Asynchronous I/O
This crate contains the AsyncRead, AsyncWrite, AsyncSeek, and
AsyncBufRead traits, the asynchronous analogs to
std::io::{Read, Write, Seek, BufRead}. The primary difference is
that these traits integrate with the asynchronous task system.
All items of this library are only available when the std feature of this
library is activated, and it is activated by default.