[gcc.git] / gcc / cp / ChangeLog

2013-04-11  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/54216
        * parser.c (cp_parser_enum_specifier): Check for empty
        anonymous enums and anonymous scoped enums.

2013-04-10  Jakub Jelinek  <jakub@redhat.com>

        PR c++/56895
        * typeck.c (cp_build_binary_op): Call fold_non_dependent_expr_sfinae
        first before calling maybe_constant_value for warn_for_div_by_zero
        or invalid shift count warning purposes.

2013-04-09  Jason Merrill  <jason@redhat.com>

        PR c++/25466
        * rtti.c (build_typeid): Check the address of the argument
        rather than looking for an INDIRECT_REF.

2013-04-04  Jason Merrill  <jason@redhat.com>

        PR c++/56838
        PR c++/17232
        * typeck2.c (abstract_virtuals_error_sfinae): Disable
        complete_type again.

2013-04-08  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/56871
        * decl.c (validate_constexpr_redeclaration): Allow an explicit
        specialization to be different wrt the constexpr specifier.

2013-04-06  Jason Merrill  <jason@redhat.com>

        * parser.c (cp_parser_std_attribute): Treat [[noreturn]] like GNU
        noreturn attribute.

2013-04-05  Ed Smith-Rowland  <3dw4rd@verizon.net>

        * parser.c (cp_parser_ref_qualifier_seq_opt): Move to
        cp_parser_ref_qualifier_opt.  Error if more than one ref-qual found.

2013-04-03  Jason Merrill  <jason@redhat.com>

        * cp-tree.h (FUNCTION_OR_METHOD_TYPE_CHECK): Remove.
        (TYPE_RAISES_EXCEPTIONS): Use FUNC_OR_METHOD_CHECK instead.
        (FUNCTION_REF_QUALIFIED, FUNCTION_RVALUE_QUALIFIED): Likewise.

        * mangle.c (write_type): When writing a function type with
        function-cv-quals, don't add the unqualified type as a
        substitution candidate.

2013-04-03  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/56815
        * typeck.c (cp_build_unary_op): Change -Wpointer-arith permerror to
        pedwarn.

2013-04-03  Jakub Jelinek  <jakub@redhat.com>

        PR debug/56819
        * tree.c (strip_typedefs): Copy NON_DEFAULT_TEMPLATE_ARGS_COUNT
        from args to new_args.
        (strip_typedefs_expr): Copy NON_DEFAULT_TEMPLATE_ARGS_COUNT from t to
        r instead of doing {S,G}ET_NON_DEFAULT_TEMPLATE_ARGS_COUNT.

2013-04-02  Jason Merrill  <jason@redhat.com>

        PR c++/56821
        * mangle.c (write_function_type): Mangle ref-qualifier.
        (write_nested_name): Likewise.
        (canonicalize_for_substitution): Preserve ref-qualifier.
        (write_type): Likewise.

        PR c++/34949
        * decl.c (begin_destructor_body): Clobber the object in a cleanup.

2013-04-02  Paolo Carlini  <paolo.carlini@oracle.com>

        * friend.c (do_friend): Use COMPLETE_OR_OPEN_TYPE_P.
        * pt.c (find_parameter_packs_r): Use TYPE_ALIAS_P and TYPE_TI_ARGS.
        (for_each_template_parm_r): Use TYPE_TI_ARGS.

2013-04-02  Paolo Carlini  <paolo.carlini@oracle.com>

        * cp-tree.h (TAGGED_TYPE_P): Remove.
        (IS_OVERLOAD_TYPE): Rename to OVERLOAD_TYPE_P, adjust.
        (TYPE_ANONYMOUS_P): Adjust.
        * call.c (build_new_op_1): Likewise.
        * class.c (find_abi_tags_r): Likewise.
        * decl.c (warn_misplaced_attr_for_class_type, start_decl,
        type_is_deprecated): Likewise.
        * decl2.c (grokfield, min_vis_r): Likewise.
        * pt.c (get_template_info): Likewise.
        * tree.c (handle_abi_tag_attribute): Likewise.

2013-04-01  Jason Merrill  <jason@redhat.com>

        * semantics.c (maybe_constant_value): Check
        instantiation_dependent_expression_p.
        * pt.c (build_non_dependent_expr): Don't check it here.

        PR c++/56772
        * init.c (build_new): Don't try to process an array initializer
        at template definition time.

        PR c++/56793
        * typeck.c (finish_class_member_access_expr): Handle enum scope.

        PR c++/56794
        * parser.c (cp_parser_range_for): Don't try to do auto deduction
        in a template if the type of the range is incomplete.

        * call.c (add_function_candidate): Take the address of 'this' here.
        (build_over_call): And here.
        (build_new_method_call_1, build_op_call_1): Not here.
        (build_user_type_conversion_1): Or here.
        (add_candidates): Adjust.

        * cxx-pretty-print.h (pp_cxx_cv_qualifiers): New.
        * class.c (same_signature_p): Use type_memfn_quals.
        * cp-tree.h (TYPE_RAISES_EXCEPTIONS): Use
        FUNCTION_OR_METHOD_TYPE_CHECK.
        * error.c (dump_type_suffix): Add padding before cv-qualifiers.
        * pt.c (unify): Use static_fn_type.

2013-04-01  Bronek Kozicki <b.kozicki@gmail.com>
            Jason Merrill  <jason@redhat.com>

