1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006 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, 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
53 #include "tree-flow.h"
55 static tree grokparms (cp_parameter_declarator *, tree *);
56 static const char *redeclaration_error_message (tree, tree);
58 static int decl_jump_unsafe (tree);
59 static void require_complete_types_for_parms (tree);
60 static int ambi_op_p (enum tree_code);
61 static int unary_op_p (enum tree_code);
62 static void push_local_name (tree);
63 static tree grok_reference_init (tree, tree, tree, tree *);
64 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
66 static void record_unknown_type (tree, const char *);
67 static tree builtin_function_1 (const char *, tree, tree,
68 enum built_in_function code,
69 enum built_in_class cl, const char *,
71 static tree build_library_fn_1 (tree, enum tree_code, tree);
72 static int member_function_or_else (tree, tree, enum overload_flags);
73 static void bad_specifiers (tree, const char *, int, int, int, int,
75 static void check_for_uninitialized_const_var (tree);
76 static hashval_t typename_hash (const void *);
77 static int typename_compare (const void *, const void *);
78 static tree local_variable_p_walkfn (tree *, int *, void *);
79 static tree record_builtin_java_type (const char *, int);
80 static const char *tag_name (enum tag_types);
81 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
82 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
83 static void maybe_deduce_size_from_array_init (tree, tree);
84 static void layout_var_decl (tree);
85 static void maybe_commonize_var (tree);
86 static tree check_initializer (tree, tree, int, tree *);
87 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
88 static void save_function_data (tree);
89 static void check_function_type (tree, tree);
90 static void finish_constructor_body (void);
91 static void begin_destructor_body (void);
92 static void finish_destructor_body (void);
93 static tree create_array_type_for_decl (tree, tree, tree);
94 static tree get_atexit_node (void);
95 static tree get_dso_handle_node (void);
96 static tree start_cleanup_fn (void);
97 static void end_cleanup_fn (void);
98 static tree cp_make_fname_decl (tree, int);
99 static void initialize_predefined_identifiers (void);
100 static tree check_special_function_return_type
101 (special_function_kind, tree, tree);
102 static tree push_cp_library_fn (enum tree_code, tree);
103 static tree build_cp_library_fn (tree, enum tree_code, tree);
104 static void store_parm_decls (tree);
105 static void initialize_local_var (tree, tree);
106 static void expand_static_init (tree, tree);
107 static tree next_initializable_field (tree);
109 /* The following symbols are subsumed in the cp_global_trees array, and
110 listed here individually for documentation purposes.
113 tree wchar_decl_node;
115 tree vtable_entry_type;
116 tree delta_type_node;
117 tree __t_desc_type_node;
119 tree class_type_node;
120 tree unknown_type_node;
122 Array type `vtable_entry_type[]'
125 tree vtbl_ptr_type_node;
132 A FUNCTION_DECL which can call `abort'. Not necessarily the
133 one that the user will declare, but sufficient to be called
134 by routines that want to abort the program.
138 The FUNCTION_DECL for the default `::operator delete'.
140 tree global_delete_fndecl;
143 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
144 tree tinfo_var_id; */
146 tree cp_global_trees[CPTI_MAX];
148 /* Indicates that there is a type value in some namespace, although
149 that is not necessarily in scope at the moment. */
151 tree global_type_node;
153 /* The node that holds the "name" of the global scope. */
154 tree global_scope_name;
156 #define local_names cp_function_chain->x_local_names
158 /* A list of objects which have constructors or destructors
159 which reside in the global scope. The decl is stored in
160 the TREE_VALUE slot and the initializer is stored
161 in the TREE_PURPOSE slot. */
162 tree static_aggregates;
166 /* A node for the integer constants 2, and 3. */
168 tree integer_two_node, integer_three_node;
170 /* Used only for jumps to as-yet undefined labels, since jumps to
171 defined labels can have their validity checked immediately. */
173 struct named_label_use_entry GTY(())
175 struct named_label_use_entry *next;
176 /* The binding level to which this entry is *currently* attached.
177 This is initially the binding level in which the goto appeared,
178 but is modified as scopes are closed. */
179 struct cp_binding_level *binding_level;
180 /* The head of the names list that was current when the goto appeared,
181 or the inner scope popped. These are the decls that will *not* be
182 skipped when jumping to the label. */
184 /* The location of the goto, for error reporting. */
185 location_t o_goto_locus;
186 /* True if an OpenMP structured block scope has been closed since
187 the goto appeared. This means that the branch from the label will
188 illegally exit an OpenMP scope. */
192 /* A list of all LABEL_DECLs in the function that have names. Here so
193 we can clear out their names' definitions at the end of the
194 function, and so we can check the validity of jumps to these labels. */
196 struct named_label_entry GTY(())
198 /* The decl itself. */
201 /* The binding level to which the label is *currently* attached.
202 This is initially set to the binding level in which the label
203 is defined, but is modified as scopes are closed. */
204 struct cp_binding_level *binding_level;
205 /* The head of the names list that was current when the label was
206 defined, or the inner scope popped. These are the decls that will
207 be skipped when jumping to the label. */
209 /* A tree list of all decls from all binding levels that would be
210 crossed by a backward branch to the label. */
213 /* A list of uses of the label, before the label is defined. */
214 struct named_label_use_entry *uses;
216 /* The following bits are set after the label is defined, and are
217 updated as scopes are popped. They indicate that a backward jump
218 to the label will illegally enter a scope of the given flavor. */
224 #define named_labels cp_function_chain->x_named_labels
226 /* The number of function bodies which we are currently processing.
227 (Zero if we are at namespace scope, one inside the body of a
228 function, two inside the body of a function in a local class, etc.) */
231 /* States indicating how grokdeclarator() should handle declspecs marked
232 with __attribute__((deprecated)). An object declared as
233 __attribute__((deprecated)) suppresses warnings of uses of other
236 enum deprecated_states {
241 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
244 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
245 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
246 time the VAR_DECL was declared, the type was incomplete. */
248 static GTY(()) tree incomplete_vars;
250 /* Returns the kind of template specialization we are currently
251 processing, given that it's declaration contained N_CLASS_SCOPES
252 explicit scope qualifications. */
255 current_tmpl_spec_kind (int n_class_scopes)
257 int n_template_parm_scopes = 0;
258 int seen_specialization_p = 0;
259 int innermost_specialization_p = 0;
260 struct cp_binding_level *b;
262 /* Scan through the template parameter scopes. */
263 for (b = current_binding_level;
264 b->kind == sk_template_parms;
267 /* If we see a specialization scope inside a parameter scope,
268 then something is wrong. That corresponds to a declaration
271 template <class T> template <> ...
273 which is always invalid since [temp.expl.spec] forbids the
274 specialization of a class member template if the enclosing
275 class templates are not explicitly specialized as well. */
276 if (b->explicit_spec_p)
278 if (n_template_parm_scopes == 0)
279 innermost_specialization_p = 1;
281 seen_specialization_p = 1;
283 else if (seen_specialization_p == 1)
284 return tsk_invalid_member_spec;
286 ++n_template_parm_scopes;
289 /* Handle explicit instantiations. */
290 if (processing_explicit_instantiation)
292 if (n_template_parm_scopes != 0)
293 /* We've seen a template parameter list during an explicit
294 instantiation. For example:
296 template <class T> template void f(int);
298 This is erroneous. */
299 return tsk_invalid_expl_inst;
301 return tsk_expl_inst;
304 if (n_template_parm_scopes < n_class_scopes)
305 /* We've not seen enough template headers to match all the
306 specialized classes present. For example:
308 template <class T> void R<T>::S<T>::f(int);
310 This is invalid; there needs to be one set of template
311 parameters for each class. */
312 return tsk_insufficient_parms;
313 else if (n_template_parm_scopes == n_class_scopes)
314 /* We're processing a non-template declaration (even though it may
315 be a member of a template class.) For example:
317 template <class T> void S<T>::f(int);
319 The `class T' maches the `S<T>', leaving no template headers
320 corresponding to the `f'. */
322 else if (n_template_parm_scopes > n_class_scopes + 1)
323 /* We've got too many template headers. For example:
325 template <> template <class T> void f (T);
327 There need to be more enclosing classes. */
328 return tsk_excessive_parms;
330 /* This must be a template. It's of the form:
332 template <class T> template <class U> void S<T>::f(U);
334 This is a specialization if the innermost level was a
335 specialization; otherwise it's just a definition of the
337 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
340 /* Exit the current scope. */
348 /* When a label goes out of scope, check to see if that label was used
349 in a valid manner, and issue any appropriate warnings or errors. */
352 pop_label (tree label, tree old_value)
354 if (!processing_template_decl)
356 if (DECL_INITIAL (label) == NULL_TREE)
360 error ("label %q+D used but not defined", label);
361 #ifdef USE_MAPPED_LOCATION
362 location = input_location; /* FIXME want (input_filename, (line)0) */
364 location.file = input_filename;
367 /* Avoid crashing later. */
368 define_label (location, DECL_NAME (label));
370 else if (!TREE_USED (label))
371 warning (OPT_Wunused_label, "label %q+D defined but not used", label);
374 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
377 /* At the end of a function, all labels declared within the function
378 go out of scope. BLOCK is the top-level block for the
382 pop_labels_1 (void **slot, void *data)
384 struct named_label_entry *ent = (struct named_label_entry *) *slot;
385 tree block = (tree) data;
387 pop_label (ent->label_decl, NULL_TREE);
389 /* Put the labels into the "variables" of the top-level block,
390 so debugger can see them. */
391 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
392 BLOCK_VARS (block) = ent->label_decl;
394 htab_clear_slot (named_labels, slot);
400 pop_labels (tree block)
404 htab_traverse (named_labels, pop_labels_1, block);
409 /* At the end of a block with local labels, restore the outer definition. */
412 pop_local_label (tree label, tree old_value)
414 struct named_label_entry dummy;
417 pop_label (label, old_value);
419 dummy.label_decl = label;
420 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
421 htab_clear_slot (named_labels, slot);
424 /* The following two routines are used to interface to Objective-C++.
425 The binding level is purposely treated as an opaque type. */
428 objc_get_current_scope (void)
430 return current_binding_level;
433 /* The following routine is used by the NeXT-style SJLJ exceptions;
434 variables get marked 'volatile' so as to not be clobbered by
435 _setjmp()/_longjmp() calls. All variables in the current scope,
436 as well as parent scopes up to (but not including) ENCLOSING_BLK
437 shall be thusly marked. */
440 objc_mark_locals_volatile (void *enclosing_blk)
442 struct cp_binding_level *scope;
444 for (scope = current_binding_level;
445 scope && scope != enclosing_blk;
446 scope = scope->level_chain)
450 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
451 objc_volatilize_decl (decl);
453 /* Do not climb up past the current function. */
454 if (scope->kind == sk_function_parms)
459 /* Update data for defined and undefined labels when leaving a scope. */
462 poplevel_named_label_1 (void **slot, void *data)
464 struct named_label_entry *ent = (struct named_label_entry *) *slot;
465 struct cp_binding_level *bl = (struct cp_binding_level *) data;
466 struct cp_binding_level *obl = bl->level_chain;
468 if (ent->binding_level == bl)
472 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
473 if (decl_jump_unsafe (decl))
474 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
476 ent->binding_level = obl;
477 ent->names_in_scope = obl->names;
481 ent->in_try_scope = true;
484 ent->in_catch_scope = true;
487 ent->in_omp_scope = true;
495 struct named_label_use_entry *use;
497 for (use = ent->uses; use ; use = use->next)
498 if (use->binding_level == bl)
500 use->binding_level = obl;
501 use->names_in_scope = obl->names;
502 if (bl->kind == sk_omp)
503 use->in_omp_scope = true;
510 /* Exit a binding level.
511 Pop the level off, and restore the state of the identifier-decl mappings
512 that were in effect when this level was entered.
514 If KEEP == 1, this level had explicit declarations, so
515 and create a "block" (a BLOCK node) for the level
516 to record its declarations and subblocks for symbol table output.
518 If FUNCTIONBODY is nonzero, this level is the body of a function,
519 so create a block as if KEEP were set and also clear out all
522 If REVERSE is nonzero, reverse the order of decls before putting
523 them into the BLOCK. */
526 poplevel (int keep, int reverse, int functionbody)
529 /* The chain of decls was accumulated in reverse order.
530 Put it into forward order, just for cleanliness. */
532 int tmp = functionbody;
533 int real_functionbody;
537 int leaving_for_scope;
540 timevar_push (TV_NAME_LOOKUP);
545 gcc_assert (current_binding_level->kind != sk_class);
547 real_functionbody = (current_binding_level->kind == sk_cleanup
548 ? ((functionbody = 0), tmp) : functionbody);
549 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
551 gcc_assert (!VEC_length(cp_class_binding,
552 current_binding_level->class_shadowed));
554 /* We used to use KEEP == 2 to indicate that the new block should go
555 at the beginning of the list of blocks at this binding level,
556 rather than the end. This hack is no longer used. */
557 gcc_assert (keep == 0 || keep == 1);
559 if (current_binding_level->keep)
562 /* Any uses of undefined labels, and any defined labels, now operate
563 under constraints of next binding contour. */
564 if (cfun && !functionbody && named_labels)
565 htab_traverse (named_labels, poplevel_named_label_1,
566 current_binding_level);
568 /* Get the decls in the order they were written.
569 Usually current_binding_level->names is in reverse order.
570 But parameter decls were previously put in forward order. */
573 current_binding_level->names
574 = decls = nreverse (current_binding_level->names);
576 decls = current_binding_level->names;
578 /* If there were any declarations or structure tags in that level,
579 or if this level is a function body,
580 create a BLOCK to record them for the life of this function. */
582 if (keep == 1 || functionbody)
583 block = make_node (BLOCK);
584 if (block != NULL_TREE)
586 BLOCK_VARS (block) = decls;
587 BLOCK_SUBBLOCKS (block) = subblocks;
590 /* In each subblock, record that this is its superior. */
592 for (link = subblocks; link; link = TREE_CHAIN (link))
593 BLOCK_SUPERCONTEXT (link) = block;
595 /* We still support the old for-scope rules, whereby the variables
596 in a for-init statement were in scope after the for-statement
597 ended. We only use the new rules if flag_new_for_scope is
600 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
602 /* Before we remove the declarations first check for unused variables. */
603 if (warn_unused_variable
604 && !processing_template_decl)
605 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
606 if (TREE_CODE (decl) == VAR_DECL
607 && ! TREE_USED (decl)
608 && ! DECL_IN_SYSTEM_HEADER (decl)
609 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
610 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
612 /* Remove declarations for all the DECLs in this level. */
613 for (link = decls; link; link = TREE_CHAIN (link))
615 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
618 tree name = DECL_NAME (link);
622 ob = outer_binding (name,
623 IDENTIFIER_BINDING (name),
626 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
628 ns_binding = NULL_TREE;
630 if (ob && ob->scope == current_binding_level->level_chain)
631 /* We have something like:
636 and we are leaving the `for' scope. There's no reason to
637 keep the binding of the inner `i' in this case. */
638 pop_binding (name, link);
639 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
640 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
641 /* Here, we have something like:
649 We must pop the for-scope binding so we know what's a
650 type and what isn't. */
651 pop_binding (name, link);
654 /* Mark this VAR_DECL as dead so that we can tell we left it
655 there only for backward compatibility. */
656 DECL_DEAD_FOR_LOCAL (link) = 1;
658 /* Keep track of what should have happened when we
659 popped the binding. */
662 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
663 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
666 /* Add it to the list of dead variables in the next
667 outermost binding to that we can remove these when we
668 leave that binding. */
669 current_binding_level->level_chain->dead_vars_from_for
670 = tree_cons (NULL_TREE, link,
671 current_binding_level->level_chain->
674 /* Although we don't pop the cxx_binding, we do clear
675 its SCOPE since the scope is going away now. */
676 IDENTIFIER_BINDING (name)->scope
677 = current_binding_level->level_chain;
684 /* Remove the binding. */
687 if (TREE_CODE (decl) == TREE_LIST)
688 decl = TREE_VALUE (decl);
691 if (TREE_CODE (name) == OVERLOAD)
692 name = OVL_FUNCTION (name);
694 gcc_assert (DECL_P (name));
695 pop_binding (DECL_NAME (name), decl);
699 /* Remove declarations for any `for' variables from inner scopes
700 that we kept around. */
701 for (link = current_binding_level->dead_vars_from_for;
702 link; link = TREE_CHAIN (link))
703 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
705 /* Restore the IDENTIFIER_TYPE_VALUEs. */
706 for (link = current_binding_level->type_shadowed;
707 link; link = TREE_CHAIN (link))
708 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
710 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
711 for (link = current_binding_level->shadowed_labels;
713 link = TREE_CHAIN (link))
714 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
716 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
717 list if a `using' declaration put them there. The debugging
718 back-ends won't understand OVERLOAD, so we remove them here.
719 Because the BLOCK_VARS are (temporarily) shared with
720 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
721 popped all the bindings. */
726 for (d = &BLOCK_VARS (block); *d; )
728 if (TREE_CODE (*d) == TREE_LIST)
729 *d = TREE_CHAIN (*d);
731 d = &TREE_CHAIN (*d);
735 /* If the level being exited is the top level of a function,
736 check over all the labels. */
739 /* Since this is the top level block of a function, the vars are
740 the function's parameters. Don't leave them in the BLOCK
741 because they are found in the FUNCTION_DECL instead. */
742 BLOCK_VARS (block) = 0;
746 kind = current_binding_level->kind;
747 if (kind == sk_cleanup)
751 /* If this is a temporary binding created for a cleanup, then we'll
752 have pushed a statement list level. Pop that, create a new
753 BIND_EXPR for the block, and insert it into the stream. */
754 stmt = pop_stmt_list (current_binding_level->statement_list);
755 stmt = c_build_bind_expr (block, stmt);
762 /* The current function is being defined, so its DECL_INITIAL
763 should be error_mark_node. */
764 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
765 DECL_INITIAL (current_function_decl) = block;
768 current_binding_level->blocks
769 = chainon (current_binding_level->blocks, block);
771 /* If we did not make a block for the level just exited,
772 any blocks made for inner levels
773 (since they cannot be recorded as subblocks in that level)
774 must be carried forward so they will later become subblocks
775 of something else. */
777 current_binding_level->blocks
778 = chainon (current_binding_level->blocks, subblocks);
780 /* Each and every BLOCK node created here in `poplevel' is important
781 (e.g. for proper debugging information) so if we created one
782 earlier, mark it as "used". */
784 TREE_USED (block) = 1;
786 /* All temporary bindings created for cleanups are popped silently. */
787 if (kind == sk_cleanup)
790 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
793 /* Insert BLOCK at the end of the list of subblocks of the
794 current binding level. This is used when a BIND_EXPR is expanded,
795 to handle the BLOCK node inside the BIND_EXPR. */
798 insert_block (tree block)
800 TREE_USED (block) = 1;
801 current_binding_level->blocks
802 = chainon (current_binding_level->blocks, block);
805 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
806 itself, calling F for each. The DATA is passed to F as well. */
809 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
812 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
814 result |= (*f) (namespace, data);
816 for (; current; current = TREE_CHAIN (current))
817 result |= walk_namespaces_r (current, f, data);
822 /* Walk all the namespaces, calling F for each. The DATA is passed to
826 walk_namespaces (walk_namespaces_fn f, void* data)
828 return walk_namespaces_r (global_namespace, f, data);
831 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
832 DATA is non-NULL, this is the last time we will call
833 wrapup_global_declarations for this NAMESPACE. */
836 wrapup_globals_for_namespace (tree namespace, void* data)
838 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
839 VEC(tree,gc) *statics = level->static_decls;
840 tree *vec = VEC_address (tree, statics);
841 int len = VEC_length (tree, statics);
842 int last_time = (data != 0);
846 check_global_declarations (vec, len);
847 emit_debug_global_declarations (vec, len);
851 /* Write out any globals that need to be output. */
852 return wrapup_global_declarations (vec, len);
856 /* In C++, you don't have to write `struct S' to refer to `S'; you
857 can just use `S'. We accomplish this by creating a TYPE_DECL as
858 if the user had written `typedef struct S S'. Create and return
859 the TYPE_DECL for TYPE. */
862 create_implicit_typedef (tree name, tree type)
866 decl = build_decl (TYPE_DECL, name, type);
867 DECL_ARTIFICIAL (decl) = 1;
868 /* There are other implicit type declarations, like the one *within*
869 a class that allows you to write `S::S'. We must distinguish
871 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
872 TYPE_NAME (type) = decl;
877 /* Remember a local name for name-mangling purposes. */
880 push_local_name (tree decl)
885 timevar_push (TV_NAME_LOOKUP);
887 name = DECL_NAME (decl);
889 nelts = VEC_length (tree, local_names);
890 for (i = 0; i < nelts; i++)
892 t = VEC_index (tree, local_names, i);
893 if (DECL_NAME (t) == name)
895 if (!DECL_LANG_SPECIFIC (decl))
896 retrofit_lang_decl (decl);
897 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
898 if (DECL_LANG_SPECIFIC (t))
899 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
901 DECL_DISCRIMINATOR (decl) = 1;
903 VEC_replace (tree, local_names, i, decl);
904 timevar_pop (TV_NAME_LOOKUP);
909 VEC_safe_push (tree, gc, local_names, decl);
910 timevar_pop (TV_NAME_LOOKUP);
913 /* Subroutine of duplicate_decls: return truthvalue of whether
914 or not types of these decls match.
916 For C++, we must compare the parameter list so that `int' can match
917 `int&' in a parameter position, but `int&' is not confused with
921 decls_match (tree newdecl, tree olddecl)
925 if (newdecl == olddecl)
928 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
929 /* If the two DECLs are not even the same kind of thing, we're not
930 interested in their types. */
933 if (TREE_CODE (newdecl) == FUNCTION_DECL)
935 tree f1 = TREE_TYPE (newdecl);
936 tree f2 = TREE_TYPE (olddecl);
937 tree p1 = TYPE_ARG_TYPES (f1);
938 tree p2 = TYPE_ARG_TYPES (f2);
940 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
941 && ! (DECL_EXTERN_C_P (newdecl)
942 && DECL_EXTERN_C_P (olddecl)))
945 if (TREE_CODE (f1) != TREE_CODE (f2))
948 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
950 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
951 && (DECL_BUILT_IN (olddecl)
952 #ifndef NO_IMPLICIT_EXTERN_C
953 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
954 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
958 types_match = self_promoting_args_p (p1);
959 if (p1 == void_list_node)
960 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
962 #ifndef NO_IMPLICIT_EXTERN_C
963 else if (p1 == NULL_TREE
964 && (DECL_EXTERN_C_P (olddecl)
965 && DECL_IN_SYSTEM_HEADER (olddecl)
966 && !DECL_CLASS_SCOPE_P (olddecl))
967 && (DECL_EXTERN_C_P (newdecl)
968 && DECL_IN_SYSTEM_HEADER (newdecl)
969 && !DECL_CLASS_SCOPE_P (newdecl)))
971 types_match = self_promoting_args_p (p2);
972 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
976 types_match = compparms (p1, p2);
981 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
983 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
984 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
987 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
988 DECL_TEMPLATE_PARMS (olddecl)))
991 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
992 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
993 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
995 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
996 DECL_TEMPLATE_RESULT (newdecl));
1000 /* Need to check scope for variable declaration (VAR_DECL).
1001 For typedef (TYPE_DECL), scope is ignored. */
1002 if (TREE_CODE (newdecl) == VAR_DECL
1003 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1005 Two declarations for an object with C language linkage
1006 with the same name (ignoring the namespace that qualify
1007 it) that appear in different namespace scopes refer to
1009 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1012 if (TREE_TYPE (newdecl) == error_mark_node)
1013 types_match = TREE_TYPE (olddecl) == error_mark_node;
1014 else if (TREE_TYPE (olddecl) == NULL_TREE)
1015 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1016 else if (TREE_TYPE (newdecl) == NULL_TREE)
1019 types_match = comptypes (TREE_TYPE (newdecl),
1020 TREE_TYPE (olddecl),
1021 COMPARE_REDECLARATION);
1027 /* If NEWDECL is `static' and an `extern' was seen previously,
1028 warn about it. OLDDECL is the previous declaration.
1030 Note that this does not apply to the C++ case of declaring
1031 a variable `extern const' and then later `const'.
1033 Don't complain about built-in functions, since they are beyond
1034 the user's control. */
1037 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1041 if (TREE_CODE (newdecl) == TYPE_DECL
1042 || TREE_CODE (newdecl) == TEMPLATE_DECL
1043 || TREE_CODE (newdecl) == CONST_DECL
1044 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1047 /* Don't get confused by static member functions; that's a different
1049 if (TREE_CODE (newdecl) == FUNCTION_DECL
1050 && DECL_STATIC_FUNCTION_P (newdecl))
1053 /* If the old declaration was `static', or the new one isn't, then
1054 then everything is OK. */
1055 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1058 /* It's OK to declare a builtin function as `static'. */
1059 if (TREE_CODE (olddecl) == FUNCTION_DECL
1060 && DECL_ARTIFICIAL (olddecl))
1063 name = DECL_ASSEMBLER_NAME (newdecl);
1064 pedwarn ("%qD was declared %<extern%> and later %<static%>", newdecl);
1065 pedwarn ("previous declaration of %q+D", olddecl);
1068 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1069 function templates. If their exception specifications do not
1070 match, issue an a diagnostic. */
1073 check_redeclaration_exception_specification (tree new_decl,
1078 tree new_exceptions;
1079 tree old_exceptions;
1081 new_type = TREE_TYPE (new_decl);
1082 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1083 old_type = TREE_TYPE (old_decl);
1084 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1088 If any declaration of a function has an exception-specification,
1089 all declarations, including the definition and an explicit
1090 specialization, of that function shall have an
1091 exception-specification with the same set of type-ids. */
1092 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1093 && ! DECL_IS_BUILTIN (old_decl)
1095 && !comp_except_specs (new_exceptions, old_exceptions,
1098 error ("declaration of %qF throws different exceptions", new_decl);
1099 error ("from previous declaration %q+F", old_decl);
1103 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1104 If the redeclaration is invalid, a diagnostic is issued, and the
1105 error_mark_node is returned. Otherwise, OLDDECL is returned.
1107 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1110 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1113 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1115 unsigned olddecl_uid = DECL_UID (olddecl);
1116 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1117 int new_defines_function = 0;
1120 if (newdecl == olddecl)
1123 types_match = decls_match (newdecl, olddecl);
1125 /* If either the type of the new decl or the type of the old decl is an
1126 error_mark_node, then that implies that we have already issued an
1127 error (earlier) for some bogus type specification, and in that case,
1128 it is rather pointless to harass the user with yet more error message
1129 about the same declaration, so just pretend the types match here. */
1130 if (TREE_TYPE (newdecl) == error_mark_node
1131 || TREE_TYPE (olddecl) == error_mark_node)
1132 return error_mark_node;
1134 if (DECL_P (olddecl)
1135 && TREE_CODE (newdecl) == FUNCTION_DECL
1136 && TREE_CODE (olddecl) == FUNCTION_DECL
1137 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1139 if (DECL_DECLARED_INLINE_P (newdecl)
1140 && DECL_UNINLINABLE (newdecl)
1141 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1142 /* Already warned elsewhere. */;
1143 else if (DECL_DECLARED_INLINE_P (olddecl)
1144 && DECL_UNINLINABLE (olddecl)
1145 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1146 /* Already warned. */;
1147 else if (DECL_DECLARED_INLINE_P (newdecl)
1148 && DECL_UNINLINABLE (olddecl)
1149 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1151 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1153 warning (OPT_Wattributes, "previous declaration of %q+D "
1154 "with attribute noinline", olddecl);
1156 else if (DECL_DECLARED_INLINE_P (olddecl)
1157 && DECL_UNINLINABLE (newdecl)
1158 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1160 warning (OPT_Wattributes, "function %q+D redeclared with "
1161 "attribute noinline", newdecl);
1162 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1167 /* Check for redeclaration and other discrepancies. */
1168 if (TREE_CODE (olddecl) == FUNCTION_DECL
1169 && DECL_ARTIFICIAL (olddecl))
1171 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1172 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1174 /* Avoid warnings redeclaring built-ins which have not been
1175 explicitly declared. */
1176 if (DECL_ANTICIPATED (olddecl))
1179 /* If you declare a built-in or predefined function name as static,
1180 the old definition is overridden, but optionally warn this was a
1181 bad choice of name. */
1182 if (! TREE_PUBLIC (newdecl))
1184 warning (OPT_Wshadow, "shadowing %s function %q#D",
1185 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1187 /* Discard the old built-in function. */
1190 /* If the built-in is not ansi, then programs can override
1191 it even globally without an error. */
1192 else if (! DECL_BUILT_IN (olddecl))
1193 warning (0, "library function %q#D redeclared as non-function %q#D",
1197 error ("declaration of %q#D", newdecl);
1198 error ("conflicts with built-in declaration %q#D",
1203 else if (!types_match)
1205 /* Avoid warnings redeclaring built-ins which have not been
1206 explicitly declared. */
1207 if (DECL_ANTICIPATED (olddecl))
1209 /* Deal with fileptr_type_node. FILE type is not known
1210 at the time we create the builtins. */
1213 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1214 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1216 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1219 else if (TREE_VALUE (t2) == fileptr_type_node)
1221 tree t = TREE_VALUE (t1);
1223 if (TREE_CODE (t) == POINTER_TYPE
1224 && TYPE_NAME (TREE_TYPE (t))
1225 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1226 == get_identifier ("FILE")
1227 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1229 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1231 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1232 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1233 types_match = decls_match (newdecl, olddecl);
1235 return duplicate_decls (newdecl, olddecl,
1237 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1240 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1243 else if ((DECL_EXTERN_C_P (newdecl)
1244 && DECL_EXTERN_C_P (olddecl))
1245 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1246 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1248 /* A near match; override the builtin. */
1250 if (TREE_PUBLIC (newdecl))
1252 warning (0, "new declaration %q#D", newdecl);
1253 warning (0, "ambiguates built-in declaration %q#D",
1257 warning (OPT_Wshadow, "shadowing %s function %q#D",
1258 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1262 /* Discard the old built-in function. */
1265 /* Replace the old RTL to avoid problems with inlining. */
1266 COPY_DECL_RTL (newdecl, olddecl);
1268 /* Even if the types match, prefer the new declarations type for
1269 built-ins which have not been explicitly declared, for
1270 exception lists, etc... */
1271 else if (DECL_ANTICIPATED (olddecl))
1273 tree type = TREE_TYPE (newdecl);
1274 tree attribs = (*targetm.merge_type_attributes)
1275 (TREE_TYPE (olddecl), type);
1277 type = cp_build_type_attribute_variant (type, attribs);
1278 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1281 /* Whether or not the builtin can throw exceptions has no
1282 bearing on this declarator. */
1283 TREE_NOTHROW (olddecl) = 0;
1285 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1287 /* If a builtin function is redeclared as `static', merge
1288 the declarations, but make the original one static. */
1289 DECL_THIS_STATIC (olddecl) = 1;
1290 TREE_PUBLIC (olddecl) = 0;
1292 /* Make the old declaration consistent with the new one so
1293 that all remnants of the builtin-ness of this function
1294 will be banished. */
1295 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1296 COPY_DECL_RTL (newdecl, olddecl);
1299 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1301 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1302 && TREE_CODE (newdecl) != TYPE_DECL
1303 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1304 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1305 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1306 && TREE_CODE (olddecl) != TYPE_DECL
1307 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1308 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1311 /* We do nothing special here, because C++ does such nasty
1312 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1313 get shadowed, and know that if we need to find a TYPE_DECL
1314 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1315 slot of the identifier. */
1319 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1320 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1321 || (TREE_CODE (olddecl) == FUNCTION_DECL
1322 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1325 error ("%q#D redeclared as different kind of symbol", newdecl);
1326 if (TREE_CODE (olddecl) == TREE_LIST)
1327 olddecl = TREE_VALUE (olddecl);
1328 error ("previous declaration of %q+#D", olddecl);
1330 return error_mark_node;
1332 else if (!types_match)
1334 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1335 /* These are certainly not duplicate declarations; they're
1336 from different scopes. */
1339 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1341 /* The name of a class template may not be declared to refer to
1342 any other template, class, function, object, namespace, value,
1343 or type in the same scope. */
1344 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1345 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1347 error ("declaration of template %q#D", newdecl);
1348 error ("conflicts with previous declaration %q+#D", olddecl);
1350 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1351 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1352 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1353 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1354 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1355 DECL_TEMPLATE_PARMS (olddecl))
1356 /* Template functions can be disambiguated by
1358 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1359 TREE_TYPE (TREE_TYPE (olddecl))))
1361 error ("new declaration %q#D", newdecl);
1362 error ("ambiguates old declaration %q+#D", olddecl);
1366 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1368 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1370 error ("declaration of C function %q#D conflicts with",
1372 error ("previous declaration %q+#D here", olddecl);
1374 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1375 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1377 error ("new declaration %q#D", newdecl);
1378 error ("ambiguates old declaration %q+#D", olddecl);
1379 return error_mark_node;
1386 error ("conflicting declaration %q#D", newdecl);
1387 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1388 return error_mark_node;
1391 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1392 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1393 && (!DECL_TEMPLATE_INFO (newdecl)
1394 || (DECL_TI_TEMPLATE (newdecl)
1395 != DECL_TI_TEMPLATE (olddecl))))
1396 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1397 && (!DECL_TEMPLATE_INFO (olddecl)
1398 || (DECL_TI_TEMPLATE (olddecl)
1399 != DECL_TI_TEMPLATE (newdecl))))))
1400 /* It's OK to have a template specialization and a non-template
1401 with the same type, or to have specializations of two
1402 different templates with the same type. Note that if one is a
1403 specialization, and the other is an instantiation of the same
1404 template, that we do not exit at this point. That situation
1405 can occur if we instantiate a template class, and then
1406 specialize one of its methods. This situation is valid, but
1407 the declarations must be merged in the usual way. */
1409 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1410 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1411 && !DECL_USE_TEMPLATE (newdecl))
1412 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1413 && !DECL_USE_TEMPLATE (olddecl))))
1414 /* One of the declarations is a template instantiation, and the
1415 other is not a template at all. That's OK. */
1417 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1419 /* In [namespace.alias] we have:
1421 In a declarative region, a namespace-alias-definition can be
1422 used to redefine a namespace-alias declared in that declarative
1423 region to refer only to the namespace to which it already
1426 Therefore, if we encounter a second alias directive for the same
1427 alias, we can just ignore the second directive. */
1428 if (DECL_NAMESPACE_ALIAS (newdecl)
1429 && (DECL_NAMESPACE_ALIAS (newdecl)
1430 == DECL_NAMESPACE_ALIAS (olddecl)))
1432 /* [namespace.alias]
1434 A namespace-name or namespace-alias shall not be declared as
1435 the name of any other entity in the same declarative region.
1436 A namespace-name defined at global scope shall not be
1437 declared as the name of any other entity in any global scope
1439 error ("declaration of namespace %qD conflicts with", newdecl);
1440 error ("previous declaration of namespace %q+D here", olddecl);
1441 return error_mark_node;
1445 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1448 error (errmsg, newdecl);
1449 if (DECL_NAME (olddecl) != NULL_TREE)
1450 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1451 ? "%q+#D previously defined here"
1452 : "%q+#D previously declared here", olddecl);
1453 return error_mark_node;
1455 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1456 && DECL_INITIAL (olddecl) != NULL_TREE
1457 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1458 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1460 /* Prototype decl follows defn w/o prototype. */
1461 warning (0, "prototype for %q+#D", newdecl);
1462 warning (0, "%Jfollows non-prototype definition here", olddecl);
1464 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1465 || TREE_CODE (olddecl) == VAR_DECL)
1466 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1469 If two declarations of the same function or object
1470 specify different linkage-specifications ..., the program
1471 is ill-formed.... Except for functions with C++ linkage,
1472 a function declaration without a linkage specification
1473 shall not precede the first linkage specification for
1474 that function. A function can be declared without a
1475 linkage specification after an explicit linkage
1476 specification has been seen; the linkage explicitly
1477 specified in the earlier declaration is not affected by
1478 such a function declaration.
