If we add the I/O streams types as template arguments for CommandLineInterpreter, we would gain in portability because it allows to work with characters of type char or wchar_t. Thus we would pass the streams to CommandLineInterpreter as std::iostreams or std::wiostreams and it would handle internally the strings as std::string or std::wstring as the case.
If we add the I/O streams types as template arguments for CommandLineInterpreter, we would gain in portability because it allows to work with characters of type char or wchar_t. Thus we would pass the streams to CommandLineInterpreter as std::iostreams or std::wiostreams and it would handle internally the strings as std::string or std::wstring as the case.