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, 2007, 2008, 2009
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
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"
54 #include "tree-flow.h"
55 #include "pointer-set.h"
57 static tree grokparms (tree parmlist, tree *);
58 static const char *redeclaration_error_message (tree, tree);
60 static int decl_jump_unsafe (tree);
61 static void require_complete_types_for_parms (tree);
62 static int ambi_op_p (enum tree_code);
63 static int unary_op_p (enum tree_code);
64 static void push_local_name (tree);
65 static tree grok_reference_init (tree, tree, tree, tree *);
66 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
68 static void record_unknown_type (tree, const char *);
69 static tree builtin_function_1 (tree, tree, bool);
70 static tree build_library_fn_1 (tree, enum tree_code, tree);
71 static int member_function_or_else (tree, tree, enum overload_flags);
72 static void bad_specifiers (tree, const char *, int, int, int, int,
74 static void check_for_uninitialized_const_var (tree);
75 static hashval_t typename_hash (const void *);
76 static int typename_compare (const void *, const void *);
77 static tree local_variable_p_walkfn (tree *, int *, void *);
78 static tree record_builtin_java_type (const char *, int);
79 static const char *tag_name (enum tag_types);
80 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
81 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
82 static void maybe_deduce_size_from_array_init (tree, tree);
83 static void layout_var_decl (tree);
84 static tree check_initializer (tree, tree, int, tree *);
85 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
86 static void save_function_data (tree);
87 static void check_function_type (tree, tree);
88 static void finish_constructor_body (void);
89 static void begin_destructor_body (void);
90 static void finish_destructor_body (void);
91 static tree create_array_type_for_decl (tree, tree, tree);
92 static tree get_atexit_node (void);
93 static tree get_dso_handle_node (void);
94 static tree start_cleanup_fn (void);
95 static void end_cleanup_fn (void);
96 static tree cp_make_fname_decl (tree, int);
97 static void initialize_predefined_identifiers (void);
98 static tree check_special_function_return_type
99 (special_function_kind, tree, tree);
100 static tree push_cp_library_fn (enum tree_code, tree);
101 static tree build_cp_library_fn (tree, enum tree_code, tree);
102 static void store_parm_decls (tree);
103 static void initialize_local_var (tree, tree);
104 static void expand_static_init (tree, tree);
105 static tree next_initializable_field (tree);
107 /* The following symbols are subsumed in the cp_global_trees array, and
108 listed here individually for documentation purposes.
111 tree wchar_decl_node;
113 tree vtable_entry_type;
114 tree delta_type_node;
115 tree __t_desc_type_node;
117 tree class_type_node;
118 tree unknown_type_node;
120 Array type `vtable_entry_type[]'
123 tree vtbl_ptr_type_node;
130 A FUNCTION_DECL which can call `abort'. Not necessarily the
131 one that the user will declare, but sufficient to be called
132 by routines that want to abort the program.
136 The FUNCTION_DECL for the default `::operator delete'.
138 tree global_delete_fndecl;
141 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
142 tree tinfo_var_id; */
144 tree cp_global_trees[CPTI_MAX];
146 /* Indicates that there is a type value in some namespace, although
147 that is not necessarily in scope at the moment. */
149 tree global_type_node;
151 /* The node that holds the "name" of the global scope. */
152 tree global_scope_name;
154 #define local_names cp_function_chain->x_local_names
156 /* A list of objects which have constructors or destructors
157 which reside in the global scope. The decl is stored in
158 the TREE_VALUE slot and the initializer is stored
159 in the TREE_PURPOSE slot. */
160 tree static_aggregates;
164 /* A node for the integer constants 2, and 3. */
166 tree integer_two_node, integer_three_node;
168 /* Used only for jumps to as-yet undefined labels, since jumps to
169 defined labels can have their validity checked immediately. */
171 struct named_label_use_entry GTY(())
173 struct named_label_use_entry *next;
174 /* The binding level to which this entry is *currently* attached.
175 This is initially the binding level in which the goto appeared,
176 but is modified as scopes are closed. */
177 struct cp_binding_level *binding_level;
178 /* The head of the names list that was current when the goto appeared,
179 or the inner scope popped. These are the decls that will *not* be
180 skipped when jumping to the label. */
182 /* The location of the goto, for error reporting. */
183 location_t o_goto_locus;
184 /* True if an OpenMP structured block scope has been closed since
185 the goto appeared. This means that the branch from the label will
186 illegally exit an OpenMP scope. */
190 /* A list of all LABEL_DECLs in the function that have names. Here so
191 we can clear out their names' definitions at the end of the
192 function, and so we can check the validity of jumps to these labels. */
194 struct named_label_entry GTY(())
196 /* The decl itself. */
199 /* The binding level to which the label is *currently* attached.
200 This is initially set to the binding level in which the label
201 is defined, but is modified as scopes are closed. */
202 struct cp_binding_level *binding_level;
203 /* The head of the names list that was current when the label was
204 defined, or the inner scope popped. These are the decls that will
205 be skipped when jumping to the label. */
207 /* A tree list of all decls from all binding levels that would be
208 crossed by a backward branch to the label. */
211 /* A list of uses of the label, before the label is defined. */
212 struct named_label_use_entry *uses;
214 /* The following bits are set after the label is defined, and are
215 updated as scopes are popped. They indicate that a backward jump
216 to the label will illegally enter a scope of the given flavor. */
222 #define named_labels cp_function_chain->x_named_labels
224 /* The number of function bodies which we are currently processing.
225 (Zero if we are at namespace scope, one inside the body of a
226 function, two inside the body of a function in a local class, etc.) */
229 /* To avoid unwanted recursion, finish_function defers all mark_used calls
230 encountered during its execution until it finishes. */
231 bool defer_mark_used_calls;
232 VEC(tree, gc) *deferred_mark_used_calls;
234 /* States indicating how grokdeclarator() should handle declspecs marked
235 with __attribute__((deprecated)). An object declared as
236 __attribute__((deprecated)) suppresses warnings of uses of other
238 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
241 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
242 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
243 time the VAR_DECL was declared, the type was incomplete. */
245 static GTY(()) tree incomplete_vars;
247 /* Returns the kind of template specialization we are currently
248 processing, given that it's declaration contained N_CLASS_SCOPES
249 explicit scope qualifications. */
252 current_tmpl_spec_kind (int n_class_scopes)
254 int n_template_parm_scopes = 0;
255 int seen_specialization_p = 0;
256 int innermost_specialization_p = 0;
257 struct cp_binding_level *b;
259 /* Scan through the template parameter scopes. */
260 for (b = current_binding_level;
261 b->kind == sk_template_parms;
264 /* If we see a specialization scope inside a parameter scope,
265 then something is wrong. That corresponds to a declaration
268 template <class T> template <> ...
270 which is always invalid since [temp.expl.spec] forbids the
271 specialization of a class member template if the enclosing
272 class templates are not explicitly specialized as well. */
273 if (b->explicit_spec_p)
275 if (n_template_parm_scopes == 0)
276 innermost_specialization_p = 1;
278 seen_specialization_p = 1;
280 else if (seen_specialization_p == 1)
281 return tsk_invalid_member_spec;
283 ++n_template_parm_scopes;
286 /* Handle explicit instantiations. */
287 if (processing_explicit_instantiation)
289 if (n_template_parm_scopes != 0)
290 /* We've seen a template parameter list during an explicit
291 instantiation. For example:
293 template <class T> template void f(int);
295 This is erroneous. */
296 return tsk_invalid_expl_inst;
298 return tsk_expl_inst;
301 if (n_template_parm_scopes < n_class_scopes)
302 /* We've not seen enough template headers to match all the
303 specialized classes present. For example:
305 template <class T> void R<T>::S<T>::f(int);
307 This is invalid; there needs to be one set of template
308 parameters for each class. */
309 return tsk_insufficient_parms;
310 else if (n_template_parm_scopes == n_class_scopes)
311 /* We're processing a non-template declaration (even though it may
312 be a member of a template class.) For example:
314 template <class T> void S<T>::f(int);
316 The `class T' matches the `S<T>', leaving no template headers
317 corresponding to the `f'. */
319 else if (n_template_parm_scopes > n_class_scopes + 1)
320 /* We've got too many template headers. For example:
322 template <> template <class T> void f (T);
324 There need to be more enclosing classes. */
325 return tsk_excessive_parms;
327 /* This must be a template. It's of the form:
329 template <class T> template <class U> void S<T>::f(U);
331 This is a specialization if the innermost level was a
332 specialization; otherwise it's just a definition of the
334 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
337 /* Exit the current scope. */
345 /* When a label goes out of scope, check to see if that label was used
346 in a valid manner, and issue any appropriate warnings or errors. */
349 pop_label (tree label, tree old_value)
351 if (!processing_template_decl)
353 if (DECL_INITIAL (label) == NULL_TREE)
357 error ("label %q+D used but not defined", label);
358 location = input_location; /* FIXME want (input_filename, (line)0) */
359 /* Avoid crashing later. */
360 define_label (location, DECL_NAME (label));
363 warn_for_unused_label (label);
366 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
369 /* At the end of a function, all labels declared within the function
370 go out of scope. BLOCK is the top-level block for the
374 pop_labels_1 (void **slot, void *data)
376 struct named_label_entry *ent = (struct named_label_entry *) *slot;
377 tree block = (tree) data;
379 pop_label (ent->label_decl, NULL_TREE);
381 /* Put the labels into the "variables" of the top-level block,
382 so debugger can see them. */
383 TREE_CHAIN (ent->label_decl) = BLOCK_VARS (block);
384 BLOCK_VARS (block) = ent->label_decl;
386 htab_clear_slot (named_labels, slot);
392 pop_labels (tree block)
396 htab_traverse (named_labels, pop_labels_1, block);
401 /* At the end of a block with local labels, restore the outer definition. */
404 pop_local_label (tree label, tree old_value)
406 struct named_label_entry dummy;
409 pop_label (label, old_value);
411 dummy.label_decl = label;
412 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
413 htab_clear_slot (named_labels, slot);
416 /* The following two routines are used to interface to Objective-C++.
417 The binding level is purposely treated as an opaque type. */
420 objc_get_current_scope (void)
422 return current_binding_level;
425 /* The following routine is used by the NeXT-style SJLJ exceptions;
426 variables get marked 'volatile' so as to not be clobbered by
427 _setjmp()/_longjmp() calls. All variables in the current scope,
428 as well as parent scopes up to (but not including) ENCLOSING_BLK
429 shall be thusly marked. */
432 objc_mark_locals_volatile (void *enclosing_blk)
434 struct cp_binding_level *scope;
436 for (scope = current_binding_level;
437 scope && scope != enclosing_blk;
438 scope = scope->level_chain)
442 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
443 objc_volatilize_decl (decl);
445 /* Do not climb up past the current function. */
446 if (scope->kind == sk_function_parms)
451 /* Update data for defined and undefined labels when leaving a scope. */
454 poplevel_named_label_1 (void **slot, void *data)
456 struct named_label_entry *ent = (struct named_label_entry *) *slot;
457 struct cp_binding_level *bl = (struct cp_binding_level *) data;
458 struct cp_binding_level *obl = bl->level_chain;
460 if (ent->binding_level == bl)
464 for (decl = ent->names_in_scope; decl; decl = TREE_CHAIN (decl))
465 if (decl_jump_unsafe (decl))
466 ent->bad_decls = tree_cons (NULL, decl, ent->bad_decls);
468 ent->binding_level = obl;
469 ent->names_in_scope = obl->names;
473 ent->in_try_scope = true;
476 ent->in_catch_scope = true;
479 ent->in_omp_scope = true;
487 struct named_label_use_entry *use;
489 for (use = ent->uses; use ; use = use->next)
490 if (use->binding_level == bl)
492 use->binding_level = obl;
493 use->names_in_scope = obl->names;
494 if (bl->kind == sk_omp)
495 use->in_omp_scope = true;
502 /* Exit a binding level.
503 Pop the level off, and restore the state of the identifier-decl mappings
504 that were in effect when this level was entered.
506 If KEEP == 1, this level had explicit declarations, so
507 and create a "block" (a BLOCK node) for the level
508 to record its declarations and subblocks for symbol table output.
510 If FUNCTIONBODY is nonzero, this level is the body of a function,
511 so create a block as if KEEP were set and also clear out all
514 If REVERSE is nonzero, reverse the order of decls before putting
515 them into the BLOCK. */
518 poplevel (int keep, int reverse, int functionbody)
521 /* The chain of decls was accumulated in reverse order.
522 Put it into forward order, just for cleanliness. */
524 int tmp = functionbody;
525 int real_functionbody;
529 int leaving_for_scope;
532 timevar_push (TV_NAME_LOOKUP);
537 gcc_assert (current_binding_level->kind != sk_class);
539 real_functionbody = (current_binding_level->kind == sk_cleanup
540 ? ((functionbody = 0), tmp) : functionbody);
541 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
543 gcc_assert (!VEC_length(cp_class_binding,
544 current_binding_level->class_shadowed));
546 /* We used to use KEEP == 2 to indicate that the new block should go
547 at the beginning of the list of blocks at this binding level,
548 rather than the end. This hack is no longer used. */
549 gcc_assert (keep == 0 || keep == 1);
551 if (current_binding_level->keep)
554 /* Any uses of undefined labels, and any defined labels, now operate
555 under constraints of next binding contour. */
556 if (cfun && !functionbody && named_labels)
557 htab_traverse (named_labels, poplevel_named_label_1,
558 current_binding_level);
560 /* Get the decls in the order they were written.
561 Usually current_binding_level->names is in reverse order.
562 But parameter decls were previously put in forward order. */
565 current_binding_level->names
566 = decls = nreverse (current_binding_level->names);
568 decls = current_binding_level->names;
570 /* If there were any declarations or structure tags in that level,
571 or if this level is a function body,
572 create a BLOCK to record them for the life of this function. */
574 if (keep == 1 || functionbody)
575 block = make_node (BLOCK);
576 if (block != NULL_TREE)
578 BLOCK_VARS (block) = decls;
579 BLOCK_SUBBLOCKS (block) = subblocks;
582 /* In each subblock, record that this is its superior. */
584 for (link = subblocks; link; link = BLOCK_CHAIN (link))
585 BLOCK_SUPERCONTEXT (link) = block;
587 /* We still support the old for-scope rules, whereby the variables
588 in a for-init statement were in scope after the for-statement
589 ended. We only use the new rules if flag_new_for_scope is
592 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
594 /* Before we remove the declarations first check for unused variables. */
595 if (warn_unused_variable
596 && !processing_template_decl)
597 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
598 if (TREE_CODE (decl) == VAR_DECL
599 && ! TREE_USED (decl)
600 && ! DECL_IN_SYSTEM_HEADER (decl)
601 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
602 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
604 /* Remove declarations for all the DECLs in this level. */
605 for (link = decls; link; link = TREE_CHAIN (link))
607 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
610 tree name = DECL_NAME (link);
614 ob = outer_binding (name,
615 IDENTIFIER_BINDING (name),
618 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
620 ns_binding = NULL_TREE;
622 if (ob && ob->scope == current_binding_level->level_chain)
623 /* We have something like:
628 and we are leaving the `for' scope. There's no reason to
629 keep the binding of the inner `i' in this case. */
630 pop_binding (name, link);
631 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
632 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
633 /* Here, we have something like:
641 We must pop the for-scope binding so we know what's a
642 type and what isn't. */
643 pop_binding (name, link);
646 /* Mark this VAR_DECL as dead so that we can tell we left it
647 there only for backward compatibility. */
648 DECL_DEAD_FOR_LOCAL (link) = 1;
650 /* Keep track of what should have happened when we
651 popped the binding. */
654 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
655 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
658 /* Add it to the list of dead variables in the next
659 outermost binding to that we can remove these when we
660 leave that binding. */
661 current_binding_level->level_chain->dead_vars_from_for
662 = tree_cons (NULL_TREE, link,
663 current_binding_level->level_chain->
666 /* Although we don't pop the cxx_binding, we do clear
667 its SCOPE since the scope is going away now. */
668 IDENTIFIER_BINDING (name)->scope
669 = current_binding_level->level_chain;
676 /* Remove the binding. */
679 if (TREE_CODE (decl) == TREE_LIST)
680 decl = TREE_VALUE (decl);
683 if (TREE_CODE (name) == OVERLOAD)
684 name = OVL_FUNCTION (name);
686 gcc_assert (DECL_P (name));
687 pop_binding (DECL_NAME (name), decl);
691 /* Remove declarations for any `for' variables from inner scopes
692 that we kept around. */
693 for (link = current_binding_level->dead_vars_from_for;
694 link; link = TREE_CHAIN (link))
695 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
697 /* Restore the IDENTIFIER_TYPE_VALUEs. */
698 for (link = current_binding_level->type_shadowed;
699 link; link = TREE_CHAIN (link))
700 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
702 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
703 for (link = current_binding_level->shadowed_labels;
705 link = TREE_CHAIN (link))
706 pop_local_label (TREE_VALUE (link), TREE_PURPOSE (link));
708 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
709 list if a `using' declaration put them there. The debugging
710 back ends won't understand OVERLOAD, so we remove them here.
711 Because the BLOCK_VARS are (temporarily) shared with
712 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
713 popped all the bindings. */
718 for (d = &BLOCK_VARS (block); *d; )
720 if (TREE_CODE (*d) == TREE_LIST)
721 *d = TREE_CHAIN (*d);
723 d = &TREE_CHAIN (*d);
727 /* If the level being exited is the top level of a function,
728 check over all the labels. */
731 /* Since this is the top level block of a function, the vars are
732 the function's parameters. Don't leave them in the BLOCK
733 because they are found in the FUNCTION_DECL instead. */
734 BLOCK_VARS (block) = 0;
738 kind = current_binding_level->kind;
739 if (kind == sk_cleanup)
743 /* If this is a temporary binding created for a cleanup, then we'll
744 have pushed a statement list level. Pop that, create a new
745 BIND_EXPR for the block, and insert it into the stream. */
746 stmt = pop_stmt_list (current_binding_level->statement_list);
747 stmt = c_build_bind_expr (block, stmt);
754 /* The current function is being defined, so its DECL_INITIAL
755 should be error_mark_node. */
756 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
757 DECL_INITIAL (current_function_decl) = block;
760 current_binding_level->blocks
761 = chainon (current_binding_level->blocks, block);
763 /* If we did not make a block for the level just exited,
764 any blocks made for inner levels
765 (since they cannot be recorded as subblocks in that level)
766 must be carried forward so they will later become subblocks
767 of something else. */
769 current_binding_level->blocks
770 = chainon (current_binding_level->blocks, subblocks);
772 /* Each and every BLOCK node created here in `poplevel' is important
773 (e.g. for proper debugging information) so if we created one
774 earlier, mark it as "used". */
776 TREE_USED (block) = 1;
778 /* All temporary bindings created for cleanups are popped silently. */
779 if (kind == sk_cleanup)
782 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
785 /* Insert BLOCK at the end of the list of subblocks of the
786 current binding level. This is used when a BIND_EXPR is expanded,
787 to handle the BLOCK node inside the BIND_EXPR. */
790 insert_block (tree block)
792 TREE_USED (block) = 1;
793 current_binding_level->blocks
794 = chainon (current_binding_level->blocks, block);
797 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
798 itself, calling F for each. The DATA is passed to F as well. */
801 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
804 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
806 result |= (*f) (name_space, data);
808 for (; current; current = TREE_CHAIN (current))
809 result |= walk_namespaces_r (current, f, data);
814 /* Walk all the namespaces, calling F for each. The DATA is passed to
818 walk_namespaces (walk_namespaces_fn f, void* data)
820 return walk_namespaces_r (global_namespace, f, data);
823 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
824 DATA is non-NULL, this is the last time we will call
825 wrapup_global_declarations for this NAMESPACE. */
828 wrapup_globals_for_namespace (tree name_space, void* data)
830 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
831 VEC(tree,gc) *statics = level->static_decls;
832 tree *vec = VEC_address (tree, statics);
833 int len = VEC_length (tree, statics);
834 int last_time = (data != 0);
838 check_global_declarations (vec, len);
839 emit_debug_global_declarations (vec, len);
843 /* Write out any globals that need to be output. */
844 return wrapup_global_declarations (vec, len);
848 /* In C++, you don't have to write `struct S' to refer to `S'; you
849 can just use `S'. We accomplish this by creating a TYPE_DECL as
850 if the user had written `typedef struct S S'. Create and return
851 the TYPE_DECL for TYPE. */
854 create_implicit_typedef (tree name, tree type)
858 decl = build_decl (TYPE_DECL, name, type);
859 DECL_ARTIFICIAL (decl) = 1;
860 /* There are other implicit type declarations, like the one *within*
861 a class that allows you to write `S::S'. We must distinguish
863 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
864 TYPE_NAME (type) = decl;
869 /* Remember a local name for name-mangling purposes. */
872 push_local_name (tree decl)
877 timevar_push (TV_NAME_LOOKUP);
879 name = DECL_NAME (decl);
881 nelts = VEC_length (tree, local_names);
882 for (i = 0; i < nelts; i++)
884 t = VEC_index (tree, local_names, i);
885 if (DECL_NAME (t) == name)
887 if (!DECL_LANG_SPECIFIC (decl))
888 retrofit_lang_decl (decl);
889 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
890 if (DECL_LANG_SPECIFIC (t))
891 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
893 DECL_DISCRIMINATOR (decl) = 1;
895 VEC_replace (tree, local_names, i, decl);
896 timevar_pop (TV_NAME_LOOKUP);
901 VEC_safe_push (tree, gc, local_names, decl);
902 timevar_pop (TV_NAME_LOOKUP);
905 /* Subroutine of duplicate_decls: return truthvalue of whether
906 or not types of these decls match.
908 For C++, we must compare the parameter list so that `int' can match
909 `int&' in a parameter position, but `int&' is not confused with
913 decls_match (tree newdecl, tree olddecl)
917 if (newdecl == olddecl)
920 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
921 /* If the two DECLs are not even the same kind of thing, we're not
922 interested in their types. */
925 if (TREE_CODE (newdecl) == FUNCTION_DECL)
927 tree f1 = TREE_TYPE (newdecl);
928 tree f2 = TREE_TYPE (olddecl);
929 tree p1 = TYPE_ARG_TYPES (f1);
930 tree p2 = TYPE_ARG_TYPES (f2);
932 /* Specializations of different templates are different functions
933 even if they have the same type. */
934 tree t1 = (DECL_USE_TEMPLATE (newdecl)
935 ? DECL_TI_TEMPLATE (newdecl)
937 tree t2 = (DECL_USE_TEMPLATE (olddecl)
938 ? DECL_TI_TEMPLATE (olddecl)
943 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
944 && ! (DECL_EXTERN_C_P (newdecl)
945 && DECL_EXTERN_C_P (olddecl)))
948 if (TREE_CODE (f1) != TREE_CODE (f2))
951 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
953 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
954 && (DECL_BUILT_IN (olddecl)
955 #ifndef NO_IMPLICIT_EXTERN_C
956 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
957 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
961 types_match = self_promoting_args_p (p1);
962 if (p1 == void_list_node)
963 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
965 #ifndef NO_IMPLICIT_EXTERN_C
966 else if (p1 == NULL_TREE
967 && (DECL_EXTERN_C_P (olddecl)
968 && DECL_IN_SYSTEM_HEADER (olddecl)
969 && !DECL_CLASS_SCOPE_P (olddecl))
970 && (DECL_EXTERN_C_P (newdecl)
971 && DECL_IN_SYSTEM_HEADER (newdecl)
972 && !DECL_CLASS_SCOPE_P (newdecl)))
974 types_match = self_promoting_args_p (p2);
975 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
979 types_match = compparms (p1, p2);
984 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
986 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
987 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
990 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
991 DECL_TEMPLATE_PARMS (olddecl)))
994 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
995 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
996 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
998 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
999 DECL_TEMPLATE_RESULT (newdecl));
1003 /* Need to check scope for variable declaration (VAR_DECL).
1004 For typedef (TYPE_DECL), scope is ignored. */
1005 if (TREE_CODE (newdecl) == VAR_DECL
1006 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1008 Two declarations for an object with C language linkage
1009 with the same name (ignoring the namespace that qualify
1010 it) that appear in different namespace scopes refer to
1012 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1015 if (TREE_TYPE (newdecl) == error_mark_node)
1016 types_match = TREE_TYPE (olddecl) == error_mark_node;
1017 else if (TREE_TYPE (olddecl) == NULL_TREE)
1018 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1019 else if (TREE_TYPE (newdecl) == NULL_TREE)
1022 types_match = comptypes (TREE_TYPE (newdecl),
1023 TREE_TYPE (olddecl),
1024 COMPARE_REDECLARATION);
1030 /* If NEWDECL is `static' and an `extern' was seen previously,
1031 warn about it. OLDDECL is the previous declaration.
1033 Note that this does not apply to the C++ case of declaring
1034 a variable `extern const' and then later `const'.
1036 Don't complain about built-in functions, since they are beyond
1037 the user's control. */
1040 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1044 if (TREE_CODE (newdecl) == TYPE_DECL
1045 || TREE_CODE (newdecl) == TEMPLATE_DECL
1046 || TREE_CODE (newdecl) == CONST_DECL
1047 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1050 /* Don't get confused by static member functions; that's a different
1052 if (TREE_CODE (newdecl) == FUNCTION_DECL
1053 && DECL_STATIC_FUNCTION_P (newdecl))
1056 /* If the old declaration was `static', or the new one isn't, then
1057 then everything is OK. */
1058 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1061 /* It's OK to declare a builtin function as `static'. */
1062 if (TREE_CODE (olddecl) == FUNCTION_DECL
1063 && DECL_ARTIFICIAL (olddecl))
1066 name = DECL_ASSEMBLER_NAME (newdecl);
1067 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1068 permerror (input_location, "previous declaration of %q+D", olddecl);
1071 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1072 function templates. If their exception specifications do not
1073 match, issue a diagnostic. */
1076 check_redeclaration_exception_specification (tree new_decl,
1081 tree new_exceptions;
1082 tree old_exceptions;
1084 new_type = TREE_TYPE (new_decl);
1085 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1086 old_type = TREE_TYPE (old_decl);
1087 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1091 If any declaration of a function has an exception-specification,
1092 all declarations, including the definition and an explicit
1093 specialization, of that function shall have an
1094 exception-specification with the same set of type-ids. */
1095 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1096 && ! DECL_IS_BUILTIN (old_decl)
1098 && !comp_except_specs (new_exceptions, old_exceptions,
1101 error ("declaration of %qF throws different exceptions", new_decl);
1102 error ("from previous declaration %q+F", old_decl);
1106 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1107 && lookup_attribute ("gnu_inline", \
1108 DECL_ATTRIBUTES (fn)))
1110 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1111 If the redeclaration is invalid, a diagnostic is issued, and the
1112 error_mark_node is returned. Otherwise, OLDDECL is returned.
1114 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1117 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1120 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1122 unsigned olddecl_uid = DECL_UID (olddecl);
1123 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1124 int new_defines_function = 0;
1127 if (newdecl == olddecl)
1130 types_match = decls_match (newdecl, olddecl);
1132 /* If either the type of the new decl or the type of the old decl is an
1133 error_mark_node, then that implies that we have already issued an
1134 error (earlier) for some bogus type specification, and in that case,
1135 it is rather pointless to harass the user with yet more error message
1136 about the same declaration, so just pretend the types match here. */
1137 if (TREE_TYPE (newdecl) == error_mark_node
1138 || TREE_TYPE (olddecl) == error_mark_node)
1139 return error_mark_node;
1141 if (DECL_P (olddecl)
1142 && TREE_CODE (newdecl) == FUNCTION_DECL
1143 && TREE_CODE (olddecl) == FUNCTION_DECL
1144 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1146 if (DECL_DECLARED_INLINE_P (newdecl)
1147 && DECL_UNINLINABLE (newdecl)
1148 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1149 /* Already warned elsewhere. */;
1150 else if (DECL_DECLARED_INLINE_P (olddecl)
1151 && DECL_UNINLINABLE (olddecl)
1152 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1153 /* Already warned. */;
1154 else if (DECL_DECLARED_INLINE_P (newdecl)
1155 && DECL_UNINLINABLE (olddecl)
1156 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1158 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1160 warning (OPT_Wattributes, "previous declaration of %q+D "
1161 "with attribute noinline", olddecl);
1163 else if (DECL_DECLARED_INLINE_P (olddecl)
1164 && DECL_UNINLINABLE (newdecl)
1165 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1167 warning (OPT_Wattributes, "function %q+D redeclared with "
1168 "attribute noinline", newdecl);
1169 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1174 /* Check for redeclaration and other discrepancies. */
1175 if (TREE_CODE (olddecl) == FUNCTION_DECL
1176 && DECL_ARTIFICIAL (olddecl))
1178 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1179 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1181 /* Avoid warnings redeclaring built-ins which have not been
1182 explicitly declared. */
1183 if (DECL_ANTICIPATED (olddecl))
1186 /* If you declare a built-in or predefined function name as static,
1187 the old definition is overridden, but optionally warn this was a
1188 bad choice of name. */
1189 if (! TREE_PUBLIC (newdecl))
1191 warning (OPT_Wshadow, "shadowing %s function %q#D",
1192 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1194 /* Discard the old built-in function. */
1197 /* If the built-in is not ansi, then programs can override
1198 it even globally without an error. */
1199 else if (! DECL_BUILT_IN (olddecl))
1200 warning (0, "library function %q#D redeclared as non-function %q#D",
1204 error ("declaration of %q#D", newdecl);
1205 error ("conflicts with built-in declaration %q#D",
1210 else if (!types_match)
1212 /* Avoid warnings redeclaring built-ins which have not been
1213 explicitly declared. */
1214 if (DECL_ANTICIPATED (olddecl))
1216 /* Deal with fileptr_type_node. FILE type is not known
1217 at the time we create the builtins. */
1220 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1221 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1223 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1226 else if (TREE_VALUE (t2) == fileptr_type_node)
1228 tree t = TREE_VALUE (t1);
1230 if (TREE_CODE (t) == POINTER_TYPE
1231 && TYPE_NAME (TREE_TYPE (t))
1232 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1233 == get_identifier ("FILE")
1234 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1236 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1238 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1239 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1240 types_match = decls_match (newdecl, olddecl);
1242 return duplicate_decls (newdecl, olddecl,
1244 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1247 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1250 else if ((DECL_EXTERN_C_P (newdecl)
1251 && DECL_EXTERN_C_P (olddecl))
1252 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1253 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1255 /* A near match; override the builtin. */
1257 if (TREE_PUBLIC (newdecl))
1259 warning (0, "new declaration %q#D", newdecl);
1260 warning (0, "ambiguates built-in declaration %q#D",
1264 warning (OPT_Wshadow, "shadowing %s function %q#D",
1265 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1269 /* Discard the old built-in function. */
1272 /* Replace the old RTL to avoid problems with inlining. */
1273 COPY_DECL_RTL (newdecl, olddecl);
1275 /* Even if the types match, prefer the new declarations type for
1276 built-ins which have not been explicitly declared, for
1277 exception lists, etc... */
1278 else if (DECL_ANTICIPATED (olddecl))
1280 tree type = TREE_TYPE (newdecl);
1281 tree attribs = (*targetm.merge_type_attributes)
1282 (TREE_TYPE (olddecl), type);
1284 type = cp_build_type_attribute_variant (type, attribs);
1285 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1288 /* If a function is explicitly declared "throw ()", propagate that to
1289 the corresponding builtin. */
1290 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1291 && DECL_ANTICIPATED (olddecl)
1292 && TREE_NOTHROW (newdecl)
1293 && !TREE_NOTHROW (olddecl)
1294 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1295 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1297 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1299 /* Whether or not the builtin can throw exceptions has no
1300 bearing on this declarator. */
1301 TREE_NOTHROW (olddecl) = 0;
1303 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1305 /* If a builtin function is redeclared as `static', merge
1306 the declarations, but make the original one static. */
1307 DECL_THIS_STATIC (olddecl) = 1;
1308 TREE_PUBLIC (olddecl) = 0;
1310 /* Make the old declaration consistent with the new one so
1311 that all remnants of the builtin-ness of this function
1312 will be banished. */
1313 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1314 COPY_DECL_RTL (newdecl, olddecl);
1317 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1319 /* C++ Standard, 3.3, clause 4:
1320 "[Note: a namespace name or a class template name must be unique
1321 in its declarative region (7.3.2, clause 14). ]" */
1322 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1323 && TREE_CODE (newdecl) != NAMESPACE_DECL
1324 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1325 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1326 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1327 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1329 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1330 && TREE_CODE (newdecl) != TYPE_DECL)
1331 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1332 && TREE_CODE (olddecl) != TYPE_DECL))
1334 /* We do nothing special here, because C++ does such nasty
1335 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1336 get shadowed, and know that if we need to find a TYPE_DECL
1337 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1338 slot of the identifier. */
1342 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1343 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1344 || (TREE_CODE (olddecl) == FUNCTION_DECL
1345 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1349 error ("%q#D redeclared as different kind of symbol", newdecl);
1350 if (TREE_CODE (olddecl) == TREE_LIST)
1351 olddecl = TREE_VALUE (olddecl);
1352 error ("previous declaration of %q+#D", olddecl);
1354 return error_mark_node;
1356 else if (!types_match)
1358 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1359 /* These are certainly not duplicate declarations; they're
1360 from different scopes. */
1363 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1365 /* The name of a class template may not be declared to refer to
1366 any other template, class, function, object, namespace, value,
1367 or type in the same scope. */
1368 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1369 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1371 error ("declaration of template %q#D", newdecl);
1372 error ("conflicts with previous declaration %q+#D", olddecl);
1374 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1375 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1376 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1377 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1378 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1379 DECL_TEMPLATE_PARMS (olddecl))
1380 /* Template functions can be disambiguated by
1382 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1383 TREE_TYPE (TREE_TYPE (olddecl))))
1385 error ("new declaration %q#D", newdecl);
1386 error ("ambiguates old declaration %q+#D", olddecl);
1390 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1392 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1394 error ("declaration of C function %q#D conflicts with",
1396 error ("previous declaration %q+#D here", olddecl);
1398 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1399 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1401 error ("new declaration %q#D", newdecl);
1402 error ("ambiguates old declaration %q+#D", olddecl);
1403 return error_mark_node;
1410 error ("conflicting declaration %q#D", newdecl);
1411 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1412 return error_mark_node;
1415 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1416 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1417 && (!DECL_TEMPLATE_INFO (newdecl)
1418 || (DECL_TI_TEMPLATE (newdecl)
1419 != DECL_TI_TEMPLATE (olddecl))))
1420 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1421 && (!DECL_TEMPLATE_INFO (olddecl)
1422 || (DECL_TI_TEMPLATE (olddecl)
1423 != DECL_TI_TEMPLATE (newdecl))))))
1424 /* It's OK to have a template specialization and a non-template
1425 with the same type, or to have specializations of two
1426 different templates with the same type. Note that if one is a
1427 specialization, and the other is an instantiation of the same
1428 template, that we do not exit at this point. That situation
1429 can occur if we instantiate a template class, and then
1430 specialize one of its methods. This situation is valid, but
1431 the declarations must be merged in the usual way. */
1433 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1434 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1435 && !DECL_USE_TEMPLATE (newdecl))
1436 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1437 && !DECL_USE_TEMPLATE (olddecl))))
1438 /* One of the declarations is a template instantiation, and the
1439 other is not a template at all. That's OK. */
1441 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1443 /* In [namespace.alias] we have:
1445 In a declarative region, a namespace-alias-definition can be
1446 used to redefine a namespace-alias declared in that declarative
1447 region to refer only to the namespace to which it already
1450 Therefore, if we encounter a second alias directive for the same
1451 alias, we can just ignore the second directive. */
1452 if (DECL_NAMESPACE_ALIAS (newdecl)
1453 && (DECL_NAMESPACE_ALIAS (newdecl)
1454 == DECL_NAMESPACE_ALIAS (olddecl)))
1456 /* [namespace.alias]
1458 A namespace-name or namespace-alias shall not be declared as
1459 the name of any other entity in the same declarative region.
1460 A namespace-name defined at global scope shall not be
1461 declared as the name of any other entity in any global scope
1463 error ("declaration of namespace %qD conflicts with", newdecl);
1464 error ("previous declaration of namespace %q+D here", olddecl);
1465 return error_mark_node;
1469 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1472 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1473 if (DECL_NAME (olddecl) != NULL_TREE)
1474 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1475 ? "%q+#D previously defined here"
1476 : "%q+#D previously declared here", olddecl);
1477 return error_mark_node;
1479 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1480 && DECL_INITIAL (olddecl) != NULL_TREE
1481 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1482 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1484 /* Prototype decl follows defn w/o prototype. */
1485 warning (0, "prototype for %q+#D", newdecl);
1486 warning (0, "%Jfollows non-prototype definition here", olddecl);
1488 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1489 || TREE_CODE (olddecl) == VAR_DECL)
1490 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1493 If two declarations of the same function or object
1494 specify different linkage-specifications ..., the program
1495 is ill-formed.... Except for functions with C++ linkage,
1496 a function declaration without a linkage specification
1497 shall not precede the first linkage specification for
1498 that function. A function can be declared without a
1499 linkage specification after an explicit linkage
1500 specification has been seen; the linkage explicitly
1501 specified in the earlier declaration is not affected by
1502 such a function declaration.
