Struct tracing_core::field::Empty

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pub struct Empty;

Expand description

An empty field.

This can be used to indicate that the value of a field is not currently present but will be recorded later.

When a field’s value is Empty. it will not be recorded.

Trait Implementations

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impl Debug for Empty

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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 PartialEq<Empty> for Empty

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fn eq(&self, other: &Empty) -> bool

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

1.0.0 · source

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

This method tests for !=.

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impl Value for Empty

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fn record(&self, _: &Field, _: &mut dyn Visit)

Visits this value with the given Visitor.

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impl Eq for Empty

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impl StructuralEq for Empty

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impl StructuralPartialEq for Empty

Auto Trait Implementations

impl RefUnwindSafe for Empty

impl Send for Empty

impl Sync for Empty

impl Unpin for Empty

impl UnwindSafe for Empty

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,

const: unstable · source

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

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, U> Into for T where
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<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

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

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

Performs the conversion.

Struct tracing_core::field::Empty

Trait Implementations

impl Debug for Empty

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

impl PartialEq<Empty> for Empty

fn eq(&self, other: &Empty) -> bool

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

impl Value for Empty

fn record(&self, _: &Field, _: &mut dyn Visit)

impl Eq for Empty

impl StructuralEq for Empty

impl StructuralPartialEq for Empty

Auto Trait Implementations

impl RefUnwindSafe for Empty

impl Send for Empty

impl Sync for Empty

impl Unpin for Empty

impl UnwindSafe for Empty

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

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

type Error = Infallible

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

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

Struct tracing_core::field::Empty

Trait Implementations

impl Debug for Empty

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

impl PartialEq<Empty> for Empty

fn eq(&self, other: &Empty) -> bool

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

impl Value for Empty

fn record(&self, _: &Field, _: &mut dyn Visit)

impl Eq for Empty

impl StructuralEq for Empty

impl StructuralPartialEq for Empty

Auto Trait Implementations

impl RefUnwindSafe for Empty

impl Send for Empty

impl Sync for Empty

impl Unpin for Empty

impl UnwindSafe for Empty

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

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

type Error = Infallible

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

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

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

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