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 while (b->level_chain->kind != sk_function_parms)
3541 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3542 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3543 LOOKUP_ONLYCONVERTING);
3546 pushdecl_top_level_and_finish (decl, init);
3552 builtin_function_1 (tree decl, tree context, bool is_global)
3554 tree id = DECL_NAME (decl);
3555 const char *name = IDENTIFIER_POINTER (id);
3557 retrofit_lang_decl (decl);
3559 /* All nesting of C++ functions is lexical; there is never a "static
3560 chain" in the sense of GNU C nested functions. */
3561 DECL_NO_STATIC_CHAIN (decl) = 1;
3563 DECL_ARTIFICIAL (decl) = 1;
3564 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3565 SET_DECL_LANGUAGE (decl, lang_c);
3566 /* Runtime library routines are, by definition, available in an
3567 external shared object. */
3568 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3569 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3571 DECL_CONTEXT (decl) = context;
3574 pushdecl_top_level (decl);
3578 /* A function in the user's namespace should have an explicit
3579 declaration before it is used. Mark the built-in function as
3580 anticipated but not actually declared. */
3581 if (name[0] != '_' || name[1] != '_')
3582 DECL_ANTICIPATED (decl) = 1;
3583 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3585 size_t len = strlen (name);
3587 /* Treat __*_chk fortification functions as anticipated as well,
3588 unless they are __builtin_*. */
3589 if (len > strlen ("___chk")
3590 && memcmp (name + len - strlen ("_chk"),
3591 "_chk", strlen ("_chk") + 1) == 0)
3592 DECL_ANTICIPATED (decl) = 1;
3599 cxx_builtin_function (tree decl)
3601 tree id = DECL_NAME (decl);
3602 const char *name = IDENTIFIER_POINTER (id);
3603 /* All builtins that don't begin with an '_' should additionally
3604 go in the 'std' namespace. */
3607 tree decl2 = copy_node(decl);
3608 push_namespace (std_identifier);
3609 builtin_function_1 (decl2, std_node, false);
3613 return builtin_function_1 (decl, NULL_TREE, false);
3616 /* Like cxx_builtin_function, but guarantee the function is added to the global
3617 scope. This is to allow function specific options to add new machine
3618 dependent builtins when the target ISA changes via attribute((target(...)))
3619 which saves space on program startup if the program does not use non-generic
3623 cxx_builtin_function_ext_scope (tree decl)
3626 tree id = DECL_NAME (decl);
3627 const char *name = IDENTIFIER_POINTER (id);
3628 /* All builtins that don't begin with an '_' should additionally
3629 go in the 'std' namespace. */
3632 tree decl2 = copy_node(decl);
3633 push_namespace (std_identifier);
3634 builtin_function_1 (decl2, std_node, true);
3638 return builtin_function_1 (decl, NULL_TREE, true);
3641 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3642 function. Not called directly. */
3645 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3647 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3648 DECL_EXTERNAL (fn) = 1;
3649 TREE_PUBLIC (fn) = 1;
3650 DECL_ARTIFICIAL (fn) = 1;
3651 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3652 SET_DECL_LANGUAGE (fn, lang_c);
3653 /* Runtime library routines are, by definition, available in an
3654 external shared object. */
3655 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3656 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3660 /* Returns the _DECL for a library function with C linkage.
3661 We assume that such functions never throw; if this is incorrect,
3662 callers should unset TREE_NOTHROW. */
3665 build_library_fn (tree name, tree type)
3667 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3668 TREE_NOTHROW (fn) = 1;
3672 /* Returns the _DECL for a library function with C++ linkage. */
3675 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3677 tree fn = build_library_fn_1 (name, operator_code, type);
3678 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3679 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3680 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3684 /* Like build_library_fn, but takes a C string instead of an
3688 build_library_fn_ptr (const char* name, tree type)
3690 return build_library_fn (get_identifier (name), type);
3693 /* Like build_cp_library_fn, but takes a C string instead of an
3697 build_cp_library_fn_ptr (const char* name, tree type)
3699 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3702 /* Like build_library_fn, but also pushes the function so that we will
3703 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3704 may throw exceptions listed in RAISES. */
3707 push_library_fn (tree name, tree type, tree raises)
3712 type = build_exception_variant (type, raises);
3714 fn = build_library_fn (name, type);
3715 pushdecl_top_level (fn);
3719 /* Like build_cp_library_fn, but also pushes the function so that it
3720 will be found by normal lookup. */
3723 push_cp_library_fn (enum tree_code operator_code, tree type)
3725 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3732 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3736 push_void_library_fn (tree name, tree parmtypes)
3738 tree type = build_function_type (void_type_node, parmtypes);
3739 return push_library_fn (name, type, NULL_TREE);
3742 /* Like push_library_fn, but also note that this function throws
3743 and does not return. Used for __throw_foo and the like. */
3746 push_throw_library_fn (tree name, tree type)
3748 tree fn = push_library_fn (name, type, NULL_TREE);
3749 TREE_THIS_VOLATILE (fn) = 1;
3750 TREE_NOTHROW (fn) = 0;
3754 /* When we call finish_struct for an anonymous union, we create
3755 default copy constructors and such. But, an anonymous union
3756 shouldn't have such things; this function undoes the damage to the
3757 anonymous union type T.
3759 (The reason that we create the synthesized methods is that we don't
3760 distinguish `union { int i; }' from `typedef union { int i; } U'.
3761 The first is an anonymous union; the second is just an ordinary
3765 fixup_anonymous_aggr (tree t)
3769 /* Wipe out memory of synthesized methods. */
3770 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3771 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3772 TYPE_HAS_INIT_REF (t) = 0;
3773 TYPE_HAS_CONST_INIT_REF (t) = 0;
3774 TYPE_HAS_ASSIGN_REF (t) = 0;
3775 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3777 /* Splice the implicitly generated functions out of the TYPE_METHODS
3779 q = &TYPE_METHODS (t);
3782 if (DECL_ARTIFICIAL (*q))
3783 *q = TREE_CHAIN (*q);
3785 q = &TREE_CHAIN (*q);
3788 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3789 if (TYPE_METHODS (t))
3791 tree decl = TYPE_MAIN_DECL (t);
3793 if (TREE_CODE (t) != UNION_TYPE)
3794 error ("%Jan anonymous struct cannot have function members", decl);
3796 error ("%Jan anonymous union cannot have function members", decl);
3799 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3800 assignment operators (because they cannot have these methods themselves).
3801 For anonymous unions this is already checked because they are not allowed
3802 in any union, otherwise we have to check it. */
3803 if (TREE_CODE (t) != UNION_TYPE)
3807 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3808 if (TREE_CODE (field) == FIELD_DECL)
3810 type = TREE_TYPE (field);
3811 if (CLASS_TYPE_P (type))
3813 if (TYPE_NEEDS_CONSTRUCTING (type))
3814 error ("member %q+#D with constructor not allowed "
3815 "in anonymous aggregate", field);
3816 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3817 error ("member %q+#D with destructor not allowed "
3818 "in anonymous aggregate", field);
3819 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3820 error ("member %q+#D with copy assignment operator "
3821 "not allowed in anonymous aggregate", field);
3827 /* Make sure that a declaration with no declarator is well-formed, i.e.
3828 just declares a tagged type or anonymous union.
3830 Returns the type declared; or NULL_TREE if none. */
3833 check_tag_decl (cp_decl_specifier_seq *declspecs)
3835 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3836 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3837 /* If a class, struct, or enum type is declared by the DECLSPECS
3838 (i.e, if a class-specifier, enum-specifier, or non-typename
3839 elaborated-type-specifier appears in the DECLSPECS),
3840 DECLARED_TYPE is set to the corresponding type. */
3841 tree declared_type = NULL_TREE;
3842 bool error_p = false;
3844 if (declspecs->multiple_types_p)
3845 error ("multiple types in one declaration");
3846 else if (declspecs->redefined_builtin_type)
3848 if (!in_system_header)
3849 permerror (input_location, "redeclaration of C++ built-in type %qT",
3850 declspecs->redefined_builtin_type);
3855 && TYPE_P (declspecs->type)
3856 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3857 && MAYBE_CLASS_TYPE_P (declspecs->type))
3858 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3859 declared_type = declspecs->type;
3860 else if (declspecs->type == error_mark_node)
3862 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3863 permerror (input_location, "declaration does not declare anything");
3864 /* Check for an anonymous union. */
3865 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
3866 && TYPE_ANONYMOUS_P (declared_type))
3868 /* 7/3 In a simple-declaration, the optional init-declarator-list
3869 can be omitted only when declaring a class (clause 9) or
3870 enumeration (7.2), that is, when the decl-specifier-seq contains
3871 either a class-specifier, an elaborated-type-specifier with
3872 a class-key (9.1), or an enum-specifier. In these cases and
3873 whenever a class-specifier or enum-specifier is present in the
3874 decl-specifier-seq, the identifiers in these specifiers are among
3875 the names being declared by the declaration (as class-name,
3876 enum-names, or enumerators, depending on the syntax). In such
3877 cases, and except for the declaration of an unnamed bit-field (9.6),
3878 the decl-specifier-seq shall introduce one or more names into the
3879 program, or shall redeclare a name introduced by a previous
3880 declaration. [Example:
3881 enum { }; // ill-formed
3882 typedef class { }; // ill-formed
3886 error ("missing type-name in typedef-declaration");
3889 /* Anonymous unions are objects, so they can have specifiers. */;
3890 SET_ANON_AGGR_TYPE_P (declared_type);
3892 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
3893 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
3898 if (declspecs->specs[(int)ds_inline]
3899 || declspecs->specs[(int)ds_virtual])
3900 error ("%qs can only be specified for functions",
3901 declspecs->specs[(int)ds_inline]
3902 ? "inline" : "virtual");
3904 && (!current_class_type
3905 || current_scope () != current_class_type))
3906 error ("%<friend%> can only be specified inside a class");
3907 else if (declspecs->specs[(int)ds_explicit])
3908 error ("%<explicit%> can only be specified for constructors");
3909 else if (declspecs->storage_class)
3910 error ("a storage class can only be specified for objects "
3912 else if (declspecs->specs[(int)ds_const]
3913 || declspecs->specs[(int)ds_volatile]
3914 || declspecs->specs[(int)ds_restrict]
3915 || declspecs->specs[(int)ds_thread])
3916 error ("qualifiers can only be specified for objects "
3918 else if (saw_typedef)
3919 warning (0, "%<typedef%> was ignored in this declaration");
3922 return declared_type;
3925 /* Called when a declaration is seen that contains no names to declare.
3926 If its type is a reference to a structure, union or enum inherited
3927 from a containing scope, shadow that tag name for the current scope
3928 with a forward reference.
3929 If its type defines a new named structure or union
3930 or defines an enum, it is valid but we need not do anything here.
3931 Otherwise, it is an error.
3933 C++: may have to grok the declspecs to learn about static,
3934 complain for anonymous unions.
3936 Returns the TYPE declared -- or NULL_TREE if none. */
3939 shadow_tag (cp_decl_specifier_seq *declspecs)
3941 tree t = check_tag_decl (declspecs);
3946 if (declspecs->attributes)
3948 warning (0, "attribute ignored in declaration of %q+#T", t);
3949 warning (0, "attribute for %q+#T must follow the %qs keyword",
3950 t, class_key_or_enum_as_string (t));
3954 if (maybe_process_partial_specialization (t) == error_mark_node)
3957 /* This is where the variables in an anonymous union are
3958 declared. An anonymous union declaration looks like:
3960 because there is no declarator after the union, the parser
3961 sends that declaration here. */
3962 if (ANON_AGGR_TYPE_P (t))
3964 fixup_anonymous_aggr (t);
3966 if (TYPE_FIELDS (t))
3968 tree decl = grokdeclarator (/*declarator=*/NULL,
3969 declspecs, NORMAL, 0, NULL);
3970 finish_anon_union (decl);
3977 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3980 groktypename (cp_decl_specifier_seq *type_specifiers,
3981 const cp_declarator *declarator,
3982 bool is_template_arg)
3986 enum decl_context context
3987 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
3988 attrs = type_specifiers->attributes;
3989 type_specifiers->attributes = NULL_TREE;
3990 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
3991 if (attrs && type != error_mark_node)
3993 if (CLASS_TYPE_P (type))
3994 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
3995 "outside of definition", type);
3996 else if (MAYBE_CLASS_TYPE_P (type))
3997 /* A template type parameter or other dependent type. */
3998 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
3999 "type %qT without an associated declaration", type);
4001 cplus_decl_attributes (&type, attrs, 0);
4006 /* Process a DECLARATOR for a function-scope variable declaration,
4007 namespace-scope variable declaration, or function declaration.
4008 (Function definitions go through start_function; class member
4009 declarations appearing in the body of the class go through
4010 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4011 If an error occurs, the error_mark_node is returned instead.
4013 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4014 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4015 for an explicitly defaulted function, or SD_DELETED for an explicitly
4016 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4017 implicitly initialized via a default constructor. ATTRIBUTES and
4018 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4019 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4020 set, the caller is responsible for calling pop_scope. */
4023 start_decl (const cp_declarator *declarator,
4024 cp_decl_specifier_seq *declspecs,
4027 tree prefix_attributes,
4028 tree *pushed_scope_p)
4036 *pushed_scope_p = NULL_TREE;
4038 /* An object declared as __attribute__((deprecated)) suppresses
4039 warnings of uses of other deprecated items. */
4040 if (lookup_attribute ("deprecated", attributes))
4041 deprecated_state = DEPRECATED_SUPPRESS;
4043 attributes = chainon (attributes, prefix_attributes);
4045 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4048 deprecated_state = DEPRECATED_NORMAL;
4050 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4051 || decl == error_mark_node)
4052 return error_mark_node;
4054 type = TREE_TYPE (decl);
4056 context = DECL_CONTEXT (decl);
4060 *pushed_scope_p = push_scope (context);
4062 /* We are only interested in class contexts, later. */
4063 if (TREE_CODE (context) == NAMESPACE_DECL)
4064 context = NULL_TREE;
4068 /* Is it valid for this decl to have an initializer at all?
4069 If not, set INITIALIZED to zero, which will indirectly
4070 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4071 switch (TREE_CODE (decl))
4074 error ("typedef %qD is initialized (use decltype instead)", decl);
4075 return error_mark_node;
4078 if (initialized == SD_DELETED)
4079 /* We'll handle the rest of the semantics later, but we need to
4080 set this now so it's visible to duplicate_decls. */
4081 DECL_DELETED_FN (decl) = 1;
4090 if (! toplevel_bindings_p ()
4091 && DECL_EXTERNAL (decl))
4092 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4094 DECL_EXTERNAL (decl) = 0;
4095 if (toplevel_bindings_p ())
4096 TREE_STATIC (decl) = 1;
4099 /* If this is a typedef that names the class for linkage purposes
4100 (7.1.3p8), apply any attributes directly to the type. */
4101 if (TREE_CODE (decl) == TYPE_DECL
4102 && TAGGED_TYPE_P (TREE_TYPE (decl))
4103 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4104 flags = ATTR_FLAG_TYPE_IN_PLACE;
4108 /* Set attributes here so if duplicate decl, will have proper attributes. */
4109 cplus_decl_attributes (&decl, attributes, flags);
4111 /* Dllimported symbols cannot be defined. Static data members (which
4112 can be initialized in-class and dllimported) go through grokfield,
4113 not here, so we don't need to exclude those decls when checking for
4115 if (initialized && DECL_DLLIMPORT_P (decl))
4117 error ("definition of %q#D is marked %<dllimport%>", decl);
4118 DECL_DLLIMPORT_P (decl) = 0;
4121 /* If #pragma weak was used, mark the decl weak now. */
4122 maybe_apply_pragma_weak (decl);
4124 if (TREE_CODE (decl) == FUNCTION_DECL
4125 && DECL_DECLARED_INLINE_P (decl)
4126 && DECL_UNINLINABLE (decl)
4127 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4128 warning (0, "inline function %q+D given attribute noinline", decl);
4130 if (context && COMPLETE_TYPE_P (complete_type (context)))
4132 if (TREE_CODE (decl) == VAR_DECL)
4134 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4135 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4136 error ("%q#D is not a static member of %q#T", decl, context);
4139 if (DECL_CONTEXT (field) != context)
4141 if (!same_type_p (DECL_CONTEXT (field), context))
4142 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4143 "to be defined as %<%T::%D%>",
4144 DECL_CONTEXT (field), DECL_NAME (decl),
4145 context, DECL_NAME (decl));
4146 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4148 if (processing_specialization
4149 && template_class_depth (context) == 0
4150 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4151 error ("template header not allowed in member definition "
4152 "of explicitly specialized class");
4153 /* Static data member are tricky; an in-class initialization
4154 still doesn't provide a definition, so the in-class
4155 declaration will have DECL_EXTERNAL set, but will have an
4156 initialization. Thus, duplicate_decls won't warn
4157 about this situation, and so we check here. */
4158 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4159 error ("duplicate initialization of %qD", decl);
4160 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4166 tree field = check_classfn (context, decl,
4167 (processing_template_decl
4168 > template_class_depth (context))
4169 ? current_template_parms
4171 if (field && field != error_mark_node
4172 && duplicate_decls (decl, field,
4173 /*newdecl_is_friend=*/false))
4177 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4178 DECL_IN_AGGR_P (decl) = 0;
4179 /* Do not mark DECL as an explicit specialization if it was not
4180 already marked as an instantiation; a declaration should
4181 never be marked as a specialization unless we know what
4182 template is being specialized. */
4183 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4185 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4187 /* [temp.expl.spec] An explicit specialization of a static data
4188 member of a template is a definition if the declaration
4189 includes an initializer; otherwise, it is a declaration.
4191 We check for processing_specialization so this only applies
4192 to the new specialization syntax. */
4193 if (!initialized && processing_specialization)
4194 DECL_EXTERNAL (decl) = 1;
4197 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
4198 permerror (input_location, "declaration of %q#D outside of class is not definition",
4202 was_public = TREE_PUBLIC (decl);
4204 /* Enter this declaration into the symbol table. */
4205 decl = maybe_push_decl (decl);
4207 if (processing_template_decl)
4208 decl = push_template_decl (decl);
4209 if (decl == error_mark_node)
4210 return error_mark_node;
4212 /* Tell the back end to use or not use .common as appropriate. If we say
4213 -fconserve-space, we want this to save .data space, at the expense of
4214 wrong semantics. If we say -fno-conserve-space, we want this to
4215 produce errors about redefs; to do this we force variables into the
4217 if (flag_conserve_space
4218 && TREE_CODE (decl) == VAR_DECL
4219 && TREE_PUBLIC (decl)
4220 && !DECL_THREAD_LOCAL_P (decl)
4221 && !have_global_bss_p ())
4222 DECL_COMMON (decl) = 1;
4224 if (TREE_CODE (decl) == VAR_DECL
4225 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4226 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4228 /* This is a const variable with implicit 'static'. Set
4229 DECL_THIS_STATIC so we can tell it from variables that are
4230 !TREE_PUBLIC because of the anonymous namespace. */
4231 gcc_assert (cp_type_readonly (TREE_TYPE (decl)));
4232 DECL_THIS_STATIC (decl) = 1;
4235 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4236 start_decl_1 (decl, initialized);
4241 /* Process the declaration of a variable DECL. INITIALIZED is true
4242 iff DECL is explicitly initialized. (INITIALIZED is false if the
4243 variable is initialized via an implicitly-called constructor.)
4244 This function must be called for ordinary variables (including, for
4245 example, implicit instantiations of templates), but must not be
4246 called for template declarations. */
4249 start_decl_1 (tree decl, bool initialized)
4253 bool aggregate_definition_p;
4255 gcc_assert (!processing_template_decl);
4257 if (error_operand_p (decl))
4260 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4262 type = TREE_TYPE (decl);
4263 complete_p = COMPLETE_TYPE_P (type);
4264 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4266 /* If an explicit initializer is present, or if this is a definition
4267 of an aggregate, then we need a complete type at this point.
4268 (Scalars are always complete types, so there is nothing to
4269 check.) This code just sets COMPLETE_P; errors (if necessary)
4270 are issued below. */
4271 if ((initialized || aggregate_definition_p)
4273 && COMPLETE_TYPE_P (complete_type (type)))
4276 /* We will not yet have set TREE_READONLY on DECL if the type
4277 was "const", but incomplete, before this point. But, now, we
4278 have a complete type, so we can try again. */
4279 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4283 /* Is it valid for this decl to have an initializer at all? */
4285 /* Don't allow initializations for incomplete types except for
4286 arrays which might be completed by the initialization. */
4288 ; /* A complete type is ok. */
4289 else if (type_uses_auto (type))
4290 ; /* An auto type is ok. */
4291 else if (TREE_CODE (type) != ARRAY_TYPE)
4293 error ("variable %q#D has initializer but incomplete type", decl);
4294 type = TREE_TYPE (decl) = error_mark_node;
4296 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4298 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4299 error ("elements of array %q#D have incomplete type", decl);
4300 /* else we already gave an error in start_decl. */
4303 else if (aggregate_definition_p && !complete_p)
4305 if (type_uses_auto (type))
4306 error ("declaration of %q#D has no initializer", decl);
4308 error ("aggregate %q#D has incomplete type and cannot be defined",
4310 /* Change the type so that assemble_variable will give
4311 DECL an rtl we can live with: (mem (const_int 0)). */
4312 type = TREE_TYPE (decl) = error_mark_node;
4315 /* Create a new scope to hold this declaration if necessary.
4316 Whether or not a new scope is necessary cannot be determined
4317 until after the type has been completed; if the type is a
4318 specialization of a class template it is not until after
4319 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4320 will be set correctly. */
4321 maybe_push_cleanup_level (type);
4324 /* Handle initialization of references. DECL, TYPE, and INIT have the
4325 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4326 but will be set to a new CLEANUP_STMT if a temporary is created
4327 that must be destroyed subsequently.
4329 Returns an initializer expression to use to initialize DECL, or
4330 NULL if the initialization can be performed statically.
4332 Quotes on semantics can be found in ARM 8.4.3. */
4335 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4339 if (init == NULL_TREE)
4341 if ((DECL_LANG_SPECIFIC (decl) == 0
4342 || DECL_IN_AGGR_P (decl) == 0)
4343 && ! DECL_THIS_EXTERN (decl))
4344 error ("%qD declared as reference but not initialized", decl);
4348 if (TREE_CODE (init) == TREE_LIST)
4349 init = build_x_compound_expr_from_list (init, "initializer");
4351 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4352 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4353 /* Note: default conversion is only called in very special cases. */
4354 init = decay_conversion (init);
4356 /* Convert INIT to the reference type TYPE. This may involve the
4357 creation of a temporary, whose lifetime must be the same as that
4358 of the reference. If so, a DECL_EXPR for the temporary will be
4359 added just after the DECL_EXPR for DECL. That's why we don't set
4360 DECL_INITIAL for local references (instead assigning to them
4361 explicitly); we need to allow the temporary to be initialized
4363 tmp = initialize_reference (type, init, decl, cleanup);
4365 if (tmp == error_mark_node)
4367 else if (tmp == NULL_TREE)
4369 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4373 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4376 DECL_INITIAL (decl) = tmp;
4381 /* Subroutine of check_initializer. We're initializing a DECL of
4382 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4383 extend the lifetime of the underlying array to match that of the decl,
4384 just like for reference initialization. CLEANUP is as for
4385 grok_reference_init. */
4388 build_init_list_var_init (tree decl, tree type, tree init, tree *cleanup)
4390 tree aggr_init, array, arrtype;
4391 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4392 aggr_init = TARGET_EXPR_INITIAL (init);
4393 init = build2 (INIT_EXPR, type, decl, init);
4395 array = AGGR_INIT_EXPR_ARG (aggr_init, 1);
4396 arrtype = TREE_TYPE (array);
4398 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4399 array = TREE_OPERAND (array, 0);
4400 /* If the array is constant, finish_compound_literal already made it a
4401 static variable and we don't need to do anything here. */
4402 if (decl && TREE_CODE (array) == TARGET_EXPR)
4405 tree var = set_up_extended_ref_temp (decl, array, cleanup, &subinit);
4406 var = build_address (var);
4407 var = convert (arrtype, var);
4408 AGGR_INIT_EXPR_ARG (aggr_init, 1) = var;
4409 init = build2 (COMPOUND_EXPR, TREE_TYPE (init), subinit, init);
4414 /* Designated initializers in arrays are not supported in GNU C++.
4415 The parser cannot detect this error since it does not know whether
4416 a given brace-enclosed initializer is for a class type or for an
4417 array. This function checks that CE does not use a designated
4418 initializer. If it does, an error is issued. Returns true if CE
4419 is valid, i.e., does not have a designated initializer. */
4422 check_array_designated_initializer (const constructor_elt *ce)
4424 /* Designated initializers for array elements are not supported. */
4427 /* The parser only allows identifiers as designated
4429 if (ce->index == error_mark_node)
4430 error ("name used in a GNU-style designated "
4431 "initializer for an array");
4434 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4435 error ("name %qD used in a GNU-style designated "
4436 "initializer for an array", ce->index);
4444 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4445 array until we finish parsing the initializer. If that's the
4446 situation we're in, update DECL accordingly. */
4449 maybe_deduce_size_from_array_init (tree decl, tree init)
4451 tree type = TREE_TYPE (decl);
4453 if (TREE_CODE (type) == ARRAY_TYPE
4454 && TYPE_DOMAIN (type) == NULL_TREE
4455 && TREE_CODE (decl) != TYPE_DECL)
4457 /* do_default is really a C-ism to deal with tentative definitions.
4458 But let's leave it here to ease the eventual merge. */
4459 int do_default = !DECL_EXTERNAL (decl);
4460 tree initializer = init ? init : DECL_INITIAL (decl);
4463 /* Check that there are no designated initializers in INIT, as
4464 those are not supported in GNU C++, and as the middle-end
4465 will crash if presented with a non-numeric designated
4467 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4469 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4470 constructor_elt *ce;
4473 VEC_iterate (constructor_elt, v, i, ce);
4475 if (!check_array_designated_initializer (ce))
4481 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4485 error ("initializer fails to determine size of %qD", decl);
4486 TREE_TYPE (decl) = error_mark_node;
4488 else if (failure == 2)
4492 error ("array size missing in %qD", decl);
4493 TREE_TYPE (decl) = error_mark_node;
4495 /* If a `static' var's size isn't known, make it extern as
4496 well as static, so it does not get allocated. If it's not
4497 `static', then don't mark it extern; finish_incomplete_decl
4498 will give it a default size and it will get allocated. */
4499 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4500 DECL_EXTERNAL (decl) = 1;
4502 else if (failure == 3)
4504 error ("zero-size array %qD", decl);
4505 TREE_TYPE (decl) = error_mark_node;
4509 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4511 layout_decl (decl, 0);
4515 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4516 any appropriate error messages regarding the layout. */
4519 layout_var_decl (tree decl)
4523 type = TREE_TYPE (decl);
4524 if (type == error_mark_node)
4527 /* If we haven't already layed out this declaration, do so now.
4528 Note that we must not call complete type for an external object
4529 because it's type might involve templates that we are not
4530 supposed to instantiate yet. (And it's perfectly valid to say
4531 `extern X x' for some incomplete type `X'.) */
4532 if (!DECL_EXTERNAL (decl))
4533 complete_type (type);
4534 if (!DECL_SIZE (decl)
4535 && TREE_TYPE (decl) != error_mark_node
4536 && (COMPLETE_TYPE_P (type)
4537 || (TREE_CODE (type) == ARRAY_TYPE
4538 && !TYPE_DOMAIN (type)
4539 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4540 layout_decl (decl, 0);
4542 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4544 /* An automatic variable with an incomplete type: that is an error.
4545 Don't talk about array types here, since we took care of that
4546 message in grokdeclarator. */
4547 error ("storage size of %qD isn't known", decl);
4548 TREE_TYPE (decl) = error_mark_node;
4551 /* Keep this code around in case we later want to control debug info
4552 based on whether a type is "used". (jason 1999-11-11) */
4554 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4555 /* Let debugger know it should output info for this type. */
4556 note_debug_info_needed (ttype);
4558 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4559 note_debug_info_needed (DECL_CONTEXT (decl));
4562 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4563 && DECL_SIZE (decl) != NULL_TREE
4564 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4566 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4567 constant_expression_warning (DECL_SIZE (decl));
4570 error ("storage size of %qD isn't constant", decl);
4571 TREE_TYPE (decl) = error_mark_node;
4576 /* If a local static variable is declared in an inline function, or if
4577 we have a weak definition, we must endeavor to create only one
4578 instance of the variable at link-time. */
4581 maybe_commonize_var (tree decl)
4583 /* Static data in a function with comdat linkage also has comdat
4585 if (TREE_STATIC (decl)
4586 /* Don't mess with __FUNCTION__. */
4587 && ! DECL_ARTIFICIAL (decl)
4588 && DECL_FUNCTION_SCOPE_P (decl)
4589 /* Unfortunately, import_export_decl has not always been called
4590 before the function is processed, so we cannot simply check
4592 && (DECL_COMDAT (DECL_CONTEXT (decl))
4593 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4594 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4595 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4599 /* With weak symbols, we simply make the variable COMDAT;
4600 that will cause copies in multiple translations units to
4602 comdat_linkage (decl);
4606 if (DECL_INITIAL (decl) == NULL_TREE
4607 || DECL_INITIAL (decl) == error_mark_node)
4609 /* Without weak symbols, we can use COMMON to merge
4610 uninitialized variables. */
4611 TREE_PUBLIC (decl) = 1;
4612 DECL_COMMON (decl) = 1;
4616 /* While for initialized variables, we must use internal
4617 linkage -- which means that multiple copies will not
4619 TREE_PUBLIC (decl) = 0;
4620 DECL_COMMON (decl) = 0;
4621 warning (0, "sorry: semantics of inline function static "
4622 "data %q+#D are wrong (you'll wind up "
4623 "with multiple copies)", decl);
4624 warning (0, "%J you can work around this by removing "
4630 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4631 /* Set it up again; we might have set DECL_INITIAL since the last
4633 comdat_linkage (decl);
4636 /* Issue an error message if DECL is an uninitialized const variable. */
4639 check_for_uninitialized_const_var (tree decl)
4641 tree type = TREE_TYPE (decl);
4643 /* ``Unless explicitly declared extern, a const object does not have
4644 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4646 if (TREE_CODE (decl) == VAR_DECL
4647 && TREE_CODE (type) != REFERENCE_TYPE
4648 && CP_TYPE_CONST_P (type)
4649 && !TYPE_NEEDS_CONSTRUCTING (type)
4650 && !DECL_INITIAL (decl))
4651 error ("uninitialized const %qD", decl);
4655 /* Structure holding the current initializer being processed by reshape_init.
