pub struct StdinLock<'a> { /* private fields */ }
Expand description
A locked reference to the Stdin
handle.
This handle implements both the Read
and BufRead
traits, and
is constructed via the Stdin::lock
method.
Note: Windows Portability Considerations
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.
In a process with a detached console, such as one using
#![windows_subsystem = "windows"]
, or in a child process spawned from such a process,
the contained handle will be null. In such cases, the standard library’s Read
and
Write
will do nothing and silently succeed. All other I/O operations, via the
standard library or via raw Windows API calls, will fail.
Examples
use std::io::{self, BufRead};
fn main() -> io::Result<()> {
let mut buffer = String::new();
let stdin = io::stdin(); // We get `Stdin` here.
{
let mut handle = stdin.lock(); // We get `StdinLock` here.
handle.read_line(&mut buffer)?;
} // `StdinLock` is dropped here.
Ok(())
}
RunTrait Implementations
sourceimpl<'a> AsFd for StdinLock<'a>
impl<'a> AsFd for StdinLock<'a>
sourcefn as_fd(&self) -> BorrowedFd<'_>
fn as_fd(&self) -> BorrowedFd<'_>
Borrows the file descriptor. Read more
sourceimpl<'a> AsHandle for StdinLock<'a>
Available on Windows only.
impl<'a> AsHandle for StdinLock<'a>
1.35.0 · sourceimpl<'a> AsRawHandle for StdinLock<'a>
Available on Windows only.
impl<'a> AsRawHandle for StdinLock<'a>
sourcefn as_raw_handle(&self) -> RawHandle
fn as_raw_handle(&self) -> RawHandle
Extracts the raw handle. Read more
sourceimpl BufRead for StdinLock<'_>
impl BufRead for StdinLock<'_>
sourcefn fill_buf(&mut self) -> Result<&[u8]>
fn fill_buf(&mut self) -> Result<&[u8]>
Returns the contents of the internal buffer, filling it with more data from the inner reader if it is empty. Read more
sourcefn consume(&mut self, n: usize)
fn consume(&mut self, n: usize)
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
sourcefn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> Result<usize>
fn read_until(&mut self, byte: u8, buf: &mut Vec<u8>) -> Result<usize>
Read all bytes into buf
until the delimiter byte
or EOF is reached. Read more
sourcefn read_line(&mut self, buf: &mut String) -> Result<usize>
fn read_line(&mut self, buf: &mut String) -> Result<usize>
Read all bytes until a newline (the 0xA
byte) is reached, and append
them to the provided buffer. You do not need to clear the buffer before
appending. Read more
sourcefn has_data_left(&mut self) -> Result<bool>
fn has_data_left(&mut self) -> Result<bool>
Check if the underlying Read
has any data left to be read. Read more
sourceimpl Read for StdinLock<'_>
impl Read for StdinLock<'_>
sourcefn read(&mut self, buf: &mut [u8]) -> Result<usize>
fn read(&mut self, buf: &mut [u8]) -> Result<usize>
Pull some bytes from this source into the specified buffer, returning how many bytes were read. Read more
sourcefn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize>
fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize>
Like read
, except that it reads into a slice of buffers. Read more
sourcefn is_read_vectored(&self) -> bool
fn is_read_vectored(&self) -> bool
Determines if this Read
er has an efficient read_vectored
implementation. Read more
sourcefn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize>
fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize>
Read all bytes until EOF in this source, placing them into buf
. Read more
sourcefn read_to_string(&mut self, buf: &mut String) -> Result<usize>
fn read_to_string(&mut self, buf: &mut String) -> Result<usize>
Read all bytes until EOF in this source, appending them to buf
. Read more
sourcefn read_exact(&mut self, buf: &mut [u8]) -> Result<()>
fn read_exact(&mut self, buf: &mut [u8]) -> Result<()>
Read the exact number of bytes required to fill buf
. Read more
sourcefn read_buf(&mut self, buf: &mut ReadBuf<'_>) -> Result<()>
fn read_buf(&mut self, buf: &mut ReadBuf<'_>) -> Result<()>
Pull some bytes from this source into the specified buffer. Read more
sourcefn read_buf_exact(&mut self, buf: &mut ReadBuf<'_>) -> Result<()>
fn read_buf_exact(&mut self, buf: &mut ReadBuf<'_>) -> Result<()>
Read the exact number of bytes required to fill buf
. Read more
sourcefn by_ref(&mut self) -> &mut Self where
Self: Sized,
fn by_ref(&mut self) -> &mut Self where
Self: Sized,
Creates a “by reference” adaptor for this instance of Read
. Read more
sourcefn bytes(self) -> Bytes<Self>ⓘNotable traits for Bytes<R>impl<R: Read> Iterator for Bytes<R> type Item = Result<u8>;
where
Self: Sized,
fn bytes(self) -> Bytes<Self>ⓘNotable traits for Bytes<R>impl<R: Read> Iterator for Bytes<R> type Item = Result<u8>;
where
Self: Sized,
Auto Trait Implementations
impl<'a> RefUnwindSafe for StdinLock<'a>
impl<'a> !Send for StdinLock<'a>
impl<'a> Sync for StdinLock<'a>
impl<'a> Unpin for StdinLock<'a>
impl<'a> UnwindSafe for StdinLock<'a>
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more