Struct NullWriter

pub struct NullWriter {}

A writer that discards all data.

Example

use std::io::Write;
 
let mut writer = backup_deduplicator::utils::NullWriter::new();
writer.write(b"Hello, world!").unwrap();

Implementations

impl NullWriter

pub fn new() -> Self

Create a new NullWriter.

Returns

A new NullWriter.

Trait Implementations

impl Write for NullWriter

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

Discard all data.

Arguments

• buf - The data to write.

Returns

The number of bytes written. Always the same as the length of buf.

Errors

Never

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

Flush the writer.

Errors

Never

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.