pointer to data member type. */
5992 build_ptrmem_type (tree class_type, tree member_type)
5994 if (TREE_CODE (member_type) == METHOD_TYPE)
5998 arg_types = TYPE_ARG_TYPES (member_type);
5999 class_type = (cp_build_qualified_type
6001 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6003 = build_method_type_directly (class_type,
6004 TREE_TYPE (member_type),
6005 TREE_CHAIN (arg_types));
6006 return build_ptrmemfunc_type (build_pointer_type (member_type));
6010 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6011 return build_offset_type (class_type, member_type);
6015 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6016 Check to see that the definition is valid. Issue appropriate error
6017 messages. Return 1 if the definition is particularly bad, or 0
6021 check_static_variable_definition (tree decl, tree type)
6023 /* Motion 10 at San Diego: If a static const integral data member is
6024 initialized with an integral constant expression, the initializer
6025 may appear either in the declaration (within the class), or in
6026 the definition, but not both. If it appears in the class, the
6027 member is a member constant. The file-scope definition is always
6029 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6031 error ("invalid in-class initialization of static data member of non-integral type `%T'",
6033 /* If we just return the declaration, crashes will sometimes
6034 occur. We therefore return void_type_node, as if this were a
6035 friend declaration, to cause callers to completely ignore
6036 this declaration. */
6039 else if (!CP_TYPE_CONST_P (type))
6040 error ("ISO C++ forbids in-class initialization of non-const static member `%D'",
6042 else if (pedantic && !INTEGRAL_TYPE_P (type))
6043 pedwarn ("ISO C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl, type);
6048 /* Given the SIZE (i.e., number of elements) in an array, compute an
6049 appropriate index type for the array. If non-NULL, NAME is the
6050 name of the thing being declared. */
6053 compute_array_index_type (tree name, tree size)
6055 tree type = TREE_TYPE (size);
6058 /* The array bound must be an integer type. */
6059 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6062 error ("size of array `%D' has non-integral type `%T'", name, type);
6064 error ("size of array has non-integral type `%T'", type);
6065 size = integer_one_node;
6066 type = TREE_TYPE (size);
6069 if (abi_version_at_least (2)
6070 /* We should only handle value dependent expressions specially. */
6071 ? value_dependent_expression_p (size)
6072 /* But for abi-1, we handled all instances in templates. This
6073 effects the manglings produced. */
6074 : processing_template_decl)
6075 return build_index_type (build_min (MINUS_EXPR, sizetype,
6076 size, integer_one_node));
6078 /* The size might be the result of a cast. */
6079 STRIP_TYPE_NOPS (size);
6081 /* It might be a const variable or enumeration constant. */
6082 size = decl_constant_value (size);
6084 /* Normally, the array-bound will be a constant. */
6085 if (TREE_CODE (size) == INTEGER_CST)
6087 /* Check to see if the array bound overflowed. Make that an
6088 error, no matter how generous we're being. */
6089 int old_flag_pedantic_errors = flag_pedantic_errors;
6090 int old_pedantic = pedantic;
6091 pedantic = flag_pedantic_errors = 1;
6092 constant_expression_warning (size);
6093 pedantic = old_pedantic;
6094 flag_pedantic_errors = old_flag_pedantic_errors;
6096 /* An array must have a positive number of elements. */
6097 if (INT_CST_LT (size, integer_zero_node))
6100 error ("size of array `%D' is negative", name);
6102 error ("size of array is negative");
6103 size = integer_one_node;
6105 /* As an extension we allow zero-sized arrays. We always allow
6106 them in system headers because glibc uses them. */
6107 else if (integer_zerop (size) && pedantic && !in_system_header)
6110 pedwarn ("ISO C++ forbids zero-size array `%D'", name);
6112 pedwarn ("ISO C++ forbids zero-size array");
6115 else if (TREE_CONSTANT (size))
6117 /* `(int) &fn' is not a valid array bound. */
6119 error ("size of array `%D' is not an integral constant-expression",
6122 error ("size of array is not an integral constant-expression");
6127 pedwarn ("ISO C++ forbids variable-size array `%D'", name);
6129 pedwarn ("ISO C++ forbids variable-size array");
6132 if (processing_template_decl && !TREE_CONSTANT (size))
6133 /* A variable sized array. */
6134 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6137 /* Compute the index of the largest element in the array. It is
6138 one less than the number of elements in the array. */
6140 = fold (cp_build_binary_op (MINUS_EXPR,
6141 cp_convert (ssizetype, size),
6142 cp_convert (ssizetype, integer_one_node)));
6143 if (!TREE_CONSTANT (itype))
6144 /* A variable sized array. */
6145 itype = variable_size (itype);
6146 /* Make sure that there was no overflow when creating to a signed
6147 index type. (For example, on a 32-bit machine, an array with
6148 size 2^32 - 1 is too big.) */
6149 else if (TREE_OVERFLOW (itype))
6151 error ("overflow in array dimension");
6152 TREE_OVERFLOW (itype) = 0;
6156 /* Create and return the appropriate index type. */
6157 return build_index_type (itype);
6160 /* Returns the scope (if any) in which the entity declared by
6161 DECLARATOR will be located. If the entity was declared with an
6162 unqualified name, NULL_TREE is returned. */
6165 get_scope_of_declarator (const cp_declarator *declarator)
6167 while (declarator && declarator->kind != cdk_id)
6168 declarator = declarator->declarator;
6170 /* If the declarator-id is a SCOPE_REF, the scope in which the
6171 declaration occurs is the first operand. */
6173 && declarator->u.id.name
6174 && TREE_CODE (declarator->u.id.name) == SCOPE_REF)
6175 return TREE_OPERAND (declarator->u.id.name, 0);
6177 /* Otherwise, the declarator is not a qualified name; the entity will
6178 be declared in the current scope. */
6182 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6183 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6187 create_array_type_for_decl (tree name, tree type, tree size)
6189 tree itype = NULL_TREE;
6190 const char* error_msg;
6192 /* If things have already gone awry, bail now. */
6193 if (type == error_mark_node || size == error_mark_node)
6194 return error_mark_node;
6196 /* Assume that everything will go OK. */
6199 /* There are some types which cannot be array elements. */
6200 switch (TREE_CODE (type))
6203 error_msg = "array of void";
6207 error_msg = "array of functions";
6210 case REFERENCE_TYPE:
6211 error_msg = "array of references";
6215 error_msg = "array of function members";
6222 /* If something went wrong, issue an error-message and return. */
6226 error ("declaration of `%D' as %s", name, error_msg);
6228 error ("creating %s", error_msg);
6230 return error_mark_node;
6235 The constant expressions that specify the bounds of the arrays
6236 can be omitted only for the first member of the sequence. */
6237 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6240 error ("declaration of `%D' as multidimensional array must have bounds for all dimensions except the first",
6243 error ("multidimensional array must have bounds for all dimensions except the first");
6245 return error_mark_node;
6248 /* Figure out the index type for the array. */
6250 itype = compute_array_index_type (name, size);
6253 T is called the array element type; this type shall not be [...] an
6254 abstract class type. */
6255 abstract_virtuals_error (name, type);
6257 return build_cplus_array_type (type, itype);
6260 /* Check that it's OK to declare a function with the indicated TYPE.
6261 SFK indicates the kind of special function (if any) that this
6262 function is. OPTYPE is the type given in a conversion operator
6263 declaration, or the class type for a constructor/destructor.
6264 Returns the actual return type of the function; that
6265 may be different than TYPE if an error occurs, or for certain
6266 special functions. */
6269 check_special_function_return_type (special_function_kind sfk,
6275 case sfk_constructor:
6277 error ("return type specification for constructor invalid");
6279 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6280 type = build_pointer_type (optype);
6282 type = void_type_node;
6285 case sfk_destructor:
6287 error ("return type specification for destructor invalid");
6288 /* We can't use the proper return type here because we run into
6289 problems with ambiguous bases and covariant returns.
6290 Java classes are left unchanged because (void *) isn't a valid
6291 Java type, and we don't want to change the Java ABI. */
6292 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6293 type = build_pointer_type (void_type_node);
6295 type = void_type_node;
6298 case sfk_conversion:
6299 if (type && !same_type_p (type, optype))
6300 error ("operator `%T' declared to return `%T'", optype, type);
6302 pedwarn ("return type specified for `operator %T'", optype);
6313 /* Given declspecs and a declarator (abstract or otherwise), determine
6314 the name and type of the object declared and construct a DECL node
6317 DECLSPECS is a chain of tree_list nodes whose value fields
6318 are the storage classes and type specifiers.
6320 DECL_CONTEXT says which syntactic context this declaration is in:
6321 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6322 FUNCDEF for a function definition. Like NORMAL but a few different
6323 error messages in each case. Return value may be zero meaning
6324 this definition is too screwy to try to parse.
6325 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6326 handle member functions (which have FIELD context).
6327 Return value may be zero meaning this definition is too screwy to
6329 PARM for a parameter declaration (either within a function prototype
6330 or before a function body). Make a PARM_DECL, or return void_type_node.
6331 CATCHPARM for a parameter declaration before a catch clause.
6332 TYPENAME if for a typename (in a cast or sizeof).
6333 Don't make a DECL node; just return the ..._TYPE node.
6334 FIELD for a struct or union field; make a FIELD_DECL.
6335 BITFIELD for a field with specified width.
6336 INITIALIZED is 1 if the decl has an initializer.
6338 ATTRLIST is a pointer to the list of attributes, which may be NULL
6339 if there are none; *ATTRLIST may be modified if attributes from inside
6340 the declarator should be applied to the declaration.
6342 When this function is called, scoping variables (such as
6343 CURRENT_CLASS_TYPE) should reflect the scope in which the
6344 declaration occurs, not the scope in which the new declaration will
6345 be placed. For example, on:
6349 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6350 should not be `S'. */
6353 grokdeclarator (const cp_declarator *declarator,
6354 const cp_decl_specifier_seq *declspecs,
6355 enum decl_context decl_context,
6359 tree type = NULL_TREE;
6362 int virtualp, explicitp, friendp, inlinep, staticp;
6363 int explicit_int = 0;
6364 int explicit_char = 0;
6365 int defaulted_int = 0;
6366 tree dependant_name = NULL_TREE;
6368 tree typedef_decl = NULL_TREE;
6369 const char *name = NULL;
6370 tree typedef_type = NULL_TREE;
6371 int funcdef_flag = 0;
6372 cp_declarator_kind innermost_code = cdk_error;
6375 /* See the code below that used this. */
6376 tree decl_attr = NULL_TREE;
6379 /* Keep track of what sort of function is being processed
6380 so that we can warn about default return values, or explicit
6381 return values which do not match prescribed defaults. */
6382 special_function_kind sfk = sfk_none;
6384 tree dname = NULL_TREE;
6385 tree ctor_return_type = NULL_TREE;
6386 enum overload_flags flags = NO_SPECIAL;
6387 cp_cv_quals quals = TYPE_UNQUALIFIED;
6388 tree raises = NULL_TREE;
6389 int template_count = 0;
6390 tree returned_attrs = NULL_TREE;
6391 tree parms = NULL_TREE;
6392 const cp_declarator *id_declarator;
6393 /* The unqualified name of the declarator; either an
6394 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6395 tree unqualified_id;
6396 /* The class type, if any, in which this entity is located,
6397 or NULL_TREE if none. Note that this value may be different from
6398 the current class type; for example if an attempt is made to declare
6399 "A::f" inside "B", this value will be "A". */
6400 tree ctype = current_class_type;
6401 /* The NAMESPACE_DECL for the namespace in which this entity is
6402 located. If an unqualified name is used to declare the entity,
6403 this value will be NULL_TREE, even if the entity is located at
6405 tree in_namespace = NULL_TREE;
6407 cp_storage_class storage_class;
6408 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6410 signed_p = declspecs->specs[(int)ds_signed];
6411 unsigned_p = declspecs->specs[(int)ds_unsigned];
6412 short_p = declspecs->specs[(int)ds_short];
6413 long_p = declspecs->specs[(int)ds_long];
6414 thread_p = declspecs->specs[(int)ds_thread];
6416 if (decl_context == FUNCDEF)
6417 funcdef_flag = 1, decl_context = NORMAL;
6418 else if (decl_context == MEMFUNCDEF)
6419 funcdef_flag = -1, decl_context = FIELD;
6420 else if (decl_context == BITFIELD)
6421 bitfield = 1, decl_context = FIELD;
6423 /* Look inside a declarator for the name being declared
6424 and get it as a string, for an error message. */
6425 for (id_declarator = declarator;
6427 id_declarator = id_declarator->declarator)
6429 if (id_declarator->kind != cdk_id)
6430 innermost_code = id_declarator->kind;
6432 switch (id_declarator->kind)
6435 if (id_declarator->declarator
6436 && id_declarator->declarator->kind == cdk_id)
6438 sfk = id_declarator->declarator->u.id.sfk;
6439 if (sfk == sfk_destructor)
6446 tree decl = id_declarator->u.id.name;
6449 if (TREE_CODE (decl) == SCOPE_REF)
6451 tree qualifying_scope = TREE_OPERAND (decl, 0);
6453 /* It is valid to write:
6455 class C { void f(); };
6459 The standard is not clear about whether `typedef const C D' is
6460 legal; as of 2002-09-15 the committee is considering
6461 that question. EDG 3.0 allows that syntax.
6462 Therefore, we do as well. */
6463 if (qualifying_scope && TYPE_P (qualifying_scope))
6465 ctype = TYPE_MAIN_VARIANT (qualifying_scope);
6466 if (innermost_code != cdk_function
6467 && current_class_type
6468 && !UNIQUELY_DERIVED_FROM_P (ctype,
6469 current_class_type))
6471 error ("type `%T' is not derived from type `%T'",
6472 ctype, current_class_type);
6475 TREE_OPERAND (decl, 0) = ctype;
6477 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6478 in_namespace = qualifying_scope;
6479 decl = TREE_OPERAND (decl, 1);
6481 if (TREE_CODE (decl) == BASELINK)
6482 decl = BASELINK_FUNCTIONS (decl);
6483 if (decl == error_mark_node)
6484 return error_mark_node;
6485 switch (TREE_CODE (decl))
6489 tree type = TREE_OPERAND (decl, 0);
6490 type = constructor_name (type);
6491 name = IDENTIFIER_POINTER (type);
6495 case TEMPLATE_ID_EXPR:
6497 tree fns = TREE_OPERAND (decl, 0);
6500 if (TREE_CODE (dname) == COMPONENT_REF)
6501 dname = TREE_OPERAND (dname, 1);
6502 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6504 gcc_assert (is_overloaded_fn (dname));
6505 dname = DECL_NAME (get_first_fn (dname));
6510 case IDENTIFIER_NODE:
6511 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6514 if (C_IS_RESERVED_WORD (dname))
6516 error ("declarator-id missing; using reserved word `%D'",
6518 name = IDENTIFIER_POINTER (dname);
6520 else if (!IDENTIFIER_TYPENAME_P (dname))
6521 name = IDENTIFIER_POINTER (dname);
6524 gcc_assert (flags == NO_SPECIAL);
6525 flags = TYPENAME_FLAG;
6526 ctor_return_type = TREE_TYPE (dname);
6527 sfk = sfk_conversion;
6528 if (is_typename_at_global_scope (dname))
6529 name = IDENTIFIER_POINTER (dname);
6531 name = "<invalid operator>";
6536 dname = constructor_name (TREE_TYPE (decl));
6537 name = IDENTIFIER_POINTER (dname);
6558 if (id_declarator->kind == cdk_id)
6562 /* A function definition's declarator must have the form of
6563 a function declarator. */
6565 if (funcdef_flag && innermost_code != cdk_function)
6568 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
6569 && innermost_code != cdk_function
6570 && ! (ctype && !declspecs->any_specifiers_p))
6572 error ("declaration of `%D' as non-function", dname);
6573 return void_type_node;
6576 /* Anything declared one level down from the top level
6577 must be one of the parameters of a function
6578 (because the body is at least two levels down). */
6580 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6581 by not allowing C++ class definitions to specify their parameters
6582 with xdecls (must be spec.d in the parmlist).