4656 CUR is a pointer to the current element being processed, END is a pointer
4657 after the last element present in the initializer. */
4658 typedef struct reshape_iterator_t
4660 constructor_elt *cur;
4661 constructor_elt *end;
4664 static tree reshape_init_r (tree, reshape_iter *, bool);
4666 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4667 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4668 initialized. If there are no more such fields, the return value
4672 next_initializable_field (tree field)
4675 && (TREE_CODE (field) != FIELD_DECL
4676 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4677 || DECL_ARTIFICIAL (field)))
4678 field = TREE_CHAIN (field);
4683 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4684 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4685 INTEGER_CST representing the size of the array minus one (the maximum index),
4686 or NULL_TREE if the array was declared without specifying the size. D is
4687 the iterator within the constructor. */
4690 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4693 bool sized_array_p = (max_index != NULL_TREE);
4694 unsigned HOST_WIDE_INT max_index_cst = 0;
4695 unsigned HOST_WIDE_INT index;
4697 /* The initializer for an array is always a CONSTRUCTOR. */
4698 new_init = build_constructor (init_list_type_node, NULL);
4702 /* Minus 1 is used for zero sized arrays. */
4703 if (integer_all_onesp (max_index))
4706 if (host_integerp (max_index, 1))
4707 max_index_cst = tree_low_cst (max_index, 1);
4708 /* sizetype is sign extended, not zero extended. */
4710 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4714 /* Loop until there are no more initializers. */
4716 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4721 check_array_designated_initializer (d->cur);
4722 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4723 if (elt_init == error_mark_node)
4724 return error_mark_node;
4725 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), NULL_TREE, elt_init);
4731 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4732 Parameters are the same of reshape_init_r. */
4735 reshape_init_array (tree type, reshape_iter *d)
4737 tree max_index = NULL_TREE;
4739 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4741 if (TYPE_DOMAIN (type))
4742 max_index = array_type_nelts (type);
4744 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4747 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4748 Parameters are the same of reshape_init_r. */
4751 reshape_init_vector (tree type, reshape_iter *d)
4753 tree max_index = NULL_TREE;
4756 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4758 if (COMPOUND_LITERAL_P (d->cur->value))
4760 tree value = d->cur->value;
4761 if (!same_type_p (TREE_TYPE (value), type))
4763 error ("invalid type %qT as initializer for a vector of type %qT",
4764 TREE_TYPE (d->cur->value), type);
4765 value = error_mark_node;
4771 /* For a vector, the representation type is a struct
4772 containing a single member which is an array of the
4773 appropriate size. */
4774 rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4775 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4776 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4778 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4781 /* Subroutine of reshape_init_r, processes the initializers for classes
4782 or union. Parameters are the same of reshape_init_r. */
4785 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
4790 gcc_assert (CLASS_TYPE_P (type));
4792 /* The initializer for a class is always a CONSTRUCTOR. */
4793 new_init = build_constructor (init_list_type_node, NULL);
4794 field = next_initializable_field (TYPE_FIELDS (type));
4800 An initializer for an aggregate member that is an
4801 empty class shall have the form of an empty
4802 initializer-list {}. */
4803 if (!first_initializer_p)
4805 error ("initializer for %qT must be brace-enclosed", type);
4806 return error_mark_node;
4811 /* Loop through the initializable fields, gathering initializers. */
4812 while (d->cur != d->end)
4816 /* Handle designated initializers, as an extension. */
4819 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
4821 if (!field || TREE_CODE (field) != FIELD_DECL)
4823 error ("%qT has no non-static data member named %qD", type,
4825 return error_mark_node;
4829 /* If we processed all the member of the class, we are done. */
4833 field_init = reshape_init_r (TREE_TYPE (field), d,
4834 /*first_initializer_p=*/false);
4835 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
4839 When a union is initialized with a brace-enclosed
4840 initializer, the braces shall only contain an
4841 initializer for the first member of the union. */
4842 if (TREE_CODE (type) == UNION_TYPE)
4845 field = next_initializable_field (TREE_CHAIN (field));
4851 /* Subroutine of reshape_init, which processes a single initializer (part of
4852 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
4853 iterator within the CONSTRUCTOR which points to the initializer to process.
4854 FIRST_INITIALIZER_P is true if this is the first initializer of the
4855 CONSTRUCTOR node. */
4858 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
4860 tree init = d->cur->value;
4862 if (error_operand_p (init))
4863 return error_mark_node;
4865 /* A non-aggregate type is always initialized with a single
4867 if (!CP_AGGREGATE_TYPE_P (type))
4869 /* It is invalid to initialize a non-aggregate type with a
4870 brace-enclosed initializer before C++0x.
4871 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
4872 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
4873 a CONSTRUCTOR (with a record type). */
4874 if (TREE_CODE (init) == CONSTRUCTOR
4875 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
4877 if (SCALAR_TYPE_P (type))
4879 error ("braces around scalar initializer for type %qT", type);
4880 init = error_mark_node;
4883 maybe_warn_cpp0x ("extended initializer lists");
4892 All implicit type conversions (clause _conv_) are considered when
4893 initializing the aggregate member with an initializer from an
4894 initializer-list. If the initializer can initialize a member,
4895 the member is initialized. Otherwise, if the member is itself a
4896 non-empty subaggregate, brace elision is assumed and the
4897 initializer is considered for the initialization of the first
4898 member of the subaggregate. */
4899 if (TREE_CODE (init) != CONSTRUCTOR
4900 && can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL))
4906 /* [dcl.init.string]
4908 A char array (whether plain char, signed char, or unsigned char)
4909 can be initialized by a string-literal (optionally enclosed in
4910 braces); a wchar_t array can be initialized by a wide
4911 string-literal (optionally enclosed in braces). */
4912 if (TREE_CODE (type) == ARRAY_TYPE
4913 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4915 tree str_init = init;
4917 /* Strip one level of braces if and only if they enclose a single
4918 element (as allowed by [dcl.init.string]). */
4919 if (!first_initializer_p
4920 && TREE_CODE (str_init) == CONSTRUCTOR
4921 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
4923 str_init = VEC_index (constructor_elt,
4924 CONSTRUCTOR_ELTS (str_init), 0)->value;
4927 /* If it's a string literal, then it's the initializer for the array
4928 as a whole. Otherwise, continue with normal initialization for
4929 array types (one value per array element). */
4930 if (TREE_CODE (str_init) == STRING_CST)
4937 /* The following cases are about aggregates. If we are not within a full
4938 initializer already, and there is not a CONSTRUCTOR, it means that there
4939 is a missing set of braces (that is, we are processing the case for
4940 which reshape_init exists). */
4941 if (!first_initializer_p)
4943 if (TREE_CODE (init) == CONSTRUCTOR)
4945 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
4946 /* There is no need to reshape pointer-to-member function
4947 initializers, as they are always constructed correctly
4948 by the front end. */
4950 else if (COMPOUND_LITERAL_P (init))
4951 /* For a nested compound literal, there is no need to reshape since
4952 brace elision is not allowed. Even if we decided to allow it,
4953 we should add a call to reshape_init in finish_compound_literal,
4954 before calling digest_init, so changing this code would still
4955 not be necessary. */
4956 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
4960 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
4961 return reshape_init (type, init);
4965 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
4969 /* Dispatch to specialized routines. */
4970 if (CLASS_TYPE_P (type))
4971 return reshape_init_class (type, d, first_initializer_p);
4972 else if (TREE_CODE (type) == ARRAY_TYPE)
4973 return reshape_init_array (type, d);
4974 else if (TREE_CODE (type) == VECTOR_TYPE)
4975 return reshape_init_vector (type, d);
4980 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4981 brace-enclosed aggregate initializer.
4983 INIT is the CONSTRUCTOR containing the list of initializers describing
4984 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
4985 It may not presently match the shape of the TYPE; for example:
4987 struct S { int a; int b; };
4988 struct S a[] = { 1, 2, 3, 4 };
4990 Here INIT will hold a VEC of four elements, rather than a
4991 VEC of two elements, each itself a VEC of two elements. This
4992 routine transforms INIT from the former form into the latter. The
4993 revised CONSTRUCTOR node is returned. */
4996 reshape_init (tree type, tree init)
4998 VEC(constructor_elt, gc) *v;
5002 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5004 v = CONSTRUCTOR_ELTS (init);
5006 /* An empty constructor does not need reshaping, and it is always a valid
5008 if (VEC_empty (constructor_elt, v))
5011 /* Recurse on this CONSTRUCTOR. */
5012 d.cur = VEC_index (constructor_elt, v, 0);
5013 d.end = d.cur + VEC_length (constructor_elt, v);
5015 new_init = reshape_init_r (type, &d, true);
5016 if (new_init == error_mark_node)
5017 return error_mark_node;
5019 /* Make sure all the element of the constructor were used. Otherwise,
5020 issue an error about exceeding initializers. */
5022 error ("too many initializers for %qT", type);
5027 /* Verify array initializer. Returns true if errors have been reported. */
5030 check_array_initializer (tree decl, tree type, tree init)
5032 tree element_type = TREE_TYPE (type);
5034 /* The array type itself need not be complete, because the
5035 initializer may tell us how many elements are in the array.
5036 But, the elements of the array must be complete. */
5037 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5040 error ("elements of array %q#D have incomplete type", decl);
5042 error ("elements of array %q#T have incomplete type", type);
5045 /* It is not valid to initialize a VLA. */
5047 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5048 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5051 error ("variable-sized object %qD may not be initialized", decl);
5053 error ("variable-sized compound literal");
5059 /* Subroutine of check_initializer; args are passed down from that function.
5060 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5063 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5066 int saved_stmts_are_full_exprs_p = 0;
5067 if (building_stmt_tree ())
5069 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5070 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5072 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5073 if (building_stmt_tree ())
5074 current_stmt_tree ()->stmts_are_full_exprs_p =
5075 saved_stmts_are_full_exprs_p;
5079 /* Verify INIT (the initializer for DECL), and record the
5080 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5081 grok_reference_init.
5083 If the return value is non-NULL, it is an expression that must be
5084 evaluated dynamically to initialize DECL. */
5087 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5089 tree type = TREE_TYPE (decl);
5090 tree init_code = NULL;
5092 /* Things that are going to be initialized need to have complete
5094 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5096 if (type == error_mark_node)
5097 /* We will have already complained. */
5100 if (TREE_CODE (type) == ARRAY_TYPE)
5102 if (check_array_initializer (decl, type, init))
5105 else if (!COMPLETE_TYPE_P (type))
5107 error ("%qD has incomplete type", decl);
5108 TREE_TYPE (decl) = error_mark_node;
5112 /* There is no way to make a variable-sized class type in GNU C++. */
5113 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5115 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5117 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5118 if (SCALAR_TYPE_P (type))
5122 maybe_warn_cpp0x ("extended initializer lists");
5123 init = build_zero_init (type, NULL_TREE, false);
5125 else if (init_len != 1)
5127 error ("scalar object %qD requires one element in initializer",
5129 TREE_TYPE (decl) = error_mark_node;
5135 if (TREE_CODE (decl) == CONST_DECL)
5137 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5139 DECL_INITIAL (decl) = init;
5141 gcc_assert (init != NULL_TREE);
5144 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
5145 init = grok_reference_init (decl, type, init, cleanup);
5148 /* Do not reshape constructors of vectors (they don't need to be
5150 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5152 if (is_std_init_list (type))
5153 return build_init_list_var_init (decl, type, init, cleanup);
5154 else if (TYPE_NON_AGGREGATE_CLASS (type))
5156 /* Don't reshape if the class has constructors. */
5157 if (cxx_dialect == cxx98)
5158 error ("in C++98 %qD must be initialized by constructor, "
5161 init = build_tree_list (NULL_TREE, init);
5163 else if ((*targetm.vector_opaque_p) (type))
5165 error ("opaque vector types cannot be initialized");
5166 init = error_mark_node;
5169 init = reshape_init (type, init);
5172 /* If DECL has an array type without a specific bound, deduce the
5173 array size from the initializer. */
5174 maybe_deduce_size_from_array_init (decl, init);
5175 type = TREE_TYPE (decl);
5176 if (type == error_mark_node)
5179 if (TYPE_NEEDS_CONSTRUCTING (type)
5180 || (CLASS_TYPE_P (type)
5181 && !BRACE_ENCLOSED_INITIALIZER_P (init)))
5182 return build_aggr_init_full_exprs (decl, init, flags);
5183 else if (TREE_CODE (init) != TREE_VEC)
5185 init_code = store_init_value (decl, init);
5186 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5187 && DECL_INITIAL (decl)
5188 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5189 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5190 warning (0, "array %qD initialized by parenthesized string literal %qE",
5191 decl, DECL_INITIAL (decl));
5195 else if (DECL_EXTERNAL (decl))
5197 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
5198 return build_aggr_init_full_exprs (decl, init, flags);
5199 else if (MAYBE_CLASS_TYPE_P (type))
5201 tree core_type = strip_array_types (type);
5203 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
5204 error ("structure %qD with uninitialized const members", decl);
5205 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
5206 error ("structure %qD with uninitialized reference members", decl);
5208 check_for_uninitialized_const_var (decl);
5211 check_for_uninitialized_const_var (decl);
5213 if (init && init != error_mark_node)
5214 init_code = build2 (INIT_EXPR, type, decl, init);
5219 /* If DECL is not a local variable, give it RTL. */
5222 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5224 int toplev = toplevel_bindings_p ();
5226 const char *filename;
5228 /* Set the DECL_ASSEMBLER_NAME for the object. */
5231 /* The `register' keyword, when used together with an
5232 asm-specification, indicates that the variable should be
5233 placed in a particular register. */
5234 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5236 set_user_assembler_name (decl, asmspec);
5237 DECL_HARD_REGISTER (decl) = 1;
5241 if (TREE_CODE (decl) == FUNCTION_DECL
5242 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5243 set_builtin_user_assembler_name (decl, asmspec);
5244 set_user_assembler_name (decl, asmspec);
5248 /* Handle non-variables up front. */
5249 if (TREE_CODE (decl) != VAR_DECL)
5251 rest_of_decl_compilation (decl, toplev, at_eof);
5255 /* If we see a class member here, it should be a static data
5257 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5259 gcc_assert (TREE_STATIC (decl));
5260 /* An in-class declaration of a static data member should be
5261 external; it is only a declaration, and not a definition. */
5262 if (init == NULL_TREE)
5263 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5266 /* We don't create any RTL for local variables. */
5267 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5270 /* We defer emission of local statics until the corresponding
5271 DECL_EXPR is expanded. */
5272 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5274 /* We try to defer namespace-scope static constants so that they are
5275 not emitted into the object file unnecessarily. */
5276 filename = input_filename;
5277 if (!DECL_VIRTUAL_P (decl)
5278 && TREE_READONLY (decl)
5279 && DECL_INITIAL (decl) != NULL_TREE
5280 && DECL_INITIAL (decl) != error_mark_node
5282 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5284 && !TREE_PUBLIC (decl))
5286 /* Fool with the linkage of static consts according to #pragma
5288 struct c_fileinfo *finfo = get_fileinfo (filename);
5289 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5291 TREE_PUBLIC (decl) = 1;
5292 DECL_EXTERNAL (decl) = finfo->interface_only;
5297 /* Likewise for template instantiations. */
5298 else if (DECL_LANG_SPECIFIC (decl)
5299 && DECL_IMPLICIT_INSTANTIATION (decl))
5302 /* If we're not deferring, go ahead and assemble the variable. */
5304 rest_of_decl_compilation (decl, toplev, at_eof);
5307 /* walk_tree helper for wrap_temporary_cleanups, below. */
5310 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5312 if (TYPE_P (*stmt_p))
5318 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5320 tree guard = (tree)data;
5321 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5323 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5324 /* Tell honor_protect_cleanup_actions to handle this as a separate
5326 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5328 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5334 /* We're initializing a local variable which has a cleanup GUARD. If there
5335 are any temporaries used in the initializer INIT of this variable, we
5336 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5337 variable will be cleaned up properly if one of them throws.
5339 Unfortunately, there's no way to express this properly in terms of
5340 nesting, as the regions for the temporaries overlap the region for the
5341 variable itself; if there are two temporaries, the variable needs to be
5342 the first thing destroyed if either of them throws. However, we only
5343 want to run the variable's cleanup if it actually got constructed. So
5344 we need to guard the temporary cleanups with the variable's cleanup if
5345 they are run on the normal path, but not if they are run on the
5346 exceptional path. We implement this by telling
5347 honor_protect_cleanup_actions to strip the variable cleanup from the
5348 exceptional path. */
5351 wrap_temporary_cleanups (tree init, tree guard)
5353 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5356 /* Generate code to initialize DECL (a local variable). */
5359 initialize_local_var (tree decl, tree init)
5361 tree type = TREE_TYPE (decl);
5365 gcc_assert (TREE_CODE (decl) == VAR_DECL
5366 || TREE_CODE (decl) == RESULT_DECL);
5367 gcc_assert (!TREE_STATIC (decl));
5369 if (DECL_SIZE (decl) == NULL_TREE)
5371 /* If we used it already as memory, it must stay in memory. */
5372 DECL_INITIAL (decl) = NULL_TREE;
5373 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5377 if (type == error_mark_node)
5380 /* Compute and store the initial value. */
5381 already_used = TREE_USED (decl) || TREE_USED (type);
5383 /* Generate a cleanup, if necessary. */
5384 cleanup = cxx_maybe_build_cleanup (decl);
5386 /* Perform the initialization. */
5389 int saved_stmts_are_full_exprs_p;
5391 /* If we're only initializing a single object, guard the destructors
5392 of any temporaries used in its initializer with its destructor.
5393 This isn't right for arrays because each element initialization is
5394 a full-expression. */
5395 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5396 wrap_temporary_cleanups (init, cleanup);
5398 gcc_assert (building_stmt_tree ());
5399 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5400 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5401 finish_expr_stmt (init);
5402 current_stmt_tree ()->stmts_are_full_exprs_p =
5403 saved_stmts_are_full_exprs_p;
5406 /* Set this to 0 so we can tell whether an aggregate which was
5407 initialized was ever used. Don't do this if it has a
5408 destructor, so we don't complain about the 'resource
5409 allocation is initialization' idiom. Now set
5410 attribute((unused)) on types so decls of that type will be
5411 marked used. (see TREE_USED, above.) */
5412 if (TYPE_NEEDS_CONSTRUCTING (type)
5414 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5415 && DECL_NAME (decl))
5416 TREE_USED (decl) = 0;
5417 else if (already_used)
5418 TREE_USED (decl) = 1;
5421 finish_decl_cleanup (decl, cleanup);
5424 /* DECL is a VAR_DECL for a compiler-generated variable with static
5425 storage duration (like a virtual table) whose initializer is a
5426 compile-time constant. INIT must be either a TREE_LIST of values,
5427 or a CONSTRUCTOR. Initialize the variable and provide it to the
5431 initialize_artificial_var (tree decl, tree init)
5433 gcc_assert (DECL_ARTIFICIAL (decl));
5434 if (TREE_CODE (init) == TREE_LIST)
5435 init = build_constructor_from_list (TREE_TYPE (decl), init);
5436 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5437 DECL_INITIAL (decl) = init;
5438 DECL_INITIALIZED_P (decl) = 1;
5439 determine_visibility (decl);
5440 layout_var_decl (decl);
5441 maybe_commonize_var (decl);
5442 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5445 /* INIT is the initializer for a variable, as represented by the
5446 parser. Returns true iff INIT is value-dependent. */
5449 value_dependent_init_p (tree init)
5451 if (TREE_CODE (init) == TREE_LIST)
5452 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5453 return any_value_dependent_elements_p (init);
5454 else if (TREE_CODE (init) == CONSTRUCTOR)
5455 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5457 VEC(constructor_elt, gc) *elts;
5461 elts = CONSTRUCTOR_ELTS (init);
5462 nelts = VEC_length (constructor_elt, elts);
5463 for (i = 0; i < nelts; ++i)
5464 if (value_dependent_init_p (VEC_index (constructor_elt,
5469 /* It must be a simple expression, e.g., int i = 3; */
5470 return value_dependent_expression_p (init);
5475 /* Finish processing of a declaration;
5476 install its line number and initial value.
5477 If the length of an array type is not known before,
5478 it must be determined now, from the initial value, or it is an error.
5480 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5481 true, then INIT is an integral constant expression.
5483 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5484 if the (init) syntax was used. */
5487 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5488 tree asmspec_tree, int flags)
5492 const char *asmspec = NULL;
5493 int was_readonly = 0;
5494 bool var_definition_p = false;
5495 int saved_processing_template_decl;
5498 if (decl == error_mark_node)
5503 error ("assignment (not initialization) in declaration");
5507 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5508 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5509 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5511 type = TREE_TYPE (decl);
5512 if (type == error_mark_node)
5515 /* Assume no cleanup is required. */
5516 cleanup = NULL_TREE;
5517 saved_processing_template_decl = processing_template_decl;
5519 /* If a name was specified, get the string. */
5520 if (global_scope_p (current_binding_level))
5521 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5522 if (asmspec_tree && asmspec_tree != error_mark_node)
5523 asmspec = TREE_STRING_POINTER (asmspec_tree);
5525 if (current_class_type
5526 && CP_DECL_CONTEXT (decl) == current_class_type
5527 && TYPE_BEING_DEFINED (current_class_type)
5528 && (DECL_INITIAL (decl) || init))
5529 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5531 auto_node = type_uses_auto (type);
5534 if (init == NULL_TREE)
5536 error ("declaration of %q#D has no initializer", decl);
5537 TREE_TYPE (decl) = error_mark_node;
5540 if (TREE_CODE (init) == TREE_LIST)
5541 init = build_x_compound_expr_from_list (init, "initializer");
5542 if (describable_type (init))
5544 type = TREE_TYPE (decl) = do_auto_deduction (type, init, auto_node);
5545 if (type == error_mark_node)
5550 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5553 if (init == ridpointers[(int)RID_DELETE])
5555 /* FIXME check this is 1st decl. */
5556 DECL_DELETED_FN (decl) = 1;
5557 DECL_DECLARED_INLINE_P (decl) = 1;
5558 DECL_INITIAL (decl) = error_mark_node;
5559 FOR_EACH_CLONE (clone, decl)
5561 DECL_DELETED_FN (clone) = 1;
5562 DECL_DECLARED_INLINE_P (clone) = 1;
5563 DECL_INITIAL (clone) = error_mark_node;
5567 else if (init == ridpointers[(int)RID_DEFAULT])
5569 if (!defaultable_fn_p (decl))
5571 error ("%qD cannot be defaulted", decl);
5572 DECL_INITIAL (decl) = NULL_TREE;
5576 DECL_DEFAULTED_FN (decl) = 1;
5577 FOR_EACH_CLONE (clone, decl)
5578 DECL_DEFAULTED_FN (clone) = 1;
5583 if (processing_template_decl)
5585 bool type_dependent_p;
5587 /* Add this declaration to the statement-tree. */
5588 if (at_function_scope_p ())
5589 add_decl_expr (decl);
5591 type_dependent_p = dependent_type_p (type);
5593 if (check_for_bare_parameter_packs (init))
5596 DECL_INITIAL (decl) = NULL_TREE;
5599 if (init && init_const_expr_p && TREE_CODE (decl) == VAR_DECL)
5601 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5602 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5603 TREE_CONSTANT (decl) = 1;
5606 /* Generally, initializers in templates are expanded when the
5607 template is instantiated. But, if DECL is an integral
5608 constant static data member, then it can be used in future
5609 integral constant expressions, and its value must be
5612 && DECL_CLASS_SCOPE_P (decl)
5613 && DECL_INTEGRAL_CONSTANT_VAR_P (decl)
5614 && !type_dependent_p
5615 && !value_dependent_init_p (init)))
5618 DECL_INITIAL (decl) = init;
5619 if (TREE_CODE (decl) == VAR_DECL
5620 && !DECL_PRETTY_FUNCTION_P (decl)
5621 && !type_dependent_p)
5622 maybe_deduce_size_from_array_init (decl, init);
5626 if (TREE_CODE (init) == TREE_LIST)
5628 /* If the parenthesized-initializer form was used (e.g.,
5629 "int A<N>::i(X)"), then INIT will be a TREE_LIST of initializer
5630 arguments. (There is generally only one.) We convert them
5633 for (; list; list = TREE_CHAIN (list))
5635 tree elt = TREE_VALUE (list);
5636 TREE_VALUE (list) = fold_non_dependent_expr (elt);
5640 init = fold_non_dependent_expr (init);
5641 processing_template_decl = 0;
5644 /* Take care of TYPE_DECLs up front. */
5645 if (TREE_CODE (decl) == TYPE_DECL)
5647 if (type != error_mark_node
5648 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5650 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5651 warning (0, "shadowing previous type declaration of %q#D", decl);
5652 set_identifier_type_value (DECL_NAME (decl), decl);
5655 /* If we have installed this as the canonical typedef for this
5656 type, and that type has not been defined yet, delay emitting
5657 the debug information for it, as we will emit it later. */
5658 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5659 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5660 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5662 rest_of_decl_compilation (decl, DECL_CONTEXT (decl) == NULL_TREE,
5667 /* A reference will be modified here, as it is initialized. */
5668 if (! DECL_EXTERNAL (decl)
5669 && TREE_READONLY (decl)
5670 && TREE_CODE (type) == REFERENCE_TYPE)
5673 TREE_READONLY (decl) = 0;
5676 if (TREE_CODE (decl) == VAR_DECL)
5678 /* Only PODs can have thread-local storage. Other types may require
5679 various kinds of non-trivial initialization. */
5680 if (DECL_THREAD_LOCAL_P (decl) && !pod_type_p (TREE_TYPE (decl)))
5681 error ("%qD cannot be thread-local because it has non-POD type %qT",
5682 decl, TREE_TYPE (decl));
5683 /* If this is a local variable that will need a mangled name,
5684 register it now. We must do this before processing the
5685 initializer for the variable, since the initialization might
5686 require a guard variable, and since the mangled name of the
5687 guard variable will depend on the mangled name of this
5689 if (DECL_FUNCTION_SCOPE_P (decl)
5690 && TREE_STATIC (decl)
5691 && !DECL_ARTIFICIAL (decl))
5692 push_local_name (decl);
5693 /* Convert the initializer to the type of DECL, if we have not
5694 already initialized DECL. */
5695 if (!DECL_INITIALIZED_P (decl)
5696 /* If !DECL_EXTERNAL then DECL is being defined. In the
5697 case of a static data member initialized inside the
5698 class-specifier, there can be an initializer even if DECL
5699 is *not* defined. */
5700 && (!DECL_EXTERNAL (decl) || init))
5702 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5705 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
5706 /* Allow libjava/prims.cc define primitive classes. */
5707 if (init != NULL_TREE
5708 || jclass == NULL_TREE
5709 || TREE_CODE (jclass) != TYPE_DECL
5710 || !POINTER_TYPE_P (TREE_TYPE (jclass))
5711 || !same_type_ignoring_top_level_qualifiers_p
5712 (type, TREE_TYPE (TREE_TYPE (jclass))))
5713 error ("Java object %qD not allocated with %<new%>", decl);
5718 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5719 if (init_const_expr_p)
5721 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5722 if (DECL_INTEGRAL_CONSTANT_VAR_P (decl))
5723 TREE_CONSTANT (decl) = 1;
5726 init = check_initializer (decl, init, flags, &cleanup);
5727 /* Thread-local storage cannot be dynamically initialized. */
5728 if (DECL_THREAD_LOCAL_P (decl) && init)
5730 error ("%qD is thread-local and so cannot be dynamically "
5731 "initialized", decl);
5735 /* Check that the initializer for a static data member was a
5736 constant. Although we check in the parser that the
5737 initializer is an integral constant expression, we do not
5738 simplify division-by-zero at the point at which it
5739 occurs. Therefore, in:
5741 struct S { static const int i = 7 / 0; };
5743 we issue an error at this point. It would
5744 probably be better to forbid division by zero in
5745 integral constant expressions. */
5746 if (DECL_EXTERNAL (decl) && init)
5748 error ("%qD cannot be initialized by a non-constant expression"
5749 " when being declared", decl);
5750 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
5758 The memory occupied by any object of static storage
5759 duration is zero-initialized at program startup before
5760 any other initialization takes place.
