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)
7138 arg_types = TYPE_ARG_TYPES (member_type);
7139 class_type = (cp_build_qualified_type
7141 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
7143 = build_method_type_directly (class_type,
7144 TREE_TYPE (member_type),
7145 TREE_CHAIN (arg_types));
7146 return build_ptrmemfunc_type (build_pointer_type (member_type));
7150 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7151 return build_offset_type (class_type, member_type);
7155 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7156 Check to see that the definition is valid. Issue appropriate error
7157 messages. Return 1 if the definition is particularly bad, or 0
7161 check_static_variable_definition (tree decl, tree type)
7163 /* Motion 10 at San Diego: If a static const integral data member is
7164 initialized with an integral constant expression, the initializer
7165 may appear either in the declaration (within the class), or in
7166 the definition, but not both. If it appears in the class, the
7167 member is a member constant. The file-scope definition is always
7169 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7171 error ("invalid in-class initialization of static data member "
7172 "of non-integral type %qT",
7174 /* If we just return the declaration, crashes will sometimes
7175 occur. We therefore return void_type_node, as if this were a
7176 friend declaration, to cause callers to completely ignore
7177 this declaration. */
7180 else if (!CP_TYPE_CONST_P (type))
7181 error ("ISO C++ forbids in-class initialization of non-const "
7182 "static member %qD",
7184 else if (!INTEGRAL_TYPE_P (type))
7185 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7186 "%qD of non-integral type %qT", decl, type);
7191 /* Given the SIZE (i.e., number of elements) in an array, compute an
7192 appropriate index type for the array. If non-NULL, NAME is the
7193 name of the thing being declared. */
7196 compute_array_index_type (tree name, tree size)
7200 tree abi_1_itype = NULL_TREE;
7202 if (error_operand_p (size))
7203 return error_mark_node;
7205 type = TREE_TYPE (size);
7206 /* The array bound must be an integer type. */
7207 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
7210 error ("size of array %qD has non-integral type %qT", name, type);
7212 error ("size of array has non-integral type %qT", type);
7213 size = integer_one_node;
7214 type = TREE_TYPE (size);
7217 /* We can only call value_dependent_expression_p on integral constant
7218 expressions; the parser adds a dummy NOP_EXPR with TREE_SIDE_EFFECTS
7219 set if this isn't one. */
7220 if (processing_template_decl
7221 && (TREE_SIDE_EFFECTS (size) || value_dependent_expression_p (size)))
7223 /* We cannot do any checking for a SIZE that isn't known to be
7224 constant. Just build the index type and mark that it requires
7225 structural equality checks. */
7226 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7227 size, integer_one_node));
7228 if (!TREE_SIDE_EFFECTS (size))
7230 TYPE_DEPENDENT_P (itype) = 1;
7231 TYPE_DEPENDENT_P_VALID (itype) = 1;
7233 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7237 if (!abi_version_at_least (2) && processing_template_decl)
7238 /* For abi-1, we handled all instances in templates the same way,
7239 even when they were non-dependent. This affects the manglings
7240 produced. So, we do the normal checking for non-dependent
7241 sizes, but at the end we'll return the same type that abi-1
7242 would have, but with TYPE_CANONICAL set to the "right"
7243 value that the current ABI would provide. */
7244 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7245 size, integer_one_node));
7247 /* The size might be the result of a cast. */
7248 STRIP_TYPE_NOPS (size);
7250 /* It might be a const variable or enumeration constant. */
7251 size = integral_constant_value (size);
7253 /* Normally, the array-bound will be a constant. */
7254 if (TREE_CODE (size) == INTEGER_CST)
7256 /* Check to see if the array bound overflowed. Make that an
7257 error, no matter how generous we're being. */
7258 constant_expression_error (size);
7260 /* An array must have a positive number of elements. */
7261 if (INT_CST_LT (size, integer_zero_node))
7264 error ("size of array %qD is negative", name);
7266 error ("size of array is negative");
7267 size = integer_one_node;
7269 /* As an extension we allow zero-sized arrays. We always allow
7270 them in system headers because glibc uses them. */
7271 else if (integer_zerop (size) && !in_system_header)
7274 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7276 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7279 else if (TREE_CONSTANT (size))
7281 /* `(int) &fn' is not a valid array bound. */
7283 error ("size of array %qD is not an integral constant-expression",
7286 error ("size of array is not an integral constant-expression");
7287 size = integer_one_node;
7289 else if (pedantic && warn_vla != 0)
7292 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7294 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7296 else if (warn_vla > 0)
7300 "variable length array %qD is used", name);
7303 "variable length array is used");
7306 if (processing_template_decl && !TREE_CONSTANT (size))
7307 /* A variable sized array. */
7308 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7311 HOST_WIDE_INT saved_processing_template_decl;
7313 /* Compute the index of the largest element in the array. It is
7314 one less than the number of elements in the array. We save
7315 and restore PROCESSING_TEMPLATE_DECL so that computations in
7316 cp_build_binary_op will be appropriately folded. */
7317 saved_processing_template_decl = processing_template_decl;
7318 processing_template_decl = 0;
7319 itype = cp_build_binary_op (input_location,
7321 cp_convert (ssizetype, size),
7322 cp_convert (ssizetype, integer_one_node),
7323 tf_warning_or_error);
7324 itype = fold (itype);
7325 processing_template_decl = saved_processing_template_decl;
7327 if (!TREE_CONSTANT (itype))
7328 /* A variable sized array. */
7329 itype = variable_size (itype);
7330 /* Make sure that there was no overflow when creating to a signed
7331 index type. (For example, on a 32-bit machine, an array with
7332 size 2^32 - 1 is too big.) */
7333 else if (TREE_CODE (itype) == INTEGER_CST
7334 && TREE_OVERFLOW (itype))
7336 error ("overflow in array dimension");
7337 TREE_OVERFLOW (itype) = 0;
7341 /* Create and return the appropriate index type. */
7344 tree t = build_index_type (itype);
7345 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7349 return build_index_type (itype);
7352 /* Returns the scope (if any) in which the entity declared by
7353 DECLARATOR will be located. If the entity was declared with an
7354 unqualified name, NULL_TREE is returned. */
7357 get_scope_of_declarator (const cp_declarator *declarator)
7359 while (declarator && declarator->kind != cdk_id)
7360 declarator = declarator->declarator;
7362 /* If the declarator-id is a SCOPE_REF, the scope in which the
7363 declaration occurs is the first operand. */
7365 && declarator->u.id.qualifying_scope)
7366 return declarator->u.id.qualifying_scope;
7368 /* Otherwise, the declarator is not a qualified name; the entity will
7369 be declared in the current scope. */
7373 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7374 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7378 create_array_type_for_decl (tree name, tree type, tree size)
7380 tree itype = NULL_TREE;
7381 const char* error_msg;
7383 /* If things have already gone awry, bail now. */
7384 if (type == error_mark_node || size == error_mark_node)
7385 return error_mark_node;
7387 /* Assume that everything will go OK. */
7390 /* There are some types which cannot be array elements. */
7391 switch (TREE_CODE (type))
7394 error_msg = "array of void";
7398 error_msg = "array of functions";
7401 case REFERENCE_TYPE:
7402 error_msg = "array of references";
7406 error_msg = "array of function members";
7413 /* If something went wrong, issue an error-message and return. */
7417 error ("declaration of %qD as %s", name, error_msg);
7419 error ("creating %s", error_msg);
7421 return error_mark_node;
7426 The constant expressions that specify the bounds of the arrays
7427 can be omitted only for the first member of the sequence. */
7428 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7431 error ("declaration of %qD as multidimensional array must "
7432 "have bounds for all dimensions except the first",
7435 error ("multidimensional array must have bounds for all "
7436 "dimensions except the first");
7438 return error_mark_node;
7441 /* Figure out the index type for the array. */
7443 itype = compute_array_index_type (name, size);
7446 T is called the array element type; this type shall not be [...] an
7447 abstract class type. */
7448 abstract_virtuals_error (name, type);
7450 return build_cplus_array_type (type, itype);
7453 /* Check that it's OK to declare a function with the indicated TYPE.
7454 SFK indicates the kind of special function (if any) that this
7455 function is. OPTYPE is the type given in a conversion operator
7456 declaration, or the class type for a constructor/destructor.
7457 Returns the actual return type of the function; that
7458 may be different than TYPE if an error occurs, or for certain
7459 special functions. */
7462 check_special_function_return_type (special_function_kind sfk,
7468 case sfk_constructor:
7470 error ("return type specification for constructor invalid");
7472 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7473 type = build_pointer_type (optype);
7475 type = void_type_node;
7478 case sfk_destructor:
7480 error ("return type specification for destructor invalid");
7481 /* We can't use the proper return type here because we run into
7482 problems with ambiguous bases and covariant returns.
7483 Java classes are left unchanged because (void *) isn't a valid
7484 Java type, and we don't want to change the Java ABI. */
7485 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7486 type = build_pointer_type (void_type_node);
7488 type = void_type_node;
7491 case sfk_conversion:
7493 error ("return type specified for %<operator %T%>", optype);
7504 /* A variable or data member (whose unqualified name is IDENTIFIER)
7505 has been declared with the indicated TYPE. If the TYPE is not
7506 acceptable, issue an error message and return a type to use for
7507 error-recovery purposes. */
7510 check_var_type (tree identifier, tree type)
7512 if (VOID_TYPE_P (type))
7515 error ("unnamed variable or field declared void");
7516 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
7518 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
7519 error ("variable or field %qE declared void", identifier);
7522 error ("variable or field declared void");
7523 type = error_mark_node;
7529 /* Given declspecs and a declarator (abstract or otherwise), determine
7530 the name and type of the object declared and construct a DECL node
7533 DECLSPECS points to the representation of declaration-specifier
7534 sequence that precedes declarator.
7536 DECL_CONTEXT says which syntactic context this declaration is in:
7537 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
7538 FUNCDEF for a function definition. Like NORMAL but a few different
7539 error messages in each case. Return value may be zero meaning
7540 this definition is too screwy to try to parse.
7541 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
7542 handle member functions (which have FIELD context).
7543 Return value may be zero meaning this definition is too screwy to
7545 PARM for a parameter declaration (either within a function prototype
7546 or before a function body). Make a PARM_DECL, or return void_type_node.
7547 CATCHPARM for a parameter declaration before a catch clause.
7548 TYPENAME if for a typename (in a cast or sizeof).
7549 Don't make a DECL node; just return the ..._TYPE node.
7550 FIELD for a struct or union field; make a FIELD_DECL.
7551 BITFIELD for a field with specified width.
7552 INITIALIZED is as for start_decl.
7554 ATTRLIST is a pointer to the list of attributes, which may be NULL
7555 if there are none; *ATTRLIST may be modified if attributes from inside
7556 the declarator should be applied to the declaration.
7558 When this function is called, scoping variables (such as
7559 CURRENT_CLASS_TYPE) should reflect the scope in which the
7560 declaration occurs, not the scope in which the new declaration will
7561 be placed. For example, on:
7565 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
7568 Returns a DECL (if a declarator is present), a TYPE (if there is no
7569 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
7573 grokdeclarator (const cp_declarator *declarator,
7574 const cp_decl_specifier_seq *declspecs,
7575 enum decl_context decl_context,
7579 tree type = NULL_TREE;
7581 int virtualp, explicitp, friendp, inlinep, staticp;
7582 int explicit_int = 0;
7583 int explicit_char = 0;
7584 int defaulted_int = 0;
7585 tree dependent_name = NULL_TREE;
7587 tree typedef_decl = NULL_TREE;
7588 const char *name = NULL;
7589 tree typedef_type = NULL_TREE;
7590 /* True if this declarator is a function definition. */
7591 bool funcdef_flag = false;
7592 cp_declarator_kind innermost_code = cdk_error;
7595 /* See the code below that used this. */
7596 tree decl_attr = NULL_TREE;
7599 /* Keep track of what sort of function is being processed
7600 so that we can warn about default return values, or explicit
7601 return values which do not match prescribed defaults. */
7602 special_function_kind sfk = sfk_none;
7604 tree dname = NULL_TREE;
7605 tree ctor_return_type = NULL_TREE;
7606 enum overload_flags flags = NO_SPECIAL;
7607 /* cv-qualifiers that apply to the declarator, for a declaration of
7608 a member function. */
7609 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
7610 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
7612 tree raises = NULL_TREE;
7613 int template_count = 0;
7614 tree returned_attrs = NULL_TREE;
7615 tree parms = NULL_TREE;
7616 const cp_declarator *id_declarator;
7617 /* The unqualified name of the declarator; either an
7618 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
7619 tree unqualified_id;
7620 /* The class type, if any, in which this entity is located,
7621 or NULL_TREE if none. Note that this value may be different from
7622 the current class type; for example if an attempt is made to declare
7623 "A::f" inside "B", this value will be "A". */
7624 tree ctype = current_class_type;
7625 /* The NAMESPACE_DECL for the namespace in which this entity is
7626 located. If an unqualified name is used to declare the entity,
7627 this value will be NULL_TREE, even if the entity is located at
7629 tree in_namespace = NULL_TREE;
7630 cp_storage_class storage_class;
7631 bool unsigned_p, signed_p, short_p, long_p, thread_p;
7632 bool type_was_error_mark_node = false;
7633 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
7634 bool template_type_arg = false;
7636 signed_p = declspecs->specs[(int)ds_signed];
7637 unsigned_p = declspecs->specs[(int)ds_unsigned];
7638 short_p = declspecs->specs[(int)ds_short];
7639 long_p = declspecs->specs[(int)ds_long];
7640 longlong = declspecs->specs[(int)ds_long] >= 2;
7641 thread_p = declspecs->specs[(int)ds_thread];
7643 if (decl_context == FUNCDEF)
7644 funcdef_flag = true, decl_context = NORMAL;
7645 else if (decl_context == MEMFUNCDEF)
7646 funcdef_flag = true, decl_context = FIELD;
7647 else if (decl_context == BITFIELD)
7648 bitfield = 1, decl_context = FIELD;
7649 else if (decl_context == TEMPLATE_TYPE_ARG)
7650 template_type_arg = true, decl_context = TYPENAME;
7652 if (initialized > 1)
7653 funcdef_flag = true;
7655 /* Look inside a declarator for the name being declared
7656 and get it as a string, for an error message. */
7657 for (id_declarator = declarator;
7659 id_declarator = id_declarator->declarator)
7661 if (id_declarator->kind != cdk_id)
7662 innermost_code = id_declarator->kind;
7664 switch (id_declarator->kind)
7667 if (id_declarator->declarator
7668 && id_declarator->declarator->kind == cdk_id)
7670 sfk = id_declarator->declarator->u.id.sfk;
7671 if (sfk == sfk_destructor)
7678 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
7679 tree decl = id_declarator->u.id.unqualified_name;
7682 if (qualifying_scope)
7684 if (at_function_scope_p ())
7688 A declarator-id shall not be qualified except
7691 None of the cases are permitted in block
7693 if (qualifying_scope == global_namespace)
7694 error ("invalid use of qualified-name %<::%D%>",
7696 else if (TYPE_P (qualifying_scope))
7697 error ("invalid use of qualified-name %<%T::%D%>",
7698 qualifying_scope, decl);
7700 error ("invalid use of qualified-name %<%D::%D%>",
7701 qualifying_scope, decl);
7702 return error_mark_node;
7704 else if (TYPE_P (qualifying_scope))
7706 ctype = qualifying_scope;
7707 if (innermost_code != cdk_function
7708 && current_class_type
7709 && !UNIQUELY_DERIVED_FROM_P (ctype,
7710 current_class_type))
7712 error ("type %qT is not derived from type %qT",
7713 ctype, current_class_type);
7714 return error_mark_node;
7717 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
7718 in_namespace = qualifying_scope;
7720 switch (TREE_CODE (decl))
7726 if (innermost_code != cdk_function)
7728 error ("declaration of %qD as non-function", decl);
7729 return error_mark_node;
7731 else if (!qualifying_scope
7732 && !(current_class_type && at_class_scope_p ()))
7734 error ("declaration of %qD as non-member", decl);
7735 return error_mark_node;
7738 type = TREE_OPERAND (decl, 0);
7740 type = constructor_name (type);
7741 name = IDENTIFIER_POINTER (type);
7746 case TEMPLATE_ID_EXPR:
7748 tree fns = TREE_OPERAND (decl, 0);
7751 if (TREE_CODE (dname) != IDENTIFIER_NODE)
7753 gcc_assert (is_overloaded_fn (dname));
7754 dname = DECL_NAME (get_first_fn (dname));
7759 case IDENTIFIER_NODE:
7760 if (TREE_CODE (decl) == IDENTIFIER_NODE)
7763 if (C_IS_RESERVED_WORD (dname))
7765 error ("declarator-id missing; using reserved word %qD",
7767 name = IDENTIFIER_POINTER (dname);
7769 else if (!IDENTIFIER_TYPENAME_P (dname))
7770 name = IDENTIFIER_POINTER (dname);
7773 gcc_assert (flags == NO_SPECIAL);
7774 flags = TYPENAME_FLAG;
7775 ctor_return_type = TREE_TYPE (dname);
7776 sfk = sfk_conversion;
7777 if (is_typename_at_global_scope (dname))
7778 name = IDENTIFIER_POINTER (dname);
7780 name = "<invalid operator>";
7797 return error_mark_node;
7802 if (id_declarator->kind == cdk_id)
7808 The declarator in a function-definition shall have the form
7809 D1 ( parameter-declaration-clause) ... */
7810 if (funcdef_flag && innermost_code != cdk_function)
7812 error ("function definition does not declare parameters");
7813 return error_mark_node;
7816 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
7817 && innermost_code != cdk_function
7818 && ! (ctype && !declspecs->any_specifiers_p))
7820 error ("declaration of %qD as non-function", dname);
7821 return error_mark_node;
7824 /* Anything declared one level down from the top level
7825 must be one of the parameters of a function
7826 (because the body is at least two levels down). */
7828 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
7829 by not allowing C++ class definitions to specify their parameters
7830 with xdecls (must be spec.d in the parmlist).
7832 Since we now wait to push a class scope until we are sure that
7833 we are in a legitimate method context, we must set oldcname
7834 explicitly (since current_class_name is not yet alive).
