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,
68 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
70 static void record_unknown_type (tree, const char *);
71 static tree builtin_function_1 (const char *, tree, tree,
72 enum built_in_function code,
73 enum built_in_class cl, const char *,
75 static tree build_library_fn_1 (tree, enum tree_code, tree);
76 static int member_function_or_else (tree, tree, enum overload_flags);
77 static void bad_specifiers (tree, const char *, int, int, int, int,
79 static void check_for_uninitialized_const_var (tree);
80 static hashval_t typename_hash (const void *);
81 static int typename_compare (const void *, const void *);
82 static tree local_variable_p_walkfn (tree *, int *, void *);
83 static tree record_builtin_java_type (const char *, int);
84 static const char *tag_name (enum tag_types code);
85 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
86 static int walk_globals_r (tree, void*);
87 static int walk_vtables_r (tree, void*);
88 static tree make_label_decl (tree, int);
89 static void use_label (tree);
90 static void check_previous_goto_1 (tree, struct cp_binding_level *, tree,
92 static void check_previous_goto (struct named_label_use_list *);
93 static void check_switch_goto (struct cp_binding_level *);
94 static void check_previous_gotos (tree);
95 static void pop_label (tree, tree);
96 static void pop_labels (tree);
97 static void maybe_deduce_size_from_array_init (tree, tree);
98 static void layout_var_decl (tree);
99 static void maybe_commonize_var (tree);
100 static tree check_initializer (tree, tree, int, tree *);
101 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
102 static void save_function_data (tree);
103 static void check_function_type (tree, tree);
104 static void finish_constructor_body (void);
105 static void begin_destructor_body (void);
106 static void finish_destructor_body (void);
107 static tree create_array_type_for_decl (tree, tree, tree);
108 static tree get_atexit_node (void);
109 static tree get_dso_handle_node (void);
110 static tree start_cleanup_fn (void);
111 static void end_cleanup_fn (void);
112 static tree cp_make_fname_decl (tree, int);
113 static void initialize_predefined_identifiers (void);
114 static tree check_special_function_return_type
115 (special_function_kind, tree, tree);
116 static tree push_cp_library_fn (enum tree_code, tree);
117 static tree build_cp_library_fn (tree, enum tree_code, tree);
118 static void store_parm_decls (tree);
119 static void initialize_local_var (tree, tree);
120 static void expand_static_init (tree, tree);
121 static tree next_initializable_field (tree);
122 static tree reshape_init (tree, tree *);
123 static tree build_typename_type (tree, tree, tree);
125 /* Erroneous argument lists can use this *IFF* they do not modify it. */
126 tree error_mark_list;
128 /* The following symbols are subsumed in the cp_global_trees array, and
129 listed here individually for documentation purposes.
132 tree wchar_decl_node;
134 tree vtable_entry_type;
135 tree delta_type_node;
136 tree __t_desc_type_node;
137 tree ti_desc_type_node;
138 tree bltn_desc_type_node, ptr_desc_type_node;
139 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
140 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
141 tree ptm_desc_type_node;
142 tree base_desc_type_node;
144 tree class_type_node;
145 tree unknown_type_node;
147 Array type `vtable_entry_type[]'
150 tree vtbl_ptr_type_node;
157 A FUNCTION_DECL which can call `abort'. Not necessarily the
158 one that the user will declare, but sufficient to be called
159 by routines that want to abort the program.
163 The FUNCTION_DECL for the default `::operator delete'.
165 tree global_delete_fndecl;
168 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
173 tree cp_global_trees[CPTI_MAX];
175 /* Indicates that there is a type value in some namespace, although
176 that is not necessarily in scope at the moment. */
178 tree global_type_node;
180 /* The node that holds the "name" of the global scope. */
181 tree global_scope_name;
183 /* Used only for jumps to as-yet undefined labels, since jumps to
184 defined labels can have their validity checked immediately. */
186 struct named_label_use_list GTY(())
188 struct cp_binding_level *binding_level;
191 location_t o_goto_locus;
192 struct named_label_use_list *next;
195 #define named_label_uses cp_function_chain->x_named_label_uses
197 #define local_names cp_function_chain->x_local_names
199 /* A list of objects which have constructors or destructors
200 which reside in the global scope. The decl is stored in
201 the TREE_VALUE slot and the initializer is stored
202 in the TREE_PURPOSE slot. */
203 tree static_aggregates;
207 /* A node for the integer constants 2, and 3. */
209 tree integer_two_node, integer_three_node;
211 /* A list of all LABEL_DECLs in the function that have names. Here so
212 we can clear out their names' definitions at the end of the
213 function, and so we can check the validity of jumps to these labels. */
215 struct named_label_list GTY(())
217 struct cp_binding_level *binding_level;
222 struct named_label_list *next;
223 unsigned int in_try_scope : 1;
224 unsigned int in_catch_scope : 1;
227 #define named_labels cp_function_chain->x_named_labels
229 /* The number of function bodies which we are currently processing.
230 (Zero if we are at namespace scope, one inside the body of a
231 function, two inside the body of a function in a local class, etc.) */
234 /* States indicating how grokdeclarator() should handle declspecs marked
235 with __attribute__((deprecated)). An object declared as
236 __attribute__((deprecated)) suppresses warnings of uses of other
239 enum deprecated_states {
244 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
246 /* True if a declaration with an `extern' linkage specifier is being
248 bool have_extern_spec;
251 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
252 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
253 time the VAR_DECL was declared, the type was incomplete. */
255 static GTY(()) tree incomplete_vars;
257 /* Returns the kind of template specialization we are currently
258 processing, given that it's declaration contained N_CLASS_SCOPES
259 explicit scope qualifications. */
262 current_tmpl_spec_kind (int n_class_scopes)
264 int n_template_parm_scopes = 0;
265 int seen_specialization_p = 0;
266 int innermost_specialization_p = 0;
267 struct cp_binding_level *b;
269 /* Scan through the template parameter scopes. */
270 for (b = current_binding_level;
271 b->kind == sk_template_parms;
274 /* If we see a specialization scope inside a parameter scope,
275 then something is wrong. That corresponds to a declaration
278 template <class T> template <> ...
280 which is always invalid since [temp.expl.spec] forbids the
281 specialization of a class member template if the enclosing
282 class templates are not explicitly specialized as well. */
283 if (b->explicit_spec_p)
285 if (n_template_parm_scopes == 0)
286 innermost_specialization_p = 1;
288 seen_specialization_p = 1;
290 else if (seen_specialization_p == 1)
291 return tsk_invalid_member_spec;
293 ++n_template_parm_scopes;
296 /* Handle explicit instantiations. */
297 if (processing_explicit_instantiation)
299 if (n_template_parm_scopes != 0)
300 /* We've seen a template parameter list during an explicit
301 instantiation. For example:
303 template <class T> template void f(int);
305 This is erroneous. */
306 return tsk_invalid_expl_inst;
308 return tsk_expl_inst;
311 if (n_template_parm_scopes < n_class_scopes)
312 /* We've not seen enough template headers to match all the
313 specialized classes present. For example:
315 template <class T> void R<T>::S<T>::f(int);
317 This is invalid; there needs to be one set of template
318 parameters for each class. */
319 return tsk_insufficient_parms;
320 else if (n_template_parm_scopes == n_class_scopes)
321 /* We're processing a non-template declaration (even though it may
322 be a member of a template class.) For example:
324 template <class T> void S<T>::f(int);
326 The `class T' maches the `S<T>', leaving no template headers
327 corresponding to the `f'. */
329 else if (n_template_parm_scopes > n_class_scopes + 1)
330 /* We've got too many template headers. For example:
332 template <> template <class T> void f (T);
334 There need to be more enclosing classes. */
335 return tsk_excessive_parms;
337 /* This must be a template. It's of the form:
339 template <class T> template <class U> void S<T>::f(U);
341 This is a specialization if the innermost level was a
342 specialization; otherwise it's just a definition of the
344 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
347 /* Exit the current scope. */
355 /* When a label goes out of scope, check to see if that label was used
356 in a valid manner, and issue any appropriate warnings or errors. */
359 pop_label (tree label, tree old_value)
361 if (!processing_template_decl)
363 if (DECL_INITIAL (label) == NULL_TREE)
367 cp_error_at ("label `%D' used but not defined", label);
368 #ifdef USE_MAPPED_LOCATION
369 location = input_location; /* FIXME want (input_filename, (line)0) */
371 location.file = input_filename;
374 /* Avoid crashing later. */
375 define_label (location, DECL_NAME (label));
377 else if (warn_unused_label && !TREE_USED (label))
378 cp_warning_at ("label `%D' defined but not used", label);
381 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
384 /* At the end of a function, all labels declared within the function
385 go out of scope. BLOCK is the top-level block for the
389 pop_labels (tree block)
391 struct named_label_list *link;
393 /* Clear out the definitions of all label names, since their scopes
395 for (link = named_labels; link; link = link->next)
397 pop_label (link->label_decl, link->old_value);
398 /* Put the labels into the "variables" of the top-level block,
399 so debugger can see them. */
400 TREE_CHAIN (link->label_decl) = BLOCK_VARS (block);
401 BLOCK_VARS (block) = link->label_decl;
407 /* The following two routines are used to interface to Objective-C++.
408 The binding level is purposely treated as an opaque type. */
411 objc_get_current_scope (void)
413 return current_binding_level;
416 /* The following routine is used by the NeXT-style SJLJ exceptions;
417 variables get marked 'volatile' so as to not be clobbered by
418 _setjmp()/_longjmp() calls. All variables in the current scope,
419 as well as parent scopes up to (but not including) ENCLOSING_BLK
420 shall be thusly marked. */
423 objc_mark_locals_volatile (void *enclosing_blk)
425 struct cp_binding_level *scope;
427 for (scope = current_binding_level;
428 scope && scope != enclosing_blk && scope->kind == sk_block;
429 scope = scope->level_chain)
433 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
435 if (TREE_CODE (decl) == VAR_DECL)
437 DECL_REGISTER (decl) = 0;
438 TREE_THIS_VOLATILE (decl) = 1;
444 /* Exit a binding level.
445 Pop the level off, and restore the state of the identifier-decl mappings
446 that were in effect when this level was entered.
448 If KEEP == 1, this level had explicit declarations, so
449 and create a "block" (a BLOCK node) for the level
450 to record its declarations and subblocks for symbol table output.
452 If FUNCTIONBODY is nonzero, this level is the body of a function,
453 so create a block as if KEEP were set and also clear out all
456 If REVERSE is nonzero, reverse the order of decls before putting
457 them into the BLOCK. */
460 poplevel (int keep, int reverse, int functionbody)
463 /* The chain of decls was accumulated in reverse order.
464 Put it into forward order, just for cleanliness. */
466 int tmp = functionbody;
467 int real_functionbody;
471 int leaving_for_scope;
474 timevar_push (TV_NAME_LOOKUP);
479 gcc_assert (current_binding_level->kind != sk_class);
481 real_functionbody = (current_binding_level->kind == sk_cleanup
482 ? ((functionbody = 0), tmp) : functionbody);
483 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
485 gcc_assert (!VEC_length(cp_class_binding,
486 current_binding_level->class_shadowed));
488 /* We used to use KEEP == 2 to indicate that the new block should go
489 at the beginning of the list of blocks at this binding level,
490 rather than the end. This hack is no longer used. */
491 gcc_assert (keep == 0 || keep == 1);
493 if (current_binding_level->keep)
496 /* Any uses of undefined labels, and any defined labels, now operate
497 under constraints of next binding contour. */
498 if (cfun && !functionbody)
500 struct cp_binding_level *level_chain;
501 level_chain = current_binding_level->level_chain;
504 struct named_label_use_list *uses;
505 struct named_label_list *labels;
506 for (labels = named_labels; labels; labels = labels->next)
507 if (labels->binding_level == current_binding_level)
510 if (current_binding_level->kind == sk_try)
511 labels->in_try_scope = 1;
512 if (current_binding_level->kind == sk_catch)
513 labels->in_catch_scope = 1;
514 for (decl = labels->names_in_scope; decl;
515 decl = TREE_CHAIN (decl))
516 if (decl_jump_unsafe (decl))
517 labels->bad_decls = tree_cons (NULL_TREE, decl,
519 labels->binding_level = level_chain;
520 labels->names_in_scope = level_chain->names;
523 for (uses = named_label_uses; uses; uses = uses->next)
524 if (uses->binding_level == current_binding_level)
526 uses->binding_level = level_chain;
527 uses->names_in_scope = level_chain->names;
532 /* Get the decls in the order they were written.
533 Usually current_binding_level->names is in reverse order.
534 But parameter decls were previously put in forward order. */
537 current_binding_level->names
538 = decls = nreverse (current_binding_level->names);
540 decls = current_binding_level->names;
542 /* If there were any declarations or structure tags in that level,
543 or if this level is a function body,
544 create a BLOCK to record them for the life of this function. */
546 if (keep == 1 || functionbody)
547 block = make_node (BLOCK);
548 if (block != NULL_TREE)
550 BLOCK_VARS (block) = decls;
551 BLOCK_SUBBLOCKS (block) = subblocks;
554 /* In each subblock, record that this is its superior. */
556 for (link = subblocks; link; link = TREE_CHAIN (link))
557 BLOCK_SUPERCONTEXT (link) = block;
559 /* We still support the old for-scope rules, whereby the variables
560 in a for-init statement were in scope after the for-statement
561 ended. We only use the new rules if flag_new_for_scope is
564 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
566 /* Before we remove the declarations first check for unused variables. */
567 if (warn_unused_variable
568 && !processing_template_decl)
569 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
570 if (TREE_CODE (decl) == VAR_DECL
571 && ! TREE_USED (decl)
572 && ! DECL_IN_SYSTEM_HEADER (decl)
573 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
574 warning ("%Junused variable '%D'", decl, decl);
576 /* Remove declarations for all the DECLs in this level. */
577 for (link = decls; link; link = TREE_CHAIN (link))
579 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
582 tree name = DECL_NAME (link);
586 ob = outer_binding (name,
587 IDENTIFIER_BINDING (name),
590 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
592 ns_binding = NULL_TREE;
594 if (ob && ob->scope == current_binding_level->level_chain)
595 /* We have something like:
600 and we are leaving the `for' scope. There's no reason to
601 keep the binding of the inner `i' in this case. */
602 pop_binding (name, link);
603 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
604 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
605 /* Here, we have something like:
613 We must pop the for-scope binding so we know what's a
614 type and what isn't. */
615 pop_binding (name, link);
618 /* Mark this VAR_DECL as dead so that we can tell we left it
619 there only for backward compatibility. */
620 DECL_DEAD_FOR_LOCAL (link) = 1;
622 /* Keep track of what should have happened when we
623 popped the binding. */
625 DECL_SHADOWED_FOR_VAR (link) = ob->value;
627 /* Add it to the list of dead variables in the next
628 outermost binding to that we can remove these when we
629 leave that binding. */
630 current_binding_level->level_chain->dead_vars_from_for
631 = tree_cons (NULL_TREE, link,
632 current_binding_level->level_chain->
635 /* Although we don't pop the cxx_binding, we do clear
636 its SCOPE since the scope is going away now. */
637 IDENTIFIER_BINDING (name)->scope
638 = current_binding_level->level_chain;
645 /* Remove the binding. */
648 if (TREE_CODE (decl) == TREE_LIST)
649 decl = TREE_VALUE (decl);
652 if (TREE_CODE (name) == OVERLOAD)
653 name = OVL_FUNCTION (name);
655 gcc_assert (DECL_P (name));
656 pop_binding (DECL_NAME (name), decl);
660 /* Remove declarations for any `for' variables from inner scopes
661 that we kept around. */
662 for (link = current_binding_level->dead_vars_from_for;
663 link; link = TREE_CHAIN (link))
664 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
666 /* Restore the IDENTIFIER_TYPE_VALUEs. */
667 for (link = current_binding_level->type_shadowed;
668 link; link = TREE_CHAIN (link))
669 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
671 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
672 for (link = current_binding_level->shadowed_labels;
674 link = TREE_CHAIN (link))
675 pop_label (TREE_VALUE (link), TREE_PURPOSE (link));
677 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
678 list if a `using' declaration put them there. The debugging
679 back-ends won't understand OVERLOAD, so we remove them here.
680 Because the BLOCK_VARS are (temporarily) shared with
681 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
682 popped all the bindings. */
687 for (d = &BLOCK_VARS (block); *d; )
689 if (TREE_CODE (*d) == TREE_LIST)
690 *d = TREE_CHAIN (*d);
692 d = &TREE_CHAIN (*d);
696 /* If the level being exited is the top level of a function,
697 check over all the labels. */
700 /* Since this is the top level block of a function, the vars are
701 the function's parameters. Don't leave them in the BLOCK
702 because they are found in the FUNCTION_DECL instead. */
703 BLOCK_VARS (block) = 0;
707 kind = current_binding_level->kind;
708 if (kind == sk_cleanup)
712 /* If this is a temporary binding created for a cleanup, then we'll
713 have pushed a statement list level. Pop that, create a new
714 BIND_EXPR for the block, and insert it into the stream. */
715 stmt = pop_stmt_list (current_binding_level->statement_list);
716 stmt = c_build_bind_expr (block, stmt);
722 DECL_INITIAL (current_function_decl) = block;
724 current_binding_level->blocks
725 = chainon (current_binding_level->blocks, block);
727 /* If we did not make a block for the level just exited,
728 any blocks made for inner levels
729 (since they cannot be recorded as subblocks in that level)
730 must be carried forward so they will later become subblocks
731 of something else. */
733 current_binding_level->blocks
734 = chainon (current_binding_level->blocks, subblocks);
736 /* Each and every BLOCK node created here in `poplevel' is important
737 (e.g. for proper debugging information) so if we created one
738 earlier, mark it as "used". */
740 TREE_USED (block) = 1;
742 /* All temporary bindings created for cleanups are popped silently. */
743 if (kind == sk_cleanup)
746 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
749 /* Delete the node BLOCK from the current binding level.
750 This is used for the block inside a stmt expr ({...})
751 so that the block can be reinserted where appropriate. */
754 delete_block (tree block)
757 if (current_binding_level->blocks == block)
758 current_binding_level->blocks = TREE_CHAIN (block);
759 for (t = current_binding_level->blocks; t;)
761 if (TREE_CHAIN (t) == block)
762 TREE_CHAIN (t) = TREE_CHAIN (block);
766 TREE_CHAIN (block) = NULL_TREE;
767 /* Clear TREE_USED which is always set by poplevel.
768 The flag is set again if insert_block is called. */
769 TREE_USED (block) = 0;
772 /* Insert BLOCK at the end of the list of subblocks of the
773 current binding level. This is used when a BIND_EXPR is expanded,
774 to handle the BLOCK node inside the BIND_EXPR. */
777 insert_block (tree block)
779 TREE_USED (block) = 1;
780 current_binding_level->blocks
781 = chainon (current_binding_level->blocks, block);
784 /* Returns nonzero if T is a virtual function table. */
787 vtable_decl_p (tree t, void* data ATTRIBUTE_UNUSED )
789 return (TREE_CODE (t) == VAR_DECL && DECL_VIRTUAL_P (t));
792 /* Returns nonzero if T is a TYPE_DECL for a type with virtual
796 vtype_decl_p (tree t, void *data ATTRIBUTE_UNUSED )
798 return (TREE_CODE (t) == TYPE_DECL
799 && TREE_CODE (TREE_TYPE (t)) == RECORD_TYPE
800 && TYPE_POLYMORPHIC_P (TREE_TYPE (t)));
803 struct walk_globals_data {
809 /* Walk the vtable declarations in NAMESPACE. Whenever one is found
810 for which P returns nonzero, call F with its address. If any call
811 to F returns a nonzero value, return a nonzero value. */
814 walk_vtables_r (tree namespace, void* data)
816 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
817 walk_globals_fn f = wgd->f;
819 tree decl = NAMESPACE_LEVEL (namespace)->vtables;
822 for (; decl ; decl = TREE_CHAIN (decl))
823 result |= (*f) (&decl, d);
828 /* Walk the vtable declarations. Whenever one is found for which P
829 returns nonzero, call F with its address. If any call to F
830 returns a nonzero value, return a nonzero value. */
832 walk_vtables (walk_globals_pred p, walk_globals_fn f, void *data)
834 struct walk_globals_data wgd;
839 return walk_namespaces (walk_vtables_r, &wgd);
842 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
843 itself, calling F for each. The DATA is passed to F as well. */
846 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
849 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
851 result |= (*f) (namespace, data);
853 for (; current; current = TREE_CHAIN (current))
854 result |= walk_namespaces_r (current, f, data);
859 /* Walk all the namespaces, calling F for each. The DATA is passed to
863 walk_namespaces (walk_namespaces_fn f, void* data)
865 return walk_namespaces_r (global_namespace, f, data);
868 /* Walk the global declarations in NAMESPACE. Whenever one is found
869 for which P returns nonzero, call F with its address. If any call
870 to F returns a nonzero value, return a nonzero value. */
873 walk_globals_r (tree namespace, void* data)
875 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
876 walk_globals_pred p = wgd->p;
877 walk_globals_fn f = wgd->f;
882 t = &NAMESPACE_LEVEL (namespace)->names;
889 result |= (*f) (t, d);
891 /* If F changed *T, then *T still points at the next item to
894 t = &TREE_CHAIN (*t);
900 /* Walk the global declarations. Whenever one is found for which P
901 returns true, call F with its address. If any call to F
902 returns true, return true. */
905 walk_globals (walk_globals_pred p, walk_globals_fn f, void *data)
907 struct walk_globals_data wgd;
912 return walk_namespaces (walk_globals_r, &wgd);
915 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
916 DATA is non-NULL, this is the last time we will call
917 wrapup_global_declarations for this NAMESPACE. */
920 wrapup_globals_for_namespace (tree namespace, void* data)
922 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
923 varray_type statics = level->static_decls;
924 tree *vec = &VARRAY_TREE (statics, 0);
925 int len = VARRAY_ACTIVE_SIZE (statics);
926 int last_time = (data != 0);
930 check_global_declarations (vec, len);
934 /* Write out any globals that need to be output. */
935 return wrapup_global_declarations (vec, len);
939 /* In C++, you don't have to write `struct S' to refer to `S'; you
940 can just use `S'. We accomplish this by creating a TYPE_DECL as
941 if the user had written `typedef struct S S'. Create and return
942 the TYPE_DECL for TYPE. */
945 create_implicit_typedef (tree name, tree type)
949 decl = build_decl (TYPE_DECL, name, type);
950 DECL_ARTIFICIAL (decl) = 1;
951 /* There are other implicit type declarations, like the one *within*
952 a class that allows you to write `S::S'. We must distinguish
954 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
955 TYPE_NAME (type) = decl;
960 /* Remember a local name for name-mangling purposes. */
963 push_local_name (tree decl)
968 timevar_push (TV_NAME_LOOKUP);
970 VARRAY_TREE_INIT (local_names, 8, "local_names");
972 name = DECL_NAME (decl);
974 nelts = VARRAY_ACTIVE_SIZE (local_names);
975 for (i = 0; i < nelts; i++)
977 t = VARRAY_TREE (local_names, i);
978 if (DECL_NAME (t) == name)
980 if (!DECL_LANG_SPECIFIC (decl))
981 retrofit_lang_decl (decl);
982 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
983 if (DECL_LANG_SPECIFIC (t))
984 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
986 DECL_DISCRIMINATOR (decl) = 1;
988 VARRAY_TREE (local_names, i) = decl;
989 timevar_pop (TV_NAME_LOOKUP);
994 VARRAY_PUSH_TREE (local_names, decl);
995 timevar_pop (TV_NAME_LOOKUP);
998 /* Subroutine of duplicate_decls: return truthvalue of whether
999 or not types of these decls match.
1001 For C++, we must compare the parameter list so that `int' can match
1002 `int&' in a parameter position, but `int&' is not confused with
1006 decls_match (tree newdecl, tree olddecl)
1010 if (newdecl == olddecl)
1013 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
1014 /* If the two DECLs are not even the same kind of thing, we're not
1015 interested in their types. */
1018 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1020 tree f1 = TREE_TYPE (newdecl);
1021 tree f2 = TREE_TYPE (olddecl);
1022 tree p1 = TYPE_ARG_TYPES (f1);
1023 tree p2 = TYPE_ARG_TYPES (f2);
1025 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1026 && ! (DECL_EXTERN_C_P (newdecl)
1027 && DECL_EXTERN_C_P (olddecl)))
1030 if (TREE_CODE (f1) != TREE_CODE (f2))
1033 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
1035 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
1036 && (DECL_BUILT_IN (olddecl)
1037 #ifndef NO_IMPLICIT_EXTERN_C
1038 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
1039 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
1043 types_match = self_promoting_args_p (p1);
1044 if (p1 == void_list_node)
1045 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1047 #ifndef NO_IMPLICIT_EXTERN_C
1048 else if (p1 == NULL_TREE
1049 && (DECL_EXTERN_C_P (olddecl)
1050 && DECL_IN_SYSTEM_HEADER (olddecl)
1051 && !DECL_CLASS_SCOPE_P (olddecl))
1052 && (DECL_EXTERN_C_P (newdecl)
1053 && DECL_IN_SYSTEM_HEADER (newdecl)
1054 && !DECL_CLASS_SCOPE_P (newdecl)))
1056 types_match = self_promoting_args_p (p2);
1057 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1061 types_match = compparms (p1, p2);
1066 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1068 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1069 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1072 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1073 DECL_TEMPLATE_PARMS (olddecl)))
1076 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1077 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1078 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1080 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1081 DECL_TEMPLATE_RESULT (newdecl));
1085 if (TREE_TYPE (newdecl) == error_mark_node)
1086 types_match = TREE_TYPE (olddecl) == error_mark_node;
1087 else if (TREE_TYPE (olddecl) == NULL_TREE)
1088 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1089 else if (TREE_TYPE (newdecl) == NULL_TREE)
1092 types_match = comptypes (TREE_TYPE (newdecl),
1093 TREE_TYPE (olddecl),
1094 COMPARE_REDECLARATION);
1100 /* If NEWDECL is `static' and an `extern' was seen previously,
1101 warn about it. OLDDECL is the previous declaration.
1103 Note that this does not apply to the C++ case of declaring
1104 a variable `extern const' and then later `const'.
1106 Don't complain about built-in functions, since they are beyond
1107 the user's control. */
1110 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1114 if (TREE_CODE (newdecl) == TYPE_DECL
1115 || TREE_CODE (newdecl) == TEMPLATE_DECL
1116 || TREE_CODE (newdecl) == CONST_DECL
1117 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1120 /* Don't get confused by static member functions; that's a different
1122 if (TREE_CODE (newdecl) == FUNCTION_DECL
1123 && DECL_STATIC_FUNCTION_P (newdecl))
1126 /* If the old declaration was `static', or the new one isn't, then
1127 then everything is OK. */
1128 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1131 /* It's OK to declare a builtin function as `static'. */
1132 if (TREE_CODE (olddecl) == FUNCTION_DECL
1133 && DECL_ARTIFICIAL (olddecl))
1136 name = DECL_ASSEMBLER_NAME (newdecl);
1137 pedwarn ("`%D' was declared `extern' and later `static'", newdecl);
1138 cp_pedwarn_at ("previous declaration of `%D'", olddecl);
1141 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1142 If the redeclaration is invalid, a diagnostic is issued, and the
1143 error_mark_node is returned. Otherwise, OLDDECL is returned.
1145 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1149 duplicate_decls (tree newdecl, tree olddecl)
1151 unsigned olddecl_uid = DECL_UID (olddecl);
1152 int olddecl_friend = 0, types_match = 0;
1153 int new_defines_function = 0;
1155 if (newdecl == olddecl)
1158 types_match = decls_match (newdecl, olddecl);
1160 /* If either the type of the new decl or the type of the old decl is an
1161 error_mark_node, then that implies that we have already issued an
1162 error (earlier) for some bogus type specification, and in that case,
1163 it is rather pointless to harass the user with yet more error message
1164 about the same declaration, so just pretend the types match here. */
1165 if (TREE_TYPE (newdecl) == error_mark_node
1166 || TREE_TYPE (olddecl) == error_mark_node)
1169 if (DECL_P (olddecl)
1170 && TREE_CODE (newdecl) == FUNCTION_DECL
1171 && TREE_CODE (olddecl) == FUNCTION_DECL
1172 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1174 if (DECL_DECLARED_INLINE_P (newdecl)
1175 && DECL_UNINLINABLE (newdecl)
1176 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1177 /* Already warned elsewhere. */;
1178 else if (DECL_DECLARED_INLINE_P (olddecl)
1179 && DECL_UNINLINABLE (olddecl)
1180 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1181 /* Already warned. */;
1182 else if (DECL_DECLARED_INLINE_P (newdecl)
1183 && DECL_UNINLINABLE (olddecl)
1184 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1186 warning ("%Jfunction '%D' redeclared as inline", newdecl, newdecl);
1187 warning ("%Jprevious declaration of '%D' with attribute noinline",
1190 else if (DECL_DECLARED_INLINE_P (olddecl)
1191 && DECL_UNINLINABLE (newdecl)
1192 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1194 warning ("%Jfunction '%D' redeclared with attribute noinline",
1196 warning ("%Jprevious declaration of '%D' was inline",
1201 /* Check for redeclaration and other discrepancies. */
1202 if (TREE_CODE (olddecl) == FUNCTION_DECL
1203 && DECL_ARTIFICIAL (olddecl))
1205 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1207 /* Avoid warnings redeclaring anticipated built-ins. */
1208 if (DECL_ANTICIPATED (olddecl))
1211 /* If you declare a built-in or predefined function name as static,
1212 the old definition is overridden, but optionally warn this was a
1213 bad choice of name. */
1214 if (! TREE_PUBLIC (newdecl))
1217 warning ("shadowing %s function `%#D'",
1218 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1220 /* Discard the old built-in function. */
1223 /* If the built-in is not ansi, then programs can override
1224 it even globally without an error. */
1225 else if (! DECL_BUILT_IN (olddecl))
1226 warning ("library function `%#D' redeclared as non-function `%#D'",
1230 error ("declaration of `%#D'", newdecl);
1231 error ("conflicts with built-in declaration `%#D'",
1236 else if (!types_match)
1238 /* Avoid warnings redeclaring anticipated built-ins. */
1239 if (DECL_ANTICIPATED (olddecl))
1241 /* Deal with fileptr_type_node. FILE type is not known
1242 at the time we create the builtins. */
1245 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1246 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1248 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1251 else if (TREE_VALUE (t2) == fileptr_type_node)
1253 tree t = TREE_VALUE (t1);
1255 if (TREE_CODE (t) == POINTER_TYPE
1256 && TYPE_NAME (TREE_TYPE (t))
1257 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1258 == get_identifier ("FILE")
1259 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1261 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1263 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1264 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1265 types_match = decls_match (newdecl, olddecl);
1267 return duplicate_decls (newdecl, olddecl);
1268 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1271 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1274 else if ((DECL_EXTERN_C_P (newdecl)
1275 && DECL_EXTERN_C_P (olddecl))
1276 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1277 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1279 /* A near match; override the builtin. */
1281 if (TREE_PUBLIC (newdecl))
1283 warning ("new declaration `%#D'", newdecl);
1284 warning ("ambiguates built-in declaration `%#D'",
1287 else if (warn_shadow)
1288 warning ("shadowing %s function `%#D'",
1289 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1293 /* Discard the old built-in function. */
1296 /* Replace the old RTL to avoid problems with inlining. */
1297 COPY_DECL_RTL (newdecl, olddecl);
1299 /* Even if the types match, prefer the new declarations type
1300 for anticipated built-ins, for exception lists, etc... */
1301 else if (DECL_ANTICIPATED (olddecl))
1303 tree type = TREE_TYPE (newdecl);
1304 tree attribs = (*targetm.merge_type_attributes)
1305 (TREE_TYPE (olddecl), type);
1307 type = cp_build_type_attribute_variant (type, attribs);
1308 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1311 /* Whether or not the builtin can throw exceptions has no
1312 bearing on this declarator. */
1313 TREE_NOTHROW (olddecl) = 0;
1315 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1317 /* If a builtin function is redeclared as `static', merge
1318 the declarations, but make the original one static. */
1319 DECL_THIS_STATIC (olddecl) = 1;
1320 TREE_PUBLIC (olddecl) = 0;
1322 /* Make the old declaration consistent with the new one so
1323 that all remnants of the builtin-ness of this function
1324 will be banished. */
1325 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1326 COPY_DECL_RTL (newdecl, olddecl);
1329 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1331 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1332 && TREE_CODE (newdecl) != TYPE_DECL
1333 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1334 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1335 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1336 && TREE_CODE (olddecl) != TYPE_DECL
1337 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1338 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1341 /* We do nothing special here, because C++ does such nasty
1342 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1343 get shadowed, and know that if we need to find a TYPE_DECL
1344 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1345 slot of the identifier. */
1349 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1350 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1351 || (TREE_CODE (olddecl) == FUNCTION_DECL
1352 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1355 error ("`%#D' redeclared as different kind of symbol", newdecl);
1356 if (TREE_CODE (olddecl) == TREE_LIST)
1357 olddecl = TREE_VALUE (olddecl);
1358 cp_error_at ("previous declaration of `%#D'", olddecl);
1360 return error_mark_node;
1362 else if (!types_match)
1364 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1365 /* These are certainly not duplicate declarations; they're
1366 from different scopes. */
1369 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1371 /* The name of a class template may not be declared to refer to
1372 any other template, class, function, object, namespace, value,
1373 or type in the same scope. */
1374 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1375 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1377 error ("declaration of template `%#D'", newdecl);
1378 cp_error_at ("conflicts with previous declaration `%#D'",
1381 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1382 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1383 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1384 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1385 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1386 DECL_TEMPLATE_PARMS (olddecl))
1387 /* Template functions can be disambiguated by
1389 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1390 TREE_TYPE (TREE_TYPE (olddecl))))
1392 error ("new declaration `%#D'", newdecl);
1393 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
1397 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1399 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1401 error ("declaration of C function `%#D' conflicts with",
1403 cp_error_at ("previous declaration `%#D' here", olddecl);
1405 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1406 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1408 error ("new declaration `%#D'", newdecl);
1409 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
1416 error ("conflicting declaration '%#D'", newdecl);
1417 cp_error_at ("'%D' has a previous declaration as `%#D'",
1422 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1423 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1424 && (!DECL_TEMPLATE_INFO (newdecl)
1425 || (DECL_TI_TEMPLATE (newdecl)
1426 != DECL_TI_TEMPLATE (olddecl))))
1427 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1428 && (!DECL_TEMPLATE_INFO (olddecl)
1429 || (DECL_TI_TEMPLATE (olddecl)
1430 != DECL_TI_TEMPLATE (newdecl))))))
1431 /* It's OK to have a template specialization and a non-template
1432 with the same type, or to have specializations of two
1433 different templates with the same type. Note that if one is a
1434 specialization, and the other is an instantiation of the same
1435 template, that we do not exit at this point. That situation
1436 can occur if we instantiate a template class, and then
1437 specialize one of its methods. This situation is valid, but
1438 the declarations must be merged in the usual way. */
1440 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1441 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1442 && !DECL_USE_TEMPLATE (newdecl))
1443 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1444 && !DECL_USE_TEMPLATE (olddecl))))
1445 /* One of the declarations is a template instantiation, and the
1446 other is not a template at all. That's OK. */
1448 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1450 /* In [namespace.alias] we have:
1452 In a declarative region, a namespace-alias-definition can be
1453 used to redefine a namespace-alias declared in that declarative
1454 region to refer only to the namespace to which it already
1457 Therefore, if we encounter a second alias directive for the same
1458 alias, we can just ignore the second directive. */
1459 if (DECL_NAMESPACE_ALIAS (newdecl)
1460 && (DECL_NAMESPACE_ALIAS (newdecl)
1461 == DECL_NAMESPACE_ALIAS (olddecl)))
1463 /* [namespace.alias]
1465 A namespace-name or namespace-alias shall not be declared as
1466 the name of any other entity in the same declarative region.
