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/Rust

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]

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(())
}

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(())
}

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(())
}

Trait Implementations

impl<T: Debug, U: Debug> Debug for Chain<T, U> [src]
1.16.0

Formats the value using the given formatter. Read more

impl<T: Read, U: Read> Read for Chain<T, U> [src]

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

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

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

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

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

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

ⓘ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 R
impl<'a, W: Write + ?Sized> Write for &'a mut W

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

ⓘImportant traits for Bytes<R>
impl<R: Read> Iterator for Bytes<R>
    type Item = Result<u8>;

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

ⓘImportant traits for Chain<T, U>
impl<T: Read, U: Read> Read for Chain<T, U>

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

ⓘImportant traits for Take<T>
impl<T: Read> Read for Take<T>

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

impl<T: BufRead, U: BufRead> BufRead for Chain<T, U> [src]
1.9.0

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

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

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

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

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

ⓘImportant traits for Lines<B>
impl<B: BufRead> Iterator for Lines<B>
    type Item = Result<String>;

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]

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

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<T> From for T [src]

Performs the conversion.

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

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

The type returned in the event of a conversion error.

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

Performs the conversion.

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

Performs the conversion.

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

ⓘ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 R
impl<'a, W: Write + ?Sized> Write for &'a mut W

Immutably borrows from an owned value. Read more

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

ⓘ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 R
impl<'a, W: Write + ?Sized> Write for &'a mut W

Mutably borrows from an owned value. Read more

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

© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/io/struct.Chain.html