Struct tracing_subscriber::fmt::writer::OrElse

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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

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impl<A, B> OrElse<A, B>

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pub fn new<'a, W>(inner: A, or_else: B) -> Selfwhere
 A: MakeWriter<'a, Writer = OptionalWriter<W>>,
 B: MakeWriter<'a>,
 W: Write,

Combines

Trait Implementations

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impl<A: Clone, B: Clone> Clone for OrElse<A, B>

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fn clone(&self) -> OrElse<A, B>

Returns a copy of the value. Read more

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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl<A: Debug, B: Debug> Debug for OrElse<A, B>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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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, >::Writer>

The concrete io::Write implementation returned by make_writer. Read more

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fn make_writer(&'a self) -> Self::Writer

Returns an instance of Writer. Read more

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fn make_writer_for(&'a self, meta: &Metadata<'_>) -> Self::Writer

Returns a Writer for writing data from the span or event described by the provided Metadata. Read more

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impl<A: PartialEq, B: PartialEq> PartialEq<OrElse<A, B>> for OrElse<A, B>

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fn eq(&self, other: &OrElse<A, B>) -> bool

This method tests for self and other values to be equal, and is used by ==. Read more

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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more

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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

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impl<T> Any for Twhere
T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for Twhere
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for Twhere
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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impl<T, U> Into for Twhere
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<'a, M> MakeWriterExt<'a> for Mwhere
M: MakeWriter<'a>,

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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

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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

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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

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fn and(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,

Combines self with another type implementing MakeWriter, returning a new MakeWriter that produces writers that write to both outputs. Read more

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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

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impl<T> ToOwned for Twhere
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom for Twhere
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for Twhere
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where
S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more

Struct tracing_subscriber::fmt::writer::OrElse

Implementations

impl<A, B> OrElse<A, B>

pub fn new<'a, W>(inner: A, or_else: B) -> Selfwhere A: MakeWriter<'a, Writer = OptionalWriter<W>>, B: MakeWriter<'a>, W: Write,

Trait Implementations

impl<A: Clone, B: Clone> Clone for OrElse<A, B>

fn clone(&self) -> OrElse<A, B>

fn clone_from(&mut self, source: &Self)

impl<A: Debug, B: Debug> Debug for OrElse<A, B>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

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 as MakeWriter<'a>>::Writer>

fn make_writer(&'a self) -> Self::Writer

fn make_writer_for(&'a self, meta: &Metadata<'_>) -> Self::Writer

impl<A: PartialEq, B: PartialEq> PartialEq<OrElse<A, B>> for OrElse<A, B>

fn eq(&self, other: &OrElse<A, B>) -> bool

fn ne(&self, other: &Rhs) -> bool

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

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for T

fn from(t: T) -> T

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

fn in_current_span(self) -> Instrumented<Self>

impl<T, U> Into<U> for Twhere U: From<T>,

fn into(self) -> U

impl<'a, M> MakeWriterExt<'a> for Mwhere M: MakeWriter<'a>,

fn with_max_level(self, level: Level) -> WithMaxLevel<Self>where Self: Sized,

fn with_min_level(self, level: Level) -> WithMinLevel<Self>where Self: Sized,

fn with_filter<F>(self, filter: F) -> WithFilter<Self, F>where Self: Sized, F: Fn(&Metadata<'_>) -> bool,

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,

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,

impl<T> ToOwned for Twhere T: Clone,

type Owned = T

fn to_owned(&self) -> T

fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

fn with_current_subscriber(self) -> WithDispatch<Self>

pub fn new<'a, W>(inner: A, or_else: B) -> Selfwhere
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,

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,

impl<T> Any for Twhere
T: 'static + ?Sized,

impl<T> Borrow<T> for Twhere
T: ?Sized,

impl<T> BorrowMut<T> for Twhere
T: ?Sized,

impl<T, U> Into<U> for Twhere
U: From<T>,

impl<'a, M> MakeWriterExt<'a> for Mwhere
M: MakeWriter<'a>,

fn with_max_level(self, level: Level) -> WithMaxLevel<Self>where
Self: Sized,

fn with_min_level(self, level: Level) -> WithMinLevel<Self>where
Self: Sized,

fn with_filter<F>(self, filter: F) -> WithFilter<Self, F>where
Self: Sized,
F: Fn(&Metadata<'_>) -> bool,

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,

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,

impl<T> ToOwned for Twhere
T: Clone,

impl<T, U> TryFrom<U> for Twhere
U: Into<T>,

impl<T, U> TryInto<U> for Twhere
U: TryFrom<T>,

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where
S: Into<Dispatch>,