Struct TeeReader

pub struct TeeReader<R: Read, W: Write> { /* private fields */ }

An adapter for readers whose inputs are written to a tee(1)’d writer

Implementations

impl<R: Read, W: Write> TeeReader<R, W>

pub fn new(reader: R, writer: W) -> TeeReader<R, W>

Returns a TeeReader which can be used as Read whose reads delegate ready bytes read to the provided reader and write to the provided writer. This write must complete before the read completes.

Errors reported by the read will be interpreted as Errors for the read

Examples found in repository

examples/simple.rs (line 11)

fn main() {
    let mut reader = "It's over 9000!".as_bytes();
    let mut teeout = Vec::new();
    let mut stdout = Vec::new();
    {
        let mut tee = TeeReader::new(&mut reader, &mut teeout);
        let _ = tee.read_to_end(&mut stdout);
    }
    println!("tee out -> {:?}", teeout);
    println!("std out -> {:?}", stdout);
}

Trait Implementations

impl<R: Read, W: Write> Read for TeeReader<R, W>

fn read(&mut self, buf: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers.

fn is_read_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Reader has an efficient read_vectored implementation.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Reads all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Reads all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Reads the exact number of bytes required to fill buf.

fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Pull some bytes from this source into the specified buffer.

fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Reads the exact number of bytes required to fill cursor.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

where Self: Sized,

Transforms this Read instance to an Iterator over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R>

where R: Read, Self: Sized,

Creates an adapter which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

where Self: Sized,

Creates an adapter which will read at most limit bytes from it.