Rfind.
size_type CL_StringData16::rfind( const CL_StringData16 & s, size_type pos = npos ); size_type CL_StringData16::rfind( const wchar_t * s, size_type pos, size_type n); size_type CL_StringData16::rfind( const wchar_t * s, size_type pos = npos ); size_type CL_StringData16::rfind( wchar_t c, size_type pos = npos );