1504 DR 563 raises the question why the restrictions on
1505 functions should not also apply to objects. Older
1506 versions of G++ silently ignore the linkage-specification
1514 which is clearly wrong. Therefore, we now treat objects
1516 if (current_lang_depth () == 0)
1518 /* There is no explicit linkage-specification, so we use
1519 the linkage from the previous declaration. */
1520 if (!DECL_LANG_SPECIFIC (newdecl))
1521 retrofit_lang_decl (newdecl);
1522 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1526 error ("previous declaration of %q+#D with %qL linkage",
1527 olddecl, DECL_LANGUAGE (olddecl));
1528 error ("conflicts with new declaration with %qL linkage",
1529 DECL_LANGUAGE (newdecl));
1533 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1535 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1537 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1538 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1541 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1542 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1544 for (; t1 && t1 != void_list_node;
1545 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1546 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1548 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1551 permerror (input_location, "default argument given for parameter %d of %q#D",
1553 permerror (input_location, "after previous specification in %q+#D", olddecl);
1557 error ("default argument given for parameter %d of %q#D",
1559 error ("after previous specification in %q+#D",
1566 /* Do not merge an implicit typedef with an explicit one. In:
1570 typedef class A A __attribute__ ((foo));
1572 the attribute should apply only to the typedef. */
1573 if (TREE_CODE (olddecl) == TYPE_DECL
1574 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1575 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1578 /* If new decl is `static' and an `extern' was seen previously,
1580 warn_extern_redeclared_static (newdecl, olddecl);
1582 /* We have committed to returning 1 at this point. */
1583 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1585 /* Now that functions must hold information normally held
1586 by field decls, there is extra work to do so that
1587 declaration information does not get destroyed during
1589 if (DECL_VINDEX (olddecl))
1590 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1591 if (DECL_CONTEXT (olddecl))
1592 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1593 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1594 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1595 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1596 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1597 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1598 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1599 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1600 SET_OVERLOADED_OPERATOR_CODE
1601 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1602 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1604 /* Optionally warn about more than one declaration for the same
1605 name, but don't warn about a function declaration followed by a
1607 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1608 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1609 /* Don't warn about extern decl followed by definition. */
1610 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1611 /* Don't warn about friends, let add_friend take care of it. */
1612 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1614 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1615 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1618 if (DECL_DELETED_FN (newdecl))
1620 error ("deleted definition of %qD", newdecl);
1621 error ("after previous declaration %q+D", olddecl);
1625 /* Deal with C++: must preserve virtual function table size. */
1626 if (TREE_CODE (olddecl) == TYPE_DECL)
1628 tree newtype = TREE_TYPE (newdecl);
1629 tree oldtype = TREE_TYPE (olddecl);
1631 if (newtype != error_mark_node && oldtype != error_mark_node
1632 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1633 CLASSTYPE_FRIEND_CLASSES (newtype)
1634 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1636 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1639 /* Copy all the DECL_... slots specified in the new decl
1640 except for any that we copy here from the old type. */
1641 DECL_ATTRIBUTES (newdecl)
1642 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1644 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1648 old_result = DECL_TEMPLATE_RESULT (olddecl);
1649 new_result = DECL_TEMPLATE_RESULT (newdecl);
1650 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1651 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1652 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1653 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1655 DECL_ATTRIBUTES (old_result)
1656 = (*targetm.merge_decl_attributes) (old_result, new_result);
1658 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1660 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1661 && DECL_INITIAL (new_result))
1663 if (DECL_INITIAL (old_result))
1664 DECL_UNINLINABLE (old_result) = 1;
1666 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1667 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1668 DECL_NOT_REALLY_EXTERN (old_result)
1669 = DECL_NOT_REALLY_EXTERN (new_result);
1670 DECL_INTERFACE_KNOWN (old_result)
1671 = DECL_INTERFACE_KNOWN (new_result);
1672 DECL_DECLARED_INLINE_P (old_result)
1673 = DECL_DECLARED_INLINE_P (new_result);
1674 DECL_DISREGARD_INLINE_LIMITS (old_result)
1675 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1680 DECL_DECLARED_INLINE_P (old_result)
1681 |= DECL_DECLARED_INLINE_P (new_result);
1682 DECL_DISREGARD_INLINE_LIMITS (old_result)
1683 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1684 check_redeclaration_exception_specification (newdecl, olddecl);
1688 /* If the new declaration is a definition, update the file and
1689 line information on the declaration, and also make
1690 the old declaration the same definition. */
1691 if (DECL_INITIAL (new_result) != NULL_TREE)
1693 DECL_SOURCE_LOCATION (olddecl)
1694 = DECL_SOURCE_LOCATION (old_result)
1695 = DECL_SOURCE_LOCATION (newdecl);
1696 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1697 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1700 DECL_ARGUMENTS (old_result)
1701 = DECL_ARGUMENTS (new_result);
1702 for (parm = DECL_ARGUMENTS (old_result); parm;
1703 parm = TREE_CHAIN (parm))
1704 DECL_CONTEXT (parm) = old_result;
1713 /* Automatically handles default parameters. */
1714 tree oldtype = TREE_TYPE (olddecl);
1717 /* Merge the data types specified in the two decls. */
1718 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1720 /* If merge_types produces a non-typedef type, just use the old type. */
1721 if (TREE_CODE (newdecl) == TYPE_DECL
1722 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1725 if (TREE_CODE (newdecl) == VAR_DECL)
1727 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1728 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1729 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1730 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1731 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1732 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1734 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1735 if (DECL_LANG_SPECIFIC (olddecl)
1736 && CP_DECL_THREADPRIVATE_P (olddecl))
1738 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1739 if (!DECL_LANG_SPECIFIC (newdecl))
1740 retrofit_lang_decl (newdecl);
1742 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1743 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1747 /* Do this after calling `merge_types' so that default
1748 parameters don't confuse us. */
1749 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1750 check_redeclaration_exception_specification (newdecl, olddecl);
1751 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1753 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1754 check_default_args (newdecl);
1756 /* Lay the type out, unless already done. */
1757 if (! same_type_p (newtype, oldtype)
1758 && TREE_TYPE (newdecl) != error_mark_node
1759 && !(processing_template_decl && uses_template_parms (newdecl)))
1760 layout_type (TREE_TYPE (newdecl));
1762 if ((TREE_CODE (newdecl) == VAR_DECL
1763 || TREE_CODE (newdecl) == PARM_DECL
1764 || TREE_CODE (newdecl) == RESULT_DECL
1765 || TREE_CODE (newdecl) == FIELD_DECL
1766 || TREE_CODE (newdecl) == TYPE_DECL)
1767 && !(processing_template_decl && uses_template_parms (newdecl)))
1768 layout_decl (newdecl, 0);
1770 /* Merge the type qualifiers. */
1771 if (TREE_READONLY (newdecl))
1772 TREE_READONLY (olddecl) = 1;
1773 if (TREE_THIS_VOLATILE (newdecl))
1774 TREE_THIS_VOLATILE (olddecl) = 1;
1775 if (TREE_NOTHROW (newdecl))
1776 TREE_NOTHROW (olddecl) = 1;
1778 /* Merge deprecatedness. */
1779 if (TREE_DEPRECATED (newdecl))
1780 TREE_DEPRECATED (olddecl) = 1;
1782 /* Preserve function specific target and optimization options */
1783 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1785 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1786 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1787 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1788 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1790 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1791 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1792 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1793 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1796 /* Merge the initialization information. */
1797 if (DECL_INITIAL (newdecl) == NULL_TREE
1798 && DECL_INITIAL (olddecl) != NULL_TREE)
1800 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1801 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1802 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1803 && DECL_LANG_SPECIFIC (newdecl)
1804 && DECL_LANG_SPECIFIC (olddecl))
1806 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1807 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1811 /* Merge the section attribute.
1812 We want to issue an error if the sections conflict but that must be
1813 done later in decl_attributes since we are called before attributes
1815 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1816 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1818 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1820 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1821 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1822 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1823 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1824 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1825 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1826 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1827 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1828 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1829 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1830 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1831 /* Keep the old RTL. */
1832 COPY_DECL_RTL (olddecl, newdecl);
1834 else if (TREE_CODE (newdecl) == VAR_DECL
1835 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1837 /* Keep the old RTL. We cannot keep the old RTL if the old
1838 declaration was for an incomplete object and the new
1839 declaration is not since many attributes of the RTL will
1841 COPY_DECL_RTL (olddecl, newdecl);
1844 /* If cannot merge, then use the new type and qualifiers,
1845 and don't preserve the old rtl. */
1848 /* Clean out any memory we had of the old declaration. */
1849 tree oldstatic = value_member (olddecl, static_aggregates);
1851 TREE_VALUE (oldstatic) = error_mark_node;
1853 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1854 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1855 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1856 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1859 /* Merge the storage class information. */
1860 merge_weak (newdecl, olddecl);
1862 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1863 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1864 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1865 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1866 if (! DECL_EXTERNAL (olddecl))
1867 DECL_EXTERNAL (newdecl) = 0;
1869 new_template = NULL_TREE;
1870 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1872 bool new_redefines_gnu_inline = false;
1874 if (new_defines_function
1875 && ((DECL_INTERFACE_KNOWN (olddecl)
1876 && TREE_CODE (olddecl) == FUNCTION_DECL)
1877 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1878 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1879 == FUNCTION_DECL))))
1883 if (TREE_CODE (fn) == TEMPLATE_DECL)
1884 fn = DECL_TEMPLATE_RESULT (olddecl);
1886 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1889 if (!new_redefines_gnu_inline)
1891 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1892 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1893 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1895 DECL_TEMPLATE_INSTANTIATED (newdecl)
1896 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1898 /* If the OLDDECL is an instantiation and/or specialization,
1899 then the NEWDECL must be too. But, it may not yet be marked
1900 as such if the caller has created NEWDECL, but has not yet
1901 figured out that it is a redeclaration. */
1902 if (!DECL_USE_TEMPLATE (newdecl))
1903 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1905 /* Don't really know how much of the language-specific
1906 values we should copy from old to new. */
1907 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1908 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1909 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1910 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1911 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1912 if (DECL_TEMPLATE_INFO (newdecl))
1913 new_template = DECL_TI_TEMPLATE (newdecl);
1914 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1915 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1916 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1917 olddecl_friend = DECL_FRIEND_P (olddecl);
1918 hidden_friend = (DECL_ANTICIPATED (olddecl)
1919 && DECL_HIDDEN_FRIEND_P (olddecl)
1920 && newdecl_is_friend);
1922 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1923 if (TREE_CODE (newdecl) == FUNCTION_DECL
1924 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1926 DECL_BEFRIENDING_CLASSES (newdecl)
1927 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1928 DECL_BEFRIENDING_CLASSES (olddecl));
1929 /* DECL_THUNKS is only valid for virtual functions,
1930 otherwise it is a DECL_FRIEND_CONTEXT. */
1931 if (DECL_VIRTUAL_P (newdecl))
1932 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1936 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1940 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1941 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1943 /* If newdecl is not a specialization, then it is not a
1944 template-related function at all. And that means that we
1945 should have exited above, returning 0. */
1946 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
1948 if (TREE_USED (olddecl))
1949 /* From [temp.expl.spec]:
1951 If a template, a member template or the member of a class
1952 template is explicitly specialized then that
1953 specialization shall be declared before the first use of
1954 that specialization that would cause an implicit
1955 instantiation to take place, in every translation unit in
1956 which such a use occurs. */
1957 error ("explicit specialization of %qD after first use",
1960 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1962 /* Don't propagate visibility from the template to the
1963 specialization here. We'll do that in determine_visibility if
1965 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
1967 /* [temp.expl.spec/14] We don't inline explicit specialization
1968 just because the primary template says so. */
1970 else if (new_defines_function && DECL_INITIAL (olddecl))
1972 /* Never inline re-defined extern inline functions.
1973 FIXME: this could be better handled by keeping both
1974 function as separate declarations. */
1975 DECL_UNINLINABLE (newdecl) = 1;
1979 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1980 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1982 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1984 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1985 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1987 DECL_DISREGARD_INLINE_LIMITS (newdecl)
1988 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
1989 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
1990 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
1993 /* Preserve abstractness on cloned [cd]tors. */
1994 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1996 /* Update newdecl's parms to point at olddecl. */
1997 for (parm = DECL_ARGUMENTS (newdecl); parm;
1998 parm = TREE_CHAIN (parm))
1999 DECL_CONTEXT (parm) = olddecl;
2003 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2004 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2005 COPY_DECL_RTL (newdecl, olddecl);
2007 if (! types_match || new_defines_function)
2009 /* These need to be copied so that the names are available.
2010 Note that if the types do match, we'll preserve inline
2011 info and other bits, but if not, we won't. */
2012 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2013 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2015 if (new_defines_function)
2016 /* If defining a function declared with other language
2017 linkage, use the previously declared language linkage. */
2018 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2019 else if (types_match)
2021 /* If redeclaring a builtin function, and not a definition,
2022 it stays built in. */
2023 if (DECL_BUILT_IN (olddecl))
2025 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2026 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2027 /* If we're keeping the built-in definition, keep the rtl,
2028 regardless of declaration matches. */
2029 COPY_DECL_RTL (olddecl, newdecl);
2032 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2033 /* Don't clear out the arguments if we're just redeclaring a
2035 if (DECL_ARGUMENTS (olddecl))
2036 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2039 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2040 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2042 /* Now preserve various other info from the definition. */
2043 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2044 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2045 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2046 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2048 /* Warn about conflicting visibility specifications. */
2049 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2050 && DECL_VISIBILITY_SPECIFIED (newdecl)
2051 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2053 warning (OPT_Wattributes, "%q+D: visibility attribute ignored "
2054 "because it", newdecl);
2055 warning (OPT_Wattributes, "%Jconflicts with previous "
2056 "declaration here", olddecl);
2058 /* Choose the declaration which specified visibility. */
2059 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2061 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2062 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2064 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2065 so keep this behavior. */
2066 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2068 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2069 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2072 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2073 with that from NEWDECL below. */
2074 if (DECL_LANG_SPECIFIC (olddecl))
2076 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2077 != DECL_LANG_SPECIFIC (newdecl));
2078 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2081 /* Merge the USED information. */
2082 if (TREE_USED (olddecl))
2083 TREE_USED (newdecl) = 1;
2084 else if (TREE_USED (newdecl))
2085 TREE_USED (olddecl) = 1;
2087 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2091 function_size = sizeof (struct tree_decl_common);
2093 memcpy ((char *) olddecl + sizeof (struct tree_common),
2094 (char *) newdecl + sizeof (struct tree_common),
2095 function_size - sizeof (struct tree_common));
2097 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2098 (char *) newdecl + sizeof (struct tree_decl_common),
2099 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2101 /* If newdecl is a template instantiation, it is possible that
2102 the following sequence of events has occurred:
2104 o A friend function was declared in a class template. The
2105 class template was instantiated.
2107 o The instantiation of the friend declaration was
2108 recorded on the instantiation list, and is newdecl.
2110 o Later, however, instantiate_class_template called pushdecl
2111 on the newdecl to perform name injection. But, pushdecl in
2112 turn called duplicate_decls when it discovered that another
2113 declaration of a global function with the same name already
2116 o Here, in duplicate_decls, we decided to clobber newdecl.
2118 If we're going to do that, we'd better make sure that
2119 olddecl, and not newdecl, is on the list of
2120 instantiations so that if we try to do the instantiation
2121 again we won't get the clobbered declaration. */
2122 reregister_specialization (newdecl,
2128 size_t size = tree_code_size (TREE_CODE (olddecl));
2129 memcpy ((char *) olddecl + sizeof (struct tree_common),
2130 (char *) newdecl + sizeof (struct tree_common),
2131 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2132 switch (TREE_CODE (olddecl))
2142 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2143 (char *) newdecl + sizeof (struct tree_decl_common),
2144 size - sizeof (struct tree_decl_common)
2145 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2149 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2150 (char *) newdecl + sizeof (struct tree_decl_common),
2151 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2152 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2156 DECL_UID (olddecl) = olddecl_uid;
2158 DECL_FRIEND_P (olddecl) = 1;
2161 DECL_ANTICIPATED (olddecl) = 1;
2162 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2165 /* NEWDECL contains the merged attribute lists.
2166 Update OLDDECL to be the same. */
2167 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2169 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2170 so that encode_section_info has a chance to look at the new decl
2171 flags and attributes. */
2172 if (DECL_RTL_SET_P (olddecl)
2173 && (TREE_CODE (olddecl) == FUNCTION_DECL
2174 || (TREE_CODE (olddecl) == VAR_DECL
2175 && TREE_STATIC (olddecl))))
2176 make_decl_rtl (olddecl);
2178 /* The NEWDECL will no longer be needed. Because every out-of-class
2179 declaration of a member results in a call to duplicate_decls,
2180 freeing these nodes represents in a significant savings. */
2186 /* Return zero if the declaration NEWDECL is valid
2187 when the declaration OLDDECL (assumed to be for the same name)
2188 has already been seen.
2189 Otherwise return an error message format string with a %s
2190 where the identifier should go. */
2193 redeclaration_error_message (tree newdecl, tree olddecl)
2195 if (TREE_CODE (newdecl) == TYPE_DECL)
2197 /* Because C++ can put things into name space for free,
2198 constructs like "typedef struct foo { ... } foo"
2199 would look like an erroneous redeclaration. */
2200 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2203 return "redefinition of %q#D";
2205 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2207 /* If this is a pure function, its olddecl will actually be
2208 the original initialization to `0' (which we force to call
2209 abort()). Don't complain about redefinition in this case. */
2210 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2211 && DECL_INITIAL (olddecl) == NULL_TREE)
2214 /* If both functions come from different namespaces, this is not
2215 a redeclaration - this is a conflict with a used function. */
2216 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2217 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2218 && ! decls_match (olddecl, newdecl))
2219 return "%qD conflicts with used function";
2221 /* We'll complain about linkage mismatches in
2222 warn_extern_redeclared_static. */
2224 /* Defining the same name twice is no good. */
2225 if (DECL_INITIAL (olddecl) != NULL_TREE
2226 && DECL_INITIAL (newdecl) != NULL_TREE)
2228 if (DECL_NAME (olddecl) == NULL_TREE)
2229 return "%q#D not declared in class";
2230 else if (!GNU_INLINE_P (olddecl)
2231 || GNU_INLINE_P (newdecl))
2232 return "redefinition of %q#D";
2235 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2237 bool olda = GNU_INLINE_P (olddecl);
2238 bool newa = GNU_INLINE_P (newdecl);
2243 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2245 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2251 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2255 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2257 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2258 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2259 return "redefinition of %q#D";
2263 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2264 || (DECL_TEMPLATE_RESULT (newdecl)
2265 == DECL_TEMPLATE_RESULT (olddecl)))
2268 nt = DECL_TEMPLATE_RESULT (newdecl);
2269 if (DECL_TEMPLATE_INFO (nt))
2270 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2271 ot = DECL_TEMPLATE_RESULT (olddecl);
2272 if (DECL_TEMPLATE_INFO (ot))
2273 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2274 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2275 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2276 return "redefinition of %q#D";
2278 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2280 bool olda = GNU_INLINE_P (ot);
2281 bool newa = GNU_INLINE_P (nt);
2286 return "%q+D redeclared inline with %<gnu_inline%> attribute";
2288 return "%q+D redeclared inline without %<gnu_inline%> attribute";
2292 /* Core issue #226 (C++0x):
2294 If a friend function template declaration specifies a
2295 default template-argument, that declaration shall be a
2296 definition and shall be the only declaration of the
2297 function template in the translation unit. */
2298 if ((cxx_dialect != cxx98)
2299 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2300 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2301 /*is_primary=*/1, /*is_partial=*/0,
2302 /*is_friend_decl=*/2))
2303 return "redeclaration of friend %q#D may not have default template arguments";
2307 else if (TREE_CODE (newdecl) == VAR_DECL
2308 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2309 && (! DECL_LANG_SPECIFIC (olddecl)
2310 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2311 || DECL_THREAD_LOCAL_P (newdecl)))
2313 /* Only variables can be thread-local, and all declarations must
2314 agree on this property. */
2315 if (DECL_THREAD_LOCAL_P (newdecl))
2316 return "thread-local declaration of %q#D follows "
2317 "non-thread-local declaration";
2319 return "non-thread-local declaration of %q#D follows "
2320 "thread-local declaration";
2322 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2324 /* The objects have been declared at namespace scope. If either
2325 is a member of an anonymous union, then this is an invalid
2326 redeclaration. For example:
2332 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2333 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2334 return "redeclaration of %q#D";
2335 /* If at least one declaration is a reference, there is no
2336 conflict. For example:
2342 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2344 /* Reject two definitions. */
2345 return "redefinition of %q#D";
2349 /* Objects declared with block scope: */
2350 /* Reject two definitions, and reject a definition
2351 together with an external reference. */
2352 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2353 return "redeclaration of %q#D";
2358 /* Hash and equality functions for the named_label table. */
2361 named_label_entry_hash (const void *data)
2363 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2364 return DECL_UID (ent->label_decl);
2368 named_label_entry_eq (const void *a, const void *b)
2370 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2371 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2372 return ent_a->label_decl == ent_b->label_decl;
2375 /* Create a new label, named ID. */
2378 make_label_decl (tree id, int local_p)
2380 struct named_label_entry *ent;
2384 decl = build_decl (LABEL_DECL, id, void_type_node);
2386 DECL_CONTEXT (decl) = current_function_decl;
2387 DECL_MODE (decl) = VOIDmode;
2388 C_DECLARED_LABEL_FLAG (decl) = local_p;
2390 /* Say where one reference is to the label, for the sake of the
2391 error if it is not defined. */
2392 DECL_SOURCE_LOCATION (decl) = input_location;
2394 /* Record the fact that this identifier is bound to this label. */
2395 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2397 /* Create the label htab for the function on demand. */
2399 named_labels = htab_create_ggc (13, named_label_entry_hash,
2400 named_label_entry_eq, NULL);
2402 /* Record this label on the list of labels used in this function.
2403 We do this before calling make_label_decl so that we get the
2404 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2405 ent = GGC_CNEW (struct named_label_entry);
2406 ent->label_decl = decl;
2408 slot = htab_find_slot (named_labels, ent, INSERT);
2409 gcc_assert (*slot == NULL);
2415 /* Look for a label named ID in the current function. If one cannot
2416 be found, create one. (We keep track of used, but undefined,
2417 labels, and complain about them at the end of a function.) */
2420 lookup_label (tree id)
2424 timevar_push (TV_NAME_LOOKUP);
2425 /* You can't use labels at global scope. */
2426 if (current_function_decl == NULL_TREE)
2428 error ("label %qE referenced outside of any function", id);
2429 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2432 /* See if we've already got this label. */
2433 decl = IDENTIFIER_LABEL_VALUE (id);
2434 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2435 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2437 decl = make_label_decl (id, /*local_p=*/0);
2438 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2441 /* Declare a local label named ID. */
2444 declare_local_label (tree id)
2448 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2449 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2450 shadow = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2451 current_binding_level->shadowed_labels);
2452 current_binding_level->shadowed_labels = shadow;
2454 decl = make_label_decl (id, /*local_p=*/1);
2455 TREE_VALUE (shadow) = decl;
2460 /* Returns nonzero if it is ill-formed to jump past the declaration of
2461 DECL. Returns 2 if it's also a real problem. */
2464 decl_jump_unsafe (tree decl)
2466 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2467 || TREE_TYPE (decl) == error_mark_node)
2470 if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
2471 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2474 if (pod_type_p (TREE_TYPE (decl)))
2477 /* The POD stuff is just pedantry; why should it matter if the class
2478 contains a field of pointer to member type? */
2482 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2485 identify_goto (tree decl, const location_t *locus)
2488 permerror (input_location, "jump to label %qD", decl);
2490 permerror (input_location, "jump to case label");
2492 permerror (input_location, "%H from here", locus);
2495 /* Check that a single previously seen jump to a newly defined label
2496 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2497 the jump context; NAMES are the names in scope in LEVEL at the jump
2498 context; LOCUS is the source position of the jump or 0. Returns
2499 true if all is well. */
2502 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2503 bool exited_omp, const location_t *locus)
2505 struct cp_binding_level *b;
2506 bool identified = false, saw_eh = false, saw_omp = false;
2510 identify_goto (decl, locus);
2511 error (" exits OpenMP structured block");
2512 identified = saw_omp = true;
2515 for (b = current_binding_level; b ; b = b->level_chain)
2517 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2519 for (new_decls = b->names; new_decls != old_decls;
2520 new_decls = TREE_CHAIN (new_decls))
2522 int problem = decl_jump_unsafe (new_decls);
2528 identify_goto (decl, locus);
2532 error (" crosses initialization of %q+#D", new_decls);
2534 permerror (input_location, " enters scope of non-POD %q+#D", new_decls);
2539 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2543 identify_goto (decl, locus);
2546 if (b->kind == sk_try)
2547 error (" enters try block");
2549 error (" enters catch block");
2552 if (b->kind == sk_omp && !saw_omp)
2556 identify_goto (decl, locus);
2559 error (" enters OpenMP structured block");
2568 check_previous_goto (tree decl, struct named_label_use_entry *use)
2570 check_previous_goto_1 (decl, use->binding_level,
2571 use->names_in_scope, use->in_omp_scope,
2572 &use->o_goto_locus);
2576 check_switch_goto (struct cp_binding_level* level)
2578 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2581 /* Check that a new jump to a label DECL is OK. Called by
2582 finish_goto_stmt. */
2585 check_goto (tree decl)
2587 struct named_label_entry *ent, dummy;
2588 bool saw_catch = false, identified = false;
2591 /* We can't know where a computed goto is jumping.
2592 So we assume that it's OK. */
2593 if (TREE_CODE (decl) != LABEL_DECL)
2596 /* We didn't record any information about this label when we created it,
2597 and there's not much point since it's trivial to analyze as a return. */
2598 if (decl == cdtor_label)
2601 dummy.label_decl = decl;
2602 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2603 gcc_assert (ent != NULL);
2605 /* If the label hasn't been defined yet, defer checking. */
2606 if (! DECL_INITIAL (decl))
2608 struct named_label_use_entry *new_use;
2610 /* Don't bother creating another use if the last goto had the
2611 same data, and will therefore create the same set of errors. */
2613 && ent->uses->names_in_scope == current_binding_level->names)
2616 new_use = GGC_NEW (struct named_label_use_entry);
2617 new_use->binding_level = current_binding_level;
2618 new_use->names_in_scope = current_binding_level->names;
2619 new_use->o_goto_locus = input_location;
2620 new_use->in_omp_scope = false;
2622 new_use->next = ent->uses;
2623 ent->uses = new_use;
2627 if (ent->in_try_scope || ent->in_catch_scope
2628 || ent->in_omp_scope || ent->bad_decls)
2630 permerror (input_location, "jump to label %q+D", decl);
2631 permerror (input_location, " from here");
2635 for (bad = ent->bad_decls; bad; bad = TREE_CHAIN (bad))
2637 tree b = TREE_VALUE (bad);
2638 int u = decl_jump_unsafe (b);
2640 if (u > 1 && DECL_ARTIFICIAL (b))
2642 /* Can't skip init of __exception_info. */
2643 error ("%J enters catch block", b);
2647 error (" skips initialization of %q+#D", b);
2649 permerror (input_location, " enters scope of non-POD %q+#D", b);
2652 if (ent->in_try_scope)
2653 error (" enters try block");
2654 else if (ent->in_catch_scope && !saw_catch)
2655 error (" enters catch block");
2657 if (ent->in_omp_scope)
2658 error (" enters OpenMP structured block");
2659 else if (flag_openmp)
2661 struct cp_binding_level *b;
2662 for (b = current_binding_level; b ; b = b->level_chain)
2664 if (b == ent->binding_level)
2666 if (b->kind == sk_omp)
2670 permerror (input_location, "jump to label %q+D", decl);
2671 permerror (input_location, " from here");
2674 error (" exits OpenMP structured block");
2681 /* Check that a return is ok wrt OpenMP structured blocks.
2682 Called by finish_return_stmt. Returns true if all is well. */
2685 check_omp_return (void)
2687 struct cp_binding_level *b;
2688 for (b = current_binding_level; b ; b = b->level_chain)
2689 if (b->kind == sk_omp)
2691 error ("invalid exit from OpenMP structured block");
2697 /* Define a label, specifying the location in the source file.
2698 Return the LABEL_DECL node for the label. */
2701 define_label (location_t location, tree name)
2703 struct named_label_entry *ent, dummy;
2704 struct cp_binding_level *p;
2707 timevar_push (TV_NAME_LOOKUP);
2709 decl = lookup_label (name);
2711 dummy.label_decl = decl;
2712 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2713 gcc_assert (ent != NULL);
2715 /* After labels, make any new cleanups in the function go into their
2716 own new (temporary) binding contour. */
2717 for (p = current_binding_level;
2718 p->kind != sk_function_parms;
2720 p->more_cleanups_ok = 0;
2722 if (name == get_identifier ("wchar_t"))
2723 permerror (input_location, "label named wchar_t");
2725 if (DECL_INITIAL (decl) != NULL_TREE)
2727 error ("duplicate label %qD", decl);
2728 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
2732 struct named_label_use_entry *use;
2734 /* Mark label as having been defined. */
2735 DECL_INITIAL (decl) = error_mark_node;
2736 /* Say where in the source. */
2737 DECL_SOURCE_LOCATION (decl) = location;
2739 ent->binding_level = current_binding_level;
2740 ent->names_in_scope = current_binding_level->names;
2742 for (use = ent->uses; use ; use = use->next)
2743 check_previous_goto (decl, use);
2747 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2752 struct cp_binding_level *level;
2753 struct cp_switch *next;
2754 /* The SWITCH_STMT being built. */
2756 /* A splay-tree mapping the low element of a case range to the high
2757 element, or NULL_TREE if there is no high element. Used to
2758 determine whether or not a new case label duplicates an old case
2759 label. We need a tree, rather than simply a hash table, because
2760 of the GNU case range extension. */
2764 /* A stack of the currently active switch statements. The innermost
2765 switch statement is on the top of the stack. There is no need to
2766 mark the stack for garbage collection because it is only active
2767 during the processing of the body of a function, and we never
2768 collect at that point. */
2770 static struct cp_switch *switch_stack;
2772 /* Called right after a switch-statement condition is parsed.
2773 SWITCH_STMT is the switch statement being parsed. */
2776 push_switch (tree switch_stmt)
2778 struct cp_switch *p = XNEW (struct cp_switch);
2779 p->level = current_binding_level;
2780 p->next = switch_stack;
2781 p->switch_stmt = switch_stmt;
2782 p->cases = splay_tree_new (case_compare, NULL, NULL);
2789 struct cp_switch *cs = switch_stack;
2790 location_t switch_location;
2792 /* Emit warnings as needed. */
2793 if (EXPR_HAS_LOCATION (cs->switch_stmt))
2794 switch_location = EXPR_LOCATION (cs->switch_stmt);
2796 switch_location = input_location;
2797 if (!processing_template_decl)
2798 c_do_switch_warnings (cs->cases, switch_location,
2799 SWITCH_STMT_TYPE (cs->switch_stmt),
2800 SWITCH_STMT_COND (cs->switch_stmt));
2802 splay_tree_delete (cs->cases);
2803 switch_stack = switch_stack->next;
2807 /* Note that we've seen a definition of a case label, and complain if this
2808 is a bad place for one. */
2811 finish_case_label (tree low_value, tree high_value)
2814 struct cp_binding_level *p;
2816 if (processing_template_decl)
2820 /* For templates, just add the case label; we'll do semantic
2821 analysis at instantiation-time. */
2822 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2823 return add_stmt (build_case_label (low_value, high_value, label));
2826 /* Find the condition on which this switch statement depends. */
2827 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2828 if (cond && TREE_CODE (cond) == TREE_LIST)
2829 cond = TREE_VALUE (cond);
2831 if (!check_switch_goto (switch_stack->level))
2832 return error_mark_node;
2834 r = c_add_case_label (switch_stack->cases, cond,
2835 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2836 low_value, high_value);
2838 /* After labels, make any new cleanups in the function go into their
2839 own new (temporary) binding contour. */
2840 for (p = current_binding_level;
2841 p->kind != sk_function_parms;
2843 p->more_cleanups_ok = 0;
2848 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2851 typename_hash (const void* k)
2854 const_tree const t = (const_tree) k;
2856 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2857 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2862 typedef struct typename_info {
2870 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
2871 really of type `typename_info*' */
2874 typename_compare (const void * k1, const void * k2)
2876 const_tree const t1 = (const_tree) k1;
2877 const typename_info *const t2 = (const typename_info *) k2;
2879 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
2880 && TYPE_CONTEXT (t1) == t2->scope
2881 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
2882 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
2883 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
2886 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2887 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
2889 Returns the new TYPENAME_TYPE. */
2891 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2894 build_typename_type (tree context, tree name, tree fullname,
2895 enum tag_types tag_type)
2903 if (typename_htab == NULL)
2904 typename_htab = htab_create_ggc (61, &typename_hash,
2905 &typename_compare, NULL);
2907 ti.scope = FROB_CONTEXT (context);
2909 ti.template_id = fullname;
2910 ti.enum_p = tag_type == enum_type;
2911 ti.class_p = (tag_type == class_type
2912 || tag_type == record_type
2913 || tag_type == union_type);
2914 hash = (htab_hash_pointer (ti.scope)
2915 ^ htab_hash_pointer (ti.name));
2917 /* See if we already have this type. */
2918 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
2923 /* Build the TYPENAME_TYPE. */
2924 t = cxx_make_type (TYPENAME_TYPE);
2925 TYPE_CONTEXT (t) = ti.scope;
2926 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
2927 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
2928 TYPENAME_IS_CLASS_P (t) = ti.class_p;
2930 /* Build the corresponding TYPE_DECL. */
2931 d = build_decl (TYPE_DECL, name, t);
2932 TYPE_NAME (TREE_TYPE (d)) = d;
2933 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2934 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2935 DECL_ARTIFICIAL (d) = 1;
2937 /* Store it in the hash table. */
2940 /* TYPENAME_TYPEs must always be compared structurally, because
2941 they may or may not resolve down to another type depending on
2942 the currently open classes. */
2943 SET_TYPE_STRUCTURAL_EQUALITY (t);
2949 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
2950 provided to name the type. Returns an appropriate type, unless an
2951 error occurs, in which case error_mark_node is returned. If we
2952 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
2953 return that, rather than the _TYPE it corresponds to, in other
2954 cases we look through the type decl. If TF_ERROR is set, complain
2955 about errors, otherwise be quiet. */
2958 make_typename_type (tree context, tree name, enum tag_types tag_type,
2959 tsubst_flags_t complain)
2965 if (name == error_mark_node
2966 || context == NULL_TREE
2967 || context == error_mark_node)
2968 return error_mark_node;
2972 if (!(TYPE_LANG_SPECIFIC (name)
2973 && (CLASSTYPE_IS_TEMPLATE (name)
2974 || CLASSTYPE_USE_TEMPLATE (name))))
2975 name = TYPE_IDENTIFIER (name);
2977 /* Create a TEMPLATE_ID_EXPR for the type. */
2978 name = build_nt (TEMPLATE_ID_EXPR,
2979 CLASSTYPE_TI_TEMPLATE (name),
2980 CLASSTYPE_TI_ARGS (name));
2982 else if (TREE_CODE (name) == TYPE_DECL)
2983 name = DECL_NAME (name);
2987 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2989 name = TREE_OPERAND (name, 0);
2990 if (TREE_CODE (name) == TEMPLATE_DECL)
2991 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2992 else if (TREE_CODE (name) == OVERLOAD)
2994 error ("%qD is not a type", name);
2995 return error_mark_node;
2998 if (TREE_CODE (name) == TEMPLATE_DECL)
3000 error ("%qD used without template parameters", name);
3001 return error_mark_node;
3003 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3004 gcc_assert (TYPE_P (context));
3006 if (!MAYBE_CLASS_TYPE_P (context))
3008 if (complain & tf_error)
3009 error ("%q#T is not a class", context);
3010 return error_mark_node;
3013 /* When the CONTEXT is a dependent type, NAME could refer to a
3014 dependent base class of CONTEXT. But look inside it anyway
3015 if CONTEXT is a currently open scope, in case it refers to a
3016 member of the current instantiation or a non-dependent base;
3017 lookup will stop when we hit a dependent base. */
3018 if (!dependent_scope_p (context))
3019 /* We should only set WANT_TYPE when we're a nested typename type.
3020 Then we can give better diagnostics if we find a non-type. */
3021 t = lookup_field (context, name, 0, /*want_type=*/true);
3025 if (!t && dependent_type_p (context))
3026 return build_typename_type (context, name, fullname, tag_type);
3028 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3032 if (complain & tf_error)
3033 error (want_template ? "no class template named %q#T in %q#T"
3034 : "no type named %q#T in %q#T", name, context);
3035 return error_mark_node;
3038 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3040 if (complain & tf_error)
3041 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3043 return error_mark_node;
3045 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3047 if (complain & tf_error)
3048 error ("%<typename %T::%D%> names %q#T, which is not a type",
3050 return error_mark_node;
3053 if (complain & tf_error)
3054 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3057 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3059 /*entering_scope=*/0,
3060 tf_warning_or_error | tf_user);
3062 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3068 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3069 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3070 in which case error_mark_node is returned.
3072 If PARM_LIST is non-NULL, also make sure that the template parameter
3073 list of TEMPLATE_DECL matches.
3075 If COMPLAIN zero, don't complain about any errors that occur. */
3078 make_unbound_class_template (tree context, tree name, tree parm_list,
3079 tsubst_flags_t complain)
3085 name = TYPE_IDENTIFIER (name);
3086 else if (DECL_P (name))
3087 name = DECL_NAME (name);
3088 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3090 if (!dependent_type_p (context)
3091 || currently_open_class (context))
3093 tree tmpl = NULL_TREE;
3095 if (MAYBE_CLASS_TYPE_P (context))
3096 tmpl = lookup_field (context, name, 0, false);
3098 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3100 if (complain & tf_error)
3101 error ("no class template named %q#T in %q#T", name, context);
3102 return error_mark_node;
3106 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3108 if (complain & tf_error)
3110 error ("template parameters do not match template");
3111 error ("%q+D declared here", tmpl);
3113 return error_mark_node;
3116 if (complain & tf_error)
3117 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3122 /* Build the UNBOUND_CLASS_TEMPLATE. */
3123 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3124 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3125 TREE_TYPE (t) = NULL_TREE;
3126 SET_TYPE_STRUCTURAL_EQUALITY (t);
3128 /* Build the corresponding TEMPLATE_DECL. */
3129 d = build_decl (TEMPLATE_DECL, name, t);
3130 TYPE_NAME (TREE_TYPE (d)) = d;
3131 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3132 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3133 DECL_ARTIFICIAL (d) = 1;
3134 DECL_TEMPLATE_PARMS (d) = parm_list;
3141 /* Push the declarations of builtin types into the namespace.
3142 RID_INDEX is the index of the builtin type in the array
3143 RID_POINTERS. NAME is the name used when looking up the builtin
3144 type. TYPE is the _TYPE node for the builtin type. */
3147 record_builtin_type (enum rid rid_index,
3151 tree rname = NULL_TREE, tname = NULL_TREE;
3152 tree tdecl = NULL_TREE;
3154 if ((int) rid_index < (int) RID_MAX)
3155 rname = ridpointers[(int) rid_index];
3157 tname = get_identifier (name);
3159 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3160 eliminated. Built-in types should not be looked up name; their
3161 names are keywords that the parser can recognize. However, there
3162 is code in c-common.c that uses identifier_global_value to look
3163 up built-in types by name. */
3166 tdecl = build_decl (TYPE_DECL, tname, type);
3167 DECL_ARTIFICIAL (tdecl) = 1;
3168 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3174 tdecl = build_decl (TYPE_DECL, rname, type);
3175 DECL_ARTIFICIAL (tdecl) = 1;
3177 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3180 if (!TYPE_NAME (type))
3181 TYPE_NAME (type) = tdecl;
3184 debug_hooks->type_decl (tdecl, 0);
3187 /* Record one of the standard Java types.
3188 * Declare it as having the given NAME.
3189 * If SIZE > 0, it is the size of one of the integral types;
3190 * otherwise it is the negative of the size of one of the other types. */
3193 record_builtin_java_type (const char* name, int size)
3197 type = build_nonstandard_integer_type (size, 0);
3198 else if (size > -32)
3201 /* "__java_char" or ""__java_boolean". */
3202 type = build_nonstandard_integer_type (-size, 1);
3203 /* Get the signed type cached and attached to the unsigned type,
3204 so it doesn't get garbage-collected at "random" times,
3205 causing potential codegen differences out of different UIDs
3206 and different alias set numbers. */
3207 stype = build_nonstandard_integer_type (-size, 0);
3208 TREE_CHAIN (type) = stype;
3209 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3212 { /* "__java_float" or ""__java_double". */
3213 type = make_node (REAL_TYPE);
3214 TYPE_PRECISION (type) = - size;
3217 record_builtin_type (RID_MAX, name, type);
3218 decl = TYPE_NAME (type);
3220 /* Suppress generate debug symbol entries for these types,
3221 since for normal C++ they are just clutter.
3222 However, push_lang_context undoes this if extern "Java" is seen. */
3223 DECL_IGNORED_P (decl) = 1;
3225 TYPE_FOR_JAVA (type) = 1;
3229 /* Push a type into the namespace so that the back ends ignore it. */
3232 record_unknown_type (tree type, const char* name)
3234 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
3235 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3236 DECL_IGNORED_P (decl) = 1;
3237 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3238 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3239 TYPE_ALIGN (type) = 1;
3240 TYPE_USER_ALIGN (type) = 0;
3241 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3244 /* A string for which we should create an IDENTIFIER_NODE at
3247 typedef struct predefined_identifier
3249 /* The name of the identifier. */
3250 const char *const name;
3251 /* The place where the IDENTIFIER_NODE should be stored. */
3253 /* Nonzero if this is the name of a constructor or destructor. */
3254 const int ctor_or_dtor_p;
3255 } predefined_identifier;
3257 /* Create all the predefined identifiers. */
3260 initialize_predefined_identifiers (void)
3262 const predefined_identifier *pid;
3264 /* A table of identifiers to create at startup. */
3265 static const predefined_identifier predefined_identifiers[] = {
3266 { "C++", &lang_name_cplusplus, 0 },
3267 { "C", &lang_name_c, 0 },
3268 { "Java", &lang_name_java, 0 },
3269 /* Some of these names have a trailing space so that it is
3270 impossible for them to conflict with names written by users. */
3271 { "__ct ", &ctor_identifier, 1 },
3272 { "__base_ctor ", &base_ctor_identifier, 1 },
3273 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3274 { "__dt ", &dtor_identifier, 1 },
3275 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3276 { "__base_dtor ", &base_dtor_identifier, 1 },
3277 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3278 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3279 { "nelts", &nelts_identifier, 0 },
3280 { THIS_NAME, &this_identifier, 0 },
3281 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3282 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3283 { "_vptr", &vptr_identifier, 0 },
3284 { "__vtt_parm", &vtt_parm_identifier, 0 },
3285 { "::", &global_scope_name, 0 },
3286 { "std", &std_identifier, 0 },
3290 for (pid = predefined_identifiers; pid->name; ++pid)
3292 *pid->node = get_identifier (pid->name);
3293 if (pid->ctor_or_dtor_p)
3294 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3298 /* Create the predefined scalar types of C,
3299 and some nodes representing standard constants (0, 1, (void *)0).