        Implement N2439 (ref-qualifiers for 'this')
        * cp-tree.h (FUNCTION_REF_QUALIFIED): New.
        (FUNCTION_RVALUE_QUALIFIED): New.
        (FUNCTION_OR_METHOD_TYPE_CHECK): New.
        (cpp0x_warn_str): Add CPP0X_REF_QUALIFIER.
        (cp_ref_qualifier): New enum.
        (cp_declarator): Add ref_qualifier.
        * parser.c (cp_parser_ref_qualifier_seq_opt): New.
        (cp_parser_direct_declarator): Use it.
        (make_call_declarator): Adjust.
        (cp_parser_lambda_declarator_opt): Adjust.
        * call.c (add_function_candidate): Handle ref-qualifier overload
        resolution semantics.
        (standard_conversion): Adjust.
        * class.c (add_method, same_signature_p): Compare ref-qualifiers.
        * decl.c (grokdeclarator): Handle ref-qualifiers.
        (grokfndecl): Check for invalid ref-qualifiers.
        (static_fn_type, revert_static_member_fn): Adjust.
        * decl2.c (build_memfn_type): Handle ref-qualifiers.
        (check_classfn): Check them.
        (cp_reconstruct_complex_type): Retain them.
        * error.c (dump_ref_qualifier): New.
        (dump_type_suffix, dump_function_decl): Use it.
        (maybe_warn_cpp0x): Handle CPP0X_REF_QUALIFIER.
        * pt.c (tsubst, tsubst_function_type): Instantiate ref-quals.
        (unify): Retain them.
        * tree.c (cp_check_qualified_type): New.
        (cp_build_qualified_type_real): Keep exception spec and ref-qual.
        (build_ref_qualified_type): New.
        (strip_typedefs, build_exception_variant): Keep ref-qualifier.
        (cp_build_type_attribute_variant): Keep ref-qualifier.
        * typeck.c (merge_types): Keep ref-qualifier.
        (structural_comptypes): Compare ref-qualifier.
        (type_memfn_rqual): New.
        (apply_memfn_quals): Take ref-qual argument.
        * typeck2.c (build_m_component_ref): Check ref-qualifier.

2013-04-01  Paolo Carlini  <paolo.carlini@oracle.com>

        * cp-tree.h (DECL_UNBOUND_CLASS_TEMPLATE_P): Remove.
        (DECL_FUNCTION_TEMPLATE_P): Adjust.

        * cxx-pretty-print.c (pp_cxx_nested_name_specifier,
        pp_cxx_qualified_id): Use get_containing_scope.
        * parser.c (cp_parser_class_head): Likewise.
        * pt.c (push_template_decl_real): Likewise.

        * decl2.c (import_export_decl): Use DECL_TEMPLOID_INSTANTIATION.
        * pt.c (unify): Use CP_INTEGRAL_TYPE_P.

2013-03-31  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl2.c (collect_candidates_for_java_method_aliases): Use
        DECL_CLASS_SCOPE_P.
        * name-lookup.c (pushtag_1) Use TYPE_FUNCTION_SCOPE_P.
        (pushdecl_maybe_friend_1): Use DECL_DECLARES_FUNCTION_P.
        * decl.c (duplicate_decls): Likewise.
        * parser.c (cp_parser_template_declaration_after_export): Likewise,
        also DECL_DECLARES_TYPE_P.
        * pt.c (instantiate_class_template_1): Likewise.
        * search.c (lookup_field_1): Use DECL_DECLARES_TYPE_P.
        (lookup_field_r): Likewise.
        (friend_accessible_p): Use DECL_DECLARES_FUNCTION_P.
        (lookup_fnfields_slot_nolazy): Likewise.
        * semantics.c (finish_member_declaration): Likewise.
        * typeck.c (convert_for_initialization): Use TYPE_REFFN_P.

2013-03-29  Gabriel Dos Reis  <gdr@integrable-solutions.net>

        * pt.c (template_parms_to_args): Fix typo in comment.

2013-03-29  Paolo Carlini  <paolo.carlini@oracle.com>

        * call.c (build_op_call_1): Use TYPE_PTRFN_P and TYPE_REFFN_P.

2013-03-29  Paolo Carlini  <paolo.carlini@oracle.com>

        * call.c (add_builtin_candidate): Use TYPE_PTR_P and VOID_TYPE_P.
        (build_op_call_1): Likewise.
        (build_over_call): Likewise.
        (compare_ics): Likewise.
        * class.c (build_base_path): Likewise.
        (resolve_address_of_overloaded_function): Likewise.
        * cp-tree.h: Likewise.
        * cvt.c (cp_convert_to_pointer): Likewise.
        (convert_to_reference): Likewise.
        (ocp_convert): Likewise.
        (convert_force): Likewise, tidy.
        * cxx-pretty-print.c (pp_cxx_postfix_expression): Likewise.
        (pp_cxx_ptr_operator): Likewise.
        * decl.c (duplicate_decls): Likewise.
        (start_decl): Likewise.
        (grok_op_properties): Likewise.
        (start_preparsed_function): Likewise.
        (store_parm_decls): Likewise.
        (finish_function): Likewise.
        * decl2.c (delete_sanity): Likewise.
        (acceptable_java_type): Likewise.
        (grokbitfield): Likewise.
        (cp_reconstruct_complex_type): Likewise.
        * error.c (dump_type_prefix): Likewise.
        (dump_expr): Likewise.
        * except.c (push_eh_cleanup): Likewise.
        (complete_ptr_ref_or_void_ptr_p): Likewise.
        (can_convert_eh): Likewise.
        * init.c (build_new_1): Likewise.
        (build_delete): Likewise.
        (build_vec_delete): Likewise.
        * mangle.c (write_type): Likewise.
        * parser.c (lookup_literal_operator): Likewise.
        * pt.c (convert_nontype_argument_function): Likewise.
        (convert_nontype_argument): Likewise.
        (tsubst): Likewise.
        (unify): Likewise.
        (dependent_type_p_r): Likewise.
        * rtti.c (build_headof): Likewise.
        (build_typeid): Likewise.
        (build_dynamic_cast_1): Likewise.
        (target_incomplete_p): Likewise.
        (typeinfo_in_lib_p): Likewise.
        * semantics.c (finish_omp_for): Likewise.
        (cxx_eval_call_expression): Likewise.
        (maybe_resolve_dummy): Likewise.
        * tree.c (build_target_expr): Likewise.
        (cp_build_qualified_type_real): Likewise.
        * typeck.c (composite_pointer_type_r): Likewise.
        (composite_pointer_type): Likewise.
        (comp_except_types): Likewise.
        (cxx_sizeof_nowarn): Likewise.
        (string_conv_p): Likewise.
        (cp_build_array_ref): Likewise.
        (cp_build_function_call_vec): Likewise, also use TYPE_PTRFN_P.
        (pointer_diff): Likewise.
        (cp_build_addr_expr_1): Likewise.
        (cp_build_unary_op): Likewise.
        (build_static_cast_1): Likewise.
        (cp_build_c_cast): Likewise.
        (comp_ptr_ttypes_real): Likewise.
        (ptr_reasonably_similar): Likewise.
        (comp_ptr_ttypes_const): Likewise.
        (casts_away_constness): Likewise.
        (check_literal_operator_args): Likewise.
        * typeck2.c (build_x_arrow): Likewise.
        (add_exception_specifier): Likewise.

