# Struct bytes::buf::Writer [−] [src]

    pub struct Writer<B> { /* fields omitted */ }

A `BufMut` adapter which implements `io::Write` for the inner value.

This struct is generally created by calling `writer()` on `BufMut`. See documentation of `writer()` for more details.

## Implementations

### `impl<B: BufMut> Writer<B>` [src]

#### `pub fn get_ref(&self) -> &B` [src]

Gets a reference to the underlying `BufMut`.

It is inadvisable to directly write to the underlying `BufMut`.

# Examples

    use bytes::BufMut;

    let buf = Vec::with_capacity(1024).writer();

    assert_eq!(1024, buf.get_ref().capacity());

#### `pub fn get_mut(&mut self) -> &mut B` [src]

Gets a mutable reference to the underlying `BufMut`.

It is inadvisable to directly write to the underlying `BufMut`.

# Examples

    use bytes::BufMut;

    let mut buf = vec![].writer();

    buf.get_mut().reserve(1024);

    assert_eq!(1024, buf.get_ref().capacity());

#### `pub fn into_inner(self) -> B` [src]

Consumes this `Writer`, returning the underlying value.

# Examples

    use bytes::BufMut;
    use std::io;

    let mut buf = vec![].writer();
    let mut src = &b"hello world"[..];

    io::copy(&mut src, &mut buf).unwrap();

    let buf = buf.into_inner();
    assert_eq!(*buf, b"hello world"[..]);

## Trait Implementations

### `impl<B: Debug> Debug for Writer<B>` [src]

#### `fn fmt(&self, f: &mut Formatter<'_>) -> Result` [src]

Formats the value using the given formatter. Read more

### `impl<B: BufMut + Sized> Write for Writer<B>` [src]

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

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

#### `fn flush(&mut self) -> Result<()>` [src]

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

#### `pub fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>`1.36.0 [src]

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

#### `pub fn is_write_vectored(&self) -> bool` [src]

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

Determines if this `Write`r has an efficient `write_vectored` implementation. Read more

#### `pub fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>`1.0.0 [src]

Attempts to write an entire buffer into this writer. Read more

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

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

Attempts to write multiple buffers into this writer. Read more

#### `pub fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>`1.0.0 [src]

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

#### `pub fn by_ref(&mut self) -> &mut Self` 1.0.0 [src]

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

## Auto Trait Implementations

### `impl<B> RefUnwindSafe for Writer<B> where
B: RefUnwindSafe,`

### `impl<B> Send for Writer<B> where
B: Send,`

### `impl<B> Sync for Writer<B> where
B: Sync,`

### `impl<B> Unpin for Writer<B> where
B: Unpin,`

### `impl<B> UnwindSafe for Writer<B> where
B: UnwindSafe,`

## Blanket Implementations

### `impl<T> Any for T where
T: 'static + ?Sized,` [src]

#### `pub fn type_id(&self) -> TypeId` [src]

Gets the `TypeId` of `self`. Read more

### `impl<T> Borrow<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow(&self) -> &T` [src]

Immutably borrows from an owned value. Read more

### `impl<T> BorrowMut<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow_mut(&mut self) -> &mut T` [src]

Mutably borrows from an owned value. Read more

### `impl<T> From<T> for T` [src]

#### `pub fn from(t: T) -> T` [src]

Performs the conversion.

### `impl<T, U> Into<U> for T where
U: From<T>,` [src]

#### `pub fn into(self) -> U` [src]

Performs the conversion.

### `impl<T, U> TryFrom<U> for T where
U: Into<T>,` [src]

#### `type Error = Infallible`

The type returned in the event of a conversion error.

#### `pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>` [src]

Performs the conversion.

### `impl<T, U> TryInto<U> for T where
U: TryFrom<T>,` [src]

#### `type Error = <U as TryFrom<T>>::Error`

The type returned in the event of a conversion error.

#### `pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>` [src]

Performs the conversion.