3300 Initialize the global binding level.
3301 Make definitions for built-in primitive functions. */
3304 cxx_init_decl_processing (void)
3307 tree void_ftype_ptr;
3309 build_common_tree_nodes (flag_signed_char, false);
3311 /* Create all the identifiers we need. */
3312 initialize_predefined_identifiers ();
3314 /* Create the global variables. */
3315 push_to_top_level ();
3317 current_function_decl = NULL_TREE;
3318 current_binding_level = NULL;
3319 /* Enter the global namespace. */
3320 gcc_assert (global_namespace == NULL_TREE);
3321 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3323 TREE_PUBLIC (global_namespace) = 1;
3324 begin_scope (sk_namespace, global_namespace);
3326 current_lang_name = NULL_TREE;
3328 if (flag_visibility_ms_compat)
3329 default_visibility = VISIBILITY_HIDDEN;
3332 current_lang_name = lang_name_c;
3334 /* Create the `std' namespace. */
3335 push_namespace (std_identifier);
3336 std_node = current_namespace;
3339 c_common_nodes_and_builtins ();
3341 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3342 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3343 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3344 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3345 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3346 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3347 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3348 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3350 integer_two_node = build_int_cst (NULL_TREE, 2);
3351 integer_three_node = build_int_cst (NULL_TREE, 3);
3353 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3354 truthvalue_type_node = boolean_type_node;
3355 truthvalue_false_node = boolean_false_node;
3356 truthvalue_true_node = boolean_true_node;
3358 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3361 record_builtin_type (RID_MAX, NULL, string_type_node);
3364 delta_type_node = ptrdiff_type_node;
3365 vtable_index_type = ptrdiff_type_node;
3367 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3368 void_ftype = build_function_type (void_type_node, void_list_node);
3369 void_ftype_ptr = build_function_type (void_type_node,
3370 tree_cons (NULL_TREE,
3374 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3376 /* C++ extensions */
3378 unknown_type_node = make_node (UNKNOWN_TYPE);
3379 record_unknown_type (unknown_type_node, "unknown type");
3381 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3382 TREE_TYPE (unknown_type_node) = unknown_type_node;
3384 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3386 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3387 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3389 init_list_type_node = make_node (UNKNOWN_TYPE);
3390 record_unknown_type (init_list_type_node, "init list");
3393 /* Make sure we get a unique function type, so we can give
3394 its pointer type a name. (This wins for gdb.) */
3395 tree vfunc_type = make_node (FUNCTION_TYPE);
3396 TREE_TYPE (vfunc_type) = integer_type_node;
3397 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3398 layout_type (vfunc_type);
3400 vtable_entry_type = build_pointer_type (vfunc_type);
3402 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3405 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3406 layout_type (vtbl_type_node);
3407 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3408 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3409 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3410 layout_type (vtbl_ptr_type_node);
3411 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3413 push_namespace (get_identifier ("__cxxabiv1"));
3414 abi_node = current_namespace;
3417 global_type_node = make_node (LANG_TYPE);
3418 record_unknown_type (global_type_node, "global type");
3421 current_lang_name = lang_name_cplusplus;
3425 tree bad_alloc_type_node;
3426 tree bad_alloc_decl;
3427 tree newtype, deltype;
3428 tree ptr_ftype_sizetype;
3430 push_namespace (std_identifier);
3431 bad_alloc_id = get_identifier ("bad_alloc");
3432 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3433 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3435 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3436 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3437 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3441 = build_function_type (ptr_type_node,
3442 tree_cons (NULL_TREE,
3445 newtype = build_exception_variant
3446 (ptr_ftype_sizetype, add_exception_specifier
3447 (NULL_TREE, bad_alloc_type_node, -1));
3448 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3449 push_cp_library_fn (NEW_EXPR, newtype);
3450 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3451 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3452 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3456 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3458 /* Perform other language dependent initializations. */
3459 init_class_processing ();
3460 init_rtti_processing ();
3462 if (flag_exceptions)
3463 init_exception_processing ();
3465 if (! supports_one_only ())
3468 make_fname_decl = cp_make_fname_decl;
3469 start_fname_decls ();
3471 /* Show we use EH for cleanups. */
3472 if (flag_exceptions)
3473 using_eh_for_cleanups ();
3476 /* Generate an initializer for a function naming variable from
3477 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3478 filled in with the type of the init. */
3481 cp_fname_init (const char* name, tree *type_p)
3483 tree domain = NULL_TREE;
3485 tree init = NULL_TREE;
3490 length = strlen (name);
3491 domain = build_index_type (size_int (length));
3492 init = build_string (length + 1, name);
3495 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3496 type = build_cplus_array_type (type, domain);
3501 TREE_TYPE (init) = type;
3503 init = error_mark_node;
3508 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3509 decl, NAME is the initialization string and TYPE_DEP indicates whether
3510 NAME depended on the type of the function. We make use of that to detect
3511 __PRETTY_FUNCTION__ inside a template fn. This is being done
3512 lazily at the point of first use, so we mustn't push the decl now. */
3515 cp_make_fname_decl (tree id, int type_dep)
3517 const char *const name = (type_dep && processing_template_decl
3518 ? NULL : fname_as_string (type_dep));
3520 tree init = cp_fname_init (name, &type);
3521 tree decl = build_decl (VAR_DECL, id, type);
3524 free (CONST_CAST (char *, name));
3526 /* As we're using pushdecl_with_scope, we must set the context. */
3527 DECL_CONTEXT (decl) = current_function_decl;
3528 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3530 TREE_STATIC (decl) = 1;
3531 TREE_READONLY (decl) = 1;
3532 DECL_ARTIFICIAL (decl) = 1;
3534 TREE_USED (decl) = 1;
3536 if (current_function_decl)
3538 struct cp_binding_level *b = current_binding_level;
3539 if (b->kind == sk_function_parms)
3540 return error_mark_node;
3541 while (b->level_chain->kind != sk_function_parms)
3543 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3544 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3545 LOOKUP_ONLYCONVERTING);
3548 pushdecl_top_level_and_finish (decl, init);
3554 builtin_function_1 (tree decl, tree context, bool is_global)
3556 tree id = DECL_NAME (decl);
3557 const char *name = IDENTIFIER_POINTER (id);
3559 retrofit_lang_decl (decl);
3561 /* All nesting of C++ functions is lexical; there is never a "static
3562 chain" in the sense of GNU C nested functions. */
3563 DECL_NO_STATIC_CHAIN (decl) = 1;
3565 DECL_ARTIFICIAL (decl) = 1;
3566 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3567 SET_DECL_LANGUAGE (decl, lang_c);
3568 /* Runtime library routines are, by definition, available in an
3569 external shared object. */
3570 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3571 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3573 DECL_CONTEXT (decl) = context;
3576 pushdecl_top_level (decl);
3580 /* A function in the user's namespace should have an explicit
3581 declaration before it is used. Mark the built-in function as
3582 anticipated but not actually declared. */
3583 if (name[0] != '_' || name[1] != '_')
3584 DECL_ANTICIPATED (decl) = 1;
3585 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3587 size_t len = strlen (name);
3589 /* Treat __*_chk fortification functions as anticipated as well,
3590 unless they are __builtin_*. */
3591 if (len > strlen ("___chk")
3592 && memcmp (name + len - strlen ("_chk"),
3593 "_chk", strlen ("_chk") + 1) == 0)
3594 DECL_ANTICIPATED (decl) = 1;
3601 cxx_builtin_function (tree decl)
3603 tree id = DECL_NAME (decl);
3604 const char *name = IDENTIFIER_POINTER (id);
3605 /* All builtins that don't begin with an '_' should additionally
3606 go in the 'std' namespace. */
3609 tree decl2 = copy_node(decl);
3610 push_namespace (std_identifier);
3611 builtin_function_1 (decl2, std_node, false);
3615 return builtin_function_1 (decl, NULL_TREE, false);
3618 /* Like cxx_builtin_function, but guarantee the function is added to the global
3619 scope. This is to allow function specific options to add new machine
3620 dependent builtins when the target ISA changes via attribute((target(...)))
3621 which saves space on program startup if the program does not use non-generic
3625 cxx_builtin_function_ext_scope (tree decl)
3628 tree id = DECL_NAME (decl);
3629 const char *name = IDENTIFIER_POINTER (id);
3630 /* All builtins that don't begin with an '_' should additionally
3631 go in the 'std' namespace. */
3634 tree decl2 = copy_node(decl);
3635 push_namespace (std_identifier);
3636 builtin_function_1 (decl2, std_node, true);
3640 return builtin_function_1 (decl, NULL_TREE, true);
3643 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3644 function. Not called directly. */
3647 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3649 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3650 DECL_EXTERNAL (fn) = 1;
3651 TREE_PUBLIC (fn) = 1;
3652 DECL_ARTIFICIAL (fn) = 1;
3653 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3654 SET_DECL_LANGUAGE (fn, lang_c);
3655 /* Runtime library routines are, by definition, available in an
3656 external shared object. */
3657 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3658 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3662 /* Returns the _DECL for a library function with C linkage.
3663 We assume that such functions never throw; if this is incorrect,
3664 callers should unset TREE_NOTHROW. */
3667 build_library_fn (tree name, tree type)
3669 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3670 TREE_NOTHROW (fn) = 1;
3674 /* Returns the _DECL for a library function with C++ linkage. */
3677 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3679 tree fn = build_library_fn_1 (name, operator_code, type);
3680 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3681 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3682 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3686 /* Like build_library_fn, but takes a C string instead of an
3690 build_library_fn_ptr (const char* name, tree type)
3692 return build_library_fn (get_identifier (name), type);
3695 /* Like build_cp_library_fn, but takes a C string instead of an
3699 build_cp_library_fn_ptr (const char* name, tree type)
3701 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3704 /* Like build_library_fn, but also pushes the function so that we will
3705 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3706 may throw exceptions listed in RAISES. */
3709 push_library_fn (tree name, tree type, tree raises)
3714 type = build_exception_variant (type, raises);
3716 fn = build_library_fn (name, type);
3717 pushdecl_top_level (fn);
3721 /* Like build_cp_library_fn, but also pushes the function so that it
3722 will be found by normal lookup. */
3725 push_cp_library_fn (enum tree_code operator_code, tree type)
3727 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3734 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3738 push_void_library_fn (tree name, tree parmtypes)
3740 tree type = build_function_type (void_type_node, parmtypes);
3741 return push_library_fn (name, type, NULL_TREE);
3744 /* Like push_library_fn, but also note that this function throws
3745 and does not return. Used for __throw_foo and the like. */
3748 push_throw_library_fn (tree name, tree type)
3750 tree fn = push_library_fn (name, type, NULL_TREE);
3751 TREE_THIS_VOLATILE (fn) = 1;
3752 TREE_NOTHROW (fn) = 0;
3756 /* When we call finish_struct for an anonymous union, we create
3757 default copy constructors and such. But, an anonymous union
3758 shouldn't have such things; this function undoes the damage to the
3759 anonymous union type T.
3761 (The reason that we create the synthesized methods is that we don't
3762 distinguish `union { int i; }' from `typedef union { int i; } U'.
3763 The first is an anonymous union; the second is just an ordinary
3767 fixup_anonymous_aggr (tree t)
3771 /* Wipe out memory of synthesized methods. */
3772 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3773 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3774 TYPE_HAS_INIT_REF (t) = 0;
3775 TYPE_HAS_CONST_INIT_REF (t) = 0;
3776 TYPE_HAS_ASSIGN_REF (t) = 0;
3777 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3779 /* Splice the implicitly generated functions out of the TYPE_METHODS
3781 q = &TYPE_METHODS (t);
3784 if (DECL_ARTIFICIAL (*q))
3785 *q = TREE_CHAIN (*q);
3787 q = &TREE_CHAIN (*q);
3790 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3791 if (TYPE_METHODS (t))
3793 tree decl = TYPE_MAIN_DECL (t);
3795 if (TREE_CODE (t) != UNION_TYPE)
3796 error ("%Jan anonymous struct cannot have function members", decl);
3798 error ("%Jan anonymous union cannot have function members", decl);
3801 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3802 assignment operators (because they cannot have these methods themselves).
3803 For anonymous unions this is already checked because they are not allowed
3804 in any union, otherwise we have to check it. */
3805 if (TREE_CODE (t) != UNION_TYPE)
3809 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3810 if (TREE_CODE (field) == FIELD_DECL)
3812 type = TREE_TYPE (field);
3813 if (CLASS_TYPE_P (type))
3815 if (TYPE_NEEDS_CONSTRUCTING (type))
3816 error ("member %q+#D with constructor not allowed "
3817 "in anonymous aggregate", field);
3818 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3819 error ("member %q+#D with destructor not allowed "
3820 "in anonymous aggregate", field);
3821 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3822 error ("member %q+#D with copy assignment operator "
3823 "not allowed in anonymous aggregate", field);
3829 /* Make sure that a declaration with no declarator is well-formed, i.e.
3830 just declares a tagged type or anonymous union.
3832 Returns the type declared; or NULL_TREE if none. */
3835 check_tag_decl (cp_decl_specifier_seq *declspecs)
3837 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3838 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3839 /* If a class, struct, or enum type is declared by the DECLSPECS
3840 (i.e, if a class-specifier, enum-specifier, or non-typename
3841 elaborated-type-specifier appears in the DECLSPECS),
3842 DECLARED_TYPE is set to the corresponding type. */
3843 tree declared_type = NULL_TREE;
3844 bool error_p = false;
3846 if (declspecs->multiple_types_p)
3847 error ("multiple types in one declaration");
3848 else if (declspecs->redefined_builtin_type)
3850 if (!in_system_header)
3851 permerror (input_location, "redeclaration of C++ built-in type %qT",
3852 declspecs->redefined_builtin_type);
3857 && TYPE_P (declspecs->type)
3858 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3859 && MAYBE_CLASS_TYPE_P (declspecs->type))
3860 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3861 declared_type = declspecs->type;
3862 else if (declspecs->type == error_mark_node)
3864 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3865 permerror (input_location, "declaration does not declare anything");
3866 /* Check for an anonymous union. */
3867 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3868 && TYPE_ANONYMOUS_P (declared_type))
3870 /* 7/3 In a simple-declaration, the optional init-declarator-list
3871 can be omitted only when declaring a class (clause 9) or
3872 enumeration (7.2), that is, when the decl-specifier-seq contains
3873 either a class-specifier, an elaborated-type-specifier with
3874 a class-key (9.1), or an enum-specifier. In these cases and
3875 whenever a class-specifier or enum-specifier is present in the
3876 decl-specifier-seq, the identifiers in these specifiers are among
3877 the names being declared by the declaration (as class-name,
3878 enum-names, or enumerators, depending on the syntax). In such
3879 cases, and except for the declaration of an unnamed bit-field (9.6),
3880 the decl-specifier-seq shall introduce one or more names into the
3881 program, or shall redeclare a name introduced by a previous
3882 declaration. [Example:
3883 enum { }; // ill-formed
3884 typedef class { }; // ill-formed
3888 error ("missing type-name in typedef-declaration");
3891 /* Anonymous unions are objects, so they can have specifiers. */;
3892 SET_ANON_AGGR_TYPE_P (declared_type);
3894 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3895 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3900 if (declspecs->specs[(int)ds_inline]
3901 || declspecs->specs[(int)ds_virtual])
3902 error ("%qs can only be specified for functions",
3903 declspecs->specs[(int)ds_inline]
3904 ? "inline" : "virtual");
3906 && (!current_class_type
3907 || current_scope () != current_class_type))
3908 error ("%<friend%> can only be specified inside a class");
3909 else if (declspecs->specs[(int)ds_explicit])
3910 error ("%<explicit%> can only be specified for constructors");
3911 else if (declspecs->storage_class)
3912 error ("a storage class can only be specified for objects "
3914 else if (declspecs->specs[(int)ds_const]
3915 || declspecs->specs[(int)ds_volatile]
3916 || declspecs->specs[(int)ds_restrict]
3917 || declspecs->specs[(int)ds_thread])
3918 error ("qualifiers can only be specified for objects "
3920 else if (saw_typedef)
3921 warning (0, "%<typedef%> was ignored in this declaration");
3924 return declared_type;
3927 /* Called when a declaration is seen that contains no names to declare.
3928 If its type is a reference to a structure, union or enum inherited
3929 from a containing scope, shadow that tag name for the current scope
3930 with a forward reference.
3931 If its type defines a new named structure or union
3932 or defines an enum, it is valid but we need not do anything here.
3933 Otherwise, it is an error.
3935 C++: may have to grok the declspecs to learn about static,
3936 complain for anonymous unions.
3938 Returns the TYPE declared -- or NULL_TREE if none. */
3941 shadow_tag (cp_decl_specifier_seq *declspecs)
3943 tree t = check_tag_decl (declspecs);
3948 if (declspecs->attributes)
3950 warning (0, "attribute ignored in declaration of %q+#T", t);
3951 warning (0, "attribute for %q+#T must follow the %qs keyword",
3952 t, class_key_or_enum_as_string (t));
3956 if (maybe_process_partial_specialization (t) == error_mark_node)
3959 /* This is where the variables in an anonymous union are
3960 declared. An anonymous union declaration looks like:
3962 because there is no declarator after the union, the parser
3963 sends that declaration here. */
3964 if (ANON_AGGR_TYPE_P (t))
3966 fixup_anonymous_aggr (t);
3968 if (TYPE_FIELDS (t))
3970 tree decl = grokdeclarator (/*declarator=*/NULL,
3971 declspecs, NORMAL, 0, NULL);
3972 finish_anon_union (decl);
3979 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3982 groktypename (cp_decl_specifier_seq *type_specifiers,
3983 const cp_declarator *declarator,
3984 bool is_template_arg)
3988 enum decl_context context
3989 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
3990 attrs = type_specifiers->attributes;
3991 type_specifiers->attributes = NULL_TREE;
3992 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
3993 if (attrs && type != error_mark_node)
3995 if (CLASS_TYPE_P (type))
3996 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
3997 "outside of definition", type);
3998 else if (MAYBE_CLASS_TYPE_P (type))
3999 /* A template type parameter or other dependent type. */
4000 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4001 "type %qT without an associated declaration", type);
4003 cplus_decl_attributes (&type, attrs, 0);
4008 /* Process a DECLARATOR for a function-scope variable declaration,
4009 namespace-scope variable declaration, or function declaration.
4010 (Function definitions go through start_function; class member
4011 declarations appearing in the body of the class go through
4012 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4013 If an error occurs, the error_mark_node is returned instead.
4015 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4016 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4017 for an explicitly defaulted function, or SD_DELETED for an explicitly
4018 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4019 implicitly initialized via a default constructor. ATTRIBUTES and
4020 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4021 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4022 set, the caller is responsible for calling pop_scope. */
4025 start_decl (const cp_declarator *declarator,
4026 cp_decl_specifier_seq *declspecs,
4029 tree prefix_attributes,
4030 tree *pushed_scope_p)
4038 *pushed_scope_p = NULL_TREE;
4040 /* An object declared as __attribute__((deprecated)) suppresses
4041 warnings of uses of other deprecated items. */
4042 if (lookup_attribute ("deprecated", attributes))
4043 deprecated_state = DEPRECATED_SUPPRESS;
4045 attributes = chainon (attributes, prefix_attributes);
4047 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4050 deprecated_state = DEPRECATED_NORMAL;
4052 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4053 || decl == error_mark_node)
4054 return error_mark_node;
4056 type = TREE_TYPE (decl);
4058 context = DECL_CONTEXT (decl);
4062 *pushed_scope_p = push_scope (context);
4064 /* We are only interested in class contexts, later. */
4065 if (TREE_CODE (context) == NAMESPACE_DECL)
4066 context = NULL_TREE;
4070 /* Is it valid for this decl to have an initializer at all?
4071 If not, set INITIALIZED to zero, which will indirectly
4072 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4073 switch (TREE_CODE (decl))
4076 error ("typedef %qD is initialized (use decltype instead)", decl);
4077 return error_mark_node;
4080 if (initialized == SD_DELETED)
4081 /* We'll handle the rest of the semantics later, but we need to
4082 set this now so it's visible to duplicate_decls. */
4083 DECL_DELETED_FN (decl) = 1;
4092 if (! toplevel_bindings_p ()
4093 && DECL_EXTERNAL (decl))
4094 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4096 DECL_EXTERNAL (decl) = 0;
4097 if (toplevel_bindings_p ())
4098 TREE_STATIC (decl) = 1;
4101 /* If this is a typedef that names the class for linkage purposes
4102 (7.1.3p8), apply any attributes directly to the type. */
4103 if (TREE_CODE (decl) == TYPE_DECL
4104 && TAGGED_TYPE_P (TREE_TYPE (decl))
4105 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4106 flags = ATTR_FLAG_TYPE_IN_PLACE;
4110 /* Set attributes here so if duplicate decl, will have proper attributes. */
4111 cplus_decl_attributes (&decl, attributes, flags);
4113 /* Dllimported symbols cannot be defined. Static data members (which
4114 can be initialized in-class and dllimported) go through grokfield,
4115 not here, so we don't need to exclude those decls when checking for
4117 if (initialized && DECL_DLLIMPORT_P (decl))
4119 error ("definition of %q#D is marked %<dllimport%>", decl);
4120 DECL_DLLIMPORT_P (decl) = 0;
4123 /* If #pragma weak was used, mark the decl weak now. */
4124 maybe_apply_pragma_weak (decl);
4126 if (TREE_CODE (decl) == FUNCTION_DECL
4127 && DECL_DECLARED_INLINE_P (decl)
4128 && DECL_UNINLINABLE (decl)
4129 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4130 warning (0, "inline function %q+D given attribute noinline", decl);
4132 if (context && COMPLETE_TYPE_P (complete_type (context)))
4134 if (TREE_CODE (decl) == VAR_DECL)
4136 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4137 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4138 error ("%q#D is not a static member of %q#T", decl, context);
4141 if (DECL_CONTEXT (field) != context)
4143 if (!same_type_p (DECL_CONTEXT (field), context))
4144 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4145 "to be defined as %<%T::%D%>",
4146 DECL_CONTEXT (field), DECL_NAME (decl),
4147 context, DECL_NAME (decl));
4148 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4150 if (processing_specialization
4151 && template_class_depth (context) == 0
4152 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4153 error ("template header not allowed in member definition "
4154 "of explicitly specialized class");
4155 /* Static data member are tricky; an in-class initialization
4156 still doesn't provide a definition, so the in-class
4157 declaration will have DECL_EXTERNAL set, but will have an
4158 initialization. Thus, duplicate_decls won't warn
4159 about this situation, and so we check here. */
4160 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4161 error ("duplicate initialization of %qD", decl);
4162 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4168 tree field = check_classfn (context, decl,
4169 (processing_template_decl
4170 > template_class_depth (context))
4171 ? current_template_parms
4173 if (field && field != error_mark_node
4174 && duplicate_decls (decl, field,
4175 /*newdecl_is_friend=*/false))
4179 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4180 DECL_IN_AGGR_P (decl) = 0;
4181 /* Do not mark DECL as an explicit specialization if it was not
4182 already marked as an instantiation; a declaration should
4183 never be marked as a specialization unless we know what
4184 template is being specialized. */
4185 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4187 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4189 /* [temp.expl.spec] An explicit specialization of a static data
4190 member of a template is a definition if the declaration
4191 includes an initializer; otherwise, it is a declaration.
4193 We check for processing_specialization so this only applies
4194 to the new specialization syntax. */
4195 if (!initialized && processing_specialization)
4196 DECL_EXTERNAL (decl) = 1;
4199 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4200 permerror (input_location, "declaration of %q#D outside of class is not definition",
4204 was_public = TREE_PUBLIC (decl);
4206 /* Enter this declaration into the symbol table. */
4207 decl = maybe_push_decl (decl);
4209 if (processing_template_decl)
4210 decl = push_template_decl (decl);
4211 if (decl == error_mark_node)
4212 return error_mark_node;
4214 /* Tell the back end to use or not use .common as appropriate. If we say
4215 -fconserve-space, we want this to save .data space, at the expense of
4216 wrong semantics. If we say -fno-conserve-space, we want this to
4217 produce errors about redefs; to do this we force variables into the
4219 if (flag_conserve_space
4220 && TREE_CODE (decl) == VAR_DECL
4221 && TREE_PUBLIC (decl)
4222 && !DECL_THREAD_LOCAL_P (decl)
4223 && !have_global_bss_p ())
4224 DECL_COMMON (decl) = 1;
4226 if (TREE_CODE (decl) == VAR_DECL
4227 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4228 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4230 /* This is a const variable with implicit 'static'. Set
4231 DECL_THIS_STATIC so we can tell it from variables that are
4232 !TREE_PUBLIC because of the anonymous namespace. */
4233 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4234 DECL_THIS_STATIC (decl) = 1;
4237 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4238 start_decl_1 (decl, initialized);
4243 /* Process the declaration of a variable DECL. INITIALIZED is true
4244 iff DECL is explicitly initialized. (INITIALIZED is false if the
4245 variable is initialized via an implicitly-called constructor.)
4246 This function must be called for ordinary variables (including, for
4247 example, implicit instantiations of templates), but must not be
4248 called for template declarations. */
4251 start_decl_1 (tree decl, bool initialized)
4255 bool aggregate_definition_p;
4257 gcc_assert (!processing_template_decl);
4259 if (error_operand_p (decl))
4262 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4264 type = TREE_TYPE (decl);
4265 complete_p = COMPLETE_TYPE_P (type);
4266 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4268 /* If an explicit initializer is present, or if this is a definition
4269 of an aggregate, then we need a complete type at this point.
4270 (Scalars are always complete types, so there is nothing to
4271 check.) This code just sets COMPLETE_P; errors (if necessary)
4272 are issued below. */
4273 if ((initialized || aggregate_definition_p)
4275 && COMPLETE_TYPE_P (complete_type (type)))
4278 /* We will not yet have set TREE_READONLY on DECL if the type
4279 was "const", but incomplete, before this point. But, now, we
4280 have a complete type, so we can try again. */
4281 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4285 /* Is it valid for this decl to have an initializer at all? */
4287 /* Don't allow initializations for incomplete types except for
4288 arrays which might be completed by the initialization. */
4290 ; /* A complete type is ok. */
4291 else if (type_uses_auto (type))
4292 ; /* An auto type is ok. */
4293 else if (TREE_CODE (type) != ARRAY_TYPE)
4295 error ("variable %q#D has initializer but incomplete type", decl);
4296 type = TREE_TYPE (decl) = error_mark_node;
4298 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4300 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4301 error ("elements of array %q#D have incomplete type", decl);
4302 /* else we already gave an error in start_decl. */
4305 else if (aggregate_definition_p && !complete_p)
4307 if (type_uses_auto (type))
4308 error ("declaration of %q#D has no initializer", decl);
4310 error ("aggregate %q#D has incomplete type and cannot be defined",
4312 /* Change the type so that assemble_variable will give
4313 DECL an rtl we can live with: (mem (const_int 0)). */
4314 type = TREE_TYPE (decl) = error_mark_node;
4317 /* Create a new scope to hold this declaration if necessary.
4318 Whether or not a new scope is necessary cannot be determined
4319 until after the type has been completed; if the type is a
4320 specialization of a class template it is not until after
4321 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4322 will be set correctly. */
4323 maybe_push_cleanup_level (type);
4326 /* Handle initialization of references. DECL, TYPE, and INIT have the
4327 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4328 but will be set to a new CLEANUP_STMT if a temporary is created
4329 that must be destroyed subsequently.
4331 Returns an initializer expression to use to initialize DECL, or
4332 NULL if the initialization can be performed statically.
4334 Quotes on semantics can be found in ARM 8.4.3. */
4337 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4341 if (init == NULL_TREE)
4343 if ((DECL_LANG_SPECIFIC (decl) == 0
4344 || DECL_IN_AGGR_P (decl) == 0)
4345 && ! DECL_THIS_EXTERN (decl))
4346 error ("%qD declared as reference but not initialized", decl);
4350 if (TREE_CODE (init) == TREE_LIST)
4351 init = build_x_compound_expr_from_list (init, "initializer");
4353 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4354 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4355 /* Note: default conversion is only called in very special cases. */
4356 init = decay_conversion (init);
4358 /* Convert INIT to the reference type TYPE. This may involve the
4359 creation of a temporary, whose lifetime must be the same as that
4360 of the reference. If so, a DECL_EXPR for the temporary will be
4361 added just after the DECL_EXPR for DECL. That's why we don't set
4362 DECL_INITIAL for local references (instead assigning to them
4363 explicitly); we need to allow the temporary to be initialized
4365 tmp = initialize_reference (type, init, decl, cleanup);
4367 if (tmp == error_mark_node)
4369 else if (tmp == NULL_TREE)
4371 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4375 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4378 DECL_INITIAL (decl) = tmp;
4383 /* Subroutine of check_initializer. We're initializing a DECL of
4384 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4385 extend the lifetime of the underlying array to match that of the decl,
4386 just like for reference initialization. CLEANUP is as for
4387 grok_reference_init. */
4390 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4392 tree aggr_init, array, arrtype;
4393 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4394 aggr_init = TARGET_EXPR_INITIAL (init);
4395 init = build2 (INIT_EXPR, type, decl, init);
4397 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4398 arrtype = TREE_TYPE (array);
4400 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4401 array = TREE_OPERAND (array, 0);
4402 /* If the array is constant, finish_compound_literal already made it a
4403 static variable and we don't need to do anything here. */
4404 if (decl && TREE_CODE (array) == TARGET_EXPR)
4407 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4408 var = build_address (var);
4409 var = convert (arrtype, var);
4410 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4411 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4416 /* Designated initializers in arrays are not supported in GNU C++.
4417 The parser cannot detect this error since it does not know whether
4418 a given brace-enclosed initializer is for a class type or for an
4419 array. This function checks that CE does not use a designated
4420 initializer. If it does, an error is issued. Returns true if CE
4421 is valid, i.e., does not have a designated initializer. */
4424 check_array_designated_initializer (const constructor_elt *ce)
4426 /* Designated initializers for array elements are not supported. */
4429 /* The parser only allows identifiers as designated
4431 if (ce->index == error_mark_node)
4432 error ("name used in a GNU-style designated "
4433 "initializer for an array");
4436 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4437 error ("name %qD used in a GNU-style designated "
4438 "initializer for an array", ce->index);
4446 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4447 array until we finish parsing the initializer. If that's the
4448 situation we're in, update DECL accordingly. */
4451 maybe_deduce_size_from_array_init (tree decl, tree init)
4453 tree type = TREE_TYPE (decl);
4455 if (TREE_CODE (type) == ARRAY_TYPE
4456 && TYPE_DOMAIN (type) == NULL_TREE
4457 && TREE_CODE (decl) != TYPE_DECL)
4459 /* do_default is really a C-ism to deal with tentative definitions.
4460 But let's leave it here to ease the eventual merge. */
4461 int do_default = !DECL_EXTERNAL (decl);
4462 tree initializer = init ? init : DECL_INITIAL (decl);
4465 /* Check that there are no designated initializers in INIT, as
4466 those are not supported in GNU C++, and as the middle-end
4467 will crash if presented with a non-numeric designated
4469 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4471 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4472 constructor_elt *ce;
4475 VEC_iterate (constructor_elt, v, i, ce);
4477 if (!check_array_designated_initializer (ce))
4483 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4487 error ("initializer fails to determine size of %qD", decl);
4488 TREE_TYPE (decl) = error_mark_node;
4490 else if (failure == 2)
4494 error ("array size missing in %qD", decl);
4495 TREE_TYPE (decl) = error_mark_node;
4497 /* If a `static' var's size isn't known, make it extern as
4498 well as static, so it does not get allocated. If it's not
4499 `static', then don't mark it extern; finish_incomplete_decl
4500 will give it a default size and it will get allocated. */
4501 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4502 DECL_EXTERNAL (decl) = 1;
4504 else if (failure == 3)
4506 error ("zero-size array %qD", decl);
4507 TREE_TYPE (decl) = error_mark_node;
4511 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4513 layout_decl (decl, 0);
4517 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4518 any appropriate error messages regarding the layout. */
4521 layout_var_decl (tree decl)
4525 type = TREE_TYPE (decl);
4526 if (type == error_mark_node)
4529 /* If we haven't already layed out this declaration, do so now.
4530 Note that we must not call complete type for an external object
4531 because it's type might involve templates that we are not
4532 supposed to instantiate yet. (And it's perfectly valid to say
4533 `extern X x' for some incomplete type `X'.) */
4534 if (!DECL_EXTERNAL (decl))
4535 complete_type (type);
4536 if (!DECL_SIZE (decl)
4537 && TREE_TYPE (decl) != error_mark_node
4538 && (COMPLETE_TYPE_P (type)
4539 || (TREE_CODE (type) == ARRAY_TYPE
4540 && !TYPE_DOMAIN (type)
4541 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4542 layout_decl (decl, 0);
4544 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4546 /* An automatic variable with an incomplete type: that is an error.
4547 Don't talk about array types here, since we took care of that
4548 message in grokdeclarator. */
4549 error ("storage size of %qD isn't known", decl);
4550 TREE_TYPE (decl) = error_mark_node;
4553 /* Keep this code around in case we later want to control debug info
4554 based on whether a type is "used". (jason 1999-11-11) */
4556 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4557 /* Let debugger know it should output info for this type. */
4558 note_debug_info_needed (ttype);
4560 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4561 note_debug_info_needed (DECL_CONTEXT (decl));
4564 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4565 && DECL_SIZE (decl) != NULL_TREE
4566 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4568 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4569 constant_expression_warning (DECL_SIZE (decl));
4572 error ("storage size of %qD isn't constant", decl);
4573 TREE_TYPE (decl) = error_mark_node;
4578 /* If a local static variable is declared in an inline function, or if
4579 we have a weak definition, we must endeavor to create only one
4580 instance of the variable at link-time. */
4583 maybe_commonize_var (tree decl)
4585 /* Static data in a function with comdat linkage also has comdat
4587 if (TREE_STATIC (decl)
4588 /* Don't mess with __FUNCTION__. */
4589 && ! DECL_ARTIFICIAL (decl)
4590 && DECL_FUNCTION_SCOPE_P (decl)
4591 /* Unfortunately, import_export_decl has not always been called
4592 before the function is processed, so we cannot simply check
4594 && (DECL_COMDAT (DECL_CONTEXT (decl))
4595 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4596 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4597 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4601 /* With weak symbols, we simply make the variable COMDAT;
4602 that will cause copies in multiple translations units to
4604 comdat_linkage (decl);
4608 if (DECL_INITIAL (decl) == NULL_TREE
4609 || DECL_INITIAL (decl) == error_mark_node)
4611 /* Without weak symbols, we can use COMMON to merge
4612 uninitialized variables. */
4613 TREE_PUBLIC (decl) = 1;
4614 DECL_COMMON (decl) = 1;
4618 /* While for initialized variables, we must use internal
4619 linkage -- which means that multiple copies will not
4621 TREE_PUBLIC (decl) = 0;
4622 DECL_COMMON (decl) = 0;
4623 warning (0, "sorry: semantics of inline function static "
4624 "data %q+#D are wrong (you'll wind up "
4625 "with multiple copies)", decl);
4626 warning (0, "%J you can work around this by removing "
4632 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4633 /* Set it up again; we might have set DECL_INITIAL since the last
4635 comdat_linkage (decl);
4638 /* Issue an error message if DECL is an uninitialized const variable. */
4641 check_for_uninitialized_const_var (tree decl)
4643 tree type = TREE_TYPE (decl);
4645 /* ``Unless explicitly declared extern, a const object does not have
4646 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4648 if (TREE_CODE (decl) == VAR_DECL
4649 && TREE_CODE (type) != REFERENCE_TYPE
4650 && CP_TYPE_CONST_P (type)
4651 && !TYPE_NEEDS_CONSTRUCTING (type)
4652 && !DECL_INITIAL (decl))
4653 error ("uninitialized const %qD", decl);
4657 /* Structure holding the current initializer being processed by reshape_init.
4658 CUR is a pointer to the current element being processed, END is a pointer
4659 after the last element present in the initializer. */
4660 typedef struct reshape_iterator_t
4662 constructor_elt *cur;
4663 constructor_elt *end;
4666 static tree reshape_init_r (tree, reshape_iter *, bool);
4668 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4669 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4670 initialized. If there are no more such fields, the return value
4674 next_initializable_field (tree field)
4677 && (TREE_CODE (field) != FIELD_DECL
4678 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4679 || DECL_ARTIFICIAL (field)))
4680 field = TREE_CHAIN (field);
4685 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4686 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4687 INTEGER_CST representing the size of the array minus one (the maximum index),
4688 or NULL_TREE if the array was declared without specifying the size. D is
4689 the iterator within the constructor. */
4692 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4695 bool sized_array_p = (max_index != NULL_TREE);
4696 unsigned HOST_WIDE_INT max_index_cst = 0;
4697 unsigned HOST_WIDE_INT index;
4699 /* The initializer for an array is always a CONSTRUCTOR. */
4700 new_init = build_constructor (init_list_type_node, NULL);
4704 /* Minus 1 is used for zero sized arrays. */
4705 if (integer_all_onesp (max_index))
4708 if (host_integerp (max_index, 1))
4709 max_index_cst = tree_low_cst (max_index, 1);
4710 /* sizetype is sign extended, not zero extended. */
4712 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4716 /* Loop until there are no more initializers. */
4718 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4723 check_array_designated_initializer (d->cur);
4724 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4725 if (elt_init == error_mark_node)
4726 return error_mark_node;
4727 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4733 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4734 Parameters are the same of reshape_init_r. */
4737 reshape_init_array (tree type, reshape_iter *d)
4739 tree max_index = NULL_TREE;
4741 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4743 if (TYPE_DOMAIN (type))
4744 max_index = array_type_nelts (type);
4746 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4749 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4750 Parameters are the same of reshape_init_r. */
4753 reshape_init_vector (tree type, reshape_iter *d)
4755 tree max_index = NULL_TREE;
4758 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4760 if (COMPOUND_LITERAL_P (d->cur->value))
4762 tree value = d->cur->value;
4763 if (!same_type_p (TREE_TYPE (value), type))
4765 error ("invalid type %qT as initializer for a vector of type %qT",
4766 TREE_TYPE (d->cur->value), type);
4767 value = error_mark_node;
4773 /* For a vector, the representation type is a struct
4774 containing a single member which is an array of the
4775 appropriate size. */
4776 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4777 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4778 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4780 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4783 /* Subroutine of reshape_init_r, processes the initializers for classes
4784 or union. Parameters are the same of reshape_init_r. */
4787 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4792 gcc_assert (CLASS_TYPE_P (type));
4794 /* The initializer for a class is always a CONSTRUCTOR. */
4795 new_init = build_constructor (init_list_type_node, NULL);
4796 field = next_initializable_field (TYPE_FIELDS (type));
4802 An initializer for an aggregate member that is an
4803 empty class shall have the form of an empty
4804 initializer-list {}. */
4805 if (!first_initializer_p)
4807 error ("initializer for %qT must be brace-enclosed", type);
4808 return error_mark_node;
4813 /* Loop through the initializable fields, gathering initializers. */
4814 while (d->cur != d->end)
4818 /* Handle designated initializers, as an extension. */
4821 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4823 if (!field || TREE_CODE (field) != FIELD_DECL)
4825 error ("%qT has no non-static data member named %qD", type,
4827 return error_mark_node;
4831 /* If we processed all the member of the class, we are done. */
4835 field_init = reshape_init_r (TREE_TYPE (field), d,
4836 /*first_initializer_p=*/false);
4837 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4841 When a union is initialized with a brace-enclosed
4842 initializer, the braces shall only contain an
4843 initializer for the first member of the union. */
4844 if (TREE_CODE (type) == UNION_TYPE)
4847 field = next_initializable_field (TREE_CHAIN (field));
4853 /* Subroutine of reshape_init, which processes a single initializer (part of
4854 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4855 iterator within the CONSTRUCTOR which points to the initializer to process.