7836 We also want to avoid calling this a PARM if it is in a namespace. */
7838 if (decl_context == NORMAL && !toplevel_bindings_p ())
7840 struct cp_binding_level *b = current_binding_level;
7841 current_binding_level = b->level_chain;
7842 if (current_binding_level != 0 && toplevel_bindings_p ())
7843 decl_context = PARM;
7844 current_binding_level = b;
7848 name = decl_context == PARM ? "parameter" : "type name";
7850 /* If there were multiple types specified in the decl-specifier-seq,
7851 issue an error message. */
7852 if (declspecs->multiple_types_p)
7854 error ("two or more data types in declaration of %qs", name);
7855 return error_mark_node;
7858 if (declspecs->conflicting_specifiers_p)
7860 error ("conflicting specifiers in declaration of %qs", name);
7861 return error_mark_node;
7864 /* Extract the basic type from the decl-specifier-seq. */
7865 type = declspecs->type;
7866 if (type == error_mark_node)
7869 type_was_error_mark_node = true;
7871 /* If the entire declaration is itself tagged as deprecated then
7872 suppress reports of deprecated items. */
7873 if (type && TREE_DEPRECATED (type)
7874 && deprecated_state != DEPRECATED_SUPPRESS)
7875 warn_deprecated_use (type);
7876 if (type && TREE_CODE (type) == TYPE_DECL)
7878 typedef_decl = type;
7879 type = TREE_TYPE (typedef_decl);
7880 if (TREE_DEPRECATED (type)
7881 && DECL_ARTIFICIAL (typedef_decl)
7882 && deprecated_state != DEPRECATED_SUPPRESS)
7883 warn_deprecated_use (type);
7885 /* No type at all: default to `int', and set DEFAULTED_INT
7886 because it was not a user-defined typedef. */
7887 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
7889 /* These imply 'int'. */
7890 type = integer_type_node;
7894 explicit_int = declspecs->explicit_int_p;
7895 explicit_char = declspecs->explicit_char_p;
7898 /* See the code below that used this. */
7900 decl_attr = DECL_ATTRIBUTES (typedef_decl);
7902 typedef_type = type;
7905 if (sfk != sfk_conversion)
7906 ctor_return_type = ctype;
7908 if (sfk != sfk_none)
7909 type = check_special_function_return_type (sfk, type,
7911 else if (type == NULL_TREE)
7917 /* We handle `main' specially here, because 'main () { }' is so
7918 common. With no options, it is allowed. With -Wreturn-type,
7919 it is a warning. It is only an error with -pedantic-errors. */
7920 is_main = (funcdef_flag
7921 && dname && MAIN_NAME_P (dname)
7922 && ctype == NULL_TREE
7923 && in_namespace == NULL_TREE
7924 && current_namespace == global_namespace);
7926 if (type_was_error_mark_node)
7927 /* We've already issued an error, don't complain more. */;
7928 else if (in_system_header || flag_ms_extensions)
7929 /* Allow it, sigh. */;
7931 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
7933 pedwarn (input_location, OPT_pedantic,
7934 "ISO C++ forbids declaration of %qs with no type", name);
7936 warning (OPT_Wreturn_type,
7937 "ISO C++ forbids declaration of %qs with no type", name);
7939 type = integer_type_node;
7944 /* Now process the modifiers that were specified
7945 and check for invalid combinations. */
7947 /* Long double is a special combination. */
7948 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
7951 type = build_qualified_type (long_double_type_node,
7952 cp_type_quals (type));
7955 /* Check all other uses of type modifiers. */
7957 if (unsigned_p || signed_p || long_p || short_p)
7961 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
7962 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7963 else if (signed_p && unsigned_p)
7964 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
7965 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
7966 error ("%<long long%> invalid for %qs", name);
7967 else if (long_p && TREE_CODE (type) == REAL_TYPE)
7968 error ("%<long%> invalid for %qs", name);
7969 else if (short_p && TREE_CODE (type) == REAL_TYPE)
7970 error ("%<short%> invalid for %qs", name);
7971 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
7972 error ("%<long%> or %<short%> invalid for %qs", name);
7973 else if ((long_p || short_p) && explicit_char)
7974 error ("%<long%> or %<short%> specified with char for %qs", name);
7975 else if (long_p && short_p)
7976 error ("%<long%> and %<short%> specified together for %qs", name);
7977 else if (type == char16_type_node || type == char32_type_node)
7979 if (signed_p || unsigned_p)
7980 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
7981 else if (short_p || long_p)
7982 error ("%<short%> or %<long%> invalid for %qs", name);
7987 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
7989 pedwarn (input_location, OPT_pedantic,
7990 "long, short, signed or unsigned used invalidly for %qs",
7992 if (flag_pedantic_errors)
7997 /* Discard the type modifiers if they are invalid. */
8008 /* Decide whether an integer type is signed or not.
8009 Optionally treat bitfields as signed by default. */
8013 It is implementation-defined whether a plain (neither
8014 explicitly signed or unsigned) char, short, int, or long
8015 bit-field is signed or unsigned.
8017 Naturally, we extend this to long long as well. Note that
8018 this does not include wchar_t. */
8019 || (bitfield && !flag_signed_bitfields
8021 /* A typedef for plain `int' without `signed' can be
8022 controlled just like plain `int', but a typedef for
8023 `signed int' cannot be so controlled. */
8025 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8026 && TREE_CODE (type) == INTEGER_TYPE
8027 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8030 type = long_long_unsigned_type_node;
8032 type = long_unsigned_type_node;
8034 type = short_unsigned_type_node;
8035 else if (type == char_type_node)
8036 type = unsigned_char_type_node;
8037 else if (typedef_decl)
8038 type = unsigned_type_for (type);
8040 type = unsigned_type_node;
8042 else if (signed_p && type == char_type_node)
8043 type = signed_char_type_node;
8045 type = long_long_integer_type_node;
8047 type = long_integer_type_node;
8049 type = short_integer_type_node;
8051 if (declspecs->specs[(int)ds_complex])
8053 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8054 error ("complex invalid for %qs", name);
8055 /* If we just have "complex", it is equivalent to
8056 "complex double", but if any modifiers at all are specified it is
8057 the complex form of TYPE. E.g, "complex short" is
8058 "complex short int". */
8060 else if (defaulted_int && ! longlong
8061 && ! (long_p || short_p || signed_p || unsigned_p))
8062 type = complex_double_type_node;
8063 else if (type == integer_type_node)
8064 type = complex_integer_type_node;
8065 else if (type == float_type_node)
8066 type = complex_float_type_node;
8067 else if (type == double_type_node)
8068 type = complex_double_type_node;
8069 else if (type == long_double_type_node)
8070 type = complex_long_double_type_node;
8072 type = build_complex_type (type);
8075 type_quals = TYPE_UNQUALIFIED;
8076 if (declspecs->specs[(int)ds_const])
8077 type_quals |= TYPE_QUAL_CONST;
8078 if (declspecs->specs[(int)ds_volatile])
8079 type_quals |= TYPE_QUAL_VOLATILE;
8080 if (declspecs->specs[(int)ds_restrict])
8081 type_quals |= TYPE_QUAL_RESTRICT;
8082 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8083 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8086 if (TREE_CODE (type) == FUNCTION_TYPE
8087 && type_quals != TYPE_UNQUALIFIED)
8089 /* This was an error in C++98 (cv-qualifiers cannot be added to
8090 a function type), but DR 295 makes the code well-formed by
8091 dropping the extra qualifiers. */
8094 tree bad_type = build_qualified_type (type, type_quals);
8095 pedwarn (input_location, OPT_pedantic,
8096 "ignoring %qV qualifiers added to function type %qT",
8099 type_quals = TYPE_UNQUALIFIED;
8101 type_quals |= cp_type_quals (type);
8102 type = cp_build_qualified_type_real
8103 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8104 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8105 /* We might have ignored or rejected some of the qualifiers. */
8106 type_quals = cp_type_quals (type);
8109 inlinep = !! declspecs->specs[(int)ds_inline];
8110 virtualp = !! declspecs->specs[(int)ds_virtual];
8111 explicitp = !! declspecs->specs[(int)ds_explicit];
8113 storage_class = declspecs->storage_class;
8114 if (storage_class == sc_static)
8115 staticp = 1 + (decl_context == FIELD);
8117 if (virtualp && staticp == 2)
8119 error ("member %qD cannot be declared both virtual and static", dname);
8120 storage_class = sc_none;
8123 friendp = !! declspecs->specs[(int)ds_friend];
8125 if (dependent_name && !friendp)
8127 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8128 return error_mark_node;
8131 /* Issue errors about use of storage classes for parameters. */
8132 if (decl_context == PARM)
8134 if (declspecs->specs[(int)ds_typedef])
8136 error ("typedef declaration invalid in parameter declaration");
8137 return error_mark_node;
8139 else if (storage_class == sc_static
8140 || storage_class == sc_extern
8142 error ("storage class specifiers invalid in parameter declarations");
8144 if (type_uses_auto (type))
8146 error ("parameter declared %<auto%>");
8147 type = error_mark_node;
8151 /* Give error if `virtual' is used outside of class declaration. */
8153 && (current_class_name == NULL_TREE || decl_context != FIELD))
8155 error ("%<virtual%> outside class declaration");
8159 /* Static anonymous unions are dealt with here. */
8160 if (staticp && decl_context == TYPENAME
8162 && ANON_AGGR_TYPE_P (declspecs->type))
8163 decl_context = FIELD;
8165 /* Warn about storage classes that are invalid for certain
8166 kinds of declarations (parameters, typenames, etc.). */
8169 && storage_class != sc_extern
8170 && storage_class != sc_static)
8171 || declspecs->specs[(int)ds_typedef]))
8173 error ("multiple storage classes in declaration of %qs", name);
8176 if (decl_context != NORMAL
8177 && ((storage_class != sc_none
8178 && storage_class != sc_mutable)
8181 if ((decl_context == PARM || decl_context == CATCHPARM)
8182 && (storage_class == sc_register
8183 || storage_class == sc_auto))
8185 else if (declspecs->specs[(int)ds_typedef])
8187 else if (decl_context == FIELD
8188 /* C++ allows static class elements. */
8189 && storage_class == sc_static)
8190 /* C++ also allows inlines and signed and unsigned elements,
8191 but in those cases we don't come in here. */
8195 if (decl_context == FIELD)
8196 error ("storage class specified for %qs", name);
8199 if (decl_context == PARM || decl_context == CATCHPARM)
8200 error ("storage class specified for parameter %qs", name);
8202 error ("storage class specified for typename");
8204 if (storage_class == sc_register
8205 || storage_class == sc_auto
8206 || storage_class == sc_extern
8208 storage_class = sc_none;
8211 else if (storage_class == sc_extern && funcdef_flag
8212 && ! toplevel_bindings_p ())
8213 error ("nested function %qs declared %<extern%>", name);
8214 else if (toplevel_bindings_p ())
8216 if (storage_class == sc_auto)
8217 error ("top-level declaration of %qs specifies %<auto%>", name);
8220 && storage_class != sc_extern
8221 && storage_class != sc_static)
8223 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8228 if (storage_class && friendp)
8230 error ("storage class specifiers invalid in friend function declarations");
8231 storage_class = sc_none;
8236 unqualified_id = NULL_TREE;
8239 unqualified_id = id_declarator->u.id.unqualified_name;
8240 switch (TREE_CODE (unqualified_id))
8243 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8244 if (TYPE_P (unqualified_id))
8245 unqualified_id = constructor_name (unqualified_id);
8248 case IDENTIFIER_NODE:
8249 case TEMPLATE_ID_EXPR:
8257 /* Determine the type of the entity declared by recurring on the
8259 for (; declarator; declarator = declarator->declarator)
8261 const cp_declarator *inner_declarator;
8264 if (type == error_mark_node)
8265 return error_mark_node;
8267 attrs = declarator->attributes;
8273 if (declarator == NULL || declarator->kind == cdk_id)
8274 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8275 if (declarator->kind == cdk_function)
8276 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8277 if (declarator->kind == cdk_array)
8278 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8279 returned_attrs = decl_attributes (&type,
8280 chainon (returned_attrs, attrs),
8284 if (declarator->kind == cdk_id)
8287 inner_declarator = declarator->declarator;
8289 switch (declarator->kind)
8292 type = create_array_type_for_decl (dname, type,
8293 declarator->u.array.bounds);
8301 /* Declaring a function type.
8302 Make sure we have a valid type for the function to return. */
8304 if (type_quals != TYPE_UNQUALIFIED)
8306 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8307 warning (OPT_Wignored_qualifiers,
8308 "type qualifiers ignored on function return type");
8309 /* We now know that the TYPE_QUALS don't apply to the
8310 decl, but to its return type. */
8311 type_quals = TYPE_UNQUALIFIED;
8314 /* Error about some types functions can't return. */
8316 if (TREE_CODE (type) == FUNCTION_TYPE)
8318 error ("%qs declared as function returning a function", name);
8319 return error_mark_node;
8321 if (TREE_CODE (type) == ARRAY_TYPE)
8323 error ("%qs declared as function returning an array", name);
8324 return error_mark_node;
8327 /* Pick up type qualifiers which should be applied to `this'. */
8328 memfn_quals = declarator->u.function.qualifiers;
8330 /* Pick up the exception specifications. */
8331 raises = declarator->u.function.exception_specification;
8333 /* Say it's a definition only for the CALL_EXPR
8334 closest to the identifier. */
8335 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8337 /* Handle a late-specified return type. */
8340 if (type_uses_auto (type))
8342 if (!declarator->u.function.late_return_type)
8344 error ("%qs function uses %<auto%> type specifier without"
8345 " late return type", name);
8346 return error_mark_node;
8348 else if (!is_auto (type))
8350 error ("%qs function with late return type has"
8351 " %qT as its type rather than plain %<auto%>",
8353 return error_mark_node;
8356 else if (declarator->u.function.late_return_type)
8358 error ("%qs function with late return type not declared"
8359 " with %<auto%> type specifier", name);
8360 return error_mark_node;
8363 type = splice_late_return_type
8364 (type, declarator->u.function.late_return_type);
8365 if (type == error_mark_node)
8366 return error_mark_node;
8368 if (ctype == NULL_TREE
8369 && decl_context == FIELD
8371 && (friendp == 0 || dname == current_class_name))
8372 ctype = current_class_type;
8374 if (ctype && (sfk == sfk_constructor
8375 || sfk == sfk_destructor))
8377 /* We are within a class's scope. If our declarator name
8378 is the same as the class name, and we are defining
8379 a function, then it is a constructor/destructor, and
8380 therefore returns a void type. */
8382 /* ISO C++ 12.4/2. A destructor may not be declared
8383 const or volatile. A destructor may not be
8386 ISO C++ 12.1. A constructor may not be declared
8387 const or volatile. A constructor may not be
8388 virtual. A constructor may not be static. */
8390 error ((flags == DTOR_FLAG)
8391 ? "destructor cannot be static member function"
8392 : "constructor cannot be static member function");
8395 error ((flags == DTOR_FLAG)
8396 ? "destructors may not be cv-qualified"
8397 : "constructors may not be cv-qualified");
8398 memfn_quals = TYPE_UNQUALIFIED;
8401 if (decl_context == FIELD
8402 && !member_function_or_else (ctype,
8405 return error_mark_node;
8407 if (flags != DTOR_FLAG)
8409 /* It's a constructor. */
8414 permerror (input_location, "constructors cannot be declared virtual");
8417 if (decl_context == FIELD
8418 && sfk != sfk_constructor)
8419 return error_mark_node;
8421 if (decl_context == FIELD)
8427 error ("can't initialize friend function %qs", name);
8430 /* Cannot be both friend and virtual. */
8431 error ("virtual functions cannot be friends");
8434 if (decl_context == NORMAL)
8435 error ("friend declaration not in class definition");
8436 if (current_function_decl && funcdef_flag)
8437 error ("can't define friend function %qs in a local "
8442 arg_types = grokparms (declarator->u.function.parameters,
8445 if (inner_declarator
8446 && inner_declarator->kind == cdk_id
8447 && inner_declarator->u.id.sfk == sfk_destructor
8448 && arg_types != void_list_node)
8450 error ("destructors may not have parameters");
8451 arg_types = void_list_node;
8455 type = build_function_type (type, arg_types);
8462 /* Filter out pointers-to-references and references-to-references.