6584 Since we now wait to push a class scope until we are sure that
6585 we are in a legitimate method context, we must set oldcname
6586 explicitly (since current_class_name is not yet alive).
6588 We also want to avoid calling this a PARM if it is in a namespace. */
6590 if (decl_context == NORMAL && !toplevel_bindings_p ())
6592 struct cp_binding_level *b = current_binding_level;
6593 current_binding_level = b->level_chain;
6594 if (current_binding_level != 0 && toplevel_bindings_p ())
6595 decl_context = PARM;
6596 current_binding_level = b;
6600 name = decl_context == PARM ? "parameter" : "type name";
6602 /* If there were multiple types specified in the decl-specifier-seq,
6603 issue an error message. */
6604 if (declspecs->multiple_types_p)
6605 error ("two or more data types in declaration of `%s'", name);
6606 /* Extract the basic type from the decl-specifier-seq. */
6607 type = declspecs->type;
6608 if (type == error_mark_node)
6610 /* If the entire declaration is itself tagged as deprecated then
6611 suppress reports of deprecated items. */
6612 if (type && TREE_DEPRECATED (type)
6613 && deprecated_state != DEPRECATED_SUPPRESS)
6614 warn_deprecated_use (type);
6615 if (type && TREE_CODE (type) == TYPE_DECL)
6617 typedef_decl = type;
6618 type = TREE_TYPE (typedef_decl);
6620 /* No type at all: default to `int', and set DEFAULTED_INT
6621 because it was not a user-defined typedef. */
6622 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
6624 /* These imply 'int'. */
6625 type = integer_type_node;
6629 explicit_int = declspecs->explicit_int_p;
6630 explicit_char = declspecs->explicit_char_p;
6632 /* Check for repeated decl-specifiers. */
6633 for (ds = ds_first; ds != ds_last; ++ds)
6635 unsigned count = declspecs->specs[(int)ds];
6638 /* The "long" specifier is a special case because of
6643 error ("`long long long' is too long for GCC");
6644 else if (pedantic && !in_system_header && warn_long_long)
6645 pedwarn ("ISO C++ does not support `long long'");
6649 else if (declspecs->specs[(int)ds] > 1)
6651 static const char *const decl_spec_names[] = {
6667 error ("duplicate `%s'", decl_spec_names[(int)ds]);
6672 /* See the code below that used this. */
6674 decl_attr = DECL_ATTRIBUTES (typedef_decl);
6676 typedef_type = type;
6679 if (sfk != sfk_conversion)
6680 ctor_return_type = ctype;
6682 if (sfk != sfk_none)
6683 type = check_special_function_return_type (sfk, type,
6685 else if (type == NULL_TREE)
6691 /* We handle `main' specially here, because 'main () { }' is so
6692 common. With no options, it is allowed. With -Wreturn-type,
6693 it is a warning. It is only an error with -pedantic-errors. */
6694 is_main = (funcdef_flag
6695 && dname && MAIN_NAME_P (dname)
6696 && ctype == NULL_TREE
6697 && in_namespace == NULL_TREE
6698 && current_namespace == global_namespace);
6700 if (in_system_header || flag_ms_extensions)
6701 /* Allow it, sigh. */;
6702 else if (pedantic || ! is_main)
6703 pedwarn ("ISO C++ forbids declaration of `%s' with no type",
6705 else if (warn_return_type)
6706 warning ("ISO C++ forbids declaration of `%s' with no type",
6709 type = integer_type_node;
6714 /* Now process the modifiers that were specified
6715 and check for invalid combinations. */
6717 /* Long double is a special combination. */
6718 if (long_p && TYPE_MAIN_VARIANT (type) == double_type_node)
6721 type = build_qualified_type (long_double_type_node,
6722 cp_type_quals (type));
6725 /* Check all other uses of type modifiers. */
6727 if (unsigned_p || signed_p || long_p || short_p)
6731 if (TREE_CODE (type) == REAL_TYPE)
6732 error ("short, signed or unsigned invalid for `%s'", name);
6733 else if (TREE_CODE (type) != INTEGER_TYPE)
6734 error ("long, short, signed or unsigned invalid for `%s'", name);
6735 else if (long_p && short_p)
6736 error ("long and short specified together for `%s'", name);
6737 else if ((long_p || short_p) && explicit_char)
6738 error ("long or short specified with char for `%s'", name);
6739 else if ((long_p|| short_p) && TREE_CODE (type) == REAL_TYPE)
6740 error ("long or short specified with floating type for `%s'", name);
6741 else if (signed_p && unsigned_p)
6742 error ("signed and unsigned given together for `%s'", name);
6746 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
6748 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
6750 if (flag_pedantic_errors)
6755 /* Discard the type modifiers if they are invalid. */
6766 /* Decide whether an integer type is signed or not.
6767 Optionally treat bitfields as signed by default. */
6771 It is implementation-defined whether a plain (neither
6772 explicitly signed or unsigned) char, short, int, or long
6773 bit-field is signed or unsigned.
6775 Naturally, we extend this to long long as well. Note that
6776 this does not include wchar_t. */
6777 || (bitfield && !flag_signed_bitfields
6779 /* A typedef for plain `int' without `signed' can be
6780 controlled just like plain `int', but a typedef for
6781 `signed int' cannot be so controlled. */
6783 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
6784 && (TREE_CODE (type) == INTEGER_TYPE
6785 || TREE_CODE (type) == CHAR_TYPE)
6786 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
6789 type = long_long_unsigned_type_node;
6791 type = long_unsigned_type_node;
6793 type = short_unsigned_type_node;
6794 else if (type == char_type_node)
6795 type = unsigned_char_type_node;
6796 else if (typedef_decl)
6797 type = c_common_unsigned_type (type);
6799 type = unsigned_type_node;
6801 else if (signed_p && type == char_type_node)
6802 type = signed_char_type_node;
6804 type = long_long_integer_type_node;
6806 type = long_integer_type_node;
6808 type = short_integer_type_node;
6810 if (declspecs->specs[(int)ds_complex])
6812 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
6813 error ("complex invalid for `%s'", name);
6814 /* If we just have "complex", it is equivalent to
6815 "complex double", but if any modifiers at all are specified it is
6816 the complex form of TYPE. E.g, "complex short" is
6817 "complex short int". */
6819 else if (defaulted_int && ! longlong
6820 && ! (long_p || short_p || signed_p || unsigned_p))
6821 type = complex_double_type_node;
6822 else if (type == integer_type_node)
6823 type = complex_integer_type_node;
6824 else if (type == float_type_node)
6825 type = complex_float_type_node;
6826 else if (type == double_type_node)
6827 type = complex_double_type_node;
6828 else if (type == long_double_type_node)
6829 type = complex_long_double_type_node;
6831 type = build_complex_type (type);
6834 type_quals = TYPE_UNQUALIFIED;
6835 if (declspecs->specs[(int)ds_const])
6836 type_quals |= TYPE_QUAL_CONST;
6837 if (declspecs->specs[(int)ds_volatile])
6838 type_quals |= TYPE_QUAL_VOLATILE;
6839 if (declspecs->specs[(int)ds_restrict])
6840 type_quals |= TYPE_QUAL_RESTRICT;
6841 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
6842 error ("qualifiers are not allowed on declaration of `operator %T'",
6845 type_quals |= cp_type_quals (type);
6846 type = cp_build_qualified_type_real
6847 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
6848 ? tf_ignore_bad_quals : 0) | tf_error | tf_warning));
6849 /* We might have ignored or rejected some of the qualifiers. */
6850 type_quals = cp_type_quals (type);
6853 inlinep = !! declspecs->specs[(int)ds_inline];
6854 virtualp = !! declspecs->specs[(int)ds_virtual];
6855 explicitp = !! declspecs->specs[(int)ds_explicit];
6857 storage_class = declspecs->storage_class;
6858 if (storage_class == sc_static)
6859 staticp = 1 + (decl_context == FIELD);
6861 if (virtualp && staticp == 2)
6863 error ("member `%D' cannot be declared both virtual and static",
6867 friendp = !! declspecs->specs[(int)ds_friend];
6869 if (dependant_name && !friendp)
6871 error ("`%T::%D' is not a valid declarator", ctype, dependant_name);
6872 return void_type_node;
6875 /* Issue errors about use of storage classes for parameters. */
6876 if (decl_context == PARM)
6878 if (declspecs->specs[(int)ds_typedef])
6879 error ("typedef declaration invalid in parameter declaration");
6880 else if (storage_class == sc_static
6881 || storage_class == sc_extern
6883 error ("storage class specifiers invalid in parameter declarations");
6886 /* Give error if `virtual' is used outside of class declaration. */
6888 && (current_class_name == NULL_TREE || decl_context != FIELD))
6890 error ("virtual outside class declaration");
6894 /* Static anonymous unions are dealt with here. */
6895 if (staticp && decl_context == TYPENAME
6897 && ANON_AGGR_TYPE_P (declspecs->type))
6898 decl_context = FIELD;
6900 /* Warn about storage classes that are invalid for certain
6901 kinds of declarations (parameters, typenames, etc.). */
6902 if (declspecs->multiple_storage_classes_p)
6903 error ("multiple storage classes in declaration of `%s'", name);
6906 && storage_class != sc_extern
6907 && storage_class != sc_static)
6908 || declspecs->specs[(int)ds_typedef]))
6910 error ("multiple storage classes in declaration of `%s'", name);
6913 else if (decl_context != NORMAL
6914 && ((storage_class != sc_none
6915 && storage_class != sc_mutable)
6918 if ((decl_context == PARM || decl_context == CATCHPARM)
6919 && (storage_class == sc_register
6920 || storage_class == sc_auto))
6922 else if (declspecs->specs[(int)ds_typedef])
6924 else if (decl_context == FIELD
6925 /* C++ allows static class elements. */
6926 && storage_class == sc_static)
6927 /* C++ also allows inlines and signed and unsigned elements,
6928 but in those cases we don't come in here. */
6932 if (decl_context == FIELD)
6934 tree tmp = NULL_TREE;
6939 /* Avoid trying to get an operand off an identifier node. */
6940 if (declarator->kind != cdk_id)
6941 tmp = declarator->declarator->u.id.name;
6943 tmp = declarator->u.id.name;
6944 op = IDENTIFIER_OPNAME_P (tmp);
6945 if (IDENTIFIER_TYPENAME_P (tmp))
6947 if (is_typename_at_global_scope (tmp))
6948 name = IDENTIFIER_POINTER (tmp);
6950 name = "<invalid operator>";
6953 error ("storage class specified for %s `%s'",
6954 op ? "member operator" : "field",
6959 if (decl_context == PARM || decl_context == CATCHPARM)
6960 error ("storage class specified for parameter `%s'", name);
6962 error ("storage class specified for typename");
6964 if (storage_class == sc_register
6965 || storage_class == sc_auto
6966 || storage_class == sc_extern
6968 storage_class = sc_none;
6971 else if (storage_class == sc_extern && initialized
6974 if (toplevel_bindings_p ())
6976 /* It's common practice (and completely valid) to have a const
6977 be initialized and declared extern. */
6978 if (!(type_quals & TYPE_QUAL_CONST))
6979 warning ("`%s' initialized and declared `extern'", name);
6982 error ("`%s' has both `extern' and initializer", name);
6984 else if (storage_class == sc_extern && funcdef_flag
6985 && ! toplevel_bindings_p ())
6986 error ("nested function `%s' declared `extern'", name);
6987 else if (toplevel_bindings_p ())
6989 if (storage_class == sc_auto)
6990 error ("top-level declaration of `%s' specifies `auto'", name);
6993 && storage_class != sc_extern
6994 && storage_class != sc_static)
6996 error ("function-scope `%s' implicitly auto and declared `__thread'",
7001 if (storage_class && friendp)
7002 error ("storage class specifiers invalid in friend function declarations");
7005 unqualified_id = NULL_TREE;
7008 unqualified_id = id_declarator->u.id.name;
7009 if (TREE_CODE (unqualified_id) == SCOPE_REF)
7010 unqualified_id = TREE_OPERAND (unqualified_id, 1);
7011 if (TREE_CODE (unqualified_id) == BASELINK)
7012 unqualified_id = BASELINK_FUNCTIONS (unqualified_id);
7013 switch (TREE_CODE (unqualified_id))
7017 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7022 = constructor_name (TREE_TYPE (unqualified_id));
7025 case IDENTIFIER_NODE:
7026 case TEMPLATE_ID_EXPR:
7034 /* Determine the type of the entity declared by recurring on the
7037 declarator && declarator->kind != cdk_id;
7038 declarator = declarator->declarator)
7040 const cp_declarator *inner_declarator;
7043 if (type == error_mark_node)
7044 return error_mark_node;
7046 inner_declarator = declarator->declarator;
7048 attrs = declarator->attributes;
7054 if (declarator == NULL || declarator->kind == cdk_id)
7055 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7056 if (declarator->kind == cdk_function)
7057 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7058 if (declarator->kind == cdk_array)
7059 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7060 returned_attrs = decl_attributes (&type,
7061 chainon (returned_attrs, attrs),
7065 switch (declarator->kind)
7068 type = create_array_type_for_decl (dname, type,
7069 declarator->u.array.bounds);
7070 if (inner_declarator
7071 && (inner_declarator->kind == cdk_pointer
7072 || inner_declarator->kind == cdk_reference
7073 || inner_declarator->kind == cdk_ptrmem))
7074 /* We can never complete an array type which is the
7075 target of a pointer, so go ahead and lay it out. */
7084 /* Declaring a function type.
7085 Make sure we have a valid type for the function to return. */
7087 /* We now know that the TYPE_QUALS don't apply to the
7088 decl, but to its return type. */
7089 type_quals = TYPE_UNQUALIFIED;
7091 /* Warn about some types functions can't return. */
7093 if (TREE_CODE (type) == FUNCTION_TYPE)
7095 error ("`%s' declared as function returning a function", name);
7096 type = integer_type_node;
7098 if (TREE_CODE (type) == ARRAY_TYPE)
7100 error ("`%s' declared as function returning an array", name);
7101 type = integer_type_node;
7104 /* Pick up type qualifiers which should be applied to `this'. */
7105 quals = declarator->u.function.qualifiers;
7107 /* Pick up the exception specifications. */
7108 raises = declarator->u.function.exception_specification;
7110 /* Say it's a definition only for the CALL_EXPR
7111 closest to the identifier. */
7112 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7114 if (ctype == NULL_TREE
7115 && decl_context == FIELD
7117 && (friendp == 0 || dname == current_class_name))
7118 ctype = current_class_type;
7120 if (ctype && sfk == sfk_conversion)
7121 TYPE_HAS_CONVERSION (ctype) = 1;
7122 if (ctype && (sfk == sfk_constructor
7123 || sfk == sfk_destructor))
7125 /* We are within a class's scope. If our declarator name
7126 is the same as the class name, and we are defining
7127 a function, then it is a constructor/destructor, and
7128 therefore returns a void type. */
7130 if (flags == DTOR_FLAG)
7132 /* ISO C++ 12.4/2. A destructor may not be
7133 declared const or volatile. A destructor may
7136 error ("destructor cannot be static member function");
7139 error ("destructors may not be cv-qualified");
7140 quals = TYPE_UNQUALIFIED;
7142 if (decl_context == FIELD)
7144 if (! member_function_or_else (ctype,
7147 return void_type_node;
7150 else /* It's a constructor. */
7154 /* ISO C++ 12.1. A constructor may not be
7155 declared const or volatile. A constructor may
7156 not be virtual. A constructor may not be
7159 error ("constructor cannot be static member function");
7162 pedwarn ("constructors cannot be declared virtual");
7167 error ("constructors may not be cv-qualified");
7168 quals = TYPE_UNQUALIFIED;
7170 if (decl_context == FIELD)
7172 if (! member_function_or_else (ctype,
7175 return void_type_node;
7176 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
7177 if (sfk != sfk_constructor)
7181 if (decl_context == FIELD)
7187 error ("can't initialize friend function `%s'", name);
7190 /* Cannot be both friend and virtual. */
7191 error ("virtual functions cannot be friends");
7194 if (decl_context == NORMAL)
7195 error ("friend declaration not in class definition");
7196 if (current_function_decl && funcdef_flag)
7197 error ("can't define friend function `%s' in a local class definition",
7201 arg_types = grokparms (declarator->u.function.parameters,
7204 if (inner_declarator
7205 && inner_declarator->kind == cdk_id
7206 && inner_declarator->u.id.sfk == sfk_destructor
7207 && arg_types != void_list_node)
7209 error ("destructors may not have parameters");
7210 arg_types = void_list_node;
7214 type = build_function_type (type, arg_types);
7221 /* Filter out pointers-to-references and references-to-references.