5762 We cannot create an appropriate initializer until after
5763 the type of DECL is finalized. If DECL_INITIAL is set,
5764 then the DECL is statically initialized, and any
5765 necessary zero-initialization has already been performed. */
5766 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
5767 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
5768 /*nelts=*/NULL_TREE,
5769 /*static_storage_p=*/true);
5770 /* Remember that the initialization for this variable has
5772 DECL_INITIALIZED_P (decl) = 1;
5773 /* This declaration is the definition of this variable,
5774 unless we are initializing a static data member within
5775 the class specifier. */
5776 if (!DECL_EXTERNAL (decl))
5777 var_definition_p = true;
5779 /* If the variable has an array type, lay out the type, even if
5780 there is no initializer. It is valid to index through the
5781 array, and we must get TYPE_ALIGN set correctly on the array
5783 else if (TREE_CODE (type) == ARRAY_TYPE)
5786 if (!processing_template_decl
5787 && TREE_STATIC (decl)
5788 && !at_function_scope_p ()
5789 && current_function_decl == NULL)
5790 /* So decl is a global variable or a static member of a
5791 non local class. Record the types it uses
5792 so that we can decide later to emit debug info for them. */
5793 record_types_used_by_current_var_decl (decl);
5795 else if (TREE_CODE (decl) == FIELD_DECL
5796 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
5797 error ("non-static data member %qD has Java class type", decl);
5799 /* Add this declaration to the statement-tree. This needs to happen
5800 after the call to check_initializer so that the DECL_EXPR for a
5801 reference temp is added before the DECL_EXPR for the reference itself. */
5802 if (at_function_scope_p ())
5803 add_decl_expr (decl);
5805 /* Let the middle end know about variables and functions -- but not
5806 static data members in uninstantiated class templates. */
5807 if (!saved_processing_template_decl
5808 && (TREE_CODE (decl) == VAR_DECL
5809 || TREE_CODE (decl) == FUNCTION_DECL))
5811 if (TREE_CODE (decl) == VAR_DECL)
5813 layout_var_decl (decl);
5814 maybe_commonize_var (decl);
5817 /* This needs to happen after the linkage is set. */
5818 determine_visibility (decl);
5820 if (var_definition_p && TREE_STATIC (decl))
5822 /* If a TREE_READONLY variable needs initialization
5823 at runtime, it is no longer readonly and we need to
5824 avoid MEM_READONLY_P being set on RTL created for it. */
5827 if (TREE_READONLY (decl))
5828 TREE_READONLY (decl) = 0;
5831 else if (was_readonly)
5832 TREE_READONLY (decl) = 1;
5835 make_rtl_for_nonlocal_decl (decl, init, asmspec);
5837 /* Check for abstractness of the type. Notice that there is no
5838 need to strip array types here since the check for those types
5839 is already done within create_array_type_for_decl. */
5840 if (TREE_CODE (type) == FUNCTION_TYPE
5841 || TREE_CODE (type) == METHOD_TYPE)
5842 abstract_virtuals_error (decl, TREE_TYPE (type));
5844 abstract_virtuals_error (decl, type);
5846 if (TREE_TYPE (decl) == error_mark_node)
5847 /* No initialization required. */
5849 else if (TREE_CODE (decl) == FUNCTION_DECL)
5853 if (init == ridpointers[(int)RID_DEFAULT])
5855 /* An out-of-class default definition is defined at
5856 the point where it is explicitly defaulted. */
5857 if (DECL_INITIAL (decl) == error_mark_node)
5858 synthesize_method (decl);
5861 error ("function %q#D is initialized like a variable", decl);
5863 /* else no initialization required. */
5865 else if (DECL_EXTERNAL (decl)
5866 && ! (DECL_LANG_SPECIFIC (decl)
5867 && DECL_NOT_REALLY_EXTERN (decl)))
5870 DECL_INITIAL (decl) = init;
5872 /* A variable definition. */
5873 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5874 /* Initialize the local variable. */
5875 initialize_local_var (decl, init);
5877 /* If a variable is defined, and then a subsequent
5878 definition with external linkage is encountered, we will
5879 get here twice for the same variable. We want to avoid
5880 calling expand_static_init more than once. For variables
5881 that are not static data members, we can call
5882 expand_static_init only when we actually process the
5883 initializer. It is not legal to redeclare a static data
5884 member, so this issue does not arise in that case. */
5885 else if (var_definition_p && TREE_STATIC (decl))
5886 expand_static_init (decl, init);
5889 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
5890 reference, insert it in the statement-tree now. */
5892 push_cleanup (decl, cleanup, false);
5895 processing_template_decl = saved_processing_template_decl;
5898 TREE_READONLY (decl) = 1;
5900 /* If this was marked 'used', be sure it will be output. */
5901 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
5902 mark_decl_referenced (decl);
5905 /* This is here for a midend callback from c-common.c. */
5908 finish_decl (tree decl, tree init, tree asmspec_tree)
5910 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, asmspec_tree, 0);
5913 /* Returns a declaration for a VAR_DECL as if:
5915 extern "C" TYPE NAME;
5917 had been seen. Used to create compiler-generated global
5921 declare_global_var (tree name, tree type)
5925 push_to_top_level ();
5926 decl = build_decl (VAR_DECL, name, type);
5927 TREE_PUBLIC (decl) = 1;
5928 DECL_EXTERNAL (decl) = 1;
5929 DECL_ARTIFICIAL (decl) = 1;
5930 /* If the user has explicitly declared this variable (perhaps
5931 because the code we are compiling is part of a low-level runtime
5932 library), then it is possible that our declaration will be merged
5933 with theirs by pushdecl. */
5934 decl = pushdecl (decl);
5935 finish_decl (decl, NULL_TREE, NULL_TREE);
5936 pop_from_top_level ();
5941 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
5942 if "__cxa_atexit" is not being used) corresponding to the function
5943 to be called when the program exits. */
5946 get_atexit_fn_ptr_type (void)
5951 if (!atexit_fn_ptr_type_node)
5953 if (flag_use_cxa_atexit
5954 && !targetm.cxx.use_atexit_for_cxa_atexit ())
5955 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
5956 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
5958 /* The parameter to "atexit" is "void (*)(void)". */
5959 arg_types = void_list_node;
5961 fn_type = build_function_type (void_type_node, arg_types);
5962 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
5965 return atexit_fn_ptr_type_node;
5968 /* Returns a pointer to the `atexit' function. Note that if
5969 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
5970 `__cxa_atexit' function specified in the IA64 C++ ABI. */
5973 get_atexit_node (void)
5980 bool use_aeabi_atexit;
5985 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
5987 /* The declaration for `__cxa_atexit' is:
5989 int __cxa_atexit (void (*)(void *), void *, void *)
5991 We build up the argument types and then then function type
5994 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
5995 /* First, build the pointer-to-function type for the first
5997 fn_ptr_type = get_atexit_fn_ptr_type ();
5998 /* Then, build the rest of the argument types. */
5999 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
6000 if (use_aeabi_atexit)
6002 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6003 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6007 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
6008 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
6010 /* And the final __cxa_atexit type. */
6011 fn_type = build_function_type (integer_type_node, arg_types);
6012 fn_ptr_type = build_pointer_type (fn_type);
6013 if (use_aeabi_atexit)
6014 name = "__aeabi_atexit";
6016 name = "__cxa_atexit";
6020 /* The declaration for `atexit' is:
6022 int atexit (void (*)());
6024 We build up the argument types and then then function type
6026 fn_ptr_type = get_atexit_fn_ptr_type ();
6027 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
6028 /* Build the final atexit type. */
6029 fn_type = build_function_type (integer_type_node, arg_types);
6033 /* Now, build the function declaration. */
6034 push_lang_context (lang_name_c);
6035 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6036 mark_used (atexit_fndecl);
6037 pop_lang_context ();
6038 atexit_node = decay_conversion (atexit_fndecl);
6043 /* Returns the __dso_handle VAR_DECL. */
6046 get_dso_handle_node (void)
6048 if (dso_handle_node)
6049 return dso_handle_node;
6051 /* Declare the variable. */
6052 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6055 return dso_handle_node;
6058 /* Begin a new function with internal linkage whose job will be simply
6059 to destroy some particular variable. */
6061 static GTY(()) int start_cleanup_cnt;
6064 start_cleanup_fn (void)
6069 bool use_cxa_atexit = flag_use_cxa_atexit
6070 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6072 push_to_top_level ();
6074 /* No need to mangle this. */
6075 push_lang_context (lang_name_c);
6077 /* Build the name of the function. */
6078 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6079 /* Build the function declaration. */
6080 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6081 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6082 /* It's a function with internal linkage, generated by the
6084 TREE_PUBLIC (fndecl) = 0;
6085 DECL_ARTIFICIAL (fndecl) = 1;
6086 /* Make the function `inline' so that it is only emitted if it is
6087 actually needed. It is unlikely that it will be inlined, since
6088 it is only called via a function pointer, but we avoid unnecessary
6089 emissions this way. */
6090 DECL_DECLARED_INLINE_P (fndecl) = 1;
6091 DECL_INTERFACE_KNOWN (fndecl) = 1;
6092 /* Build the parameter. */
6097 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6098 DECL_CONTEXT (parmdecl) = fndecl;
6099 TREE_USED (parmdecl) = 1;
6100 DECL_ARGUMENTS (fndecl) = parmdecl;
6104 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6106 pop_lang_context ();
6108 return current_function_decl;
6111 /* Finish the cleanup function begun by start_cleanup_fn. */
6114 end_cleanup_fn (void)
6116 expand_or_defer_fn (finish_function (0));
6118 pop_from_top_level ();
6121 /* Generate code to handle the destruction of DECL, an object with
6122 static storage duration. */
6125 register_dtor_fn (tree decl)
6134 type = TREE_TYPE (decl);
6135 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6136 return void_zero_node;
6138 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6139 a class object, we can just pass the destructor to
6140 "__cxa_atexit"; we don't have to build a temporary function to do
6142 use_dtor = (flag_use_cxa_atexit
6143 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6144 && CLASS_TYPE_P (type));
6149 /* Find the destructor. */
6150 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6151 gcc_assert (idx >= 0);
6152 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6153 /* Make sure it is accessible. */
6154 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6158 /* Call build_cleanup before we enter the anonymous function so
6159 that any access checks will be done relative to the current
6160 scope, rather than the scope of the anonymous function. */
6161 build_cleanup (decl);
6163 /* Now start the function. */
6164 cleanup = start_cleanup_fn ();
6166 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6167 to the original function, rather than the anonymous one. That
6168 will make the back end think that nested functions are in use,
6169 which causes confusion. */
6170 push_deferring_access_checks (dk_no_check);
6171 fcall = build_cleanup (decl);
6172 pop_deferring_access_checks ();
6174 /* Create the body of the anonymous function. */
6175 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6176 finish_expr_stmt (fcall);
6177 finish_compound_stmt (compound_stmt);
6181 /* Call atexit with the cleanup function. */
6182 mark_used (cleanup);
6183 cleanup = build_address (cleanup);
6184 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6190 /* We must convert CLEANUP to the type that "__cxa_atexit"
6192 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6193 /* "__cxa_atexit" will pass the address of DECL to the
6194 cleanup function. */
6196 addr = build_address (decl);
6197 /* The declared type of the parameter to "__cxa_atexit" is
6198 "void *". For plain "T*", we could just let the
6199 machinery in cp_build_function_call convert it -- but if the
6200 type is "cv-qualified T *", then we need to convert it
6201 before passing it in, to avoid spurious errors. */
6202 addr = build_nop (ptr_type_node, addr);
6205 /* Since the cleanup functions we build ignore the address
6206 they're given, there's no reason to pass the actual address
6207 in, and, in general, it's cheaper to pass NULL than any
6209 addr = null_pointer_node;
6210 args = tree_cons (NULL_TREE,
6211 cp_build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0,
6212 tf_warning_or_error),
6214 if (targetm.cxx.use_aeabi_atexit ())
6216 args = tree_cons (NULL_TREE, cleanup, args);
6217 args = tree_cons (NULL_TREE, addr, args);
6221 args = tree_cons (NULL_TREE, addr, args);
6222 args = tree_cons (NULL_TREE, cleanup, args);
6226 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
6227 return cp_build_function_call (get_atexit_node (), args,
6228 tf_warning_or_error);
6231 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6232 is its initializer. Generate code to handle the construction
6233 and destruction of DECL. */
6236 expand_static_init (tree decl, tree init)
6238 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6239 gcc_assert (TREE_STATIC (decl));
6241 /* Some variables require no initialization. */
6243 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
6244 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6247 if (DECL_FUNCTION_SCOPE_P (decl))
6249 /* Emit code to perform this initialization but once. */
6250 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6251 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6252 tree guard, guard_addr;
6253 tree acquire_fn, release_fn, abort_fn;
6256 /* Emit code to perform this initialization but once. This code
6259 static <type> guard;
6260 if (!guard.first_byte) {
6261 if (__cxa_guard_acquire (&guard)) {
6264 // Do initialization.
6265 flag = true; __cxa_guard_release (&guard);
6266 // Register variable for destruction at end of program.
6268 if (!flag) __cxa_guard_abort (&guard);
6272 Note that the `flag' variable is only set to 1 *after* the
6273 initialization is complete. This ensures that an exception,
6274 thrown during the construction, will cause the variable to
6275 reinitialized when we pass through this code again, as per:
6279 If the initialization exits by throwing an exception, the
6280 initialization is not complete, so it will be tried again
6281 the next time control enters the declaration.
6283 This process should be thread-safe, too; multiple threads
6284 should not be able to initialize the variable more than
6287 /* Create the guard variable. */
6288 guard = get_guard (decl);
6290 /* This optimization isn't safe on targets with relaxed memory
6291 consistency. On such targets we force synchronization in
6292 __cxa_guard_acquire. */
6293 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6295 /* Begin the conditional initialization. */
6296 if_stmt = begin_if_stmt ();
6297 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6298 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6301 if (flag_threadsafe_statics)
6303 guard_addr = build_address (guard);
6305 acquire_fn = get_identifier ("__cxa_guard_acquire");
6306 release_fn = get_identifier ("__cxa_guard_release");
6307 abort_fn = get_identifier ("__cxa_guard_abort");
6308 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6310 tree argtypes = tree_cons (NULL_TREE, TREE_TYPE (guard_addr),
6312 tree vfntype = build_function_type (void_type_node, argtypes);
6313 acquire_fn = push_library_fn
6314 (acquire_fn, build_function_type (integer_type_node, argtypes),
6316 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6317 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6321 release_fn = identifier_global_value (release_fn);
6322 abort_fn = identifier_global_value (abort_fn);
6325 inner_if_stmt = begin_if_stmt ();
6326 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6329 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6330 begin = get_target_expr (boolean_false_node);
6331 flag = TARGET_EXPR_SLOT (begin);
6333 TARGET_EXPR_CLEANUP (begin)
6334 = build3 (COND_EXPR, void_type_node, flag,
6336 build_call_n (abort_fn, 1, guard_addr));
6337 CLEANUP_EH_ONLY (begin) = 1;
6339 /* Do the initialization itself. */
6340 init = add_stmt_to_compound (begin, init);
6341 init = add_stmt_to_compound
6342 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6343 init = add_stmt_to_compound
6344 (init, build_call_n (release_fn, 1, guard_addr));
6347 init = add_stmt_to_compound (init, set_guard (guard));
6349 /* Use atexit to register a function for destroying this static
6351 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6353 finish_expr_stmt (init);
6355 if (flag_threadsafe_statics)
6357 finish_compound_stmt (inner_then_clause);
6358 finish_then_clause (inner_if_stmt);
6359 finish_if_stmt (inner_if_stmt);
6362 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6364 finish_compound_stmt (then_clause);
6365 finish_then_clause (if_stmt);
6366 finish_if_stmt (if_stmt);
6370 static_aggregates = tree_cons (init, decl, static_aggregates);
6374 /* Make TYPE a complete type based on INITIAL_VALUE.
6375 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6376 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6377 3 if the initializer list is empty (in pedantic mode). */
6380 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6383 tree type, elt_type;
6387 unsigned HOST_WIDE_INT i;
6390 /* An array of character type can be initialized from a
6391 brace-enclosed string constant.
6393 FIXME: this code is duplicated from reshape_init. Probably
6394 we should just call reshape_init here? */
6395 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6396 && TREE_CODE (initial_value) == CONSTRUCTOR
6397 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6399 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6400 tree value = VEC_index (constructor_elt, v, 0)->value;
6402 if (TREE_CODE (value) == STRING_CST
6403 && VEC_length (constructor_elt, v) == 1)
6404 initial_value = value;
6407 /* If any of the elements are parameter packs, we can't actually
6408 complete this type now because the array size is dependent. */
6409 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6411 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6414 if (PACK_EXPANSION_P (value))
6420 failure = complete_array_type (ptype, initial_value, do_default);
6422 /* We can create the array before the element type is complete, which
6423 means that we didn't have these two bits set in the original type
6424 either. In completing the type, we are expected to propagate these
6425 bits. See also complete_type which does the same thing for arrays
6428 if (TYPE_DOMAIN (type))
6430 elt_type = TREE_TYPE (type);
6431 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6432 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6433 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6439 /* Return zero if something is declared to be a member of type
6440 CTYPE when in the context of CUR_TYPE. STRING is the error
6441 message to print in that case. Otherwise, quietly return 1. */
6444 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6446 if (ctype && ctype != cur_type)
6448 if (flags == DTOR_FLAG)
6449 error ("destructor for alien class %qT cannot be a member", ctype);
6451 error ("constructor for alien class %qT cannot be a member", ctype);
6457 /* Subroutine of `grokdeclarator'. */
6459 /* Generate errors possibly applicable for a given set of specifiers.
6460 This is for ARM $7.1.2. */
6463 bad_specifiers (tree object,
6472 error ("%qD declared as a %<virtual%> %s", object, type);
6474 error ("%qD declared as an %<inline%> %s", object, type);
6476 error ("%<const%> and %<volatile%> function specifiers on "
6477 "%qD invalid in %s declaration",
6480 error ("%q+D declared as a friend", object);
6482 && (TREE_CODE (object) == TYPE_DECL
6483 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6484 && !TYPE_REFFN_P (TREE_TYPE (object))
6485 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6486 error ("%q+D declared with an exception specification", object);
6489 /* DECL is a member function or static data member and is presently
6490 being defined. Check that the definition is taking place in a
6494 check_class_member_definition_namespace (tree decl)
6496 /* These checks only apply to member functions and static data
6498 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6499 || TREE_CODE (decl) == VAR_DECL);
6500 /* We check for problems with specializations in pt.c in
6501 check_specialization_namespace, where we can issue better
6503 if (processing_specialization)
6505 /* There are no restrictions on the placement of
6506 explicit instantiations. */
6507 if (processing_explicit_instantiation)
6511 A member function definition that appears outside of the
6512 class definition shall appear in a namespace scope enclosing
6513 the class definition.
6517 The definition for a static data member shall appear in a
6518 namespace scope enclosing the member's class definition. */
6519 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6520 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6521 decl, DECL_CONTEXT (decl));
6524 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6525 METHOD_TYPE for a non-static member function; QUALS are the
6526 cv-qualifiers that apply to the function. */
6529 build_this_parm (tree type, cp_cv_quals quals)
6534 cp_cv_quals this_quals;
6536 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6537 /* The `this' parameter is implicitly `const'; it cannot be
6539 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6540 qual_type = cp_build_qualified_type (this_type, this_quals);
6541 parm = build_artificial_parm (this_identifier, qual_type);
6542 cp_apply_type_quals_to_decl (this_quals, parm);
6546 /* CTYPE is class type, or null if non-class.
6547 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6549 DECLARATOR is the function's name.
6550 PARMS is a chain of PARM_DECLs for the function.
6551 VIRTUALP is truthvalue of whether the function is virtual or not.
6552 FLAGS are to be passed through to `grokclassfn'.
6553 QUALS are qualifiers indicating whether the function is `const'
6555 RAISES is a list of exceptions that this function can raise.
6556 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6557 not look, and -1 if we should not call `grokclassfn' at all.
6559 SFK is the kind of special function (if any) for the new function.
6561 Returns `NULL_TREE' if something goes wrong, after issuing
6562 applicable error messages. */
6565 grokfndecl (tree ctype,
6569 tree orig_declarator,
6571 enum overload_flags flags,
6578 special_function_kind sfk,
6583 location_t location)
6586 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6590 type = build_exception_variant (type, raises);
6592 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6594 /* If we have an explicit location, use it, otherwise use whatever
6595 build_lang_decl used (probably input_location). */
6596 if (location != UNKNOWN_LOCATION)
6597 DECL_SOURCE_LOCATION (decl) = location;
6599 if (TREE_CODE (type) == METHOD_TYPE)
6602 parm = build_this_parm (type, quals);
6603 TREE_CHAIN (parm) = parms;
6606 DECL_ARGUMENTS (decl) = parms;
6607 for (t = parms; t; t = TREE_CHAIN (t))
6608 DECL_CONTEXT (t) = decl;
6609 /* Propagate volatile out from type to decl. */
6610 if (TYPE_VOLATILE (type))
6611 TREE_THIS_VOLATILE (decl) = 1;
6613 /* Setup decl according to sfk. */
6616 case sfk_constructor:
6617 case sfk_copy_constructor:
6618 DECL_CONSTRUCTOR_P (decl) = 1;
6620 case sfk_destructor:
6621 DECL_DESTRUCTOR_P (decl) = 1;
6627 /* If pointers to member functions use the least significant bit to
6628 indicate whether a function is virtual, ensure a pointer
6629 to this function will have that bit clear. */
6630 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
6631 && TREE_CODE (type) == METHOD_TYPE
6632 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
6633 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
6636 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
6640 ("defining explicit specialization %qD in friend declaration",
6644 tree fns = TREE_OPERAND (orig_declarator, 0);
6645 tree args = TREE_OPERAND (orig_declarator, 1);
6647 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
6649 /* Something like `template <class T> friend void f<T>()'. */
6650 error ("invalid use of template-id %qD in declaration "
6651 "of primary template",
6657 /* A friend declaration of the form friend void f<>(). Record
6658 the information in the TEMPLATE_ID_EXPR. */
6659 SET_DECL_IMPLICIT_INSTANTIATION (decl);
6661 if (TREE_CODE (fns) == COMPONENT_REF)
6663 /* Due to bison parser ickiness, we will have already looked
6664 up an operator_name or PFUNCNAME within the current class
6665 (see template_id in parse.y). If the current class contains
6666 such a name, we'll get a COMPONENT_REF here. Undo that. */
6668 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
6669 == current_class_type);
6670 fns = TREE_OPERAND (fns, 1);
6672 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
6673 || TREE_CODE (fns) == OVERLOAD);
6674 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
6676 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
6677 if (TREE_PURPOSE (t)
6678 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
6680 error ("default arguments are not allowed in declaration "
6681 "of friend template specialization %qD",
6688 error ("%<inline%> is not allowed in declaration of friend "
6689 "template specialization %qD",
6696 /* If this decl has namespace scope, set that up. */
6698 set_decl_namespace (decl, in_namespace, friendp);
6700 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
6702 /* `main' and builtins have implicit 'C' linkage. */
6703 if ((MAIN_NAME_P (declarator)
6704 || (IDENTIFIER_LENGTH (declarator) > 10
6705 && IDENTIFIER_POINTER (declarator)[0] == '_'
6706 && IDENTIFIER_POINTER (declarator)[1] == '_'
6707 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
6708 && current_lang_name == lang_name_cplusplus
6709 && ctype == NULL_TREE
6710 /* NULL_TREE means global namespace. */
6711 && DECL_CONTEXT (decl) == NULL_TREE)
6712 SET_DECL_LANGUAGE (decl, lang_c);
6714 /* Should probably propagate const out from type to decl I bet (mrs). */
6717 DECL_STATIC_FUNCTION_P (decl) = 1;
6718 DECL_CONTEXT (decl) = ctype;
6723 DECL_CONTEXT (decl) = ctype;
6725 check_class_member_definition_namespace (decl);
6728 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6730 if (processing_template_decl)
6731 error ("cannot declare %<::main%> to be a template");
6733 error ("cannot declare %<::main%> to be inline");
6735 error ("cannot declare %<::main%> to be static");
6740 /* Members of anonymous types and local classes have no linkage; make
6741 them internal. If a typedef is made later, this will be changed. */
6742 if (ctype && (TYPE_ANONYMOUS_P (ctype)
6743 || decl_function_context (TYPE_MAIN_DECL (ctype))))
6748 /* [basic.link]: A name with no linkage (notably, the name of a class
6749 or enumeration declared in a local scope) shall not be used to
6750 declare an entity with linkage.
6752 Only check this for public decls for now. See core 319, 389. */
6753 t = no_linkage_check (TREE_TYPE (decl),
6754 /*relaxed_p=*/false);
6757 if (TYPE_ANONYMOUS_P (t))
6759 if (DECL_EXTERN_C_P (decl))
6760 /* Allow this; it's pretty common in C. */;
6763 permerror (input_location, "non-local function %q#D uses anonymous type",
6765 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
6766 permerror (input_location, "%q+#D does not refer to the unqualified "
6767 "type, so it is not used for linkage",
6772 permerror (input_location, "non-local function %q#D uses local type %qT", decl, t);
6776 TREE_PUBLIC (decl) = publicp;
6779 DECL_INTERFACE_KNOWN (decl) = 1;
6780 DECL_NOT_REALLY_EXTERN (decl) = 1;
6783 /* If the declaration was declared inline, mark it as such. */
6785 DECL_DECLARED_INLINE_P (decl) = 1;
6787 DECL_EXTERNAL (decl) = 1;
6788 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
6791 ? G_("static member function %qD cannot have cv-qualifier")
6792 : G_("non-member function %qD cannot have cv-qualifier"),
6794 quals = TYPE_UNQUALIFIED;
6797 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
6798 && !grok_op_properties (decl, /*complain=*/true))
6801 if (ctype && decl_function_context (decl))
6802 DECL_NO_STATIC_CHAIN (decl) = 1;
6805 /* Make the init_value nonzero so pushdecl knows this is not
6806 tentative. error_mark_node is replaced later with the BLOCK. */
6807 DECL_INITIAL (decl) = error_mark_node;
6809 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
6810 TREE_NOTHROW (decl) = 1;
6812 /* Caller will do the rest of this. */
6816 if (ctype != NULL_TREE)
6817 grokclassfn (ctype, decl, flags);
6819 decl = check_explicit_specialization (orig_declarator, decl,
6822 4 * (friendp != 0));
6823 if (decl == error_mark_node)
6828 cplus_decl_attributes (&decl, *attrlist, 0);
6829 *attrlist = NULL_TREE;
6832 /* Check main's type after attributes have been applied. */
6833 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
6835 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
6838 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
6840 error ("%<::main%> must return %<int%>");
6841 newtype = build_function_type (integer_type_node, oldtypeargs);
6842 TREE_TYPE (decl) = newtype;
6845 check_main_parameter_types (decl);
6848 if (ctype != NULL_TREE
6849 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
6852 tree old_decl = check_classfn (ctype, decl,
6853 (processing_template_decl
6854 > template_class_depth (ctype))
6855 ? current_template_parms
6858 if (old_decl == error_mark_node)
6866 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
6867 /* Because grokfndecl is always supposed to return a
6868 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
6869 here. We depend on our callers to figure out that its
6870 really a template that's being returned. */
6871 old_decl = DECL_TEMPLATE_RESULT (old_decl);
6873 if (DECL_STATIC_FUNCTION_P (old_decl)
6874 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
6875 /* Remove the `this' parm added by grokclassfn.
6876 XXX Isn't this done in start_function, too? */
6877 revert_static_member_fn (decl);
6878 if (DECL_ARTIFICIAL (old_decl))
6880 error ("definition of implicitly-declared %qD", old_decl);
6884 /* Since we've smashed OLD_DECL to its
6885 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
6886 if (TREE_CODE (decl) == TEMPLATE_DECL)
6887 decl = DECL_TEMPLATE_RESULT (decl);
6889 /* Attempt to merge the declarations. This can fail, in
6890 the case of some invalid specialization declarations. */
6891 pushed_scope = push_scope (ctype);
6892 ok = duplicate_decls (decl, old_decl, friendp);
6894 pop_scope (pushed_scope);
6897 error ("no %q#D member function declared in class %qT",
6905 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
6908 if (ctype == NULL_TREE || check)
6912 DECL_VIRTUAL_P (decl) = 1;
6917 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
6918 the linkage that DECL will receive in the object file. */
6921 set_linkage_for_static_data_member (tree decl)
6923 /* A static data member always has static storage duration and
6924 external linkage. Note that static data members are forbidden in
6925 local classes -- the only situation in which a class has
6926 non-external linkage. */
6927 TREE_PUBLIC (decl) = 1;
6928 TREE_STATIC (decl) = 1;
6929 /* For non-template classes, static data members are always put
6930 out in exactly those files where they are defined, just as
6931 with ordinary namespace-scope variables. */
6932 if (!processing_template_decl)
6933 DECL_INTERFACE_KNOWN (decl) = 1;
6936 /* Create a VAR_DECL named NAME with the indicated TYPE.
6938 If SCOPE is non-NULL, it is the class type or namespace containing
6939 the variable. If SCOPE is NULL, the variable should is created in
6940 the innermost enclosings scope. */
6943 grokvardecl (tree type,
6945 const cp_decl_specifier_seq *declspecs,
6951 tree explicit_scope;
6953 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
6955 /* Compute the scope in which to place the variable, but remember
6956 whether or not that scope was explicitly specified by the user. */
6957 explicit_scope = scope;
6960 /* An explicit "extern" specifier indicates a namespace-scope
6962 if (declspecs->storage_class == sc_extern)
6963 scope = current_namespace;
6964 else if (!at_function_scope_p ())
6965 scope = current_scope ();
6969 && (/* If the variable is a namespace-scope variable declared in a
6970 template, we need DECL_LANG_SPECIFIC. */
6971 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
6972 /* Similarly for namespace-scope variables with language linkage
6974 || (TREE_CODE (scope) == NAMESPACE_DECL
6975 && current_lang_name != lang_name_cplusplus)
6976 /* Similarly for static data members. */
6978 decl = build_lang_decl (VAR_DECL, name, type);
6980 decl = build_decl (VAR_DECL, name, type);
6982 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
6983 set_decl_namespace (decl, explicit_scope, 0);
6985 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
6987 if (declspecs->storage_class == sc_extern)
6989 DECL_THIS_EXTERN (decl) = 1;
6990 DECL_EXTERNAL (decl) = !initialized;
6993 if (DECL_CLASS_SCOPE_P (decl))
6995 set_linkage_for_static_data_member (decl);
6996 /* This function is only called with out-of-class definitions. */
6997 DECL_EXTERNAL (decl) = 0;
6998 check_class_member_definition_namespace (decl);
7000 /* At top level, either `static' or no s.c. makes a definition
7001 (perhaps tentative), and absence of `static' makes it public. */
7002 else if (toplevel_bindings_p ())
7004 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7005 && (DECL_THIS_EXTERN (decl) || ! constp));
7006 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7008 /* Not at top level, only `static' makes a static definition. */
7011 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7012 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7015 if (declspecs->specs[(int)ds_thread])
7016 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7018 if (TREE_PUBLIC (decl))
7020 /* [basic.link]: A name with no linkage (notably, the name of a class
7021 or enumeration declared in a local scope) shall not be used to
7022 declare an entity with linkage.