8463 We can get these if a TYPE_DECL is used. */
8465 if (TREE_CODE (type) == REFERENCE_TYPE)
8467 if (declarator->kind != cdk_reference)
8469 error ("cannot declare pointer to %q#T", type);
8470 type = TREE_TYPE (type);
8473 /* In C++0x, we allow reference to reference declarations
8474 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
8475 and template type arguments [14.3.1/4 temp.arg.type]. The
8476 check for direct reference to reference declarations, which
8477 are still forbidden, occurs below. Reasoning behind the change
8478 can be found in DR106, DR540, and the rvalue reference
8480 else if (cxx_dialect == cxx98)
8482 error ("cannot declare reference to %q#T", type);
8483 type = TREE_TYPE (type);
8486 else if (VOID_TYPE_P (type))
8488 if (declarator->kind == cdk_reference)
8489 error ("cannot declare reference to %q#T", type);
8490 else if (declarator->kind == cdk_ptrmem)
8491 error ("cannot declare pointer to %q#T member", type);
8494 /* We now know that the TYPE_QUALS don't apply to the decl,
8495 but to the target of the pointer. */
8496 type_quals = TYPE_UNQUALIFIED;
8498 if (declarator->kind == cdk_ptrmem
8499 && (TREE_CODE (type) == FUNCTION_TYPE
8500 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
8502 memfn_quals |= cp_type_quals (type);
8503 type = build_memfn_type (type,
8504 declarator->u.pointer.class_type,
8506 memfn_quals = TYPE_UNQUALIFIED;
8509 if (TREE_CODE (type) == FUNCTION_TYPE
8510 && cp_type_quals (type) != TYPE_UNQUALIFIED)
8511 error ("cannot declare %s to qualified function type %qT",
8512 declarator->kind == cdk_reference ? "reference" : "pointer",
8515 if (declarator->kind == cdk_reference)
8517 /* In C++0x, the type we are creating a reference to might be
8518 a typedef which is itself a reference type. In that case,
8519 we follow the reference collapsing rules in
8520 [7.1.3/8 dcl.typedef] to create the final reference type:
8522 "If a typedef TD names a type that is a reference to a type
8523 T, an attempt to create the type 'lvalue reference to cv TD'
8524 creates the type 'lvalue reference to T,' while an attempt
8525 to create the type "rvalue reference to cv TD' creates the
8528 if (!VOID_TYPE_P (type))
8529 type = cp_build_reference_type
8530 ((TREE_CODE (type) == REFERENCE_TYPE
8531 ? TREE_TYPE (type) : type),
8532 (declarator->u.reference.rvalue_ref
8533 && (TREE_CODE(type) != REFERENCE_TYPE
8534 || TYPE_REF_IS_RVALUE (type))));
8536 /* In C++0x, we need this check for direct reference to
8537 reference declarations, which are forbidden by
8538 [8.3.2/5 dcl.ref]. Reference to reference declarations
8539 are only allowed indirectly through typedefs and template
8540 type arguments. Example:
8542 void foo(int & &); // invalid ref-to-ref decl
8544 typedef int & int_ref;
8545 void foo(int_ref &); // valid ref-to-ref decl
8547 if (inner_declarator && inner_declarator->kind == cdk_reference)
8548 error ("cannot declare reference to %q#T, which is not "
8549 "a typedef or a template type argument", type);
8551 else if (TREE_CODE (type) == METHOD_TYPE)
8552 type = build_ptrmemfunc_type (build_pointer_type (type));
8553 else if (declarator->kind == cdk_ptrmem)
8555 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
8557 if (declarator->u.pointer.class_type == error_mark_node)
8558 /* We will already have complained. */
8559 type = error_mark_node;
8561 type = build_ptrmem_type (declarator->u.pointer.class_type,
8565 type = build_pointer_type (type);
8567 /* Process a list of type modifier keywords (such as
8568 const or volatile) that were given inside the `*' or `&'. */
8570 if (declarator->u.pointer.qualifiers)
8573 = cp_build_qualified_type (type,
8574 declarator->u.pointer.qualifiers);
8575 type_quals = cp_type_quals (type);
8588 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
8589 && TREE_CODE (type) != FUNCTION_TYPE
8590 && TREE_CODE (type) != METHOD_TYPE)
8592 error ("template-id %qD used as a declarator",
8594 unqualified_id = dname;
8597 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
8598 qualified with a class-name, turn it into a METHOD_TYPE, unless
8599 we know that the function is static. We take advantage of this
8600 opportunity to do other processing that pertains to entities
8601 explicitly declared to be class members. Note that if DECLARATOR
8602 is non-NULL, we know it is a cdk_id declarator; otherwise, we
8603 would not have exited the loop above. */
8605 && declarator->u.id.qualifying_scope
8606 && TYPE_P (declarator->u.id.qualifying_scope))
8610 ctype = declarator->u.id.qualifying_scope;
8611 ctype = TYPE_MAIN_VARIANT (ctype);
8613 while (t != NULL_TREE && CLASS_TYPE_P (t))
8615 /* You're supposed to have one `template <...>' for every
8616 template class, but you don't need one for a full
8617 specialization. For example:
8619 template <class T> struct S{};
8620 template <> struct S<int> { void f(); };
8621 void S<int>::f () {}
8623 is correct; there shouldn't be a `template <>' for the
8624 definition of `S<int>::f'. */
8625 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
8626 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
8627 /* T is an explicit (not partial) specialization. All
8628 containing classes must therefore also be explicitly
8631 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
8632 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
8633 template_count += 1;
8635 t = TYPE_MAIN_DECL (t);
8636 t = DECL_CONTEXT (t);
8639 if (ctype == current_class_type)
8643 permerror (input_location, "member functions are implicitly friends of their class");
8647 permerror (declarator->id_loc,
8648 "extra qualification %<%T::%> on member %qs",
8651 else if (/* If the qualifying type is already complete, then we
8652 can skip the following checks. */
8653 !COMPLETE_TYPE_P (ctype)
8654 && (/* If the function is being defined, then
8655 qualifying type must certainly be complete. */
8657 /* A friend declaration of "T::f" is OK, even if
8658 "T" is a template parameter. But, if this
8659 function is not a friend, the qualifying type
8661 || (!friendp && !CLASS_TYPE_P (ctype))
8662 /* For a declaration, the type need not be
8663 complete, if either it is dependent (since there
8664 is no meaningful definition of complete in that
8665 case) or the qualifying class is currently being
8667 || !(dependent_type_p (ctype)
8668 || currently_open_class (ctype)))
8669 /* Check that the qualifying type is complete. */
8670 && !complete_type_or_else (ctype, NULL_TREE))
8671 return error_mark_node;
8672 else if (TREE_CODE (type) == FUNCTION_TYPE)
8674 tree sname = declarator->u.id.unqualified_name;
8676 if (current_class_type
8677 && (!friendp || funcdef_flag))
8680 ? "cannot define member function %<%T::%s%> within %<%T%>"
8681 : "cannot declare member function %<%T::%s%> within %<%T%>",
8682 ctype, name, current_class_type);
8683 return error_mark_node;
8686 if (TREE_CODE (sname) == IDENTIFIER_NODE
8687 && NEW_DELETE_OPNAME_P (sname))
8688 /* Overloaded operator new and operator delete
8689 are always static functions. */
8692 type = build_memfn_type (type, ctype, memfn_quals);
8694 else if (declspecs->specs[(int)ds_typedef]
8695 && current_class_type)
8697 error ("cannot declare member %<%T::%s%> within %qT",
8698 ctype, name, current_class_type);
8699 return error_mark_node;
8703 /* Now TYPE has the actual type. */
8708 *attrlist = chainon (returned_attrs, *attrlist);
8710 attrlist = &returned_attrs;
8713 /* Handle parameter packs. */
8714 if (parameter_pack_p)
8716 if (decl_context == PARM)
8717 /* Turn the type into a pack expansion.*/
8718 type = make_pack_expansion (type);
8720 error ("non-parameter %qs cannot be a parameter pack", name);
8723 /* Did array size calculations overflow? */
8725 if (TREE_CODE (type) == ARRAY_TYPE
8726 && COMPLETE_TYPE_P (type)
8727 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
8728 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
8730 error ("size of array %qs is too large", name);
8731 /* If we proceed with the array type as it is, we'll eventually
8732 crash in tree_low_cst(). */
8733 type = error_mark_node;
8736 if ((decl_context == FIELD || decl_context == PARM)
8737 && !processing_template_decl
8738 && variably_modified_type_p (type, NULL_TREE))
8740 if (decl_context == FIELD)
8741 error ("data member may not have variably modified type %qT", type);
8743 error ("parameter may not have variably modified type %qT", type);
8744 type = error_mark_node;
8747 if (explicitp == 1 || (explicitp && friendp))
8749 /* [dcl.fct.spec] The explicit specifier shall only be used in
8750 declarations of constructors within a class definition. */
8751 error ("only declarations of constructors can be %<explicit%>");
8755 if (storage_class == sc_mutable)
8757 if (decl_context != FIELD || friendp)
8759 error ("non-member %qs cannot be declared %<mutable%>", name);
8760 storage_class = sc_none;
8762 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
8764 error ("non-object member %qs cannot be declared %<mutable%>", name);
8765 storage_class = sc_none;
8767 else if (TREE_CODE (type) == FUNCTION_TYPE
8768 || TREE_CODE (type) == METHOD_TYPE)
8770 error ("function %qs cannot be declared %<mutable%>", name);
8771 storage_class = sc_none;
8775 error ("static %qs cannot be declared %<mutable%>", name);
8776 storage_class = sc_none;
8778 else if (type_quals & TYPE_QUAL_CONST)
8780 error ("const %qs cannot be declared %<mutable%>", name);
8781 storage_class = sc_none;
8785 /* If this is declaring a typedef name, return a TYPE_DECL. */
8786 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
8790 /* Note that the grammar rejects storage classes
8791 in typenames, fields or parameters. */
8792 if (current_lang_name == lang_name_java)
8793 TYPE_FOR_JAVA (type) = 1;
8795 /* This declaration:
8797 typedef void f(int) const;
8799 declares a function type which is not a member of any
8800 particular class, but which is cv-qualified; for
8801 example "f S::*" declares a pointer to a const-qualified
8802 member function of S. We record the cv-qualification in the
8804 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
8806 type = cp_build_qualified_type (type, memfn_quals);
8808 /* We have now dealt with these qualifiers. */
8809 memfn_quals = TYPE_UNQUALIFIED;
8812 if (decl_context == FIELD)
8813 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
8815 decl = build_decl (TYPE_DECL, unqualified_id, type);
8816 if (id_declarator && declarator->u.id.qualifying_scope) {
8817 error ("%Jtypedef name may not be a nested-name-specifier", decl);
8818 TREE_TYPE (decl) = error_mark_node;
8821 if (decl_context != FIELD)
8823 if (!current_function_decl)
8824 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
8825 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
8826 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
8827 (current_function_decl)))
8828 /* The TYPE_DECL is "abstract" because there will be
8829 clones of this constructor/destructor, and there will
8830 be copies of this TYPE_DECL generated in those
8832 DECL_ABSTRACT (decl) = 1;
8834 else if (constructor_name_p (unqualified_id, current_class_type))
8835 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
8836 "as enclosing class",
8839 /* If the user declares "typedef struct {...} foo" then the
8840 struct will have an anonymous name. Fill that name in now.
8841 Nothing can refer to it, so nothing needs know about the name
8843 if (type != error_mark_node
8846 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8847 && TYPE_ANONYMOUS_P (type)
8848 && cp_type_quals (type) == TYPE_UNQUALIFIED)
8850 tree oldname = TYPE_NAME (type);
8853 /* Replace the anonymous name with the real name everywhere. */
8854 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
8855 if (TYPE_NAME (t) == oldname)
8856 TYPE_NAME (t) = decl;
8858 if (TYPE_LANG_SPECIFIC (type))
8859 TYPE_WAS_ANONYMOUS (type) = 1;
8861 /* If this is a typedef within a template class, the nested
8862 type is a (non-primary) template. The name for the
8863 template needs updating as well. */
8864 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
8865 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
8866 = TYPE_IDENTIFIER (type);
8868 /* FIXME remangle member functions; member functions of a
8869 type with external linkage have external linkage. */
8873 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
8874 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
8876 bad_specifiers (decl, "type", virtualp,
8877 memfn_quals != TYPE_UNQUALIFIED,
8878 inlinep, friendp, raises != NULL_TREE);
8883 /* Detect the case of an array type of unspecified size
8884 which came, as such, direct from a typedef name.
8885 We must copy the type, so that the array's domain can be
8886 individually set by the object's initializer. */
8888 if (type && typedef_type
8889 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
8890 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
8891 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
8893 /* Detect where we're using a typedef of function type to declare a
8894 function. PARMS will not be set, so we must create it now. */
8896 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
8898 tree decls = NULL_TREE;
8901 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
8903 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
8905 TREE_CHAIN (decl) = decls;
8909 parms = nreverse (decls);
8911 if (decl_context != TYPENAME)
8913 /* A cv-qualifier-seq shall only be part of the function type
8914 for a non-static member function. [8.3.5/4 dcl.fct] */
8915 if (cp_type_quals (type) != TYPE_UNQUALIFIED
8916 && (current_class_type == NULL_TREE || staticp) )
8919 ? G_("qualified function types cannot be used to "
8920 "declare static member functions")
8921 : G_("qualified function types cannot be used to "
8922 "declare free functions"));
8923 type = TYPE_MAIN_VARIANT (type);
8926 /* The qualifiers on the function type become the qualifiers on
8927 the non-static member function. */
8928 memfn_quals |= cp_type_quals (type);
8932 /* If this is a type name (such as, in a cast or sizeof),
8933 compute the type and return it now. */
8935 if (decl_context == TYPENAME)
8937 /* Note that the grammar rejects storage classes
8938 in typenames, fields or parameters. */
8939 if (type_quals != TYPE_UNQUALIFIED)
8940 type_quals = TYPE_UNQUALIFIED;
8942 /* Special case: "friend class foo" looks like a TYPENAME context. */
8945 if (type_quals != TYPE_UNQUALIFIED)
8947 error ("type qualifiers specified for friend class declaration");
8948 type_quals = TYPE_UNQUALIFIED;
8952 error ("%<inline%> specified for friend class declaration");
8958 /* Don't allow friend declaration without a class-key. */
8959 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8960 permerror (input_location, "template parameters cannot be friends");
8961 else if (TREE_CODE (type) == TYPENAME_TYPE)
8962 permerror (input_location, "friend declaration requires class-key, "
8963 "i.e. %<friend class %T::%D%>",
8964 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
8966 permerror (input_location, "friend declaration requires class-key, "
8967 "i.e. %<friend %#T%>",
8971 /* Only try to do this stuff if we didn't already give up. */
8972 if (type != integer_type_node)
8974 /* A friendly class? */
8975 if (current_class_type)
8976 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
8979 error ("trying to make class %qT a friend of global scope",
8982 type = void_type_node;
8985 else if (memfn_quals)
8987 if (ctype == NULL_TREE
8988 && TREE_CODE (type) == METHOD_TYPE)
8989 ctype = TYPE_METHOD_BASETYPE (type);
8992 type = build_memfn_type (type, ctype, memfn_quals);
8993 /* Core issue #547: need to allow this in template type args. */
8994 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
8995 type = cp_build_qualified_type (type, memfn_quals);
8997 error ("invalid qualifiers on non-member function type");
9002 else if (unqualified_id == NULL_TREE && decl_context != PARM
9003 && decl_context != CATCHPARM
9004 && TREE_CODE (type) != UNION_TYPE
9007 error ("abstract declarator %qT used as declaration", type);
9008 return error_mark_node;
9011 /* Only functions may be declared using an operator-function-id. */
9013 && IDENTIFIER_OPNAME_P (unqualified_id)
9014 && TREE_CODE (type) != FUNCTION_TYPE
9015 && TREE_CODE (type) != METHOD_TYPE)
9017 error ("declaration of %qD as non-function", unqualified_id);
9018 return error_mark_node;
9021 /* We don't check parameter types here because we can emit a better
9022 error message later. */
9023 if (decl_context != PARM)
9025 type = check_var_type (unqualified_id, type);
9026 if (type == error_mark_node)
9027 return error_mark_node;
9030 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9031 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9033 if (decl_context == PARM || decl_context == CATCHPARM)
9035 if (ctype || in_namespace)
9036 error ("cannot use %<::%> in parameter declaration");
9038 /* A parameter declared as an array of T is really a pointer to T.
9039 One declared as a function is really a pointer to a function.
9040 One declared as a member is really a pointer to member. */
9042 if (TREE_CODE (type) == ARRAY_TYPE)
9044 /* Transfer const-ness of array into that of type pointed to. */
9045 type = build_pointer_type (TREE_TYPE (type));
9046 type_quals = TYPE_UNQUALIFIED;
9048 else if (TREE_CODE (type) == FUNCTION_TYPE)
9049 type = build_pointer_type (type);
9055 if (decl_context == PARM)
9057 decl = cp_build_parm_decl (unqualified_id, type);
9059 bad_specifiers (decl, "parameter", virtualp,
9060 memfn_quals != TYPE_UNQUALIFIED,
9061 inlinep, friendp, raises != NULL_TREE);
9063 else if (decl_context == FIELD)
9065 /* The C99 flexible array extension. */
9066 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9067 && TYPE_DOMAIN (type) == NULL_TREE)
9069 tree itype = compute_array_index_type (dname, integer_zero_node);
9070 type = build_cplus_array_type (TREE_TYPE (type), itype);
9073 if (type == error_mark_node)
9075 /* Happens when declaring arrays of sizes which
9076 are error_mark_node, for example. */
9079 else if (in_namespace && !friendp)
9081 /* Something like struct S { int N::j; }; */
9082 error ("invalid use of %<::%>");
9083 return error_mark_node;
9085 else if (TREE_CODE (type) == FUNCTION_TYPE)
9088 tree function_context;
9092 if (ctype == NULL_TREE)
9093 ctype = current_class_type;
9095 if (ctype == NULL_TREE)
9097 error ("can't make %qD into a method -- not in a class",
9099 return error_mark_node;
9102 /* ``A union may [ ... ] not [ have ] virtual functions.''
9104 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9106 error ("function %qD declared virtual inside a union",
9108 return error_mark_node;
9111 if (NEW_DELETE_OPNAME_P (unqualified_id))
9115 error ("%qD cannot be declared virtual, since it "
9121 else if (staticp < 2)
9122 type = build_memfn_type (type, ctype, memfn_quals);
9125 /* Check that the name used for a destructor makes sense. */
9126 if (sfk == sfk_destructor)
9128 tree uqname = id_declarator->u.id.unqualified_name;
9132 gcc_assert (friendp);
9133 error ("expected qualified name in friend declaration "
9134 "for destructor %qD", uqname);
9135 return error_mark_node;
9138 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9140 error ("declaration of %qD as member of %qT",
9142 return error_mark_node;
9145 else if (sfk == sfk_constructor && friendp)
9147 error ("expected qualified name in friend declaration "
9148 "for constructor %qD",
9149 id_declarator->u.id.unqualified_name);
9150 return error_mark_node;
9153 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9154 function_context = (ctype != NULL_TREE) ?
9155 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9156 publicp = (! friendp || ! staticp)
9157 && function_context == NULL_TREE;
9158 decl = grokfndecl (ctype, type,
9159 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9160 ? unqualified_id : dname,
9163 virtualp, flags, memfn_quals, raises,
9164 friendp ? -1 : 0, friendp, publicp, inlinep,
9166 funcdef_flag, template_count, in_namespace,
9167 attrlist, declarator->id_loc);
9168 if (decl == NULL_TREE)
9169 return error_mark_node;
9171 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9172 /* The decl and setting of decl_attr is also turned off. */
9173 decl = build_decl_attribute_variant (decl, decl_attr);
9176 /* [class.conv.ctor]
9178 A constructor declared without the function-specifier
9179 explicit that can be called with a single parameter
9180 specifies a conversion from the type of its first
9181 parameter to the type of its class. Such a constructor
9182 is called a converting constructor. */
9184 DECL_NONCONVERTING_P (decl) = 1;
9186 else if (TREE_CODE (type) == METHOD_TYPE)
9188 /* We only get here for friend declarations of
9189 members of other classes. */
9190 /* All method decls are public, so tell grokfndecl to set
9191 TREE_PUBLIC, also. */
9192 decl = grokfndecl (ctype, type,
9193 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9194 ? unqualified_id : dname,
9197 virtualp, flags, memfn_quals, raises,
9198 friendp ? -1 : 0, friendp, 1, 0, sfk,
9199 funcdef_flag, template_count, in_namespace,
9201 declarator->id_loc);
9202 if (decl == NULL_TREE)
9203 return error_mark_node;
9205 else if (!staticp && !dependent_type_p (type)
9206 && !COMPLETE_TYPE_P (complete_type (type))
9207 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9210 error ("field %qD has incomplete type", unqualified_id);
9212 error ("name %qT has incomplete type", type);
9214 /* If we're instantiating a template, tell them which
9215 instantiation made the field's type be incomplete. */
9216 if (current_class_type
9217 && TYPE_NAME (current_class_type)
9218 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9220 && declspecs->type == type)
9221 error (" in instantiation of template %qT",
9222 current_class_type);
9224 return error_mark_node;
9230 error ("%qE is neither function nor member function; "
9231 "cannot be declared friend", unqualified_id);
9239 /* Friends are treated specially. */
9240 if (ctype == current_class_type)
9241 ; /* We already issued a permerror. */
9242 else if (decl && DECL_NAME (decl))
9244 if (template_class_depth (current_class_type) == 0)
9246 decl = check_explicit_specialization
9247 (unqualified_id, decl, template_count,
9248 2 * funcdef_flag + 4);
9249 if (decl == error_mark_node)
9250 return error_mark_node;
9253 decl = do_friend (ctype, unqualified_id, decl,
9259 return error_mark_node;
9262 /* Structure field. It may not be a function, except for C++. */
9264 if (decl == NULL_TREE)
9270 /* An attempt is being made to initialize a non-static
9271 member. But, from [class.mem]:
9273 4 A member-declarator can contain a
9274 constant-initializer only if it declares a static
9275 member (_class.static_) of integral or enumeration
9276 type, see _class.static.data_.
