Struct FieldFn

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pub struct FieldFn<F>(/* private fields */);

Available on crate features fmt and std only.

Expand description

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

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

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

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<F: Debug> Debug for FieldFn<F>

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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, F> MakeVisitor<Writer<'a>> for FieldFn<F>
where F: Fn(&mut Writer<'a>, &Field, &dyn Debug) -> Result + 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>) -> Self::Visitor

Make a new visitor for the provided target.

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

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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, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit #126799)

Performs copy-assignment from self to dst. 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 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> 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 for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.

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

Performs the conversion.

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

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type Error = >::Error

The type returned in the event of a conversion error.

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

Performs the conversion.

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impl<T> WithCollector for T

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fn with_collector<C>(self, collector: C) -> WithDispatch<Self>
where C: Into<Dispatch>,

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

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fn with_current_collector(self) -> WithDispatch<Self>

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

Struct FieldFnCopy item path

Trait Implementations§

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

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

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

impl<F: Debug> Debug for FieldFn<F>

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

impl<'a, F> MakeVisitor<Writer<'a>> for FieldFn<F>where F: Fn(&mut Writer<'a>, &Field, &dyn Debug) -> Result + Clone,

type Visitor = FieldFnVisitor<'a, F>

fn make_visitor(&self, writer: Writer<'a>) -> Self::Visitor

Auto Trait Implementations§

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

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

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

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

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

impl<F> UnwindSafe for FieldFn<F>where F: 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> CloneToUninit for Twhere T: Clone,

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

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

fn debug_alt(self) -> Alt<Self>

fn display_messages(self) -> Messages<Self>

fn delimited<D>(self, delimiter: D) -> Delimited<D, Self>where D: AsRef<str> + Clone, Self::Visitor: VisitFmt,

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> WithCollector for T

fn with_collector<C>(self, collector: C) -> WithDispatch<Self>where C: Into<Dispatch>,

fn with_current_collector(self) -> WithDispatch<Self>

Struct FieldFn

impl<'a, F> MakeVisitor<Writer<'a>> for FieldFn<F>
where F: Fn(&mut Writer<'a>, &Field, &dyn Debug) -> Result + Clone,

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

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

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

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

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

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

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

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

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

impl<T> CloneToUninit for T
where T: Clone,

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

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

fn delimited<D>(self, delimiter: D) -> Delimited<D, Self>
where D: AsRef<str> + Clone, Self::Visitor: VisitFmt,

impl<T> ToOwned for T
where T: Clone,

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

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

fn with_collector<C>(self, collector: C) -> WithDispatch<Self>
where C: Into<Dispatch>,