public HostLine(HostLineKind kind, HostEntry? entry_ = null, string comment_ = null, HostLineError? error_ = null, string line_ = null)
{
Kind = kind;
Entry_ = entry_;
Comment_ = comment_;
Error_ = error_;
Line = line_ ?? mkLine(Entry_, Comment_);
}
static HostLine Error(HostLineError error, string line)
{
return new HostLine(HostLineKind.ParseError, error_: error, line_: line);
}