1467 A namespace-name defined at global scope shall not be
1468 declared as the name of any other entity in any global scope
1470 error ("declaration of `namespace %D' conflicts with", newdecl);
1471 cp_error_at ("previous declaration of `namespace %D' here", olddecl);
1472 return error_mark_node;
1476 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1479 error (errmsg, newdecl);
1480 if (DECL_NAME (olddecl) != NULL_TREE)
1481 cp_error_at ((DECL_INITIAL (olddecl)
1482 && namespace_bindings_p ())
1483 ? "`%#D' previously defined here"
1484 : "`%#D' previously declared here", olddecl);
1485 return error_mark_node;
1487 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1488 && DECL_INITIAL (olddecl) != NULL_TREE
1489 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1490 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1492 /* Prototype decl follows defn w/o prototype. */
1493 cp_warning_at ("prototype for `%#D'", newdecl);
1494 warning ("%Jfollows non-prototype definition here", olddecl);
1496 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1497 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1499 /* extern "C" int foo ();
1500 int foo () { bar (); }
1502 if (current_lang_depth () == 0)
1503 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1506 cp_error_at ("previous declaration of `%#D' with %L linkage",
1507 olddecl, DECL_LANGUAGE (olddecl));
1508 error ("conflicts with new declaration with %L linkage",
1509 DECL_LANGUAGE (newdecl));
1513 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1515 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1517 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1518 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1521 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1522 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1524 for (; t1 && t1 != void_list_node;
1525 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1526 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1528 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1531 pedwarn ("default argument given for parameter %d of `%#D'",
1533 cp_pedwarn_at ("after previous specification in `%#D'",
1538 error ("default argument given for parameter %d of `%#D'",
1540 cp_error_at ("after previous specification in `%#D'",
1545 if (DECL_DECLARED_INLINE_P (newdecl)
1546 && ! DECL_DECLARED_INLINE_P (olddecl)
1547 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1549 warning ("`%#D' was used before it was declared inline", newdecl);
1550 warning ("%Jprevious non-inline declaration here", olddecl);
1555 /* Do not merge an implicit typedef with an explicit one. In:
1559 typedef class A A __attribute__ ((foo));
1561 the attribute should apply only to the typedef. */
1562 if (TREE_CODE (olddecl) == TYPE_DECL
1563 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1564 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1567 /* If new decl is `static' and an `extern' was seen previously,
1569 warn_extern_redeclared_static (newdecl, olddecl);
1571 /* We have committed to returning 1 at this point. */
1572 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1574 /* Now that functions must hold information normally held
1575 by field decls, there is extra work to do so that
1576 declaration information does not get destroyed during
1578 if (DECL_VINDEX (olddecl))
1579 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1580 if (DECL_CONTEXT (olddecl))
1581 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1582 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1583 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1584 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1585 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1586 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1587 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1588 SET_OVERLOADED_OPERATOR_CODE
1589 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1590 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1592 /* Optionally warn about more than one declaration for the same
1593 name, but don't warn about a function declaration followed by a
1595 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1596 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1597 /* Don't warn about extern decl followed by definition. */
1598 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1599 /* Don't warn about friends, let add_friend take care of it. */
1600 && ! (DECL_FRIEND_P (newdecl) || DECL_FRIEND_P (olddecl)))
1602 warning ("redundant redeclaration of `%D' in same scope", newdecl);
1603 cp_warning_at ("previous declaration of `%D'", olddecl);
1607 /* Deal with C++: must preserve virtual function table size. */
1608 if (TREE_CODE (olddecl) == TYPE_DECL)
1610 tree newtype = TREE_TYPE (newdecl);
1611 tree oldtype = TREE_TYPE (olddecl);
1613 if (newtype != error_mark_node && oldtype != error_mark_node
1614 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1615 CLASSTYPE_FRIEND_CLASSES (newtype)
1616 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1618 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1621 /* Copy all the DECL_... slots specified in the new decl
1622 except for any that we copy here from the old type. */
1623 DECL_ATTRIBUTES (newdecl)
1624 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1626 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1628 TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
1629 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1630 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1631 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1633 /* If the new declaration is a definition, update the file and
1634 line information on the declaration. */
1635 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)) == NULL_TREE
1636 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl)) != NULL_TREE)
1638 DECL_SOURCE_LOCATION (olddecl)
1639 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl))
1640 = DECL_SOURCE_LOCATION (newdecl);
1641 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1642 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl))
1643 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl));
1646 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1648 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl))
1649 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl));
1650 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl))
1651 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl));
1659 /* Automatically handles default parameters. */
1660 tree oldtype = TREE_TYPE (olddecl);
1663 /* Merge the data types specified in the two decls. */
1664 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1666 /* If merge_types produces a non-typedef type, just use the old type. */
1667 if (TREE_CODE (newdecl) == TYPE_DECL
1668 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1671 if (TREE_CODE (newdecl) == VAR_DECL)
1673 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1674 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1675 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1676 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1679 /* Do this after calling `merge_types' so that default
1680 parameters don't confuse us. */
1681 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1682 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
1683 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
1685 TREE_TYPE (newdecl) = build_exception_variant (newtype,
1686 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
1687 TREE_TYPE (olddecl) = build_exception_variant (newtype,
1688 TYPE_RAISES_EXCEPTIONS (oldtype));
1690 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
1691 && ! DECL_IS_BUILTIN (olddecl)
1693 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
1694 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
1696 error ("declaration of `%F' throws different exceptions",
1698 cp_error_at ("than previous declaration `%F'", olddecl);
1701 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1703 /* Lay the type out, unless already done. */
1704 if (! same_type_p (newtype, oldtype)
1705 && TREE_TYPE (newdecl) != error_mark_node
1706 && !(processing_template_decl && uses_template_parms (newdecl)))
1707 layout_type (TREE_TYPE (newdecl));
1709 if ((TREE_CODE (newdecl) == VAR_DECL
1710 || TREE_CODE (newdecl) == PARM_DECL
1711 || TREE_CODE (newdecl) == RESULT_DECL
1712 || TREE_CODE (newdecl) == FIELD_DECL
1713 || TREE_CODE (newdecl) == TYPE_DECL)
1714 && !(processing_template_decl && uses_template_parms (newdecl)))
1715 layout_decl (newdecl, 0);
1717 /* Merge the type qualifiers. */
1718 if (TREE_READONLY (newdecl))
1719 TREE_READONLY (olddecl) = 1;
1720 if (TREE_THIS_VOLATILE (newdecl))
1721 TREE_THIS_VOLATILE (olddecl) = 1;
1723 /* Merge the initialization information. */
1724 if (DECL_INITIAL (newdecl) == NULL_TREE
1725 && DECL_INITIAL (olddecl) != NULL_TREE)
1727 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1728 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1729 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1730 && DECL_LANG_SPECIFIC (newdecl)
1731 && DECL_LANG_SPECIFIC (olddecl))
1733 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1734 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1738 /* Merge the section attribute.
1739 We want to issue an error if the sections conflict but that must be
1740 done later in decl_attributes since we are called before attributes
1742 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1743 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1745 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1747 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1748 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1749 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1750 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1751 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1752 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1753 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1754 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1755 /* Keep the old RTL. */
1756 COPY_DECL_RTL (olddecl, newdecl);
1758 else if (TREE_CODE (newdecl) == VAR_DECL
1759 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1761 /* Keep the old RTL. We cannot keep the old RTL if the old
1762 declaration was for an incomplete object and the new
1763 declaration is not since many attributes of the RTL will
1765 COPY_DECL_RTL (olddecl, newdecl);
1768 /* If cannot merge, then use the new type and qualifiers,
1769 and don't preserve the old rtl. */
1772 /* Clean out any memory we had of the old declaration. */
1773 tree oldstatic = value_member (olddecl, static_aggregates);
1775 TREE_VALUE (oldstatic) = error_mark_node;
1777 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1778 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1779 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1780 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1783 /* Merge the storage class information. */
1784 merge_weak (newdecl, olddecl);
1786 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1787 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1788 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1789 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1790 if (! DECL_EXTERNAL (olddecl))
1791 DECL_EXTERNAL (newdecl) = 0;
1793 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1795 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1796 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1797 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1798 DECL_TEMPLATE_INSTANTIATED (newdecl)
1799 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1800 /* Don't really know how much of the language-specific
1801 values we should copy from old to new. */
1802 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1803 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1804 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1805 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1806 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1807 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1808 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1809 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1810 olddecl_friend = DECL_FRIEND_P (olddecl);
1812 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1813 if (TREE_CODE (newdecl) == FUNCTION_DECL
1814 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1816 DECL_BEFRIENDING_CLASSES (newdecl)
1817 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1818 DECL_BEFRIENDING_CLASSES (olddecl));
1819 /* DECL_THUNKS is only valid for virtual functions,
1820 otherwise it is a DECL_FRIEND_CONTEXT. */
1821 if (DECL_VIRTUAL_P (newdecl))
1822 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1826 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1828 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1829 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1831 /* If newdecl is not a specialization, then it is not a
1832 template-related function at all. And that means that we
1833 should have exited above, returning 0. */
1834 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1836 if (TREE_USED (olddecl))
1837 /* From [temp.expl.spec]:
1839 If a template, a member template or the member of a class
1840 template is explicitly specialized then that
1841 specialization shall be declared before the first use of
1842 that specialization that would cause an implicit
1843 instantiation to take place, in every translation unit in
1844 which such a use occurs. */
1845 error ("explicit specialization of %D after first use",
1848 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1850 /* [temp.expl.spec/14] We don't inline explicit specialization
1851 just because the primary template says so. */
1855 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1856 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1858 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1860 /* If either decl says `inline', this fn is inline, unless
1861 its definition was passed already. */
1862 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1863 DECL_INLINE (olddecl) = 1;
1864 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1866 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1867 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1870 /* Preserve abstractness on cloned [cd]tors. */
1871 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1875 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1876 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1877 COPY_DECL_RTL (newdecl, olddecl);
1879 if (! types_match || new_defines_function)
1881 /* These need to be copied so that the names are available.
1882 Note that if the types do match, we'll preserve inline
1883 info and other bits, but if not, we won't. */
1884 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1885 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1887 if (new_defines_function)
1888 /* If defining a function declared with other language
1889 linkage, use the previously declared language linkage. */
1890 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1891 else if (types_match)
1893 /* If redeclaring a builtin function, and not a definition,
1894 it stays built in. */
1895 if (DECL_BUILT_IN (olddecl))
1897 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1898 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1899 /* If we're keeping the built-in definition, keep the rtl,
1900 regardless of declaration matches. */
1901 COPY_DECL_RTL (olddecl, newdecl);
1904 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1905 /* Don't clear out the arguments if we're redefining a function. */
1906 if (DECL_ARGUMENTS (olddecl))
1907 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1910 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1911 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1913 /* Now preserve various other info from the definition. */
1914 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1915 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1916 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1917 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1919 /* Warn about conflicting visibility specifications. */
1920 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1921 && DECL_VISIBILITY_SPECIFIED (newdecl)
1922 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1924 warning ("%J'%D': visibility attribute ignored because it",
1926 warning ("%Jconflicts with previous declaration here", olddecl);
1928 /* Choose the declaration which specified visibility. */
1929 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1931 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1932 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1935 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1939 function_size = sizeof (struct tree_decl);
1941 memcpy ((char *) olddecl + sizeof (struct tree_common),
1942 (char *) newdecl + sizeof (struct tree_common),
1943 function_size - sizeof (struct tree_common));
1945 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
1946 /* If newdecl is a template instantiation, it is possible that
1947 the following sequence of events has occurred:
1949 o A friend function was declared in a class template. The
1950 class template was instantiated.
1952 o The instantiation of the friend declaration was
1953 recorded on the instantiation list, and is newdecl.
1955 o Later, however, instantiate_class_template called pushdecl
1956 on the newdecl to perform name injection. But, pushdecl in
1957 turn called duplicate_decls when it discovered that another
1958 declaration of a global function with the same name already
1961 o Here, in duplicate_decls, we decided to clobber newdecl.
1963 If we're going to do that, we'd better make sure that
1964 olddecl, and not newdecl, is on the list of
1965 instantiations so that if we try to do the instantiation
1966 again we won't get the clobbered declaration. */
1967 reregister_specialization (newdecl,
1968 DECL_TI_TEMPLATE (newdecl),
1973 memcpy ((char *) olddecl + sizeof (struct tree_common),
1974 (char *) newdecl + sizeof (struct tree_common),
1975 sizeof (struct tree_decl) - sizeof (struct tree_common)
1976 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
1979 DECL_UID (olddecl) = olddecl_uid;
1981 DECL_FRIEND_P (olddecl) = 1;
1983 /* NEWDECL contains the merged attribute lists.
1984 Update OLDDECL to be the same. */
1985 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
1987 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
1988 so that encode_section_info has a chance to look at the new decl
1989 flags and attributes. */
1990 if (DECL_RTL_SET_P (olddecl)
1991 && (TREE_CODE (olddecl) == FUNCTION_DECL
1992 || (TREE_CODE (olddecl) == VAR_DECL
1993 && TREE_STATIC (olddecl))))
1994 make_decl_rtl (olddecl);
1999 /* Return zero if the declaration NEWDECL is valid
2000 when the declaration OLDDECL (assumed to be for the same name)
2001 has already been seen.
2002 Otherwise return an error message format string with a %s
2003 where the identifier should go. */
2006 redeclaration_error_message (tree newdecl, tree olddecl)
2008 if (TREE_CODE (newdecl) == TYPE_DECL)
2010 /* Because C++ can put things into name space for free,
2011 constructs like "typedef struct foo { ... } foo"
2012 would look like an erroneous redeclaration. */
2013 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2016 return "redefinition of `%#D'";
2018 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2020 /* If this is a pure function, its olddecl will actually be
2021 the original initialization to `0' (which we force to call
2022 abort()). Don't complain about redefinition in this case. */
2023 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl))
2026 /* If both functions come from different namespaces, this is not
2027 a redeclaration - this is a conflict with a used function. */
2028 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2029 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
2030 return "`%D' conflicts with used function";
2032 /* We'll complain about linkage mismatches in
2033 warn_extern_redeclared_static. */
2035 /* Defining the same name twice is no good. */
2036 if (DECL_INITIAL (olddecl) != NULL_TREE
2037 && DECL_INITIAL (newdecl) != NULL_TREE)
2039 if (DECL_NAME (olddecl) == NULL_TREE)
2040 return "`%#D' not declared in class";
2042 return "redefinition of `%#D'";
2046 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2050 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2052 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2053 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2054 return "redefinition of `%#D'";
2058 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2059 || (DECL_TEMPLATE_RESULT (newdecl)
2060 == DECL_TEMPLATE_RESULT (olddecl)))
2063 nt = DECL_TEMPLATE_RESULT (newdecl);
2064 if (DECL_TEMPLATE_INFO (nt))
2065 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2066 ot = DECL_TEMPLATE_RESULT (olddecl);
2067 if (DECL_TEMPLATE_INFO (ot))
2068 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2069 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2070 return "redefinition of `%#D'";
2074 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2076 /* Objects declared at top level: */
2077 /* If at least one is a reference, it's ok. */
2078 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2080 /* Reject two definitions. */
2081 return "redefinition of `%#D'";
2085 /* Objects declared with block scope: */
2086 /* Reject two definitions, and reject a definition
2087 together with an external reference. */
2088 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2089 return "redeclaration of `%#D'";
2094 /* Create a new label, named ID. */
2097 make_label_decl (tree id, int local_p)
2101 decl = build_decl (LABEL_DECL, id, void_type_node);
2103 DECL_CONTEXT (decl) = current_function_decl;
2104 DECL_MODE (decl) = VOIDmode;
2105 C_DECLARED_LABEL_FLAG (decl) = local_p;
2107 /* Say where one reference is to the label, for the sake of the
2108 error if it is not defined. */
2109 DECL_SOURCE_LOCATION (decl) = input_location;
2111 /* Record the fact that this identifier is bound to this label. */
2112 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2117 /* Record this label on the list of used labels so that we can check
2118 at the end of the function to see whether or not the label was
2119 actually defined, and so we can check when the label is defined whether
2120 this use is valid. */
2123 use_label (tree decl)
2125 if (named_label_uses == NULL
2126 || named_label_uses->names_in_scope != current_binding_level->names
2127 || named_label_uses->label_decl != decl)
2129 struct named_label_use_list *new_ent;
2130 new_ent = GGC_NEW (struct named_label_use_list);
2131 new_ent->label_decl = decl;
2132 new_ent->names_in_scope = current_binding_level->names;
2133 new_ent->binding_level = current_binding_level;
2134 new_ent->o_goto_locus = input_location;
2135 new_ent->next = named_label_uses;
2136 named_label_uses = new_ent;
2140 /* Look for a label named ID in the current function. If one cannot
2141 be found, create one. (We keep track of used, but undefined,
2142 labels, and complain about them at the end of a function.) */
2145 lookup_label (tree id)
2148 struct named_label_list *ent;
2150 timevar_push (TV_NAME_LOOKUP);
2151 /* You can't use labels at global scope. */
2152 if (current_function_decl == NULL_TREE)
2154 error ("label `%E' referenced outside of any function", id);
2155 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2158 /* See if we've already got this label. */
2159 decl = IDENTIFIER_LABEL_VALUE (id);
2160 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2161 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2163 /* Record this label on the list of labels used in this function.
2164 We do this before calling make_label_decl so that we get the
2165 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2166 ent = GGC_CNEW (struct named_label_list);
2167 ent->old_value = IDENTIFIER_LABEL_VALUE (id);
2168 ent->next = named_labels;
2171 /* We need a new label. */
2172 decl = make_label_decl (id, /*local_p=*/0);
2174 /* Now fill in the information we didn't have before. */
2175 ent->label_decl = decl;
2177 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2180 /* Declare a local label named ID. */
2183 declare_local_label (tree id)
2187 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2188 this scope we can restore the old value of
2189 IDENTIFIER_TYPE_VALUE. */
2190 current_binding_level->shadowed_labels
2191 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2192 current_binding_level->shadowed_labels);
2193 /* Look for the label. */
2194 decl = make_label_decl (id, /*local_p=*/1);
2195 /* Now fill in the information we didn't have before. */
2196 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
2201 /* Returns nonzero if it is ill-formed to jump past the declaration of
2202 DECL. Returns 2 if it's also a real problem. */
2205 decl_jump_unsafe (tree decl)
2207 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))
2210 if (DECL_INITIAL (decl) == NULL_TREE
2211 && pod_type_p (TREE_TYPE (decl)))
2214 /* This is really only important if we're crossing an initialization.
2215 The POD stuff is just pedantry; why should it matter if the class
2216 contains a field of pointer to member type? */
2217 if (DECL_INITIAL (decl)
2218 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))))
2223 /* Check that a single previously seen jump to a newly defined label
2224 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2225 the jump context; NAMES are the names in scope in LEVEL at the jump
2226 context; FILE and LINE are the source position of the jump or 0. */
2229 check_previous_goto_1 (tree decl,
2230 struct cp_binding_level* level,
2231 tree names, const location_t *locus)
2235 struct cp_binding_level *b = current_binding_level;
2236 for (; b; b = b->level_chain)
2238 tree new_decls = b->names;
2239 tree old_decls = (b == level ? names : NULL_TREE);
2240 for (; new_decls != old_decls;
2241 new_decls = TREE_CHAIN (new_decls))
2243 int problem = decl_jump_unsafe (new_decls);
2250 pedwarn ("jump to label `%D'", decl);
2252 pedwarn ("jump to case label");
2255 pedwarn ("%H from here", locus);
2260 cp_error_at (" crosses initialization of `%#D'",
2263 cp_pedwarn_at (" enters scope of non-POD `%#D'",
2269 if ((b->kind == sk_try || b->kind == sk_catch) && ! saw_eh)
2274 pedwarn ("jump to label `%D'", decl);
2276 pedwarn ("jump to case label");
2279 pedwarn ("%H from here", locus);
2282 if (b->kind == sk_try)
2283 error (" enters try block");
2285 error (" enters catch block");
2292 check_previous_goto (struct named_label_use_list* use)
2294 check_previous_goto_1 (use->label_decl, use->binding_level,
2295 use->names_in_scope, &use->o_goto_locus);
2299 check_switch_goto (struct cp_binding_level* level)
2301 check_previous_goto_1 (NULL_TREE, level, level->names, NULL);
2304 /* Check that any previously seen jumps to a newly defined label DECL
2305 are OK. Called by define_label. */
2308 check_previous_gotos (tree decl)
2310 struct named_label_use_list **usep;
2312 if (! TREE_USED (decl))
2315 for (usep = &named_label_uses; *usep; )
2317 struct named_label_use_list *use = *usep;
2318 if (use->label_decl == decl)
2320 check_previous_goto (use);
2324 usep = &(use->next);
2328 /* Check that a new jump to a label DECL is OK. Called by
2329 finish_goto_stmt. */
2332 check_goto (tree decl)
2336 struct named_label_list *lab;
2338 /* We can't know where a computed goto is jumping. So we assume
2340 if (! DECL_P (decl))
2343 /* If the label hasn't been defined yet, defer checking. */
2344 if (! DECL_INITIAL (decl))
2350 for (lab = named_labels; lab; lab = lab->next)
2351 if (decl == lab->label_decl)
2354 /* If the label is not on named_labels it's a gcc local label, so
2355 it must be in an outer scope, so jumping to it is always OK. */
2359 if ((lab->in_try_scope || lab->in_catch_scope || lab->bad_decls)
2362 cp_pedwarn_at ("jump to label `%D'", decl);
2363 pedwarn (" from here");
2367 for (bad = lab->bad_decls; bad; bad = TREE_CHAIN (bad))
2369 tree b = TREE_VALUE (bad);
2370 int u = decl_jump_unsafe (b);
2372 if (u > 1 && DECL_ARTIFICIAL (b))
2373 /* Can't skip init of __exception_info. */
2374 error ("%J enters catch block", b);
2376 cp_error_at (" skips initialization of `%#D'", b);
2378 cp_pedwarn_at (" enters scope of non-POD `%#D'", b);
2381 if (lab->in_try_scope)
2382 error (" enters try block");
2383 else if (lab->in_catch_scope)
2384 error (" enters catch block");
2387 /* Define a label, specifying the location in the source file.
2388 Return the LABEL_DECL node for the label. */
2391 define_label (location_t location, tree name)
2393 tree decl = lookup_label (name);
2394 struct named_label_list *ent;
2395 struct cp_binding_level *p;
2397 timevar_push (TV_NAME_LOOKUP);
2398 for (ent = named_labels; ent; ent = ent->next)
2399 if (ent->label_decl == decl)
2402 /* After labels, make any new cleanups in the function go into their
2403 own new (temporary) binding contour. */
2404 for (p = current_binding_level;
2405 p->kind != sk_function_parms;
2407 p->more_cleanups_ok = 0;
2409 if (name == get_identifier ("wchar_t"))
2410 pedwarn ("label named wchar_t");
2412 if (DECL_INITIAL (decl) != NULL_TREE)
2413 error ("duplicate label `%D'", decl);
2416 /* Mark label as having been defined. */
2417 DECL_INITIAL (decl) = error_mark_node;
2418 /* Say where in the source. */
2419 DECL_SOURCE_LOCATION (decl) = location;
2422 ent->names_in_scope = current_binding_level->names;
2423 ent->binding_level = current_binding_level;
2425 check_previous_gotos (decl);
2428 timevar_pop (TV_NAME_LOOKUP);
2434 struct cp_binding_level *level;
2435 struct cp_switch *next;
2436 /* The SWITCH_STMT being built. */
2438 /* A splay-tree mapping the low element of a case range to the high
2439 element, or NULL_TREE if there is no high element. Used to
2440 determine whether or not a new case label duplicates an old case
2441 label. We need a tree, rather than simply a hash table, because
2442 of the GNU case range extension. */
2446 /* A stack of the currently active switch statements. The innermost
2447 switch statement is on the top of the stack. There is no need to
2448 mark the stack for garbage collection because it is only active
2449 during the processing of the body of a function, and we never
2450 collect at that point. */
2452 static struct cp_switch *switch_stack;
2454 /* Called right after a switch-statement condition is parsed.
2455 SWITCH_STMT is the switch statement being parsed. */
2458 push_switch (tree switch_stmt)
2460 struct cp_switch *p = xmalloc (sizeof (struct cp_switch));
2461 p->level = current_binding_level;
2462 p->next = switch_stack;
2463 p->switch_stmt = switch_stmt;
2464 p->cases = splay_tree_new (case_compare, NULL, NULL);
2471 struct cp_switch *cs = switch_stack;
2473 /* Emit warnings as needed. */
2474 c_do_switch_warnings (cs->cases, cs->switch_stmt);
2476 splay_tree_delete (cs->cases);
2477 switch_stack = switch_stack->next;
2481 /* Note that we've seen a definition of a case label, and complain if this
2482 is a bad place for one. */
2485 finish_case_label (tree low_value, tree high_value)
2488 struct cp_binding_level *p;
2490 if (processing_template_decl)
2494 /* For templates, just add the case label; we'll do semantic
2495 analysis at instantiation-time. */
2496 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2497 return add_stmt (build_case_label (low_value, high_value, label));
2500 /* Find the condition on which this switch statement depends. */
2501 cond = SWITCH_COND (switch_stack->switch_stmt);
2502 if (cond && TREE_CODE (cond) == TREE_LIST)
2503 cond = TREE_VALUE (cond);
2505 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2506 low_value, high_value);
2508 check_switch_goto (switch_stack->level);
2510 /* After labels, make any new cleanups in the function go into their
2511 own new (temporary) binding contour. */
2512 for (p = current_binding_level;
2513 p->kind != sk_function_parms;
2515 p->more_cleanups_ok = 0;
2520 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2523 typename_hash (const void* k)
2528 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2529 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2534 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2537 typename_compare (const void * k1, const void * k2)
2546 d1 = TYPE_NAME (t1);
2547 d2 = TYPE_NAME (t2);
2549 return (DECL_NAME (d1) == DECL_NAME (d2)
2550 && TYPE_CONTEXT (t1) == TYPE_CONTEXT (t2)
2551 && ((TREE_TYPE (t1) != NULL_TREE)
2552 == (TREE_TYPE (t2) != NULL_TREE))
2553 && same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))
2554 && TYPENAME_TYPE_FULLNAME (t1) == TYPENAME_TYPE_FULLNAME (t2));
2557 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2558 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
2559 is non-NULL, this type is being created by the implicit typename
2560 extension, and BASE_TYPE is a type named `t' in some base class of
2561 `T' which depends on template parameters.
2563 Returns the new TYPENAME_TYPE. */
2565 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2568 build_typename_type (tree context, tree name, tree fullname)
2574 if (typename_htab == NULL)
2576 typename_htab = htab_create_ggc (61, &typename_hash,
2577 &typename_compare, NULL);
2580 /* Build the TYPENAME_TYPE. */
2581 t = make_aggr_type (TYPENAME_TYPE);
2582 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2583 TYPENAME_TYPE_FULLNAME (t) = fullname;
2585 /* Build the corresponding TYPE_DECL. */
2586 d = build_decl (TYPE_DECL, name, t);
2587 TYPE_NAME (TREE_TYPE (d)) = d;
2588 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2589 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2590 DECL_ARTIFICIAL (d) = 1;
2592 /* See if we already have this type. */
2593 e = htab_find_slot (typename_htab, t, INSERT);
2602 /* Resolve `typename CONTEXT::NAME'. Returns an appropriate type,
2603 unless an error occurs, in which case error_mark_node is returned.
2604 If we locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is
2605 set, we return that, rather than the _TYPE it corresponds to, in
2606 other cases we look through the type decl. If TF_ERROR is set,
2607 complain about errors, otherwise be quiet. */
2610 make_typename_type (tree context, tree name, tsubst_flags_t complain)
2614 if (name == error_mark_node
2615 || context == NULL_TREE
2616 || context == error_mark_node)
2617 return error_mark_node;
2621 if (!(TYPE_LANG_SPECIFIC (name)
2622 && (CLASSTYPE_IS_TEMPLATE (name)
2623 || CLASSTYPE_USE_TEMPLATE (name))))
2624 name = TYPE_IDENTIFIER (name);
2626 /* Create a TEMPLATE_ID_EXPR for the type. */
2627 name = build_nt (TEMPLATE_ID_EXPR,
2628 CLASSTYPE_TI_TEMPLATE (name),
2629 CLASSTYPE_TI_ARGS (name));
2631 else if (TREE_CODE (name) == TYPE_DECL)
2632 name = DECL_NAME (name);
2636 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2638 name = TREE_OPERAND (name, 0);
2639 if (TREE_CODE (name) == TEMPLATE_DECL)
2640 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2642 if (TREE_CODE (name) == TEMPLATE_DECL)
2644 error ("`%D' used without template parameters", name);
2645 return error_mark_node;
2647 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2649 if (TREE_CODE (context) == NAMESPACE_DECL)
2651 /* We can get here from typename_sub0 in the explicit_template_type
2652 expansion. Just fail. */
2653 if (complain & tf_error)
2654 error ("no class template named `%#T' in `%#T'",
2656 return error_mark_node;
2659 if (!dependent_type_p (context)
2660 || currently_open_class (context))
2662 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2664 tree tmpl = NULL_TREE;
2665 if (IS_AGGR_TYPE (context))
2666 tmpl = lookup_field (context, name, 0, false);
2667 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2669 if (complain & tf_error)
2670 error ("no class template named `%#T' in `%#T'",
2672 return error_mark_node;
2675 if (complain & tf_error)
2676 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2678 return lookup_template_class (tmpl,
2679 TREE_OPERAND (fullname, 1),
2681 /*entering_scope=*/0,
2682 tf_error | tf_warning | tf_user);
2688 if (!IS_AGGR_TYPE (context))
2690 if (complain & tf_error)
2691 error ("no type named `%#T' in `%#T'", name, context);
2692 return error_mark_node;
2695 t = lookup_field (context, name, 0, true);
2698 if (TREE_CODE (t) != TYPE_DECL)
2700 if (complain & tf_error)
2701 error ("no type named `%#T' in `%#T'", name, context);
2702 return error_mark_node;
2705 if (complain & tf_error)
2706 perform_or_defer_access_check (TYPE_BINFO (context), t);
2708 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2716 /* If the CONTEXT is not a template type, then either the field is
2717 there now or its never going to be. */
2718 if (!dependent_type_p (context))
2720 if (complain & tf_error)
2721 error ("no type named `%#T' in `%#T'", name, context);
2722 return error_mark_node;
2725 return build_typename_type (context, name, fullname);
2728 /* Resolve `CONTEXT::template NAME'. Returns an appropriate type,
2729 unless an error occurs, in which case error_mark_node is returned.
2730 If we locate a TYPE_DECL, we return that, rather than the _TYPE it
2731 corresponds to. If COMPLAIN zero, don't complain about any errors
2735 make_unbound_class_template (tree context, tree name, tsubst_flags_t complain)
2741 name = TYPE_IDENTIFIER (name);
2742 else if (DECL_P (name))
2743 name = DECL_NAME (name);
2744 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2746 if (!dependent_type_p (context)
2747 || currently_open_class (context))
2749 tree tmpl = NULL_TREE;
2751 if (IS_AGGR_TYPE (context))
2752 tmpl = lookup_field (context, name, 0, false);
2754 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2756 if (complain & tf_error)
2757 error ("no class template named `%#T' in `%#T'", name, context);
2758 return error_mark_node;
2761 if (complain & tf_error)
2762 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2767 /* Build the UNBOUND_CLASS_TEMPLATE. */
2768 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2769 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2770 TREE_TYPE (t) = NULL_TREE;
2772 /* Build the corresponding TEMPLATE_DECL. */
2773 d = build_decl (TEMPLATE_DECL, name, t);
2774 TYPE_NAME (TREE_TYPE (d)) = d;
2775 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2776 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2777 DECL_ARTIFICIAL (d) = 1;
2784 /* Push the declarations of builtin types into the namespace.
2785 RID_INDEX is the index of the builtin type in the array
2786 RID_POINTERS. NAME is the name used when looking up the builtin
2787 type. TYPE is the _TYPE node for the builtin type. */
2790 record_builtin_type (enum rid rid_index,
2794 tree rname = NULL_TREE, tname = NULL_TREE;
2795 tree tdecl = NULL_TREE;
2797 if ((int) rid_index < (int) RID_MAX)
2798 rname = ridpointers[(int) rid_index];
2800 tname = get_identifier (name);
2802 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2803 eliminated. Built-in types should not be looked up name; their
2804 names are keywords that the parser can recognize. However, there
2805 is code in c-common.c that uses identifier_global_value to look
2806 up built-in types by name. */
2809 tdecl = build_decl (TYPE_DECL, tname, type);
2810 DECL_ARTIFICIAL (tdecl) = 1;
2811 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2817 tdecl = build_decl (TYPE_DECL, rname, type);
2818 DECL_ARTIFICIAL (tdecl) = 1;
2820 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2823 if (!TYPE_NAME (type))
2824 TYPE_NAME (type) = tdecl;
2827 debug_hooks->type_decl (tdecl, 0);
2830 /* Record one of the standard Java types.
2831 * Declare it as having the given NAME.
2832 * If SIZE > 0, it is the size of one of the integral types;
2833 * otherwise it is the negative of the size of one of the other types. */
2836 record_builtin_java_type (const char* name, int size)
2840 type = make_signed_type (size);
2841 else if (size > -32)
2842 { /* "__java_char" or ""__java_boolean". */
2843 type = make_unsigned_type (-size);
2844 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2847 { /* "__java_float" or ""__java_double". */
2848 type = make_node (REAL_TYPE);
2849 TYPE_PRECISION (type) = - size;
2852 record_builtin_type (RID_MAX, name, type);
2853 decl = TYPE_NAME (type);
2855 /* Suppress generate debug symbol entries for these types,
2856 since for normal C++ they are just clutter.