2013-03-29  Jason Merrill  <jason@redhat.com>

        N3582
        * cp-tree.h (AUTO_IS_DECLTYPE): New.
        * parser.c (cp_parser_decltype): Handle decltype(auto).
        (cp_parser_type_id_1): Allow auto without a late-specified
        return in C++1y.
        (cp_parser_primary_expression): Use the return value of
        finish_parenthesized_expr.
        (cp_parser_transaction_expression): Likewise.
        * semantics.c (force_paren_expr): New.
        (finish_parenthesized_expr): Use it.
        * call.c (build_conditional_expr_1): Likewise.
        * pt.c (do_auto_deduction): Handle decltype(auto).
        (tsubst_copy): Handle PAREN_EXPR.
        (tsubst_copy_and_build): Likewise.
        * error.c (dump_expr): Handle PAREN_EXPR.
        * cxx-pretty-print.c (pp_cxx_expression): Likewise.
        * mangle.c (write_expression): Ignore PAREN_EXPR.

        * parser.c (cp_parser_decltype_expr): Split out...
        (cp_parser_decltype): ...from here.

        PR c++/56774
        PR c++/35722
        * pt.c (unify_pack_expansion): Fix indexing.

2013-03-29  Gabriel Dos Reis  <gdr@integrable-solutions.net>

        * call.c (build_java_interface_fn_ref): Likewise.
        (make_temporary_var_for_ref_to_temp): Likewise.
        * class.c (check_field_decls): Likewise.
        (layout_class_type): Likewise.
        (finish_struct_1): Likewise.
        (fixed_type_or_null): Likewise.
        (get_vtbl_decl_for_binfo): Likewise.
        * cp-gimplify.c (omp_var_to_track): Likewise.
        (cp_genericize_r): Likewise.
        * cp-objcp-common.c (cxx_warn_unused_global_decl): Likewise.
        * cp-tree.h (LANG_DECL_HAS_MIN): Likewise.
        (DECL_DISCRIMINATOR_P): Likewise.
        * decl.c (poplevel): Likewise.
        (decls_match): Likewise.
        (duplicate_decls): Likewise.
        (decl_jump_unsafe): Likewise.
        (start_decl): Likewise.
        (check_for_uninitialized_const_var): Likewise.
        (make_rtl_for_nonlocal_decl): Likewise.
        (cp_finish_decl): Likewise.
        (expand_static_init): Likewise.
        (local_variable_p): Likewise.
        (maybe_register_incomplete_var): Likewise.
        * decl2.c (grokfield): Likewise.
        (comdat_linkage): Likewise.
        (determine_visibility): Likewise.
        (import_export_decl): Likewise.
        (prune_vars_needing_no_initialization): Likewise.
        (decl_maybe_constant_var_p): Likewise.
        * error.c (dump_simple_decl): Likewise.
        (dump_template_decl): Likewise.
        (cp_printer): Likewise.
        * except.c (build_throw): Likewise.
        * init.c (build_vtbl_address): Likewise.
        (member_init_ok_or_else): Likewise.
        (build_aggr_init): Likewise.
        (expand_aggr_init_1): Likewise.
        (build_offset_ref): Likewise.
        (constant_value_1): Likewise.
        * mangle.c (write_mangled_name): Likewise.
        (write_prefix): Likewise.
        * name-lookup.c (supplement_binding_1): Likewise.
        (add_decl_to_level): Likewise.
        (pushdecl_maybe_friend_1): Likewise.
        (check_for_out_of_scope_variable): Likewise.
        (validate_nonmember_using_decl): Likewise.
        (lookup_name_innermost_nonclass_level_1): Likewise.
        (lookup_arg_dependent_1): Likewise.
        * parser.c (cp_parser_lambda_introducer): Likewise.
        (cp_parser_template_argument): Likewise.
        (cp_parser_single_declaration): Likewise.
        * pt.c (convert_nontype_argument): Likewise.
        (instantiate_class_template_1): Likewise.
        (tsubst_decl): Likewise.
        (tsubst_expr): Likewise.
        (do_decl_instantiation): Likewise.
        (do_type_instantiation): Likewise.
        (regenerate_decl_from_template): Likewise.
        (always_instantiate_p): Likewise.
        (instantiate_decl): Likewise.
        (type_dependent_expression_p): Likewise.
        (build_non_dependent_expr): Likewise.
        * repo.c (repo_emit_p): Likewise.
        * rtti.c (build_dynamic_cast_1): Likewise.
        * search.c (shared_member_p): Likewise.
        * semantics.c (outer_var_p): Likewise.
        (finish_id_expression): Likewise.
        (finish_omp_clauses): Likewise.
        (finish_decltype_type): Likewise.
        (ensure_literal_type_for_constexpr_object): Likewise.
        * tree.c (lvalue_kind): Likewise.
        (bot_replace): Likewise.
        (cp_tree_equal): Likewise.
        (handle_init_priority_attribute): Likewise.
        (decl_storage_duration): Likewise.
        * typeck.c (cxx_sizeof_expr): Likewise.
        (cxx_alignof_expr): Likewise.
        (decay_conversion): Likewise.
        (build_class_member_access_expr): Likewise.
        (cp_build_array_ref): Likewise.
        (cxx_mark_addressable): Likewise.
        (maybe_warn_about_returning_address_of_local): Likewise.
        (check_return_expr): Likewise.
        * typeck2.c (cxx_readonly_error): Likewise.
        (abstract_virtuals_error_sfinae): Likewise.
        (cxx_incomplete_type_diagnostic): Likewise.

2013-03-28  Lawrence Crowl  <crowl@google.com>

        * Make-lang.in
        (CXX_PARSER_H): Add header dependence.
        * cp-tree.h
        (extern debug (cp_binding_level &)): New.
        (extern debug (cp_binding_level *)): New.
        * name-lookup.h
        (debug (cp_binding_level &)): New.
        (debug (cp_binding_level *)): New.
        * parser.c
        (debug (cp_parser &)): New.
        (debug (cp_parser *)): New.
        (debug (cp_token &)): New.
        (debug (cp_token *)): New.
        (debug (vec<cp_token, va_gc> &)): New.
        (debug (vec<cp_token, va_gc> *)): New.
        * parser.c: Add header dependence.
        (extern debug (cp_parser &)): New.
        (extern debug (cp_parser *)): New.
        (extern debug (cp_token &)): New.
        (extern debug (cp_token *)): New.
        (extern debug (vec<cp_token, va_gc> &)): New.
        (extern debug (vec<cp_token, va_gc> *)): New.