7222 We can get these if a TYPE_DECL is used. */
7224 if (TREE_CODE (type) == REFERENCE_TYPE)
7226 error (declarator->kind == cdk_reference
7227 ? "cannot declare reference to `%#T'"
7228 : "cannot declare pointer to `%#T'", type);
7229 type = TREE_TYPE (type);
7231 else if (VOID_TYPE_P (type))
7233 if (declarator->kind == cdk_reference)
7234 error ("cannot declare reference to `%#T'", type);
7235 else if (declarator->kind == cdk_ptrmem)
7236 error ("cannot declare pointer to `%#T' member", type);
7239 /* We now know that the TYPE_QUALS don't apply to the decl,
7240 but to the target of the pointer. */
7241 type_quals = TYPE_UNQUALIFIED;
7243 if (declarator->kind == cdk_ptrmem
7244 && (TREE_CODE (type) == FUNCTION_TYPE
7245 || (quals && TREE_CODE (type) == METHOD_TYPE)))
7247 tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
7248 grok_method_quals (declarator->u.pointer.class_type,
7250 type = TREE_TYPE (dummy);
7251 quals = TYPE_UNQUALIFIED;
7254 if (declarator->kind == cdk_reference)
7256 if (!VOID_TYPE_P (type))
7257 type = build_reference_type (type);
7259 else if (TREE_CODE (type) == METHOD_TYPE)
7260 type = build_ptrmemfunc_type (build_pointer_type (type));
7261 else if (declarator->kind == cdk_ptrmem)
7262 type = build_ptrmem_type (declarator->u.pointer.class_type,
7265 type = build_pointer_type (type);
7267 /* Process a list of type modifier keywords (such as
7268 const or volatile) that were given inside the `*' or `&'. */
7270 if (declarator->u.pointer.qualifiers)
7273 = cp_build_qualified_type (type,
7274 declarator->u.pointer.qualifiers);
7275 type_quals = cp_type_quals (type);
7288 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7289 && TREE_CODE (type) != FUNCTION_TYPE
7290 && TREE_CODE (type) != METHOD_TYPE)
7292 error ("template-id `%D' used as a declarator",
7294 unqualified_id = dname;
7297 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7298 otherwise, we would not have exited the loop above. */
7300 && TREE_CODE (declarator->u.id.name) == SCOPE_REF
7301 /* If the qualifying scope was invalid, it will have been set to
7303 && TREE_OPERAND (declarator->u.id.name, 0)
7304 && TYPE_P (TREE_OPERAND (declarator->u.id.name, 0)))
7308 ctype = TREE_OPERAND (declarator->u.id.name, 0);
7310 ctype = TYPE_MAIN_VARIANT (ctype);
7312 while (t != NULL_TREE && CLASS_TYPE_P (t))
7314 /* You're supposed to have one `template <...>' for every
7315 template class, but you don't need one for a full
7316 specialization. For example:
7318 template <class T> struct S{};
7319 template <> struct S<int> { void f(); };
7320 void S<int>::f () {}
7322 is correct; there shouldn't be a `template <>' for the
7323 definition of `S<int>::f'. */
7324 if (CLASSTYPE_TEMPLATE_INFO (t)
7325 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t)
7326 || uses_template_parms (CLASSTYPE_TI_ARGS (t)))
7327 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7328 template_count += 1;
7330 t = TYPE_MAIN_DECL (t);
7331 t = DECL_CONTEXT (t);
7334 if (ctype == current_class_type)
7340 Is this ill-formed? */
7343 pedwarn ("extra qualification `%T::' on member `%s' ignored",
7346 else if (TREE_CODE (type) == FUNCTION_TYPE)
7348 tree sname = TREE_OPERAND (declarator->u.id.name, 1);
7350 if (TREE_CODE (sname) == IDENTIFIER_NODE
7351 && NEW_DELETE_OPNAME_P (sname))
7352 /* Overloaded operator new and operator delete
7353 are always static functions. */
7355 else if (current_class_type == NULL_TREE || friendp)
7357 = build_method_type_directly (ctype,
7359 TYPE_ARG_TYPES (type));
7362 error ("cannot declare member function `%T::%s' within `%T'",
7363 ctype, name, current_class_type);
7364 return error_mark_node;
7367 else if (declspecs->specs[(int)ds_typedef]
7368 || COMPLETE_TYPE_P (complete_type (ctype)))
7370 /* Have to move this code elsewhere in this function.
7371 this code is used for i.e., typedef int A::M; M *pm;
7373 It is? How? jason 10/2/94 */
7375 if (current_class_type)
7377 error ("cannot declare member `%T::%s' within `%T'",
7378 ctype, name, current_class_type);
7379 return void_type_node;
7384 cxx_incomplete_type_error (NULL_TREE, ctype);
7385 return error_mark_node;
7392 *attrlist = chainon (returned_attrs, *attrlist);
7394 attrlist = &returned_attrs;
7397 /* Now TYPE has the actual type. */
7399 /* Did array size calculations overflow? */
7401 if (TREE_CODE (type) == ARRAY_TYPE
7402 && COMPLETE_TYPE_P (type)
7403 && TREE_OVERFLOW (TYPE_SIZE (type)))
7405 error ("size of array `%s' is too large", name);
7406 /* If we proceed with the array type as it is, we'll eventually
7407 crash in tree_low_cst(). */
7408 type = error_mark_node;
7411 if ((decl_context == FIELD || decl_context == PARM)
7412 && !processing_template_decl
7413 && variably_modified_type_p (type, NULL_TREE))
7415 if (decl_context == FIELD)
7416 error ("data member may not have variably modified type `%T'", type);
7418 error ("parameter may not have variably modified type `%T'", type);
7419 type = error_mark_node;
7422 if (explicitp == 1 || (explicitp && friendp))
7424 /* [dcl.fct.spec] The explicit specifier shall only be used in
7425 declarations of constructors within a class definition. */
7426 error ("only declarations of constructors can be `explicit'");
7430 if (storage_class == sc_mutable)
7432 if (decl_context != FIELD || friendp)
7434 error ("non-member `%s' cannot be declared `mutable'", name);
7435 storage_class = sc_none;
7437 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7439 error ("non-object member `%s' cannot be declared `mutable'", name);
7440 storage_class = sc_none;
7442 else if (TREE_CODE (type) == FUNCTION_TYPE
7443 || TREE_CODE (type) == METHOD_TYPE)
7445 error ("function `%s' cannot be declared `mutable'", name);
7446 storage_class = sc_none;
7450 error ("static `%s' cannot be declared `mutable'", name);
7451 storage_class = sc_none;
7453 else if (type_quals & TYPE_QUAL_CONST)
7455 error ("const `%s' cannot be declared `mutable'", name);
7456 storage_class = sc_none;
7460 /* If this is declaring a typedef name, return a TYPE_DECL. */
7461 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7465 /* Note that the grammar rejects storage classes
7466 in typenames, fields or parameters. */
7467 if (current_lang_name == lang_name_java)
7468 TYPE_FOR_JAVA (type) = 1;
7470 if (decl_context == FIELD)
7472 if (constructor_name_p (unqualified_id, current_class_type))
7473 pedwarn ("ISO C++ forbids nested type `%D' with same name as enclosing class",
7475 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7479 decl = build_decl (TYPE_DECL, unqualified_id, type);
7480 if (in_namespace || ctype)
7481 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7482 if (!current_function_decl)
7483 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7486 /* If the user declares "typedef struct {...} foo" then the
7487 struct will have an anonymous name. Fill that name in now.
7488 Nothing can refer to it, so nothing needs know about the name
7490 if (type != error_mark_node
7493 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7494 && TYPE_ANONYMOUS_P (type)
7495 /* Don't do this if there are attributes. */
7496 && (!attrlist || !*attrlist)
7497 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7499 tree oldname = TYPE_NAME (type);
7502 /* Replace the anonymous name with the real name everywhere. */
7503 lookup_tag_reverse (type, unqualified_id);
7504 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7505 if (TYPE_NAME (t) == oldname)
7506 TYPE_NAME (t) = decl;
7508 if (TYPE_LANG_SPECIFIC (type))
7509 TYPE_WAS_ANONYMOUS (type) = 1;
7511 /* If this is a typedef within a template class, the nested
7512 type is a (non-primary) template. The name for the
7513 template needs updating as well. */
7514 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7515 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7516 = TYPE_IDENTIFIER (type);
7518 /* FIXME remangle member functions; member functions of a
7519 type with external linkage have external linkage. */
7524 if (ctype == NULL_TREE)
7526 if (TREE_CODE (type) != METHOD_TYPE)
7527 error ("%Jinvalid type qualifier for non-member function type",
7530 ctype = TYPE_METHOD_BASETYPE (type);
7532 if (ctype != NULL_TREE)
7533 grok_method_quals (ctype, decl, quals);
7537 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7538 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7540 bad_specifiers (decl, "type", virtualp, quals != TYPE_UNQUALIFIED,
7541 inlinep, friendp, raises != NULL_TREE);
7546 /* Detect the case of an array type of unspecified size
7547 which came, as such, direct from a typedef name.
7548 We must copy the type, so that the array's domain can be
7549 individually set by the object's initializer. */
7551 if (type && typedef_type
7552 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7553 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7554 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7556 /* Detect where we're using a typedef of function type to declare a
7557 function. PARMS will not be set, so we must create it now. */
7559 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
7561 tree decls = NULL_TREE;
7564 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
7566 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
7568 TREE_CHAIN (decl) = decls;
7572 parms = nreverse (decls);
7575 /* If this is a type name (such as, in a cast or sizeof),
7576 compute the type and return it now. */
7578 if (decl_context == TYPENAME)
7580 /* Note that the grammar rejects storage classes
7581 in typenames, fields or parameters. */
7582 if (type_quals != TYPE_UNQUALIFIED)
7583 type_quals = TYPE_UNQUALIFIED;
7585 /* Special case: "friend class foo" looks like a TYPENAME context. */
7588 if (type_quals != TYPE_UNQUALIFIED)
7590 error ("type qualifiers specified for friend class declaration");
7591 type_quals = TYPE_UNQUALIFIED;
7595 error ("`inline' specified for friend class declaration");
7601 /* Don't allow friend declaration without a class-key. */
7602 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
7603 pedwarn ("template parameters cannot be friends");
7604 else if (TREE_CODE (type) == TYPENAME_TYPE)
7605 pedwarn ("friend declaration requires class-key, "
7606 "i.e. `friend class %T::%D'",
7607 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
7609 pedwarn ("friend declaration requires class-key, "
7610 "i.e. `friend %#T'",
7614 /* Only try to do this stuff if we didn't already give up. */
7615 if (type != integer_type_node)
7617 /* A friendly class? */
7618 if (current_class_type)
7619 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
7622 error ("trying to make class `%T' a friend of global scope",
7625 type = void_type_node;
7630 if (ctype == NULL_TREE)
7632 if (TREE_CODE (type) != METHOD_TYPE)
7633 error ("invalid qualifiers on non-member function type");
7635 ctype = TYPE_METHOD_BASETYPE (type);
7639 tree dummy = build_decl (TYPE_DECL, unqualified_id, type);
7640 grok_method_quals (ctype, dummy, quals);
7641 type = TREE_TYPE (dummy);
7647 else if (unqualified_id == NULL_TREE && decl_context != PARM
7648 && decl_context != CATCHPARM
7649 && TREE_CODE (type) != UNION_TYPE
7652 error ("abstract declarator `%T' used as declaration", type);
7653 unqualified_id = make_anon_name ();
7656 /* `void' at top level (not within pointer)
7657 is allowed only in typedefs or type names.
7658 We don't complain about parms either, but that is because
7659 a better error message can be made later. */
7661 if (TREE_CODE (type) == VOID_TYPE && decl_context != PARM)
7663 if (! unqualified_id)
7664 error ("unnamed variable or field declared void");
7665 else if (TREE_CODE (unqualified_id) == IDENTIFIER_NODE)
7667 gcc_assert (!IDENTIFIER_OPNAME_P (unqualified_id));
7668 error ("variable or field `%s' declared void", name);
7671 error ("variable or field declared void");
7672 type = integer_type_node;
7675 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7676 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7678 if (decl_context == PARM || decl_context == CATCHPARM)
7680 if (ctype || in_namespace)
7681 error ("cannot use `::' in parameter declaration");
7683 /* A parameter declared as an array of T is really a pointer to T.
7684 One declared as a function is really a pointer to a function.
7685 One declared as a member is really a pointer to member. */
7687 if (TREE_CODE (type) == ARRAY_TYPE)
7689 /* Transfer const-ness of array into that of type pointed to. */
7690 type = build_pointer_type (TREE_TYPE (type));
7691 type_quals = TYPE_UNQUALIFIED;
7693 else if (TREE_CODE (type) == FUNCTION_TYPE)
7694 type = build_pointer_type (type);
7700 if (decl_context == PARM)
7702 decl = cp_build_parm_decl (unqualified_id, type);
7704 bad_specifiers (decl, "parameter", virtualp, quals != TYPE_UNQUALIFIED,
7705 inlinep, friendp, raises != NULL_TREE);
7707 else if (decl_context == FIELD)
7709 /* The C99 flexible array extension. */
7710 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
7711 && TYPE_DOMAIN (type) == NULL_TREE)
7713 tree itype = compute_array_index_type (dname, integer_zero_node);
7714 type = build_cplus_array_type (TREE_TYPE (type), itype);
7717 if (type == error_mark_node)
7719 /* Happens when declaring arrays of sizes which
7720 are error_mark_node, for example. */
7723 else if (in_namespace && !friendp)
7725 /* Something like struct S { int N::j; }; */
7726 error ("invalid use of `::'");
7729 else if (TREE_CODE (type) == FUNCTION_TYPE)
7732 tree function_context;
7734 /* We catch the others as conflicts with the builtin
7736 if (friendp && unqualified_id == ridpointers[(int) RID_SIGNED])
7738 error ("function `%D' cannot be declared friend",
7745 if (ctype == NULL_TREE)
7746 ctype = current_class_type;
7748 if (ctype == NULL_TREE)
7750 error ("can't make `%D' into a method -- not in a class",
7752 return void_type_node;
7755 /* ``A union may [ ... ] not [ have ] virtual functions.''
7757 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
7759 error ("function `%D' declared virtual inside a union",
7761 return void_type_node;
7764 if (NEW_DELETE_OPNAME_P (unqualified_id))
7768 error ("`%D' cannot be declared virtual, since it is always static",
7773 else if (staticp < 2)
7774 type = build_method_type_directly (ctype,
7776 TYPE_ARG_TYPES (type));
7779 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7780 function_context = (ctype != NULL_TREE) ?
7781 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
7782 publicp = (! friendp || ! staticp)
7783 && function_context == NULL_TREE;
7784 decl = grokfndecl (ctype, type,
7785 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7786 ? unqualified_id : dname,
7789 virtualp, flags, quals, raises,
7790 friendp ? -1 : 0, friendp, publicp, inlinep,
7791 funcdef_flag, template_count, in_namespace);
7792 if (decl == NULL_TREE)
7795 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7796 /* The decl and setting of decl_attr is also turned off. */
7797 decl = build_decl_attribute_variant (decl, decl_attr);
7800 /* [class.conv.ctor]
7802 A constructor declared without the function-specifier
7803 explicit that can be called with a single parameter
7804 specifies a conversion from the type of its first
7805 parameter to the type of its class. Such a constructor
7806 is called a converting constructor. */
7808 DECL_NONCONVERTING_P (decl) = 1;
7809 else if (DECL_CONSTRUCTOR_P (decl))
7811 /* The constructor can be called with exactly one
7812 parameter if there is at least one parameter, and
7813 any subsequent parameters have default arguments.