2857 However, push_lang_context undoes this if extern "Java" is seen. */
2858 DECL_IGNORED_P (decl) = 1;
2860 TYPE_FOR_JAVA (type) = 1;
2864 /* Push a type into the namespace so that the back-ends ignore it. */
2867 record_unknown_type (tree type, const char* name)
2869 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
2870 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2871 DECL_IGNORED_P (decl) = 1;
2872 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
2873 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
2874 TYPE_ALIGN (type) = 1;
2875 TYPE_USER_ALIGN (type) = 0;
2876 TYPE_MODE (type) = TYPE_MODE (void_type_node);
2879 /* An string for which we should create an IDENTIFIER_NODE at
2882 typedef struct predefined_identifier
2884 /* The name of the identifier. */
2885 const char *const name;
2886 /* The place where the IDENTIFIER_NODE should be stored. */
2888 /* Nonzero if this is the name of a constructor or destructor. */
2889 const int ctor_or_dtor_p;
2890 } predefined_identifier;
2892 /* Create all the predefined identifiers. */
2895 initialize_predefined_identifiers (void)
2897 const predefined_identifier *pid;
2899 /* A table of identifiers to create at startup. */
2900 static const predefined_identifier predefined_identifiers[] = {
2901 { "C++", &lang_name_cplusplus, 0 },
2902 { "C", &lang_name_c, 0 },
2903 { "Java", &lang_name_java, 0 },
2904 { CTOR_NAME, &ctor_identifier, 1 },
2905 { "__base_ctor", &base_ctor_identifier, 1 },
2906 { "__comp_ctor", &complete_ctor_identifier, 1 },
2907 { DTOR_NAME, &dtor_identifier, 1 },
2908 { "__comp_dtor", &complete_dtor_identifier, 1 },
2909 { "__base_dtor", &base_dtor_identifier, 1 },
2910 { "__deleting_dtor", &deleting_dtor_identifier, 1 },
2911 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
2912 { "nelts", &nelts_identifier, 0 },
2913 { THIS_NAME, &this_identifier, 0 },
2914 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
2915 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
2916 { "_vptr", &vptr_identifier, 0 },
2917 { "__vtt_parm", &vtt_parm_identifier, 0 },
2918 { "::", &global_scope_name, 0 },
2919 { "std", &std_identifier, 0 },
2923 for (pid = predefined_identifiers; pid->name; ++pid)
2925 *pid->node = get_identifier (pid->name);
2926 if (pid->ctor_or_dtor_p)
2927 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
2931 /* Create the predefined scalar types of C,
2932 and some nodes representing standard constants (0, 1, (void *)0).
2933 Initialize the global binding level.
2934 Make definitions for built-in primitive functions. */
2937 cxx_init_decl_processing (void)
2940 tree void_ftype_ptr;
2942 build_common_tree_nodes (flag_signed_char, false);
2944 /* Create all the identifiers we need. */
2945 initialize_predefined_identifiers ();
2947 /* Create the global variables. */
2948 push_to_top_level ();
2950 current_function_decl = NULL_TREE;
2951 current_binding_level = NULL;
2952 /* Enter the global namespace. */
2953 gcc_assert (global_namespace == NULL_TREE);
2954 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
2956 begin_scope (sk_namespace, global_namespace);
2958 current_lang_name = NULL_TREE;
2960 /* Adjust various flags based on command-line settings. */
2961 if (!flag_permissive)
2962 flag_pedantic_errors = 1;
2963 if (!flag_no_inline)
2965 flag_inline_trees = 1;
2968 if (flag_inline_functions)
2970 flag_inline_trees = 2;
2971 flag_inline_functions = 0;
2974 /* Force minimum function alignment if using the least significant
2975 bit of function pointers to store the virtual bit. */
2976 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
2977 && force_align_functions_log < 1)
2978 force_align_functions_log = 1;
2981 current_lang_name = lang_name_c;
2983 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
2984 TREE_TYPE (error_mark_list) = error_mark_node;
2986 /* Create the `std' namespace. */
2987 push_namespace (std_identifier);
2988 std_node = current_namespace;
2991 c_common_nodes_and_builtins ();
2993 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
2994 java_short_type_node = record_builtin_java_type ("__java_short", 16);
2995 java_int_type_node = record_builtin_java_type ("__java_int", 32);
2996 java_long_type_node = record_builtin_java_type ("__java_long", 64);
2997 java_float_type_node = record_builtin_java_type ("__java_float", -32);
2998 java_double_type_node = record_builtin_java_type ("__java_double", -64);
2999 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3000 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3002 integer_two_node = build_int_cst (NULL_TREE, 2);
3003 integer_three_node = build_int_cst (NULL_TREE, 3);
3005 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3006 truthvalue_type_node = boolean_type_node;
3007 truthvalue_false_node = boolean_false_node;
3008 truthvalue_true_node = boolean_true_node;
3010 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3013 record_builtin_type (RID_MAX, NULL, string_type_node);
3016 delta_type_node = ptrdiff_type_node;
3017 vtable_index_type = ptrdiff_type_node;
3019 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3020 void_ftype = build_function_type (void_type_node, void_list_node);
3021 void_ftype_ptr = build_function_type (void_type_node,
3022 tree_cons (NULL_TREE,
3026 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3028 /* C++ extensions */
3030 unknown_type_node = make_node (UNKNOWN_TYPE);
3031 record_unknown_type (unknown_type_node, "unknown type");
3033 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3034 TREE_TYPE (unknown_type_node) = unknown_type_node;
3036 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3038 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3039 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3042 /* Make sure we get a unique function type, so we can give
3043 its pointer type a name. (This wins for gdb.) */
3044 tree vfunc_type = make_node (FUNCTION_TYPE);
3045 TREE_TYPE (vfunc_type) = integer_type_node;
3046 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3047 layout_type (vfunc_type);
3049 vtable_entry_type = build_pointer_type (vfunc_type);
3051 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3054 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3055 layout_type (vtbl_type_node);
3056 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3057 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3058 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3059 layout_type (vtbl_ptr_type_node);
3060 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3062 push_namespace (get_identifier ("__cxxabiv1"));
3063 abi_node = current_namespace;
3066 global_type_node = make_node (LANG_TYPE);
3067 record_unknown_type (global_type_node, "global type");
3070 current_lang_name = lang_name_cplusplus;
3074 tree bad_alloc_type_node;
3075 tree bad_alloc_decl;
3076 tree newtype, deltype;
3077 tree ptr_ftype_sizetype;
3079 push_namespace (std_identifier);
3080 bad_alloc_id = get_identifier ("bad_alloc");
3081 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3082 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3084 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3085 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3086 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3090 = build_function_type (ptr_type_node,
3091 tree_cons (NULL_TREE,
3094 newtype = build_exception_variant
3095 (ptr_ftype_sizetype, add_exception_specifier
3096 (NULL_TREE, bad_alloc_type_node, -1));
3097 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3098 push_cp_library_fn (NEW_EXPR, newtype);
3099 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3100 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3101 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3105 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3107 /* Perform other language dependent initializations. */
3108 init_class_processing ();
3109 init_rtti_processing ();
3111 if (flag_exceptions)
3112 init_exception_processing ();
3114 if (! supports_one_only ())
3117 make_fname_decl = cp_make_fname_decl;
3118 start_fname_decls ();
3120 /* Show we use EH for cleanups. */
3121 if (flag_exceptions)
3122 using_eh_for_cleanups ();
3125 /* Generate an initializer for a function naming variable from
3126 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3127 filled in with the type of the init. */
3130 cp_fname_init (const char* name, tree *type_p)
3132 tree domain = NULL_TREE;
3134 tree init = NULL_TREE;
3139 length = strlen (name);
3140 domain = build_index_type (size_int (length));
3141 init = build_string (length + 1, name);
3144 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3145 type = build_cplus_array_type (type, domain);
3150 TREE_TYPE (init) = type;
3152 init = error_mark_node;
3157 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3158 decl, NAME is the initialization string and TYPE_DEP indicates whether
3159 NAME depended on the type of the function. We make use of that to detect
3160 __PRETTY_FUNCTION__ inside a template fn. This is being done
3161 lazily at the point of first use, so we mustn't push the decl now. */
3164 cp_make_fname_decl (tree id, int type_dep)
3166 const char *const name = (type_dep && processing_template_decl
3167 ? NULL : fname_as_string (type_dep));
3169 tree init = cp_fname_init (name, &type);
3170 tree decl = build_decl (VAR_DECL, id, type);
3173 free ((char *) name);
3175 /* As we're using pushdecl_with_scope, we must set the context. */
3176 DECL_CONTEXT (decl) = current_function_decl;
3177 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3179 TREE_STATIC (decl) = 1;
3180 TREE_READONLY (decl) = 1;
3181 DECL_ARTIFICIAL (decl) = 1;
3182 DECL_INITIAL (decl) = init;
3184 TREE_USED (decl) = 1;
3186 if (current_function_decl)
3188 struct cp_binding_level *b = current_binding_level;
3189 while (b->level_chain->kind != sk_function_parms)
3191 pushdecl_with_scope (decl, b);
3192 cp_finish_decl (decl, init, NULL_TREE, LOOKUP_ONLYCONVERTING);
3195 pushdecl_top_level_and_finish (decl, init);
3200 /* Make a definition for a builtin function named NAME in the current
3201 namespace, whose data type is TYPE and whose context is CONTEXT.
3202 TYPE should be a function type with argument types.
3204 CLASS and CODE tell later passes how to compile calls to this function.
3205 See tree.h for possible values.
3207 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3208 the name to be called if we can't opencode the function.
3209 If ATTRS is nonzero, use that for the function's attribute
3213 builtin_function_1 (const char* name,
3216 enum built_in_function code,
3217 enum built_in_class class,
3218 const char* libname,
3221 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3222 DECL_BUILT_IN_CLASS (decl) = class;
3223 DECL_FUNCTION_CODE (decl) = code;
3224 DECL_CONTEXT (decl) = context;
3228 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3229 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3230 function in the namespace. */
3232 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3234 /* Warn if a function in the namespace for users
3235 is used without an occasion to consider it declared. */
3236 if (name[0] != '_' || name[1] != '_')
3237 DECL_ANTICIPATED (decl) = 1;
3239 /* Possibly apply some default attributes to this built-in function. */
3241 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3243 decl_attributes (&decl, NULL_TREE, 0);
3248 /* Entry point for the benefit of c_common_nodes_and_builtins.
3250 Make a definition for a builtin function named NAME and whose data type
3251 is TYPE. TYPE should be a function type with argument types. This
3252 function places the anticipated declaration in the global namespace
3253 and additionally in the std namespace if appropriate.
3255 CLASS and CODE tell later passes how to compile calls to this function.
3256 See tree.h for possible values.
3258 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3259 the name to be called if we can't opencode the function.
3261 If ATTRS is nonzero, use that for the function's attribute
3265 builtin_function (const char* name,
3268 enum built_in_class cl,
3269 const char* libname,
3272 /* All builtins that don't begin with an '_' should additionally
3273 go in the 'std' namespace. */
3276 push_namespace (std_identifier);
3277 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3281 return builtin_function_1 (name, type, NULL_TREE, code,
3282 cl, libname, attrs);
3285 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3286 function. Not called directly. */
3289 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3291 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3292 DECL_EXTERNAL (fn) = 1;
3293 TREE_PUBLIC (fn) = 1;
3294 DECL_ARTIFICIAL (fn) = 1;
3295 TREE_NOTHROW (fn) = 1;
3296 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3297 SET_DECL_LANGUAGE (fn, lang_c);
3298 /* Runtime library routines are, by definition, available in an
3299 external shared object. */
3300 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3301 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3305 /* Returns the _DECL for a library function with C linkage.
3306 We assume that such functions never throw; if this is incorrect,
3307 callers should unset TREE_NOTHROW. */
3310 build_library_fn (tree name, tree type)
3312 return build_library_fn_1 (name, ERROR_MARK, type);
3315 /* Returns the _DECL for a library function with C++ linkage. */
3318 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3320 tree fn = build_library_fn_1 (name, operator_code, type);
3321 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3322 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3323 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3327 /* Like build_library_fn, but takes a C string instead of an
3331 build_library_fn_ptr (const char* name, tree type)
3333 return build_library_fn (get_identifier (name), type);
3336 /* Like build_cp_library_fn, but takes a C string instead of an
3340 build_cp_library_fn_ptr (const char* name, tree type)
3342 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3345 /* Like build_library_fn, but also pushes the function so that we will
3346 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3349 push_library_fn (tree name, tree type)
3351 tree fn = build_library_fn (name, type);
3352 pushdecl_top_level (fn);
3356 /* Like build_cp_library_fn, but also pushes the function so that it
3357 will be found by normal lookup. */
3360 push_cp_library_fn (enum tree_code operator_code, tree type)
3362 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3369 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3373 push_void_library_fn (tree name, tree parmtypes)
3375 tree type = build_function_type (void_type_node, parmtypes);
3376 return push_library_fn (name, type);
3379 /* Like push_library_fn, but also note that this function throws
3380 and does not return. Used for __throw_foo and the like. */
3383 push_throw_library_fn (tree name, tree type)
3385 tree fn = push_library_fn (name, type);
3386 TREE_THIS_VOLATILE (fn) = 1;
3387 TREE_NOTHROW (fn) = 0;
3391 /* When we call finish_struct for an anonymous union, we create
3392 default copy constructors and such. But, an anonymous union
3393 shouldn't have such things; this function undoes the damage to the
3394 anonymous union type T.
3396 (The reason that we create the synthesized methods is that we don't
3397 distinguish `union { int i; }' from `typedef union { int i; } U'.
3398 The first is an anonymous union; the second is just an ordinary
3402 fixup_anonymous_aggr (tree t)
3406 /* Wipe out memory of synthesized methods. */
3407 TYPE_HAS_CONSTRUCTOR (t) = 0;
3408 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3409 TYPE_HAS_INIT_REF (t) = 0;
3410 TYPE_HAS_CONST_INIT_REF (t) = 0;
3411 TYPE_HAS_ASSIGN_REF (t) = 0;
3412 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3414 /* Splice the implicitly generated functions out of the TYPE_METHODS
3416 q = &TYPE_METHODS (t);
3419 if (DECL_ARTIFICIAL (*q))
3420 *q = TREE_CHAIN (*q);
3422 q = &TREE_CHAIN (*q);
3425 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3426 if (TYPE_METHODS (t))
3427 error ("%Jan anonymous union cannot have function members",
3428 TYPE_MAIN_DECL (t));
3430 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3431 assignment operators (because they cannot have these methods themselves).
3432 For anonymous unions this is already checked because they are not allowed
3433 in any union, otherwise we have to check it. */
3434 if (TREE_CODE (t) != UNION_TYPE)
3438 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3439 if (TREE_CODE (field) == FIELD_DECL)
3441 type = TREE_TYPE (field);
3442 if (CLASS_TYPE_P (type))
3444 if (TYPE_NEEDS_CONSTRUCTING (type))
3445 cp_error_at ("member %#D' with constructor not allowed in anonymous aggregate",
3447 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3448 cp_error_at ("member %#D' with destructor not allowed in anonymous aggregate",
3450 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3451 cp_error_at ("member %#D' with copy assignment operator not allowed in anonymous aggregate",
3458 /* Make sure that a declaration with no declarator is well-formed, i.e.
3459 just declares a tagged type or anonymous union.
3461 Returns the type declared; or NULL_TREE if none. */
3464 check_tag_decl (cp_decl_specifier_seq *declspecs)
3466 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3467 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3468 /* If a class, struct, or enum type is declared by the DECLSPECS
3469 (i.e, if a class-specifier, enum-specifier, or non-typename
3470 elaborated-type-specifier appears in the DECLSPECS),
3471 DECLARED_TYPE is set to the corresponding type. */
3472 tree declared_type = NULL_TREE;
3473 bool error_p = false;
3475 if (declspecs->multiple_types_p)
3476 error ("multiple types in one declaration");
3477 else if (declspecs->redefined_builtin_type)
3479 if (!in_system_header)
3480 pedwarn ("redeclaration of C++ built-in type %qT",
3481 declspecs->redefined_builtin_type);
3485 if (TYPE_P (declspecs->type)
3486 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3487 && IS_AGGR_TYPE (declspecs->type))
3488 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3489 declared_type = declspecs->type;
3490 else if (declspecs->type == error_mark_node)
3492 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3493 pedwarn ("declaration does not declare anything");
3494 /* Check for an anonymous union. */
3495 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3496 && TYPE_ANONYMOUS_P (declared_type))
3498 /* 7/3 In a simple-declaration, the optional init-declarator-list
3499 can be omitted only when declaring a class (clause 9) or
3500 enumeration (7.2), that is, when the decl-specifier-seq contains
3501 either a class-specifier, an elaborated-type-specifier with
3502 a class-key (9.1), or an enum-specifier. In these cases and
3503 whenever a class-specifier or enum-specifier is present in the
3504 decl-specifier-seq, the identifiers in these specifiers are among
3505 the names being declared by the declaration (as class-name,
3506 enum-names, or enumerators, depending on the syntax). In such
3507 cases, and except for the declaration of an unnamed bit-field (9.6),
3508 the decl-specifier-seq shall introduce one or more names into the
3509 program, or shall redeclare a name introduced by a previous
3510 declaration. [Example:
3511 enum { }; // ill-formed
3512 typedef class { }; // ill-formed
3516 error ("missing type-name in typedef-declaration");
3519 /* Anonymous unions are objects, so they can have specifiers. */;
3520 SET_ANON_AGGR_TYPE_P (declared_type);
3522 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3523 && !in_system_header)
3524 pedwarn ("ISO C++ prohibits anonymous structs");
3529 if (declspecs->specs[(int)ds_inline]
3530 || declspecs->specs[(int)ds_virtual])
3531 error ("`%s' can only be specified for functions",
3532 declspecs->specs[(int)ds_inline]
3533 ? "inline" : "virtual");
3535 && (!current_class_type
3536 || current_scope () != current_class_type))
3537 error ("`friend' can only be specified inside a class");
3538 else if (declspecs->specs[(int)ds_explicit])
3539 error ("`explicit' can only be specified for constructors");
3540 else if (declspecs->storage_class)
3541 error ("a storage class can only be specified for objects "
3543 else if (declspecs->specs[(int)ds_const]
3544 || declspecs->specs[(int)ds_volatile]
3545 || declspecs->specs[(int)ds_restrict]
3546 || declspecs->specs[(int)ds_thread])
3547 error ("qualifiers can only be specified for objects "
3551 return declared_type;
3554 /* Called when a declaration is seen that contains no names to declare.
3555 If its type is a reference to a structure, union or enum inherited
3556 from a containing scope, shadow that tag name for the current scope
3557 with a forward reference.
3558 If its type defines a new named structure or union
3559 or defines an enum, it is valid but we need not do anything here.
3560 Otherwise, it is an error.
3562 C++: may have to grok the declspecs to learn about static,
3563 complain for anonymous unions.
3565 Returns the TYPE declared -- or NULL_TREE if none. */
3568 shadow_tag (cp_decl_specifier_seq *declspecs)
3570 tree t = check_tag_decl (declspecs);
3575 maybe_process_partial_specialization (t);
3577 /* This is where the variables in an anonymous union are
3578 declared. An anonymous union declaration looks like:
3580 because there is no declarator after the union, the parser
3581 sends that declaration here. */
3582 if (ANON_AGGR_TYPE_P (t))
3584 fixup_anonymous_aggr (t);
3586 if (TYPE_FIELDS (t))
3588 tree decl = grokdeclarator (/*declarator=*/NULL,
3589 declspecs, NORMAL, 0, NULL);
3590 finish_anon_union (decl);
3597 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3600 groktypename (cp_decl_specifier_seq *type_specifiers,
3601 const cp_declarator *declarator)
3605 attrs = type_specifiers->attributes;
3606 type_specifiers->attributes = NULL_TREE;
3607 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3609 cplus_decl_attributes (&type, attrs, 0);
3613 /* Decode a declarator in an ordinary declaration or data definition.
3614 This is called as soon as the type information and variable name
3615 have been parsed, before parsing the initializer if any.
3616 Here we create the ..._DECL node, fill in its type,
3617 and put it on the list of decls for the current context.
3618 The ..._DECL node is returned as the value.
3620 Exception: for arrays where the length is not specified,
3621 the type is left null, to be filled in by `cp_finish_decl'.
3623 Function definitions do not come here; they go to start_function
3624 instead. However, external and forward declarations of functions
3625 do go through here. Structure field declarations are done by
3626 grokfield and not through here. */
3629 start_decl (const cp_declarator *declarator,
3630 cp_decl_specifier_seq *declspecs,
3633 tree prefix_attributes,
3640 /* This should only be done once on the top most decl. */
3641 if (have_extern_spec)
3643 declspecs->storage_class = sc_extern;
3644 have_extern_spec = false;
3647 /* An object declared as __attribute__((deprecated)) suppresses
3648 warnings of uses of other deprecated items. */
3649 if (lookup_attribute ("deprecated", attributes))
3650 deprecated_state = DEPRECATED_SUPPRESS;
3652 attributes = chainon (attributes, prefix_attributes);
3654 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3657 deprecated_state = DEPRECATED_NORMAL;
3659 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
3662 type = TREE_TYPE (decl);
3664 if (type == error_mark_node)
3667 context = DECL_CONTEXT (decl);
3670 *pop_scope_p = push_scope (context);
3672 *pop_scope_p = false;
3674 /* We are only interested in class contexts, later. */
3675 if (context && TREE_CODE (context) == NAMESPACE_DECL)
3676 context = NULL_TREE;
3679 /* Is it valid for this decl to have an initializer at all?
3680 If not, set INITIALIZED to zero, which will indirectly
3681 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3682 switch (TREE_CODE (decl))
3685 error ("typedef `%D' is initialized (use __typeof__ instead)", decl);
3690 error ("function `%#D' is initialized like a variable", decl);
3700 if (! toplevel_bindings_p ()
3701 && DECL_EXTERNAL (decl))
3702 warning ("declaration of `%#D' has `extern' and is initialized",
3704 DECL_EXTERNAL (decl) = 0;
3705 if (toplevel_bindings_p ())
3706 TREE_STATIC (decl) = 1;
3708 /* Tell `pushdecl' this is an initialized decl
3709 even though we don't yet have the initializer expression.
3710 Also tell `cp_finish_decl' it may store the real initializer. */
3711 DECL_INITIAL (decl) = error_mark_node;
3714 /* Set attributes here so if duplicate decl, will have proper attributes. */
3715 cplus_decl_attributes (&decl, attributes, 0);
3717 /* If #pragma weak was used, mark the decl weak now. */
3718 if (global_scope_p (current_binding_level))
3719 maybe_apply_pragma_weak (decl);
3721 if (TREE_CODE (decl) == FUNCTION_DECL
3722 && DECL_DECLARED_INLINE_P (decl)
3723 && DECL_UNINLINABLE (decl)
3724 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3725 warning ("%Jinline function '%D' given attribute noinline", decl, decl);
3727 if (context && COMPLETE_TYPE_P (complete_type (context)))
3729 if (TREE_CODE (decl) == VAR_DECL)
3731 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3732 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3733 error ("`%#D' is not a static member of `%#T'", decl, context);
3736 if (DECL_CONTEXT (field) != context)
3738 if (!same_type_p (DECL_CONTEXT (field), context))
3739 pedwarn ("ISO C++ does not permit `%T::%D' to be defined as `%T::%D'",
3740 DECL_CONTEXT (field), DECL_NAME (decl),
3741 context, DECL_NAME (decl));
3742 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3744 /* Static data member are tricky; an in-class initialization
3745 still doesn't provide a definition, so the in-class
3746 declaration will have DECL_EXTERNAL set, but will have an
3747 initialization. Thus, duplicate_decls won't warn
3748 about this situation, and so we check here. */
3749 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
3750 error ("duplicate initialization of %D", decl);
3751 if (duplicate_decls (decl, field))
3757 tree field = check_classfn (context, decl,
3758 (processing_template_decl
3759 > template_class_depth (context))
3760 ? current_template_parms
3762 if (field && duplicate_decls (decl, field))
3766 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3767 DECL_IN_AGGR_P (decl) = 0;
3768 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3769 || CLASSTYPE_TEMPLATE_INSTANTIATION (context))
3771 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3772 /* [temp.expl.spec] An explicit specialization of a static data
3773 member of a template is a definition if the declaration
3774 includes an initializer; otherwise, it is a declaration.
3776 We check for processing_specialization so this only applies
3777 to the new specialization syntax. */
3778 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
3779 DECL_EXTERNAL (decl) = 1;
3782 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3783 pedwarn ("declaration of `%#D' outside of class is not definition",
3787 /* Enter this declaration into the symbol table. */
3788 tem = maybe_push_decl (decl);
3790 if (processing_template_decl)
3791 tem = push_template_decl (tem);
3792 if (tem == error_mark_node)
3793 return error_mark_node;
3795 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3796 /* Tell the back-end to use or not use .common as appropriate. If we say
3797 -fconserve-space, we want this to save .data space, at the expense of
3798 wrong semantics. If we say -fno-conserve-space, we want this to
3799 produce errors about redefs; to do this we force variables into the
3801 DECL_COMMON (tem) = ((TREE_CODE (tem) != VAR_DECL
3802 || !DECL_THREAD_LOCAL (tem))
3803 && (flag_conserve_space || ! TREE_PUBLIC (tem)));
3806 if (! processing_template_decl)
3813 start_decl_1 (tree decl)
3815 tree type = TREE_TYPE (decl);
3816 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
3818 if (type == error_mark_node)
3822 /* Is it valid for this decl to have an initializer at all?
3823 If not, set INITIALIZED to zero, which will indirectly
3824 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3826 /* Don't allow initializations for incomplete types except for
3827 arrays which might be completed by the initialization. */
3828 if (COMPLETE_TYPE_P (complete_type (type)))
3829 ; /* A complete type is ok. */
3830 else if (TREE_CODE (type) != ARRAY_TYPE)
3832 error ("variable `%#D' has initializer but incomplete type",
3835 type = TREE_TYPE (decl) = error_mark_node;
3837 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3839 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3840 error ("elements of array `%#D' have incomplete type", decl);
3841 /* else we already gave an error in start_decl. */
3847 && TREE_CODE (decl) != TYPE_DECL
3848 && TREE_CODE (decl) != TEMPLATE_DECL
3849 && type != error_mark_node
3850 && IS_AGGR_TYPE (type)
3851 && ! DECL_EXTERNAL (decl))
3853 if ((! processing_template_decl || ! uses_template_parms (type))
3854 && !COMPLETE_TYPE_P (complete_type (type)))
3856 error ("aggregate `%#D' has incomplete type and cannot be defined",
3858 /* Change the type so that assemble_variable will give
3859 DECL an rtl we can live with: (mem (const_int 0)). */
3860 type = TREE_TYPE (decl) = error_mark_node;
3864 /* If any base type in the hierarchy of TYPE needs a constructor,
3865 then we set initialized to 1. This way any nodes which are
3866 created for the purposes of initializing this aggregate
3867 will live as long as it does. This is necessary for global
3868 aggregates which do not have their initializers processed until
3869 the end of the file. */
3870 initialized = TYPE_NEEDS_CONSTRUCTING (type);
3875 DECL_INITIAL (decl) = NULL_TREE;
3877 /* Create a new scope to hold this declaration if necessary.
3878 Whether or not a new scope is necessary cannot be determined
3879 until after the type has been completed; if the type is a
3880 specialization of a class template it is not until after
3881 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3882 will be set correctly. */
3883 maybe_push_cleanup_level (type);
3886 /* Handle initialization of references. DECL, TYPE, and INIT have the
3887 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3888 but will be set to a new CLEANUP_STMT if a temporary is created
3889 that must be destroyed subsequently.
3891 Returns an initializer expression to use to initialize DECL, or
3892 NULL if the initialization can be performed statically.
3894 Quotes on semantics can be found in ARM 8.4.3. */
3897 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
3901 if (init == NULL_TREE)
3903 if ((DECL_LANG_SPECIFIC (decl) == 0
3904 || DECL_IN_AGGR_P (decl) == 0)
3905 && ! DECL_THIS_EXTERN (decl))
3906 error ("`%D' declared as reference but not initialized", decl);
3910 if (TREE_CODE (init) == CONSTRUCTOR)
3912 error ("ISO C++ forbids use of initializer list to initialize reference `%D'", decl);
3916 if (TREE_CODE (init) == TREE_LIST)
3917 init = build_x_compound_expr_from_list (init, "initializer");
3919 if (TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE)
3920 init = convert_from_reference (init);
3922 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
3923 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
3924 /* Note: default conversion is only called in very special cases. */
3925 init = decay_conversion (init);
3927 /* Convert INIT to the reference type TYPE. This may involve the
3928 creation of a temporary, whose lifetime must be the same as that
3929 of the reference. If so, a DECL_EXPR for the temporary will be
3930 added just after the DECL_EXPR for DECL. That's why we don't set
3931 DECL_INITIAL for local references (instead assigning to them
3932 explicitly); we need to allow the temporary to be initialized
3934 tmp = initialize_reference (type, init, decl, cleanup);
3936 if (tmp == error_mark_node)
3938 else if (tmp == NULL_TREE)
3940 error ("cannot initialize `%T' from `%T'", type, TREE_TYPE (init));
3944 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
3947 DECL_INITIAL (decl) = tmp;
3952 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3953 array until we finish parsing the initializer. If that's the
3954 situation we're in, update DECL accordingly. */
3957 maybe_deduce_size_from_array_init (tree decl, tree init)
3959 tree type = TREE_TYPE (decl);
3961 if (TREE_CODE (type) == ARRAY_TYPE
3962 && TYPE_DOMAIN (type) == NULL_TREE
3963 && TREE_CODE (decl) != TYPE_DECL)
3965 /* do_default is really a C-ism to deal with tentative definitions.
3966 But let's leave it here to ease the eventual merge. */
3967 int do_default = !DECL_EXTERNAL (decl);
3968 tree initializer = init ? init : DECL_INITIAL (decl);
3969 int failure = complete_array_type (type, initializer, do_default);
3972 error ("initializer fails to determine size of `%D'", decl);
3977 error ("array size missing in `%D'", decl);
3978 /* If a `static' var's size isn't known, make it extern as
3979 well as static, so it does not get allocated. If it's not
3980 `static', then don't mark it extern; finish_incomplete_decl
3981 will give it a default size and it will get allocated. */
3982 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
3983 DECL_EXTERNAL (decl) = 1;
3986 if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
3987 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
3989 error ("zero-size array `%D'", decl);
3991 layout_decl (decl, 0);
3995 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
3996 any appropriate error messages regarding the layout. */
3999 layout_var_decl (tree decl)
4001 tree type = TREE_TYPE (decl);
4003 tree ttype = target_type (type);
4006 /* If we haven't already layed out this declaration, do so now.
4007 Note that we must not call complete type for an external object
4008 because it's type might involve templates that we are not
4009 supposed to instantiate yet. (And it's perfectly valid to say
4010 `extern X x' for some incomplete type `X'.) */
4011 if (!DECL_EXTERNAL (decl))
4012 complete_type (type);
4013 if (!DECL_SIZE (decl)
4014 && TREE_TYPE (decl) != error_mark_node
4015 && (COMPLETE_TYPE_P (type)
4016 || (TREE_CODE (type) == ARRAY_TYPE
4017 && !TYPE_DOMAIN (type)
4018 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4019 layout_decl (decl, 0);
4021 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4023 /* An automatic variable with an incomplete type: that is an error.
4024 Don't talk about array types here, since we took care of that
4025 message in grokdeclarator. */
4026 error ("storage size of `%D' isn't known", decl);
4027 TREE_TYPE (decl) = error_mark_node;
4030 /* Keep this code around in case we later want to control debug info
4031 based on whether a type is "used". (jason 1999-11-11) */
4033 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4034 /* Let debugger know it should output info for this type. */
4035 note_debug_info_needed (ttype);
4037 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4038 note_debug_info_needed (DECL_CONTEXT (decl));
4041 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4042 && DECL_SIZE (decl) != NULL_TREE
4043 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4045 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4046 constant_expression_warning (DECL_SIZE (decl));
4048 error ("storage size of `%D' isn't constant", decl);
4051 if (TREE_STATIC (decl)
4052 && !DECL_ARTIFICIAL (decl)
4053 && current_function_decl
4054 && DECL_CONTEXT (decl) == current_function_decl)
4055 push_local_name (decl);
4058 /* If a local static variable is declared in an inline function, or if
4059 we have a weak definition, we must endeavor to create only one
4060 instance of the variable at link-time. */
4063 maybe_commonize_var (tree decl)
4065 /* Static data in a function with comdat linkage also has comdat
4067 if (TREE_STATIC (decl)
4068 /* Don't mess with __FUNCTION__. */
4069 && ! DECL_ARTIFICIAL (decl)
4070 && DECL_FUNCTION_SCOPE_P (decl)
4071 /* Unfortunately, import_export_decl has not always been called
4072 before the function is processed, so we cannot simply check
4074 && (DECL_COMDAT (DECL_CONTEXT (decl))
4075 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4076 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4077 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4081 /* With weak symbols, we simply make the variable COMDAT;
4082 that will cause copies in multiple translations units to
4084 comdat_linkage (decl);
4088 if (DECL_INITIAL (decl) == NULL_TREE
4089 || DECL_INITIAL (decl) == error_mark_node)
4091 /* Without weak symbols, we can use COMMON to merge
4092 uninitialized variables. */
4093 TREE_PUBLIC (decl) = 1;
4094 DECL_COMMON (decl) = 1;
4098 /* While for initialized variables, we must use internal
4099 linkage -- which means that multiple copies will not
4101 TREE_PUBLIC (decl) = 0;
4102 DECL_COMMON (decl) = 0;
4103 cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl);
4104 warning ("%J you can work around this by removing the initializer",
4109 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4110 /* Set it up again; we might have set DECL_INITIAL since the last
4112 comdat_linkage (decl);
4115 /* Issue an error message if DECL is an uninitialized const variable. */
4118 check_for_uninitialized_const_var (tree decl)
4120 tree type = TREE_TYPE (decl);
4122 /* ``Unless explicitly declared extern, a const object does not have
4123 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4125 if (TREE_CODE (decl) == VAR_DECL
4126 && TREE_CODE (type) != REFERENCE_TYPE
4127 && CP_TYPE_CONST_P (type)
4128 && !TYPE_NEEDS_CONSTRUCTING (type)
4129 && !DECL_INITIAL (decl))
4130 error ("uninitialized const `%D'", decl);
4133 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4134 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4135 initialized. If there are no more such fields, the return value
4139 next_initializable_field (tree field)
4142 && (TREE_CODE (field) != FIELD_DECL
4143 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4144 || DECL_ARTIFICIAL (field)))
4145 field = TREE_CHAIN (field);
4150 /* Subroutine of reshape_init. Reshape the constructor for an array. INITP
4151 is the pointer to the old constructor list (to the CONSTRUCTOR_ELTS of
4152 the CONSTRUCTOR we are processing), while NEW_INIT is the CONSTRUCTOR we
4154 ELT_TYPE is the element type of the array. MAX_INDEX is an INTEGER_CST
4155 representing the size of the array minus one (the maximum index), or
4156 NULL_TREE if the array was declared without specifying the size. */
4159 reshape_init_array (tree elt_type, tree max_index,
4160 tree *initp, tree new_init)
4162 bool sized_array_p = (max_index != NULL_TREE);
4163 HOST_WIDE_INT max_index_cst = 0;
4164 HOST_WIDE_INT index;
4167 /* HWI is either 32bit or 64bit, so it must be enough to represent the
4169 max_index_cst = tree_low_cst (max_index, 1);
4171 /* Loop until there are no more initializers. */
4173 *initp && (!sized_array_p || index <= max_index_cst);
4177 tree designated_index;
4179 element_init = reshape_init (elt_type, initp);
4180 if (element_init == error_mark_node)
4182 TREE_CHAIN (element_init) = CONSTRUCTOR_ELTS (new_init);
4183 CONSTRUCTOR_ELTS (new_init) = element_init;
4184 designated_index = TREE_PURPOSE (element_init);
4185 if (designated_index)
4187 /* Handle array designated initializers (GNU extension). */
4188 if (TREE_CODE (designated_index) == IDENTIFIER_NODE)
4190 error ("name `%D' used in a GNU-style designated "
4191 "initializer for an array", designated_index);
4192 TREE_PURPOSE (element_init) = NULL_TREE;
4196 gcc_assert (TREE_CODE (designated_index) == INTEGER_CST);
4198 && tree_int_cst_lt (max_index, designated_index))
4200 error ("Designated initializer `%E' larger than array "
4201 "size", designated_index);
4202 TREE_PURPOSE (element_init) = NULL_TREE;
4205 index = tree_low_cst (designated_index, 1);
4213 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4214 brace-enclosed aggregate initializer.