7024 Only check this for public decls for now. */
7025 tree t = no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false);
7028 if (TYPE_ANONYMOUS_P (t))
7030 if (DECL_EXTERN_C_P (decl))
7031 /* Allow this; it's pretty common in C. */
7035 /* DRs 132, 319 and 389 seem to indicate types with
7036 no linkage can only be used to declare extern "C"
7037 entities. Since it's not always an error in the
7038 ISO C++ 90 Standard, we only issue a warning. */
7039 warning (0, "non-local variable %q#D uses anonymous type",
7041 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7042 warning (0, "%q+#D does not refer to the unqualified "
7043 "type, so it is not used for linkage",
7048 warning (0, "non-local variable %q#D uses local type %qT", decl, t);
7052 DECL_INTERFACE_KNOWN (decl) = 1;
7057 /* Create and return a canonical pointer to member function type, for
7058 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7061 build_ptrmemfunc_type (tree type)
7065 tree unqualified_variant = NULL_TREE;
7067 if (type == error_mark_node)
7070 /* If a canonical type already exists for this type, use it. We use
7071 this method instead of type_hash_canon, because it only does a
7072 simple equality check on the list of field members. */
7074 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7077 /* Make sure that we always have the unqualified pointer-to-member
7079 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7081 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7083 t = make_class_type (RECORD_TYPE);
7084 xref_basetypes (t, NULL_TREE);
7086 /* Let the front end know this is a pointer to member function... */
7087 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7088 /* ... and not really a class type. */
7089 SET_CLASS_TYPE_P (t, 0);
7091 field = build_decl (FIELD_DECL, pfn_identifier, type);
7094 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
7095 TREE_CHAIN (field) = fields;
7098 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7100 /* Zap out the name so that the back end will give us the debugging
7101 information for this anonymous RECORD_TYPE. */
7102 TYPE_NAME (t) = NULL_TREE;
7104 /* If this is not the unqualified form of this pointer-to-member
7105 type, set the TYPE_MAIN_VARIANT for this type to be the
7106 unqualified type. Since they are actually RECORD_TYPEs that are
7107 not variants of each other, we must do this manually. */
7108 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7110 t = build_qualified_type (t, cp_type_quals (type));
7111 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7112 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7113 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7114 TREE_TYPE (TYPE_BINFO (t)) = t;
7117 /* Cache this pointer-to-member type so that we can find it again
7119 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7121 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7122 SET_TYPE_STRUCTURAL_EQUALITY (t);
7123 else if (TYPE_CANONICAL (type) != type)
7124 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7129 /* Create and return a pointer to data member type. */
7132 build_ptrmem_type (tree class_type, tree member_type)
7134 if (TREE_CODE (member_type) == METHOD_TYPE)
7136 tree arg_types = TYPE_ARG_TYPES (member_type);
7137 cp_cv_quals quals = cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)));
7138 member_type = build_memfn_type (member_type, class_type, quals);
7139 return build_ptrmemfunc_type (build_pointer_type (member_type));
7143 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7144 return build_offset_type (class_type, member_type);
7148 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7149 Check to see that the definition is valid. Issue appropriate error
7150 messages. Return 1 if the definition is particularly bad, or 0
7154 check_static_variable_definition (tree decl, tree type)
7156 /* Motion 10 at San Diego: If a static const integral data member is
7157 initialized with an integral constant expression, the initializer
7158 may appear either in the declaration (within the class), or in
7159 the definition, but not both. If it appears in the class, the
7160 member is a member constant. The file-scope definition is always
7162 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7164 error ("invalid in-class initialization of static data member "
7165 "of non-integral type %qT",
7167 /* If we just return the declaration, crashes will sometimes
7168 occur. We therefore return void_type_node, as if this were a
7169 friend declaration, to cause callers to completely ignore
7170 this declaration. */
7173 else if (!CP_TYPE_CONST_P (type))
7174 error ("ISO C++ forbids in-class initialization of non-const "
7175 "static member %qD",
7177 else if (!INTEGRAL_TYPE_P (type))
7178 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7179 "%qD of non-integral type %qT", decl, type);
7184 /* Given the SIZE (i.e., number of elements) in an array, compute an
7185 appropriate index type for the array. If non-NULL, NAME is the
7186 name of the thing being declared. */
7189 compute_array_index_type (tree name, tree size)
7193 tree abi_1_itype = NULL_TREE;
7195 if (error_operand_p (size))
7196 return error_mark_node;
7198 type = TREE_TYPE (size);
7199 /* The array bound must be an integer type. */
7200 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
7203 error ("size of array %qD has non-integral type %qT", name, type);
7205 error ("size of array has non-integral type %qT", type);
7206 size = integer_one_node;
7207 type = TREE_TYPE (size);
7210 /* We can only call value_dependent_expression_p on integral constant
7211 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7212 set if this isn't one. */
7213 if (processing_template_decl
7214 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7216 /* We cannot do any checking for a SIZE that isn't known to be
7217 constant. Just build the index type and mark that it requires
7218 structural equality checks. */
7219 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7220 size, integer_one_node));
7221 TYPE_DEPENDENT_P (itype) = 1;
7222 TYPE_DEPENDENT_P_VALID (itype) = 1;
7223 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7227 if (!abi_version_at_least (2) && processing_template_decl)
7228 /* For abi-1, we handled all instances in templates the same way,
7229 even when they were non-dependent. This affects the manglings
7230 produced. So, we do the normal checking for non-dependent
7231 sizes, but at the end we'll return the same type that abi-1
7232 would have, but with TYPE_CANONICAL set to the "right"
7233 value that the current ABI would provide. */
7234 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7235 size, integer_one_node));
7237 /* The size might be the result of a cast. */
7238 STRIP_TYPE_NOPS (size);
7240 /* It might be a const variable or enumeration constant. */
7241 size = integral_constant_value (size);
7243 /* Normally, the array-bound will be a constant. */
7244 if (TREE_CODE (size) == INTEGER_CST)
7246 /* Check to see if the array bound overflowed. Make that an
7247 error, no matter how generous we're being. */
7248 constant_expression_error (size);
7250 /* An array must have a positive number of elements. */
7251 if (INT_CST_LT (size, integer_zero_node))
7254 error ("size of array %qD is negative", name);
7256 error ("size of array is negative");
7257 size = integer_one_node;
7259 /* As an extension we allow zero-sized arrays. We always allow
7260 them in system headers because glibc uses them. */
7261 else if (integer_zerop (size) && !in_system_header)
7264 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7266 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7269 else if (TREE_CONSTANT (size))
7271 /* `(int) &fn' is not a valid array bound. */
7273 error ("size of array %qD is not an integral constant-expression",
7276 error ("size of array is not an integral constant-expression");
7277 size = integer_one_node;
7279 else if (pedantic && warn_vla != 0)
7282 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7284 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7286 else if (warn_vla > 0)
7290 "variable length array %qD is used", name);
7293 "variable length array is used");
7296 if (processing_template_decl && !TREE_CONSTANT (size))
7297 /* A variable sized array. */
7298 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7301 HOST_WIDE_INT saved_processing_template_decl;
7303 /* Compute the index of the largest element in the array. It is
7304 one less than the number of elements in the array. We save
7305 and restore PROCESSING_TEMPLATE_DECL so that computations in
7306 cp_build_binary_op will be appropriately folded. */
7307 saved_processing_template_decl = processing_template_decl;
7308 processing_template_decl = 0;
7309 itype = cp_build_binary_op (input_location,
7311 cp_convert (ssizetype, size),
7312 cp_convert (ssizetype, integer_one_node),
7313 tf_warning_or_error);
7314 itype = fold (itype);
7315 processing_template_decl = saved_processing_template_decl;
7317 if (!TREE_CONSTANT (itype))
7318 /* A variable sized array. */
7319 itype = variable_size (itype);
7320 /* Make sure that there was no overflow when creating to a signed
7321 index type. (For example, on a 32-bit machine, an array with
7322 size 2^32 - 1 is too big.) */
7323 else if (TREE_CODE (itype) == INTEGER_CST
7324 && TREE_OVERFLOW (itype))
7326 error ("overflow in array dimension");
7327 TREE_OVERFLOW (itype) = 0;
7331 /* Create and return the appropriate index type. */
7334 tree t = build_index_type (itype);
7335 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7339 return build_index_type (itype);
7342 /* Returns the scope (if any) in which the entity declared by
7343 DECLARATOR will be located. If the entity was declared with an
7344 unqualified name, NULL_TREE is returned. */
7347 get_scope_of_declarator (const cp_declarator *declarator)
7349 while (declarator && declarator->kind != cdk_id)
7350 declarator = declarator->declarator;
7352 /* If the declarator-id is a SCOPE_REF, the scope in which the
7353 declaration occurs is the first operand. */
7355 && declarator->u.id.qualifying_scope)
7356 return declarator->u.id.qualifying_scope;
7358 /* Otherwise, the declarator is not a qualified name; the entity will
7359 be declared in the current scope. */
7363 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7364 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7368 create_array_type_for_decl (tree name, tree type, tree size)
7370 tree itype = NULL_TREE;
7371 const char* error_msg;
7373 /* If things have already gone awry, bail now. */
7374 if (type == error_mark_node || size == error_mark_node)
7375 return error_mark_node;
7377 /* Assume that everything will go OK. */
7380 /* There are some types which cannot be array elements. */
7381 switch (TREE_CODE (type))
7384 error_msg = "array of void";
7388 error_msg = "array of functions";
7391 case REFERENCE_TYPE:
7392 error_msg = "array of references";
7396 error_msg = "array of function members";
7403 /* If something went wrong, issue an error-message and return. */
7407 error ("declaration of %qD as %s", name, error_msg);
7409 error ("creating %s", error_msg);
7411 return error_mark_node;
7416 The constant expressions that specify the bounds of the arrays
7417 can be omitted only for the first member of the sequence. */
7418 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7421 error ("declaration of %qD as multidimensional array must "
7422 "have bounds for all dimensions except the first",
7425 error ("multidimensional array must have bounds for all "
7426 "dimensions except the first");
7428 return error_mark_node;
7431 /* Figure out the index type for the array. */
7433 itype = compute_array_index_type (name, size);
7436 T is called the array element type; this type shall not be [...] an
7437 abstract class type. */
7438 abstract_virtuals_error (name, type);
7440 return build_cplus_array_type (type, itype);
7443 /* Check that it's OK to declare a function with the indicated TYPE.
7444 SFK indicates the kind of special function (if any) that this
7445 function is. OPTYPE is the type given in a conversion operator
7446 declaration, or the class type for a constructor/destructor.
7447 Returns the actual return type of the function; that
7448 may be different than TYPE if an error occurs, or for certain
7449 special functions. */
7452 check_special_function_return_type (special_function_kind sfk,
7458 case sfk_constructor:
7460 error ("return type specification for constructor invalid");
7462 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7463 type = build_pointer_type (optype);
7465 type = void_type_node;
7468 case sfk_destructor:
7470 error ("return type specification for destructor invalid");
7471 /* We can't use the proper return type here because we run into
7472 problems with ambiguous bases and covariant returns.
7473 Java classes are left unchanged because (void *) isn't a valid
7474 Java type, and we don't want to change the Java ABI. */
7475 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7476 type = build_pointer_type (void_type_node);
7478 type = void_type_node;
7481 case sfk_conversion:
7483 error ("return type specified for %<operator %T%>", optype);
7494 /* A variable or data member (whose unqualified name is IDENTIFIER)
7495 has been declared with the indicated TYPE. If the TYPE is not
7496 acceptable, issue an error message and return a type to use for
7497 error-recovery purposes. */
7500 check_var_type (tree identifier, tree type)
7502 if (VOID_TYPE_P (type))
7505 error ("unnamed variable or field declared void");
7506 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7508 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7509 error ("variable or field %qE declared void", identifier);
7512 error ("variable or field declared void");
7513 type = error_mark_node;
7519 /* Given declspecs and a declarator (abstract or otherwise), determine
7520 the name and type of the object declared and construct a DECL node
7523 DECLSPECS points to the representation of declaration-specifier
7524 sequence that precedes declarator.
7526 DECL_CONTEXT says which syntactic context this declaration is in:
7527 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7528 FUNCDEF for a function definition. Like NORMAL but a few different
7529 error messages in each case. Return value may be zero meaning
7530 this definition is too screwy to try to parse.
7531 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7532 handle member functions (which have FIELD context).
7533 Return value may be zero meaning this definition is too screwy to
7535 PARM for a parameter declaration (either within a function prototype
7536 or before a function body). Make a PARM_DECL, or return void_type_node.
7537 CATCHPARM for a parameter declaration before a catch clause.
7538 TYPENAME if for a typename (in a cast or sizeof).
7539 Don't make a DECL node; just return the ..._TYPE node.
7540 FIELD for a struct or union field; make a FIELD_DECL.
7541 BITFIELD for a field with specified width.
7542 INITIALIZED is as for start_decl.
7544 ATTRLIST is a pointer to the list of attributes, which may be NULL
7545 if there are none; *ATTRLIST may be modified if attributes from inside
7546 the declarator should be applied to the declaration.
7548 When this function is called, scoping variables (such as
7549 CURRENT_CLASS_TYPE) should reflect the scope in which the
7550 declaration occurs, not the scope in which the new declaration will
7551 be placed. For example, on:
7555 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7558 Returns a DECL (if a declarator is present), a TYPE (if there is no
7559 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7563 grokdeclarator (const cp_declarator *declarator,
7564 const cp_decl_specifier_seq *declspecs,
7565 enum decl_context decl_context,
7569 tree type = NULL_TREE;
7571 int virtualp, explicitp, friendp, inlinep, staticp;
7572 int explicit_int = 0;
7573 int explicit_char = 0;
7574 int defaulted_int = 0;
7575 tree dependent_name = NULL_TREE;
7577 tree typedef_decl = NULL_TREE;
7578 const char *name = NULL;
7579 tree typedef_type = NULL_TREE;
7580 /* True if this declarator is a function definition. */
7581 bool funcdef_flag = false;
7582 cp_declarator_kind innermost_code = cdk_error;
7585 /* See the code below that used this. */
7586 tree decl_attr = NULL_TREE;
7589 /* Keep track of what sort of function is being processed
7590 so that we can warn about default return values, or explicit
7591 return values which do not match prescribed defaults. */
7592 special_function_kind sfk = sfk_none;
7594 tree dname = NULL_TREE;
7595 tree ctor_return_type = NULL_TREE;
7596 enum overload_flags flags = NO_SPECIAL;
7597 /* cv-qualifiers that apply to the declarator, for a declaration of
7598 a member function. */
7599 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7600 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7602 tree raises = NULL_TREE;
7603 int template_count = 0;
7604 tree returned_attrs = NULL_TREE;
7605 tree parms = NULL_TREE;
7606 const cp_declarator *id_declarator;
7607 /* The unqualified name of the declarator; either an
7608 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7609 tree unqualified_id;
7610 /* The class type, if any, in which this entity is located,
7611 or NULL_TREE if none. Note that this value may be different from
7612 the current class type; for example if an attempt is made to declare
7613 "A::f" inside "B", this value will be "A". */
7614 tree ctype = current_class_type;
7615 /* The NAMESPACE_DECL for the namespace in which this entity is
7616 located. If an unqualified name is used to declare the entity,
7617 this value will be NULL_TREE, even if the entity is located at
7619 tree in_namespace = NULL_TREE;
7620 cp_storage_class storage_class;
7621 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7622 bool type_was_error_mark_node = false;
7623 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7624 bool template_type_arg = false;
7626 signed_p = declspecs->specs[(int)ds_signed];
7627 unsigned_p = declspecs->specs[(int)ds_unsigned];
7628 short_p = declspecs->specs[(int)ds_short];
7629 long_p = declspecs->specs[(int)ds_long];
7630 longlong = declspecs->specs[(int)ds_long] >= 2;
7631 thread_p = declspecs->specs[(int)ds_thread];
7633 if (decl_context == FUNCDEF)
7634 funcdef_flag = true, decl_context = NORMAL;
7635 else if (decl_context == MEMFUNCDEF)
7636 funcdef_flag = true, decl_context = FIELD;
7637 else if (decl_context == BITFIELD)
7638 bitfield = 1, decl_context = FIELD;
7639 else if (decl_context == TEMPLATE_TYPE_ARG)
7640 template_type_arg = true, decl_context = TYPENAME;
7642 if (initialized > 1)
7643 funcdef_flag = true;
7645 /* Look inside a declarator for the name being declared
7646 and get it as a string, for an error message. */
7647 for (id_declarator = declarator;
7649 id_declarator = id_declarator->declarator)
7651 if (id_declarator->kind != cdk_id)
7652 innermost_code = id_declarator->kind;
7654 switch (id_declarator->kind)
7657 if (id_declarator->declarator
7658 && id_declarator->declarator->kind == cdk_id)
7660 sfk = id_declarator->declarator->u.id.sfk;
7661 if (sfk == sfk_destructor)
7668 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7669 tree decl = id_declarator->u.id.unqualified_name;
7672 if (qualifying_scope)
7674 if (at_function_scope_p ())
7678 A declarator-id shall not be qualified except
7681 None of the cases are permitted in block
7683 if (qualifying_scope == global_namespace)
7684 error ("invalid use of qualified-name %<::%D%>",
7686 else if (TYPE_P (qualifying_scope))
7687 error ("invalid use of qualified-name %<%T::%D%>",
7688 qualifying_scope, decl);
7690 error ("invalid use of qualified-name %<%D::%D%>",
7691 qualifying_scope, decl);
7692 return error_mark_node;
7694 else if (TYPE_P (qualifying_scope))
7696 ctype = qualifying_scope;
7697 if (innermost_code != cdk_function
7698 && current_class_type
7699 && !UNIQUELY_DERIVED_FROM_P (ctype,
7700 current_class_type))
7702 error ("type %qT is not derived from type %qT",
7703 ctype, current_class_type);
7704 return error_mark_node;
7707 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7708 in_namespace = qualifying_scope;
7710 switch (TREE_CODE (decl))
7716 if (innermost_code != cdk_function)
7718 error ("declaration of %qD as non-function", decl);
7719 return error_mark_node;
7721 else if (!qualifying_scope
7722 && !(current_class_type && at_class_scope_p ()))
7724 error ("declaration of %qD as non-member", decl);
7725 return error_mark_node;
7728 type = TREE_OPERAND (decl, 0);
7730 type = constructor_name (type);
7731 name = IDENTIFIER_POINTER (type);
7736 case TEMPLATE_ID_EXPR:
7738 tree fns = TREE_OPERAND (decl, 0);
7741 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7743 gcc_assert (is_overloaded_fn (dname));
7744 dname = DECL_NAME (get_first_fn (dname));
7749 case IDENTIFIER_NODE:
7750 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7753 if (C_IS_RESERVED_WORD (dname))
7755 error ("declarator-id missing; using reserved word %qD",
7757 name = IDENTIFIER_POINTER (dname);
7759 else if (!IDENTIFIER_TYPENAME_P (dname))
7760 name = IDENTIFIER_POINTER (dname);
7763 gcc_assert (flags == NO_SPECIAL);
7764 flags = TYPENAME_FLAG;
7765 ctor_return_type = TREE_TYPE (dname);
7766 sfk = sfk_conversion;
7767 if (is_typename_at_global_scope (dname))
7768 name = IDENTIFIER_POINTER (dname);
7770 name = "<invalid operator>";
7787 return error_mark_node;
7792 if (id_declarator->kind == cdk_id)
7798 The declarator in a function-definition shall have the form
7799 D1 ( parameter-declaration-clause) ... */
7800 if (funcdef_flag && innermost_code != cdk_function)
7802 error ("function definition does not declare parameters");
7803 return error_mark_node;
7806 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7807 && innermost_code != cdk_function
7808 && ! (ctype && !declspecs->any_specifiers_p))
7810 error ("declaration of %qD as non-function", dname);
7811 return error_mark_node;
7814 /* Anything declared one level down from the top level
7815 must be one of the parameters of a function
7816 (because the body is at least two levels down). */
7818 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7819 by not allowing C++ class definitions to specify their parameters
7820 with xdecls (must be spec.d in the parmlist).
7822 Since we now wait to push a class scope until we are sure that
7823 we are in a legitimate method context, we must set oldcname
7824 explicitly (since current_class_name is not yet alive).
7826 We also want to avoid calling this a PARM if it is in a namespace. */
7828 if (decl_context == NORMAL && !toplevel_bindings_p ())
7830 struct cp_binding_level *b = current_binding_level;
7831 current_binding_level = b->level_chain;
7832 if (current_binding_level != 0 && toplevel_bindings_p ())
7833 decl_context = PARM;
7834 current_binding_level = b;
7838 name = decl_context == PARM ? "parameter" : "type name";
7840 /* If there were multiple types specified in the decl-specifier-seq,
7841 issue an error message. */
7842 if (declspecs->multiple_types_p)
7844 error ("two or more data types in declaration of %qs", name);
7845 return error_mark_node;
7848 if (declspecs->conflicting_specifiers_p)
7850 error ("conflicting specifiers in declaration of %qs", name);
7851 return error_mark_node;
7854 /* Extract the basic type from the decl-specifier-seq. */
7855 type = declspecs->type;
7856 if (type == error_mark_node)
7859 type_was_error_mark_node = true;
7861 /* If the entire declaration is itself tagged as deprecated then
7862 suppress reports of deprecated items. */
7863 if (type && TREE_DEPRECATED (type)
7864 && deprecated_state != DEPRECATED_SUPPRESS)
7865 warn_deprecated_use (type);
7866 if (type && TREE_CODE (type) == TYPE_DECL)
7868 typedef_decl = type;
7869 type = TREE_TYPE (typedef_decl);
7870 if (TREE_DEPRECATED (type)
7871 && DECL_ARTIFICIAL (typedef_decl)
7872 && deprecated_state != DEPRECATED_SUPPRESS)
7873 warn_deprecated_use (type);
7875 /* No type at all: default to `int', and set DEFAULTED_INT
7876 because it was not a user-defined typedef. */
7877 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7879 /* These imply 'int'. */
7880 type = integer_type_node;
7884 explicit_int = declspecs->explicit_int_p;
7885 explicit_char = declspecs->explicit_char_p;
7888 /* See the code below that used this. */
7890 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7892 typedef_type = type;
7895 if (sfk != sfk_conversion)
7896 ctor_return_type = ctype;
7898 if (sfk != sfk_none)
7899 type = check_special_function_return_type (sfk, type,
7901 else if (type == NULL_TREE)
7907 /* We handle `main' specially here, because 'main () { }' is so
7908 common. With no options, it is allowed. With -Wreturn-type,
7909 it is a warning. It is only an error with -pedantic-errors. */
7910 is_main = (funcdef_flag
7911 && dname && MAIN_NAME_P (dname)
7912 && ctype == NULL_TREE
7913 && in_namespace == NULL_TREE
7914 && current_namespace == global_namespace);
7916 if (type_was_error_mark_node)
7917 /* We've already issued an error, don't complain more. */;
7918 else if (in_system_header || flag_ms_extensions)
7919 /* Allow it, sigh. */;
7921 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7923 pedwarn (input_location, OPT_pedantic,
7924 "ISO C++ forbids declaration of %qs with no type", name);
7926 warning (OPT_Wreturn_type,
7927 "ISO C++ forbids declaration of %qs with no type", name);
7929 type = integer_type_node;
7934 /* Now process the modifiers that were specified
7935 and check for invalid combinations. */
7937 /* Long double is a special combination. */
7938 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7941 type = build_qualified_type (long_double_type_node,
7942 cp_type_quals (type));
7945 /* Check all other uses of type modifiers. */
7947 if (unsigned_p || signed_p || long_p || short_p)
7951 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7952 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7953 else if (signed_p && unsigned_p)
7954 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7955 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7956 error ("%<long long%> invalid for %qs", name);
7957 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7958 error ("%<long%> invalid for %qs", name);
7959 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7960 error ("%<short%> invalid for %qs", name);
7961 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7962 error ("%<long%> or %<short%> invalid for %qs", name);
7963 else if ((long_p || short_p) && explicit_char)
7964 error ("%<long%> or %<short%> specified with char for %qs", name);
7965 else if (long_p && short_p)
7966 error ("%<long%> and %<short%> specified together for %qs", name);
7967 else if (type == char16_type_node || type == char32_type_node)
7969 if (signed_p || unsigned_p)
7970 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7971 else if (short_p || long_p)
7972 error ("%<short%> or %<long%> invalid for %qs", name);
7977 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7979 pedwarn (input_location, OPT_pedantic,
7980 "long, short, signed or unsigned used invalidly for %qs",
7982 if (flag_pedantic_errors)
7987 /* Discard the type modifiers if they are invalid. */
7998 /* Decide whether an integer type is signed or not.
7999 Optionally treat bitfields as signed by default. */
8003 It is implementation-defined whether a plain (neither
8004 explicitly signed or unsigned) char, short, int, or long
8005 bit-field is signed or unsigned.
8007 Naturally, we extend this to long long as well. Note that
8008 this does not include wchar_t. */
8009 || (bitfield && !flag_signed_bitfields
8011 /* A typedef for plain `int' without `signed' can be
8012 controlled just like plain `int', but a typedef for
8013 `signed int' cannot be so controlled. */
8015 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8016 && TREE_CODE (type) == INTEGER_TYPE
8017 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8020 type = long_long_unsigned_type_node;
8022 type = long_unsigned_type_node;
8024 type = short_unsigned_type_node;
8025 else if (type == char_type_node)
8026 type = unsigned_char_type_node;
8027 else if (typedef_decl)
8028 type = unsigned_type_for (type);
8030 type = unsigned_type_node;
8032 else if (signed_p && type == char_type_node)
8033 type = signed_char_type_node;
8035 type = long_long_integer_type_node;
8037 type = long_integer_type_node;
8039 type = short_integer_type_node;
8041 if (declspecs->specs[(int)ds_complex])
8043 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8044 error ("complex invalid for %qs", name);
8045 /* If we just have "complex", it is equivalent to
8046 "complex double", but if any modifiers at all are specified it is
8047 the complex form of TYPE. E.g, "complex short" is
8048 "complex short int". */
8050 else if (defaulted_int && ! longlong
8051 && ! (long_p || short_p || signed_p || unsigned_p))
8052 type = complex_double_type_node;
8053 else if (type == integer_type_node)
8054 type = complex_integer_type_node;
8055 else if (type == float_type_node)
8056 type = complex_float_type_node;
8057 else if (type == double_type_node)
8058 type = complex_double_type_node;
8059 else if (type == long_double_type_node)
8060 type = complex_long_double_type_node;
8062 type = build_complex_type (type);
8065 type_quals = TYPE_UNQUALIFIED;
8066 if (declspecs->specs[(int)ds_const])
8067 type_quals |= TYPE_QUAL_CONST;
8068 if (declspecs->specs[(int)ds_volatile])
8069 type_quals |= TYPE_QUAL_VOLATILE;
8070 if (declspecs->specs[(int)ds_restrict])
8071 type_quals |= TYPE_QUAL_RESTRICT;
8072 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8073 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8076 if (TREE_CODE (type) == FUNCTION_TYPE
8077 && type_quals != TYPE_UNQUALIFIED)
8079 /* This was an error in C++98 (cv-qualifiers cannot be added to
8080 a function type), but DR 295 makes the code well-formed by
8081 dropping the extra qualifiers. */
8084 tree bad_type = build_qualified_type (type, type_quals);
8085 pedwarn (input_location, OPT_pedantic,
8086 "ignoring %qV qualifiers added to function type %qT",
8089 type_quals = TYPE_UNQUALIFIED;
8091 type_quals |= cp_type_quals (type);
8092 type = cp_build_qualified_type_real
8093 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8094 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8095 /* We might have ignored or rejected some of the qualifiers. */
8096 type_quals = cp_type_quals (type);
8099 inlinep = !! declspecs->specs[(int)ds_inline];
8100 virtualp = !! declspecs->specs[(int)ds_virtual];
8101 explicitp = !! declspecs->specs[(int)ds_explicit];
8103 storage_class = declspecs->storage_class;
8104 if (storage_class == sc_static)
8105 staticp = 1 + (decl_context == FIELD);
8107 if (virtualp && staticp == 2)
8109 error ("member %qD cannot be declared both virtual and static", dname);
8110 storage_class = sc_none;
8113 friendp = !! declspecs->specs[(int)ds_friend];
8115 if (dependent_name && !friendp)
8117 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8118 return error_mark_node;
8121 /* Issue errors about use of storage classes for parameters. */
8122 if (decl_context == PARM)
8124 if (declspecs->specs[(int)ds_typedef])
8126 error ("typedef declaration invalid in parameter declaration");
8127 return error_mark_node;
8129 else if (storage_class == sc_static
8130 || storage_class == sc_extern
8132 error ("storage class specifiers invalid in parameter declarations");
8134 if (type_uses_auto (type))
8136 error ("parameter declared %<auto%>");
8137 type = error_mark_node;
8141 /* Give error if `virtual' is used outside of class declaration. */
8143 && (current_class_name == NULL_TREE || decl_context != FIELD))
8145 error ("%<virtual%> outside class declaration");
8149 /* Static anonymous unions are dealt with here. */
8150 if (staticp && decl_context == TYPENAME
8152 && ANON_AGGR_TYPE_P (declspecs->type))
8153 decl_context = FIELD;
8155 /* Warn about storage classes that are invalid for certain
8156 kinds of declarations (parameters, typenames, etc.). */
8159 && storage_class != sc_extern
8160 && storage_class != sc_static)
8161 || declspecs->specs[(int)ds_typedef]))
8163 error ("multiple storage classes in declaration of %qs", name);
8166 if (decl_context != NORMAL
8167 && ((storage_class != sc_none
8168 && storage_class != sc_mutable)
8171 if ((decl_context == PARM || decl_context == CATCHPARM)
8172 && (storage_class == sc_register
8173 || storage_class == sc_auto))
8175 else if (declspecs->specs[(int)ds_typedef])
8177 else if (decl_context == FIELD
8178 /* C++ allows static class elements. */
8179 && storage_class == sc_static)
8180 /* C++ also allows inlines and signed and unsigned elements,
8181 but in those cases we don't come in here. */
8185 if (decl_context == FIELD)
8186 error ("storage class specified for %qs", name);
8189 if (decl_context == PARM || decl_context == CATCHPARM)
8190 error ("storage class specified for parameter %qs", name);
8192 error ("storage class specified for typename");
8194 if (storage_class == sc_register
8195 || storage_class == sc_auto
8196 || storage_class == sc_extern
8198 storage_class = sc_none;
8201 else if (storage_class == sc_extern && funcdef_flag
8202 && ! toplevel_bindings_p ())
8203 error ("nested function %qs declared %<extern%>", name);
8204 else if (toplevel_bindings_p ())
8206 if (storage_class == sc_auto)
8207 error ("top-level declaration of %qs specifies %<auto%>", name);
8210 && storage_class != sc_extern
8211 && storage_class != sc_static)
8213 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8218 if (storage_class && friendp)
8220 error ("storage class specifiers invalid in friend function declarations");
8221 storage_class = sc_none;
8226 unqualified_id = NULL_TREE;
8229 unqualified_id = id_declarator->u.id.unqualified_name;
8230 switch (TREE_CODE (unqualified_id))
8233 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8234 if (TYPE_P (unqualified_id))
8235 unqualified_id = constructor_name (unqualified_id);
8238 case IDENTIFIER_NODE:
8239 case TEMPLATE_ID_EXPR:
8247 /* Determine the type of the entity declared by recurring on the
8249 for (; declarator; declarator = declarator->declarator)
8251 const cp_declarator *inner_declarator;
8254 if (type == error_mark_node)
8255 return error_mark_node;
8257 attrs = declarator->attributes;
8263 if (declarator == NULL || declarator->kind == cdk_id)
8264 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8265 if (declarator->kind == cdk_function)
8266 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8267 if (declarator->kind == cdk_array)
8268 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8269 returned_attrs = decl_attributes (&type,
8270 chainon (returned_attrs, attrs),
8274 if (declarator->kind == cdk_id)
8277 inner_declarator = declarator->declarator;
8279 switch (declarator->kind)
8282 type = create_array_type_for_decl (dname, type,
8283 declarator->u.array.bounds);
8291 /* Declaring a function type.
