Trait AsyncWrite 

pub trait AsyncWrite {
    // Required method
    fn poll_write(
        self: Pin<&mut Self>,
        cx: &mut Context<'_>,
        buf: &[u8],
    ) -> Poll<Result<usize>>;
}

Writes bytes into a destination.

Required Methods

fn poll_write( self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &[u8], ) -> Poll<Result<usize>>

Attempt to write buf into the destination.

Generally, an implementation will perform a copy.

On success, it returns Ok(num_bytes_written), that is the number of bytes written. Note that, it is possible that not the entire buf will be written (for instance, because of a mechanism of flow controller or limited capacity).

An implementation SHOULD never return Ok(0) if buf is not empty.

An implementation SHOULD only generates the following errors:

• std::io::ErrorKind::ConnectionReset if the write operation was explicitly stopped by the destination.
• std::io::ErrorKind::NotConnected if the write operation aborted at any point because lack of communication with the destination.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl AsyncWrite for Vec<u8>

fn poll_write( self: Pin<&mut Self>, _cx: &mut Context<'_>, buf: &[u8], ) -> Poll<Result<usize>>

Implementors