1480 DR 563 raises the question why the restrictions on
1481 functions should not also apply to objects. Older
1482 versions of G++ silently ignore the linkage-specification
1490 which is clearly wrong. Therefore, we now treat objects
1492 if (current_lang_depth () == 0)
1494 /* There is no explicit linkage-specification, so we use
1495 the linkage from the previous declaration. */
1496 if (!DECL_LANG_SPECIFIC (newdecl))
1497 retrofit_lang_decl (newdecl);
1498 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1502 error ("previous declaration of %q+#D with %qL linkage",
1503 olddecl, DECL_LANGUAGE (olddecl));
1504 error ("conflicts with new declaration with %qL linkage",
1505 DECL_LANGUAGE (newdecl));
1509 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1511 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1513 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1514 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1517 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1518 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1520 for (; t1 && t1 != void_list_node;
1521 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1522 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1524 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1527 pedwarn ("default argument given for parameter %d of %q#D",
1529 pedwarn ("after previous specification in %q+#D", olddecl);
1533 error ("default argument given for parameter %d of %q#D",
1535 error ("after previous specification in %q+#D",
1540 if (DECL_DECLARED_INLINE_P (newdecl)
1541 && ! DECL_DECLARED_INLINE_P (olddecl)
1542 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1544 warning (0, "%q#D was used before it was declared inline", newdecl);
1545 warning (0, "%Jprevious non-inline declaration here", olddecl);
1550 /* Do not merge an implicit typedef with an explicit one. In:
1554 typedef class A A __attribute__ ((foo));
1556 the attribute should apply only to the typedef. */
1557 if (TREE_CODE (olddecl) == TYPE_DECL
1558 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1559 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1562 /* If new decl is `static' and an `extern' was seen previously,
1564 warn_extern_redeclared_static (newdecl, olddecl);
1566 /* We have committed to returning 1 at this point. */
1567 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1569 /* Now that functions must hold information normally held
1570 by field decls, there is extra work to do so that
1571 declaration information does not get destroyed during
1573 if (DECL_VINDEX (olddecl))
1574 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1575 if (DECL_CONTEXT (olddecl))
1576 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1577 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1578 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1579 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1580 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1581 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1582 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1583 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1584 SET_OVERLOADED_OPERATOR_CODE
1585 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1586 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1588 /* Optionally warn about more than one declaration for the same
1589 name, but don't warn about a function declaration followed by a
1591 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1592 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1593 /* Don't warn about extern decl followed by definition. */
1594 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1595 /* Don't warn about friends, let add_friend take care of it. */
1596 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1598 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1599 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1603 /* Deal with C++: must preserve virtual function table size. */
1604 if (TREE_CODE (olddecl) == TYPE_DECL)
1606 tree newtype = TREE_TYPE (newdecl);
1607 tree oldtype = TREE_TYPE (olddecl);
1609 if (newtype != error_mark_node && oldtype != error_mark_node
1610 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1611 CLASSTYPE_FRIEND_CLASSES (newtype)
1612 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1614 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1617 /* Copy all the DECL_... slots specified in the new decl
1618 except for any that we copy here from the old type. */
1619 DECL_ATTRIBUTES (newdecl)
1620 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1622 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1626 old_result = DECL_TEMPLATE_RESULT (olddecl);
1627 new_result = DECL_TEMPLATE_RESULT (newdecl);
1628 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1629 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1630 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1631 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1633 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1635 DECL_INLINE (old_result)
1636 |= DECL_INLINE (new_result);
1637 DECL_DECLARED_INLINE_P (old_result)
1638 |= DECL_DECLARED_INLINE_P (new_result);
1639 check_redeclaration_exception_specification (newdecl, olddecl);
1642 /* If the new declaration is a definition, update the file and
1643 line information on the declaration, and also make
1644 the old declaration the same definition. */
1645 if (DECL_INITIAL (old_result) == NULL_TREE
1646 && DECL_INITIAL (new_result) != NULL_TREE)
1648 DECL_SOURCE_LOCATION (olddecl)
1649 = DECL_SOURCE_LOCATION (old_result)
1650 = DECL_SOURCE_LOCATION (newdecl);
1651 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1652 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1653 DECL_ARGUMENTS (old_result)
1654 = DECL_ARGUMENTS (new_result);
1662 /* Automatically handles default parameters. */
1663 tree oldtype = TREE_TYPE (olddecl);
1666 /* Merge the data types specified in the two decls. */
1667 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1669 /* If merge_types produces a non-typedef type, just use the old type. */
1670 if (TREE_CODE (newdecl) == TYPE_DECL
1671 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1674 if (TREE_CODE (newdecl) == VAR_DECL)
1676 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1677 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1678 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1679 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1680 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1681 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1683 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1684 if (DECL_LANG_SPECIFIC (olddecl)
1685 && CP_DECL_THREADPRIVATE_P (olddecl))
1687 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1688 if (!DECL_LANG_SPECIFIC (newdecl))
1689 retrofit_lang_decl (newdecl);
1691 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1692 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1696 /* Do this after calling `merge_types' so that default
1697 parameters don't confuse us. */
1698 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1699 check_redeclaration_exception_specification (newdecl, olddecl);
1700 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1702 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1703 check_default_args (newdecl);
1705 /* Lay the type out, unless already done. */
1706 if (! same_type_p (newtype, oldtype)
1707 && TREE_TYPE (newdecl) != error_mark_node
1708 && !(processing_template_decl && uses_template_parms (newdecl)))
1709 layout_type (TREE_TYPE (newdecl));
1711 if ((TREE_CODE (newdecl) == VAR_DECL
1712 || TREE_CODE (newdecl) == PARM_DECL
1713 || TREE_CODE (newdecl) == RESULT_DECL
1714 || TREE_CODE (newdecl) == FIELD_DECL
1715 || TREE_CODE (newdecl) == TYPE_DECL)
1716 && !(processing_template_decl && uses_template_parms (newdecl)))
1717 layout_decl (newdecl, 0);
1719 /* Merge the type qualifiers. */
1720 if (TREE_READONLY (newdecl))
1721 TREE_READONLY (olddecl) = 1;
1722 if (TREE_THIS_VOLATILE (newdecl))
1723 TREE_THIS_VOLATILE (olddecl) = 1;
1724 if (TREE_NOTHROW (newdecl))
1725 TREE_NOTHROW (olddecl) = 1;
1727 /* Merge deprecatedness. */
1728 if (TREE_DEPRECATED (newdecl))
1729 TREE_DEPRECATED (olddecl) = 1;
1731 /* Merge the initialization information. */
1732 if (DECL_INITIAL (newdecl) == NULL_TREE
1733 && DECL_INITIAL (olddecl) != NULL_TREE)
1735 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1736 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1737 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1738 && DECL_LANG_SPECIFIC (newdecl)
1739 && DECL_LANG_SPECIFIC (olddecl))
1741 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1742 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1746 /* Merge the section attribute.
1747 We want to issue an error if the sections conflict but that must be
1748 done later in decl_attributes since we are called before attributes
1750 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1751 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1753 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1755 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1756 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1757 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1758 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1759 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1760 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1761 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1762 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1763 /* Keep the old RTL. */
1764 COPY_DECL_RTL (olddecl, newdecl);
1766 else if (TREE_CODE (newdecl) == VAR_DECL
1767 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1769 /* Keep the old RTL. We cannot keep the old RTL if the old
1770 declaration was for an incomplete object and the new
1771 declaration is not since many attributes of the RTL will
1773 COPY_DECL_RTL (olddecl, newdecl);
1776 /* If cannot merge, then use the new type and qualifiers,
1777 and don't preserve the old rtl. */
1780 /* Clean out any memory we had of the old declaration. */
1781 tree oldstatic = value_member (olddecl, static_aggregates);
1783 TREE_VALUE (oldstatic) = error_mark_node;
1785 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1786 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1787 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1788 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1791 /* Merge the storage class information. */
1792 merge_weak (newdecl, olddecl);
1794 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1795 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1796 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1797 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1798 if (! DECL_EXTERNAL (olddecl))
1799 DECL_EXTERNAL (newdecl) = 0;
1801 new_template = NULL_TREE;
1802 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1804 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1805 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1806 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1807 DECL_TEMPLATE_INSTANTIATED (newdecl)
1808 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1810 /* If the OLDDECL is an instantiation and/or specialization,
1811 then the NEWDECL must be too. But, it may not yet be marked
1812 as such if the caller has created NEWDECL, but has not yet
1813 figured out that it is a redeclaration. */
1814 if (!DECL_USE_TEMPLATE (newdecl))
1815 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1817 /* Don't really know how much of the language-specific
1818 values we should copy from old to new. */
1819 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1820 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1821 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1822 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1823 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1824 if (DECL_TEMPLATE_INFO (newdecl))
1825 new_template = DECL_TI_TEMPLATE (newdecl);
1826 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1827 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1828 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1829 olddecl_friend = DECL_FRIEND_P (olddecl);
1830 hidden_friend = (DECL_ANTICIPATED (olddecl)
1831 && DECL_HIDDEN_FRIEND_P (olddecl)
1832 && newdecl_is_friend);
1834 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1835 if (TREE_CODE (newdecl) == FUNCTION_DECL
1836 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1838 DECL_BEFRIENDING_CLASSES (newdecl)
1839 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1840 DECL_BEFRIENDING_CLASSES (olddecl));
1841 /* DECL_THUNKS is only valid for virtual functions,
1842 otherwise it is a DECL_FRIEND_CONTEXT. */
1843 if (DECL_VIRTUAL_P (newdecl))
1844 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1848 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1850 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1851 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1853 /* If newdecl is not a specialization, then it is not a
1854 template-related function at all. And that means that we
1855 should have exited above, returning 0. */
1856 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1858 if (TREE_USED (olddecl))
1859 /* From [temp.expl.spec]:
1861 If a template, a member template or the member of a class
1862 template is explicitly specialized then that
1863 specialization shall be declared before the first use of
1864 that specialization that would cause an implicit
1865 instantiation to take place, in every translation unit in
1866 which such a use occurs. */
1867 error ("explicit specialization of %qD after first use",
1870 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1872 /* Don't propagate visibility from the template to the
1873 specialization here. We'll do that in determine_visibility if
1875 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1877 /* [temp.expl.spec/14] We don't inline explicit specialization
1878 just because the primary template says so. */
1882 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1883 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1885 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1887 /* If either decl says `inline', this fn is inline, unless
1888 its definition was passed already. */
1889 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1890 DECL_INLINE (olddecl) = 1;
1891 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1893 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1894 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1897 /* Preserve abstractness on cloned [cd]tors. */
1898 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1902 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1903 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1904 COPY_DECL_RTL (newdecl, olddecl);
1906 if (! types_match || new_defines_function)
1908 /* These need to be copied so that the names are available.
1909 Note that if the types do match, we'll preserve inline
1910 info and other bits, but if not, we won't. */
1911 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1912 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1914 if (new_defines_function)
1915 /* If defining a function declared with other language
1916 linkage, use the previously declared language linkage. */
1917 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1918 else if (types_match)
1920 /* If redeclaring a builtin function, and not a definition,
1921 it stays built in. */
1922 if (DECL_BUILT_IN (olddecl))
1924 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1925 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1926 /* If we're keeping the built-in definition, keep the rtl,
1927 regardless of declaration matches. */
1928 COPY_DECL_RTL (olddecl, newdecl);
1931 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1932 /* Don't clear out the arguments if we're redefining a function. */
1933 if (DECL_ARGUMENTS (olddecl))
1934 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1937 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1938 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1940 /* Now preserve various other info from the definition. */
1941 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1942 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1943 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1944 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1946 /* Warn about conflicting visibility specifications. */
1947 if (DECL_VISIBILITY_SPECIFIED (olddecl)
1948 && DECL_VISIBILITY_SPECIFIED (newdecl)
1949 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1951 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
1952 "because it", newdecl);
1953 warning (OPT_Wattributes, "%Jconflicts with previous "
1954 "declaration here", olddecl);
1956 /* Choose the declaration which specified visibility. */
1957 if (DECL_VISIBILITY_SPECIFIED (olddecl))
1959 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1960 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
1962 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
1963 so keep this behavior. */
1964 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
1966 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
1967 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
1970 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
1971 with that from NEWDECL below. */
1972 if (DECL_LANG_SPECIFIC (olddecl))
1974 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
1975 != DECL_LANG_SPECIFIC (newdecl));
1976 ggc_free (DECL_LANG_SPECIFIC (olddecl));
1979 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1983 function_size = sizeof (struct tree_decl_common);
1985 memcpy ((char *) olddecl + sizeof (struct tree_common),
1986 (char *) newdecl + sizeof (struct tree_common),
1987 function_size - sizeof (struct tree_common));
1989 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
1990 (char *) newdecl + sizeof (struct tree_decl_common),
1991 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
1993 /* If newdecl is a template instantiation, it is possible that
1994 the following sequence of events has occurred:
1996 o A friend function was declared in a class template. The
1997 class template was instantiated.
1999 o The instantiation of the friend declaration was
2000 recorded on the instantiation list, and is newdecl.
2002 o Later, however, instantiate_class_template called pushdecl
2003 on the newdecl to perform name injection. But, pushdecl in
2004 turn called duplicate_decls when it discovered that another
2005 declaration of a global function with the same name already
2008 o Here, in duplicate_decls, we decided to clobber newdecl.
2010 If we're going to do that, we'd better make sure that
2011 olddecl, and not newdecl, is on the list of
2012 instantiations so that if we try to do the instantiation
2013 again we won't get the clobbered declaration. */
2014 reregister_specialization (newdecl,
2020 size_t size = tree_code_size (TREE_CODE (olddecl));
2021 memcpy ((char *) olddecl + sizeof (struct tree_common),
2022 (char *) newdecl + sizeof (struct tree_common),
2023 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2024 switch (TREE_CODE (olddecl))
2034 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2035 (char *) newdecl + sizeof (struct tree_decl_common),
2036 size - sizeof (struct tree_decl_common)
2037 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2041 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2042 (char *) newdecl + sizeof (struct tree_decl_common),
2043 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2044 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2048 DECL_UID (olddecl) = olddecl_uid;
2050 DECL_FRIEND_P (olddecl) = 1;
2053 DECL_ANTICIPATED (olddecl) = 1;
2054 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2057 /* NEWDECL contains the merged attribute lists.
2058 Update OLDDECL to be the same. */
2059 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2061 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2062 so that encode_section_info has a chance to look at the new decl
2063 flags and attributes. */
2064 if (DECL_RTL_SET_P (olddecl)
2065 && (TREE_CODE (olddecl) == FUNCTION_DECL
2066 || (TREE_CODE (olddecl) == VAR_DECL
2067 && TREE_STATIC (olddecl))))
2068 make_decl_rtl (olddecl);
2070 /* The NEWDECL will no longer be needed. Because every out-of-class
2071 declaration of a member results in a call to duplicate_decls,
2072 freeing these nodes represents in a significant savings. */
2078 /* Return zero if the declaration NEWDECL is valid
2079 when the declaration OLDDECL (assumed to be for the same name)
2080 has already been seen.
2081 Otherwise return an error message format string with a %s
2082 where the identifier should go. */
2085 redeclaration_error_message (tree newdecl, tree olddecl)
2087 if (TREE_CODE (newdecl) == TYPE_DECL)
2089 /* Because C++ can put things into name space for free,
2090 constructs like "typedef struct foo { ... } foo"
2091 would look like an erroneous redeclaration. */
2092 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2095 return "redefinition of %q#D";
2097 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2099 /* If this is a pure function, its olddecl will actually be
2100 the original initialization to `0' (which we force to call
2101 abort()). Don't complain about redefinition in this case. */
2102 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2103 && DECL_INITIAL (olddecl) == NULL_TREE)
2106 /* If both functions come from different namespaces, this is not
2107 a redeclaration - this is a conflict with a used function. */
2108 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2109 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2110 && ! decls_match (olddecl, newdecl))
2111 return "%qD conflicts with used function";
2113 /* We'll complain about linkage mismatches in
2114 warn_extern_redeclared_static. */
2116 /* Defining the same name twice is no good. */
2117 if (DECL_INITIAL (olddecl) != NULL_TREE
2118 && DECL_INITIAL (newdecl) != NULL_TREE)
2120 if (DECL_NAME (olddecl) == NULL_TREE)
2121 return "%q#D not declared in class";
2123 return "redefinition of %q#D";
2127 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2131 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2133 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2134 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2135 return "redefinition of %q#D";
2139 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2140 || (DECL_TEMPLATE_RESULT (newdecl)
2141 == DECL_TEMPLATE_RESULT (olddecl)))
2144 nt = DECL_TEMPLATE_RESULT (newdecl);
2145 if (DECL_TEMPLATE_INFO (nt))
2146 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2147 ot = DECL_TEMPLATE_RESULT (olddecl);
2148 if (DECL_TEMPLATE_INFO (ot))
2149 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2150 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2151 return "redefinition of %q#D";
2155 else if (TREE_CODE (newdecl) == VAR_DECL
2156 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2157 && (! DECL_LANG_SPECIFIC (olddecl)
2158 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2159 || DECL_THREAD_LOCAL_P (newdecl)))
2161 /* Only variables can be thread-local, and all declarations must
2162 agree on this property. */
2163 if (DECL_THREAD_LOCAL_P (newdecl))
2164 return "thread-local declaration of %q#D follows "
2165 "non-thread-local declaration";
2167 return "non-thread-local declaration of %q#D follows "
2168 "thread-local declaration";
2170 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2172 /* The objects have been declared at namespace scope. If either
2173 is a member of an anonymous union, then this is an invalid
2174 redeclaration. For example:
2180 if (DECL_ANON_UNION_VAR_P (newdecl)
2181 || DECL_ANON_UNION_VAR_P (olddecl))
2182 return "redeclaration of %q#D";
2183 /* If at least one declaration is a reference, there is no
2184 conflict. For example:
2190 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2192 /* Reject two definitions. */
2193 return "redefinition of %q#D";
2197 /* Objects declared with block scope: */
2198 /* Reject two definitions, and reject a definition
2199 together with an external reference. */
2200 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2201 return "redeclaration of %q#D";
2206 /* Hash and equality functions for the named_label table. */
2209 named_label_entry_hash (const void *data)
2211 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2212 return DECL_UID (ent->label_decl);
2216 named_label_entry_eq (const void *a, const void *b)
2218 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2219 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2220 return ent_a->label_decl == ent_b->label_decl;
2223 /* Create a new label, named ID. */
2226 make_label_decl (tree id, int local_p)
2228 struct named_label_entry *ent;
2232 decl = build_decl (LABEL_DECL, id, void_type_node);
2234 DECL_CONTEXT (decl) = current_function_decl;
2235 DECL_MODE (decl) = VOIDmode;
2236 C_DECLARED_LABEL_FLAG (decl) = local_p;
2238 /* Say where one reference is to the label, for the sake of the
2239 error if it is not defined. */
2240 DECL_SOURCE_LOCATION (decl) = input_location;
2242 /* Record the fact that this identifier is bound to this label. */
2243 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2245 /* Create the label htab for the function on demand. */
2247 named_labels = htab_create_ggc (13, named_label_entry_hash,
2248 named_label_entry_eq, NULL);
2250 /* Record this label on the list of labels used in this function.
2251 We do this before calling make_label_decl so that we get the
2252 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2253 ent = GGC_CNEW (struct named_label_entry);
2254 ent->label_decl = decl;
2256 slot = htab_find_slot (named_labels, ent, INSERT);
2257 gcc_assert (*slot == NULL);
2263 /* Look for a label named ID in the current function. If one cannot
2264 be found, create one. (We keep track of used, but undefined,
2265 labels, and complain about them at the end of a function.) */
2268 lookup_label (tree id)
2272 timevar_push (TV_NAME_LOOKUP);
2273 /* You can't use labels at global scope. */
2274 if (current_function_decl == NULL_TREE)
2276 error ("label %qE referenced outside of any function", id);
2277 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2280 /* See if we've already got this label. */
2281 decl = IDENTIFIER_LABEL_VALUE (id);
2282 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2283 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2285 decl = make_label_decl (id, /*local_p=*/0);
2286 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2289 /* Declare a local label named ID. */
2292 declare_local_label (tree id)
2296 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2297 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2298 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2299 current_binding_level->shadowed_labels);
2300 current_binding_level->shadowed_labels = shadow;
2302 decl = make_label_decl (id, /*local_p=*/1);
2303 TREE_VALUE (shadow) = decl;
2308 /* Returns nonzero if it is ill-formed to jump past the declaration of
2309 DECL. Returns 2 if it's also a real problem. */
2312 decl_jump_unsafe (tree decl)
2314 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2315 || TREE_TYPE (decl) == error_mark_node)
2318 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2319 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2322 if (pod_type_p (TREE_TYPE (decl)))
2325 /* The POD stuff is just pedantry; why should it matter if the class
2326 contains a field of pointer to member type? */
2330 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2333 identify_goto (tree decl, const location_t *locus)
2336 pedwarn ("jump to label %qD", decl);
2338 pedwarn ("jump to case label");
2340 pedwarn ("%H from here", locus);
2343 /* Check that a single previously seen jump to a newly defined label
2344 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2345 the jump context; NAMES are the names in scope in LEVEL at the jump
2346 context; LOCUS is the source position of the jump or 0. Returns
2347 true if all is well. */
2350 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2351 bool exited_omp, const location_t *locus)
2353 struct cp_binding_level *b;
2354 bool identified = false, saw_eh = false, saw_omp = false;
2358 identify_goto (decl, locus);
2359 error (" exits OpenMP structured block");
2360 identified = saw_omp = true;
2363 for (b = current_binding_level; b ; b = b->level_chain)
2365 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2367 for (new_decls = b->names; new_decls != old_decls;
2368 new_decls = TREE_CHAIN (new_decls))
2370 int problem = decl_jump_unsafe (new_decls);
2376 identify_goto (decl, locus);
2380 error (" crosses initialization of %q+#D", new_decls);
2382 pedwarn (" enters scope of non-POD %q+#D", new_decls);
2387 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2391 identify_goto (decl, locus);
2394 if (b->kind == sk_try)
2395 error (" enters try block");
2397 error (" enters catch block");
2400 if (b->kind == sk_omp && !saw_omp)
2404 identify_goto (decl, locus);
2407 error (" enters OpenMP structured block");
2416 check_previous_goto (tree decl, struct named_label_use_entry *use)
2418 check_previous_goto_1 (decl, use->binding_level,
2419 use->names_in_scope, use->in_omp_scope,
2420 &use->o_goto_locus);
2424 check_switch_goto (struct cp_binding_level* level)
2426 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2429 /* Check that a new jump to a label DECL is OK. Called by
2430 finish_goto_stmt. */
2433 check_goto (tree decl)
2435 struct named_label_entry *ent, dummy;
2436 bool saw_catch = false, identified = false;
2439 /* We can't know where a computed goto is jumping.
2440 So we assume that it's OK. */
2441 if (TREE_CODE (decl) != LABEL_DECL)
2444 /* We didn't record any information about this label when we created it,
2445 and there's not much point since it's trivial to analyze as a return. */
2446 if (decl == cdtor_label)
2449 dummy.label_decl = decl;
2450 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2451 gcc_assert (ent != NULL);
2453 /* If the label hasn't been defined yet, defer checking. */
2454 if (! DECL_INITIAL (decl))
2456 struct named_label_use_entry *new_use;
2458 /* Don't bother creating another use if the last goto had the
2459 same data, and will therefore create the same set of errors. */
2461 && ent->uses->names_in_scope == current_binding_level->names)
2464 new_use = GGC_NEW (struct named_label_use_entry);
2465 new_use->binding_level = current_binding_level;
2466 new_use->names_in_scope = current_binding_level->names;
2467 new_use->o_goto_locus = input_location;
2468 new_use->in_omp_scope = false;
2470 new_use->next = ent->uses;
2471 ent->uses = new_use;
2475 if (ent->in_try_scope || ent->in_catch_scope
2476 || ent->in_omp_scope || ent->bad_decls)
2478 pedwarn ("jump to label %q+D", decl);
2479 pedwarn (" from here");
2483 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2485 tree b = TREE_VALUE (bad);
2486 int u = decl_jump_unsafe (b);
2488 if (u > 1 && DECL_ARTIFICIAL (b))
2490 /* Can't skip init of __exception_info. */
2491 error ("%J enters catch block", b);
2495 error (" skips initialization of %q+#D", b);
2497 pedwarn (" enters scope of non-POD %q+#D", b);
2500 if (ent->in_try_scope)
2501 error (" enters try block");
2502 else if (ent->in_catch_scope && !saw_catch)
2503 error (" enters catch block");
2505 if (ent->in_omp_scope)
2506 error (" enters OpenMP structured block");
2507 else if (flag_openmp)
2509 struct cp_binding_level *b;
2510 for (b = current_binding_level; b ; b = b->level_chain)
2512 if (b == ent->binding_level)
2514 if (b->kind == sk_omp)
2518 pedwarn ("jump to label %q+D", decl);
2519 pedwarn (" from here");
2522 error (" exits OpenMP structured block");
2529 /* Check that a return is ok wrt OpenMP structured blocks.
2530 Called by finish_return_stmt. Returns true if all is well. */
2533 check_omp_return (void)
2535 struct cp_binding_level *b;
2536 for (b = current_binding_level; b ; b = b->level_chain)
2537 if (b->kind == sk_omp)
2539 error ("invalid exit from OpenMP structured block");
2545 /* Define a label, specifying the location in the source file.
2546 Return the LABEL_DECL node for the label. */
2549 define_label (location_t location, tree name)
2551 struct named_label_entry *ent, dummy;
2552 struct cp_binding_level *p;
2555 timevar_push (TV_NAME_LOOKUP);
2557 decl = lookup_label (name);
2559 dummy.label_decl = decl;
2560 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2561 gcc_assert (ent != NULL);
2563 /* After labels, make any new cleanups in the function go into their
2564 own new (temporary) binding contour. */
2565 for (p = current_binding_level;
2566 p->kind != sk_function_parms;
2568 p->more_cleanups_ok = 0;
2570 if (name == get_identifier ("wchar_t"))
2571 pedwarn ("label named wchar_t");
2573 if (DECL_INITIAL (decl) != NULL_TREE)
2575 error ("duplicate label %qD", decl);
2576 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2580 struct named_label_use_entry *use;
2582 /* Mark label as having been defined. */
2583 DECL_INITIAL (decl) = error_mark_node;
2584 /* Say where in the source. */
2585 DECL_SOURCE_LOCATION (decl) = location;
2587 ent->binding_level = current_binding_level;
2588 ent->names_in_scope = current_binding_level->names;
2590 for (use = ent->uses; use ; use = use->next)
2591 check_previous_goto (decl, use);
2595 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2600 struct cp_binding_level *level;
2601 struct cp_switch *next;
2602 /* The SWITCH_STMT being built. */
2604 /* A splay-tree mapping the low element of a case range to the high
2605 element, or NULL_TREE if there is no high element. Used to
2606 determine whether or not a new case label duplicates an old case
2607 label. We need a tree, rather than simply a hash table, because
2608 of the GNU case range extension. */
2612 /* A stack of the currently active switch statements. The innermost
2613 switch statement is on the top of the stack. There is no need to
2614 mark the stack for garbage collection because it is only active
2615 during the processing of the body of a function, and we never
2616 collect at that point. */
2618 static struct cp_switch *switch_stack;
2620 /* Called right after a switch-statement condition is parsed.
2621 SWITCH_STMT is the switch statement being parsed. */
2624 push_switch (tree switch_stmt)
2626 struct cp_switch *p = XNEW (struct cp_switch);
2627 p->level = current_binding_level;
2628 p->next = switch_stack;
2629 p->switch_stmt = switch_stmt;
2630 p->cases = splay_tree_new (case_compare, NULL, NULL);
2637 struct cp_switch *cs = switch_stack;
2638 location_t switch_location;
2640 /* Emit warnings as needed. */
2641 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2642 switch_location = EXPR_LOCATION (cs->switch_stmt);
2644 switch_location = input_location;
2645 if (!processing_template_decl)
2646 c_do_switch_warnings (cs->cases, switch_location,
2647 SWITCH_STMT_TYPE (cs->switch_stmt),
2648 SWITCH_STMT_COND (cs->switch_stmt));
2650 splay_tree_delete (cs->cases);
2651 switch_stack = switch_stack->next;
2655 /* Note that we've seen a definition of a case label, and complain if this
2656 is a bad place for one. */
2659 finish_case_label (tree low_value, tree high_value)
2662 struct cp_binding_level *p;
2664 if (processing_template_decl)
2668 /* For templates, just add the case label; we'll do semantic
2669 analysis at instantiation-time. */
2670 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2671 return add_stmt (build_case_label (low_value, high_value, label));
2674 /* Find the condition on which this switch statement depends. */
2675 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2676 if (cond && TREE_CODE (cond) == TREE_LIST)
2677 cond = TREE_VALUE (cond);
2679 if (!check_switch_goto (switch_stack->level))
2680 return error_mark_node;
2682 r = c_add_case_label (switch_stack->cases, cond, TREE_TYPE (cond),
2683 low_value, high_value);
2685 /* After labels, make any new cleanups in the function go into their
2686 own new (temporary) binding contour. */
2687 for (p = current_binding_level;
2688 p->kind != sk_function_parms;
2690 p->more_cleanups_ok = 0;
2695 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2698 typename_hash (const void* k)
2703 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2704 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2709 typedef struct typename_info {
2717 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2720 typename_compare (const void * k1, const void * k2)
2723 const typename_info *t2;
2726 t2 = (const typename_info *) k2;
2728 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2729 && TYPE_CONTEXT (t1) == t2->scope
2730 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2731 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2732 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2735 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2736 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2738 Returns the new TYPENAME_TYPE. */
2740 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2743 build_typename_type (tree context, tree name, tree fullname,
2744 enum tag_types tag_type)
2752 if (typename_htab == NULL)
2753 typename_htab = htab_create_ggc (61, &typename_hash,
2754 &typename_compare, NULL);
2756 ti.scope = FROB_CONTEXT (context);
2758 ti.template_id = fullname;
2759 ti.enum_p = tag_type == enum_type;
2760 ti.class_p = (tag_type == class_type
2761 || tag_type == record_type
2762 || tag_type == union_type);
2763 hash = (htab_hash_pointer (ti.scope)
2764 ^ htab_hash_pointer (ti.name));
2766 /* See if we already have this type. */
2767 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2772 /* Build the TYPENAME_TYPE. */
2773 t = make_aggr_type (TYPENAME_TYPE);
2774 TYPE_CONTEXT (t) = ti.scope;
2775 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2776 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2777 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2779 /* Build the corresponding TYPE_DECL. */
2780 d = build_decl (TYPE_DECL, name, t);
2781 TYPE_NAME (TREE_TYPE (d)) = d;
2782 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2783 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2784 DECL_ARTIFICIAL (d) = 1;
2786 /* Store it in the hash table. */
2793 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2794 provided to name the type. Returns an appropriate type, unless an
2795 error occurs, in which case error_mark_node is returned. If we
2796 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2797 return that, rather than the _TYPE it corresponds to, in other
2798 cases we look through the type decl. If TF_ERROR is set, complain
2799 about errors, otherwise be quiet. */
2802 make_typename_type (tree context, tree name, enum tag_types tag_type,
2803 tsubst_flags_t complain)
2809 if (name == error_mark_node
2810 || context == NULL_TREE
2811 || context == error_mark_node)
2812 return error_mark_node;
2816 if (!(TYPE_LANG_SPECIFIC (name)
2817 && (CLASSTYPE_IS_TEMPLATE (name)
2818 || CLASSTYPE_USE_TEMPLATE (name))))
2819 name = TYPE_IDENTIFIER (name);
2821 /* Create a TEMPLATE_ID_EXPR for the type. */
2822 name = build_nt (TEMPLATE_ID_EXPR,
2823 CLASSTYPE_TI_TEMPLATE (name),
2824 CLASSTYPE_TI_ARGS (name));
2826 else if (TREE_CODE (name) == TYPE_DECL)
2827 name = DECL_NAME (name);
2831 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2833 name = TREE_OPERAND (name, 0);
2834 if (TREE_CODE (name) == TEMPLATE_DECL)
2835 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2836 else if (TREE_CODE (name) == OVERLOAD)
2838 error ("%qD is not a type", name);
2839 return error_mark_node;
2842 if (TREE_CODE (name) == TEMPLATE_DECL)
2844 error ("%qD used without template parameters", name);
2845 return error_mark_node;
2847 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2848 gcc_assert (TYPE_P (context));
2850 /* When the CONTEXT is a dependent type, NAME could refer to a
2851 dependent base class of CONTEXT. So we cannot peek inside it,
2852 even if CONTEXT is a currently open scope. */
2853 if (dependent_type_p (context))
2854 return build_typename_type (context, name, fullname, tag_type);
2856 if (!IS_AGGR_TYPE (context))
2858 if (complain & tf_error)
2859 error ("%q#T is not a class", context);
2860 return error_mark_node;
2863 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
2865 /* We should only set WANT_TYPE when we're a nested typename type.
2866 Then we can give better diagnostics if we find a non-type. */
2867 t = lookup_field (context, name, 0, /*want_type=*/true);
2870 if (complain & tf_error)
2871 error (want_template ? "no class template named %q#T in %q#T"
2872 : "no type named %q#T in %q#T", name, context);
2873 return error_mark_node;
2876 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
2878 if (complain & tf_error)
2879 error ("%<typename %T::%D%> names %q#T, which is not a class template",
2881 return error_mark_node;
2883 if (!want_template && TREE_CODE (t) != TYPE_DECL)
2885 if (complain & tf_error)
2886 error ("%<typename %T::%D%> names %q#T, which is not a type",
2888 return error_mark_node;
2891 if (complain & tf_error)
2892 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
2895 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
2897 /*entering_scope=*/0,
2898 tf_warning_or_error | tf_user);
2900 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2906 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
2907 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
2908 in which case error_mark_node is returned.
2910 If PARM_LIST is non-NULL, also make sure that the template parameter
2911 list of TEMPLATE_DECL matches.
2913 If COMPLAIN zero, don't complain about any errors that occur. */
2916 make_unbound_class_template (tree context, tree name, tree parm_list,
2917 tsubst_flags_t complain)
2923 name = TYPE_IDENTIFIER (name);
2924 else if (DECL_P (name))
2925 name = DECL_NAME (name);
2926 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
2928 if (!dependent_type_p (context)
2929 || currently_open_class (context))
2931 tree tmpl = NULL_TREE;
2933 if (IS_AGGR_TYPE (context))
2934 tmpl = lookup_field (context, name, 0, false);
2936 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2938 if (complain & tf_error)
2939 error ("no class template named %q#T in %q#T", name, context);
2940 return error_mark_node;
2944 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
2946 if (complain & tf_error)
2948 error ("template parameters do not match template");
2949 error ("%q+D declared here", tmpl);
2951 return error_mark_node;
2954 if (complain & tf_error)
2955 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
2960 /* Build the UNBOUND_CLASS_TEMPLATE. */
2961 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2962 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2963 TREE_TYPE (t) = NULL_TREE;
2965 /* Build the corresponding TEMPLATE_DECL. */
2966 d = build_decl (TEMPLATE_DECL, name, t);
2967 TYPE_NAME (TREE_TYPE (d)) = d;
2968 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2969 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2970 DECL_ARTIFICIAL (d) = 1;
2971 DECL_TEMPLATE_PARMS (d) = parm_list;
2978 /* Push the declarations of builtin types into the namespace.
2979 RID_INDEX is the index of the builtin type in the array
2980 RID_POINTERS. NAME is the name used when looking up the builtin
2981 type. TYPE is the _TYPE node for the builtin type. */
2984 record_builtin_type (enum rid rid_index,
2988 tree rname = NULL_TREE, tname = NULL_TREE;
2989 tree tdecl = NULL_TREE;
2991 if ((int) rid_index < (int) RID_MAX)
2992 rname = ridpointers[(int) rid_index];
2994 tname = get_identifier (name);
2996 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2997 eliminated. Built-in types should not be looked up name; their
2998 names are keywords that the parser can recognize. However, there
2999 is code in c-common.c that uses identifier_global_value to look
3000 up built-in types by name. */
3003 tdecl = build_decl (TYPE_DECL, tname, type);
3004 DECL_ARTIFICIAL (tdecl) = 1;
3005 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3011 tdecl = build_decl (TYPE_DECL, rname, type);
3012 DECL_ARTIFICIAL (tdecl) = 1;
3014 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3017 if (!TYPE_NAME (type))
3018 TYPE_NAME (type) = tdecl;
3021 debug_hooks->type_decl (tdecl, 0);
3024 /* Record one of the standard Java types.
3025 * Declare it as having the given NAME.
3026 * If SIZE > 0, it is the size of one of the integral types;
3027 * otherwise it is the negative of the size of one of the other types. */
3030 record_builtin_java_type (const char* name, int size)
3034 type = make_signed_type (size);
3035 else if (size > -32)
3036 { /* "__java_char" or ""__java_boolean". */
3037 type = make_unsigned_type (-size);
3038 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3041 { /* "__java_float" or ""__java_double". */
3042 type = make_node (REAL_TYPE);
3043 TYPE_PRECISION (type) = - size;
3046 record_builtin_type (RID_MAX, name, type);
3047 decl = TYPE_NAME (type);
3049 /* Suppress generate debug symbol entries for these types,
3050 since for normal C++ they are just clutter.