4856 FIRST_INITIALIZER_P is true if this is the first initializer of the
4857 CONSTRUCTOR node. */
4860 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4862 tree init = d->cur->value;
4864 if (error_operand_p (init))
4865 return error_mark_node;
4867 /* A non-aggregate type is always initialized with a single
4869 if (!CP_AGGREGATE_TYPE_P (type))
4871 /* It is invalid to initialize a non-aggregate type with a
4872 brace-enclosed initializer before C++0x.
4873 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4874 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4875 a CONSTRUCTOR (with a record type). */
4876 if (TREE_CODE (init) == CONSTRUCTOR
4877 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4879 if (SCALAR_TYPE_P (type))
4881 error ("braces around scalar initializer for type %qT", type);
4882 init = error_mark_node;
4885 maybe_warn_cpp0x ("extended initializer lists");
4894 All implicit type conversions (clause _conv_) are considered when
4895 initializing the aggregate member with an initializer from an
4896 initializer-list. If the initializer can initialize a member,
4897 the member is initialized. Otherwise, if the member is itself a
4898 non-empty subaggregate, brace elision is assumed and the
4899 initializer is considered for the initialization of the first
4900 member of the subaggregate. */
4901 if (TREE_CODE (init) != CONSTRUCTOR
4902 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4908 /* [dcl.init.string]
4910 A char array (whether plain char, signed char, or unsigned char)
4911 can be initialized by a string-literal (optionally enclosed in
4912 braces); a wchar_t array can be initialized by a wide
4913 string-literal (optionally enclosed in braces). */
4914 if (TREE_CODE (type) == ARRAY_TYPE
4915 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4917 tree str_init = init;
4919 /* Strip one level of braces if and only if they enclose a single
4920 element (as allowed by [dcl.init.string]). */
4921 if (!first_initializer_p
4922 && TREE_CODE (str_init) == CONSTRUCTOR
4923 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4925 str_init = VEC_index (constructor_elt,
4926 CONSTRUCTOR_ELTS (str_init), 0)->value;
4929 /* If it's a string literal, then it's the initializer for the array
4930 as a whole. Otherwise, continue with normal initialization for
4931 array types (one value per array element). */
4932 if (TREE_CODE (str_init) == STRING_CST)
4939 /* The following cases are about aggregates. If we are not within a full
4940 initializer already, and there is not a CONSTRUCTOR, it means that there
4941 is a missing set of braces (that is, we are processing the case for
4942 which reshape_init exists). */
4943 if (!first_initializer_p)
4945 if (TREE_CODE (init) == CONSTRUCTOR)
4947 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4948 /* There is no need to reshape pointer-to-member function
4949 initializers, as they are always constructed correctly
4950 by the front end. */
4952 else if (COMPOUND_LITERAL_P (init))
4953 /* For a nested compound literal, there is no need to reshape since
4954 brace elision is not allowed. Even if we decided to allow it,
4955 we should add a call to reshape_init in finish_compound_literal,
4956 before calling digest_init, so changing this code would still
4957 not be necessary. */
4958 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4962 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4963 return reshape_init (type, init);
4967 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4971 /* Dispatch to specialized routines. */
4972 if (CLASS_TYPE_P (type))
4973 return reshape_init_class (type, d, first_initializer_p);
4974 else if (TREE_CODE (type) == ARRAY_TYPE)
4975 return reshape_init_array (type, d);
4976 else if (TREE_CODE (type) == VECTOR_TYPE)
4977 return reshape_init_vector (type, d);
4982 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4983 brace-enclosed aggregate initializer.
4985 INIT is the CONSTRUCTOR containing the list of initializers describing
4986 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4987 It may not presently match the shape of the TYPE; for example:
4989 struct S { int a; int b; };
4990 struct S a[] = { 1, 2, 3, 4 };
4992 Here INIT will hold a VEC of four elements, rather than a
4993 VEC of two elements, each itself a VEC of two elements. This
4994 routine transforms INIT from the former form into the latter. The
4995 revised CONSTRUCTOR node is returned. */
4998 reshape_init (tree type, tree init)
5000 VEC(constructor_elt, gc) *v;
5004 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5006 v = CONSTRUCTOR_ELTS (init);
5008 /* An empty constructor does not need reshaping, and it is always a valid
5010 if (VEC_empty (constructor_elt, v))
5013 /* Recurse on this CONSTRUCTOR. */
5014 d.cur = VEC_index (constructor_elt, v, 0);
5015 d.end = d.cur + VEC_length (constructor_elt, v);
5017 new_init = reshape_init_r (type, &d, true);
5018 if (new_init == error_mark_node)
5019 return error_mark_node;
5021 /* Make sure all the element of the constructor were used. Otherwise,
5022 issue an error about exceeding initializers. */
5024 error ("too many initializers for %qT", type);
5029 /* Verify array initializer. Returns true if errors have been reported. */
5032 check_array_initializer (tree decl, tree type, tree init)
5034 tree element_type = TREE_TYPE (type);
5036 /* The array type itself need not be complete, because the
5037 initializer may tell us how many elements are in the array.
5038 But, the elements of the array must be complete. */
5039 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5042 error ("elements of array %q#D have incomplete type", decl);
5044 error ("elements of array %q#T have incomplete type", type);
5047 /* It is not valid to initialize a VLA. */
5049 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5050 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5053 error ("variable-sized object %qD may not be initialized", decl);
5055 error ("variable-sized compound literal");
5061 /* Subroutine of check_initializer; args are passed down from that function.
5062 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5065 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5068 int saved_stmts_are_full_exprs_p = 0;
5069 if (building_stmt_tree ())
5071 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5072 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5074 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5075 if (building_stmt_tree ())
5076 current_stmt_tree ()->stmts_are_full_exprs_p =
5077 saved_stmts_are_full_exprs_p;
5081 /* Verify INIT (the initializer for DECL), and record the
5082 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5083 grok_reference_init.
5085 If the return value is non-NULL, it is an expression that must be
5086 evaluated dynamically to initialize DECL. */
5089 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5091 tree type = TREE_TYPE (decl);
5092 tree init_code = NULL;
5094 /* Things that are going to be initialized need to have complete
5096 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5098 if (type == error_mark_node)
5099 /* We will have already complained. */
5102 if (TREE_CODE (type) == ARRAY_TYPE)
5104 if (check_array_initializer (decl, type, init))
5107 else if (!COMPLETE_TYPE_P (type))
5109 error ("%qD has incomplete type", decl);
5110 TREE_TYPE (decl) = error_mark_node;
5114 /* There is no way to make a variable-sized class type in GNU C++. */
5115 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5117 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5119 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5120 if (SCALAR_TYPE_P (type))
5124 maybe_warn_cpp0x ("extended initializer lists");
5125 init = build_zero_init (type, NULL_TREE, false);
5127 else if (init_len != 1)
5129 error ("scalar object %qD requires one element in initializer",
5131 TREE_TYPE (decl) = error_mark_node;
5137 if (TREE_CODE (decl) == CONST_DECL)
5139 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5141 DECL_INITIAL (decl) = init;
5143 gcc_assert (init != NULL_TREE);
5146 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5147 init = grok_reference_init (decl, type, init, cleanup);
5150 /* Do not reshape constructors of vectors (they don't need to be
5152 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5154 if (is_std_init_list (type))
5155 return build_init_list_var_init (decl, type, init, cleanup);
5156 else if (TYPE_NON_AGGREGATE_CLASS (type))
5158 /* Don't reshape if the class has constructors. */
5159 if (cxx_dialect == cxx98)
5160 error ("in C++98 %qD must be initialized by constructor, "
5163 init = build_tree_list (NULL_TREE, init);
5165 else if ((*targetm.vector_opaque_p) (type))
5167 error ("opaque vector types cannot be initialized");
5168 init = error_mark_node;
5171 init = reshape_init (type, init);
5174 /* If DECL has an array type without a specific bound, deduce the
5175 array size from the initializer. */
5176 maybe_deduce_size_from_array_init (decl, init);
5177 type = TREE_TYPE (decl);
5178 if (type == error_mark_node)
5181 if (TYPE_NEEDS_CONSTRUCTING (type)
5182 || (CLASS_TYPE_P (type)
5183 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5184 return build_aggr_init_full_exprs (decl, init, flags);
5185 else if (TREE_CODE (init) != TREE_VEC)
5187 init_code = store_init_value (decl, init);
5188 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5189 && DECL_INITIAL (decl)
5190 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5191 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5192 warning (0, "array %qD initialized by parenthesized string literal %qE",
5193 decl, DECL_INITIAL (decl));
5197 else if (DECL_EXTERNAL (decl))
5199 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5200 return build_aggr_init_full_exprs (decl, init, flags);
5201 else if (MAYBE_CLASS_TYPE_P (type))
5203 tree core_type = strip_array_types (type);
5205 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5206 error ("structure %qD with uninitialized const members", decl);
5207 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5208 error ("structure %qD with uninitialized reference members", decl);
5210 check_for_uninitialized_const_var (decl);
5213 check_for_uninitialized_const_var (decl);
5215 if (init && init != error_mark_node)
5216 init_code = build2 (INIT_EXPR, type, decl, init);
5221 /* If DECL is not a local variable, give it RTL. */
5224 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5226 int toplev = toplevel_bindings_p ();
5228 const char *filename;
5230 /* Set the DECL_ASSEMBLER_NAME for the object. */
5233 /* The `register' keyword, when used together with an
5234 asm-specification, indicates that the variable should be
5235 placed in a particular register. */
5236 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5238 set_user_assembler_name (decl, asmspec);
5239 DECL_HARD_REGISTER (decl) = 1;
5243 if (TREE_CODE (decl) == FUNCTION_DECL
5244 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5245 set_builtin_user_assembler_name (decl, asmspec);
5246 set_user_assembler_name (decl, asmspec);
5250 /* Handle non-variables up front. */
5251 if (TREE_CODE (decl) != VAR_DECL)
5253 rest_of_decl_compilation (decl, toplev, at_eof);
5257 /* If we see a class member here, it should be a static data
5259 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5261 gcc_assert (TREE_STATIC (decl));
5262 /* An in-class declaration of a static data member should be
5263 external; it is only a declaration, and not a definition. */
5264 if (init == NULL_TREE)
5265 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5268 /* We don't create any RTL for local variables. */
5269 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5272 /* We defer emission of local statics until the corresponding
5273 DECL_EXPR is expanded. */
5274 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5276 /* We try to defer namespace-scope static constants so that they are
5277 not emitted into the object file unnecessarily. */
5278 filename = input_filename;
5279 if (!DECL_VIRTUAL_P (decl)
5280 && TREE_READONLY (decl)
5281 && DECL_INITIAL (decl) != NULL_TREE
5282 && DECL_INITIAL (decl) != error_mark_node
5284 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5286 && !TREE_PUBLIC (decl))
5288 /* Fool with the linkage of static consts according to #pragma
5290 struct c_fileinfo *finfo = get_fileinfo (filename);
5291 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5293 TREE_PUBLIC (decl) = 1;
5294 DECL_EXTERNAL (decl) = finfo->interface_only;
5299 /* Likewise for template instantiations. */
5300 else if (DECL_LANG_SPECIFIC (decl)
5301 && DECL_IMPLICIT_INSTANTIATION (decl))
5304 /* If we're not deferring, go ahead and assemble the variable. */
5306 rest_of_decl_compilation (decl, toplev, at_eof);
5309 /* walk_tree helper for wrap_temporary_cleanups, below. */
5312 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5314 if (TYPE_P (*stmt_p))
5320 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5322 tree guard = (tree)data;
5323 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5325 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5326 /* Tell honor_protect_cleanup_actions to handle this as a separate
5328 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5330 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5336 /* We're initializing a local variable which has a cleanup GUARD. If there
5337 are any temporaries used in the initializer INIT of this variable, we
5338 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5339 variable will be cleaned up properly if one of them throws.
5341 Unfortunately, there's no way to express this properly in terms of
5342 nesting, as the regions for the temporaries overlap the region for the
5343 variable itself; if there are two temporaries, the variable needs to be
5344 the first thing destroyed if either of them throws. However, we only
5345 want to run the variable's cleanup if it actually got constructed. So
5346 we need to guard the temporary cleanups with the variable's cleanup if
5347 they are run on the normal path, but not if they are run on the
5348 exceptional path. We implement this by telling
5349 honor_protect_cleanup_actions to strip the variable cleanup from the
5350 exceptional path. */
5353 wrap_temporary_cleanups (tree init, tree guard)
5355 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5358 /* Generate code to initialize DECL (a local variable). */
5361 initialize_local_var (tree decl, tree init)
5363 tree type = TREE_TYPE (decl);
5367 gcc_assert (TREE_CODE (decl) == VAR_DECL
5368 || TREE_CODE (decl) == RESULT_DECL);
5369 gcc_assert (!TREE_STATIC (decl));
5371 if (DECL_SIZE (decl) == NULL_TREE)
5373 /* If we used it already as memory, it must stay in memory. */
5374 DECL_INITIAL (decl) = NULL_TREE;
5375 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5379 if (type == error_mark_node)
5382 /* Compute and store the initial value. */
5383 already_used = TREE_USED (decl) || TREE_USED (type);
5385 /* Generate a cleanup, if necessary. */
5386 cleanup = cxx_maybe_build_cleanup (decl);
5388 /* Perform the initialization. */
5391 int saved_stmts_are_full_exprs_p;
5393 /* If we're only initializing a single object, guard the destructors
5394 of any temporaries used in its initializer with its destructor.
5395 This isn't right for arrays because each element initialization is
5396 a full-expression. */
5397 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5398 wrap_temporary_cleanups (init, cleanup);
5400 gcc_assert (building_stmt_tree ());
5401 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5402 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5403 finish_expr_stmt (init);
5404 current_stmt_tree ()->stmts_are_full_exprs_p =
5405 saved_stmts_are_full_exprs_p;
5408 /* Set this to 0 so we can tell whether an aggregate which was
5409 initialized was ever used. Don't do this if it has a
5410 destructor, so we don't complain about the 'resource
5411 allocation is initialization' idiom. Now set
5412 attribute((unused)) on types so decls of that type will be
5413 marked used. (see TREE_USED, above.) */
5414 if (TYPE_NEEDS_CONSTRUCTING (type)
5416 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5417 && DECL_NAME (decl))
5418 TREE_USED (decl) = 0;
5419 else if (already_used)
5420 TREE_USED (decl) = 1;
5423 finish_decl_cleanup (decl, cleanup);
5426 /* DECL is a VAR_DECL for a compiler-generated variable with static
5427 storage duration (like a virtual table) whose initializer is a
5428 compile-time constant. INIT must be either a TREE_LIST of values,
5429 or a CONSTRUCTOR. Initialize the variable and provide it to the
5433 initialize_artificial_var (tree decl, tree init)
5435 gcc_assert (DECL_ARTIFICIAL (decl));
5436 if (TREE_CODE (init) == TREE_LIST)
5437 init = build_constructor_from_list (TREE_TYPE (decl), init);
5438 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5439 DECL_INITIAL (decl) = init;
5440 DECL_INITIALIZED_P (decl) = 1;
5441 determine_visibility (decl);
5442 layout_var_decl (decl);
5443 maybe_commonize_var (decl);
5444 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5447 /* INIT is the initializer for a variable, as represented by the
5448 parser. Returns true iff INIT is value-dependent. */
5451 value_dependent_init_p (tree init)
5453 if (TREE_CODE (init) == TREE_LIST)
5454 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5455 return any_value_dependent_elements_p (init);
5456 else if (TREE_CODE (init) == CONSTRUCTOR)
5457 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5459 VEC(constructor_elt, gc) *elts;
5463 elts = CONSTRUCTOR_ELTS (init);
5464 nelts = VEC_length (constructor_elt, elts);
5465 for (i = 0; i < nelts; ++i)
5466 if (value_dependent_init_p (VEC_index (constructor_elt,
5471 /* It must be a simple expression, e.g., int i = 3; */
5472 return value_dependent_expression_p (init);
5477 /* Finish processing of a declaration;
5478 install its line number and initial value.
5479 If the length of an array type is not known before,
5480 it must be determined now, from the initial value, or it is an error.
5482 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5483 true, then INIT is an integral constant expression.
5485 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5486 if the (init) syntax was used. */
5489 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5490 tree asmspec_tree, int flags)
5494 const char *asmspec = NULL;
5495 int was_readonly = 0;
5496 bool var_definition_p = false;
5497 int saved_processing_template_decl;
5500 if (decl == error_mark_node)
5505 error ("assignment (not initialization) in declaration");
5509 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5510 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5511 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5513 type = TREE_TYPE (decl);
5514 if (type == error_mark_node)
5517 /* Assume no cleanup is required. */
5518 cleanup = NULL_TREE;
5519 saved_processing_template_decl = processing_template_decl;
5521 /* If a name was specified, get the string. */
5522 if (global_scope_p (current_binding_level))
5523 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5524 if (asmspec_tree && asmspec_tree != error_mark_node)
5525 asmspec = TREE_STRING_POINTER (asmspec_tree);
5527 if (current_class_type
5528 && CP_DECL_CONTEXT (decl) == current_class_type
5529 && TYPE_BEING_DEFINED (current_class_type)
5530 && (DECL_INITIAL (decl) || init))
5531 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5533 auto_node = type_uses_auto (type);
5536 if (init == NULL_TREE)
5538 error ("declaration of %q#D has no initializer", decl);
5539 TREE_TYPE (decl) = error_mark_node;
5542 if (TREE_CODE (init) == TREE_LIST)
5543 init = build_x_compound_expr_from_list (init, "initializer");
5544 if (describable_type (init))
5546 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5547 if (type == error_mark_node)
5552 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5555 if (init == ridpointers[(int)RID_DELETE])
5557 /* FIXME check this is 1st decl. */
5558 DECL_DELETED_FN (decl) = 1;
5559 DECL_DECLARED_INLINE_P (decl) = 1;
5560 DECL_INITIAL (decl) = error_mark_node;
5561 FOR_EACH_CLONE (clone, decl)
5563 DECL_DELETED_FN (clone) = 1;
5564 DECL_DECLARED_INLINE_P (clone) = 1;
5565 DECL_INITIAL (clone) = error_mark_node;
5569 else if (init == ridpointers[(int)RID_DEFAULT])
5571 if (!defaultable_fn_p (decl))
5573 error ("%qD cannot be defaulted", decl);
5574 DECL_INITIAL (decl) = NULL_TREE;
5578 DECL_DEFAULTED_FN (decl) = 1;
5579 FOR_EACH_CLONE (clone, decl)
5580 DECL_DEFAULTED_FN (clone) = 1;
5585 if (processing_template_decl)
5587 bool type_dependent_p;
5589 /* Add this declaration to the statement-tree. */
5590 if (at_function_scope_p ())
5591 add_decl_expr (decl);
5593 type_dependent_p = dependent_type_p (type);
5595 if (check_for_bare_parameter_packs (init))
5598 DECL_INITIAL (decl) = NULL_TREE;
5601 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5603 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5604 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5605 TREE_CONSTANT (decl) = 1;
5608 /* Generally, initializers in templates are expanded when the
5609 template is instantiated. But, if DECL is an integral
5610 constant static data member, then it can be used in future
5611 integral constant expressions, and its value must be
5614 && DECL_CLASS_SCOPE_P (decl)
5615 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5616 && !type_dependent_p
5617 && !value_dependent_init_p (init)))
5620 DECL_INITIAL (decl) = init;
5621 if (TREE_CODE (decl) == VAR_DECL
5622 && !DECL_PRETTY_FUNCTION_P (decl)
5623 && !type_dependent_p)
5624 maybe_deduce_size_from_array_init (decl, init);
5628 if (TREE_CODE (init) == TREE_LIST)
5630 /* If the parenthesized-initializer form was used (e.g.,
5631 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5632 arguments. (There is generally only one.) We convert them
5635 for (; list; list = TREE_CHAIN (list))
5637 tree elt = TREE_VALUE (list);
5638 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5642 init = fold_non_dependent_expr (init);
5643 processing_template_decl = 0;
5646 /* Take care of TYPE_DECLs up front. */
5647 if (TREE_CODE (decl) == TYPE_DECL)
5649 if (type != error_mark_node
5650 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5652 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5653 warning (0, "shadowing previous type declaration of %q#D", decl);
5654 set_identifier_type_value (DECL_NAME (decl), decl);
5657 /* If we have installed this as the canonical typedef for this
5658 type, and that type has not been defined yet, delay emitting
5659 the debug information for it, as we will emit it later. */
5660 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5661 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5662 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5664 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5669 /* A reference will be modified here, as it is initialized. */
5670 if (! DECL_EXTERNAL (decl)
5671 && TREE_READONLY (decl)
5672 && TREE_CODE (type) == REFERENCE_TYPE)
5675 TREE_READONLY (decl) = 0;
5678 if (TREE_CODE (decl) == VAR_DECL)
5680 /* Only PODs can have thread-local storage. Other types may require
5681 various kinds of non-trivial initialization. */
5682 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5683 error ("%qD cannot be thread-local because it has non-POD type %qT",
5684 decl, TREE_TYPE (decl));
5685 /* If this is a local variable that will need a mangled name,
5686 register it now. We must do this before processing the
5687 initializer for the variable, since the initialization might
5688 require a guard variable, and since the mangled name of the
5689 guard variable will depend on the mangled name of this
5691 if (DECL_FUNCTION_SCOPE_P (decl)
5692 && TREE_STATIC (decl)
5693 && !DECL_ARTIFICIAL (decl))
5694 push_local_name (decl);
5695 /* Convert the initializer to the type of DECL, if we have not
5696 already initialized DECL. */
5697 if (!DECL_INITIALIZED_P (decl)
5698 /* If !DECL_EXTERNAL then DECL is being defined. In the
5699 case of a static data member initialized inside the
5700 class-specifier, there can be an initializer even if DECL
5701 is *not* defined. */
5702 && (!DECL_EXTERNAL (decl) || init))
5704 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5707 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5708 /* Allow libjava/prims.cc define primitive classes. */
5709 if (init != NULL_TREE
5710 || jclass == NULL_TREE
5711 || TREE_CODE (jclass) != TYPE_DECL
5712 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5713 || !same_type_ignoring_top_level_qualifiers_p
5714 (type, TREE_TYPE (TREE_TYPE (jclass))))
5715 error ("Java object %qD not allocated with %<new%>", decl);
5720 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5721 if (init_const_expr_p)
5723 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5724 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5725 TREE_CONSTANT (decl) = 1;
5728 init = check_initializer (decl, init, flags, &cleanup);
5729 /* Thread-local storage cannot be dynamically initialized. */
5730 if (DECL_THREAD_LOCAL_P (decl) && init)
5732 error ("%qD is thread-local and so cannot be dynamically "
5733 "initialized", decl);
5737 /* Check that the initializer for a static data member was a
5738 constant. Although we check in the parser that the
5739 initializer is an integral constant expression, we do not
5740 simplify division-by-zero at the point at which it
5741 occurs. Therefore, in:
5743 struct S { static const int i = 7 / 0; };
5745 we issue an error at this point. It would
5746 probably be better to forbid division by zero in
5747 integral constant expressions. */
5748 if (DECL_EXTERNAL (decl) && init)
5750 error ("%qD cannot be initialized by a non-constant expression"
5751 " when being declared", decl);
5752 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5760 The memory occupied by any object of static storage
5761 duration is zero-initialized at program startup before
5762 any other initialization takes place.
5764 We cannot create an appropriate initializer until after
5765 the type of DECL is finalized. If DECL_INITIAL is set,
5766 then the DECL is statically initialized, and any
5767 necessary zero-initialization has already been performed. */
5768 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5769 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5770 /*nelts=*/NULL_TREE,
5771 /*static_storage_p=*/true);
5772 /* Remember that the initialization for this variable has
5774 DECL_INITIALIZED_P (decl) = 1;
5775 /* This declaration is the definition of this variable,
5776 unless we are initializing a static data member within
5777 the class specifier. */
5778 if (!DECL_EXTERNAL (decl))
5779 var_definition_p = true;
5781 /* If the variable has an array type, lay out the type, even if
5782 there is no initializer. It is valid to index through the
5783 array, and we must get TYPE_ALIGN set correctly on the array
5785 else if (TREE_CODE (type) == ARRAY_TYPE)
5788 if (!processing_template_decl
5789 && TREE_STATIC (decl)
5790 && !at_function_scope_p ()
5791 && current_function_decl == NULL)
5792 /* So decl is a global variable or a static member of a
5793 non local class. Record the types it uses
5794 so that we can decide later to emit debug info for them. */
5795 record_types_used_by_current_var_decl (decl);
5797 else if (TREE_CODE (decl) == FIELD_DECL
5798 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5799 error ("non-static data member %qD has Java class type", decl);
5801 /* Add this declaration to the statement-tree. This needs to happen
5802 after the call to check_initializer so that the DECL_EXPR for a
5803 reference temp is added before the DECL_EXPR for the reference itself. */
5804 if (at_function_scope_p ())
5805 add_decl_expr (decl);
5807 /* Let the middle end know about variables and functions -- but not
5808 static data members in uninstantiated class templates. */
5809 if (!saved_processing_template_decl
5810 && (TREE_CODE (decl) == VAR_DECL
5811 || TREE_CODE (decl) == FUNCTION_DECL))
5813 if (TREE_CODE (decl) == VAR_DECL)
5815 layout_var_decl (decl);
5816 maybe_commonize_var (decl);
5819 /* This needs to happen after the linkage is set. */
5820 determine_visibility (decl);
5822 if (var_definition_p && TREE_STATIC (decl))
5824 /* If a TREE_READONLY variable needs initialization
5825 at runtime, it is no longer readonly and we need to
5826 avoid MEM_READONLY_P being set on RTL created for it. */
5829 if (TREE_READONLY (decl))
5830 TREE_READONLY (decl) = 0;
5833 else if (was_readonly)
5834 TREE_READONLY (decl) = 1;
5837 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5839 /* Check for abstractness of the type. Notice that there is no
5840 need to strip array types here since the check for those types
5841 is already done within create_array_type_for_decl. */
5842 if (TREE_CODE (type) == FUNCTION_TYPE
5843 || TREE_CODE (type) == METHOD_TYPE)
5844 abstract_virtuals_error (decl, TREE_TYPE (type));
5846 abstract_virtuals_error (decl, type);
5848 if (TREE_TYPE (decl) == error_mark_node)
5849 /* No initialization required. */
5851 else if (TREE_CODE (decl) == FUNCTION_DECL)
5855 if (init == ridpointers[(int)RID_DEFAULT])
5857 /* An out-of-class default definition is defined at
5858 the point where it is explicitly defaulted. */
5859 if (DECL_INITIAL (decl) == error_mark_node)
5860 synthesize_method (decl);
5863 error ("function %q#D is initialized like a variable", decl);
5865 /* else no initialization required. */
5867 else if (DECL_EXTERNAL (decl)
5868 && ! (DECL_LANG_SPECIFIC (decl)
5869 && DECL_NOT_REALLY_EXTERN (decl)))
5872 DECL_INITIAL (decl) = init;
5874 /* A variable definition. */
5875 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5876 /* Initialize the local variable. */
5877 initialize_local_var (decl, init);
5879 /* If a variable is defined, and then a subsequent
5880 definition with external linkage is encountered, we will
5881 get here twice for the same variable. We want to avoid
5882 calling expand_static_init more than once. For variables
5883 that are not static data members, we can call
5884 expand_static_init only when we actually process the
5885 initializer. It is not legal to redeclare a static data
5886 member, so this issue does not arise in that case. */
5887 else if (var_definition_p && TREE_STATIC (decl))
5888 expand_static_init (decl, init);
5891 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5892 reference, insert it in the statement-tree now. */
5894 push_cleanup (decl, cleanup, false);
5897 processing_template_decl = saved_processing_template_decl;
5900 TREE_READONLY (decl) = 1;
5902 /* If this was marked 'used', be sure it will be output. */
5903 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5904 mark_decl_referenced (decl);
5907 /* This is here for a midend callback from c-common.c. */
5910 finish_decl (tree decl, tree init, tree asmspec_tree)
5912 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5915 /* Returns a declaration for a VAR_DECL as if:
5917 extern "C" TYPE NAME;
5919 had been seen. Used to create compiler-generated global
5923 declare_global_var (tree name, tree type)
5927 push_to_top_level ();
5928 decl = build_decl (VAR_DECL, name, type);
5929 TREE_PUBLIC (decl) = 1;
5930 DECL_EXTERNAL (decl) = 1;
5931 DECL_ARTIFICIAL (decl) = 1;
5932 /* If the user has explicitly declared this variable (perhaps
5933 because the code we are compiling is part of a low-level runtime
5934 library), then it is possible that our declaration will be merged
5935 with theirs by pushdecl. */
5936 decl = pushdecl (decl);
5937 finish_decl (decl, NULL_TREE, NULL_TREE);
5938 pop_from_top_level ();
5943 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5944 if "__cxa_atexit" is not being used) corresponding to the function
5945 to be called when the program exits. */
5948 get_atexit_fn_ptr_type (void)
5953 if (!atexit_fn_ptr_type_node)
5955 if (flag_use_cxa_atexit
5956 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5957 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5958 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5960 /* The parameter to "atexit" is "void (*)(void)". */
5961 arg_types = void_list_node;
5963 fn_type = build_function_type (void_type_node, arg_types);
5964 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5967 return atexit_fn_ptr_type_node;
5970 /* Returns a pointer to the `atexit' function. Note that if
5971 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5972 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5975 get_atexit_node (void)
5982 bool use_aeabi_atexit;
5987 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5989 /* The declaration for `__cxa_atexit' is:
5991 int __cxa_atexit (void (*)(void *), void *, void *)
5993 We build up the argument types and then then function type
5996 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5997 /* First, build the pointer-to-function type for the first
5999 fn_ptr_type = get_atexit_fn_ptr_type ();
6000 /* Then, build the rest of the argument types. */
6001 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6002 if (use_aeabi_atexit)
6004 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6005 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6009 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6010 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6012 /* And the final __cxa_atexit type. */
6013 fn_type = build_function_type (integer_type_node, arg_types);
6014 fn_ptr_type = build_pointer_type (fn_type);
6015 if (use_aeabi_atexit)
6016 name = "__aeabi_atexit";
6018 name = "__cxa_atexit";
6022 /* The declaration for `atexit' is:
6024 int atexit (void (*)());
6026 We build up the argument types and then then function type
6028 fn_ptr_type = get_atexit_fn_ptr_type ();
6029 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6030 /* Build the final atexit type. */
6031 fn_type = build_function_type (integer_type_node, arg_types);
6035 /* Now, build the function declaration. */
6036 push_lang_context (lang_name_c);
6037 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6038 mark_used (atexit_fndecl);
6039 pop_lang_context ();
6040 atexit_node = decay_conversion (atexit_fndecl);
6045 /* Returns the __dso_handle VAR_DECL. */
6048 get_dso_handle_node (void)
6050 if (dso_handle_node)
6051 return dso_handle_node;
6053 /* Declare the variable. */
6054 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6057 return dso_handle_node;
6060 /* Begin a new function with internal linkage whose job will be simply
6061 to destroy some particular variable. */
6063 static GTY(()) int start_cleanup_cnt;
6066 start_cleanup_fn (void)
6071 bool use_cxa_atexit = flag_use_cxa_atexit
6072 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6074 push_to_top_level ();
6076 /* No need to mangle this. */
6077 push_lang_context (lang_name_c);
6079 /* Build the name of the function. */
6080 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6081 /* Build the function declaration. */
6082 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6083 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6084 /* It's a function with internal linkage, generated by the
6086 TREE_PUBLIC (fndecl) = 0;
6087 DECL_ARTIFICIAL (fndecl) = 1;
6088 /* Make the function `inline' so that it is only emitted if it is
6089 actually needed. It is unlikely that it will be inlined, since
6090 it is only called via a function pointer, but we avoid unnecessary
6091 emissions this way. */
6092 DECL_DECLARED_INLINE_P (fndecl) = 1;
6093 DECL_INTERFACE_KNOWN (fndecl) = 1;
6094 /* Build the parameter. */
6099 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6100 DECL_CONTEXT (parmdecl) = fndecl;
6101 TREE_USED (parmdecl) = 1;
6102 DECL_ARGUMENTS (fndecl) = parmdecl;
6106 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6108 pop_lang_context ();
6110 return current_function_decl;
6113 /* Finish the cleanup function begun by start_cleanup_fn. */
6116 end_cleanup_fn (void)
6118 expand_or_defer_fn (finish_function (0));
6120 pop_from_top_level ();
6123 /* Generate code to handle the destruction of DECL, an object with
6124 static storage duration. */
6127 register_dtor_fn (tree decl)
6136 type = TREE_TYPE (decl);
6137 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6138 return void_zero_node;
6140 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6141 a class object, we can just pass the destructor to
6142 "__cxa_atexit"; we don't have to build a temporary function to do
6144 use_dtor = (flag_use_cxa_atexit
6145 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6146 && CLASS_TYPE_P (type));
6151 /* Find the destructor. */
6152 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6153 gcc_assert (idx >= 0);
6154 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6155 /* Make sure it is accessible. */
6156 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6160 /* Call build_cleanup before we enter the anonymous function so
6161 that any access checks will be done relative to the current
6162 scope, rather than the scope of the anonymous function. */
6163 build_cleanup (decl);
6165 /* Now start the function. */
6166 cleanup = start_cleanup_fn ();
6168 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6169 to the original function, rather than the anonymous one. That
6170 will make the back end think that nested functions are in use,
6171 which causes confusion. */
6172 push_deferring_access_checks (dk_no_check);
6173 fcall = build_cleanup (decl);
6174 pop_deferring_access_checks ();
6176 /* Create the body of the anonymous function. */
6177 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6178 finish_expr_stmt (fcall);
6179 finish_compound_stmt (compound_stmt);
6183 /* Call atexit with the cleanup function. */
6184 mark_used (cleanup);
6185 cleanup = build_address (cleanup);
6186 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6192 /* We must convert CLEANUP to the type that "__cxa_atexit"
6194 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6195 /* "__cxa_atexit" will pass the address of DECL to the
6196 cleanup function. */
6198 addr = build_address (decl);
6199 /* The declared type of the parameter to "__cxa_atexit" is
6200 "void *". For plain "T*", we could just let the
6201 machinery in cp_build_function_call convert it -- but if the
6202 type is "cv-qualified T *", then we need to convert it
6203 before passing it in, to avoid spurious errors. */
6204 addr = build_nop (ptr_type_node, addr);
6207 /* Since the cleanup functions we build ignore the address
6208 they're given, there's no reason to pass the actual address
6209 in, and, in general, it's cheaper to pass NULL than any
6211 addr = null_pointer_node;
6212 args = tree_cons (NULL_TREE,
6213 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6214 tf_warning_or_error),
6216 if (targetm.cxx.use_aeabi_atexit ())
6218 args = tree_cons (NULL_TREE, cleanup, args);
6219 args = tree_cons (NULL_TREE, addr, args);
6223 args = tree_cons (NULL_TREE, addr, args);
6224 args = tree_cons (NULL_TREE, cleanup, args);
6228 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6229 return cp_build_function_call (get_atexit_node (), args,
6230 tf_warning_or_error);
6233 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6234 is its initializer. Generate code to handle the construction
6235 and destruction of DECL. */
6238 expand_static_init (tree decl, tree init)
6240 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6241 gcc_assert (TREE_STATIC (decl));
6243 /* Some variables require no initialization. */
6245 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6246 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6249 if (DECL_FUNCTION_SCOPE_P (decl))
6251 /* Emit code to perform this initialization but once. */
6252 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6253 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6254 tree guard, guard_addr;
6255 tree acquire_fn, release_fn, abort_fn;
6258 /* Emit code to perform this initialization but once. This code
6261 static <type> guard;
6262 if (!guard.first_byte) {
6263 if (__cxa_guard_acquire (&guard)) {
6266 // Do initialization.
6267 flag = true; __cxa_guard_release (&guard);
6268 // Register variable for destruction at end of program.
6270 if (!flag) __cxa_guard_abort (&guard);
6274 Note that the `flag' variable is only set to 1 *after* the
6275 initialization is complete. This ensures that an exception,
6276 thrown during the construction, will cause the variable to
6277 reinitialized when we pass through this code again, as per:
6281 If the initialization exits by throwing an exception, the
6282 initialization is not complete, so it will be tried again
6283 the next time control enters the declaration.
6285 This process should be thread-safe, too; multiple threads
6286 should not be able to initialize the variable more than
6289 /* Create the guard variable. */
6290 guard = get_guard (decl);
6292 /* This optimization isn't safe on targets with relaxed memory
6293 consistency. On such targets we force synchronization in
6294 __cxa_guard_acquire. */
6295 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6297 /* Begin the conditional initialization. */
6298 if_stmt = begin_if_stmt ();
6299 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6300 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6303 if (flag_threadsafe_statics)
6305 guard_addr = build_address (guard);
6307 acquire_fn = get_identifier ("__cxa_guard_acquire");
6308 release_fn = get_identifier ("__cxa_guard_release");
6309 abort_fn = get_identifier ("__cxa_guard_abort");
6310 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6312 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6314 tree vfntype = build_function_type (void_type_node, argtypes);
6315 acquire_fn = push_library_fn
6316 (acquire_fn, build_function_type (integer_type_node, argtypes),
6318 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6319 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6323 release_fn = identifier_global_value (release_fn);
6324 abort_fn = identifier_global_value (abort_fn);
6327 inner_if_stmt = begin_if_stmt ();
6328 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6331 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6332 begin = get_target_expr (boolean_false_node);
6333 flag = TARGET_EXPR_SLOT (begin);
6335 TARGET_EXPR_CLEANUP (begin)
6336 = build3 (COND_EXPR, void_type_node, flag,
6338 build_call_n (abort_fn, 1, guard_addr));
6339 CLEANUP_EH_ONLY (begin) = 1;
6341 /* Do the initialization itself. */
6342 init = add_stmt_to_compound (begin, init);
6343 init = add_stmt_to_compound
6344 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6345 init = add_stmt_to_compound
6346 (init, build_call_n (release_fn, 1, guard_addr));
6349 init = add_stmt_to_compound (init, set_guard (guard));
6351 /* Use atexit to register a function for destroying this static
6353 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6355 finish_expr_stmt (init);
6357 if (flag_threadsafe_statics)
6359 finish_compound_stmt (inner_then_clause);
6360 finish_then_clause (inner_if_stmt);
6361 finish_if_stmt (inner_if_stmt);
6364 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6366 finish_compound_stmt (then_clause);
6367 finish_then_clause (if_stmt);
6368 finish_if_stmt (if_stmt);
6372 static_aggregates = tree_cons (init, decl, static_aggregates);
6376 /* Make TYPE a complete type based on INITIAL_VALUE.
6377 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6378 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6379 3 if the initializer list is empty (in pedantic mode). */
6382 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6385 tree type, elt_type;
6389 unsigned HOST_WIDE_INT i;
6392 /* An array of character type can be initialized from a
6393 brace-enclosed string constant.
6395 FIXME: this code is duplicated from reshape_init. Probably
6396 we should just call reshape_init here? */
6397 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6398 && TREE_CODE (initial_value) == CONSTRUCTOR
6399 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6401 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6402 tree value = VEC_index (constructor_elt, v, 0)->value;
6404 if (TREE_CODE (value) == STRING_CST
6405 && VEC_length (constructor_elt, v) == 1)
6406 initial_value = value;
6409 /* If any of the elements are parameter packs, we can't actually
6410 complete this type now because the array size is dependent. */
6411 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6413 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6416 if (PACK_EXPANSION_P (value))
6422 failure = complete_array_type (ptype, initial_value, do_default);
6424 /* We can create the array before the element type is complete, which
6425 means that we didn't have these two bits set in the original type
6426 either. In completing the type, we are expected to propagate these
6427 bits. See also complete_type which does the same thing for arrays
6430 if (TYPE_DOMAIN (type))
6432 elt_type = TREE_TYPE (type);
6433 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6434 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6435 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6441 /* Return zero if something is declared to be a member of type
6442 CTYPE when in the context of CUR_TYPE. STRING is the error
6443 message to print in that case. Otherwise, quietly return 1. */
6446 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6448 if (ctype && ctype != cur_type)
6450 if (flags == DTOR_FLAG)
6451 error ("destructor for alien class %qT cannot be a member", ctype);
6453 error ("constructor for alien class %qT cannot be a member", ctype);
6459 /* Subroutine of `grokdeclarator'. */
6461 /* Generate errors possibly applicable for a given set of specifiers.
