std::io::Chain - Rust
Description: API documentation for the Rust `Chain` struct in crate `std`.
Keywords: rust, rustlang, rust-lang, Chain

# 1.0.0[−][src]Struct std::io::Chain

    pub struct Chain<T, U> { /* fields omitted */ }

Adaptor to chain together two readers.

This struct is generally created by calling `chain` on a reader. Please see the documentation of `chain` for more details.

## Methods

###

`impl<T, U> Chain<T, U>`

[src]

####

`pub fn into_inner(self) -> (T, U)`

1.20.0
[src]

Consumes the `Chain`, returning the wrapped readers.

# Examples

    use std::io;
    use std::io::prelude::*;
    use std::fs::File;

    fn main() -> io::Result<()> {
        let mut foo_file = File::open("foo.txt")?;
        let mut bar_file = File::open("bar.txt")?;

        let chain = foo_file.chain(bar_file);
        let (foo_file, bar_file) = chain.into_inner();
        Ok(())
    }Run

####

`pub fn get_ref(&self) -> (&T, &U)`

1.20.0
[src]

Gets references to the underlying readers in this `Chain`.

# Examples

    use std::io;
    use std::io::prelude::*;
    use std::fs::File;

    fn main() -> io::Result<()> {
        let mut foo_file = File::open("foo.txt")?;
        let mut bar_file = File::open("bar.txt")?;

        let chain = foo_file.chain(bar_file);
        let (foo_file, bar_file) = chain.get_ref();
        Ok(())
    }Run

####

`pub fn get_mut(&mut self) -> (&mut T, &mut U)`

1.20.0
[src]

Gets mutable references to the underlying readers in this `Chain`.

Care should be taken to avoid modifying the internal I/O state of the underlying readers as doing so may corrupt the internal state of this `Chain`.

# Examples

    use std::io;
    use std::io::prelude::*;
    use std::fs::File;

    fn main() -> io::Result<()> {
        let mut foo_file = File::open("foo.txt")?;
        let mut bar_file = File::open("bar.txt")?;

        let mut chain = foo_file.chain(bar_file);
        let (foo_file, bar_file) = chain.get_mut();
        Ok(())
    }Run

## Trait Implementations

###

`impl<T: Debug, U: Debug> Debug for Chain<T, U>`

1.16.0
[src]

####

`fn fmt(&self, f: &mut Formatter) -> Result`

[src]

Formats the value using the given formatter. Read more

###

`impl<T: Read, U: Read> Read for Chain<T, U>`

[src]

####

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

[src]

Pull some bytes from this source into the specified buffer, returning how many bytes were read. Read more

####

`unsafe fn initializer(&self) -> Initializer`

[src]

🔬 This is a nightly-only experimental API. (`read_initializer` #42788)

Determines if this `Read`er can work with buffers of uninitialized memory. Read more

####

`fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize>`

[src]

Read all bytes until EOF in this source, placing them into `buf`. Read more

####

`fn read_to_string(&mut self, buf: &mut String) -> Result<usize>`

[src]

Read all bytes until EOF in this source, appending them to `buf`. Read more

####

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

1.6.0
[src]

Read the exact number of bytes required to fill `buf`. Read more

####
ⓘImportant traits for &'a mut I

### Important traits for &'a mut I

`impl<'a, I> Iterator for &'a mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'a, R: Read + ?Sized> Read for &'a mut Rimpl<'a, W: Write + ?Sized> Write for &'a mut W`

`fn by_ref(&mut self) -> &mut Self where Self: Sized,`

[src]

Creates a "by reference" adaptor for this instance of `Read`. Read more

####
ⓘImportant traits for Bytes<R>

### Important traits for Bytes<R>

`impl<R: Read> Iterator for Bytes<R> type Item = Result<u8>;`

`fn bytes(self) -> Bytes<Self> where Self: Sized,`

[src]

Transforms this `Read` instance to an [`Iterator`] over its bytes. Read more

####
ⓘImportant traits for Chain<T, U>

### Important traits for Chain<T, U>

`impl<T: Read, U: Read> Read for Chain<T, U>`

`fn chain<R: Read>(self, next: R) -> Chain<Self, R> where Self: Sized,`

[src]