9278 This used to be relatively common practice, but
9279 the rest of the compiler does not correctly
9280 handle the initialization unless the member is
9281 static so we make it static below. */
9282 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9284 permerror (input_location, "making %qD static", unqualified_id);
9288 if (uses_template_parms (type))
9289 /* We'll check at instantiation time. */
9291 else if (check_static_variable_definition (unqualified_id,
9293 /* If we just return the declaration, crashes
9294 will sometimes occur. We therefore return
9295 void_type_node, as if this was a friend
9296 declaration, to cause callers to completely
9297 ignore this declaration. */
9298 return error_mark_node;
9303 /* C++ allows static class members. All other work
9304 for this is done by grokfield. */
9305 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9306 set_linkage_for_static_data_member (decl);
9307 /* Even if there is an in-class initialization, DECL
9308 is considered undefined until an out-of-class
9309 definition is provided. */
9310 DECL_EXTERNAL (decl) = 1;
9313 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9317 decl = build_decl (FIELD_DECL, unqualified_id, type);
9318 DECL_NONADDRESSABLE_P (decl) = bitfield;
9319 if (bitfield && !unqualified_id)
9320 TREE_NO_WARNING (decl) = 1;
9322 if (storage_class == sc_mutable)
9324 DECL_MUTABLE_P (decl) = 1;
9325 storage_class = sc_none;
9329 bad_specifiers (decl, "field", virtualp,
9330 memfn_quals != TYPE_UNQUALIFIED,
9331 inlinep, friendp, raises != NULL_TREE);
9334 else if (TREE_CODE (type) == FUNCTION_TYPE
9335 || TREE_CODE (type) == METHOD_TYPE)
9340 if (!unqualified_id)
9341 return error_mark_node;
9343 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9344 original_name = dname;
9346 original_name = unqualified_id;
9348 if (storage_class == sc_auto)
9349 error ("storage class %<auto%> invalid for function %qs", name);
9350 else if (storage_class == sc_register)
9351 error ("storage class %<register%> invalid for function %qs", name);
9353 error ("storage class %<__thread%> invalid for function %qs", name);
9355 /* Function declaration not at top level.
9356 Storage classes other than `extern' are not allowed
9357 and `extern' makes no difference. */
9358 if (! toplevel_bindings_p ()
9359 && (storage_class == sc_static
9360 || declspecs->specs[(int)ds_inline])
9363 if (storage_class == sc_static)
9364 pedwarn (input_location, OPT_pedantic,
9365 "%<static%> specified invalid for function %qs "
9366 "declared out of global scope", name);
9368 pedwarn (input_location, OPT_pedantic,
9369 "%<inline%> specifier invalid for function %qs "
9370 "declared out of global scope", name);
9373 if (ctype != NULL_TREE
9374 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
9376 error ("%q#T is not a class or a namespace", ctype);
9380 if (ctype == NULL_TREE)
9384 error ("virtual non-class function %qs", name);
9387 else if (sfk == sfk_constructor
9388 || sfk == sfk_destructor)
9391 ? "%qs defined in a non-class scope"
9392 : "%qs declared in a non-class scope", name);
9396 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9397 && !NEW_DELETE_OPNAME_P (original_name))
9398 type = build_method_type_directly (ctype,
9400 TYPE_ARG_TYPES (type));
9402 /* Record presence of `static'. */
9403 publicp = (ctype != NULL_TREE
9404 || storage_class == sc_extern
9405 || storage_class != sc_static);
9407 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
9408 virtualp, flags, memfn_quals, raises,
9410 publicp, inlinep, sfk, funcdef_flag,
9411 template_count, in_namespace, attrlist,
9412 declarator->id_loc);
9413 if (decl == NULL_TREE)
9414 return error_mark_node;
9418 int invalid_static = 0;
9420 /* Don't allow a static member function in a class, and forbid
9421 declaring main to be static. */
9422 if (TREE_CODE (type) == METHOD_TYPE)
9424 permerror (input_location, "cannot declare member function %qD to have "
9425 "static linkage", decl);
9428 else if (current_function_decl)
9430 /* FIXME need arm citation */
9431 error ("cannot declare static function inside another function");
9438 storage_class = sc_none;
9444 /* It's a variable. */
9446 /* An uninitialized decl with `extern' is a reference. */
9447 decl = grokvardecl (type, unqualified_id,
9450 (type_quals & TYPE_QUAL_CONST) != 0,
9451 ctype ? ctype : in_namespace);
9452 bad_specifiers (decl, "variable", virtualp,
9453 memfn_quals != TYPE_UNQUALIFIED,
9454 inlinep, friendp, raises != NULL_TREE);
9458 DECL_CONTEXT (decl) = ctype;
9461 permerror (input_location, "%<static%> may not be used when defining "
9462 "(as opposed to declaring) a static data member");
9464 storage_class = sc_none;
9466 if (storage_class == sc_register && TREE_STATIC (decl))
9468 error ("static member %qD declared %<register%>", decl);
9469 storage_class = sc_none;
9471 if (storage_class == sc_extern && pedantic)
9473 pedwarn (input_location, OPT_pedantic,
9474 "cannot explicitly declare member %q#D to have "
9475 "extern linkage", decl);
9476 storage_class = sc_none;
9481 if (storage_class == sc_extern && initialized && !funcdef_flag)
9483 if (toplevel_bindings_p ())
9485 /* It's common practice (and completely valid) to have a const
9486 be initialized and declared extern. */
9487 if (!(type_quals & TYPE_QUAL_CONST))
9488 warning (0, "%qs initialized and declared %<extern%>", name);
9492 error ("%qs has both %<extern%> and initializer", name);
9493 return error_mark_node;
9497 /* Record `register' declaration for warnings on &
9498 and in case doing stupid register allocation. */
9500 if (storage_class == sc_register)
9501 DECL_REGISTER (decl) = 1;
9502 else if (storage_class == sc_extern)
9503 DECL_THIS_EXTERN (decl) = 1;
9504 else if (storage_class == sc_static)
9505 DECL_THIS_STATIC (decl) = 1;
9507 /* Record constancy and volatility on the DECL itself . There's
9508 no need to do this when processing a template; we'll do this
9509 for the instantiated declaration based on the type of DECL. */
9510 if (!processing_template_decl)
9511 cp_apply_type_quals_to_decl (type_quals, decl);
9517 /* Subroutine of start_function. Ensure that each of the parameter
9518 types (as listed in PARMS) is complete, as is required for a
9519 function definition. */
9522 require_complete_types_for_parms (tree parms)
9524 for (; parms; parms = TREE_CHAIN (parms))
9526 if (dependent_type_p (TREE_TYPE (parms)))
9528 if (!VOID_TYPE_P (TREE_TYPE (parms))
9529 && complete_type_or_else (TREE_TYPE (parms), parms))
9531 relayout_decl (parms);
9532 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
9535 /* grokparms or complete_type_or_else will have already issued
9537 TREE_TYPE (parms) = error_mark_node;
9541 /* Returns nonzero if T is a local variable. */
9544 local_variable_p (const_tree t)
9546 if ((TREE_CODE (t) == VAR_DECL
9547 /* A VAR_DECL with a context that is a _TYPE is a static data
9549 && !TYPE_P (CP_DECL_CONTEXT (t))
9550 /* Any other non-local variable must be at namespace scope. */
9551 && !DECL_NAMESPACE_SCOPE_P (t))
9552 || (TREE_CODE (t) == PARM_DECL))
9558 /* Like local_variable_p, but suitable for use as a tree-walking
9562 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
9563 void *data ATTRIBUTE_UNUSED)
9565 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
9567 else if (TYPE_P (*tp))
9574 /* Check that ARG, which is a default-argument expression for a
9575 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
9576 something goes wrong. DECL may also be a _TYPE node, rather than a
9577 DECL, if there is no DECL available. */
9580 check_default_argument (tree decl, tree arg)
9585 if (TREE_CODE (arg) == DEFAULT_ARG)
9586 /* We get a DEFAULT_ARG when looking at an in-class declaration
9587 with a default argument. Ignore the argument for now; we'll
9588 deal with it after the class is complete. */
9597 decl_type = TREE_TYPE (decl);
9599 if (arg == error_mark_node
9600 || decl == error_mark_node
9601 || TREE_TYPE (arg) == error_mark_node
9602 || decl_type == error_mark_node)
9603 /* Something already went wrong. There's no need to check
9605 return error_mark_node;
9607 /* [dcl.fct.default]
9609 A default argument expression is implicitly converted to the
9611 if (!TREE_TYPE (arg)
9612 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
9615 error ("default argument for %q#D has type %qT",
9616 decl, TREE_TYPE (arg));
9618 error ("default argument for parameter of type %qT has type %qT",
9619 decl_type, TREE_TYPE (arg));
9621 return error_mark_node;
9624 /* [dcl.fct.default]
9626 Local variables shall not be used in default argument
9629 The keyword `this' shall not be used in a default argument of a
9631 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
9634 error ("default argument %qE uses local variable %qD", arg, var);
9635 return error_mark_node;
9642 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
9645 type_is_deprecated (tree type)
9647 enum tree_code code;
9648 if (TREE_DEPRECATED (type))
9650 if (TYPE_NAME (type)
9651 && TREE_DEPRECATED (TYPE_NAME (type)))
9654 code = TREE_CODE (type);
9656 if (code == POINTER_TYPE || code == REFERENCE_TYPE
9657 || code == OFFSET_TYPE || code == FUNCTION_TYPE
9658 || code == METHOD_TYPE || code == ARRAY_TYPE)
9659 return type_is_deprecated (TREE_TYPE (type));
9661 if (TYPE_PTRMEMFUNC_P (type))
9662 return type_is_deprecated
9663 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
9668 /* Decode the list of parameter types for a function type.
9669 Given the list of things declared inside the parens,
9670 return a list of types.
9672 If this parameter does not end with an ellipsis, we append
9675 *PARMS is set to the chain of PARM_DECLs created. */
9678 grokparms (tree parmlist, tree *parms)
9680 tree result = NULL_TREE;
9681 tree decls = NULL_TREE;
9685 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
9687 tree type = NULL_TREE;
9688 tree init = TREE_PURPOSE (parm);
9689 tree decl = TREE_VALUE (parm);
9691 if (parm == void_list_node)
9694 if (! decl || TREE_TYPE (decl) == error_mark_node)
9697 type = TREE_TYPE (decl);
9698 if (VOID_TYPE_P (type))
9700 if (same_type_p (type, void_type_node)
9701 && DECL_SELF_REFERENCE_P (type)
9702 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
9703 /* this is a parmlist of `(void)', which is ok. */
9705 cxx_incomplete_type_error (decl, type);
9706 /* It's not a good idea to actually create parameters of
9707 type `void'; other parts of the compiler assume that a
9708 void type terminates the parameter list. */
9709 type = error_mark_node;
9710 TREE_TYPE (decl) = error_mark_node;
9713 if (type != error_mark_node
9714 && TYPE_FOR_JAVA (type)
9715 && MAYBE_CLASS_TYPE_P (type))
9717 error ("parameter %qD has Java class type", decl);
9718 type = error_mark_node;
9719 TREE_TYPE (decl) = error_mark_node;
9723 if (type != error_mark_node)
9725 if (deprecated_state != DEPRECATED_SUPPRESS)
9727 tree deptype = type_is_deprecated (type);
9729 warn_deprecated_use (deptype);
9732 /* Top-level qualifiers on the parameters are
9733 ignored for function types. */
9734 type = cp_build_qualified_type (type, 0);
9735 if (TREE_CODE (type) == METHOD_TYPE)
9737 error ("parameter %qD invalidly declared method type", decl);
9738 type = build_pointer_type (type);
9739 TREE_TYPE (decl) = type;
9741 else if (abstract_virtuals_error (decl, type))
9742 any_error = 1; /* Seems like a good idea. */
9743 else if (POINTER_TYPE_P (type))
9745 /* [dcl.fct]/6, parameter types cannot contain pointers
9746 (references) to arrays of unknown bound. */
9747 tree t = TREE_TYPE (type);
9748 int ptr = TYPE_PTR_P (type);
9754 else if (TREE_CODE (t) != ARRAY_TYPE)
9756 else if (!TYPE_DOMAIN (t))
9760 if (TREE_CODE (t) == ARRAY_TYPE)
9761 error ("parameter %qD includes %s to array of unknown "
9763 decl, ptr ? "pointer" : "reference", t);
9768 else if (init && !processing_template_decl)
9769 init = check_default_argument (decl, init);
9772 if (TREE_CODE (decl) == PARM_DECL
9773 && FUNCTION_PARAMETER_PACK_P (decl)
9774 && TREE_CHAIN (parm)
9775 && TREE_CHAIN (parm) != void_list_node)
9776 error ("parameter packs must be at the end of the parameter list");
9778 TREE_CHAIN (decl) = decls;
9780 result = tree_cons (init, type, result);
9782 decls = nreverse (decls);
9783 result = nreverse (result);
9785 result = chainon (result, void_list_node);
9792 /* D is a constructor or overloaded `operator='.
9794 Let T be the class in which D is declared. Then, this function
9797 -1 if D's is an ill-formed constructor or copy assignment operator
9798 whose first parameter is of type `T'.
9799 0 if D is not a copy constructor or copy assignment
9801 1 if D is a copy constructor or copy assignment operator whose
9802 first parameter is a reference to const qualified T.
9803 2 if D is a copy constructor or copy assignment operator whose
9804 first parameter is a reference to non-const qualified T.
9806 This function can be used as a predicate. Positive values indicate
9807 a copy constructor and nonzero values indicate a copy assignment
9811 copy_fn_p (const_tree d)
9817 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9819 if (TREE_CODE (d) == TEMPLATE_DECL
9820 || (DECL_TEMPLATE_INFO (d)
9821 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9822 /* Instantiations of template member functions are never copy
9823 functions. Note that member functions of templated classes are
9824 represented as template functions internally, and we must
9825 accept those as copy functions. */
9828 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9832 arg_type = TREE_VALUE (args);
9833 if (arg_type == error_mark_node)
9836 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
9838 /* Pass by value copy assignment operator. */
9841 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
9842 && !TYPE_REF_IS_RVALUE (arg_type)
9843 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
9845 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
9851 args = TREE_CHAIN (args);
9853 if (args && args != void_list_node && !TREE_PURPOSE (args))
9854 /* There are more non-optional args. */
9860 /* D is a constructor or overloaded `operator='.
9862 Let T be the class in which D is declared. Then, this function
9863 returns true when D is a move constructor or move assignment
9864 operator, false otherwise. */
9867 move_fn_p (const_tree d)
9871 bool result = false;
9873 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
9875 if (cxx_dialect == cxx98)
9876 /* There are no move constructors if we are in C++98 mode. */
9879 if (TREE_CODE (d) == TEMPLATE_DECL
9880 || (DECL_TEMPLATE_INFO (d)
9881 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
9882 /* Instantiations of template member functions are never copy
9883 functions. Note that member functions of templated classes are
9884 represented as template functions internally, and we must
9885 accept those as copy functions. */
9888 args = FUNCTION_FIRST_USER_PARMTYPE (d);
9892 arg_type = TREE_VALUE (args);
9893 if (arg_type == error_mark_node)
9896 if (TREE_CODE (arg_type) == REFERENCE_TYPE
9897 && TYPE_REF_IS_RVALUE (arg_type)
9898 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
9902 args = TREE_CHAIN (args);
9904 if (args && args != void_list_node && !TREE_PURPOSE (args))
9905 /* There are more non-optional args. */
9911 /* Remember any special properties of member function DECL. */
9913 #define DECL_DEFAULTED_IN_CLASS_P(DECL) \
9914 (DECL_DEFAULTED_FN (DECL) \
9915 && (DECL_ARTIFICIAL (DECL) || DECL_INITIALIZED_IN_CLASS_P (DECL)))
9918 grok_special_member_properties (tree decl)
9922 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
9925 class_type = DECL_CONTEXT (decl);
9926 if (DECL_CONSTRUCTOR_P (decl))
9928 int ctor = copy_fn_p (decl);
9930 if (!DECL_ARTIFICIAL (decl))
9931 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
9937 A non-template constructor for class X is a copy
9938 constructor if its first parameter is of type X&, const
9939 X&, volatile X& or const volatile X&, and either there
9940 are no other parameters or else all other parameters have
9941 default arguments. */
9942 TYPE_HAS_INIT_REF (class_type) = 1;
9943 if (!DECL_DEFAULTED_IN_CLASS_P (decl))
9944 TYPE_HAS_COMPLEX_INIT_REF (class_type) = 1;
9946 TYPE_HAS_CONST_INIT_REF (class_type) = 1;
9948 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
9950 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
9951 if (TREE_CODE (decl) == TEMPLATE_DECL
9952 || !DECL_DEFAULTED_IN_CLASS_P (decl))
9953 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
9955 else if (is_list_ctor (decl))
9956 TYPE_HAS_LIST_CTOR (class_type) = 1;
9958 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
9962 A non-template assignment operator for class X is a copy
9963 assignment operator if its parameter is of type X, X&, const
9964 X&, volatile X& or const volatile X&. */
9966 int assop = copy_fn_p (decl);
9970 TYPE_HAS_ASSIGN_REF (class_type) = 1;
9971 if (!DECL_DEFAULTED_IN_CLASS_P (decl))
9972 TYPE_HAS_COMPLEX_ASSIGN_REF (class_type) = 1;
9974 TYPE_HAS_CONST_ASSIGN_REF (class_type) = 1;
9979 /* Check a constructor DECL has the correct form. Complains
9980 if the class has a constructor of the form X(X). */
9983 grok_ctor_properties (const_tree ctype, const_tree decl)
9985 int ctor_parm = copy_fn_p (decl);
9991 A declaration of a constructor for a class X is ill-formed if
9992 its first parameter is of type (optionally cv-qualified) X
9993 and either there are no other parameters or else all other
9994 parameters have default arguments.
