Function rfind

	size_type CL_BasicStringRef< CharType, CharTraits, std_string >::rfind(
		const CL_BasicStringRef & s,
		size_type  pos = npos );

	size_type CL_BasicStringRef< CharType, CharTraits, std_string >::rfind(
		const CharType * s,
		size_type  pos,
		size_type  n);

	size_type CL_BasicStringRef< CharType, CharTraits, std_string >::rfind(
		const CharType * s,
		size_type  pos = npos );

	size_type CL_BasicStringRef< CharType, CharTraits, std_string >::rfind(
		CharType c,
		size_type  pos = npos );