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#[repr(transparent)]
pub struct LevelFilter(_);
Expand description

A filter comparable to a verbosity Level.

If a Level is considered less than a LevelFilter, it should be considered enabled; if greater than or equal to the LevelFilter, that level is disabled. See LevelFilter::current for more details.

Note that this is essentially identical to the Level type, but with the addition of an OFF level that completely disables all trace instrumentation.

See the documentation for the Level type to see how Levels and LevelFilters interact.

Implementations

The “off” level.

Designates that trace instrumentation should be completely disabled.

The “error” level.

Designates very serious errors.

The “warn” level.

Designates hazardous situations.

The “info” level.

Designates useful information.

The “debug” level.

Designates lower priority information.

The “trace” level.

Designates very low priority, often extremely verbose, information.

Returns a LevelFilter that enables spans and events with verbosity up to and including level.

Returns the most verbose Level that this filter accepts, or None if it is OFF.

Returns a LevelFilter that matches the most verbose Level that any currently active Subscriber will enable.

User code should treat this as a hint. If a given span or event has a level higher than the returned LevelFilter, it will not be enabled. However, if the level is less than or equal to this value, the span or event is not guaranteed to be enabled; the subscriber will still filter each callsite individually.

Therefore, comparing a given span or event’s level to the returned LevelFilter can be used for determining if something is disabled, but should not be used for determining if something is enabled.

Trait Implementations

The log type that this type can be converted into.

Returns the log equivalent of self.

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Formats the value using the given formatter. Read more

Returns true if this layer is interested in a span or event with the given Metadata in the current Context, similarly to Subscriber::enabled. Read more

Returns an Interest indicating whether this layer will always, sometimes, or never be interested in the given Metadata. Read more

Returns an optional hint of the highest verbosity level that this Filter will enable. Read more

Notifies this filter that a new span was constructed with the given Attributes and Id. Read more

Notifies this filter that a span with the given Id recorded the given values. Read more

Notifies this filter that a span with the given ID was entered. Read more

Notifies this filter that a span with the given ID was exited. Read more

Notifies this filter that a span with the given ID has been closed. Read more

Converts to this type from the input type.

Converts to this type from the input type.

Converts to this type from the input type.

The associated error which can be returned from parsing.

Parses a string s to return a value of this type. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

Registers a new callsite with this layer, returning whether or not the layer is interested in being notified about the callsite, similarly to Subscriber::register_callsite. Read more

Returns true if this layer is interested in a span or event with the given metadata in the current Context, similarly to Subscriber::enabled. Read more

Performs late initialization when attaching a Layer to a Subscriber. Read more

Notifies this layer that a new span was constructed with the given Attributes and Id. Read more

Notifies this layer that a span with the given Id recorded the given values. Read more

Notifies this layer that a span with the ID span recorded that it follows from the span with the ID follows. Read more

Called before on_event, to determine if on_event should be called. Read more

Notifies this layer that an event has occurred.

Notifies this layer that a span with the given ID was entered.

Notifies this layer that the span with the given ID was exited.

Notifies this layer that the span with the given ID has been closed.

Notifies this layer that a span ID has been cloned, and that the subscriber returned a different ID. Read more

Composes this layer around the given Layer, returning a Layered struct implementing Layer. Read more

Composes this Layer with the given Subscriber, returning a Layered struct that implements Subscriber. Read more

Available on crate features registry and std only.

Combines self with a Filter, returning a Filtered layer. Read more

Available on crate features alloc or std only.

Erases the type of this Layer, returning a Boxed dyn Layer trait object. Read more

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

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

This method tests for !=.

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

This method tests for !=.

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

This method tests greater than or equal to (for self and other) and is used by the >= operator. 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

Returns the argument unchanged.

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.

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

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

Converts the given value to a String. 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.

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more