Struct BufferedWriter 

pub struct BufferedWriter<W> { /* private fields */ }

Wrapper around generic I/O streams implementing WriteExt

It internally maintains a buffer for fast operations which it then flushes to the underlying I/O stream when requested.

Implementations

impl<W> BufferedWriter<W>

pub fn new(inner: W) -> Self

Construct a new buffered writer

Trait Implementations

impl<W> Write for BufferedWriter<W>

where W: Write,

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.

impl<W> WriteExt for BufferedWriter<W>

where W: Write,

fn reserve_with(&mut self, additional: usize) -> Result<&mut [MaybeUninit<u8>]>

Reserve with additional capacity and returns the remaining spare capacity of the write as a slice of MaybeUninit<u8>.

unsafe fn flush_len(&mut self, additional: usize) -> Result<()>

Flush the additional length to the output stream, ensuring that additional bytes intermediately buffered contents reach their destination.