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pub struct Interest(_);
Expand description

Indicates a Subscriber’s interest in a particular callsite.

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

Implementations

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

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

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

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

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

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

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

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

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

Trait Implementations

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Auto Trait Implementations

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

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The type returned in the event of a conversion error.

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