7814 Ignore any compiler-added parms. */
7815 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
7817 if (arg_types == void_list_node
7819 && TREE_CHAIN (arg_types)
7820 && TREE_CHAIN (arg_types) != void_list_node
7821 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
7822 DECL_NONCONVERTING_P (decl) = 1;
7825 else if (TREE_CODE (type) == METHOD_TYPE)
7827 /* We only get here for friend declarations of
7828 members of other classes. */
7829 /* All method decls are public, so tell grokfndecl to set
7830 TREE_PUBLIC, also. */
7831 decl = grokfndecl (ctype, type,
7832 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7833 ? unqualified_id : dname,
7836 virtualp, flags, quals, raises,
7837 friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
7838 template_count, in_namespace);
7839 if (decl == NULL_TREE)
7842 else if (!staticp && !dependent_type_p (type)
7843 && !COMPLETE_TYPE_P (complete_type (type))
7844 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
7847 error ("field `%D' has incomplete type", unqualified_id);
7849 error ("name `%T' has incomplete type", type);
7851 /* If we're instantiating a template, tell them which
7852 instantiation made the field's type be incomplete. */
7853 if (current_class_type
7854 && TYPE_NAME (current_class_type)
7855 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
7857 && declspecs->type == type)
7858 error (" in instantiation of template `%T'",
7859 current_class_type);
7861 type = error_mark_node;
7868 error ("`%E' is neither function nor member function; "
7869 "cannot be declared friend", unqualified_id);
7877 /* Friends are treated specially. */
7878 if (ctype == current_class_type)
7879 warning ("member functions are implicitly friends of their class");
7880 else if (decl && DECL_NAME (decl))
7882 if (template_class_depth (current_class_type) == 0)
7884 decl = check_explicit_specialization
7885 (unqualified_id, decl, template_count,
7886 2 * (funcdef_flag != 0) + 4);
7887 if (decl == error_mark_node)
7888 return error_mark_node;
7891 decl = do_friend (ctype, unqualified_id, decl,
7892 *attrlist, flags, quals, funcdef_flag);
7896 return void_type_node;
7899 /* Structure field. It may not be a function, except for C++. */
7901 if (decl == NULL_TREE)
7907 /* An attempt is being made to initialize a non-static
7908 member. But, from [class.mem]:
7910 4 A member-declarator can contain a
7911 constant-initializer only if it declares a static
7912 member (_class.static_) of integral or enumeration
7913 type, see _class.static.data_.
7915 This used to be relatively common practice, but
7916 the rest of the compiler does not correctly
7917 handle the initialization unless the member is
7918 static so we make it static below. */
7919 pedwarn ("ISO C++ forbids initialization of member `%D'",
7921 pedwarn ("making `%D' static", unqualified_id);
7925 if (uses_template_parms (type))
7926 /* We'll check at instantiation time. */
7928 else if (check_static_variable_definition (unqualified_id,
7930 /* If we just return the declaration, crashes
7931 will sometimes occur. We therefore return
7932 void_type_node, as if this was a friend
7933 declaration, to cause callers to completely
7934 ignore this declaration. */
7935 return void_type_node;
7940 /* C++ allows static class members. All other work
7941 for this is done by grokfield. */
7942 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
7943 set_linkage_for_static_data_member (decl);
7944 /* Even if there is an in-class initialization, DECL
7945 is considered undefined until an out-of-class
7946 definition is provided. */
7947 DECL_EXTERNAL (decl) = 1;
7951 decl = build_decl (FIELD_DECL, unqualified_id, type);
7952 DECL_NONADDRESSABLE_P (decl) = bitfield;
7953 if (storage_class == sc_mutable)
7955 DECL_MUTABLE_P (decl) = 1;
7956 storage_class = sc_none;
7960 bad_specifiers (decl, "field", virtualp, quals != TYPE_UNQUALIFIED,
7961 inlinep, friendp, raises != NULL_TREE);
7964 else if (TREE_CODE (type) == FUNCTION_TYPE
7965 || TREE_CODE (type) == METHOD_TYPE)
7970 if (!unqualified_id)
7973 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
7974 original_name = dname;
7976 original_name = unqualified_id;
7978 if (storage_class == sc_auto)
7979 error ("storage class `auto' invalid for function `%s'", name);
7980 else if (storage_class == sc_register)
7981 error ("storage class `register' invalid for function `%s'", name);
7983 error ("storage class `__thread' invalid for function `%s'", name);
7985 /* Function declaration not at top level.
7986 Storage classes other than `extern' are not allowed
7987 and `extern' makes no difference. */
7988 if (! toplevel_bindings_p ()
7989 && (storage_class == sc_static
7990 || declspecs->specs[(int)ds_inline])
7993 if (storage_class == sc_static)
7994 pedwarn ("`static' specified invalid for function `%s' declared out of global scope", name);
7996 pedwarn ("`inline' specifier invalid for function `%s' declared out of global scope", name);
7999 if (ctype == NULL_TREE)
8003 error ("virtual non-class function `%s'", name);
8007 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8008 && !NEW_DELETE_OPNAME_P (original_name))
8009 type = build_method_type_directly (ctype,
8011 TYPE_ARG_TYPES (type));
8013 /* Record presence of `static'. */
8014 publicp = (ctype != NULL_TREE
8015 || storage_class == sc_extern
8016 || storage_class != sc_static);
8018 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8019 virtualp, flags, quals, raises,
8021 publicp, inlinep, funcdef_flag,
8022 template_count, in_namespace);
8023 if (decl == NULL_TREE)
8028 int invalid_static = 0;
8030 /* Don't allow a static member function in a class, and forbid
8031 declaring main to be static. */
8032 if (TREE_CODE (type) == METHOD_TYPE)
8034 pedwarn ("cannot declare member function `%D' to have static linkage", decl);
8037 else if (current_function_decl)
8039 /* FIXME need arm citation */
8040 error ("cannot declare static function inside another function");
8047 storage_class = sc_none;
8053 /* It's a variable. */
8055 /* An uninitialized decl with `extern' is a reference. */
8056 decl = grokvardecl (type, unqualified_id,
8059 (type_quals & TYPE_QUAL_CONST) != 0,
8060 ctype ? ctype : in_namespace);
8061 bad_specifiers (decl, "variable", virtualp, quals != TYPE_UNQUALIFIED,
8062 inlinep, friendp, raises != NULL_TREE);
8066 DECL_CONTEXT (decl) = ctype;
8069 pedwarn ("`static' may not be used when defining (as opposed to declaring) a static data member");
8071 storage_class = sc_none;
8073 if (storage_class == sc_register && TREE_STATIC (decl))
8075 error ("static member `%D' declared `register'", decl);
8076 storage_class = sc_none;
8078 if (storage_class == sc_extern && pedantic)
8080 pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
8082 storage_class = sc_none;
8087 /* Record `register' declaration for warnings on &
8088 and in case doing stupid register allocation. */
8090 if (storage_class == sc_register)
8091 DECL_REGISTER (decl) = 1;
8092 else if (storage_class == sc_extern)
8093 DECL_THIS_EXTERN (decl) = 1;
8094 else if (storage_class == sc_static)
8095 DECL_THIS_STATIC (decl) = 1;
8097 /* Record constancy and volatility. There's no need to do this
8098 when processing a template; we'll do this for the instantiated
8099 declaration based on the type of DECL. */
8100 if (!processing_template_decl)
8101 c_apply_type_quals_to_decl (type_quals, decl);
8107 /* Subroutine of start_function. Ensure that each of the parameter
8108 types (as listed in PARMS) is complete, as is required for a
8109 function definition. */
8112 require_complete_types_for_parms (tree parms)
8114 for (; parms; parms = TREE_CHAIN (parms))
8116 if (VOID_TYPE_P (TREE_TYPE (parms)))
8117 /* grokparms will have already issued an error. */
8118 TREE_TYPE (parms) = error_mark_node;
8119 else if (complete_type_or_else (TREE_TYPE (parms), parms))
8121 layout_decl (parms, 0);
8122 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8127 /* Returns nonzero if T is a local variable. */
8130 local_variable_p (tree t)
8132 if ((TREE_CODE (t) == VAR_DECL
8133 /* A VAR_DECL with a context that is a _TYPE is a static data
8135 && !TYPE_P (CP_DECL_CONTEXT (t))
8136 /* Any other non-local variable must be at namespace scope. */
8137 && !DECL_NAMESPACE_SCOPE_P (t))
8138 || (TREE_CODE (t) == PARM_DECL))
8144 /* Returns nonzero if T is an automatic local variable or a label.
8145 (These are the declarations that need to be remapped when the code
8146 containing them is duplicated.) */
8149 nonstatic_local_decl_p (tree t)
8151 return ((local_variable_p (t) && !TREE_STATIC (t))
8152 || TREE_CODE (t) == LABEL_DECL
8153 || TREE_CODE (t) == RESULT_DECL);
8156 /* Like local_variable_p, but suitable for use as a tree-walking
8160 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8161 void *data ATTRIBUTE_UNUSED)
8163 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8165 else if (TYPE_P (*tp))
8172 /* Check that ARG, which is a default-argument expression for a
8173 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8174 something goes wrong. DECL may also be a _TYPE node, rather than a
8175 DECL, if there is no DECL available. */
8178 check_default_argument (tree decl, tree arg)
8183 if (TREE_CODE (arg) == DEFAULT_ARG)
8184 /* We get a DEFAULT_ARG when looking at an in-class declaration
8185 with a default argument. Ignore the argument for now; we'll
8186 deal with it after the class is complete. */
8189 if (processing_template_decl || uses_template_parms (arg))
8190 /* We don't do anything checking until instantiation-time. Note
8191 that there may be uninstantiated arguments even for an
8192 instantiated function, since default arguments are not
8193 instantiated until they are needed. */
8202 decl_type = TREE_TYPE (decl);
8204 if (arg == error_mark_node
8205 || decl == error_mark_node
8206 || TREE_TYPE (arg) == error_mark_node
8207 || decl_type == error_mark_node)
8208 /* Something already went wrong. There's no need to check
8210 return error_mark_node;
8212 /* [dcl.fct.default]
8214 A default argument expression is implicitly converted to the
8216 if (!TREE_TYPE (arg)
8217 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
8220 error ("default argument for `%#D' has type `%T'",
8221 decl, TREE_TYPE (arg));
8223 error ("default argument for parameter of type `%T' has type `%T'",
8224 decl_type, TREE_TYPE (arg));
8226 return error_mark_node;
8229 /* [dcl.fct.default]
8231 Local variables shall not be used in default argument
8234 The keyword `this' shall not be used in a default argument of a
8236 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8240 error ("default argument `%E' uses local variable `%D'",
8242 return error_mark_node;
8249 /* Decode the list of parameter types for a function type.
8250 Given the list of things declared inside the parens,
8251 return a list of types.
8253 If this parameter does not end with an ellipsis, we append
8256 *PARMS is set to the chain of PARM_DECLs created. */
8259 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8261 tree result = NULL_TREE;
8262 tree decls = NULL_TREE;
8263 int ellipsis = !first_parm || first_parm->ellipsis_p;
8264 cp_parameter_declarator *parm;
8267 for (parm = first_parm; parm != NULL; parm = parm->next)
8269 tree type = NULL_TREE;
8270 tree init = parm->default_argument;
8274 if (parm == no_parameters)
8277 attrs = parm->decl_specifiers.attributes;
8278 parm->decl_specifiers.attributes = NULL_TREE;
8279 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8280 PARM, init != NULL_TREE, &attrs);
8281 if (! decl || TREE_TYPE (decl) == error_mark_node)
8285 cplus_decl_attributes (&decl, attrs, 0);
8287 type = TREE_TYPE (decl);
8288 if (VOID_TYPE_P (type))
8290 if (same_type_p (type, void_type_node)
8291 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8292 /* this is a parmlist of `(void)', which is ok. */
8294 cxx_incomplete_type_error (decl, type);
8295 /* It's not a good idea to actually create parameters of
8296 type `void'; other parts of the compiler assume that a
8297 void type terminates the parameter list. */
8298 type = error_mark_node;
8299 TREE_TYPE (decl) = error_mark_node;
8302 if (type != error_mark_node)
8304 /* Top-level qualifiers on the parameters are
8305 ignored for function types. */
8306 type = cp_build_qualified_type (type, 0);
8307 if (TREE_CODE (type) == METHOD_TYPE)
8309 error ("parameter `%D' invalidly declared method type", decl);
8310 type = build_pointer_type (type);
8311 TREE_TYPE (decl) = type;
8313 else if (abstract_virtuals_error (decl, type))
8314 any_error = 1; /* Seems like a good idea. */
8315 else if (POINTER_TYPE_P (type))
8317 /* [dcl.fct]/6, parameter types cannot contain pointers
8318 (references) to arrays of unknown bound. */
8319 tree t = TREE_TYPE (type);
8320 int ptr = TYPE_PTR_P (type);
8326 else if (TREE_CODE (t) != ARRAY_TYPE)
8328 else if (!TYPE_DOMAIN (t))
8332 if (TREE_CODE (t) == ARRAY_TYPE)
8333 error ("parameter `%D' includes %s to array of unknown bound `%T'",
8334 decl, ptr ? "pointer" : "reference", t);
8337 if (!any_error && init)
8338 init = check_default_argument (decl, init);
8343 TREE_CHAIN (decl) = decls;
8345 result = tree_cons (init, type, result);
8347 decls = nreverse (decls);
8348 result = nreverse (result);
8350 result = chainon (result, void_list_node);
8357 /* D is a constructor or overloaded `operator='.
8359 Let T be the class in which D is declared. Then, this function
8362 -1 if D's is an ill-formed constructor or copy assignment operator
8363 whose first parameter is of type `T'.
8364 0 if D is not a copy constructor or copy assignment
8366 1 if D is a copy constructor or copy assignment operator whose
8367 first parameter is a reference to const qualified T.
8368 2 if D is a copy constructor or copy assignment operator whose
8369 first parameter is a reference to non-const qualified T.
8371 This function can be used as a predicate. Positive values indicate
8372 a copy constructor and nonzero values indicate a copy assignment
8382 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8384 if (DECL_TEMPLATE_INFO (d) && is_member_template (DECL_TI_TEMPLATE (d)))
8385 /* Instantiations of template member functions are never copy
8386 functions. Note that member functions of templated classes are
8387 represented as template functions internally, and we must
8388 accept those as copy functions. */
8391 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8395 arg_type = TREE_VALUE (args);
8397 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8399 /* Pass by value copy assignment operator. */
8402 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8403 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8405 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8411 args = TREE_CHAIN (args);
8413 if (args && args != void_list_node && !TREE_PURPOSE (args))
8414 /* There are more non-optional args. */
8420 /* Remember any special properties of member function DECL. */
8422 void grok_special_member_properties (tree decl)
8424 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl))
8425 ; /* Not special. */
8426 else if (DECL_CONSTRUCTOR_P (decl))
8428 int ctor = copy_fn_p (decl);
8434 A non-template constructor for class X is a copy
8435 constructor if its first parameter is of type X&, const
8436 X&, volatile X& or const volatile X&, and either there
8437 are no other parameters or else all other parameters have
8438 default arguments. */
8439 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl)) = 1;
8441 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl)) = 1;
8443 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8444 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl)) = 1;
8446 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8450 A non-template assignment operator for class X is a copy
8451 assignment operator if its parameter is of type X, X&, const
8452 X&, volatile X& or const volatile X&. */
8454 int assop = copy_fn_p (decl);
8458 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8460 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8465 /* Check a constructor DECL has the correct form. Complains
8466 if the class has a constructor of the form X(X). */
8469 grok_ctor_properties (tree ctype, tree decl)
8471 int ctor_parm = copy_fn_p (decl);
8477 A declaration of a constructor for a class X is ill-formed if
8478 its first parameter is of type (optionally cv-qualified) X
8479 and either there are no other parameters or else all other
8480 parameters have default arguments.