2013-03-28  Jason Merrill  <jason@redhat.com>

        PR c++/17232
        PR c++/52748
        * typeck2.c (abstract_virtuals_error_sfinae): Don't complete
        the type if tf_decltype is set.
        * pt.c (fn_type_unification): Add decltype_p parm.
        (get_bindings): Adjust.
        * cp-tree.h: Adjust.
        * class.c (resolve_address_of_overloaded_function): Adjust.
        * call.c (add_template_candidate_real, print_z_candidate): Adjust.

        PR c++/56679
        * parser.c (cp_parser_sizeof_pack): Split out from...
        (cp_parser_sizeof_operand): ...here.  Require (id).

        PR c++/56701
        * semantics.c (finish_this_expr): 'this' is an rvalue.
        * typeck.c (cp_build_indirect_ref): Handle NOP_EXPR of 'this'.

        PR c++/56710
        * semantics.c (finish_member_declaration): Don't push closure
        members.

        * name-lookup.c (pushdecl_maybe_friend_1): Use
        nonlambda_method_basetype and current_nonlambda_class_type.

        PR c++/56728
        * semantics.c (potential_constant_expression_1) [NOP_EXPR]: Reject
        conversion from integer to pointer.
        (cxx_eval_constant_expression): Likewise.
        (cxx_eval_indirect_ref): Use the folded operand if we still think
        this might be constant.

2013-03-28  Paolo Carlini  <paolo.carlini@oracle.com>
            Manuel Lopez-Ibanez  <manu@gcc.gnu.org>

        PR c++/56725
        * call.c (convert_like_real): Change series of two permerrors
        to permerror + inform (and likewise for two errors).
        (build_new_method_call_1): Likewise.
        * typeck.c (convert_for_initialization): Change additional
        warning or error to inform.

2013-03-28  Gabriel Dos Reis  <gdr@integrable-solutions.net>

        * cp-tree.h (next_aggr_init_expr_arg): Remove static specifier.
        (first_aggr_init_expr): Likewise.
        (more_aggr_init_expr_args_p): Likewise.
        (type_of_this_parm): Likewise.
        (class_of_this_parm): Likewise.
        * name-lookup.h (get_global_value_if_present): Likewise.
        (is_typename_at_global_scope): Likewise.

2013-03-28  Paolo Carlini  <paolo.carlini@oracle.com>

        * call.c (joust): Don't call inform for a permerror returning false.
        * parser.c (cp_parser_check_class_key): Likewise.
        * pt.c (tsubst_copy_and_build): Likewise.

2013-03-27  Jason Merrill  <jason@redhat.com>

        PR c++/56749
        * semantics.c (finish_qualified_id_expr): Return early
        for enum scope.

2013-03-26  Gabriel Dos Reis  <gdr@integrable-solutions.net>

        * call.c (build_new_method_call_1): Use INDIRECT_REF_P.
        * cvt.c (convert_to_void): Likewise.
        * error.c (dump_expr): Likewise.
        * mangle.c (write_expression): Likewise.
        * parser.c (cp_parser_template_argument): Likewise.
        * pt.c (convert_nontype_argument): Likewise.
        (tsubst_copy_and_build): Likewise.
        * rtti.c (build_typeid): Likewise.
        * semantics.c (finish_call_expr): Likewise.
        (finish_decltype_type): Likewise.
        (build_data_member_initialization): Likewise.
        * tree.c (is_dummy_object): Likewise.
        * typeck.c (decay_conversion): Likewise.
        (build_class_member_access_expr): Likewise.
        (cp_build_addr_expr_1): Likewise.
        (unary_complex_lvalue): Likewise.
        (check_return_expr): Likewise.
        * typeck2.c (cxx_readonly_error): Likewise.

2013-03-26  Jason Merrill  <jason@redhat.com>

        PR c++/52597
        * typeck.c (invalid_nonstatic_memfn_p): Use get_first_fn.  Take tree.
        * semantics.c (finish_decltype_type): Check it before type_unknown_p.
        * cp-tree.h: Adjust prototype.

        PR c++/45282
        * typeck2.c (build_m_component_ref): Handle prvalue object.

2013-03-26  Gabriel Dos Reis  <gdr@integrable-solutions.net>

        * cp-gimplify.c (cp_genericize_r): Use VAR_OR_FUNCTION_DECL_P.
        * decl.c (duplicate_decls): Likewise.
        (cp_finish_decl): Likewise.
        (check_class_member_definition_namespace): Likewise.
        * decl2.c (grokfield): Likewise.
        (decl_needed_p): Likewise.
        (import_export_decl): Likewise.
        (mark_used): Likewise.
        * name-lookup.c (pushdecl_maybe_friend_1): Likewise.
        * pt.c (push_access_scope): Likewise.
        (instantiate_decl): Likewise.
        * ptree.c (cxx_print_decl): Likewise.
        * repo.c (repo_emit_p): Likewise.
        * semantics.c (note_decl_for_pch): Likewise.
        * tree.c (decl_linkage): Likewise.

2013-03-26  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/55951
        * decl.c (check_array_designated_initializer): Handle CONST_DECL
        as ce->index.

2013-03-26  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokfndecl): Handle separately <inline> and <constexpr>
        error messages.

        * decl.c (grokdeclarator): Declare typedef_p and use it everywhere.

2013-03-25  Jason Merrill  <jason@redhat.com>

        PR c++/56699
        * semantics.c (maybe_resolve_dummy): Make sure that the enclosing
        class is derived from the type of the object.

        PR c++/52014
        * semantics.c (lambda_expr_this_capture): Don't capture 'this' in
        unevaluated context.

2013-03-25  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/56722
        * decl.c (cp_finish_decl): Check DECL_LANG_SPECIFIC before
        DECL_TEMPLATE_INSTANTIATION.