8292 Make sure we have a valid type for the function to return. */
8294 if (type_quals != TYPE_UNQUALIFIED)
8296 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8297 warning (OPT_Wignored_qualifiers,
8298 "type qualifiers ignored on function return type");
8299 /* We now know that the TYPE_QUALS don't apply to the
8300 decl, but to its return type. */
8301 type_quals = TYPE_UNQUALIFIED;
8304 /* Error about some types functions can't return. */
8306 if (TREE_CODE (type) == FUNCTION_TYPE)
8308 error ("%qs declared as function returning a function", name);
8309 return error_mark_node;
8311 if (TREE_CODE (type) == ARRAY_TYPE)
8313 error ("%qs declared as function returning an array", name);
8314 return error_mark_node;
8317 /* Pick up type qualifiers which should be applied to `this'. */
8318 memfn_quals = declarator->u.function.qualifiers;
8320 /* Pick up the exception specifications. */
8321 raises = declarator->u.function.exception_specification;
8323 /* Say it's a definition only for the CALL_EXPR
8324 closest to the identifier. */
8325 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8327 /* Handle a late-specified return type. */
8330 if (type_uses_auto (type))
8332 if (!declarator->u.function.late_return_type)
8334 error ("%qs function uses %<auto%> type specifier without"
8335 " late return type", name);
8336 return error_mark_node;
8338 else if (!is_auto (type))
8340 error ("%qs function with late return type has"
8341 " %qT as its type rather than plain %<auto%>",
8343 return error_mark_node;
8346 else if (declarator->u.function.late_return_type)
8348 error ("%qs function with late return type not declared"
8349 " with %<auto%> type specifier", name);
8350 return error_mark_node;
8353 type = splice_late_return_type
8354 (type, declarator->u.function.late_return_type);
8355 if (type == error_mark_node)
8356 return error_mark_node;
8358 if (ctype == NULL_TREE
8359 && decl_context == FIELD
8361 && (friendp == 0 || dname == current_class_name))
8362 ctype = current_class_type;
8364 if (ctype && (sfk == sfk_constructor
8365 || sfk == sfk_destructor))
8367 /* We are within a class's scope. If our declarator name
8368 is the same as the class name, and we are defining
8369 a function, then it is a constructor/destructor, and
8370 therefore returns a void type. */
8372 /* ISO C++ 12.4/2. A destructor may not be declared
8373 const or volatile. A destructor may not be
8376 ISO C++ 12.1. A constructor may not be declared
8377 const or volatile. A constructor may not be
8378 virtual. A constructor may not be static. */
8380 error ((flags == DTOR_FLAG)
8381 ? "destructor cannot be static member function"
8382 : "constructor cannot be static member function");
8385 error ((flags == DTOR_FLAG)
8386 ? "destructors may not be cv-qualified"
8387 : "constructors may not be cv-qualified");
8388 memfn_quals = TYPE_UNQUALIFIED;
8391 if (decl_context == FIELD
8392 && !member_function_or_else (ctype,
8395 return error_mark_node;
8397 if (flags != DTOR_FLAG)
8399 /* It's a constructor. */
8404 permerror (input_location, "constructors cannot be declared virtual");
8407 if (decl_context == FIELD
8408 && sfk != sfk_constructor)
8409 return error_mark_node;
8411 if (decl_context == FIELD)
8417 error ("can't initialize friend function %qs", name);
8420 /* Cannot be both friend and virtual. */
8421 error ("virtual functions cannot be friends");
8424 if (decl_context == NORMAL)
8425 error ("friend declaration not in class definition");
8426 if (current_function_decl && funcdef_flag)
8427 error ("can't define friend function %qs in a local "
8432 arg_types = grokparms (declarator->u.function.parameters,
8435 if (inner_declarator
8436 && inner_declarator->kind == cdk_id
8437 && inner_declarator->u.id.sfk == sfk_destructor
8438 && arg_types != void_list_node)
8440 error ("destructors may not have parameters");
8441 arg_types = void_list_node;
8445 type = build_function_type (type, arg_types);
8452 /* Filter out pointers-to-references and references-to-references.
8453 We can get these if a TYPE_DECL is used. */
8455 if (TREE_CODE (type) == REFERENCE_TYPE)
8457 if (declarator->kind != cdk_reference)
8459 error ("cannot declare pointer to %q#T", type);
8460 type = TREE_TYPE (type);
8463 /* In C++0x, we allow reference to reference declarations
8464 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8465 and template type arguments [14.3.1/4 temp.arg.type]. The
8466 check for direct reference to reference declarations, which
8467 are still forbidden, occurs below. Reasoning behind the change
8468 can be found in DR106, DR540, and the rvalue reference
8470 else if (cxx_dialect == cxx98)
8472 error ("cannot declare reference to %q#T", type);
8473 type = TREE_TYPE (type);
8476 else if (VOID_TYPE_P (type))
8478 if (declarator->kind == cdk_reference)
8479 error ("cannot declare reference to %q#T", type);
8480 else if (declarator->kind == cdk_ptrmem)
8481 error ("cannot declare pointer to %q#T member", type);
8484 /* We now know that the TYPE_QUALS don't apply to the decl,
8485 but to the target of the pointer. */
8486 type_quals = TYPE_UNQUALIFIED;
8488 if (declarator->kind == cdk_ptrmem
8489 && (TREE_CODE (type) == FUNCTION_TYPE
8490 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8492 memfn_quals |= cp_type_quals (type);
8493 type = build_memfn_type (type,
8494 declarator->u.pointer.class_type,
8496 memfn_quals = TYPE_UNQUALIFIED;
8499 if (TREE_CODE (type) == FUNCTION_TYPE
8500 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8501 error ("cannot declare %s to qualified function type %qT",
8502 declarator->kind == cdk_reference ? "reference" : "pointer",
8505 /* When the pointed-to type involves components of variable size,
8506 care must be taken to ensure that the size evaluation code is
8507 emitted early enough to dominate all the possible later uses
8508 and late enough for the variables on which it depends to have
8511 This is expected to happen automatically when the pointed-to
8512 type has a name/declaration of it's own, but special attention
8513 is required if the type is anonymous.
8515 We handle the NORMAL and FIELD contexts here by inserting a
8516 dummy statement that just evaluates the size at a safe point
8517 and ensures it is not deferred until e.g. within a deeper
8518 conditional context (c++/43555).
8520 We expect nothing to be needed here for PARM or TYPENAME.
8521 Evaluating the size at this point for TYPENAME would
8522 actually be incorrect, as we might be in the middle of an
8523 expression with side effects on the pointed-to type size
8524 "arguments" prior to the pointer declaration point and the
8525 size evaluation could end up prior to the side effects. */
8527 if (!TYPE_NAME (type)
8528 && (decl_context == NORMAL || decl_context == FIELD)
8529 && at_function_scope_p ()
8530 && variably_modified_type_p (type, NULL_TREE))
8531 finish_expr_stmt (TYPE_SIZE (type));
8533 if (declarator->kind == cdk_reference)
8535 /* In C++0x, the type we are creating a reference to might be
8536 a typedef which is itself a reference type. In that case,
8537 we follow the reference collapsing rules in
8538 [7.1.3/8 dcl.typedef] to create the final reference type:
8540 "If a typedef TD names a type that is a reference to a type
8541 T, an attempt to create the type 'lvalue reference to cv TD'
8542 creates the type 'lvalue reference to T,' while an attempt
8543 to create the type "rvalue reference to cv TD' creates the
8546 if (!VOID_TYPE_P (type))
8547 type = cp_build_reference_type
8548 ((TREE_CODE (type) == REFERENCE_TYPE
8549 ? TREE_TYPE (type) : type),
8550 (declarator->u.reference.rvalue_ref
8551 && (TREE_CODE(type) != REFERENCE_TYPE
8552 || TYPE_REF_IS_RVALUE (type))));
8554 /* In C++0x, we need this check for direct reference to
8555 reference declarations, which are forbidden by
8556 [8.3.2/5 dcl.ref]. Reference to reference declarations
8557 are only allowed indirectly through typedefs and template
8558 type arguments. Example:
8560 void foo(int & &); // invalid ref-to-ref decl
8562 typedef int & int_ref;
8563 void foo(int_ref &); // valid ref-to-ref decl
8565 if (inner_declarator && inner_declarator->kind == cdk_reference)
8566 error ("cannot declare reference to %q#T, which is not "
8567 "a typedef or a template type argument", type);
8569 else if (TREE_CODE (type) == METHOD_TYPE)
8570 type = build_ptrmemfunc_type (build_pointer_type (type));
8571 else if (declarator->kind == cdk_ptrmem)
8573 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8575 if (declarator->u.pointer.class_type == error_mark_node)
8576 /* We will already have complained. */
8577 type = error_mark_node;
8579 type = build_ptrmem_type (declarator->u.pointer.class_type,
8583 type = build_pointer_type (type);
8585 /* Process a list of type modifier keywords (such as
8586 const or volatile) that were given inside the `*' or `&'. */
8588 if (declarator->u.pointer.qualifiers)
8591 = cp_build_qualified_type (type,
8592 declarator->u.pointer.qualifiers);
8593 type_quals = cp_type_quals (type);
8606 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8607 && TREE_CODE (type) != FUNCTION_TYPE
8608 && TREE_CODE (type) != METHOD_TYPE)
8610 error ("template-id %qD used as a declarator",
8612 unqualified_id = dname;
8615 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8616 qualified with a class-name, turn it into a METHOD_TYPE, unless
8617 we know that the function is static. We take advantage of this
8618 opportunity to do other processing that pertains to entities
8619 explicitly declared to be class members. Note that if DECLARATOR
8620 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8621 would not have exited the loop above. */
8623 && declarator->u.id.qualifying_scope
8624 && TYPE_P (declarator->u.id.qualifying_scope))
8628 ctype = declarator->u.id.qualifying_scope;
8629 ctype = TYPE_MAIN_VARIANT (ctype);
8631 while (t != NULL_TREE && CLASS_TYPE_P (t))
8633 /* You're supposed to have one `template <...>' for every
8634 template class, but you don't need one for a full
8635 specialization. For example:
8637 template <class T> struct S{};
8638 template <> struct S<int> { void f(); };
8639 void S<int>::f () {}
8641 is correct; there shouldn't be a `template <>' for the
8642 definition of `S<int>::f'. */
8643 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8644 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8645 /* T is an explicit (not partial) specialization. All
8646 containing classes must therefore also be explicitly
8649 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8650 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8651 template_count += 1;
8653 t = TYPE_MAIN_DECL (t);
8654 t = DECL_CONTEXT (t);
8657 if (ctype == current_class_type)
8661 permerror (input_location, "member functions are implicitly friends of their class");
8665 permerror (declarator->id_loc,
8666 "extra qualification %<%T::%> on member %qs",
8669 else if (/* If the qualifying type is already complete, then we
8670 can skip the following checks. */
8671 !COMPLETE_TYPE_P (ctype)
8672 && (/* If the function is being defined, then
8673 qualifying type must certainly be complete. */
8675 /* A friend declaration of "T::f" is OK, even if
8676 "T" is a template parameter. But, if this
8677 function is not a friend, the qualifying type
8679 || (!friendp && !CLASS_TYPE_P (ctype))
8680 /* For a declaration, the type need not be
8681 complete, if either it is dependent (since there
8682 is no meaningful definition of complete in that
8683 case) or the qualifying class is currently being
8685 || !(dependent_type_p (ctype)
8686 || currently_open_class (ctype)))
8687 /* Check that the qualifying type is complete. */
8688 && !complete_type_or_else (ctype, NULL_TREE))
8689 return error_mark_node;
8690 else if (TREE_CODE (type) == FUNCTION_TYPE)
8692 tree sname = declarator->u.id.unqualified_name;
8694 if (current_class_type
8695 && (!friendp || funcdef_flag))
8698 ? "cannot define member function %<%T::%s%> within %<%T%>"
8699 : "cannot declare member function %<%T::%s%> within %<%T%>",
8700 ctype, name, current_class_type);
8701 return error_mark_node;
8704 if (TREE_CODE (sname) == IDENTIFIER_NODE
8705 && NEW_DELETE_OPNAME_P (sname))
8706 /* Overloaded operator new and operator delete
8707 are always static functions. */
8710 type = build_memfn_type (type, ctype, memfn_quals);
8712 else if (declspecs->specs[(int)ds_typedef]
8713 && current_class_type)
8715 error ("cannot declare member %<%T::%s%> within %qT",
8716 ctype, name, current_class_type);
8717 return error_mark_node;
8721 /* Now TYPE has the actual type. */
8726 *attrlist = chainon (returned_attrs, *attrlist);
8728 attrlist = &returned_attrs;
8731 /* Handle parameter packs. */
8732 if (parameter_pack_p)
8734 if (decl_context == PARM)
8735 /* Turn the type into a pack expansion.*/
8736 type = make_pack_expansion (type);
8738 error ("non-parameter %qs cannot be a parameter pack", name);
8741 /* Did array size calculations overflow? */
8743 if (TREE_CODE (type) == ARRAY_TYPE
8744 && COMPLETE_TYPE_P (type)
8745 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8746 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8748 error ("size of array %qs is too large", name);
8749 /* If we proceed with the array type as it is, we'll eventually
8750 crash in tree_low_cst(). */
8751 type = error_mark_node;
8754 if ((decl_context == FIELD || decl_context == PARM)
8755 && !processing_template_decl
8756 && variably_modified_type_p (type, NULL_TREE))
8758 if (decl_context == FIELD)
8759 error ("data member may not have variably modified type %qT", type);
8761 error ("parameter may not have variably modified type %qT", type);
8762 type = error_mark_node;
8765 if (explicitp == 1 || (explicitp && friendp))
8767 /* [dcl.fct.spec] The explicit specifier shall only be used in
8768 declarations of constructors within a class definition. */
8769 error ("only declarations of constructors can be %<explicit%>");
8773 if (storage_class == sc_mutable)
8775 if (decl_context != FIELD || friendp)
8777 error ("non-member %qs cannot be declared %<mutable%>", name);
8778 storage_class = sc_none;
8780 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8782 error ("non-object member %qs cannot be declared %<mutable%>", name);
8783 storage_class = sc_none;
8785 else if (TREE_CODE (type) == FUNCTION_TYPE
8786 || TREE_CODE (type) == METHOD_TYPE)
8788 error ("function %qs cannot be declared %<mutable%>", name);
8789 storage_class = sc_none;
8793 error ("static %qs cannot be declared %<mutable%>", name);
8794 storage_class = sc_none;
8796 else if (type_quals & TYPE_QUAL_CONST)
8798 error ("const %qs cannot be declared %<mutable%>", name);
8799 storage_class = sc_none;
8803 /* If this is declaring a typedef name, return a TYPE_DECL. */
8804 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8808 /* Note that the grammar rejects storage classes
8809 in typenames, fields or parameters. */
8810 if (current_lang_name == lang_name_java)
8811 TYPE_FOR_JAVA (type) = 1;
8813 /* This declaration:
8815 typedef void f(int) const;
8817 declares a function type which is not a member of any
8818 particular class, but which is cv-qualified; for
8819 example "f S::*" declares a pointer to a const-qualified
8820 member function of S. We record the cv-qualification in the
8822 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8824 type = cp_build_qualified_type (type, memfn_quals);
8826 /* We have now dealt with these qualifiers. */
8827 memfn_quals = TYPE_UNQUALIFIED;
8830 if (decl_context == FIELD)
8831 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8833 decl = build_decl (TYPE_DECL, unqualified_id, type);
8834 if (id_declarator && declarator->u.id.qualifying_scope) {
8835 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8836 TREE_TYPE (decl) = error_mark_node;
8839 if (decl_context != FIELD)
8841 if (!current_function_decl)
8842 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8843 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8844 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8845 (current_function_decl)))
8846 /* The TYPE_DECL is "abstract" because there will be
8847 clones of this constructor/destructor, and there will
8848 be copies of this TYPE_DECL generated in those
8850 DECL_ABSTRACT (decl) = 1;
8852 else if (constructor_name_p (unqualified_id, current_class_type))
8853 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8854 "as enclosing class",
8857 /* If the user declares "typedef struct {...} foo" then the
8858 struct will have an anonymous name. Fill that name in now.
8859 Nothing can refer to it, so nothing needs know about the name
8861 if (type != error_mark_node
8864 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8865 && TYPE_ANONYMOUS_P (type)
8866 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8868 tree oldname = TYPE_NAME (type);
8871 /* Replace the anonymous name with the real name everywhere. */
8872 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8873 if (TYPE_NAME (t) == oldname)
8874 TYPE_NAME (t) = decl;
8876 if (TYPE_LANG_SPECIFIC (type))
8877 TYPE_WAS_ANONYMOUS (type) = 1;
8879 /* If this is a typedef within a template class, the nested
8880 type is a (non-primary) template. The name for the
8881 template needs updating as well. */
8882 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8883 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8884 = TYPE_IDENTIFIER (type);
8886 /* FIXME remangle member functions; member functions of a
8887 type with external linkage have external linkage. */
8891 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8892 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8894 bad_specifiers (decl, "type", virtualp,
8895 memfn_quals != TYPE_UNQUALIFIED,
8896 inlinep, friendp, raises != NULL_TREE);
8901 /* Detect the case of an array type of unspecified size
8902 which came, as such, direct from a typedef name.
8903 We must copy the type, so that the array's domain can be
8904 individually set by the object's initializer. */
8906 if (type && typedef_type
8907 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8908 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8909 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8911 /* Detect where we're using a typedef of function type to declare a
8912 function. PARMS will not be set, so we must create it now. */
8914 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8916 tree decls = NULL_TREE;
8919 for (args = TYPE_ARG_TYPES (type);
8920 args && args != void_list_node;
8921 args = TREE_CHAIN (args))
8923 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8925 TREE_CHAIN (decl) = decls;
8929 parms = nreverse (decls);
8931 if (decl_context != TYPENAME)
8933 /* A cv-qualifier-seq shall only be part of the function type
8934 for a non-static member function. [8.3.5/4 dcl.fct] */
8935 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8936 && (current_class_type == NULL_TREE || staticp) )
8939 ? G_("qualified function types cannot be used to "
8940 "declare static member functions")
8941 : G_("qualified function types cannot be used to "
8942 "declare free functions"));
8943 type = TYPE_MAIN_VARIANT (type);
8946 /* The qualifiers on the function type become the qualifiers on
8947 the non-static member function. */
8948 memfn_quals |= cp_type_quals (type);
8952 /* If this is a type name (such as, in a cast or sizeof),
8953 compute the type and return it now. */
8955 if (decl_context == TYPENAME)
8957 /* Note that the grammar rejects storage classes
8958 in typenames, fields or parameters. */
8959 if (type_quals != TYPE_UNQUALIFIED)
8960 type_quals = TYPE_UNQUALIFIED;
8962 /* Special case: "friend class foo" looks like a TYPENAME context. */
8965 if (type_quals != TYPE_UNQUALIFIED)
8967 error ("type qualifiers specified for friend class declaration");
8968 type_quals = TYPE_UNQUALIFIED;
8972 error ("%<inline%> specified for friend class declaration");
8978 /* Don't allow friend declaration without a class-key. */
8979 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8980 permerror (input_location, "template parameters cannot be friends");
8981 else if (TREE_CODE (type) == TYPENAME_TYPE)
8982 permerror (input_location, "friend declaration requires class-key, "
8983 "i.e. %<friend class %T::%D%>",
8984 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8986 permerror (input_location, "friend declaration requires class-key, "
8987 "i.e. %<friend %#T%>",
8991 /* Only try to do this stuff if we didn't already give up. */
8992 if (type != integer_type_node)
8994 /* A friendly class? */
8995 if (current_class_type)
8996 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8999 error ("trying to make class %qT a friend of global scope",
9002 type = void_type_node;
9005 else if (memfn_quals)
9007 if (ctype == NULL_TREE
9008 && TREE_CODE (type) == METHOD_TYPE)
9009 ctype = TYPE_METHOD_BASETYPE (type);
9012 type = build_memfn_type (type, ctype, memfn_quals);
9013 /* Core issue #547: need to allow this in template type args. */
9014 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9015 type = cp_build_qualified_type (type, memfn_quals);
9017 error ("invalid qualifiers on non-member function type");
9022 else if (unqualified_id == NULL_TREE && decl_context != PARM
9023 && decl_context != CATCHPARM
9024 && TREE_CODE (type) != UNION_TYPE
9027 error ("abstract declarator %qT used as declaration", type);
9028 return error_mark_node;
9031 /* Only functions may be declared using an operator-function-id. */
9033 && IDENTIFIER_OPNAME_P (unqualified_id)
9034 && TREE_CODE (type) != FUNCTION_TYPE
9035 && TREE_CODE (type) != METHOD_TYPE)
9037 error ("declaration of %qD as non-function", unqualified_id);
9038 return error_mark_node;
9041 /* We don't check parameter types here because we can emit a better
9042 error message later. */
9043 if (decl_context != PARM)
9045 type = check_var_type (unqualified_id, type);
9046 if (type == error_mark_node)
9047 return error_mark_node;
9050 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9051 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9053 if (decl_context == PARM || decl_context == CATCHPARM)
9055 if (ctype || in_namespace)
9056 error ("cannot use %<::%> in parameter declaration");
9058 /* A parameter declared as an array of T is really a pointer to T.
9059 One declared as a function is really a pointer to a function.
9060 One declared as a member is really a pointer to member. */
9062 if (TREE_CODE (type) == ARRAY_TYPE)
9064 /* Transfer const-ness of array into that of type pointed to. */
9065 type = build_pointer_type (TREE_TYPE (type));
9066 type_quals = TYPE_UNQUALIFIED;
9068 else if (TREE_CODE (type) == FUNCTION_TYPE)
9069 type = build_pointer_type (type);
9075 if (decl_context == PARM)
9077 decl = cp_build_parm_decl (unqualified_id, type);
9079 bad_specifiers (decl, "parameter", virtualp,
9080 memfn_quals != TYPE_UNQUALIFIED,
9081 inlinep, friendp, raises != NULL_TREE);
9083 else if (decl_context == FIELD)
9085 /* The C99 flexible array extension. */
9086 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9087 && TYPE_DOMAIN (type) == NULL_TREE)
9089 tree itype = compute_array_index_type (dname, integer_zero_node);
9090 type = build_cplus_array_type (TREE_TYPE (type), itype);
9093 if (type == error_mark_node)
9095 /* Happens when declaring arrays of sizes which
9096 are error_mark_node, for example. */
9099 else if (in_namespace && !friendp)
9101 /* Something like struct S { int N::j; }; */
9102 error ("invalid use of %<::%>");
9103 return error_mark_node;
9105 else if (TREE_CODE (type) == FUNCTION_TYPE)
9108 tree function_context;
9112 if (ctype == NULL_TREE)
9113 ctype = current_class_type;
9115 if (ctype == NULL_TREE)
9117 error ("can't make %qD into a method -- not in a class",
9119 return error_mark_node;
9122 /* ``A union may [ ... ] not [ have ] virtual functions.''
9124 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9126 error ("function %qD declared virtual inside a union",
9128 return error_mark_node;
9131 if (NEW_DELETE_OPNAME_P (unqualified_id))
9135 error ("%qD cannot be declared virtual, since it "
9141 else if (staticp < 2)
9142 type = build_memfn_type (type, ctype, memfn_quals);
9145 /* Check that the name used for a destructor makes sense. */
9146 if (sfk == sfk_destructor)
9148 tree uqname = id_declarator->u.id.unqualified_name;
9152 gcc_assert (friendp);
9153 error ("expected qualified name in friend declaration "
9154 "for destructor %qD", uqname);
9155 return error_mark_node;
9158 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9160 error ("declaration of %qD as member of %qT",
9162 return error_mark_node;
9165 else if (sfk == sfk_constructor && friendp)
9167 error ("expected qualified name in friend declaration "
9168 "for constructor %qD",
9169 id_declarator->u.id.unqualified_name);
9170 return error_mark_node;
9173 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9174 function_context = (ctype != NULL_TREE) ?
9175 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9176 publicp = (! friendp || ! staticp)
9177 && function_context == NULL_TREE;
9178 decl = grokfndecl (ctype, type,
9179 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9180 ? unqualified_id : dname,
9183 virtualp, flags, memfn_quals, raises,
9184 friendp ? -1 : 0, friendp, publicp, inlinep,
9186 funcdef_flag, template_count, in_namespace,
9187 attrlist, declarator->id_loc);
9188 if (decl == NULL_TREE)
9189 return error_mark_node;
9191 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9192 /* The decl and setting of decl_attr is also turned off. */
9193 decl = build_decl_attribute_variant (decl, decl_attr);
9196 /* [class.conv.ctor]
9198 A constructor declared without the function-specifier
9199 explicit that can be called with a single parameter
9200 specifies a conversion from the type of its first
9201 parameter to the type of its class. Such a constructor
9202 is called a converting constructor. */
9204 DECL_NONCONVERTING_P (decl) = 1;
9206 else if (TREE_CODE (type) == METHOD_TYPE)
9208 /* We only get here for friend declarations of
9209 members of other classes. */
9210 /* All method decls are public, so tell grokfndecl to set
9211 TREE_PUBLIC, also. */
9212 decl = grokfndecl (ctype, type,
9213 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9214 ? unqualified_id : dname,
9217 virtualp, flags, memfn_quals, raises,
9218 friendp ? -1 : 0, friendp, 1, 0, sfk,
9219 funcdef_flag, template_count, in_namespace,
9221 declarator->id_loc);
9222 if (decl == NULL_TREE)
9223 return error_mark_node;
9225 else if (!staticp && !dependent_type_p (type)
9226 && !COMPLETE_TYPE_P (complete_type (type))
9227 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9230 error ("field %qD has incomplete type", unqualified_id);
9232 error ("name %qT has incomplete type", type);
9234 /* If we're instantiating a template, tell them which
9235 instantiation made the field's type be incomplete. */
9236 if (current_class_type
9237 && TYPE_NAME (current_class_type)
9238 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9240 && declspecs->type == type)
9241 error (" in instantiation of template %qT",
9242 current_class_type);
9244 return error_mark_node;
9250 error ("%qE is neither function nor member function; "
9251 "cannot be declared friend", unqualified_id);
9259 /* Friends are treated specially. */
9260 if (ctype == current_class_type)
9261 ; /* We already issued a permerror. */
9262 else if (decl && DECL_NAME (decl))
9264 if (template_class_depth (current_class_type) == 0)
9266 decl = check_explicit_specialization
9267 (unqualified_id, decl, template_count,
9268 2 * funcdef_flag + 4);
9269 if (decl == error_mark_node)
9270 return error_mark_node;
9273 decl = do_friend (ctype, unqualified_id, decl,
9279 return error_mark_node;
9282 /* Structure field. It may not be a function, except for C++. */
9284 if (decl == NULL_TREE)
9290 /* An attempt is being made to initialize a non-static
9291 member. But, from [class.mem]:
9293 4 A member-declarator can contain a
9294 constant-initializer only if it declares a static
9295 member (_class.static_) of integral or enumeration
9296 type, see _class.static.data_.