8482 We *don't* complain about member template instantiations that
8483 have this form, though; they can occur as we try to decide
8484 what constructor to use during overload resolution. Since
8485 overload resolution will never prefer such a constructor to
8486 the non-template copy constructor (which is either explicitly
8487 or implicitly defined), there's no need to worry about their
8488 existence. Theoretically, they should never even be
8489 instantiated, but that's hard to forestall. */
8490 error ("invalid constructor; you probably meant `%T (const %T&)'",
8498 /* An operator with this code is unary, but can also be binary. */
8501 ambi_op_p (enum tree_code code)
8503 return (code == INDIRECT_REF
8504 || code == ADDR_EXPR
8505 || code == CONVERT_EXPR
8506 || code == NEGATE_EXPR
8507 || code == PREINCREMENT_EXPR
8508 || code == PREDECREMENT_EXPR);
8511 /* An operator with this name can only be unary. */
8514 unary_op_p (enum tree_code code)
8516 return (code == TRUTH_NOT_EXPR
8517 || code == BIT_NOT_EXPR
8518 || code == COMPONENT_REF
8519 || code == TYPE_EXPR);
8522 /* DECL is a declaration for an overloaded operator. Returns true if
8523 the declaration is valid; false otherwise. If COMPLAIN is true,
8524 errors are issued for invalid declarations. */
8527 grok_op_properties (tree decl, int friendp, bool complain)
8529 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
8531 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
8532 tree name = DECL_NAME (decl);
8533 enum tree_code operator_code;
8537 /* Assume that the declaration is valid. */
8540 /* Count the number of arguments. */
8541 for (argtype = argtypes, arity = 0;
8542 argtype && argtype != void_list_node;
8543 argtype = TREE_CHAIN (argtype))
8546 if (current_class_type == NULL_TREE)
8549 if (DECL_CONV_FN_P (decl))
8550 operator_code = TYPE_EXPR;
8554 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8555 if (ansi_opname (CODE) == name) \
8557 operator_code = (CODE); \
8560 else if (ansi_assopname (CODE) == name) \
8562 operator_code = (CODE); \
8563 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8567 #include "operators.def"
8573 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
8574 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8578 switch (operator_code)
8581 TYPE_HAS_NEW_OPERATOR (current_class_type) = 1;
8585 TYPE_GETS_DELETE (current_class_type) |= 1;
8589 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type) = 1;
8592 case VEC_DELETE_EXPR:
8593 TYPE_GETS_DELETE (current_class_type) |= 2;
8601 /* [basic.std.dynamic.allocation]/1:
8603 A program is ill-formed if an allocation function is declared
8604 in a namespace scope other than global scope or declared static
8607 The same also holds true for deallocation functions. */
8608 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
8609 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8611 if (DECL_NAMESPACE_SCOPE_P (decl))
8613 if (CP_DECL_CONTEXT (decl) != global_namespace)
8614 error ("`%D' may not be declared within a namespace", decl);
8615 else if (!TREE_PUBLIC (decl))
8616 error ("`%D' may not be declared as static", decl);
8620 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
8621 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
8622 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8623 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
8626 /* An operator function must either be a non-static member function
8627 or have at least one parameter of a class, a reference to a class,
8628 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8629 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
8631 if (operator_code == TYPE_EXPR
8632 || operator_code == CALL_EXPR
8633 || operator_code == COMPONENT_REF
8634 || operator_code == ARRAY_REF
8635 || operator_code == NOP_EXPR)
8636 error ("`%D' must be a nonstatic member function", decl);
8641 if (DECL_STATIC_FUNCTION_P (decl))
8642 error ("`%D' must be either a non-static member function or a non-member function", decl);
8644 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
8646 tree arg = non_reference (TREE_VALUE (p));
8647 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8648 because these checks are performed even on
8649 template functions. */
8650 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
8654 if (!p || p == void_list_node)
8659 error ("`%D' must have an argument of class or "
8667 /* There are no restrictions on the arguments to an overloaded
8669 if (operator_code == CALL_EXPR)
8672 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
8674 tree t = TREE_TYPE (name);
8677 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
8678 const char *what = 0;
8681 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
8683 if (TREE_CODE (t) == VOID_TYPE)
8685 else if (t == current_class_type)
8686 what = "the same type";
8687 /* Don't force t to be complete here. */
8688 else if (IS_AGGR_TYPE (t)
8689 && COMPLETE_TYPE_P (t)
8690 && DERIVED_FROM_P (t, current_class_type))
8691 what = "a base class";
8693 if (what && warn_conversion)
8694 warning ("conversion to %s%s will never use a type conversion operator",
8695 ref ? "a reference to " : "", what);
8698 if (operator_code == COND_EXPR)
8701 error ("ISO C++ prohibits overloading operator ?:");
8703 else if (ambi_op_p (operator_code))
8706 /* We pick the one-argument operator codes by default, so
8707 we don't have to change anything. */
8709 else if (arity == 2)
8711 /* If we thought this was a unary operator, we now know
8712 it to be a binary operator. */
8713 switch (operator_code)
8716 operator_code = MULT_EXPR;
8720 operator_code = BIT_AND_EXPR;
8724 operator_code = PLUS_EXPR;
8728 operator_code = MINUS_EXPR;
8731 case PREINCREMENT_EXPR:
8732 operator_code = POSTINCREMENT_EXPR;
8735 case PREDECREMENT_EXPR:
8736 operator_code = POSTDECREMENT_EXPR;
8743 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8745 if ((operator_code == POSTINCREMENT_EXPR
8746 || operator_code == POSTDECREMENT_EXPR)
8747 && ! processing_template_decl
8748 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
8751 error ("postfix `%D' must take `int' as its argument",
8755 ("postfix `%D' must take `int' as its second argument",
8762 error ("`%D' must take either zero or one argument", decl);
8764 error ("`%D' must take either one or two arguments", decl);
8767 /* More Effective C++ rule 6. */
8769 && (operator_code == POSTINCREMENT_EXPR
8770 || operator_code == POSTDECREMENT_EXPR
8771 || operator_code == PREINCREMENT_EXPR
8772 || operator_code == PREDECREMENT_EXPR))
8774 tree arg = TREE_VALUE (argtypes);
8775 tree ret = TREE_TYPE (TREE_TYPE (decl));
8776 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
8777 arg = TREE_TYPE (arg);
8778 arg = TYPE_MAIN_VARIANT (arg);
8779 if (operator_code == PREINCREMENT_EXPR
8780 || operator_code == PREDECREMENT_EXPR)
8782 if (TREE_CODE (ret) != REFERENCE_TYPE
8783 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
8785 warning ("prefix `%D' should return `%T'", decl,
8786 build_reference_type (arg));
8790 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
8791 warning ("postfix `%D' should return `%T'", decl, arg);
8795 else if (unary_op_p (operator_code))
8800 error ("`%D' must take `void'", decl);
8802 error ("`%D' must take exactly one argument", decl);
8805 else /* if (binary_op_p (operator_code)) */
8810 error ("`%D' must take exactly one argument", decl);
8812 error ("`%D' must take exactly two arguments", decl);
8815 /* More Effective C++ rule 7. */
8817 && (operator_code == TRUTH_ANDIF_EXPR
8818 || operator_code == TRUTH_ORIF_EXPR
8819 || operator_code == COMPOUND_EXPR))
8820 warning ("user-defined `%D' always evaluates both arguments",
8824 /* Effective C++ rule 23. */
8827 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
8828 && (operator_code == PLUS_EXPR
8829 || operator_code == MINUS_EXPR
8830 || operator_code == TRUNC_DIV_EXPR
8831 || operator_code == MULT_EXPR
8832 || operator_code == TRUNC_MOD_EXPR)
8833 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
8834 warning ("`%D' should return by value", decl);
8837 for (; argtypes && argtypes != void_list_node;
8838 argtypes = TREE_CHAIN (argtypes))
8839 if (TREE_PURPOSE (argtypes))
8841 TREE_PURPOSE (argtypes) = NULL_TREE;
8842 if (operator_code == POSTINCREMENT_EXPR
8843 || operator_code == POSTDECREMENT_EXPR)
8846 pedwarn ("`%D' cannot have default arguments", decl);
8849 error ("`%D' cannot have default arguments", decl);
8858 tag_name (enum tag_types code)
8875 /* Name lookup in an elaborated-type-specifier (after the keyword
8876 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
8877 elaborated-type-specifier is invalid, issue a diagnostic and return
8878 error_mark_node; otherwise, return the *_TYPE to which it referred.
8879 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
8882 check_elaborated_type_specifier (enum tag_types tag_code,
8884 bool allow_template_p)
8890 struct S { struct S *p; };
8892 name lookup will find the TYPE_DECL for the implicit "S::S"
8893 typedef. Adjust for that here. */
8894 if (DECL_SELF_REFERENCE_P (decl))
8895 decl = TYPE_NAME (TREE_TYPE (decl));
8897 type = TREE_TYPE (decl);
8901 If the identifier resolves to a typedef-name or a template
8902 type-parameter, the elaborated-type-specifier is ill-formed.
8904 In other words, the only legitimate declaration to use in the
8905 elaborated type specifier is the implicit typedef created when
8906 the type is declared. */
8907 if (!DECL_IMPLICIT_TYPEDEF_P (decl))
8909 error ("using typedef-name `%D' after `%s'", decl, tag_name (tag_code));
8910 return IS_AGGR_TYPE (type) ? type : error_mark_node;
8913 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8915 error ("using template type parameter `%T' after `%s'",
8916 type, tag_name (tag_code));
8917 return error_mark_node;
8919 else if (TREE_CODE (type) != RECORD_TYPE
8920 && TREE_CODE (type) != UNION_TYPE
8921 && tag_code != enum_type)
8923 error ("`%T' referred to as `%s'", type, tag_name (tag_code));
8924 return error_mark_node;
8926 else if (TREE_CODE (type) != ENUMERAL_TYPE
8927 && tag_code == enum_type)
8929 error ("`%T' referred to as enum", type);
8930 return error_mark_node;
8932 else if (!allow_template_p
8933 && TREE_CODE (type) == RECORD_TYPE
8934 && CLASSTYPE_IS_TEMPLATE (type))
8936 /* If a class template appears as elaborated type specifier
8937 without a template header such as:
8939 template <class T> class C {};
8940 void f(class C); // No template header here
8942 then the required template argument is missing. */
8944 error ("template argument required for `%s %T'",
8945 tag_name (tag_code),
8946 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
8947 return error_mark_node;
8953 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
8954 Define the tag as a forward-reference if it is not defined.
8956 If a declaration is given, process it here, and report an error if
8957 multiple declarations are not identical.
8959 GLOBALIZE is false when this is also a definition. Only look in
8960 the current frame for the name (since C++ allows new names in any
8963 TEMPLATE_HEADER_P is true when this declaration is preceded by
8964 a set of template parameters. */
8967 xref_tag (enum tag_types tag_code, tree name,
8968 bool globalize, bool template_header_p)
8970 enum tree_code code;
8972 struct cp_binding_level *b = current_binding_level;
8973 tree context = NULL_TREE;
8975 timevar_push (TV_NAME_LOOKUP);
8977 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
8989 code = ENUMERAL_TYPE;
8997 /* If we know we are defining this tag, only look it up in
8998 this scope and don't try to find it as a type. */
8999 t = lookup_tag (code, name, b, 1);
9003 tree decl = lookup_name (name, 2);
9005 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9006 decl = DECL_TEMPLATE_RESULT (decl);
9008 if (decl && TREE_CODE (decl) == TYPE_DECL)
9010 /* Two cases we need to consider when deciding if a class
9011 template is allowed as an elaborated type specifier:
9012 1. It is a self reference to its own class.
9013 2. It comes with a template header.
9017 template <class T> class C {
9018 class C *c1; // DECL_SELF_REFERENCE_P is true
9021 template <class U> class C; // template_header_p is true
9022 template <class T> class C<T>::D {
9023 class C *c2; // DECL_SELF_REFERENCE_P is true
9026 t = check_elaborated_type_specifier (tag_code,
9029 | DECL_SELF_REFERENCE_P (decl));
9030 if (t == error_mark_node)
9031 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9036 if (t && current_class_type
9037 && template_class_depth (current_class_type)
9038 && template_header_p)
9040 /* Since GLOBALIZE is nonzero, we are not looking at a
9041 definition of this tag. Since, in addition, we are currently
9042 processing a (member) template declaration of a template
9043 class, we must be very careful; consider:
9050 { template <class V>
9051 friend struct S1; };
9053 Here, the S2::S1 declaration should not be confused with the
9054 outer declaration. In particular, the inner version should
9055 have a template parameter of level 2, not level 1. This
9056 would be particularly important if the member declaration
9059 template <class V = U> friend struct S1;
9061 say, when we should tsubst into `U' when instantiating
9062 S2. On the other hand, when presented with:
9072 we must find the inner binding eventually. We
9073 accomplish this by making sure that the new type we
9074 create to represent this declaration has the right
9076 context = TYPE_CONTEXT (t);
9083 /* If no such tag is yet defined, create a forward-reference node
9084 and record it as the "definition".
9085 When a real declaration of this type is found,
9086 the forward-reference will be altered into a real type. */
9087 if (code == ENUMERAL_TYPE)
9089 error ("use of enum `%#D' without previous declaration", name);
9090 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9094 t = make_aggr_type (code);
9095 TYPE_CONTEXT (t) = context;
9096 pushtag (name, t, globalize);
9101 if (!globalize && processing_template_decl && IS_AGGR_TYPE (t))
9102 redeclare_class_template (t, current_template_parms);
9103 else if (!processing_template_decl
9105 && CLASSTYPE_IS_TEMPLATE (t))
9107 error ("redeclaration of `%T' as a non-template", t);
9108 t = error_mark_node;
9112 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9116 xref_tag_from_type (tree old, tree id, int globalize)
9118 enum tag_types tag_kind;
9120 if (TREE_CODE (old) == RECORD_TYPE)
9121 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9123 tag_kind = union_type;
9125 if (id == NULL_TREE)
9126 id = TYPE_IDENTIFIER (old);
9128 return xref_tag (tag_kind, id, globalize, false);
9131 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9132 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9133 access_* node, and the TREE_VALUE is the type of the base-class.