2013-03-22  Jason Merrill  <jason@redhat.com>

        PR c++/56684
        * pt.c (instantiation_dependent_r): Check DECL_INITIAL of VAR_DECL
        and CONST_DECL.

2013-03-21  Gabriel Dos Reis  <gdr@integrable-solutions.net>

        * cp-tree.h (identifier_p): New.
        * call.c: Throughout, call identifier_p insstead of direct
        comparaison of TREE_CODE against IDENTIFIER_NODE.
        * decl.c: Likewisse.
        * decl2.c: Likewise.
        * init.c: Likewise.
        * mangle.c: Likewise.
        * name-lookup.c: Likewise.
        * parser.c: Likewise.
        * pt.c: Likewise.
        * search.c: Likewise.
        * semantics.c: Likewise.
        * tree.c: Likewise.
        * typeck.c: Likewise.
        * typeck2.c: Likewise.

2013-03-21  Jakub Jelinek  <jakub@redhat.com>

        PR middle-end/48087
        * pt.c (convert_nontype_argument): Count werrorcount as warnings.
        * call.c (build_temp): Likewise.
        * method.c (synthesize_method): Likewise.
        * typeck.c (convert_for_initialization): Likewise.

2013-03-21  Marc Glisse  <marc.glisse@inria.fr>

        * call.c (build_conditional_expr_1): Fold VEC_COND_EXPR.

2013-03-21  Richard Biener  <rguenther@suse.de>

        * error.c (cp_printer): Use DECL_HAS_DEBUG_EXPR_P instead of
        DECL_DEBUG_EXPR_IS_FROM.  Guard properly.

2013-03-20  Jason Merrill  <jason@redhat.com>

        PR c++/56646
        * parser.c (cp_parser_late_return_type_opt): Save and restore
        current_class_ptr/ref.

        PR c++/54532
        * expr.c (cplus_expand_constant): Do nothing if the class is
        incomplete.
        * semantics.c (reduced_constant_expression_p): Allow PTRMEM_CST.
        * typeck2.c (store_init_value): Use reduced_constant_expression_p.
        * decl.c (maybe_register_incomplete_var): Handle PTRMEM_CST.
        (complete_vars): Likewise.

        * name-lookup.c (get_anonymous_namespace_name): Never use
        get_file_function_name.

        * pt.c (retrieve_specialization): Handle null tmpl argument.

        PR c++/17232
        PR c++/56642
        * pt.c (tsubst_decl): Check return value of register_specialization.
        * typeck2.c (abstract_virtuals_error_sfinae): Re-apply complete_type
        change.

2013-03-17  Jason Merrill  <jason@redhat.com>

        PR c++/54359
        PR c++/56639
        * parser.c (cp_parser_direct_declarator): Bail if we see a
        qualified-id not at namespace scope.

        PR c++/17232
        PR c++/56642
        * typeck2.c (abstract_virtuals_error_sfinae): Revert complete_type
        change for now.

2013-03-16  Jason Merrill  <jason@redhat.com>

        * decl.c (grokdeclarator): Assert that we won't see a pointer to
        METHOD_TYPE.

        PR c++/54277
        * cp-tree.h (WILDCARD_TYPE_P): Split out from...
        (MAYBE_CLASS_TYPE_P): ...here.
        * semantics.c (lambda_capture_field_type): Only build a
        magic decltype for wildcard types.
        (lambda_proxy_type): Likewise.
        (finish_non_static_data_member): Get the quals from
        the object.

        PR c++/55931
        * parser.c (cp_parser_template_argument): Don't
        fold_non_dependent_expr.

        * parser.c (cp_parser_lambda_declarator_opt): Use
        cp_parser_trailing_type_id.

        PR c++/45917
        * parser.c (cp_parser_template_id): Don't forget access checks.

        PR c++/52374
        * pt.c (tsubst_qualified_id): Use current_nonlambda_class_type.

        PR c++/54764
        PR c++/55972
        * name-lookup.h (tag_scope): Add ts_lambda.
        * semantics.c (begin_lambda_type): Use it.
        * decl.c (xref_tag_1): Set CLASSTYPE_LAMBDA_EXPR.
        * pt.c (check_default_tmpl_args): Ignore lambdas.
        (push_template_decl_real): Handle lambdas.
        * tree.c (no_linkage_check): Adjust lambda check.

        PR c++/56039
        * tree.c (strip_typedefs_expr): Complain about lambda, don't abort.

        PR c++/54359
        * parser.c (cp_parser_direct_declarator): Fix late return
        for out-of-class defn of member function.

        PR c++/55357
        * semantics.c (maybe_add_lambda_conv_op): Clear DECL_NAME of copied
        parms to avoid duplicate -Wshadow warnings.

        * search.c (lookup_base): Handle NULL_TREE.

        PR c++/56481
        * semantics.c (potential_constant_expression_1): Use of 'this' in
        a non-constexpr function makes the expression not potentially
        constant.

        N3276
        PR c++/52748
        * cp-tree.h (tsubst_flags): Add tf_decltype.
        * call.c (build_cxx_call): Don't build a temporary if it's set.
        (build_over_call): Make sure it's only passed to build_cxx_call.
        * parser.c (cp_parser_primary_expression): Add decltype_p parm.
        (cp_parser_unary_expression): Likewise.
        (cp_parser_cast_expression): Likewise.
        (cp_parser_binary_expression): Likewise.
        (cp_parser_assignment_expression): Likewise.
        (cp_parser_postfix_expression): Likewise.  Pass tf_decltype.
        (cp_parser_expression): Add decltype_p.  Force a
        temporary for a call on the LHS of a comma.
        (cp_parser_decltype): Pass true to decltype_p parms.
        * pt.c (tsubst) [DECLTYPE_TYPE]: Pass tf_decltype.
        (tsubst_copy_and_build): Pass tf_decltype down only for
        CALL_EXPR and the RHS of COMPOUND_EXPR.
        * tree.c (build_cplus_new): Call complete_type_or_maybe_complain.

        * cp-tree.h (abstract_class_use): New enum.
        * typeck2.c (pending_abstract_type): Add use field.
        (abstract_virtuals_error_sfinae): Add overloads taking
        abstract_class_use instead of tree.
        * typeck.c (build_static_cast_1): Call it.
        * except.c (is_admissible_throw_operand_or_catch_parameter): Call it.
        * pt.c: Adjust calls.
        * decl.c (cp_finish_decl): Don't handle functions specially.
        (grokdeclarator): Always check return type.
        * init.c (build_new_1): Adjust call.

