pub enum EitherWriter<A, B> {
A(A),
B(B),
}
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() -> EitherWriter<T, Sink> ⓘ
pub fn none() -> EitherWriter<T, Sink> ⓘ
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) -> EitherWriter<T, Sink> ⓘ
pub fn some(t: T) -> EitherWriter<T, Sink> ⓘ
Returns an enabled writer of type T
.
This is equivalent to returning Option::Some
.
Trait Implementations§
Source§impl<A, B> Clone for EitherWriter<A, B>
impl<A, B> 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> Debug for EitherWriter<A, B>
impl<A, B> Debug for EitherWriter<A, B>
Source§impl<A, B> PartialEq for EitherWriter<A, B>
impl<A, B> PartialEq for EitherWriter<A, B>
Source§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, Error>
fn write(&mut self, buf: &[u8]) -> Result<usize, Error>
Writes a buffer into this writer, returning how many bytes were written. Read more
Source§fn flush(&mut self) -> Result<(), Error>
fn flush(&mut self) -> Result<(), Error>
Flushes this output stream, ensuring that all intermediately buffered
contents reach their destination. Read more
Source§fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>
fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>
Attempts to write an entire buffer into this writer. Read more
Source§fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>
fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>
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
)impl<A, B> Copy for EitherWriter<A, B>
impl<A, B> 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
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
Source§fn into_any(self: Box<T>) -> Box<dyn Any>
fn into_any(self: Box<T>) -> Box<dyn Any>
Converts
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
, which can then be
downcast
into Box<dyn ConcreteType>
where ConcreteType
implements Trait
.Source§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Converts
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
, which can then be further
downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.Source§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Converts
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s.Source§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Converts
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s.Source§impl<T> DowncastSend for T
impl<T> DowncastSend for T
Source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
Source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to
key
and return true
if they are equal.Source§impl<T> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
Source§fn in_current_span(self) -> Instrumented<Self> ⓘ
fn in_current_span(self) -> Instrumented<Self> ⓘ
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
Converts
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read more