9996 We *don't* complain about member template instantiations that
9997 have this form, though; they can occur as we try to decide
9998 what constructor to use during overload resolution. Since
9999 overload resolution will never prefer such a constructor to
10000 the non-template copy constructor (which is either explicitly
10001 or implicitly defined), there's no need to worry about their
10002 existence. Theoretically, they should never even be
10003 instantiated, but that's hard to forestall. */
10004 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10012 /* An operator with this code is unary, but can also be binary. */
10015 ambi_op_p (enum tree_code code)
10017 return (code == INDIRECT_REF
10018 || code == ADDR_EXPR
10019 || code == UNARY_PLUS_EXPR
10020 || code == NEGATE_EXPR
10021 || code == PREINCREMENT_EXPR
10022 || code == PREDECREMENT_EXPR);
10025 /* An operator with this name can only be unary. */
10028 unary_op_p (enum tree_code code)
10030 return (code == TRUTH_NOT_EXPR
10031 || code == BIT_NOT_EXPR
10032 || code == COMPONENT_REF
10033 || code == TYPE_EXPR);
10036 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10037 errors are issued for invalid declarations. */
10040 grok_op_properties (tree decl, bool complain)
10042 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10044 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10045 tree name = DECL_NAME (decl);
10046 enum tree_code operator_code;
10051 /* Count the number of arguments and check for ellipsis. */
10052 for (argtype = argtypes, arity = 0;
10053 argtype && argtype != void_list_node;
10054 argtype = TREE_CHAIN (argtype))
10056 ellipsis_p = !argtype;
10058 class_type = DECL_CONTEXT (decl);
10059 if (class_type && !CLASS_TYPE_P (class_type))
10060 class_type = NULL_TREE;
10062 if (DECL_CONV_FN_P (decl))
10063 operator_code = TYPE_EXPR;
10067 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10068 if (ansi_opname (CODE) == name) \
10070 operator_code = (CODE); \
10073 else if (ansi_assopname (CODE) == name) \
10075 operator_code = (CODE); \
10076 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10080 #include "operators.def"
10081 #undef DEF_OPERATOR
10083 gcc_unreachable ();
10086 gcc_assert (operator_code != MAX_TREE_CODES);
10087 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10090 switch (operator_code)
10093 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10097 TYPE_GETS_DELETE (class_type) |= 1;
10101 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10104 case VEC_DELETE_EXPR:
10105 TYPE_GETS_DELETE (class_type) |= 2;
10112 /* [basic.std.dynamic.allocation]/1:
10114 A program is ill-formed if an allocation function is declared
10115 in a namespace scope other than global scope or declared static
10118 The same also holds true for deallocation functions. */
10119 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10120 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10122 if (DECL_NAMESPACE_SCOPE_P (decl))
10124 if (CP_DECL_CONTEXT (decl) != global_namespace)
10126 error ("%qD may not be declared within a namespace", decl);
10129 else if (!TREE_PUBLIC (decl))
10131 error ("%qD may not be declared as static", decl);
10137 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10139 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10140 DECL_IS_OPERATOR_NEW (decl) = 1;
10142 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10143 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10146 /* An operator function must either be a non-static member function
10147 or have at least one parameter of a class, a reference to a class,
10148 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10149 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10151 if (operator_code == TYPE_EXPR
10152 || operator_code == CALL_EXPR
10153 || operator_code == COMPONENT_REF
10154 || operator_code == ARRAY_REF
10155 || operator_code == NOP_EXPR)
10157 error ("%qD must be a nonstatic member function", decl);
10164 if (DECL_STATIC_FUNCTION_P (decl))
10166 error ("%qD must be either a non-static member "
10167 "function or a non-member function", decl);
10171 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10173 tree arg = non_reference (TREE_VALUE (p));
10174 if (arg == error_mark_node)
10177 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10178 because these checks are performed even on
10179 template functions. */
10180 if (MAYBE_CLASS_TYPE_P (arg)
10181 || TREE_CODE (arg) == ENUMERAL_TYPE)
10185 if (!p || p == void_list_node)
10188 error ("%qD must have an argument of class or "
10189 "enumerated type", decl);
10195 /* There are no restrictions on the arguments to an overloaded
10197 if (operator_code == CALL_EXPR)
10200 /* Warn about conversion operators that will never be used. */
10201 if (IDENTIFIER_TYPENAME_P (name)
10202 && ! DECL_TEMPLATE_INFO (decl)
10204 /* Warn only declaring the function; there is no need to
10205 warn again about out-of-class definitions. */
10206 && class_type == current_class_type)
10208 tree t = TREE_TYPE (name);
10209 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10210 const char *what = 0;
10213 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10215 if (TREE_CODE (t) == VOID_TYPE)
10217 else if (class_type)
10219 if (t == class_type)
10220 what = "the same type";
10221 /* Don't force t to be complete here. */
10222 else if (MAYBE_CLASS_TYPE_P (t)
10223 && COMPLETE_TYPE_P (t)
10224 && DERIVED_FROM_P (t, class_type))
10225 what = "a base class";
10229 warning (OPT_Wconversion, "conversion to %s%s will never use a type "
10230 "conversion operator",
10231 ref ? "a reference to " : "", what);
10234 if (operator_code == COND_EXPR)
10237 error ("ISO C++ prohibits overloading operator ?:");
10240 else if (ellipsis_p)
10242 error ("%qD must not have variable number of arguments", decl);
10245 else if (ambi_op_p (operator_code))
10248 /* We pick the one-argument operator codes by default, so
10249 we don't have to change anything. */
10251 else if (arity == 2)
10253 /* If we thought this was a unary operator, we now know
10254 it to be a binary operator. */
10255 switch (operator_code)
10258 operator_code = MULT_EXPR;
10262 operator_code = BIT_AND_EXPR;
10265 case UNARY_PLUS_EXPR:
10266 operator_code = PLUS_EXPR;
10270 operator_code = MINUS_EXPR;
10273 case PREINCREMENT_EXPR:
10274 operator_code = POSTINCREMENT_EXPR;
10277 case PREDECREMENT_EXPR:
10278 operator_code = POSTDECREMENT_EXPR;
10282 gcc_unreachable ();
10285 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10287 if ((operator_code == POSTINCREMENT_EXPR
10288 || operator_code == POSTDECREMENT_EXPR)
10289 && ! processing_template_decl
10290 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10293 error ("postfix %qD must take %<int%> as its argument",
10296 error ("postfix %qD must take %<int%> as its second "
10304 error ("%qD must take either zero or one argument", decl);
10306 error ("%qD must take either one or two arguments", decl);
10310 /* More Effective C++ rule 6. */
10312 && (operator_code == POSTINCREMENT_EXPR
10313 || operator_code == POSTDECREMENT_EXPR
10314 || operator_code == PREINCREMENT_EXPR
10315 || operator_code == PREDECREMENT_EXPR))
10317 tree arg = TREE_VALUE (argtypes);
10318 tree ret = TREE_TYPE (TREE_TYPE (decl));
10319 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
10320 arg = TREE_TYPE (arg);
10321 arg = TYPE_MAIN_VARIANT (arg);
10322 if (operator_code == PREINCREMENT_EXPR
10323 || operator_code == PREDECREMENT_EXPR)
10325 if (TREE_CODE (ret) != REFERENCE_TYPE
10326 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
10328 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
10329 build_reference_type (arg));
10333 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
10334 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
10338 else if (unary_op_p (operator_code))
10343 error ("%qD must take %<void%>", decl);
10345 error ("%qD must take exactly one argument", decl);
10349 else /* if (binary_op_p (operator_code)) */
10354 error ("%qD must take exactly one argument", decl);
10356 error ("%qD must take exactly two arguments", decl);
10360 /* More Effective C++ rule 7. */
10362 && (operator_code == TRUTH_ANDIF_EXPR
10363 || operator_code == TRUTH_ORIF_EXPR
10364 || operator_code == COMPOUND_EXPR))
10365 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
10369 /* Effective C++ rule 23. */
10372 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
10373 && (operator_code == PLUS_EXPR
10374 || operator_code == MINUS_EXPR
10375 || operator_code == TRUNC_DIV_EXPR
10376 || operator_code == MULT_EXPR
10377 || operator_code == TRUNC_MOD_EXPR)
10378 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
10379 warning (OPT_Weffc__, "%qD should return by value", decl);
10381 /* [over.oper]/8 */
10382 for (; argtypes && argtypes != void_list_node;
10383 argtypes = TREE_CHAIN (argtypes))
10384 if (TREE_PURPOSE (argtypes))
10386 TREE_PURPOSE (argtypes) = NULL_TREE;
10387 if (operator_code == POSTINCREMENT_EXPR
10388 || operator_code == POSTDECREMENT_EXPR)
10390 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
10395 error ("%qD cannot have default arguments", decl);
10403 /* Return a string giving the keyword associate with CODE. */
10405 static const char *
10406 tag_name (enum tag_types code)
10418 case typename_type:
10421 gcc_unreachable ();
10425 /* Name lookup in an elaborated-type-specifier (after the keyword
10426 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
10427 elaborated-type-specifier is invalid, issue a diagnostic and return
10428 error_mark_node; otherwise, return the *_TYPE to which it referred.
10429 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
10432 check_elaborated_type_specifier (enum tag_types tag_code,
10434 bool allow_template_p)
10440 struct S { struct S *p; };
10442 name lookup will find the TYPE_DECL for the implicit "S::S"
10443 typedef. Adjust for that here. */
10444 if (DECL_SELF_REFERENCE_P (decl))
10445 decl = TYPE_NAME (TREE_TYPE (decl));
10447 type = TREE_TYPE (decl);
10449 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
10450 is false for this case as well. */
10451 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
10453 error ("using template type parameter %qT after %qs",
10454 type, tag_name (tag_code));
10455 return error_mark_node;
10459 If the identifier resolves to a typedef-name or a template
10460 type-parameter, the elaborated-type-specifier is ill-formed.
10462 In other words, the only legitimate declaration to use in the
10463 elaborated type specifier is the implicit typedef created when
10464 the type is declared. */
10465 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
10466 && tag_code != typename_type)
10468 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
10469 error ("%q+D has a previous declaration here", decl);
10470 return error_mark_node;
10472 else if (TREE_CODE (type) != RECORD_TYPE
10473 && TREE_CODE (type) != UNION_TYPE
10474 && tag_code != enum_type
10475 && tag_code != typename_type)
10477 error ("%qT referred to as %qs", type, tag_name (tag_code));
10478 error ("%q+T has a previous declaration here", type);
10479 return error_mark_node;
10481 else if (TREE_CODE (type) != ENUMERAL_TYPE
10482 && tag_code == enum_type)
10484 error ("%qT referred to as enum", type);
10485 error ("%q+T has a previous declaration here", type);
10486 return error_mark_node;
10488 else if (!allow_template_p
10489 && TREE_CODE (type) == RECORD_TYPE
10490 && CLASSTYPE_IS_TEMPLATE (type))
10492 /* If a class template appears as elaborated type specifier
10493 without a template header such as:
10495 template <class T> class C {};
10496 void f(class C); // No template header here
10498 then the required template argument is missing. */
10499 error ("template argument required for %<%s %T%>",
10500 tag_name (tag_code),
10501 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
10502 return error_mark_node;
10508 /* Lookup NAME in elaborate type specifier in scope according to
10509 SCOPE and issue diagnostics if necessary.
10510 Return *_TYPE node upon success, NULL_TREE when the NAME is not
10511 found, and ERROR_MARK_NODE for type error. */
10514 lookup_and_check_tag (enum tag_types tag_code, tree name,
10515 tag_scope scope, bool template_header_p)
10519 if (scope == ts_global)
10521 /* First try ordinary name lookup, ignoring hidden class name
10522 injected via friend declaration. */
10523 decl = lookup_name_prefer_type (name, 2);
10524 /* If that fails, the name will be placed in the smallest
10525 non-class, non-function-prototype scope according to 3.3.1/5.
10526 We may already have a hidden name declared as friend in this
10527 scope. So lookup again but not ignoring hidden names.
10528 If we find one, that name will be made visible rather than
10529 creating a new tag. */
10531 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
10534 decl = lookup_type_scope (name, scope);
10536 if (decl && DECL_CLASS_TEMPLATE_P (decl))
10537 decl = DECL_TEMPLATE_RESULT (decl);
10539 if (decl && TREE_CODE (decl) == TYPE_DECL)
10541 /* Look for invalid nested type:
10545 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
10547 error ("%qD has the same name as the class in which it is "
10550 return error_mark_node;
10553 /* Two cases we need to consider when deciding if a class
10554 template is allowed as an elaborated type specifier:
10555 1. It is a self reference to its own class.
10556 2. It comes with a template header.
10560 template <class T> class C {
10561 class C *c1; // DECL_SELF_REFERENCE_P is true
10564 template <class U> class C; // template_header_p is true
10565 template <class T> class C<T>::D {
10566 class C *c2; // DECL_SELF_REFERENCE_P is true
10569 t = check_elaborated_type_specifier (tag_code,
10572 | DECL_SELF_REFERENCE_P (decl));
10575 else if (decl && TREE_CODE (decl) == TREE_LIST)
10577 error ("reference to %qD is ambiguous", name);
10578 print_candidates (decl);
10579 return error_mark_node;
10585 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
10586 Define the tag as a forward-reference if it is not defined.
10588 If a declaration is given, process it here, and report an error if
10589 multiple declarations are not identical.
10591 SCOPE is TS_CURRENT when this is also a definition. Only look in
10592 the current frame for the name (since C++ allows new names in any
10593 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
10594 declaration. Only look beginning from the current scope outward up
10595 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
10597 TEMPLATE_HEADER_P is true when this declaration is preceded by
10598 a set of template parameters. */
10601 xref_tag (enum tag_types tag_code, tree name,
10602 tag_scope scope, bool template_header_p)
10604 enum tree_code code;
10606 tree context = NULL_TREE;
10608 timevar_push (TV_NAME_LOOKUP);
10610 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10616 code = RECORD_TYPE;
10622 code = ENUMERAL_TYPE;
10625 gcc_unreachable ();
10628 /* In case of anonymous name, xref_tag is only called to
10629 make type node and push name. Name lookup is not required. */
10630 if (ANON_AGGRNAME_P (name))
10633 t = lookup_and_check_tag (tag_code, name,
10634 scope, template_header_p);
10636 if (t == error_mark_node)
10637 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10639 if (scope != ts_current && t && current_class_type
10640 && template_class_depth (current_class_type)
10641 && template_header_p)
10643 /* Since SCOPE is not TS_CURRENT, we are not looking at a
10644 definition of this tag. Since, in addition, we are currently
10645 processing a (member) template declaration of a template
10646 class, we must be very careful; consider:
10653 { template <class V>
10654 friend struct S1; };
10656 Here, the S2::S1 declaration should not be confused with the
10657 outer declaration. In particular, the inner version should
10658 have a template parameter of level 2, not level 1. This
10659 would be particularly important if the member declaration
10662 template <class V = U> friend struct S1;
10664 say, when we should tsubst into `U' when instantiating
10665 S2. On the other hand, when presented with:
10675 we must find the inner binding eventually. We
10676 accomplish this by making sure that the new type we
10677 create to represent this declaration has the right
10679 context = TYPE_CONTEXT (t);
10685 /* If no such tag is yet defined, create a forward-reference node
10686 and record it as the "definition".
10687 When a real declaration of this type is found,
10688 the forward-reference will be altered into a real type. */
10689 if (code == ENUMERAL_TYPE)
10691 error ("use of enum %q#D without previous declaration", name);
10692 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10696 t = make_class_type (code);
10697 TYPE_CONTEXT (t) = context;
10698 t = pushtag (name, t, scope);
10703 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
10705 if (!redeclare_class_template (t, current_template_parms))
10706 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10708 else if (!processing_template_decl
10709 && CLASS_TYPE_P (t)
10710 && CLASSTYPE_IS_TEMPLATE (t))
10712 error ("redeclaration of %qT as a non-template", t);
10713 error ("previous declaration %q+D", t);
10714 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
10717 /* Make injected friend class visible. */
10718 if (scope != ts_within_enclosing_non_class
10719 && hidden_name_p (TYPE_NAME (t)))
10721 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
10722 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
10724 if (TYPE_TEMPLATE_INFO (t))
10726 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
10727 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
10732 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
10736 xref_tag_from_type (tree old, tree id, tag_scope scope)
10738 enum tag_types tag_kind;
10740 if (TREE_CODE (old) == RECORD_TYPE)
10741 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
10743 tag_kind = union_type;
10745 if (id == NULL_TREE)
10746 id = TYPE_IDENTIFIER (old);
10748 return xref_tag (tag_kind, id, scope, false);
10751 /* Create the binfo hierarchy for REF with (possibly NULL) base list
10752 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
10753 access_* node, and the TREE_VALUE is the type of the base-class.
