Struct std::io::Stdin
[−]
[src]
pub struct Stdin {
// some fields omitted
}1.0.0A 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.
Methods
impl Stdin
fn lock(&self) -> StdinLock
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.
fn read_line(&self, buf: &mut String) -> Result<usize>
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
fn main() { 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), } }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), }
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