Struct BufWriter 

pub struct BufWriter<W: ?Sized + Write> { /* private fields */ }

Wraps a writer and buffers its output.

See std::io::BufWriter for more details.

Implementations

impl<W: Write> BufWriter<W>

pub fn new(inner: W) -> BufWriter<W>

Creates a new BufWriter<W> with a default buffer capacity.

pub fn into_inner(self) -> Result<W, IntoInnerError<BufWriter<W>>>

Unwraps this BufWriter<W>, returning the underlying writer.

The buffer is written out before returning the writer.

Errors

An Err will be returned if an error occurs while flushing the buffer.

pub fn into_parts( self, ) -> (W, Result<Vec<u8, DEFAULT_BUF_SIZE, u16>, WriterPanicked>)

Disassembles this BufWriter<W>, returning the underlying writer, and any buffered but unwritten data.

If the underlying writer panicked, it is not known what portion of the data was written. In this case, we return WriterPanicked for the buffered data (from which the buffer contents can still be recovered).

into_parts makes no attempt to flush data and cannot fail.

impl<W: ?Sized + Write> BufWriter<W>

pub fn get_ref(&self) -> &W

Gets a reference to the underlying writer.

pub fn get_mut(&mut self) -> &mut W

Gets a mutable reference to the underlying writer.

It is inadvisable to directly write to the underlying writer.

pub fn buffer(&self) -> &[u8]

Returns a reference to the internally buffered data.

pub fn capacity(&self) -> usize

Returns the number of bytes the internal buffer can hold without flushing.

Trait Implementations

impl<W: ?Sized + Write + Debug> Debug for BufWriter<W>

fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<W: ?Sized + Write> Drop for BufWriter<W>

fn drop(&mut self)

Executes the destructor for this type.

impl<W: ?Sized + Write + IoBufMut> IoBufMut for BufWriter<W>

fn remaining_mut(&self) -> usize

Returns the number of bytes that can be written from the current position until the end of the buffer is reached.

fn is_full(&self) -> bool

Returns true if there is no remaining space in the buffer.

impl<W: ?Sized + Write + Seek> Seek for BufWriter<W>

fn seek(&mut self, pos: SeekFrom) -> Result<u64>

Seek to the offset, in bytes, in the underlying writer.

Seeking always writes out the internal buffer before seeking.

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

Rewind to the beginning of a stream.

fn stream_position(&mut self) -> Result<u64>

Returns the current seek position from the start of the stream.

fn stream_len(&mut self) -> Result<u64>

Returns the length of this stream (in bytes).

fn seek_relative(&mut self, offset: i64) -> Result<()>

Seeks relative to the current position.

impl<W: ?Sized + Write> Write for BufWriter<W>

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

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

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

Attempts to write an entire buffer into this writer.

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

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

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

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.