https://gcc.gnu.org/ml/gcc-patches/2017-10/msg02315.html
	* cp-tree.h (assign_op_identifier, call_op_identifier): Define.
	(LAMBDA_FUNCTION_P): Use DECL_OVERLOADED_OPERATOR_IS.
	(DECL_OVERLOADED_OPERATOR_P): Just retuurn true/false.
	(DECL_OVERLOADED_OPERATOR_CODE, DECL_OVERLOADED_OPERATOR_IS): Define.
	* call.c (add_function_candidate): Use
	DECL_OVERLOADED_OPERATOR_IS.
	(build_op_call_1): Use call_op_identifier &
	DECL_OVERLOADED_OPERATOR_IS.
	(build_over_call): Likewise.
	(has_trivial_copy_assign_p): Use assign_op_identifier.
	(build_special_member_call): Likewise.
	* class.c (dfs_declare_virt_assop_and_dtor): Likewise.
	(vbase_has_user_provided_move_assign,
	classtype_has_move_assign_or_move_ctor_p): Likewise.
	* decl.c (duplicate_decls): Use DECL_OVERLOADED_OPERATOR_CODE.
	(grok_special_member_properties): Use assign_op_identifier.
	(start_preparsed_function): Use DECL_OVERLOADED_OPERATOR_IS.
	* decl2.c (mark_used): Use DECL_CONV_FN_P.
	* dump.c (dump_access): Delete prototype.
	(dump_op): Delete.
	(cp_dump_tree): Don't call it.
	* lambda.c (lambda_function): Use call_op_identifier.
	(maybe_add_lambda_conv_op): Not an overloaded operator.  Remove
	unneeded braces.
	* mangle.c (write_unqualified_name): Use DECL_OVERLOADED_OPERTOR_CODE.
	* method.c (do_build_copy_assign): Use assign_op_identifier.
	(synthesize_method): Use DECL_OVERLOADED_OPERATOR_IS.
	(get_copy_assign): Use assign_op_identifier.
	(synthesized_method_walk): Likewise.
	(defaultable_fn_check): Use DECL_OVERLOADED_OPERATOR_IS.
	* parser.c (cp_parser_lambda_declarator_opt): Use
	call_op_identifier.
	* semanitics.c (classtype_has_nothrow_assign_or_copy_p): Use
	assign_op_identifier.
	* tree.c (special_function_p):  Use DECL_OVERLOADED_OPERATOR_IS.
	* typeck.c (check_return_expr): Use DECL_OVERLOADED_OPERATOR_CODE.
	(check_return_expr): Use assign_op_identifier.

From-SVN: r254263