10754 Non-NULL TREE_TYPE indicates virtual inheritance.
10756 Returns true if the binfo hierarchy was successfully created,
10757 false if an error was detected. */
10760 xref_basetypes (tree ref, tree base_list)
10763 tree binfo, base_binfo;
10764 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
10765 unsigned max_bases = 0; /* Maximum direct bases. */
10767 tree default_access;
10768 tree igo_prev; /* Track Inheritance Graph Order. */
10770 if (ref == error_mark_node)
10773 /* The base of a derived class is private by default, all others are
10775 default_access = (TREE_CODE (ref) == RECORD_TYPE
10776 && CLASSTYPE_DECLARED_CLASS (ref)
10777 ? access_private_node : access_public_node);
10779 /* First, make sure that any templates in base-classes are
10780 instantiated. This ensures that if we call ourselves recursively
10781 we do not get confused about which classes are marked and which
10783 basep = &base_list;
10786 tree basetype = TREE_VALUE (*basep);
10788 if (!(processing_template_decl && uses_template_parms (basetype))
10789 && !complete_type_or_else (basetype, NULL))
10790 /* An incomplete type. Remove it from the list. */
10791 *basep = TREE_CHAIN (*basep);
10795 if (TREE_TYPE (*basep))
10797 if (CLASS_TYPE_P (basetype))
10798 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
10799 basep = &TREE_CHAIN (*basep);
10803 TYPE_MARKED_P (ref) = 1;
10805 /* The binfo slot should be empty, unless this is an (ill-formed)
10807 gcc_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref));
10808 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
10810 binfo = make_tree_binfo (max_bases);
10812 TYPE_BINFO (ref) = binfo;
10813 BINFO_OFFSET (binfo) = size_zero_node;
10814 BINFO_TYPE (binfo) = ref;
10818 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
10819 /* An aggregate cannot have baseclasses. */
10820 CLASSTYPE_NON_AGGREGATE (ref) = 1;
10822 if (TREE_CODE (ref) == UNION_TYPE)
10824 error ("derived union %qT invalid", ref);
10831 if (TYPE_FOR_JAVA (ref))
10833 error ("Java class %qT cannot have multiple bases", ref);
10840 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
10842 if (TYPE_FOR_JAVA (ref))
10844 error ("Java class %qT cannot have virtual bases", ref);
10849 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
10851 tree access = TREE_PURPOSE (base_list);
10852 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
10853 tree basetype = TREE_VALUE (base_list);
10855 if (access == access_default_node)
10856 access = default_access;
10858 if (PACK_EXPANSION_P (basetype))
10859 basetype = PACK_EXPANSION_PATTERN (basetype);
10860 if (TREE_CODE (basetype) == TYPE_DECL)
10861 basetype = TREE_TYPE (basetype);
10862 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
10864 error ("base type %qT fails to be a struct or class type",
10869 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
10870 TYPE_FOR_JAVA (ref) = 1;
10872 base_binfo = NULL_TREE;
10873 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
10875 base_binfo = TYPE_BINFO (basetype);
10876 /* The original basetype could have been a typedef'd type. */
10877 basetype = BINFO_TYPE (base_binfo);
10879 /* Inherit flags from the base. */
10880 TYPE_HAS_NEW_OPERATOR (ref)
10881 |= TYPE_HAS_NEW_OPERATOR (basetype);
10882 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
10883 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
10884 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
10885 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
10886 CLASSTYPE_DIAMOND_SHAPED_P (ref)
10887 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
10888 CLASSTYPE_REPEATED_BASE_P (ref)
10889 |= CLASSTYPE_REPEATED_BASE_P (basetype);
10892 /* We must do this test after we've seen through a typedef
10894 if (TYPE_MARKED_P (basetype))
10896 if (basetype == ref)
10897 error ("recursive type %qT undefined", basetype);
10899 error ("duplicate base type %qT invalid", basetype);
10903 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
10904 /* Regenerate the pack expansion for the bases. */
10905 basetype = make_pack_expansion (basetype);
10907 TYPE_MARKED_P (basetype) = 1;
10909 base_binfo = copy_binfo (base_binfo, basetype, ref,
10910 &igo_prev, via_virtual);
10911 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
10912 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
10914 BINFO_BASE_APPEND (binfo, base_binfo);
10915 BINFO_BASE_ACCESS_APPEND (binfo, access);
10918 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
10919 /* If we have space in the vbase vector, we must have shared at
10920 least one of them, and are therefore diamond shaped. */
10921 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
10923 /* Unmark all the types. */
10924 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
10925 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10926 TYPE_MARKED_P (ref) = 0;
10928 /* Now see if we have a repeated base type. */
10929 if (!CLASSTYPE_REPEATED_BASE_P (ref))
10931 for (base_binfo = binfo; base_binfo;
10932 base_binfo = TREE_CHAIN (base_binfo))
10934 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10936 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
10939 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
10941 for (base_binfo = binfo; base_binfo;
10942 base_binfo = TREE_CHAIN (base_binfo))
10943 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
10944 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
10953 /* Begin compiling the definition of an enumeration type.
10956 UNDERLYING_TYPE is the type that will be used as the storage for
10957 the enumeration type. This should be NULL_TREE if no storage type
10960 SCOPED_ENUM_P is true if this is a scoped enumeration type.
10962 Returns the type object, as yet incomplete.
10963 Also records info about it so that build_enumerator
10964 may be used to declare the individual values as they are read. */
10967 start_enum (tree name, tree underlying_type, bool scoped_enum_p)
10971 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
10973 /* If this is the real definition for a previous forward reference,
10974 fill in the contents in the same object that used to be the
10975 forward reference. */
10977 enumtype = lookup_and_check_tag (enum_type, name,
10978 /*tag_scope=*/ts_current,
10979 /*template_header_p=*/false);
10981 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
10983 error ("multiple definition of %q#T", enumtype);
10984 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
10985 /* Clear out TYPE_VALUES, and start again. */
10986 TYPE_VALUES (enumtype) = NULL_TREE;
10990 /* In case of error, make a dummy enum to allow parsing to
10992 if (enumtype == error_mark_node)
10993 name = make_anon_name ();
10995 enumtype = make_node (ENUMERAL_TYPE);
10996 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
10999 if (enumtype == error_mark_node)
11004 SET_SCOPED_ENUM_P (enumtype, 1);
11005 begin_scope (sk_scoped_enum, enumtype);
11007 /* [C++0x dcl.enum]p5:
11009 If not explicitly specified, the underlying type of a scoped
11010 enumeration type is int. */
11011 if (!underlying_type)
11012 underlying_type = integer_type_node;
11015 if (underlying_type)
11017 if (CP_INTEGRAL_TYPE_P (underlying_type))
11019 TYPE_MIN_VALUE (enumtype) = TYPE_MIN_VALUE (underlying_type);
11020 TYPE_MAX_VALUE (enumtype) = TYPE_MAX_VALUE (underlying_type);
11021 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11022 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11023 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11024 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11025 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11026 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11027 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11028 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11030 else if (!dependent_type_p (underlying_type))
11031 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11032 underlying_type, enumtype);
11038 /* After processing and defining all the values of an enumeration type,
11039 install their decls in the enumeration type and finish it off.
11040 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
11043 finish_enum (tree enumtype)
11052 bool use_short_enum;
11056 integer_type_kind itk;
11057 tree underlying_type = NULL_TREE;
11058 bool fixed_underlying_type_p
11059 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11061 /* We built up the VALUES in reverse order. */
11062 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11064 /* For an enum defined in a template, just set the type of the values;
11065 all further processing is postponed until the template is
11066 instantiated. We need to set the type so that tsubst of a CONST_DECL
11068 if (processing_template_decl)
11070 for (values = TYPE_VALUES (enumtype);
11072 values = TREE_CHAIN (values))
11073 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11074 if (at_function_scope_p ())
11075 add_stmt (build_min (TAG_DEFN, enumtype));
11076 if (SCOPED_ENUM_P (enumtype))
11081 /* Determine the minimum and maximum values of the enumerators. */
11082 if (TYPE_VALUES (enumtype))
11084 minnode = maxnode = NULL_TREE;
11086 for (values = TYPE_VALUES (enumtype);
11088 values = TREE_CHAIN (values))
11090 decl = TREE_VALUE (values);
11092 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11093 each enumerator has the type of its enumeration. Prior to the
11094 closing brace, the type of each enumerator is the type of its
11095 initializing value. */
11096 TREE_TYPE (decl) = enumtype;
11098 /* Update the minimum and maximum values, if appropriate. */
11099 value = DECL_INITIAL (decl);
11100 if (value == error_mark_node)
11101 value = integer_zero_node;
11102 /* Figure out what the minimum and maximum values of the
11103 enumerators are. */
11105 minnode = maxnode = value;
11106 else if (tree_int_cst_lt (maxnode, value))
11108 else if (tree_int_cst_lt (value, minnode))
11115 If the enumerator-list is empty, the underlying type is as if
11116 the enumeration had a single enumerator with value 0. */
11117 minnode = maxnode = integer_zero_node;
11119 /* Compute the number of bits require to represent all values of the
11120 enumeration. We must do this before the type of MINNODE and
11121 MAXNODE are transformed, since tree_int_cst_min_precision relies
11122 on the TREE_TYPE of the value it is passed. */
11123 unsignedp = tree_int_cst_sgn (minnode) >= 0;
11124 lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11125 highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11126 precision = MAX (lowprec, highprec);
11128 if (!fixed_underlying_type_p)
11130 /* Determine the underlying type of the enumeration.
11134 The underlying type of an enumeration is an integral type that
11135 can represent all the enumerator values defined in the
11136 enumeration. It is implementation-defined which integral type is
11137 used as the underlying type for an enumeration except that the
11138 underlying type shall not be larger than int unless the value of
11139 an enumerator cannot fit in an int or unsigned int.
11141 We use "int" or an "unsigned int" as the underlying type, even if
11142 a smaller integral type would work, unless the user has
11143 explicitly requested that we use the smallest possible type. The
11144 user can request that for all enumerations with a command line
11145 flag, or for just one enumeration with an attribute. */
11147 use_short_enum = flag_short_enums
11148 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11150 for (itk = (use_short_enum ? itk_char : itk_int);
11154 underlying_type = integer_types[itk];
11155 if (TYPE_PRECISION (underlying_type) >= precision
11156 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11159 if (itk == itk_none)
11163 IF no integral type can represent all the enumerator values, the
11164 enumeration is ill-formed. */
11165 error ("no integral type can represent all of the enumerator values "
11166 "for %qT", enumtype);
11167 precision = TYPE_PRECISION (long_long_integer_type_node);
11168 underlying_type = integer_types[itk_unsigned_long_long];
11173 The value of sizeof() applied to an enumeration type, an object
11174 of an enumeration type, or an enumerator, is the value of sizeof()
11175 applied to the underlying type. */
11176 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
11177 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
11178 SET_TYPE_MODE (enumtype, TYPE_MODE (underlying_type));
11179 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
11180 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
11181 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
11183 /* Set the underlying type of the enumeration type to the
11184 computed enumeration type, restricted to the enumerator
11186 ENUM_UNDERLYING_TYPE (enumtype) = copy_node (underlying_type);
11187 set_min_and_max_values_for_integral_type
11188 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11191 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11193 /* Compute the minimum and maximum values for the type.
11197 For an enumeration where emin is the smallest enumerator and emax
11198 is the largest, the values of the enumeration are the values of the
11199 underlying type in the range bmin to bmax, where bmin and bmax are,
11200 respectively, the smallest and largest values of the smallest bit-
11201 field that can store emin and emax. */
11203 /* The middle-end currently assumes that types with TYPE_PRECISION
11204 narrower than their underlying type are suitably zero or sign
11205 extended to fill their mode. g++ doesn't make these guarantees.
11206 Until the middle-end can represent such paradoxical types, we
11207 set the TYPE_PRECISION to the width of the underlying type. */
11208 TYPE_PRECISION (enumtype) = TYPE_PRECISION (underlying_type);
11210 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
11212 /* Convert each of the enumerators to the type of the underlying
11213 type of the enumeration. */
11214 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11216 location_t saved_location;
11218 decl = TREE_VALUE (values);
11219 saved_location = input_location;
11220 input_location = DECL_SOURCE_LOCATION (decl);
11221 if (fixed_underlying_type_p)
11222 /* If the enumeration type has a fixed underlying type, we
11223 already checked all of the enumerator values. */
11224 value = DECL_INITIAL (decl);
11226 value = perform_implicit_conversion (underlying_type,
11227 DECL_INITIAL (decl),
11228 tf_warning_or_error);
11229 input_location = saved_location;
11231 /* Do not clobber shared ints. */
11232 value = copy_node (value);
11234 TREE_TYPE (value) = enumtype;
11235 DECL_INITIAL (decl) = value;
11238 /* Fix up all variant types of this enum type. */
11239 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
11241 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
11242 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
11243 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
11244 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
11245 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
11246 SET_TYPE_MODE (t, TYPE_MODE (enumtype));
11247 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
11248 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
11249 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
11250 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
11251 ENUM_UNDERLYING_TYPE (t) = ENUM_UNDERLYING_TYPE (enumtype);
11254 /* Finish up the scope of a scoped enumeration. */
11255 if (SCOPED_ENUM_P (enumtype))
11258 /* Finish debugging output for this type. */
11259 rest_of_type_compilation (enumtype, namespace_bindings_p ());
11262 /* Build and install a CONST_DECL for an enumeration constant of the
11263 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
11264 Assignment of sequential values by default is handled here. */
11267 build_enumerator (tree name, tree value, tree enumtype)
11273 /* If the VALUE was erroneous, pretend it wasn't there; that will
11274 result in the enum being assigned the next value in sequence. */
11275 if (value == error_mark_node)
11278 /* Remove no-op casts from the value. */
11280 STRIP_TYPE_NOPS (value);
11282 if (! processing_template_decl)
11284 /* Validate and default VALUE. */
11285 if (value != NULL_TREE)
11287 value = integral_constant_value (value);
11289 if (TREE_CODE (value) == INTEGER_CST)
11291 value = perform_integral_promotions (value);
11292 constant_expression_warning (value);
11296 error ("enumerator value for %qD is not an integer constant", name);
11301 /* Default based on previous value. */
11302 if (value == NULL_TREE)
11304 if (TYPE_VALUES (enumtype))
11307 unsigned HOST_WIDE_INT lo;
11311 /* The next value is the previous value plus one.
11312 add_double doesn't know the type of the target expression,
11313 so we must check with int_fits_type_p as well. */
11314 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
11315 if (error_operand_p (prev_value))
11316 value = error_mark_node;
11319 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
11320 TREE_INT_CST_HIGH (prev_value),
11322 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
11324 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
11328 error ("overflow in enumeration values at %qD", name);
11329 value = error_mark_node;
11334 value = integer_zero_node;
11337 /* Remove no-op casts from the value. */
11338 STRIP_TYPE_NOPS (value);
11340 /* If the underlying type of the enum is fixed, check whether
11341 the enumerator values fits in the underlying type. If it
11342 does not fit, the program is ill-formed [C++0x dcl.enum]. */
11343 if (ENUM_UNDERLYING_TYPE (enumtype)
11345 && TREE_CODE (value) == INTEGER_CST
11346 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
11348 error ("enumerator value %E is too large for underlying type %<%T%>",
11349 value, ENUM_UNDERLYING_TYPE (enumtype));
11351 /* Silently convert the value so that we can continue. */
11352 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
11357 /* C++ associates enums with global, function, or class declarations. */
11358 context = current_scope ();
11360 /* Build the actual enumeration constant. Note that the enumeration
11361 constants have the underlying type of the enum (if it is fixed)
11362 or the type of their initializer (if the underlying type of the
11363 enum is not fixed):
11367 If the underlying type is fixed, the type of each enumerator
11368 prior to the closing brace is the underlying type; if the
11369 initializing value of an enumerator cannot be represented by
11370 the underlying type, the program is ill-formed. If the
11371 underlying type is not fixed, the type of each enumerator is
11372 the type of its initializing value.
11374 If the underlying type is not fixed, it will be computed by
11375 finish_enum and we will reset the type of this enumerator. Of
11376 course, if we're processing a template, there may be no value. */
11377 type = value ? TREE_TYPE (value) : NULL_TREE;
11379 if (context && context == current_class_type)
11380 /* This enum declaration is local to the class. We need the full
11381 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
11382 decl = build_lang_decl (CONST_DECL, name, type);
11384 /* It's a global enum, or it's local to a function. (Note local to
11385 a function could mean local to a class method. */
11386 decl = build_decl (CONST_DECL, name, type);
11388 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
11389 TREE_CONSTANT (decl) = 1;
11390 TREE_READONLY (decl) = 1;
11391 DECL_INITIAL (decl) = value;
11393 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
11394 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
11395 on the TYPE_FIELDS list for `S'. (That's so that you can say
11396 things like `S::i' later.) */
11397 finish_member_declaration (decl);
11401 /* Add this enumeration constant to the list for this type. */
11402 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
11405 /* Look for an enumerator with the given NAME within the enumeration
11406 type ENUMTYPE. This routine is used primarily for qualified name
11407 lookup into an enumerator in C++0x, e.g.,
11409 enum class Color { Red, Green, Blue };
11411 Color color = Color::Red;
11413 Returns the value corresponding to the enumerator, or
11414 NULL_TREE if no such enumerator was found. */
11416 lookup_enumerator (tree enumtype, tree name)
11419 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
11421 e = purpose_member (name, TYPE_VALUES (enumtype));
11422 return e? TREE_VALUE (e) : NULL_TREE;
11426 /* We're defining DECL. Make sure that it's type is OK. */
11429 check_function_type (tree decl, tree current_function_parms)
11431 tree fntype = TREE_TYPE (decl);
11432 tree return_type = complete_type (TREE_TYPE (fntype));
11434 /* In a function definition, arg types must be complete. */
11435 require_complete_types_for_parms (current_function_parms);
11437 if (dependent_type_p (return_type))
11439 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
11440 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
11442 tree args = TYPE_ARG_TYPES (fntype);
11444 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
11445 error ("return type %q#T is incomplete", return_type);
11447 error ("return type has Java class type %q#T", return_type);
11449 /* Make it return void instead. */
11450 if (TREE_CODE (fntype) == METHOD_TYPE)
11451 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
11453 TREE_CHAIN (args));
11455 fntype = build_function_type (void_type_node, args);
11457 = build_exception_variant (fntype,
11458 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
11461 abstract_virtuals_error (decl, TREE_TYPE (fntype));
11464 /* Create the FUNCTION_DECL for a function definition.
11465 DECLSPECS and DECLARATOR are the parts of the declaration;
11466 they describe the function's name and the type it returns,
11467 but twisted together in a fashion that parallels the syntax of C.
11469 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
11470 DECLARATOR is really the DECL for the function we are about to
11471 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
11472 indicating that the function is an inline defined in-class.
11474 This function creates a binding context for the function body
11475 as well as setting up the FUNCTION_DECL in current_function_decl.
11477 For C++, we must first check whether that datum makes any sense.
11478 For example, "class A local_a(1,2);" means that variable local_a
11479 is an aggregate of type A, which should have a constructor
11480 applied to it with the argument list [1, 2].
