Struct tracing_subscriber::filter::LevelFilter [−][src]
#[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 disabled; if greater than or equal to the LevelFilter
, that
level is enabled.
Note that this is essentially identical to the Level
type, but with the
addition of an OFF
level that completely disables all trace
instrumentation.
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 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
Performs the conversion.
Performs the conversion.
type Err = ParseLevelFilterError
type Err = ParseLevelFilterError
The associated error which can be returned from parsing.
Parses a string s
to return a value of this type. 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
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
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
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 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