/** Echo command argument line to std::cerr.
This command is compatible with GNU Go's 'echo_err' command. */
void SgGtpCommands::CmdEchoErr(GtpCommand& cmd)
{
string line = cmd.ArgLine();
cerr << line << endl;
cmd << line;
}
/** Echo command argument line as response.
This command is compatible with GNU Go's 'echo' command. */
void SgGtpCommands::CmdEcho(GtpCommand& cmd)
{
cmd << cmd.ArgLine();
}