3051 However, push_lang_context undoes this if extern "Java" is seen. */
3052 DECL_IGNORED_P (decl) = 1;
3054 TYPE_FOR_JAVA (type) = 1;
3058 /* Push a type into the namespace so that the back-ends ignore it. */
3061 record_unknown_type (tree type, const char* name)
3063 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3064 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3065 DECL_IGNORED_P (decl) = 1;
3066 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3067 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3068 TYPE_ALIGN (type) = 1;
3069 TYPE_USER_ALIGN (type) = 0;
3070 TYPE_MODE (type) = TYPE_MODE (void_type_node);
3073 /* A string for which we should create an IDENTIFIER_NODE at
3076 typedef struct predefined_identifier
3078 /* The name of the identifier. */
3079 const char *const name;
3080 /* The place where the IDENTIFIER_NODE should be stored. */
3082 /* Nonzero if this is the name of a constructor or destructor. */
3083 const int ctor_or_dtor_p;
3084 } predefined_identifier;
3086 /* Create all the predefined identifiers. */
3089 initialize_predefined_identifiers (void)
3091 const predefined_identifier *pid;
3093 /* A table of identifiers to create at startup. */
3094 static const predefined_identifier predefined_identifiers[] = {
3095 { "C++", &lang_name_cplusplus, 0 },
3096 { "C", &lang_name_c, 0 },
3097 { "Java", &lang_name_java, 0 },
3098 /* Some of these names have a trailing space so that it is
3099 impossible for them to conflict with names written by users. */
3100 { "__ct ", &ctor_identifier, 1 },
3101 { "__base_ctor ", &base_ctor_identifier, 1 },
3102 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3103 { "__dt ", &dtor_identifier, 1 },
3104 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3105 { "__base_dtor ", &base_dtor_identifier, 1 },
3106 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3107 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3108 { "nelts", &nelts_identifier, 0 },
3109 { THIS_NAME, &this_identifier, 0 },
3110 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3111 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3112 { "_vptr", &vptr_identifier, 0 },
3113 { "__vtt_parm", &vtt_parm_identifier, 0 },
3114 { "::", &global_scope_name, 0 },
3115 { "std", &std_identifier, 0 },
3119 for (pid = predefined_identifiers; pid->name; ++pid)
3121 *pid->node = get_identifier (pid->name);
3122 if (pid->ctor_or_dtor_p)
3123 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3127 /* Create the predefined scalar types of C,
3128 and some nodes representing standard constants (0, 1, (void *)0).
3129 Initialize the global binding level.
3130 Make definitions for built-in primitive functions. */
3133 cxx_init_decl_processing (void)
3136 tree void_ftype_ptr;
3138 build_common_tree_nodes (flag_signed_char, false);
3140 /* Create all the identifiers we need. */
3141 initialize_predefined_identifiers ();
3143 /* Create the global variables. */
3144 push_to_top_level ();
3146 current_function_decl = NULL_TREE;
3147 current_binding_level = NULL;
3148 /* Enter the global namespace. */
3149 gcc_assert (global_namespace == NULL_TREE);
3150 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3152 TREE_PUBLIC (global_namespace) = 1;
3153 begin_scope (sk_namespace, global_namespace);
3155 current_lang_name = NULL_TREE;
3157 /* Adjust various flags based on command-line settings. */
3158 if (!flag_permissive)
3159 flag_pedantic_errors = 1;
3160 if (!flag_no_inline)
3162 flag_inline_trees = 1;
3165 if (flag_inline_functions)
3166 flag_inline_trees = 2;
3168 if (flag_visibility_ms_compat)
3169 default_visibility = VISIBILITY_HIDDEN;
3172 current_lang_name = lang_name_c;
3174 /* Create the `std' namespace. */
3175 push_namespace (std_identifier);
3176 std_node = current_namespace;
3179 c_common_nodes_and_builtins ();
3181 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3182 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3183 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3184 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3185 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3186 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3187 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3188 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3190 integer_two_node = build_int_cst (NULL_TREE, 2);
3191 integer_three_node = build_int_cst (NULL_TREE, 3);
3193 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3194 truthvalue_type_node = boolean_type_node;
3195 truthvalue_false_node = boolean_false_node;
3196 truthvalue_true_node = boolean_true_node;
3198 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3201 record_builtin_type (RID_MAX, NULL, string_type_node);
3204 delta_type_node = ptrdiff_type_node;
3205 vtable_index_type = ptrdiff_type_node;
3207 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3208 void_ftype = build_function_type (void_type_node, void_list_node);
3209 void_ftype_ptr = build_function_type (void_type_node,
3210 tree_cons (NULL_TREE,
3214 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3216 /* C++ extensions */
3218 unknown_type_node = make_node (UNKNOWN_TYPE);
3219 record_unknown_type (unknown_type_node, "unknown type");
3221 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3222 TREE_TYPE (unknown_type_node) = unknown_type_node;
3224 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3226 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3227 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3230 /* Make sure we get a unique function type, so we can give
3231 its pointer type a name. (This wins for gdb.) */
3232 tree vfunc_type = make_node (FUNCTION_TYPE);
3233 TREE_TYPE (vfunc_type) = integer_type_node;
3234 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3235 layout_type (vfunc_type);
3237 vtable_entry_type = build_pointer_type (vfunc_type);
3239 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3242 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3243 layout_type (vtbl_type_node);
3244 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3245 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3246 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3247 layout_type (vtbl_ptr_type_node);
3248 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3250 push_namespace (get_identifier ("__cxxabiv1"));
3251 abi_node = current_namespace;
3254 global_type_node = make_node (LANG_TYPE);
3255 record_unknown_type (global_type_node, "global type");
3258 current_lang_name = lang_name_cplusplus;
3262 tree bad_alloc_type_node;
3263 tree bad_alloc_decl;
3264 tree newtype, deltype;
3265 tree ptr_ftype_sizetype;
3267 push_namespace (std_identifier);
3268 bad_alloc_id = get_identifier ("bad_alloc");
3269 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3270 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3272 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3273 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3274 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3278 = build_function_type (ptr_type_node,
3279 tree_cons (NULL_TREE,
3282 newtype = build_exception_variant
3283 (ptr_ftype_sizetype, add_exception_specifier
3284 (NULL_TREE, bad_alloc_type_node, -1));
3285 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3286 push_cp_library_fn (NEW_EXPR, newtype);
3287 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3288 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3289 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3293 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3295 /* Perform other language dependent initializations. */
3296 init_class_processing ();
3297 init_rtti_processing ();
3299 if (flag_exceptions)
3300 init_exception_processing ();
3302 if (! supports_one_only ())
3305 make_fname_decl = cp_make_fname_decl;
3306 start_fname_decls ();
3308 /* Show we use EH for cleanups. */
3309 if (flag_exceptions)
3310 using_eh_for_cleanups ();
3313 /* Generate an initializer for a function naming variable from
3314 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3315 filled in with the type of the init. */
3318 cp_fname_init (const char* name, tree *type_p)
3320 tree domain = NULL_TREE;
3322 tree init = NULL_TREE;
3327 length = strlen (name);
3328 domain = build_index_type (size_int (length));
3329 init = build_string (length + 1, name);
3332 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3333 type = build_cplus_array_type (type, domain);
3338 TREE_TYPE (init) = type;
3340 init = error_mark_node;
3345 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3346 decl, NAME is the initialization string and TYPE_DEP indicates whether
3347 NAME depended on the type of the function. We make use of that to detect
3348 __PRETTY_FUNCTION__ inside a template fn. This is being done
3349 lazily at the point of first use, so we mustn't push the decl now. */
3352 cp_make_fname_decl (tree id, int type_dep)
3354 const char *const name = (type_dep && processing_template_decl
3355 ? NULL : fname_as_string (type_dep));
3357 tree init = cp_fname_init (name, &type);
3358 tree decl = build_decl (VAR_DECL, id, type);
3361 free ((char *) name);
3363 /* As we're using pushdecl_with_scope, we must set the context. */
3364 DECL_CONTEXT (decl) = current_function_decl;
3365 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3367 TREE_STATIC (decl) = 1;
3368 TREE_READONLY (decl) = 1;
3369 DECL_ARTIFICIAL (decl) = 1;
3371 TREE_USED (decl) = 1;
3373 if (current_function_decl)
3375 struct cp_binding_level *b = current_binding_level;
3376 while (b->level_chain->kind != sk_function_parms)
3378 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3379 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3380 LOOKUP_ONLYCONVERTING);
3383 pushdecl_top_level_and_finish (decl, init);
3388 /* Make a definition for a builtin function named NAME in the current
3389 namespace, whose data type is TYPE and whose context is CONTEXT.
3390 TYPE should be a function type with argument types.
3392 CLASS and CODE tell later passes how to compile calls to this function.
3393 See tree.h for possible values.
3395 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3396 the name to be called if we can't opencode the function.
3397 If ATTRS is nonzero, use that for the function's attribute
3401 builtin_function_1 (const char* name,
3404 enum built_in_function code,
3405 enum built_in_class class,
3406 const char* libname,
3409 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3410 DECL_BUILT_IN_CLASS (decl) = class;
3411 DECL_FUNCTION_CODE (decl) = code;
3412 DECL_CONTEXT (decl) = context;
3416 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3417 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3418 function in the namespace. */
3420 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3422 /* A function in the user's namespace should have an explicit
3423 declaration before it is used. Mark the built-in function as
3424 anticipated but not actually declared. */
3425 if (name[0] != '_' || name[1] != '_')
3426 DECL_ANTICIPATED (decl) = 1;
3428 /* Possibly apply some default attributes to this built-in function. */
3430 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3432 decl_attributes (&decl, NULL_TREE, 0);
3437 /* Entry point for the benefit of c_common_nodes_and_builtins.
3439 Make a definition for a builtin function named NAME and whose data type
3440 is TYPE. TYPE should be a function type with argument types. This
3441 function places the anticipated declaration in the global namespace
3442 and additionally in the std namespace if appropriate.
3444 CLASS and CODE tell later passes how to compile calls to this function.
3445 See tree.h for possible values.
3447 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3448 the name to be called if we can't opencode the function.
3450 If ATTRS is nonzero, use that for the function's attribute
3454 builtin_function (const char* name,
3457 enum built_in_class cl,
3458 const char* libname,
3461 /* All builtins that don't begin with an '_' should additionally
3462 go in the 'std' namespace. */
3465 push_namespace (std_identifier);
3466 builtin_function_1 (name, type, std_node, code, cl, libname, attrs);
3470 return builtin_function_1 (name, type, NULL_TREE, code,
3471 cl, libname, attrs);
3474 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3475 function. Not called directly. */
3478 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3480 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3481 DECL_EXTERNAL (fn) = 1;
3482 TREE_PUBLIC (fn) = 1;
3483 DECL_ARTIFICIAL (fn) = 1;
3484 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3485 SET_DECL_LANGUAGE (fn, lang_c);
3486 /* Runtime library routines are, by definition, available in an
3487 external shared object. */
3488 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3489 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3493 /* Returns the _DECL for a library function with C linkage.
3494 We assume that such functions never throw; if this is incorrect,
3495 callers should unset TREE_NOTHROW. */
3498 build_library_fn (tree name, tree type)
3500 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3501 TREE_NOTHROW (fn) = 1;
3505 /* Returns the _DECL for a library function with C++ linkage. */
3508 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3510 tree fn = build_library_fn_1 (name, operator_code, type);
3511 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3512 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3513 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3517 /* Like build_library_fn, but takes a C string instead of an
3521 build_library_fn_ptr (const char* name, tree type)
3523 return build_library_fn (get_identifier (name), type);
3526 /* Like build_cp_library_fn, but takes a C string instead of an
3530 build_cp_library_fn_ptr (const char* name, tree type)
3532 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3535 /* Like build_library_fn, but also pushes the function so that we will
3536 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3539 push_library_fn (tree name, tree type)
3541 tree fn = build_library_fn (name, type);
3542 pushdecl_top_level (fn);
3546 /* Like build_cp_library_fn, but also pushes the function so that it
3547 will be found by normal lookup. */
3550 push_cp_library_fn (enum tree_code operator_code, tree type)
3552 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3559 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3563 push_void_library_fn (tree name, tree parmtypes)
3565 tree type = build_function_type (void_type_node, parmtypes);
3566 return push_library_fn (name, type);
3569 /* Like push_library_fn, but also note that this function throws
3570 and does not return. Used for __throw_foo and the like. */
3573 push_throw_library_fn (tree name, tree type)
3575 tree fn = push_library_fn (name, type);
3576 TREE_THIS_VOLATILE (fn) = 1;
3577 TREE_NOTHROW (fn) = 0;
3581 /* When we call finish_struct for an anonymous union, we create
3582 default copy constructors and such. But, an anonymous union
3583 shouldn't have such things; this function undoes the damage to the
3584 anonymous union type T.
3586 (The reason that we create the synthesized methods is that we don't
3587 distinguish `union { int i; }' from `typedef union { int i; } U'.
3588 The first is an anonymous union; the second is just an ordinary
3592 fixup_anonymous_aggr (tree t)
3596 /* Wipe out memory of synthesized methods. */
3597 TYPE_HAS_CONSTRUCTOR (t) = 0;
3598 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3599 TYPE_HAS_INIT_REF (t) = 0;
3600 TYPE_HAS_CONST_INIT_REF (t) = 0;
3601 TYPE_HAS_ASSIGN_REF (t) = 0;
3602 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3604 /* Splice the implicitly generated functions out of the TYPE_METHODS
3606 q = &TYPE_METHODS (t);
3609 if (DECL_ARTIFICIAL (*q))
3610 *q = TREE_CHAIN (*q);
3612 q = &TREE_CHAIN (*q);
3615 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3616 if (TYPE_METHODS (t))
3617 error ("%Jan anonymous union cannot have function members",
3618 TYPE_MAIN_DECL (t));
3620 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3621 assignment operators (because they cannot have these methods themselves).
3622 For anonymous unions this is already checked because they are not allowed
3623 in any union, otherwise we have to check it. */
3624 if (TREE_CODE (t) != UNION_TYPE)
3628 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3629 if (TREE_CODE (field) == FIELD_DECL)
3631 type = TREE_TYPE (field);
3632 if (CLASS_TYPE_P (type))
3634 if (TYPE_NEEDS_CONSTRUCTING (type))
3635 error ("member %q+#D with constructor not allowed "
3636 "in anonymous aggregate", field);
3637 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3638 error ("member %q+#D with destructor not allowed "
3639 "in anonymous aggregate", field);
3640 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3641 error ("member %q+#D with copy assignment operator "
3642 "not allowed in anonymous aggregate", field);
3648 /* Make sure that a declaration with no declarator is well-formed, i.e.
3649 just declares a tagged type or anonymous union.
3651 Returns the type declared; or NULL_TREE if none. */
3654 check_tag_decl (cp_decl_specifier_seq *declspecs)
3656 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3657 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3658 /* If a class, struct, or enum type is declared by the DECLSPECS
3659 (i.e, if a class-specifier, enum-specifier, or non-typename
3660 elaborated-type-specifier appears in the DECLSPECS),
3661 DECLARED_TYPE is set to the corresponding type. */
3662 tree declared_type = NULL_TREE;
3663 bool error_p = false;
3665 if (declspecs->multiple_types_p)
3666 error ("multiple types in one declaration");
3667 else if (declspecs->redefined_builtin_type)
3669 if (!in_system_header)
3670 pedwarn ("redeclaration of C++ built-in type %qT",
3671 declspecs->redefined_builtin_type);
3676 && TYPE_P (declspecs->type)
3677 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3678 && IS_AGGR_TYPE (declspecs->type))
3679 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3680 declared_type = declspecs->type;
3681 else if (declspecs->type == error_mark_node)
3683 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3684 pedwarn ("declaration does not declare anything");
3685 /* Check for an anonymous union. */
3686 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3687 && TYPE_ANONYMOUS_P (declared_type))
3689 /* 7/3 In a simple-declaration, the optional init-declarator-list
3690 can be omitted only when declaring a class (clause 9) or
3691 enumeration (7.2), that is, when the decl-specifier-seq contains
3692 either a class-specifier, an elaborated-type-specifier with
3693 a class-key (9.1), or an enum-specifier. In these cases and
3694 whenever a class-specifier or enum-specifier is present in the
3695 decl-specifier-seq, the identifiers in these specifiers are among
3696 the names being declared by the declaration (as class-name,
3697 enum-names, or enumerators, depending on the syntax). In such
3698 cases, and except for the declaration of an unnamed bit-field (9.6),
3699 the decl-specifier-seq shall introduce one or more names into the
3700 program, or shall redeclare a name introduced by a previous
3701 declaration. [Example:
3702 enum { }; // ill-formed
3703 typedef class { }; // ill-formed
3707 error ("missing type-name in typedef-declaration");
3710 /* Anonymous unions are objects, so they can have specifiers. */;
3711 SET_ANON_AGGR_TYPE_P (declared_type);
3713 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3714 && !in_system_header)
3715 pedwarn ("ISO C++ prohibits anonymous structs");
3720 if (declspecs->specs[(int)ds_inline]
3721 || declspecs->specs[(int)ds_virtual])
3722 error ("%qs can only be specified for functions",
3723 declspecs->specs[(int)ds_inline]
3724 ? "inline" : "virtual");
3726 && (!current_class_type
3727 || current_scope () != current_class_type))
3728 error ("%<friend%> can only be specified inside a class");
3729 else if (declspecs->specs[(int)ds_explicit])
3730 error ("%<explicit%> can only be specified for constructors");
3731 else if (declspecs->storage_class)
3732 error ("a storage class can only be specified for objects "
3734 else if (declspecs->specs[(int)ds_const]
3735 || declspecs->specs[(int)ds_volatile]
3736 || declspecs->specs[(int)ds_restrict]
3737 || declspecs->specs[(int)ds_thread])
3738 error ("qualifiers can only be specified for objects "
3742 return declared_type;
3745 /* Called when a declaration is seen that contains no names to declare.
3746 If its type is a reference to a structure, union or enum inherited
3747 from a containing scope, shadow that tag name for the current scope
3748 with a forward reference.
3749 If its type defines a new named structure or union
3750 or defines an enum, it is valid but we need not do anything here.
3751 Otherwise, it is an error.
3753 C++: may have to grok the declspecs to learn about static,
3754 complain for anonymous unions.
3756 Returns the TYPE declared -- or NULL_TREE if none. */
3759 shadow_tag (cp_decl_specifier_seq *declspecs)
3761 tree t = check_tag_decl (declspecs);
3766 if (declspecs->attributes)
3768 warning (0, "attribute ignored in declaration of %q+#T", t);
3769 warning (0, "attribute for %q+#T must follow the %qs keyword",
3770 t, class_key_or_enum_as_string (t));
3774 if (maybe_process_partial_specialization (t) == error_mark_node)
3777 /* This is where the variables in an anonymous union are
3778 declared. An anonymous union declaration looks like:
3780 because there is no declarator after the union, the parser
3781 sends that declaration here. */
3782 if (ANON_AGGR_TYPE_P (t))
3784 fixup_anonymous_aggr (t);
3786 if (TYPE_FIELDS (t))
3788 tree decl = grokdeclarator (/*declarator=*/NULL,
3789 declspecs, NORMAL, 0, NULL);
3790 finish_anon_union (decl);
3797 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3800 groktypename (cp_decl_specifier_seq *type_specifiers,
3801 const cp_declarator *declarator)
3805 attrs = type_specifiers->attributes;
3806 type_specifiers->attributes = NULL_TREE;
3807 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3809 cplus_decl_attributes (&type, attrs, 0);
3813 /* Decode a declarator in an ordinary declaration or data definition.
3814 This is called as soon as the type information and variable name
3815 have been parsed, before parsing the initializer if any.
3816 Here we create the ..._DECL node, fill in its type,
3817 and put it on the list of decls for the current context.
3818 The ..._DECL node is returned as the value.
3820 Exception: for arrays where the length is not specified,
3821 the type is left null, to be filled in by `cp_finish_decl'.
3823 Function definitions do not come here; they go to start_function
3824 instead. However, external and forward declarations of functions
3825 do go through here. Structure field declarations are done by
3826 grokfield and not through here. */
3829 start_decl (const cp_declarator *declarator,
3830 cp_decl_specifier_seq *declspecs,
3833 tree prefix_attributes,
3834 tree *pushed_scope_p)
3841 *pushed_scope_p = NULL_TREE;
3843 /* An object declared as __attribute__((deprecated)) suppresses
3844 warnings of uses of other deprecated items. */
3845 if (lookup_attribute ("deprecated", attributes))
3846 deprecated_state = DEPRECATED_SUPPRESS;
3848 attributes = chainon (attributes, prefix_attributes);
3850 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3853 deprecated_state = DEPRECATED_NORMAL;
3855 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
3856 || decl == error_mark_node)
3857 return error_mark_node;
3859 type = TREE_TYPE (decl);
3861 context = DECL_CONTEXT (decl);
3865 *pushed_scope_p = push_scope (context);
3867 /* We are only interested in class contexts, later. */
3868 if (TREE_CODE (context) == NAMESPACE_DECL)
3869 context = NULL_TREE;
3873 /* Is it valid for this decl to have an initializer at all?
3874 If not, set INITIALIZED to zero, which will indirectly
3875 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3876 switch (TREE_CODE (decl))
3879 error ("typedef %qD is initialized (use __typeof__ instead)", decl);
3880 return error_mark_node;
3883 error ("function %q#D is initialized like a variable", decl);
3884 return error_mark_node;
3892 if (! toplevel_bindings_p ()
3893 && DECL_EXTERNAL (decl))
3894 warning (0, "declaration of %q#D has %<extern%> and is initialized",
3896 DECL_EXTERNAL (decl) = 0;
3897 if (toplevel_bindings_p ())
3898 TREE_STATIC (decl) = 1;
3901 /* Set attributes here so if duplicate decl, will have proper attributes. */
3902 cplus_decl_attributes (&decl, attributes, 0);
3904 /* Dllimported symbols cannot be defined. Static data members (which
3905 can be initialized in-class and dllimported) go through grokfield,
3906 not here, so we don't need to exclude those decls when checking for
3908 if (initialized && DECL_DLLIMPORT_P (decl))
3910 error ("definition of %q#D is marked %<dllimport%>", decl);
3911 DECL_DLLIMPORT_P (decl) = 0;
3914 /* If #pragma weak was used, mark the decl weak now. */
3915 maybe_apply_pragma_weak (decl);
3917 if (TREE_CODE (decl) == FUNCTION_DECL
3918 && DECL_DECLARED_INLINE_P (decl)
3919 && DECL_UNINLINABLE (decl)
3920 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3921 warning (0, "inline function %q+D given attribute noinline", decl);
3923 if (context && COMPLETE_TYPE_P (complete_type (context)))
3925 if (TREE_CODE (decl) == VAR_DECL)
3927 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3928 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3929 error ("%q#D is not a static member of %q#T", decl, context);
3932 if (DECL_CONTEXT (field) != context)
3934 if (!same_type_p (DECL_CONTEXT (field), context))
3935 pedwarn ("ISO C++ does not permit %<%T::%D%> "
3936 "to be defined as %<%T::%D%>",
3937 DECL_CONTEXT (field), DECL_NAME (decl),
3938 context, DECL_NAME (decl));
3939 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3941 if (processing_specialization
3942 && template_class_depth (context) == 0
3943 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
3944 error ("template header not allowed in member definition "
3945 "of explicitly specialized class");
3946 /* Static data member are tricky; an in-class initialization
3947 still doesn't provide a definition, so the in-class
3948 declaration will have DECL_EXTERNAL set, but will have an
3949 initialization. Thus, duplicate_decls won't warn
3950 about this situation, and so we check here. */
3951 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
3952 error ("duplicate initialization of %qD", decl);
3953 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
3959 tree field = check_classfn (context, decl,
3960 (processing_template_decl
3961 > template_class_depth (context))
3962 ? current_template_parms
3964 if (field && duplicate_decls (decl, field,
3965 /*newdecl_is_friend=*/false))
3969 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3970 DECL_IN_AGGR_P (decl) = 0;
3971 /* Do not mark DECL as an explicit specialization if it was not
3972 already marked as an instantiation; a declaration should
3973 never be marked as a specialization unless we know what
3974 template is being specialized. */
3975 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3977 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3979 /* [temp.expl.spec] An explicit specialization of a static data
3980 member of a template is a definition if the declaration
3981 includes an initializer; otherwise, it is a declaration.
3983 We check for processing_specialization so this only applies
3984 to the new specialization syntax. */
3985 if (!initialized && processing_specialization)
3986 DECL_EXTERNAL (decl) = 1;
3989 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3990 pedwarn ("declaration of %q#D outside of class is not definition",
3994 was_public = TREE_PUBLIC (decl);
3996 /* Enter this declaration into the symbol table. */
3997 tem = maybe_push_decl (decl);
3999 if (processing_template_decl)
4000 tem = push_template_decl (tem);
4001 if (tem == error_mark_node)
4002 return error_mark_node;
4004 /* Tell the back-end to use or not use .common as appropriate. If we say
4005 -fconserve-space, we want this to save .data space, at the expense of
4006 wrong semantics. If we say -fno-conserve-space, we want this to
4007 produce errors about redefs; to do this we force variables into the
4009 if (flag_conserve_space
4010 && TREE_CODE (tem) == VAR_DECL
4011 && TREE_PUBLIC (tem)
4012 && !DECL_THREAD_LOCAL_P (tem)
4013 && !have_global_bss_p ())
4014 DECL_COMMON (tem) = 1;
4016 if (TREE_CODE (tem) == VAR_DECL
4017 && DECL_NAMESPACE_SCOPE_P (tem) && !TREE_PUBLIC (tem) && !was_public
4018 && !DECL_THIS_STATIC (tem) && !DECL_ARTIFICIAL (tem))
4020 /* This is a const variable with implicit 'static'. Set
4021 DECL_THIS_STATIC so we can tell it from variables that are
4022 !TREE_PUBLIC because of the anonymous namespace. */
4023 gcc_assert (cp_type_readonly (TREE_TYPE (tem)));
4024 DECL_THIS_STATIC (tem) = 1;
4027 if (!processing_template_decl && TREE_CODE (tem) == VAR_DECL)
4028 start_decl_1 (tem, initialized);
4034 start_decl_1 (tree decl, bool initialized)
4038 gcc_assert (!processing_template_decl);
4040 if (error_operand_p (decl))
4043 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4044 type = TREE_TYPE (decl);
4047 /* Is it valid for this decl to have an initializer at all?
4048 If not, set INITIALIZED to zero, which will indirectly
4049 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4051 /* Don't allow initializations for incomplete types except for
4052 arrays which might be completed by the initialization. */
4053 if (COMPLETE_TYPE_P (complete_type (type)))
4054 ; /* A complete type is ok. */
4055 else if (TREE_CODE (type) != ARRAY_TYPE)
4057 error ("variable %q#D has initializer but incomplete type", decl);
4059 type = TREE_TYPE (decl) = error_mark_node;
4061 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4063 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4064 error ("elements of array %q#D have incomplete type", decl);
4065 /* else we already gave an error in start_decl. */
4069 else if (IS_AGGR_TYPE (type)
4070 && ! DECL_EXTERNAL (decl))
4072 if (!COMPLETE_TYPE_P (complete_type (type)))
4074 error ("aggregate %q#D has incomplete type and cannot be defined",
4076 /* Change the type so that assemble_variable will give
4077 DECL an rtl we can live with: (mem (const_int 0)). */
4078 type = TREE_TYPE (decl) = error_mark_node;
4082 /* If any base type in the hierarchy of TYPE needs a constructor,
4083 then we set initialized to 1. This way any nodes which are
4084 created for the purposes of initializing this aggregate
4085 will live as long as it does. This is necessary for global
4086 aggregates which do not have their initializers processed until
4087 the end of the file. */
4088 initialized = TYPE_NEEDS_CONSTRUCTING (type);
4092 /* Create a new scope to hold this declaration if necessary.
4093 Whether or not a new scope is necessary cannot be determined
4094 until after the type has been completed; if the type is a
4095 specialization of a class template it is not until after
4096 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4097 will be set correctly. */
4098 maybe_push_cleanup_level (type);
4101 /* Handle initialization of references. DECL, TYPE, and INIT have the
4102 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4103 but will be set to a new CLEANUP_STMT if a temporary is created
4104 that must be destroyed subsequently.
4106 Returns an initializer expression to use to initialize DECL, or
4107 NULL if the initialization can be performed statically.
4109 Quotes on semantics can be found in ARM 8.4.3. */
4112 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4116 if (init == NULL_TREE)
4118 if ((DECL_LANG_SPECIFIC (decl) == 0
4119 || DECL_IN_AGGR_P (decl) == 0)
4120 && ! DECL_THIS_EXTERN (decl))
4121 error ("%qD declared as reference but not initialized", decl);
4125 if (TREE_CODE (init) == CONSTRUCTOR)
4127 error ("ISO C++ forbids use of initializer list to "
4128 "initialize reference %qD", decl);
4132 if (TREE_CODE (init) == TREE_LIST)
4133 init = build_x_compound_expr_from_list (init, "initializer");
4135 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4136 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4137 /* Note: default conversion is only called in very special cases. */
4138 init = decay_conversion (init);
4140 /* Convert INIT to the reference type TYPE. This may involve the
4141 creation of a temporary, whose lifetime must be the same as that
4142 of the reference. If so, a DECL_EXPR for the temporary will be
4143 added just after the DECL_EXPR for DECL. That's why we don't set
4144 DECL_INITIAL for local references (instead assigning to them
4145 explicitly); we need to allow the temporary to be initialized
4147 tmp = initialize_reference (type, init, decl, cleanup);
4149 if (tmp == error_mark_node)
4151 else if (tmp == NULL_TREE)
4153 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4157 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4160 DECL_INITIAL (decl) = tmp;
4165 /* Designated initializers in arrays are not supported in GNU C++.
4166 The parser cannot detect this error since it does not know whether
4167 a given brace-enclosed initializer is for a class type or for an
4168 array. This function checks that CE does not use a designated
4169 initializer. If it does, an error is issued. Returns true if CE
4170 is valid, i.e., does not have a designated initializer. */
4173 check_array_designated_initializer (const constructor_elt *ce)
4175 /* Designated initializers for array elements arenot supported. */
4178 /* The parser only allows identifiers as designated
4180 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4181 error ("name %qD used in a GNU-style designated "
4182 "initializer for an array", ce->index);
4189 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4190 array until we finish parsing the initializer. If that's the
4191 situation we're in, update DECL accordingly. */
4194 maybe_deduce_size_from_array_init (tree decl, tree init)
4196 tree type = TREE_TYPE (decl);
4198 if (TREE_CODE (type) == ARRAY_TYPE
4199 && TYPE_DOMAIN (type) == NULL_TREE
4200 && TREE_CODE (decl) != TYPE_DECL)
4202 /* do_default is really a C-ism to deal with tentative definitions.
4203 But let's leave it here to ease the eventual merge. */
4204 int do_default = !DECL_EXTERNAL (decl);
4205 tree initializer = init ? init : DECL_INITIAL (decl);
4208 /* Check that there are no designated initializers in INIT, as
4209 those are not supported in GNU C++, and as the middle-end
4210 will crash if presented with a non-numeric designated
4212 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4214 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4215 constructor_elt *ce;
4218 VEC_iterate (constructor_elt, v, i, ce);
4220 if (!check_array_designated_initializer (ce))
4226 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4230 error ("initializer fails to determine size of %qD", decl);
4231 TREE_TYPE (decl) = error_mark_node;
4233 else if (failure == 2)
4237 error ("array size missing in %qD", decl);
4238 TREE_TYPE (decl) = error_mark_node;
4240 /* If a `static' var's size isn't known, make it extern as
4241 well as static, so it does not get allocated. If it's not
4242 `static', then don't mark it extern; finish_incomplete_decl
4243 will give it a default size and it will get allocated. */
4244 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4245 DECL_EXTERNAL (decl) = 1;
4247 else if (failure == 3)
4249 error ("zero-size array %qD", decl);
4250 TREE_TYPE (decl) = error_mark_node;
4254 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4256 layout_decl (decl, 0);
4260 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4261 any appropriate error messages regarding the layout. */
4264 layout_var_decl (tree decl)
4268 type = TREE_TYPE (decl);
4269 if (type == error_mark_node)
4272 /* If we haven't already layed out this declaration, do so now.
4273 Note that we must not call complete type for an external object
4274 because it's type might involve templates that we are not
4275 supposed to instantiate yet. (And it's perfectly valid to say
4276 `extern X x' for some incomplete type `X'.) */
4277 if (!DECL_EXTERNAL (decl))
4278 complete_type (type);
4279 if (!DECL_SIZE (decl)
4280 && TREE_TYPE (decl) != error_mark_node
4281 && (COMPLETE_TYPE_P (type)
4282 || (TREE_CODE (type) == ARRAY_TYPE
4283 && !TYPE_DOMAIN (type)
4284 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4285 layout_decl (decl, 0);
4287 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4289 /* An automatic variable with an incomplete type: that is an error.
4290 Don't talk about array types here, since we took care of that
4291 message in grokdeclarator. */
4292 error ("storage size of %qD isn't known", decl);
4293 TREE_TYPE (decl) = error_mark_node;
4296 /* Keep this code around in case we later want to control debug info
4297 based on whether a type is "used". (jason 1999-11-11) */
4299 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
4300 /* Let debugger know it should output info for this type. */
4301 note_debug_info_needed (ttype);
4303 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4304 note_debug_info_needed (DECL_CONTEXT (decl));
4307 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4308 && DECL_SIZE (decl) != NULL_TREE
4309 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4311 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4312 constant_expression_warning (DECL_SIZE (decl));
4314 error ("storage size of %qD isn't constant", decl);
4318 /* If a local static variable is declared in an inline function, or if
4319 we have a weak definition, we must endeavor to create only one
4320 instance of the variable at link-time. */
4323 maybe_commonize_var (tree decl)
4325 /* Static data in a function with comdat linkage also has comdat
4327 if (TREE_STATIC (decl)
4328 /* Don't mess with __FUNCTION__. */
4329 && ! DECL_ARTIFICIAL (decl)
4330 && DECL_FUNCTION_SCOPE_P (decl)
4331 /* Unfortunately, import_export_decl has not always been called
4332 before the function is processed, so we cannot simply check
4334 && (DECL_COMDAT (DECL_CONTEXT (decl))
4335 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4336 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4337 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4341 /* With weak symbols, we simply make the variable COMDAT;
4342 that will cause copies in multiple translations units to
4344 comdat_linkage (decl);
4348 if (DECL_INITIAL (decl) == NULL_TREE
4349 || DECL_INITIAL (decl) == error_mark_node)
4351 /* Without weak symbols, we can use COMMON to merge
4352 uninitialized variables. */
4353 TREE_PUBLIC (decl) = 1;
4354 DECL_COMMON (decl) = 1;
4358 /* While for initialized variables, we must use internal
4359 linkage -- which means that multiple copies will not
4361 TREE_PUBLIC (decl) = 0;
4362 DECL_COMMON (decl) = 0;
4363 warning (0, "sorry: semantics of inline function static "
4364 "data %q+#D are wrong (you'll wind up "
4365 "with multiple copies)", decl);
4366 warning (0, "%J you can work around this by removing "
4372 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4373 /* Set it up again; we might have set DECL_INITIAL since the last
4375 comdat_linkage (decl);
4378 /* Issue an error message if DECL is an uninitialized const variable. */
4381 check_for_uninitialized_const_var (tree decl)
4383 tree type = TREE_TYPE (decl);
4385 /* ``Unless explicitly declared extern, a const object does not have
4386 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4388 if (TREE_CODE (decl) == VAR_DECL
4389 && TREE_CODE (type) != REFERENCE_TYPE
4390 && CP_TYPE_CONST_P (type)
4391 && !TYPE_NEEDS_CONSTRUCTING (type)
4392 && !DECL_INITIAL (decl))
4393 error ("uninitialized const %qD", decl);
4397 /* Structure holding the current initializer being processed by reshape_init.
4398 CUR is a pointer to the current element being processed, END is a pointer
4399 after the last element present in the initializer. */
4400 typedef struct reshape_iterator_t
4402 constructor_elt *cur;
4403 constructor_elt *end;
4406 static tree reshape_init_r (tree, reshape_iter *, bool);
4408 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4409 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4410 initialized. If there are no more such fields, the return value
4414 next_initializable_field (tree field)
4417 && (TREE_CODE (field) != FIELD_DECL
4418 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4419 || DECL_ARTIFICIAL (field)))
4420 field = TREE_CHAIN (field);
4425 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4426 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4427 INTEGER_CST representing the size of the array minus one (the maximum index),
4428 or NULL_TREE if the array was declared without specifying the size. D is
4429 the iterator within the constructor. */
4432 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4435 bool sized_array_p = (max_index != NULL_TREE);
4436 unsigned HOST_WIDE_INT max_index_cst = 0;
4437 unsigned HOST_WIDE_INT index;
4439 /* The initializer for an array is always a CONSTRUCTOR. */
4440 new_init = build_constructor (NULL_TREE, NULL);
4444 /* Minus 1 is used for zero sized arrays. */
4445 if (integer_all_onesp (max_index))
4448 if (host_integerp (max_index, 1))
4449 max_index_cst = tree_low_cst (max_index, 1);
4450 /* sizetype is sign extended, not zero extended. */
4452 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4456 /* Loop until there are no more initializers. */
4458 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4463 check_array_designated_initializer (d->cur);
4464 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4465 if (elt_init == error_mark_node)
4466 return error_mark_node;
4467 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4473 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4474 Parameters are the same of reshape_init_r. */
4477 reshape_init_array (tree type, reshape_iter *d)
4479 tree max_index = NULL_TREE;
4481 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4483 if (TYPE_DOMAIN (type))
4484 max_index = array_type_nelts (type);
4486 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4489 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4490 Parameters are the same of reshape_init_r. */
4493 reshape_init_vector (tree type, reshape_iter *d)
4495 tree max_index = NULL_TREE;
4498 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4500 if (COMPOUND_LITERAL_P (d->cur->value))
4502 tree value = d->cur->value;
4503 if (!same_type_p (TREE_TYPE (value), type))
4505 error ("invalid type %qT as initializer for a vector of type %qT",
4506 TREE_TYPE (d->cur->value), type);
4507 value = error_mark_node;
4513 /* For a vector, the representation type is a struct
4514 containing a single member which is an array of the
4515 appropriate size. */
4516 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4517 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4518 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4520 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4523 /* Subroutine of reshape_init_r, processes the initializers for classes
4524 or union. Parameters are the same of reshape_init_r. */
4527 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4532 gcc_assert (CLASS_TYPE_P (type));
4534 /* The initializer for a class is always a CONSTRUCTOR. */
4535 new_init = build_constructor (NULL_TREE, NULL);
4536 field = next_initializable_field (TYPE_FIELDS (type));
4542 An initializer for an aggregate member that is an
4543 empty class shall have the form of an empty
4544 initializer-list {}. */
4545 if (!first_initializer_p)
4547 error ("initializer for %qT must be brace-enclosed", type);
4548 return error_mark_node;
4553 /* Loop through the initializable fields, gathering initializers. */
4554 while (d->cur != d->end)
4558 /* Handle designated initializers, as an extension. */
4561 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4563 if (!field || TREE_CODE (field) != FIELD_DECL)
4565 error ("%qT has no non-static data member named %qD", type,
4567 return error_mark_node;
4571 /* If we processed all the member of the class, we are done. */
4575 field_init = reshape_init_r (TREE_TYPE (field), d,
4576 /*first_initializer_p=*/false);
4577 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4581 When a union is initialized with a brace-enclosed
4582 initializer, the braces shall only contain an
4583 initializer for the first member of the union. */
4584 if (TREE_CODE (type) == UNION_TYPE)
4587 field = next_initializable_field (TREE_CHAIN (field));
4593 /* Subroutine of reshape_init, which processes a single initializer (part of
4594 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4595 iterator within the CONSTRUCTOR which points to the initializer to process.