9298 This used to be relatively common practice, but
9299 the rest of the compiler does not correctly
9300 handle the initialization unless the member is
9301 static so we make it static below. */
9302 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9304 permerror (input_location, "making %qD static", unqualified_id);
9308 if (uses_template_parms (type))
9309 /* We'll check at instantiation time. */
9311 else if (check_static_variable_definition (unqualified_id,
9313 /* If we just return the declaration, crashes
9314 will sometimes occur. We therefore return
9315 void_type_node, as if this was a friend
9316 declaration, to cause callers to completely
9317 ignore this declaration. */
9318 return error_mark_node;
9323 /* C++ allows static class members. All other work
9324 for this is done by grokfield. */
9325 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9326 set_linkage_for_static_data_member (decl);
9327 /* Even if there is an in-class initialization, DECL
9328 is considered undefined until an out-of-class
9329 definition is provided. */
9330 DECL_EXTERNAL (decl) = 1;
9333 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9337 decl = build_decl (FIELD_DECL, unqualified_id, type);
9338 DECL_NONADDRESSABLE_P (decl) = bitfield;
9339 if (bitfield && !unqualified_id)
9340 TREE_NO_WARNING (decl) = 1;
9342 if (storage_class == sc_mutable)
9344 DECL_MUTABLE_P (decl) = 1;
9345 storage_class = sc_none;
9349 bad_specifiers (decl, "field", virtualp,
9350 memfn_quals != TYPE_UNQUALIFIED,
9351 inlinep, friendp, raises != NULL_TREE);
9354 else if (TREE_CODE (type) == FUNCTION_TYPE
9355 || TREE_CODE (type) == METHOD_TYPE)
9360 if (!unqualified_id)
9361 return error_mark_node;
9363 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9364 original_name = dname;
9366 original_name = unqualified_id;
9368 if (storage_class == sc_auto)
9369 error ("storage class %<auto%> invalid for function %qs", name);
9370 else if (storage_class == sc_register)
9371 error ("storage class %<register%> invalid for function %qs", name);
9373 error ("storage class %<__thread%> invalid for function %qs", name);
9375 /* Function declaration not at top level.
9376 Storage classes other than `extern' are not allowed
9377 and `extern' makes no difference. */
9378 if (! toplevel_bindings_p ()
9379 && (storage_class == sc_static
9380 || declspecs->specs[(int)ds_inline])
9383 if (storage_class == sc_static)
9384 pedwarn (input_location, OPT_pedantic,
9385 "%<static%> specified invalid for function %qs "
9386 "declared out of global scope", name);
9388 pedwarn (input_location, OPT_pedantic,
9389 "%<inline%> specifier invalid for function %qs "
9390 "declared out of global scope", name);
9393 if (ctype != NULL_TREE
9394 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9396 error ("%q#T is not a class or a namespace", ctype);
9400 if (ctype == NULL_TREE)
9404 error ("virtual non-class function %qs", name);
9407 else if (sfk == sfk_constructor
9408 || sfk == sfk_destructor)
9411 ? "%qs defined in a non-class scope"
9412 : "%qs declared in a non-class scope", name);
9416 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9417 && !NEW_DELETE_OPNAME_P (original_name))
9418 type = build_method_type_directly (ctype,
9420 TYPE_ARG_TYPES (type));
9422 /* Record presence of `static'. */
9423 publicp = (ctype != NULL_TREE
9424 || storage_class == sc_extern
9425 || storage_class != sc_static);
9427 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9428 virtualp, flags, memfn_quals, raises,
9430 publicp, inlinep, sfk, funcdef_flag,
9431 template_count, in_namespace, attrlist,
9432 declarator->id_loc);
9433 if (decl == NULL_TREE)
9434 return error_mark_node;
9438 int invalid_static = 0;
9440 /* Don't allow a static member function in a class, and forbid
9441 declaring main to be static. */
9442 if (TREE_CODE (type) == METHOD_TYPE)
9444 permerror (input_location, "cannot declare member function %qD to have "
9445 "static linkage", decl);
9448 else if (current_function_decl)
9450 /* FIXME need arm citation */
9451 error ("cannot declare static function inside another function");
9458 storage_class = sc_none;
9464 /* It's a variable. */
9466 /* An uninitialized decl with `extern' is a reference. */
9467 decl = grokvardecl (type, unqualified_id,
9470 (type_quals & TYPE_QUAL_CONST) != 0,
9471 ctype ? ctype : in_namespace);
9472 bad_specifiers (decl, "variable", virtualp,
9473 memfn_quals != TYPE_UNQUALIFIED,
9474 inlinep, friendp, raises != NULL_TREE);
9478 DECL_CONTEXT (decl) = ctype;
9481 permerror (input_location, "%<static%> may not be used when defining "
9482 "(as opposed to declaring) a static data member");
9484 storage_class = sc_none;
9486 if (storage_class == sc_register && TREE_STATIC (decl))
9488 error ("static member %qD declared %<register%>", decl);
9489 storage_class = sc_none;
9491 if (storage_class == sc_extern && pedantic)
9493 pedwarn (input_location, OPT_pedantic,
9494 "cannot explicitly declare member %q#D to have "
9495 "extern linkage", decl);
9496 storage_class = sc_none;
9501 if (storage_class == sc_extern && initialized && !funcdef_flag)
9503 if (toplevel_bindings_p ())
9505 /* It's common practice (and completely valid) to have a const
9506 be initialized and declared extern. */
9507 if (!(type_quals & TYPE_QUAL_CONST))
9508 warning (0, "%qs initialized and declared %<extern%>", name);
9512 error ("%qs has both %<extern%> and initializer", name);
9513 return error_mark_node;
9517 /* Record `register' declaration for warnings on &
9518 and in case doing stupid register allocation. */
9520 if (storage_class == sc_register)
9521 DECL_REGISTER (decl) = 1;
9522 else if (storage_class == sc_extern)
9523 DECL_THIS_EXTERN (decl) = 1;
9524 else if (storage_class == sc_static)
9525 DECL_THIS_STATIC (decl) = 1;
9527 /* Record constancy and volatility on the DECL itself . There's
9528 no need to do this when processing a template; we'll do this
9529 for the instantiated declaration based on the type of DECL. */
9530 if (!processing_template_decl)
9531 cp_apply_type_quals_to_decl (type_quals, decl);
9537 /* Subroutine of start_function. Ensure that each of the parameter
9538 types (as listed in PARMS) is complete, as is required for a
9539 function definition. */
9542 require_complete_types_for_parms (tree parms)
9544 for (; parms; parms = TREE_CHAIN (parms))
9546 if (dependent_type_p (TREE_TYPE (parms)))
9548 if (!VOID_TYPE_P (TREE_TYPE (parms))
9549 && complete_type_or_else (TREE_TYPE (parms), parms))
9551 relayout_decl (parms);
9552 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9555 /* grokparms or complete_type_or_else will have already issued
9557 TREE_TYPE (parms) = error_mark_node;
9561 /* Returns nonzero if T is a local variable. */
9564 local_variable_p (const_tree t)
9566 if ((TREE_CODE (t) == VAR_DECL
9567 /* A VAR_DECL with a context that is a _TYPE is a static data
9569 && !TYPE_P (CP_DECL_CONTEXT (t))
9570 /* Any other non-local variable must be at namespace scope. */
9571 && !DECL_NAMESPACE_SCOPE_P (t))
9572 || (TREE_CODE (t) == PARM_DECL))
9578 /* Like local_variable_p, but suitable for use as a tree-walking
9582 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9583 void *data ATTRIBUTE_UNUSED)
9585 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9587 else if (TYPE_P (*tp))
9594 /* Check that ARG, which is a default-argument expression for a
9595 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9596 something goes wrong. DECL may also be a _TYPE node, rather than a
9597 DECL, if there is no DECL available. */
9600 check_default_argument (tree decl, tree arg)
9605 if (TREE_CODE (arg) == DEFAULT_ARG)
9606 /* We get a DEFAULT_ARG when looking at an in-class declaration
9607 with a default argument. Ignore the argument for now; we'll
9608 deal with it after the class is complete. */
9617 decl_type = TREE_TYPE (decl);
9619 if (arg == error_mark_node
9620 || decl == error_mark_node
9621 || TREE_TYPE (arg) == error_mark_node
9622 || decl_type == error_mark_node)
9623 /* Something already went wrong. There's no need to check
9625 return error_mark_node;
9627 /* [dcl.fct.default]
9629 A default argument expression is implicitly converted to the
9631 if (!TREE_TYPE (arg)
9632 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9635 error ("default argument for %q#D has type %qT",
9636 decl, TREE_TYPE (arg));
9638 error ("default argument for parameter of type %qT has type %qT",
9639 decl_type, TREE_TYPE (arg));
9641 return error_mark_node;
9644 /* [dcl.fct.default]
9646 Local variables shall not be used in default argument
9649 The keyword `this' shall not be used in a default argument of a
9651 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9654 error ("default argument %qE uses local variable %qD", arg, var);
9655 return error_mark_node;
9662 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9665 type_is_deprecated (tree type)
9667 enum tree_code code;
9668 if (TREE_DEPRECATED (type))
9670 if (TYPE_NAME (type)
9671 && TREE_DEPRECATED (TYPE_NAME (type)))
9674 code = TREE_CODE (type);
9676 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9677 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9678 || code == METHOD_TYPE || code == ARRAY_TYPE)
9679 return type_is_deprecated (TREE_TYPE (type));
9681 if (TYPE_PTRMEMFUNC_P (type))
9682 return type_is_deprecated
9683 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9688 /* Decode the list of parameter types for a function type.
9689 Given the list of things declared inside the parens,
9690 return a list of types.
9692 If this parameter does not end with an ellipsis, we append
9695 *PARMS is set to the chain of PARM_DECLs created. */
9698 grokparms (tree parmlist, tree *parms)
9700 tree result = NULL_TREE;
9701 tree decls = NULL_TREE;
9705 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9707 tree type = NULL_TREE;
9708 tree init = TREE_PURPOSE (parm);
9709 tree decl = TREE_VALUE (parm);
9711 if (parm == void_list_node)
9714 if (! decl || TREE_TYPE (decl) == error_mark_node)
9717 type = TREE_TYPE (decl);
9718 if (VOID_TYPE_P (type))
9720 if (same_type_p (type, void_type_node)
9721 && DECL_SELF_REFERENCE_P (type)
9722 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9723 /* this is a parmlist of `(void)', which is ok. */
9725 cxx_incomplete_type_error (decl, type);
9726 /* It's not a good idea to actually create parameters of
9727 type `void'; other parts of the compiler assume that a
9728 void type terminates the parameter list. */
9729 type = error_mark_node;
9730 TREE_TYPE (decl) = error_mark_node;
9733 if (type != error_mark_node
9734 && TYPE_FOR_JAVA (type)
9735 && MAYBE_CLASS_TYPE_P (type))
9737 error ("parameter %qD has Java class type", decl);
9738 type = error_mark_node;
9739 TREE_TYPE (decl) = error_mark_node;
9743 if (type != error_mark_node)
9745 if (deprecated_state != DEPRECATED_SUPPRESS)
9747 tree deptype = type_is_deprecated (type);
9749 warn_deprecated_use (deptype);
9752 /* Top-level qualifiers on the parameters are
9753 ignored for function types. */
9754 type = cp_build_qualified_type (type, 0);
9755 if (TREE_CODE (type) == METHOD_TYPE)
9757 error ("parameter %qD invalidly declared method type", decl);
9758 type = build_pointer_type (type);
9759 TREE_TYPE (decl) = type;
9761 else if (abstract_virtuals_error (decl, type))
9762 any_error = 1; /* Seems like a good idea. */
9763 else if (POINTER_TYPE_P (type))
9765 /* [dcl.fct]/6, parameter types cannot contain pointers
9766 (references) to arrays of unknown bound. */
9767 tree t = TREE_TYPE (type);
9768 int ptr = TYPE_PTR_P (type);
9774 else if (TREE_CODE (t) != ARRAY_TYPE)
9776 else if (!TYPE_DOMAIN (t))
9780 if (TREE_CODE (t) == ARRAY_TYPE)
9781 error ("parameter %qD includes %s to array of unknown "
9783 decl, ptr ? "pointer" : "reference", t);
9788 else if (init && !processing_template_decl)
9789 init = check_default_argument (decl, init);
9792 if (TREE_CODE (decl) == PARM_DECL
9793 && FUNCTION_PARAMETER_PACK_P (decl)
9794 && TREE_CHAIN (parm)
9795 && TREE_CHAIN (parm) != void_list_node)
9796 error ("parameter packs must be at the end of the parameter list");
9798 TREE_CHAIN (decl) = decls;
9800 result = tree_cons (init, type, result);
9802 decls = nreverse (decls);
9803 result = nreverse (result);
9805 result = chainon (result, void_list_node);
9812 /* D is a constructor or overloaded `operator='.
9814 Let T be the class in which D is declared. Then, this function
9817 -1 if D's is an ill-formed constructor or copy assignment operator
9818 whose first parameter is of type `T'.
9819 0 if D is not a copy constructor or copy assignment
9821 1 if D is a copy constructor or copy assignment operator whose
9822 first parameter is a reference to const qualified T.
9823 2 if D is a copy constructor or copy assignment operator whose
9824 first parameter is a reference to non-const qualified T.
9826 This function can be used as a predicate. Positive values indicate
9827 a copy constructor and nonzero values indicate a copy assignment
9831 copy_fn_p (const_tree d)
9837 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9839 if (TREE_CODE (d) == TEMPLATE_DECL
9840 || (DECL_TEMPLATE_INFO (d)
9841 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9842 /* Instantiations of template member functions are never copy
9843 functions. Note that member functions of templated classes are
9844 represented as template functions internally, and we must
9845 accept those as copy functions. */
9848 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9852 arg_type = TREE_VALUE (args);
9853 if (arg_type == error_mark_node)
9856 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9858 /* Pass by value copy assignment operator. */
9861 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9862 && !TYPE_REF_IS_RVALUE (arg_type)
9863 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9865 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9871 args = TREE_CHAIN (args);
9873 if (args && args != void_list_node && !TREE_PURPOSE (args))
9874 /* There are more non-optional args. */
9880 /* D is a constructor or overloaded `operator='.
9882 Let T be the class in which D is declared. Then, this function
9883 returns true when D is a move constructor or move assignment
9884 operator, false otherwise. */
9887 move_fn_p (const_tree d)
9891 bool result = false;
9893 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9895 if (cxx_dialect == cxx98)
9896 /* There are no move constructors if we are in C++98 mode. */
9899 if (TREE_CODE (d) == TEMPLATE_DECL
9900 || (DECL_TEMPLATE_INFO (d)
9901 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9902 /* Instantiations of template member functions are never copy
9903 functions. Note that member functions of templated classes are
9904 represented as template functions internally, and we must
9905 accept those as copy functions. */
9908 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9912 arg_type = TREE_VALUE (args);
9913 if (arg_type == error_mark_node)
9916 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9917 && TYPE_REF_IS_RVALUE (arg_type)
9918 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9922 args = TREE_CHAIN (args);
9924 if (args && args != void_list_node && !TREE_PURPOSE (args))
9925 /* There are more non-optional args. */
9931 /* Remember any special properties of member function DECL. */
9933 #define DECL_DEFAULTED_IN_CLASS_P(DECL) \
9934 (DECL_DEFAULTED_FN (DECL) \
9935 && (DECL_ARTIFICIAL (DECL) || DECL_INITIALIZED_IN_CLASS_P (DECL)))
9938 grok_special_member_properties (tree decl)
9942 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9945 class_type = DECL_CONTEXT (decl);
9946 if (DECL_CONSTRUCTOR_P (decl))
9948 int ctor = copy_fn_p (decl);
9950 if (!DECL_ARTIFICIAL (decl))
9951 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9957 A non-template constructor for class X is a copy
9958 constructor if its first parameter is of type X&, const
9959 X&, volatile X& or const volatile X&, and either there
9960 are no other parameters or else all other parameters have
9961 default arguments. */
9962 TYPE_HAS_INIT_REF (class_type) = 1;
9963 if (!DECL_DEFAULTED_IN_CLASS_P (decl))
9964 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9966 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9968 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9970 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9971 if (TREE_CODE (decl) == TEMPLATE_DECL
9972 || !DECL_DEFAULTED_IN_CLASS_P (decl))
9973 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
9975 else if (is_list_ctor (decl))
9976 TYPE_HAS_LIST_CTOR (class_type) = 1;
9978 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9982 A non-template assignment operator for class X is a copy
9983 assignment operator if its parameter is of type X, X&, const
9984 X&, volatile X& or const volatile X&. */
9986 int assop = copy_fn_p (decl);
9990 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9991 if (!DECL_DEFAULTED_IN_CLASS_P (decl))
9992 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
9994 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9999 /* Check a constructor DECL has the correct form. Complains
10000 if the class has a constructor of the form X(X). */
10003 grok_ctor_properties (const_tree ctype, const_tree decl)
10005 int ctor_parm = copy_fn_p (decl);
10011 A declaration of a constructor for a class X is ill-formed if
10012 its first parameter is of type (optionally cv-qualified) X
10013 and either there are no other parameters or else all other
10014 parameters have default arguments.
10016 We *don't* complain about member template instantiations that
10017 have this form, though; they can occur as we try to decide
10018 what constructor to use during overload resolution. Since
10019 overload resolution will never prefer such a constructor to
10020 the non-template copy constructor (which is either explicitly
10021 or implicitly defined), there's no need to worry about their
10022 existence. Theoretically, they should never even be
10023 instantiated, but that's hard to forestall. */
10024 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10032 /* An operator with this code is unary, but can also be binary. */
10035 ambi_op_p (enum tree_code code)
10037 return (code == INDIRECT_REF
10038 || code == ADDR_EXPR
10039 || code == UNARY_PLUS_EXPR
10040 || code == NEGATE_EXPR
10041 || code == PREINCREMENT_EXPR
10042 || code == PREDECREMENT_EXPR);
10045 /* An operator with this name can only be unary. */
10048 unary_op_p (enum tree_code code)
10050 return (code == TRUTH_NOT_EXPR
10051 || code == BIT_NOT_EXPR
10052 || code == COMPONENT_REF
10053 || code == TYPE_EXPR);
10056 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10057 errors are issued for invalid declarations. */
10060 grok_op_properties (tree decl, bool complain)
10062 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10064 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10065 tree name = DECL_NAME (decl);
10066 enum tree_code operator_code;
10071 /* Count the number of arguments and check for ellipsis. */
10072 for (argtype = argtypes, arity = 0;
10073 argtype && argtype != void_list_node;
10074 argtype = TREE_CHAIN (argtype))
10076 ellipsis_p = !argtype;
10078 class_type = DECL_CONTEXT (decl);
10079 if (class_type && !CLASS_TYPE_P (class_type))
10080 class_type = NULL_TREE;
10082 if (DECL_CONV_FN_P (decl))
10083 operator_code = TYPE_EXPR;
10087 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10088 if (ansi_opname (CODE) == name) \
10090 operator_code = (CODE); \
10093 else if (ansi_assopname (CODE) == name) \
10095 operator_code = (CODE); \
10096 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10100 #include "operators.def"
10101 #undef DEF_OPERATOR
10103 gcc_unreachable ();
10106 gcc_assert (operator_code != MAX_TREE_CODES);
10107 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10110 switch (operator_code)
10113 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10117 TYPE_GETS_DELETE (class_type) |= 1;
10121 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10124 case VEC_DELETE_EXPR:
10125 TYPE_GETS_DELETE (class_type) |= 2;
10132 /* [basic.std.dynamic.allocation]/1:
10134 A program is ill-formed if an allocation function is declared
10135 in a namespace scope other than global scope or declared static
10138 The same also holds true for deallocation functions. */
10139 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10140 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10142 if (DECL_NAMESPACE_SCOPE_P (decl))
10144 if (CP_DECL_CONTEXT (decl) != global_namespace)
10146 error ("%qD may not be declared within a namespace", decl);
10149 else if (!TREE_PUBLIC (decl))
10151 error ("%qD may not be declared as static", decl);
10157 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10159 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10160 DECL_IS_OPERATOR_NEW (decl) = 1;
10162 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10163 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10166 /* An operator function must either be a non-static member function
10167 or have at least one parameter of a class, a reference to a class,
10168 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10169 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10171 if (operator_code == TYPE_EXPR
10172 || operator_code == CALL_EXPR
10173 || operator_code == COMPONENT_REF
10174 || operator_code == ARRAY_REF
10175 || operator_code == NOP_EXPR)
10177 error ("%qD must be a nonstatic member function", decl);
10184 if (DECL_STATIC_FUNCTION_P (decl))
10186 error ("%qD must be either a non-static member "
10187 "function or a non-member function", decl);
10191 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10193 tree arg = non_reference (TREE_VALUE (p));
10194 if (arg == error_mark_node)
10197 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10198 because these checks are performed even on
10199 template functions. */
10200 if (MAYBE_CLASS_TYPE_P (arg)
10201 || TREE_CODE (arg) == ENUMERAL_TYPE)
10205 if (!p || p == void_list_node)
10208 error ("%qD must have an argument of class or "
10209 "enumerated type", decl);
10215 /* There are no restrictions on the arguments to an overloaded
10217 if (operator_code == CALL_EXPR)
10220 /* Warn about conversion operators that will never be used. */
10221 if (IDENTIFIER_TYPENAME_P (name)
10222 && ! DECL_TEMPLATE_INFO (decl)
10224 /* Warn only declaring the function; there is no need to
10225 warn again about out-of-class definitions. */
10226 && class_type == current_class_type)
10228 tree t = TREE_TYPE (name);
10229 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10230 const char *what = 0;
10233 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10235 if (TREE_CODE (t) == VOID_TYPE)
10237 else if (class_type)
10239 if (t == class_type)
10240 what = "the same type";
10241 /* Don't force t to be complete here. */
10242 else if (MAYBE_CLASS_TYPE_P (t)
10243 && COMPLETE_TYPE_P (t)
10244 && DERIVED_FROM_P (t, class_type))
10245 what = "a base class";
10249 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10250 "conversion operator",
10251 ref ? "a reference to " : "", what);
10254 if (operator_code == COND_EXPR)
10257 error ("ISO C++ prohibits overloading operator ?:");
10260 else if (ellipsis_p)
10262 error ("%qD must not have variable number of arguments", decl);
10265 else if (ambi_op_p (operator_code))
10268 /* We pick the one-argument operator codes by default, so
10269 we don't have to change anything. */
10271 else if (arity == 2)
10273 /* If we thought this was a unary operator, we now know
10274 it to be a binary operator. */
10275 switch (operator_code)
10278 operator_code = MULT_EXPR;
10282 operator_code = BIT_AND_EXPR;
10285 case UNARY_PLUS_EXPR:
10286 operator_code = PLUS_EXPR;
10290 operator_code = MINUS_EXPR;
10293 case PREINCREMENT_EXPR:
10294 operator_code = POSTINCREMENT_EXPR;
10297 case PREDECREMENT_EXPR:
10298 operator_code = POSTDECREMENT_EXPR;
10302 gcc_unreachable ();
10305 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10307 if ((operator_code == POSTINCREMENT_EXPR
10308 || operator_code == POSTDECREMENT_EXPR)
10309 && ! processing_template_decl
10310 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10313 error ("postfix %qD must take %<int%> as its argument",
10316 error ("postfix %qD must take %<int%> as its second "
10324 error ("%qD must take either zero or one argument", decl);
10326 error ("%qD must take either one or two arguments", decl);
10330 /* More Effective C++ rule 6. */
10332 && (operator_code == POSTINCREMENT_EXPR
10333 || operator_code == POSTDECREMENT_EXPR
10334 || operator_code == PREINCREMENT_EXPR
10335 || operator_code == PREDECREMENT_EXPR))
10337 tree arg = TREE_VALUE (argtypes);
10338 tree ret = TREE_TYPE (TREE_TYPE (decl));
10339 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10340 arg = TREE_TYPE (arg);
10341 arg = TYPE_MAIN_VARIANT (arg);
10342 if (operator_code == PREINCREMENT_EXPR
10343 || operator_code == PREDECREMENT_EXPR)
10345 if (TREE_CODE (ret) != REFERENCE_TYPE
10346 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10348 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10349 build_reference_type (arg));
10353 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10354 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10358 else if (unary_op_p (operator_code))
10363 error ("%qD must take %<void%>", decl);
10365 error ("%qD must take exactly one argument", decl);
10369 else /* if (binary_op_p (operator_code)) */
10374 error ("%qD must take exactly one argument", decl);
10376 error ("%qD must take exactly two arguments", decl);
10380 /* More Effective C++ rule 7. */
10382 && (operator_code == TRUTH_ANDIF_EXPR
10383 || operator_code == TRUTH_ORIF_EXPR
10384 || operator_code == COMPOUND_EXPR))
10385 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10389 /* Effective C++ rule 23. */
10392 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10393 && (operator_code == PLUS_EXPR
10394 || operator_code == MINUS_EXPR
10395 || operator_code == TRUNC_DIV_EXPR
10396 || operator_code == MULT_EXPR
10397 || operator_code == TRUNC_MOD_EXPR)
10398 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10399 warning (OPT_Weffc__, "%qD should return by value", decl);
10401 /* [over.oper]/8 */
10402 for (; argtypes && argtypes != void_list_node;
10403 argtypes = TREE_CHAIN (argtypes))
10404 if (TREE_PURPOSE (argtypes))
10406 TREE_PURPOSE (argtypes) = NULL_TREE;
10407 if (operator_code == POSTINCREMENT_EXPR
10408 || operator_code == POSTDECREMENT_EXPR)
10410 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10415 error ("%qD cannot have default arguments", decl);
10423 /* Return a string giving the keyword associate with CODE. */
10425 static const char *
10426 tag_name (enum tag_types code)
10438 case typename_type:
10441 gcc_unreachable ();
10445 /* Name lookup in an elaborated-type-specifier (after the keyword
10446 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10447 elaborated-type-specifier is invalid, issue a diagnostic and return
10448 error_mark_node; otherwise, return the *_TYPE to which it referred.
10449 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10452 check_elaborated_type_specifier (enum tag_types tag_code,
10454 bool allow_template_p)
10460 struct S { struct S *p; };
10462 name lookup will find the TYPE_DECL for the implicit "S::S"
10463 typedef. Adjust for that here. */
10464 if (DECL_SELF_REFERENCE_P (decl))
10465 decl = TYPE_NAME (TREE_TYPE (decl));
10467 type = TREE_TYPE (decl);
10469 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10470 is false for this case as well. */
10471 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10473 error ("using template type parameter %qT after %qs",
10474 type, tag_name (tag_code));
10475 return error_mark_node;
10479 If the identifier resolves to a typedef-name or a template
10480 type-parameter, the elaborated-type-specifier is ill-formed.
10482 In other words, the only legitimate declaration to use in the
10483 elaborated type specifier is the implicit typedef created when
10484 the type is declared. */
10485 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10486 && tag_code != typename_type)
10488 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10489 error ("%q+D has a previous declaration here", decl);
10490 return error_mark_node;
10492 else if (TREE_CODE (type) != RECORD_TYPE
10493 && TREE_CODE (type) != UNION_TYPE
10494 && tag_code != enum_type
10495 && tag_code != typename_type)
10497 error ("%qT referred to as %qs", type, tag_name (tag_code));
10498 error ("%q+T has a previous declaration here", type);
10499 return error_mark_node;
10501 else if (TREE_CODE (type) != ENUMERAL_TYPE
10502 && tag_code == enum_type)
10504 error ("%qT referred to as enum", type);
10505 error ("%q+T has a previous declaration here", type);
10506 return error_mark_node;
10508 else if (!allow_template_p
10509 && TREE_CODE (type) == RECORD_TYPE
10510 && CLASSTYPE_IS_TEMPLATE (type))
10512 /* If a class template appears as elaborated type specifier
10513 without a template header such as:
10515 template <class T> class C {};
10516 void f(class C); // No template header here
10518 then the required template argument is missing. */
10519 error ("template argument required for %<%s %T%>",
10520 tag_name (tag_code),
10521 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10522 return error_mark_node;
10528 /* Lookup NAME in elaborate type specifier in scope according to
10529 SCOPE and issue diagnostics if necessary.
10530 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10531 found, and ERROR_MARK_NODE for type error. */
10534 lookup_and_check_tag (enum tag_types tag_code, tree name,
10535 tag_scope scope, bool template_header_p)
10539 if (scope == ts_global)
10541 /* First try ordinary name lookup, ignoring hidden class name
10542 injected via friend declaration. */
10543 decl = lookup_name_prefer_type (name, 2);
10544 /* If that fails, the name will be placed in the smallest
10545 non-class, non-function-prototype scope according to 3.3.1/5.
10546 We may already have a hidden name declared as friend in this
10547 scope. So lookup again but not ignoring hidden names.