        DR 337
        PR c++/17232
        * pt.c (tsubst) [ARRAY_TYPE]: Use abstract_virtuals_error_sfinae.
        * typeck2.c (abstract_virtuals_error_sfinae): Call complete_type.

        DR 657
        * pt.c (tsubst_function_type): Call abstract_virtuals_error_sfinae.
        (tsubst_arg_types): Likewise.

        DR 1518
        PR c++/54835
        * call.c (convert_like_real): Check for explicit constructors
        even for value-initialization.

        PR c++/54946
        * pt.c (convert_nontype_argument): Handle invalid pointer.

        * parser.c (cp_parser_lambda_expression): Use nreverse.

        PR c++/56447
        PR c++/55532
        * pt.c (instantiate_class_template_1): Instantiate lambda capture
        list here.
        (tsubst_copy_and_build): Not here.

        PR c++/55017
        * method.c (walk_field_subobs): Disallow copy of rvalue ref.

        PR c++/55240
        * parser.c (parsing_nsdmi): New.
        * semantics.c (outer_automatic_var_p): Check it.
        (finish_id_expression): Likewise.
        * cp-tree.h: Declare it.

        PR c++/55241
        * error.c (dump_expr) [SIZEOF_EXPR]: Print sizeof... properly.

        * parser.c (lookup_literal_operator): Correct parm/arg naming
        mixup.

        PR c++/56238
        * pt.c (fold_non_dependent_expr_sfinae): Check
        instantiation_dependent_expression_p.

        PR c++/56095
        * class.c (resolve_address_of_overloaded_function): Accept a
        reference to function for target_type.
        (instantiate_type): Likewise.
        * pt.c (convert_nontype_argument): Pass it to
        convert_nontype_argument_function.

2013-03-16  Jakub Jelinek  <jakub@redhat.com>

        * tree.c (cp_tree_equal): Fix a pasto.

        PR c++/56607
        * typeck.c (cp_build_binary_op): When calling warn_for_div_by_zero,
        pass op1 through maybe_constant_value first.

2013-03-16  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/56582
        * semantics.c (cxx_eval_array_reference): Check for negative index.

2013-03-14  Jason Merrill  <jason@redhat.com>

        PR c++/56614
        * decl.c (local_variable_p_walkfn): Check DECL_ARTIFICIAL again.

        PR c++/56346
        * decl.c (register_dtor_fn): Pass null to __cxa_thread_atexit
        dso_handle parm on targets without __cxa_atexit.

2013-03-11  Jason Merrill  <jason@redhat.com>

        PR c++/56567
        * typeck.c (check_return_expr): Disallow returning init list here.
        * semantics.c (apply_deduced_return_type): Not here.

2013-03-08  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/51412
        * cxx-pretty-print.c (pp_cxx_expression): Handle LAMBDA_EXPR.
        * error.c (dump_expr): Likewise.

2013-03-08  Jason Merrill  <jason@redhat.com>

        PR c++/51884
        * class.c (modify_all_vtables): Mangle the vtable name before
        entering dfs_walk.

        * semantics.c (lambda_expr_this_capture): In unevaluated context,
        just return the nearest 'this'.

        PR c++/51494
        PR c++/52183
        PR c++/56222
        * tree.c (maybe_dummy_object): Don't capture 'this'.
        * semantics.c (maybe_resolve_dummy): New.
        (finish_non_static_data_member): Use it.
        (finish_qualified_id_expr): Don't test is_dummy_object.
        * cp-tree.h: Declare maybe_resolve_dummy.
        * call.c (build_new_method_call_1): Use it.

        PR c++/56567
        * semantics.c (apply_deduced_return_type): Don't allow returning
        std::initializer_list.

2013-03-06  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/56534
        * parser.c (cp_parser_elaborated_type_specifier): Don't call
        check_elaborated_type_specifier when TREE_CODE (decl) != TYPE_DECL.
        * decl.c (check_elaborated_type_specifier): Tidy.

2013-03-06  Jakub Jelinek  <jakub@redhat.com>

        PR c++/56543
        * tree.c (strip_typedefs): Don't copy args if they are NULL.

2013-03-05  Jakub Jelinek  <jakub@redhat.com>

        * parser.c (cp_parser_braced_list): For {} initialize
        *non_constant_p to false.

2013-03-04  Jason Merrill  <jason@redhat.com>

        PR c++/56464
        PR c++/54383
        * semantics.c (lambda_expr_this_capture): Handle NSDMI
        and non-class scopes.

2013-03-01  Paolo Carlini  <paolo.carlini@oracle.com>

        * decl.c (grokdeclarator): Remove dead code.

2013-02-28  Jason Merrill  <jason@redhat.com>

        PR c++/56481
        * semantics.c (potential_constant_expression_1): Use
        cxx_eval_outermost_constant_expr rather than maybe_constant_value.

        PR c++/56243
        * call.c (build_over_call): Avoid virtual lookup in a template.

2013-02-27  Jason Merrill  <jason@redhat.com>

        PR c++/56358
        PR c++/56323
        * name-lookup.c (do_class_using_decl): Use ctor_identifier instead
        of the base name for inheriting ctors.
        (push_class_level_binding_1): Remove inheriting ctor handling.
        * pt.c (tsubst_decl) [USING_DECL]: Likewise.
        * class.c (add_implicitly_declared_members): Adjust.

2013-02-26  David Binderman  <dcb314@hotmail.com>

        PR c++/55632
        * decl.c (grokdeclarator): Tidy publicp assignment.

2013-02-25  Aldy Hernandez  <aldyh@redhat.com>

        PR c++/56419
        * semantics.c (begin_transaction_stmt): Set TREE_SIDE_EFFECTS.
        (build_transaction_expr): Same.

2013-02-25  Jason Merrill  <jason@redhat.com>

        PR c++/56377
        * pt.c (fn_type_unification): Wait to call push_tinst_level until
        we know what args we're looking at.

        PR c++/56438
        * semantics.c (potential_constant_expression_1): In C++98, a cast
        to non-integral type can't be a constant expression.