11482 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
11483 or may be a BLOCK if the function has been defined previously
11484 in this translation unit. On exit, DECL_INITIAL (decl1) will be
11485 error_mark_node if the function has never been defined, or
11486 a BLOCK if the function has been defined somewhere. */
11489 start_preparsed_function (tree decl1, tree attrs, int flags)
11491 tree ctype = NULL_TREE;
11494 int doing_friend = 0;
11495 struct cp_binding_level *bl;
11496 tree current_function_parms;
11497 struct c_fileinfo *finfo
11498 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
11499 bool honor_interface;
11501 /* Sanity check. */
11502 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
11503 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
11505 fntype = TREE_TYPE (decl1);
11506 if (TREE_CODE (fntype) == METHOD_TYPE)
11507 ctype = TYPE_METHOD_BASETYPE (fntype);
11509 /* ISO C++ 11.4/5. A friend function defined in a class is in
11510 the (lexical) scope of the class in which it is defined. */
11511 if (!ctype && DECL_FRIEND_P (decl1))
11513 ctype = DECL_FRIEND_CONTEXT (decl1);
11515 /* CTYPE could be null here if we're dealing with a template;
11516 for example, `inline friend float foo()' inside a template
11517 will have no CTYPE set. */
11518 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
11524 if (DECL_DECLARED_INLINE_P (decl1)
11525 && lookup_attribute ("noinline", attrs))
11526 warning (0, "inline function %q+D given attribute noinline", decl1);
11528 /* Handle gnu_inline attribute. */
11529 if (GNU_INLINE_P (decl1))
11531 DECL_EXTERNAL (decl1) = 1;
11532 DECL_NOT_REALLY_EXTERN (decl1) = 0;
11533 DECL_INTERFACE_KNOWN (decl1) = 1;
11534 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
11537 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
11538 /* This is a constructor, we must ensure that any default args
11539 introduced by this definition are propagated to the clones
11540 now. The clones are used directly in overload resolution. */
11541 adjust_clone_args (decl1);
11543 /* Sometimes we don't notice that a function is a static member, and
11544 build a METHOD_TYPE for it. Fix that up now. */
11545 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
11546 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
11548 revert_static_member_fn (decl1);
11552 /* Set up current_class_type, and enter the scope of the class, if
11555 push_nested_class (ctype);
11556 else if (DECL_STATIC_FUNCTION_P (decl1))
11557 push_nested_class (DECL_CONTEXT (decl1));
11559 /* Now that we have entered the scope of the class, we must restore
11560 the bindings for any template parameters surrounding DECL1, if it
11561 is an inline member template. (Order is important; consider the
11562 case where a template parameter has the same name as a field of
11563 the class.) It is not until after this point that
11564 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
11565 if (flags & SF_INCLASS_INLINE)
11566 maybe_begin_member_template_processing (decl1);
11568 /* Effective C++ rule 15. */
11570 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
11571 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
11572 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
11574 /* Make the init_value nonzero so pushdecl knows this is not tentative.
11575 error_mark_node is replaced below (in poplevel) with the BLOCK. */
11576 if (!DECL_INITIAL (decl1))
11577 DECL_INITIAL (decl1) = error_mark_node;
11579 /* This function exists in static storage.
11580 (This does not mean `static' in the C sense!) */
11581 TREE_STATIC (decl1) = 1;
11583 /* We must call push_template_decl after current_class_type is set
11584 up. (If we are processing inline definitions after exiting a
11585 class scope, current_class_type will be NULL_TREE until set above
11586 by push_nested_class.) */
11587 if (processing_template_decl)
11589 /* FIXME: Handle error_mark_node more gracefully. */
11590 tree newdecl1 = push_template_decl (decl1);
11591 if (newdecl1 != error_mark_node)
11595 /* We are now in the scope of the function being defined. */
11596 current_function_decl = decl1;
11598 /* Save the parm names or decls from this function's declarator
11599 where store_parm_decls will find them. */
11600 current_function_parms = DECL_ARGUMENTS (decl1);
11602 /* Make sure the parameter and return types are reasonable. When
11603 you declare a function, these types can be incomplete, but they
11604 must be complete when you define the function. */
11605 check_function_type (decl1, current_function_parms);
11607 /* Build the return declaration for the function. */
11608 restype = TREE_TYPE (fntype);
11609 if (DECL_RESULT (decl1) == NULL_TREE)
11613 resdecl = build_decl (RESULT_DECL, 0, restype);
11614 DECL_ARTIFICIAL (resdecl) = 1;
11615 DECL_IGNORED_P (resdecl) = 1;
11616 DECL_RESULT (decl1) = resdecl;
11618 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
11621 /* Let the user know we're compiling this function. */
11622 announce_function (decl1);
11624 /* Record the decl so that the function name is defined.
11625 If we already have a decl for this name, and it is a FUNCTION_DECL,
11626 use the old decl. */
11627 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
11629 /* A specialization is not used to guide overload resolution. */
11630 if (!DECL_FUNCTION_MEMBER_P (decl1)
11631 && !(DECL_USE_TEMPLATE (decl1) &&
11632 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
11634 tree olddecl = pushdecl (decl1);
11636 if (olddecl == error_mark_node)
11637 /* If something went wrong when registering the declaration,
11638 use DECL1; we have to have a FUNCTION_DECL to use when
11639 parsing the body of the function. */
11643 /* Otherwise, OLDDECL is either a previous declaration
11644 of the same function or DECL1 itself. */
11646 if (warn_missing_declarations
11647 && olddecl == decl1
11648 && !DECL_MAIN_P (decl1)
11649 && TREE_PUBLIC (decl1)
11650 && !DECL_DECLARED_INLINE_P (decl1))
11654 /* Check whether DECL1 is in an anonymous
11656 for (context = DECL_CONTEXT (decl1);
11658 context = DECL_CONTEXT (context))
11660 if (TREE_CODE (context) == NAMESPACE_DECL
11661 && DECL_NAME (context) == NULL_TREE)
11665 if (context == NULL)
11666 warning (OPT_Wmissing_declarations,
11667 "no previous declaration for %q+D", decl1);
11675 /* We need to set the DECL_CONTEXT. */
11676 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
11677 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
11679 fntype = TREE_TYPE (decl1);
11681 /* If #pragma weak applies, mark the decl appropriately now.
11682 The pragma only applies to global functions. Because
11683 determining whether or not the #pragma applies involves
11684 computing the mangled name for the declaration, we cannot
11685 apply the pragma until after we have merged this declaration
11686 with any previous declarations; if the original declaration
11687 has a linkage specification, that specification applies to
11688 the definition as well, and may affect the mangled name. */
11689 if (!DECL_CONTEXT (decl1))
11690 maybe_apply_pragma_weak (decl1);
11693 /* Reset this in case the call to pushdecl changed it. */
11694 current_function_decl = decl1;
11696 gcc_assert (DECL_INITIAL (decl1));
11698 /* This function may already have been parsed, in which case just
11699 return; our caller will skip over the body without parsing. */
11700 if (DECL_INITIAL (decl1) != error_mark_node)
11703 /* Initialize RTL machinery. We cannot do this until
11704 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
11705 even when processing a template; this is how we get
11706 CFUN set up, and our per-function variables initialized.
11707 FIXME factor out the non-RTL stuff. */
11708 bl = current_binding_level;
11709 allocate_struct_function (decl1, processing_template_decl);
11711 /* Initialize the language data structures. Whenever we start
11712 a new function, we destroy temporaries in the usual way. */
11713 cfun->language = GGC_CNEW (struct language_function);
11714 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
11715 current_binding_level = bl;
11717 /* Even though we're inside a function body, we still don't want to
11718 call expand_expr to calculate the size of a variable-sized array.
11719 We haven't necessarily assigned RTL to all variables yet, so it's
11720 not safe to try to expand expressions involving them. */
11721 cfun->dont_save_pending_sizes_p = 1;
11723 /* Start the statement-tree, start the tree now. */
11724 DECL_SAVED_TREE (decl1) = push_stmt_list ();
11726 /* If we are (erroneously) defining a function that we have already
11727 defined before, wipe out what we knew before. */
11728 if (!DECL_PENDING_INLINE_P (decl1))
11729 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
11731 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
11733 /* We know that this was set up by `grokclassfn'. We do not
11734 wait until `store_parm_decls', since evil parse errors may
11735 never get us to that point. Here we keep the consistency
11736 between `current_class_type' and `current_class_ptr'. */
11737 tree t = DECL_ARGUMENTS (decl1);
11739 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
11740 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
11742 cp_function_chain->x_current_class_ref
11743 = cp_build_indirect_ref (t, NULL, tf_warning_or_error);
11744 cp_function_chain->x_current_class_ptr = t;
11746 /* Constructors and destructors need to know whether they're "in
11747 charge" of initializing virtual base classes. */
11748 t = TREE_CHAIN (t);
11749 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
11751 current_in_charge_parm = t;
11752 t = TREE_CHAIN (t);
11754 if (DECL_HAS_VTT_PARM_P (decl1))
11756 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
11757 current_vtt_parm = t;
11761 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
11762 /* Implicitly-defined methods (like the
11763 destructor for a class in which no destructor
11764 is explicitly declared) must not be defined
11765 until their definition is needed. So, we
11766 ignore interface specifications for
11767 compiler-generated functions. */
11768 && !DECL_ARTIFICIAL (decl1));
11770 if (DECL_INTERFACE_KNOWN (decl1))
11772 tree ctx = decl_function_context (decl1);
11774 if (DECL_NOT_REALLY_EXTERN (decl1))
11775 DECL_EXTERNAL (decl1) = 0;
11777 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
11778 && TREE_PUBLIC (ctx))
11779 /* This is a function in a local class in an extern inline
11781 comdat_linkage (decl1);
11783 /* If this function belongs to an interface, it is public.
11784 If it belongs to someone else's interface, it is also external.
11785 This only affects inlines and template instantiations. */
11786 else if (!finfo->interface_unknown && honor_interface)
11788 if (DECL_DECLARED_INLINE_P (decl1)
11789 || DECL_TEMPLATE_INSTANTIATION (decl1)
11790 || processing_template_decl)
11792 DECL_EXTERNAL (decl1)
11793 = (finfo->interface_only
11794 || (DECL_DECLARED_INLINE_P (decl1)
11795 && ! flag_implement_inlines
11796 && !DECL_VINDEX (decl1)));
11798 /* For WIN32 we also want to put these in linkonce sections. */
11799 maybe_make_one_only (decl1);
11802 DECL_EXTERNAL (decl1) = 0;
11803 DECL_INTERFACE_KNOWN (decl1) = 1;
11804 /* If this function is in an interface implemented in this file,
11805 make sure that the back end knows to emit this function
11807 if (!DECL_EXTERNAL (decl1))
11808 mark_needed (decl1);
11810 else if (finfo->interface_unknown && finfo->interface_only
11811 && honor_interface)
11813 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
11814 interface, we will have both finfo->interface_unknown and
11815 finfo->interface_only set. In that case, we don't want to
11816 use the normal heuristics because someone will supply a
11817 #pragma implementation elsewhere, and deducing it here would
11818 produce a conflict. */
11819 comdat_linkage (decl1);
11820 DECL_EXTERNAL (decl1) = 0;
11821 DECL_INTERFACE_KNOWN (decl1) = 1;
11822 DECL_DEFER_OUTPUT (decl1) = 1;
11826 /* This is a definition, not a reference.
11827 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
11828 if (!GNU_INLINE_P (decl1))
11829 DECL_EXTERNAL (decl1) = 0;
11831 if ((DECL_DECLARED_INLINE_P (decl1)
11832 || DECL_TEMPLATE_INSTANTIATION (decl1))
11833 && ! DECL_INTERFACE_KNOWN (decl1)
11834 /* Don't try to defer nested functions for now. */
11835 && ! decl_function_context (decl1))
11836 DECL_DEFER_OUTPUT (decl1) = 1;
11838 DECL_INTERFACE_KNOWN (decl1) = 1;
11841 /* Determine the ELF visibility attribute for the function. We must not
11842 do this before calling "pushdecl", as we must allow "duplicate_decls"
11843 to merge any attributes appropriately. We also need to wait until
11845 if (!DECL_CLONED_FUNCTION_P (decl1))
11846 determine_visibility (decl1);
11848 begin_scope (sk_function_parms, decl1);
11852 if (DECL_DESTRUCTOR_P (decl1)
11853 || (DECL_CONSTRUCTOR_P (decl1)
11854 && targetm.cxx.cdtor_returns_this ()))
11856 cdtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
11857 DECL_CONTEXT (cdtor_label) = current_function_decl;
11860 start_fname_decls ();
11862 store_parm_decls (current_function_parms);
11866 /* Like start_preparsed_function, except that instead of a
11867 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
11869 Returns 1 on success. If the DECLARATOR is not suitable for a function
11870 (it defines a datum instead), we return 0, which tells
11871 yyparse to report a parse error. */
11874 start_function (cp_decl_specifier_seq *declspecs,
11875 const cp_declarator *declarator,
11880 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
11881 if (decl1 == error_mark_node)
11883 /* If the declarator is not suitable for a function definition,
11884 cause a syntax error. */
11885 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
11887 error ("invalid function declaration");
11891 if (DECL_MAIN_P (decl1))
11892 /* main must return int. grokfndecl should have corrected it
11893 (and issued a diagnostic) if the user got it wrong. */
11894 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
11895 integer_type_node));
11897 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
11902 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
11906 use_eh_spec_block (tree fn)
11908 return (flag_exceptions && flag_enforce_eh_specs
11909 && !processing_template_decl
11910 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn))
11911 /* We insert the EH_SPEC_BLOCK only in the original
11912 function; then, it is copied automatically to the
11914 && !DECL_CLONED_FUNCTION_P (fn)
11915 /* Implicitly-generated constructors and destructors have
11916 exception specifications. However, those specifications
11917 are the union of the possible exceptions specified by the
11918 constructors/destructors for bases and members, so no
11919 unallowed exception will ever reach this function. By
11920 not creating the EH_SPEC_BLOCK we save a little memory,
11921 and we avoid spurious warnings about unreachable
11923 && !DECL_ARTIFICIAL (fn));
11926 /* Store the parameter declarations into the current function declaration.
11927 This is called after parsing the parameter declarations, before
11928 digesting the body of the function.
11930 Also install to binding contour return value identifier, if any. */
11933 store_parm_decls (tree current_function_parms)
11935 tree fndecl = current_function_decl;
11938 /* This is a chain of any other decls that came in among the parm
11939 declarations. If a parm is declared with enum {foo, bar} x;
11940 then CONST_DECLs for foo and bar are put here. */
11941 tree nonparms = NULL_TREE;
11943 if (current_function_parms)
11945 /* This case is when the function was defined with an ANSI prototype.
11946 The parms already have decls, so we need not do anything here
11947 except record them as in effect
11948 and complain if any redundant old-style parm decls were written. */
11950 tree specparms = current_function_parms;
11953 /* Must clear this because it might contain TYPE_DECLs declared
11955 current_binding_level->names = NULL;
11957 /* If we're doing semantic analysis, then we'll call pushdecl
11958 for each of these. We must do them in reverse order so that
11959 they end in the correct forward order. */
11960 specparms = nreverse (specparms);
11962 for (parm = specparms; parm; parm = next)
11964 next = TREE_CHAIN (parm);
11965 if (TREE_CODE (parm) == PARM_DECL)
11967 if (DECL_NAME (parm) == NULL_TREE
11968 || TREE_CODE (parm) != VOID_TYPE)
11971 error ("parameter %qD declared void", parm);
11975 /* If we find an enum constant or a type tag,
11976 put it aside for the moment. */
11977 TREE_CHAIN (parm) = NULL_TREE;
11978 nonparms = chainon (nonparms, parm);
11982 /* Get the decls in their original chain order and record in the
11983 function. This is all and only the PARM_DECLs that were
11984 pushed into scope by the loop above. */
11985 DECL_ARGUMENTS (fndecl) = getdecls ();
11988 DECL_ARGUMENTS (fndecl) = NULL_TREE;
11990 /* Now store the final chain of decls for the arguments
11991 as the decl-chain of the current lexical scope.
11992 Put the enumerators in as well, at the front so that
11993 DECL_ARGUMENTS is not modified. */
11994 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
11996 if (use_eh_spec_block (current_function_decl))
11997 current_eh_spec_block = begin_eh_spec_block ();
12001 /* We have finished doing semantic analysis on DECL, but have not yet
12002 generated RTL for its body. Save away our current state, so that
12003 when we want to generate RTL later we know what to do. */
12006 save_function_data (tree decl)
12008 struct language_function *f;
12010 /* Save the language-specific per-function data so that we can
12011 get it back when we really expand this function. */
12012 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12015 f = GGC_NEW (struct language_function);
12016 memcpy (f, cp_function_chain, sizeof (struct language_function));
12017 DECL_SAVED_FUNCTION_DATA (decl) = f;
12019 /* Clear out the bits we don't need. */
12020 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12021 f->bindings = NULL;
12022 f->x_local_names = NULL;
12026 /* Set the return value of the constructor (if present). */
12029 finish_constructor_body (void)
12034 if (targetm.cxx.cdtor_returns_this ()
12035 && (! TYPE_FOR_JAVA (current_class_type)))
12037 /* Any return from a constructor will end up here. */
12038 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
12040 val = DECL_ARGUMENTS (current_function_decl);
12041 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12042 DECL_RESULT (current_function_decl), val);
12043 /* Return the address of the object. */
12044 exprstmt = build_stmt (RETURN_EXPR, val);
12045 add_stmt (exprstmt);
12049 /* Do all the processing for the beginning of a destructor; set up the
12050 vtable pointers and cleanups for bases and members. */
12053 begin_destructor_body (void)
12055 tree compound_stmt;
12057 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12058 issued an error message. We still want to try to process the
12059 body of the function, but initialize_vtbl_ptrs will crash if
12060 TYPE_BINFO is NULL. */
12061 if (COMPLETE_TYPE_P (current_class_type))
12063 compound_stmt = begin_compound_stmt (0);
12064 /* Make all virtual function table pointers in non-virtual base
12065 classes point to CURRENT_CLASS_TYPE's virtual function
12067 initialize_vtbl_ptrs (current_class_ptr);
12068 finish_compound_stmt (compound_stmt);
12070 /* And insert cleanups for our bases and members so that they
12071 will be properly destroyed if we throw. */
12072 push_base_cleanups ();
12076 /* At the end of every destructor we generate code to delete the object if
12077 necessary. Do that now. */
12080 finish_destructor_body (void)
12084 /* Any return from a destructor will end up here; that way all base
12085 and member cleanups will be run when the function returns. */
12086 add_stmt (build_stmt (LABEL_EXPR, cdtor_label));
12088 /* In a virtual destructor, we must call delete. */
12089 if (DECL_VIRTUAL_P (current_function_decl))
12092 tree virtual_size = cxx_sizeof (current_class_type);
12096 At the point of definition of a virtual destructor (including
12097 an implicit definition), non-placement operator delete shall
12098 be looked up in the scope of the destructor's class and if
12099 found shall be accessible and unambiguous. */
12100 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12102 /*global_p=*/false,
12103 /*placement=*/NULL_TREE,
12104 /*alloc_fn=*/NULL_TREE);
12106 if_stmt = begin_if_stmt ();
12107 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12108 current_in_charge_parm,
12111 finish_expr_stmt (exprstmt);
12112 finish_then_clause (if_stmt);
12113 finish_if_stmt (if_stmt);
12116 if (targetm.cxx.cdtor_returns_this ())
12120 val = DECL_ARGUMENTS (current_function_decl);
12121 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12122 DECL_RESULT (current_function_decl), val);
12123 /* Return the address of the object. */
12124 exprstmt = build_stmt (RETURN_EXPR, val);
12125 add_stmt (exprstmt);
12129 /* Do the necessary processing for the beginning of a function body, which
12130 in this case includes member-initializers, but not the catch clauses of
12131 a function-try-block. Currently, this means opening a binding level
12132 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12135 begin_function_body (void)
12139 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12142 if (processing_template_decl)
12143 /* Do nothing now. */;
12145 /* Always keep the BLOCK node associated with the outermost pair of
12146 curly braces of a function. These are needed for correct
12147 operation of dwarfout.c. */
12148 keep_next_level (true);
12150 stmt = begin_compound_stmt (BCS_FN_BODY);
12152 if (processing_template_decl)
12153 /* Do nothing now. */;
12154 else if (DECL_DESTRUCTOR_P (current_function_decl))
12155 begin_destructor_body ();
12160 /* Do the processing for the end of a function body. Currently, this means
12161 closing out the cleanups for fully-constructed bases and members, and in
12162 the case of the destructor, deleting the object if desired. Again, this
12163 is only meaningful for [cd]tors, since they are the only functions where
12164 there is a significant distinction between the main body and any
12165 function catch clauses. Handling, say, main() return semantics here
12166 would be wrong, as flowing off the end of a function catch clause for
12167 main() would also need to return 0. */
12170 finish_function_body (tree compstmt)
12172 if (compstmt == NULL_TREE)
12175 /* Close the block. */
12176 finish_compound_stmt (compstmt);
12178 if (processing_template_decl)
12179 /* Do nothing now. */;
12180 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12181 finish_constructor_body ();
12182 else if (DECL_DESTRUCTOR_P (current_function_decl))
12183 finish_destructor_body ();
12186 /* Given a function, returns the BLOCK corresponding to the outermost level
12187 of curly braces, skipping the artificial block created for constructor
12191 outer_curly_brace_block (tree fndecl)
12193 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12194 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12195 /* Skip the artificial function body block. */
12196 block = BLOCK_SUBBLOCKS (block);
12200 /* Finish up a function declaration and compile that function
12201 all the way to assembler language output. The free the storage
12202 for the function definition.