4596 FIRST_INITIALIZER_P is true if this is the first initializer of the
4597 CONSTRUCTOR node. */
4600 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4602 tree init = d->cur->value;
4604 /* A non-aggregate type is always initialized with a single
4606 if (!CP_AGGREGATE_TYPE_P (type))
4608 /* It is invalid to initialize a non-aggregate type with a
4609 brace-enclosed initializer.
4610 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4611 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4612 a CONSTRUCTOR (with a record type). */
4613 if (TREE_CODE (init) == CONSTRUCTOR
4614 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4616 error ("braces around scalar initializer for type %qT", type);
4617 init = error_mark_node;
4626 All implicit type conversions (clause _conv_) are considered when
4627 initializing the aggregate member with an initializer from an
4628 initializer-list. If the initializer can initialize a member,
4629 the member is initialized. Otherwise, if the member is itself a
4630 non-empty subaggregate, brace elision is assumed and the
4631 initializer is considered for the initialization of the first
4632 member of the subaggregate. */
4633 if (TREE_CODE (init) != CONSTRUCTOR
4634 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4640 /* [dcl.init.string]
4642 A char array (whether plain char, signed char, or unsigned char)
4643 can be initialized by a string-literal (optionally enclosed in
4644 braces); a wchar_t array can be initialized by a wide
4645 string-literal (optionally enclosed in braces). */
4646 if (TREE_CODE (type) == ARRAY_TYPE
4647 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4649 tree str_init = init;
4651 /* Strip one level of braces if and only if they enclose a single
4652 element (as allowed by [dcl.init.string]). */
4653 if (!first_initializer_p
4654 && TREE_CODE (str_init) == CONSTRUCTOR
4655 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4657 str_init = VEC_index (constructor_elt,
4658 CONSTRUCTOR_ELTS (str_init), 0)->value;
4661 /* If it's a string literal, then it's the initializer for the array
4662 as a whole. Otherwise, continue with normal initialization for
4663 array types (one value per array element). */
4664 if (TREE_CODE (str_init) == STRING_CST)
4671 /* The following cases are about aggregates. If we are not within a full
4672 initializer already, and there is not a CONSTRUCTOR, it means that there
4673 is a missing set of braces (that is, we are processing the case for
4674 which reshape_init exists). */
4675 if (!first_initializer_p)
4677 if (TREE_CODE (init) == CONSTRUCTOR)
4679 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4680 /* There is no need to reshape pointer-to-member function
4681 initializers, as they are always constructed correctly
4682 by the front end. */
4684 else if (COMPOUND_LITERAL_P (init))
4685 /* For a nested compound literal, there is no need to reshape since
4686 brace elision is not allowed. Even if we decided to allow it,
4687 we should add a call to reshape_init in finish_compound_literal,
4688 before calling digest_init, so changing this code would still
4689 not be necessary. */
4690 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4694 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4695 return reshape_init (type, init);
4699 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4703 /* Dispatch to specialized routines. */
4704 if (CLASS_TYPE_P (type))
4705 return reshape_init_class (type, d, first_initializer_p);
4706 else if (TREE_CODE (type) == ARRAY_TYPE)
4707 return reshape_init_array (type, d);
4708 else if (TREE_CODE (type) == VECTOR_TYPE)
4709 return reshape_init_vector (type, d);
4714 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4715 brace-enclosed aggregate initializer.
4717 INIT is the CONSTRUCTOR containing the list of initializers describing
4718 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4719 It may not presently match the shape of the TYPE; for example:
4721 struct S { int a; int b; };
4722 struct S a[] = { 1, 2, 3, 4 };
4724 Here INIT will hold a VEC of four elements, rather than a
4725 VEC of two elements, each itself a VEC of two elements. This
4726 routine transforms INIT from the former form into the latter. The
4727 revised CONSTRUCTOR node is returned. */
4730 reshape_init (tree type, tree init)
4732 VEC(constructor_elt, gc) *v;
4736 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4738 v = CONSTRUCTOR_ELTS (init);
4740 /* An empty constructor does not need reshaping, and it is always a valid
4742 if (VEC_empty (constructor_elt, v))
4745 /* Recurse on this CONSTRUCTOR. */
4746 d.cur = VEC_index (constructor_elt, v, 0);
4747 d.end = d.cur + VEC_length (constructor_elt, v);
4749 new_init = reshape_init_r (type, &d, true);
4750 if (new_init == error_mark_node)
4751 return error_mark_node;
4753 /* Make sure all the element of the constructor were used. Otherwise,
4754 issue an error about exceeding initializers. */
4756 error ("too many initializers for %qT", type);
4761 /* Verify INIT (the initializer for DECL), and record the
4762 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4763 grok_reference_init.
4765 If the return value is non-NULL, it is an expression that must be
4766 evaluated dynamically to initialize DECL. */
4769 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4771 tree type = TREE_TYPE (decl);
4772 tree init_code = NULL;
4774 /* Things that are going to be initialized need to have complete
4776 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4778 if (type == error_mark_node)
4779 /* We will have already complained. */
4782 if (TREE_CODE (type) == ARRAY_TYPE)
4784 tree element_type = TREE_TYPE (type);
4786 /* The array type itself need not be complete, because the
4787 initializer may tell us how many elements are in the array.
4788 But, the elements of the array must be complete. */
4789 if (!COMPLETE_TYPE_P (complete_type (element_type)))
4791 error ("elements of array %q#D have incomplete type", decl);
4794 /* It is not valid to initialize an a VLA. */
4796 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
4797 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
4799 error ("variable-sized object %qD may not be initialized", decl);
4803 else if (!COMPLETE_TYPE_P (type))
4805 error ("%qD has incomplete type", decl);
4806 TREE_TYPE (decl) = error_mark_node;
4810 /* There is no way to make a variable-sized class type in GNU C++. */
4811 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
4813 if (!CP_AGGREGATE_TYPE_P (type)
4814 && init && BRACE_ENCLOSED_INITIALIZER_P (init)
4815 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)) != 1)
4817 error ("scalar object %qD requires one element in initializer", decl);
4818 TREE_TYPE (decl) = error_mark_node;
4822 if (TREE_CODE (decl) == CONST_DECL)
4824 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
4826 DECL_INITIAL (decl) = init;
4828 gcc_assert (init != NULL_TREE);
4831 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4832 init = grok_reference_init (decl, type, init, cleanup);
4835 /* Do not reshape constructors of vectors (they don't need to be
4837 if (TREE_CODE (init) == CONSTRUCTOR
4838 && !COMPOUND_LITERAL_P (init)
4839 && !TREE_TYPE (init)) /* ptrmemfunc */
4841 init = reshape_init (type, init);
4843 if ((*targetm.vector_opaque_p) (type))
4845 error ("opaque vector types cannot be initialized");
4846 init = error_mark_node;
4850 /* If DECL has an array type without a specific bound, deduce the
4851 array size from the initializer. */
4852 maybe_deduce_size_from_array_init (decl, init);
4853 type = TREE_TYPE (decl);
4854 if (type == error_mark_node)
4857 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4859 if (TREE_CODE (type) == ARRAY_TYPE)
4860 goto initialize_aggr;
4861 else if (TREE_CODE (init) == CONSTRUCTOR)
4863 if (TYPE_NON_AGGREGATE_CLASS (type))
4865 error ("%qD must be initialized by constructor, "
4868 init = error_mark_node;
4871 goto dont_use_constructor;
4875 int saved_stmts_are_full_exprs_p;
4878 saved_stmts_are_full_exprs_p = 0;
4879 if (building_stmt_tree ())
4881 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4882 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4884 init = build_aggr_init (decl, init, flags);
4885 if (building_stmt_tree ())
4886 current_stmt_tree ()->stmts_are_full_exprs_p =
4887 saved_stmts_are_full_exprs_p;
4893 dont_use_constructor:
4894 if (TREE_CODE (init) != TREE_VEC)
4896 init_code = store_init_value (decl, init);
4897 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
4898 && DECL_INITIAL (decl)
4899 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
4900 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
4901 warning (0, "array %qD initialized by parenthesized string literal %qE",
4902 decl, DECL_INITIAL (decl));
4907 else if (DECL_EXTERNAL (decl))
4909 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4910 goto initialize_aggr;
4911 else if (IS_AGGR_TYPE (type))
4913 tree core_type = strip_array_types (type);
4915 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4916 error ("structure %qD with uninitialized const members", decl);
4917 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4918 error ("structure %qD with uninitialized reference members", decl);
4920 check_for_uninitialized_const_var (decl);
4923 check_for_uninitialized_const_var (decl);
4925 if (init && init != error_mark_node)
4926 init_code = build2 (INIT_EXPR, type, decl, init);
4931 /* If DECL is not a local variable, give it RTL. */
4934 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4936 int toplev = toplevel_bindings_p ();
4938 const char *filename;
4940 /* Set the DECL_ASSEMBLER_NAME for the object. */
4943 /* The `register' keyword, when used together with an
4944 asm-specification, indicates that the variable should be
4945 placed in a particular register. */
4946 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
4948 set_user_assembler_name (decl, asmspec);
4949 DECL_HARD_REGISTER (decl) = 1;
4953 if (TREE_CODE (decl) == FUNCTION_DECL
4954 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
4955 set_builtin_user_assembler_name (decl, asmspec);
4956 set_user_assembler_name (decl, asmspec);
4960 /* Handle non-variables up front. */
4961 if (TREE_CODE (decl) != VAR_DECL)
4963 rest_of_decl_compilation (decl, toplev, at_eof);
4967 /* If we see a class member here, it should be a static data
4969 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4971 gcc_assert (TREE_STATIC (decl));
4972 /* An in-class declaration of a static data member should be
4973 external; it is only a declaration, and not a definition. */
4974 if (init == NULL_TREE)
4975 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
4978 /* We don't create any RTL for local variables. */
4979 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4982 /* We defer emission of local statics until the corresponding
4983 DECL_EXPR is expanded. */
4984 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4986 /* We try to defer namespace-scope static constants so that they are
4987 not emitted into the object file unnecessarily. */
4988 filename = input_filename;
4989 if (!DECL_VIRTUAL_P (decl)
4990 && TREE_READONLY (decl)
4991 && DECL_INITIAL (decl) != NULL_TREE
4992 && DECL_INITIAL (decl) != error_mark_node
4994 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4996 && !TREE_PUBLIC (decl))
4998 /* Fool with the linkage of static consts according to #pragma
5000 struct c_fileinfo *finfo = get_fileinfo (filename);
5001 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5003 TREE_PUBLIC (decl) = 1;
5004 DECL_EXTERNAL (decl) = finfo->interface_only;
5009 /* Likewise for template instantiations. */
5010 else if (DECL_LANG_SPECIFIC (decl)
5011 && DECL_IMPLICIT_INSTANTIATION (decl))
5014 /* If we're not deferring, go ahead and assemble the variable. */
5016 rest_of_decl_compilation (decl, toplev, at_eof);
5019 /* Generate code to initialize DECL (a local variable). */
5022 initialize_local_var (tree decl, tree init)
5024 tree type = TREE_TYPE (decl);
5027 gcc_assert (TREE_CODE (decl) == VAR_DECL
5028 || TREE_CODE (decl) == RESULT_DECL);
5029 gcc_assert (!TREE_STATIC (decl));
5031 if (DECL_SIZE (decl) == NULL_TREE)
5033 /* If we used it already as memory, it must stay in memory. */
5034 DECL_INITIAL (decl) = NULL_TREE;
5035 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5038 if (DECL_SIZE (decl) && type != error_mark_node)
5042 /* Compute and store the initial value. */
5043 already_used = TREE_USED (decl) || TREE_USED (type);
5045 /* Perform the initialization. */
5048 int saved_stmts_are_full_exprs_p;
5050 gcc_assert (building_stmt_tree ());
5051 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5052 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5053 finish_expr_stmt (init);
5054 current_stmt_tree ()->stmts_are_full_exprs_p =
5055 saved_stmts_are_full_exprs_p;
5058 /* Set this to 0 so we can tell whether an aggregate which was
5059 initialized was ever used. Don't do this if it has a
5060 destructor, so we don't complain about the 'resource
5061 allocation is initialization' idiom. Now set
5062 attribute((unused)) on types so decls of that type will be
5063 marked used. (see TREE_USED, above.) */
5064 if (TYPE_NEEDS_CONSTRUCTING (type)
5066 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5067 && DECL_NAME (decl))
5068 TREE_USED (decl) = 0;
5069 else if (already_used)
5070 TREE_USED (decl) = 1;
5073 /* Generate a cleanup, if necessary. */
5074 cleanup = cxx_maybe_build_cleanup (decl);
5075 if (DECL_SIZE (decl) && cleanup)
5076 finish_decl_cleanup (decl, cleanup);
5079 /* DECL is a VAR_DECL for a compiler-generated variable with static
5080 storage duration (like a virtual table) whose initializer is a
5081 compile-time constant. INIT must be either a TREE_LIST of values,
5082 or a CONSTRUCTOR. Initialize the variable and provide it to the
5086 initialize_artificial_var (tree decl, tree init)
5088 gcc_assert (DECL_ARTIFICIAL (decl));
5089 if (TREE_CODE (init) == TREE_LIST)
5090 init = build_constructor_from_list (NULL_TREE, init);
5091 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5092 DECL_INITIAL (decl) = init;
5093 DECL_INITIALIZED_P (decl) = 1;
5094 determine_visibility (decl);
5095 layout_var_decl (decl);
5096 maybe_commonize_var (decl);
5097 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5100 /* INIT is the initializer for a variable, as represented by the
5101 parser. Returns true iff INIT is value-dependent. */
5104 value_dependent_init_p (tree init)
5106 if (TREE_CODE (init) == TREE_LIST)
5107 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5108 return any_value_dependent_elements_p (init);
5109 else if (TREE_CODE (init) == CONSTRUCTOR)
5110 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5112 VEC(constructor_elt, gc) *elts;
5116 elts = CONSTRUCTOR_ELTS (init);
5117 nelts = VEC_length (constructor_elt, elts);
5118 for (i = 0; i < nelts; ++i)
5119 if (value_dependent_init_p (VEC_index (constructor_elt,
5124 /* It must be a simple expression, e.g., int i = 3; */
5125 return value_dependent_expression_p (init);
5130 /* Finish processing of a declaration;
5131 install its line number and initial value.
5132 If the length of an array type is not known before,
5133 it must be determined now, from the initial value, or it is an error.
5135 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5136 true, then INIT is an integral constant expression.
5138 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5139 if the (init) syntax was used. */
5142 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5143 tree asmspec_tree, int flags)
5147 const char *asmspec = NULL;
5148 int was_readonly = 0;
5149 bool var_definition_p = false;
5150 int saved_processing_template_decl;
5152 if (decl == error_mark_node)
5157 error ("assignment (not initialization) in declaration");
5161 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5162 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5163 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5165 type = TREE_TYPE (decl);
5166 if (type == error_mark_node)
5169 /* Assume no cleanup is required. */
5170 cleanup = NULL_TREE;
5171 saved_processing_template_decl = processing_template_decl;
5173 /* If a name was specified, get the string. */
5174 if (global_scope_p (current_binding_level))
5175 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5176 if (asmspec_tree && asmspec_tree != error_mark_node)
5177 asmspec = TREE_STRING_POINTER (asmspec_tree);
5179 if (current_class_type
5180 && CP_DECL_CONTEXT (decl) == current_class_type
5181 && TYPE_BEING_DEFINED (current_class_type)
5182 && (DECL_INITIAL (decl) || init))
5183 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5185 if (processing_template_decl)
5187 bool type_dependent_p;
5189 /* Add this declaration to the statement-tree. */
5190 if (at_function_scope_p ())
5191 add_decl_expr (decl);
5193 type_dependent_p = dependent_type_p (type);
5195 if (init && init_const_expr_p)
5197 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5198 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5199 TREE_CONSTANT (decl) = 1;
5202 /* Generally, initializers in templates are expanded when the
5203 template is instantiated. But, if DECL is an integral
5204 constant static data member, then it can be used in future
5205 integral constant expressions, and its value must be
5208 && DECL_CLASS_SCOPE_P (decl)
5209 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5210 && !type_dependent_p
5211 && !value_dependent_init_p (init)))
5214 DECL_INITIAL (decl) = init;
5215 if (TREE_CODE (decl) == VAR_DECL
5216 && !DECL_PRETTY_FUNCTION_P (decl)
5217 && !type_dependent_p)
5218 maybe_deduce_size_from_array_init (decl, init);
5222 init = fold_non_dependent_expr (init);
5223 processing_template_decl = 0;
5226 /* Take care of TYPE_DECLs up front. */
5227 if (TREE_CODE (decl) == TYPE_DECL)
5229 if (type != error_mark_node
5230 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
5232 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5233 warning (0, "shadowing previous type declaration of %q#D", decl);
5234 set_identifier_type_value (DECL_NAME (decl), decl);
5237 /* If we have installed this as the canonical typedef for this
5238 type, and that type has not been defined yet, delay emitting
5239 the debug information for it, as we will emit it later. */
5240 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5241 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5242 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5244 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5249 /* A reference will be modified here, as it is initialized. */
5250 if (! DECL_EXTERNAL (decl)
5251 && TREE_READONLY (decl)
5252 && TREE_CODE (type) == REFERENCE_TYPE)
5255 TREE_READONLY (decl) = 0;
5258 if (TREE_CODE (decl) == VAR_DECL)
5260 /* Only PODs can have thread-local storage. Other types may require
5261 various kinds of non-trivial initialization. */
5262 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5263 error ("%qD cannot be thread-local because it has non-POD type %qT",
5264 decl, TREE_TYPE (decl));
5265 /* If this is a local variable that will need a mangled name,
5266 register it now. We must do this before processing the
5267 initializer for the variable, since the initialization might
5268 require a guard variable, and since the mangled name of the
5269 guard variable will depend on the mangled name of this
5271 if (!processing_template_decl
5272 && DECL_FUNCTION_SCOPE_P (decl)
5273 && TREE_STATIC (decl)
5274 && !DECL_ARTIFICIAL (decl))
5275 push_local_name (decl);
5276 /* Convert the initializer to the type of DECL, if we have not
5277 already initialized DECL. */
5278 if (!DECL_INITIALIZED_P (decl)
5279 /* If !DECL_EXTERNAL then DECL is being defined. In the
5280 case of a static data member initialized inside the
5281 class-specifier, there can be an initializer even if DECL
5282 is *not* defined. */
5283 && (!DECL_EXTERNAL (decl) || init))
5287 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5288 if (init_const_expr_p)
5290 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5291 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5292 TREE_CONSTANT (decl) = 1;
5295 init = check_initializer (decl, init, flags, &cleanup);
5296 /* Thread-local storage cannot be dynamically initialized. */
5297 if (DECL_THREAD_LOCAL_P (decl) && init)
5299 error ("%qD is thread-local and so cannot be dynamically "
5300 "initialized", decl);
5304 /* Check that the initializer for a static data member was a
5305 constant. Although we check in the parser that the
5306 initializer is an integral constant expression, we do not
5307 simplify division-by-zero at the point at which it
5308 occurs. Therefore, in:
5310 struct S { static const int i = 7 / 0; };
5312 we issue an error at this point. It would
5313 probably be better to forbid division by zero in
5314 integral constant expressions. */
5315 if (DECL_EXTERNAL (decl) && init)
5317 error ("%qD cannot be initialized by a non-constant expression"
5318 " when being declared", decl);
5319 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5327 The memory occupied by any object of static storage
5328 duration is zero-initialized at program startup before
5329 any other initialization takes place.
5331 We cannot create an appropriate initializer until after
5332 the type of DECL is finalized. If DECL_INITIAL is set,
5333 then the DECL is statically initialized, and any
5334 necessary zero-initialization has already been performed. */
5335 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5336 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5337 /*nelts=*/NULL_TREE,
5338 /*static_storage_p=*/true);
5339 /* Remember that the initialization for this variable has
5341 DECL_INITIALIZED_P (decl) = 1;
5342 /* This declaration is the definition of this variable,
5343 unless we are initializing a static data member within
5344 the class specifier. */
5345 if (!DECL_EXTERNAL (decl))
5346 var_definition_p = true;
5348 /* If the variable has an array type, lay out the type, even if
5349 there is no initializer. It is valid to index through the
5350 array, and we must get TYPE_ALIGN set correctly on the array
5352 else if (TREE_CODE (type) == ARRAY_TYPE)
5356 /* Add this declaration to the statement-tree. This needs to happen
5357 after the call to check_initializer so that the DECL_EXPR for a
5358 reference temp is added before the DECL_EXPR for the reference itself. */
5359 if (at_function_scope_p ())
5360 add_decl_expr (decl);
5362 /* Let the middle end know about variables and functions -- but not
5363 static data members in uninstantiated class templates. */
5364 if (!saved_processing_template_decl
5365 && (TREE_CODE (decl) == VAR_DECL
5366 || TREE_CODE (decl) == FUNCTION_DECL))
5368 if (TREE_CODE (decl) == VAR_DECL)
5370 layout_var_decl (decl);
5371 maybe_commonize_var (decl);
5374 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5376 /* Check for abstractness of the type. Notice that there is no
5377 need to strip array types here since the check for those types
5378 is already done within create_array_type_for_decl. */
5379 if (TREE_CODE (type) == FUNCTION_TYPE
5380 || TREE_CODE (type) == METHOD_TYPE)
5381 abstract_virtuals_error (decl, TREE_TYPE (type));
5383 abstract_virtuals_error (decl, type);
5385 /* This needs to happen after the linkage is set. */
5386 determine_visibility (decl);
5388 if (TREE_CODE (decl) == FUNCTION_DECL
5389 || TREE_TYPE (decl) == error_mark_node)
5390 /* No initialization required. */
5392 else if (DECL_EXTERNAL (decl)
5393 && ! (DECL_LANG_SPECIFIC (decl)
5394 && DECL_NOT_REALLY_EXTERN (decl)))
5397 DECL_INITIAL (decl) = init;
5401 /* A variable definition. */
5402 if (DECL_FUNCTION_SCOPE_P (decl))
5404 /* Initialize the local variable. */
5405 if (processing_template_decl)
5406 DECL_INITIAL (decl) = init;
5407 else if (!TREE_STATIC (decl))
5408 initialize_local_var (decl, init);
5411 /* If a variable is defined, and then a subsequent
5412 definition with external linkage is encountered, we will
5413 get here twice for the same variable. We want to avoid
5414 calling expand_static_init more than once. For variables
5415 that are not static data members, we can call
5416 expand_static_init only when we actually process the
5417 initializer. It is not legal to redeclare a static data
5418 member, so this issue does not arise in that case. */
5419 if (var_definition_p && TREE_STATIC (decl))
5421 /* If a TREE_READONLY variable needs initialization
5422 at runtime, it is no longer readonly and we need to
5423 avoid MEM_READONLY_P being set on RTL created for it. */
5426 if (TREE_READONLY (decl))
5427 TREE_READONLY (decl) = 0;
5430 expand_static_init (decl, init);
5435 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5436 reference, insert it in the statement-tree now. */
5438 push_cleanup (decl, cleanup, false);
5441 processing_template_decl = saved_processing_template_decl;
5444 TREE_READONLY (decl) = 1;
5446 /* If this was marked 'used', be sure it will be output. */
5447 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5448 mark_decl_referenced (decl);
5451 /* This is here for a midend callback from c-common.c. */
5454 finish_decl (tree decl, tree init, tree asmspec_tree)
5456 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5459 /* Returns a declaration for a VAR_DECL as if:
5461 extern "C" TYPE NAME;
5463 had been seen. Used to create compiler-generated global
5467 declare_global_var (tree name, tree type)
5471 push_to_top_level ();
5472 decl = build_decl (VAR_DECL, name, type);
5473 TREE_PUBLIC (decl) = 1;
5474 DECL_EXTERNAL (decl) = 1;
5475 DECL_ARTIFICIAL (decl) = 1;
5476 /* If the user has explicitly declared this variable (perhaps
5477 because the code we are compiling is part of a low-level runtime
5478 library), then it is possible that our declaration will be merged
5479 with theirs by pushdecl. */
5480 decl = pushdecl (decl);
5481 finish_decl (decl, NULL_TREE, NULL_TREE);
5482 pop_from_top_level ();
5487 /* Returns a pointer to the `atexit' function. Note that if
5488 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5489 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5492 get_atexit_node (void)
5499 bool use_aeabi_atexit;
5504 if (flag_use_cxa_atexit)
5506 /* The declaration for `__cxa_atexit' is:
5508 int __cxa_atexit (void (*)(void *), void *, void *)
5510 We build up the argument types and then then function type
5513 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5514 /* First, build the pointer-to-function type for the first
5516 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5517 fn_type = build_function_type (void_type_node, arg_types);
5518 fn_ptr_type = build_pointer_type (fn_type);
5519 /* Then, build the rest of the argument types. */
5520 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5521 if (use_aeabi_atexit)
5523 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5524 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5528 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
5529 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
5531 /* And the final __cxa_atexit type. */
5532 fn_type = build_function_type (integer_type_node, arg_types);
5533 fn_ptr_type = build_pointer_type (fn_type);
5534 if (use_aeabi_atexit)
5535 name = "__aeabi_atexit";
5537 name = "__cxa_atexit";
5541 /* The declaration for `atexit' is:
5543 int atexit (void (*)());
5545 We build up the argument types and then then function type
5547 fn_type = build_function_type (void_type_node, void_list_node);
5548 fn_ptr_type = build_pointer_type (fn_type);
5549 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
5550 /* Build the final atexit type. */
5551 fn_type = build_function_type (integer_type_node, arg_types);
5555 /* Now, build the function declaration. */
5556 push_lang_context (lang_name_c);
5557 atexit_fndecl = build_library_fn_ptr (name, fn_type);
5558 mark_used (atexit_fndecl);
5559 pop_lang_context ();
5560 atexit_node = decay_conversion (atexit_fndecl);
5565 /* Returns the __dso_handle VAR_DECL. */
5568 get_dso_handle_node (void)
5570 if (dso_handle_node)
5571 return dso_handle_node;
5573 /* Declare the variable. */
5574 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5577 return dso_handle_node;
5580 /* Begin a new function with internal linkage whose job will be simply
5581 to destroy some particular variable. */
5583 static GTY(()) int start_cleanup_cnt;
5586 start_cleanup_fn (void)
5593 push_to_top_level ();
5595 /* No need to mangle this. */
5596 push_lang_context (lang_name_c);
5598 /* Build the parameter-types. */
5599 parmtypes = void_list_node;
5600 /* Functions passed to __cxa_atexit take an additional parameter.
5601 We'll just ignore it. After we implement the new calling
5602 convention for destructors, we can eliminate the use of
5603 additional cleanup functions entirely in the -fnew-abi case. */
5604 if (flag_use_cxa_atexit)
5605 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5606 /* Build the function type itself. */
5607 fntype = build_function_type (void_type_node, parmtypes);
5608 /* Build the name of the function. */
5609 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5610 /* Build the function declaration. */
5611 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5612 /* It's a function with internal linkage, generated by the
5614 TREE_PUBLIC (fndecl) = 0;
5615 DECL_ARTIFICIAL (fndecl) = 1;
5616 /* Make the function `inline' so that it is only emitted if it is
5617 actually needed. It is unlikely that it will be inlined, since
5618 it is only called via a function pointer, but we avoid unnecessary
5619 emissions this way. */
5620 DECL_INLINE (fndecl) = 1;
5621 DECL_DECLARED_INLINE_P (fndecl) = 1;
5622 DECL_INTERFACE_KNOWN (fndecl) = 1;
5623 /* Build the parameter. */
5624 if (flag_use_cxa_atexit)
5628 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5629 DECL_CONTEXT (parmdecl) = fndecl;
5630 TREE_USED (parmdecl) = 1;
5631 DECL_ARGUMENTS (fndecl) = parmdecl;
5635 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5637 pop_lang_context ();
5639 return current_function_decl;
5642 /* Finish the cleanup function begun by start_cleanup_fn. */
5645 end_cleanup_fn (void)
5647 expand_or_defer_fn (finish_function (0));
5649 pop_from_top_level ();
5652 /* Generate code to handle the destruction of DECL, an object with
5653 static storage duration. */
5656 register_dtor_fn (tree decl)
5663 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5664 return void_zero_node;
5666 /* Call build_cleanup before we enter the anonymous function so that
5667 any access checks will be done relative to the current scope,
5668 rather than the scope of the anonymous function. */
5669 build_cleanup (decl);
5671 /* Now start the function. */
5672 cleanup = start_cleanup_fn ();
5674 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5675 to the original function, rather than the anonymous one. That
5676 will make the back-end think that nested functions are in use,
5677 which causes confusion. */
5679 push_deferring_access_checks (dk_no_check);
5680 fcall = build_cleanup (decl);
5681 pop_deferring_access_checks ();
5683 /* Create the body of the anonymous function. */
5684 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5685 finish_expr_stmt (fcall);
5686 finish_compound_stmt (compound_stmt);
5689 /* Call atexit with the cleanup function. */
5690 cxx_mark_addressable (cleanup);
5691 mark_used (cleanup);
5692 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5693 if (flag_use_cxa_atexit)
5695 args = tree_cons (NULL_TREE,
5696 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5698 if (targetm.cxx.use_aeabi_atexit ())
5700 args = tree_cons (NULL_TREE, cleanup, args);
5701 args = tree_cons (NULL_TREE, null_pointer_node, args);
5705 args = tree_cons (NULL_TREE, null_pointer_node, args);
5706 args = tree_cons (NULL_TREE, cleanup, args);
5710 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5711 return build_function_call (get_atexit_node (), args);
5714 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5715 is its initializer. Generate code to handle the construction
5716 and destruction of DECL. */
5719 expand_static_init (tree decl, tree init)
5721 gcc_assert (TREE_CODE (decl) == VAR_DECL);
5722 gcc_assert (TREE_STATIC (decl));
5724 /* Some variables require no initialization. */
5726 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5727 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5730 if (DECL_FUNCTION_SCOPE_P (decl))
5732 /* Emit code to perform this initialization but once. */
5733 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
5734 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
5735 tree guard, guard_addr, guard_addr_list;
5736 tree acquire_fn, release_fn, abort_fn;
5739 /* Emit code to perform this initialization but once. This code
5742 static <type> guard;
5743 if (!guard.first_byte) {
5744 if (__cxa_guard_acquire (&guard)) {
5747 // Do initialization.
5748 flag = true; __cxa_guard_release (&guard);
5749 // Register variable for destruction at end of program.
5751 if (!flag) __cxa_guard_abort (&guard);
5755 Note that the `flag' variable is only set to 1 *after* the
5756 initialization is complete. This ensures that an exception,
5757 thrown during the construction, will cause the variable to
5758 reinitialized when we pass through this code again, as per:
5762 If the initialization exits by throwing an exception, the
5763 initialization is not complete, so it will be tried again
5764 the next time control enters the declaration.
5766 This process should be thread-safe, too; multiple threads
5767 should not be able to initialize the variable more than
5770 /* Create the guard variable. */
5771 guard = get_guard (decl);
5773 /* This optimization isn't safe on targets with relaxed memory
5774 consistency. On such targets we force synchronization in
5775 __cxa_guard_acquire. */
5776 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5778 /* Begin the conditional initialization. */
5779 if_stmt = begin_if_stmt ();
5780 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5781 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5784 if (flag_threadsafe_statics)
5786 guard_addr = build_address (guard);
5787 guard_addr_list = build_tree_list (NULL_TREE, guard_addr);
5789 acquire_fn = get_identifier ("__cxa_guard_acquire");
5790 release_fn = get_identifier ("__cxa_guard_release");
5791 abort_fn = get_identifier ("__cxa_guard_abort");
5792 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
5794 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
5796 tree vfntype = build_function_type (void_type_node, argtypes);
5797 acquire_fn = push_library_fn
5798 (acquire_fn, build_function_type (integer_type_node, argtypes));
5799 release_fn = push_library_fn (release_fn, vfntype);
5800 abort_fn = push_library_fn (abort_fn, vfntype);
5804 release_fn = identifier_global_value (release_fn);
5805 abort_fn = identifier_global_value (abort_fn);
5808 inner_if_stmt = begin_if_stmt ();
5809 finish_if_stmt_cond (build_call (acquire_fn, guard_addr_list),
5812 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
5813 begin = get_target_expr (boolean_false_node);
5814 flag = TARGET_EXPR_SLOT (begin);
5816 TARGET_EXPR_CLEANUP (begin)
5817 = build3 (COND_EXPR, void_type_node, flag,
5819 build_call (abort_fn, guard_addr_list));
5820 CLEANUP_EH_ONLY (begin) = 1;
5822 /* Do the initialization itself. */
5823 init = add_stmt_to_compound (begin, init);
5824 init = add_stmt_to_compound
5825 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
5826 init = add_stmt_to_compound
5827 (init, build_call (release_fn, guard_addr_list));
5830 init = add_stmt_to_compound (init, set_guard (guard));
5832 /* Use atexit to register a function for destroying this static
5834 init = add_stmt_to_compound (init, register_dtor_fn (decl));
5836 finish_expr_stmt (init);
5838 if (flag_threadsafe_statics)
5840 finish_compound_stmt (inner_then_clause);
5841 finish_then_clause (inner_if_stmt);
5842 finish_if_stmt (inner_if_stmt);
5845 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
5847 finish_compound_stmt (then_clause);
5848 finish_then_clause (if_stmt);
5849 finish_if_stmt (if_stmt);
5853 static_aggregates = tree_cons (init, decl, static_aggregates);
5857 /* Make TYPE a complete type based on INITIAL_VALUE.
5858 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5859 2 if there was no information (in which case assume 0 if DO_DEFAULT),
5860 3 if the initializer list is empty (in pedantic mode). */
5863 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
5866 tree type, elt_type;
5870 /* An array of character type can be initialized from a
5871 brace-enclosed string constant.
5873 FIXME: this code is duplicated from reshape_init. Probably
5874 we should just call reshape_init here? */
5875 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
5876 && TREE_CODE (initial_value) == CONSTRUCTOR
5877 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
5879 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
5880 tree value = VEC_index (constructor_elt, v, 0)->value;
5882 if (TREE_CODE (value) == STRING_CST
5883 && VEC_length (constructor_elt, v) == 1)
5884 initial_value = value;
5888 failure = complete_array_type (ptype, initial_value, do_default);
5890 /* We can create the array before the element type is complete, which
5891 means that we didn't have these two bits set in the original type
5892 either. In completing the type, we are expected to propagate these
5893 bits. See also complete_type which does the same thing for arrays
5896 if (TYPE_DOMAIN (type))
5898 elt_type = TREE_TYPE (type);
5899 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
5900 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5901 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
5907 /* Return zero if something is declared to be a member of type
5908 CTYPE when in the context of CUR_TYPE. STRING is the error
5909 message to print in that case. Otherwise, quietly return 1. */
5912 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5914 if (ctype && ctype != cur_type)
5916 if (flags == DTOR_FLAG)
5917 error ("destructor for alien class %qT cannot be a member", ctype);
5919 error ("constructor for alien class %qT cannot be a member", ctype);
5925 /* Subroutine of `grokdeclarator'. */
5927 /* Generate errors possibly applicable for a given set of specifiers.
5928 This is for ARM $7.1.2. */
5931 bad_specifiers (tree object,
5940 error ("%qD declared as a %<virtual%> %s", object, type);
5942 error ("%qD declared as an %<inline%> %s", object, type);
5944 error ("%<const%> and %<volatile%> function specifiers on "
5945 "%qD invalid in %s declaration",
5948 error ("%q+D declared as a friend", object);
5950 && (TREE_CODE (object) == TYPE_DECL
5951 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5952 && !TYPE_REFFN_P (TREE_TYPE (object))
5953 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5954 error ("%q+D declared with an exception specification", object);
5957 /* DECL is a member function or static data member and is presently
5958 being defined. Check that the definition is taking place in a
5962 check_class_member_definition_namespace (tree decl)
5964 /* These checks only apply to member functions and static data
5966 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
5967 || TREE_CODE (decl) == VAR_DECL);
5968 /* We check for problems with specializations in pt.c in
5969 check_specialization_namespace, where we can issue better
5971 if (processing_specialization)
5973 /* There are no restrictions on the placement of
5974 explicit instantiations. */
5975 if (processing_explicit_instantiation)
5979 A member function definition that appears outside of the
5980 class definition shall appear in a namespace scope enclosing
5981 the class definition.