4216 *INITP is one of a list of initializers describing a brace-enclosed
4217 initializer for an entity of the indicated aggregate TYPE. It may
4218 not presently match the shape of the TYPE; for example:
4220 struct S { int a; int b; };
4221 struct S a[] = { 1, 2, 3, 4 };
4223 Here *INITP will point to TREE_LIST of four elements, rather than a
4224 list of two elements, each itself a list of two elements. This
4225 routine transforms INIT from the former form into the latter. The
4226 revised initializer is returned. */
4229 reshape_init (tree type, tree *initp)
4233 tree old_init_value;
4235 bool brace_enclosed_p;
4238 old_init_value = (TREE_CODE (*initp) == TREE_LIST
4239 ? TREE_VALUE (*initp) : old_init);
4241 gcc_assert (old_init_value);
4243 /* If the initializer is brace-enclosed, pull initializers from the
4244 enclosed elements. Advance past the brace-enclosed initializer
4246 if (TREE_CODE (old_init_value) == CONSTRUCTOR
4247 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value))
4249 *initp = TREE_CHAIN (old_init);
4250 TREE_CHAIN (old_init) = NULL_TREE;
4251 inits = CONSTRUCTOR_ELTS (old_init_value);
4253 brace_enclosed_p = true;
4258 brace_enclosed_p = false;
4261 /* A non-aggregate type is always initialized with a single
4263 if (!CP_AGGREGATE_TYPE_P (type))
4265 *initp = TREE_CHAIN (old_init);
4266 TREE_CHAIN (old_init) = NULL_TREE;
4267 /* It is invalid to initialize a non-aggregate type with a
4268 brace-enclosed initializer. */
4269 if (brace_enclosed_p)
4271 error ("brace-enclosed initializer used to initialize `%T'",
4273 if (TREE_CODE (old_init) == TREE_LIST)
4274 TREE_VALUE (old_init) = error_mark_node;
4276 old_init = error_mark_node;
4284 All implicit type conversions (clause _conv_) are considered when
4285 initializing the aggregate member with an initializer from an
4286 initializer-list. If the initializer can initialize a member,
4287 the member is initialized. Otherwise, if the member is itself a
4288 non-empty subaggregate, brace elision is assumed and the
4289 initializer is considered for the initialization of the first
4290 member of the subaggregate. */
4291 if (!brace_enclosed_p
4292 && can_convert_arg (type, TREE_TYPE (old_init_value), old_init_value))
4294 *initp = TREE_CHAIN (old_init);
4295 TREE_CHAIN (old_init) = NULL_TREE;
4299 if (TREE_CODE (old_init_value) == STRING_CST
4300 && TREE_CODE (type) == ARRAY_TYPE
4301 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4303 /* [dcl.init.string]
4305 A char array (whether plain char, signed char, or unsigned char)
4306 can be initialized by a string-literal (optionally enclosed in
4307 braces); a wchar_t array can be initialized by a wide
4308 string-literal (optionally enclosed in braces). */
4309 new_init = old_init;
4310 /* Move past the initializer. */
4311 *initp = TREE_CHAIN (old_init);
4312 TREE_CHAIN (old_init) = NULL_TREE;
4316 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4317 new_init = build_constructor (NULL_TREE, NULL_TREE);
4319 if (CLASS_TYPE_P (type))
4323 field = next_initializable_field (TYPE_FIELDS (type));
4329 An initializer for an aggregate member that is an
4330 empty class shall have the form of an empty
4331 initializer-list {}. */
4332 if (!brace_enclosed_p)
4334 error ("initializer for `%T' must be brace-enclosed",
4336 return error_mark_node;
4341 /* Loop through the initializable fields, gathering
4347 /* Handle designated initializers, as an extension. */
4348 if (TREE_PURPOSE (*initp))
4351 pedwarn ("ISO C++ does not allow designated initializers");
4352 field = lookup_field_1 (type, TREE_PURPOSE (*initp),
4353 /*want_type=*/false);
4354 if (!field || TREE_CODE (field) != FIELD_DECL)
4355 error ("`%T' has no non-static data member named `%D'",
4356 type, TREE_PURPOSE (*initp));
4361 field_init = reshape_init (TREE_TYPE (field), initp);
4362 if (field_init == error_mark_node)
4363 return error_mark_node;
4364 TREE_CHAIN (field_init) = CONSTRUCTOR_ELTS (new_init);
4365 CONSTRUCTOR_ELTS (new_init) = field_init;
4368 When a union is initialized with a brace-enclosed
4369 initializer, the braces shall only contain an
4370 initializer for the first member of the union. */
4371 if (TREE_CODE (type) == UNION_TYPE)
4373 field = next_initializable_field (TREE_CHAIN (field));
4377 else if (TREE_CODE (type) == ARRAY_TYPE
4378 || TREE_CODE (type) == VECTOR_TYPE)
4380 /* If the bound of the array is known, take no more initializers
4381 than are allowed. */
4382 tree max_index = NULL_TREE;
4383 if (TREE_CODE (type) == ARRAY_TYPE)
4385 if (TYPE_DOMAIN (type))
4386 max_index = array_type_nelts (type);
4390 /* For a vector, the representation type is a struct
4391 containing a single member which is an array of the
4392 appropriate size. */
4393 tree rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4394 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4395 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS
4399 if (!reshape_init_array (TREE_TYPE (type), max_index,
4401 return error_mark_node;
4406 /* The initializers were placed in reverse order in the
4408 CONSTRUCTOR_ELTS (new_init) = nreverse (CONSTRUCTOR_ELTS (new_init));
4410 if (TREE_CODE (old_init) == TREE_LIST)
4411 new_init = build_tree_list (TREE_PURPOSE (old_init), new_init);
4414 /* If this was a brace-enclosed initializer and all of the
4415 initializers were not used up, there is a problem. */
4416 if (brace_enclosed_p && *initp)
4417 error ("too many initializers for `%T'", type);
4422 /* Verify INIT (the initializer for DECL), and record the
4423 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4424 grok_reference_init.
4426 If the return value is non-NULL, it is an expression that must be
4427 evaluated dynamically to initialize DECL. */
4430 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4432 tree type = TREE_TYPE (decl);
4433 tree init_code = NULL;
4435 /* If `start_decl' didn't like having an initialization, ignore it now. */
4436 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
4439 /* If an initializer is present, DECL_INITIAL has been
4440 error_mark_node, to indicate that an as-of-yet unevaluated
4441 initialization will occur. From now on, DECL_INITIAL reflects
4442 the static initialization -- if any -- of DECL. */
4443 DECL_INITIAL (decl) = NULL_TREE;
4445 /* Things that are going to be initialized need to have complete
4447 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4449 if (type == error_mark_node)
4450 /* We will have already complained. */
4452 else if (init && COMPLETE_TYPE_P (type)
4453 && !TREE_CONSTANT (TYPE_SIZE (type)))
4455 error ("variable-sized object `%D' may not be initialized", decl);
4458 else if (TREE_CODE (type) == ARRAY_TYPE
4459 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4461 error ("elements of array `%#D' have incomplete type", decl);
4464 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4466 error ("`%D' has incomplete type", decl);
4467 TREE_TYPE (decl) = error_mark_node;
4471 if (TREE_CODE (decl) == CONST_DECL)
4473 gcc_assert (TREE_CODE (decl) != REFERENCE_TYPE);
4475 DECL_INITIAL (decl) = init;
4477 gcc_assert (init != NULL_TREE);
4480 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4481 init = grok_reference_init (decl, type, init, cleanup);
4484 if (TREE_CODE (init) == CONSTRUCTOR
4485 && BRACE_ENCLOSED_INITIALIZER_P (init))
4487 /* [dcl.init] paragraph 13,
4488 If T is a scalar type, then a declaration of the form
4493 reshape_init will complain about the extra braces,
4494 and doesn't do anything useful in the case where TYPE is
4495 scalar, so just don't call it. */
4496 if (CP_AGGREGATE_TYPE_P (type))
4497 init = reshape_init (type, &init);
4499 if ((*targetm.vector_opaque_p) (type))
4501 error ("opaque vector types cannot be initialized");
4502 init = error_mark_node;
4506 /* If DECL has an array type without a specific bound, deduce the
4507 array size from the initializer. */
4508 maybe_deduce_size_from_array_init (decl, init);
4509 type = TREE_TYPE (decl);
4511 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4513 if (TREE_CODE (type) == ARRAY_TYPE)
4514 goto initialize_aggr;
4515 else if (TREE_CODE (init) == CONSTRUCTOR
4516 && BRACE_ENCLOSED_INITIALIZER_P (init))
4518 if (TYPE_NON_AGGREGATE_CLASS (type))
4520 error ("`%D' must be initialized by constructor, not by `{...}'",
4522 init = error_mark_node;
4525 goto dont_use_constructor;
4529 int saved_stmts_are_full_exprs_p;
4532 saved_stmts_are_full_exprs_p = 0;
4533 if (building_stmt_tree ())
4535 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4536 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4538 init = build_aggr_init (decl, init, flags);
4539 if (building_stmt_tree ())
4540 current_stmt_tree ()->stmts_are_full_exprs_p =
4541 saved_stmts_are_full_exprs_p;
4547 dont_use_constructor:
4548 if (TREE_CODE (init) != TREE_VEC)
4550 init_code = store_init_value (decl, init);
4555 else if (DECL_EXTERNAL (decl))
4557 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4558 goto initialize_aggr;
4559 else if (IS_AGGR_TYPE (type))
4561 tree core_type = strip_array_types (type);
4563 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4564 error ("structure `%D' with uninitialized const members", decl);
4565 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4566 error ("structure `%D' with uninitialized reference members",
4569 check_for_uninitialized_const_var (decl);
4572 check_for_uninitialized_const_var (decl);
4574 if (init && init != error_mark_node)
4575 init_code = build2 (INIT_EXPR, type, decl, init);
4580 /* If DECL is not a local variable, give it RTL. */
4583 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4585 int toplev = toplevel_bindings_p ();
4588 /* Set the DECL_ASSEMBLER_NAME for the object. */
4591 /* The `register' keyword, when used together with an
4592 asm-specification, indicates that the variable should be
4593 placed in a particular register. */
4594 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4596 change_decl_assembler_name (decl, get_identifier (asmspec));
4597 DECL_HARD_REGISTER (decl) = 1;
4600 set_user_assembler_name (decl, asmspec);
4603 /* Handle non-variables up front. */
4604 if (TREE_CODE (decl) != VAR_DECL)
4606 rest_of_decl_compilation (decl, toplev, at_eof);
4610 /* If we see a class member here, it should be a static data
4612 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4614 gcc_assert (TREE_STATIC (decl));
4615 /* An in-class declaration of a static data member should be
4616 external; it is only a declaration, and not a definition. */
4617 if (init == NULL_TREE)
4618 gcc_assert (DECL_EXTERNAL (decl));
4621 /* We don't create any RTL for local variables. */
4622 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4625 /* We defer emission of local statics until the corresponding
4626 DECL_EXPR is expanded. */
4627 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4629 /* We try to defer namespace-scope static constants so that they are
4630 not emitted into the object file unnecessarily. */
4631 if (!DECL_VIRTUAL_P (decl)
4632 && TREE_READONLY (decl)
4633 && DECL_INITIAL (decl) != NULL_TREE
4634 && DECL_INITIAL (decl) != error_mark_node
4635 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4637 && !TREE_PUBLIC (decl))
4639 /* Fool with the linkage of static consts according to #pragma
4641 struct c_fileinfo *finfo = get_fileinfo (lbasename (input_filename));
4642 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
4644 TREE_PUBLIC (decl) = 1;
4645 DECL_EXTERNAL (decl) = finfo->interface_only;
4650 /* Likewise for template instantiations. */
4651 else if (DECL_LANG_SPECIFIC (decl)
4652 && DECL_IMPLICIT_INSTANTIATION (decl))
4655 /* If we're not deferring, go ahead and assemble the variable. */
4657 rest_of_decl_compilation (decl, toplev, at_eof);
4660 /* Generate code to initialize DECL (a local variable). */
4663 initialize_local_var (tree decl, tree init)
4665 tree type = TREE_TYPE (decl);
4668 gcc_assert (TREE_CODE (decl) == VAR_DECL
4669 || TREE_CODE (decl) == RESULT_DECL);
4670 gcc_assert (!TREE_STATIC (decl));
4672 if (DECL_SIZE (decl) == NULL_TREE)
4674 /* If we used it already as memory, it must stay in memory. */
4675 DECL_INITIAL (decl) = NULL_TREE;
4676 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4679 if (DECL_SIZE (decl) && type != error_mark_node)
4683 /* Compute and store the initial value. */
4684 already_used = TREE_USED (decl) || TREE_USED (type);
4686 /* Perform the initialization. */
4689 int saved_stmts_are_full_exprs_p;
4691 gcc_assert (building_stmt_tree ());
4692 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4693 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4694 finish_expr_stmt (init);
4695 current_stmt_tree ()->stmts_are_full_exprs_p =
4696 saved_stmts_are_full_exprs_p;
4699 /* Set this to 0 so we can tell whether an aggregate which was
4700 initialized was ever used. Don't do this if it has a
4701 destructor, so we don't complain about the 'resource
4702 allocation is initialization' idiom. Now set
4703 attribute((unused)) on types so decls of that type will be
4704 marked used. (see TREE_USED, above.) */
4705 if (TYPE_NEEDS_CONSTRUCTING (type)
4707 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4708 && DECL_NAME (decl))
4709 TREE_USED (decl) = 0;
4710 else if (already_used)
4711 TREE_USED (decl) = 1;
4714 /* Generate a cleanup, if necessary. */
4715 cleanup = cxx_maybe_build_cleanup (decl);
4716 if (DECL_SIZE (decl) && cleanup)
4717 finish_decl_cleanup (decl, cleanup);
4720 /* DECL is a VAR_DECL for a compiler-generated variable with static
4721 storage duration (like a virtual table) whose initializer is a
4722 compile-time constant. Initialize the variable and provide it to
4726 initialize_artificial_var (tree decl, tree init)
4728 DECL_INITIAL (decl) = build_constructor (NULL_TREE, init);
4729 DECL_INITIALIZED_P (decl) = 1;
4730 determine_visibility (decl);
4731 layout_var_decl (decl);
4732 maybe_commonize_var (decl);
4733 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
4736 /* Finish processing of a declaration;
4737 install its line number and initial value.
4738 If the length of an array type is not known before,
4739 it must be determined now, from the initial value, or it is an error.
4741 INIT holds the value of an initializer that should be allowed to escape
4744 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4745 if the (init) syntax was used. */
4748 cp_finish_decl (tree decl, tree init, tree asmspec_tree, int flags)
4751 tree ttype = NULL_TREE;
4753 const char *asmspec = NULL;
4754 int was_readonly = 0;
4756 if (decl == error_mark_node)
4761 error ("assignment (not initialization) in declaration");
4765 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
4767 /* Assume no cleanup is required. */
4768 cleanup = NULL_TREE;
4770 /* If a name was specified, get the string. */
4771 if (global_scope_p (current_binding_level))
4772 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
4774 asmspec = TREE_STRING_POINTER (asmspec_tree);
4776 if (init && TREE_CODE (init) == NAMESPACE_DECL)
4778 error ("cannot initialize `%D' to namespace `%D'",
4783 if (current_class_type
4784 && CP_DECL_CONTEXT (decl) == current_class_type
4785 && TYPE_BEING_DEFINED (current_class_type)
4786 && (DECL_INITIAL (decl) || init))
4787 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
4789 type = TREE_TYPE (decl);
4791 if (type == error_mark_node)
4794 if (TYPE_HAS_MUTABLE_P (type))
4795 TREE_READONLY (decl) = 0;
4797 if (processing_template_decl)
4799 /* Add this declaration to the statement-tree. */
4800 if (at_function_scope_p ())
4801 add_decl_expr (decl);
4803 if (init && DECL_INITIAL (decl))
4804 DECL_INITIAL (decl) = init;
4805 if (TREE_CODE (decl) == VAR_DECL
4806 && !DECL_PRETTY_FUNCTION_P (decl)
4807 && !dependent_type_p (TREE_TYPE (decl)))
4808 maybe_deduce_size_from_array_init (decl, init);
4812 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4813 gcc_assert (TREE_CODE (decl) != PARM_DECL);
4815 /* Take care of TYPE_DECLs up front. */
4816 if (TREE_CODE (decl) == TYPE_DECL)
4818 if (type != error_mark_node
4819 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
4821 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
4822 warning ("shadowing previous type declaration of `%#D'", decl);
4823 set_identifier_type_value (DECL_NAME (decl), decl);
4826 /* If we have installed this as the canonical typedef for this
4827 type, and that type has not been defined yet, delay emitting
4828 the debug information for it, as we will emit it later. */
4829 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
4830 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
4831 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
4833 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
4838 if (TREE_CODE (decl) != FUNCTION_DECL)
4839 ttype = target_type (type);
4842 /* Currently, GNU C++ puts constants in text space, making them
4843 impossible to initialize. In the future, one would hope for
4844 an operating system which understood the difference between
4845 initialization and the running of a program. */
4846 if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl))
4849 if (TYPE_NEEDS_CONSTRUCTING (type)
4850 || TREE_CODE (type) == REFERENCE_TYPE)
4851 TREE_READONLY (decl) = 0;
4854 if (TREE_CODE (decl) == VAR_DECL)
4856 /* Only PODs can have thread-local storage. Other types may require
4857 various kinds of non-trivial initialization. */
4858 if (DECL_THREAD_LOCAL (decl) && !pod_type_p (TREE_TYPE (decl)))
4859 error ("`%D' cannot be thread-local because it has non-POD type `%T'",
4860 decl, TREE_TYPE (decl));
4861 /* Convert the initializer to the type of DECL, if we have not
4862 already initialized DECL. */
4863 if (!DECL_INITIALIZED_P (decl)
4864 /* If !DECL_EXTERNAL then DECL is being defined. In the
4865 case of a static data member initialized inside the
4866 class-specifier, there can be an initializer even if DECL
4867 is *not* defined. */
4868 && (!DECL_EXTERNAL (decl) || init))
4870 init = check_initializer (decl, init, flags, &cleanup);
4871 /* Thread-local storage cannot be dynamically initialized. */
4872 if (DECL_THREAD_LOCAL (decl) && init)
4874 error ("`%D' is thread-local and so cannot be dynamically "
4875 "initialized", decl);
4882 The memory occupied by any object of static storage
4883 duration is zero-initialized at program startup before
4884 any other initialization takes place.
4886 We cannot create an appropriate initializer until after
4887 the type of DECL is finalized. If DECL_INITIAL is set,
4888 then the DECL is statically initialized, and any
4889 necessary zero-initialization has already been performed. */
4890 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
4891 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
4892 /*nelts=*/NULL_TREE,
4893 /*static_storage_p=*/true);
4894 /* Remember that the initialization for this variable has
4896 DECL_INITIALIZED_P (decl) = 1;
4897 /* The variable is being defined, so determine its
4899 determine_visibility (decl);
4901 /* If the variable has an array type, lay out the type, even if
4902 there is no initializer. It is valid to index through the
4903 array, and we must get TYPE_ALIGN set correctly on the array
4905 else if (TREE_CODE (type) == ARRAY_TYPE)
4909 /* Add this declaration to the statement-tree. This needs to happen
4910 after the call to check_initializer so that the DECL_EXPR for a
4911 reference temp is added before the DECL_EXPR for the reference itself. */
4912 if (at_function_scope_p ())
4913 add_decl_expr (decl);
4915 if (TREE_CODE (decl) == VAR_DECL)
4916 layout_var_decl (decl);
4918 /* Output the assembler code and/or RTL code for variables and functions,
4919 unless the type is an undefined structure or union.
4920 If not, it will get done when the type is completed. */
4921 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL)
4923 if (TREE_CODE (decl) == VAR_DECL)
4924 maybe_commonize_var (decl);
4926 make_rtl_for_nonlocal_decl (decl, init, asmspec);
4928 /* Check for abstractness of the type. Notice that there is no
4929 need to strip array types here since the check for those types
4930 is already done within create_array_type_for_decl. */
4931 if (TREE_CODE (type) == FUNCTION_TYPE
4932 || TREE_CODE (type) == METHOD_TYPE)
4933 abstract_virtuals_error (decl, TREE_TYPE (type));
4935 abstract_virtuals_error (decl, type);
4937 if (TREE_CODE (decl) == FUNCTION_DECL
4938 || TREE_TYPE (decl) == error_mark_node)
4939 /* No initialization required. */
4941 else if (DECL_EXTERNAL (decl)
4942 && ! (DECL_LANG_SPECIFIC (decl)
4943 && DECL_NOT_REALLY_EXTERN (decl)))
4946 DECL_INITIAL (decl) = init;
4950 /* A variable definition. */
4951 if (DECL_FUNCTION_SCOPE_P (decl))
4953 /* Initialize the local variable. */
4954 if (processing_template_decl)
4956 if (init || DECL_INITIAL (decl) == error_mark_node)
4957 DECL_INITIAL (decl) = init;
4959 else if (!TREE_STATIC (decl))
4960 initialize_local_var (decl, init);
4963 if (TREE_STATIC (decl))
4964 expand_static_init (decl, init);
4968 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
4969 reference, insert it in the statement-tree now. */
4971 push_cleanup (decl, cleanup, false);
4976 TREE_READONLY (decl) = 1;
4978 /* If this was marked 'used', be sure it will be output. */
4979 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
4980 mark_decl_referenced (decl);
4983 /* This is here for a midend callback from c-common.c. */
4986 finish_decl (tree decl, tree init, tree asmspec_tree)
4988 cp_finish_decl (decl, init, asmspec_tree, 0);
4991 /* Returns a declaration for a VAR_DECL as if:
4993 extern "C" TYPE NAME;
4995 had been seen. Used to create compiler-generated global
4999 declare_global_var (tree name, tree type)
5003 push_to_top_level ();
5004 decl = build_decl (VAR_DECL, name, type);
5005 TREE_PUBLIC (decl) = 1;
5006 DECL_EXTERNAL (decl) = 1;
5007 DECL_ARTIFICIAL (decl) = 1;
5009 cp_finish_decl (decl, NULL_TREE, NULL_TREE, 0);
5010 pop_from_top_level ();
5015 /* Returns a pointer to the `atexit' function. Note that if
5016 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5017 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5020 get_atexit_node (void)
5031 if (flag_use_cxa_atexit)
5033 /* The declaration for `__cxa_atexit' is:
5035 int __cxa_atexit (void (*)(void *), void *, void *)
5037 We build up the argument types and then then function type
5040 /* First, build the pointer-to-function type for the first
5042 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5043 fn_type = build_function_type (void_type_node, arg_types);
5044 fn_ptr_type = build_pointer_type (fn_type);
5045 /* Then, build the rest of the argument types. */
5046 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5047 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5048 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5049 /* And the final __cxa_atexit type. */
5050 fn_type = build_function_type (integer_type_node, arg_types);
5051 fn_ptr_type = build_pointer_type (fn_type);
5052 name = "__cxa_atexit";
5056 /* The declaration for `atexit' is:
5058 int atexit (void (*)());
5060 We build up the argument types and then then function type
5062 fn_type = build_function_type (void_type_node, void_list_node);
5063 fn_ptr_type = build_pointer_type (fn_type);
5064 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5065 /* Build the final atexit type. */
5066 fn_type = build_function_type (integer_type_node, arg_types);
5070 /* Now, build the function declaration. */
5071 push_lang_context (lang_name_c);
5072 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5073 mark_used (atexit_fndecl);
5074 pop_lang_context ();
5075 atexit_node = decay_conversion (atexit_fndecl);
5080 /* Returns the __dso_handle VAR_DECL. */
5083 get_dso_handle_node (void)
5085 if (dso_handle_node)
5086 return dso_handle_node;
5088 /* Declare the variable. */
5089 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5092 return dso_handle_node;
5095 /* Begin a new function with internal linkage whose job will be simply
5096 to destroy some particular variable. */
5098 static GTY(()) int start_cleanup_cnt;
5101 start_cleanup_fn (void)
5108 push_to_top_level ();
5110 /* No need to mangle this. */
5111 push_lang_context (lang_name_c);
5113 /* Build the parameter-types. */
5114 parmtypes = void_list_node;
5115 /* Functions passed to __cxa_atexit take an additional parameter.
5116 We'll just ignore it. After we implement the new calling
5117 convention for destructors, we can eliminate the use of
5118 additional cleanup functions entirely in the -fnew-abi case. */
5119 if (flag_use_cxa_atexit)
5120 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5121 /* Build the function type itself. */
5122 fntype = build_function_type (void_type_node, parmtypes);
5123 /* Build the name of the function. */
5124 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5125 /* Build the function declaration. */
5126 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5127 /* It's a function with internal linkage, generated by the
5129 TREE_PUBLIC (fndecl) = 0;
5130 DECL_ARTIFICIAL (fndecl) = 1;
5131 /* Make the function `inline' so that it is only emitted if it is
5132 actually needed. It is unlikely that it will be inlined, since
5133 it is only called via a function pointer, but we avoid unnecessary
5134 emissions this way. */
5135 DECL_INLINE (fndecl) = 1;
5136 DECL_DECLARED_INLINE_P (fndecl) = 1;
5137 DECL_INTERFACE_KNOWN (fndecl) = 1;
5138 /* Build the parameter. */
5139 if (flag_use_cxa_atexit)
5143 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5144 DECL_CONTEXT (parmdecl) = fndecl;
5145 TREE_USED (parmdecl) = 1;
5146 DECL_ARGUMENTS (fndecl) = parmdecl;
5150 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5152 pop_lang_context ();
5154 return current_function_decl;
5157 /* Finish the cleanup function begun by start_cleanup_fn. */
5160 end_cleanup_fn (void)
5162 expand_or_defer_fn (finish_function (0));
5164 pop_from_top_level ();
5167 /* Generate code to handle the destruction of DECL, an object with
5168 static storage duration. */
5171 register_dtor_fn (tree decl)
5178 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5179 return void_zero_node;
5181 /* Call build_cleanup before we enter the anonymous function so that
5182 any access checks will be done relative to the current scope,
5183 rather than the scope of the anonymous function. */
5184 build_cleanup (decl);
5186 /* Now start the function. */
5187 cleanup = start_cleanup_fn ();
5189 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5190 to the original function, rather than the anonymous one. That
5191 will make the back-end think that nested functions are in use,
5192 which causes confusion. */
5194 push_deferring_access_checks (dk_no_check);
5195 fcall = build_cleanup (decl);
5196 pop_deferring_access_checks ();
5198 /* Create the body of the anonymous function. */
5199 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5200 finish_expr_stmt (fcall);
5201 finish_compound_stmt (compound_stmt);
5204 /* Call atexit with the cleanup function. */
5205 cxx_mark_addressable (cleanup);
5206 mark_used (cleanup);
5207 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5208 if (flag_use_cxa_atexit)
5210 args = tree_cons (NULL_TREE,
5211 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5213 args = tree_cons (NULL_TREE, null_pointer_node, args);
5214 args = tree_cons (NULL_TREE, cleanup, args);
5217 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5218 return build_function_call (get_atexit_node (), args);
5221 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5222 is its initializer. Generate code to handle the construction
5223 and destruction of DECL. */
5226 expand_static_init (tree decl, tree init)
5228 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5229 gcc_assert (TREE_STATIC (decl));
5231 /* Some variables require no initialization. */
5233 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5234 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5237 if (DECL_FUNCTION_SCOPE_P (decl))
5239 /* Emit code to perform this initialization but once. */
5240 tree if_stmt, inner_if_stmt = NULL_TREE;
5241 tree then_clause, inner_then_clause = NULL_TREE;
5242 tree guard, guard_addr, guard_addr_list;
5243 tree acquire_fn, release_fn, abort_fn;
5246 /* Emit code to perform this initialization but once. This code
5249 static <type> guard;
5250 if (!guard.first_byte) {
5251 if (__cxa_guard_acquire (&guard)) {
5254 // Do initialization.
5255 flag = true; __cxa_guard_release (&guard);
5256 // Register variable for destruction at end of program.
5258 if (!flag) __cxa_guard_abort (&guard);
5262 Note that the `flag' variable is only set to 1 *after* the
5263 initialization is complete. This ensures that an exception,
5264 thrown during the construction, will cause the variable to
5265 reinitialized when we pass through this code again, as per:
5269 If the initialization exits by throwing an exception, the
5270 initialization is not complete, so it will be tried again
5271 the next time control enters the declaration.
5273 This process should be thread-safe, too; multiple threads
5274 should not be able to initialize the variable more than
5277 /* Create the guard variable. */
5278 guard = get_guard (decl);
5280 /* Begin the conditional initialization. */
5281 if_stmt = begin_if_stmt ();
5282 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5283 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5285 if (flag_threadsafe_statics)
5287 guard_addr = build_address (guard);
5288 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5290 acquire_fn = get_identifier ("__cxa_guard_acquire");
5291 release_fn = get_identifier ("__cxa_guard_release");
5292 abort_fn = get_identifier ("__cxa_guard_abort");
5293 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5295 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5297 tree vfntype = build_function_type (void_type_node, argtypes);
5298 acquire_fn = push_library_fn
5299 (acquire_fn, build_function_type (integer_type_node, argtypes));
5300 release_fn = push_library_fn (release_fn, vfntype);
5301 abort_fn = push_library_fn (abort_fn, vfntype);
5305 release_fn = identifier_global_value (release_fn);
5306 abort_fn = identifier_global_value (abort_fn);
5309 inner_if_stmt = begin_if_stmt ();
5310 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5313 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5314 begin = get_target_expr (boolean_false_node);
5315 flag = TARGET_EXPR_SLOT (begin);
5317 TARGET_EXPR_CLEANUP (begin)
5318 = build (COND_EXPR, void_type_node, flag,
5320 build_call (abort_fn, guard_addr_list));
5321 CLEANUP_EH_ONLY (begin) = 1;
5323 /* Do the initialization itself. */
5324 init = add_stmt_to_compound (begin, init);
5325 init = add_stmt_to_compound
5326 (init, build (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5327 init = add_stmt_to_compound
5328 (init, build_call (release_fn, guard_addr_list));
5331 init = add_stmt_to_compound (init, set_guard (guard));
5333 /* Use atexit to register a function for destroying this static
5335 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5337 finish_expr_stmt (init);
5339 if (flag_threadsafe_statics)
5341 finish_compound_stmt (inner_then_clause);
5342 finish_then_clause (inner_if_stmt);
5343 finish_if_stmt (inner_if_stmt);
5346 finish_compound_stmt (then_clause);
5347 finish_then_clause (if_stmt);
5348 finish_if_stmt (if_stmt);
5351 static_aggregates = tree_cons (init, decl, static_aggregates);
5355 /* Make TYPE a complete type based on INITIAL_VALUE.
5356 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5357 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5360 complete_array_type (tree type, tree initial_value, int do_default)
5362 tree maxindex = NULL_TREE;
5367 /* An array of character type can be initialized from a
5368 brace-enclosed string constant. */
5369 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
5370 && TREE_CODE (initial_value) == CONSTRUCTOR
5371 && CONSTRUCTOR_ELTS (initial_value)
5372 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value)))
5374 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value)) == NULL_TREE)
5375 initial_value = TREE_VALUE (CONSTRUCTOR_ELTS (initial_value));
5377 /* Note MAXINDEX is really the maximum index, one less than the
5379 if (TREE_CODE (initial_value) == STRING_CST)
5382 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
5383 maxindex = build_int_cst (NULL_TREE,
5384 (TREE_STRING_LENGTH (initial_value)
5387 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
5389 tree elts = CONSTRUCTOR_ELTS (initial_value);
5391 maxindex = ssize_int (-1);
5392 for (; elts; elts = TREE_CHAIN (elts))
5394 if (TREE_PURPOSE (elts))
5395 maxindex = TREE_PURPOSE (elts);
5397 maxindex = size_binop (PLUS_EXPR, maxindex, ssize_int (1));
5402 /* Make an error message unless that happened already. */
5403 if (initial_value != error_mark_node)
5406 initial_value = NULL_TREE;
5408 /* Prevent further error messages. */
5409 maxindex = build_int_cst (NULL_TREE, 0);
5416 maxindex = build_int_cst (NULL_TREE, 0);
5426 domain = build_index_type (maxindex);
5427 TYPE_DOMAIN (type) = domain;
5430 itype = TREE_TYPE (initial_value);
5433 if (itype && !TYPE_DOMAIN (itype))
5434 TYPE_DOMAIN (itype) = domain;
5435 /* The type of the main variant should never be used for arrays
5436 of different sizes. It should only ever be completed with the
5437 size of the array. */
5438 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
5439 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
5441 elt_type = TREE_TYPE (type);
5442 TYPE_NEEDS_CONSTRUCTING (type)
5443 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type));
5444 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5445 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type));
5448 /* Lay out the type now that we can get the real answer. */
5455 /* Return zero if something is declared to be a member of type
5456 CTYPE when in the context of CUR_TYPE. STRING is the error
5457 message to print in that case. Otherwise, quietly return 1. */
5460 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5462 if (ctype && ctype != cur_type)
5464 if (flags == DTOR_FLAG)
5465 error ("destructor for alien class `%T' cannot be a member",
5468 error ("constructor for alien class `%T' cannot be a member",
5475 /* Subroutine of `grokdeclarator'. */
5477 /* Generate errors possibly applicable for a given set of specifiers.
5478 This is for ARM $7.1.2. */
5481 bad_specifiers (tree object,
5490 error ("`%D' declared as a `virtual' %s", object, type);
5492 error ("`%D' declared as an `inline' %s", object, type);
5494 error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
5497 cp_error_at ("`%D' declared as a friend", object);
5499 && (TREE_CODE (object) == TYPE_DECL
5500 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5501 && !TYPE_REFFN_P (TREE_TYPE (object))
5502 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5503 cp_error_at ("`%D' declared with an exception specification", object);
5506 /* CTYPE is class type, or null if non-class.
5507 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5509 DECLARATOR is the function's name.
5510 PARMS is a chain of PARM_DECLs for the function.
5511 VIRTUALP is truthvalue of whether the function is virtual or not.
5512 FLAGS are to be passed through to `grokclassfn'.
5513 QUALS are qualifiers indicating whether the function is `const'
5515 RAISES is a list of exceptions that this function can raise.
5516 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5517 not look, and -1 if we should not call `grokclassfn' at all.