12204 FLAGS is a bitwise or of the following values:
12206 We just finished processing the body of an in-class inline
12207 function definition. (This processing will have taken place
12208 after the class definition is complete.) */
12211 finish_function (int flags)
12213 tree fndecl = current_function_decl;
12214 tree fntype, ctype = NULL_TREE;
12215 int inclass_inline = (flags & 2) != 0;
12218 /* When we get some parse errors, we can end up without a
12219 current_function_decl, so cope. */
12220 if (fndecl == NULL_TREE)
12221 return error_mark_node;
12223 gcc_assert (!defer_mark_used_calls);
12224 defer_mark_used_calls = true;
12226 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12227 && DECL_VIRTUAL_P (fndecl)
12228 && !processing_template_decl)
12230 tree fnclass = DECL_CONTEXT (fndecl);
12231 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12232 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12235 nested = function_depth > 1;
12236 fntype = TREE_TYPE (fndecl);
12238 /* TREE_READONLY (fndecl) = 1;
12239 This caused &foo to be of type ptr-to-const-function
12240 which then got a warning when stored in a ptr-to-function variable. */
12242 gcc_assert (building_stmt_tree ());
12243 /* The current function is being defined, so its DECL_INITIAL should
12244 be set, and unless there's a multiple definition, it should be
12245 error_mark_node. */
12246 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
12248 /* For a cloned function, we've already got all the code we need;
12249 there's no need to add any extra bits. */
12250 if (!DECL_CLONED_FUNCTION_P (fndecl))
12252 if (DECL_MAIN_P (current_function_decl))
12256 /* Make it so that `main' always returns 0 by default (or
12259 stmt = finish_return_stmt (integer_one_node);
12261 stmt = finish_return_stmt (integer_zero_node);
12263 /* Hack. We don't want the middle-end to warn that this
12264 return is unreachable, so put the statement on the
12267 location_t linezero = linemap_line_start (line_table, 0, 1);
12268 SET_EXPR_LOCATION (stmt, linezero);
12272 if (use_eh_spec_block (current_function_decl))
12273 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
12274 (TREE_TYPE (current_function_decl)),
12275 current_eh_spec_block);
12278 /* If we're saving up tree structure, tie off the function now. */
12279 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
12281 finish_fname_decls ();
12283 /* If this function can't throw any exceptions, remember that. */
12284 if (!processing_template_decl
12285 && !cp_function_chain->can_throw
12286 && !flag_non_call_exceptions
12287 && !DECL_REPLACEABLE_P (fndecl))
12288 TREE_NOTHROW (fndecl) = 1;
12290 /* This must come after expand_function_end because cleanups might
12291 have declarations (from inline functions) that need to go into
12292 this function's blocks. */
12294 /* If the current binding level isn't the outermost binding level
12295 for this function, either there is a bug, or we have experienced
12296 syntax errors and the statement tree is malformed. */
12297 if (current_binding_level->kind != sk_function_parms)
12299 /* Make sure we have already experienced errors. */
12300 gcc_assert (errorcount);
12302 /* Throw away the broken statement tree and extra binding
12304 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
12306 while (current_binding_level->kind != sk_function_parms)
12308 if (current_binding_level->kind == sk_class)
12309 pop_nested_class ();
12311 poplevel (0, 0, 0);
12314 poplevel (1, 0, 1);
12316 /* Statements should always be full-expressions at the outermost set
12317 of curly braces for a function. */
12318 gcc_assert (stmts_are_full_exprs_p ());
12320 /* Set up the named return value optimization, if we can. Candidate
12321 variables are selected in check_return_expr. */
12322 if (current_function_return_value)
12324 tree r = current_function_return_value;
12327 if (r != error_mark_node
12328 /* This is only worth doing for fns that return in memory--and
12329 simpler, since we don't have to worry about promoted modes. */
12330 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
12331 /* Only allow this for variables declared in the outer scope of
12332 the function so we know that their lifetime always ends with a
12333 return; see g++.dg/opt/nrv6.C. We could be more flexible if
12334 we were to do this optimization in tree-ssa. */
12335 && (outer = outer_curly_brace_block (fndecl))
12336 && chain_member (r, BLOCK_VARS (outer)))
12337 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
12339 current_function_return_value = NULL_TREE;
12342 /* Remember that we were in class scope. */
12343 if (current_class_name)
12344 ctype = current_class_type;
12346 /* Must mark the RESULT_DECL as being in this function. */
12347 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
12349 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
12350 to the FUNCTION_DECL node itself. */
12351 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
12353 /* Save away current state, if appropriate. */
12354 if (!processing_template_decl)
12355 save_function_data (fndecl);
12357 /* Complain if there's just no return statement. */
12358 if (warn_return_type
12359 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
12360 && !dependent_type_p (TREE_TYPE (fntype))
12361 && !current_function_returns_value && !current_function_returns_null
12362 /* Don't complain if we abort or throw. */
12363 && !current_function_returns_abnormally
12364 && !DECL_NAME (DECL_RESULT (fndecl))
12365 && !TREE_NO_WARNING (fndecl)
12366 /* Structor return values (if any) are set by the compiler. */
12367 && !DECL_CONSTRUCTOR_P (fndecl)
12368 && !DECL_DESTRUCTOR_P (fndecl))
12370 warning (OPT_Wreturn_type,
12371 "no return statement in function returning non-void");
12372 TREE_NO_WARNING (fndecl) = 1;
12375 /* Store the end of the function, so that we get good line number
12376 info for the epilogue. */
12377 cfun->function_end_locus = input_location;
12379 /* Genericize before inlining. */
12380 if (!processing_template_decl)
12382 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
12383 cp_genericize (fndecl);
12384 /* Clear out the bits we don't need. */
12385 f->x_current_class_ptr = NULL;
12386 f->x_current_class_ref = NULL;
12387 f->x_eh_spec_block = NULL;
12388 f->x_in_charge_parm = NULL;
12389 f->x_vtt_parm = NULL;
12390 f->x_return_value = NULL;
12391 f->bindings = NULL;
12392 f->extern_decl_map = NULL;
12394 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
12395 c_warn_unused_result (gimple_body (fndecl));
12397 /* Clear out the bits we don't need. */
12398 local_names = NULL;
12400 /* We're leaving the context of this function, so zap cfun. It's still in
12401 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
12403 current_function_decl = NULL;
12405 /* If this is an in-class inline definition, we may have to pop the
12406 bindings for the template parameters that we added in
12407 maybe_begin_member_template_processing when start_function was
12409 if (inclass_inline)
12410 maybe_end_member_template_processing ();
12412 /* Leave the scope of the class. */
12414 pop_nested_class ();
12420 /* Let the error reporting routines know that we're outside a
12421 function. For a nested function, this value is used in
12422 cxx_pop_function_context and then reset via pop_function_context. */
12423 current_function_decl = NULL_TREE;
12425 defer_mark_used_calls = false;
12426 if (deferred_mark_used_calls)
12431 for (i = 0; VEC_iterate (tree, deferred_mark_used_calls, i, decl); i++)
12433 VEC_free (tree, gc, deferred_mark_used_calls);
12439 /* Create the FUNCTION_DECL for a function definition.
12440 DECLSPECS and DECLARATOR are the parts of the declaration;
12441 they describe the return type and the name of the function,
12442 but twisted together in a fashion that parallels the syntax of C.
12444 This function creates a binding context for the function body
12445 as well as setting up the FUNCTION_DECL in current_function_decl.
12447 Returns a FUNCTION_DECL on success.
12449 If the DECLARATOR is not suitable for a function (it defines a datum
12450 instead), we return 0, which tells yyparse to report a parse error.
12452 May return void_type_node indicating that this method is actually
12453 a friend. See grokfield for more details.
12455 Came here with a `.pushlevel' .
12457 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
12458 CHANGES TO CODE IN `grokfield'. */
12461 start_method (cp_decl_specifier_seq *declspecs,
12462 const cp_declarator *declarator, tree attrlist)
12464 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
12467 if (fndecl == error_mark_node)
12468 return error_mark_node;
12470 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
12472 error ("invalid member function declaration");
12473 return error_mark_node;
12477 cplus_decl_attributes (&fndecl, attrlist, 0);
12479 /* Pass friends other than inline friend functions back. */
12480 if (fndecl == void_type_node)
12483 if (DECL_IN_AGGR_P (fndecl))
12485 if (DECL_CONTEXT (fndecl)
12486 && TREE_CODE (DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
12487 error ("%qD is already defined in class %qT", fndecl,
12488 DECL_CONTEXT (fndecl));
12489 return error_mark_node;
12492 check_template_shadow (fndecl);
12494 DECL_DECLARED_INLINE_P (fndecl) = 1;
12495 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
12497 /* We process method specializations in finish_struct_1. */
12498 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
12500 fndecl = push_template_decl (fndecl);
12501 if (fndecl == error_mark_node)
12505 if (! DECL_FRIEND_P (fndecl))
12507 if (TREE_CHAIN (fndecl))
12509 fndecl = copy_node (fndecl);
12510 TREE_CHAIN (fndecl) = NULL_TREE;
12514 finish_decl (fndecl, NULL_TREE, NULL_TREE);
12516 /* Make a place for the parms. */
12517 begin_scope (sk_function_parms, fndecl);
12519 DECL_IN_AGGR_P (fndecl) = 1;
12523 /* Go through the motions of finishing a function definition.
12524 We don't compile this method until after the whole class has
12527 FINISH_METHOD must return something that looks as though it
12528 came from GROKFIELD (since we are defining a method, after all).
12530 This is called after parsing the body of the function definition.
12531 STMTS is the chain of statements that makes up the function body.
12533 DECL is the ..._DECL that `start_method' provided. */
12536 finish_method (tree decl)
12538 tree fndecl = decl;
12543 if (decl == void_type_node)
12546 old_initial = DECL_INITIAL (fndecl);
12548 /* Undo the level for the parms (from start_method).
12549 This is like poplevel, but it causes nothing to be
12550 saved. Saving information here confuses symbol-table
12551 output routines. Besides, this information will
12552 be correctly output when this method is actually
12555 /* Clear out the meanings of the local variables of this level;
12556 also record in each decl which block it belongs to. */
12558 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
12560 if (DECL_NAME (link) != NULL_TREE)
12561 pop_binding (DECL_NAME (link), link);
12562 gcc_assert (TREE_CODE (link) != FUNCTION_DECL);
12563 DECL_CONTEXT (link) = NULL_TREE;
12566 poplevel (0, 0, 0);
12568 DECL_INITIAL (fndecl) = old_initial;
12570 /* We used to check if the context of FNDECL was different from
12571 current_class_type as another way to get inside here. This didn't work
12572 for String.cc in libg++. */
12573 if (DECL_FRIEND_P (fndecl))
12575 VEC_safe_push (tree, gc, CLASSTYPE_INLINE_FRIENDS (current_class_type),
12577 decl = void_type_node;
12584 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
12585 we can lay it out later, when and if its type becomes complete. */
12588 maybe_register_incomplete_var (tree var)
12590 gcc_assert (TREE_CODE (var) == VAR_DECL);
12592 /* Keep track of variables with incomplete types. */
12593 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
12594 && DECL_EXTERNAL (var))
12596 tree inner_type = TREE_TYPE (var);
12598 while (TREE_CODE (inner_type) == ARRAY_TYPE)
12599 inner_type = TREE_TYPE (inner_type);
12600 inner_type = TYPE_MAIN_VARIANT (inner_type);
12602 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
12603 /* RTTI TD entries are created while defining the type_info. */
12604 || (TYPE_LANG_SPECIFIC (inner_type)
12605 && TYPE_BEING_DEFINED (inner_type)))
12606 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
12610 /* Called when a class type (given by TYPE) is defined. If there are
12611 any existing VAR_DECLs whose type has been completed by this
12612 declaration, update them now. */
12615 complete_vars (tree type)
12617 tree *list = &incomplete_vars;
12619 gcc_assert (CLASS_TYPE_P (type));
12622 if (same_type_p (type, TREE_PURPOSE (*list)))
12624 tree var = TREE_VALUE (*list);
12625 tree type = TREE_TYPE (var);
12626 /* Complete the type of the variable. The VAR_DECL itself
12627 will be laid out in expand_expr. */
12628 complete_type (type);
12629 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
12630 /* Remove this entry from the list. */
12631 *list = TREE_CHAIN (*list);
12634 list = &TREE_CHAIN (*list);
12637 /* Check for pending declarations which may have abstract type. */
12638 complete_type_check_abstract (type);
12641 /* If DECL is of a type which needs a cleanup, build and return an
12642 expression to perform that cleanup here. Return NULL_TREE if no
12643 cleanup need be done. */
12646 cxx_maybe_build_cleanup (tree decl)
12652 /* Assume no cleanup is required. */
12653 cleanup = NULL_TREE;
12655 if (error_operand_p (decl))
12658 /* Handle "__attribute__((cleanup))". We run the cleanup function
12659 before the destructor since the destructor is what actually
12660 terminates the lifetime of the object. */
12661 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
12668 /* Get the name specified by the user for the cleanup function. */
12669 id = TREE_VALUE (TREE_VALUE (attr));
12670 /* Look up the name to find the cleanup function to call. It is
12671 important to use lookup_name here because that is what is
12672 used in c-common.c:handle_cleanup_attribute when performing
12673 initial checks on the attribute. Note that those checks
12674 include ensuring that the function found is not an overloaded
12675 function, or an object with an overloaded call operator,
12676 etc.; we can rely on the fact that the function found is an
12677 ordinary FUNCTION_DECL. */
12678 fn = lookup_name (id);
12679 arg = build_address (decl);
12681 cleanup = cp_build_function_call (fn, build_tree_list (NULL_TREE,
12683 tf_warning_or_error);
12685 /* Handle ordinary C++ destructors. */
12686 type = TREE_TYPE (decl);
12687 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
12689 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
12690 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
12691 && CLASSTYPE_VBASECLASSES (type));
12695 if (TREE_CODE (type) == ARRAY_TYPE)
12698 addr = build_address (decl);
12700 /* Optimize for space over speed here. */
12701 if (!has_vbases || flag_expensive_optimizations)
12702 flags |= LOOKUP_NONVIRTUAL;
12704 call = build_delete (TREE_TYPE (addr), addr,
12705 sfk_complete_destructor, flags, 0);
12707 cleanup = build_compound_expr (cleanup, call);
12715 /* When a stmt has been parsed, this function is called. */
12722 /* DECL was originally constructed as a non-static member function,
12723 but turned out to be static. Update it accordingly. */
12726 revert_static_member_fn (tree decl)
12729 tree function = TREE_TYPE (decl);
12730 tree args = TYPE_ARG_TYPES (function);
12732 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
12733 != TYPE_UNQUALIFIED)
12734 error ("static member function %q#D declared with type qualifiers", decl);
12736 args = TREE_CHAIN (args);
12737 tmp = build_function_type (TREE_TYPE (function), args);
12738 tmp = build_qualified_type (tmp, cp_type_quals (function));
12739 tmp = build_exception_variant (tmp,
12740 TYPE_RAISES_EXCEPTIONS (function));
12741 TREE_TYPE (decl) = tmp;
12742 if (DECL_ARGUMENTS (decl))
12743 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
12744 DECL_STATIC_FUNCTION_P (decl) = 1;
12747 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
12748 one of the language-independent trees. */
12750 enum cp_tree_node_structure_enum
12751 cp_tree_node_structure (union lang_tree_node * t)
12753 switch (TREE_CODE (&t->generic))
12755 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
12756 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
12757 case OVERLOAD: return TS_CP_OVERLOAD;
12758 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
12759 case PTRMEM_CST: return TS_CP_PTRMEM;
12760 case BASELINK: return TS_CP_BASELINK;
12761 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
12762 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
12763 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
12764 default: return TS_CP_GENERIC;
12768 /* Build the void_list_node (void_type_node having been created). */
12770 build_void_list_node (void)
12772 tree t = build_tree_list (NULL_TREE, void_type_node);
12777 cp_missing_noreturn_ok_p (tree decl)
12779 /* A missing noreturn is ok for the `main' function. */
12780 return DECL_MAIN_P (decl);
12783 /* Return the COMDAT group into which DECL should be placed. */
12786 cxx_comdat_group (tree decl)
12790 /* Virtual tables, construction virtual tables, and virtual table
12791 tables all go in a single COMDAT group, named after the primary
12793 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
12794 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
12795 /* For all other DECLs, the COMDAT group is the mangled name of the
12796 declaration itself. */
12799 while (DECL_THUNK_P (decl))
12801 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
12802 into the same section as the target function. In that case
12803 we must return target's name. */
12804 tree target = THUNK_TARGET (decl);
12805 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
12806 && DECL_SECTION_NAME (target) != NULL
12807 && DECL_ONE_ONLY (target))
12812 name = DECL_ASSEMBLER_NAME (decl);
12815 return IDENTIFIER_POINTER (name);
12818 #include "gt-cp-decl.h"