5985 The definition for a static data member shall appear in a
5986 namespace scope enclosing the member's class definition. */
5987 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
5988 pedwarn ("definition of %qD is not in namespace enclosing %qT",
5989 decl, DECL_CONTEXT (decl));
5992 /* Build a PARM_DECL for the "this" parameter. TYPE is the
5993 METHOD_TYPE for a non-static member function; QUALS are the
5994 cv-qualifiers that apply to the function. */
5997 build_this_parm (tree type, cp_cv_quals quals)
6002 cp_cv_quals this_quals;
6004 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6005 /* The `this' parameter is implicitly `const'; it cannot be
6007 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6008 qual_type = cp_build_qualified_type (this_type, this_quals);
6009 parm = build_artificial_parm (this_identifier, qual_type);
6010 cp_apply_type_quals_to_decl (this_quals, parm);
6014 /* CTYPE is class type, or null if non-class.
6015 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6017 DECLARATOR is the function's name.
6018 PARMS is a chain of PARM_DECLs for the function.
6019 VIRTUALP is truthvalue of whether the function is virtual or not.
6020 FLAGS are to be passed through to `grokclassfn'.
6021 QUALS are qualifiers indicating whether the function is `const'
6023 RAISES is a list of exceptions that this function can raise.
6024 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6025 not look, and -1 if we should not call `grokclassfn' at all.
6027 SFK is the kind of special function (if any) for the new function.
6029 Returns `NULL_TREE' if something goes wrong, after issuing
6030 applicable error messages. */
6033 grokfndecl (tree ctype,
6037 tree orig_declarator,
6039 enum overload_flags flags,
6046 special_function_kind sfk,
6053 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6057 type = build_exception_variant (type, raises);
6059 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6060 if (TREE_CODE (type) == METHOD_TYPE)
6063 parm = build_this_parm (type, quals);
6064 TREE_CHAIN (parm) = parms;
6067 DECL_ARGUMENTS (decl) = parms;
6068 /* Propagate volatile out from type to decl. */
6069 if (TYPE_VOLATILE (type))
6070 TREE_THIS_VOLATILE (decl) = 1;
6072 /* If pointers to member functions use the least significant bit to
6073 indicate whether a function is virtual, ensure a pointer
6074 to this function will have that bit clear. */
6075 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6076 && TREE_CODE (type) == METHOD_TYPE
6077 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6078 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6081 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6085 ("defining explicit specialization %qD in friend declaration",
6089 tree fns = TREE_OPERAND (orig_declarator, 0);
6090 tree args = TREE_OPERAND (orig_declarator, 1);
6092 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6094 /* Something like `template <class T> friend void f<T>()'. */
6095 error ("invalid use of template-id %qD in declaration "
6096 "of primary template",
6102 /* A friend declaration of the form friend void f<>(). Record
6103 the information in the TEMPLATE_ID_EXPR. */
6104 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6106 if (TREE_CODE (fns) == COMPONENT_REF)
6108 /* Due to bison parser ickiness, we will have already looked
6109 up an operator_name or PFUNCNAME within the current class
6110 (see template_id in parse.y). If the current class contains
6111 such a name, we'll get a COMPONENT_REF here. Undo that. */
6113 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6114 == current_class_type);
6115 fns = TREE_OPERAND (fns, 1);
6117 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6118 || TREE_CODE (fns) == OVERLOAD);
6119 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6121 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6122 if (TREE_PURPOSE (t)
6123 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6125 error ("default arguments are not allowed in declaration "
6126 "of friend template specialization %qD",
6133 error ("%<inline%> is not allowed in declaration of friend "
6134 "template specialization %qD",
6141 /* If this decl has namespace scope, set that up. */
6143 set_decl_namespace (decl, in_namespace, friendp);
6145 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6147 /* `main' and builtins have implicit 'C' linkage. */
6148 if ((MAIN_NAME_P (declarator)
6149 || (IDENTIFIER_LENGTH (declarator) > 10
6150 && IDENTIFIER_POINTER (declarator)[0] == '_'
6151 && IDENTIFIER_POINTER (declarator)[1] == '_'
6152 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6153 && current_lang_name == lang_name_cplusplus
6154 && ctype == NULL_TREE
6155 /* NULL_TREE means global namespace. */
6156 && DECL_CONTEXT (decl) == NULL_TREE)
6157 SET_DECL_LANGUAGE (decl, lang_c);
6159 /* Should probably propagate const out from type to decl I bet (mrs). */
6162 DECL_STATIC_FUNCTION_P (decl) = 1;
6163 DECL_CONTEXT (decl) = ctype;
6168 DECL_CONTEXT (decl) = ctype;
6170 check_class_member_definition_namespace (decl);
6173 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6175 if (processing_template_decl)
6176 error ("cannot declare %<::main%> to be a template");
6178 error ("cannot declare %<::main%> to be inline");
6180 error ("cannot declare %<::main%> to be static");
6185 /* Members of anonymous types and local classes have no linkage; make
6186 them internal. If a typedef is made later, this will be changed. */
6187 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6188 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6193 /* [basic.link]: A name with no linkage (notably, the name of a class
6194 or enumeration declared in a local scope) shall not be used to
6195 declare an entity with linkage.
6197 Only check this for public decls for now. See core 319, 389. */
6198 t = no_linkage_check (TREE_TYPE (decl),
6199 /*relaxed_p=*/false);
6202 if (TYPE_ANONYMOUS_P (t))
6204 if (DECL_EXTERN_C_P (decl))
6205 /* Allow this; it's pretty common in C. */;
6208 pedwarn ("non-local function %q#D uses anonymous type",
6210 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6211 pedwarn ("%q+#D does not refer to the unqualified "
6212 "type, so it is not used for linkage",
6217 pedwarn ("non-local function %q#D uses local type %qT", decl, t);
6221 TREE_PUBLIC (decl) = publicp;
6224 DECL_INTERFACE_KNOWN (decl) = 1;
6225 DECL_NOT_REALLY_EXTERN (decl) = 1;
6228 /* If the declaration was declared inline, mark it as such. */
6230 DECL_DECLARED_INLINE_P (decl) = 1;
6231 /* We inline functions that are explicitly declared inline, or, when
6232 the user explicitly asks us to, all functions. */
6233 if (DECL_DECLARED_INLINE_P (decl)
6234 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
6235 DECL_INLINE (decl) = 1;
6237 DECL_EXTERNAL (decl) = 1;
6238 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6240 error ("%smember function %qD cannot have cv-qualifier",
6241 (ctype ? "static " : "non-"), decl);
6242 quals = TYPE_UNQUALIFIED;
6245 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6246 && !grok_op_properties (decl, /*complain=*/true))
6249 if (ctype && decl_function_context (decl))
6250 DECL_NO_STATIC_CHAIN (decl) = 1;
6253 /* Make the init_value nonzero so pushdecl knows this is not
6254 tentative. error_mark_node is replaced later with the BLOCK. */
6255 DECL_INITIAL (decl) = error_mark_node;
6257 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6258 TREE_NOTHROW (decl) = 1;
6260 /* Caller will do the rest of this. */
6264 if (ctype != NULL_TREE)
6266 if (sfk == sfk_constructor)
6267 DECL_CONSTRUCTOR_P (decl) = 1;
6269 grokclassfn (ctype, decl, flags);
6272 decl = check_explicit_specialization (orig_declarator, decl,
6275 4 * (friendp != 0));
6276 if (decl == error_mark_node)
6281 cplus_decl_attributes (&decl, *attrlist, 0);
6282 *attrlist = NULL_TREE;
6285 /* Check main's type after attributes have been applied. */
6286 if (ctype == NULL_TREE && DECL_MAIN_P (decl)
6287 && !same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6290 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6292 error ("%<::main%> must return %<int%>");
6293 newtype = build_function_type (integer_type_node, oldtypeargs);
6294 TREE_TYPE (decl) = newtype;
6297 if (ctype != NULL_TREE
6298 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6303 old_decl = check_classfn (ctype, decl,
6304 (processing_template_decl
6305 > template_class_depth (ctype))
6306 ? current_template_parms
6313 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6314 /* Because grokfndecl is always supposed to return a
6315 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6316 here. We depend on our callers to figure out that its
6317 really a template that's being returned. */
6318 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6320 if (DECL_STATIC_FUNCTION_P (old_decl)
6321 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6322 /* Remove the `this' parm added by grokclassfn.
6323 XXX Isn't this done in start_function, too? */
6324 revert_static_member_fn (decl);
6325 if (DECL_ARTIFICIAL (old_decl))
6326 error ("definition of implicitly-declared %qD", old_decl);
6328 /* Since we've smashed OLD_DECL to its
6329 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6330 if (TREE_CODE (decl) == TEMPLATE_DECL)
6331 decl = DECL_TEMPLATE_RESULT (decl);
6333 /* Attempt to merge the declarations. This can fail, in
6334 the case of some invalid specialization declarations. */
6335 pushed_scope = push_scope (ctype);
6336 ok = duplicate_decls (decl, old_decl, friendp);
6338 pop_scope (pushed_scope);
6341 error ("no %q#D member function declared in class %qT",
6349 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6352 if (ctype == NULL_TREE || check)
6356 DECL_VIRTUAL_P (decl) = 1;
6361 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6362 the linkage that DECL will receive in the object file. */
6365 set_linkage_for_static_data_member (tree decl)
6367 /* A static data member always has static storage duration and
6368 external linkage. Note that static data members are forbidden in
6369 local classes -- the only situation in which a class has
6370 non-external linkage. */
6371 TREE_PUBLIC (decl) = 1;
6372 TREE_STATIC (decl) = 1;
6373 /* For non-template classes, static data members are always put
6374 out in exactly those files where they are defined, just as
6375 with ordinary namespace-scope variables. */
6376 if (!processing_template_decl)
6377 DECL_INTERFACE_KNOWN (decl) = 1;
6380 /* Create a VAR_DECL named NAME with the indicated TYPE.
6382 If SCOPE is non-NULL, it is the class type or namespace containing
6383 the variable. If SCOPE is NULL, the variable should is created in
6384 the innermost enclosings scope. */
6387 grokvardecl (tree type,
6389 const cp_decl_specifier_seq *declspecs,
6395 tree explicit_scope;
6397 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6399 /* Compute the scope in which to place the variable, but remember
6400 whether or not that scope was explicitly specified by the user. */
6401 explicit_scope = scope;
6404 /* An explicit "extern" specifier indicates a namespace-scope
6406 if (declspecs->storage_class == sc_extern)
6407 scope = current_namespace;
6408 else if (!at_function_scope_p ())
6409 scope = current_scope ();
6413 && (/* If the variable is a namespace-scope variable declared in a
6414 template, we need DECL_LANG_SPECIFIC. */
6415 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6416 /* Similarly for namespace-scope variables with language linkage
6418 || (TREE_CODE (scope) == NAMESPACE_DECL
6419 && current_lang_name != lang_name_cplusplus)
6420 /* Similarly for static data members. */
6422 decl = build_lang_decl (VAR_DECL, name, type);
6424 decl = build_decl (VAR_DECL, name, type);
6426 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6427 set_decl_namespace (decl, explicit_scope, 0);
6429 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6431 if (declspecs->storage_class == sc_extern)
6433 DECL_THIS_EXTERN (decl) = 1;
6434 DECL_EXTERNAL (decl) = !initialized;
6437 if (DECL_CLASS_SCOPE_P (decl))
6439 set_linkage_for_static_data_member (decl);
6440 /* This function is only called with out-of-class definitions. */
6441 DECL_EXTERNAL (decl) = 0;
6442 check_class_member_definition_namespace (decl);
6444 /* At top level, either `static' or no s.c. makes a definition
6445 (perhaps tentative), and absence of `static' makes it public. */
6446 else if (toplevel_bindings_p ())
6448 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
6449 && (DECL_THIS_EXTERN (decl) || ! constp));
6450 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
6452 /* Not at top level, only `static' makes a static definition. */
6455 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
6456 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
6459 if (declspecs->specs[(int)ds_thread])
6461 if (targetm.have_tls)
6462 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
6464 /* A mere warning is sure to result in improper semantics
6465 at runtime. Don't bother to allow this to compile. */
6466 error ("thread-local storage not supported for this target");
6469 if (TREE_PUBLIC (decl))
6471 /* [basic.link]: A name with no linkage (notably, the name of a class
6472 or enumeration declared in a local scope) shall not be used to
6473 declare an entity with linkage.
6475 Only check this for public decls for now. */
6476 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
6479 if (TYPE_ANONYMOUS_P (t))
6481 if (DECL_EXTERN_C_P (decl))
6482 /* Allow this; it's pretty common in C. */
6486 /* DRs 132, 319 and 389 seem to indicate types with
6487 no linkage can only be used to declare extern "C"
6488 entities. Since it's not always an error in the
6489 ISO C++ 90 Standard, we only issue a warning. */
6490 warning (0, "non-local variable %q#D uses anonymous type",
6492 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6493 warning (0, "%q+#D does not refer to the unqualified "
6494 "type, so it is not used for linkage",
6499 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
6503 DECL_INTERFACE_KNOWN (decl) = 1;
6508 /* Create and return a canonical pointer to member function type, for
6509 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
6512 build_ptrmemfunc_type (tree type)
6516 tree unqualified_variant = NULL_TREE;
6518 if (type == error_mark_node)
6521 /* If a canonical type already exists for this type, use it. We use
6522 this method instead of type_hash_canon, because it only does a
6523 simple equality check on the list of field members. */
6525 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
6528 /* Make sure that we always have the unqualified pointer-to-member
6530 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6532 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
6534 t = make_aggr_type (RECORD_TYPE);
6535 xref_basetypes (t, NULL_TREE);
6537 /* Let the front-end know this is a pointer to member function... */
6538 TYPE_PTRMEMFUNC_FLAG (t) = 1;
6539 /* ... and not really an aggregate. */
6540 SET_IS_AGGR_TYPE (t, 0);
6542 field = build_decl (FIELD_DECL, pfn_identifier, type);
6545 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
6546 TREE_CHAIN (field) = fields;
6549 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
6551 /* Zap out the name so that the back-end will give us the debugging
6552 information for this anonymous RECORD_TYPE. */
6553 TYPE_NAME (t) = NULL_TREE;
6555 /* If this is not the unqualified form of this pointer-to-member
6556 type, set the TYPE_MAIN_VARIANT for this type to be the
6557 unqualified type. Since they are actually RECORD_TYPEs that are
6558 not variants of each other, we must do this manually. */
6559 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
6561 t = build_qualified_type (t, cp_type_quals (type));
6562 TYPE_MAIN_VARIANT (t) = unqualified_variant;
6563 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
6564 TYPE_NEXT_VARIANT (unqualified_variant) = t;
6567 /* Cache this pointer-to-member type so that we can find it again
6569 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
6574 /* Create and return a pointer to data member type. */
6577 build_ptrmem_type (tree class_type, tree member_type)
6579 if (TREE_CODE (member_type) == METHOD_TYPE)
6583 arg_types = TYPE_ARG_TYPES (member_type);
6584 class_type = (cp_build_qualified_type
6586 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
6588 = build_method_type_directly (class_type,
6589 TREE_TYPE (member_type),
6590 TREE_CHAIN (arg_types));
6591 return build_ptrmemfunc_type (build_pointer_type (member_type));
6595 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
6596 return build_offset_type (class_type, member_type);
6600 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
6601 Check to see that the definition is valid. Issue appropriate error
6602 messages. Return 1 if the definition is particularly bad, or 0
6606 check_static_variable_definition (tree decl, tree type)
6608 /* Motion 10 at San Diego: If a static const integral data member is
6609 initialized with an integral constant expression, the initializer
6610 may appear either in the declaration (within the class), or in
6611 the definition, but not both. If it appears in the class, the
6612 member is a member constant. The file-scope definition is always
6614 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
6616 error ("invalid in-class initialization of static data member "
6617 "of non-integral type %qT",
6619 /* If we just return the declaration, crashes will sometimes
6620 occur. We therefore return void_type_node, as if this were a
6621 friend declaration, to cause callers to completely ignore
6622 this declaration. */
6625 else if (!CP_TYPE_CONST_P (type))
6626 error ("ISO C++ forbids in-class initialization of non-const "
6627 "static member %qD",
6629 else if (pedantic && !INTEGRAL_TYPE_P (type))
6630 pedwarn ("ISO C++ forbids initialization of member constant "
6631 "%qD of non-integral type %qT", decl, type);
6636 /* Given the SIZE (i.e., number of elements) in an array, compute an
6637 appropriate index type for the array. If non-NULL, NAME is the
6638 name of the thing being declared. */
6641 compute_array_index_type (tree name, tree size)
6646 if (error_operand_p (size))
6647 return error_mark_node;
6649 type = TREE_TYPE (size);
6650 /* The array bound must be an integer type. */
6651 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
6654 error ("size of array %qD has non-integral type %qT", name, type);
6656 error ("size of array has non-integral type %qT", type);
6657 size = integer_one_node;
6658 type = TREE_TYPE (size);
6661 if (abi_version_at_least (2)
6662 /* We should only handle value dependent expressions specially. */
6663 ? value_dependent_expression_p (size)
6664 /* But for abi-1, we handled all instances in templates. This
6665 effects the manglings produced. */
6666 : processing_template_decl)
6667 return build_index_type (build_min (MINUS_EXPR, sizetype,
6668 size, integer_one_node));
6670 /* The size might be the result of a cast. */
6671 STRIP_TYPE_NOPS (size);
6673 /* It might be a const variable or enumeration constant. */
6674 size = integral_constant_value (size);
6676 /* Normally, the array-bound will be a constant. */
6677 if (TREE_CODE (size) == INTEGER_CST)
6679 /* Check to see if the array bound overflowed. Make that an
6680 error, no matter how generous we're being. */
6681 int old_flag_pedantic_errors = flag_pedantic_errors;
6682 int old_pedantic = pedantic;
6683 pedantic = flag_pedantic_errors = 1;
6684 constant_expression_warning (size);
6685 pedantic = old_pedantic;
6686 flag_pedantic_errors = old_flag_pedantic_errors;
6688 /* An array must have a positive number of elements. */
6689 if (INT_CST_LT (size, integer_zero_node))
6692 error ("size of array %qD is negative", name);
6694 error ("size of array is negative");
6695 size = integer_one_node;
6697 /* As an extension we allow zero-sized arrays. We always allow
6698 them in system headers because glibc uses them. */
6699 else if (integer_zerop (size) && pedantic && !in_system_header)
6702 pedwarn ("ISO C++ forbids zero-size array %qD", name);
6704 pedwarn ("ISO C++ forbids zero-size array");
6707 else if (TREE_CONSTANT (size))
6709 /* `(int) &fn' is not a valid array bound. */
6711 error ("size of array %qD is not an integral constant-expression",
6714 error ("size of array is not an integral constant-expression");
6715 size = integer_one_node;
6717 else if (pedantic && warn_vla != 0)
6720 pedwarn ("ISO C++ forbids variable length array %qD", name);
6722 pedwarn ("ISO C++ forbids variable length array");
6724 else if (warn_vla > 0)
6728 "variable length array %qD is used", name);
6731 "variable length array is used");
6734 if (processing_template_decl && !TREE_CONSTANT (size))
6735 /* A variable sized array. */
6736 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6739 HOST_WIDE_INT saved_processing_template_decl;
6741 /* Compute the index of the largest element in the array. It is
6742 one less than the number of elements in the array. We save
6743 and restore PROCESSING_TEMPLATE_DECL so that computations in
6744 cp_build_binary_op will be appropriately folded. */
6745 saved_processing_template_decl = processing_template_decl;
6746 processing_template_decl = 0;
6747 itype = cp_build_binary_op (MINUS_EXPR,
6748 cp_convert (ssizetype, size),
6749 cp_convert (ssizetype, integer_one_node));
6750 itype = fold (itype);
6751 processing_template_decl = saved_processing_template_decl;
6753 if (!TREE_CONSTANT (itype))
6754 /* A variable sized array. */
6755 itype = variable_size (itype);
6756 /* Make sure that there was no overflow when creating to a signed
6757 index type. (For example, on a 32-bit machine, an array with
6758 size 2^32 - 1 is too big.) */
6759 else if (TREE_CODE (itype) == INTEGER_CST
6760 && TREE_OVERFLOW (itype))
6762 error ("overflow in array dimension");
6763 TREE_OVERFLOW (itype) = 0;
6767 /* Create and return the appropriate index type. */
6768 return build_index_type (itype);
6771 /* Returns the scope (if any) in which the entity declared by
6772 DECLARATOR will be located. If the entity was declared with an
6773 unqualified name, NULL_TREE is returned. */
6776 get_scope_of_declarator (const cp_declarator *declarator)
6778 while (declarator && declarator->kind != cdk_id)
6779 declarator = declarator->declarator;
6781 /* If the declarator-id is a SCOPE_REF, the scope in which the
6782 declaration occurs is the first operand. */
6784 && declarator->u.id.qualifying_scope)
6785 return declarator->u.id.qualifying_scope;
6787 /* Otherwise, the declarator is not a qualified name; the entity will
6788 be declared in the current scope. */
6792 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6793 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6797 create_array_type_for_decl (tree name, tree type, tree size)
6799 tree itype = NULL_TREE;
6800 const char* error_msg;
6802 /* If things have already gone awry, bail now. */
6803 if (type == error_mark_node || size == error_mark_node)
6804 return error_mark_node;
6806 /* Assume that everything will go OK. */
6809 /* There are some types which cannot be array elements. */
6810 switch (TREE_CODE (type))
6813 error_msg = "array of void";
6817 error_msg = "array of functions";
6820 case REFERENCE_TYPE:
6821 error_msg = "array of references";
6825 error_msg = "array of function members";
6832 /* If something went wrong, issue an error-message and return. */
6836 error ("declaration of %qD as %s", name, error_msg);
6838 error ("creating %s", error_msg);
6840 return error_mark_node;
6845 The constant expressions that specify the bounds of the arrays
6846 can be omitted only for the first member of the sequence. */
6847 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6850 error ("declaration of %qD as multidimensional array must "
6851 "have bounds for all dimensions except the first",
6854 error ("multidimensional array must have bounds for all "
6855 "dimensions except the first");
6857 return error_mark_node;
6860 /* Figure out the index type for the array. */
6862 itype = compute_array_index_type (name, size);
6865 T is called the array element type; this type shall not be [...] an
6866 abstract class type. */
6867 abstract_virtuals_error (name, type);
6869 return build_cplus_array_type (type, itype);
6872 /* Check that it's OK to declare a function with the indicated TYPE.
6873 SFK indicates the kind of special function (if any) that this
6874 function is. OPTYPE is the type given in a conversion operator
6875 declaration, or the class type for a constructor/destructor.
6876 Returns the actual return type of the function; that
6877 may be different than TYPE if an error occurs, or for certain
6878 special functions. */
6881 check_special_function_return_type (special_function_kind sfk,
6887 case sfk_constructor:
6889 error ("return type specification for constructor invalid");
6891 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6892 type = build_pointer_type (optype);
6894 type = void_type_node;
6897 case sfk_destructor:
6899 error ("return type specification for destructor invalid");
6900 /* We can't use the proper return type here because we run into
6901 problems with ambiguous bases and covariant returns.
6902 Java classes are left unchanged because (void *) isn't a valid
6903 Java type, and we don't want to change the Java ABI. */
6904 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
6905 type = build_pointer_type (void_type_node);
6907 type = void_type_node;
6910 case sfk_conversion:
6911 if (type && !same_type_p (type, optype))
6912 error ("operator %qT declared to return %qT", optype, type);
6914 pedwarn ("return type specified for %<operator %T%>", optype);
6925 /* A variable or data member (whose unqualified name is IDENTIFIER)
6926 has been declared with the indicated TYPE. If the TYPE is not
6927 acceptable, issue an error message and return a type to use for
6928 error-recovery purposes. */
6931 check_var_type (tree identifier, tree type)
6933 if (VOID_TYPE_P (type))
6936 error ("unnamed variable or field declared void");
6937 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
6939 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
6940 error ("variable or field %qE declared void", identifier);
6943 error ("variable or field declared void");
6944 type = error_mark_node;
6950 /* Given declspecs and a declarator (abstract or otherwise), determine
6951 the name and type of the object declared and construct a DECL node
6954 DECLSPECS is a chain of tree_list nodes whose value fields
6955 are the storage classes and type specifiers.
6957 DECL_CONTEXT says which syntactic context this declaration is in:
6958 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6959 FUNCDEF for a function definition. Like NORMAL but a few different
6960 error messages in each case. Return value may be zero meaning
6961 this definition is too screwy to try to parse.
6962 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6963 handle member functions (which have FIELD context).
6964 Return value may be zero meaning this definition is too screwy to
6966 PARM for a parameter declaration (either within a function prototype
6967 or before a function body). Make a PARM_DECL, or return void_type_node.
6968 CATCHPARM for a parameter declaration before a catch clause.
6969 TYPENAME if for a typename (in a cast or sizeof).
6970 Don't make a DECL node; just return the ..._TYPE node.
6971 FIELD for a struct or union field; make a FIELD_DECL.
6972 BITFIELD for a field with specified width.
6973 INITIALIZED is 1 if the decl has an initializer.
6975 ATTRLIST is a pointer to the list of attributes, which may be NULL
6976 if there are none; *ATTRLIST may be modified if attributes from inside
6977 the declarator should be applied to the declaration.
6979 When this function is called, scoping variables (such as
6980 CURRENT_CLASS_TYPE) should reflect the scope in which the
6981 declaration occurs, not the scope in which the new declaration will
6982 be placed. For example, on:
6986 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6989 Returns a DECL (if a declarator is present), a TYPE (if there is no
6990 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
6994 grokdeclarator (const cp_declarator *declarator,
6995 const cp_decl_specifier_seq *declspecs,
6996 enum decl_context decl_context,
7000 tree type = NULL_TREE;
7002 int virtualp, explicitp, friendp, inlinep, staticp;
7003 int explicit_int = 0;
7004 int explicit_char = 0;
7005 int defaulted_int = 0;
7006 tree dependent_name = NULL_TREE;
7008 tree typedef_decl = NULL_TREE;
7009 const char *name = NULL;
7010 tree typedef_type = NULL_TREE;
7011 /* True if this declarator is a function definition. */
7012 bool funcdef_flag = false;
7013 cp_declarator_kind innermost_code = cdk_error;
7016 /* See the code below that used this. */
7017 tree decl_attr = NULL_TREE;
7020 /* Keep track of what sort of function is being processed
7021 so that we can warn about default return values, or explicit
7022 return values which do not match prescribed defaults. */
7023 special_function_kind sfk = sfk_none;
7025 tree dname = NULL_TREE;
7026 tree ctor_return_type = NULL_TREE;
7027 enum overload_flags flags = NO_SPECIAL;
7028 /* cv-qualifiers that apply to the declarator, for a declaration of
7029 a member function. */
7030 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7031 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7033 tree raises = NULL_TREE;
7034 int template_count = 0;
7035 tree returned_attrs = NULL_TREE;
7036 tree parms = NULL_TREE;
7037 const cp_declarator *id_declarator;
7038 /* The unqualified name of the declarator; either an
7039 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7040 tree unqualified_id;
7041 /* The class type, if any, in which this entity is located,
7042 or NULL_TREE if none. Note that this value may be different from
7043 the current class type; for example if an attempt is made to declare
7044 "A::f" inside "B", this value will be "A". */
7045 tree ctype = current_class_type;
7046 /* The NAMESPACE_DECL for the namespace in which this entity is
7047 located. If an unqualified name is used to declare the entity,
7048 this value will be NULL_TREE, even if the entity is located at
7050 tree in_namespace = NULL_TREE;
7051 cp_storage_class storage_class;
7052 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7053 bool type_was_error_mark_node = false;
7055 signed_p = declspecs->specs[(int)ds_signed];
7056 unsigned_p = declspecs->specs[(int)ds_unsigned];
7057 short_p = declspecs->specs[(int)ds_short];
7058 long_p = declspecs->specs[(int)ds_long];
7059 longlong = declspecs->specs[(int)ds_long] >= 2;
7060 thread_p = declspecs->specs[(int)ds_thread];
7062 if (decl_context == FUNCDEF)
7063 funcdef_flag = true, decl_context = NORMAL;
7064 else if (decl_context == MEMFUNCDEF)
7065 funcdef_flag = true, decl_context = FIELD;
7066 else if (decl_context == BITFIELD)
7067 bitfield = 1, decl_context = FIELD;
7069 /* Look inside a declarator for the name being declared
7070 and get it as a string, for an error message. */
7071 for (id_declarator = declarator;
7073 id_declarator = id_declarator->declarator)
7075 if (id_declarator->kind != cdk_id)
7076 innermost_code = id_declarator->kind;
7078 switch (id_declarator->kind)
7081 if (id_declarator->declarator
7082 && id_declarator->declarator->kind == cdk_id)
7084 sfk = id_declarator->declarator->u.id.sfk;
7085 if (sfk == sfk_destructor)
7092 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7093 tree decl = id_declarator->u.id.unqualified_name;
7096 if (qualifying_scope)
7098 if (at_function_scope_p ())
7102 A declarator-id shall not be qualified except
7105 None of the cases are permitted in block
7107 if (qualifying_scope == global_namespace)
7108 error ("invalid use of qualified-name %<::%D%>",
7110 else if (TYPE_P (qualifying_scope))
7111 error ("invalid use of qualified-name %<%T::%D%>",
7112 qualifying_scope, decl);
7114 error ("invalid use of qualified-name %<%D::%D%>",
7115 qualifying_scope, decl);
7116 return error_mark_node;
7118 else if (TYPE_P (qualifying_scope))
7120 ctype = qualifying_scope;
7121 if (innermost_code != cdk_function
7122 && current_class_type
7123 && !UNIQUELY_DERIVED_FROM_P (ctype,
7124 current_class_type))
7126 error ("type %qT is not derived from type %qT",
7127 ctype, current_class_type);
7128 return error_mark_node;
7131 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7132 in_namespace = qualifying_scope;
7134 switch (TREE_CODE (decl))
7140 if (innermost_code != cdk_function)
7142 error ("declaration of %qD as non-function", decl);
7143 return error_mark_node;
7145 else if (!qualifying_scope
7146 && !(current_class_type && at_class_scope_p ()))
7148 error ("declaration of %qD as non-member", decl);
7149 return error_mark_node;
7152 type = TREE_OPERAND (decl, 0);
7153 name = IDENTIFIER_POINTER (constructor_name (type));
7158 case TEMPLATE_ID_EXPR:
7160 tree fns = TREE_OPERAND (decl, 0);
7163 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7165 gcc_assert (is_overloaded_fn (dname));
7166 dname = DECL_NAME (get_first_fn (dname));
7171 case IDENTIFIER_NODE:
7172 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7175 if (C_IS_RESERVED_WORD (dname))
7177 error ("declarator-id missing; using reserved word %qD",
7179 name = IDENTIFIER_POINTER (dname);
7181 else if (!IDENTIFIER_TYPENAME_P (dname))
7182 name = IDENTIFIER_POINTER (dname);
7185 gcc_assert (flags == NO_SPECIAL);
7186 flags = TYPENAME_FLAG;
7187 ctor_return_type = TREE_TYPE (dname);
7188 sfk = sfk_conversion;
7189 if (is_typename_at_global_scope (dname))
7190 name = IDENTIFIER_POINTER (dname);
7192 name = "<invalid operator>";
7208 return error_mark_node;
7214 if (id_declarator->kind == cdk_id)
7220 The declarator in a function-definition shall have the form
7221 D1 ( parameter-declaration-clause) ... */
7222 if (funcdef_flag && innermost_code != cdk_function)
7224 error ("function definition does not declare parameters");
7225 return error_mark_node;
7228 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7229 && innermost_code != cdk_function
7230 && ! (ctype && !declspecs->any_specifiers_p))
7232 error ("declaration of %qD as non-function", dname);
7233 return error_mark_node;
7236 /* Anything declared one level down from the top level
7237 must be one of the parameters of a function
7238 (because the body is at least two levels down). */
7240 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7241 by not allowing C++ class definitions to specify their parameters
7242 with xdecls (must be spec.d in the parmlist).
7244 Since we now wait to push a class scope until we are sure that
7245 we are in a legitimate method context, we must set oldcname
7246 explicitly (since current_class_name is not yet alive).
7248 We also want to avoid calling this a PARM if it is in a namespace. */
7250 if (decl_context == NORMAL && !toplevel_bindings_p ())
7252 struct cp_binding_level *b = current_binding_level;
7253 current_binding_level = b->level_chain;
7254 if (current_binding_level != 0 && toplevel_bindings_p ())
7255 decl_context = PARM;
7256 current_binding_level = b;
7260 name = decl_context == PARM ? "parameter" : "type name";
7262 /* If there were multiple types specified in the decl-specifier-seq,
7263 issue an error message. */
7264 if (declspecs->multiple_types_p)
7266 error ("two or more data types in declaration of %qs", name);
7267 return error_mark_node;
7270 /* Extract the basic type from the decl-specifier-seq. */
7271 type = declspecs->type;
7272 if (type == error_mark_node)
7275 type_was_error_mark_node = true;
7277 /* If the entire declaration is itself tagged as deprecated then
7278 suppress reports of deprecated items. */
7279 if (type && TREE_DEPRECATED (type)
7280 && deprecated_state != DEPRECATED_SUPPRESS)
7281 warn_deprecated_use (type);
7282 if (type && TREE_CODE (type) == TYPE_DECL)
7284 typedef_decl = type;
7285 type = TREE_TYPE (typedef_decl);
7287 /* No type at all: default to `int', and set DEFAULTED_INT
7288 because it was not a user-defined typedef. */
7289 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7291 /* These imply 'int'. */
7292 type = integer_type_node;
7296 explicit_int = declspecs->explicit_int_p;
7297 explicit_char = declspecs->explicit_char_p;
7300 /* See the code below that used this. */
7302 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7304 typedef_type = type;
7307 if (sfk != sfk_conversion)
7308 ctor_return_type = ctype;
7310 if (sfk != sfk_none)
7311 type = check_special_function_return_type (sfk, type,
7313 else if (type == NULL_TREE)
7319 /* We handle `main' specially here, because 'main () { }' is so
7320 common. With no options, it is allowed. With -Wreturn-type,
7321 it is a warning. It is only an error with -pedantic-errors. */
7322 is_main = (funcdef_flag
7323 && dname && MAIN_NAME_P (dname)
7324 && ctype == NULL_TREE
7325 && in_namespace == NULL_TREE
7326 && current_namespace == global_namespace);
7328 if (type_was_error_mark_node)
7329 /* We've already issued an error, don't complain more. */;
7330 else if (in_system_header || flag_ms_extensions)
7331 /* Allow it, sigh. */;
7332 else if (pedantic || ! is_main)
7333 pedwarn ("ISO C++ forbids declaration of %qs with no type", name);
7334 else if (warn_return_type)
7335 warning (0, "ISO C++ forbids declaration of %qs with no type", name);
7337 type = integer_type_node;
7342 /* Now process the modifiers that were specified
7343 and check for invalid combinations. */
7345 /* Long double is a special combination. */
7346 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7349 type = build_qualified_type (long_double_type_node,
7350 cp_type_quals (type));
7353 /* Check all other uses of type modifiers. */
7355 if (unsigned_p || signed_p || long_p || short_p)
7359 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7360 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7361 else if (signed_p && unsigned_p)
7362 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7363 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7364 error ("%<long long%> invalid for %qs", name);
7365 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7366 error ("%<long%> invalid for %qs", name);
7367 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7368 error ("%<short%> invalid for %qs", name);
7369 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7370 error ("%<long%> or %<short%> invalid for %qs", name);
7371 else if ((long_p || short_p) && explicit_char)
7372 error ("%<long%> or %<short%> specified with char for %qs", name);
7373 else if (long_p && short_p)
7374 error ("%<long%> and %<short%> specified together for %qs", name);
7378 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7380 pedwarn ("long, short, signed or unsigned used invalidly for %qs",
7382 if (flag_pedantic_errors)
7387 /* Discard the type modifiers if they are invalid. */
7398 /* Decide whether an integer type is signed or not.
7399 Optionally treat bitfields as signed by default. */
7403 It is implementation-defined whether a plain (neither
7404 explicitly signed or unsigned) char, short, int, or long
7405 bit-field is signed or unsigned.