6462 This is for ARM $7.1.2. */
6465 bad_specifiers (tree object,
6474 error ("%qD declared as a %<virtual%> %s", object, type);
6476 error ("%qD declared as an %<inline%> %s", object, type);
6478 error ("%<const%> and %<volatile%> function specifiers on "
6479 "%qD invalid in %s declaration",
6482 error ("%q+D declared as a friend", object);
6484 && (TREE_CODE (object) == TYPE_DECL
6485 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6486 && !TYPE_REFFN_P (TREE_TYPE (object))
6487 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6488 error ("%q+D declared with an exception specification", object);
6491 /* DECL is a member function or static data member and is presently
6492 being defined. Check that the definition is taking place in a
6496 check_class_member_definition_namespace (tree decl)
6498 /* These checks only apply to member functions and static data
6500 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6501 || TREE_CODE (decl) == VAR_DECL);
6502 /* We check for problems with specializations in pt.c in
6503 check_specialization_namespace, where we can issue better
6505 if (processing_specialization)
6507 /* There are no restrictions on the placement of
6508 explicit instantiations. */
6509 if (processing_explicit_instantiation)
6513 A member function definition that appears outside of the
6514 class definition shall appear in a namespace scope enclosing
6515 the class definition.
6519 The definition for a static data member shall appear in a
6520 namespace scope enclosing the member's class definition. */
6521 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6522 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6523 decl, DECL_CONTEXT (decl));
6526 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6527 METHOD_TYPE for a non-static member function; QUALS are the
6528 cv-qualifiers that apply to the function. */
6531 build_this_parm (tree type, cp_cv_quals quals)
6536 cp_cv_quals this_quals;
6538 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6539 /* The `this' parameter is implicitly `const'; it cannot be
6541 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6542 qual_type = cp_build_qualified_type (this_type, this_quals);
6543 parm = build_artificial_parm (this_identifier, qual_type);
6544 cp_apply_type_quals_to_decl (this_quals, parm);
6548 /* CTYPE is class type, or null if non-class.
6549 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6551 DECLARATOR is the function's name.
6552 PARMS is a chain of PARM_DECLs for the function.
6553 VIRTUALP is truthvalue of whether the function is virtual or not.
6554 FLAGS are to be passed through to `grokclassfn'.
6555 QUALS are qualifiers indicating whether the function is `const'
6557 RAISES is a list of exceptions that this function can raise.
6558 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6559 not look, and -1 if we should not call `grokclassfn' at all.
6561 SFK is the kind of special function (if any) for the new function.
6563 Returns `NULL_TREE' if something goes wrong, after issuing
6564 applicable error messages. */
6567 grokfndecl (tree ctype,
6571 tree orig_declarator,
6573 enum overload_flags flags,
6580 special_function_kind sfk,
6585 location_t location)
6588 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6592 type = build_exception_variant (type, raises);
6594 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6596 /* If we have an explicit location, use it, otherwise use whatever
6597 build_lang_decl used (probably input_location). */
6598 if (location != UNKNOWN_LOCATION)
6599 DECL_SOURCE_LOCATION (decl) = location;
6601 if (TREE_CODE (type) == METHOD_TYPE)
6604 parm = build_this_parm (type, quals);
6605 TREE_CHAIN (parm) = parms;
6608 DECL_ARGUMENTS (decl) = parms;
6609 for (t = parms; t; t = TREE_CHAIN (t))
6610 DECL_CONTEXT (t) = decl;
6611 /* Propagate volatile out from type to decl. */
6612 if (TYPE_VOLATILE (type))
6613 TREE_THIS_VOLATILE (decl) = 1;
6615 /* Setup decl according to sfk. */
6618 case sfk_constructor:
6619 case sfk_copy_constructor:
6620 DECL_CONSTRUCTOR_P (decl) = 1;
6622 case sfk_destructor:
6623 DECL_DESTRUCTOR_P (decl) = 1;
6629 /* If pointers to member functions use the least significant bit to
6630 indicate whether a function is virtual, ensure a pointer
6631 to this function will have that bit clear. */
6632 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6633 && TREE_CODE (type) == METHOD_TYPE
6634 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6635 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6638 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6642 ("defining explicit specialization %qD in friend declaration",
6646 tree fns = TREE_OPERAND (orig_declarator, 0);
6647 tree args = TREE_OPERAND (orig_declarator, 1);
6649 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6651 /* Something like `template <class T> friend void f<T>()'. */
6652 error ("invalid use of template-id %qD in declaration "
6653 "of primary template",
6659 /* A friend declaration of the form friend void f<>(). Record
6660 the information in the TEMPLATE_ID_EXPR. */
6661 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6663 if (TREE_CODE (fns) == COMPONENT_REF)
6665 /* Due to bison parser ickiness, we will have already looked
6666 up an operator_name or PFUNCNAME within the current class
6667 (see template_id in parse.y). If the current class contains
6668 such a name, we'll get a COMPONENT_REF here. Undo that. */
6670 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6671 == current_class_type);
6672 fns = TREE_OPERAND (fns, 1);
6674 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6675 || TREE_CODE (fns) == OVERLOAD);
6676 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6678 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6679 if (TREE_PURPOSE (t)
6680 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6682 error ("default arguments are not allowed in declaration "
6683 "of friend template specialization %qD",
6690 error ("%<inline%> is not allowed in declaration of friend "
6691 "template specialization %qD",
6698 /* If this decl has namespace scope, set that up. */
6700 set_decl_namespace (decl, in_namespace, friendp);
6702 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6704 /* `main' and builtins have implicit 'C' linkage. */
6705 if ((MAIN_NAME_P (declarator)
6706 || (IDENTIFIER_LENGTH (declarator) > 10
6707 && IDENTIFIER_POINTER (declarator)[0] == '_'
6708 && IDENTIFIER_POINTER (declarator)[1] == '_'
6709 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6710 && current_lang_name == lang_name_cplusplus
6711 && ctype == NULL_TREE
6712 /* NULL_TREE means global namespace. */
6713 && DECL_CONTEXT (decl) == NULL_TREE)
6714 SET_DECL_LANGUAGE (decl, lang_c);
6716 /* Should probably propagate const out from type to decl I bet (mrs). */
6719 DECL_STATIC_FUNCTION_P (decl) = 1;
6720 DECL_CONTEXT (decl) = ctype;
6725 DECL_CONTEXT (decl) = ctype;
6727 check_class_member_definition_namespace (decl);
6730 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6732 if (processing_template_decl)
6733 error ("cannot declare %<::main%> to be a template");
6735 error ("cannot declare %<::main%> to be inline");
6737 error ("cannot declare %<::main%> to be static");
6742 /* Members of anonymous types and local classes have no linkage; make
6743 them internal. If a typedef is made later, this will be changed. */
6744 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6745 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6750 /* [basic.link]: A name with no linkage (notably, the name of a class
6751 or enumeration declared in a local scope) shall not be used to
6752 declare an entity with linkage.
6754 Only check this for public decls for now. See core 319, 389. */
6755 t = no_linkage_check (TREE_TYPE (decl),
6756 /*relaxed_p=*/false);
6759 if (TYPE_ANONYMOUS_P (t))
6761 if (DECL_EXTERN_C_P (decl))
6762 /* Allow this; it's pretty common in C. */;
6765 permerror (input_location, "non-local function %q#D uses anonymous type",
6767 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6768 permerror (input_location, "%q+#D does not refer to the unqualified "
6769 "type, so it is not used for linkage",
6774 permerror (input_location, "non-local function %q#D uses local type %qT", decl, t);
6778 TREE_PUBLIC (decl) = publicp;
6781 DECL_INTERFACE_KNOWN (decl) = 1;
6782 DECL_NOT_REALLY_EXTERN (decl) = 1;
6785 /* If the declaration was declared inline, mark it as such. */
6787 DECL_DECLARED_INLINE_P (decl) = 1;
6789 DECL_EXTERNAL (decl) = 1;
6790 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6793 ? G_("static member function %qD cannot have cv-qualifier")
6794 : G_("non-member function %qD cannot have cv-qualifier"),
6796 quals = TYPE_UNQUALIFIED;
6799 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6800 && !grok_op_properties (decl, /*complain=*/true))
6803 if (ctype && decl_function_context (decl))
6804 DECL_NO_STATIC_CHAIN (decl) = 1;
6807 /* Make the init_value nonzero so pushdecl knows this is not
6808 tentative. error_mark_node is replaced later with the BLOCK. */
6809 DECL_INITIAL (decl) = error_mark_node;
6811 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6812 TREE_NOTHROW (decl) = 1;
6814 /* Caller will do the rest of this. */
6818 if (ctype != NULL_TREE)
6819 grokclassfn (ctype, decl, flags);
6821 decl = check_explicit_specialization (orig_declarator, decl,
6824 4 * (friendp != 0));
6825 if (decl == error_mark_node)
6830 cplus_decl_attributes (&decl, *attrlist, 0);
6831 *attrlist = NULL_TREE;
6834 /* Check main's type after attributes have been applied. */
6835 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6837 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6840 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6842 error ("%<::main%> must return %<int%>");
6843 newtype = build_function_type (integer_type_node, oldtypeargs);
6844 TREE_TYPE (decl) = newtype;
6847 check_main_parameter_types (decl);
6850 if (ctype != NULL_TREE
6851 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6854 tree old_decl = check_classfn (ctype, decl,
6855 (processing_template_decl
6856 > template_class_depth (ctype))
6857 ? current_template_parms
6860 if (old_decl == error_mark_node)
6868 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6869 /* Because grokfndecl is always supposed to return a
6870 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6871 here. We depend on our callers to figure out that its
6872 really a template that's being returned. */
6873 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6875 if (DECL_STATIC_FUNCTION_P (old_decl)
6876 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6877 /* Remove the `this' parm added by grokclassfn.
6878 XXX Isn't this done in start_function, too? */
6879 revert_static_member_fn (decl);
6880 if (DECL_ARTIFICIAL (old_decl))
6882 error ("definition of implicitly-declared %qD", old_decl);
6886 /* Since we've smashed OLD_DECL to its
6887 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6888 if (TREE_CODE (decl) == TEMPLATE_DECL)
6889 decl = DECL_TEMPLATE_RESULT (decl);
6891 /* Attempt to merge the declarations. This can fail, in
6892 the case of some invalid specialization declarations. */
6893 pushed_scope = push_scope (ctype);
6894 ok = duplicate_decls (decl, old_decl, friendp);
6896 pop_scope (pushed_scope);
6899 error ("no %q#D member function declared in class %qT",
6907 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6910 if (ctype == NULL_TREE || check)
6914 DECL_VIRTUAL_P (decl) = 1;
6919 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6920 the linkage that DECL will receive in the object file. */
6923 set_linkage_for_static_data_member (tree decl)
6925 /* A static data member always has static storage duration and
6926 external linkage. Note that static data members are forbidden in
6927 local classes -- the only situation in which a class has
6928 non-external linkage. */
6929 TREE_PUBLIC (decl) = 1;
6930 TREE_STATIC (decl) = 1;
6931 /* For non-template classes, static data members are always put
6932 out in exactly those files where they are defined, just as
6933 with ordinary namespace-scope variables. */
6934 if (!processing_template_decl)
6935 DECL_INTERFACE_KNOWN (decl) = 1;
6938 /* Create a VAR_DECL named NAME with the indicated TYPE.
6940 If SCOPE is non-NULL, it is the class type or namespace containing
6941 the variable. If SCOPE is NULL, the variable should is created in
6942 the innermost enclosings scope. */
6945 grokvardecl (tree type,
6947 const cp_decl_specifier_seq *declspecs,
6953 tree explicit_scope;
6955 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6957 /* Compute the scope in which to place the variable, but remember
6958 whether or not that scope was explicitly specified by the user. */
6959 explicit_scope = scope;
6962 /* An explicit "extern" specifier indicates a namespace-scope
6964 if (declspecs->storage_class == sc_extern)
6965 scope = current_namespace;
6966 else if (!at_function_scope_p ())
6967 scope = current_scope ();
6971 && (/* If the variable is a namespace-scope variable declared in a
6972 template, we need DECL_LANG_SPECIFIC. */
6973 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6974 /* Similarly for namespace-scope variables with language linkage
6976 || (TREE_CODE (scope) == NAMESPACE_DECL
6977 && current_lang_name != lang_name_cplusplus)
6978 /* Similarly for static data members. */
6980 decl = build_lang_decl (VAR_DECL, name, type);
6982 decl = build_decl (VAR_DECL, name, type);
6984 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6985 set_decl_namespace (decl, explicit_scope, 0);
6987 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6989 if (declspecs->storage_class == sc_extern)
6991 DECL_THIS_EXTERN (decl) = 1;
6992 DECL_EXTERNAL (decl) = !initialized;
6995 if (DECL_CLASS_SCOPE_P (decl))
6997 set_linkage_for_static_data_member (decl);
6998 /* This function is only called with out-of-class definitions. */
6999 DECL_EXTERNAL (decl) = 0;
7000 check_class_member_definition_namespace (decl);
7002 /* At top level, either `static' or no s.c. makes a definition
7003 (perhaps tentative), and absence of `static' makes it public. */
7004 else if (toplevel_bindings_p ())
7006 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7007 && (DECL_THIS_EXTERN (decl) || ! constp));
7008 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7010 /* Not at top level, only `static' makes a static definition. */
7013 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7014 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7017 if (declspecs->specs[(int)ds_thread])
7018 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7020 if (TREE_PUBLIC (decl))
7022 /* [basic.link]: A name with no linkage (notably, the name of a class
7023 or enumeration declared in a local scope) shall not be used to
7024 declare an entity with linkage.
7026 Only check this for public decls for now. */
7027 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
7030 if (TYPE_ANONYMOUS_P (t))
7032 if (DECL_EXTERN_C_P (decl))
7033 /* Allow this; it's pretty common in C. */
7037 /* DRs 132, 319 and 389 seem to indicate types with
7038 no linkage can only be used to declare extern "C"
7039 entities. Since it's not always an error in the
7040 ISO C++ 90 Standard, we only issue a warning. */
7041 warning (0, "non-local variable %q#D uses anonymous type",
7043 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7044 warning (0, "%q+#D does not refer to the unqualified "
7045 "type, so it is not used for linkage",
7050 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
7054 DECL_INTERFACE_KNOWN (decl) = 1;
7059 /* Create and return a canonical pointer to member function type, for
7060 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7063 build_ptrmemfunc_type (tree type)
7067 tree unqualified_variant = NULL_TREE;
7069 if (type == error_mark_node)
7072 /* If a canonical type already exists for this type, use it. We use
7073 this method instead of type_hash_canon, because it only does a
7074 simple equality check on the list of field members. */
7076 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7079 /* Make sure that we always have the unqualified pointer-to-member
7081 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7083 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7085 t = make_class_type (RECORD_TYPE);
7086 xref_basetypes (t, NULL_TREE);
7088 /* Let the front end know this is a pointer to member function... */
7089 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7090 /* ... and not really a class type. */
7091 SET_CLASS_TYPE_P (t, 0);
7093 field = build_decl (FIELD_DECL, pfn_identifier, type);
7096 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
7097 TREE_CHAIN (field) = fields;
7100 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7102 /* Zap out the name so that the back end will give us the debugging
7103 information for this anonymous RECORD_TYPE. */
7104 TYPE_NAME (t) = NULL_TREE;
7106 /* If this is not the unqualified form of this pointer-to-member
7107 type, set the TYPE_MAIN_VARIANT for this type to be the
7108 unqualified type. Since they are actually RECORD_TYPEs that are
7109 not variants of each other, we must do this manually. */
7110 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7112 t = build_qualified_type (t, cp_type_quals (type));
7113 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7114 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7115 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7116 TREE_TYPE (TYPE_BINFO (t)) = t;
7119 /* Cache this pointer-to-member type so that we can find it again
7121 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7123 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7124 SET_TYPE_STRUCTURAL_EQUALITY (t);
7125 else if (TYPE_CANONICAL (type) != type)
7126 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7131 /* Create and return a pointer to data member type. */
7134 build_ptrmem_type (tree class_type, tree member_type)
7136 if (TREE_CODE (member_type) == METHOD_TYPE)
7138 tree arg_types = TYPE_ARG_TYPES (member_type);
7139 cp_cv_quals quals = cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)));
7140 member_type = build_memfn_type (member_type, class_type, quals);
7141 return build_ptrmemfunc_type (build_pointer_type (member_type));
7145 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7146 return build_offset_type (class_type, member_type);
7150 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7151 Check to see that the definition is valid. Issue appropriate error
7152 messages. Return 1 if the definition is particularly bad, or 0
7156 check_static_variable_definition (tree decl, tree type)
7158 /* Motion 10 at San Diego: If a static const integral data member is
7159 initialized with an integral constant expression, the initializer
7160 may appear either in the declaration (within the class), or in
7161 the definition, but not both. If it appears in the class, the
7162 member is a member constant. The file-scope definition is always
7164 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7166 error ("invalid in-class initialization of static data member "
7167 "of non-integral type %qT",
7169 /* If we just return the declaration, crashes will sometimes
7170 occur. We therefore return void_type_node, as if this were a
7171 friend declaration, to cause callers to completely ignore
7172 this declaration. */
7175 else if (!CP_TYPE_CONST_P (type))
7176 error ("ISO C++ forbids in-class initialization of non-const "
7177 "static member %qD",
7179 else if (!INTEGRAL_TYPE_P (type))
7180 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7181 "%qD of non-integral type %qT", decl, type);
7186 /* Given the SIZE (i.e., number of elements) in an array, compute an
7187 appropriate index type for the array. If non-NULL, NAME is the
7188 name of the thing being declared. */
7191 compute_array_index_type (tree name, tree size)
7195 tree abi_1_itype = NULL_TREE;
7197 if (error_operand_p (size))
7198 return error_mark_node;
7200 type = TREE_TYPE (size);
7201 /* The array bound must be an integer type. */
7202 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
7205 error ("size of array %qD has non-integral type %qT", name, type);
7207 error ("size of array has non-integral type %qT", type);
7208 size = integer_one_node;
7209 type = TREE_TYPE (size);
7212 /* We can only call value_dependent_expression_p on integral constant
7213 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7214 set if this isn't one. */
7215 if (processing_template_decl
7216 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7218 /* We cannot do any checking for a SIZE that isn't known to be
7219 constant. Just build the index type and mark that it requires
7220 structural equality checks. */
7221 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7222 size, integer_one_node));
7223 TYPE_DEPENDENT_P (itype) = 1;
7224 TYPE_DEPENDENT_P_VALID (itype) = 1;
7225 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7229 if (!abi_version_at_least (2) && processing_template_decl)
7230 /* For abi-1, we handled all instances in templates the same way,
7231 even when they were non-dependent. This affects the manglings
7232 produced. So, we do the normal checking for non-dependent
7233 sizes, but at the end we'll return the same type that abi-1
7234 would have, but with TYPE_CANONICAL set to the "right"
7235 value that the current ABI would provide. */
7236 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7237 size, integer_one_node));
7239 /* The size might be the result of a cast. */
7240 STRIP_TYPE_NOPS (size);
7242 /* It might be a const variable or enumeration constant. */
7243 size = integral_constant_value (size);
7245 /* Normally, the array-bound will be a constant. */
7246 if (TREE_CODE (size) == INTEGER_CST)
7248 /* Check to see if the array bound overflowed. Make that an
7249 error, no matter how generous we're being. */
7250 constant_expression_error (size);
7252 /* An array must have a positive number of elements. */
7253 if (INT_CST_LT (size, integer_zero_node))
7256 error ("size of array %qD is negative", name);
7258 error ("size of array is negative");
7259 size = integer_one_node;
7261 /* As an extension we allow zero-sized arrays. We always allow
7262 them in system headers because glibc uses them. */
7263 else if (integer_zerop (size) && !in_system_header)
7266 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7268 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7271 else if (TREE_CONSTANT (size))
7273 /* `(int) &fn' is not a valid array bound. */
7275 error ("size of array %qD is not an integral constant-expression",
7278 error ("size of array is not an integral constant-expression");
7279 size = integer_one_node;
7281 else if (pedantic && warn_vla != 0)
7284 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7286 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7288 else if (warn_vla > 0)
7292 "variable length array %qD is used", name);
7295 "variable length array is used");
7298 if (processing_template_decl && !TREE_CONSTANT (size))
7299 /* A variable sized array. */
7300 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7303 HOST_WIDE_INT saved_processing_template_decl;
7305 /* Compute the index of the largest element in the array. It is
7306 one less than the number of elements in the array. We save
7307 and restore PROCESSING_TEMPLATE_DECL so that computations in
7308 cp_build_binary_op will be appropriately folded. */
7309 saved_processing_template_decl = processing_template_decl;
7310 processing_template_decl = 0;
7311 itype = cp_build_binary_op (input_location,
7313 cp_convert (ssizetype, size),
7314 cp_convert (ssizetype, integer_one_node),
7315 tf_warning_or_error);
7316 itype = fold (itype);
7317 processing_template_decl = saved_processing_template_decl;
7319 if (!TREE_CONSTANT (itype))
7320 /* A variable sized array. */
7321 itype = variable_size (itype);
7322 /* Make sure that there was no overflow when creating to a signed
7323 index type. (For example, on a 32-bit machine, an array with
7324 size 2^32 - 1 is too big.) */
7325 else if (TREE_CODE (itype) == INTEGER_CST
7326 && TREE_OVERFLOW (itype))
7328 error ("overflow in array dimension");
7329 TREE_OVERFLOW (itype) = 0;
7333 /* Create and return the appropriate index type. */
7336 tree t = build_index_type (itype);
7337 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7341 return build_index_type (itype);
7344 /* Returns the scope (if any) in which the entity declared by
7345 DECLARATOR will be located. If the entity was declared with an
7346 unqualified name, NULL_TREE is returned. */
7349 get_scope_of_declarator (const cp_declarator *declarator)
7351 while (declarator && declarator->kind != cdk_id)
7352 declarator = declarator->declarator;
7354 /* If the declarator-id is a SCOPE_REF, the scope in which the
7355 declaration occurs is the first operand. */
7357 && declarator->u.id.qualifying_scope)
7358 return declarator->u.id.qualifying_scope;
7360 /* Otherwise, the declarator is not a qualified name; the entity will
7361 be declared in the current scope. */
7365 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7366 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7370 create_array_type_for_decl (tree name, tree type, tree size)
7372 tree itype = NULL_TREE;
7373 const char* error_msg;
7375 /* If things have already gone awry, bail now. */
7376 if (type == error_mark_node || size == error_mark_node)
7377 return error_mark_node;
7379 /* Assume that everything will go OK. */
7382 /* There are some types which cannot be array elements. */
7383 switch (TREE_CODE (type))
7386 error_msg = "array of void";
7390 error_msg = "array of functions";
7393 case REFERENCE_TYPE:
7394 error_msg = "array of references";
7398 error_msg = "array of function members";
7405 /* If something went wrong, issue an error-message and return. */
7409 error ("declaration of %qD as %s", name, error_msg);
7411 error ("creating %s", error_msg);
7413 return error_mark_node;
7418 The constant expressions that specify the bounds of the arrays
7419 can be omitted only for the first member of the sequence. */
7420 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7423 error ("declaration of %qD as multidimensional array must "
7424 "have bounds for all dimensions except the first",
7427 error ("multidimensional array must have bounds for all "
7428 "dimensions except the first");
7430 return error_mark_node;
7433 /* Figure out the index type for the array. */
7435 itype = compute_array_index_type (name, size);
7438 T is called the array element type; this type shall not be [...] an
7439 abstract class type. */
7440 abstract_virtuals_error (name, type);
7442 return build_cplus_array_type (type, itype);
7445 /* Check that it's OK to declare a function with the indicated TYPE.
7446 SFK indicates the kind of special function (if any) that this
7447 function is. OPTYPE is the type given in a conversion operator
7448 declaration, or the class type for a constructor/destructor.
7449 Returns the actual return type of the function; that
7450 may be different than TYPE if an error occurs, or for certain
7451 special functions. */
7454 check_special_function_return_type (special_function_kind sfk,
7460 case sfk_constructor:
7462 error ("return type specification for constructor invalid");
7464 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7465 type = build_pointer_type (optype);
7467 type = void_type_node;
7470 case sfk_destructor:
7472 error ("return type specification for destructor invalid");
7473 /* We can't use the proper return type here because we run into
7474 problems with ambiguous bases and covariant returns.
7475 Java classes are left unchanged because (void *) isn't a valid
7476 Java type, and we don't want to change the Java ABI. */
7477 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7478 type = build_pointer_type (void_type_node);
7480 type = void_type_node;
7483 case sfk_conversion:
7485 error ("return type specified for %<operator %T%>", optype);
7496 /* A variable or data member (whose unqualified name is IDENTIFIER)
7497 has been declared with the indicated TYPE. If the TYPE is not
7498 acceptable, issue an error message and return a type to use for
7499 error-recovery purposes. */
7502 check_var_type (tree identifier, tree type)
7504 if (VOID_TYPE_P (type))
7507 error ("unnamed variable or field declared void");
7508 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7510 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7511 error ("variable or field %qE declared void", identifier);
7514 error ("variable or field declared void");
7515 type = error_mark_node;
7521 /* Given declspecs and a declarator (abstract or otherwise), determine
7522 the name and type of the object declared and construct a DECL node
7525 DECLSPECS points to the representation of declaration-specifier
7526 sequence that precedes declarator.
7528 DECL_CONTEXT says which syntactic context this declaration is in:
7529 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7530 FUNCDEF for a function definition. Like NORMAL but a few different
7531 error messages in each case. Return value may be zero meaning
7532 this definition is too screwy to try to parse.
7533 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7534 handle member functions (which have FIELD context).
7535 Return value may be zero meaning this definition is too screwy to
7537 PARM for a parameter declaration (either within a function prototype
7538 or before a function body). Make a PARM_DECL, or return void_type_node.
7539 CATCHPARM for a parameter declaration before a catch clause.
7540 TYPENAME if for a typename (in a cast or sizeof).
7541 Don't make a DECL node; just return the ..._TYPE node.
7542 FIELD for a struct or union field; make a FIELD_DECL.
7543 BITFIELD for a field with specified width.
7544 INITIALIZED is as for start_decl.
7546 ATTRLIST is a pointer to the list of attributes, which may be NULL
7547 if there are none; *ATTRLIST may be modified if attributes from inside
7548 the declarator should be applied to the declaration.
7550 When this function is called, scoping variables (such as
7551 CURRENT_CLASS_TYPE) should reflect the scope in which the
7552 declaration occurs, not the scope in which the new declaration will
7553 be placed. For example, on:
7557 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7560 Returns a DECL (if a declarator is present), a TYPE (if there is no
7561 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7565 grokdeclarator (const cp_declarator *declarator,
7566 const cp_decl_specifier_seq *declspecs,
7567 enum decl_context decl_context,
7571 tree type = NULL_TREE;
7573 int virtualp, explicitp, friendp, inlinep, staticp;
7574 int explicit_int = 0;
7575 int explicit_char = 0;
7576 int defaulted_int = 0;
7577 tree dependent_name = NULL_TREE;
7579 tree typedef_decl = NULL_TREE;
7580 const char *name = NULL;
7581 tree typedef_type = NULL_TREE;
7582 /* True if this declarator is a function definition. */
7583 bool funcdef_flag = false;
7584 cp_declarator_kind innermost_code = cdk_error;
7587 /* See the code below that used this. */
7588 tree decl_attr = NULL_TREE;
7591 /* Keep track of what sort of function is being processed
7592 so that we can warn about default return values, or explicit
7593 return values which do not match prescribed defaults. */
7594 special_function_kind sfk = sfk_none;
7596 tree dname = NULL_TREE;
7597 tree ctor_return_type = NULL_TREE;
7598 enum overload_flags flags = NO_SPECIAL;
7599 /* cv-qualifiers that apply to the declarator, for a declaration of
7600 a member function. */
7601 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7602 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7604 tree raises = NULL_TREE;
7605 int template_count = 0;
7606 tree returned_attrs = NULL_TREE;
7607 tree parms = NULL_TREE;
7608 const cp_declarator *id_declarator;
7609 /* The unqualified name of the declarator; either an
7610 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7611 tree unqualified_id;
7612 /* The class type, if any, in which this entity is located,
7613 or NULL_TREE if none. Note that this value may be different from
7614 the current class type; for example if an attempt is made to declare
7615 "A::f" inside "B", this value will be "A". */
7616 tree ctype = current_class_type;
7617 /* The NAMESPACE_DECL for the namespace in which this entity is
7618 located. If an unqualified name is used to declare the entity,
7619 this value will be NULL_TREE, even if the entity is located at
7621 tree in_namespace = NULL_TREE;
7622 cp_storage_class storage_class;
7623 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7624 bool type_was_error_mark_node = false;
7625 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7626 bool template_type_arg = false;
7628 signed_p = declspecs->specs[(int)ds_signed];
7629 unsigned_p = declspecs->specs[(int)ds_unsigned];
7630 short_p = declspecs->specs[(int)ds_short];
7631 long_p = declspecs->specs[(int)ds_long];
7632 longlong = declspecs->specs[(int)ds_long] >= 2;
7633 thread_p = declspecs->specs[(int)ds_thread];
7635 if (decl_context == FUNCDEF)
7636 funcdef_flag = true, decl_context = NORMAL;
7637 else if (decl_context == MEMFUNCDEF)
7638 funcdef_flag = true, decl_context = FIELD;
7639 else if (decl_context == BITFIELD)
7640 bitfield = 1, decl_context = FIELD;
7641 else if (decl_context == TEMPLATE_TYPE_ARG)
7642 template_type_arg = true, decl_context = TYPENAME;
7644 if (initialized > 1)
7645 funcdef_flag = true;
7647 /* Look inside a declarator for the name being declared
7648 and get it as a string, for an error message. */
7649 for (id_declarator = declarator;
7651 id_declarator = id_declarator->declarator)
7653 if (id_declarator->kind != cdk_id)
7654 innermost_code = id_declarator->kind;
7656 switch (id_declarator->kind)
7659 if (id_declarator->declarator
7660 && id_declarator->declarator->kind == cdk_id)
7662 sfk = id_declarator->declarator->u.id.sfk;
7663 if (sfk == sfk_destructor)
7670 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7671 tree decl = id_declarator->u.id.unqualified_name;
7674 if (qualifying_scope)
7676 if (at_function_scope_p ())
7680 A declarator-id shall not be qualified except
7683 None of the cases are permitted in block
7685 if (qualifying_scope == global_namespace)
7686 error ("invalid use of qualified-name %<::%D%>",
7688 else if (TYPE_P (qualifying_scope))
7689 error ("invalid use of qualified-name %<%T::%D%>",
7690 qualifying_scope, decl);
7692 error ("invalid use of qualified-name %<%D::%D%>",
7693 qualifying_scope, decl);
7694 return error_mark_node;
7696 else if (TYPE_P (qualifying_scope))
7698 ctype = qualifying_scope;
7699 if (innermost_code != cdk_function
7700 && current_class_type
7701 && !UNIQUELY_DERIVED_FROM_P (ctype,
7702 current_class_type))
7704 error ("type %qT is not derived from type %qT",
7705 ctype, current_class_type);
7706 return error_mark_node;
7709 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7710 in_namespace = qualifying_scope;
7712 switch (TREE_CODE (decl))
7718 if (innermost_code != cdk_function)
7720 error ("declaration of %qD as non-function", decl);
7721 return error_mark_node;
7723 else if (!qualifying_scope
7724 && !(current_class_type && at_class_scope_p ()))
7726 error ("declaration of %qD as non-member", decl);
7727 return error_mark_node;
7730 type = TREE_OPERAND (decl, 0);
7732 type = constructor_name (type);
7733 name = IDENTIFIER_POINTER (type);
7738 case TEMPLATE_ID_EXPR:
7740 tree fns = TREE_OPERAND (decl, 0);
7743 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7745 gcc_assert (is_overloaded_fn (dname));
7746 dname = DECL_NAME (get_first_fn (dname));
7751 case IDENTIFIER_NODE:
7752 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7755 if (C_IS_RESERVED_WORD (dname))
7757 error ("declarator-id missing; using reserved word %qD",
7759 name = IDENTIFIER_POINTER (dname);
7761 else if (!IDENTIFIER_TYPENAME_P (dname))
7762 name = IDENTIFIER_POINTER (dname);
7765 gcc_assert (flags == NO_SPECIAL);
7766 flags = TYPENAME_FLAG;
7767 ctor_return_type = TREE_TYPE (dname);
7768 sfk = sfk_conversion;
7769 if (is_typename_at_global_scope (dname))
7770 name = IDENTIFIER_POINTER (dname);
7772 name = "<invalid operator>";
7789 return error_mark_node;
7794 if (id_declarator->kind == cdk_id)
7800 The declarator in a function-definition shall have the form
7801 D1 ( parameter-declaration-clause) ... */
7802 if (funcdef_flag && innermost_code != cdk_function)
7804 error ("function definition does not declare parameters");
7805 return error_mark_node;
7808 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7809 && innermost_code != cdk_function
7810 && ! (ctype && !declspecs->any_specifiers_p))
7812 error ("declaration of %qD as non-function", dname);
7813 return error_mark_node;
7816 /* Anything declared one level down from the top level
7817 must be one of the parameters of a function
7818 (because the body is at least two levels down). */
7820 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7821 by not allowing C++ class definitions to specify their parameters
7822 with xdecls (must be spec.d in the parmlist).
7824 Since we now wait to push a class scope until we are sure that
7825 we are in a legitimate method context, we must set oldcname
7826 explicitly (since current_class_name is not yet alive).
7828 We also want to avoid calling this a PARM if it is in a namespace. */
7830 if (decl_context == NORMAL && !toplevel_bindings_p ())
7832 struct cp_binding_level *b = current_binding_level;
7833 current_binding_level = b->level_chain;
7834 if (current_binding_level != 0 && toplevel_bindings_p ())
7835 decl_context = PARM;
7836 current_binding_level = b;
7840 name = decl_context == PARM ? "parameter" : "type name";
7842 /* If there were multiple types specified in the decl-specifier-seq,
7843 issue an error message. */
7844 if (declspecs->multiple_types_p)
7846 error ("two or more data types in declaration of %qs", name);
7847 return error_mark_node;
7850 if (declspecs->conflicting_specifiers_p)
7852 error ("conflicting specifiers in declaration of %qs", name);
7853 return error_mark_node;
7856 /* Extract the basic type from the decl-specifier-seq. */
7857 type = declspecs->type;
7858 if (type == error_mark_node)
7861 type_was_error_mark_node = true;
7863 /* If the entire declaration is itself tagged as deprecated then
7864 suppress reports of deprecated items. */
7865 if (type && TREE_DEPRECATED (type)
7866 && deprecated_state != DEPRECATED_SUPPRESS)
7867 warn_deprecated_use (type);
7868 if (type && TREE_CODE (type) == TYPE_DECL)
7870 typedef_decl = type;
7871 type = TREE_TYPE (typedef_decl);
7872 if (TREE_DEPRECATED (type)
7873 && DECL_ARTIFICIAL (typedef_decl)
7874 && deprecated_state != DEPRECATED_SUPPRESS)
7875 warn_deprecated_use (type);
7877 /* No type at all: default to `int', and set DEFAULTED_INT
7878 because it was not a user-defined typedef. */
7879 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7881 /* These imply 'int'. */
7882 type = integer_type_node;
7886 explicit_int = declspecs->explicit_int_p;
7887 explicit_char = declspecs->explicit_char_p;
7890 /* See the code below that used this. */
7892 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7894 typedef_type = type;
7897 if (sfk != sfk_conversion)
7898 ctor_return_type = ctype;
7900 if (sfk != sfk_none)
7901 type = check_special_function_return_type (sfk, type,
7903 else if (type == NULL_TREE)
7909 /* We handle `main' specially here, because 'main () { }' is so
7910 common. With no options, it is allowed. With -Wreturn-type,
7911 it is a warning. It is only an error with -pedantic-errors. */
7912 is_main = (funcdef_flag
7913 && dname && MAIN_NAME_P (dname)
7914 && ctype == NULL_TREE
7915 && in_namespace == NULL_TREE
7916 && current_namespace == global_namespace);
7918 if (type_was_error_mark_node)
7919 /* We've already issued an error, don't complain more. */;
7920 else if (in_system_header || flag_ms_extensions)
7921 /* Allow it, sigh. */;
7923 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7925 pedwarn (input_location, OPT_pedantic,
7926 "ISO C++ forbids declaration of %qs with no type", name);
7928 warning (OPT_Wreturn_type,
7929 "ISO C++ forbids declaration of %qs with no type", name);
7931 type = integer_type_node;
7936 /* Now process the modifiers that were specified
7937 and check for invalid combinations. */
7939 /* Long double is a special combination. */
7940 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7943 type = build_qualified_type (long_double_type_node,
7944 cp_type_quals (type));
7947 /* Check all other uses of type modifiers. */
7949 if (unsigned_p || signed_p || long_p || short_p)
7953 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7954 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7955 else if (signed_p && unsigned_p)
7956 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7957 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7958 error ("%<long long%> invalid for %qs", name);
7959 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7960 error ("%<long%> invalid for %qs", name);
7961 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7962 error ("%<short%> invalid for %qs", name);
7963 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7964 error ("%<long%> or %<short%> invalid for %qs", name);
7965 else if ((long_p || short_p) && explicit_char)
7966 error ("%<long%> or %<short%> specified with char for %qs", name);
7967 else if (long_p && short_p)
7968 error ("%<long%> and %<short%> specified together for %qs", name);
7969 else if (type == char16_type_node || type == char32_type_node)
7971 if (signed_p || unsigned_p)
7972 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7973 else if (short_p || long_p)
7974 error ("%<short%> or %<long%> invalid for %qs", name);
7979 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7981 pedwarn (input_location, OPT_pedantic,
7982 "long, short, signed or unsigned used invalidly for %qs",
7984 if (flag_pedantic_errors)
7989 /* Discard the type modifiers if they are invalid. */
8000 /* Decide whether an integer type is signed or not.
8001 Optionally treat bitfields as signed by default. */
8005 It is implementation-defined whether a plain (neither
8006 explicitly signed or unsigned) char, short, int, or long
8007 bit-field is signed or unsigned.
