Struct tracing_subscriber::fmt::format::FieldFn

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pub struct FieldFn<F>(_);

Expand description

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

Trait Implementations

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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

1.0.0 · source

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

type Visitor = FieldFnVisitor<'a, F>

The visitor type produced by this MakeVisitor.

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fn make_visitor(&self, writer: &'a mut dyn Write) -> Self::Visitor

Make a new visitor for the provided target.

Auto Trait Implementations

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

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

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pub 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,

const: unstable · source

pub 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,

const: unstable · source

pub 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

pub 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>,

const: unstable · source

pub 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 ({:#?}). Read more

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fn display_messages(self) -> Messages<Self>

Wraps self so that any string fields named “message” are recorded using fmt::Display. Read more

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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. Read more

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

type Owned = T

The resulting type after obtaining ownership.

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pub fn to_owned(&self) -> T

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

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

🔬 This is a nightly-only experimental API. (toowned_clone_into #41263)

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>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

pub 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>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

Struct tracing_subscriber::fmt::format::FieldFn

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

type Visitor = FieldFnVisitor<'a, F>

fn make_visitor(&self, writer: &'a mut dyn Write) -> Self::Visitor

Auto Trait Implementations

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 T where T: 'static + ?Sized,

pub fn type_id(&self) -> TypeId

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

pub fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

pub 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 T where U: From<T>,

pub fn into(self) -> U

impl<T, M> MakeExt<T> for M where 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 T where T: Clone,

type Owned = T

pub fn to_owned(&self) -> T

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

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

type Error = Infallible

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

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

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

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

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

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, 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>,