10548 If we find one, that name will be made visible rather than
10549 creating a new tag. */
10551 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10554 decl = lookup_type_scope (name, scope);
10556 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10557 decl = DECL_TEMPLATE_RESULT (decl);
10559 if (decl && TREE_CODE (decl) == TYPE_DECL)
10561 /* Look for invalid nested type:
10565 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10567 error ("%qD has the same name as the class in which it is "
10570 return error_mark_node;
10573 /* Two cases we need to consider when deciding if a class
10574 template is allowed as an elaborated type specifier:
10575 1. It is a self reference to its own class.
10576 2. It comes with a template header.
10580 template <class T> class C {
10581 class C *c1; // DECL_SELF_REFERENCE_P is true
10584 template <class U> class C; // template_header_p is true
10585 template <class T> class C<T>::D {
10586 class C *c2; // DECL_SELF_REFERENCE_P is true
10589 t = check_elaborated_type_specifier (tag_code,
10592 | DECL_SELF_REFERENCE_P (decl));
10595 else if (decl && TREE_CODE (decl) == TREE_LIST)
10597 error ("reference to %qD is ambiguous", name);
10598 print_candidates (decl);
10599 return error_mark_node;
10605 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10606 Define the tag as a forward-reference if it is not defined.
10608 If a declaration is given, process it here, and report an error if
10609 multiple declarations are not identical.
10611 SCOPE is TS_CURRENT when this is also a definition. Only look in
10612 the current frame for the name (since C++ allows new names in any
10613 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10614 declaration. Only look beginning from the current scope outward up
10615 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10617 TEMPLATE_HEADER_P is true when this declaration is preceded by
10618 a set of template parameters. */
10621 xref_tag (enum tag_types tag_code, tree name,
10622 tag_scope scope, bool template_header_p)
10624 enum tree_code code;
10626 tree context = NULL_TREE;
10628 timevar_push (TV_NAME_LOOKUP);
10630 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10636 code = RECORD_TYPE;
10642 code = ENUMERAL_TYPE;
10645 gcc_unreachable ();
10648 /* In case of anonymous name, xref_tag is only called to
10649 make type node and push name. Name lookup is not required. */
10650 if (ANON_AGGRNAME_P (name))
10653 t = lookup_and_check_tag (tag_code, name,
10654 scope, template_header_p);
10656 if (t == error_mark_node)
10657 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10659 if (scope != ts_current && t && current_class_type
10660 && template_class_depth (current_class_type)
10661 && template_header_p)
10663 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10664 definition of this tag. Since, in addition, we are currently
10665 processing a (member) template declaration of a template
10666 class, we must be very careful; consider:
10673 { template <class V>
10674 friend struct S1; };
10676 Here, the S2::S1 declaration should not be confused with the
10677 outer declaration. In particular, the inner version should
10678 have a template parameter of level 2, not level 1. This
10679 would be particularly important if the member declaration
10682 template <class V = U> friend struct S1;
10684 say, when we should tsubst into `U' when instantiating
10685 S2. On the other hand, when presented with:
10695 we must find the inner binding eventually. We
10696 accomplish this by making sure that the new type we
10697 create to represent this declaration has the right
10699 context = TYPE_CONTEXT (t);
10705 /* If no such tag is yet defined, create a forward-reference node
10706 and record it as the "definition".
10707 When a real declaration of this type is found,
10708 the forward-reference will be altered into a real type. */
10709 if (code == ENUMERAL_TYPE)
10711 error ("use of enum %q#D without previous declaration", name);
10712 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10716 t = make_class_type (code);
10717 TYPE_CONTEXT (t) = context;
10718 t = pushtag (name, t, scope);
10723 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10725 if (!redeclare_class_template (t, current_template_parms))
10726 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10728 else if (!processing_template_decl
10729 && CLASS_TYPE_P (t)
10730 && CLASSTYPE_IS_TEMPLATE (t))
10732 error ("redeclaration of %qT as a non-template", t);
10733 error ("previous declaration %q+D", t);
10734 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10737 /* Make injected friend class visible. */
10738 if (scope != ts_within_enclosing_non_class
10739 && hidden_name_p (TYPE_NAME (t)))
10741 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10742 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10744 if (TYPE_TEMPLATE_INFO (t))
10746 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10747 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10752 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10756 xref_tag_from_type (tree old, tree id, tag_scope scope)
10758 enum tag_types tag_kind;
10760 if (TREE_CODE (old) == RECORD_TYPE)
10761 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10763 tag_kind = union_type;
10765 if (id == NULL_TREE)
10766 id = TYPE_IDENTIFIER (old);
10768 return xref_tag (tag_kind, id, scope, false);
10771 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10772 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10773 access_* node, and the TREE_VALUE is the type of the base-class.
10774 Non-NULL TREE_TYPE indicates virtual inheritance.
10776 Returns true if the binfo hierarchy was successfully created,
10777 false if an error was detected. */
10780 xref_basetypes (tree ref, tree base_list)
10783 tree binfo, base_binfo;
10784 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10785 unsigned max_bases = 0; /* Maximum direct bases. */
10787 tree default_access;
10788 tree igo_prev; /* Track Inheritance Graph Order. */
10790 if (ref == error_mark_node)
10793 /* The base of a derived class is private by default, all others are
10795 default_access = (TREE_CODE (ref) == RECORD_TYPE
10796 && CLASSTYPE_DECLARED_CLASS (ref)
10797 ? access_private_node : access_public_node);
10799 /* First, make sure that any templates in base-classes are
10800 instantiated. This ensures that if we call ourselves recursively
10801 we do not get confused about which classes are marked and which
10803 basep = &base_list;
10806 tree basetype = TREE_VALUE (*basep);
10808 if (!(processing_template_decl && uses_template_parms (basetype))
10809 && !complete_type_or_else (basetype, NULL))
10810 /* An incomplete type. Remove it from the list. */
10811 *basep = TREE_CHAIN (*basep);
10815 if (TREE_TYPE (*basep))
10817 if (CLASS_TYPE_P (basetype))
10818 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10819 basep = &TREE_CHAIN (*basep);
10823 TYPE_MARKED_P (ref) = 1;
10825 /* The binfo slot should be empty, unless this is an (ill-formed)
10827 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10828 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10830 binfo = make_tree_binfo (max_bases);
10832 TYPE_BINFO (ref) = binfo;
10833 BINFO_OFFSET (binfo) = size_zero_node;
10834 BINFO_TYPE (binfo) = ref;
10838 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10839 /* An aggregate cannot have baseclasses. */
10840 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10842 if (TREE_CODE (ref) == UNION_TYPE)
10844 error ("derived union %qT invalid", ref);
10851 if (TYPE_FOR_JAVA (ref))
10853 error ("Java class %qT cannot have multiple bases", ref);
10860 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10862 if (TYPE_FOR_JAVA (ref))
10864 error ("Java class %qT cannot have virtual bases", ref);
10869 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10871 tree access = TREE_PURPOSE (base_list);
10872 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10873 tree basetype = TREE_VALUE (base_list);
10875 if (access == access_default_node)
10876 access = default_access;
10878 if (PACK_EXPANSION_P (basetype))
10879 basetype = PACK_EXPANSION_PATTERN (basetype);
10880 if (TREE_CODE (basetype) == TYPE_DECL)
10881 basetype = TREE_TYPE (basetype);
10882 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10884 error ("base type %qT fails to be a struct or class type",
10889 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10890 TYPE_FOR_JAVA (ref) = 1;
10892 base_binfo = NULL_TREE;
10893 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10895 base_binfo = TYPE_BINFO (basetype);
10896 /* The original basetype could have been a typedef'd type. */
10897 basetype = BINFO_TYPE (base_binfo);
10899 /* Inherit flags from the base. */
10900 TYPE_HAS_NEW_OPERATOR (ref)
10901 |= TYPE_HAS_NEW_OPERATOR (basetype);
10902 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10903 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10904 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10905 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10906 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10907 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10908 CLASSTYPE_REPEATED_BASE_P (ref)
10909 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10912 /* We must do this test after we've seen through a typedef
10914 if (TYPE_MARKED_P (basetype))
10916 if (basetype == ref)
10917 error ("recursive type %qT undefined", basetype);
10919 error ("duplicate base type %qT invalid", basetype);
10923 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10924 /* Regenerate the pack expansion for the bases. */
10925 basetype = make_pack_expansion (basetype);
10927 TYPE_MARKED_P (basetype) = 1;
10929 base_binfo = copy_binfo (base_binfo, basetype, ref,
10930 &igo_prev, via_virtual);
10931 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10932 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10934 BINFO_BASE_APPEND (binfo, base_binfo);
10935 BINFO_BASE_ACCESS_APPEND (binfo, access);
10938 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10939 /* If we have space in the vbase vector, we must have shared at
10940 least one of them, and are therefore diamond shaped. */
10941 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10943 /* Unmark all the types. */
10944 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10945 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10946 TYPE_MARKED_P (ref) = 0;
10948 /* Now see if we have a repeated base type. */
10949 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10951 for (base_binfo = binfo; base_binfo;
10952 base_binfo = TREE_CHAIN (base_binfo))
10954 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10956 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10959 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10961 for (base_binfo = binfo; base_binfo;
10962 base_binfo = TREE_CHAIN (base_binfo))
10963 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10964 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10973 /* Begin compiling the definition of an enumeration type.
10976 UNDERLYING_TYPE is the type that will be used as the storage for
10977 the enumeration type. This should be NULL_TREE if no storage type
10980 SCOPED_ENUM_P is true if this is a scoped enumeration type.
10982 Returns the type object, as yet incomplete.
10983 Also records info about it so that build_enumerator
10984 may be used to declare the individual values as they are read. */
10987 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
10991 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10993 /* If this is the real definition for a previous forward reference,
10994 fill in the contents in the same object that used to be the
10995 forward reference. */
10997 enumtype = lookup_and_check_tag (enum_type, name,
10998 /*tag_scope=*/ts_current,
10999 /*template_header_p=*/false);
11001 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11003 error ("multiple definition of %q#T", enumtype);
11004 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
11005 /* Clear out TYPE_VALUES, and start again. */
11006 TYPE_VALUES (enumtype) = NULL_TREE;
11010 /* In case of error, make a dummy enum to allow parsing to
11012 if (enumtype == error_mark_node)
11013 name = make_anon_name ();
11015 enumtype = make_node (ENUMERAL_TYPE);
11016 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11019 if (enumtype == error_mark_node)
11024 SET_SCOPED_ENUM_P (enumtype, 1);
11025 begin_scope (sk_scoped_enum, enumtype);
11027 /* [C++0x dcl.enum]p5:
11029 If not explicitly specified, the underlying type of a scoped
11030 enumeration type is int. */
11031 if (!underlying_type)
11032 underlying_type = integer_type_node;
11035 if (underlying_type)
11037 if (CP_INTEGRAL_TYPE_P (underlying_type))
11039 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11040 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11041 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11042 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11043 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11044 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11045 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11046 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11047 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11048 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11050 else if (!dependent_type_p (underlying_type))
11051 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11052 underlying_type, enumtype);
11058 /* After processing and defining all the values of an enumeration type,
11059 install their decls in the enumeration type and finish it off.
11060 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11063 finish_enum (tree enumtype)
11072 bool use_short_enum;
11076 integer_type_kind itk;
11077 tree underlying_type = NULL_TREE;
11078 bool fixed_underlying_type_p
11079 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11081 /* We built up the VALUES in reverse order. */
11082 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11084 /* For an enum defined in a template, just set the type of the values;
11085 all further processing is postponed until the template is
11086 instantiated. We need to set the type so that tsubst of a CONST_DECL
11088 if (processing_template_decl)
11090 for (values = TYPE_VALUES (enumtype);
11092 values = TREE_CHAIN (values))
11093 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11094 if (at_function_scope_p ())
11095 add_stmt (build_min (TAG_DEFN, enumtype));
11096 if (SCOPED_ENUM_P (enumtype))
11101 /* Determine the minimum and maximum values of the enumerators. */
11102 if (TYPE_VALUES (enumtype))
11104 minnode = maxnode = NULL_TREE;
11106 for (values = TYPE_VALUES (enumtype);
11108 values = TREE_CHAIN (values))
11110 decl = TREE_VALUE (values);
11112 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11113 each enumerator has the type of its enumeration. Prior to the
11114 closing brace, the type of each enumerator is the type of its
11115 initializing value. */
11116 TREE_TYPE (decl) = enumtype;
11118 /* Update the minimum and maximum values, if appropriate. */
11119 value = DECL_INITIAL (decl);
11120 if (value == error_mark_node)
11121 value = integer_zero_node;
11122 /* Figure out what the minimum and maximum values of the
11123 enumerators are. */
11125 minnode = maxnode = value;
11126 else if (tree_int_cst_lt (maxnode, value))
11128 else if (tree_int_cst_lt (value, minnode))
11135 If the enumerator-list is empty, the underlying type is as if
11136 the enumeration had a single enumerator with value 0. */
11137 minnode = maxnode = integer_zero_node;
11139 /* Compute the number of bits require to represent all values of the
11140 enumeration. We must do this before the type of MINNODE and
11141 MAXNODE are transformed, since tree_int_cst_min_precision relies
11142 on the TREE_TYPE of the value it is passed. */
11143 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11144 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11145 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11146 precision = MAX (lowprec, highprec);
11148 if (!fixed_underlying_type_p)
11150 /* Determine the underlying type of the enumeration.
11154 The underlying type of an enumeration is an integral type that
11155 can represent all the enumerator values defined in the
11156 enumeration. It is implementation-defined which integral type is
11157 used as the underlying type for an enumeration except that the
11158 underlying type shall not be larger than int unless the value of
11159 an enumerator cannot fit in an int or unsigned int.
11161 We use "int" or an "unsigned int" as the underlying type, even if
11162 a smaller integral type would work, unless the user has
11163 explicitly requested that we use the smallest possible type. The
11164 user can request that for all enumerations with a command line
11165 flag, or for just one enumeration with an attribute. */
11167 use_short_enum = flag_short_enums
11168 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11170 for (itk = (use_short_enum ? itk_char : itk_int);
11174 underlying_type = integer_types[itk];
11175 if (TYPE_PRECISION (underlying_type) >= precision
11176 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11179 if (itk == itk_none)
11183 IF no integral type can represent all the enumerator values, the
11184 enumeration is ill-formed. */
11185 error ("no integral type can represent all of the enumerator values "
11186 "for %qT", enumtype);
11187 precision = TYPE_PRECISION (long_long_integer_type_node);
11188 underlying_type = integer_types[itk_unsigned_long_long];
11193 The value of sizeof() applied to an enumeration type, an object
11194 of an enumeration type, or an enumerator, is the value of sizeof()
11195 applied to the underlying type. */
11196 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11197 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11198 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11199 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11200 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11201 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11203 /* Set the underlying type of the enumeration type to the
11204 computed enumeration type, restricted to the enumerator
11206 ENUM_UNDERLYING_TYPE (enumtype) = copy_node (underlying_type);
11207 set_min_and_max_values_for_integral_type
11208 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11211 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11213 /* Compute the minimum and maximum values for the type.
11217 For an enumeration where emin is the smallest enumerator and emax
11218 is the largest, the values of the enumeration are the values of the
11219 underlying type in the range bmin to bmax, where bmin and bmax are,
11220 respectively, the smallest and largest values of the smallest bit-
11221 field that can store emin and emax. */
11223 /* The middle-end currently assumes that types with TYPE_PRECISION
11224 narrower than their underlying type are suitably zero or sign
11225 extended to fill their mode. g++ doesn't make these guarantees.
11226 Until the middle-end can represent such paradoxical types, we
11227 set the TYPE_PRECISION to the width of the underlying type. */
11228 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11230 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11232 /* Convert each of the enumerators to the type of the underlying
11233 type of the enumeration. */
11234 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11236 location_t saved_location;
11238 decl = TREE_VALUE (values);
11239 saved_location = input_location;
11240 input_location = DECL_SOURCE_LOCATION (decl);
11241 if (fixed_underlying_type_p)
11242 /* If the enumeration type has a fixed underlying type, we
11243 already checked all of the enumerator values. */
11244 value = DECL_INITIAL (decl);
11246 value = perform_implicit_conversion (underlying_type,
11247 DECL_INITIAL (decl),
11248 tf_warning_or_error);
11249 input_location = saved_location;
11251 /* Do not clobber shared ints. */
11252 value = copy_node (value);
11254 TREE_TYPE (value) = enumtype;
11255 DECL_INITIAL (decl) = value;
11258 /* Fix up all variant types of this enum type. */
11259 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11261 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11262 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11263 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11264 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11265 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11266 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11267 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11268 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11269 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11270 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11271 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11274 /* Finish up the scope of a scoped enumeration. */
11275 if (SCOPED_ENUM_P (enumtype))
11278 /* Finish debugging output for this type. */
11279 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11282 /* Build and install a CONST_DECL for an enumeration constant of the
11283 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11284 Assignment of sequential values by default is handled here. */
11287 build_enumerator (tree name, tree value, tree enumtype)
11293 /* If the VALUE was erroneous, pretend it wasn't there; that will
11294 result in the enum being assigned the next value in sequence. */
11295 if (value == error_mark_node)
11298 /* Remove no-op casts from the value. */
11300 STRIP_TYPE_NOPS (value);
11302 if (! processing_template_decl)
11304 /* Validate and default VALUE. */
11305 if (value != NULL_TREE)
11307 value = integral_constant_value (value);
11309 if (TREE_CODE (value) == INTEGER_CST)
11311 value = perform_integral_promotions (value);
11312 constant_expression_warning (value);
11316 error ("enumerator value for %qD is not an integer constant", name);
11321 /* Default based on previous value. */
11322 if (value == NULL_TREE)
11324 if (TYPE_VALUES (enumtype))
11327 unsigned HOST_WIDE_INT lo;
11331 /* The next value is the previous value plus one.
11332 add_double doesn't know the type of the target expression,
11333 so we must check with int_fits_type_p as well. */
11334 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11335 if (error_operand_p (prev_value))
11336 value = error_mark_node;
11339 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11340 TREE_INT_CST_HIGH (prev_value),
11342 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11344 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11348 error ("overflow in enumeration values at %qD", name);
11349 value = error_mark_node;
11354 value = integer_zero_node;
11357 /* Remove no-op casts from the value. */
11358 STRIP_TYPE_NOPS (value);
11360 /* If the underlying type of the enum is fixed, check whether
11361 the enumerator values fits in the underlying type. If it
11362 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11363 if (ENUM_UNDERLYING_TYPE (enumtype)
11365 && TREE_CODE (value) == INTEGER_CST
11366 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11368 error ("enumerator value %E is too large for underlying type %<%T%>",
11369 value, ENUM_UNDERLYING_TYPE (enumtype));
11371 /* Silently convert the value so that we can continue. */
11372 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11377 /* C++ associates enums with global, function, or class declarations. */
11378 context = current_scope ();
11380 /* Build the actual enumeration constant. Note that the enumeration
11381 constants have the underlying type of the enum (if it is fixed)
11382 or the type of their initializer (if the underlying type of the
11383 enum is not fixed):
11387 If the underlying type is fixed, the type of each enumerator
11388 prior to the closing brace is the underlying type; if the
11389 initializing value of an enumerator cannot be represented by
11390 the underlying type, the program is ill-formed. If the
11391 underlying type is not fixed, the type of each enumerator is
11392 the type of its initializing value.
11394 If the underlying type is not fixed, it will be computed by
11395 finish_enum and we will reset the type of this enumerator. Of
11396 course, if we're processing a template, there may be no value. */
11397 type = value ? TREE_TYPE (value) : NULL_TREE;
11399 if (context && context == current_class_type)
11400 /* This enum declaration is local to the class. We need the full
11401 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11402 decl = build_lang_decl (CONST_DECL, name, type);
11404 /* It's a global enum, or it's local to a function. (Note local to
11405 a function could mean local to a class method. */
11406 decl = build_decl (CONST_DECL, name, type);
11408 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11409 TREE_CONSTANT (decl) = 1;
11410 TREE_READONLY (decl) = 1;
11411 DECL_INITIAL (decl) = value;
11413 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11414 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11415 on the TYPE_FIELDS list for `S'. (That's so that you can say
11416 things like `S::i' later.) */
11417 finish_member_declaration (decl);
11421 /* Add this enumeration constant to the list for this type. */
11422 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11425 /* Look for an enumerator with the given NAME within the enumeration
11426 type ENUMTYPE. This routine is used primarily for qualified name
11427 lookup into an enumerator in C++0x, e.g.,
11429 enum class Color { Red, Green, Blue };
11431 Color color = Color::Red;
11433 Returns the value corresponding to the enumerator, or
11434 NULL_TREE if no such enumerator was found. */
11436 lookup_enumerator (tree enumtype, tree name)
11439 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11441 e = purpose_member (name, TYPE_VALUES (enumtype));
11442 return e? TREE_VALUE (e) : NULL_TREE;
11446 /* We're defining DECL. Make sure that it's type is OK. */
11449 check_function_type (tree decl, tree current_function_parms)
11451 tree fntype = TREE_TYPE (decl);
11452 tree return_type = complete_type (TREE_TYPE (fntype));
11454 /* In a function definition, arg types must be complete. */
11455 require_complete_types_for_parms (current_function_parms);
11457 if (dependent_type_p (return_type))
11459 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11460 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11462 tree args = TYPE_ARG_TYPES (fntype);
11464 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11465 error ("return type %q#T is incomplete", return_type);
11467 error ("return type has Java class type %q#T", return_type);
11469 /* Make it return void instead. */
11470 if (TREE_CODE (fntype) == METHOD_TYPE)
11471 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11473 TREE_CHAIN (args));
11475 fntype = build_function_type (void_type_node, args);
11477 = build_exception_variant (fntype,
11478 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11481 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11484 /* Create the FUNCTION_DECL for a function definition.
11485 DECLSPECS and DECLARATOR are the parts of the declaration;
11486 they describe the function's name and the type it returns,
11487 but twisted together in a fashion that parallels the syntax of C.
11489 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11490 DECLARATOR is really the DECL for the function we are about to
11491 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11492 indicating that the function is an inline defined in-class.
11494 This function creates a binding context for the function body
11495 as well as setting up the FUNCTION_DECL in current_function_decl.
11497 For C++, we must first check whether that datum makes any sense.
11498 For example, "class A local_a(1,2);" means that variable local_a
11499 is an aggregate of type A, which should have a constructor
11500 applied to it with the argument list [1, 2].
11502 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11503 or may be a BLOCK if the function has been defined previously
11504 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11505 error_mark_node if the function has never been defined, or
11506 a BLOCK if the function has been defined somewhere. */
11509 start_preparsed_function (tree decl1, tree attrs, int flags)
11511 tree ctype = NULL_TREE;
11514 int doing_friend = 0;
11515 struct cp_binding_level *bl;
11516 tree current_function_parms;
11517 struct c_fileinfo *finfo
11518 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11519 bool honor_interface;
11521 /* Sanity check. */
11522 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11523 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11525 fntype = TREE_TYPE (decl1);
11526 if (TREE_CODE (fntype) == METHOD_TYPE)
11527 ctype = TYPE_METHOD_BASETYPE (fntype);
11529 /* ISO C++ 11.4/5. A friend function defined in a class is in
11530 the (lexical) scope of the class in which it is defined. */
11531 if (!ctype && DECL_FRIEND_P (decl1))
11533 ctype = DECL_FRIEND_CONTEXT (decl1);
11535 /* CTYPE could be null here if we're dealing with a template;
11536 for example, `inline friend float foo()' inside a template
11537 will have no CTYPE set. */
11538 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11544 if (DECL_DECLARED_INLINE_P (decl1)
11545 && lookup_attribute ("noinline", attrs))
11546 warning (0, "inline function %q+D given attribute noinline", decl1);
11548 /* Handle gnu_inline attribute. */
11549 if (GNU_INLINE_P (decl1))
11551 DECL_EXTERNAL (decl1) = 1;
11552 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11553 DECL_INTERFACE_KNOWN (decl1) = 1;
11554 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11557 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11558 /* This is a constructor, we must ensure that any default args
11559 introduced by this definition are propagated to the clones
11560 now. The clones are used directly in overload resolution. */
11561 adjust_clone_args (decl1);
11563 /* Sometimes we don't notice that a function is a static member, and
11564 build a METHOD_TYPE for it. Fix that up now. */
11565 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11566 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11568 revert_static_member_fn (decl1);
11572 /* Set up current_class_type, and enter the scope of the class, if
11575 push_nested_class (ctype);
11576 else if (DECL_STATIC_FUNCTION_P (decl1))
11577 push_nested_class (DECL_CONTEXT (decl1));
11579 /* Now that we have entered the scope of the class, we must restore
11580 the bindings for any template parameters surrounding DECL1, if it
11581 is an inline member template. (Order is important; consider the
11582 case where a template parameter has the same name as a field of
11583 the class.) It is not until after this point that
11584 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11585 if (flags & SF_INCLASS_INLINE)
11586 maybe_begin_member_template_processing (decl1);
11588 /* Effective C++ rule 15. */
11590 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11591 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11592 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11594 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11595 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11596 if (!DECL_INITIAL (decl1))
11597 DECL_INITIAL (decl1) = error_mark_node;
11599 /* This function exists in static storage.
11600 (This does not mean `static' in the C sense!) */
11601 TREE_STATIC (decl1) = 1;
11603 /* We must call push_template_decl after current_class_type is set
11604 up. (If we are processing inline definitions after exiting a
11605 class scope, current_class_type will be NULL_TREE until set above
11606 by push_nested_class.) */
11607 if (processing_template_decl)
11609 /* FIXME: Handle error_mark_node more gracefully. */
11610 tree newdecl1 = push_template_decl (decl1);
11611 if (newdecl1 != error_mark_node)
11615 /* We are now in the scope of the function being defined. */
11616 current_function_decl = decl1;
11618 /* Save the parm names or decls from this function's declarator
11619 where store_parm_decls will find them. */
11620 current_function_parms = DECL_ARGUMENTS (decl1);
11622 /* Make sure the parameter and return types are reasonable. When
11623 you declare a function, these types can be incomplete, but they
11624 must be complete when you define the function. */
11625 check_function_type (decl1, current_function_parms);
11627 /* Build the return declaration for the function. */
11628 restype = TREE_TYPE (fntype);
11629 if (DECL_RESULT (decl1) == NULL_TREE)
11633 resdecl = build_decl (RESULT_DECL, 0, restype);
11634 DECL_ARTIFICIAL (resdecl) = 1;
11635 DECL_IGNORED_P (resdecl) = 1;
11636 DECL_RESULT (decl1) = resdecl;
11638 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11641 /* Let the user know we're compiling this function. */
11642 announce_function (decl1);
11644 /* Record the decl so that the function name is defined.
11645 If we already have a decl for this name, and it is a FUNCTION_DECL,
11646 use the old decl. */
11647 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11649 /* A specialization is not used to guide overload resolution. */
11650 if (!DECL_FUNCTION_MEMBER_P (decl1)
11651 && !(DECL_USE_TEMPLATE (decl1) &&
11652 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11654 tree olddecl = pushdecl (decl1);
11656 if (olddecl == error_mark_node)
11657 /* If something went wrong when registering the declaration,
11658 use DECL1; we have to have a FUNCTION_DECL to use when
11659 parsing the body of the function. */
11663 /* Otherwise, OLDDECL is either a previous declaration
11664 of the same function or DECL1 itself. */
11666 if (warn_missing_declarations
11667 && olddecl == decl1
11668 && !DECL_MAIN_P (decl1)
11669 && TREE_PUBLIC (decl1)
11670 && !DECL_DECLARED_INLINE_P (decl1))
11674 /* Check whether DECL1 is in an anonymous
11676 for (context = DECL_CONTEXT (decl1);
11678 context = DECL_CONTEXT (context))
11680 if (TREE_CODE (context) == NAMESPACE_DECL
11681 && DECL_NAME (context) == NULL_TREE)
11685 if (context == NULL)
11686 warning (OPT_Wmissing_declarations,
11687 "no previous declaration for %q+D", decl1);
11695 /* We need to set the DECL_CONTEXT. */
11696 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11697 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11699 fntype = TREE_TYPE (decl1);
11701 /* If #pragma weak applies, mark the decl appropriately now.
11702 The pragma only applies to global functions. Because
11703 determining whether or not the #pragma applies involves
11704 computing the mangled name for the declaration, we cannot
11705 apply the pragma until after we have merged this declaration
11706 with any previous declarations; if the original declaration
11707 has a linkage specification, that specification applies to
11708 the definition as well, and may affect the mangled name. */
11709 if (!DECL_CONTEXT (decl1))
11710 maybe_apply_pragma_weak (decl1);
11713 /* Reset this in case the call to pushdecl changed it. */
11714 current_function_decl = decl1;
11716 gcc_assert (DECL_INITIAL (decl1));
11718 /* This function may already have been parsed, in which case just
11719 return; our caller will skip over the body without parsing. */
11720 if (DECL_INITIAL (decl1) != error_mark_node)
11723 /* Initialize RTL machinery. We cannot do this until
11724 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11725 even when processing a template; this is how we get
11726 CFUN set up, and our per-function variables initialized.
11727 FIXME factor out the non-RTL stuff. */
11728 bl = current_binding_level;
11729 allocate_struct_function (decl1, processing_template_decl);
11731 /* Initialize the language data structures. Whenever we start
11732 a new function, we destroy temporaries in the usual way. */
11733 cfun->language = GGC_CNEW (struct language_function);
11734 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11735 current_binding_level = bl;
11737 /* Even though we're inside a function body, we still don't want to
11738 call expand_expr to calculate the size of a variable-sized array.
