Encoding to std::io::Write?

[RandomInsano]

I'm providing data directly to a socket. It looks like encode() writes to std::fmt::Write so it must be written to buffer then sent to the socket.

That's serviceable, but seems like a bit of a waste of memory and performance. So, two questions:

1. Is there a way to write to std::io::Write that I haven't seen? Reviewing the text encoder, it seems like no
2. Is there any interest in a pull request that would implement this? Maybe as encode_stream() and hide that behind the existing encode() and friends?

[mxinden]

I am not aware of an official adapter between the two traits. That said, what is stopping you from writing your own?

use std::io;
use std::fmt;

pub struct IoFmtWriter<W: io::Write>(pub W);

impl<W: io::Write> fmt::Write for IoFmtWriter<W> {
    fn write_str(&mut self, s: &str) -> fmt::Result {
        self.0.write_all(s.as_bytes()).map_err(|_| fmt::Error)
    }
}

If that is indeed an option for you, I would assume others are facing the same issue. If so, would you want to create a pull request with an example to this repository?

[RandomInsano]

Yeah, that's an excellent idea! I actually moved to using Tokio so I'll include both a sync and asynchronous example. I'll add it to next-week's TODO list.