I have a simple question. Why is io::Write not implemented for UnixDatagram?
it seems to satisfy the contract of a writer.
I guess it's because io::Write is for streams, not messages. A wrapper like BufWriter doesn't change what data is written when it writes to streams, but it would mess up a message-oriented protocol.
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Yea ok, so io::Write doesn't make any guarantees about preserving a message's boundaries whereas UnixDatagram expects that the bytes given to UnixDatagram::send represent a discrete message.
Well in that case I'll remove the UnixDatagramWriter wrapper and rethink my design 