pub enum EitherWriter<A, B> {
A(A),
B(B),
}
Available on crate features
fmt
and std
only.Expand description
A writer that is one of two types implementing io::Write
.
This may be used by MakeWriter
implementations that may conditionally
return one of two writers.
Variants§
Implementations§
Source§impl<T> EitherWriter<T, Sink>
impl<T> EitherWriter<T, Sink>
Sourcepub fn none() -> Self
pub fn none() -> Self
Returns a disabled writer.
Any bytes written to the returned writer are discarded.
This is equivalent to returning Option::None
.
Sourcepub fn some(t: T) -> Self
pub fn some(t: T) -> Self
Returns an enabled writer of type T
.
This is equivalent to returning Option::Some
.
Trait Implementations§
Source§impl<A: Clone, B: Clone> Clone for EitherWriter<A, B>
impl<A: Clone, B: Clone> Clone for EitherWriter<A, B>
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moreSource§impl<A, B> Write for EitherWriter<A, B>
impl<A, B> Write for EitherWriter<A, B>
Source§fn write(&mut self, buf: &[u8]) -> Result<usize>
fn write(&mut self, buf: &[u8]) -> Result<usize>
Writes a buffer into this writer, returning how many bytes were written. Read more
Source§fn flush(&mut self) -> Result<()>
fn flush(&mut self) -> Result<()>
Flushes 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_fmt(&mut self, fmt: Arguments<'_>) -> Result<()>
fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<()>
Writes a formatted string into this writer, returning any error
encountered. 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)impl<A: Copy, B: Copy> Copy for EitherWriter<A, B>
impl<A: Eq, B: Eq> Eq for EitherWriter<A, B>
impl<A, B> StructuralPartialEq for EitherWriter<A, B>
Auto Trait Implementations§
impl<A, B> Freeze for EitherWriter<A, B>
impl<A, B> RefUnwindSafe for EitherWriter<A, B>where
A: RefUnwindSafe,
B: RefUnwindSafe,
impl<A, B> Send for EitherWriter<A, B>
impl<A, B> Sync for EitherWriter<A, B>
impl<A, B> Unpin for EitherWriter<A, B>
impl<A, B> UnwindSafe for EitherWriter<A, B>where
A: UnwindSafe,
B: UnwindSafe,
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