5519 Returns `NULL_TREE' if something goes wrong, after issuing
5520 applicable error messages. */
5523 grokfndecl (tree ctype,
5527 tree orig_declarator,
5529 enum overload_flags flags,
5542 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5543 int has_default_arg = 0;
5547 type = build_exception_variant (type, raises);
5549 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5550 DECL_ARGUMENTS (decl) = parms;
5551 /* Propagate volatile out from type to decl. */
5552 if (TYPE_VOLATILE (type))
5553 TREE_THIS_VOLATILE (decl) = 1;
5555 /* If this decl has namespace scope, set that up. */
5557 set_decl_namespace (decl, in_namespace, friendp);
5559 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5561 /* `main' and builtins have implicit 'C' linkage. */
5562 if ((MAIN_NAME_P (declarator)
5563 || (IDENTIFIER_LENGTH (declarator) > 10
5564 && IDENTIFIER_POINTER (declarator)[0] == '_'
5565 && IDENTIFIER_POINTER (declarator)[1] == '_'
5566 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5567 && current_lang_name == lang_name_cplusplus
5568 && ctype == NULL_TREE
5569 /* NULL_TREE means global namespace. */
5570 && DECL_CONTEXT (decl) == NULL_TREE)
5571 SET_DECL_LANGUAGE (decl, lang_c);
5573 /* Should probably propagate const out from type to decl I bet (mrs). */
5576 DECL_STATIC_FUNCTION_P (decl) = 1;
5577 DECL_CONTEXT (decl) = ctype;
5581 DECL_CONTEXT (decl) = ctype;
5583 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
5585 if (processing_template_decl)
5586 error ("cannot declare `::main' to be a template");
5588 error ("cannot declare `::main' to be inline");
5590 error ("cannot declare `::main' to be static");
5591 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
5594 error ("`::main' must return `int'");
5595 TREE_TYPE (TREE_TYPE (decl)) = integer_type_node;
5601 /* Members of anonymous types and local classes have no linkage; make
5602 them internal. If a typedef is made later, this will be changed. */
5603 if (ctype && (TYPE_ANONYMOUS_P (ctype)
5604 || decl_function_context (TYPE_MAIN_DECL (ctype))))
5609 /* [basic.link]: A name with no linkage (notably, the name of a class
5610 or enumeration declared in a local scope) shall not be used to
5611 declare an entity with linkage.
5613 Only check this for public decls for now. See core 319, 389. */
5614 t = no_linkage_check (TREE_TYPE (decl),
5615 /*relaxed_p=*/false);
5618 if (TYPE_ANONYMOUS_P (t))
5620 if (DECL_EXTERN_C_P (decl))
5621 /* Allow this; it's pretty common in C. */;
5624 pedwarn ("non-local function `%#D' uses anonymous type",
5626 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5628 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5633 pedwarn ("non-local function `%#D' uses local type `%T'",
5638 TREE_PUBLIC (decl) = publicp;
5641 DECL_INTERFACE_KNOWN (decl) = 1;
5642 DECL_NOT_REALLY_EXTERN (decl) = 1;
5645 /* If the declaration was declared inline, mark it as such. */
5647 DECL_DECLARED_INLINE_P (decl) = 1;
5648 /* We inline functions that are explicitly declared inline, or, when
5649 the user explicitly asks us to, all functions. */
5650 if (DECL_DECLARED_INLINE_P (decl)
5651 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
5652 DECL_INLINE (decl) = 1;
5654 DECL_EXTERNAL (decl) = 1;
5655 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
5657 error ("%smember function `%D' cannot have cv-qualifier",
5658 (ctype ? "static " : "non-"), decl);
5659 quals = TYPE_UNQUALIFIED;
5662 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
5663 grok_op_properties (decl, friendp, /*complain=*/true);
5665 if (ctype && decl_function_context (decl))
5666 DECL_NO_STATIC_CHAIN (decl) = 1;
5668 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5669 if (TREE_PURPOSE (t)
5670 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5672 has_default_arg = 1;
5677 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5681 ("defining explicit specialization `%D' in friend declaration",
5685 tree fns = TREE_OPERAND (orig_declarator, 0);
5686 tree args = TREE_OPERAND (orig_declarator, 1);
5688 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5690 /* Something like `template <class T> friend void f<T>()'. */
5691 error ("invalid use of template-id `%D' in declaration of primary template",
5697 /* A friend declaration of the form friend void f<>(). Record
5698 the information in the TEMPLATE_ID_EXPR. */
5699 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5701 if (TREE_CODE (fns) == COMPONENT_REF)
5703 /* Due to bison parser ickiness, we will have already looked
5704 up an operator_name or PFUNCNAME within the current class
5705 (see template_id in parse.y). If the current class contains
5706 such a name, we'll get a COMPONENT_REF here. Undo that. */
5708 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5709 == current_class_type);
5710 fns = TREE_OPERAND (fns, 1);
5712 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5713 || TREE_CODE (fns) == OVERLOAD);
5714 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5716 if (has_default_arg)
5718 error ("default arguments are not allowed in declaration of friend template specialization `%D'",
5725 error ("`inline' is not allowed in declaration of friend template specialization `%D'",
5733 /* Make the init_value nonzero so pushdecl knows this is not
5734 tentative. error_mark_node is replaced later with the BLOCK. */
5735 DECL_INITIAL (decl) = error_mark_node;
5737 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
5738 TREE_NOTHROW (decl) = 1;
5740 /* Caller will do the rest of this. */
5744 if (flags == NO_SPECIAL && ctype && constructor_name_p (declarator, ctype))
5745 DECL_CONSTRUCTOR_P (decl) = 1;
5747 /* Function gets the ugly name, field gets the nice one. This call
5748 may change the type of the function (because of default
5750 if (ctype != NULL_TREE)
5751 grokclassfn (ctype, decl, flags, quals);
5753 decl = check_explicit_specialization (orig_declarator, decl,
5755 2 * (funcdef_flag != 0) +
5756 4 * (friendp != 0));
5757 if (decl == error_mark_node)
5762 cplus_decl_attributes (&decl, *attrlist, 0);
5763 *attrlist = NULL_TREE;
5766 if (ctype != NULL_TREE
5767 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
5772 old_decl = check_classfn (ctype, decl,
5773 (processing_template_decl
5774 > template_class_depth (ctype))
5775 ? current_template_parms
5778 if (old_decl && TREE_CODE (old_decl) == TEMPLATE_DECL)
5779 /* Because grokfndecl is always supposed to return a
5780 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5781 here. We depend on our callers to figure out that its
5782 really a template that's being returned. */
5783 old_decl = DECL_TEMPLATE_RESULT (old_decl);
5785 if (old_decl && DECL_STATIC_FUNCTION_P (old_decl)
5786 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
5787 /* Remove the `this' parm added by grokclassfn.
5788 XXX Isn't this done in start_function, too? */
5789 revert_static_member_fn (decl);
5790 if (old_decl && DECL_ARTIFICIAL (old_decl))
5791 error ("definition of implicitly-declared `%D'", old_decl);
5798 /* Since we've smashed OLD_DECL to its
5799 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5800 if (TREE_CODE (decl) == TEMPLATE_DECL)
5801 decl = DECL_TEMPLATE_RESULT (decl);
5803 /* Attempt to merge the declarations. This can fail, in
5804 the case of some invalid specialization declarations. */
5805 pop_p = push_scope (ctype);
5806 ok = duplicate_decls (decl, old_decl);
5811 error ("no `%#D' member function declared in class `%T'",
5819 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
5822 if (ctype == NULL_TREE || check)
5826 DECL_VIRTUAL_P (decl) = 1;
5831 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
5832 the linkage that DECL will receive in the object file. */
5835 set_linkage_for_static_data_member (tree decl)
5837 /* A static data member always has static storage duration and
5838 external linkage. Note that static data members are forbidden in
5839 local classes -- the only situation in which a class has
5840 non-external linkage. */
5841 TREE_PUBLIC (decl) = 1;
5842 TREE_STATIC (decl) = 1;
5843 /* For non-template classes, static data members are always put
5844 out in exactly those files where they are defined, just as
5845 with ordinary namespace-scope variables. */
5846 if (!processing_template_decl)
5847 DECL_INTERFACE_KNOWN (decl) = 1;
5850 /* Create a VAR_DECL named NAME with the indicated TYPE.
5852 If SCOPE is non-NULL, it is the class type or namespace containing
5853 the variable. If SCOPE is NULL, the variable should is created in
5854 the innermost enclosings scope. */
5857 grokvardecl (tree type,
5859 const cp_decl_specifier_seq *declspecs,
5866 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
5868 /* Compute the scope in which to place the variable. */
5871 /* An explicit "extern" specifier indicates a namespace-scope
5873 if (declspecs->storage_class == sc_extern)
5874 scope = current_namespace;
5875 else if (!at_function_scope_p ())
5877 scope = current_scope ();
5879 scope = current_namespace;
5884 && (/* If the variable is a namespace-scope variable declared in a
5885 template, we need DECL_LANG_SPECIFIC. */
5886 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
5887 /* Similarly for namespace-scope variables with language linkage
5889 || (TREE_CODE (scope) == NAMESPACE_DECL
5890 && current_lang_name != lang_name_cplusplus)
5891 /* Similarly for static data members. */
5893 decl = build_lang_decl (VAR_DECL, name, type);
5895 decl = build_decl (VAR_DECL, name, type);
5897 if (scope && TREE_CODE (scope) == NAMESPACE_DECL)
5898 set_decl_namespace (decl, scope, 0);
5900 DECL_CONTEXT (decl) = scope;
5902 if (declspecs->storage_class == sc_extern)
5904 DECL_THIS_EXTERN (decl) = 1;
5905 DECL_EXTERNAL (decl) = !initialized;
5908 if (DECL_CLASS_SCOPE_P (decl))
5910 set_linkage_for_static_data_member (decl);
5911 /* This function is only called with out-of-class definitions. */
5912 DECL_EXTERNAL (decl) = 0;
5914 /* At top level, either `static' or no s.c. makes a definition
5915 (perhaps tentative), and absence of `static' makes it public. */
5916 else if (toplevel_bindings_p ())
5918 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
5919 && (DECL_THIS_EXTERN (decl) || ! constp));
5920 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
5922 /* Not at top level, only `static' makes a static definition. */
5925 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
5926 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
5929 if (declspecs->specs[(int)ds_thread])
5931 if (targetm.have_tls)
5932 DECL_THREAD_LOCAL (decl) = 1;
5934 /* A mere warning is sure to result in improper semantics
5935 at runtime. Don't bother to allow this to compile. */
5936 error ("thread-local storage not supported for this target");
5939 if (TREE_PUBLIC (decl))
5941 /* [basic.link]: A name with no linkage (notably, the name of a class
5942 or enumeration declared in a local scope) shall not be used to
5943 declare an entity with linkage.
5945 Only check this for public decls for now. */
5946 tree t1 = TREE_TYPE (decl);
5947 tree t = no_linkage_check (t1, /*relaxed_p=*/false);
5950 if (TYPE_ANONYMOUS_P (t))
5952 if (DECL_EXTERN_C_P (decl))
5953 /* Allow this; it's pretty common in C. */
5955 else if (same_type_ignoring_top_level_qualifiers_p(t1, t))
5956 /* This is something like "enum { a = 3 } x;", which is
5957 well formed. The enum doesn't have "a name with no
5958 linkage", because it has no name. See closed CWG issue
5961 Note that while this construct is well formed in C++03
5962 it is likely to become ill formed in C++0x. See open
5963 CWG issue 389 and related issues. */
5967 /* It's a typedef referring to an anonymous type. */
5968 pedwarn ("non-local variable `%#D' uses anonymous type",
5970 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5972 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5977 pedwarn ("non-local variable `%#D' uses local type `%T'",
5985 /* Create and return a canonical pointer to member function type, for
5986 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
5989 build_ptrmemfunc_type (tree type)
5993 tree unqualified_variant = NULL_TREE;
5995 if (type == error_mark_node)
5998 /* If a canonical type already exists for this type, use it. We use
5999 this method instead of type_hash_canon, because it only does a
6000 simple equality check on the list of field members. */
6002 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6005 /* Make sure that we always have the unqualified pointer-to-member
6007 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6009 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6011 t = make_aggr_type (RECORD_TYPE);
6012 xref_basetypes (t, NULL_TREE);
6014 /* Let the front-end know this is a pointer to member function... */
6015 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6016 /* ... and not really an aggregate. */
6017 SET_IS_AGGR_TYPE (t, 0);
6019 field = build_decl (FIELD_DECL, pfn_identifier, type);
6022 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6023 TREE_CHAIN (field) = fields;
6026 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6028 /* Zap out the name so that the back-end will give us the debugging
6029 information for this anonymous RECORD_TYPE. */
6030 TYPE_NAME (t) = NULL_TREE;
6032 /* If this is not the unqualified form of this pointer-to-member
6033 type, set the TYPE_MAIN_VARIANT for this type to be the
6034 unqualified type. Since they are actually RECORD_TYPEs that are
6035 not variants of each other, we must do this manually. */
6036 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6038 t = build_qualified_type (t, cp_type_quals (type));
6039 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6040 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6041 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6044 /* Cache this pointer-to-member type so that we can find it again
6046 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6051 /* Create and return a pointer to data member type. */
6054 build_ptrmem_type (tree class_type, tree member_type)
6056 if (TREE_CODE (member_type) == METHOD_TYPE)
6060 arg_types = TYPE_ARG_TYPES (member_type);
6061 class_type = (cp_build_qualified_type
6063 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6065 = build_method_type_directly (class_type,
6066 TREE_TYPE (member_type),
6067 TREE_CHAIN (arg_types));
6068 return build_ptrmemfunc_type (build_pointer_type (member_type));
6072 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6073 return build_offset_type (class_type, member_type);
6077 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6078 Check to see that the definition is valid. Issue appropriate error
6079 messages. Return 1 if the definition is particularly bad, or 0
6083 check_static_variable_definition (tree decl, tree type)
6085 /* Motion 10 at San Diego: If a static const integral data member is
6086 initialized with an integral constant expression, the initializer
6087 may appear either in the declaration (within the class), or in
6088 the definition, but not both. If it appears in the class, the
6089 member is a member constant. The file-scope definition is always
6091 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6093 error ("invalid in-class initialization of static data member of non-integral type `%T'",
6095 /* If we just return the declaration, crashes will sometimes
6096 occur. We therefore return void_type_node, as if this were a
6097 friend declaration, to cause callers to completely ignore
6098 this declaration. */
6101 else if (!CP_TYPE_CONST_P (type))
6102 error ("ISO C++ forbids in-class initialization of non-const static member `%D'",
6104 else if (pedantic && !INTEGRAL_TYPE_P (type))
6105 pedwarn ("ISO C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl, type);
6110 /* Given the SIZE (i.e., number of elements) in an array, compute an
6111 appropriate index type for the array. If non-NULL, NAME is the
6112 name of the thing being declared. */
6115 compute_array_index_type (tree name, tree size)
6117 tree type = TREE_TYPE (size);
6120 /* The array bound must be an integer type. */
6121 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6124 error ("size of array `%D' has non-integral type `%T'", name, type);
6126 error ("size of array has non-integral type `%T'", type);
6127 size = integer_one_node;
6128 type = TREE_TYPE (size);
6131 if (abi_version_at_least (2)
6132 /* We should only handle value dependent expressions specially. */
6133 ? value_dependent_expression_p (size)
6134 /* But for abi-1, we handled all instances in templates. This
6135 effects the manglings produced. */
6136 : processing_template_decl)
6137 return build_index_type (build_min (MINUS_EXPR, sizetype,
6138 size, integer_one_node));
6140 /* The size might be the result of a cast. */
6141 STRIP_TYPE_NOPS (size);
6143 /* It might be a const variable or enumeration constant. */
6144 size = decl_constant_value (size);
6146 /* Normally, the array-bound will be a constant. */
6147 if (TREE_CODE (size) == INTEGER_CST)
6149 /* Check to see if the array bound overflowed. Make that an
6150 error, no matter how generous we're being. */
6151 int old_flag_pedantic_errors = flag_pedantic_errors;
6152 int old_pedantic = pedantic;
6153 pedantic = flag_pedantic_errors = 1;
6154 constant_expression_warning (size);
6155 pedantic = old_pedantic;
6156 flag_pedantic_errors = old_flag_pedantic_errors;
6158 /* An array must have a positive number of elements. */
6159 if (INT_CST_LT (size, integer_zero_node))
6162 error ("size of array `%D' is negative", name);
6164 error ("size of array is negative");
6165 size = integer_one_node;
6167 /* As an extension we allow zero-sized arrays. We always allow
6168 them in system headers because glibc uses them. */
6169 else if (integer_zerop (size) && pedantic && !in_system_header)
6172 pedwarn ("ISO C++ forbids zero-size array `%D'", name);
6174 pedwarn ("ISO C++ forbids zero-size array");
6177 else if (TREE_CONSTANT (size))
6179 /* `(int) &fn' is not a valid array bound. */
6181 error ("size of array `%D' is not an integral constant-expression",
6184 error ("size of array is not an integral constant-expression");
6189 pedwarn ("ISO C++ forbids variable-size array `%D'", name);
6191 pedwarn ("ISO C++ forbids variable-size array");
6194 if (processing_template_decl && !TREE_CONSTANT (size))
6195 /* A variable sized array. */
6196 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6199 /* Compute the index of the largest element in the array. It is
6200 one less than the number of elements in the array. */
6202 = fold (cp_build_binary_op (MINUS_EXPR,
6203 cp_convert (ssizetype, size),
6204 cp_convert (ssizetype, integer_one_node)));
6205 if (!TREE_CONSTANT (itype))
6206 /* A variable sized array. */
6207 itype = variable_size (itype);
6208 /* Make sure that there was no overflow when creating to a signed
6209 index type. (For example, on a 32-bit machine, an array with
6210 size 2^32 - 1 is too big.) */
6211 else if (TREE_OVERFLOW (itype))
6213 error ("overflow in array dimension");
6214 TREE_OVERFLOW (itype) = 0;
6218 /* Create and return the appropriate index type. */
6219 return build_index_type (itype);
6222 /* Returns the scope (if any) in which the entity declared by
6223 DECLARATOR will be located. If the entity was declared with an
6224 unqualified name, NULL_TREE is returned. */
6227 get_scope_of_declarator (const cp_declarator *declarator)
6229 while (declarator && declarator->kind != cdk_id)
6230 declarator = declarator->declarator;
6232 /* If the declarator-id is a SCOPE_REF, the scope in which the
6233 declaration occurs is the first operand. */
6235 && declarator->u.id.name
6236 && TREE_CODE (declarator->u.id.name) == SCOPE_REF)
6237 return TREE_OPERAND (declarator->u.id.name, 0);
6239 /* Otherwise, the declarator is not a qualified name; the entity will
6240 be declared in the current scope. */
6244 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6245 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6249 create_array_type_for_decl (tree name, tree type, tree size)
6251 tree itype = NULL_TREE;
6252 const char* error_msg;
6254 /* If things have already gone awry, bail now. */
6255 if (type == error_mark_node || size == error_mark_node)
6256 return error_mark_node;
6258 /* Assume that everything will go OK. */
6261 /* There are some types which cannot be array elements. */
6262 switch (TREE_CODE (type))
6265 error_msg = "array of void";
6269 error_msg = "array of functions";
6272 case REFERENCE_TYPE:
6273 error_msg = "array of references";
6277 error_msg = "array of function members";
6284 /* If something went wrong, issue an error-message and return. */
6288 error ("declaration of `%D' as %s", name, error_msg);
6290 error ("creating %s", error_msg);
6292 return error_mark_node;
6297 The constant expressions that specify the bounds of the arrays
6298 can be omitted only for the first member of the sequence. */
6299 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6302 error ("declaration of `%D' as multidimensional array must have bounds for all dimensions except the first",
6305 error ("multidimensional array must have bounds for all dimensions except the first");
6307 return error_mark_node;
6310 /* Figure out the index type for the array. */
6312 itype = compute_array_index_type (name, size);
6315 T is called the array element type; this type shall not be [...] an
6316 abstract class type. */
6317 abstract_virtuals_error (name, type);
6319 return build_cplus_array_type (type, itype);
6322 /* Check that it's OK to declare a function with the indicated TYPE.
6323 SFK indicates the kind of special function (if any) that this
6324 function is. OPTYPE is the type given in a conversion operator
6325 declaration, or the class type for a constructor/destructor.
6326 Returns the actual return type of the function; that
6327 may be different than TYPE if an error occurs, or for certain
6328 special functions. */
6331 check_special_function_return_type (special_function_kind sfk,
6337 case sfk_constructor:
6339 error ("return type specification for constructor invalid");
6341 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6342 type = build_pointer_type (optype);
6344 type = void_type_node;
6347 case sfk_destructor:
6349 error ("return type specification for destructor invalid");
6350 /* We can't use the proper return type here because we run into
6351 problems with ambiguous bases and covariant returns.
6352 Java classes are left unchanged because (void *) isn't a valid
6353 Java type, and we don't want to change the Java ABI. */
6354 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6355 type = build_pointer_type (void_type_node);
6357 type = void_type_node;
6360 case sfk_conversion:
6361 if (type && !same_type_p (type, optype))
6362 error ("operator `%T' declared to return `%T'", optype, type);
6364 pedwarn ("return type specified for `operator %T'", optype);
6375 /* Given declspecs and a declarator (abstract or otherwise), determine
6376 the name and type of the object declared and construct a DECL node
6379 DECLSPECS is a chain of tree_list nodes whose value fields
6380 are the storage classes and type specifiers.
6382 DECL_CONTEXT says which syntactic context this declaration is in:
6383 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6384 FUNCDEF for a function definition. Like NORMAL but a few different
6385 error messages in each case. Return value may be zero meaning
6386 this definition is too screwy to try to parse.
6387 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6388 handle member functions (which have FIELD context).
6389 Return value may be zero meaning this definition is too screwy to
6391 PARM for a parameter declaration (either within a function prototype
6392 or before a function body). Make a PARM_DECL, or return void_type_node.
6393 CATCHPARM for a parameter declaration before a catch clause.
6394 TYPENAME if for a typename (in a cast or sizeof).
6395 Don't make a DECL node; just return the ..._TYPE node.
6396 FIELD for a struct or union field; make a FIELD_DECL.
6397 BITFIELD for a field with specified width.
6398 INITIALIZED is 1 if the decl has an initializer.
6400 ATTRLIST is a pointer to the list of attributes, which may be NULL
6401 if there are none; *ATTRLIST may be modified if attributes from inside
6402 the declarator should be applied to the declaration.
6404 When this function is called, scoping variables (such as
6405 CURRENT_CLASS_TYPE) should reflect the scope in which the
6406 declaration occurs, not the scope in which the new declaration will
6407 be placed. For example, on:
6411 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6412 should not be `S'. */
6415 grokdeclarator (const cp_declarator *declarator,
6416 const cp_decl_specifier_seq *declspecs,
6417 enum decl_context decl_context,
6421 tree type = NULL_TREE;
6424 int virtualp, explicitp, friendp, inlinep, staticp;
6425 int explicit_int = 0;
6426 int explicit_char = 0;
6427 int defaulted_int = 0;
6428 tree dependant_name = NULL_TREE;
6430 tree typedef_decl = NULL_TREE;
6431 const char *name = NULL;
6432 tree typedef_type = NULL_TREE;
6433 int funcdef_flag = 0;
6434 cp_declarator_kind innermost_code = cdk_error;
6437 /* See the code below that used this. */
6438 tree decl_attr = NULL_TREE;
6441 /* Keep track of what sort of function is being processed
6442 so that we can warn about default return values, or explicit
6443 return values which do not match prescribed defaults. */
6444 special_function_kind sfk = sfk_none;
6446 tree dname = NULL_TREE;
6447 tree ctor_return_type = NULL_TREE;
6448 enum overload_flags flags = NO_SPECIAL;
6449 cp_cv_quals quals = TYPE_UNQUALIFIED;
6450 tree raises = NULL_TREE;
6451 int template_count = 0;
6452 tree returned_attrs = NULL_TREE;
6453 tree parms = NULL_TREE;
6454 const cp_declarator *id_declarator;
6455 /* The unqualified name of the declarator; either an
6456 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6457 tree unqualified_id;
6458 /* The class type, if any, in which this entity is located,
6459 or NULL_TREE if none. Note that this value may be different from
6460 the current class type; for example if an attempt is made to declare
6461 "A::f" inside "B", this value will be "A". */
6462 tree ctype = current_class_type;
6463 /* The NAMESPACE_DECL for the namespace in which this entity is
6464 located. If an unqualified name is used to declare the entity,
6465 this value will be NULL_TREE, even if the entity is located at
6467 tree in_namespace = NULL_TREE;
6469 cp_storage_class storage_class;
6470 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6471 bool type_was_error_mark_node = false;
6473 signed_p = declspecs->specs[(int)ds_signed];
6474 unsigned_p = declspecs->specs[(int)ds_unsigned];
6475 short_p = declspecs->specs[(int)ds_short];
6476 long_p = declspecs->specs[(int)ds_long];
6477 thread_p = declspecs->specs[(int)ds_thread];
6479 if (decl_context == FUNCDEF)
6480 funcdef_flag = 1, decl_context = NORMAL;
6481 else if (decl_context == MEMFUNCDEF)
6482 funcdef_flag = -1, decl_context = FIELD;
6483 else if (decl_context == BITFIELD)
6484 bitfield = 1, decl_context = FIELD;
6486 /* Look inside a declarator for the name being declared
6487 and get it as a string, for an error message. */
6488 for (id_declarator = declarator;
6490 id_declarator = id_declarator->declarator)
6492 if (id_declarator->kind != cdk_id)
6493 innermost_code = id_declarator->kind;
6495 switch (id_declarator->kind)
6498 if (id_declarator->declarator
6499 && id_declarator->declarator->kind == cdk_id)
6501 sfk = id_declarator->declarator->u.id.sfk;
6502 if (sfk == sfk_destructor)
6509 tree decl = id_declarator->u.id.name;
6512 if (TREE_CODE (decl) == SCOPE_REF)
6514 tree qualifying_scope = TREE_OPERAND (decl, 0);
6516 /* It is valid to write:
6518 class C { void f(); };
6522 The standard is not clear about whether `typedef const C D' is
6523 legal; as of 2002-09-15 the committee is considering
6524 that question. EDG 3.0 allows that syntax.
6525 Therefore, we do as well. */
6526 if (qualifying_scope && TYPE_P (qualifying_scope))
6528 ctype = TYPE_MAIN_VARIANT (qualifying_scope);
6529 if (innermost_code != cdk_function
6530 && current_class_type
6531 && !UNIQUELY_DERIVED_FROM_P (ctype,
6532 current_class_type))
6534 error ("type `%T' is not derived from type `%T'",
6535 ctype, current_class_type);
6538 TREE_OPERAND (decl, 0) = ctype;
6540 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6541 in_namespace = qualifying_scope;
6542 decl = TREE_OPERAND (decl, 1);
6544 if (TREE_CODE (decl) == BASELINK)
6545 decl = BASELINK_FUNCTIONS (decl);
6546 if (decl == error_mark_node)
6547 return error_mark_node;
6548 switch (TREE_CODE (decl))
6552 tree type = TREE_OPERAND (decl, 0);
6553 type = constructor_name (type);
6554 name = IDENTIFIER_POINTER (type);
6558 case TEMPLATE_ID_EXPR:
6560 tree fns = TREE_OPERAND (decl, 0);
6563 if (TREE_CODE (dname) == COMPONENT_REF)
6564 dname = TREE_OPERAND (dname, 1);
6565 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6567 gcc_assert (is_overloaded_fn (dname));
6568 dname = DECL_NAME (get_first_fn (dname));
6573 case IDENTIFIER_NODE:
6574 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6577 if (C_IS_RESERVED_WORD (dname))
6579 error ("declarator-id missing; using reserved word `%D'",
6581 name = IDENTIFIER_POINTER (dname);
6583 else if (!IDENTIFIER_TYPENAME_P (dname))
6584 name = IDENTIFIER_POINTER (dname);
6587 gcc_assert (flags == NO_SPECIAL);
6588 flags = TYPENAME_FLAG;
6589 ctor_return_type = TREE_TYPE (dname);
6590 sfk = sfk_conversion;
6591 if (is_typename_at_global_scope (dname))
6592 name = IDENTIFIER_POINTER (dname);
6594 name = "<invalid operator>";
6599 dname = constructor_name (TREE_TYPE (decl));
6600 name = IDENTIFIER_POINTER (dname);
6621 if (id_declarator->kind == cdk_id)
6625 /* A function definition's declarator must have the form of
6626 a function declarator. */
6628 if (funcdef_flag && innermost_code != cdk_function)
6631 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
6632 && innermost_code != cdk_function
6633 && ! (ctype && !declspecs->any_specifiers_p))
6635 error ("declaration of `%D' as non-function", dname);
6636 return void_type_node;
6639 /* Anything declared one level down from the top level
6640 must be one of the parameters of a function
6641 (because the body is at least two levels down). */
6643 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6644 by not allowing C++ class definitions to specify their parameters
6645 with xdecls (must be spec.d in the parmlist).
6647 Since we now wait to push a class scope until we are sure that
6648 we are in a legitimate method context, we must set oldcname
6649 explicitly (since current_class_name is not yet alive).
6651 We also want to avoid calling this a PARM if it is in a namespace. */
6653 if (decl_context == NORMAL && !toplevel_bindings_p ())
6655 struct cp_binding_level *b = current_binding_level;
6656 current_binding_level = b->level_chain;
6657 if (current_binding_level != 0 && toplevel_bindings_p ())
6658 decl_context = PARM;
6659 current_binding_level = b;
6663 name = decl_context == PARM ? "parameter" : "type name";
6665 /* If there were multiple types specified in the decl-specifier-seq,
6666 issue an error message. */
6667 if (declspecs->multiple_types_p)
6668 error ("two or more data types in declaration of `%s'", name);
6669 /* Extract the basic type from the decl-specifier-seq. */
6670 type = declspecs->type;
6671 if (type == error_mark_node)
6674 type_was_error_mark_node = true;
6676 /* If the entire declaration is itself tagged as deprecated then
6677 suppress reports of deprecated items. */
6678 if (type && TREE_DEPRECATED (type)
6679 && deprecated_state != DEPRECATED_SUPPRESS)
6680 warn_deprecated_use (type);
6681 if (type && TREE_CODE (type) == TYPE_DECL)
6683 typedef_decl = type;
6684 type = TREE_TYPE (typedef_decl);
6686 /* No type at all: default to `int', and set DEFAULTED_INT
6687 because it was not a user-defined typedef. */
6688 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
6690 /* These imply 'int'. */
6691 type = integer_type_node;
6695 explicit_int = declspecs->explicit_int_p;
6696 explicit_char = declspecs->explicit_char_p;
6698 /* Check for repeated decl-specifiers. */
6699 for (ds = ds_first; ds != ds_last; ++ds)
6701 unsigned count = declspecs->specs[(int)ds];
6704 /* The "long" specifier is a special case because of
6709 error ("`long long long' is too long for GCC");
6710 else if (pedantic && !in_system_header && warn_long_long)
6711 pedwarn ("ISO C++ does not support `long long'");
6715 else if (declspecs->specs[(int)ds] > 1)
6717 static const char *const decl_spec_names[] = {
6733 error ("duplicate `%s'", decl_spec_names[(int)ds]);
6738 /* See the code below that used this. */
6740 decl_attr = DECL_ATTRIBUTES (typedef_decl);
6742 typedef_type = type;
6745 if (sfk != sfk_conversion)
6746 ctor_return_type = ctype;
6748 if (sfk != sfk_none)
6749 type = check_special_function_return_type (sfk, type,
6751 else if (type == NULL_TREE)
6757 /* We handle `main' specially here, because 'main () { }' is so
6758 common. With no options, it is allowed. With -Wreturn-type,
6759 it is a warning. It is only an error with -pedantic-errors. */
6760 is_main = (funcdef_flag
6761 && dname && MAIN_NAME_P (dname)
6762 && ctype == NULL_TREE
6763 && in_namespace == NULL_TREE
6764 && current_namespace == global_namespace);
6766 if (type_was_error_mark_node)
6767 /* We've already issued an error, don't complain more. */;
6768 else if (in_system_header || flag_ms_extensions)
6769 /* Allow it, sigh. */;
6770 else if (pedantic || ! is_main)
6771 pedwarn ("ISO C++ forbids declaration of `%s' with no type",
6773 else if (warn_return_type)
6774 warning ("ISO C++ forbids declaration of `%s' with no type",
6777 type = integer_type_node;
6782 /* Now process the modifiers that were specified
6783 and check for invalid combinations. */
6785 /* Long double is a special combination. */
6786 if (long_p && TYPE_MAIN_VARIANT (type) == double_type_node)
6789 type = build_qualified_type (long_double_type_node,
6790 cp_type_quals (type));
6793 /* Check all other uses of type modifiers. */
6795 if (unsigned_p || signed_p || long_p || short_p)
6799 if (TREE_CODE (type) == REAL_TYPE)
6800 error ("short, signed or unsigned invalid for `%s'", name);
6801 else if (TREE_CODE (type) != INTEGER_TYPE)
6802 error ("long, short, signed or unsigned invalid for `%s'", name);
6803 else if (long_p && short_p)
6804 error ("long and short specified together for `%s'", name);
6805 else if ((long_p || short_p) && explicit_char)
6806 error ("long or short specified with char for `%s'", name);
6807 else if ((long_p|| short_p) && TREE_CODE (type) == REAL_TYPE)
6808 error ("long or short specified with floating type for `%s'", name);
6809 else if (signed_p && unsigned_p)
6810 error ("signed and unsigned given together for `%s'", name);
6814 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
6816 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
6818 if (flag_pedantic_errors)
6823 /* Discard the type modifiers if they are invalid. */
6834 /* Decide whether an integer type is signed or not.
6835 Optionally treat bitfields as signed by default. */
6839 It is implementation-defined whether a plain (neither
6840 explicitly signed or unsigned) char, short, int, or long
6841 bit-field is signed or unsigned.