8009 Naturally, we extend this to long long as well. Note that
8010 this does not include wchar_t. */
8011 || (bitfield && !flag_signed_bitfields
8013 /* A typedef for plain `int' without `signed' can be
8014 controlled just like plain `int', but a typedef for
8015 `signed int' cannot be so controlled. */
8017 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8018 && TREE_CODE (type) == INTEGER_TYPE
8019 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8022 type = long_long_unsigned_type_node;
8024 type = long_unsigned_type_node;
8026 type = short_unsigned_type_node;
8027 else if (type == char_type_node)
8028 type = unsigned_char_type_node;
8029 else if (typedef_decl)
8030 type = unsigned_type_for (type);
8032 type = unsigned_type_node;
8034 else if (signed_p && type == char_type_node)
8035 type = signed_char_type_node;
8037 type = long_long_integer_type_node;
8039 type = long_integer_type_node;
8041 type = short_integer_type_node;
8043 if (declspecs->specs[(int)ds_complex])
8045 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8046 error ("complex invalid for %qs", name);
8047 /* If we just have "complex", it is equivalent to
8048 "complex double", but if any modifiers at all are specified it is
8049 the complex form of TYPE. E.g, "complex short" is
8050 "complex short int". */
8052 else if (defaulted_int && ! longlong
8053 && ! (long_p || short_p || signed_p || unsigned_p))
8054 type = complex_double_type_node;
8055 else if (type == integer_type_node)
8056 type = complex_integer_type_node;
8057 else if (type == float_type_node)
8058 type = complex_float_type_node;
8059 else if (type == double_type_node)
8060 type = complex_double_type_node;
8061 else if (type == long_double_type_node)
8062 type = complex_long_double_type_node;
8064 type = build_complex_type (type);
8067 type_quals = TYPE_UNQUALIFIED;
8068 if (declspecs->specs[(int)ds_const])
8069 type_quals |= TYPE_QUAL_CONST;
8070 if (declspecs->specs[(int)ds_volatile])
8071 type_quals |= TYPE_QUAL_VOLATILE;
8072 if (declspecs->specs[(int)ds_restrict])
8073 type_quals |= TYPE_QUAL_RESTRICT;
8074 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8075 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8078 if (TREE_CODE (type) == FUNCTION_TYPE
8079 && type_quals != TYPE_UNQUALIFIED)
8081 /* This was an error in C++98 (cv-qualifiers cannot be added to
8082 a function type), but DR 295 makes the code well-formed by
8083 dropping the extra qualifiers. */
8086 tree bad_type = build_qualified_type (type, type_quals);
8087 pedwarn (input_location, OPT_pedantic,
8088 "ignoring %qV qualifiers added to function type %qT",
8091 type_quals = TYPE_UNQUALIFIED;
8093 type_quals |= cp_type_quals (type);
8094 type = cp_build_qualified_type_real
8095 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8096 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8097 /* We might have ignored or rejected some of the qualifiers. */
8098 type_quals = cp_type_quals (type);
8101 inlinep = !! declspecs->specs[(int)ds_inline];
8102 virtualp = !! declspecs->specs[(int)ds_virtual];
8103 explicitp = !! declspecs->specs[(int)ds_explicit];
8105 storage_class = declspecs->storage_class;
8106 if (storage_class == sc_static)
8107 staticp = 1 + (decl_context == FIELD);
8109 if (virtualp && staticp == 2)
8111 error ("member %qD cannot be declared both virtual and static", dname);
8112 storage_class = sc_none;
8115 friendp = !! declspecs->specs[(int)ds_friend];
8117 if (dependent_name && !friendp)
8119 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8120 return error_mark_node;
8123 /* Issue errors about use of storage classes for parameters. */
8124 if (decl_context == PARM)
8126 if (declspecs->specs[(int)ds_typedef])
8128 error ("typedef declaration invalid in parameter declaration");
8129 return error_mark_node;
8131 else if (storage_class == sc_static
8132 || storage_class == sc_extern
8134 error ("storage class specifiers invalid in parameter declarations");
8136 if (type_uses_auto (type))
8138 error ("parameter declared %<auto%>");
8139 type = error_mark_node;
8143 /* Give error if `virtual' is used outside of class declaration. */
8145 && (current_class_name == NULL_TREE || decl_context != FIELD))
8147 error ("%<virtual%> outside class declaration");
8151 /* Static anonymous unions are dealt with here. */
8152 if (staticp && decl_context == TYPENAME
8154 && ANON_AGGR_TYPE_P (declspecs->type))
8155 decl_context = FIELD;
8157 /* Warn about storage classes that are invalid for certain
8158 kinds of declarations (parameters, typenames, etc.). */
8161 && storage_class != sc_extern
8162 && storage_class != sc_static)
8163 || declspecs->specs[(int)ds_typedef]))
8165 error ("multiple storage classes in declaration of %qs", name);
8168 if (decl_context != NORMAL
8169 && ((storage_class != sc_none
8170 && storage_class != sc_mutable)
8173 if ((decl_context == PARM || decl_context == CATCHPARM)
8174 && (storage_class == sc_register
8175 || storage_class == sc_auto))
8177 else if (declspecs->specs[(int)ds_typedef])
8179 else if (decl_context == FIELD
8180 /* C++ allows static class elements. */
8181 && storage_class == sc_static)
8182 /* C++ also allows inlines and signed and unsigned elements,
8183 but in those cases we don't come in here. */
8187 if (decl_context == FIELD)
8188 error ("storage class specified for %qs", name);
8191 if (decl_context == PARM || decl_context == CATCHPARM)
8192 error ("storage class specified for parameter %qs", name);
8194 error ("storage class specified for typename");
8196 if (storage_class == sc_register
8197 || storage_class == sc_auto
8198 || storage_class == sc_extern
8200 storage_class = sc_none;
8203 else if (storage_class == sc_extern && funcdef_flag
8204 && ! toplevel_bindings_p ())
8205 error ("nested function %qs declared %<extern%>", name);
8206 else if (toplevel_bindings_p ())
8208 if (storage_class == sc_auto)
8209 error ("top-level declaration of %qs specifies %<auto%>", name);
8212 && storage_class != sc_extern
8213 && storage_class != sc_static)
8215 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8220 if (storage_class && friendp)
8222 error ("storage class specifiers invalid in friend function declarations");
8223 storage_class = sc_none;
8228 unqualified_id = NULL_TREE;
8231 unqualified_id = id_declarator->u.id.unqualified_name;
8232 switch (TREE_CODE (unqualified_id))
8235 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8236 if (TYPE_P (unqualified_id))
8237 unqualified_id = constructor_name (unqualified_id);
8240 case IDENTIFIER_NODE:
8241 case TEMPLATE_ID_EXPR:
8249 /* Determine the type of the entity declared by recurring on the
8251 for (; declarator; declarator = declarator->declarator)
8253 const cp_declarator *inner_declarator;
8256 if (type == error_mark_node)
8257 return error_mark_node;
8259 attrs = declarator->attributes;
8265 if (declarator == NULL || declarator->kind == cdk_id)
8266 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8267 if (declarator->kind == cdk_function)
8268 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8269 if (declarator->kind == cdk_array)
8270 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8271 returned_attrs = decl_attributes (&type,
8272 chainon (returned_attrs, attrs),
8276 if (declarator->kind == cdk_id)
8279 inner_declarator = declarator->declarator;
8281 switch (declarator->kind)
8284 type = create_array_type_for_decl (dname, type,
8285 declarator->u.array.bounds);
8293 /* Declaring a function type.
8294 Make sure we have a valid type for the function to return. */
8296 if (type_quals != TYPE_UNQUALIFIED)
8298 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8299 warning (OPT_Wignored_qualifiers,
8300 "type qualifiers ignored on function return type");
8301 /* We now know that the TYPE_QUALS don't apply to the
8302 decl, but to its return type. */
8303 type_quals = TYPE_UNQUALIFIED;
8306 /* Error about some types functions can't return. */
8308 if (TREE_CODE (type) == FUNCTION_TYPE)
8310 error ("%qs declared as function returning a function", name);
8311 return error_mark_node;
8313 if (TREE_CODE (type) == ARRAY_TYPE)
8315 error ("%qs declared as function returning an array", name);
8316 return error_mark_node;
8319 /* Pick up type qualifiers which should be applied to `this'. */
8320 memfn_quals = declarator->u.function.qualifiers;
8322 /* Pick up the exception specifications. */
8323 raises = declarator->u.function.exception_specification;
8325 /* Say it's a definition only for the CALL_EXPR
8326 closest to the identifier. */
8327 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8329 /* Handle a late-specified return type. */
8332 if (type_uses_auto (type))
8334 if (!declarator->u.function.late_return_type)
8336 error ("%qs function uses %<auto%> type specifier without"
8337 " late return type", name);
8338 return error_mark_node;
8340 else if (!is_auto (type))
8342 error ("%qs function with late return type has"
8343 " %qT as its type rather than plain %<auto%>",
8345 return error_mark_node;
8348 else if (declarator->u.function.late_return_type)
8350 error ("%qs function with late return type not declared"
8351 " with %<auto%> type specifier", name);
8352 return error_mark_node;
8355 type = splice_late_return_type
8356 (type, declarator->u.function.late_return_type);
8357 if (type == error_mark_node)
8358 return error_mark_node;
8360 if (ctype == NULL_TREE
8361 && decl_context == FIELD
8363 && (friendp == 0 || dname == current_class_name))
8364 ctype = current_class_type;
8366 if (ctype && (sfk == sfk_constructor
8367 || sfk == sfk_destructor))
8369 /* We are within a class's scope. If our declarator name
8370 is the same as the class name, and we are defining
8371 a function, then it is a constructor/destructor, and
8372 therefore returns a void type. */
8374 /* ISO C++ 12.4/2. A destructor may not be declared
8375 const or volatile. A destructor may not be
8378 ISO C++ 12.1. A constructor may not be declared
8379 const or volatile. A constructor may not be
8380 virtual. A constructor may not be static. */
8382 error ((flags == DTOR_FLAG)
8383 ? "destructor cannot be static member function"
8384 : "constructor cannot be static member function");
8387 error ((flags == DTOR_FLAG)
8388 ? "destructors may not be cv-qualified"
8389 : "constructors may not be cv-qualified");
8390 memfn_quals = TYPE_UNQUALIFIED;
8393 if (decl_context == FIELD
8394 && !member_function_or_else (ctype,
8397 return error_mark_node;
8399 if (flags != DTOR_FLAG)
8401 /* It's a constructor. */
8406 permerror (input_location, "constructors cannot be declared virtual");
8409 if (decl_context == FIELD
8410 && sfk != sfk_constructor)
8411 return error_mark_node;
8413 if (decl_context == FIELD)
8419 error ("can't initialize friend function %qs", name);
8422 /* Cannot be both friend and virtual. */
8423 error ("virtual functions cannot be friends");
8426 if (decl_context == NORMAL)
8427 error ("friend declaration not in class definition");
8428 if (current_function_decl && funcdef_flag)
8429 error ("can't define friend function %qs in a local "
8434 arg_types = grokparms (declarator->u.function.parameters,
8437 if (inner_declarator
8438 && inner_declarator->kind == cdk_id
8439 && inner_declarator->u.id.sfk == sfk_destructor
8440 && arg_types != void_list_node)
8442 error ("destructors may not have parameters");
8443 arg_types = void_list_node;
8447 type = build_function_type (type, arg_types);
8454 /* Filter out pointers-to-references and references-to-references.
8455 We can get these if a TYPE_DECL is used. */
8457 if (TREE_CODE (type) == REFERENCE_TYPE)
8459 if (declarator->kind != cdk_reference)
8461 error ("cannot declare pointer to %q#T", type);
8462 type = TREE_TYPE (type);
8465 /* In C++0x, we allow reference to reference declarations
8466 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8467 and template type arguments [14.3.1/4 temp.arg.type]. The
8468 check for direct reference to reference declarations, which
8469 are still forbidden, occurs below. Reasoning behind the change
8470 can be found in DR106, DR540, and the rvalue reference
8472 else if (cxx_dialect == cxx98)
8474 error ("cannot declare reference to %q#T", type);
8475 type = TREE_TYPE (type);
8478 else if (VOID_TYPE_P (type))
8480 if (declarator->kind == cdk_reference)
8481 error ("cannot declare reference to %q#T", type);
8482 else if (declarator->kind == cdk_ptrmem)
8483 error ("cannot declare pointer to %q#T member", type);
8486 /* We now know that the TYPE_QUALS don't apply to the decl,
8487 but to the target of the pointer. */
8488 type_quals = TYPE_UNQUALIFIED;
8490 if (declarator->kind == cdk_ptrmem
8491 && (TREE_CODE (type) == FUNCTION_TYPE
8492 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8494 memfn_quals |= cp_type_quals (type);
8495 type = build_memfn_type (type,
8496 declarator->u.pointer.class_type,
8498 memfn_quals = TYPE_UNQUALIFIED;
8501 if (TREE_CODE (type) == FUNCTION_TYPE
8502 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8503 error ("cannot declare %s to qualified function type %qT",
8504 declarator->kind == cdk_reference ? "reference" : "pointer",
8507 /* When the pointed-to type involves components of variable size,
8508 care must be taken to ensure that the size evaluation code is
8509 emitted early enough to dominate all the possible later uses
8510 and late enough for the variables on which it depends to have
8513 This is expected to happen automatically when the pointed-to
8514 type has a name/declaration of it's own, but special attention
8515 is required if the type is anonymous.
8517 We handle the NORMAL and FIELD contexts here by inserting a
8518 dummy statement that just evaluates the size at a safe point
8519 and ensures it is not deferred until e.g. within a deeper
8520 conditional context (c++/43555).
8522 We expect nothing to be needed here for PARM or TYPENAME.
8523 Evaluating the size at this point for TYPENAME would
8524 actually be incorrect, as we might be in the middle of an
8525 expression with side effects on the pointed-to type size
8526 "arguments" prior to the pointer declaration point and the
8527 size evaluation could end up prior to the side effects. */
8529 if (!TYPE_NAME (type)
8530 && (decl_context == NORMAL || decl_context == FIELD)
8531 && at_function_scope_p ()
8532 && variably_modified_type_p (type, NULL_TREE))
8533 finish_expr_stmt (TYPE_SIZE (type));
8535 if (declarator->kind == cdk_reference)
8537 /* In C++0x, the type we are creating a reference to might be
8538 a typedef which is itself a reference type. In that case,
8539 we follow the reference collapsing rules in
8540 [7.1.3/8 dcl.typedef] to create the final reference type:
8542 "If a typedef TD names a type that is a reference to a type
8543 T, an attempt to create the type 'lvalue reference to cv TD'
8544 creates the type 'lvalue reference to T,' while an attempt
8545 to create the type "rvalue reference to cv TD' creates the
8548 if (!VOID_TYPE_P (type))
8549 type = cp_build_reference_type
8550 ((TREE_CODE (type) == REFERENCE_TYPE
8551 ? TREE_TYPE (type) : type),
8552 (declarator->u.reference.rvalue_ref
8553 && (TREE_CODE(type) != REFERENCE_TYPE
8554 || TYPE_REF_IS_RVALUE (type))));
8556 /* In C++0x, we need this check for direct reference to
8557 reference declarations, which are forbidden by
8558 [8.3.2/5 dcl.ref]. Reference to reference declarations
8559 are only allowed indirectly through typedefs and template
8560 type arguments. Example:
8562 void foo(int & &); // invalid ref-to-ref decl
8564 typedef int & int_ref;
8565 void foo(int_ref &); // valid ref-to-ref decl
8567 if (inner_declarator && inner_declarator->kind == cdk_reference)
8568 error ("cannot declare reference to %q#T, which is not "
8569 "a typedef or a template type argument", type);
8571 else if (TREE_CODE (type) == METHOD_TYPE)
8572 type = build_ptrmemfunc_type (build_pointer_type (type));
8573 else if (declarator->kind == cdk_ptrmem)
8575 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8577 if (declarator->u.pointer.class_type == error_mark_node)
8578 /* We will already have complained. */
8579 type = error_mark_node;
8581 type = build_ptrmem_type (declarator->u.pointer.class_type,
8585 type = build_pointer_type (type);
8587 /* Process a list of type modifier keywords (such as
8588 const or volatile) that were given inside the `*' or `&'. */
8590 if (declarator->u.pointer.qualifiers)
8593 = cp_build_qualified_type (type,
8594 declarator->u.pointer.qualifiers);
8595 type_quals = cp_type_quals (type);
8608 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8609 && TREE_CODE (type) != FUNCTION_TYPE
8610 && TREE_CODE (type) != METHOD_TYPE)
8612 error ("template-id %qD used as a declarator",
8614 unqualified_id = dname;
8617 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8618 qualified with a class-name, turn it into a METHOD_TYPE, unless
8619 we know that the function is static. We take advantage of this
8620 opportunity to do other processing that pertains to entities
8621 explicitly declared to be class members. Note that if DECLARATOR
8622 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8623 would not have exited the loop above. */
8625 && declarator->u.id.qualifying_scope
8626 && TYPE_P (declarator->u.id.qualifying_scope))
8630 ctype = declarator->u.id.qualifying_scope;
8631 ctype = TYPE_MAIN_VARIANT (ctype);
8633 while (t != NULL_TREE && CLASS_TYPE_P (t))
8635 /* You're supposed to have one `template <...>' for every
8636 template class, but you don't need one for a full
8637 specialization. For example:
8639 template <class T> struct S{};
8640 template <> struct S<int> { void f(); };
8641 void S<int>::f () {}
8643 is correct; there shouldn't be a `template <>' for the
8644 definition of `S<int>::f'. */
8645 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8646 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8647 /* T is an explicit (not partial) specialization. All
8648 containing classes must therefore also be explicitly
8651 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8652 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8653 template_count += 1;
8655 t = TYPE_MAIN_DECL (t);
8656 t = DECL_CONTEXT (t);
8659 if (ctype == current_class_type)
8663 permerror (input_location, "member functions are implicitly friends of their class");
8667 permerror (declarator->id_loc,
8668 "extra qualification %<%T::%> on member %qs",
8671 else if (/* If the qualifying type is already complete, then we
8672 can skip the following checks. */
8673 !COMPLETE_TYPE_P (ctype)
8674 && (/* If the function is being defined, then
8675 qualifying type must certainly be complete. */
8677 /* A friend declaration of "T::f" is OK, even if
8678 "T" is a template parameter. But, if this
8679 function is not a friend, the qualifying type
8681 || (!friendp && !CLASS_TYPE_P (ctype))
8682 /* For a declaration, the type need not be
8683 complete, if either it is dependent (since there
8684 is no meaningful definition of complete in that
8685 case) or the qualifying class is currently being
8687 || !(dependent_type_p (ctype)
8688 || currently_open_class (ctype)))
8689 /* Check that the qualifying type is complete. */
8690 && !complete_type_or_else (ctype, NULL_TREE))
8691 return error_mark_node;
8692 else if (TREE_CODE (type) == FUNCTION_TYPE)
8694 tree sname = declarator->u.id.unqualified_name;
8696 if (current_class_type
8697 && (!friendp || funcdef_flag))
8700 ? "cannot define member function %<%T::%s%> within %<%T%>"
8701 : "cannot declare member function %<%T::%s%> within %<%T%>",
8702 ctype, name, current_class_type);
8703 return error_mark_node;
8706 if (TREE_CODE (sname) == IDENTIFIER_NODE
8707 && NEW_DELETE_OPNAME_P (sname))
8708 /* Overloaded operator new and operator delete
8709 are always static functions. */
8712 type = build_memfn_type (type, ctype, memfn_quals);
8714 else if (declspecs->specs[(int)ds_typedef]
8715 && current_class_type)
8717 error ("cannot declare member %<%T::%s%> within %qT",
8718 ctype, name, current_class_type);
8719 return error_mark_node;
8723 /* Now TYPE has the actual type. */
8728 *attrlist = chainon (returned_attrs, *attrlist);
8730 attrlist = &returned_attrs;
8733 /* Handle parameter packs. */
8734 if (parameter_pack_p)
8736 if (decl_context == PARM)
8737 /* Turn the type into a pack expansion.*/
8738 type = make_pack_expansion (type);
8740 error ("non-parameter %qs cannot be a parameter pack", name);
8743 /* Did array size calculations overflow? */
8745 if (TREE_CODE (type) == ARRAY_TYPE
8746 && COMPLETE_TYPE_P (type)
8747 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8748 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8750 error ("size of array %qs is too large", name);
8751 /* If we proceed with the array type as it is, we'll eventually
8752 crash in tree_low_cst(). */
8753 type = error_mark_node;
8756 if ((decl_context == FIELD || decl_context == PARM)
8757 && !processing_template_decl
8758 && variably_modified_type_p (type, NULL_TREE))
8760 if (decl_context == FIELD)
8761 error ("data member may not have variably modified type %qT", type);
8763 error ("parameter may not have variably modified type %qT", type);
8764 type = error_mark_node;
8767 if (explicitp == 1 || (explicitp && friendp))
8769 /* [dcl.fct.spec] The explicit specifier shall only be used in
8770 declarations of constructors within a class definition. */
8771 error ("only declarations of constructors can be %<explicit%>");
8775 if (storage_class == sc_mutable)
8777 if (decl_context != FIELD || friendp)
8779 error ("non-member %qs cannot be declared %<mutable%>", name);
8780 storage_class = sc_none;
8782 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8784 error ("non-object member %qs cannot be declared %<mutable%>", name);
8785 storage_class = sc_none;
8787 else if (TREE_CODE (type) == FUNCTION_TYPE
8788 || TREE_CODE (type) == METHOD_TYPE)
8790 error ("function %qs cannot be declared %<mutable%>", name);
8791 storage_class = sc_none;
8795 error ("static %qs cannot be declared %<mutable%>", name);
8796 storage_class = sc_none;
8798 else if (type_quals & TYPE_QUAL_CONST)
8800 error ("const %qs cannot be declared %<mutable%>", name);
8801 storage_class = sc_none;
8805 /* If this is declaring a typedef name, return a TYPE_DECL. */
8806 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8810 /* Note that the grammar rejects storage classes
8811 in typenames, fields or parameters. */
8812 if (current_lang_name == lang_name_java)
8813 TYPE_FOR_JAVA (type) = 1;
8815 /* This declaration:
8817 typedef void f(int) const;
8819 declares a function type which is not a member of any
8820 particular class, but which is cv-qualified; for
8821 example "f S::*" declares a pointer to a const-qualified
8822 member function of S. We record the cv-qualification in the
8824 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8826 type = cp_build_qualified_type (type, memfn_quals);
8828 /* We have now dealt with these qualifiers. */
8829 memfn_quals = TYPE_UNQUALIFIED;
8832 if (decl_context == FIELD)
8833 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8835 decl = build_decl (TYPE_DECL, unqualified_id, type);
8836 if (id_declarator && declarator->u.id.qualifying_scope) {
8837 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8838 TREE_TYPE (decl) = error_mark_node;
8841 if (decl_context != FIELD)
8843 if (!current_function_decl)
8844 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8845 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8846 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8847 (current_function_decl)))
8848 /* The TYPE_DECL is "abstract" because there will be
8849 clones of this constructor/destructor, and there will
8850 be copies of this TYPE_DECL generated in those
8852 DECL_ABSTRACT (decl) = 1;
8854 else if (constructor_name_p (unqualified_id, current_class_type))
8855 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8856 "as enclosing class",
8859 /* If the user declares "typedef struct {...} foo" then the
8860 struct will have an anonymous name. Fill that name in now.
8861 Nothing can refer to it, so nothing needs know about the name
8863 if (type != error_mark_node
8866 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8867 && TYPE_ANONYMOUS_P (type)
8868 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8870 tree oldname = TYPE_NAME (type);
8873 /* Replace the anonymous name with the real name everywhere. */
8874 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8875 if (TYPE_NAME (t) == oldname)
8876 TYPE_NAME (t) = decl;
8878 if (TYPE_LANG_SPECIFIC (type))
8879 TYPE_WAS_ANONYMOUS (type) = 1;
8881 /* If this is a typedef within a template class, the nested
8882 type is a (non-primary) template. The name for the
8883 template needs updating as well. */
8884 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8885 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8886 = TYPE_IDENTIFIER (type);
8888 /* FIXME remangle member functions; member functions of a
8889 type with external linkage have external linkage. */
8893 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8894 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8896 bad_specifiers (decl, "type", virtualp,
8897 memfn_quals != TYPE_UNQUALIFIED,
8898 inlinep, friendp, raises != NULL_TREE);
8903 /* Detect the case of an array type of unspecified size
8904 which came, as such, direct from a typedef name.
8905 We must copy the type, so that the array's domain can be
8906 individually set by the object's initializer. */
8908 if (type && typedef_type
8909 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8910 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8911 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8913 /* Detect where we're using a typedef of function type to declare a
8914 function. PARMS will not be set, so we must create it now. */
8916 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8918 tree decls = NULL_TREE;
8921 for (args = TYPE_ARG_TYPES (type);
8922 args && args != void_list_node;
8923 args = TREE_CHAIN (args))
8925 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8927 TREE_CHAIN (decl) = decls;
8931 parms = nreverse (decls);
8933 if (decl_context != TYPENAME)
8935 /* A cv-qualifier-seq shall only be part of the function type
8936 for a non-static member function. [8.3.5/4 dcl.fct] */
8937 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8938 && (current_class_type == NULL_TREE || staticp) )
8941 ? G_("qualified function types cannot be used to "
8942 "declare static member functions")
8943 : G_("qualified function types cannot be used to "
8944 "declare free functions"));
8945 type = TYPE_MAIN_VARIANT (type);
8948 /* The qualifiers on the function type become the qualifiers on
8949 the non-static member function. */
8950 memfn_quals |= cp_type_quals (type);
8954 /* If this is a type name (such as, in a cast or sizeof),
8955 compute the type and return it now. */
8957 if (decl_context == TYPENAME)
8959 /* Note that the grammar rejects storage classes
8960 in typenames, fields or parameters. */
8961 if (type_quals != TYPE_UNQUALIFIED)
8962 type_quals = TYPE_UNQUALIFIED;
8964 /* Special case: "friend class foo" looks like a TYPENAME context. */
8967 if (type_quals != TYPE_UNQUALIFIED)
8969 error ("type qualifiers specified for friend class declaration");
8970 type_quals = TYPE_UNQUALIFIED;
8974 error ("%<inline%> specified for friend class declaration");
8980 /* Don't allow friend declaration without a class-key. */
8981 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8982 permerror (input_location, "template parameters cannot be friends");
8983 else if (TREE_CODE (type) == TYPENAME_TYPE)
8984 permerror (input_location, "friend declaration requires class-key, "
8985 "i.e. %<friend class %T::%D%>",
8986 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8988 permerror (input_location, "friend declaration requires class-key, "
8989 "i.e. %<friend %#T%>",
8993 /* Only try to do this stuff if we didn't already give up. */
8994 if (type != integer_type_node)
8996 /* A friendly class? */
8997 if (current_class_type)
8998 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9001 error ("trying to make class %qT a friend of global scope",
9004 type = void_type_node;
9007 else if (memfn_quals)
9009 if (ctype == NULL_TREE
9010 && TREE_CODE (type) == METHOD_TYPE)
9011 ctype = TYPE_METHOD_BASETYPE (type);
9014 type = build_memfn_type (type, ctype, memfn_quals);
9015 /* Core issue #547: need to allow this in template type args. */
9016 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9017 type = cp_build_qualified_type (type, memfn_quals);
9019 error ("invalid qualifiers on non-member function type");
9024 else if (unqualified_id == NULL_TREE && decl_context != PARM
9025 && decl_context != CATCHPARM
9026 && TREE_CODE (type) != UNION_TYPE
9029 error ("abstract declarator %qT used as declaration", type);
9030 return error_mark_node;
9033 /* Only functions may be declared using an operator-function-id. */
9035 && IDENTIFIER_OPNAME_P (unqualified_id)
9036 && TREE_CODE (type) != FUNCTION_TYPE
9037 && TREE_CODE (type) != METHOD_TYPE)
9039 error ("declaration of %qD as non-function", unqualified_id);
9040 return error_mark_node;
9043 /* We don't check parameter types here because we can emit a better
9044 error message later. */
9045 if (decl_context != PARM)
9047 type = check_var_type (unqualified_id, type);
9048 if (type == error_mark_node)
9049 return error_mark_node;
9052 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9053 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9055 if (decl_context == PARM || decl_context == CATCHPARM)
9057 if (ctype || in_namespace)
9058 error ("cannot use %<::%> in parameter declaration");
9060 /* A parameter declared as an array of T is really a pointer to T.
9061 One declared as a function is really a pointer to a function.
9062 One declared as a member is really a pointer to member. */
9064 if (TREE_CODE (type) == ARRAY_TYPE)
9066 /* Transfer const-ness of array into that of type pointed to. */
9067 type = build_pointer_type (TREE_TYPE (type));
9068 type_quals = TYPE_UNQUALIFIED;
9070 else if (TREE_CODE (type) == FUNCTION_TYPE)
9071 type = build_pointer_type (type);
9077 if (decl_context == PARM)
9079 decl = cp_build_parm_decl (unqualified_id, type);
9081 bad_specifiers (decl, "parameter", virtualp,
9082 memfn_quals != TYPE_UNQUALIFIED,
9083 inlinep, friendp, raises != NULL_TREE);
9085 else if (decl_context == FIELD)
9087 /* The C99 flexible array extension. */
9088 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9089 && TYPE_DOMAIN (type) == NULL_TREE)
9091 tree itype = compute_array_index_type (dname, integer_zero_node);
9092 type = build_cplus_array_type (TREE_TYPE (type), itype);
9095 if (type == error_mark_node)
9097 /* Happens when declaring arrays of sizes which
9098 are error_mark_node, for example. */
9101 else if (in_namespace && !friendp)
9103 /* Something like struct S { int N::j; }; */
9104 error ("invalid use of %<::%>");
9105 return error_mark_node;
9107 else if (TREE_CODE (type) == FUNCTION_TYPE)
9110 tree function_context;
9114 if (ctype == NULL_TREE)
9115 ctype = current_class_type;
9117 if (ctype == NULL_TREE)
9119 error ("can't make %qD into a method -- not in a class",
9121 return error_mark_node;
9124 /* ``A union may [ ... ] not [ have ] virtual functions.''
9126 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9128 error ("function %qD declared virtual inside a union",
9130 return error_mark_node;
9133 if (NEW_DELETE_OPNAME_P (unqualified_id))
9137 error ("%qD cannot be declared virtual, since it "
9143 else if (staticp < 2)
9144 type = build_memfn_type (type, ctype, memfn_quals);
9147 /* Check that the name used for a destructor makes sense. */
9148 if (sfk == sfk_destructor)
9150 tree uqname = id_declarator->u.id.unqualified_name;
9154 gcc_assert (friendp);
9155 error ("expected qualified name in friend declaration "
9156 "for destructor %qD", uqname);
9157 return error_mark_node;
9160 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9162 error ("declaration of %qD as member of %qT",
9164 return error_mark_node;
9167 else if (sfk == sfk_constructor && friendp)
9169 error ("expected qualified name in friend declaration "
9170 "for constructor %qD",
9171 id_declarator->u.id.unqualified_name);
9172 return error_mark_node;
9175 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9176 function_context = (ctype != NULL_TREE) ?
9177 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9178 publicp = (! friendp || ! staticp)
9179 && function_context == NULL_TREE;
9180 decl = grokfndecl (ctype, type,
9181 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9182 ? unqualified_id : dname,
9185 virtualp, flags, memfn_quals, raises,
9186 friendp ? -1 : 0, friendp, publicp, inlinep,
9188 funcdef_flag, template_count, in_namespace,
9189 attrlist, declarator->id_loc);
9190 if (decl == NULL_TREE)
9191 return error_mark_node;
9193 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9194 /* The decl and setting of decl_attr is also turned off. */
9195 decl = build_decl_attribute_variant (decl, decl_attr);
9198 /* [class.conv.ctor]
9200 A constructor declared without the function-specifier
9201 explicit that can be called with a single parameter
9202 specifies a conversion from the type of its first
9203 parameter to the type of its class. Such a constructor
9204 is called a converting constructor. */
9206 DECL_NONCONVERTING_P (decl) = 1;
9208 else if (TREE_CODE (type) == METHOD_TYPE)
9210 /* We only get here for friend declarations of
9211 members of other classes. */
9212 /* All method decls are public, so tell grokfndecl to set
9213 TREE_PUBLIC, also. */
9214 decl = grokfndecl (ctype, type,
9215 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9216 ? unqualified_id : dname,
9219 virtualp, flags, memfn_quals, raises,
9220 friendp ? -1 : 0, friendp, 1, 0, sfk,
9221 funcdef_flag, template_count, in_namespace,
9223 declarator->id_loc);
9224 if (decl == NULL_TREE)
9225 return error_mark_node;
9227 else if (!staticp && !dependent_type_p (type)
9228 && !COMPLETE_TYPE_P (complete_type (type))
9229 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9232 error ("field %qD has incomplete type", unqualified_id);
9234 error ("name %qT has incomplete type", type);
9236 /* If we're instantiating a template, tell them which
9237 instantiation made the field's type be incomplete. */
9238 if (current_class_type
9239 && TYPE_NAME (current_class_type)
9240 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9242 && declspecs->type == type)
9243 error (" in instantiation of template %qT",
9244 current_class_type);
9246 return error_mark_node;
9252 error ("%qE is neither function nor member function; "
9253 "cannot be declared friend", unqualified_id);
9261 /* Friends are treated specially. */
9262 if (ctype == current_class_type)
9263 ; /* We already issued a permerror. */
9264 else if (decl && DECL_NAME (decl))
9266 if (template_class_depth (current_class_type) == 0)
9268 decl = check_explicit_specialization
9269 (unqualified_id, decl, template_count,
9270 2 * funcdef_flag + 4);
9271 if (decl == error_mark_node)
9272 return error_mark_node;
9275 decl = do_friend (ctype, unqualified_id, decl,
9281 return error_mark_node;
9284 /* Structure field. It may not be a function, except for C++. */
9286 if (decl == NULL_TREE)
9292 /* An attempt is being made to initialize a non-static
9293 member. But, from [class.mem]:
9295 4 A member-declarator can contain a
9296 constant-initializer only if it declares a static
9297 member (_class.static_) of integral or enumeration
9298 type, see _class.static.data_.
9300 This used to be relatively common practice, but
9301 the rest of the compiler does not correctly
9302 handle the initialization unless the member is
9303 static so we make it static below. */
9304 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9306 permerror (input_location, "making %qD static", unqualified_id);
9310 if (uses_template_parms (type))
9311 /* We'll check at instantiation time. */
9313 else if (check_static_variable_definition (unqualified_id,
9315 /* If we just return the declaration, crashes
9316 will sometimes occur. We therefore return
9317 void_type_node, as if this was a friend
9318 declaration, to cause callers to completely
9319 ignore this declaration. */
9320 return error_mark_node;
9325 /* C++ allows static class members. All other work
9326 for this is done by grokfield. */
9327 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9328 set_linkage_for_static_data_member (decl);
9329 /* Even if there is an in-class initialization, DECL
9330 is considered undefined until an out-of-class
9331 definition is provided. */
9332 DECL_EXTERNAL (decl) = 1;
9335 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9339 decl = build_decl (FIELD_DECL, unqualified_id, type);
9340 DECL_NONADDRESSABLE_P (decl) = bitfield;
9341 if (bitfield && !unqualified_id)
9342 TREE_NO_WARNING (decl) = 1;
9344 if (storage_class == sc_mutable)
9346 DECL_MUTABLE_P (decl) = 1;
9347 storage_class = sc_none;
9351 bad_specifiers (decl, "field", virtualp,
9352 memfn_quals != TYPE_UNQUALIFIED,
9353 inlinep, friendp, raises != NULL_TREE);
9356 else if (TREE_CODE (type) == FUNCTION_TYPE
9357 || TREE_CODE (type) == METHOD_TYPE)
9362 if (!unqualified_id)
9363 return error_mark_node;
9365 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9366 original_name = dname;
9368 original_name = unqualified_id;
9370 if (storage_class == sc_auto)
9371 error ("storage class %<auto%> invalid for function %qs", name);
9372 else if (storage_class == sc_register)
9373 error ("storage class %<register%> invalid for function %qs", name);
9375 error ("storage class %<__thread%> invalid for function %qs", name);
9377 /* Function declaration not at top level.
9378 Storage classes other than `extern' are not allowed
9379 and `extern' makes no difference. */
9380 if (! toplevel_bindings_p ()
9381 && (storage_class == sc_static
9382 || declspecs->specs[(int)ds_inline])
9385 if (storage_class == sc_static)
9386 pedwarn (input_location, OPT_pedantic,
9387 "%<static%> specified invalid for function %qs "
9388 "declared out of global scope", name);
9390 pedwarn (input_location, OPT_pedantic,
9391 "%<inline%> specifier invalid for function %qs "
9392 "declared out of global scope", name);
9395 if (ctype != NULL_TREE
9396 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9398 error ("%q#T is not a class or a namespace", ctype);
9402 if (ctype == NULL_TREE)
9406 error ("virtual non-class function %qs", name);
9409 else if (sfk == sfk_constructor
9410 || sfk == sfk_destructor)
9413 ? "%qs defined in a non-class scope"
9414 : "%qs declared in a non-class scope", name);
9418 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9419 && !NEW_DELETE_OPNAME_P (original_name))
9420 type = build_method_type_directly (ctype,
9422 TYPE_ARG_TYPES (type));
9424 /* Record presence of `static'. */
9425 publicp = (ctype != NULL_TREE
9426 || storage_class == sc_extern
9427 || storage_class != sc_static);
9429 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9430 virtualp, flags, memfn_quals, raises,
9432 publicp, inlinep, sfk, funcdef_flag,
9433 template_count, in_namespace, attrlist,
9434 declarator->id_loc);
9435 if (decl == NULL_TREE)
9436 return error_mark_node;
9440 int invalid_static = 0;
9442 /* Don't allow a static member function in a class, and forbid
9443 declaring main to be static. */
9444 if (TREE_CODE (type) == METHOD_TYPE)
9446 permerror (input_location, "cannot declare member function %qD to have "
9447 "static linkage", decl);
9450 else if (current_function_decl)
9452 /* FIXME need arm citation */
9453 error ("cannot declare static function inside another function");
9460 storage_class = sc_none;
9466 /* It's a variable. */
9468 /* An uninitialized decl with `extern' is a reference. */
9469 decl = grokvardecl (type, unqualified_id,
9472 (type_quals & TYPE_QUAL_CONST) != 0,
9473 ctype ? ctype : in_namespace);
9474 bad_specifiers (decl, "variable", virtualp,
9475 memfn_quals != TYPE_UNQUALIFIED,
9476 inlinep, friendp, raises != NULL_TREE);
9480 DECL_CONTEXT (decl) = ctype;
9483 permerror (input_location, "%<static%> may not be used when defining "
9484 "(as opposed to declaring) a static data member");
9486 storage_class = sc_none;
9488 if (storage_class == sc_register && TREE_STATIC (decl))
9490 error ("static member %qD declared %<register%>", decl);
9491 storage_class = sc_none;
9493 if (storage_class == sc_extern && pedantic)
9495 pedwarn (input_location, OPT_pedantic,
9496 "cannot explicitly declare member %q#D to have "
9497 "extern linkage", decl);
9498 storage_class = sc_none;
9503 if (storage_class == sc_extern && initialized && !funcdef_flag)
9505 if (toplevel_bindings_p ())
9507 /* It's common practice (and completely valid) to have a const
9508 be initialized and declared extern. */
9509 if (!(type_quals & TYPE_QUAL_CONST))
9510 warning (0, "%qs initialized and declared %<extern%>", name);
9514 error ("%qs has both %<extern%> and initializer", name);
9515 return error_mark_node;
9519 /* Record `register' declaration for warnings on &
9520 and in case doing stupid register allocation. */
9522 if (storage_class == sc_register)
9523 DECL_REGISTER (decl) = 1;
9524 else if (storage_class == sc_extern)
9525 DECL_THIS_EXTERN (decl) = 1;
9526 else if (storage_class == sc_static)
9527 DECL_THIS_STATIC (decl) = 1;
9529 /* Record constancy and volatility on the DECL itself . There's
9530 no need to do this when processing a template; we'll do this
9531 for the instantiated declaration based on the type of DECL. */
9532 if (!processing_template_decl)
9533 cp_apply_type_quals_to_decl (type_quals, decl);
9539 /* Subroutine of start_function. Ensure that each of the parameter
9540 types (as listed in PARMS) is complete, as is required for a
9541 function definition. */
9544 require_complete_types_for_parms (tree parms)
9546 for (; parms; parms = TREE_CHAIN (parms))
9548 if (dependent_type_p (TREE_TYPE (parms)))
9550 if (!VOID_TYPE_P (TREE_TYPE (parms))
9551 && complete_type_or_else (TREE_TYPE (parms), parms))
9553 relayout_decl (parms);
9554 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9557 /* grokparms or complete_type_or_else will have already issued
9559 TREE_TYPE (parms) = error_mark_node;
9563 /* Returns nonzero if T is a local variable. */
9566 local_variable_p (const_tree t)
9568 if ((TREE_CODE (t) == VAR_DECL
9569 /* A VAR_DECL with a context that is a _TYPE is a static data
9571 && !TYPE_P (CP_DECL_CONTEXT (t))
9572 /* Any other non-local variable must be at namespace scope. */
9573 && !DECL_NAMESPACE_SCOPE_P (t))
9574 || (TREE_CODE (t) == PARM_DECL))
9580 /* Like local_variable_p, but suitable for use as a tree-walking
9584 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9585 void *data ATTRIBUTE_UNUSED)
9587 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9589 else if (TYPE_P (*tp))
9596 /* Check that ARG, which is a default-argument expression for a
9597 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9598 something goes wrong. DECL may also be a _TYPE node, rather than a
9599 DECL, if there is no DECL available. */
9602 check_default_argument (tree decl, tree arg)
9607 if (TREE_CODE (arg) == DEFAULT_ARG)
9608 /* We get a DEFAULT_ARG when looking at an in-class declaration
9609 with a default argument. Ignore the argument for now; we'll
9610 deal with it after the class is complete. */
9619 decl_type = TREE_TYPE (decl);
9621 if (arg == error_mark_node
9622 || decl == error_mark_node
9623 || TREE_TYPE (arg) == error_mark_node
9624 || decl_type == error_mark_node)
9625 /* Something already went wrong. There's no need to check
9627 return error_mark_node;
9629 /* [dcl.fct.default]
9631 A default argument expression is implicitly converted to the
9633 if (!TREE_TYPE (arg)
9634 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9637 error ("default argument for %q#D has type %qT",
9638 decl, TREE_TYPE (arg));
9640 error ("default argument for parameter of type %qT has type %qT",
9641 decl_type, TREE_TYPE (arg));
9643 return error_mark_node;
9646 /* [dcl.fct.default]
9648 Local variables shall not be used in default argument
9651 The keyword `this' shall not be used in a default argument of a
9653 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9656 error ("default argument %qE uses local variable %qD", arg, var);
9657 return error_mark_node;
9664 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9667 type_is_deprecated (tree type)
9669 enum tree_code code;
9670 if (TREE_DEPRECATED (type))
9672 if (TYPE_NAME (type)
9673 && TREE_DEPRECATED (TYPE_NAME (type)))
9676 code = TREE_CODE (type);
9678 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9679 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9680 || code == METHOD_TYPE || code == ARRAY_TYPE)
9681 return type_is_deprecated (TREE_TYPE (type));
9683 if (TYPE_PTRMEMFUNC_P (type))
9684 return type_is_deprecated
9685 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9690 /* Decode the list of parameter types for a function type.