9134 Non-NULL TREE_TYPE indicates virtual inheritance. */
9137 xref_basetypes (tree ref, tree base_list)
9140 tree binfo, base_binfo;
9141 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9142 unsigned max_bases = 0; /* Maximum direct bases. */
9144 tree default_access;
9145 tree igo_prev; /* Track Inheritance Graph Order. */
9147 if (ref == error_mark_node)
9150 /* The base of a derived class is private by default, all others are
9152 default_access = (TREE_CODE (ref) == RECORD_TYPE
9153 && CLASSTYPE_DECLARED_CLASS (ref)
9154 ? access_private_node : access_public_node);
9156 /* First, make sure that any templates in base-classes are
9157 instantiated. This ensures that if we call ourselves recursively
9158 we do not get confused about which classes are marked and which
9163 tree basetype = TREE_VALUE (*basep);
9165 if (!(processing_template_decl && uses_template_parms (basetype))
9166 && !complete_type_or_else (basetype, NULL))
9167 /* An incomplete type. Remove it from the list. */
9168 *basep = TREE_CHAIN (*basep);
9172 if (TREE_TYPE (*basep))
9174 if (CLASS_TYPE_P (basetype))
9175 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9176 basep = &TREE_CHAIN (*basep);
9180 SET_CLASSTYPE_MARKED (ref);
9182 /* The binfo slot should be empty, unless this is an (ill-formed)
9184 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9185 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9187 binfo = make_tree_binfo (max_bases);
9189 TYPE_BINFO (ref) = binfo;
9190 BINFO_OFFSET (binfo) = size_zero_node;
9191 BINFO_TYPE (binfo) = ref;
9195 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, max_bases);
9196 /* An aggregate cannot have baseclasses. */
9197 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9199 if (TREE_CODE (ref) == UNION_TYPE)
9200 error ("derived union `%T' invalid", ref);
9205 TYPE_USES_MULTIPLE_INHERITANCE (ref) = 1;
9206 /* If there is more than one non-empty they cannot be at the
9208 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
9210 if (TYPE_FOR_JAVA (ref))
9211 error ("Java class '%T' cannot have multiple bases", ref);
9216 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, max_vbases);
9217 TYPE_USES_VIRTUAL_BASECLASSES (ref) = 1;
9218 /* Converting to a virtual base class requires looking up the
9219 offset of the virtual base. */
9220 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
9222 if (TYPE_FOR_JAVA (ref))
9223 error ("Java class '%T' cannot have virtual bases", ref);
9226 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9228 tree access = TREE_PURPOSE (base_list);
9229 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9230 tree basetype = TREE_VALUE (base_list);
9232 if (access == access_default_node)
9233 access = default_access;
9235 if (TREE_CODE (basetype) == TYPE_DECL)
9236 basetype = TREE_TYPE (basetype);
9237 if (TREE_CODE (basetype) != RECORD_TYPE
9238 && TREE_CODE (basetype) != TYPENAME_TYPE
9239 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9240 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9242 error ("base type `%T' fails to be a struct or class type",
9247 if (CLASSTYPE_MARKED (basetype))
9249 if (basetype == ref)
9250 error ("recursive type `%T' undefined", basetype);
9252 error ("duplicate base type `%T' invalid", basetype);
9255 SET_CLASSTYPE_MARKED (basetype);
9257 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9258 TYPE_FOR_JAVA (ref) = 1;
9260 base_binfo = NULL_TREE;
9261 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9263 base_binfo = TYPE_BINFO (basetype);
9264 /* The original basetype could have been a typedef'd type. */
9265 basetype = BINFO_TYPE (base_binfo);
9267 /* Inherit flags from the base. */
9268 TYPE_HAS_NEW_OPERATOR (ref)
9269 |= TYPE_HAS_NEW_OPERATOR (basetype);
9270 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9271 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9272 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9273 TYPE_USES_MULTIPLE_INHERITANCE (ref)
9274 |= TYPE_USES_MULTIPLE_INHERITANCE (basetype);
9275 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref)
9276 |= TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (basetype);
9277 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9280 base_binfo = copy_binfo (base_binfo, basetype, ref,
9281 &igo_prev, via_virtual);
9282 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9283 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9285 BINFO_BASE_APPEND (binfo, base_binfo);
9286 BINFO_BASE_ACCESS_APPEND (binfo, access);
9289 /* Unmark all the types. */
9290 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9291 CLEAR_CLASSTYPE_MARKED (BINFO_TYPE (base_binfo));
9292 CLEAR_CLASSTYPE_MARKED (ref);
9296 /* Begin compiling the definition of an enumeration type.
9297 NAME is its name (or null if anonymous).
9298 Returns the type object, as yet incomplete.
9299 Also records info about it so that build_enumerator
9300 may be used to declare the individual values as they are read. */
9303 start_enum (tree name)
9305 tree enumtype = NULL_TREE;
9306 struct cp_binding_level *b = current_binding_level;
9308 /* If this is the real definition for a previous forward reference,
9309 fill in the contents in the same object that used to be the
9310 forward reference. */
9312 if (name != NULL_TREE)
9313 enumtype = lookup_tag (ENUMERAL_TYPE, name, b, 1);
9315 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9317 error ("multiple definition of `%#T'", enumtype);
9318 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9319 /* Clear out TYPE_VALUES, and start again. */
9320 TYPE_VALUES (enumtype) = NULL_TREE;
9324 enumtype = make_node (ENUMERAL_TYPE);
9325 pushtag (name, enumtype, 0);
9331 /* After processing and defining all the values of an enumeration type,
9332 install their decls in the enumeration type and finish it off.
9333 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9336 finish_enum (tree enumtype)
9348 integer_type_kind itk;
9349 tree underlying_type = NULL_TREE;
9351 /* We built up the VALUES in reverse order. */
9352 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9354 /* For an enum defined in a template, just set the type of the values;
9355 all further processing is postponed until the template is
9356 instantiated. We need to set the type so that tsubst of a CONST_DECL
9358 if (processing_template_decl)
9360 for (values = TYPE_VALUES (enumtype);
9362 values = TREE_CHAIN (values))
9363 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9364 if (at_function_scope_p ())
9365 add_stmt (build_min (TAG_DEFN, enumtype));
9369 /* Determine the minimum and maximum values of the enumerators. */
9370 if (TYPE_VALUES (enumtype))
9372 minnode = maxnode = NULL_TREE;
9374 for (values = TYPE_VALUES (enumtype);
9376 values = TREE_CHAIN (values))
9378 decl = TREE_VALUE (values);
9380 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9381 each enumerator has the type of its enumeration. Prior to the
9382 closing brace, the type of each enumerator is the type of its
9383 initializing value. */
9384 TREE_TYPE (decl) = enumtype;
9386 /* Update the minimum and maximum values, if appropriate. */
9387 value = DECL_INITIAL (decl);
9388 /* Figure out what the minimum and maximum values of the
9391 minnode = maxnode = value;
9392 else if (tree_int_cst_lt (maxnode, value))
9394 else if (tree_int_cst_lt (value, minnode))
9401 If the enumerator-list is empty, the underlying type is as if
9402 the enumeration had a single enumerator with value 0. */
9403 minnode = maxnode = integer_zero_node;
9405 /* Compute the number of bits require to represent all values of the
9406 enumeration. We must do this before the type of MINNODE and
9407 MAXNODE are transformed, since min_precision relies on the
9408 TREE_TYPE of the value it is passed. */
9409 unsignedp = tree_int_cst_sgn (minnode) >= 0;
9410 lowprec = min_precision (minnode, unsignedp);
9411 highprec = min_precision (maxnode, unsignedp);
9412 precision = MAX (lowprec, highprec);
9414 /* Determine the underlying type of the enumeration.
9418 The underlying type of an enumeration is an integral type that
9419 can represent all the enumerator values defined in the
9420 enumeration. It is implementation-defined which integral type is
9421 used as the underlying type for an enumeration except that the
9422 underlying type shall not be larger than int unless the value of
9423 an enumerator cannot fit in an int or unsigned int.
9425 We use "int" or an "unsigned int" as the underlying type, even if
9426 a smaller integral type would work, unless the user has
9427 explicitly requested that we use the smallest possible type. */
9428 for (itk = (flag_short_enums ? itk_char : itk_int);
9432 underlying_type = integer_types[itk];
9433 if (TYPE_PRECISION (underlying_type) >= precision
9434 && TYPE_UNSIGNED (underlying_type) == unsignedp)
9437 if (itk == itk_none)
9441 IF no integral type can represent all the enumerator values, the
9442 enumeration is ill-formed. */
9443 error ("no integral type can represent all of the enumerator values "
9444 "for `%T'", enumtype);
9445 precision = TYPE_PRECISION (long_long_integer_type_node);
9446 underlying_type = integer_types[itk_unsigned_long_long];
9449 /* Compute the minium and maximum values for the type.
9453 For an enumeration where emin is the smallest enumerator and emax
9454 is the largest, the values of the enumeration are the values of the
9455 underlying type in the range bmin to bmax, where bmin and bmax are,
9456 respectively, the smallest and largest values of the smallest bit-
9457 field that can store emin and emax. */
9459 /* The middle-end currently assumes that types with TYPE_PRECISION
9460 narrower than their underlying type are suitably zero or sign
9461 extended to fill their mode. g++ doesn't make these guarantees.
9462 Until the middle-end can represent such paradoxical types, we
9463 set the TYPE_PRECISION to the width of the underlying type. */
9464 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
9466 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
9470 The value of sizeof() applied to an enumeration type, an object
9471 of an enumeration type, or an enumerator, is the value of sizeof()
9472 applied to the underlying type. */
9473 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
9474 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
9475 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
9476 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
9477 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
9478 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
9480 /* Convert each of the enumerators to the type of the underlying
9481 type of the enumeration. */
9482 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
9484 decl = TREE_VALUE (values);
9485 value = perform_implicit_conversion (underlying_type,
9486 DECL_INITIAL (decl));
9488 /* Do not clobber shared ints. */
9489 value = copy_node (value);
9491 TREE_TYPE (value) = enumtype;
9492 DECL_INITIAL (decl) = value;
9493 TREE_VALUE (values) = value;
9496 /* Fix up all variant types of this enum type. */
9497 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
9499 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
9500 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
9501 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
9502 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
9503 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
9504 TYPE_MODE (t) = TYPE_MODE (enumtype);
9505 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
9506 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
9507 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
9508 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
9511 /* Finish debugging output for this type. */
9512 rest_of_type_compilation (enumtype, namespace_bindings_p ());
9515 /* Build and install a CONST_DECL for an enumeration constant of the
9516 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9517 Assignment of sequential values by default is handled here. */
9520 build_enumerator (tree name, tree value, tree enumtype)
9526 /* Remove no-op casts from the value. */
9528 STRIP_TYPE_NOPS (value);
9530 if (! processing_template_decl)
9532 /* Validate and default VALUE. */
9533 if (value != NULL_TREE)
9535 value = decl_constant_value (value);
9537 if (TREE_CODE (value) == INTEGER_CST)
9539 value = perform_integral_promotions (value);
9540 constant_expression_warning (value);
9544 error ("enumerator value for `%D' not integer constant", name);
9549 /* Default based on previous value. */
9550 if (value == NULL_TREE)
9552 if (TYPE_VALUES (enumtype))
9555 unsigned HOST_WIDE_INT lo;
9559 /* The next value is the previous value plus one. We can
9560 safely assume that the previous value is an INTEGER_CST.
9561 add_double doesn't know the type of the target expression,
9562 so we must check with int_fits_type_p as well. */
9563 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
9564 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
9565 TREE_INT_CST_HIGH (prev_value),
9567 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
9568 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
9571 error ("overflow in enumeration values at `%D'", name);
9574 value = integer_zero_node;
9577 /* Remove no-op casts from the value. */
9578 STRIP_TYPE_NOPS (value);
9581 /* C++ associates enums with global, function, or class declarations. */
9582 context = current_scope ();
9584 context = current_namespace;
9586 /* Build the actual enumeration constant. Note that the enumeration
9587 constants have the type of their initializers until the
9588 enumeration is complete:
9592 Following the closing brace of an enum-specifier, each enumer-
9593 ator has the type of its enumeration. Prior to the closing
9594 brace, the type of each enumerator is the type of its
9597 In finish_enum we will reset the type. Of course, if we're
9598 processing a template, there may be no value. */
9599 type = value ? TREE_TYPE (value) : NULL_TREE;
9601 if (context && context == current_class_type)
9602 /* This enum declaration is local to the class. We need the full
9603 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9604 decl = build_lang_decl (CONST_DECL, name, type);
9606 /* It's a global enum, or it's local to a function. (Note local to
9607 a function could mean local to a class method. */
9608 decl = build_decl (CONST_DECL, name, type);
9610 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
9611 TREE_CONSTANT (decl) = 1;
9612 TREE_INVARIANT (decl) = 1;
9613 TREE_READONLY (decl) = 1;
9614 DECL_INITIAL (decl) = value;
9616 if (context && context == current_class_type)
9617 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9618 on the TYPE_FIELDS list for `S'. (That's so that you can say
9619 things like `S::i' later.) */
9620 finish_member_declaration (decl);
9624 /* Add this enumeration constant to the list for this type. */
9625 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
9629 /* We're defining DECL. Make sure that it's type is OK. */
9632 check_function_type (tree decl, tree current_function_parms)
9634 tree fntype = TREE_TYPE (decl);
9635 tree return_type = complete_type (TREE_TYPE (fntype));
9637 /* In a function definition, arg types must be complete. */
9638 require_complete_types_for_parms (current_function_parms);
9640 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
9642 error ("return type `%#T' is incomplete", TREE_TYPE (fntype));
9644 /* Make it return void instead, but don't change the
9645 type of the DECL_RESULT, in case we have a named return value. */
9646 if (TREE_CODE (fntype) == METHOD_TYPE)
9648 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
9650 = build_method_type_directly (ctype,
9652 FUNCTION_ARG_CHAIN (decl));
9656 = build_function_type (void_type_node,
9657 TYPE_ARG_TYPES (TREE_TYPE (decl)));
9659 = build_exception_variant (fntype,
9660 TYPE_RAISES_EXCEPTIONS (fntype));
9663 abstract_virtuals_error (decl, TREE_TYPE (fntype));
9666 /* Create the FUNCTION_DECL for a function definition.
9667 DECLSPECS and DECLARATOR are the parts of the declaration;
9668 they describe the function's name and the type it returns,
9669 but twisted together in a fashion that parallels the syntax of C.
9671 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9672 DECLARATOR is really the DECL for the function we are about to
9673 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9674 indicating that the function is an inline defined in-class.
9676 This function creates a binding context for the function body
9677 as well as setting up the FUNCTION_DECL in current_function_decl.
9679 For C++, we must first check whether that datum makes any sense.
9680 For example, "class A local_a(1,2);" means that variable local_a
9681 is an aggregate of type A, which should have a constructor
9682 applied to it with the argument list [1, 2]. */
9685 start_preparsed_function (tree decl1, tree attrs, int flags)
9687 tree ctype = NULL_TREE;
9690 int doing_friend = 0;
9691 struct cp_binding_level *bl;
9692 tree current_function_parms;
9693 struct c_fileinfo *finfo = get_fileinfo (input_filename);
9696 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
9697 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
9699 fntype = TREE_TYPE (decl1);
9700 if (TREE_CODE (fntype) == METHOD_TYPE)
9701 ctype = TYPE_METHOD_BASETYPE (fntype);
9703 /* ISO C++ 11.4/5. A friend function defined in a class is in
9704 the (lexical) scope of the class in which it is defined. */
9705 if (!ctype && DECL_FRIEND_P (decl1))
9707 ctype = DECL_FRIEND_CONTEXT (decl1);
9709 /* CTYPE could be null here if we're dealing with a template;
9710 for example, `inline friend float foo()' inside a template
9711 will have no CTYPE set. */
9712 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
9718 if (DECL_DECLARED_INLINE_P (decl1)
9719 && lookup_attribute ("noinline", attrs))
9720 warning ("%Jinline function '%D' given attribute noinline", decl1, decl1);
9722 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
9723 /* This is a constructor, we must ensure that any default args
9724 introduced by this definition are propagated to the clones
9725 now. The clones are used directly in overload resolution. */
9726 adjust_clone_args (decl1);
9728 /* Sometimes we don't notice that a function is a static member, and
9729 build a METHOD_TYPE for it. Fix that up now. */
9730 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
9731 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
9733 revert_static_member_fn (decl1);
9737 /* Set up current_class_type, and enter the scope of the class, if
9740 push_nested_class (ctype);
9741 else if (DECL_STATIC_FUNCTION_P (decl1))
9742 push_nested_class (DECL_CONTEXT (decl1));
9744 /* Now that we have entered the scope of the class, we must restore
9745 the bindings for any template parameters surrounding DECL1, if it
9746 is an inline member template. (Order is important; consider the
9747 case where a template parameter has the same name as a field of
9748 the class.) It is not until after this point that
9749 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
9750 if (flags & SF_INCLASS_INLINE)
9751 maybe_begin_member_template_processing (decl1);
9753 /* Effective C++ rule 15. */
9755 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
9756 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
9757 warning ("`operator=' should return a reference to `*this'");
9759 /* Make the init_value nonzero so pushdecl knows this is not tentative.
9760 error_mark_node is replaced below (in poplevel) with the BLOCK. */
9761 if (!DECL_INITIAL (decl1))
9762 DECL_INITIAL (decl1) = error_mark_node;
9764 /* This function exists in static storage.