Creates an adaptor which will chain this stream with another. Read more

####
ⓘImportant traits for Take<T>

### Important traits for Take<T>

`impl<T: Read> Read for Take<T>`

`fn take(self, limit: u64) -> Take<Self> where Self: Sized,`

[src]

Creates an adaptor which will read at most `limit` bytes from it. Read more

###

`impl<T: BufRead, U: BufRead> BufRead for Chain<T, U>`

1.9.0
[src]

####

`fn fill_buf(&mut self) -> Result<&[u8]>`

[src]

Returns the contents of the internal buffer, filling it with more data from the inner reader if it is empty. Read more

####

`fn consume(&mut self, amt: usize)`

[src]

Tells this buffer that `amt` bytes have been consumed from the buffer, so they should no longer be returned in calls to `read`. Read more

####

`fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> Result<usize>`

[src]

Read all bytes into `buf` until the delimiter `byte` or EOF is reached. Read more

####

`fn read_line(&mut self, buf: &mut String) -> Result<usize>`

[src]

Read all bytes until a newline (the 0xA byte) is reached, and append them to the provided buffer. Read more

####
ⓘImportant traits for Split<B>

### Important traits for Split<B>

`impl<B: BufRead> Iterator for Split<B> type Item = Result<Vec<u8>>;`

`fn split(self, byte: u8) -> Split<Self> where Self: Sized,`

[src]

Returns an iterator over the contents of this reader split on the byte `byte`. Read more

####
ⓘImportant traits for Lines<B>

### Important traits for Lines<B>

`impl<B: BufRead> Iterator for Lines<B> type Item = Result<String>;`

`fn lines(self) -> Lines<Self> where Self: Sized,`

[src]

Returns an iterator over the lines of this reader. Read more

## Auto Trait Implementations

###

`impl<T, U> Send for Chain<T, U> where T: Send, U: Send,`

###

`impl<T, U> Sync for Chain<T, U> where T: Sync, U: Sync,`

## Blanket Implementations

###

`impl<T, U> TryFrom for T where T: From<U>,`

[src]

#### `type Error = !`

🔬 This is a nightly-only experimental API. (`try_from` #33417)

The type returned in the event of a conversion error.

####

`fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`

[src]

🔬 This is a nightly-only experimental API. (`try_from` #33417)

Performs the conversion.

###

`impl<T> From for T`

[src]

####

`fn from(t: T) -> T`

[src]

Performs the conversion.

###

`impl<T, U> TryInto for T where U: TryFrom<T>,`

[src]

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

🔬 This is a nightly-only experimental API. (`try_from` #33417)

The type returned in the event of a conversion error.

####

`fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>`

[src]

🔬 This is a nightly-only experimental API. (`try_from` #33417)

Performs the conversion.

###

`impl<T, U> Into for T where U: From<T>,`

[src]

####

`fn into(self) -> U`

[src]

Performs the conversion.

###

`impl<T> Borrow for T where T: ?Sized,`

[src]

####
ⓘImportant traits for &'a mut I

### Important traits for &'a mut I

`impl<'a, I> Iterator for &'a mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'a, R: Read + ?Sized> Read for &'a mut Rimpl<'a, W: Write + ?Sized> Write for &'a mut W`

`fn borrow(&self) -> &T`

[src]

Immutably borrows from an owned value. Read more

###

`impl<T> BorrowMut for T where T: ?Sized,`

[src]

####
ⓘImportant traits for &'a mut I

### Important traits for &'a mut I

`impl<'a, I> Iterator for &'a mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'a, R: Read + ?Sized> Read for &'a mut Rimpl<'a, W: Write + ?Sized> Write for &'a mut W`

`fn borrow_mut(&mut self) -> &mut T`

[src]

Mutably borrows from an owned value. Read more

###

`impl<T> Any for T where T: 'static + ?Sized,`

[src]

####

`fn get_type_id(&self) -> TypeId`

[src]

🔬 This is a nightly-only experimental API. (`get_type_id` #27745)

this method will likely be replaced by an associated static

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

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