7407 Naturally, we extend this to long long as well. Note that
7408 this does not include wchar_t. */
7409 || (bitfield && !flag_signed_bitfields
7411 /* A typedef for plain `int' without `signed' can be
7412 controlled just like plain `int', but a typedef for
7413 `signed int' cannot be so controlled. */
7415 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
7416 && TREE_CODE (type) == INTEGER_TYPE
7417 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
7420 type = long_long_unsigned_type_node;
7422 type = long_unsigned_type_node;
7424 type = short_unsigned_type_node;
7425 else if (type == char_type_node)
7426 type = unsigned_char_type_node;
7427 else if (typedef_decl)
7428 type = c_common_unsigned_type (type);
7430 type = unsigned_type_node;
7432 else if (signed_p && type == char_type_node)
7433 type = signed_char_type_node;
7435 type = long_long_integer_type_node;
7437 type = long_integer_type_node;
7439 type = short_integer_type_node;
7441 if (declspecs->specs[(int)ds_complex])
7443 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
7444 error ("complex invalid for %qs", name);
7445 /* If we just have "complex", it is equivalent to
7446 "complex double", but if any modifiers at all are specified it is
7447 the complex form of TYPE. E.g, "complex short" is
7448 "complex short int". */
7450 else if (defaulted_int && ! longlong
7451 && ! (long_p || short_p || signed_p || unsigned_p))
7452 type = complex_double_type_node;
7453 else if (type == integer_type_node)
7454 type = complex_integer_type_node;
7455 else if (type == float_type_node)
7456 type = complex_float_type_node;
7457 else if (type == double_type_node)
7458 type = complex_double_type_node;
7459 else if (type == long_double_type_node)
7460 type = complex_long_double_type_node;
7462 type = build_complex_type (type);
7465 type_quals = TYPE_UNQUALIFIED;
7466 if (declspecs->specs[(int)ds_const])
7467 type_quals |= TYPE_QUAL_CONST;
7468 if (declspecs->specs[(int)ds_volatile])
7469 type_quals |= TYPE_QUAL_VOLATILE;
7470 if (declspecs->specs[(int)ds_restrict])
7471 type_quals |= TYPE_QUAL_RESTRICT;
7472 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
7473 error ("qualifiers are not allowed on declaration of %<operator %T%>",
7476 if (TREE_CODE (type) == FUNCTION_TYPE
7477 && type_quals != TYPE_UNQUALIFIED)
7479 /* This was an error in C++98 (cv-qualifiers cannot be added to
7480 a function type), but DR 295 makes the code well-formed by
7481 dropping the extra qualifiers. */
7484 tree bad_type = build_qualified_type (type, type_quals);
7485 pedwarn ("ignoring %qV qualifiers added to function type %qT",
7488 type_quals = TYPE_UNQUALIFIED;
7490 type_quals |= cp_type_quals (type);
7491 type = cp_build_qualified_type_real
7492 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
7493 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
7494 /* We might have ignored or rejected some of the qualifiers. */
7495 type_quals = cp_type_quals (type);
7498 inlinep = !! declspecs->specs[(int)ds_inline];
7499 virtualp = !! declspecs->specs[(int)ds_virtual];
7500 explicitp = !! declspecs->specs[(int)ds_explicit];
7502 storage_class = declspecs->storage_class;
7503 if (storage_class == sc_static)
7504 staticp = 1 + (decl_context == FIELD);
7506 if (virtualp && staticp == 2)
7508 error ("member %qD cannot be declared both virtual and static", dname);
7509 storage_class = sc_none;
7512 friendp = !! declspecs->specs[(int)ds_friend];
7514 if (dependent_name && !friendp)
7516 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
7517 return error_mark_node;
7520 /* Issue errors about use of storage classes for parameters. */
7521 if (decl_context == PARM)
7523 if (declspecs->specs[(int)ds_typedef])
7525 error ("typedef declaration invalid in parameter declaration");
7526 return error_mark_node;
7528 else if (storage_class == sc_static
7529 || storage_class == sc_extern
7531 error ("storage class specifiers invalid in parameter declarations");
7534 /* Give error if `virtual' is used outside of class declaration. */
7536 && (current_class_name == NULL_TREE || decl_context != FIELD))
7538 error ("virtual outside class declaration");
7542 /* Static anonymous unions are dealt with here. */
7543 if (staticp && decl_context == TYPENAME
7545 && ANON_AGGR_TYPE_P (declspecs->type))
7546 decl_context = FIELD;
7548 /* Warn about storage classes that are invalid for certain
7549 kinds of declarations (parameters, typenames, etc.). */
7552 && storage_class != sc_extern
7553 && storage_class != sc_static)
7554 || declspecs->specs[(int)ds_typedef]))
7556 error ("multiple storage classes in declaration of %qs", name);
7559 if (declspecs->conflicting_specifiers_p)
7561 error ("conflicting specifiers in declaration of %qs", name);
7562 storage_class = sc_none;
7564 else if (decl_context != NORMAL
7565 && ((storage_class != sc_none
7566 && storage_class != sc_mutable)
7569 if ((decl_context == PARM || decl_context == CATCHPARM)
7570 && (storage_class == sc_register
7571 || storage_class == sc_auto))
7573 else if (declspecs->specs[(int)ds_typedef])
7575 else if (decl_context == FIELD
7576 /* C++ allows static class elements. */
7577 && storage_class == sc_static)
7578 /* C++ also allows inlines and signed and unsigned elements,
7579 but in those cases we don't come in here. */
7583 if (decl_context == FIELD)
7584 error ("storage class specified for %qs", name);
7587 if (decl_context == PARM || decl_context == CATCHPARM)
7588 error ("storage class specified for parameter %qs", name);
7590 error ("storage class specified for typename");
7592 if (storage_class == sc_register
7593 || storage_class == sc_auto
7594 || storage_class == sc_extern
7596 storage_class = sc_none;
7599 else if (storage_class == sc_extern && initialized
7602 if (toplevel_bindings_p ())
7604 /* It's common practice (and completely valid) to have a const
7605 be initialized and declared extern. */
7606 if (!(type_quals & TYPE_QUAL_CONST))
7607 warning (0, "%qs initialized and declared %<extern%>", name);
7610 error ("%qs has both %<extern%> and initializer", name);
7612 else if (storage_class == sc_extern && funcdef_flag
7613 && ! toplevel_bindings_p ())
7614 error ("nested function %qs declared %<extern%>", name);
7615 else if (toplevel_bindings_p ())
7617 if (storage_class == sc_auto)
7618 error ("top-level declaration of %qs specifies %<auto%>", name);
7621 && storage_class != sc_extern
7622 && storage_class != sc_static)
7624 error ("function-scope %qs implicitly auto and declared %<__thread%>",
7629 if (storage_class && friendp)
7630 error ("storage class specifiers invalid in friend function declarations");
7633 unqualified_id = NULL_TREE;
7636 unqualified_id = id_declarator->u.id.unqualified_name;
7637 switch (TREE_CODE (unqualified_id))
7641 = constructor_name (TREE_OPERAND (unqualified_id, 0));
7644 case IDENTIFIER_NODE:
7645 case TEMPLATE_ID_EXPR:
7653 /* Determine the type of the entity declared by recurring on the
7655 for (; declarator; declarator = declarator->declarator)
7657 const cp_declarator *inner_declarator;
7660 if (type == error_mark_node)
7661 return error_mark_node;
7663 attrs = declarator->attributes;
7669 if (declarator == NULL || declarator->kind == cdk_id)
7670 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
7671 if (declarator->kind == cdk_function)
7672 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
7673 if (declarator->kind == cdk_array)
7674 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
7675 returned_attrs = decl_attributes (&type,
7676 chainon (returned_attrs, attrs),
7680 if (declarator->kind == cdk_id)
7683 inner_declarator = declarator->declarator;
7685 switch (declarator->kind)
7688 type = create_array_type_for_decl (dname, type,
7689 declarator->u.array.bounds);
7697 /* Declaring a function type.
7698 Make sure we have a valid type for the function to return. */
7700 /* We now know that the TYPE_QUALS don't apply to the
7701 decl, but to its return type. */
7702 type_quals = TYPE_UNQUALIFIED;
7704 /* Warn about some types functions can't return. */
7706 if (TREE_CODE (type) == FUNCTION_TYPE)
7708 error ("%qs declared as function returning a function", name);
7709 type = integer_type_node;
7711 if (TREE_CODE (type) == ARRAY_TYPE)
7713 error ("%qs declared as function returning an array", name);
7714 type = integer_type_node;
7717 /* Pick up type qualifiers which should be applied to `this'. */
7718 memfn_quals = declarator->u.function.qualifiers;
7720 /* Pick up the exception specifications. */
7721 raises = declarator->u.function.exception_specification;
7723 /* Say it's a definition only for the CALL_EXPR
7724 closest to the identifier. */
7725 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7727 if (ctype == NULL_TREE
7728 && decl_context == FIELD
7730 && (friendp == 0 || dname == current_class_name))
7731 ctype = current_class_type;
7733 if (ctype && (sfk == sfk_constructor
7734 || sfk == sfk_destructor))
7736 /* We are within a class's scope. If our declarator name
7737 is the same as the class name, and we are defining
7738 a function, then it is a constructor/destructor, and
7739 therefore returns a void type. */
7741 /* ISO C++ 12.4/2. A destructor may not be declared
7742 const or volatile. A destructor may not be
7745 ISO C++ 12.1. A constructor may not be declared
7746 const or volatile. A constructor may not be
7747 virtual. A constructor may not be static. */
7749 error ((flags == DTOR_FLAG)
7750 ? "destructor cannot be static member function"
7751 : "constructor cannot be static member function");
7754 error ((flags == DTOR_FLAG)
7755 ? "destructors may not be cv-qualified"
7756 : "constructors may not be cv-qualified");
7757 memfn_quals = TYPE_UNQUALIFIED;
7760 if (decl_context == FIELD
7761 && !member_function_or_else (ctype,
7764 return error_mark_node;
7766 if (flags != DTOR_FLAG)
7768 /* It's a constructor. */
7773 pedwarn ("constructors cannot be declared virtual");
7776 if (decl_context == FIELD
7777 && sfk != sfk_constructor)
7778 return error_mark_node;
7780 if (decl_context == FIELD)
7786 error ("can't initialize friend function %qs", name);
7789 /* Cannot be both friend and virtual. */
7790 error ("virtual functions cannot be friends");
7793 if (decl_context == NORMAL)
7794 error ("friend declaration not in class definition");
7795 if (current_function_decl && funcdef_flag)
7796 error ("can't define friend function %qs in a local "
7801 arg_types = grokparms (declarator->u.function.parameters,
7804 if (inner_declarator
7805 && inner_declarator->kind == cdk_id
7806 && inner_declarator->u.id.sfk == sfk_destructor
7807 && arg_types != void_list_node)
7809 error ("destructors may not have parameters");
7810 arg_types = void_list_node;
7814 type = build_function_type (type, arg_types);
7821 /* Filter out pointers-to-references and references-to-references.
7822 We can get these if a TYPE_DECL is used. */
7824 if (TREE_CODE (type) == REFERENCE_TYPE)
7826 error (declarator->kind == cdk_reference
7827 ? "cannot declare reference to %q#T"
7828 : "cannot declare pointer to %q#T", type);
7829 type = TREE_TYPE (type);
7831 else if (VOID_TYPE_P (type))
7833 if (declarator->kind == cdk_reference)
7834 error ("cannot declare reference to %q#T", type);
7835 else if (declarator->kind == cdk_ptrmem)
7836 error ("cannot declare pointer to %q#T member", type);
7839 /* We now know that the TYPE_QUALS don't apply to the decl,
7840 but to the target of the pointer. */
7841 type_quals = TYPE_UNQUALIFIED;
7843 if (declarator->kind == cdk_ptrmem
7844 && (TREE_CODE (type) == FUNCTION_TYPE || memfn_quals))
7846 memfn_quals |= cp_type_quals (type);
7847 type = build_memfn_type (type,
7848 declarator->u.pointer.class_type,
7850 memfn_quals = TYPE_UNQUALIFIED;
7853 if (declarator->kind == cdk_reference)
7855 if (!VOID_TYPE_P (type))
7856 type = build_reference_type (type);
7858 else if (TREE_CODE (type) == METHOD_TYPE)
7859 type = build_ptrmemfunc_type (build_pointer_type (type));
7860 else if (declarator->kind == cdk_ptrmem)
7862 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
7864 if (declarator->u.pointer.class_type == error_mark_node)
7865 /* We will already have complained. */
7866 type = error_mark_node;
7868 type = build_ptrmem_type (declarator->u.pointer.class_type,
7872 type = build_pointer_type (type);
7874 /* Process a list of type modifier keywords (such as
7875 const or volatile) that were given inside the `*' or `&'. */
7877 if (declarator->u.pointer.qualifiers)
7880 = cp_build_qualified_type (type,
7881 declarator->u.pointer.qualifiers);
7882 type_quals = cp_type_quals (type);
7895 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7896 && TREE_CODE (type) != FUNCTION_TYPE
7897 && TREE_CODE (type) != METHOD_TYPE)
7899 error ("template-id %qD used as a declarator",
7901 unqualified_id = dname;
7904 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
7905 qualified with a class-name, turn it into a METHOD_TYPE, unless
7906 we know that the function is static. We take advantage of this
7907 opportunity to do other processing that pertains to entities
7908 explicitly declared to be class members. Note that if DECLARATOR
7909 is non-NULL, we know it is a cdk_id declarator; otherwise, we
7910 would not have exited the loop above. */
7912 && declarator->u.id.qualifying_scope
7913 && TYPE_P (declarator->u.id.qualifying_scope))
7917 ctype = declarator->u.id.qualifying_scope;
7918 ctype = TYPE_MAIN_VARIANT (ctype);
7920 while (t != NULL_TREE && CLASS_TYPE_P (t))
7922 /* You're supposed to have one `template <...>' for every
7923 template class, but you don't need one for a full
7924 specialization. For example:
7926 template <class T> struct S{};
7927 template <> struct S<int> { void f(); };
7928 void S<int>::f () {}
7930 is correct; there shouldn't be a `template <>' for the
7931 definition of `S<int>::f'. */
7932 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
7933 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
7934 /* T is an explicit (not partial) specialization. All
7935 containing classes must therefore also be explicitly
7938 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
7939 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7940 template_count += 1;
7942 t = TYPE_MAIN_DECL (t);
7943 t = DECL_CONTEXT (t);
7946 if (ctype == current_class_type)
7949 pedwarn ("member functions are implicitly friends of their class");
7951 pedwarn ("extra qualification %<%T::%> on member %qs",
7954 else if (/* If the qualifying type is already complete, then we
7955 can skip the following checks. */
7956 !COMPLETE_TYPE_P (ctype)
7957 && (/* If the function is being defined, then
7958 qualifying type must certainly be complete. */
7960 /* A friend declaration of "T::f" is OK, even if
7961 "T" is a template parameter. But, if this
7962 function is not a friend, the qualifying type
7964 || (!friendp && !CLASS_TYPE_P (ctype))
7965 /* For a declaration, the type need not be
7966 complete, if either it is dependent (since there
7967 is no meaningful definition of complete in that
7968 case) or the qualifying class is currently being
7970 || !(dependent_type_p (ctype)
7971 || currently_open_class (ctype)))
7972 /* Check that the qualifying type is complete. */
7973 && !complete_type_or_else (ctype, NULL_TREE))
7974 return error_mark_node;
7975 else if (TREE_CODE (type) == FUNCTION_TYPE)
7977 tree sname = declarator->u.id.unqualified_name;
7979 if (current_class_type
7980 && (!friendp || funcdef_flag))
7983 ? "cannot define member function %<%T::%s%> within %<%T%>"
7984 : "cannot declare member function %<%T::%s%> within %<%T%>",
7985 ctype, name, current_class_type);
7986 return error_mark_node;
7989 if (TREE_CODE (sname) == IDENTIFIER_NODE
7990 && NEW_DELETE_OPNAME_P (sname))
7991 /* Overloaded operator new and operator delete
7992 are always static functions. */
7995 type = build_memfn_type (type, ctype, memfn_quals);
7997 else if (declspecs->specs[(int)ds_typedef]
7998 && current_class_type)
8000 error ("cannot declare member %<%T::%s%> within %qT",
8001 ctype, name, current_class_type);
8002 return error_mark_node;
8006 /* Now TYPE has the actual type. */
8011 *attrlist = chainon (returned_attrs, *attrlist);
8013 attrlist = &returned_attrs;
8016 /* Did array size calculations overflow? */
8018 if (TREE_CODE (type) == ARRAY_TYPE
8019 && COMPLETE_TYPE_P (type)
8020 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8021 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8023 error ("size of array %qs is too large", name);
8024 /* If we proceed with the array type as it is, we'll eventually
8025 crash in tree_low_cst(). */
8026 type = error_mark_node;
8029 if ((decl_context == FIELD || decl_context == PARM)
8030 && !processing_template_decl
8031 && variably_modified_type_p (type, NULL_TREE))
8033 if (decl_context == FIELD)
8034 error ("data member may not have variably modified type %qT", type);
8036 error ("parameter may not have variably modified type %qT", type);
8037 type = error_mark_node;
8040 if (explicitp == 1 || (explicitp && friendp))
8042 /* [dcl.fct.spec] The explicit specifier shall only be used in
8043 declarations of constructors within a class definition. */
8044 error ("only declarations of constructors can be %<explicit%>");
8048 if (storage_class == sc_mutable)
8050 if (decl_context != FIELD || friendp)
8052 error ("non-member %qs cannot be declared %<mutable%>", name);
8053 storage_class = sc_none;
8055 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8057 error ("non-object member %qs cannot be declared %<mutable%>", name);
8058 storage_class = sc_none;
8060 else if (TREE_CODE (type) == FUNCTION_TYPE
8061 || TREE_CODE (type) == METHOD_TYPE)
8063 error ("function %qs cannot be declared %<mutable%>", name);
8064 storage_class = sc_none;
8068 error ("static %qs cannot be declared %<mutable%>", name);
8069 storage_class = sc_none;
8071 else if (type_quals & TYPE_QUAL_CONST)
8073 error ("const %qs cannot be declared %<mutable%>", name);
8074 storage_class = sc_none;
8078 /* If this is declaring a typedef name, return a TYPE_DECL. */
8079 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8083 /* Note that the grammar rejects storage classes
8084 in typenames, fields or parameters. */
8085 if (current_lang_name == lang_name_java)
8086 TYPE_FOR_JAVA (type) = 1;
8088 /* This declaration:
8090 typedef void f(int) const;
8092 declares a function type which is not a member of any
8093 particular class, but which is cv-qualified; for
8094 example "f S::*" declares a pointer to a const-qualified
8095 member function of S. We record the cv-qualification in the
8097 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8098 type = cp_build_qualified_type (type, memfn_quals);
8100 if (decl_context == FIELD)
8101 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8103 decl = build_decl (TYPE_DECL, unqualified_id, type);
8104 if (id_declarator && declarator->u.id.qualifying_scope)
8105 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8107 if (decl_context != FIELD)
8109 if (!current_function_decl)
8110 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8111 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8112 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8113 (current_function_decl)))
8114 /* The TYPE_DECL is "abstract" because there will be
8115 clones of this constructor/destructor, and there will
8116 be copies of this TYPE_DECL generated in those
8118 DECL_ABSTRACT (decl) = 1;
8120 else if (constructor_name_p (unqualified_id, current_class_type))
8121 pedwarn ("ISO C++ forbids nested type %qD with same name "
8122 "as enclosing class",
8125 /* If the user declares "typedef struct {...} foo" then the
8126 struct will have an anonymous name. Fill that name in now.
8127 Nothing can refer to it, so nothing needs know about the name
8129 if (type != error_mark_node
8132 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8133 && TYPE_ANONYMOUS_P (type)
8134 /* Don't do this if there are attributes. */
8135 && (!attrlist || !*attrlist)
8136 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8138 tree oldname = TYPE_NAME (type);
8141 /* Replace the anonymous name with the real name everywhere. */
8142 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8143 if (TYPE_NAME (t) == oldname)
8144 TYPE_NAME (t) = decl;
8146 if (TYPE_LANG_SPECIFIC (type))
8147 TYPE_WAS_ANONYMOUS (type) = 1;
8149 /* If this is a typedef within a template class, the nested
8150 type is a (non-primary) template. The name for the
8151 template needs updating as well. */
8152 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8153 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8154 = TYPE_IDENTIFIER (type);
8156 /* FIXME remangle member functions; member functions of a
8157 type with external linkage have external linkage. */
8160 /* Any qualifiers on a function type typedef have already been
8162 if (memfn_quals && !ctype && TREE_CODE (type) == FUNCTION_TYPE)
8163 memfn_quals = TYPE_UNQUALIFIED;
8166 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8167 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8169 bad_specifiers (decl, "type", virtualp,
8170 memfn_quals != TYPE_UNQUALIFIED,
8171 inlinep, friendp, raises != NULL_TREE);
8176 /* Detect the case of an array type of unspecified size
8177 which came, as such, direct from a typedef name.
8178 We must copy the type, so that the array's domain can be
8179 individually set by the object's initializer. */
8181 if (type && typedef_type
8182 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8183 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8184 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8186 /* Detect where we're using a typedef of function type to declare a
8187 function. PARMS will not be set, so we must create it now. */
8189 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8191 tree decls = NULL_TREE;
8194 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8196 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8198 TREE_CHAIN (decl) = decls;
8202 parms = nreverse (decls);
8204 if (decl_context != TYPENAME)
8206 /* A cv-qualifier-seq shall only be part of the function type
8207 for a non-static member function. [8.3.5/4 dcl.fct] */
8208 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8209 && (current_class_type == NULL_TREE || staticp) )
8211 error ("qualified function types cannot be used to declare %s functions",
8212 (staticp? "static member" : "free"));
8213 type = TYPE_MAIN_VARIANT (type);
8216 /* The qualifiers on the function type become the qualifiers on
8217 the non-static member function. */
8218 memfn_quals |= cp_type_quals (type);
8222 /* If this is a type name (such as, in a cast or sizeof),
8223 compute the type and return it now. */
8225 if (decl_context == TYPENAME)
8227 /* Note that the grammar rejects storage classes
8228 in typenames, fields or parameters. */
8229 if (type_quals != TYPE_UNQUALIFIED)
8230 type_quals = TYPE_UNQUALIFIED;
8232 /* Special case: "friend class foo" looks like a TYPENAME context. */
8235 if (type_quals != TYPE_UNQUALIFIED)
8237 error ("type qualifiers specified for friend class declaration");
8238 type_quals = TYPE_UNQUALIFIED;
8242 error ("%<inline%> specified for friend class declaration");
8248 /* Don't allow friend declaration without a class-key. */
8249 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8250 pedwarn ("template parameters cannot be friends");
8251 else if (TREE_CODE (type) == TYPENAME_TYPE)
8252 pedwarn ("friend declaration requires class-key, "
8253 "i.e. %<friend class %T::%D%>",
8254 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8256 pedwarn ("friend declaration requires class-key, "
8257 "i.e. %<friend %#T%>",
8261 /* Only try to do this stuff if we didn't already give up. */
8262 if (type != integer_type_node)
8264 /* A friendly class? */
8265 if (current_class_type)
8266 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8269 error ("trying to make class %qT a friend of global scope",
8272 type = void_type_node;
8275 else if (memfn_quals)
8277 if (ctype == NULL_TREE)
8279 if (TREE_CODE (type) != METHOD_TYPE)
8280 error ("invalid qualifiers on non-member function type");
8282 ctype = TYPE_METHOD_BASETYPE (type);
8285 type = build_memfn_type (type, ctype, memfn_quals);
8290 else if (unqualified_id == NULL_TREE && decl_context != PARM
8291 && decl_context != CATCHPARM
8292 && TREE_CODE (type) != UNION_TYPE
8295 error ("abstract declarator %qT used as declaration", type);
8296 return error_mark_node;
8299 /* Only functions may be declared using an operator-function-id. */
8301 && IDENTIFIER_OPNAME_P (unqualified_id)
8302 && TREE_CODE (type) != FUNCTION_TYPE
8303 && TREE_CODE (type) != METHOD_TYPE)
8305 error ("declaration of %qD as non-function", unqualified_id);
8306 return error_mark_node;
8309 /* We don't check parameter types here because we can emit a better
8310 error message later. */
8311 if (decl_context != PARM)
8313 type = check_var_type (unqualified_id, type);
8314 if (type == error_mark_node)
8315 return error_mark_node;
8318 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
8319 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
8321 if (decl_context == PARM || decl_context == CATCHPARM)
8323 if (ctype || in_namespace)
8324 error ("cannot use %<::%> in parameter declaration");
8326 /* A parameter declared as an array of T is really a pointer to T.
8327 One declared as a function is really a pointer to a function.
8328 One declared as a member is really a pointer to member. */
8330 if (TREE_CODE (type) == ARRAY_TYPE)
8332 /* Transfer const-ness of array into that of type pointed to. */
8333 type = build_pointer_type (TREE_TYPE (type));
8334 type_quals = TYPE_UNQUALIFIED;
8336 else if (TREE_CODE (type) == FUNCTION_TYPE)
8337 type = build_pointer_type (type);
8343 if (decl_context == PARM)
8345 decl = cp_build_parm_decl (unqualified_id, type);
8347 bad_specifiers (decl, "parameter", virtualp,
8348 memfn_quals != TYPE_UNQUALIFIED,
8349 inlinep, friendp, raises != NULL_TREE);
8351 else if (decl_context == FIELD)
8353 /* The C99 flexible array extension. */
8354 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
8355 && TYPE_DOMAIN (type) == NULL_TREE)
8357 tree itype = compute_array_index_type (dname, integer_zero_node);
8358 type = build_cplus_array_type (TREE_TYPE (type), itype);
8361 if (type == error_mark_node)
8363 /* Happens when declaring arrays of sizes which
8364 are error_mark_node, for example. */
8367 else if (in_namespace && !friendp)
8369 /* Something like struct S { int N::j; }; */
8370 error ("invalid use of %<::%>");
8371 return error_mark_node;
8373 else if (TREE_CODE (type) == FUNCTION_TYPE)
8376 tree function_context;
8380 if (ctype == NULL_TREE)
8381 ctype = current_class_type;
8383 if (ctype == NULL_TREE)
8385 error ("can't make %qD into a method -- not in a class",
8387 return error_mark_node;
8390 /* ``A union may [ ... ] not [ have ] virtual functions.''
8392 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
8394 error ("function %qD declared virtual inside a union",
8396 return error_mark_node;
8399 if (NEW_DELETE_OPNAME_P (unqualified_id))
8403 error ("%qD cannot be declared virtual, since it "
8409 else if (staticp < 2)
8410 type = build_memfn_type (type, ctype, memfn_quals);
8413 /* Check that the name used for a destructor makes sense. */
8414 if (sfk == sfk_destructor)
8418 gcc_assert (friendp);
8419 error ("expected qualified name in friend declaration "
8420 "for destructor %qD",
8421 id_declarator->u.id.unqualified_name);
8422 return error_mark_node;
8425 if (!same_type_p (TREE_OPERAND
8426 (id_declarator->u.id.unqualified_name, 0),
8429 error ("declaration of %qD as member of %qT",
8430 id_declarator->u.id.unqualified_name, ctype);
8431 return error_mark_node;
8435 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
8436 function_context = (ctype != NULL_TREE) ?
8437 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
8438 publicp = (! friendp || ! staticp)
8439 && function_context == NULL_TREE;
8440 decl = grokfndecl (ctype, type,
8441 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8442 ? unqualified_id : dname,
8445 virtualp, flags, memfn_quals, raises,
8446 friendp ? -1 : 0, friendp, publicp, inlinep,
8448 funcdef_flag, template_count, in_namespace, attrlist);
8449 if (decl == NULL_TREE)
8450 return error_mark_node;
8452 /* This clobbers the attrs stored in `decl' from `attrlist'. */
8453 /* The decl and setting of decl_attr is also turned off. */
8454 decl = build_decl_attribute_variant (decl, decl_attr);
8457 /* [class.conv.ctor]
8459 A constructor declared without the function-specifier
8460 explicit that can be called with a single parameter
8461 specifies a conversion from the type of its first
8462 parameter to the type of its class. Such a constructor
8463 is called a converting constructor. */
8465 DECL_NONCONVERTING_P (decl) = 1;
8466 else if (DECL_CONSTRUCTOR_P (decl))
8468 /* The constructor can be called with exactly one
8469 parameter if there is at least one parameter, and
8470 any subsequent parameters have default arguments.
8471 Ignore any compiler-added parms. */
8472 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
8474 if (arg_types == void_list_node
8476 && TREE_CHAIN (arg_types)
8477 && TREE_CHAIN (arg_types) != void_list_node
8478 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
8479 DECL_NONCONVERTING_P (decl) = 1;
8482 else if (TREE_CODE (type) == METHOD_TYPE)
8484 /* We only get here for friend declarations of
8485 members of other classes. */
8486 /* All method decls are public, so tell grokfndecl to set
8487 TREE_PUBLIC, also. */
8488 decl = grokfndecl (ctype, type,
8489 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
8490 ? unqualified_id : dname,
8493 virtualp, flags, memfn_quals, raises,
8494 friendp ? -1 : 0, friendp, 1, 0, sfk,
8495 funcdef_flag, template_count, in_namespace,
8497 if (decl == NULL_TREE)
8498 return error_mark_node;
8500 else if (!staticp && !dependent_type_p (type)
8501 && !COMPLETE_TYPE_P (complete_type (type))
8502 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
8505 error ("field %qD has incomplete type", unqualified_id);
8507 error ("name %qT has incomplete type", type);
8509 /* If we're instantiating a template, tell them which
8510 instantiation made the field's type be incomplete. */
8511 if (current_class_type
8512 && TYPE_NAME (current_class_type)
8513 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
8515 && declspecs->type == type)
8516 error (" in instantiation of template %qT",
8517 current_class_type);
8519 return error_mark_node;
8525 error ("%qE is neither function nor member function; "
8526 "cannot be declared friend", unqualified_id);
8534 /* Friends are treated specially. */
8535 if (ctype == current_class_type)
8536 ; /* We already issued a pedwarn. */
8537 else if (decl && DECL_NAME (decl))
8539 if (template_class_depth (current_class_type) == 0)
8541 decl = check_explicit_specialization
8542 (unqualified_id, decl, template_count,
8543 2 * funcdef_flag + 4);
8544 if (decl == error_mark_node)
8545 return error_mark_node;
8548 decl = do_friend (ctype, unqualified_id, decl,
8554 return error_mark_node;
8557 /* Structure field. It may not be a function, except for C++. */
8559 if (decl == NULL_TREE)
8565 /* An attempt is being made to initialize a non-static
8566 member. But, from [class.mem]:
8568 4 A member-declarator can contain a
8569 constant-initializer only if it declares a static
8570 member (_class.static_) of integral or enumeration
8571 type, see _class.static.data_.
8573 This used to be relatively common practice, but
8574 the rest of the compiler does not correctly
8575 handle the initialization unless the member is
8576 static so we make it static below. */
8577 pedwarn ("ISO C++ forbids initialization of member %qD",
8579 pedwarn ("making %qD static", unqualified_id);
8583 if (uses_template_parms (type))
8584 /* We'll check at instantiation time. */
8586 else if (check_static_variable_definition (unqualified_id,
8588 /* If we just return the declaration, crashes
8589 will sometimes occur. We therefore return
8590 void_type_node, as if this was a friend
8591 declaration, to cause callers to completely
8592 ignore this declaration. */
8593 return error_mark_node;
8598 /* C++ allows static class members. All other work
8599 for this is done by grokfield. */
8600 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
8601 set_linkage_for_static_data_member (decl);
8602 /* Even if there is an in-class initialization, DECL
8603 is considered undefined until an out-of-class
8604 definition is provided. */
8605 DECL_EXTERNAL (decl) = 1;
8609 if (targetm.have_tls)
8610 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
8612 /* A mere warning is sure to result in improper
8613 semantics at runtime. Don't bother to allow this to
8615 error ("thread-local storage not supported for this target");
8620 decl = build_decl (FIELD_DECL, unqualified_id, type);
8621 DECL_NONADDRESSABLE_P (decl) = bitfield;
8622 if (storage_class == sc_mutable)
8624 DECL_MUTABLE_P (decl) = 1;
8625 storage_class = sc_none;
8629 bad_specifiers (decl, "field", virtualp,
8630 memfn_quals != TYPE_UNQUALIFIED,
8631 inlinep, friendp, raises != NULL_TREE);
8634 else if (TREE_CODE (type) == FUNCTION_TYPE
8635 || TREE_CODE (type) == METHOD_TYPE)
8640 if (!unqualified_id)
8641 return error_mark_node;
8643 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
8644 original_name = dname;
8646 original_name = unqualified_id;
8648 if (storage_class == sc_auto)
8649 error ("storage class %<auto%> invalid for function %qs", name);
8650 else if (storage_class == sc_register)
8651 error ("storage class %<register%> invalid for function %qs", name);
8653 error ("storage class %<__thread%> invalid for function %qs", name);
8655 /* Function declaration not at top level.
8656 Storage classes other than `extern' are not allowed
8657 and `extern' makes no difference. */
8658 if (! toplevel_bindings_p ()
8659 && (storage_class == sc_static
8660 || declspecs->specs[(int)ds_inline])
8663 if (storage_class == sc_static)
8664 pedwarn ("%<static%> specified invalid for function %qs "
8665 "declared out of global scope", name);
8667 pedwarn ("%<inline%> specifier invalid for function %qs "
8668 "declared out of global scope", name);
8671 if (ctype == NULL_TREE)
8675 error ("virtual non-class function %qs", name);
8679 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
8680 && !NEW_DELETE_OPNAME_P (original_name))
8681 type = build_method_type_directly (ctype,
8683 TYPE_ARG_TYPES (type));
8685 /* Record presence of `static'. */
8686 publicp = (ctype != NULL_TREE
8687 || storage_class == sc_extern
8688 || storage_class != sc_static);
8690 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
8691 virtualp, flags, memfn_quals, raises,
8693 publicp, inlinep, sfk, funcdef_flag,
8694 template_count, in_namespace, attrlist);
8695 if (decl == NULL_TREE)
8696 return error_mark_node;
8700 int invalid_static = 0;
8702 /* Don't allow a static member function in a class, and forbid
8703 declaring main to be static. */
8704 if (TREE_CODE (type) == METHOD_TYPE)
8706 pedwarn ("cannot declare member function %qD to have "
8707 "static linkage", decl);
8710 else if (current_function_decl)
8712 /* FIXME need arm citation */
8713 error ("cannot declare static function inside another function");
8720 storage_class = sc_none;
8726 /* It's a variable. */
8728 /* An uninitialized decl with `extern' is a reference. */
8729 decl = grokvardecl (type, unqualified_id,
8732 (type_quals & TYPE_QUAL_CONST) != 0,
8733 ctype ? ctype : in_namespace);
8734 bad_specifiers (decl, "variable", virtualp,
8735 memfn_quals != TYPE_UNQUALIFIED,
8736 inlinep, friendp, raises != NULL_TREE);
8740 DECL_CONTEXT (decl) = ctype;
8743 pedwarn ("%<static%> may not be used when defining "
8744 "(as opposed to declaring) a static data member");
8746 storage_class = sc_none;
8748 if (storage_class == sc_register && TREE_STATIC (decl))
8750 error ("static member %qD declared %<register%>", decl);
8751 storage_class = sc_none;
8753 if (storage_class == sc_extern && pedantic)
8755 pedwarn ("cannot explicitly declare member %q#D to have "
8758 storage_class = sc_none;
8763 /* Record `register' declaration for warnings on &
8764 and in case doing stupid register allocation. */
8766 if (storage_class == sc_register)
8767 DECL_REGISTER (decl) = 1;
8768 else if (storage_class == sc_extern)
8769 DECL_THIS_EXTERN (decl) = 1;
8770 else if (storage_class == sc_static)
8771 DECL_THIS_STATIC (decl) = 1;
8773 /* Record constancy and volatility. There's no need to do this
8774 when processing a template; we'll do this for the instantiated
8775 declaration based on the type of DECL. */
8776 if (!processing_template_decl)
8777 cp_apply_type_quals_to_decl (type_quals, decl);
8783 /* Subroutine of start_function. Ensure that each of the parameter
8784 types (as listed in PARMS) is complete, as is required for a
8785 function definition. */
8788 require_complete_types_for_parms (tree parms)
8790 for (; parms; parms = TREE_CHAIN (parms))
8792 if (dependent_type_p (TREE_TYPE (parms)))
8794 if (!VOID_TYPE_P (TREE_TYPE (parms))
8795 && complete_type_or_else (TREE_TYPE (parms), parms))
8797 relayout_decl (parms);
8798 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8801 /* grokparms or complete_type_or_else will have already issued
8803 TREE_TYPE (parms) = error_mark_node;
8807 /* Returns nonzero if T is a local variable. */
8810 local_variable_p (tree t)
8812 if ((TREE_CODE (t) == VAR_DECL
8813 /* A VAR_DECL with a context that is a _TYPE is a static data
8815 && !TYPE_P (CP_DECL_CONTEXT (t))
8816 /* Any other non-local variable must be at namespace scope. */
8817 && !DECL_NAMESPACE_SCOPE_P (t))
8818 || (TREE_CODE (t) == PARM_DECL))
8824 /* Returns nonzero if T is an automatic local variable or a label.