6843 Naturally, we extend this to long long as well. Note that
6844 this does not include wchar_t. */
6845 || (bitfield && !flag_signed_bitfields
6847 /* A typedef for plain `int' without `signed' can be
6848 controlled just like plain `int', but a typedef for
6849 `signed int' cannot be so controlled. */
6851 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
6852 && (TREE_CODE (type) == INTEGER_TYPE
6853 || TREE_CODE (type) == CHAR_TYPE)
6854 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
6857 type = long_long_unsigned_type_node;
6859 type = long_unsigned_type_node;
6861 type = short_unsigned_type_node;
6862 else if (type == char_type_node)
6863 type = unsigned_char_type_node;
6864 else if (typedef_decl)
6865 type = c_common_unsigned_type (type);
6867 type = unsigned_type_node;
6869 else if (signed_p && type == char_type_node)
6870 type = signed_char_type_node;
6872 type = long_long_integer_type_node;
6874 type = long_integer_type_node;
6876 type = short_integer_type_node;
6878 if (declspecs->specs[(int)ds_complex])
6880 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
6881 error ("complex invalid for `%s'", name);
6882 /* If we just have "complex", it is equivalent to
6883 "complex double", but if any modifiers at all are specified it is
6884 the complex form of TYPE. E.g, "complex short" is
6885 "complex short int". */
6887 else if (defaulted_int && ! longlong
6888 && ! (long_p || short_p || signed_p || unsigned_p))
6889 type = complex_double_type_node;
6890 else if (type == integer_type_node)
6891 type = complex_integer_type_node;
6892 else if (type == float_type_node)
6893 type = complex_float_type_node;
6894 else if (type == double_type_node)
6895 type = complex_double_type_node;
6896 else if (type == long_double_type_node)
6897 type = complex_long_double_type_node;
6899 type = build_complex_type (type);
6902 type_quals = TYPE_UNQUALIFIED;
6903 if (declspecs->specs[(int)ds_const])
6904 type_quals |= TYPE_QUAL_CONST;
6905 if (declspecs->specs[(int)ds_volatile])
6906 type_quals |= TYPE_QUAL_VOLATILE;
6907 if (declspecs->specs[(int)ds_restrict])
6908 type_quals |= TYPE_QUAL_RESTRICT;
6909 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
6910 error ("qualifiers are not allowed on declaration of `operator %T'",
6913 type_quals |= cp_type_quals (type);
6914 type = cp_build_qualified_type_real
6915 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
6916 ? tf_ignore_bad_quals : 0) | tf_error | tf_warning));
6917 /* We might have ignored or rejected some of the qualifiers. */
6918 type_quals = cp_type_quals (type);
6921 inlinep = !! declspecs->specs[(int)ds_inline];
6922 virtualp = !! declspecs->specs[(int)ds_virtual];
6923 explicitp = !! declspecs->specs[(int)ds_explicit];
6925 storage_class = declspecs->storage_class;
6926 if (storage_class == sc_static)
6927 staticp = 1 + (decl_context == FIELD);
6929 if (virtualp && staticp == 2)
6931 error ("member `%D' cannot be declared both virtual and static",
6935 friendp = !! declspecs->specs[(int)ds_friend];
6937 if (dependant_name && !friendp)
6939 error ("`%T::%D' is not a valid declarator", ctype, dependant_name);
6940 return void_type_node;
6943 /* Issue errors about use of storage classes for parameters. */
6944 if (decl_context == PARM)
6946 if (declspecs->specs[(int)ds_typedef])
6947 error ("typedef declaration invalid in parameter declaration");
6948 else if (storage_class == sc_static
6949 || storage_class == sc_extern
6951 error ("storage class specifiers invalid in parameter declarations");
6954 /* Give error if `virtual' is used outside of class declaration. */
6956 && (current_class_name == NULL_TREE || decl_context != FIELD))
6958 error ("virtual outside class declaration");
6962 /* Static anonymous unions are dealt with here. */
6963 if (staticp && decl_context == TYPENAME
6965 && ANON_AGGR_TYPE_P (declspecs->type))
6966 decl_context = FIELD;
6968 /* Warn about storage classes that are invalid for certain
6969 kinds of declarations (parameters, typenames, etc.). */
6970 if (declspecs->multiple_storage_classes_p)
6971 error ("multiple storage classes in declaration of `%s'", name);
6974 && storage_class != sc_extern
6975 && storage_class != sc_static)
6976 || declspecs->specs[(int)ds_typedef]))
6978 error ("multiple storage classes in declaration of `%s'", name);
6981 else if (decl_context != NORMAL
6982 && ((storage_class != sc_none
6983 && storage_class != sc_mutable)
6986 if ((decl_context == PARM || decl_context == CATCHPARM)
6987 && (storage_class == sc_register
6988 || storage_class == sc_auto))
6990 else if (declspecs->specs[(int)ds_typedef])
6992 else if (decl_context == FIELD
6993 /* C++ allows static class elements. */
6994 && storage_class == sc_static)
6995 /* C++ also allows inlines and signed and unsigned elements,
6996 but in those cases we don't come in here. */
7000 if (decl_context == FIELD)
7002 tree tmp = NULL_TREE;
7007 /* Avoid trying to get an operand off an identifier node. */
7008 if (declarator->kind != cdk_id)
7009 tmp = declarator->declarator->u.id.name;
7011 tmp = declarator->u.id.name;
7012 op = IDENTIFIER_OPNAME_P (tmp);
7013 if (IDENTIFIER_TYPENAME_P (tmp))
7015 if (is_typename_at_global_scope (tmp))
7016 name = IDENTIFIER_POINTER (tmp);
7018 name = "<invalid operator>";
7021 error ("storage class specified for %s `%s'",
7022 op ? "member operator" : "field",
7027 if (decl_context == PARM || decl_context == CATCHPARM)
7028 error ("storage class specified for parameter `%s'", name);
7030 error ("storage class specified for typename");
7032 if (storage_class == sc_register
7033 || storage_class == sc_auto
7034 || storage_class == sc_extern
7036 storage_class = sc_none;
7039 else if (storage_class == sc_extern && initialized
7042 if (toplevel_bindings_p ())
7044 /* It's common practice (and completely valid) to have a const
7045 be initialized and declared extern. */
7046 if (!(type_quals & TYPE_QUAL_CONST))
7047 warning ("`%s' initialized and declared `extern'", name);
7050 error ("`%s' has both `extern' and initializer", name);
7052 else if (storage_class == sc_extern && funcdef_flag
7053 && ! toplevel_bindings_p ())
7054 error ("nested function `%s' declared `extern'", name);
7055 else if (toplevel_bindings_p ())
7057 if (storage_class == sc_auto)
7058 error ("top-level declaration of `%s' specifies `auto'", name);
7061 && storage_class != sc_extern
7062 && storage_class != sc_static)
7064 error ("function-scope `%s' implicitly auto and declared `__thread'",
7069 if (storage_class && friendp)
7070 error ("storage class specifiers invalid in friend function declarations");
7073 unqualified_id = NULL_TREE;
7076 unqualified_id = id_declarator->u.id.name;
7077 if (TREE_CODE (unqualified_id) == SCOPE_REF)
7078 unqualified_id = TREE_OPERAND (unqualified_id, 1);
7079 if (TREE_CODE (unqualified_id) == BASELINK)
7080 unqualified_id = BASELINK_FUNCTIONS (unqualified_id);
7081 switch (TREE_CODE (unqualified_id))
7085 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7090 = constructor_name (TREE_TYPE (unqualified_id));
7093 case IDENTIFIER_NODE:
7094 case TEMPLATE_ID_EXPR:
7102 /* Determine the type of the entity declared by recurring on the
7105 declarator && declarator->kind != cdk_id;
7106 declarator = declarator->declarator)
7108 const cp_declarator *inner_declarator;
7111 if (type == error_mark_node)
7112 return error_mark_node;
7114 inner_declarator = declarator->declarator;
7116 attrs = declarator->attributes;
7122 if (declarator == NULL || declarator->kind == cdk_id)
7123 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7124 if (declarator->kind == cdk_function)
7125 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7126 if (declarator->kind == cdk_array)
7127 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7128 returned_attrs = decl_attributes (&type,
7129 chainon (returned_attrs, attrs),
7133 switch (declarator->kind)
7136 type = create_array_type_for_decl (dname, type,
7137 declarator->u.array.bounds);
7138 if (inner_declarator
7139 && (inner_declarator->kind == cdk_pointer
7140 || inner_declarator->kind == cdk_reference
7141 || inner_declarator->kind == cdk_ptrmem))
7142 /* We can never complete an array type which is the
7143 target of a pointer, so go ahead and lay it out. */
7152 /* Declaring a function type.
7153 Make sure we have a valid type for the function to return. */
7155 /* We now know that the TYPE_QUALS don't apply to the
7156 decl, but to its return type. */
7157 type_quals = TYPE_UNQUALIFIED;
7159 /* Warn about some types functions can't return. */
7161 if (TREE_CODE (type) == FUNCTION_TYPE)
7163 error ("`%s' declared as function returning a function", name);
7164 type = integer_type_node;
7166 if (TREE_CODE (type) == ARRAY_TYPE)
7168 error ("`%s' declared as function returning an array", name);
7169 type = integer_type_node;
7172 /* Pick up type qualifiers which should be applied to `this'. */
7173 quals = declarator->u.function.qualifiers;
7175 /* Pick up the exception specifications. */
7176 raises = declarator->u.function.exception_specification;
7178 /* Say it's a definition only for the CALL_EXPR
7179 closest to the identifier. */
7180 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7182 if (ctype == NULL_TREE
7183 && decl_context == FIELD
7185 && (friendp == 0 || dname == current_class_name))
7186 ctype = current_class_type;
7188 if (ctype && sfk == sfk_conversion)
7189 TYPE_HAS_CONVERSION (ctype) = 1;
7190 if (ctype && (sfk == sfk_constructor
7191 || sfk == sfk_destructor))
7193 /* We are within a class's scope. If our declarator name
7194 is the same as the class name, and we are defining
7195 a function, then it is a constructor/destructor, and
7196 therefore returns a void type. */
7198 if (flags == DTOR_FLAG)
7200 /* ISO C++ 12.4/2. A destructor may not be
7201 declared const or volatile. A destructor may
7204 error ("destructor cannot be static member function");
7207 error ("destructors may not be cv-qualified");
7208 quals = TYPE_UNQUALIFIED;
7210 if (decl_context == FIELD)
7212 if (! member_function_or_else (ctype,
7215 return void_type_node;
7218 else /* It's a constructor. */
7222 /* ISO C++ 12.1. A constructor may not be
7223 declared const or volatile. A constructor may
7224 not be virtual. A constructor may not be
7227 error ("constructor cannot be static member function");
7230 pedwarn ("constructors cannot be declared virtual");
7235 error ("constructors may not be cv-qualified");
7236 quals = TYPE_UNQUALIFIED;
7238 if (decl_context == FIELD)
7240 if (! member_function_or_else (ctype,
7243 return void_type_node;
7244 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
7245 if (sfk != sfk_constructor)
7249 if (decl_context == FIELD)
7255 error ("can't initialize friend function `%s'", name);
7258 /* Cannot be both friend and virtual. */
7259 error ("virtual functions cannot be friends");
7262 if (decl_context == NORMAL)
7263 error ("friend declaration not in class definition");
7264 if (current_function_decl && funcdef_flag)
7265 error ("can't define friend function `%s' in a local class definition",
7269 arg_types = grokparms (declarator->u.function.parameters,
7272 if (inner_declarator
7273 && inner_declarator->kind == cdk_id
7274 && inner_declarator->u.id.sfk == sfk_destructor
7275 && arg_types != void_list_node)
7277 error ("destructors may not have parameters");
7278 arg_types = void_list_node;
7282 type = build_function_type (type, arg_types);
7289 /* Filter out pointers-to-references and references-to-references.
7290 We can get these if a TYPE_DECL is used. */
7292 if (TREE_CODE (type) == REFERENCE_TYPE)
7294 error (declarator->kind == cdk_reference
7295 ? "cannot declare reference to `%#T'"
7296 : "cannot declare pointer to `%#T'", type);
7297 type = TREE_TYPE (type);
7299 else if (VOID_TYPE_P (type))
7301 if (declarator->kind == cdk_reference)
7302 error ("cannot declare reference to `%#T'", type);
7303 else if (declarator->kind == cdk_ptrmem)
7304 error ("cannot declare pointer to `%#T' member", type);
7307 /* We now know that the TYPE_QUALS don't apply to the decl,
7308 but to the target of the pointer. */
7309 type_quals = TYPE_UNQUALIFIED;
7311 if (declarator->kind == cdk_ptrmem
7312 && (TREE_CODE (type) == FUNCTION_TYPE
7313 || (quals && TREE_CODE (type) == METHOD_TYPE)))
7315 tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
7316 grok_method_quals (declarator->u.pointer.class_type,
7318 type = TREE_TYPE (dummy);
7319 quals = TYPE_UNQUALIFIED;
7322 if (declarator->kind == cdk_reference)
7324 if (!VOID_TYPE_P (type))
7325 type = build_reference_type (type);
7327 else if (TREE_CODE (type) == METHOD_TYPE)
7328 type = build_ptrmemfunc_type (build_pointer_type (type));
7329 else if (declarator->kind == cdk_ptrmem)
7330 type = build_ptrmem_type (declarator->u.pointer.class_type,
7333 type = build_pointer_type (type);
7335 /* Process a list of type modifier keywords (such as
7336 const or volatile) that were given inside the `*' or `&'. */
7338 if (declarator->u.pointer.qualifiers)
7341 = cp_build_qualified_type (type,
7342 declarator->u.pointer.qualifiers);
7343 type_quals = cp_type_quals (type);
7356 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7357 && TREE_CODE (type) != FUNCTION_TYPE
7358 && TREE_CODE (type) != METHOD_TYPE)
7360 error ("template-id `%D' used as a declarator",
7362 unqualified_id = dname;
7365 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7366 otherwise, we would not have exited the loop above. */
7368 && TREE_CODE (declarator->u.id.name) == SCOPE_REF
7369 /* If the qualifying scope was invalid, it will have been set to
7371 && TREE_OPERAND (declarator->u.id.name, 0)
7372 && TYPE_P (TREE_OPERAND (declarator->u.id.name, 0)))
7376 ctype = TREE_OPERAND (declarator->u.id.name, 0);
7378 ctype = TYPE_MAIN_VARIANT (ctype);
7380 while (t != NULL_TREE && CLASS_TYPE_P (t))
7382 /* You're supposed to have one `template <...>' for every
7383 template class, but you don't need one for a full
7384 specialization. For example:
7386 template <class T> struct S{};
7387 template <> struct S<int> { void f(); };
7388 void S<int>::f () {}
7390 is correct; there shouldn't be a `template <>' for the
7391 definition of `S<int>::f'. */
7392 if (CLASSTYPE_TEMPLATE_INFO (t)
7393 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t)
7394 || uses_template_parms (CLASSTYPE_TI_ARGS (t)))
7395 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7396 template_count += 1;
7398 t = TYPE_MAIN_DECL (t);
7399 t = DECL_CONTEXT (t);
7402 if (ctype == current_class_type)
7408 Is this ill-formed? */
7411 pedwarn ("extra qualification `%T::' on member `%s' ignored",
7414 else if (TREE_CODE (type) == FUNCTION_TYPE)
7416 tree sname = TREE_OPERAND (declarator->u.id.name, 1);
7418 if (TREE_CODE (sname) == IDENTIFIER_NODE
7419 && NEW_DELETE_OPNAME_P (sname))
7420 /* Overloaded operator new and operator delete
7421 are always static functions. */
7423 else if (current_class_type == NULL_TREE || friendp)
7425 = build_method_type_directly (ctype,
7427 TYPE_ARG_TYPES (type));
7430 error ("cannot declare member function `%T::%s' within `%T'",
7431 ctype, name, current_class_type);
7432 return error_mark_node;
7435 else if (declspecs->specs[(int)ds_typedef]
7436 || COMPLETE_TYPE_P (complete_type (ctype)))
7438 /* Have to move this code elsewhere in this function.
7439 this code is used for i.e., typedef int A::M; M *pm;
7441 It is? How? jason 10/2/94 */
7443 if (current_class_type)
7445 error ("cannot declare member `%T::%s' within `%T'",
7446 ctype, name, current_class_type);
7447 return void_type_node;
7452 cxx_incomplete_type_error (NULL_TREE, ctype);
7453 return error_mark_node;
7460 *attrlist = chainon (returned_attrs, *attrlist);
7462 attrlist = &returned_attrs;
7465 /* Now TYPE has the actual type. */
7467 /* Did array size calculations overflow? */
7469 if (TREE_CODE (type) == ARRAY_TYPE
7470 && COMPLETE_TYPE_P (type)
7471 && TREE_OVERFLOW (TYPE_SIZE (type)))
7473 error ("size of array `%s' is too large", name);
7474 /* If we proceed with the array type as it is, we'll eventually
7475 crash in tree_low_cst(). */
7476 type = error_mark_node;
7479 if ((decl_context == FIELD || decl_context == PARM)
7480 && !processing_template_decl
7481 && variably_modified_type_p (type, NULL_TREE))
7483 if (decl_context == FIELD)
7484 error ("data member may not have variably modified type `%T'", type);
7486 error ("parameter may not have variably modified type `%T'", type);
7487 type = error_mark_node;
7490 if (explicitp == 1 || (explicitp && friendp))
7492 /* [dcl.fct.spec] The explicit specifier shall only be used in
7493 declarations of constructors within a class definition. */
7494 error ("only declarations of constructors can be `explicit'");
7498 if (storage_class == sc_mutable)
7500 if (decl_context != FIELD || friendp)
7502 error ("non-member `%s' cannot be declared `mutable'", name);
7503 storage_class = sc_none;
7505 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7507 error ("non-object member `%s' cannot be declared `mutable'", name);
7508 storage_class = sc_none;
7510 else if (TREE_CODE (type) == FUNCTION_TYPE
7511 || TREE_CODE (type) == METHOD_TYPE)
7513 error ("function `%s' cannot be declared `mutable'", name);
7514 storage_class = sc_none;
7518 error ("static `%s' cannot be declared `mutable'", name);
7519 storage_class = sc_none;
7521 else if (type_quals & TYPE_QUAL_CONST)
7523 error ("const `%s' cannot be declared `mutable'", name);
7524 storage_class = sc_none;
7528 /* If this is declaring a typedef name, return a TYPE_DECL. */
7529 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7533 /* Note that the grammar rejects storage classes
7534 in typenames, fields or parameters. */
7535 if (current_lang_name == lang_name_java)
7536 TYPE_FOR_JAVA (type) = 1;
7538 if (decl_context == FIELD)
7540 if (constructor_name_p (unqualified_id, current_class_type))
7541 pedwarn ("ISO C++ forbids nested type `%D' with same name as enclosing class",
7543 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7547 decl = build_decl (TYPE_DECL, unqualified_id, type);
7548 if (in_namespace || ctype)
7549 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7550 if (!current_function_decl)
7551 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7554 /* If the user declares "typedef struct {...} foo" then the
7555 struct will have an anonymous name. Fill that name in now.
7556 Nothing can refer to it, so nothing needs know about the name
7558 if (type != error_mark_node
7561 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7562 && TYPE_ANONYMOUS_P (type)
7563 /* Don't do this if there are attributes. */
7564 && (!attrlist || !*attrlist)
7565 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7567 tree oldname = TYPE_NAME (type);
7570 /* Replace the anonymous name with the real name everywhere. */
7571 lookup_tag_reverse (type, unqualified_id);
7572 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7573 if (TYPE_NAME (t) == oldname)
7574 TYPE_NAME (t) = decl;
7576 if (TYPE_LANG_SPECIFIC (type))
7577 TYPE_WAS_ANONYMOUS (type) = 1;
7579 /* If this is a typedef within a template class, the nested
7580 type is a (non-primary) template. The name for the
7581 template needs updating as well. */
7582 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7583 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7584 = TYPE_IDENTIFIER (type);
7586 /* FIXME remangle member functions; member functions of a
7587 type with external linkage have external linkage. */
7592 if (ctype == NULL_TREE)
7594 if (TREE_CODE (type) != METHOD_TYPE)
7595 error ("%Jinvalid type qualifier for non-member function type",
7598 ctype = TYPE_METHOD_BASETYPE (type);
7600 if (ctype != NULL_TREE)
7601 grok_method_quals (ctype, decl, quals);
7605 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7606 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7608 bad_specifiers (decl, "type", virtualp, quals != TYPE_UNQUALIFIED,
7609 inlinep, friendp, raises != NULL_TREE);
7614 /* Detect the case of an array type of unspecified size
7615 which came, as such, direct from a typedef name.
7616 We must copy the type, so that the array's domain can be
7617 individually set by the object's initializer. */
7619 if (type && typedef_type
7620 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7621 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7622 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7624 /* Detect where we're using a typedef of function type to declare a
7625 function. PARMS will not be set, so we must create it now. */
7627 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
7629 tree decls = NULL_TREE;
7632 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
7634 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
7636 TREE_CHAIN (decl) = decls;
7640 parms = nreverse (decls);
7643 /* If this is a type name (such as, in a cast or sizeof),
7644 compute the type and return it now. */
7646 if (decl_context == TYPENAME)
7648 /* Note that the grammar rejects storage classes
7649 in typenames, fields or parameters. */
7650 if (type_quals != TYPE_UNQUALIFIED)
7651 type_quals = TYPE_UNQUALIFIED;
7653 /* Special case: "friend class foo" looks like a TYPENAME context. */
7656 if (type_quals != TYPE_UNQUALIFIED)
7658 error ("type qualifiers specified for friend class declaration");
7659 type_quals = TYPE_UNQUALIFIED;
7663 error ("`inline' specified for friend class declaration");
7669 /* Don't allow friend declaration without a class-key. */
7670 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
7671 pedwarn ("template parameters cannot be friends");
7672 else if (TREE_CODE (type) == TYPENAME_TYPE)
7673 pedwarn ("friend declaration requires class-key, "
7674 "i.e. `friend class %T::%D'",
7675 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
7677 pedwarn ("friend declaration requires class-key, "
7678 "i.e. `friend %#T'",
7682 /* Only try to do this stuff if we didn't already give up. */
7683 if (type != integer_type_node)
7685 /* A friendly class? */
7686 if (current_class_type)
7687 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
7690 error ("trying to make class `%T' a friend of global scope",
7693 type = void_type_node;
7698 if (ctype == NULL_TREE)
7700 if (TREE_CODE (type) != METHOD_TYPE)
7701 error ("invalid qualifiers on non-member function type");
7703 ctype = TYPE_METHOD_BASETYPE (type);
7707 tree dummy = build_decl (TYPE_DECL, unqualified_id, type);
7708 grok_method_quals (ctype, dummy, quals);
7709 type = TREE_TYPE (dummy);
7715 else if (unqualified_id == NULL_TREE && decl_context != PARM
7716 && decl_context != CATCHPARM
7717 && TREE_CODE (type) != UNION_TYPE
7720 error ("abstract declarator `%T' used as declaration", type);
7721 unqualified_id = make_anon_name ();
7724 /* `void' at top level (not within pointer)
7725 is allowed only in typedefs or type names.
7726 We don't complain about parms either, but that is because
7727 a better error message can be made later. */
7729 if (TREE_CODE (type) == VOID_TYPE && decl_context != PARM)
7731 if (! unqualified_id)
7732 error ("unnamed variable or field declared void");
7733 else if (TREE_CODE (unqualified_id) == IDENTIFIER_NODE)
7735 gcc_assert (!IDENTIFIER_OPNAME_P (unqualified_id));
7736 error ("variable or field `%s' declared void", name);
7739 error ("variable or field declared void");
7740 type = integer_type_node;
7743 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7744 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7746 if (decl_context == PARM || decl_context == CATCHPARM)
7748 if (ctype || in_namespace)
7749 error ("cannot use `::' in parameter declaration");
7751 /* A parameter declared as an array of T is really a pointer to T.
7752 One declared as a function is really a pointer to a function.
7753 One declared as a member is really a pointer to member. */
7755 if (TREE_CODE (type) == ARRAY_TYPE)
7757 /* Transfer const-ness of array into that of type pointed to. */
7758 type = build_pointer_type (TREE_TYPE (type));
7759 type_quals = TYPE_UNQUALIFIED;
7761 else if (TREE_CODE (type) == FUNCTION_TYPE)
7762 type = build_pointer_type (type);
7768 if (decl_context == PARM)
7770 decl = cp_build_parm_decl (unqualified_id, type);
7772 bad_specifiers (decl, "parameter", virtualp, quals != TYPE_UNQUALIFIED,
7773 inlinep, friendp, raises != NULL_TREE);
7775 else if (decl_context == FIELD)
7777 /* The C99 flexible array extension. */
7778 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
7779 && TYPE_DOMAIN (type) == NULL_TREE)
7781 tree itype = compute_array_index_type (dname, integer_zero_node);
7782 type = build_cplus_array_type (TREE_TYPE (type), itype);
7785 if (type == error_mark_node)
7787 /* Happens when declaring arrays of sizes which
7788 are error_mark_node, for example. */
7791 else if (in_namespace && !friendp)
7793 /* Something like struct S { int N::j; }; */
7794 error ("invalid use of `::'");
7797 else if (TREE_CODE (type) == FUNCTION_TYPE)
7800 tree function_context;
7802 /* We catch the others as conflicts with the builtin
7804 if (friendp && unqualified_id == ridpointers[(int) RID_SIGNED])
7806 error ("function `%D' cannot be declared friend",
7813 if (ctype == NULL_TREE)
7814 ctype = current_class_type;
7816 if (ctype == NULL_TREE)
7818 error ("can't make `%D' into a method -- not in a class",
7820 return void_type_node;
7823 /* ``A union may [ ... ] not [ have ] virtual functions.''
7825 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
7827 error ("function `%D' declared virtual inside a union",
7829 return void_type_node;
7832 if (NEW_DELETE_OPNAME_P (unqualified_id))
7836 error ("`%D' cannot be declared virtual, since it is always static",
7841 else if (staticp < 2)
7842 type = build_method_type_directly (ctype,
7844 TYPE_ARG_TYPES (type));
7847 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7848 function_context = (ctype != NULL_TREE) ?
7849 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
7850 publicp = (! friendp || ! staticp)
7851 && function_context == NULL_TREE;
7852 decl = grokfndecl (ctype, type,
7853 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7854 ? unqualified_id : dname,
7857 virtualp, flags, quals, raises,
7858 friendp ? -1 : 0, friendp, publicp, inlinep,
7859 funcdef_flag, template_count, in_namespace, attrlist);
7860 if (decl == NULL_TREE)
7863 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7864 /* The decl and setting of decl_attr is also turned off. */
7865 decl = build_decl_attribute_variant (decl, decl_attr);
7868 /* [class.conv.ctor]
7870 A constructor declared without the function-specifier
7871 explicit that can be called with a single parameter
7872 specifies a conversion from the type of its first
7873 parameter to the type of its class. Such a constructor
7874 is called a converting constructor. */
7876 DECL_NONCONVERTING_P (decl) = 1;
7877 else if (DECL_CONSTRUCTOR_P (decl))
7879 /* The constructor can be called with exactly one
7880 parameter if there is at least one parameter, and
7881 any subsequent parameters have default arguments.
7882 Ignore any compiler-added parms. */
7883 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
7885 if (arg_types == void_list_node
7887 && TREE_CHAIN (arg_types)
7888 && TREE_CHAIN (arg_types) != void_list_node
7889 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
7890 DECL_NONCONVERTING_P (decl) = 1;
7893 else if (TREE_CODE (type) == METHOD_TYPE)
7895 /* We only get here for friend declarations of
7896 members of other classes. */
7897 /* All method decls are public, so tell grokfndecl to set
7898 TREE_PUBLIC, also. */
7899 decl = grokfndecl (ctype, type,
7900 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7901 ? unqualified_id : dname,
7904 virtualp, flags, quals, raises,
7905 friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
7906 template_count, in_namespace, attrlist);
7907 if (decl == NULL_TREE)
7910 else if (!staticp && !dependent_type_p (type)
7911 && !COMPLETE_TYPE_P (complete_type (type))
7912 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
7915 error ("field `%D' has incomplete type", unqualified_id);
7917 error ("name `%T' has incomplete type", type);
7919 /* If we're instantiating a template, tell them which
7920 instantiation made the field's type be incomplete. */
7921 if (current_class_type
7922 && TYPE_NAME (current_class_type)
7923 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
7925 && declspecs->type == type)
7926 error (" in instantiation of template `%T'",
7927 current_class_type);
7929 type = error_mark_node;
7936 error ("`%E' is neither function nor member function; "
7937 "cannot be declared friend", unqualified_id);
7945 /* Friends are treated specially. */
7946 if (ctype == current_class_type)
7947 warning ("member functions are implicitly friends of their class");
7948 else if (decl && DECL_NAME (decl))
7950 if (template_class_depth (current_class_type) == 0)
7952 decl = check_explicit_specialization
7953 (unqualified_id, decl, template_count,
7954 2 * (funcdef_flag != 0) + 4);
7955 if (decl == error_mark_node)
7956 return error_mark_node;
7959 decl = do_friend (ctype, unqualified_id, decl,
7960 *attrlist, flags, quals, funcdef_flag);
7964 return void_type_node;
7967 /* Structure field. It may not be a function, except for C++. */
7969 if (decl == NULL_TREE)
7975 /* An attempt is being made to initialize a non-static
7976 member. But, from [class.mem]:
7978 4 A member-declarator can contain a
7979 constant-initializer only if it declares a static
7980 member (_class.static_) of integral or enumeration
7981 type, see _class.static.data_.
7983 This used to be relatively common practice, but
7984 the rest of the compiler does not correctly
7985 handle the initialization unless the member is
7986 static so we make it static below. */
7987 pedwarn ("ISO C++ forbids initialization of member `%D'",
7989 pedwarn ("making `%D' static", unqualified_id);
7993 if (uses_template_parms (type))
7994 /* We'll check at instantiation time. */
7996 else if (check_static_variable_definition (unqualified_id,
7998 /* If we just return the declaration, crashes
7999 will sometimes occur. We therefore return
8000 void_type_node, as if this was a friend
8001 declaration, to cause callers to completely
8002 ignore this declaration. */
8003 return void_type_node;
8008 /* C++ allows static class members. All other work
8009 for this is done by grokfield. */
8010 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8011 set_linkage_for_static_data_member (decl);
8012 /* Even if there is an in-class initialization, DECL
8013 is considered undefined until an out-of-class
8014 definition is provided. */
8015 DECL_EXTERNAL (decl) = 1;
8019 decl = build_decl (FIELD_DECL, unqualified_id, type);
8020 DECL_NONADDRESSABLE_P (decl) = bitfield;
8021 if (storage_class == sc_mutable)
8023 DECL_MUTABLE_P (decl) = 1;
8024 storage_class = sc_none;
8028 bad_specifiers (decl, "field", virtualp, quals != TYPE_UNQUALIFIED,
8029 inlinep, friendp, raises != NULL_TREE);
8032 else if (TREE_CODE (type) == FUNCTION_TYPE
8033 || TREE_CODE (type) == METHOD_TYPE)
8038 if (!unqualified_id)
8041 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8042 original_name = dname;
8044 original_name = unqualified_id;
8046 if (storage_class == sc_auto)
8047 error ("storage class `auto' invalid for function `%s'", name);
8048 else if (storage_class == sc_register)
8049 error ("storage class `register' invalid for function `%s'", name);
8051 error ("storage class `__thread' invalid for function `%s'", name);
8053 /* Function declaration not at top level.
8054 Storage classes other than `extern' are not allowed
8055 and `extern' makes no difference. */
8056 if (! toplevel_bindings_p ()
8057 && (storage_class == sc_static
8058 || declspecs->specs[(int)ds_inline])
8061 if (storage_class == sc_static)
8062 pedwarn ("`static' specified invalid for function `%s' declared out of global scope", name);
8064 pedwarn ("`inline' specifier invalid for function `%s' declared out of global scope", name);
8067 if (ctype == NULL_TREE)
8071 error ("virtual non-class function `%s'", name);
8075 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8076 && !NEW_DELETE_OPNAME_P (original_name))
8077 type = build_method_type_directly (ctype,
8079 TYPE_ARG_TYPES (type));
8081 /* Record presence of `static'. */
8082 publicp = (ctype != NULL_TREE
8083 || storage_class == sc_extern
8084 || storage_class != sc_static);
8086 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8087 virtualp, flags, quals, raises,
8089 publicp, inlinep, funcdef_flag,
8090 template_count, in_namespace, attrlist);
8091 if (decl == NULL_TREE)
8096 int invalid_static = 0;
8098 /* Don't allow a static member function in a class, and forbid
8099 declaring main to be static. */
8100 if (TREE_CODE (type) == METHOD_TYPE)
8102 pedwarn ("cannot declare member function `%D' to have static linkage", decl);
8105 else if (current_function_decl)
8107 /* FIXME need arm citation */
8108 error ("cannot declare static function inside another function");
8115 storage_class = sc_none;
8121 /* It's a variable. */
8123 /* An uninitialized decl with `extern' is a reference. */
8124 decl = grokvardecl (type, unqualified_id,
8127 (type_quals & TYPE_QUAL_CONST) != 0,
8128 ctype ? ctype : in_namespace);
8129 bad_specifiers (decl, "variable", virtualp, quals != TYPE_UNQUALIFIED,
8130 inlinep, friendp, raises != NULL_TREE);
8134 DECL_CONTEXT (decl) = ctype;
8137 pedwarn ("`static' may not be used when defining (as opposed to declaring) a static data member");
8139 storage_class = sc_none;
8141 if (storage_class == sc_register && TREE_STATIC (decl))
8143 error ("static member `%D' declared `register'", decl);
8144 storage_class = sc_none;
8146 if (storage_class == sc_extern && pedantic)
8148 pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
8150 storage_class = sc_none;
8155 /* Record `register' declaration for warnings on &
8156 and in case doing stupid register allocation. */
8158 if (storage_class == sc_register)
8159 DECL_REGISTER (decl) = 1;
8160 else if (storage_class == sc_extern)
8161 DECL_THIS_EXTERN (decl) = 1;
8162 else if (storage_class == sc_static)
8163 DECL_THIS_STATIC (decl) = 1;
8165 /* Record constancy and volatility. There's no need to do this
8166 when processing a template; we'll do this for the instantiated
8167 declaration based on the type of DECL. */
8168 if (!processing_template_decl)
8169 c_apply_type_quals_to_decl (type_quals, decl);
8175 /* Subroutine of start_function. Ensure that each of the parameter
8176 types (as listed in PARMS) is complete, as is required for a
8177 function definition. */
8180 require_complete_types_for_parms (tree parms)
8182 for (; parms; parms = TREE_CHAIN (parms))
8184 if (VOID_TYPE_P (TREE_TYPE (parms)))
8185 /* grokparms will have already issued an error. */
8186 TREE_TYPE (parms) = error_mark_node;
8187 else if (complete_type_or_else (TREE_TYPE (parms), parms))
8189 layout_decl (parms, 0);
8190 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8195 /* Returns nonzero if T is a local variable. */
8198 local_variable_p (tree t)
8200 if ((TREE_CODE (t) == VAR_DECL
8201 /* A VAR_DECL with a context that is a _TYPE is a static data
8203 && !TYPE_P (CP_DECL_CONTEXT (t))
8204 /* Any other non-local variable must be at namespace scope. */
8205 && !DECL_NAMESPACE_SCOPE_P (t))
8206 || (TREE_CODE (t) == PARM_DECL))
8212 /* Returns nonzero if T is an automatic local variable or a label.
