[−][src]Function smol::io::copy
pub async fn copy<R, W>(reader: R, writer: W) -> Result<u64, Error> where
R: AsyncRead + Unpin,
W: AsyncWrite + Unpin,
Copies the entire contents of a reader into a writer.
This function will read data from reader
and write it into writer
in a streaming fashion
until reader
returns EOF.
On success, returns the total number of bytes copied.
Examples
use futures_lite::*; let input: &[u8] = b"hello"; let reader = io::BufReader::new(input); let mut output = Vec::new(); let writer = io::BufWriter::new(&mut output); io::copy(reader, writer).await?;