2013-02-24  Jakub Jelinek  <jakub@redhat.com>

        PR c++/56403
        * init.c (build_zero_init_1): Use RECORD_OR_UNION_CODE_P instead
        of CLASS_TYPE_P.

2013-02-22  Jason Merrill  <jason@redhat.com>

        PR c++/40405
        * pt.c (push_template_decl_real): Set DECL_INTERFACE_KNOWN
        if we got the wrong number of template parms.

        PR c++/56377
        * pt.c (fn_type_unification): Use explicit args in template
        instantiation context.

        PR c++/56359
        * call.c (can_convert_arg): Discard access checks.

        PR c++/56395
        * tree.c (strip_typedefs): Strip typedefs from TYPENAME_TYPE template
        args.

2013-02-20  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/56373
        * tree.c (maybe_warn_zero_as_null_pointer_constant): Add.
        * cvt.c (ocp_convert): Use the latter.
        (cp_convert_to_pointer): Likewise.
        * decl.c (check_default_argument): Likewise.
        * typeck.c (cp_build_binary_op): Likewise.
        * cp-tree.h (maybe_warn_zero_as_null_pointer_constant): Declare.

2013-02-15  Jonathan Wakely  <jwakely.gcc@gmail.com>
            Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/51242
        * decl2.c (grokbitfield): Allow scoped enumeration types.

2013-02-15  Jason Merrill  <jason@redhat.com>

        PR c++/54276
        * semantics.c (finish_id_expression): Also return the identifier
        for an outer local static.

        PR c++/56343
        * class.c (check_bases_and_members): Deduce noexcept after
        checking bases.

        PR c++/52026
        * semantics.c (finish_id_expression): In a template, return
        the identifier for a constant variable.

2013-02-14  Jason Merrill  <jason@redhat.com>

        PR c++/54922
        * semantics.c (build_anon_member_initialization): New.
        (build_data_member_initialization): Use it.

        PR c++/55003
        * decl.c (cp_finish_decl): Force instantiation of an
        auto static data member.

        PR c++/55220
        * pt.c (unify): A pack expansion that is not the last template
        argument makes the entire template argument list non-deduced.

        PR c++/56323
        * name-lookup.c (do_class_using_decl): Handle typedefs with
        inheriting constructors.
        (push_class_level_binding_1): Allow inheriting from template
        template parameter, too.
        * pt.c (tsubst_decl) [USING_DECL]: Likewise.

        PR c++/55223
        * pt.c (tsubst_copy_and_build) [LAMBDA_EXPR]: Fix handling of
        default argument scope.
        * mangle.c (write_name): Likewise.

        PR c++/55232
        * error.c (find_typenames_r): Don't walk into a pack expansion.

2013-02-13  Jason Merrill  <jason@redhat.com>

        PR c++/55670
        * parser.c (cp_parser_member_declaration): Check the declarator
        form when detecting a function declaration via typedef.

        PR c++/55680
        * pt.c (maybe_process_partial_specialization): A lambda
        isn't what's being specialized.

        PR c++/55710
        * semantics.c (maybe_add_lambda_conv_op): Mark static thunk
        TREE_USED.

        PR c++/55879
        * semantics.c (cxx_bind_parameters_in_call): Undo DECL_BY_REFERENCE.

        PR c++/55993
        * semantics.c (cxx_fold_indirect_ref): Handle empty bases at
        non-zero offsets, too.

        PR c++/56155
        * decl.c (build_enumerator): Always convert the value to a
        fixed underlying type.

        PR c++/56135
        * pt.c (tsubst_copy_and_build): Don't forget any new
        captures that arose from use of dependent names.

2013-02-13  Jakub Jelinek  <jakub@redhat.com>

        PR c++/56302
        * semantics.c (finish_asm_stmt): If input constraints allow
        neither register nor memory, try maybe_constant_value to get
        a constant if possible.

2013-02-12  Jason Merrill  <jason@redhat.com>

        PR c++/56285
        * method.c (add_one_base_init): Handle base constructor
        taking rvalue reference parm.

        PR c++/56291
        * semantics.c (sort_constexpr_mem_initializers): Handle
        vptr out of order.

2013-02-09  Jason Merrill  <jason@redhat.com>

        PR c++/56268
        * semantics.c (classtype_has_nothrow_assign_or_copy_p): Call
        maybe_instantiate_noexcept.

        PR c++/56247
        * pt.c (eq_specializations): Set comparing_specializations.
        * tree.c (cp_tree_equal): Check it.
        * cp-tree.h: Declare it.

        * decl.c (decls_match): Check versions later.

        PR c++/56238
        * pt.c (build_non_dependent_expr): Don't try to fold
        instantiation-dependent expressions.
        (instantiation_dependent_r) [TRAIT_EXPR]: Split out.
        [BIND_EXPR]: Treat as dependent.

2013-02-07  Jakub Jelinek  <jakub@redhat.com>

        PR c++/56241
        * init.c (build_vec_init): Don't append NULL values into new_vec.
        (build_zero_init_1): Don't push anything into v if recursive call
        returned NULL_TREE.
        (build_value_init_noctor): Don't push anything into v if
        build_value_init call returned NULL_TREE.

        PR c++/56239
        * parser.c (cp_parser_token_starts_cast_expression): Renamed to...
        (cp_parser_tokens_start_cast_expression): ... this.  Change parameter
        to cp_parser *, call cp_lexer_peek_token first.  For CPP_OPEN_PAREN,
        return true only if 2nd token isn't CPP_CLOSE_PAREN.
        (cp_parser_cast_expression): Adjust caller.

        PR c++/56237
        * decl.c (push_local_name): Look at DECL_DISCRIMINATOR (t)
        only if DECL_DISCRIMINATOR_SET_P (t) rather than just
        DECL_LANG_SPECIFIC (t).

2013-02-07  Jason Merrill  <jason@redhat.com>

        PR c++/56235
        * method.c (do_build_copy_constructor): Don't bother turning
        scalars from lvalues to xvalues.
        (do_build_copy_assign): Likewise.

2013-02-06  Jason Merrill  <jason@redhat.com>

        * parser.c (cp_parser_enum_specifier): Check for error_mark_node.

2013-02-05  Jason Merrill  <jason@redhat.com>

        PR c++/54122
        * tree.c (lvalue_kind) [INDIRECT_REF]: Don't check for
        METHOD_TYPE.

