// NewEncoder returns a new encoder that will transmit on the io.Writer.
public static ptr <Encoder> NewEncoder(io.Writer w)
{
ptr <Encoder> enc = @new <Encoder>();
enc.w = new slice <io.Writer>(new io.Writer[] { w });
enc.sent = make_map <reflect.Type, typeId>();
enc.countState = enc.newEncoderState(@new <encBuffer>());
return(_addr_enc !);
}