8213 (These are the declarations that need to be remapped when the code
8214 containing them is duplicated.) */
8217 nonstatic_local_decl_p (tree t)
8219 return ((local_variable_p (t) && !TREE_STATIC (t))
8220 || TREE_CODE (t) == LABEL_DECL
8221 || TREE_CODE (t) == RESULT_DECL);
8224 /* Like local_variable_p, but suitable for use as a tree-walking
8228 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8229 void *data ATTRIBUTE_UNUSED)
8231 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8233 else if (TYPE_P (*tp))
8240 /* Check that ARG, which is a default-argument expression for a
8241 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8242 something goes wrong. DECL may also be a _TYPE node, rather than a
8243 DECL, if there is no DECL available. */
8246 check_default_argument (tree decl, tree arg)
8251 if (TREE_CODE (arg) == DEFAULT_ARG)
8252 /* We get a DEFAULT_ARG when looking at an in-class declaration
8253 with a default argument. Ignore the argument for now; we'll
8254 deal with it after the class is complete. */
8257 if (processing_template_decl || uses_template_parms (arg))
8258 /* We don't do anything checking until instantiation-time. Note
8259 that there may be uninstantiated arguments even for an
8260 instantiated function, since default arguments are not
8261 instantiated until they are needed. */
8270 decl_type = TREE_TYPE (decl);
8272 if (arg == error_mark_node
8273 || decl == error_mark_node
8274 || TREE_TYPE (arg) == error_mark_node
8275 || decl_type == error_mark_node)
8276 /* Something already went wrong. There's no need to check
8278 return error_mark_node;
8280 /* [dcl.fct.default]
8282 A default argument expression is implicitly converted to the
8284 if (!TREE_TYPE (arg)
8285 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
8288 error ("default argument for `%#D' has type `%T'",
8289 decl, TREE_TYPE (arg));
8291 error ("default argument for parameter of type `%T' has type `%T'",
8292 decl_type, TREE_TYPE (arg));
8294 return error_mark_node;
8297 /* [dcl.fct.default]
8299 Local variables shall not be used in default argument
8302 The keyword `this' shall not be used in a default argument of a
8304 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8308 error ("default argument `%E' uses local variable `%D'",
8310 return error_mark_node;
8317 /* Decode the list of parameter types for a function type.
8318 Given the list of things declared inside the parens,
8319 return a list of types.
8321 If this parameter does not end with an ellipsis, we append
8324 *PARMS is set to the chain of PARM_DECLs created. */
8327 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8329 tree result = NULL_TREE;
8330 tree decls = NULL_TREE;
8331 int ellipsis = !first_parm || first_parm->ellipsis_p;
8332 cp_parameter_declarator *parm;
8335 for (parm = first_parm; parm != NULL; parm = parm->next)
8337 tree type = NULL_TREE;
8338 tree init = parm->default_argument;
8342 if (parm == no_parameters)
8345 attrs = parm->decl_specifiers.attributes;
8346 parm->decl_specifiers.attributes = NULL_TREE;
8347 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8348 PARM, init != NULL_TREE, &attrs);
8349 if (! decl || TREE_TYPE (decl) == error_mark_node)
8353 cplus_decl_attributes (&decl, attrs, 0);
8355 type = TREE_TYPE (decl);
8356 if (VOID_TYPE_P (type))
8358 if (same_type_p (type, void_type_node)
8359 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8360 /* this is a parmlist of `(void)', which is ok. */
8362 cxx_incomplete_type_error (decl, type);
8363 /* It's not a good idea to actually create parameters of
8364 type `void'; other parts of the compiler assume that a
8365 void type terminates the parameter list. */
8366 type = error_mark_node;
8367 TREE_TYPE (decl) = error_mark_node;
8370 if (type != error_mark_node)
8372 /* Top-level qualifiers on the parameters are
8373 ignored for function types. */
8374 type = cp_build_qualified_type (type, 0);
8375 if (TREE_CODE (type) == METHOD_TYPE)
8377 error ("parameter `%D' invalidly declared method type", decl);
8378 type = build_pointer_type (type);
8379 TREE_TYPE (decl) = type;
8381 else if (abstract_virtuals_error (decl, type))
8382 any_error = 1; /* Seems like a good idea. */
8383 else if (POINTER_TYPE_P (type))
8385 /* [dcl.fct]/6, parameter types cannot contain pointers
8386 (references) to arrays of unknown bound. */
8387 tree t = TREE_TYPE (type);
8388 int ptr = TYPE_PTR_P (type);
8394 else if (TREE_CODE (t) != ARRAY_TYPE)
8396 else if (!TYPE_DOMAIN (t))
8400 if (TREE_CODE (t) == ARRAY_TYPE)
8401 error ("parameter `%D' includes %s to array of unknown bound `%T'",
8402 decl, ptr ? "pointer" : "reference", t);
8405 if (!any_error && init)
8406 init = check_default_argument (decl, init);
8411 TREE_CHAIN (decl) = decls;
8413 result = tree_cons (init, type, result);
8415 decls = nreverse (decls);
8416 result = nreverse (result);
8418 result = chainon (result, void_list_node);
8425 /* D is a constructor or overloaded `operator='.
8427 Let T be the class in which D is declared. Then, this function
8430 -1 if D's is an ill-formed constructor or copy assignment operator
8431 whose first parameter is of type `T'.
8432 0 if D is not a copy constructor or copy assignment
8434 1 if D is a copy constructor or copy assignment operator whose
8435 first parameter is a reference to const qualified T.
8436 2 if D is a copy constructor or copy assignment operator whose
8437 first parameter is a reference to non-const qualified T.
8439 This function can be used as a predicate. Positive values indicate
8440 a copy constructor and nonzero values indicate a copy assignment
8450 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
8452 if (DECL_TEMPLATE_INFO (d) && is_member_template (DECL_TI_TEMPLATE (d)))
8453 /* Instantiations of template member functions are never copy
8454 functions. Note that member functions of templated classes are
8455 represented as template functions internally, and we must
8456 accept those as copy functions. */
8459 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8463 arg_type = TREE_VALUE (args);
8465 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8467 /* Pass by value copy assignment operator. */
8470 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8471 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8473 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8479 args = TREE_CHAIN (args);
8481 if (args && args != void_list_node && !TREE_PURPOSE (args))
8482 /* There are more non-optional args. */
8488 /* Remember any special properties of member function DECL. */
8490 void grok_special_member_properties (tree decl)
8492 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl))
8493 ; /* Not special. */
8494 else if (DECL_CONSTRUCTOR_P (decl))
8496 int ctor = copy_fn_p (decl);
8502 A non-template constructor for class X is a copy
8503 constructor if its first parameter is of type X&, const
8504 X&, volatile X& or const volatile X&, and either there
8505 are no other parameters or else all other parameters have
8506 default arguments. */
8507 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl)) = 1;
8509 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl)) = 1;
8511 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8512 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl)) = 1;
8514 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8518 A non-template assignment operator for class X is a copy
8519 assignment operator if its parameter is of type X, X&, const
8520 X&, volatile X& or const volatile X&. */
8522 int assop = copy_fn_p (decl);
8526 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8528 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8533 /* Check a constructor DECL has the correct form. Complains
8534 if the class has a constructor of the form X(X). */
8537 grok_ctor_properties (tree ctype, tree decl)
8539 int ctor_parm = copy_fn_p (decl);
8545 A declaration of a constructor for a class X is ill-formed if
8546 its first parameter is of type (optionally cv-qualified) X
8547 and either there are no other parameters or else all other
8548 parameters have default arguments.
8550 We *don't* complain about member template instantiations that
8551 have this form, though; they can occur as we try to decide
8552 what constructor to use during overload resolution. Since
8553 overload resolution will never prefer such a constructor to
8554 the non-template copy constructor (which is either explicitly
8555 or implicitly defined), there's no need to worry about their
8556 existence. Theoretically, they should never even be
8557 instantiated, but that's hard to forestall. */
8558 error ("invalid constructor; you probably meant `%T (const %T&)'",
8566 /* An operator with this code is unary, but can also be binary. */
8569 ambi_op_p (enum tree_code code)
8571 return (code == INDIRECT_REF
8572 || code == ADDR_EXPR
8573 || code == CONVERT_EXPR
8574 || code == NEGATE_EXPR
8575 || code == PREINCREMENT_EXPR
8576 || code == PREDECREMENT_EXPR);
8579 /* An operator with this name can only be unary. */
8582 unary_op_p (enum tree_code code)
8584 return (code == TRUTH_NOT_EXPR
8585 || code == BIT_NOT_EXPR
8586 || code == COMPONENT_REF
8587 || code == TYPE_EXPR);
8590 /* DECL is a declaration for an overloaded operator. Returns true if
8591 the declaration is valid; false otherwise. If COMPLAIN is true,
8592 errors are issued for invalid declarations. */
8595 grok_op_properties (tree decl, int friendp, bool complain)
8597 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
8599 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
8600 tree name = DECL_NAME (decl);
8601 enum tree_code operator_code;
8605 /* Assume that the declaration is valid. */
8608 /* Count the number of arguments. */
8609 for (argtype = argtypes, arity = 0;
8610 argtype && argtype != void_list_node;
8611 argtype = TREE_CHAIN (argtype))
8614 if (current_class_type == NULL_TREE)
8617 if (DECL_CONV_FN_P (decl))
8618 operator_code = TYPE_EXPR;
8622 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8623 if (ansi_opname (CODE) == name) \
8625 operator_code = (CODE); \
8628 else if (ansi_assopname (CODE) == name) \
8630 operator_code = (CODE); \
8631 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8635 #include "operators.def"
8641 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
8642 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8646 switch (operator_code)
8649 TYPE_HAS_NEW_OPERATOR (current_class_type) = 1;
8653 TYPE_GETS_DELETE (current_class_type) |= 1;
8657 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type) = 1;
8660 case VEC_DELETE_EXPR:
8661 TYPE_GETS_DELETE (current_class_type) |= 2;
8669 /* [basic.std.dynamic.allocation]/1:
8671 A program is ill-formed if an allocation function is declared
8672 in a namespace scope other than global scope or declared static
8675 The same also holds true for deallocation functions. */
8676 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
8677 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8679 if (DECL_NAMESPACE_SCOPE_P (decl))
8681 if (CP_DECL_CONTEXT (decl) != global_namespace)
8682 error ("`%D' may not be declared within a namespace", decl);
8683 else if (!TREE_PUBLIC (decl))
8684 error ("`%D' may not be declared as static", decl);
8688 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
8689 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
8690 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8691 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
8694 /* An operator function must either be a non-static member function
8695 or have at least one parameter of a class, a reference to a class,
8696 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8697 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
8699 if (operator_code == TYPE_EXPR
8700 || operator_code == CALL_EXPR
8701 || operator_code == COMPONENT_REF
8702 || operator_code == ARRAY_REF
8703 || operator_code == NOP_EXPR)
8704 error ("`%D' must be a nonstatic member function", decl);
8709 if (DECL_STATIC_FUNCTION_P (decl))
8710 error ("`%D' must be either a non-static member function or a non-member function", decl);
8712 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
8714 tree arg = non_reference (TREE_VALUE (p));
8715 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8716 because these checks are performed even on
8717 template functions. */
8718 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
8722 if (!p || p == void_list_node)
8727 error ("`%D' must have an argument of class or "
8735 /* There are no restrictions on the arguments to an overloaded
8737 if (operator_code == CALL_EXPR)
8740 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
8742 tree t = TREE_TYPE (name);
8745 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
8746 const char *what = 0;
8749 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
8751 if (TREE_CODE (t) == VOID_TYPE)
8753 else if (t == current_class_type)
8754 what = "the same type";
8755 /* Don't force t to be complete here. */
8756 else if (IS_AGGR_TYPE (t)
8757 && COMPLETE_TYPE_P (t)
8758 && DERIVED_FROM_P (t, current_class_type))
8759 what = "a base class";
8761 if (what && warn_conversion)
8762 warning ("conversion to %s%s will never use a type conversion operator",
8763 ref ? "a reference to " : "", what);
8766 if (operator_code == COND_EXPR)
8769 error ("ISO C++ prohibits overloading operator ?:");
8771 else if (ambi_op_p (operator_code))
8774 /* We pick the one-argument operator codes by default, so
8775 we don't have to change anything. */
8777 else if (arity == 2)
8779 /* If we thought this was a unary operator, we now know
8780 it to be a binary operator. */
8781 switch (operator_code)
8784 operator_code = MULT_EXPR;
8788 operator_code = BIT_AND_EXPR;
8792 operator_code = PLUS_EXPR;
8796 operator_code = MINUS_EXPR;
8799 case PREINCREMENT_EXPR:
8800 operator_code = POSTINCREMENT_EXPR;
8803 case PREDECREMENT_EXPR:
8804 operator_code = POSTDECREMENT_EXPR;
8811 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8813 if ((operator_code == POSTINCREMENT_EXPR
8814 || operator_code == POSTDECREMENT_EXPR)
8815 && ! processing_template_decl
8816 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
8819 error ("postfix `%D' must take `int' as its argument",
8823 ("postfix `%D' must take `int' as its second argument",
8830 error ("`%D' must take either zero or one argument", decl);
8832 error ("`%D' must take either one or two arguments", decl);
8835 /* More Effective C++ rule 6. */
8837 && (operator_code == POSTINCREMENT_EXPR
8838 || operator_code == POSTDECREMENT_EXPR
8839 || operator_code == PREINCREMENT_EXPR
8840 || operator_code == PREDECREMENT_EXPR))
8842 tree arg = TREE_VALUE (argtypes);
8843 tree ret = TREE_TYPE (TREE_TYPE (decl));
8844 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
8845 arg = TREE_TYPE (arg);
8846 arg = TYPE_MAIN_VARIANT (arg);
8847 if (operator_code == PREINCREMENT_EXPR
8848 || operator_code == PREDECREMENT_EXPR)
8850 if (TREE_CODE (ret) != REFERENCE_TYPE
8851 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
8853 warning ("prefix `%D' should return `%T'", decl,
8854 build_reference_type (arg));
8858 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
8859 warning ("postfix `%D' should return `%T'", decl, arg);
8863 else if (unary_op_p (operator_code))
8868 error ("`%D' must take `void'", decl);
8870 error ("`%D' must take exactly one argument", decl);
8873 else /* if (binary_op_p (operator_code)) */
8878 error ("`%D' must take exactly one argument", decl);
8880 error ("`%D' must take exactly two arguments", decl);
8883 /* More Effective C++ rule 7. */
8885 && (operator_code == TRUTH_ANDIF_EXPR
8886 || operator_code == TRUTH_ORIF_EXPR
8887 || operator_code == COMPOUND_EXPR))
8888 warning ("user-defined `%D' always evaluates both arguments",
8892 /* Effective C++ rule 23. */
8895 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
8896 && (operator_code == PLUS_EXPR
8897 || operator_code == MINUS_EXPR
8898 || operator_code == TRUNC_DIV_EXPR
8899 || operator_code == MULT_EXPR
8900 || operator_code == TRUNC_MOD_EXPR)
8901 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
8902 warning ("`%D' should return by value", decl);
8905 for (; argtypes && argtypes != void_list_node;
8906 argtypes = TREE_CHAIN (argtypes))
8907 if (TREE_PURPOSE (argtypes))
8909 TREE_PURPOSE (argtypes) = NULL_TREE;
8910 if (operator_code == POSTINCREMENT_EXPR
8911 || operator_code == POSTDECREMENT_EXPR)
8914 pedwarn ("`%D' cannot have default arguments", decl);
8917 error ("`%D' cannot have default arguments", decl);
8926 tag_name (enum tag_types code)
8943 /* Name lookup in an elaborated-type-specifier (after the keyword
8944 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
8945 elaborated-type-specifier is invalid, issue a diagnostic and return
8946 error_mark_node; otherwise, return the *_TYPE to which it referred.
8947 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
8950 check_elaborated_type_specifier (enum tag_types tag_code,
8952 bool allow_template_p)
8958 struct S { struct S *p; };
8960 name lookup will find the TYPE_DECL for the implicit "S::S"
8961 typedef. Adjust for that here. */
8962 if (DECL_SELF_REFERENCE_P (decl))
8963 decl = TYPE_NAME (TREE_TYPE (decl));
8965 type = TREE_TYPE (decl);
8969 If the identifier resolves to a typedef-name or a template
8970 type-parameter, the elaborated-type-specifier is ill-formed.
8972 In other words, the only legitimate declaration to use in the
8973 elaborated type specifier is the implicit typedef created when
8974 the type is declared. */
8975 if (!DECL_IMPLICIT_TYPEDEF_P (decl))
8977 error ("using typedef-name `%D' after `%s'", decl, tag_name (tag_code));
8978 return IS_AGGR_TYPE (type) ? type : error_mark_node;
8981 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8983 error ("using template type parameter `%T' after `%s'",
8984 type, tag_name (tag_code));
8985 return error_mark_node;
8987 else if (TREE_CODE (type) != RECORD_TYPE
8988 && TREE_CODE (type) != UNION_TYPE
8989 && tag_code != enum_type)
8991 error ("`%T' referred to as `%s'", type, tag_name (tag_code));
8992 return error_mark_node;
8994 else if (TREE_CODE (type) != ENUMERAL_TYPE
8995 && tag_code == enum_type)
8997 error ("`%T' referred to as enum", type);
8998 return error_mark_node;
9000 else if (!allow_template_p
9001 && TREE_CODE (type) == RECORD_TYPE
9002 && CLASSTYPE_IS_TEMPLATE (type))
9004 /* If a class template appears as elaborated type specifier
9005 without a template header such as:
9007 template <class T> class C {};
9008 void f(class C); // No template header here
9010 then the required template argument is missing. */
9012 error ("template argument required for `%s %T'",
9013 tag_name (tag_code),
9014 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9015 return error_mark_node;
9021 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9022 Define the tag as a forward-reference if it is not defined.
9024 If a declaration is given, process it here, and report an error if
9025 multiple declarations are not identical.
9027 GLOBALIZE is false when this is also a definition. Only look in
9028 the current frame for the name (since C++ allows new names in any
9031 TEMPLATE_HEADER_P is true when this declaration is preceded by
9032 a set of template parameters. */
9035 xref_tag (enum tag_types tag_code, tree name,
9036 bool globalize, bool template_header_p)
9038 enum tree_code code;
9040 struct cp_binding_level *b = current_binding_level;
9041 tree context = NULL_TREE;
9043 timevar_push (TV_NAME_LOOKUP);
9045 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9057 code = ENUMERAL_TYPE;
9065 /* If we know we are defining this tag, only look it up in
9066 this scope and don't try to find it as a type. */
9067 t = lookup_tag (code, name, b, 1);
9071 tree decl = lookup_name (name, 2);
9073 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9074 decl = DECL_TEMPLATE_RESULT (decl);
9076 if (decl && TREE_CODE (decl) == TYPE_DECL)
9078 /* Two cases we need to consider when deciding if a class
9079 template is allowed as an elaborated type specifier:
9080 1. It is a self reference to its own class.
9081 2. It comes with a template header.
9085 template <class T> class C {
9086 class C *c1; // DECL_SELF_REFERENCE_P is true
9089 template <class U> class C; // template_header_p is true
9090 template <class T> class C<T>::D {
9091 class C *c2; // DECL_SELF_REFERENCE_P is true
9094 t = check_elaborated_type_specifier (tag_code,
9097 | DECL_SELF_REFERENCE_P (decl));
9098 if (t == error_mark_node)
9099 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9104 if (t && current_class_type
9105 && template_class_depth (current_class_type)
9106 && template_header_p)
9108 /* Since GLOBALIZE is nonzero, we are not looking at a
9109 definition of this tag. Since, in addition, we are currently
9110 processing a (member) template declaration of a template
9111 class, we must be very careful; consider:
9118 { template <class V>
9119 friend struct S1; };
9121 Here, the S2::S1 declaration should not be confused with the
9122 outer declaration. In particular, the inner version should
9123 have a template parameter of level 2, not level 1. This
9124 would be particularly important if the member declaration
9127 template <class V = U> friend struct S1;
9129 say, when we should tsubst into `U' when instantiating
9130 S2. On the other hand, when presented with:
9140 we must find the inner binding eventually. We
9141 accomplish this by making sure that the new type we
9142 create to represent this declaration has the right
9144 context = TYPE_CONTEXT (t);
9151 /* If no such tag is yet defined, create a forward-reference node
9152 and record it as the "definition".
9153 When a real declaration of this type is found,
9154 the forward-reference will be altered into a real type. */
9155 if (code == ENUMERAL_TYPE)
9157 error ("use of enum `%#D' without previous declaration", name);
9158 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9162 t = make_aggr_type (code);
9163 TYPE_CONTEXT (t) = context;
9164 pushtag (name, t, globalize);
9169 if (!globalize && processing_template_decl && IS_AGGR_TYPE (t))
9170 redeclare_class_template (t, current_template_parms);
9171 else if (!processing_template_decl
9173 && CLASSTYPE_IS_TEMPLATE (t))
9175 error ("redeclaration of `%T' as a non-template", t);
9176 t = error_mark_node;
9180 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9184 xref_tag_from_type (tree old, tree id, int globalize)
9186 enum tag_types tag_kind;
9188 if (TREE_CODE (old) == RECORD_TYPE)
9189 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9191 tag_kind = union_type;
9193 if (id == NULL_TREE)
9194 id = TYPE_IDENTIFIER (old);
9196 return xref_tag (tag_kind, id, globalize, false);
9199 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9200 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9201 access_* node, and the TREE_VALUE is the type of the base-class.
9202 Non-NULL TREE_TYPE indicates virtual inheritance. */
9205 xref_basetypes (tree ref, tree base_list)
9208 tree binfo, base_binfo;
9209 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9210 unsigned max_bases = 0; /* Maximum direct bases. */
9212 tree default_access;
9213 tree igo_prev; /* Track Inheritance Graph Order. */
9215 if (ref == error_mark_node)
9218 /* The base of a derived class is private by default, all others are
9220 default_access = (TREE_CODE (ref) == RECORD_TYPE
9221 && CLASSTYPE_DECLARED_CLASS (ref)
9222 ? access_private_node : access_public_node);
9224 /* First, make sure that any templates in base-classes are
9225 instantiated. This ensures that if we call ourselves recursively
9226 we do not get confused about which classes are marked and which
9231 tree basetype = TREE_VALUE (*basep);
9233 if (!(processing_template_decl && uses_template_parms (basetype))
9234 && !complete_type_or_else (basetype, NULL))
9235 /* An incomplete type. Remove it from the list. */
9236 *basep = TREE_CHAIN (*basep);
9240 if (TREE_TYPE (*basep))
9242 if (CLASS_TYPE_P (basetype))
9243 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9244 basep = &TREE_CHAIN (*basep);
9248 TYPE_MARKED_P (ref) = 1;
9250 /* The binfo slot should be empty, unless this is an (ill-formed)
9252 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9253 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9255 binfo = make_tree_binfo (max_bases);
9257 TYPE_BINFO (ref) = binfo;
9258 BINFO_OFFSET (binfo) = size_zero_node;
9259 BINFO_TYPE (binfo) = ref;
9263 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, max_bases);
9264 /* An aggregate cannot have baseclasses. */
9265 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9267 if (TREE_CODE (ref) == UNION_TYPE)
9268 error ("derived union `%T' invalid", ref);
9273 if (TYPE_FOR_JAVA (ref))
9274 error ("Java class '%T' cannot have multiple bases", ref);
9279 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, max_vbases);
9281 if (TYPE_FOR_JAVA (ref))
9282 error ("Java class '%T' cannot have virtual bases", ref);
9285 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9287 tree access = TREE_PURPOSE (base_list);
9288 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9289 tree basetype = TREE_VALUE (base_list);
9291 if (access == access_default_node)
9292 access = default_access;
9294 if (TREE_CODE (basetype) == TYPE_DECL)
9295 basetype = TREE_TYPE (basetype);
9296 if (TREE_CODE (basetype) != RECORD_TYPE
9297 && TREE_CODE (basetype) != TYPENAME_TYPE
9298 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9299 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9301 error ("base type `%T' fails to be a struct or class type",
9306 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9307 TYPE_FOR_JAVA (ref) = 1;
9309 base_binfo = NULL_TREE;
9310 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9312 base_binfo = TYPE_BINFO (basetype);
9313 /* The original basetype could have been a typedef'd type. */
9314 basetype = BINFO_TYPE (base_binfo);
9316 /* Inherit flags from the base. */
9317 TYPE_HAS_NEW_OPERATOR (ref)
9318 |= TYPE_HAS_NEW_OPERATOR (basetype);
9319 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9320 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9321 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9322 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9323 CLASSTYPE_DIAMOND_SHAPED_P (ref)
9324 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
9325 CLASSTYPE_REPEATED_BASE_P (ref)
9326 |= CLASSTYPE_REPEATED_BASE_P (basetype);
9329 /* We must do this test after we've seen through a typedef
9331 if (TYPE_MARKED_P (basetype))
9333 if (basetype == ref)
9334 error ("recursive type `%T' undefined", basetype);
9336 error ("duplicate base type `%T' invalid", basetype);
9339 TYPE_MARKED_P (basetype) = 1;
9341 base_binfo = copy_binfo (base_binfo, basetype, ref,
9342 &igo_prev, via_virtual);
9343 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9344 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9346 BINFO_BASE_APPEND (binfo, base_binfo);
9347 BINFO_BASE_ACCESS_APPEND (binfo, access);
9350 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
9351 /* If we have space in the vbase vector, we must have shared at
9352 least one of them, and are therefore diamond shaped. */
9353 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
9355 /* Unmark all the types. */
9356 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
9357 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9358 TYPE_MARKED_P (ref) = 0;
9360 /* Now see if we have a repeated base type. */
9361 if (!CLASSTYPE_REPEATED_BASE_P (ref))
9363 for (base_binfo = binfo; base_binfo;
9364 base_binfo = TREE_CHAIN (base_binfo))
9366 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9368 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
9371 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
9373 for (base_binfo = binfo; base_binfo;
9374 base_binfo = TREE_CHAIN (base_binfo))
9375 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
9376 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
9383 /* Begin compiling the definition of an enumeration type.
9384 NAME is its name (or null if anonymous).
9385 Returns the type object, as yet incomplete.
9386 Also records info about it so that build_enumerator
9387 may be used to declare the individual values as they are read. */
9390 start_enum (tree name)
9392 tree enumtype = NULL_TREE;
9393 struct cp_binding_level *b = current_binding_level;
9395 /* If this is the real definition for a previous forward reference,
9396 fill in the contents in the same object that used to be the
9397 forward reference. */
9399 if (name != NULL_TREE)
9400 enumtype = lookup_tag (ENUMERAL_TYPE, name, b, 1);
9402 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9404 error ("multiple definition of `%#T'", enumtype);
9405 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9406 /* Clear out TYPE_VALUES, and start again. */
9407 TYPE_VALUES (enumtype) = NULL_TREE;
9411 enumtype = make_node (ENUMERAL_TYPE);
9412 pushtag (name, enumtype, 0);
9418 /* After processing and defining all the values of an enumeration type,
9419 install their decls in the enumeration type and finish it off.
9420 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9423 finish_enum (tree enumtype)
9435 integer_type_kind itk;
9436 tree underlying_type = NULL_TREE;
9438 /* We built up the VALUES in reverse order. */
9439 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9441 /* For an enum defined in a template, just set the type of the values;
9442 all further processing is postponed until the template is
9443 instantiated. We need to set the type so that tsubst of a CONST_DECL
9445 if (processing_template_decl)
9447 for (values = TYPE_VALUES (enumtype);
9449 values = TREE_CHAIN (values))
9450 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9451 if (at_function_scope_p ())
9452 add_stmt (build_min (TAG_DEFN, enumtype));
9456 /* Determine the minimum and maximum values of the enumerators. */
9457 if (TYPE_VALUES (enumtype))
9459 minnode = maxnode = NULL_TREE;
9461 for (values = TYPE_VALUES (enumtype);
9463 values = TREE_CHAIN (values))
9465 decl = TREE_VALUE (values);
9467 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9468 each enumerator has the type of its enumeration. Prior to the
9469 closing brace, the type of each enumerator is the type of its
9470 initializing value. */
9471 TREE_TYPE (decl) = enumtype;
9473 /* Update the minimum and maximum values, if appropriate. */
9474 value = DECL_INITIAL (decl);
9475 /* Figure out what the minimum and maximum values of the
9478 minnode = maxnode = value;
9479 else if (tree_int_cst_lt (maxnode, value))
9481 else if (tree_int_cst_lt (value, minnode))
9488 If the enumerator-list is empty, the underlying type is as if
9489 the enumeration had a single enumerator with value 0. */
9490 minnode = maxnode = integer_zero_node;
9492 /* Compute the number of bits require to represent all values of the
9493 enumeration. We must do this before the type of MINNODE and
9494 MAXNODE are transformed, since min_precision relies on the
9495 TREE_TYPE of the value it is passed. */
9496 unsignedp = tree_int_cst_sgn (minnode) >= 0;
9497 lowprec = min_precision (minnode, unsignedp);
9498 highprec = min_precision (maxnode, unsignedp);
9499 precision = MAX (lowprec, highprec);
9501 /* Determine the underlying type of the enumeration.
9505 The underlying type of an enumeration is an integral type that
9506 can represent all the enumerator values defined in the
9507 enumeration. It is implementation-defined which integral type is
9508 used as the underlying type for an enumeration except that the
9509 underlying type shall not be larger than int unless the value of
9510 an enumerator cannot fit in an int or unsigned int.
9512 We use "int" or an "unsigned int" as the underlying type, even if
9513 a smaller integral type would work, unless the user has
9514 explicitly requested that we use the smallest possible type. */
9515 for (itk = (flag_short_enums ? itk_char : itk_int);
9519 underlying_type = integer_types[itk];
9520 if (TYPE_PRECISION (underlying_type) >= precision
9521 && TYPE_UNSIGNED (underlying_type) == unsignedp)
9524 if (itk == itk_none)
9528 IF no integral type can represent all the enumerator values, the
9529 enumeration is ill-formed. */
9530 error ("no integral type can represent all of the enumerator values "
9531 "for `%T'", enumtype);
9532 precision = TYPE_PRECISION (long_long_integer_type_node);
9533 underlying_type = integer_types[itk_unsigned_long_long];
9536 /* Compute the minium and maximum values for the type.
9540 For an enumeration where emin is the smallest enumerator and emax
9541 is the largest, the values of the enumeration are the values of the
9542 underlying type in the range bmin to bmax, where bmin and bmax are,
9543 respectively, the smallest and largest values of the smallest bit-
9544 field that can store emin and emax. */
9546 /* The middle-end currently assumes that types with TYPE_PRECISION
9547 narrower than their underlying type are suitably zero or sign
9548 extended to fill their mode. g++ doesn't make these guarantees.
9549 Until the middle-end can represent such paradoxical types, we
9550 set the TYPE_PRECISION to the width of the underlying type. */
9551 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
9553 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
9557 The value of sizeof() applied to an enumeration type, an object
9558 of an enumeration type, or an enumerator, is the value of sizeof()
9559 applied to the underlying type. */
9560 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
9561 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
9562 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
9563 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
9564 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
9565 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
9567 /* Convert each of the enumerators to the type of the underlying
9568 type of the enumeration. */
9569 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
9571 decl = TREE_VALUE (values);
9572 value = perform_implicit_conversion (underlying_type,
9573 DECL_INITIAL (decl));
9575 /* Do not clobber shared ints. */
9576 value = copy_node (value);
9578 TREE_TYPE (value) = enumtype;
9579 DECL_INITIAL (decl) = value;
9580 TREE_VALUE (values) = value;
9583 /* Fix up all variant types of this enum type. */
9584 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
9586 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
9587 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
9588 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
9589 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
9590 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
9591 TYPE_MODE (t) = TYPE_MODE (enumtype);
9592 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
9593 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
9594 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
9595 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
9598 /* Finish debugging output for this type. */
9599 rest_of_type_compilation (enumtype, namespace_bindings_p ());
9602 /* Build and install a CONST_DECL for an enumeration constant of the
9603 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9604 Assignment of sequential values by default is handled here. */
9607 build_enumerator (tree name, tree value, tree enumtype)
9613 /* Remove no-op casts from the value. */
9615 STRIP_TYPE_NOPS (value);
9617 if (! processing_template_decl)
9619 /* Validate and default VALUE. */
9620 if (value != NULL_TREE)
9622 value = decl_constant_value (value);
9624 if (TREE_CODE (value) == INTEGER_CST)
9626 value = perform_integral_promotions (value);
9627 constant_expression_warning (value);
9631 error ("enumerator value for `%D' not integer constant", name);
9636 /* Default based on previous value. */
9637 if (value == NULL_TREE)
9639 if (TYPE_VALUES (enumtype))
9642 unsigned HOST_WIDE_INT lo;
9646 /* The next value is the previous value plus one. We can
9647 safely assume that the previous value is an INTEGER_CST.
9648 add_double doesn't know the type of the target expression,
9649 so we must check with int_fits_type_p as well. */
9650 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
9651 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
9652 TREE_INT_CST_HIGH (prev_value),
9654 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
9655 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
9658 error ("overflow in enumeration values at `%D'", name);
9661 value = integer_zero_node;
9664 /* Remove no-op casts from the value. */
9665 STRIP_TYPE_NOPS (value);
9668 /* C++ associates enums with global, function, or class declarations. */
9669 context = current_scope ();
9671 context = current_namespace;
9673 /* Build the actual enumeration constant. Note that the enumeration
9674 constants have the type of their initializers until the
9675 enumeration is complete:
9679 Following the closing brace of an enum-specifier, each enumer-
9680 ator has the type of its enumeration. Prior to the closing
9681 brace, the type of each enumerator is the type of its
9684 In finish_enum we will reset the type. Of course, if we're
9685 processing a template, there may be no value. */
9686 type = value ? TREE_TYPE (value) : NULL_TREE;
9688 if (context && context == current_class_type)
9689 /* This enum declaration is local to the class. We need the full
9690 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9691 decl = build_lang_decl (CONST_DECL, name, type);
9693 /* It's a global enum, or it's local to a function. (Note local to
9694 a function could mean local to a class method. */
9695 decl = build_decl (CONST_DECL, name, type);
9697 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
9698 TREE_CONSTANT (decl) = 1;
9699 TREE_INVARIANT (decl) = 1;
9700 TREE_READONLY (decl) = 1;
9701 DECL_INITIAL (decl) = value;
9703 if (context && context == current_class_type)
9704 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9705 on the TYPE_FIELDS list for `S'. (That's so that you can say
9706 things like `S::i' later.) */
9707 finish_member_declaration (decl);
9711 /* Add this enumeration constant to the list for this type. */
9712 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
9716 /* We're defining DECL. Make sure that it's type is OK. */
9719 check_function_type (tree decl, tree current_function_parms)
9721 tree fntype = TREE_TYPE (decl);
9722 tree return_type = complete_type (TREE_TYPE (fntype));
9724 /* In a function definition, arg types must be complete. */
9725 require_complete_types_for_parms (current_function_parms);
9727 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
9729 error ("return type `%#T' is incomplete", TREE_TYPE (fntype));
9731 /* Make it return void instead, but don't change the
9732 type of the DECL_RESULT, in case we have a named return value. */
9733 if (TREE_CODE (fntype) == METHOD_TYPE)
9735 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
9737 = build_method_type_directly (ctype,
9739 FUNCTION_ARG_CHAIN (decl));
9743 = build_function_type (void_type_node,
9744 TYPE_ARG_TYPES (TREE_TYPE (decl)));
9746 = build_exception_variant (fntype,
9747 TYPE_RAISES_EXCEPTIONS (fntype));
9750 abstract_virtuals_error (decl, TREE_TYPE (fntype));
9753 /* Create the FUNCTION_DECL for a function definition.
9754 DECLSPECS and DECLARATOR are the parts of the declaration;
9755 they describe the function's name and the type it returns,
9756 but twisted together in a fashion that parallels the syntax of C.