9691 Given the list of things declared inside the parens,
9692 return a list of types.
9694 If this parameter does not end with an ellipsis, we append
9697 *PARMS is set to the chain of PARM_DECLs created. */
9700 grokparms (tree parmlist, tree *parms)
9702 tree result = NULL_TREE;
9703 tree decls = NULL_TREE;
9707 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9709 tree type = NULL_TREE;
9710 tree init = TREE_PURPOSE (parm);
9711 tree decl = TREE_VALUE (parm);
9713 if (parm == void_list_node)
9716 if (! decl || TREE_TYPE (decl) == error_mark_node)
9719 type = TREE_TYPE (decl);
9720 if (VOID_TYPE_P (type))
9722 if (same_type_p (type, void_type_node)
9723 && DECL_SELF_REFERENCE_P (type)
9724 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9725 /* this is a parmlist of `(void)', which is ok. */
9727 cxx_incomplete_type_error (decl, type);
9728 /* It's not a good idea to actually create parameters of
9729 type `void'; other parts of the compiler assume that a
9730 void type terminates the parameter list. */
9731 type = error_mark_node;
9732 TREE_TYPE (decl) = error_mark_node;
9735 if (type != error_mark_node
9736 && TYPE_FOR_JAVA (type)
9737 && MAYBE_CLASS_TYPE_P (type))
9739 error ("parameter %qD has Java class type", decl);
9740 type = error_mark_node;
9741 TREE_TYPE (decl) = error_mark_node;
9745 if (type != error_mark_node)
9747 if (deprecated_state != DEPRECATED_SUPPRESS)
9749 tree deptype = type_is_deprecated (type);
9751 warn_deprecated_use (deptype);
9754 /* Top-level qualifiers on the parameters are
9755 ignored for function types. */
9756 type = cp_build_qualified_type (type, 0);
9757 if (TREE_CODE (type) == METHOD_TYPE)
9759 error ("parameter %qD invalidly declared method type", decl);
9760 type = build_pointer_type (type);
9761 TREE_TYPE (decl) = type;
9763 else if (abstract_virtuals_error (decl, type))
9764 any_error = 1; /* Seems like a good idea. */
9765 else if (POINTER_TYPE_P (type))
9767 /* [dcl.fct]/6, parameter types cannot contain pointers
9768 (references) to arrays of unknown bound. */
9769 tree t = TREE_TYPE (type);
9770 int ptr = TYPE_PTR_P (type);
9776 else if (TREE_CODE (t) != ARRAY_TYPE)
9778 else if (!TYPE_DOMAIN (t))
9782 if (TREE_CODE (t) == ARRAY_TYPE)
9783 error ("parameter %qD includes %s to array of unknown "
9785 decl, ptr ? "pointer" : "reference", t);
9790 else if (init && !processing_template_decl)
9791 init = check_default_argument (decl, init);
9794 if (TREE_CODE (decl) == PARM_DECL
9795 && FUNCTION_PARAMETER_PACK_P (decl)
9796 && TREE_CHAIN (parm)
9797 && TREE_CHAIN (parm) != void_list_node)
9798 error ("parameter packs must be at the end of the parameter list");
9800 TREE_CHAIN (decl) = decls;
9802 result = tree_cons (init, type, result);
9804 decls = nreverse (decls);
9805 result = nreverse (result);
9807 result = chainon (result, void_list_node);
9814 /* D is a constructor or overloaded `operator='.
9816 Let T be the class in which D is declared. Then, this function
9819 -1 if D's is an ill-formed constructor or copy assignment operator
9820 whose first parameter is of type `T'.
9821 0 if D is not a copy constructor or copy assignment
9823 1 if D is a copy constructor or copy assignment operator whose
9824 first parameter is a reference to const qualified T.
9825 2 if D is a copy constructor or copy assignment operator whose
9826 first parameter is a reference to non-const qualified T.
9828 This function can be used as a predicate. Positive values indicate
9829 a copy constructor and nonzero values indicate a copy assignment
9833 copy_fn_p (const_tree d)
9839 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9841 if (TREE_CODE (d) == TEMPLATE_DECL
9842 || (DECL_TEMPLATE_INFO (d)
9843 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9844 /* Instantiations of template member functions are never copy
9845 functions. Note that member functions of templated classes are
9846 represented as template functions internally, and we must
9847 accept those as copy functions. */
9850 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9854 arg_type = TREE_VALUE (args);
9855 if (arg_type == error_mark_node)
9858 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9860 /* Pass by value copy assignment operator. */
9863 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9864 && !TYPE_REF_IS_RVALUE (arg_type)
9865 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9867 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9873 args = TREE_CHAIN (args);
9875 if (args && args != void_list_node && !TREE_PURPOSE (args))
9876 /* There are more non-optional args. */
9882 /* D is a constructor or overloaded `operator='.
9884 Let T be the class in which D is declared. Then, this function
9885 returns true when D is a move constructor or move assignment
9886 operator, false otherwise. */
9889 move_fn_p (const_tree d)
9893 bool result = false;
9895 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9897 if (cxx_dialect == cxx98)
9898 /* There are no move constructors if we are in C++98 mode. */
9901 if (TREE_CODE (d) == TEMPLATE_DECL
9902 || (DECL_TEMPLATE_INFO (d)
9903 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9904 /* Instantiations of template member functions are never copy
9905 functions. Note that member functions of templated classes are
9906 represented as template functions internally, and we must
9907 accept those as copy functions. */
9910 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9914 arg_type = TREE_VALUE (args);
9915 if (arg_type == error_mark_node)
9918 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9919 && TYPE_REF_IS_RVALUE (arg_type)
9920 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9924 args = TREE_CHAIN (args);
9926 if (args && args != void_list_node && !TREE_PURPOSE (args))
9927 /* There are more non-optional args. */
9933 /* Remember any special properties of member function DECL. */
9935 #define DECL_DEFAULTED_IN_CLASS_P(DECL) \
9936 (DECL_DEFAULTED_FN (DECL) \
9937 && (DECL_ARTIFICIAL (DECL) || DECL_INITIALIZED_IN_CLASS_P (DECL)))
9940 grok_special_member_properties (tree decl)
9944 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9947 class_type = DECL_CONTEXT (decl);
9948 if (DECL_CONSTRUCTOR_P (decl))
9950 int ctor = copy_fn_p (decl);
9952 if (!DECL_ARTIFICIAL (decl))
9953 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9959 A non-template constructor for class X is a copy
9960 constructor if its first parameter is of type X&, const
9961 X&, volatile X& or const volatile X&, and either there
9962 are no other parameters or else all other parameters have
9963 default arguments. */
9964 TYPE_HAS_INIT_REF (class_type) = 1;
9965 if (!DECL_DEFAULTED_IN_CLASS_P (decl))
9966 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9968 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9970 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9972 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9973 if (TREE_CODE (decl) == TEMPLATE_DECL
9974 || !DECL_DEFAULTED_IN_CLASS_P (decl))
9975 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
9977 else if (is_list_ctor (decl))
9978 TYPE_HAS_LIST_CTOR (class_type) = 1;
9980 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9984 A non-template assignment operator for class X is a copy
9985 assignment operator if its parameter is of type X, X&, const
9986 X&, volatile X& or const volatile X&. */
9988 int assop = copy_fn_p (decl);
9992 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9993 if (!DECL_DEFAULTED_IN_CLASS_P (decl))
9994 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
9996 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
10001 /* Check a constructor DECL has the correct form. Complains
10002 if the class has a constructor of the form X(X). */
10005 grok_ctor_properties (const_tree ctype, const_tree decl)
10007 int ctor_parm = copy_fn_p (decl);
10013 A declaration of a constructor for a class X is ill-formed if
10014 its first parameter is of type (optionally cv-qualified) X
10015 and either there are no other parameters or else all other
10016 parameters have default arguments.
10018 We *don't* complain about member template instantiations that
10019 have this form, though; they can occur as we try to decide
10020 what constructor to use during overload resolution. Since
10021 overload resolution will never prefer such a constructor to
10022 the non-template copy constructor (which is either explicitly
10023 or implicitly defined), there's no need to worry about their
10024 existence. Theoretically, they should never even be
10025 instantiated, but that's hard to forestall. */
10026 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10034 /* An operator with this code is unary, but can also be binary. */
10037 ambi_op_p (enum tree_code code)
10039 return (code == INDIRECT_REF
10040 || code == ADDR_EXPR
10041 || code == UNARY_PLUS_EXPR
10042 || code == NEGATE_EXPR
10043 || code == PREINCREMENT_EXPR
10044 || code == PREDECREMENT_EXPR);
10047 /* An operator with this name can only be unary. */
10050 unary_op_p (enum tree_code code)
10052 return (code == TRUTH_NOT_EXPR
10053 || code == BIT_NOT_EXPR
10054 || code == COMPONENT_REF
10055 || code == TYPE_EXPR);
10058 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10059 errors are issued for invalid declarations. */
10062 grok_op_properties (tree decl, bool complain)
10064 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10066 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10067 tree name = DECL_NAME (decl);
10068 enum tree_code operator_code;
10073 /* Count the number of arguments and check for ellipsis. */
10074 for (argtype = argtypes, arity = 0;
10075 argtype && argtype != void_list_node;
10076 argtype = TREE_CHAIN (argtype))
10078 ellipsis_p = !argtype;
10080 class_type = DECL_CONTEXT (decl);
10081 if (class_type && !CLASS_TYPE_P (class_type))
10082 class_type = NULL_TREE;
10084 if (DECL_CONV_FN_P (decl))
10085 operator_code = TYPE_EXPR;
10089 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10090 if (ansi_opname (CODE) == name) \
10092 operator_code = (CODE); \
10095 else if (ansi_assopname (CODE) == name) \
10097 operator_code = (CODE); \
10098 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10102 #include "operators.def"
10103 #undef DEF_OPERATOR
10105 gcc_unreachable ();
10108 gcc_assert (operator_code != MAX_TREE_CODES);
10109 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10112 switch (operator_code)
10115 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10119 TYPE_GETS_DELETE (class_type) |= 1;
10123 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10126 case VEC_DELETE_EXPR:
10127 TYPE_GETS_DELETE (class_type) |= 2;
10134 /* [basic.std.dynamic.allocation]/1:
10136 A program is ill-formed if an allocation function is declared
10137 in a namespace scope other than global scope or declared static
10140 The same also holds true for deallocation functions. */
10141 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10142 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10144 if (DECL_NAMESPACE_SCOPE_P (decl))
10146 if (CP_DECL_CONTEXT (decl) != global_namespace)
10148 error ("%qD may not be declared within a namespace", decl);
10151 else if (!TREE_PUBLIC (decl))
10153 error ("%qD may not be declared as static", decl);
10159 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10161 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10162 DECL_IS_OPERATOR_NEW (decl) = 1;
10164 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10165 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10168 /* An operator function must either be a non-static member function
10169 or have at least one parameter of a class, a reference to a class,
10170 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10171 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10173 if (operator_code == TYPE_EXPR
10174 || operator_code == CALL_EXPR
10175 || operator_code == COMPONENT_REF
10176 || operator_code == ARRAY_REF
10177 || operator_code == NOP_EXPR)
10179 error ("%qD must be a nonstatic member function", decl);
10186 if (DECL_STATIC_FUNCTION_P (decl))
10188 error ("%qD must be either a non-static member "
10189 "function or a non-member function", decl);
10193 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10195 tree arg = non_reference (TREE_VALUE (p));
10196 if (arg == error_mark_node)
10199 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10200 because these checks are performed even on
10201 template functions. */
10202 if (MAYBE_CLASS_TYPE_P (arg)
10203 || TREE_CODE (arg) == ENUMERAL_TYPE)
10207 if (!p || p == void_list_node)
10210 error ("%qD must have an argument of class or "
10211 "enumerated type", decl);
10217 /* There are no restrictions on the arguments to an overloaded
10219 if (operator_code == CALL_EXPR)
10222 /* Warn about conversion operators that will never be used. */
10223 if (IDENTIFIER_TYPENAME_P (name)
10224 && ! DECL_TEMPLATE_INFO (decl)
10226 /* Warn only declaring the function; there is no need to
10227 warn again about out-of-class definitions. */
10228 && class_type == current_class_type)
10230 tree t = TREE_TYPE (name);
10231 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10232 const char *what = 0;
10235 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10237 if (TREE_CODE (t) == VOID_TYPE)
10239 else if (class_type)
10241 if (t == class_type)
10242 what = "the same type";
10243 /* Don't force t to be complete here. */
10244 else if (MAYBE_CLASS_TYPE_P (t)
10245 && COMPLETE_TYPE_P (t)
10246 && DERIVED_FROM_P (t, class_type))
10247 what = "a base class";
10251 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10252 "conversion operator",
10253 ref ? "a reference to " : "", what);
10256 if (operator_code == COND_EXPR)
10259 error ("ISO C++ prohibits overloading operator ?:");
10262 else if (ellipsis_p)
10264 error ("%qD must not have variable number of arguments", decl);
10267 else if (ambi_op_p (operator_code))
10270 /* We pick the one-argument operator codes by default, so
10271 we don't have to change anything. */
10273 else if (arity == 2)
10275 /* If we thought this was a unary operator, we now know
10276 it to be a binary operator. */
10277 switch (operator_code)
10280 operator_code = MULT_EXPR;
10284 operator_code = BIT_AND_EXPR;
10287 case UNARY_PLUS_EXPR:
10288 operator_code = PLUS_EXPR;
10292 operator_code = MINUS_EXPR;
10295 case PREINCREMENT_EXPR:
10296 operator_code = POSTINCREMENT_EXPR;
10299 case PREDECREMENT_EXPR:
10300 operator_code = POSTDECREMENT_EXPR;
10304 gcc_unreachable ();
10307 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10309 if ((operator_code == POSTINCREMENT_EXPR
10310 || operator_code == POSTDECREMENT_EXPR)
10311 && ! processing_template_decl
10312 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10315 error ("postfix %qD must take %<int%> as its argument",
10318 error ("postfix %qD must take %<int%> as its second "
10326 error ("%qD must take either zero or one argument", decl);
10328 error ("%qD must take either one or two arguments", decl);
10332 /* More Effective C++ rule 6. */
10334 && (operator_code == POSTINCREMENT_EXPR
10335 || operator_code == POSTDECREMENT_EXPR
10336 || operator_code == PREINCREMENT_EXPR
10337 || operator_code == PREDECREMENT_EXPR))
10339 tree arg = TREE_VALUE (argtypes);
10340 tree ret = TREE_TYPE (TREE_TYPE (decl));
10341 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10342 arg = TREE_TYPE (arg);
10343 arg = TYPE_MAIN_VARIANT (arg);
10344 if (operator_code == PREINCREMENT_EXPR
10345 || operator_code == PREDECREMENT_EXPR)
10347 if (TREE_CODE (ret) != REFERENCE_TYPE
10348 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10350 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10351 build_reference_type (arg));
10355 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10356 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10360 else if (unary_op_p (operator_code))
10365 error ("%qD must take %<void%>", decl);
10367 error ("%qD must take exactly one argument", decl);
10371 else /* if (binary_op_p (operator_code)) */
10376 error ("%qD must take exactly one argument", decl);
10378 error ("%qD must take exactly two arguments", decl);
10382 /* More Effective C++ rule 7. */
10384 && (operator_code == TRUTH_ANDIF_EXPR
10385 || operator_code == TRUTH_ORIF_EXPR
10386 || operator_code == COMPOUND_EXPR))
10387 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10391 /* Effective C++ rule 23. */
10394 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10395 && (operator_code == PLUS_EXPR
10396 || operator_code == MINUS_EXPR
10397 || operator_code == TRUNC_DIV_EXPR
10398 || operator_code == MULT_EXPR
10399 || operator_code == TRUNC_MOD_EXPR)
10400 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10401 warning (OPT_Weffc__, "%qD should return by value", decl);
10403 /* [over.oper]/8 */
10404 for (; argtypes && argtypes != void_list_node;
10405 argtypes = TREE_CHAIN (argtypes))
10406 if (TREE_PURPOSE (argtypes))
10408 TREE_PURPOSE (argtypes) = NULL_TREE;
10409 if (operator_code == POSTINCREMENT_EXPR
10410 || operator_code == POSTDECREMENT_EXPR)
10412 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10417 error ("%qD cannot have default arguments", decl);
10425 /* Return a string giving the keyword associate with CODE. */
10427 static const char *
10428 tag_name (enum tag_types code)
10440 case typename_type:
10443 gcc_unreachable ();
10447 /* Name lookup in an elaborated-type-specifier (after the keyword
10448 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10449 elaborated-type-specifier is invalid, issue a diagnostic and return
10450 error_mark_node; otherwise, return the *_TYPE to which it referred.
10451 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10454 check_elaborated_type_specifier (enum tag_types tag_code,
10456 bool allow_template_p)
10462 struct S { struct S *p; };
10464 name lookup will find the TYPE_DECL for the implicit "S::S"
10465 typedef. Adjust for that here. */
10466 if (DECL_SELF_REFERENCE_P (decl))
10467 decl = TYPE_NAME (TREE_TYPE (decl));
10469 type = TREE_TYPE (decl);
10471 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10472 is false for this case as well. */
10473 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10475 error ("using template type parameter %qT after %qs",
10476 type, tag_name (tag_code));
10477 return error_mark_node;
10481 If the identifier resolves to a typedef-name or a template
10482 type-parameter, the elaborated-type-specifier is ill-formed.
10484 In other words, the only legitimate declaration to use in the
10485 elaborated type specifier is the implicit typedef created when
10486 the type is declared. */
10487 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10488 && tag_code != typename_type)
10490 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10491 error ("%q+D has a previous declaration here", decl);
10492 return error_mark_node;
10494 else if (TREE_CODE (type) != RECORD_TYPE
10495 && TREE_CODE (type) != UNION_TYPE
10496 && tag_code != enum_type
10497 && tag_code != typename_type)
10499 error ("%qT referred to as %qs", type, tag_name (tag_code));
10500 error ("%q+T has a previous declaration here", type);
10501 return error_mark_node;
10503 else if (TREE_CODE (type) != ENUMERAL_TYPE
10504 && tag_code == enum_type)
10506 error ("%qT referred to as enum", type);
10507 error ("%q+T has a previous declaration here", type);
10508 return error_mark_node;
10510 else if (!allow_template_p
10511 && TREE_CODE (type) == RECORD_TYPE
10512 && CLASSTYPE_IS_TEMPLATE (type))
10514 /* If a class template appears as elaborated type specifier
10515 without a template header such as:
10517 template <class T> class C {};
10518 void f(class C); // No template header here
10520 then the required template argument is missing. */
10521 error ("template argument required for %<%s %T%>",
10522 tag_name (tag_code),
10523 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10524 return error_mark_node;
10530 /* Lookup NAME in elaborate type specifier in scope according to
10531 SCOPE and issue diagnostics if necessary.
10532 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10533 found, and ERROR_MARK_NODE for type error. */
10536 lookup_and_check_tag (enum tag_types tag_code, tree name,
10537 tag_scope scope, bool template_header_p)
10541 if (scope == ts_global)
10543 /* First try ordinary name lookup, ignoring hidden class name
10544 injected via friend declaration. */
10545 decl = lookup_name_prefer_type (name, 2);
10546 /* If that fails, the name will be placed in the smallest
10547 non-class, non-function-prototype scope according to 3.3.1/5.
10548 We may already have a hidden name declared as friend in this
10549 scope. So lookup again but not ignoring hidden names.
10550 If we find one, that name will be made visible rather than
10551 creating a new tag. */
10553 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10556 decl = lookup_type_scope (name, scope);
10558 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10559 decl = DECL_TEMPLATE_RESULT (decl);
10561 if (decl && TREE_CODE (decl) == TYPE_DECL)
10563 /* Look for invalid nested type:
10567 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10569 error ("%qD has the same name as the class in which it is "
10572 return error_mark_node;
10575 /* Two cases we need to consider when deciding if a class
10576 template is allowed as an elaborated type specifier:
10577 1. It is a self reference to its own class.
10578 2. It comes with a template header.
10582 template <class T> class C {
10583 class C *c1; // DECL_SELF_REFERENCE_P is true
10586 template <class U> class C; // template_header_p is true
10587 template <class T> class C<T>::D {
10588 class C *c2; // DECL_SELF_REFERENCE_P is true
10591 t = check_elaborated_type_specifier (tag_code,
10594 | DECL_SELF_REFERENCE_P (decl));
10597 else if (decl && TREE_CODE (decl) == TREE_LIST)
10599 error ("reference to %qD is ambiguous", name);
10600 print_candidates (decl);
10601 return error_mark_node;
10607 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10608 Define the tag as a forward-reference if it is not defined.
10610 If a declaration is given, process it here, and report an error if
10611 multiple declarations are not identical.
10613 SCOPE is TS_CURRENT when this is also a definition. Only look in
10614 the current frame for the name (since C++ allows new names in any
10615 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10616 declaration. Only look beginning from the current scope outward up
10617 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10619 TEMPLATE_HEADER_P is true when this declaration is preceded by
10620 a set of template parameters. */
10623 xref_tag (enum tag_types tag_code, tree name,
10624 tag_scope scope, bool template_header_p)
10626 enum tree_code code;
10628 tree context = NULL_TREE;
10630 timevar_push (TV_NAME_LOOKUP);
10632 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10638 code = RECORD_TYPE;
10644 code = ENUMERAL_TYPE;
10647 gcc_unreachable ();
10650 /* In case of anonymous name, xref_tag is only called to
10651 make type node and push name. Name lookup is not required. */
10652 if (ANON_AGGRNAME_P (name))
10655 t = lookup_and_check_tag (tag_code, name,
10656 scope, template_header_p);
10658 if (t == error_mark_node)
10659 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10661 if (scope != ts_current && t && current_class_type
10662 && template_class_depth (current_class_type)
10663 && template_header_p)
10665 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10666 definition of this tag. Since, in addition, we are currently
10667 processing a (member) template declaration of a template
10668 class, we must be very careful; consider:
10675 { template <class V>
10676 friend struct S1; };
10678 Here, the S2::S1 declaration should not be confused with the
10679 outer declaration. In particular, the inner version should
10680 have a template parameter of level 2, not level 1. This
10681 would be particularly important if the member declaration
10684 template <class V = U> friend struct S1;
10686 say, when we should tsubst into `U' when instantiating
10687 S2. On the other hand, when presented with:
10697 we must find the inner binding eventually. We
10698 accomplish this by making sure that the new type we
10699 create to represent this declaration has the right
10701 context = TYPE_CONTEXT (t);
10707 /* If no such tag is yet defined, create a forward-reference node
10708 and record it as the "definition".
10709 When a real declaration of this type is found,
10710 the forward-reference will be altered into a real type. */
10711 if (code == ENUMERAL_TYPE)
10713 error ("use of enum %q#D without previous declaration", name);
10714 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10718 t = make_class_type (code);
10719 TYPE_CONTEXT (t) = context;
10720 t = pushtag (name, t, scope);
10725 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10727 if (!redeclare_class_template (t, current_template_parms))
10728 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10730 else if (!processing_template_decl
10731 && CLASS_TYPE_P (t)
10732 && CLASSTYPE_IS_TEMPLATE (t))
10734 error ("redeclaration of %qT as a non-template", t);
10735 error ("previous declaration %q+D", t);
10736 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10739 /* Make injected friend class visible. */
10740 if (scope != ts_within_enclosing_non_class
10741 && hidden_name_p (TYPE_NAME (t)))
10743 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10744 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10746 if (TYPE_TEMPLATE_INFO (t))
10748 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10749 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10754 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10758 xref_tag_from_type (tree old, tree id, tag_scope scope)
10760 enum tag_types tag_kind;
10762 if (TREE_CODE (old) == RECORD_TYPE)
10763 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10765 tag_kind = union_type;
10767 if (id == NULL_TREE)
10768 id = TYPE_IDENTIFIER (old);
10770 return xref_tag (tag_kind, id, scope, false);
10773 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10774 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10775 access_* node, and the TREE_VALUE is the type of the base-class.
10776 Non-NULL TREE_TYPE indicates virtual inheritance.
10778 Returns true if the binfo hierarchy was successfully created,
10779 false if an error was detected. */
10782 xref_basetypes (tree ref, tree base_list)
10785 tree binfo, base_binfo;
10786 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10787 unsigned max_bases = 0; /* Maximum direct bases. */
10789 tree default_access;
10790 tree igo_prev; /* Track Inheritance Graph Order. */
10792 if (ref == error_mark_node)
10795 /* The base of a derived class is private by default, all others are
10797 default_access = (TREE_CODE (ref) == RECORD_TYPE
10798 && CLASSTYPE_DECLARED_CLASS (ref)
10799 ? access_private_node : access_public_node);
10801 /* First, make sure that any templates in base-classes are
10802 instantiated. This ensures that if we call ourselves recursively
10803 we do not get confused about which classes are marked and which
10805 basep = &base_list;
10808 tree basetype = TREE_VALUE (*basep);
10810 if (!(processing_template_decl && uses_template_parms (basetype))
10811 && !complete_type_or_else (basetype, NULL))
10812 /* An incomplete type. Remove it from the list. */
10813 *basep = TREE_CHAIN (*basep);
10817 if (TREE_TYPE (*basep))
10819 if (CLASS_TYPE_P (basetype))
10820 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10821 basep = &TREE_CHAIN (*basep);
10825 TYPE_MARKED_P (ref) = 1;
10827 /* The binfo slot should be empty, unless this is an (ill-formed)
10829 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10830 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10832 binfo = make_tree_binfo (max_bases);
10834 TYPE_BINFO (ref) = binfo;
10835 BINFO_OFFSET (binfo) = size_zero_node;
10836 BINFO_TYPE (binfo) = ref;
10840 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10841 /* An aggregate cannot have baseclasses. */
10842 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10844 if (TREE_CODE (ref) == UNION_TYPE)
10846 error ("derived union %qT invalid", ref);
10853 if (TYPE_FOR_JAVA (ref))
10855 error ("Java class %qT cannot have multiple bases", ref);
10862 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10864 if (TYPE_FOR_JAVA (ref))
10866 error ("Java class %qT cannot have virtual bases", ref);
10871 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10873 tree access = TREE_PURPOSE (base_list);
10874 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10875 tree basetype = TREE_VALUE (base_list);
10877 if (access == access_default_node)
10878 access = default_access;
10880 if (PACK_EXPANSION_P (basetype))
10881 basetype = PACK_EXPANSION_PATTERN (basetype);
10882 if (TREE_CODE (basetype) == TYPE_DECL)
10883 basetype = TREE_TYPE (basetype);
10884 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10886 error ("base type %qT fails to be a struct or class type",
10891 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10892 TYPE_FOR_JAVA (ref) = 1;
10894 base_binfo = NULL_TREE;
10895 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10897 base_binfo = TYPE_BINFO (basetype);
10898 /* The original basetype could have been a typedef'd type. */
10899 basetype = BINFO_TYPE (base_binfo);
10901 /* Inherit flags from the base. */
10902 TYPE_HAS_NEW_OPERATOR (ref)
10903 |= TYPE_HAS_NEW_OPERATOR (basetype);
10904 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10905 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10906 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10907 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10908 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10909 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10910 CLASSTYPE_REPEATED_BASE_P (ref)
10911 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10914 /* We must do this test after we've seen through a typedef
10916 if (TYPE_MARKED_P (basetype))
10918 if (basetype == ref)
10919 error ("recursive type %qT undefined", basetype);
10921 error ("duplicate base type %qT invalid", basetype);
10925 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10926 /* Regenerate the pack expansion for the bases. */
10927 basetype = make_pack_expansion (basetype);
10929 TYPE_MARKED_P (basetype) = 1;
10931 base_binfo = copy_binfo (base_binfo, basetype, ref,
10932 &igo_prev, via_virtual);
10933 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10934 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10936 BINFO_BASE_APPEND (binfo, base_binfo);
10937 BINFO_BASE_ACCESS_APPEND (binfo, access);
10940 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10941 /* If we have space in the vbase vector, we must have shared at
10942 least one of them, and are therefore diamond shaped. */
10943 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10945 /* Unmark all the types. */
10946 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10947 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10948 TYPE_MARKED_P (ref) = 0;
10950 /* Now see if we have a repeated base type. */
10951 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10953 for (base_binfo = binfo; base_binfo;
10954 base_binfo = TREE_CHAIN (base_binfo))
10956 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10958 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10961 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10963 for (base_binfo = binfo; base_binfo;
10964 base_binfo = TREE_CHAIN (base_binfo))
10965 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10966 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10975 /* Begin compiling the definition of an enumeration type.
10978 UNDERLYING_TYPE is the type that will be used as the storage for
10979 the enumeration type. This should be NULL_TREE if no storage type
10982 SCOPED_ENUM_P is true if this is a scoped enumeration type.
10984 Returns the type object, as yet incomplete.
10985 Also records info about it so that build_enumerator
10986 may be used to declare the individual values as they are read. */
10989 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
10993 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10995 /* If this is the real definition for a previous forward reference,
10996 fill in the contents in the same object that used to be the
10997 forward reference. */
10999 enumtype = lookup_and_check_tag (enum_type, name,
11000 /*tag_scope=*/ts_current,
11001 /*template_header_p=*/false);
11003 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11005 error ("multiple definition of %q#T", enumtype);
11006 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
11007 /* Clear out TYPE_VALUES, and start again. */
11008 TYPE_VALUES (enumtype) = NULL_TREE;
11012 /* In case of error, make a dummy enum to allow parsing to
11014 if (enumtype == error_mark_node)
11015 name = make_anon_name ();
11017 enumtype = make_node (ENUMERAL_TYPE);
11018 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11021 if (enumtype == error_mark_node)
11026 SET_SCOPED_ENUM_P (enumtype, 1);
11027 begin_scope (sk_scoped_enum, enumtype);
11029 /* [C++0x dcl.enum]p5:
11031 If not explicitly specified, the underlying type of a scoped
11032 enumeration type is int. */
11033 if (!underlying_type)
11034 underlying_type = integer_type_node;
11037 if (underlying_type)
11039 if (CP_INTEGRAL_TYPE_P (underlying_type))
11041 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11042 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11043 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11044 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11045 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11046 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11047 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11048 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11049 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11050 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11052 else if (!dependent_type_p (underlying_type))
11053 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11054 underlying_type, enumtype);
11060 /* After processing and defining all the values of an enumeration type,
11061 install their decls in the enumeration type and finish it off.
11062 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11065 finish_enum (tree enumtype)
11074 bool use_short_enum;
11078 integer_type_kind itk;
11079 tree underlying_type = NULL_TREE;
11080 bool fixed_underlying_type_p
11081 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11083 /* We built up the VALUES in reverse order. */
11084 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11086 /* For an enum defined in a template, just set the type of the values;
11087 all further processing is postponed until the template is
11088 instantiated. We need to set the type so that tsubst of a CONST_DECL
11090 if (processing_template_decl)
11092 for (values = TYPE_VALUES (enumtype);
11094 values = TREE_CHAIN (values))
11095 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11096 if (at_function_scope_p ())
11097 add_stmt (build_min (TAG_DEFN, enumtype));
11098 if (SCOPED_ENUM_P (enumtype))
11103 /* Determine the minimum and maximum values of the enumerators. */
11104 if (TYPE_VALUES (enumtype))
11106 minnode = maxnode = NULL_TREE;
11108 for (values = TYPE_VALUES (enumtype);
11110 values = TREE_CHAIN (values))
11112 decl = TREE_VALUE (values);
11114 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11115 each enumerator has the type of its enumeration. Prior to the
11116 closing brace, the type of each enumerator is the type of its
11117 initializing value. */
11118 TREE_TYPE (decl) = enumtype;
11120 /* Update the minimum and maximum values, if appropriate. */
11121 value = DECL_INITIAL (decl);
11122 if (value == error_mark_node)
11123 value = integer_zero_node;
11124 /* Figure out what the minimum and maximum values of the
11125 enumerators are. */
11127 minnode = maxnode = value;
11128 else if (tree_int_cst_lt (maxnode, value))
11130 else if (tree_int_cst_lt (value, minnode))
11137 If the enumerator-list is empty, the underlying type is as if
11138 the enumeration had a single enumerator with value 0. */
11139 minnode = maxnode = integer_zero_node;
11141 /* Compute the number of bits require to represent all values of the
11142 enumeration. We must do this before the type of MINNODE and
11143 MAXNODE are transformed, since tree_int_cst_min_precision relies
11144 on the TREE_TYPE of the value it is passed. */
11145 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11146 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11147 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11148 precision = MAX (lowprec, highprec);
11150 if (!fixed_underlying_type_p)
11152 /* Determine the underlying type of the enumeration.
11156 The underlying type of an enumeration is an integral type that
11157 can represent all the enumerator values defined in the
11158 enumeration. It is implementation-defined which integral type is
11159 used as the underlying type for an enumeration except that the
11160 underlying type shall not be larger than int unless the value of
11161 an enumerator cannot fit in an int or unsigned int.
11163 We use "int" or an "unsigned int" as the underlying type, even if
11164 a smaller integral type would work, unless the user has
11165 explicitly requested that we use the smallest possible type. The
11166 user can request that for all enumerations with a command line
11167 flag, or for just one enumeration with an attribute. */
11169 use_short_enum = flag_short_enums
11170 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11172 for (itk = (use_short_enum ? itk_char : itk_int);
11176 underlying_type = integer_types[itk];
11177 if (TYPE_PRECISION (underlying_type) >= precision
11178 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11181 if (itk == itk_none)
11185 IF no integral type can represent all the enumerator values, the
11186 enumeration is ill-formed. */
11187 error ("no integral type can represent all of the enumerator values "
11188 "for %qT", enumtype);
11189 precision = TYPE_PRECISION (long_long_integer_type_node);
11190 underlying_type = integer_types[itk_unsigned_long_long];
11195 The value of sizeof() applied to an enumeration type, an object
11196 of an enumeration type, or an enumerator, is the value of sizeof()
11197 applied to the underlying type. */
11198 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11199 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11200 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11201 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11202 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11203 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11205 /* Set the underlying type of the enumeration type to the
11206 computed enumeration type, restricted to the enumerator
11208 ENUM_UNDERLYING_TYPE (enumtype) = copy_node (underlying_type);
11209 set_min_and_max_values_for_integral_type
11210 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11213 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11215 /* Compute the minimum and maximum values for the type.
11219 For an enumeration where emin is the smallest enumerator and emax
11220 is the largest, the values of the enumeration are the values of the
11221 underlying type in the range bmin to bmax, where bmin and bmax are,
11222 respectively, the smallest and largest values of the smallest bit-
11223 field that can store emin and emax. */
11225 /* The middle-end currently assumes that types with TYPE_PRECISION
11226 narrower than their underlying type are suitably zero or sign
11227 extended to fill their mode. g++ doesn't make these guarantees.
11228 Until the middle-end can represent such paradoxical types, we
11229 set the TYPE_PRECISION to the width of the underlying type. */
11230 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11232 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11234 /* Convert each of the enumerators to the type of the underlying
11235 type of the enumeration. */
11236 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11238 location_t saved_location;
11240 decl = TREE_VALUE (values);
11241 saved_location = input_location;
11242 input_location = DECL_SOURCE_LOCATION (decl);
11243 if (fixed_underlying_type_p)
11244 /* If the enumeration type has a fixed underlying type, we
11245 already checked all of the enumerator values. */
11246 value = DECL_INITIAL (decl);
11248 value = perform_implicit_conversion (underlying_type,
11249 DECL_INITIAL (decl),
11250 tf_warning_or_error);
11251 input_location = saved_location;
11253 /* Do not clobber shared ints. */
11254 value = copy_node (value);
11256 TREE_TYPE (value) = enumtype;
11257 DECL_INITIAL (decl) = value;
11260 /* Fix up all variant types of this enum type. */
11261 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11263 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11264 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11265 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11266 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11267 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11268 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11269 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11270 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11271 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11272 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11273 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11276 /* Finish up the scope of a scoped enumeration. */
11277 if (SCOPED_ENUM_P (enumtype))
11280 /* Finish debugging output for this type. */
11281 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11284 /* Build and install a CONST_DECL for an enumeration constant of the
11285 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11286 Assignment of sequential values by default is handled here. */
11289 build_enumerator (tree name, tree value, tree enumtype)
11295 /* If the VALUE was erroneous, pretend it wasn't there; that will
11296 result in the enum being assigned the next value in sequence. */
11297 if (value == error_mark_node)
11300 /* Remove no-op casts from the value. */
11302 STRIP_TYPE_NOPS (value);
11304 if (! processing_template_decl)
11306 /* Validate and default VALUE. */
11307 if (value != NULL_TREE)
11309 value = integral_constant_value (value);
11311 if (TREE_CODE (value) == INTEGER_CST)
11313 value = perform_integral_promotions (value);
11314 constant_expression_warning (value);
11318 error ("enumerator value for %qD is not an integer constant", name);
11323 /* Default based on previous value. */
11324 if (value == NULL_TREE)
11326 if (TYPE_VALUES (enumtype))
11329 unsigned HOST_WIDE_INT lo;
11333 /* The next value is the previous value plus one.
11334 add_double doesn't know the type of the target expression,
11335 so we must check with int_fits_type_p as well. */
11336 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11337 if (error_operand_p (prev_value))
11338 value = error_mark_node;
11341 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11342 TREE_INT_CST_HIGH (prev_value),
11344 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11346 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11350 error ("overflow in enumeration values at %qD", name);
11351 value = error_mark_node;
11356 value = integer_zero_node;
11359 /* Remove no-op casts from the value. */
11360 STRIP_TYPE_NOPS (value);
11362 /* If the underlying type of the enum is fixed, check whether
11363 the enumerator values fits in the underlying type. If it
11364 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11365 if (ENUM_UNDERLYING_TYPE (enumtype)
11367 && TREE_CODE (value) == INTEGER_CST
11368 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11370 error ("enumerator value %E is too large for underlying type %<%T%>",
11371 value, ENUM_UNDERLYING_TYPE (enumtype));
11373 /* Silently convert the value so that we can continue. */
11374 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11379 /* C++ associates enums with global, function, or class declarations. */
11380 context = current_scope ();
11382 /* Build the actual enumeration constant. Note that the enumeration
11383 constants have the underlying type of the enum (if it is fixed)
11384 or the type of their initializer (if the underlying type of the
11385 enum is not fixed):
11389 If the underlying type is fixed, the type of each enumerator
11390 prior to the closing brace is the underlying type; if the
11391 initializing value of an enumerator cannot be represented by
11392 the underlying type, the program is ill-formed. If the
11393 underlying type is not fixed, the type of each enumerator is
11394 the type of its initializing value.