        PR c++/56177
        * decl.c (start_preparsed_function): Update restype if we change
        decl1.

        PR c++/56208
        * pt.c (fn_type_unification): Discard any access checks from
        substituting explicit args.

2013-01-31  Jason Merrill  <jason@redhat.com>

        PR c++/56162
        PR c++/56104
        * typeck.c (get_member_function_from_ptrfunc): Fix
        ptrmemfunc_vbit_in_delta case.

2013-01-29  Jason Merrill  <jason@redhat.com>

        PR libstdc++/54314
        * class.c (build_ctor_vtbl_group): Give construction vtables
        hidden visibility.

2013-01-25  Jason Merrill  <jason@redhat.com>

        PR c++/56095
        * pt.c (convert_nontype_argument_function): Handle invalid input.
        (convert_nontype_argument): Likewise.

        PR c++/56104
        * typeck.c (get_member_function_from_ptrfunc): Optimize if the
        dynamic type has no virtual functions.

2013-01-22  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/55944
        * decl.c (check_initializer): Use TARGET_EXPR_DIRECT_INIT_P only
        on TARGET_EXPR nodes.

2013-01-22  Jason Merrill  <jason@redhat.com>

        PR c++/56071
        * pt.c (maybe_instantiate_noexcept): Don't defer access checks.

2013-01-22  Dodji Seketeli  <dodji@redhat.com>

        PR c++/53609
        * pt.c (argument_pack_element_is_expansion_p)
        (make_argument_pack_select, use_pack_expansion_extra_args_p)
        (gen_elem_of_pack_expansion_instantiation): New static functions.
        (tsubst): When looking through an ARGUMENT_PACK_SELECT tree node,
        look through the possibly resulting pack expansion as well.
        (tsubst_pack_expansion): Use use_pack_expansion_extra_p to
        generalize when to use the PACK_EXPANSION_EXTRA_ARGS mechanism.
        Use gen_elem_of_pack_expansion_instantiation to build the
        instantiation piece-wise.  Don't use arg_from_parm_pack_p anymore,
        as gen_elem_of_pack_expansion_instantiation and the change in
        tsubst above generalize this particular case.
        (arg_from_parm_pack_p): Remove this for it's not used by
        tsubst_pack_expansion anymore.

2013-01-21  Jason Merrill  <jason@redhat.com>

        PR c++/56059
        * tree.c (strip_typedefs_expr) [TREE_VEC]: Preserve non-default
        template args count.

2013-01-18  Jason Merrill  <jason@redhat.com>

        PR target/54908
        * decl2.c (get_local_tls_init_fn): New.
        (get_tls_init_fn): Handle flag_extern_tls_init.  Don't bother
        with aliases for internal variables.  Don't use weakrefs if
        the variable needs destruction.
        (generate_tls_wrapper): Mark the wrapper as const if no
        initialization is needed.
        (handle_tls_init): Don't require aliases.

2013-01-15  Dodji Seketeli  <dodji@redhat.com>

        PR c++/55663
        * pt.c (coerce_innermost_template_parms): New static function.
        (instantiate_alias_template):  Use it here.

2013-01-09  Jason Merrill  <jason@redhat.com>

        PR c++/55878
        * rtti.c (build_typeid, get_typeid): Add complain parm.
        (get_tinfo_decl_dynamic): Likewise.
        * cp-tree.h, parser.c, pt.c: Adjust.

        PR c++/55893
        * decl.c (cp_finish_decl): Clear TREE_READONLY if the variable
        needs destruction.

2013-01-09  Jakub Jelinek  <jakub@redhat.com>

        PR c/48418
        * typeck.c (cp_build_binary_op): For LSHIFT_EXPR and RSHIFT_EXPR,
        call maybe_constant_value for the negative or too big shift
        count warnings.

2013-01-09  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/55801
        * decl2.c (var_needs_tls_wrapper): Return false when error_operand_p
        of the argument is true.

2013-01-08  Joel Brobecker  <brobecker@adacore.com>

        * parser.c (cp_parser_initializer_list): Move declaration
        of variable non_const to start of lexical block.

2013-01-07  Jason Merrill  <jason@redhat.com>

        PR c++/55753
        * tree.c (build_aggr_init_expr): Do nothing in a template.
        * pt.c (tsubst_copy_and_build) [CALL_EXPR]: Strip an ADDR_EXPR off
        a FUNCTION_DECL before tsubsting.

2013-01-04  Dodji Seketeli  <dodji@redhat.com>

        PR c++/52343
        * pt.c (check_instantiated_arg): Allow type template arguments.

2013-01-04  Jason Merrill  <jason@redhat.com>

        PR c++/55877
        * decl.c (reset_type_linkage, bt_reset_linkage): New.
        (grokdeclarator): Use reset_type_linkage.
        * name-lookup.c (binding_table_foreach): Handle null table.
        * tree.c (decl_anon_ns_mem_p): Check TYPE_MAIN_DECL, not TYPE_NAME.

2013-01-04  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/54526 (again)
        * parser.c (cp_parser_template_id): Revert core of previous change
        (keep adjusted inform message).

2013-01-03  Jason Merrill  <jason@redhat.com>

        PR c++/55419
        PR c++/55753
        * pt.c (tsubst_copy_and_build) [TARGET_EXPR]: Don't touch
        TREE_CONSTANT.

        PR c++/55842
        * semantics.c (trait_expr_value): Call maybe_instantiate_noexcept.

        PR c++/55856
        * semantics.c (build_data_member_initialization): Handle DECL_EXPR.

        PR c++/53650
        * call.c (type_has_extended_temps): New.
        * cp-tree.h: Declare it.
        * decl.c (check_initializer): Use build_aggr_init for arrays
        if it is false.
        * init.c (build_vec_init): Avoid mixed signed/unsigned arithmetic.

2013-01-02  Jason Merrill  <jason@redhat.com>

        PR c++/54325
        * call.c (build_new_method_call_1): Don't use build_value_init for
        user-provided default constructors.

        * decl.c (check_default_argument): Use LOOKUP_IMPLICIT.

        PR c++/55032
        PR c++/55245
        * tree.c (build_cplus_array_type): Copy layout information
        to main variant if necessary.
\f
Copyright (C) 2013 Free Software Foundation, Inc.

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.