Struct std::io::StderrLock
1.0.0 · source · pub struct StderrLock<'a> { /* private fields */ }
Expand description
A locked reference to the Stderr
handle.
This handle implements the Write
trait and is constructed via
the Stderr::lock
method. See its documentation for more.
§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 write 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.
Trait Implementations§
1.63.0 · source§impl<'a> AsFd for StderrLock<'a>
impl<'a> AsFd for StderrLock<'a>
source§fn as_fd(&self) -> BorrowedFd<'_>
fn as_fd(&self) -> BorrowedFd<'_>
Borrows the file descriptor. Read more
1.63.0 · source§impl<'a> AsHandle for StderrLock<'a>
Available on Windows only.
impl<'a> AsHandle for StderrLock<'a>
Available on Windows only.
source§fn as_handle(&self) -> BorrowedHandle<'_>
fn as_handle(&self) -> BorrowedHandle<'_>
Borrows the handle. Read more
1.35.0 · source§impl<'a> AsRawFd for StderrLock<'a>
impl<'a> AsRawFd for StderrLock<'a>
1.35.0 · source§impl<'a> AsRawHandle for StderrLock<'a>
Available on Windows only.
impl<'a> AsRawHandle for StderrLock<'a>
Available on Windows only.
source§fn as_raw_handle(&self) -> RawHandle
fn as_raw_handle(&self) -> RawHandle
Extracts the raw handle. Read more
1.16.0 · source§impl Debug for StderrLock<'_>
impl Debug for StderrLock<'_>
1.70.0 · source§impl IsTerminal for StderrLock<'_>
impl IsTerminal for StderrLock<'_>
source§fn is_terminal(&self) -> bool
fn is_terminal(&self) -> bool
Returns
true
if the descriptor/handle refers to a terminal/tty. Read moresource§impl Write for StderrLock<'_>
impl Write for StderrLock<'_>
source§fn write(&mut self, buf: &[u8]) -> Result<usize>
fn write(&mut self, buf: &[u8]) -> Result<usize>
Write a buffer into this writer, returning how many bytes were written. Read more
source§fn is_write_vectored(&self) -> bool
fn is_write_vectored(&self) -> bool
🔬This is a nightly-only experimental API. (
can_vector
#69941)source§fn flush(&mut self) -> Result<()>
fn flush(&mut self) -> Result<()>
Flush this output stream, ensuring that all intermediately buffered
contents reach their destination. Read more
source§fn write_all(&mut self, buf: &[u8]) -> Result<()>
fn write_all(&mut self, buf: &[u8]) -> Result<()>
Attempts to write an entire buffer into this writer. Read more
source§fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<()>
fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<()>
🔬This is a nightly-only experimental API. (
write_all_vectored
#70436)Attempts to write multiple buffers into this writer. Read more
Auto Trait Implementations§
impl<'a> RefUnwindSafe for StderrLock<'a>
impl<'a> !Send for StderrLock<'a>
impl<'a> Sync for StderrLock<'a>
impl<'a> Unpin for StderrLock<'a>
impl<'a> UnwindSafe for StderrLock<'a>
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more