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FieldFn

lambda_extension::tracing::subscriber::fmt::format

Struct FieldFn 

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pub struct FieldFn<F>(/* private fields */);
Available on crate features fmt and std and tracing only.
Expand description

A FormatFields implementation that formats fields by calling a function or closure.

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impl<F> Clone for FieldFn<F>
where F: Clone,

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fn clone(&self) -> FieldFn<F>

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl<F> Debug for FieldFn<F>
where F: Debug,

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

Formats the value using the given formatter. Read more
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impl<'a, F> MakeVisitor<Writer<'a>> for FieldFn<F>
where F: Fn(&mut Writer<'a>, &Field, &dyn Debug) -> Result<(), Error> + Clone,

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type Visitor = FieldFnVisitor<'a, F>

The visitor type produced by this MakeVisitor.
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fn make_visitor( &self, writer: Writer<'a>, ) -> <FieldFn<F> as MakeVisitor<Writer<'a>>>::Visitor

Make a new visitor for the provided target.

Auto Trait Implementations§

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impl<F> Freeze for FieldFn<F>
where F: Freeze,

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impl<F> RefUnwindSafe for FieldFn<F>
where F: RefUnwindSafe,

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impl<F> Send for FieldFn<F>
where F: Send,

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impl<F> Sync for FieldFn<F>
where F: Sync,

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impl<F> Unpin for FieldFn<F>
where F: Unpin,

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impl<F> UnsafeUnpin for FieldFn<F>
where F: UnsafeUnpin,

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impl<F> UnwindSafe for FieldFn<F>
where F: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where 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 T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<'writer, M> FormatFields<'writer> for M
where M: MakeOutput<Writer<'writer>, Result<(), Error>>, <M as MakeVisitor<Writer<'writer>>>::Visitor: VisitFmt + VisitOutput<Result<(), Error>>,

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fn format_fields<R>( &self, writer: Writer<'writer>, fields: R, ) -> Result<(), Error>
where R: RecordFields,

Format the provided fields to the provided Writer, returning a result.
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fn add_fields( &self, current: &'writer mut FormattedFields<Self>, fields: &Record<'_>, ) -> Result<(), Error>

Record additional field(s) on an existing span. Read more
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impl<T> From<T> for T

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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<U> for T
where U: From<T>,

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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<T, M> MakeExt<T> for M
where M: MakeVisitor<T> + Sealed<MakeExtMarker<T>>,

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fn debug_alt(self) -> Alt<Self>

Wraps self so that any fmt::Debug fields are recorded using the alternate formatter ({:#?}).
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fn display_messages(self) -> Messages<Self>

Wraps self so that any string fields named “message” are recorded using fmt::Display.
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fn delimited<D>(self, delimiter: D) -> Delimited<D, Self>
where D: AsRef<str> + Clone, Self::Visitor: VisitFmt,

Wraps self so that when fields are formatted to a writer, they are separated by the provided delimiter.
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impl<T, Out, M> MakeOutput<T, Out> for M
where M: MakeVisitor<T>, <M as MakeVisitor<T>>::Visitor: VisitOutput<Out>,

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fn visit_with<F>(&self, target: T, fields: &F) -> Out
where F: RecordFields,

Visits all fields in fields with a new visitor constructed from target.
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impl<T> ToOwned for T
where T: Clone,

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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<U> for T
where U: Into<T>,

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type Error = !

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, !>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::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