9765 (This does not mean `static' in the C sense!) */
9766 TREE_STATIC (decl1) = 1;
9768 /* We must call push_template_decl after current_class_type is set
9769 up. (If we are processing inline definitions after exiting a
9770 class scope, current_class_type will be NULL_TREE until set above
9771 by push_nested_class.) */
9772 if (processing_template_decl)
9773 decl1 = push_template_decl (decl1);
9775 /* We are now in the scope of the function being defined. */
9776 current_function_decl = decl1;
9778 /* Save the parm names or decls from this function's declarator
9779 where store_parm_decls will find them. */
9780 current_function_parms = DECL_ARGUMENTS (decl1);
9782 /* Make sure the parameter and return types are reasonable. When
9783 you declare a function, these types can be incomplete, but they
9784 must be complete when you define the function. */
9785 if (! processing_template_decl)
9786 check_function_type (decl1, current_function_parms);
9788 /* Build the return declaration for the function. */
9789 restype = TREE_TYPE (fntype);
9790 /* Promote the value to int before returning it. */
9791 if (c_promoting_integer_type_p (restype))
9792 restype = type_promotes_to (restype);
9793 if (DECL_RESULT (decl1) == NULL_TREE)
9797 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
9798 DECL_ARTIFICIAL (resdecl) = 1;
9799 DECL_IGNORED_P (resdecl) = 1;
9800 DECL_RESULT (decl1) = resdecl;
9802 c_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
9805 /* Initialize RTL machinery. We cannot do this until
9806 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
9807 even when processing a template; this is how we get
9808 CFUN set up, and our per-function variables initialized.
9809 FIXME factor out the non-RTL stuff. */
9810 bl = current_binding_level;
9811 allocate_struct_function (decl1);
9812 current_binding_level = bl;
9814 /* Even though we're inside a function body, we still don't want to
9815 call expand_expr to calculate the size of a variable-sized array.
9816 We haven't necessarily assigned RTL to all variables yet, so it's
9817 not safe to try to expand expressions involving them. */
9818 cfun->x_dont_save_pending_sizes_p = 1;
9820 /* Start the statement-tree, start the tree now. */
9821 DECL_SAVED_TREE (decl1) = push_stmt_list ();
9823 /* Let the user know we're compiling this function. */
9824 announce_function (decl1);
9826 /* Record the decl so that the function name is defined.
9827 If we already have a decl for this name, and it is a FUNCTION_DECL,
9828 use the old decl. */
9829 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
9831 /* A specialization is not used to guide overload resolution. */
9832 if (!DECL_FUNCTION_MEMBER_P (decl1)
9833 && !(DECL_USE_TEMPLATE (decl1) &&
9834 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
9836 tree olddecl = pushdecl (decl1);
9838 if (olddecl == error_mark_node)
9839 /* If something went wrong when registering the declaration,
9840 use DECL1; we have to have a FUNCTION_DECL to use when
9841 parsing the body of the function. */
9844 /* Otherwise, OLDDECL is either a previous declaration of
9845 the same function or DECL1 itself. */
9850 /* We need to set the DECL_CONTEXT. */
9851 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
9852 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
9853 /* And make sure we have enough default args. */
9854 check_default_args (decl1);
9856 fntype = TREE_TYPE (decl1);
9859 /* Determine the ELF visibility attribute for the function. We must
9860 not do this before calling "pushdecl", as we must allow
9861 "duplicate_decls" to merge any attributes appropriately. */
9862 if (!DECL_CLONED_FUNCTION_P (decl1))
9863 determine_visibility (decl1);
9865 /* Reset these in case the call to pushdecl changed them. */
9866 current_function_decl = decl1;
9869 /* If we are (erroneously) defining a function that we have already
9870 defined before, wipe out what we knew before. */
9871 if (!DECL_PENDING_INLINE_P (decl1))
9872 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
9874 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
9876 /* We know that this was set up by `grokclassfn'. We do not
9877 wait until `store_parm_decls', since evil parse errors may
9878 never get us to that point. Here we keep the consistency
9879 between `current_class_type' and `current_class_ptr'. */
9880 tree t = DECL_ARGUMENTS (decl1);
9882 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
9883 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
9885 cp_function_chain->x_current_class_ref
9886 = build_indirect_ref (t, NULL);
9887 cp_function_chain->x_current_class_ptr = t;
9889 /* Constructors and destructors need to know whether they're "in
9890 charge" of initializing virtual base classes. */
9892 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
9894 current_in_charge_parm = t;
9897 if (DECL_HAS_VTT_PARM_P (decl1))
9899 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
9900 current_vtt_parm = t;
9904 if (DECL_INTERFACE_KNOWN (decl1))
9906 tree ctx = decl_function_context (decl1);
9908 if (DECL_NOT_REALLY_EXTERN (decl1))
9909 DECL_EXTERNAL (decl1) = 0;
9911 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
9912 && TREE_PUBLIC (ctx))
9913 /* This is a function in a local class in an extern inline
9915 comdat_linkage (decl1);
9917 /* If this function belongs to an interface, it is public.
9918 If it belongs to someone else's interface, it is also external.
9919 This only affects inlines and template instantiations. */
9920 else if (finfo->interface_unknown == 0
9921 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
9923 if (DECL_DECLARED_INLINE_P (decl1)
9924 || DECL_TEMPLATE_INSTANTIATION (decl1)
9925 || processing_template_decl)
9927 DECL_EXTERNAL (decl1)
9928 = (finfo->interface_only
9929 || (DECL_DECLARED_INLINE_P (decl1)
9930 && ! flag_implement_inlines
9931 && !DECL_VINDEX (decl1)));
9933 /* For WIN32 we also want to put these in linkonce sections. */
9934 maybe_make_one_only (decl1);
9937 DECL_EXTERNAL (decl1) = 0;
9938 DECL_NOT_REALLY_EXTERN (decl1) = 0;
9939 DECL_INTERFACE_KNOWN (decl1) = 1;
9940 /* If this function is in an interface implemented in this file,
9941 make sure that the backend knows to emit this function
9943 if (!DECL_EXTERNAL (decl1))
9944 mark_needed (decl1);
9946 else if (finfo->interface_unknown && finfo->interface_only
9947 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
9949 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
9950 interface, we will have both finfo->interface_unknown and
9951 finfo->interface_only set. In that case, we don't want to
9952 use the normal heuristics because someone will supply a
9953 #pragma implementation elsewhere, and deducing it here would
9954 produce a conflict. */
9955 comdat_linkage (decl1);
9956 DECL_EXTERNAL (decl1) = 0;
9957 DECL_INTERFACE_KNOWN (decl1) = 1;
9958 DECL_DEFER_OUTPUT (decl1) = 1;
9962 /* This is a definition, not a reference.
9963 So clear DECL_EXTERNAL. */
9964 DECL_EXTERNAL (decl1) = 0;
9966 if ((DECL_DECLARED_INLINE_P (decl1)
9967 || DECL_TEMPLATE_INSTANTIATION (decl1))
9968 && ! DECL_INTERFACE_KNOWN (decl1)
9969 /* Don't try to defer nested functions for now. */
9970 && ! decl_function_context (decl1))
9971 DECL_DEFER_OUTPUT (decl1) = 1;
9973 DECL_INTERFACE_KNOWN (decl1) = 1;
9976 begin_scope (sk_function_parms, decl1);
9980 if (DECL_DESTRUCTOR_P (decl1)
9981 || (DECL_CONSTRUCTOR_P (decl1)
9982 && targetm.cxx.cdtor_returns_this ()))
9984 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
9985 DECL_CONTEXT (cdtor_label) = current_function_decl;
9988 start_fname_decls ();
9990 store_parm_decls (current_function_parms);
9994 /* Like start_preparsed_function, except that instead of a
9995 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
9997 Returns 1 on success. If the DECLARATOR is not suitable for a function
9998 (it defines a datum instead), we return 0, which tells
9999 yyparse to report a parse error. */
10002 start_function (cp_decl_specifier_seq *declspecs,
10003 const cp_declarator *declarator,
10008 if (have_extern_spec)
10010 declspecs->storage_class = sc_extern;
10011 /* This should only be done once on the outermost decl. */
10012 have_extern_spec = false;
10015 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10016 /* If the declarator is not suitable for a function definition,
10017 cause a syntax error. */
10018 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10021 cplus_decl_attributes (&decl1, attrs, 0);
10023 /* If #pragma weak was used, mark the decl weak now. */
10024 if (global_scope_p (current_binding_level))
10025 maybe_apply_pragma_weak (decl1);
10027 if (DECL_MAIN_P (decl1))
10029 /* If this doesn't return integer_type, or a typedef to
10030 integer_type, complain. */
10031 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl1)), integer_type_node))
10033 if (pedantic || warn_return_type)
10034 pedwarn ("return type for `main' changed to `int'");
10035 TREE_TYPE (decl1) = default_function_type;
10039 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10044 /* Store the parameter declarations into the current function declaration.
10045 This is called after parsing the parameter declarations, before
10046 digesting the body of the function.
10048 Also install to binding contour return value identifier, if any. */
10051 store_parm_decls (tree current_function_parms)
10053 tree fndecl = current_function_decl;
10056 /* This is a chain of any other decls that came in among the parm
10057 declarations. If a parm is declared with enum {foo, bar} x;
10058 then CONST_DECLs for foo and bar are put here. */
10059 tree nonparms = NULL_TREE;
10061 if (current_function_parms)
10063 /* This case is when the function was defined with an ANSI prototype.
10064 The parms already have decls, so we need not do anything here
10065 except record them as in effect
10066 and complain if any redundant old-style parm decls were written. */
10068 tree specparms = current_function_parms;
10071 /* Must clear this because it might contain TYPE_DECLs declared
10073 current_binding_level->names = NULL;
10075 /* If we're doing semantic analysis, then we'll call pushdecl
10076 for each of these. We must do them in reverse order so that
10077 they end in the correct forward order. */
10078 specparms = nreverse (specparms);
10080 for (parm = specparms; parm; parm = next)
10082 next = TREE_CHAIN (parm);
10083 if (TREE_CODE (parm) == PARM_DECL)
10085 if (DECL_NAME (parm) == NULL_TREE
10086 || TREE_CODE (parm) != VOID_TYPE)
10089 error ("parameter `%D' declared void", parm);
10093 /* If we find an enum constant or a type tag,
10094 put it aside for the moment. */
10095 TREE_CHAIN (parm) = NULL_TREE;
10096 nonparms = chainon (nonparms, parm);
10100 /* Get the decls in their original chain order and record in the
10101 function. This is all and only the PARM_DECLs that were
10102 pushed into scope by the loop above. */
10103 DECL_ARGUMENTS (fndecl) = getdecls ();
10106 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10108 /* Now store the final chain of decls for the arguments
10109 as the decl-chain of the current lexical scope.
10110 Put the enumerators in as well, at the front so that
10111 DECL_ARGUMENTS is not modified. */
10112 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10114 /* For a cloned function, we've already got all the code we need;
10115 there's no need to add any extra bits. */
10116 if (!DECL_CLONED_FUNCTION_P (fndecl))
10118 /* Do the starting of the exception specifications, if we have any. */
10119 if (flag_exceptions && !processing_template_decl
10120 && flag_enforce_eh_specs
10121 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10122 current_eh_spec_block = begin_eh_spec_block ();
10127 /* We have finished doing semantic analysis on DECL, but have not yet
10128 generated RTL for its body. Save away our current state, so that
10129 when we want to generate RTL later we know what to do. */
10132 save_function_data (tree decl)
10134 struct language_function *f;
10136 /* Save the language-specific per-function data so that we can
10137 get it back when we really expand this function. */
10138 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10141 f = GGC_NEW (struct language_function);
10142 memcpy (f, cp_function_chain, sizeof (struct language_function));
10143 DECL_SAVED_FUNCTION_DATA (decl) = f;
10145 /* Clear out the bits we don't need. */
10146 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10147 f->x_named_label_uses = NULL;
10148 f->bindings = NULL;
10149 f->x_local_names = NULL;
10153 /* Set the return value of the constructor (if present). */
10156 finish_constructor_body (void)
10161 if (targetm.cxx.cdtor_returns_this ())
10163 /* Any return from a constructor will end up here. */
10164 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10166 val = DECL_ARGUMENTS (current_function_decl);
10167 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10168 DECL_RESULT (current_function_decl), val);
10169 /* Return the address of the object. */
10170 exprstmt = build_stmt (RETURN_EXPR, val);
10171 add_stmt (exprstmt);
10175 /* Do all the processing for the beginning of a destructor; set up the
10176 vtable pointers and cleanups for bases and members. */
10179 begin_destructor_body (void)
10182 tree compound_stmt;
10184 /* If the dtor is empty, and we know there is not any possible
10185 way we could use any vtable entries, before they are possibly
10186 set by a base class dtor, we don't have to setup the vtables,
10187 as we know that any base class dtor will set up any vtables
10188 it needs. We avoid MI, because one base class dtor can do a
10189 virtual dispatch to an overridden function that would need to
10190 have a non-related vtable set up, we cannot avoid setting up
10191 vtables in that case. We could change this to see if there
10192 is just one vtable.
10194 ??? In the destructor for a class, the vtables are set
10195 appropriately for that class. There will be no non-related
10196 vtables. jason 2001-12-11. */
10197 if_stmt = begin_if_stmt ();
10199 /* If it is not safe to avoid setting up the vtables, then
10200 someone will change the condition to be boolean_true_node.
10201 (Actually, for now, we do not have code to set the condition
10202 appropriately, so we just assume that we always need to
10203 initialize the vtables.) */
10204 finish_if_stmt_cond (boolean_true_node, if_stmt);
10206 compound_stmt = begin_compound_stmt (0);
10208 /* Make all virtual function table pointers in non-virtual base
10209 classes point to CURRENT_CLASS_TYPE's virtual function
10211 initialize_vtbl_ptrs (current_class_ptr);
10213 finish_compound_stmt (compound_stmt);
10214 finish_then_clause (if_stmt);
10215 finish_if_stmt (if_stmt);
10217 /* And insert cleanups for our bases and members so that they
10218 will be properly destroyed if we throw. */
10219 push_base_cleanups ();
10222 /* At the end of every destructor we generate code to delete the object if
10223 necessary. Do that now. */
10226 finish_destructor_body (void)
10230 /* Any return from a destructor will end up here; that way all base
10231 and member cleanups will be run when the function returns. */
10232 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10234 /* In a virtual destructor, we must call delete. */
10235 if (DECL_VIRTUAL_P (current_function_decl))
10238 tree virtual_size = cxx_sizeof (current_class_type);
10242 At the point of definition of a virtual destructor (including
10243 an implicit definition), non-placement operator delete shall
10244 be looked up in the scope of the destructor's class and if
10245 found shall be accessible and unambiguous. */
10246 exprstmt = build_op_delete_call
10247 (DELETE_EXPR, current_class_ptr, virtual_size,
10248 /*global_p=*/false, NULL_TREE);
10250 if_stmt = begin_if_stmt ();
10251 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10252 current_in_charge_parm,
10255 finish_expr_stmt (exprstmt);
10256 finish_then_clause (if_stmt);
10257 finish_if_stmt (if_stmt);
10260 if (targetm.cxx.cdtor_returns_this ())
10264 val = DECL_ARGUMENTS (current_function_decl);
10265 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10266 DECL_RESULT (current_function_decl), val);
10267 /* Return the address of the object. */
10268 exprstmt = build_stmt (RETURN_EXPR, val);
10269 add_stmt (exprstmt);
10273 /* Do the necessary processing for the beginning of a function body, which
10274 in this case includes member-initializers, but not the catch clauses of
10275 a function-try-block. Currently, this means opening a binding level
10276 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10277 In other functions, this isn't necessary, but it doesn't hurt. */
10280 begin_function_body (void)
10284 if (processing_template_decl)
10285 /* Do nothing now. */;
10287 /* Always keep the BLOCK node associated with the outermost pair of
10288 curly braces of a function. These are needed for correct
10289 operation of dwarfout.c. */
10290 keep_next_level (true);
10292 stmt = begin_compound_stmt (BCS_FN_BODY);
10294 if (processing_template_decl)
10295 /* Do nothing now. */;
10296 else if (DECL_DESTRUCTOR_P (current_function_decl))
10297 begin_destructor_body ();
10302 /* Do the processing for the end of a function body. Currently, this means
10303 closing out the cleanups for fully-constructed bases and members, and in
10304 the case of the destructor, deleting the object if desired. Again, this
10305 is only meaningful for [cd]tors, since they are the only functions where
10306 there is a significant distinction between the main body and any
10307 function catch clauses. Handling, say, main() return semantics here
10308 would be wrong, as flowing off the end of a function catch clause for
10309 main() would also need to return 0. */
10312 finish_function_body (tree compstmt)
10314 /* Close the block. */
10315 finish_compound_stmt (compstmt);
10317 if (processing_template_decl)
10318 /* Do nothing now. */;
10319 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10320 finish_constructor_body ();
10321 else if (DECL_DESTRUCTOR_P (current_function_decl))
10322 finish_destructor_body ();
10325 /* Finish up a function declaration and compile that function
10326 all the way to assembler language output. The free the storage
10327 for the function definition.