11396 If the underlying type is not fixed, it will be computed by
11397 finish_enum and we will reset the type of this enumerator. Of
11398 course, if we're processing a template, there may be no value. */
11399 type = value ? TREE_TYPE (value) : NULL_TREE;
11401 if (context && context == current_class_type)
11402 /* This enum declaration is local to the class. We need the full
11403 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11404 decl = build_lang_decl (CONST_DECL, name, type);
11406 /* It's a global enum, or it's local to a function. (Note local to
11407 a function could mean local to a class method. */
11408 decl = build_decl (CONST_DECL, name, type);
11410 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11411 TREE_CONSTANT (decl) = 1;
11412 TREE_READONLY (decl) = 1;
11413 DECL_INITIAL (decl) = value;
11415 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11416 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11417 on the TYPE_FIELDS list for `S'. (That's so that you can say
11418 things like `S::i' later.) */
11419 finish_member_declaration (decl);
11423 /* Add this enumeration constant to the list for this type. */
11424 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11427 /* Look for an enumerator with the given NAME within the enumeration
11428 type ENUMTYPE. This routine is used primarily for qualified name
11429 lookup into an enumerator in C++0x, e.g.,
11431 enum class Color { Red, Green, Blue };
11433 Color color = Color::Red;
11435 Returns the value corresponding to the enumerator, or
11436 NULL_TREE if no such enumerator was found. */
11438 lookup_enumerator (tree enumtype, tree name)
11441 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11443 e = purpose_member (name, TYPE_VALUES (enumtype));
11444 return e? TREE_VALUE (e) : NULL_TREE;
11448 /* We're defining DECL. Make sure that it's type is OK. */
11451 check_function_type (tree decl, tree current_function_parms)
11453 tree fntype = TREE_TYPE (decl);
11454 tree return_type = complete_type (TREE_TYPE (fntype));
11456 /* In a function definition, arg types must be complete. */
11457 require_complete_types_for_parms (current_function_parms);
11459 if (dependent_type_p (return_type))
11461 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11462 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11464 tree args = TYPE_ARG_TYPES (fntype);
11466 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11467 error ("return type %q#T is incomplete", return_type);
11469 error ("return type has Java class type %q#T", return_type);
11471 /* Make it return void instead. */
11472 if (TREE_CODE (fntype) == METHOD_TYPE)
11473 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11475 TREE_CHAIN (args));
11477 fntype = build_function_type (void_type_node, args);
11479 = build_exception_variant (fntype,
11480 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11483 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11486 /* Create the FUNCTION_DECL for a function definition.
11487 DECLSPECS and DECLARATOR are the parts of the declaration;
11488 they describe the function's name and the type it returns,
11489 but twisted together in a fashion that parallels the syntax of C.
11491 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11492 DECLARATOR is really the DECL for the function we are about to
11493 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11494 indicating that the function is an inline defined in-class.
11496 This function creates a binding context for the function body
11497 as well as setting up the FUNCTION_DECL in current_function_decl.
11499 For C++, we must first check whether that datum makes any sense.
11500 For example, "class A local_a(1,2);" means that variable local_a
11501 is an aggregate of type A, which should have a constructor
11502 applied to it with the argument list [1, 2].
11504 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11505 or may be a BLOCK if the function has been defined previously
11506 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11507 error_mark_node if the function has never been defined, or
11508 a BLOCK if the function has been defined somewhere. */
11511 start_preparsed_function (tree decl1, tree attrs, int flags)
11513 tree ctype = NULL_TREE;
11516 int doing_friend = 0;
11517 struct cp_binding_level *bl;
11518 tree current_function_parms;
11519 struct c_fileinfo *finfo
11520 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11521 bool honor_interface;
11523 /* Sanity check. */
11524 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11525 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11527 fntype = TREE_TYPE (decl1);
11528 if (TREE_CODE (fntype) == METHOD_TYPE)
11529 ctype = TYPE_METHOD_BASETYPE (fntype);
11531 /* ISO C++ 11.4/5. A friend function defined in a class is in
11532 the (lexical) scope of the class in which it is defined. */
11533 if (!ctype && DECL_FRIEND_P (decl1))
11535 ctype = DECL_FRIEND_CONTEXT (decl1);
11537 /* CTYPE could be null here if we're dealing with a template;
11538 for example, `inline friend float foo()' inside a template
11539 will have no CTYPE set. */
11540 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11546 if (DECL_DECLARED_INLINE_P (decl1)
11547 && lookup_attribute ("noinline", attrs))
11548 warning (0, "inline function %q+D given attribute noinline", decl1);
11550 /* Handle gnu_inline attribute. */
11551 if (GNU_INLINE_P (decl1))
11553 DECL_EXTERNAL (decl1) = 1;
11554 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11555 DECL_INTERFACE_KNOWN (decl1) = 1;
11556 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11559 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11560 /* This is a constructor, we must ensure that any default args
11561 introduced by this definition are propagated to the clones
11562 now. The clones are used directly in overload resolution. */
11563 adjust_clone_args (decl1);
11565 /* Sometimes we don't notice that a function is a static member, and
11566 build a METHOD_TYPE for it. Fix that up now. */
11567 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11568 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11570 revert_static_member_fn (decl1);
11574 /* Set up current_class_type, and enter the scope of the class, if
11577 push_nested_class (ctype);
11578 else if (DECL_STATIC_FUNCTION_P (decl1))
11579 push_nested_class (DECL_CONTEXT (decl1));
11581 /* Now that we have entered the scope of the class, we must restore
11582 the bindings for any template parameters surrounding DECL1, if it
11583 is an inline member template. (Order is important; consider the
11584 case where a template parameter has the same name as a field of
11585 the class.) It is not until after this point that
11586 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11587 if (flags & SF_INCLASS_INLINE)
11588 maybe_begin_member_template_processing (decl1);
11590 /* Effective C++ rule 15. */
11592 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11593 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11594 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11596 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11597 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11598 if (!DECL_INITIAL (decl1))
11599 DECL_INITIAL (decl1) = error_mark_node;
11601 /* This function exists in static storage.
11602 (This does not mean `static' in the C sense!) */
11603 TREE_STATIC (decl1) = 1;
11605 /* We must call push_template_decl after current_class_type is set
11606 up. (If we are processing inline definitions after exiting a
11607 class scope, current_class_type will be NULL_TREE until set above
11608 by push_nested_class.) */
11609 if (processing_template_decl)
11611 /* FIXME: Handle error_mark_node more gracefully. */
11612 tree newdecl1 = push_template_decl (decl1);
11613 if (newdecl1 != error_mark_node)
11617 /* We are now in the scope of the function being defined. */
11618 current_function_decl = decl1;
11620 /* Save the parm names or decls from this function's declarator
11621 where store_parm_decls will find them. */
11622 current_function_parms = DECL_ARGUMENTS (decl1);
11624 /* Make sure the parameter and return types are reasonable. When
11625 you declare a function, these types can be incomplete, but they
11626 must be complete when you define the function. */
11627 check_function_type (decl1, current_function_parms);
11629 /* Build the return declaration for the function. */
11630 restype = TREE_TYPE (fntype);
11631 if (DECL_RESULT (decl1) == NULL_TREE)
11635 resdecl = build_decl (RESULT_DECL, 0, restype);
11636 DECL_ARTIFICIAL (resdecl) = 1;
11637 DECL_IGNORED_P (resdecl) = 1;
11638 DECL_RESULT (decl1) = resdecl;
11640 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11643 /* Let the user know we're compiling this function. */
11644 announce_function (decl1);
11646 /* Record the decl so that the function name is defined.
11647 If we already have a decl for this name, and it is a FUNCTION_DECL,
11648 use the old decl. */
11649 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11651 /* A specialization is not used to guide overload resolution. */
11652 if (!DECL_FUNCTION_MEMBER_P (decl1)
11653 && !(DECL_USE_TEMPLATE (decl1) &&
11654 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11656 tree olddecl = pushdecl (decl1);
11658 if (olddecl == error_mark_node)
11659 /* If something went wrong when registering the declaration,
11660 use DECL1; we have to have a FUNCTION_DECL to use when
11661 parsing the body of the function. */
11665 /* Otherwise, OLDDECL is either a previous declaration
11666 of the same function or DECL1 itself. */
11668 if (warn_missing_declarations
11669 && olddecl == decl1
11670 && !DECL_MAIN_P (decl1)
11671 && TREE_PUBLIC (decl1)
11672 && !DECL_DECLARED_INLINE_P (decl1))
11676 /* Check whether DECL1 is in an anonymous
11678 for (context = DECL_CONTEXT (decl1);
11680 context = DECL_CONTEXT (context))
11682 if (TREE_CODE (context) == NAMESPACE_DECL
11683 && DECL_NAME (context) == NULL_TREE)
11687 if (context == NULL)
11688 warning (OPT_Wmissing_declarations,
11689 "no previous declaration for %q+D", decl1);
11697 /* We need to set the DECL_CONTEXT. */
11698 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11699 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11701 fntype = TREE_TYPE (decl1);
11703 /* If #pragma weak applies, mark the decl appropriately now.
11704 The pragma only applies to global functions. Because
11705 determining whether or not the #pragma applies involves
11706 computing the mangled name for the declaration, we cannot
11707 apply the pragma until after we have merged this declaration
11708 with any previous declarations; if the original declaration
11709 has a linkage specification, that specification applies to
11710 the definition as well, and may affect the mangled name. */
11711 if (!DECL_CONTEXT (decl1))
11712 maybe_apply_pragma_weak (decl1);
11715 /* Reset this in case the call to pushdecl changed it. */
11716 current_function_decl = decl1;
11718 gcc_assert (DECL_INITIAL (decl1));
11720 /* This function may already have been parsed, in which case just
11721 return; our caller will skip over the body without parsing. */
11722 if (DECL_INITIAL (decl1) != error_mark_node)
11725 /* Initialize RTL machinery. We cannot do this until
11726 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11727 even when processing a template; this is how we get
11728 CFUN set up, and our per-function variables initialized.
11729 FIXME factor out the non-RTL stuff. */
11730 bl = current_binding_level;
11731 allocate_struct_function (decl1, processing_template_decl);
11733 /* Initialize the language data structures. Whenever we start
11734 a new function, we destroy temporaries in the usual way. */
11735 cfun->language = GGC_CNEW (struct language_function);
11736 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11737 current_binding_level = bl;
11739 /* Even though we're inside a function body, we still don't want to
11740 call expand_expr to calculate the size of a variable-sized array.
11741 We haven't necessarily assigned RTL to all variables yet, so it's
11742 not safe to try to expand expressions involving them. */
11743 cfun->dont_save_pending_sizes_p = 1;
11745 /* Start the statement-tree, start the tree now. */
11746 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11748 /* If we are (erroneously) defining a function that we have already
11749 defined before, wipe out what we knew before. */
11750 if (!DECL_PENDING_INLINE_P (decl1))
11751 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11753 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11755 /* We know that this was set up by `grokclassfn'. We do not
11756 wait until `store_parm_decls', since evil parse errors may
11757 never get us to that point. Here we keep the consistency
11758 between `current_class_type' and `current_class_ptr'. */
11759 tree t = DECL_ARGUMENTS (decl1);
11761 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11762 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11764 cp_function_chain->x_current_class_ref
11765 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11766 cp_function_chain->x_current_class_ptr = t;
11768 /* Constructors and destructors need to know whether they're "in
11769 charge" of initializing virtual base classes. */
11770 t = TREE_CHAIN (t);
11771 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11773 current_in_charge_parm = t;
11774 t = TREE_CHAIN (t);
11776 if (DECL_HAS_VTT_PARM_P (decl1))
11778 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11779 current_vtt_parm = t;
11783 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11784 /* Implicitly-defined methods (like the
11785 destructor for a class in which no destructor
11786 is explicitly declared) must not be defined
11787 until their definition is needed. So, we
11788 ignore interface specifications for
11789 compiler-generated functions. */
11790 && !DECL_ARTIFICIAL (decl1));
11792 if (DECL_INTERFACE_KNOWN (decl1))
11794 tree ctx = decl_function_context (decl1);
11796 if (DECL_NOT_REALLY_EXTERN (decl1))
11797 DECL_EXTERNAL (decl1) = 0;
11799 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11800 && TREE_PUBLIC (ctx))
11801 /* This is a function in a local class in an extern inline
11803 comdat_linkage (decl1);
11805 /* If this function belongs to an interface, it is public.
11806 If it belongs to someone else's interface, it is also external.
11807 This only affects inlines and template instantiations. */
11808 else if (!finfo->interface_unknown && honor_interface)
11810 if (DECL_DECLARED_INLINE_P (decl1)
11811 || DECL_TEMPLATE_INSTANTIATION (decl1)
11812 || processing_template_decl)
11814 DECL_EXTERNAL (decl1)
11815 = (finfo->interface_only
11816 || (DECL_DECLARED_INLINE_P (decl1)
11817 && ! flag_implement_inlines
11818 && !DECL_VINDEX (decl1)));
11820 /* For WIN32 we also want to put these in linkonce sections. */
11821 maybe_make_one_only (decl1);
11824 DECL_EXTERNAL (decl1) = 0;
11825 DECL_INTERFACE_KNOWN (decl1) = 1;
11826 /* If this function is in an interface implemented in this file,
11827 make sure that the back end knows to emit this function
11829 if (!DECL_EXTERNAL (decl1))
11830 mark_needed (decl1);
11832 else if (finfo->interface_unknown && finfo->interface_only
11833 && honor_interface)
11835 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11836 interface, we will have both finfo->interface_unknown and
11837 finfo->interface_only set. In that case, we don't want to
11838 use the normal heuristics because someone will supply a
11839 #pragma implementation elsewhere, and deducing it here would
11840 produce a conflict. */
11841 comdat_linkage (decl1);
11842 DECL_EXTERNAL (decl1) = 0;
11843 DECL_INTERFACE_KNOWN (decl1) = 1;
11844 DECL_DEFER_OUTPUT (decl1) = 1;
11848 /* This is a definition, not a reference.
11849 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11850 if (!GNU_INLINE_P (decl1))
11851 DECL_EXTERNAL (decl1) = 0;
11853 if ((DECL_DECLARED_INLINE_P (decl1)
11854 || DECL_TEMPLATE_INSTANTIATION (decl1))
11855 && ! DECL_INTERFACE_KNOWN (decl1)
11856 /* Don't try to defer nested functions for now. */
11857 && ! decl_function_context (decl1))
11858 DECL_DEFER_OUTPUT (decl1) = 1;
11860 DECL_INTERFACE_KNOWN (decl1) = 1;
11863 /* Determine the ELF visibility attribute for the function. We must not
11864 do this before calling "pushdecl", as we must allow "duplicate_decls"
11865 to merge any attributes appropriately. We also need to wait until
11867 if (!DECL_CLONED_FUNCTION_P (decl1))
11868 determine_visibility (decl1);
11870 begin_scope (sk_function_parms, decl1);
11874 if (DECL_DESTRUCTOR_P (decl1)
11875 || (DECL_CONSTRUCTOR_P (decl1)
11876 && targetm.cxx.cdtor_returns_this ()))
11878 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
11879 DECL_CONTEXT (cdtor_label) = current_function_decl;
11882 start_fname_decls ();
11884 store_parm_decls (current_function_parms);
11888 /* Like start_preparsed_function, except that instead of a
11889 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11891 Returns 1 on success. If the DECLARATOR is not suitable for a function
11892 (it defines a datum instead), we return 0, which tells
11893 yyparse to report a parse error. */
11896 start_function (cp_decl_specifier_seq *declspecs,
11897 const cp_declarator *declarator,
11902 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11903 if (decl1 == error_mark_node)
11905 /* If the declarator is not suitable for a function definition,
11906 cause a syntax error. */
11907 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11909 error ("invalid function declaration");
11913 if (DECL_MAIN_P (decl1))
11914 /* main must return int. grokfndecl should have corrected it
11915 (and issued a diagnostic) if the user got it wrong. */
11916 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11917 integer_type_node));
11919 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11924 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11928 use_eh_spec_block (tree fn)
11930 return (flag_exceptions && flag_enforce_eh_specs
11931 && !processing_template_decl
11932 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11933 /* We insert the EH_SPEC_BLOCK only in the original
11934 function; then, it is copied automatically to the
11936 && !DECL_CLONED_FUNCTION_P (fn)
11937 /* Implicitly-generated constructors and destructors have
11938 exception specifications. However, those specifications
11939 are the union of the possible exceptions specified by the
11940 constructors/destructors for bases and members, so no
11941 unallowed exception will ever reach this function. By
11942 not creating the EH_SPEC_BLOCK we save a little memory,
11943 and we avoid spurious warnings about unreachable
11945 && !DECL_ARTIFICIAL (fn));
11948 /* Store the parameter declarations into the current function declaration.
11949 This is called after parsing the parameter declarations, before
11950 digesting the body of the function.
11952 Also install to binding contour return value identifier, if any. */
11955 store_parm_decls (tree current_function_parms)
11957 tree fndecl = current_function_decl;
11960 /* This is a chain of any other decls that came in among the parm
11961 declarations. If a parm is declared with enum {foo, bar} x;
11962 then CONST_DECLs for foo and bar are put here. */
11963 tree nonparms = NULL_TREE;
11965 if (current_function_parms)
11967 /* This case is when the function was defined with an ANSI prototype.
11968 The parms already have decls, so we need not do anything here
11969 except record them as in effect
11970 and complain if any redundant old-style parm decls were written. */
11972 tree specparms = current_function_parms;
11975 /* Must clear this because it might contain TYPE_DECLs declared
11977 current_binding_level->names = NULL;
11979 /* If we're doing semantic analysis, then we'll call pushdecl
11980 for each of these. We must do them in reverse order so that
11981 they end in the correct forward order. */
11982 specparms = nreverse (specparms);
11984 for (parm = specparms; parm; parm = next)
11986 next = TREE_CHAIN (parm);
11987 if (TREE_CODE (parm) == PARM_DECL)
11989 if (DECL_NAME (parm) == NULL_TREE
11990 || TREE_CODE (parm) != VOID_TYPE)
11993 error ("parameter %qD declared void", parm);
11997 /* If we find an enum constant or a type tag,
11998 put it aside for the moment. */
11999 TREE_CHAIN (parm) = NULL_TREE;
12000 nonparms = chainon (nonparms, parm);
12004 /* Get the decls in their original chain order and record in the
12005 function. This is all and only the PARM_DECLs that were
12006 pushed into scope by the loop above. */
12007 DECL_ARGUMENTS (fndecl) = getdecls ();
12010 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12012 /* Now store the final chain of decls for the arguments
12013 as the decl-chain of the current lexical scope.
12014 Put the enumerators in as well, at the front so that
12015 DECL_ARGUMENTS is not modified. */
12016 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12018 if (use_eh_spec_block (current_function_decl))
12019 current_eh_spec_block = begin_eh_spec_block ();
12023 /* We have finished doing semantic analysis on DECL, but have not yet
12024 generated RTL for its body. Save away our current state, so that
12025 when we want to generate RTL later we know what to do. */
12028 save_function_data (tree decl)
12030 struct language_function *f;
12032 /* Save the language-specific per-function data so that we can
12033 get it back when we really expand this function. */
12034 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12037 f = GGC_NEW (struct language_function);
12038 memcpy (f, cp_function_chain, sizeof (struct language_function));
12039 DECL_SAVED_FUNCTION_DATA (decl) = f;
12041 /* Clear out the bits we don't need. */
12042 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12043 f->bindings = NULL;
12044 f->x_local_names = NULL;
12048 /* Set the return value of the constructor (if present). */
12051 finish_constructor_body (void)
12056 if (targetm.cxx.cdtor_returns_this ()
12057 && (! TYPE_FOR_JAVA (current_class_type)))
12059 /* Any return from a constructor will end up here. */
12060 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
12062 val = DECL_ARGUMENTS (current_function_decl);
12063 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12064 DECL_RESULT (current_function_decl), val);
12065 /* Return the address of the object. */
12066 exprstmt = build_stmt (RETURN_EXPR, val);
12067 add_stmt (exprstmt);
12071 /* Do all the processing for the beginning of a destructor; set up the
12072 vtable pointers and cleanups for bases and members. */
12075 begin_destructor_body (void)
12077 tree compound_stmt;
12079 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12080 issued an error message. We still want to try to process the
12081 body of the function, but initialize_vtbl_ptrs will crash if
12082 TYPE_BINFO is NULL. */
12083 if (COMPLETE_TYPE_P (current_class_type))
12085 compound_stmt = begin_compound_stmt (0);
12086 /* Make all virtual function table pointers in non-virtual base
12087 classes point to CURRENT_CLASS_TYPE's virtual function
12089 initialize_vtbl_ptrs (current_class_ptr);
12090 finish_compound_stmt (compound_stmt);
12092 /* And insert cleanups for our bases and members so that they
12093 will be properly destroyed if we throw. */
12094 push_base_cleanups ();
12098 /* At the end of every destructor we generate code to delete the object if
12099 necessary. Do that now. */
12102 finish_destructor_body (void)
12106 /* Any return from a destructor will end up here; that way all base
12107 and member cleanups will be run when the function returns. */
12108 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
12110 /* In a virtual destructor, we must call delete. */
12111 if (DECL_VIRTUAL_P (current_function_decl))
12114 tree virtual_size = cxx_sizeof (current_class_type);
12118 At the point of definition of a virtual destructor (including
12119 an implicit definition), non-placement operator delete shall
12120 be looked up in the scope of the destructor's class and if
12121 found shall be accessible and unambiguous. */
12122 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12124 /*global_p=*/false,
12125 /*placement=*/NULL_TREE,
12126 /*alloc_fn=*/NULL_TREE);
12128 if_stmt = begin_if_stmt ();
12129 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12130 current_in_charge_parm,
12133 finish_expr_stmt (exprstmt);
12134 finish_then_clause (if_stmt);
12135 finish_if_stmt (if_stmt);
12138 if (targetm.cxx.cdtor_returns_this ())
12142 val = DECL_ARGUMENTS (current_function_decl);
12143 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12144 DECL_RESULT (current_function_decl), val);
12145 /* Return the address of the object. */
12146 exprstmt = build_stmt (RETURN_EXPR, val);
12147 add_stmt (exprstmt);
12151 /* Do the necessary processing for the beginning of a function body, which
12152 in this case includes member-initializers, but not the catch clauses of
12153 a function-try-block. Currently, this means opening a binding level
12154 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12157 begin_function_body (void)
12161 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12164 if (processing_template_decl)
12165 /* Do nothing now. */;
12167 /* Always keep the BLOCK node associated with the outermost pair of
12168 curly braces of a function. These are needed for correct
12169 operation of dwarfout.c. */
12170 keep_next_level (true);
12172 stmt = begin_compound_stmt (BCS_FN_BODY);
12174 if (processing_template_decl)
12175 /* Do nothing now. */;
12176 else if (DECL_DESTRUCTOR_P (current_function_decl))
12177 begin_destructor_body ();
12182 /* Do the processing for the end of a function body. Currently, this means
12183 closing out the cleanups for fully-constructed bases and members, and in
12184 the case of the destructor, deleting the object if desired. Again, this
12185 is only meaningful for [cd]tors, since they are the only functions where
12186 there is a significant distinction between the main body and any
12187 function catch clauses. Handling, say, main() return semantics here
12188 would be wrong, as flowing off the end of a function catch clause for
12189 main() would also need to return 0. */
12192 finish_function_body (tree compstmt)
12194 if (compstmt == NULL_TREE)
12197 /* Close the block. */
12198 finish_compound_stmt (compstmt);
12200 if (processing_template_decl)
12201 /* Do nothing now. */;
12202 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12203 finish_constructor_body ();
12204 else if (DECL_DESTRUCTOR_P (current_function_decl))
12205 finish_destructor_body ();
12208 /* Given a function, returns the BLOCK corresponding to the outermost level
12209 of curly braces, skipping the artificial block created for constructor
12213 outer_curly_brace_block (tree fndecl)
12215 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12216 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12217 /* Skip the artificial function body block. */
12218 block = BLOCK_SUBBLOCKS (block);
12222 /* Finish up a function declaration and compile that function
12223 all the way to assembler language output. The free the storage
12224 for the function definition.
12226 FLAGS is a bitwise or of the following values:
12228 We just finished processing the body of an in-class inline
12229 function definition. (This processing will have taken place
12230 after the class definition is complete.) */
12233 finish_function (int flags)
12235 tree fndecl = current_function_decl;
12236 tree fntype, ctype = NULL_TREE;
12237 int inclass_inline = (flags & 2) != 0;
12240 /* When we get some parse errors, we can end up without a
12241 current_function_decl, so cope. */
12242 if (fndecl == NULL_TREE)
12243 return error_mark_node;
12245 gcc_assert (!defer_mark_used_calls);
12246 defer_mark_used_calls = true;
12248 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12249 && DECL_VIRTUAL_P (fndecl)
12250 && !processing_template_decl)
12252 tree fnclass = DECL_CONTEXT (fndecl);
12253 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12254 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12257 nested = function_depth > 1;
12258 fntype = TREE_TYPE (fndecl);
12260 /* TREE_READONLY (fndecl) = 1;
12261 This caused &foo to be of type ptr-to-const-function
12262 which then got a warning when stored in a ptr-to-function variable. */
12264 gcc_assert (building_stmt_tree ());
12265 /* The current function is being defined, so its DECL_INITIAL should
12266 be set, and unless there's a multiple definition, it should be
12267 error_mark_node. */
12268 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12270 /* For a cloned function, we've already got all the code we need;
12271 there's no need to add any extra bits. */
12272 if (!DECL_CLONED_FUNCTION_P (fndecl))
12274 if (DECL_MAIN_P (current_function_decl))
12278 /* Make it so that `main' always returns 0 by default (or
12281 stmt = finish_return_stmt (integer_one_node);
12283 stmt = finish_return_stmt (integer_zero_node);
12285 /* Hack. We don't want the middle-end to warn that this
12286 return is unreachable, so put the statement on the
12289 location_t linezero = linemap_line_start (line_table, 0, 1);
12290 SET_EXPR_LOCATION (stmt, linezero);
12294 if (use_eh_spec_block (current_function_decl))
12295 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12296 (TREE_TYPE (current_function_decl)),
12297 current_eh_spec_block);
12300 /* If we're saving up tree structure, tie off the function now. */
12301 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12303 finish_fname_decls ();
12305 /* If this function can't throw any exceptions, remember that. */
12306 if (!processing_template_decl
12307 && !cp_function_chain->can_throw
12308 && !flag_non_call_exceptions
12309 && !DECL_REPLACEABLE_P (fndecl))
12310 TREE_NOTHROW (fndecl) = 1;
12312 /* This must come after expand_function_end because cleanups might
12313 have declarations (from inline functions) that need to go into
12314 this function's blocks. */
12316 /* If the current binding level isn't the outermost binding level
12317 for this function, either there is a bug, or we have experienced
12318 syntax errors and the statement tree is malformed. */
12319 if (current_binding_level->kind != sk_function_parms)
12321 /* Make sure we have already experienced errors. */
12322 gcc_assert (errorcount);
12324 /* Throw away the broken statement tree and extra binding
12326 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12328 while (current_binding_level->kind != sk_function_parms)
12330 if (current_binding_level->kind == sk_class)
12331 pop_nested_class ();
12333 poplevel (0, 0, 0);
12336 poplevel (1, 0, 1);
12338 /* Statements should always be full-expressions at the outermost set
12339 of curly braces for a function. */
12340 gcc_assert (stmts_are_full_exprs_p ());
12342 /* Set up the named return value optimization, if we can. Candidate
12343 variables are selected in check_return_expr. */
12344 if (current_function_return_value)
12346 tree r = current_function_return_value;
12349 if (r != error_mark_node
12350 /* This is only worth doing for fns that return in memory--and
12351 simpler, since we don't have to worry about promoted modes. */
12352 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12353 /* Only allow this for variables declared in the outer scope of
12354 the function so we know that their lifetime always ends with a
12355 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12356 we were to do this optimization in tree-ssa. */
12357 && (outer = outer_curly_brace_block (fndecl))
12358 && chain_member (r, BLOCK_VARS (outer)))
12359 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12361 current_function_return_value = NULL_TREE;
12364 /* Remember that we were in class scope. */
12365 if (current_class_name)
12366 ctype = current_class_type;
12368 /* Must mark the RESULT_DECL as being in this function. */
12369 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12371 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12372 to the FUNCTION_DECL node itself. */
12373 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12375 /* Save away current state, if appropriate. */
12376 if (!processing_template_decl)
12377 save_function_data (fndecl);
12379 /* Complain if there's just no return statement. */
12380 if (warn_return_type
12381 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12382 && !dependent_type_p (TREE_TYPE (fntype))
12383 && !current_function_returns_value && !current_function_returns_null
12384 /* Don't complain if we abort or throw. */
12385 && !current_function_returns_abnormally
12386 /* Don't complain if we are declared noreturn. */
12387 && !TREE_THIS_VOLATILE (fndecl)
12388 && !DECL_NAME (DECL_RESULT (fndecl))
12389 && !TREE_NO_WARNING (fndecl)
12390 /* Structor return values (if any) are set by the compiler. */
12391 && !DECL_CONSTRUCTOR_P (fndecl)
12392 && !DECL_DESTRUCTOR_P (fndecl))
12394 warning (OPT_Wreturn_type,
12395 "no return statement in function returning non-void");
12396 TREE_NO_WARNING (fndecl) = 1;
12399 /* Store the end of the function, so that we get good line number
12400 info for the epilogue. */
12401 cfun->function_end_locus = input_location;
12403 /* Genericize before inlining. */
12404 if (!processing_template_decl)
12406 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12407 cp_genericize (fndecl);
12408 /* Clear out the bits we don't need. */
12409 f->x_current_class_ptr = NULL;
12410 f->x_current_class_ref = NULL;
12411 f->x_eh_spec_block = NULL;
12412 f->x_in_charge_parm = NULL;
12413 f->x_vtt_parm = NULL;
12414 f->x_return_value = NULL;
12415 f->bindings = NULL;
12416 f->extern_decl_map = NULL;
12418 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
12419 c_warn_unused_result (gimple_body (fndecl));
12421 /* Clear out the bits we don't need. */
12422 local_names = NULL;
12424 /* We're leaving the context of this function, so zap cfun. It's still in
12425 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12427 current_function_decl = NULL;
12429 /* If this is an in-class inline definition, we may have to pop the
12430 bindings for the template parameters that we added in
12431 maybe_begin_member_template_processing when start_function was
12433 if (inclass_inline)
12434 maybe_end_member_template_processing ();
12436 /* Leave the scope of the class. */
12438 pop_nested_class ();
12444 /* Let the error reporting routines know that we're outside a
12445 function. For a nested function, this value is used in
12446 cxx_pop_function_context and then reset via pop_function_context. */
12447 current_function_decl = NULL_TREE;
12449 defer_mark_used_calls = false;
12450 if (deferred_mark_used_calls)
12455 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12457 VEC_free (tree, gc, deferred_mark_used_calls);
12463 /* Create the FUNCTION_DECL for a function definition.
12464 DECLSPECS and DECLARATOR are the parts of the declaration;
12465 they describe the return type and the name of the function,
12466 but twisted together in a fashion that parallels the syntax of C.
12468 This function creates a binding context for the function body
12469 as well as setting up the FUNCTION_DECL in current_function_decl.
12471 Returns a FUNCTION_DECL on success.
12473 If the DECLARATOR is not suitable for a function (it defines a datum
12474 instead), we return 0, which tells yyparse to report a parse error.
12476 May return void_type_node indicating that this method is actually
12477 a friend. See grokfield for more details.
12479 Came here with a `.pushlevel' .
12481 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12482 CHANGES TO CODE IN `grokfield'. */
12485 start_method (cp_decl_specifier_seq *declspecs,
12486 const cp_declarator *declarator, tree attrlist)
12488 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12491 if (fndecl == error_mark_node)
12492 return error_mark_node;
12494 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12496 error ("invalid member function declaration");
12497 return error_mark_node;
12501 cplus_decl_attributes (&fndecl, attrlist, 0);
12503 /* Pass friends other than inline friend functions back. */
12504 if (fndecl == void_type_node)
12507 if (DECL_IN_AGGR_P (fndecl))
12509 if (DECL_CONTEXT (fndecl)
12510 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12511 error ("%qD is already defined in class %qT", fndecl,
12512 DECL_CONTEXT (fndecl));
12513 return error_mark_node;
12516 check_template_shadow (fndecl);
12518 DECL_DECLARED_INLINE_P (fndecl) = 1;
12519 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12521 /* We process method specializations in finish_struct_1. */
12522 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12524 fndecl = push_template_decl (fndecl);
12525 if (fndecl == error_mark_node)
12529 if (! DECL_FRIEND_P (fndecl))
12531 if (TREE_CHAIN (fndecl))
12533 fndecl = copy_node (fndecl);
12534 TREE_CHAIN (fndecl) = NULL_TREE;
12538 finish_decl (fndecl, NULL_TREE, NULL_TREE);
12540 /* Make a place for the parms. */
12541 begin_scope (sk_function_parms, fndecl);
12543 DECL_IN_AGGR_P (fndecl) = 1;
12547 /* Go through the motions of finishing a function definition.
12548 We don't compile this method until after the whole class has
12551 FINISH_METHOD must return something that looks as though it
12552 came from GROKFIELD (since we are defining a method, after all).
12554 This is called after parsing the body of the function definition.
12555 STMTS is the chain of statements that makes up the function body.
12557 DECL is the ..._DECL that `start_method' provided. */
12560 finish_method (tree decl)
12562 tree fndecl = decl;
12567 if (decl == void_type_node)
12570 old_initial = DECL_INITIAL (fndecl);
12572 /* Undo the level for the parms (from start_method).
12573 This is like poplevel, but it causes nothing to be
12574 saved. Saving information here confuses symbol-table
12575 output routines. Besides, this information will
12576 be correctly output when this method is actually
12579 /* Clear out the meanings of the local variables of this level;
12580 also record in each decl which block it belongs to. */
12582 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
12584 if (DECL_NAME (link) != NULL_TREE)
12585 pop_binding (DECL_NAME (link), link);
12586 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
12587 DECL_CONTEXT (link) = NULL_TREE;
12590 poplevel (0, 0, 0);
12592 DECL_INITIAL (fndecl) = old_initial;
12594 /* We used to check if the context of FNDECL was different from
12595 current_class_type as another way to get inside here. This didn't work
12596 for String.cc in libg++. */
12597 if (DECL_FRIEND_P (fndecl))
12599 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
12601 decl = void_type_node;
12608 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12609 we can lay it out later, when and if its type becomes complete. */
12612 maybe_register_incomplete_var (tree var)
12614 gcc_assert (TREE_CODE (var) == VAR_DECL);
12616 /* Keep track of variables with incomplete types. */
12617 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12618 && DECL_EXTERNAL (var))
12620 tree inner_type = TREE_TYPE (var);
12622 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12623 inner_type = TREE_TYPE (inner_type);
12624 inner_type = TYPE_MAIN_VARIANT (inner_type);
12626 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12627 /* RTTI TD entries are created while defining the type_info. */
12628 || (TYPE_LANG_SPECIFIC (inner_type)
12629 && TYPE_BEING_DEFINED (inner_type)))
12630 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12634 /* Called when a class type (given by TYPE) is defined. If there are
12635 any existing VAR_DECLs whose type has been completed by this
12636 declaration, update them now. */
12639 complete_vars (tree type)
12641 tree *list = &incomplete_vars;
12643 gcc_assert (CLASS_TYPE_P (type));
12646 if (same_type_p (type, TREE_PURPOSE (*list)))
12648 tree var = TREE_VALUE (*list);
12649 tree type = TREE_TYPE (var);
12650 /* Complete the type of the variable. The VAR_DECL itself
12651 will be laid out in expand_expr. */
12652 complete_type (type);
12653 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12654 /* Remove this entry from the list. */
12655 *list = TREE_CHAIN (*list);
12658 list = &TREE_CHAIN (*list);
12661 /* Check for pending declarations which may have abstract type. */
12662 complete_type_check_abstract (type);
12665 /* If DECL is of a type which needs a cleanup, build and return an
12666 expression to perform that cleanup here. Return NULL_TREE if no
12667 cleanup need be done. */
12670 cxx_maybe_build_cleanup (tree decl)
12676 /* Assume no cleanup is required. */
12677 cleanup = NULL_TREE;
12679 if (error_operand_p (decl))
12682 /* Handle "__attribute__((cleanup))". We run the cleanup function
12683 before the destructor since the destructor is what actually
12684 terminates the lifetime of the object. */
12685 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12692 /* Get the name specified by the user for the cleanup function. */
12693 id = TREE_VALUE (TREE_VALUE (attr));
12694 /* Look up the name to find the cleanup function to call. It is
12695 important to use lookup_name here because that is what is
12696 used in c-common.c:handle_cleanup_attribute when performing
12697 initial checks on the attribute. Note that those checks
12698 include ensuring that the function found is not an overloaded
12699 function, or an object with an overloaded call operator,
12700 etc.; we can rely on the fact that the function found is an
12701 ordinary FUNCTION_DECL. */
12702 fn = lookup_name (id);
12703 arg = build_address (decl);
12705 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12707 tf_warning_or_error);
12709 /* Handle ordinary C++ destructors. */
12710 type = TREE_TYPE (decl);
12711 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12713 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12714 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12715 && CLASSTYPE_VBASECLASSES (type));
12719 if (TREE_CODE (type) == ARRAY_TYPE)
12722 addr = build_address (decl);
12724 /* Optimize for space over speed here. */
12725 if (!has_vbases || flag_expensive_optimizations)
12726 flags |= LOOKUP_NONVIRTUAL;
12728 call = build_delete (TREE_TYPE (addr), addr,
12729 sfk_complete_destructor, flags, 0);
12731 cleanup = build_compound_expr (cleanup, call);
12739 /* When a stmt has been parsed, this function is called. */
12746 /* DECL was originally constructed as a non-static member function,
12747 but turned out to be static. Update it accordingly. */
12750 revert_static_member_fn (tree decl)
12753 tree function = TREE_TYPE (decl);
12754 tree args = TYPE_ARG_TYPES (function);
12756 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12757 != TYPE_UNQUALIFIED)
12758 error ("static member function %q#D declared with type qualifiers", decl);
12760 args = TREE_CHAIN (args);
12761 tmp = build_function_type (TREE_TYPE (function), args);
12762 tmp = build_qualified_type (tmp, cp_type_quals (function));
12763 tmp = build_exception_variant (tmp,
12764 TYPE_RAISES_EXCEPTIONS (function));
12765 TREE_TYPE (decl) = tmp;
12766 if (DECL_ARGUMENTS (decl))
12767 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12768 DECL_STATIC_FUNCTION_P (decl) = 1;
12771 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12772 one of the language-independent trees. */
12774 enum cp_tree_node_structure_enum
12775 cp_tree_node_structure (union lang_tree_node * t)
12777 switch (TREE_CODE (&t->generic))
12779 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12780 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12781 case OVERLOAD: return TS_CP_OVERLOAD;
12782 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12783 case PTRMEM_CST: return TS_CP_PTRMEM;
12784 case BASELINK: return TS_CP_BASELINK;
12785 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12786 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12787 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12788 default: return TS_CP_GENERIC;
12792 /* Build the void_list_node (void_type_node having been created). */
12794 build_void_list_node (void)
12796 tree t = build_tree_list (NULL_TREE, void_type_node);
12801 cp_missing_noreturn_ok_p (tree decl)
12803 /* A missing noreturn is ok for the `main' function. */
12804 return DECL_MAIN_P (decl);
12807 /* Return the COMDAT group into which DECL should be placed. */
12810 cxx_comdat_group (tree decl)
12814 /* Virtual tables, construction virtual tables, and virtual table
12815 tables all go in a single COMDAT group, named after the primary
12817 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12818 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12819 /* For all other DECLs, the COMDAT group is the mangled name of the
12820 declaration itself. */
12823 while (DECL_THUNK_P (decl))
12825 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12826 into the same section as the target function. In that case
12827 we must return target's name. */
12828 tree target = THUNK_TARGET (decl);
12829 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12830 && DECL_SECTION_NAME (target) != NULL
12831 && DECL_ONE_ONLY (target))
12836 name = DECL_ASSEMBLER_NAME (decl);
12839 return IDENTIFIER_POINTER (name);
12842 #include "gt-cp-decl.h"