pub struct OrElse<A, B> { /* private fields */ }Expand description
Combines a MakeWriter that returns an OptionalWriter with another
MakeWriter, so that the second MakeWriter is used when the first
MakeWriter returns OptionalWriter::none.
This is returned by the `MakeWriterExt::or_else method. See the method documentation for details.
Implementations
sourceimpl<A, B> OrElse<A, B>
impl<A, B> OrElse<A, B>
sourcepub fn new<'a, W>(inner: A, or_else: B) -> Self where
A: MakeWriter<'a, Writer = OptionalWriter<W>>,
B: MakeWriter<'a>,
W: Write,
pub fn new<'a, W>(inner: A, or_else: B) -> Self where
A: MakeWriter<'a, Writer = OptionalWriter<W>>,
B: MakeWriter<'a>,
W: Write,
Combines
Trait Implementations
sourceimpl<'a, A, B, W> MakeWriter<'a> for OrElse<A, B> where
A: MakeWriter<'a, Writer = OptionalWriter<W>>,
B: MakeWriter<'a>,
W: Write,
impl<'a, A, B, W> MakeWriter<'a> for OrElse<A, B> where
A: MakeWriter<'a, Writer = OptionalWriter<W>>,
B: MakeWriter<'a>,
W: Write,
type Writer = EitherWriter<W, B::Writer>
type Writer = EitherWriter<W, B::Writer>
The concrete io::Write implementation returned by make_writer. Read more
sourcefn make_writer(&'a self) -> Self::Writer
fn make_writer(&'a self) -> Self::Writer
impl<A: Copy, B: Copy> Copy for OrElse<A, B>
impl<A: Eq, B: Eq> Eq for OrElse<A, B>
impl<A, B> StructuralEq for OrElse<A, B>
impl<A, B> StructuralPartialEq for OrElse<A, B>
Auto Trait Implementations
impl<A, B> RefUnwindSafe for OrElse<A, B> where
A: RefUnwindSafe,
B: RefUnwindSafe,
impl<A, B> Send for OrElse<A, B> where
A: Send,
B: Send,
impl<A, B> Sync for OrElse<A, B> where
A: Sync,
B: Sync,
impl<A, B> Unpin for OrElse<A, B> where
A: Unpin,
B: Unpin,
impl<A, B> UnwindSafe for OrElse<A, B> where
A: UnwindSafe,
B: UnwindSafe,
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
sourceimpl<'a, M> MakeWriterExt<'a> for M where
M: MakeWriter<'a>,
impl<'a, M> MakeWriterExt<'a> for M where
M: MakeWriter<'a>,
sourcefn with_max_level(self, level: Level) -> WithMaxLevel<Self> where
Self: Sized,
fn with_max_level(self, level: Level) -> WithMaxLevel<Self> where
Self: Sized,
Wraps self and returns a MakeWriter that will only write output
for events at or below the provided verbosity Level. For instance,
Level::TRACE is considered to be _more verbosethanLevel::INFO`. Read more
sourcefn with_min_level(self, level: Level) -> WithMinLevel<Self> where
Self: Sized,
fn with_min_level(self, level: Level) -> WithMinLevel<Self> where
Self: Sized,
Wraps self and returns a MakeWriter that will only write output
for events at or above the provided verbosity Level. Read more
sourcefn with_filter<F>(self, filter: F) -> WithFilter<Self, F> where
Self: Sized,
F: Fn(&Metadata<'_>) -> bool,
fn with_filter<F>(self, filter: F) -> WithFilter<Self, F> where
Self: Sized,
F: Fn(&Metadata<'_>) -> bool,
Wraps self with a predicate that takes a span or event’s Metadata
and returns a bool. The returned MakeWriter’s
MakeWriter::make_writer_for method will check the predicate to
determine if a writer should be produced for a given span or event. Read more
sourcefn and<B>(self, other: B) -> Tee<Self, B>ⓘNotable traits for Tee<A, B>impl<A, B> Write for Tee<A, B> where
A: Write,
B: Write, where
Self: Sized,
B: MakeWriter<'a> + Sized,
fn and<B>(self, other: B) -> Tee<Self, B>ⓘNotable traits for Tee<A, B>impl<A, B> Write for Tee<A, B> where
A: Write,
B: Write, where
Self: Sized,
B: MakeWriter<'a> + Sized,
A: Write,
B: Write,
Combines self with another type implementing MakeWriter, returning
a new MakeWriter that produces writers that write to both
outputs. Read more
sourcefn or_else<W, B>(self, other: B) -> OrElse<Self, B> where
Self: MakeWriter<'a, Writer = OptionalWriter<W>> + Sized,
B: MakeWriter<'a> + Sized,
W: Write,
fn or_else<W, B>(self, other: B) -> OrElse<Self, B> where
Self: MakeWriter<'a, Writer = OptionalWriter<W>> + Sized,
B: MakeWriter<'a> + Sized,
W: Write,
Combines self with another type implementing MakeWriter, returning
a new MakeWriter that calls other’s make_writer if self’s
make_writer returns OptionalWriter::none. Read more
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcefn clone_into(&self, target: &mut T)
fn clone_into(&self, target: &mut T)
Uses borrowed data to replace owned data, usually by cloning. Read more