Read Write for core

[Ericson2314]

@Tobba and I have worked on https://github.com/QuiltOS/core_io, a copy of Read and Write but with an associated error type to make it just need core. Perhaps it would be nice to (optionally) extend these traits for no_std users?

[BurntSushi]

@Ericson2314 I'd be willing to do so once coreio gains more traction.

[BurntSushi]

I'm going to close this but feel free to re-open if you think we should reconsider core-io!

[Ericson2314]

Sure. Once I have a version on crates.io polished a bit I'll ping this.

[whitequark]

@BurntSushi Chiming in as I'm using core_io a bunch: I would very much like this to happen, but until jethrogb/rust-core_io#3 is resolved this would make the life of downstream crates harder.

[BurntSushi]

@whitequark That library is distinct from the one @Ericson2314 linked.

[whitequark]

@BurntSushi Oh. I'm much less happy with Ericson2314's library because it misses basic things (e.g. BufReader). I think the general direction of jethrogb's library (that is, mirroring std::io as closely as possible by being based on its codebase from the relevant libstd version directly) is correct, and from my audit I don't expect any other trouble after the two code-related issues I've opened are addressed.

[Ericson2314]

FWIW the only reason there is no BufReader is because I haven't implemented it yet.

[whitequark]

Yes, that you are reimplementing parts that are already well-tested by virtue of shipping in std::io also bothers me.