Find first of.
size_type CL_StringData16::find_first_of( const CL_StringData16 & s, size_type pos = 0); size_type CL_StringData16::find_first_of( const wchar_t * s, size_type pos, size_type n); size_type CL_StringData16::find_first_of( const wchar_t * s, size_type pos = 0); size_type CL_StringData16::find_first_of( wchar_t c, size_type pos = 0);