11739 We haven't necessarily assigned RTL to all variables yet, so it's
11740 not safe to try to expand expressions involving them. */
11741 cfun->dont_save_pending_sizes_p = 1;
11743 /* Start the statement-tree, start the tree now. */
11744 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11746 /* If we are (erroneously) defining a function that we have already
11747 defined before, wipe out what we knew before. */
11748 if (!DECL_PENDING_INLINE_P (decl1))
11749 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11751 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11753 /* We know that this was set up by `grokclassfn'. We do not
11754 wait until `store_parm_decls', since evil parse errors may
11755 never get us to that point. Here we keep the consistency
11756 between `current_class_type' and `current_class_ptr'. */
11757 tree t = DECL_ARGUMENTS (decl1);
11759 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11760 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11762 cp_function_chain->x_current_class_ref
11763 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11764 cp_function_chain->x_current_class_ptr = t;
11766 /* Constructors and destructors need to know whether they're "in
11767 charge" of initializing virtual base classes. */
11768 t = TREE_CHAIN (t);
11769 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11771 current_in_charge_parm = t;
11772 t = TREE_CHAIN (t);
11774 if (DECL_HAS_VTT_PARM_P (decl1))
11776 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11777 current_vtt_parm = t;
11781 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11782 /* Implicitly-defined methods (like the
11783 destructor for a class in which no destructor
11784 is explicitly declared) must not be defined
11785 until their definition is needed. So, we
11786 ignore interface specifications for
11787 compiler-generated functions. */
11788 && !DECL_ARTIFICIAL (decl1));
11790 if (DECL_INTERFACE_KNOWN (decl1))
11792 tree ctx = decl_function_context (decl1);
11794 if (DECL_NOT_REALLY_EXTERN (decl1))
11795 DECL_EXTERNAL (decl1) = 0;
11797 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11798 && TREE_PUBLIC (ctx))
11799 /* This is a function in a local class in an extern inline
11801 comdat_linkage (decl1);
11803 /* If this function belongs to an interface, it is public.
11804 If it belongs to someone else's interface, it is also external.
11805 This only affects inlines and template instantiations. */
11806 else if (!finfo->interface_unknown && honor_interface)
11808 if (DECL_DECLARED_INLINE_P (decl1)
11809 || DECL_TEMPLATE_INSTANTIATION (decl1)
11810 || processing_template_decl)
11812 DECL_EXTERNAL (decl1)
11813 = (finfo->interface_only
11814 || (DECL_DECLARED_INLINE_P (decl1)
11815 && ! flag_implement_inlines
11816 && !DECL_VINDEX (decl1)));
11818 /* For WIN32 we also want to put these in linkonce sections. */
11819 maybe_make_one_only (decl1);
11822 DECL_EXTERNAL (decl1) = 0;
11823 DECL_INTERFACE_KNOWN (decl1) = 1;
11824 /* If this function is in an interface implemented in this file,
11825 make sure that the back end knows to emit this function
11827 if (!DECL_EXTERNAL (decl1))
11828 mark_needed (decl1);
11830 else if (finfo->interface_unknown && finfo->interface_only
11831 && honor_interface)
11833 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11834 interface, we will have both finfo->interface_unknown and
11835 finfo->interface_only set. In that case, we don't want to
11836 use the normal heuristics because someone will supply a
11837 #pragma implementation elsewhere, and deducing it here would
11838 produce a conflict. */
11839 comdat_linkage (decl1);
11840 DECL_EXTERNAL (decl1) = 0;
11841 DECL_INTERFACE_KNOWN (decl1) = 1;
11842 DECL_DEFER_OUTPUT (decl1) = 1;
11846 /* This is a definition, not a reference.
11847 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11848 if (!GNU_INLINE_P (decl1))
11849 DECL_EXTERNAL (decl1) = 0;
11851 if ((DECL_DECLARED_INLINE_P (decl1)
11852 || DECL_TEMPLATE_INSTANTIATION (decl1))
11853 && ! DECL_INTERFACE_KNOWN (decl1)
11854 /* Don't try to defer nested functions for now. */
11855 && ! decl_function_context (decl1))
11856 DECL_DEFER_OUTPUT (decl1) = 1;
11858 DECL_INTERFACE_KNOWN (decl1) = 1;
11861 /* Determine the ELF visibility attribute for the function. We must not
11862 do this before calling "pushdecl", as we must allow "duplicate_decls"
11863 to merge any attributes appropriately. We also need to wait until
11865 if (!DECL_CLONED_FUNCTION_P (decl1))
11866 determine_visibility (decl1);
11868 begin_scope (sk_function_parms, decl1);
11872 if (DECL_DESTRUCTOR_P (decl1)
11873 || (DECL_CONSTRUCTOR_P (decl1)
11874 && targetm.cxx.cdtor_returns_this ()))
11876 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
11877 DECL_CONTEXT (cdtor_label) = current_function_decl;
11880 start_fname_decls ();
11882 store_parm_decls (current_function_parms);
11886 /* Like start_preparsed_function, except that instead of a
11887 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11889 Returns 1 on success. If the DECLARATOR is not suitable for a function
11890 (it defines a datum instead), we return 0, which tells
11891 yyparse to report a parse error. */
11894 start_function (cp_decl_specifier_seq *declspecs,
11895 const cp_declarator *declarator,
11900 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11901 if (decl1 == error_mark_node)
11903 /* If the declarator is not suitable for a function definition,
11904 cause a syntax error. */
11905 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11907 error ("invalid function declaration");
11911 if (DECL_MAIN_P (decl1))
11912 /* main must return int. grokfndecl should have corrected it
11913 (and issued a diagnostic) if the user got it wrong. */
11914 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11915 integer_type_node));
11917 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11922 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11926 use_eh_spec_block (tree fn)
11928 return (flag_exceptions && flag_enforce_eh_specs
11929 && !processing_template_decl
11930 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11931 /* We insert the EH_SPEC_BLOCK only in the original
11932 function; then, it is copied automatically to the
11934 && !DECL_CLONED_FUNCTION_P (fn)
11935 /* Implicitly-generated constructors and destructors have
11936 exception specifications. However, those specifications
11937 are the union of the possible exceptions specified by the
11938 constructors/destructors for bases and members, so no
11939 unallowed exception will ever reach this function. By
11940 not creating the EH_SPEC_BLOCK we save a little memory,
11941 and we avoid spurious warnings about unreachable
11943 && !DECL_ARTIFICIAL (fn));
11946 /* Store the parameter declarations into the current function declaration.
11947 This is called after parsing the parameter declarations, before
11948 digesting the body of the function.
11950 Also install to binding contour return value identifier, if any. */
11953 store_parm_decls (tree current_function_parms)
11955 tree fndecl = current_function_decl;
11958 /* This is a chain of any other decls that came in among the parm
11959 declarations. If a parm is declared with enum {foo, bar} x;
11960 then CONST_DECLs for foo and bar are put here. */
11961 tree nonparms = NULL_TREE;
11963 if (current_function_parms)
11965 /* This case is when the function was defined with an ANSI prototype.
11966 The parms already have decls, so we need not do anything here
11967 except record them as in effect
11968 and complain if any redundant old-style parm decls were written. */
11970 tree specparms = current_function_parms;
11973 /* Must clear this because it might contain TYPE_DECLs declared
11975 current_binding_level->names = NULL;
11977 /* If we're doing semantic analysis, then we'll call pushdecl
11978 for each of these. We must do them in reverse order so that
11979 they end in the correct forward order. */
11980 specparms = nreverse (specparms);
11982 for (parm = specparms; parm; parm = next)
11984 next = TREE_CHAIN (parm);
11985 if (TREE_CODE (parm) == PARM_DECL)
11987 if (DECL_NAME (parm) == NULL_TREE
11988 || TREE_CODE (parm) != VOID_TYPE)
11991 error ("parameter %qD declared void", parm);
11995 /* If we find an enum constant or a type tag,
11996 put it aside for the moment. */
11997 TREE_CHAIN (parm) = NULL_TREE;
11998 nonparms = chainon (nonparms, parm);
12002 /* Get the decls in their original chain order and record in the
12003 function. This is all and only the PARM_DECLs that were
12004 pushed into scope by the loop above. */
12005 DECL_ARGUMENTS (fndecl) = getdecls ();
12008 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12010 /* Now store the final chain of decls for the arguments
12011 as the decl-chain of the current lexical scope.
12012 Put the enumerators in as well, at the front so that
12013 DECL_ARGUMENTS is not modified. */
12014 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12016 if (use_eh_spec_block (current_function_decl))
12017 current_eh_spec_block = begin_eh_spec_block ();
12021 /* We have finished doing semantic analysis on DECL, but have not yet
12022 generated RTL for its body. Save away our current state, so that
12023 when we want to generate RTL later we know what to do. */
12026 save_function_data (tree decl)
12028 struct language_function *f;
12030 /* Save the language-specific per-function data so that we can
12031 get it back when we really expand this function. */
12032 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12035 f = GGC_NEW (struct language_function);
12036 memcpy (f, cp_function_chain, sizeof (struct language_function));
12037 DECL_SAVED_FUNCTION_DATA (decl) = f;
12039 /* Clear out the bits we don't need. */
12040 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12041 f->bindings = NULL;
12042 f->x_local_names = NULL;
12046 /* Set the return value of the constructor (if present). */
12049 finish_constructor_body (void)
12054 if (targetm.cxx.cdtor_returns_this ()
12055 && (! TYPE_FOR_JAVA (current_class_type)))
12057 /* Any return from a constructor will end up here. */
12058 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
12060 val = DECL_ARGUMENTS (current_function_decl);
12061 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12062 DECL_RESULT (current_function_decl), val);
12063 /* Return the address of the object. */
12064 exprstmt = build_stmt (RETURN_EXPR, val);
12065 add_stmt (exprstmt);
12069 /* Do all the processing for the beginning of a destructor; set up the
12070 vtable pointers and cleanups for bases and members. */
12073 begin_destructor_body (void)
12075 tree compound_stmt;
12077 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12078 issued an error message. We still want to try to process the
12079 body of the function, but initialize_vtbl_ptrs will crash if
12080 TYPE_BINFO is NULL. */
12081 if (COMPLETE_TYPE_P (current_class_type))
12083 compound_stmt = begin_compound_stmt (0);
12084 /* Make all virtual function table pointers in non-virtual base
12085 classes point to CURRENT_CLASS_TYPE's virtual function
12087 initialize_vtbl_ptrs (current_class_ptr);
12088 finish_compound_stmt (compound_stmt);
12090 /* And insert cleanups for our bases and members so that they
12091 will be properly destroyed if we throw. */
12092 push_base_cleanups ();
12096 /* At the end of every destructor we generate code to delete the object if
12097 necessary. Do that now. */
12100 finish_destructor_body (void)
12104 /* Any return from a destructor will end up here; that way all base
12105 and member cleanups will be run when the function returns. */
12106 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
12108 /* In a virtual destructor, we must call delete. */
12109 if (DECL_VIRTUAL_P (current_function_decl))
12112 tree virtual_size = cxx_sizeof (current_class_type);
12116 At the point of definition of a virtual destructor (including
12117 an implicit definition), non-placement operator delete shall
12118 be looked up in the scope of the destructor's class and if
12119 found shall be accessible and unambiguous. */
12120 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12122 /*global_p=*/false,
12123 /*placement=*/NULL_TREE,
12124 /*alloc_fn=*/NULL_TREE);
12126 if_stmt = begin_if_stmt ();
12127 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12128 current_in_charge_parm,
12131 finish_expr_stmt (exprstmt);
12132 finish_then_clause (if_stmt);
12133 finish_if_stmt (if_stmt);
12136 if (targetm.cxx.cdtor_returns_this ())
12140 val = DECL_ARGUMENTS (current_function_decl);
12141 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12142 DECL_RESULT (current_function_decl), val);
12143 /* Return the address of the object. */
12144 exprstmt = build_stmt (RETURN_EXPR, val);
12145 add_stmt (exprstmt);
12149 /* Do the necessary processing for the beginning of a function body, which
12150 in this case includes member-initializers, but not the catch clauses of
12151 a function-try-block. Currently, this means opening a binding level
12152 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12155 begin_function_body (void)
12159 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12162 if (processing_template_decl)
12163 /* Do nothing now. */;
12165 /* Always keep the BLOCK node associated with the outermost pair of
12166 curly braces of a function. These are needed for correct
12167 operation of dwarfout.c. */
12168 keep_next_level (true);
12170 stmt = begin_compound_stmt (BCS_FN_BODY);
12172 if (processing_template_decl)
12173 /* Do nothing now. */;
12174 else if (DECL_DESTRUCTOR_P (current_function_decl))
12175 begin_destructor_body ();
12180 /* Do the processing for the end of a function body. Currently, this means
12181 closing out the cleanups for fully-constructed bases and members, and in
12182 the case of the destructor, deleting the object if desired. Again, this
12183 is only meaningful for [cd]tors, since they are the only functions where
12184 there is a significant distinction between the main body and any
12185 function catch clauses. Handling, say, main() return semantics here
12186 would be wrong, as flowing off the end of a function catch clause for
12187 main() would also need to return 0. */
12190 finish_function_body (tree compstmt)
12192 if (compstmt == NULL_TREE)
12195 /* Close the block. */
12196 finish_compound_stmt (compstmt);
12198 if (processing_template_decl)
12199 /* Do nothing now. */;
12200 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12201 finish_constructor_body ();
12202 else if (DECL_DESTRUCTOR_P (current_function_decl))
12203 finish_destructor_body ();
12206 /* Given a function, returns the BLOCK corresponding to the outermost level
12207 of curly braces, skipping the artificial block created for constructor
12211 outer_curly_brace_block (tree fndecl)
12213 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12214 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12215 /* Skip the artificial function body block. */
12216 block = BLOCK_SUBBLOCKS (block);
12220 /* Finish up a function declaration and compile that function
12221 all the way to assembler language output. The free the storage
12222 for the function definition.
12224 FLAGS is a bitwise or of the following values:
12226 We just finished processing the body of an in-class inline
12227 function definition. (This processing will have taken place
12228 after the class definition is complete.) */
12231 finish_function (int flags)
12233 tree fndecl = current_function_decl;
12234 tree fntype, ctype = NULL_TREE;
12235 int inclass_inline = (flags & 2) != 0;
12238 /* When we get some parse errors, we can end up without a
12239 current_function_decl, so cope. */
12240 if (fndecl == NULL_TREE)
12241 return error_mark_node;
12243 gcc_assert (!defer_mark_used_calls);
12244 defer_mark_used_calls = true;
12246 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12247 && DECL_VIRTUAL_P (fndecl)
12248 && !processing_template_decl)
12250 tree fnclass = DECL_CONTEXT (fndecl);
12251 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12252 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12255 nested = function_depth > 1;
12256 fntype = TREE_TYPE (fndecl);
12258 /* TREE_READONLY (fndecl) = 1;
12259 This caused &foo to be of type ptr-to-const-function
12260 which then got a warning when stored in a ptr-to-function variable. */
12262 gcc_assert (building_stmt_tree ());
12263 /* The current function is being defined, so its DECL_INITIAL should
12264 be set, and unless there's a multiple definition, it should be
12265 error_mark_node. */
12266 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12268 /* For a cloned function, we've already got all the code we need;
12269 there's no need to add any extra bits. */
12270 if (!DECL_CLONED_FUNCTION_P (fndecl))
12272 if (DECL_MAIN_P (current_function_decl))
12276 /* Make it so that `main' always returns 0 by default (or
12279 stmt = finish_return_stmt (integer_one_node);
12281 stmt = finish_return_stmt (integer_zero_node);
12283 /* Hack. We don't want the middle-end to warn that this
12284 return is unreachable, so put the statement on the
12287 location_t linezero = linemap_line_start (line_table, 0, 1);
12288 SET_EXPR_LOCATION (stmt, linezero);
12292 if (use_eh_spec_block (current_function_decl))
12293 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12294 (TREE_TYPE (current_function_decl)),
12295 current_eh_spec_block);
12298 /* If we're saving up tree structure, tie off the function now. */
12299 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12301 finish_fname_decls ();
12303 /* If this function can't throw any exceptions, remember that. */
12304 if (!processing_template_decl
12305 && !cp_function_chain->can_throw
12306 && !flag_non_call_exceptions
12307 && !DECL_REPLACEABLE_P (fndecl))
12308 TREE_NOTHROW (fndecl) = 1;
12310 /* This must come after expand_function_end because cleanups might
12311 have declarations (from inline functions) that need to go into
12312 this function's blocks. */
12314 /* If the current binding level isn't the outermost binding level
12315 for this function, either there is a bug, or we have experienced
12316 syntax errors and the statement tree is malformed. */
12317 if (current_binding_level->kind != sk_function_parms)
12319 /* Make sure we have already experienced errors. */
12320 gcc_assert (errorcount);
12322 /* Throw away the broken statement tree and extra binding
12324 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12326 while (current_binding_level->kind != sk_function_parms)
12328 if (current_binding_level->kind == sk_class)
12329 pop_nested_class ();
12331 poplevel (0, 0, 0);
12334 poplevel (1, 0, 1);
12336 /* Statements should always be full-expressions at the outermost set
12337 of curly braces for a function. */
12338 gcc_assert (stmts_are_full_exprs_p ());
12340 /* Set up the named return value optimization, if we can. Candidate
12341 variables are selected in check_return_expr. */
12342 if (current_function_return_value)
12344 tree r = current_function_return_value;
12347 if (r != error_mark_node
12348 /* This is only worth doing for fns that return in memory--and
12349 simpler, since we don't have to worry about promoted modes. */
12350 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12351 /* Only allow this for variables declared in the outer scope of
12352 the function so we know that their lifetime always ends with a
12353 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12354 we were to do this optimization in tree-ssa. */
12355 && (outer = outer_curly_brace_block (fndecl))
12356 && chain_member (r, BLOCK_VARS (outer)))
12357 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12359 current_function_return_value = NULL_TREE;
12362 /* Remember that we were in class scope. */
12363 if (current_class_name)
12364 ctype = current_class_type;
12366 /* Must mark the RESULT_DECL as being in this function. */
12367 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12369 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12370 to the FUNCTION_DECL node itself. */
12371 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12373 /* Save away current state, if appropriate. */
12374 if (!processing_template_decl)
12375 save_function_data (fndecl);
12377 /* Complain if there's just no return statement. */
12378 if (warn_return_type
12379 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12380 && !dependent_type_p (TREE_TYPE (fntype))
12381 && !current_function_returns_value && !current_function_returns_null
12382 /* Don't complain if we abort or throw. */
12383 && !current_function_returns_abnormally
12384 /* Don't complain if we are declared noreturn. */
12385 && !TREE_THIS_VOLATILE (fndecl)
12386 && !DECL_NAME (DECL_RESULT (fndecl))
12387 && !TREE_NO_WARNING (fndecl)
12388 /* Structor return values (if any) are set by the compiler. */
12389 && !DECL_CONSTRUCTOR_P (fndecl)
12390 && !DECL_DESTRUCTOR_P (fndecl))
12392 warning (OPT_Wreturn_type,
12393 "no return statement in function returning non-void");
12394 TREE_NO_WARNING (fndecl) = 1;
12397 /* Store the end of the function, so that we get good line number
12398 info for the epilogue. */
12399 cfun->function_end_locus = input_location;
12401 /* Genericize before inlining. */
12402 if (!processing_template_decl)
12404 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12405 cp_genericize (fndecl);
12406 /* Clear out the bits we don't need. */
12407 f->x_current_class_ptr = NULL;
12408 f->x_current_class_ref = NULL;
12409 f->x_eh_spec_block = NULL;
12410 f->x_in_charge_parm = NULL;
12411 f->x_vtt_parm = NULL;
12412 f->x_return_value = NULL;
12413 f->bindings = NULL;
12414 f->extern_decl_map = NULL;
12416 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
12417 c_warn_unused_result (gimple_body (fndecl));
12419 /* Clear out the bits we don't need. */
12420 local_names = NULL;
12422 /* We're leaving the context of this function, so zap cfun. It's still in
12423 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12425 current_function_decl = NULL;
12427 /* If this is an in-class inline definition, we may have to pop the
12428 bindings for the template parameters that we added in
12429 maybe_begin_member_template_processing when start_function was
12431 if (inclass_inline)
12432 maybe_end_member_template_processing ();
12434 /* Leave the scope of the class. */
12436 pop_nested_class ();
12442 /* Let the error reporting routines know that we're outside a
12443 function. For a nested function, this value is used in
12444 cxx_pop_function_context and then reset via pop_function_context. */
12445 current_function_decl = NULL_TREE;
12447 defer_mark_used_calls = false;
12448 if (deferred_mark_used_calls)
12453 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12455 VEC_free (tree, gc, deferred_mark_used_calls);
12461 /* Create the FUNCTION_DECL for a function definition.
12462 DECLSPECS and DECLARATOR are the parts of the declaration;
12463 they describe the return type and the name of the function,
12464 but twisted together in a fashion that parallels the syntax of C.
12466 This function creates a binding context for the function body
12467 as well as setting up the FUNCTION_DECL in current_function_decl.
12469 Returns a FUNCTION_DECL on success.
12471 If the DECLARATOR is not suitable for a function (it defines a datum
12472 instead), we return 0, which tells yyparse to report a parse error.
12474 May return void_type_node indicating that this method is actually
12475 a friend. See grokfield for more details.
12477 Came here with a `.pushlevel' .
12479 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12480 CHANGES TO CODE IN `grokfield'. */
12483 start_method (cp_decl_specifier_seq *declspecs,
12484 const cp_declarator *declarator, tree attrlist)
12486 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12489 if (fndecl == error_mark_node)
12490 return error_mark_node;
12492 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12494 error ("invalid member function declaration");
12495 return error_mark_node;
12499 cplus_decl_attributes (&fndecl, attrlist, 0);
12501 /* Pass friends other than inline friend functions back. */
12502 if (fndecl == void_type_node)
12505 if (DECL_IN_AGGR_P (fndecl))
12507 if (DECL_CONTEXT (fndecl)
12508 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12509 error ("%qD is already defined in class %qT", fndecl,
12510 DECL_CONTEXT (fndecl));
12511 return error_mark_node;
12514 check_template_shadow (fndecl);
12516 DECL_DECLARED_INLINE_P (fndecl) = 1;
12517 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12519 /* We process method specializations in finish_struct_1. */
12520 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12522 fndecl = push_template_decl (fndecl);
12523 if (fndecl == error_mark_node)
12527 if (! DECL_FRIEND_P (fndecl))
12529 if (TREE_CHAIN (fndecl))
12531 fndecl = copy_node (fndecl);
12532 TREE_CHAIN (fndecl) = NULL_TREE;
12536 finish_decl (fndecl, NULL_TREE, NULL_TREE);
12538 /* Make a place for the parms. */
12539 begin_scope (sk_function_parms, fndecl);
12541 DECL_IN_AGGR_P (fndecl) = 1;
12545 /* Go through the motions of finishing a function definition.
12546 We don't compile this method until after the whole class has
12549 FINISH_METHOD must return something that looks as though it
12550 came from GROKFIELD (since we are defining a method, after all).
12552 This is called after parsing the body of the function definition.
12553 STMTS is the chain of statements that makes up the function body.
12555 DECL is the ..._DECL that `start_method' provided. */
12558 finish_method (tree decl)
12560 tree fndecl = decl;
12565 if (decl == void_type_node)
12568 old_initial = DECL_INITIAL (fndecl);
12570 /* Undo the level for the parms (from start_method).
12571 This is like poplevel, but it causes nothing to be
12572 saved. Saving information here confuses symbol-table
12573 output routines. Besides, this information will
12574 be correctly output when this method is actually
12577 /* Clear out the meanings of the local variables of this level;
12578 also record in each decl which block it belongs to. */
12580 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
12582 if (DECL_NAME (link) != NULL_TREE)
12583 pop_binding (DECL_NAME (link), link);
12584 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
12585 DECL_CONTEXT (link) = NULL_TREE;
12588 poplevel (0, 0, 0);
12590 DECL_INITIAL (fndecl) = old_initial;
12592 /* We used to check if the context of FNDECL was different from
12593 current_class_type as another way to get inside here. This didn't work
12594 for String.cc in libg++. */
12595 if (DECL_FRIEND_P (fndecl))
12597 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
12599 decl = void_type_node;
12606 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12607 we can lay it out later, when and if its type becomes complete. */
12610 maybe_register_incomplete_var (tree var)
12612 gcc_assert (TREE_CODE (var) == VAR_DECL);
12614 /* Keep track of variables with incomplete types. */
12615 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12616 && DECL_EXTERNAL (var))
12618 tree inner_type = TREE_TYPE (var);
12620 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12621 inner_type = TREE_TYPE (inner_type);
12622 inner_type = TYPE_MAIN_VARIANT (inner_type);
12624 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12625 /* RTTI TD entries are created while defining the type_info. */
12626 || (TYPE_LANG_SPECIFIC (inner_type)
12627 && TYPE_BEING_DEFINED (inner_type)))
12628 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12632 /* Called when a class type (given by TYPE) is defined. If there are
12633 any existing VAR_DECLs whose type has been completed by this
12634 declaration, update them now. */
12637 complete_vars (tree type)
12639 tree *list = &incomplete_vars;
12641 gcc_assert (CLASS_TYPE_P (type));
12644 if (same_type_p (type, TREE_PURPOSE (*list)))
12646 tree var = TREE_VALUE (*list);
12647 tree type = TREE_TYPE (var);
12648 /* Complete the type of the variable. The VAR_DECL itself
12649 will be laid out in expand_expr. */
12650 complete_type (type);
12651 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12652 /* Remove this entry from the list. */
12653 *list = TREE_CHAIN (*list);
12656 list = &TREE_CHAIN (*list);
12659 /* Check for pending declarations which may have abstract type. */
12660 complete_type_check_abstract (type);
12663 /* If DECL is of a type which needs a cleanup, build and return an
12664 expression to perform that cleanup here. Return NULL_TREE if no
12665 cleanup need be done. */
12668 cxx_maybe_build_cleanup (tree decl)
12674 /* Assume no cleanup is required. */
12675 cleanup = NULL_TREE;
12677 if (error_operand_p (decl))
12680 /* Handle "__attribute__((cleanup))". We run the cleanup function
12681 before the destructor since the destructor is what actually
12682 terminates the lifetime of the object. */
12683 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12690 /* Get the name specified by the user for the cleanup function. */
12691 id = TREE_VALUE (TREE_VALUE (attr));
12692 /* Look up the name to find the cleanup function to call. It is
12693 important to use lookup_name here because that is what is
12694 used in c-common.c:handle_cleanup_attribute when performing
12695 initial checks on the attribute. Note that those checks
12696 include ensuring that the function found is not an overloaded
12697 function, or an object with an overloaded call operator,
12698 etc.; we can rely on the fact that the function found is an
12699 ordinary FUNCTION_DECL. */
12700 fn = lookup_name (id);
12701 arg = build_address (decl);
12703 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12705 tf_warning_or_error);
12707 /* Handle ordinary C++ destructors. */
12708 type = TREE_TYPE (decl);
12709 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12711 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12712 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12713 && CLASSTYPE_VBASECLASSES (type));
12717 if (TREE_CODE (type) == ARRAY_TYPE)
12720 addr = build_address (decl);
12722 /* Optimize for space over speed here. */
12723 if (!has_vbases || flag_expensive_optimizations)
12724 flags |= LOOKUP_NONVIRTUAL;
12726 call = build_delete (TREE_TYPE (addr), addr,
12727 sfk_complete_destructor, flags, 0);
12729 cleanup = build_compound_expr (cleanup, call);
12737 /* When a stmt has been parsed, this function is called. */
12744 /* DECL was originally constructed as a non-static member function,
12745 but turned out to be static. Update it accordingly. */
12748 revert_static_member_fn (tree decl)
12751 tree function = TREE_TYPE (decl);
12752 tree args = TYPE_ARG_TYPES (function);
12754 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12755 != TYPE_UNQUALIFIED)
12756 error ("static member function %q#D declared with type qualifiers", decl);
12758 args = TREE_CHAIN (args);
12759 tmp = build_function_type (TREE_TYPE (function), args);
12760 tmp = build_qualified_type (tmp, cp_type_quals (function));
12761 tmp = build_exception_variant (tmp,
12762 TYPE_RAISES_EXCEPTIONS (function));
12763 TREE_TYPE (decl) = tmp;
12764 if (DECL_ARGUMENTS (decl))
12765 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12766 DECL_STATIC_FUNCTION_P (decl) = 1;
12769 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12770 one of the language-independent trees. */
12772 enum cp_tree_node_structure_enum
12773 cp_tree_node_structure (union lang_tree_node * t)
12775 switch (TREE_CODE (&t->generic))
12777 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12778 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12779 case OVERLOAD: return TS_CP_OVERLOAD;
12780 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12781 case PTRMEM_CST: return TS_CP_PTRMEM;
12782 case BASELINK: return TS_CP_BASELINK;
12783 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12784 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12785 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12786 default: return TS_CP_GENERIC;
12790 /* Build the void_list_node (void_type_node having been created). */
12792 build_void_list_node (void)
12794 tree t = build_tree_list (NULL_TREE, void_type_node);
12799 cp_missing_noreturn_ok_p (tree decl)
12801 /* A missing noreturn is ok for the `main' function. */
12802 return DECL_MAIN_P (decl);
12805 /* Return the COMDAT group into which DECL should be placed. */
12808 cxx_comdat_group (tree decl)
12812 /* Virtual tables, construction virtual tables, and virtual table
12813 tables all go in a single COMDAT group, named after the primary
12815 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12816 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12817 /* For all other DECLs, the COMDAT group is the mangled name of the
12818 declaration itself. */
12821 while (DECL_THUNK_P (decl))
12823 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12824 into the same section as the target function. In that case
12825 we must return target's name. */
12826 tree target = THUNK_TARGET (decl);
12827 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12828 && DECL_SECTION_NAME (target) != NULL
12829 && DECL_ONE_ONLY (target))
12834 name = DECL_ASSEMBLER_NAME (decl);
12837 return IDENTIFIER_POINTER (name);
12840 #include "gt-cp-decl.h"