8825 (These are the declarations that need to be remapped when the code
8826 containing them is duplicated.) */
8829 nonstatic_local_decl_p (tree t)
8831 return ((local_variable_p (t) && !TREE_STATIC (t))
8832 || TREE_CODE (t) == LABEL_DECL
8833 || TREE_CODE (t) == RESULT_DECL);
8836 /* Like local_variable_p, but suitable for use as a tree-walking
8840 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8841 void *data ATTRIBUTE_UNUSED)
8843 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8845 else if (TYPE_P (*tp))
8852 /* Check that ARG, which is a default-argument expression for a
8853 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8854 something goes wrong. DECL may also be a _TYPE node, rather than a
8855 DECL, if there is no DECL available. */
8858 check_default_argument (tree decl, tree arg)
8863 if (TREE_CODE (arg) == DEFAULT_ARG)
8864 /* We get a DEFAULT_ARG when looking at an in-class declaration
8865 with a default argument. Ignore the argument for now; we'll
8866 deal with it after the class is complete. */
8875 decl_type = TREE_TYPE (decl);
8877 if (arg == error_mark_node
8878 || decl == error_mark_node
8879 || TREE_TYPE (arg) == error_mark_node
8880 || decl_type == error_mark_node)
8881 /* Something already went wrong. There's no need to check
8883 return error_mark_node;
8885 /* [dcl.fct.default]
8887 A default argument expression is implicitly converted to the
8889 if (!TREE_TYPE (arg)
8890 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
8893 error ("default argument for %q#D has type %qT",
8894 decl, TREE_TYPE (arg));
8896 error ("default argument for parameter of type %qT has type %qT",
8897 decl_type, TREE_TYPE (arg));
8899 return error_mark_node;
8902 /* [dcl.fct.default]
8904 Local variables shall not be used in default argument
8907 The keyword `this' shall not be used in a default argument of a
8909 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8913 error ("default argument %qE uses local variable %qD", arg, var);
8914 return error_mark_node;
8921 /* Decode the list of parameter types for a function type.
8922 Given the list of things declared inside the parens,
8923 return a list of types.
8925 If this parameter does not end with an ellipsis, we append
8928 *PARMS is set to the chain of PARM_DECLs created. */
8931 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8933 tree result = NULL_TREE;
8934 tree decls = NULL_TREE;
8935 int ellipsis = !first_parm || first_parm->ellipsis_p;
8936 cp_parameter_declarator *parm;
8939 for (parm = first_parm; parm != NULL; parm = parm->next)
8941 tree type = NULL_TREE;
8942 tree init = parm->default_argument;
8946 if (parm == no_parameters)
8949 attrs = parm->decl_specifiers.attributes;
8950 parm->decl_specifiers.attributes = NULL_TREE;
8951 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8952 PARM, init != NULL_TREE, &attrs);
8953 if (! decl || TREE_TYPE (decl) == error_mark_node)
8957 cplus_decl_attributes (&decl, attrs, 0);
8959 type = TREE_TYPE (decl);
8960 if (VOID_TYPE_P (type))
8962 if (same_type_p (type, void_type_node)
8963 && DECL_SELF_REFERENCE_P (type)
8964 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8965 /* this is a parmlist of `(void)', which is ok. */
8967 cxx_incomplete_type_error (decl, type);
8968 /* It's not a good idea to actually create parameters of
8969 type `void'; other parts of the compiler assume that a
8970 void type terminates the parameter list. */
8971 type = error_mark_node;
8972 TREE_TYPE (decl) = error_mark_node;
8975 if (type != error_mark_node)
8977 /* Top-level qualifiers on the parameters are
8978 ignored for function types. */
8979 type = cp_build_qualified_type (type, 0);
8980 if (TREE_CODE (type) == METHOD_TYPE)
8982 error ("parameter %qD invalidly declared method type", decl);
8983 type = build_pointer_type (type);
8984 TREE_TYPE (decl) = type;
8986 else if (abstract_virtuals_error (decl, type))
8987 any_error = 1; /* Seems like a good idea. */
8988 else if (POINTER_TYPE_P (type))
8990 /* [dcl.fct]/6, parameter types cannot contain pointers
8991 (references) to arrays of unknown bound. */
8992 tree t = TREE_TYPE (type);
8993 int ptr = TYPE_PTR_P (type);
8999 else if (TREE_CODE (t) != ARRAY_TYPE)
9001 else if (!TYPE_DOMAIN (t))
9005 if (TREE_CODE (t) == ARRAY_TYPE)
9006 error ("parameter %qD includes %s to array of unknown "
9008 decl, ptr ? "pointer" : "reference", t);
9013 else if (init && !processing_template_decl)
9014 init = check_default_argument (decl, init);
9017 TREE_CHAIN (decl) = decls;
9019 result = tree_cons (init, type, result);
9021 decls = nreverse (decls);
9022 result = nreverse (result);
9024 result = chainon (result, void_list_node);
9031 /* D is a constructor or overloaded `operator='.
9033 Let T be the class in which D is declared. Then, this function
9036 -1 if D's is an ill-formed constructor or copy assignment operator
9037 whose first parameter is of type `T'.
9038 0 if D is not a copy constructor or copy assignment
9040 1 if D is a copy constructor or copy assignment operator whose
9041 first parameter is a reference to const qualified T.
9042 2 if D is a copy constructor or copy assignment operator whose
9043 first parameter is a reference to non-const qualified T.
9045 This function can be used as a predicate. Positive values indicate
9046 a copy constructor and nonzero values indicate a copy assignment
9056 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9058 if (TREE_CODE (d) == TEMPLATE_DECL
9059 || (DECL_TEMPLATE_INFO (d)
9060 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9061 /* Instantiations of template member functions are never copy
9062 functions. Note that member functions of templated classes are
9063 represented as template functions internally, and we must
9064 accept those as copy functions. */
9067 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9071 arg_type = TREE_VALUE (args);
9072 if (arg_type == error_mark_node)
9075 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9077 /* Pass by value copy assignment operator. */
9080 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9081 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9083 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9089 args = TREE_CHAIN (args);
9091 if (args && args != void_list_node && !TREE_PURPOSE (args))
9092 /* There are more non-optional args. */
9098 /* Remember any special properties of member function DECL. */
9100 void grok_special_member_properties (tree decl)
9104 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9107 class_type = DECL_CONTEXT (decl);
9108 if (DECL_CONSTRUCTOR_P (decl))
9110 int ctor = copy_fn_p (decl);
9112 TYPE_HAS_CONSTRUCTOR (class_type) = 1;
9118 A non-template constructor for class X is a copy
9119 constructor if its first parameter is of type X&, const
9120 X&, volatile X& or const volatile X&, and either there
9121 are no other parameters or else all other parameters have
9122 default arguments. */
9123 TYPE_HAS_INIT_REF (class_type) = 1;
9125 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9127 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9128 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9130 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9134 A non-template assignment operator for class X is a copy
9135 assignment operator if its parameter is of type X, X&, const
9136 X&, volatile X& or const volatile X&. */
9138 int assop = copy_fn_p (decl);
9142 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9144 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9149 /* Check a constructor DECL has the correct form. Complains
9150 if the class has a constructor of the form X(X). */
9153 grok_ctor_properties (tree ctype, tree decl)
9155 int ctor_parm = copy_fn_p (decl);
9161 A declaration of a constructor for a class X is ill-formed if
9162 its first parameter is of type (optionally cv-qualified) X
9163 and either there are no other parameters or else all other
9164 parameters have default arguments.
9166 We *don't* complain about member template instantiations that
9167 have this form, though; they can occur as we try to decide
9168 what constructor to use during overload resolution. Since
9169 overload resolution will never prefer such a constructor to
9170 the non-template copy constructor (which is either explicitly
9171 or implicitly defined), there's no need to worry about their
9172 existence. Theoretically, they should never even be
9173 instantiated, but that's hard to forestall. */
9174 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
9182 /* An operator with this code is unary, but can also be binary. */
9185 ambi_op_p (enum tree_code code)
9187 return (code == INDIRECT_REF
9188 || code == ADDR_EXPR
9189 || code == UNARY_PLUS_EXPR
9190 || code == NEGATE_EXPR
9191 || code == PREINCREMENT_EXPR
9192 || code == PREDECREMENT_EXPR);
9195 /* An operator with this name can only be unary. */
9198 unary_op_p (enum tree_code code)
9200 return (code == TRUTH_NOT_EXPR
9201 || code == BIT_NOT_EXPR
9202 || code == COMPONENT_REF
9203 || code == TYPE_EXPR);
9206 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
9207 errors are issued for invalid declarations. */
9210 grok_op_properties (tree decl, bool complain)
9212 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
9214 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
9215 tree name = DECL_NAME (decl);
9216 enum tree_code operator_code;
9221 /* Count the number of arguments and check for ellipsis. */
9222 for (argtype = argtypes, arity = 0;
9223 argtype && argtype != void_list_node;
9224 argtype = TREE_CHAIN (argtype))
9226 ellipsis_p = !argtype;
9228 class_type = DECL_CONTEXT (decl);
9229 if (class_type && !CLASS_TYPE_P (class_type))
9230 class_type = NULL_TREE;
9232 if (DECL_CONV_FN_P (decl))
9233 operator_code = TYPE_EXPR;
9237 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
9238 if (ansi_opname (CODE) == name) \
9240 operator_code = (CODE); \
9243 else if (ansi_assopname (CODE) == name) \
9245 operator_code = (CODE); \
9246 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
9250 #include "operators.def"
9256 gcc_assert (operator_code != LAST_CPLUS_TREE_CODE);
9257 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9260 switch (operator_code)
9263 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
9267 TYPE_GETS_DELETE (class_type) |= 1;
9271 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
9274 case VEC_DELETE_EXPR:
9275 TYPE_GETS_DELETE (class_type) |= 2;
9282 /* [basic.std.dynamic.allocation]/1:
9284 A program is ill-formed if an allocation function is declared
9285 in a namespace scope other than global scope or declared static
9288 The same also holds true for deallocation functions. */
9289 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
9290 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9292 if (DECL_NAMESPACE_SCOPE_P (decl))
9294 if (CP_DECL_CONTEXT (decl) != global_namespace)
9296 error ("%qD may not be declared within a namespace", decl);
9299 else if (!TREE_PUBLIC (decl))
9301 error ("%qD may not be declared as static", decl);
9307 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
9308 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
9309 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
9310 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
9313 /* An operator function must either be a non-static member function
9314 or have at least one parameter of a class, a reference to a class,
9315 an enumeration, or a reference to an enumeration. 13.4.0.6 */
9316 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
9318 if (operator_code == TYPE_EXPR
9319 || operator_code == CALL_EXPR
9320 || operator_code == COMPONENT_REF
9321 || operator_code == ARRAY_REF
9322 || operator_code == NOP_EXPR)
9324 error ("%qD must be a nonstatic member function", decl);
9331 if (DECL_STATIC_FUNCTION_P (decl))
9333 error ("%qD must be either a non-static member "
9334 "function or a non-member function", decl);
9338 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
9340 tree arg = non_reference (TREE_VALUE (p));
9341 if (arg == error_mark_node)
9344 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
9345 because these checks are performed even on
9346 template functions. */
9347 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
9351 if (!p || p == void_list_node)
9354 error ("%qD must have an argument of class or "
9355 "enumerated type", decl);
9361 /* There are no restrictions on the arguments to an overloaded
9363 if (operator_code == CALL_EXPR)
9366 /* Warn about conversion operators that will never be used. */
9367 if (IDENTIFIER_TYPENAME_P (name)
9368 && ! DECL_TEMPLATE_INFO (decl)
9370 /* Warn only declaring the function; there is no need to
9371 warn again about out-of-class definitions. */
9372 && class_type == current_class_type)
9374 tree t = TREE_TYPE (name);
9375 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
9376 const char *what = 0;
9379 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
9381 if (TREE_CODE (t) == VOID_TYPE)
9383 else if (class_type)
9385 if (t == class_type)
9386 what = "the same type";
9387 /* Don't force t to be complete here. */
9388 else if (IS_AGGR_TYPE (t)
9389 && COMPLETE_TYPE_P (t)
9390 && DERIVED_FROM_P (t, class_type))
9391 what = "a base class";
9395 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
9396 "conversion operator",
9397 ref ? "a reference to " : "", what);
9400 if (operator_code == COND_EXPR)
9403 error ("ISO C++ prohibits overloading operator ?:");
9406 else if (ellipsis_p)
9408 error ("%qD must not have variable number of arguments", decl);
9411 else if (ambi_op_p (operator_code))
9414 /* We pick the one-argument operator codes by default, so
9415 we don't have to change anything. */
9417 else if (arity == 2)
9419 /* If we thought this was a unary operator, we now know
9420 it to be a binary operator. */
9421 switch (operator_code)
9424 operator_code = MULT_EXPR;
9428 operator_code = BIT_AND_EXPR;
9431 case UNARY_PLUS_EXPR:
9432 operator_code = PLUS_EXPR;
9436 operator_code = MINUS_EXPR;
9439 case PREINCREMENT_EXPR:
9440 operator_code = POSTINCREMENT_EXPR;
9443 case PREDECREMENT_EXPR:
9444 operator_code = POSTDECREMENT_EXPR;
9451 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
9453 if ((operator_code == POSTINCREMENT_EXPR
9454 || operator_code == POSTDECREMENT_EXPR)
9455 && ! processing_template_decl
9456 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
9459 error ("postfix %qD must take %<int%> as its argument",
9462 error ("postfix %qD must take %<int%> as its second "
9470 error ("%qD must take either zero or one argument", decl);
9472 error ("%qD must take either one or two arguments", decl);
9476 /* More Effective C++ rule 6. */
9478 && (operator_code == POSTINCREMENT_EXPR
9479 || operator_code == POSTDECREMENT_EXPR
9480 || operator_code == PREINCREMENT_EXPR
9481 || operator_code == PREDECREMENT_EXPR))
9483 tree arg = TREE_VALUE (argtypes);
9484 tree ret = TREE_TYPE (TREE_TYPE (decl));
9485 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
9486 arg = TREE_TYPE (arg);
9487 arg = TYPE_MAIN_VARIANT (arg);
9488 if (operator_code == PREINCREMENT_EXPR
9489 || operator_code == PREDECREMENT_EXPR)
9491 if (TREE_CODE (ret) != REFERENCE_TYPE
9492 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
9494 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
9495 build_reference_type (arg));
9499 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
9500 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
9504 else if (unary_op_p (operator_code))
9509 error ("%qD must take %<void%>", decl);
9511 error ("%qD must take exactly one argument", decl);
9515 else /* if (binary_op_p (operator_code)) */
9520 error ("%qD must take exactly one argument", decl);
9522 error ("%qD must take exactly two arguments", decl);
9526 /* More Effective C++ rule 7. */
9528 && (operator_code == TRUTH_ANDIF_EXPR
9529 || operator_code == TRUTH_ORIF_EXPR
9530 || operator_code == COMPOUND_EXPR))
9531 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
9535 /* Effective C++ rule 23. */
9538 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
9539 && (operator_code == PLUS_EXPR
9540 || operator_code == MINUS_EXPR
9541 || operator_code == TRUNC_DIV_EXPR
9542 || operator_code == MULT_EXPR
9543 || operator_code == TRUNC_MOD_EXPR)
9544 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
9545 warning (OPT_Weffc__, "%qD should return by value", decl);
9548 for (; argtypes && argtypes != void_list_node;
9549 argtypes = TREE_CHAIN (argtypes))
9550 if (TREE_PURPOSE (argtypes))
9552 TREE_PURPOSE (argtypes) = NULL_TREE;
9553 if (operator_code == POSTINCREMENT_EXPR
9554 || operator_code == POSTDECREMENT_EXPR)
9557 pedwarn ("%qD cannot have default arguments", decl);
9561 error ("%qD cannot have default arguments", decl);
9569 /* Return a string giving the keyword associate with CODE. */
9572 tag_name (enum tag_types code)
9591 /* Name lookup in an elaborated-type-specifier (after the keyword
9592 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
9593 elaborated-type-specifier is invalid, issue a diagnostic and return
9594 error_mark_node; otherwise, return the *_TYPE to which it referred.
9595 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
9598 check_elaborated_type_specifier (enum tag_types tag_code,
9600 bool allow_template_p)
9606 struct S { struct S *p; };
9608 name lookup will find the TYPE_DECL for the implicit "S::S"
9609 typedef. Adjust for that here. */
9610 if (DECL_SELF_REFERENCE_P (decl))
9611 decl = TYPE_NAME (TREE_TYPE (decl));
9613 type = TREE_TYPE (decl);
9615 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
9616 is false for this case as well. */
9617 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9619 error ("using template type parameter %qT after %qs",
9620 type, tag_name (tag_code));
9621 return error_mark_node;
9625 If the identifier resolves to a typedef-name or a template
9626 type-parameter, the elaborated-type-specifier is ill-formed.
9628 In other words, the only legitimate declaration to use in the
9629 elaborated type specifier is the implicit typedef created when
9630 the type is declared. */
9631 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
9632 && tag_code != typename_type)
9634 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
9635 error ("%q+D has a previous declaration here", decl);
9636 return error_mark_node;
9638 else if (TREE_CODE (type) != RECORD_TYPE
9639 && TREE_CODE (type) != UNION_TYPE
9640 && tag_code != enum_type
9641 && tag_code != typename_type)
9643 error ("%qT referred to as %qs", type, tag_name (tag_code));
9644 error ("%q+T has a previous declaration here", type);
9645 return error_mark_node;
9647 else if (TREE_CODE (type) != ENUMERAL_TYPE
9648 && tag_code == enum_type)
9650 error ("%qT referred to as enum", type);
9651 error ("%q+T has a previous declaration here", type);
9652 return error_mark_node;
9654 else if (!allow_template_p
9655 && TREE_CODE (type) == RECORD_TYPE
9656 && CLASSTYPE_IS_TEMPLATE (type))
9658 /* If a class template appears as elaborated type specifier
9659 without a template header such as:
9661 template <class T> class C {};
9662 void f(class C); // No template header here
9664 then the required template argument is missing. */
9665 error ("template argument required for %<%s %T%>",
9666 tag_name (tag_code),
9667 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
9668 return error_mark_node;
9674 /* Lookup NAME in elaborate type specifier in scope according to
9675 SCOPE and issue diagnostics if necessary.
9676 Return *_TYPE node upon success, NULL_TREE when the NAME is not
9677 found, and ERROR_MARK_NODE for type error. */
9680 lookup_and_check_tag (enum tag_types tag_code, tree name,
9681 tag_scope scope, bool template_header_p)
9685 if (scope == ts_global)
9687 /* First try ordinary name lookup, ignoring hidden class name
9688 injected via friend declaration. */
9689 decl = lookup_name_prefer_type (name, 2);
9690 /* If that fails, the name will be placed in the smallest
9691 non-class, non-function-prototype scope according to 3.3.1/5.
9692 We may already have a hidden name declared as friend in this
9693 scope. So lookup again but not ignoring hidden names.
9694 If we find one, that name will be made visible rather than
9695 creating a new tag. */
9697 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
9700 decl = lookup_type_scope (name, scope);
9702 if (decl && DECL_CLASS_TEMPLATE_P (decl))
9703 decl = DECL_TEMPLATE_RESULT (decl);
9705 if (decl && TREE_CODE (decl) == TYPE_DECL)
9707 /* Look for invalid nested type:
9711 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
9713 error ("%qD has the same name as the class in which it is "
9716 return error_mark_node;
9719 /* Two cases we need to consider when deciding if a class
9720 template is allowed as an elaborated type specifier:
9721 1. It is a self reference to its own class.
9722 2. It comes with a template header.
9726 template <class T> class C {
9727 class C *c1; // DECL_SELF_REFERENCE_P is true
9730 template <class U> class C; // template_header_p is true
9731 template <class T> class C<T>::D {
9732 class C *c2; // DECL_SELF_REFERENCE_P is true
9735 t = check_elaborated_type_specifier (tag_code,
9738 | DECL_SELF_REFERENCE_P (decl));
9745 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
9746 Define the tag as a forward-reference if it is not defined.
9748 If a declaration is given, process it here, and report an error if
9749 multiple declarations are not identical.
9751 SCOPE is TS_CURRENT when this is also a definition. Only look in
9752 the current frame for the name (since C++ allows new names in any
9753 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
9754 declaration. Only look beginning from the current scope outward up
9755 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
9757 TEMPLATE_HEADER_P is true when this declaration is preceded by
9758 a set of template parameters. */
9761 xref_tag (enum tag_types tag_code, tree name,
9762 tag_scope scope, bool template_header_p)
9764 enum tree_code code;
9766 tree context = NULL_TREE;
9768 timevar_push (TV_NAME_LOOKUP);
9770 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
9782 code = ENUMERAL_TYPE;
9788 /* In case of anonymous name, xref_tag is only called to
9789 make type node and push name. Name lookup is not required. */
9790 if (ANON_AGGRNAME_P (name))
9793 t = lookup_and_check_tag (tag_code, name,
9794 scope, template_header_p);
9796 if (t == error_mark_node)
9797 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9799 if (scope != ts_current && t && current_class_type
9800 && template_class_depth (current_class_type)
9801 && template_header_p)
9803 /* Since SCOPE is not TS_CURRENT, we are not looking at a
9804 definition of this tag. Since, in addition, we are currently
9805 processing a (member) template declaration of a template
9806 class, we must be very careful; consider:
9813 { template <class V>
9814 friend struct S1; };
9816 Here, the S2::S1 declaration should not be confused with the
9817 outer declaration. In particular, the inner version should
9818 have a template parameter of level 2, not level 1. This
9819 would be particularly important if the member declaration
9822 template <class V = U> friend struct S1;
9824 say, when we should tsubst into `U' when instantiating
9825 S2. On the other hand, when presented with:
9835 we must find the inner binding eventually. We
9836 accomplish this by making sure that the new type we
9837 create to represent this declaration has the right
9839 context = TYPE_CONTEXT (t);
9845 /* If no such tag is yet defined, create a forward-reference node
9846 and record it as the "definition".
9847 When a real declaration of this type is found,
9848 the forward-reference will be altered into a real type. */
9849 if (code == ENUMERAL_TYPE)
9851 error ("use of enum %q#D without previous declaration", name);
9852 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9856 t = make_aggr_type (code);
9857 TYPE_CONTEXT (t) = context;
9858 t = pushtag (name, t, scope);
9863 if (template_header_p && IS_AGGR_TYPE (t))
9865 if (!redeclare_class_template (t, current_template_parms))
9866 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9868 else if (!processing_template_decl
9870 && CLASSTYPE_IS_TEMPLATE (t))
9872 error ("redeclaration of %qT as a non-template", t);
9873 error ("previous declaration %q+D", t);
9874 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
9877 /* Make injected friend class visible. */
9878 if (scope != ts_within_enclosing_non_class
9879 && hidden_name_p (TYPE_NAME (t)))
9881 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
9882 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
9884 if (TYPE_TEMPLATE_INFO (t))
9886 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
9887 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
9892 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9896 xref_tag_from_type (tree old, tree id, tag_scope scope)
9898 enum tag_types tag_kind;
9900 if (TREE_CODE (old) == RECORD_TYPE)
9901 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9903 tag_kind = union_type;
9905 if (id == NULL_TREE)
9906 id = TYPE_IDENTIFIER (old);
9908 return xref_tag (tag_kind, id, scope, false);
9911 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9912 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9913 access_* node, and the TREE_VALUE is the type of the base-class.
9914 Non-NULL TREE_TYPE indicates virtual inheritance.
9916 Returns true if the binfo heirarchy was successfully created,
9917 false if an error was detected. */
9920 xref_basetypes (tree ref, tree base_list)
9923 tree binfo, base_binfo;
9924 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
9925 unsigned max_bases = 0; /* Maximum direct bases. */
9927 tree default_access;
9928 tree igo_prev; /* Track Inheritance Graph Order. */
9930 if (ref == error_mark_node)
9933 /* The base of a derived class is private by default, all others are
9935 default_access = (TREE_CODE (ref) == RECORD_TYPE
9936 && CLASSTYPE_DECLARED_CLASS (ref)
9937 ? access_private_node : access_public_node);
9939 /* First, make sure that any templates in base-classes are
9940 instantiated. This ensures that if we call ourselves recursively
9941 we do not get confused about which classes are marked and which
9946 tree basetype = TREE_VALUE (*basep);
9948 if (!(processing_template_decl && uses_template_parms (basetype))
9949 && !complete_type_or_else (basetype, NULL))
9950 /* An incomplete type. Remove it from the list. */
9951 *basep = TREE_CHAIN (*basep);
9955 if (TREE_TYPE (*basep))
9957 if (CLASS_TYPE_P (basetype))
9958 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9959 basep = &TREE_CHAIN (*basep);
9963 TYPE_MARKED_P (ref) = 1;
9965 /* The binfo slot should be empty, unless this is an (ill-formed)
9967 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
9968 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
9970 binfo = make_tree_binfo (max_bases);
9972 TYPE_BINFO (ref) = binfo;
9973 BINFO_OFFSET (binfo) = size_zero_node;
9974 BINFO_TYPE (binfo) = ref;
9978 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
9979 /* An aggregate cannot have baseclasses. */
9980 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9982 if (TREE_CODE (ref) == UNION_TYPE)
9984 error ("derived union %qT invalid", ref);
9991 if (TYPE_FOR_JAVA (ref))
9993 error ("Java class %qT cannot have multiple bases", ref);
10000 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10002 if (TYPE_FOR_JAVA (ref))
10004 error ("Java class %qT cannot have virtual bases", ref);
10009 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10011 tree access = TREE_PURPOSE (base_list);
10012 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10013 tree basetype = TREE_VALUE (base_list);
10015 if (access == access_default_node)
10016 access = default_access;
10018 if (TREE_CODE (basetype) == TYPE_DECL)
10019 basetype = TREE_TYPE (basetype);
10020 if (TREE_CODE (basetype) != RECORD_TYPE
10021 && TREE_CODE (basetype) != TYPENAME_TYPE
10022 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
10023 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
10025 error ("base type %qT fails to be a struct or class type",
10030 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10031 TYPE_FOR_JAVA (ref) = 1;
10033 base_binfo = NULL_TREE;
10034 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10036 base_binfo = TYPE_BINFO (basetype);
10037 /* The original basetype could have been a typedef'd type. */
10038 basetype = BINFO_TYPE (base_binfo);
10040 /* Inherit flags from the base. */
10041 TYPE_HAS_NEW_OPERATOR (ref)
10042 |= TYPE_HAS_NEW_OPERATOR (basetype);
10043 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10044 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10045 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10046 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10047 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10048 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10049 CLASSTYPE_REPEATED_BASE_P (ref)
10050 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10053 /* We must do this test after we've seen through a typedef
10055 if (TYPE_MARKED_P (basetype))
10057 if (basetype == ref)
10058 error ("recursive type %qT undefined", basetype);
10060 error ("duplicate base type %qT invalid", basetype);
10063 TYPE_MARKED_P (basetype) = 1;
10065 base_binfo = copy_binfo (base_binfo, basetype, ref,
10066 &igo_prev, via_virtual);
10067 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10068 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10070 BINFO_BASE_APPEND (binfo, base_binfo);
10071 BINFO_BASE_ACCESS_APPEND (binfo, access);
10074 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10075 /* If we have space in the vbase vector, we must have shared at
10076 least one of them, and are therefore diamond shaped. */
10077 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10079 /* Unmark all the types. */
10080 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10081 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10082 TYPE_MARKED_P (ref) = 0;
10084 /* Now see if we have a repeated base type. */
10085 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10087 for (base_binfo = binfo; base_binfo;
10088 base_binfo = TREE_CHAIN (base_binfo))
10090 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10092 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10095 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10097 for (base_binfo = binfo; base_binfo;
10098 base_binfo = TREE_CHAIN (base_binfo))
10099 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10100 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10109 /* Begin compiling the definition of an enumeration type.
10111 Returns the type object, as yet incomplete.
10112 Also records info about it so that build_enumerator
10113 may be used to declare the individual values as they are read. */
10116 start_enum (tree name)
10120 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10122 /* If this is the real definition for a previous forward reference,
10123 fill in the contents in the same object that used to be the
10124 forward reference. */
10126 enumtype = lookup_and_check_tag (enum_type, name,
10127 /*tag_scope=*/ts_current,
10128 /*template_header_p=*/false);
10130 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10132 error ("multiple definition of %q#T", enumtype);
10133 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10134 /* Clear out TYPE_VALUES, and start again. */
10135 TYPE_VALUES (enumtype) = NULL_TREE;
10139 /* In case of error, make a dummy enum to allow parsing to
10141 if (enumtype == error_mark_node)
10142 name = make_anon_name ();
10144 enumtype = make_node (ENUMERAL_TYPE);
10145 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10151 /* After processing and defining all the values of an enumeration type,
10152 install their decls in the enumeration type and finish it off.
10153 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
10156 finish_enum (tree enumtype)
10165 bool use_short_enum;
10169 integer_type_kind itk;
10170 tree underlying_type = NULL_TREE;
10172 /* We built up the VALUES in reverse order. */
10173 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
10175 /* For an enum defined in a template, just set the type of the values;
10176 all further processing is postponed until the template is
10177 instantiated. We need to set the type so that tsubst of a CONST_DECL
10179 if (processing_template_decl)
10181 for (values = TYPE_VALUES (enumtype);
10183 values = TREE_CHAIN (values))
10184 TREE_TYPE (TREE_VALUE (values)) = enumtype;
10185 if (at_function_scope_p ())
10186 add_stmt (build_min (TAG_DEFN, enumtype));
10190 /* Determine the minimum and maximum values of the enumerators. */
10191 if (TYPE_VALUES (enumtype))
10193 minnode = maxnode = NULL_TREE;
10195 for (values = TYPE_VALUES (enumtype);
10197 values = TREE_CHAIN (values))
10199 decl = TREE_VALUE (values);
10201 /* [dcl.enum]: Following the closing brace of an enum-specifier,
10202 each enumerator has the type of its enumeration. Prior to the
10203 closing brace, the type of each enumerator is the type of its
10204 initializing value. */
10205 TREE_TYPE (decl) = enumtype;
10207 /* Update the minimum and maximum values, if appropriate. */
10208 value = DECL_INITIAL (decl);
10209 if (value == error_mark_node)
10210 value = integer_zero_node;
10211 /* Figure out what the minimum and maximum values of the
10212 enumerators are. */
10214 minnode = maxnode = value;
10215 else if (tree_int_cst_lt (maxnode, value))
10217 else if (tree_int_cst_lt (value, minnode))
10224 If the enumerator-list is empty, the underlying type is as if
10225 the enumeration had a single enumerator with value 0. */
10226 minnode = maxnode = integer_zero_node;
10228 /* Compute the number of bits require to represent all values of the
10229 enumeration. We must do this before the type of MINNODE and
10230 MAXNODE are transformed, since min_precision relies on the
10231 TREE_TYPE of the value it is passed. */
10232 unsignedp = tree_int_cst_sgn (minnode) >= 0;
10233 lowprec = min_precision (minnode, unsignedp);
10234 highprec = min_precision (maxnode, unsignedp);
10235 precision = MAX (lowprec, highprec);
10237 /* Determine the underlying type of the enumeration.
10241 The underlying type of an enumeration is an integral type that
10242 can represent all the enumerator values defined in the
10243 enumeration. It is implementation-defined which integral type is
10244 used as the underlying type for an enumeration except that the
10245 underlying type shall not be larger than int unless the value of
10246 an enumerator cannot fit in an int or unsigned int.
10248 We use "int" or an "unsigned int" as the underlying type, even if
10249 a smaller integral type would work, unless the user has
10250 explicitly requested that we use the smallest possible type. The
10251 user can request that for all enumerations with a command line
10252 flag, or for just one enumeration with an attribute. */
10254 use_short_enum = flag_short_enums
10255 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
10257 for (itk = (use_short_enum ? itk_char : itk_int);
10261 underlying_type = integer_types[itk];
10262 if (TYPE_PRECISION (underlying_type) >= precision
10263 && TYPE_UNSIGNED (underlying_type) == unsignedp)
10266 if (itk == itk_none)
10270 IF no integral type can represent all the enumerator values, the
10271 enumeration is ill-formed. */
10272 error ("no integral type can represent all of the enumerator values "
10273 "for %qT", enumtype);
10274 precision = TYPE_PRECISION (long_long_integer_type_node);
10275 underlying_type = integer_types[itk_unsigned_long_long];
10278 /* Compute the minium and maximum values for the type.
10282 For an enumeration where emin is the smallest enumerator and emax
10283 is the largest, the values of the enumeration are the values of the
10284 underlying type in the range bmin to bmax, where bmin and bmax are,
10285 respectively, the smallest and largest values of the smallest bit-
10286 field that can store emin and emax. */
10288 /* The middle-end currently assumes that types with TYPE_PRECISION
10289 narrower than their underlying type are suitably zero or sign
10290 extended to fill their mode. g++ doesn't make these guarantees.
10291 Until the middle-end can represent such paradoxical types, we
10292 set the TYPE_PRECISION to the width of the underlying type. */
10293 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
10295 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
10299 The value of sizeof() applied to an enumeration type, an object
10300 of an enumeration type, or an enumerator, is the value of sizeof()
10301 applied to the underlying type. */
10302 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
10303 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
10304 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
10305 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
10306 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
10307 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
10309 /* Convert each of the enumerators to the type of the underlying
10310 type of the enumeration. */
10311 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
10313 location_t saved_location;
10315 decl = TREE_VALUE (values);
10316 saved_location = input_location;
10317 input_location = DECL_SOURCE_LOCATION (decl);
10318 value = perform_implicit_conversion (underlying_type,
10319 DECL_INITIAL (decl));
10320 input_location = saved_location;
10322 /* Do not clobber shared ints. */
10323 value = copy_node (value);
10325 TREE_TYPE (value) = enumtype;
10326 DECL_INITIAL (decl) = value;
10327 TREE_VALUE (values) = value;
10330 /* Fix up all variant types of this enum type. */
10331 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
10333 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
10334 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
10335 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
10336 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
10337 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
10338 TYPE_MODE (t) = TYPE_MODE (enumtype);
10339 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
10340 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
10341 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
10342 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
10345 /* Finish debugging output for this type. */
10346 rest_of_type_compilation (enumtype, namespace_bindings_p ());
10349 /* Build and install a CONST_DECL for an enumeration constant of the
10350 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
10351 Assignment of sequential values by default is handled here. */
10354 build_enumerator (tree name, tree value, tree enumtype)
10360 /* If the VALUE was erroneous, pretend it wasn't there; that will
10361 result in the enum being assigned the next value in sequence. */
10362 if (value == error_mark_node)
10365 /* Remove no-op casts from the value. */
10367 STRIP_TYPE_NOPS (value);
10369 if (! processing_template_decl)
10371 /* Validate and default VALUE. */
10372 if (value != NULL_TREE)
10374 value = integral_constant_value (value);
10376 if (TREE_CODE (value) == INTEGER_CST)
10378 value = perform_integral_promotions (value);
10379 constant_expression_warning (value);
10383 error ("enumerator value for %qD not integer constant", name);
10388 /* Default based on previous value. */
10389 if (value == NULL_TREE)
10391 if (TYPE_VALUES (enumtype))
10394 unsigned HOST_WIDE_INT lo;
10398 /* The next value is the previous value plus one. We can
10399 safely assume that the previous value is an INTEGER_CST.
10400 add_double doesn't know the type of the target expression,
10401 so we must check with int_fits_type_p as well. */
10402 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
10403 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
10404 TREE_INT_CST_HIGH (prev_value),
10406 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
10407 overflowed |= !int_fits_type_p (value, TREE_TYPE (prev_value));
10411 error ("overflow in enumeration values at %qD", name);
10412 value = error_mark_node;
10416 value = integer_zero_node;
10419 /* Remove no-op casts from the value. */
10420 STRIP_TYPE_NOPS (value);
10423 /* C++ associates enums with global, function, or class declarations. */
10424 context = current_scope ();
10426 /* Build the actual enumeration constant. Note that the enumeration
10427 constants have the type of their initializers until the
10428 enumeration is complete:
10432 Following the closing brace of an enum-specifier, each enumer-
10433 ator has the type of its enumeration. Prior to the closing
10434 brace, the type of each enumerator is the type of its
10435 initializing value.
10437 In finish_enum we will reset the type. Of course, if we're
10438 processing a template, there may be no value. */
10439 type = value ? TREE_TYPE (value) : NULL_TREE;
10441 if (context && context == current_class_type)
10442 /* This enum declaration is local to the class. We need the full
10443 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
10444 decl = build_lang_decl (CONST_DECL, name, type);
10446 /* It's a global enum, or it's local to a function. (Note local to
10447 a function could mean local to a class method. */
10448 decl = build_decl (CONST_DECL, name, type);
10450 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
10451 TREE_CONSTANT (decl) = 1;
10452 TREE_INVARIANT (decl) = 1;
10453 TREE_READONLY (decl) = 1;
10454 DECL_INITIAL (decl) = value;
10456 if (context && context == current_class_type)
10457 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
10458 on the TYPE_FIELDS list for `S'. (That's so that you can say
10459 things like `S::i' later.) */
10460 finish_member_declaration (decl);
10464 /* Add this enumeration constant to the list for this type. */
10465 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
10469 /* We're defining DECL. Make sure that it's type is OK. */
10472 check_function_type (tree decl, tree current_function_parms)
10474 tree fntype = TREE_TYPE (decl);
10475 tree return_type = complete_type (TREE_TYPE (fntype));
10477 /* In a function definition, arg types must be complete. */
10478 require_complete_types_for_parms (current_function_parms);
10480 if (dependent_type_p (return_type))
10482 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
10484 tree args = TYPE_ARG_TYPES (fntype);
10486 error ("return type %q#T is incomplete", return_type);
10488 /* Make it return void instead. */
10489 if (TREE_CODE (fntype) == METHOD_TYPE)
10490 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
10492 TREE_CHAIN (args));
10494 fntype = build_function_type (void_type_node, args);
10496 = build_exception_variant (fntype,
10497 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
10500 abstract_virtuals_error (decl, TREE_TYPE (fntype));
10503 /* Create the FUNCTION_DECL for a function definition.
