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For the release documentation, please see docs.rs, instead.

Struct tracing_core::collect::Interest

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pub struct Interest(/* private fields */);
Expand description

Indicates a Collect’s interest in a particular callsite.

Collectors return an Interest from their register_callsite methods in order to determine whether that span should be enabled or disabled.

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impl Interest

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pub fn never() -> Self

Returns an Interest indicating that the collector is never interested in being notified about a callsite.

If all active collectors are never() interested in a callsite, it will be completely disabled unless a new collector becomes active.

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pub fn sometimes() -> Self

Returns an Interest indicating the collector is sometimes interested in being notified about a callsite.

If all active collectors are sometimes or never interested in a callsite, the currently active collector will be asked to filter that callsite every time it creates a span. This will be the case until a new collector expresses that it is always interested in the callsite.

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pub fn always() -> Self

Returns an Interest indicating the collector is always interested in being notified about a callsite.

If any collector expresses that it is always() interested in a given callsite, then the callsite will always be enabled.

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pub fn is_never(&self) -> bool

Returns true if the collector is never interested in being notified about this callsite.

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pub fn is_sometimes(&self) -> bool

Returns true if the collector is sometimes interested in being notified about this callsite.

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pub fn is_always(&self) -> bool

Returns true if the collector is always interested in being notified about this callsite.

Trait Implementations§

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impl Clone for Interest

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fn clone(&self) -> Interest

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 Debug for Interest

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

Formats the value using the given formatter. Read more

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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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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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> 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 = 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<U>>::Error>

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.