1.0.0[−][src]Struct std::io::Stdin
A handle to the standard input stream of a process.
Each handle is a shared reference to a global buffer of input data to this
process. A handle can be lock
'd to gain full access to BufRead
methods
(e.g., .lines()
). Reads to this handle are otherwise locked with respect
to other reads.
This handle implements the Read
trait, but beware that concurrent reads
of Stdin
must be executed with care.
Created by the io::stdin
method.
Note: Windows Portability Consideration
When operating in a console, the Windows implementation of this stream does not support non-UTF-8 byte sequences. Attempting to read bytes that are not valid UTF-8 will return an error.
Methods
impl Stdin
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ⓘImportant traits for StdinLock<'_>pub fn lock(&self) -> StdinLock
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Locks this handle to the standard input stream, returning a readable guard.
The lock is released when the returned lock goes out of scope. The
returned guard also implements the Read
and BufRead
traits for
accessing the underlying data.
Examples
use std::io::{self, Read}; fn main() -> io::Result<()> { let mut buffer = String::new(); let stdin = io::stdin(); let mut handle = stdin.lock(); handle.read_to_string(&mut buffer)?; Ok(()) }Run
pub fn read_line(&self, buf: &mut String) -> Result<usize>
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Locks this handle and reads a line of input into the specified buffer.
For detailed semantics of this method, see the documentation on
BufRead::read_line
.
Examples
use std::io; let mut input = String::new(); match io::stdin().read_line(&mut input) { Ok(n) => { println!("{} bytes read", n); println!("{}", input); } Err(error) => println!("error: {}", error), }Run
You can run the example one of two ways:
- Pipe some text to it, e.g.,
printf foo | path/to/executable
- Give it text interactively by running the executable directly, in which case it will wait for the Enter key to be pressed before continuing
Trait Implementations
impl Read for Stdin
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fn read(&mut self, buf: &mut [u8]) -> Result<usize>
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fn read_vectored(&mut self, bufs: &mut [IoSliceMut]) -> Result<usize>
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unsafe fn initializer(&self) -> Initializer
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fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize>
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fn read_to_string(&mut self, buf: &mut String) -> Result<usize>
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fn read_exact(&mut self, buf: &mut [u8]) -> Result<()>
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ⓘImportant traits for &'_ mut Ffn by_ref(&mut self) -> &mut Self where
Self: Sized,
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Self: Sized,
ⓘImportant traits for Bytes<R>fn bytes(self) -> Bytes<Self> where
Self: Sized,
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Self: Sized,
ⓘImportant traits for Chain<T, U>fn chain<R: Read>(self, next: R) -> Chain<Self, R> where
Self: Sized,
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Self: Sized,
ⓘImportant traits for Take<T>fn take(self, limit: u64) -> Take<Self> where
Self: Sized,
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Self: Sized,
impl AsRawFd for Stdin
1.21.0[src]
impl AsRawHandle for Stdin
1.21.0[src]
fn as_raw_handle(&self) -> RawHandle
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impl Debug for Stdin
1.16.0[src]
Auto Trait Implementations
impl UnwindSafe for Stdin
impl RefUnwindSafe for Stdin
impl Unpin for Stdin
impl Send for Stdin
impl Sync for Stdin
Blanket Implementations
impl<T> From<T> for T
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
ⓘImportant traits for &'_ mut Ffn borrow_mut(&mut self) -> &mut T
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,