Struct tracing_subscriber::fmt::writer::OrElse
source · 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§
source§impl<A, B> OrElse<A, B>
impl<A, B> OrElse<A, B>
sourcepub fn new<W>(inner: A, or_else: B) -> Selfwhere
A: MakeWriter<Writer = OptionalWriter<W>>,
B: MakeWriter,
W: Write,
pub fn new<W>(inner: A, or_else: B) -> Selfwhere
A: MakeWriter<Writer = OptionalWriter<W>>,
B: MakeWriter,
W: Write,
Combines
Trait Implementations§
source§impl<A, B, W> MakeWriter for OrElse<A, B>where
A: MakeWriter<Writer = OptionalWriter<W>>,
B: MakeWriter,
W: Write,
impl<A, B, W> MakeWriter for OrElse<A, B>where
A: MakeWriter<Writer = OptionalWriter<W>>,
B: MakeWriter,
W: Write,
§type Writer = EitherWriter<W, <B as MakeWriter>::Writer>
type Writer = EitherWriter<W, <B as MakeWriter>::Writer>
source§impl<A: PartialEq, B: PartialEq> PartialEq<OrElse<A, B>> for OrElse<A, B>
impl<A: PartialEq, B: PartialEq> PartialEq<OrElse<A, B>> for OrElse<A, B>
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§
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<M> MakeWriterExt for Mwhere
M: MakeWriter,
impl<M> MakeWriterExt for Mwhere
M: MakeWriter,
source§fn 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 moresource§fn 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 moresource§fn 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 moresource§fn and<B>(self, other: B) -> Tee<Self, B> ⓘwhere
Self: Sized,
B: MakeWriter + Sized,
fn and<B>(self, other: B) -> Tee<Self, B> ⓘwhere
Self: Sized,
B: MakeWriter + Sized,
Combines
self with another type implementing MakeWriter, returning
a new MakeWriter that produces writers that write to both
outputs. Read moresource§fn or_else<W, B>(self, other: B) -> OrElse<Self, B>where
Self: MakeWriter<Writer = OptionalWriter<W>> + Sized,
B: MakeWriter + Sized,
W: Write,
fn or_else<W, B>(self, other: B) -> OrElse<Self, B>where
Self: MakeWriter<Writer = OptionalWriter<W>> + Sized,
B: MakeWriter + 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