10504 DECLSPECS and DECLARATOR are the parts of the declaration;
10505 they describe the function's name and the type it returns,
10506 but twisted together in a fashion that parallels the syntax of C.
10508 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
10509 DECLARATOR is really the DECL for the function we are about to
10510 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
10511 indicating that the function is an inline defined in-class.
10513 This function creates a binding context for the function body
10514 as well as setting up the FUNCTION_DECL in current_function_decl.
10516 For C++, we must first check whether that datum makes any sense.
10517 For example, "class A local_a(1,2);" means that variable local_a
10518 is an aggregate of type A, which should have a constructor
10519 applied to it with the argument list [1, 2].
10521 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
10522 or may be a BLOCK if the function has been defined previously
10523 in this translation unit. On exit, DECL_INITIAL (decl1) will be
10524 error_mark_node if the function has never been defined, or
10525 a BLOCK if the function has been defined somewhere. */
10528 start_preparsed_function (tree decl1, tree attrs, int flags)
10530 tree ctype = NULL_TREE;
10533 int doing_friend = 0;
10534 struct cp_binding_level *bl;
10535 tree current_function_parms;
10536 struct c_fileinfo *finfo
10537 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
10538 bool honor_interface;
10540 /* Sanity check. */
10541 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
10542 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
10544 fntype = TREE_TYPE (decl1);
10545 if (TREE_CODE (fntype) == METHOD_TYPE)
10546 ctype = TYPE_METHOD_BASETYPE (fntype);
10548 /* ISO C++ 11.4/5. A friend function defined in a class is in
10549 the (lexical) scope of the class in which it is defined. */
10550 if (!ctype && DECL_FRIEND_P (decl1))
10552 ctype = DECL_FRIEND_CONTEXT (decl1);
10554 /* CTYPE could be null here if we're dealing with a template;
10555 for example, `inline friend float foo()' inside a template
10556 will have no CTYPE set. */
10557 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
10563 if (DECL_DECLARED_INLINE_P (decl1)
10564 && lookup_attribute ("noinline", attrs))
10565 warning (0, "inline function %q+D given attribute noinline", decl1);
10567 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
10568 /* This is a constructor, we must ensure that any default args
10569 introduced by this definition are propagated to the clones
10570 now. The clones are used directly in overload resolution. */
10571 adjust_clone_args (decl1);
10573 /* Sometimes we don't notice that a function is a static member, and
10574 build a METHOD_TYPE for it. Fix that up now. */
10575 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
10576 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
10578 revert_static_member_fn (decl1);
10582 /* Set up current_class_type, and enter the scope of the class, if
10585 push_nested_class (ctype);
10586 else if (DECL_STATIC_FUNCTION_P (decl1))
10587 push_nested_class (DECL_CONTEXT (decl1));
10589 /* Now that we have entered the scope of the class, we must restore
10590 the bindings for any template parameters surrounding DECL1, if it
10591 is an inline member template. (Order is important; consider the
10592 case where a template parameter has the same name as a field of
10593 the class.) It is not until after this point that
10594 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
10595 if (flags & SF_INCLASS_INLINE)
10596 maybe_begin_member_template_processing (decl1);
10598 /* Effective C++ rule 15. */
10600 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
10601 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
10602 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
10604 /* Make the init_value nonzero so pushdecl knows this is not tentative.
10605 error_mark_node is replaced below (in poplevel) with the BLOCK. */
10606 if (!DECL_INITIAL (decl1))
10607 DECL_INITIAL (decl1) = error_mark_node;
10609 /* This function exists in static storage.
10610 (This does not mean `static' in the C sense!) */
10611 TREE_STATIC (decl1) = 1;
10613 /* We must call push_template_decl after current_class_type is set
10614 up. (If we are processing inline definitions after exiting a
10615 class scope, current_class_type will be NULL_TREE until set above
10616 by push_nested_class.) */
10617 if (processing_template_decl)
10619 /* FIXME: Handle error_mark_node more gracefully. */
10620 tree newdecl1 = push_template_decl (decl1);
10621 if (newdecl1 != error_mark_node)
10625 /* We are now in the scope of the function being defined. */
10626 current_function_decl = decl1;
10628 /* Save the parm names or decls from this function's declarator
10629 where store_parm_decls will find them. */
10630 current_function_parms = DECL_ARGUMENTS (decl1);
10632 /* Make sure the parameter and return types are reasonable. When
10633 you declare a function, these types can be incomplete, but they
10634 must be complete when you define the function. */
10635 check_function_type (decl1, current_function_parms);
10637 /* Build the return declaration for the function. */
10638 restype = TREE_TYPE (fntype);
10639 /* Promote the value to int before returning it. */
10640 if (c_promoting_integer_type_p (restype))
10641 restype = type_promotes_to (restype);
10642 if (DECL_RESULT (decl1) == NULL_TREE)
10646 resdecl = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
10647 DECL_ARTIFICIAL (resdecl) = 1;
10648 DECL_IGNORED_P (resdecl) = 1;
10649 DECL_RESULT (decl1) = resdecl;
10651 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
10654 /* Let the user know we're compiling this function. */
10655 announce_function (decl1);
10657 /* Record the decl so that the function name is defined.
10658 If we already have a decl for this name, and it is a FUNCTION_DECL,
10659 use the old decl. */
10660 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
10662 /* A specialization is not used to guide overload resolution. */
10663 if (!DECL_FUNCTION_MEMBER_P (decl1)
10664 && !(DECL_USE_TEMPLATE (decl1) &&
10665 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
10667 tree olddecl = pushdecl (decl1);
10669 if (olddecl == error_mark_node)
10670 /* If something went wrong when registering the declaration,
10671 use DECL1; we have to have a FUNCTION_DECL to use when
10672 parsing the body of the function. */
10675 /* Otherwise, OLDDECL is either a previous declaration of
10676 the same function or DECL1 itself. */
10681 /* We need to set the DECL_CONTEXT. */
10682 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
10683 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
10685 fntype = TREE_TYPE (decl1);
10687 /* If #pragma weak applies, mark the decl appropriately now.
10688 The pragma only applies to global functions. Because
10689 determining whether or not the #pragma applies involves
10690 computing the mangled name for the declaration, we cannot
10691 apply the pragma until after we have merged this declaration
10692 with any previous declarations; if the original declaration
10693 has a linkage specification, that specification applies to
10694 the definition as well, and may affect the mangled name. */
10695 if (!DECL_CONTEXT (decl1))
10696 maybe_apply_pragma_weak (decl1);
10699 /* Reset this in case the call to pushdecl changed it. */
10700 current_function_decl = decl1;
10702 gcc_assert (DECL_INITIAL (decl1));
10704 /* This function may already have been parsed, in which case just
10705 return; our caller will skip over the body without parsing. */
10706 if (DECL_INITIAL (decl1) != error_mark_node)
10709 /* Initialize RTL machinery. We cannot do this until
10710 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
10711 even when processing a template; this is how we get
10712 CFUN set up, and our per-function variables initialized.
10713 FIXME factor out the non-RTL stuff. */
10714 bl = current_binding_level;
10715 allocate_struct_function (decl1);
10716 current_binding_level = bl;
10718 /* Even though we're inside a function body, we still don't want to
10719 call expand_expr to calculate the size of a variable-sized array.
10720 We haven't necessarily assigned RTL to all variables yet, so it's
10721 not safe to try to expand expressions involving them. */
10722 cfun->x_dont_save_pending_sizes_p = 1;
10724 /* Start the statement-tree, start the tree now. */
10725 DECL_SAVED_TREE (decl1) = push_stmt_list ();
10727 /* If we are (erroneously) defining a function that we have already
10728 defined before, wipe out what we knew before. */
10729 if (!DECL_PENDING_INLINE_P (decl1))
10730 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
10732 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
10734 /* We know that this was set up by `grokclassfn'. We do not
10735 wait until `store_parm_decls', since evil parse errors may
10736 never get us to that point. Here we keep the consistency
10737 between `current_class_type' and `current_class_ptr'. */
10738 tree t = DECL_ARGUMENTS (decl1);
10740 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
10741 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
10743 cp_function_chain->x_current_class_ref
10744 = build_indirect_ref (t, NULL);
10745 cp_function_chain->x_current_class_ptr = t;
10747 /* Constructors and destructors need to know whether they're "in
10748 charge" of initializing virtual base classes. */
10749 t = TREE_CHAIN (t);
10750 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
10752 current_in_charge_parm = t;
10753 t = TREE_CHAIN (t);
10755 if (DECL_HAS_VTT_PARM_P (decl1))
10757 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
10758 current_vtt_parm = t;
10762 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
10763 /* Implicitly-defined methods (like the
10764 destructor for a class in which no destructor
10765 is explicitly declared) must not be defined
10766 until their definition is needed. So, we
10767 ignore interface specifications for
10768 compiler-generated functions. */
10769 && !DECL_ARTIFICIAL (decl1));
10771 if (DECL_INTERFACE_KNOWN (decl1))
10773 tree ctx = decl_function_context (decl1);
10775 if (DECL_NOT_REALLY_EXTERN (decl1))
10776 DECL_EXTERNAL (decl1) = 0;
10778 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
10779 && TREE_PUBLIC (ctx))
10780 /* This is a function in a local class in an extern inline
10782 comdat_linkage (decl1);
10784 /* If this function belongs to an interface, it is public.
10785 If it belongs to someone else's interface, it is also external.
10786 This only affects inlines and template instantiations. */
10787 else if (!finfo->interface_unknown && honor_interface)
10789 if (DECL_DECLARED_INLINE_P (decl1)
10790 || DECL_TEMPLATE_INSTANTIATION (decl1)
10791 || processing_template_decl)
10793 DECL_EXTERNAL (decl1)
10794 = (finfo->interface_only
10795 || (DECL_DECLARED_INLINE_P (decl1)
10796 && ! flag_implement_inlines
10797 && !DECL_VINDEX (decl1)));
10799 /* For WIN32 we also want to put these in linkonce sections. */
10800 maybe_make_one_only (decl1);
10803 DECL_EXTERNAL (decl1) = 0;
10804 DECL_INTERFACE_KNOWN (decl1) = 1;
10805 /* If this function is in an interface implemented in this file,
10806 make sure that the backend knows to emit this function
10808 if (!DECL_EXTERNAL (decl1))
10809 mark_needed (decl1);
10811 else if (finfo->interface_unknown && finfo->interface_only
10812 && honor_interface)
10814 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
10815 interface, we will have both finfo->interface_unknown and
10816 finfo->interface_only set. In that case, we don't want to
10817 use the normal heuristics because someone will supply a
10818 #pragma implementation elsewhere, and deducing it here would
10819 produce a conflict. */
10820 comdat_linkage (decl1);
10821 DECL_EXTERNAL (decl1) = 0;
10822 DECL_INTERFACE_KNOWN (decl1) = 1;
10823 DECL_DEFER_OUTPUT (decl1) = 1;
10827 /* This is a definition, not a reference.
10828 So clear DECL_EXTERNAL. */
10829 DECL_EXTERNAL (decl1) = 0;
10831 if ((DECL_DECLARED_INLINE_P (decl1)
10832 || DECL_TEMPLATE_INSTANTIATION (decl1))
10833 && ! DECL_INTERFACE_KNOWN (decl1)
10834 /* Don't try to defer nested functions for now. */
10835 && ! decl_function_context (decl1))
10836 DECL_DEFER_OUTPUT (decl1) = 1;
10838 DECL_INTERFACE_KNOWN (decl1) = 1;
10841 /* Determine the ELF visibility attribute for the function. We must not
10842 do this before calling "pushdecl", as we must allow "duplicate_decls"
10843 to merge any attributes appropriately. We also need to wait until
10845 if (!DECL_CLONED_FUNCTION_P (decl1))
10846 determine_visibility (decl1);
10848 begin_scope (sk_function_parms, decl1);
10852 if (DECL_DESTRUCTOR_P (decl1)
10853 || (DECL_CONSTRUCTOR_P (decl1)
10854 && targetm.cxx.cdtor_returns_this ()))
10856 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
10857 DECL_CONTEXT (cdtor_label) = current_function_decl;
10860 start_fname_decls ();
10862 store_parm_decls (current_function_parms);
10866 /* Like start_preparsed_function, except that instead of a
10867 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
10869 Returns 1 on success. If the DECLARATOR is not suitable for a function
10870 (it defines a datum instead), we return 0, which tells
10871 yyparse to report a parse error. */
10874 start_function (cp_decl_specifier_seq *declspecs,
10875 const cp_declarator *declarator,
10880 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
10881 /* If the declarator is not suitable for a function definition,
10882 cause a syntax error. */
10883 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
10886 if (DECL_MAIN_P (decl1))
10887 /* main must return int. grokfndecl should have corrected it
10888 (and issued a diagnostic) if the user got it wrong. */
10889 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
10890 integer_type_node));
10892 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
10897 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
10901 use_eh_spec_block (tree fn)
10903 return (flag_exceptions && flag_enforce_eh_specs
10904 && !processing_template_decl
10905 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
10906 /* We insert the EH_SPEC_BLOCK only in the original
10907 function; then, it is copied automatically to the
10909 && !DECL_CLONED_FUNCTION_P (fn)
10910 /* Implicitly-generated constructors and destructors have
10911 exception specifications. However, those specifications
10912 are the union of the possible exceptions specified by the
10913 constructors/destructors for bases and members, so no
10914 unallowed exception will ever reach this function. By
10915 not creating the EH_SPEC_BLOCK we save a little memory,
10916 and we avoid spurious warnings about unreachable
10918 && !DECL_ARTIFICIAL (fn));
10921 /* Store the parameter declarations into the current function declaration.
10922 This is called after parsing the parameter declarations, before
10923 digesting the body of the function.
10925 Also install to binding contour return value identifier, if any. */
10928 store_parm_decls (tree current_function_parms)
10930 tree fndecl = current_function_decl;
10933 /* This is a chain of any other decls that came in among the parm
10934 declarations. If a parm is declared with enum {foo, bar} x;
10935 then CONST_DECLs for foo and bar are put here. */
10936 tree nonparms = NULL_TREE;
10938 if (current_function_parms)
10940 /* This case is when the function was defined with an ANSI prototype.
10941 The parms already have decls, so we need not do anything here
10942 except record them as in effect
10943 and complain if any redundant old-style parm decls were written. */
10945 tree specparms = current_function_parms;
10948 /* Must clear this because it might contain TYPE_DECLs declared
10950 current_binding_level->names = NULL;
10952 /* If we're doing semantic analysis, then we'll call pushdecl
10953 for each of these. We must do them in reverse order so that
10954 they end in the correct forward order. */
10955 specparms = nreverse (specparms);
10957 for (parm = specparms; parm; parm = next)
10959 next = TREE_CHAIN (parm);
10960 if (TREE_CODE (parm) == PARM_DECL)
10962 if (DECL_NAME (parm) == NULL_TREE
10963 || TREE_CODE (parm) != VOID_TYPE)
10966 error ("parameter %qD declared void", parm);
10970 /* If we find an enum constant or a type tag,
10971 put it aside for the moment. */
10972 TREE_CHAIN (parm) = NULL_TREE;
10973 nonparms = chainon (nonparms, parm);
10977 /* Get the decls in their original chain order and record in the
10978 function. This is all and only the PARM_DECLs that were
10979 pushed into scope by the loop above. */
10980 DECL_ARGUMENTS (fndecl) = getdecls ();
10983 DECL_ARGUMENTS (fndecl) = NULL_TREE;
10985 /* Now store the final chain of decls for the arguments
10986 as the decl-chain of the current lexical scope.
10987 Put the enumerators in as well, at the front so that
10988 DECL_ARGUMENTS is not modified. */
10989 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
10991 if (use_eh_spec_block (current_function_decl))
10992 current_eh_spec_block = begin_eh_spec_block ();
10996 /* We have finished doing semantic analysis on DECL, but have not yet
10997 generated RTL for its body. Save away our current state, so that
10998 when we want to generate RTL later we know what to do. */
11001 save_function_data (tree decl)
11003 struct language_function *f;
11005 /* Save the language-specific per-function data so that we can
11006 get it back when we really expand this function. */
11007 gcc_assert (!DECL_PENDING_INLINE_P (decl));
11010 f = GGC_NEW (struct language_function);
11011 memcpy (f, cp_function_chain, sizeof (struct language_function));
11012 DECL_SAVED_FUNCTION_DATA (decl) = f;
11014 /* Clear out the bits we don't need. */
11015 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
11016 f->bindings = NULL;
11017 f->x_local_names = NULL;
11021 /* Set the return value of the constructor (if present). */
11024 finish_constructor_body (void)
11029 if (targetm.cxx.cdtor_returns_this ())
11031 /* Any return from a constructor will end up here. */
11032 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11034 val = DECL_ARGUMENTS (current_function_decl);
11035 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11036 DECL_RESULT (current_function_decl), val);
11037 /* Return the address of the object. */
11038 exprstmt = build_stmt (RETURN_EXPR, val);
11039 add_stmt (exprstmt);
11043 /* Do all the processing for the beginning of a destructor; set up the
11044 vtable pointers and cleanups for bases and members. */
11047 begin_destructor_body (void)
11049 tree compound_stmt;
11051 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
11052 issued an error message. We still want to try to process the
11053 body of the function, but initialize_vtbl_ptrs will crash if
11054 TYPE_BINFO is NULL. */
11055 if (COMPLETE_TYPE_P (current_class_type))
11057 compound_stmt = begin_compound_stmt (0);
11058 /* Make all virtual function table pointers in non-virtual base
11059 classes point to CURRENT_CLASS_TYPE's virtual function
11061 initialize_vtbl_ptrs (current_class_ptr);
11062 finish_compound_stmt (compound_stmt);
11064 /* And insert cleanups for our bases and members so that they
11065 will be properly destroyed if we throw. */
11066 push_base_cleanups ();
11070 /* At the end of every destructor we generate code to delete the object if
11071 necessary. Do that now. */
11074 finish_destructor_body (void)
11078 /* Any return from a destructor will end up here; that way all base
11079 and member cleanups will be run when the function returns. */
11080 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
11082 /* In a virtual destructor, we must call delete. */
11083 if (DECL_VIRTUAL_P (current_function_decl))
11086 tree virtual_size = cxx_sizeof (current_class_type);
11090 At the point of definition of a virtual destructor (including
11091 an implicit definition), non-placement operator delete shall
11092 be looked up in the scope of the destructor's class and if
11093 found shall be accessible and unambiguous. */
11094 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
11096 /*global_p=*/false,
11097 /*placement=*/NULL_TREE,
11098 /*alloc_fn=*/NULL_TREE);
11100 if_stmt = begin_if_stmt ();
11101 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
11102 current_in_charge_parm,
11105 finish_expr_stmt (exprstmt);
11106 finish_then_clause (if_stmt);
11107 finish_if_stmt (if_stmt);
11110 if (targetm.cxx.cdtor_returns_this ())
11114 val = DECL_ARGUMENTS (current_function_decl);
11115 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
11116 DECL_RESULT (current_function_decl), val);
11117 /* Return the address of the object. */
11118 exprstmt = build_stmt (RETURN_EXPR, val);
11119 add_stmt (exprstmt);
11123 /* Do the necessary processing for the beginning of a function body, which
11124 in this case includes member-initializers, but not the catch clauses of
11125 a function-try-block. Currently, this means opening a binding level
11126 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
11129 begin_function_body (void)
11133 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11136 if (processing_template_decl)
11137 /* Do nothing now. */;
11139 /* Always keep the BLOCK node associated with the outermost pair of
11140 curly braces of a function. These are needed for correct
11141 operation of dwarfout.c. */
11142 keep_next_level (true);
11144 stmt = begin_compound_stmt (BCS_FN_BODY);
11146 if (processing_template_decl)
11147 /* Do nothing now. */;
11148 else if (DECL_DESTRUCTOR_P (current_function_decl))
11149 begin_destructor_body ();
11154 /* Do the processing for the end of a function body. Currently, this means
11155 closing out the cleanups for fully-constructed bases and members, and in
11156 the case of the destructor, deleting the object if desired. Again, this
11157 is only meaningful for [cd]tors, since they are the only functions where
11158 there is a significant distinction between the main body and any
11159 function catch clauses. Handling, say, main() return semantics here
11160 would be wrong, as flowing off the end of a function catch clause for
11161 main() would also need to return 0. */
11164 finish_function_body (tree compstmt)
11166 if (compstmt == NULL_TREE)
11169 /* Close the block. */
11170 finish_compound_stmt (compstmt);
11172 if (processing_template_decl)
11173 /* Do nothing now. */;
11174 else if (DECL_CONSTRUCTOR_P (current_function_decl))
11175 finish_constructor_body ();
11176 else if (DECL_DESTRUCTOR_P (current_function_decl))
11177 finish_destructor_body ();
11180 /* Given a function, returns the BLOCK corresponding to the outermost level
11181 of curly braces, skipping the artificial block created for constructor
11185 outer_curly_brace_block (tree fndecl)
11187 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
11188 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
11189 /* Skip the artificial function body block. */
11190 block = BLOCK_SUBBLOCKS (block);
11194 /* Finish up a function declaration and compile that function
11195 all the way to assembler language output. The free the storage
11196 for the function definition.
11198 FLAGS is a bitwise or of the following values:
11200 We just finished processing the body of an in-class inline
11201 function definition. (This processing will have taken place
11202 after the class definition is complete.) */
11205 finish_function (int flags)
11207 tree fndecl = current_function_decl;
11208 tree fntype, ctype = NULL_TREE;
11209 int inclass_inline = (flags & 2) != 0;
11212 /* When we get some parse errors, we can end up without a
11213 current_function_decl, so cope. */
11214 if (fndecl == NULL_TREE)
11215 return error_mark_node;
11217 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
11218 && DECL_VIRTUAL_P (fndecl)
11219 && !processing_template_decl)
11221 tree fnclass = DECL_CONTEXT (fndecl);
11222 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
11223 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
11226 nested = function_depth > 1;
11227 fntype = TREE_TYPE (fndecl);
11229 /* TREE_READONLY (fndecl) = 1;
11230 This caused &foo to be of type ptr-to-const-function
11231 which then got a warning when stored in a ptr-to-function variable. */
11233 gcc_assert (building_stmt_tree ());
11234 /* The current function is being defined, so its DECL_INITIAL should
11235 be set, and unless there's a multiple definition, it should be
11236 error_mark_node. */
11237 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
11239 /* For a cloned function, we've already got all the code we need;
11240 there's no need to add any extra bits. */
11241 if (!DECL_CLONED_FUNCTION_P (fndecl))
11243 if (DECL_MAIN_P (current_function_decl))
11247 /* Make it so that `main' always returns 0 by default (or
11250 stmt = finish_return_stmt (integer_one_node);
11252 stmt = finish_return_stmt (integer_zero_node);
11254 /* Hack. We don't want the middle-end to warn that this
11255 return is unreachable, so put the statement on the
11257 #ifdef USE_MAPPED_LOCATION
11258 SET_EXPR_LOCATION (stmt, UNKNOWN_LOCATION);
11260 annotate_with_file_line (stmt, input_filename, 0);
11264 if (use_eh_spec_block (current_function_decl))
11265 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
11266 (TREE_TYPE (current_function_decl)),
11267 current_eh_spec_block);
11270 /* If we're saving up tree structure, tie off the function now. */
11271 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
11273 finish_fname_decls ();
11275 /* If this function can't throw any exceptions, remember that. */
11276 if (!processing_template_decl
11277 && !cp_function_chain->can_throw
11278 && !flag_non_call_exceptions
11279 && !DECL_REPLACEABLE_P (fndecl))
11280 TREE_NOTHROW (fndecl) = 1;
11282 /* This must come after expand_function_end because cleanups might
11283 have declarations (from inline functions) that need to go into
11284 this function's blocks. */
11286 /* If the current binding level isn't the outermost binding level
11287 for this function, either there is a bug, or we have experienced
11288 syntax errors and the statement tree is malformed. */
11289 if (current_binding_level->kind != sk_function_parms)
11291 /* Make sure we have already experienced errors. */
11292 gcc_assert (errorcount);
11294 /* Throw away the broken statement tree and extra binding
11296 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
11298 while (current_binding_level->kind != sk_function_parms)
11300 if (current_binding_level->kind == sk_class)
11301 pop_nested_class ();
11303 poplevel (0, 0, 0);
11306 poplevel (1, 0, 1);
11308 /* Statements should always be full-expressions at the outermost set
11309 of curly braces for a function. */
11310 gcc_assert (stmts_are_full_exprs_p ());
11312 /* Set up the named return value optimization, if we can. Candidate
11313 variables are selected in check_return_expr. */
11314 if (current_function_return_value)
11316 tree r = current_function_return_value;
11319 if (r != error_mark_node
11320 /* This is only worth doing for fns that return in memory--and
11321 simpler, since we don't have to worry about promoted modes. */
11322 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
11323 /* Only allow this for variables declared in the outer scope of
11324 the function so we know that their lifetime always ends with a
11325 return; see g++.dg/opt/nrv6.C. We could be more flexible if
11326 we were to do this optimization in tree-ssa. */
11327 && (outer = outer_curly_brace_block (fndecl))
11328 && chain_member (r, BLOCK_VARS (outer)))
11329 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
11331 current_function_return_value = NULL_TREE;
11334 /* Remember that we were in class scope. */
11335 if (current_class_name)
11336 ctype = current_class_type;
11338 /* Must mark the RESULT_DECL as being in this function. */
11339 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
11341 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
11342 to the FUNCTION_DECL node itself. */
11343 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
11345 /* Save away current state, if appropriate. */
11346 if (!processing_template_decl)
11347 save_function_data (fndecl);
11349 /* Complain if there's just no return statement. */
11350 if (warn_return_type
11351 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
11352 && !dependent_type_p (TREE_TYPE (fntype))
11353 && !current_function_returns_value && !current_function_returns_null
11354 /* Don't complain if we abort or throw. */
11355 && !current_function_returns_abnormally
11356 && !DECL_NAME (DECL_RESULT (fndecl))
11357 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
11358 inline function, as we might never be compiled separately. */
11359 && (DECL_INLINE (fndecl) || processing_template_decl)
11360 /* Structor return values (if any) are set by the compiler. */
11361 && !DECL_CONSTRUCTOR_P (fndecl)
11362 && !DECL_DESTRUCTOR_P (fndecl))
11363 warning (OPT_Wreturn_type, "no return statement in function returning non-void");
11365 /* Store the end of the function, so that we get good line number
11366 info for the epilogue. */
11367 cfun->function_end_locus = input_location;
11369 /* Genericize before inlining. */
11370 if (!processing_template_decl)
11372 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
11373 cp_genericize (fndecl);
11374 /* Clear out the bits we don't need. */
11375 f->x_current_class_ptr = NULL;
11376 f->x_current_class_ref = NULL;
11377 f->x_eh_spec_block = NULL;
11378 f->x_in_charge_parm = NULL;
11379 f->x_vtt_parm = NULL;
11380 f->x_return_value = NULL;
11381 f->bindings = NULL;
11382 f->extern_decl_map = NULL;
11384 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
11385 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
11387 /* Clear out the bits we don't need. */
11388 local_names = NULL;
11390 /* We're leaving the context of this function, so zap cfun. It's still in
11391 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
11393 current_function_decl = NULL;
11395 /* If this is an in-class inline definition, we may have to pop the
11396 bindings for the template parameters that we added in
11397 maybe_begin_member_template_processing when start_function was
11399 if (inclass_inline)
11400 maybe_end_member_template_processing ();
11402 /* Leave the scope of the class. */
11404 pop_nested_class ();
11410 /* Let the error reporting routines know that we're outside a
11411 function. For a nested function, this value is used in
11412 cxx_pop_function_context and then reset via pop_function_context. */
11413 current_function_decl = NULL_TREE;
11418 /* Create the FUNCTION_DECL for a function definition.
11419 DECLSPECS and DECLARATOR are the parts of the declaration;
11420 they describe the return type and the name of the function,
11421 but twisted together in a fashion that parallels the syntax of C.
11423 This function creates a binding context for the function body
11424 as well as setting up the FUNCTION_DECL in current_function_decl.
11426 Returns a FUNCTION_DECL on success.
11428 If the DECLARATOR is not suitable for a function (it defines a datum
11429 instead), we return 0, which tells yyparse to report a parse error.
11431 May return void_type_node indicating that this method is actually
11432 a friend. See grokfield for more details.
11434 Came here with a `.pushlevel' .
11436 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
11437 CHANGES TO CODE IN `grokfield'. */
11440 start_method (cp_decl_specifier_seq *declspecs,
11441 const cp_declarator *declarator, tree attrlist)
11443 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
11446 if (fndecl == error_mark_node)
11447 return error_mark_node;
11449 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
11451 error ("invalid member function declaration");
11452 return error_mark_node;
11456 cplus_decl_attributes (&fndecl, attrlist, 0);
11458 /* Pass friends other than inline friend functions back. */
11459 if (fndecl == void_type_node)
11462 if (DECL_IN_AGGR_P (fndecl))
11464 if (DECL_CONTEXT (fndecl)
11465 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
11466 error ("%qD is already defined in class %qT", fndecl,
11467 DECL_CONTEXT (fndecl));
11468 return error_mark_node;
11471 check_template_shadow (fndecl);
11473 DECL_DECLARED_INLINE_P (fndecl) = 1;
11474 if (flag_default_inline)
11475 DECL_INLINE (fndecl) = 1;
11477 /* We process method specializations in finish_struct_1. */
11478 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
11480 fndecl = push_template_decl (fndecl);
11481 if (fndecl == error_mark_node)
11485 if (! DECL_FRIEND_P (fndecl))
11487 if (TREE_CHAIN (fndecl))
11489 fndecl = copy_node (fndecl);
11490 TREE_CHAIN (fndecl) = NULL_TREE;
11494 finish_decl (fndecl, NULL_TREE, NULL_TREE);
11496 /* Make a place for the parms. */
11497 begin_scope (sk_function_parms, fndecl);
11499 DECL_IN_AGGR_P (fndecl) = 1;
11503 /* Go through the motions of finishing a function definition.
11504 We don't compile this method until after the whole class has
11507 FINISH_METHOD must return something that looks as though it
11508 came from GROKFIELD (since we are defining a method, after all).
11510 This is called after parsing the body of the function definition.
11511 STMTS is the chain of statements that makes up the function body.
11513 DECL is the ..._DECL that `start_method' provided. */
11516 finish_method (tree decl)
11518 tree fndecl = decl;
11523 if (decl == void_type_node)
11526 old_initial = DECL_INITIAL (fndecl);
11528 /* Undo the level for the parms (from start_method).
11529 This is like poplevel, but it causes nothing to be
11530 saved. Saving information here confuses symbol-table
11531 output routines. Besides, this information will
11532 be correctly output when this method is actually
11535 /* Clear out the meanings of the local variables of this level;
11536 also record in each decl which block it belongs to. */
11538 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
11540 if (DECL_NAME (link) != NULL_TREE)
11541 pop_binding (DECL_NAME (link), link);
11542 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
11543 DECL_CONTEXT (link) = NULL_TREE;
11546 poplevel (0, 0, 0);
11548 DECL_INITIAL (fndecl) = old_initial;
11550 /* We used to check if the context of FNDECL was different from
11551 current_class_type as another way to get inside here. This didn't work
11552 for String.cc in libg++. */
11553 if (DECL_FRIEND_P (fndecl))
11555 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
11557 decl = void_type_node;
11564 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
11565 we can lay it out later, when and if its type becomes complete. */
11568 maybe_register_incomplete_var (tree var)
11570 gcc_assert (TREE_CODE (var) == VAR_DECL);
11572 /* Keep track of variables with incomplete types. */
11573 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
11574 && DECL_EXTERNAL (var))
11576 tree inner_type = TREE_TYPE (var);
11578 while (TREE_CODE (inner_type) == ARRAY_TYPE)
11579 inner_type = TREE_TYPE (inner_type);
11580 inner_type = TYPE_MAIN_VARIANT (inner_type);
11582 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
11583 /* RTTI TD entries are created while defining the type_info. */
11584 || (TYPE_LANG_SPECIFIC (inner_type)
11585 && TYPE_BEING_DEFINED (inner_type)))
11586 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
11590 /* Called when a class type (given by TYPE) is defined. If there are
11591 any existing VAR_DECLs whose type hsa been completed by this
11592 declaration, update them now. */
11595 complete_vars (tree type)
11597 tree *list = &incomplete_vars;
11599 gcc_assert (CLASS_TYPE_P (type));
11602 if (same_type_p (type, TREE_PURPOSE (*list)))
11604 tree var = TREE_VALUE (*list);
11605 tree type = TREE_TYPE (var);
11606 /* Complete the type of the variable. The VAR_DECL itself
11607 will be laid out in expand_expr. */
11608 complete_type (type);
11609 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
11610 /* Remove this entry from the list. */
11611 *list = TREE_CHAIN (*list);
11614 list = &TREE_CHAIN (*list);
11617 /* Check for pending declarations which may have abstract type. */
11618 complete_type_check_abstract (type);
11621 /* If DECL is of a type which needs a cleanup, build that cleanup
11625 cxx_maybe_build_cleanup (tree decl)
11627 tree type = TREE_TYPE (decl);
11629 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
11631 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
11633 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
11634 && CLASSTYPE_VBASECLASSES (type));
11636 if (TREE_CODE (type) == ARRAY_TYPE)
11640 cxx_mark_addressable (decl);
11641 rval = build_unary_op (ADDR_EXPR, decl, 0);
11644 /* Optimize for space over speed here. */
11645 if (!has_vbases || flag_expensive_optimizations)
11646 flags |= LOOKUP_NONVIRTUAL;
11648 rval = build_delete (TREE_TYPE (rval), rval,
11649 sfk_complete_destructor, flags, 0);
11656 /* When a stmt has been parsed, this function is called. */
11663 /* DECL was originally constructed as a non-static member function,
11664 but turned out to be static. Update it accordingly. */
11667 revert_static_member_fn (tree decl)
11670 tree function = TREE_TYPE (decl);
11671 tree args = TYPE_ARG_TYPES (function);
11673 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
11674 != TYPE_UNQUALIFIED)
11675 error ("static member function %q#D declared with type qualifiers", decl);
11677 args = TREE_CHAIN (args);
11678 tmp = build_function_type (TREE_TYPE (function), args);
11679 tmp = build_qualified_type (tmp, cp_type_quals (function));
11680 tmp = build_exception_variant (tmp,
11681 TYPE_RAISES_EXCEPTIONS (function));
11682 TREE_TYPE (decl) = tmp;
11683 if (DECL_ARGUMENTS (decl))
11684 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
11685 DECL_STATIC_FUNCTION_P (decl) = 1;
11688 /* Initialize the variables used during compilation of a C++
11692 cxx_push_function_context (struct function * f)
11694 struct language_function *p = GGC_CNEW (struct language_function);
11697 /* Whenever we start a new function, we destroy temporaries in the
11699 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11705 if (DECL_SAVED_FUNCTION_DATA (fn))
11707 /* If we already parsed this function, and we're just expanding it
11708 now, restore saved state. */
11709 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
11711 /* We don't need the saved data anymore. Unless this is an inline
11712 function; we need the named return value info for
11713 declare_return_variable. */
11714 if (! DECL_INLINE (fn))
11715 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
11720 /* Free the language-specific parts of F, now that we've finished
11721 compiling the function. */
11724 cxx_pop_function_context (struct function * f)
11729 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
11730 one of the language-independent trees. */
11732 enum cp_tree_node_structure_enum
11733 cp_tree_node_structure (union lang_tree_node * t)
11735 switch (TREE_CODE (&t->generic))
11737 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
11738 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
11739 case OVERLOAD: return TS_CP_OVERLOAD;
11740 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
11741 case TINST_LEVEL: return TS_CP_TINST_LEVEL;
11742 case PTRMEM_CST: return TS_CP_PTRMEM;
11743 case BASELINK: return TS_CP_BASELINK;
11744 default: return TS_CP_GENERIC;
11748 /* Build the void_list_node (void_type_node having been created). */
11750 build_void_list_node (void)
11752 tree t = build_tree_list (NULL_TREE, void_type_node);
11757 cp_missing_noreturn_ok_p (tree decl)
11759 /* A missing noreturn is ok for the `main' function. */
11760 return DECL_MAIN_P (decl);
11763 /* Return the COMDAT group into which DECL should be placed. */
11766 cxx_comdat_group (tree decl)
11770 /* Virtual tables, construction virtual tables, and virtual table
11771 tables all go in a single COMDAT group, named after the primary
11773 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
11774 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
11775 /* For all other DECLs, the COMDAT group is the mangled name of the
11776 declaration itself. */
11779 while (DECL_THUNK_P (decl))
11781 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
11782 into the same section as the target function. In that case
11783 we must return target's name. */
11784 tree target = THUNK_TARGET (decl);
11785 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
11786 && DECL_SECTION_NAME (target) != NULL
11787 && DECL_ONE_ONLY (target))
11792 name = DECL_ASSEMBLER_NAME (decl);
11795 return IDENTIFIER_POINTER (name);
11798 #include "gt-cp-decl.h"