Struct DualWriter 

pub struct DualWriter<W1: Write, W2: Write> { /* private fields */ }

A best-effort writer that supports multiple sub-writers.

When data is written, if one writer is unable to write the entire buffer, the buffer may still be consumed (resulting in data loss to one or more of the writers).

Implementations

impl<W1: Write, W2: Write> DualWriter<W1, W2>

pub fn new(writer1: W1, writer2: W2) -> Self

Initialise a new multi-writer with the provided sub-writers.

Trait Implementations

impl<W1: Write, W2: Write> Write for DualWriter<W1, W2>

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

Writes a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination.

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

Like write, except that it writes from a slice of buffers.

fn is_write_vectored(&self) -> bool

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

Determines if this Writer has an efficient write_vectored implementation.

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

Attempts to write an entire buffer into this writer.

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

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

Attempts to write multiple buffers into this writer.

fn write_fmt(&mut self, args: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

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

where Self: Sized,

Creates a “by reference” adapter for this instance of Write.