Struct tracing_core::subscriber::NoSubscriber[][src]

pub struct NoSubscriber(_);
Expand description

A no-op Subscriber.

NoSubscriber implements the Subscriber trait by never being enabled, never being interested in any callsite, and dropping all spans and events.

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Returns the “default value” for a type. Read more

Registers a new callsite with this subscriber, returning whether or not the subscriber is interested in being notified about the callsite. Read more

Visit the construction of a new span, returning a new span ID for the span being constructed. Read more

Records that an Event has occurred. Read more

Record a set of values on a span. Read more

Adds an indication that span follows from the span with the id follows. Read more

Returns true if a span or event with the specified metadata would be recorded. Read more

Records that a span has been entered. Read more

Records that a span has been exited. Read more

Returns the highest verbosity level that this Subscriber will enable, or None, if the subscriber does not implement level-based filtering or chooses not to implement this method. Read more

Notifies the subscriber that a span ID has been cloned. Read more

👎 Deprecated since 0.1.2:

use Subscriber::try_close instead

This method is deprecated. Read more

Notifies the subscriber that a span ID has been dropped, and returns true if there are now 0 IDs that refer to that span. Read more

Returns a type representing this subscriber’s view of the current span. Read more

If self is the same type as the provided TypeId, returns an untyped *const pointer to that type. Otherwise, returns None. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Performs the conversion.

Performs the conversion.

The resulting type after obtaining ownership.

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

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

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.