10329 FLAGS is a bitwise or of the following values:
10331 We just finished processing the body of an in-class inline
10332 function definition. (This processing will have taken place
10333 after the class definition is complete.) */
10336 finish_function (int flags)
10338 tree fndecl = current_function_decl;
10339 tree fntype, ctype = NULL_TREE;
10340 int inclass_inline = (flags & 2) != 0;
10343 /* When we get some parse errors, we can end up without a
10344 current_function_decl, so cope. */
10345 if (fndecl == NULL_TREE)
10346 return error_mark_node;
10348 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10349 && DECL_VIRTUAL_P (fndecl)
10350 && !processing_template_decl)
10352 tree fnclass = DECL_CONTEXT (fndecl);
10353 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10354 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10357 nested = function_depth > 1;
10358 fntype = TREE_TYPE (fndecl);
10360 /* TREE_READONLY (fndecl) = 1;
10361 This caused &foo to be of type ptr-to-const-function
10362 which then got a warning when stored in a ptr-to-function variable. */
10364 gcc_assert (building_stmt_tree ());
10366 /* For a cloned function, we've already got all the code we need;
10367 there's no need to add any extra bits. */
10368 if (!DECL_CLONED_FUNCTION_P (fndecl))
10370 if (DECL_MAIN_P (current_function_decl))
10372 /* Make it so that `main' always returns 0 by default. */
10374 finish_return_stmt (integer_one_node);
10376 finish_return_stmt (integer_zero_node);
10380 /* Finish dealing with exception specifiers. */
10381 if (flag_exceptions && !processing_template_decl
10382 && flag_enforce_eh_specs
10383 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10384 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10385 (TREE_TYPE (current_function_decl)),
10386 current_eh_spec_block);
10389 /* If we're saving up tree structure, tie off the function now. */
10390 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
10392 finish_fname_decls ();
10394 /* If this function can't throw any exceptions, remember that. */
10395 if (!processing_template_decl
10396 && !cp_function_chain->can_throw
10397 && !flag_non_call_exceptions)
10398 TREE_NOTHROW (fndecl) = 1;
10400 /* This must come after expand_function_end because cleanups might
10401 have declarations (from inline functions) that need to go into
10402 this function's blocks. */
10404 /* If the current binding level isn't the outermost binding level
10405 for this function, either there is a bug, or we have experienced
10406 syntax errors and the statement tree is malformed. */
10407 if (current_binding_level->kind != sk_function_parms)
10409 /* Make sure we have already experienced errors. */
10410 gcc_assert (errorcount);
10412 /* Throw away the broken statement tree and extra binding
10414 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
10416 while (current_binding_level->kind != sk_function_parms)
10418 if (current_binding_level->kind == sk_class)
10419 pop_nested_class ();
10421 poplevel (0, 0, 0);
10424 poplevel (1, 0, 1);
10426 /* Statements should always be full-expressions at the outermost set
10427 of curly braces for a function. */
10428 gcc_assert (stmts_are_full_exprs_p ());
10430 /* Set up the named return value optimization, if we can. Candidate
10431 variables are selected in check_return_value. */
10432 if (current_function_return_value)
10434 tree r = current_function_return_value;
10437 if (r != error_mark_node
10438 /* This is only worth doing for fns that return in memory--and
10439 simpler, since we don't have to worry about promoted modes. */
10440 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
10441 /* Only allow this for variables declared in the outer scope of
10442 the function so we know that their lifetime always ends with a
10443 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10444 we were to do this optimization in tree-ssa. */
10445 && (outer = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl)))
10446 /* Skip the artificial function body block. */
10447 && (outer = BLOCK_SUBBLOCKS (outer))
10448 && chain_member (r, BLOCK_VARS (outer)))
10449 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
10451 current_function_return_value = NULL_TREE;
10454 /* Remember that we were in class scope. */
10455 if (current_class_name)
10456 ctype = current_class_type;
10458 /* Must mark the RESULT_DECL as being in this function. */
10459 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
10461 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10462 to the FUNCTION_DECL node itself. */
10463 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
10465 /* Save away current state, if appropriate. */
10466 if (!processing_template_decl)
10467 save_function_data (fndecl);
10469 /* Complain if there's just no return statement. */
10470 if (warn_return_type
10471 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
10472 && !dependent_type_p (TREE_TYPE (fntype))
10473 && !current_function_returns_value && !current_function_returns_null
10474 /* Don't complain if we abort or throw. */
10475 && !current_function_returns_abnormally
10476 && !DECL_NAME (DECL_RESULT (fndecl))
10477 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10478 inline function, as we might never be compiled separately. */
10479 && (DECL_INLINE (fndecl) || processing_template_decl)
10480 /* Structor return values (if any) are set by the compiler. */
10481 && !DECL_CONSTRUCTOR_P (fndecl)
10482 && !DECL_DESTRUCTOR_P (fndecl))
10483 warning ("no return statement in function returning non-void");
10485 /* Store the end of the function, so that we get good line number
10486 info for the epilogue. */
10487 cfun->function_end_locus = input_location;
10489 /* Genericize before inlining. */
10490 if (!processing_template_decl)
10492 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
10493 cp_genericize (fndecl);
10494 /* Clear out the bits we don't need. */
10495 f->x_current_class_ptr = NULL;
10496 f->x_current_class_ref = NULL;
10497 f->x_eh_spec_block = NULL;
10498 f->x_in_charge_parm = NULL;
10499 f->x_vtt_parm = NULL;
10500 f->x_return_value = NULL;
10501 f->bindings = NULL;
10503 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10504 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
10506 /* Clear out the bits we don't need. */
10507 local_names = NULL;
10508 named_label_uses = NULL;
10510 /* We're leaving the context of this function, so zap cfun. It's still in
10511 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10513 current_function_decl = NULL;
10515 /* If this is an in-class inline definition, we may have to pop the
10516 bindings for the template parameters that we added in
10517 maybe_begin_member_template_processing when start_function was
10519 if (inclass_inline)
10520 maybe_end_member_template_processing ();
10522 /* Leave the scope of the class. */
10524 pop_nested_class ();
10530 /* Let the error reporting routines know that we're outside a
10531 function. For a nested function, this value is used in
10532 cxx_pop_function_context and then reset via pop_function_context. */
10533 current_function_decl = NULL_TREE;
10538 /* Create the FUNCTION_DECL for a function definition.
10539 DECLSPECS and DECLARATOR are the parts of the declaration;
10540 they describe the return type and the name of the function,
10541 but twisted together in a fashion that parallels the syntax of C.
10543 This function creates a binding context for the function body
10544 as well as setting up the FUNCTION_DECL in current_function_decl.
10546 Returns a FUNCTION_DECL on success.
10548 If the DECLARATOR is not suitable for a function (it defines a datum
10549 instead), we return 0, which tells yyparse to report a parse error.
10551 May return void_type_node indicating that this method is actually
10552 a friend. See grokfield for more details.
10554 Came here with a `.pushlevel' .
10556 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10557 CHANGES TO CODE IN `grokfield'. */
10560 start_method (cp_decl_specifier_seq *declspecs,
10561 const cp_declarator *declarator, tree attrlist)
10563 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
10566 if (fndecl == error_mark_node)
10567 return error_mark_node;
10569 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
10571 error ("invalid member function declaration");
10572 return error_mark_node;
10576 cplus_decl_attributes (&fndecl, attrlist, 0);
10578 /* Pass friends other than inline friend functions back. */
10579 if (fndecl == void_type_node)
10582 if (DECL_IN_AGGR_P (fndecl))
10584 if (DECL_CONTEXT (fndecl)
10585 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
10586 error ("`%D' is already defined in class `%T'", fndecl,
10587 DECL_CONTEXT (fndecl));
10588 return void_type_node;
10591 check_template_shadow (fndecl);
10593 DECL_DECLARED_INLINE_P (fndecl) = 1;
10594 if (flag_default_inline)
10595 DECL_INLINE (fndecl) = 1;
10597 /* We process method specializations in finish_struct_1. */
10598 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
10600 fndecl = push_template_decl (fndecl);
10601 if (fndecl == error_mark_node)
10605 if (! DECL_FRIEND_P (fndecl))
10607 if (TREE_CHAIN (fndecl))
10609 fndecl = copy_node (fndecl);
10610 TREE_CHAIN (fndecl) = NULL_TREE;
10612 grok_special_member_properties (fndecl);
10615 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
10617 /* Make a place for the parms. */
10618 begin_scope (sk_function_parms, fndecl);
10620 DECL_IN_AGGR_P (fndecl) = 1;
10624 /* Go through the motions of finishing a function definition.
10625 We don't compile this method until after the whole class has
10628 FINISH_METHOD must return something that looks as though it
10629 came from GROKFIELD (since we are defining a method, after all).
10631 This is called after parsing the body of the function definition.
10632 STMTS is the chain of statements that makes up the function body.
10634 DECL is the ..._DECL that `start_method' provided. */
10637 finish_method (tree decl)
10639 tree fndecl = decl;
10644 if (decl == void_type_node)
10647 old_initial = DECL_INITIAL (fndecl);
10649 /* Undo the level for the parms (from start_method).
10650 This is like poplevel, but it causes nothing to be
10651 saved. Saving information here confuses symbol-table
10652 output routines. Besides, this information will
10653 be correctly output when this method is actually
10656 /* Clear out the meanings of the local variables of this level;
10657 also record in each decl which block it belongs to. */
10659 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
10661 if (DECL_NAME (link) != NULL_TREE)
10662 pop_binding (DECL_NAME (link), link);
10663 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
10664 DECL_CONTEXT (link) = NULL_TREE;
10667 poplevel (0, 0, 0);
10669 DECL_INITIAL (fndecl) = old_initial;
10671 /* We used to check if the context of FNDECL was different from
10672 current_class_type as another way to get inside here. This didn't work
10673 for String.cc in libg++. */
10674 if (DECL_FRIEND_P (fndecl))
10676 CLASSTYPE_INLINE_FRIENDS (current_class_type)
10677 = tree_cons (NULL_TREE, fndecl, CLASSTYPE_INLINE_FRIENDS (current_class_type));
10678 decl = void_type_node;
10685 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10686 we can lay it out later, when and if its type becomes complete. */
10689 maybe_register_incomplete_var (tree var)
10691 gcc_assert (TREE_CODE (var) == VAR_DECL);
10693 /* Keep track of variables with incomplete types. */
10694 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
10695 && DECL_EXTERNAL (var))
10697 tree inner_type = TREE_TYPE (var);
10699 while (TREE_CODE (inner_type) == ARRAY_TYPE)
10700 inner_type = TREE_TYPE (inner_type);
10701 inner_type = TYPE_MAIN_VARIANT (inner_type);
10703 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
10704 /* RTTI TD entries are created while defining the type_info. */
10705 || (TYPE_LANG_SPECIFIC (inner_type)
10706 && TYPE_BEING_DEFINED (inner_type)))
10707 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
10711 /* Called when a class type (given by TYPE) is defined. If there are
10712 any existing VAR_DECLs whose type hsa been completed by this
10713 declaration, update them now. */
10716 complete_vars (tree type)
10718 tree *list = &incomplete_vars;
10720 gcc_assert (CLASS_TYPE_P (type));
10723 if (same_type_p (type, TREE_PURPOSE (*list)))
10725 tree var = TREE_VALUE (*list);
10726 /* Complete the type of the variable. The VAR_DECL itself
10727 will be laid out in expand_expr. */
10728 complete_type (TREE_TYPE (var));
10729 /* Remove this entry from the list. */
10730 *list = TREE_CHAIN (*list);
10733 list = &TREE_CHAIN (*list);
10736 /* Check for pending declarations which may have abstract type. */
10737 complete_type_check_abstract (type);
10740 /* If DECL is of a type which needs a cleanup, build that cleanup
10744 cxx_maybe_build_cleanup (tree decl)
10746 tree type = TREE_TYPE (decl);
10748 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
10750 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
10753 if (TREE_CODE (type) == ARRAY_TYPE)
10757 cxx_mark_addressable (decl);
10758 rval = build_unary_op (ADDR_EXPR, decl, 0);
10761 /* Optimize for space over speed here. */
10762 if (! TYPE_USES_VIRTUAL_BASECLASSES (type)
10763 || flag_expensive_optimizations)
10764 flags |= LOOKUP_NONVIRTUAL;
10766 rval = build_delete (TREE_TYPE (rval), rval,
10767 sfk_complete_destructor, flags, 0);
10769 if (TYPE_USES_VIRTUAL_BASECLASSES (type)
10770 && ! TYPE_HAS_DESTRUCTOR (type))
10771 rval = build_compound_expr (rval, build_vbase_delete (type, decl));
10778 /* When a stmt has been parsed, this function is called. */
10785 /* DECL was originally constructed as a non-static member function,
10786 but turned out to be static. Update it accordingly. */
10789 revert_static_member_fn (tree decl)
10792 tree function = TREE_TYPE (decl);
10793 tree args = TYPE_ARG_TYPES (function);
10795 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
10796 != TYPE_UNQUALIFIED)
10797 error ("static member function `%#D' declared with type qualifiers",
10800 args = TREE_CHAIN (args);
10801 tmp = build_function_type (TREE_TYPE (function), args);
10802 tmp = build_qualified_type (tmp, cp_type_quals (function));
10803 tmp = build_exception_variant (tmp,
10804 TYPE_RAISES_EXCEPTIONS (function));
10805 TREE_TYPE (decl) = tmp;
10806 if (DECL_ARGUMENTS (decl))
10807 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
10808 DECL_STATIC_FUNCTION_P (decl) = 1;
10811 /* Initialize the variables used during compilation of a C++
10815 cxx_push_function_context (struct function * f)
10817 struct language_function *p = GGC_CNEW (struct language_function);
10820 /* Whenever we start a new function, we destroy temporaries in the
10822 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
10828 if (DECL_SAVED_FUNCTION_DATA (fn))
10830 /* If we already parsed this function, and we're just expanding it
10831 now, restore saved state. */
10832 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
10834 /* We don't need the saved data anymore. Unless this is an inline
10835 function; we need the named return value info for
10836 declare_return_variable. */
10837 if (! DECL_INLINE (fn))
10838 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
10843 /* Free the language-specific parts of F, now that we've finished
10844 compiling the function. */
10847 cxx_pop_function_context (struct function * f)
10852 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
10853 one of the language-independent trees. */
10855 enum cp_tree_node_structure_enum
10856 cp_tree_node_structure (union lang_tree_node * t)
10858 switch (TREE_CODE (&t->generic))
10860 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
10861 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
10862 case OVERLOAD: return TS_CP_OVERLOAD;
10863 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
10864 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
10865 case PTRMEM_CST: return TS_CP_PTRMEM;
10866 case BASELINK: return TS_CP_BASELINK;
10867 default: return TS_CP_GENERIC;
10871 /* Build the void_list_node (void_type_node having been created). */
10873 build_void_list_node (void)
10875 tree t = build_tree_list (NULL_TREE, void_type_node);
10880 cp_missing_noreturn_ok_p (tree decl)
10882 /* A missing noreturn is ok for the `main' function. */
10883 return DECL_MAIN_P (decl);
10886 /* Return the COMDAT group into which DECL should be placed. */
10889 cxx_comdat_group (tree decl)
10893 /* Virtual tables, construction virtual tables, and virtual table
10894 tables all go in a single COMDAT group, named after the primary
10896 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
10897 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
10898 /* For all other DECLs, the COMDAT group is the mangled name of the
10899 declaration itself. */
10901 name = DECL_ASSEMBLER_NAME (decl);
10903 return IDENTIFIER_POINTER (name);
10906 #include "gt-cp-decl.h"