9758 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9759 DECLARATOR is really the DECL for the function we are about to
9760 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9761 indicating that the function is an inline defined in-class.
9763 This function creates a binding context for the function body
9764 as well as setting up the FUNCTION_DECL in current_function_decl.
9766 For C++, we must first check whether that datum makes any sense.
9767 For example, "class A local_a(1,2);" means that variable local_a
9768 is an aggregate of type A, which should have a constructor
9769 applied to it with the argument list [1, 2]. */
9772 start_preparsed_function (tree decl1, tree attrs, int flags)
9774 tree ctype = NULL_TREE;
9777 int doing_friend = 0;
9778 struct cp_binding_level *bl;
9779 tree current_function_parms;
9780 struct c_fileinfo *finfo = get_fileinfo (lbasename (input_filename));
9783 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
9784 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
9786 fntype = TREE_TYPE (decl1);
9787 if (TREE_CODE (fntype) == METHOD_TYPE)
9788 ctype = TYPE_METHOD_BASETYPE (fntype);
9790 /* ISO C++ 11.4/5. A friend function defined in a class is in
9791 the (lexical) scope of the class in which it is defined. */
9792 if (!ctype && DECL_FRIEND_P (decl1))
9794 ctype = DECL_FRIEND_CONTEXT (decl1);
9796 /* CTYPE could be null here if we're dealing with a template;
9797 for example, `inline friend float foo()' inside a template
9798 will have no CTYPE set. */
9799 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
9805 if (DECL_DECLARED_INLINE_P (decl1)
9806 && lookup_attribute ("noinline", attrs))
9807 warning ("%Jinline function '%D' given attribute noinline", decl1, decl1);
9809 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
9810 /* This is a constructor, we must ensure that any default args
9811 introduced by this definition are propagated to the clones
9812 now. The clones are used directly in overload resolution. */
9813 adjust_clone_args (decl1);
9815 /* Sometimes we don't notice that a function is a static member, and
9816 build a METHOD_TYPE for it. Fix that up now. */
9817 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
9818 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
9820 revert_static_member_fn (decl1);
9824 /* Set up current_class_type, and enter the scope of the class, if
9827 push_nested_class (ctype);
9828 else if (DECL_STATIC_FUNCTION_P (decl1))
9829 push_nested_class (DECL_CONTEXT (decl1));
9831 /* Now that we have entered the scope of the class, we must restore
9832 the bindings for any template parameters surrounding DECL1, if it
9833 is an inline member template. (Order is important; consider the
9834 case where a template parameter has the same name as a field of
9835 the class.) It is not until after this point that
9836 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
9837 if (flags & SF_INCLASS_INLINE)
9838 maybe_begin_member_template_processing (decl1);
9840 /* Effective C++ rule 15. */
9842 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
9843 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
9844 warning ("`operator=' should return a reference to `*this'");
9846 /* Make the init_value nonzero so pushdecl knows this is not tentative.
9847 error_mark_node is replaced below (in poplevel) with the BLOCK. */
9848 if (!DECL_INITIAL (decl1))
9849 DECL_INITIAL (decl1) = error_mark_node;
9851 /* This function exists in static storage.
9852 (This does not mean `static' in the C sense!) */
9853 TREE_STATIC (decl1) = 1;
9855 /* We must call push_template_decl after current_class_type is set
9856 up. (If we are processing inline definitions after exiting a
9857 class scope, current_class_type will be NULL_TREE until set above
9858 by push_nested_class.) */
9859 if (processing_template_decl)
9860 decl1 = push_template_decl (decl1);
9862 /* We are now in the scope of the function being defined. */
9863 current_function_decl = decl1;
9865 /* Save the parm names or decls from this function's declarator
9866 where store_parm_decls will find them. */
9867 current_function_parms = DECL_ARGUMENTS (decl1);
9869 /* Make sure the parameter and return types are reasonable. When
9870 you declare a function, these types can be incomplete, but they
9871 must be complete when you define the function. */
9872 if (! processing_template_decl)
9873 check_function_type (decl1, current_function_parms);
9875 /* Build the return declaration for the function. */
9876 restype = TREE_TYPE (fntype);
9877 /* Promote the value to int before returning it. */
9878 if (c_promoting_integer_type_p (restype))
9879 restype = type_promotes_to (restype);
9880 if (DECL_RESULT (decl1) == NULL_TREE)
9884 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
9885 DECL_ARTIFICIAL (resdecl) = 1;
9886 DECL_IGNORED_P (resdecl) = 1;
9887 DECL_RESULT (decl1) = resdecl;
9889 c_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
9892 /* Initialize RTL machinery. We cannot do this until
9893 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
9894 even when processing a template; this is how we get
9895 CFUN set up, and our per-function variables initialized.
9896 FIXME factor out the non-RTL stuff. */
9897 bl = current_binding_level;
9898 allocate_struct_function (decl1);
9899 current_binding_level = bl;
9901 /* Even though we're inside a function body, we still don't want to
9902 call expand_expr to calculate the size of a variable-sized array.
9903 We haven't necessarily assigned RTL to all variables yet, so it's
9904 not safe to try to expand expressions involving them. */
9905 cfun->x_dont_save_pending_sizes_p = 1;
9907 /* Start the statement-tree, start the tree now. */
9908 DECL_SAVED_TREE (decl1) = push_stmt_list ();
9910 /* Let the user know we're compiling this function. */
9911 announce_function (decl1);
9913 /* Record the decl so that the function name is defined.
9914 If we already have a decl for this name, and it is a FUNCTION_DECL,
9915 use the old decl. */
9916 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
9918 /* A specialization is not used to guide overload resolution. */
9919 if (!DECL_FUNCTION_MEMBER_P (decl1)
9920 && !(DECL_USE_TEMPLATE (decl1) &&
9921 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
9923 tree olddecl = pushdecl (decl1);
9925 if (olddecl == error_mark_node)
9926 /* If something went wrong when registering the declaration,
9927 use DECL1; we have to have a FUNCTION_DECL to use when
9928 parsing the body of the function. */
9931 /* Otherwise, OLDDECL is either a previous declaration of
9932 the same function or DECL1 itself. */
9937 /* We need to set the DECL_CONTEXT. */
9938 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
9939 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
9940 /* And make sure we have enough default args. */
9941 check_default_args (decl1);
9943 fntype = TREE_TYPE (decl1);
9946 /* Determine the ELF visibility attribute for the function. We must
9947 not do this before calling "pushdecl", as we must allow
9948 "duplicate_decls" to merge any attributes appropriately. */
9949 if (!DECL_CLONED_FUNCTION_P (decl1))
9950 determine_visibility (decl1);
9952 /* Reset these in case the call to pushdecl changed them. */
9953 current_function_decl = decl1;
9956 /* If we are (erroneously) defining a function that we have already
9957 defined before, wipe out what we knew before. */
9958 if (!DECL_PENDING_INLINE_P (decl1))
9959 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
9961 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
9963 /* We know that this was set up by `grokclassfn'. We do not
9964 wait until `store_parm_decls', since evil parse errors may
9965 never get us to that point. Here we keep the consistency
9966 between `current_class_type' and `current_class_ptr'. */
9967 tree t = DECL_ARGUMENTS (decl1);
9969 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
9970 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
9972 cp_function_chain->x_current_class_ref
9973 = build_indirect_ref (t, NULL);
9974 cp_function_chain->x_current_class_ptr = t;
9976 /* Constructors and destructors need to know whether they're "in
9977 charge" of initializing virtual base classes. */
9979 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
9981 current_in_charge_parm = t;
9984 if (DECL_HAS_VTT_PARM_P (decl1))
9986 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
9987 current_vtt_parm = t;
9991 if (DECL_INTERFACE_KNOWN (decl1))
9993 tree ctx = decl_function_context (decl1);
9995 if (DECL_NOT_REALLY_EXTERN (decl1))
9996 DECL_EXTERNAL (decl1) = 0;
9998 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
9999 && TREE_PUBLIC (ctx))
10000 /* This is a function in a local class in an extern inline
10002 comdat_linkage (decl1);
10004 /* If this function belongs to an interface, it is public.
10005 If it belongs to someone else's interface, it is also external.
10006 This only affects inlines and template instantiations. */
10007 else if (finfo->interface_unknown == 0
10008 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
10010 if (DECL_DECLARED_INLINE_P (decl1)
10011 || DECL_TEMPLATE_INSTANTIATION (decl1)
10012 || processing_template_decl)
10014 DECL_EXTERNAL (decl1)
10015 = (finfo->interface_only
10016 || (DECL_DECLARED_INLINE_P (decl1)
10017 && ! flag_implement_inlines
10018 && !DECL_VINDEX (decl1)));
10020 /* For WIN32 we also want to put these in linkonce sections. */
10021 maybe_make_one_only (decl1);
10024 DECL_EXTERNAL (decl1) = 0;
10025 DECL_NOT_REALLY_EXTERN (decl1) = 0;
10026 DECL_INTERFACE_KNOWN (decl1) = 1;
10027 /* If this function is in an interface implemented in this file,
10028 make sure that the backend knows to emit this function
10030 if (!DECL_EXTERNAL (decl1))
10031 mark_needed (decl1);
10033 else if (finfo->interface_unknown && finfo->interface_only
10034 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
10036 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10037 interface, we will have both finfo->interface_unknown and
10038 finfo->interface_only set. In that case, we don't want to
10039 use the normal heuristics because someone will supply a
10040 #pragma implementation elsewhere, and deducing it here would
10041 produce a conflict. */
10042 comdat_linkage (decl1);
10043 DECL_EXTERNAL (decl1) = 0;
10044 DECL_INTERFACE_KNOWN (decl1) = 1;
10045 DECL_DEFER_OUTPUT (decl1) = 1;
10049 /* This is a definition, not a reference.
10050 So clear DECL_EXTERNAL. */
10051 DECL_EXTERNAL (decl1) = 0;
10053 if ((DECL_DECLARED_INLINE_P (decl1)
10054 || DECL_TEMPLATE_INSTANTIATION (decl1))
10055 && ! DECL_INTERFACE_KNOWN (decl1)
10056 /* Don't try to defer nested functions for now. */
10057 && ! decl_function_context (decl1))
10058 DECL_DEFER_OUTPUT (decl1) = 1;
10060 DECL_INTERFACE_KNOWN (decl1) = 1;
10063 begin_scope (sk_function_parms, decl1);
10067 if (DECL_DESTRUCTOR_P (decl1)
10068 || (DECL_CONSTRUCTOR_P (decl1)
10069 && targetm.cxx.cdtor_returns_this ()))
10071 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10072 DECL_CONTEXT (cdtor_label) = current_function_decl;
10075 start_fname_decls ();
10077 store_parm_decls (current_function_parms);
10081 /* Like start_preparsed_function, except that instead of a
10082 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10084 Returns 1 on success. If the DECLARATOR is not suitable for a function
10085 (it defines a datum instead), we return 0, which tells
10086 yyparse to report a parse error. */
10089 start_function (cp_decl_specifier_seq *declspecs,
10090 const cp_declarator *declarator,
10095 if (have_extern_spec)
10097 declspecs->storage_class = sc_extern;
10098 /* This should only be done once on the outermost decl. */
10099 have_extern_spec = false;
10102 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10103 /* If the declarator is not suitable for a function definition,
10104 cause a syntax error. */
10105 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10108 /* If #pragma weak was used, mark the decl weak now. */
10109 if (global_scope_p (current_binding_level))
10110 maybe_apply_pragma_weak (decl1);
10112 if (DECL_MAIN_P (decl1))
10113 /* main must return int. grokfndecl should have corrected it
10114 (and issued a diagnostic) if the user got it wrong. */
10115 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10116 integer_type_node));
10118 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10123 /* Store the parameter declarations into the current function declaration.
10124 This is called after parsing the parameter declarations, before
10125 digesting the body of the function.
10127 Also install to binding contour return value identifier, if any. */
10130 store_parm_decls (tree current_function_parms)
10132 tree fndecl = current_function_decl;
10135 /* This is a chain of any other decls that came in among the parm
10136 declarations. If a parm is declared with enum {foo, bar} x;
10137 then CONST_DECLs for foo and bar are put here. */
10138 tree nonparms = NULL_TREE;
10140 if (current_function_parms)
10142 /* This case is when the function was defined with an ANSI prototype.
10143 The parms already have decls, so we need not do anything here
10144 except record them as in effect
10145 and complain if any redundant old-style parm decls were written. */
10147 tree specparms = current_function_parms;
10150 /* Must clear this because it might contain TYPE_DECLs declared
10152 current_binding_level->names = NULL;
10154 /* If we're doing semantic analysis, then we'll call pushdecl
10155 for each of these. We must do them in reverse order so that
10156 they end in the correct forward order. */
10157 specparms = nreverse (specparms);
10159 for (parm = specparms; parm; parm = next)
10161 next = TREE_CHAIN (parm);
10162 if (TREE_CODE (parm) == PARM_DECL)
10164 if (DECL_NAME (parm) == NULL_TREE
10165 || TREE_CODE (parm) != VOID_TYPE)
10168 error ("parameter `%D' declared void", parm);
10172 /* If we find an enum constant or a type tag,
10173 put it aside for the moment. */
10174 TREE_CHAIN (parm) = NULL_TREE;
10175 nonparms = chainon (nonparms, parm);
10179 /* Get the decls in their original chain order and record in the
10180 function. This is all and only the PARM_DECLs that were
10181 pushed into scope by the loop above. */
10182 DECL_ARGUMENTS (fndecl) = getdecls ();
10185 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10187 /* Now store the final chain of decls for the arguments
10188 as the decl-chain of the current lexical scope.
10189 Put the enumerators in as well, at the front so that
10190 DECL_ARGUMENTS is not modified. */
10191 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10193 /* For a cloned function, we've already got all the code we need;
10194 there's no need to add any extra bits. */
10195 if (!DECL_CLONED_FUNCTION_P (fndecl))
10197 /* Do the starting of the exception specifications, if we have any. */
10198 if (flag_exceptions && !processing_template_decl
10199 && flag_enforce_eh_specs
10200 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10201 current_eh_spec_block = begin_eh_spec_block ();
10206 /* We have finished doing semantic analysis on DECL, but have not yet
10207 generated RTL for its body. Save away our current state, so that
10208 when we want to generate RTL later we know what to do. */
10211 save_function_data (tree decl)
10213 struct language_function *f;
10215 /* Save the language-specific per-function data so that we can
10216 get it back when we really expand this function. */
10217 gcc_assert (!DECL_PENDING_INLINE_P (decl));
10220 f = GGC_NEW (struct language_function);
10221 memcpy (f, cp_function_chain, sizeof (struct language_function));
10222 DECL_SAVED_FUNCTION_DATA (decl) = f;
10224 /* Clear out the bits we don't need. */
10225 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10226 f->x_named_label_uses = NULL;
10227 f->bindings = NULL;
10228 f->x_local_names = NULL;
10232 /* Set the return value of the constructor (if present). */
10235 finish_constructor_body (void)
10240 if (targetm.cxx.cdtor_returns_this ())
10242 /* Any return from a constructor will end up here. */
10243 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10245 val = DECL_ARGUMENTS (current_function_decl);
10246 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10247 DECL_RESULT (current_function_decl), val);
10248 /* Return the address of the object. */
10249 exprstmt = build_stmt (RETURN_EXPR, val);
10250 add_stmt (exprstmt);
10254 /* Do all the processing for the beginning of a destructor; set up the
10255 vtable pointers and cleanups for bases and members. */
10258 begin_destructor_body (void)
10261 tree compound_stmt;
10263 /* If the dtor is empty, and we know there is not any possible
10264 way we could use any vtable entries, before they are possibly
10265 set by a base class dtor, we don't have to setup the vtables,
10266 as we know that any base class dtor will set up any vtables
10267 it needs. We avoid MI, because one base class dtor can do a
10268 virtual dispatch to an overridden function that would need to
10269 have a non-related vtable set up, we cannot avoid setting up
10270 vtables in that case. We could change this to see if there
10271 is just one vtable.
10273 ??? In the destructor for a class, the vtables are set
10274 appropriately for that class. There will be no non-related
10275 vtables. jason 2001-12-11. */
10276 if_stmt = begin_if_stmt ();
10278 /* If it is not safe to avoid setting up the vtables, then
10279 someone will change the condition to be boolean_true_node.
10280 (Actually, for now, we do not have code to set the condition
10281 appropriately, so we just assume that we always need to
10282 initialize the vtables.) */
10283 finish_if_stmt_cond (boolean_true_node, if_stmt);
10285 compound_stmt = begin_compound_stmt (0);
10287 /* Make all virtual function table pointers in non-virtual base
10288 classes point to CURRENT_CLASS_TYPE's virtual function
10290 initialize_vtbl_ptrs (current_class_ptr);
10292 finish_compound_stmt (compound_stmt);
10293 finish_then_clause (if_stmt);
10294 finish_if_stmt (if_stmt);
10296 /* And insert cleanups for our bases and members so that they
10297 will be properly destroyed if we throw. */
10298 push_base_cleanups ();
10301 /* At the end of every destructor we generate code to delete the object if
10302 necessary. Do that now. */
10305 finish_destructor_body (void)
10309 /* Any return from a destructor will end up here; that way all base
10310 and member cleanups will be run when the function returns. */
10311 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
10313 /* In a virtual destructor, we must call delete. */
10314 if (DECL_VIRTUAL_P (current_function_decl))
10317 tree virtual_size = cxx_sizeof (current_class_type);
10321 At the point of definition of a virtual destructor (including
10322 an implicit definition), non-placement operator delete shall
10323 be looked up in the scope of the destructor's class and if
10324 found shall be accessible and unambiguous. */
10325 exprstmt = build_op_delete_call
10326 (DELETE_EXPR, current_class_ptr, virtual_size,
10327 /*global_p=*/false, NULL_TREE);
10329 if_stmt = begin_if_stmt ();
10330 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
10331 current_in_charge_parm,
10334 finish_expr_stmt (exprstmt);
10335 finish_then_clause (if_stmt);
10336 finish_if_stmt (if_stmt);
10339 if (targetm.cxx.cdtor_returns_this ())
10343 val = DECL_ARGUMENTS (current_function_decl);
10344 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
10345 DECL_RESULT (current_function_decl), val);
10346 /* Return the address of the object. */
10347 exprstmt = build_stmt (RETURN_EXPR, val);
10348 add_stmt (exprstmt);
10352 /* Do the necessary processing for the beginning of a function body, which
10353 in this case includes member-initializers, but not the catch clauses of
10354 a function-try-block. Currently, this means opening a binding level
10355 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10356 In other functions, this isn't necessary, but it doesn't hurt. */
10359 begin_function_body (void)
10363 if (processing_template_decl)
10364 /* Do nothing now. */;
10366 /* Always keep the BLOCK node associated with the outermost pair of
10367 curly braces of a function. These are needed for correct
10368 operation of dwarfout.c. */
10369 keep_next_level (true);
10371 stmt = begin_compound_stmt (BCS_FN_BODY);
10373 if (processing_template_decl)
10374 /* Do nothing now. */;
10375 else if (DECL_DESTRUCTOR_P (current_function_decl))
10376 begin_destructor_body ();
10381 /* Do the processing for the end of a function body. Currently, this means
10382 closing out the cleanups for fully-constructed bases and members, and in
10383 the case of the destructor, deleting the object if desired. Again, this
10384 is only meaningful for [cd]tors, since they are the only functions where
10385 there is a significant distinction between the main body and any
10386 function catch clauses. Handling, say, main() return semantics here
10387 would be wrong, as flowing off the end of a function catch clause for
10388 main() would also need to return 0. */
10391 finish_function_body (tree compstmt)
10393 /* Close the block. */
10394 finish_compound_stmt (compstmt);
10396 if (processing_template_decl)
10397 /* Do nothing now. */;
10398 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10399 finish_constructor_body ();
10400 else if (DECL_DESTRUCTOR_P (current_function_decl))
10401 finish_destructor_body ();
10404 /* Finish up a function declaration and compile that function
10405 all the way to assembler language output. The free the storage
10406 for the function definition.
10408 FLAGS is a bitwise or of the following values:
10410 We just finished processing the body of an in-class inline
10411 function definition. (This processing will have taken place
10412 after the class definition is complete.) */
10415 finish_function (int flags)
10417 tree fndecl = current_function_decl;
10418 tree fntype, ctype = NULL_TREE;
10419 int inclass_inline = (flags & 2) != 0;
10422 /* When we get some parse errors, we can end up without a
10423 current_function_decl, so cope. */
10424 if (fndecl == NULL_TREE)
10425 return error_mark_node;
10427 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10428 && DECL_VIRTUAL_P (fndecl)
10429 && !processing_template_decl)
10431 tree fnclass = DECL_CONTEXT (fndecl);
10432 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10433 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10436 nested = function_depth > 1;
10437 fntype = TREE_TYPE (fndecl);
10439 /* TREE_READONLY (fndecl) = 1;
10440 This caused &foo to be of type ptr-to-const-function
10441 which then got a warning when stored in a ptr-to-function variable. */
10443 gcc_assert (building_stmt_tree ());
10445 /* For a cloned function, we've already got all the code we need;
10446 there's no need to add any extra bits. */
10447 if (!DECL_CLONED_FUNCTION_P (fndecl))
10449 if (DECL_MAIN_P (current_function_decl))
10451 /* Make it so that `main' always returns 0 by default. */
10453 finish_return_stmt (integer_one_node);
10455 finish_return_stmt (integer_zero_node);
10459 /* Finish dealing with exception specifiers. */
10460 if (flag_exceptions && !processing_template_decl
10461 && flag_enforce_eh_specs
10462 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10463 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10464 (TREE_TYPE (current_function_decl)),
10465 current_eh_spec_block);
10468 /* If we're saving up tree structure, tie off the function now. */
10469 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
10471 finish_fname_decls ();
10473 /* If this function can't throw any exceptions, remember that. */
10474 if (!processing_template_decl
10475 && !cp_function_chain->can_throw
10476 && !flag_non_call_exceptions)
10477 TREE_NOTHROW (fndecl) = 1;
10479 /* This must come after expand_function_end because cleanups might
10480 have declarations (from inline functions) that need to go into
10481 this function's blocks. */
10483 /* If the current binding level isn't the outermost binding level
10484 for this function, either there is a bug, or we have experienced
10485 syntax errors and the statement tree is malformed. */
10486 if (current_binding_level->kind != sk_function_parms)
10488 /* Make sure we have already experienced errors. */
10489 gcc_assert (errorcount);
10491 /* Throw away the broken statement tree and extra binding
10493 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
10495 while (current_binding_level->kind != sk_function_parms)
10497 if (current_binding_level->kind == sk_class)
10498 pop_nested_class ();
10500 poplevel (0, 0, 0);
10503 poplevel (1, 0, 1);
10505 /* Statements should always be full-expressions at the outermost set
10506 of curly braces for a function. */
10507 gcc_assert (stmts_are_full_exprs_p ());
10509 /* Set up the named return value optimization, if we can. Candidate
10510 variables are selected in check_return_value. */
10511 if (current_function_return_value)
10513 tree r = current_function_return_value;
10516 if (r != error_mark_node
10517 /* This is only worth doing for fns that return in memory--and
10518 simpler, since we don't have to worry about promoted modes. */
10519 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
10520 /* Only allow this for variables declared in the outer scope of
10521 the function so we know that their lifetime always ends with a
10522 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10523 we were to do this optimization in tree-ssa. */
10524 && (outer = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl)))
10525 /* Skip the artificial function body block. */
10526 && (outer = BLOCK_SUBBLOCKS (outer))
10527 && chain_member (r, BLOCK_VARS (outer)))
10528 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
10530 current_function_return_value = NULL_TREE;
10533 /* Remember that we were in class scope. */
10534 if (current_class_name)
10535 ctype = current_class_type;
10537 /* Must mark the RESULT_DECL as being in this function. */
10538 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
10540 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10541 to the FUNCTION_DECL node itself. */
10542 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
10544 /* Save away current state, if appropriate. */
10545 if (!processing_template_decl)
10546 save_function_data (fndecl);
10548 /* Complain if there's just no return statement. */
10549 if (warn_return_type
10550 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
10551 && !dependent_type_p (TREE_TYPE (fntype))
10552 && !current_function_returns_value && !current_function_returns_null
10553 /* Don't complain if we abort or throw. */
10554 && !current_function_returns_abnormally
10555 && !DECL_NAME (DECL_RESULT (fndecl))
10556 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10557 inline function, as we might never be compiled separately. */
10558 && (DECL_INLINE (fndecl) || processing_template_decl)
10559 /* Structor return values (if any) are set by the compiler. */
10560 && !DECL_CONSTRUCTOR_P (fndecl)
10561 && !DECL_DESTRUCTOR_P (fndecl))
10562 warning ("no return statement in function returning non-void");
10564 /* Store the end of the function, so that we get good line number
10565 info for the epilogue. */
10566 cfun->function_end_locus = input_location;
10568 /* Genericize before inlining. */
10569 if (!processing_template_decl)
10571 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
10572 cp_genericize (fndecl);
10573 /* Clear out the bits we don't need. */
10574 f->x_current_class_ptr = NULL;
10575 f->x_current_class_ref = NULL;
10576 f->x_eh_spec_block = NULL;
10577 f->x_in_charge_parm = NULL;
10578 f->x_vtt_parm = NULL;
10579 f->x_return_value = NULL;
10580 f->bindings = NULL;
10582 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10583 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
10585 /* Clear out the bits we don't need. */
10586 local_names = NULL;
10587 named_label_uses = NULL;
10589 /* We're leaving the context of this function, so zap cfun. It's still in
10590 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10592 current_function_decl = NULL;
10594 /* If this is an in-class inline definition, we may have to pop the
10595 bindings for the template parameters that we added in
10596 maybe_begin_member_template_processing when start_function was
10598 if (inclass_inline)
10599 maybe_end_member_template_processing ();
10601 /* Leave the scope of the class. */
10603 pop_nested_class ();
10609 /* Let the error reporting routines know that we're outside a
10610 function. For a nested function, this value is used in
10611 cxx_pop_function_context and then reset via pop_function_context. */
10612 current_function_decl = NULL_TREE;
10617 /* Create the FUNCTION_DECL for a function definition.
10618 DECLSPECS and DECLARATOR are the parts of the declaration;
10619 they describe the return type and the name of the function,
10620 but twisted together in a fashion that parallels the syntax of C.
10622 This function creates a binding context for the function body
10623 as well as setting up the FUNCTION_DECL in current_function_decl.
10625 Returns a FUNCTION_DECL on success.
10627 If the DECLARATOR is not suitable for a function (it defines a datum
10628 instead), we return 0, which tells yyparse to report a parse error.
10630 May return void_type_node indicating that this method is actually
10631 a friend. See grokfield for more details.
10633 Came here with a `.pushlevel' .
10635 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10636 CHANGES TO CODE IN `grokfield'. */
10639 start_method (cp_decl_specifier_seq *declspecs,
10640 const cp_declarator *declarator, tree attrlist)
10642 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
10645 if (fndecl == error_mark_node)
10646 return error_mark_node;
10648 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
10650 error ("invalid member function declaration");
10651 return error_mark_node;
10655 cplus_decl_attributes (&fndecl, attrlist, 0);
10657 /* Pass friends other than inline friend functions back. */
10658 if (fndecl == void_type_node)
10661 if (DECL_IN_AGGR_P (fndecl))
10663 if (DECL_CONTEXT (fndecl)
10664 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
10665 error ("`%D' is already defined in class `%T'", fndecl,
10666 DECL_CONTEXT (fndecl));
10667 return void_type_node;
10670 check_template_shadow (fndecl);
10672 DECL_DECLARED_INLINE_P (fndecl) = 1;
10673 if (flag_default_inline)
10674 DECL_INLINE (fndecl) = 1;
10676 /* We process method specializations in finish_struct_1. */
10677 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
10679 fndecl = push_template_decl (fndecl);
10680 if (fndecl == error_mark_node)
10684 if (! DECL_FRIEND_P (fndecl))
10686 if (TREE_CHAIN (fndecl))
10688 fndecl = copy_node (fndecl);
10689 TREE_CHAIN (fndecl) = NULL_TREE;
10691 grok_special_member_properties (fndecl);
10694 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
10696 /* Make a place for the parms. */
10697 begin_scope (sk_function_parms, fndecl);
10699 DECL_IN_AGGR_P (fndecl) = 1;
10703 /* Go through the motions of finishing a function definition.
10704 We don't compile this method until after the whole class has
10707 FINISH_METHOD must return something that looks as though it
10708 came from GROKFIELD (since we are defining a method, after all).
10710 This is called after parsing the body of the function definition.
10711 STMTS is the chain of statements that makes up the function body.
10713 DECL is the ..._DECL that `start_method' provided. */
10716 finish_method (tree decl)
10718 tree fndecl = decl;
10723 if (decl == void_type_node)
10726 old_initial = DECL_INITIAL (fndecl);
10728 /* Undo the level for the parms (from start_method).
10729 This is like poplevel, but it causes nothing to be
10730 saved. Saving information here confuses symbol-table
10731 output routines. Besides, this information will
10732 be correctly output when this method is actually
10735 /* Clear out the meanings of the local variables of this level;
10736 also record in each decl which block it belongs to. */
10738 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
10740 if (DECL_NAME (link) != NULL_TREE)
10741 pop_binding (DECL_NAME (link), link);
10742 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
10743 DECL_CONTEXT (link) = NULL_TREE;
10746 poplevel (0, 0, 0);
10748 DECL_INITIAL (fndecl) = old_initial;
10750 /* We used to check if the context of FNDECL was different from
10751 current_class_type as another way to get inside here. This didn't work
10752 for String.cc in libg++. */
10753 if (DECL_FRIEND_P (fndecl))
10755 VEC_safe_push (tree, CLASSTYPE_INLINE_FRIENDS (current_class_type),
10757 decl = void_type_node;
10764 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10765 we can lay it out later, when and if its type becomes complete. */
10768 maybe_register_incomplete_var (tree var)
10770 gcc_assert (TREE_CODE (var) == VAR_DECL);
10772 /* Keep track of variables with incomplete types. */
10773 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
10774 && DECL_EXTERNAL (var))
10776 tree inner_type = TREE_TYPE (var);
10778 while (TREE_CODE (inner_type) == ARRAY_TYPE)
10779 inner_type = TREE_TYPE (inner_type);
10780 inner_type = TYPE_MAIN_VARIANT (inner_type);
10782 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
10783 /* RTTI TD entries are created while defining the type_info. */
10784 || (TYPE_LANG_SPECIFIC (inner_type)
10785 && TYPE_BEING_DEFINED (inner_type)))
10786 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
10790 /* Called when a class type (given by TYPE) is defined. If there are
10791 any existing VAR_DECLs whose type hsa been completed by this
10792 declaration, update them now. */
10795 complete_vars (tree type)
10797 tree *list = &incomplete_vars;
10799 gcc_assert (CLASS_TYPE_P (type));
10802 if (same_type_p (type, TREE_PURPOSE (*list)))
10804 tree var = TREE_VALUE (*list);
10805 /* Complete the type of the variable. The VAR_DECL itself
10806 will be laid out in expand_expr. */
10807 complete_type (TREE_TYPE (var));
10808 /* Remove this entry from the list. */
10809 *list = TREE_CHAIN (*list);
10812 list = &TREE_CHAIN (*list);
10815 /* Check for pending declarations which may have abstract type. */
10816 complete_type_check_abstract (type);
10819 /* If DECL is of a type which needs a cleanup, build that cleanup
10823 cxx_maybe_build_cleanup (tree decl)
10825 tree type = TREE_TYPE (decl);
10827 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
10829 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
10831 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
10832 && CLASSTYPE_VBASECLASSES (type));
10834 if (TREE_CODE (type) == ARRAY_TYPE)
10838 cxx_mark_addressable (decl);
10839 rval = build_unary_op (ADDR_EXPR, decl, 0);
10842 /* Optimize for space over speed here. */
10843 if (!has_vbases || flag_expensive_optimizations)
10844 flags |= LOOKUP_NONVIRTUAL;
10846 rval = build_delete (TREE_TYPE (rval), rval,
10847 sfk_complete_destructor, flags, 0);
10849 if (has_vbases && !TYPE_HAS_DESTRUCTOR (type))
10850 rval = build_compound_expr (rval, build_vbase_delete (type, decl));
10857 /* When a stmt has been parsed, this function is called. */
10864 /* DECL was originally constructed as a non-static member function,
10865 but turned out to be static. Update it accordingly. */
10868 revert_static_member_fn (tree decl)
10871 tree function = TREE_TYPE (decl);
10872 tree args = TYPE_ARG_TYPES (function);
10874 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
10875 != TYPE_UNQUALIFIED)
10876 error ("static member function `%#D' declared with type qualifiers",
10879 args = TREE_CHAIN (args);
10880 tmp = build_function_type (TREE_TYPE (function), args);
10881 tmp = build_qualified_type (tmp, cp_type_quals (function));
10882 tmp = build_exception_variant (tmp,
10883 TYPE_RAISES_EXCEPTIONS (function));
10884 TREE_TYPE (decl) = tmp;
10885 if (DECL_ARGUMENTS (decl))
10886 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
10887 DECL_STATIC_FUNCTION_P (decl) = 1;
10890 /* Initialize the variables used during compilation of a C++
10894 cxx_push_function_context (struct function * f)
10896 struct language_function *p = GGC_CNEW (struct language_function);
10899 /* Whenever we start a new function, we destroy temporaries in the
10901 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
10907 if (DECL_SAVED_FUNCTION_DATA (fn))
10909 /* If we already parsed this function, and we're just expanding it
10910 now, restore saved state. */
10911 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
10913 /* We don't need the saved data anymore. Unless this is an inline
10914 function; we need the named return value info for
10915 declare_return_variable. */
10916 if (! DECL_INLINE (fn))
10917 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
10922 /* Free the language-specific parts of F, now that we've finished
10923 compiling the function. */
10926 cxx_pop_function_context (struct function * f)
10931 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
10932 one of the language-independent trees. */
10934 enum cp_tree_node_structure_enum
10935 cp_tree_node_structure (union lang_tree_node * t)
10937 switch (TREE_CODE (&t->generic))
10939 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
10940 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
10941 case OVERLOAD: return TS_CP_OVERLOAD;
10942 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
10943 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
10944 case PTRMEM_CST: return TS_CP_PTRMEM;
10945 case BASELINK: return TS_CP_BASELINK;
10946 default: return TS_CP_GENERIC;
10950 /* Build the void_list_node (void_type_node having been created). */
10952 build_void_list_node (void)
10954 tree t = build_tree_list (NULL_TREE, void_type_node);
10959 cp_missing_noreturn_ok_p (tree decl)
10961 /* A missing noreturn is ok for the `main' function. */
10962 return DECL_MAIN_P (decl);
10965 /* Return the COMDAT group into which DECL should be placed. */
10968 cxx_comdat_group (tree decl)
10972 /* Virtual tables, construction virtual tables, and virtual table
10973 tables all go in a single COMDAT group, named after the primary
10975 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
10976 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
10977 /* For all other DECLs, the COMDAT group is the mangled name of the
10978 declaration itself. */
10980 name = DECL_ASSEMBLER_NAME (decl);
10982 return IDENTIFIER_POINTER (name);
10985 #include "gt-cp-decl.h"