devela::_dep::tracing::metadata

Struct LevelFilter

pub struct LevelFilter(/* private fields */);

Available on crate features dep_tracing and alloc only.

Expand description

A filter comparable to a verbosity Level.

If a Level is considered less than or equal to a LevelFilter, it should be considered enabled; if greater than 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§

impl LevelFilter

pub const OFF: LevelFilter

The “off” level.

Designates that trace instrumentation should be completely disabled.

pub const ERROR: LevelFilter

The “error” level.

Designates very serious errors.

pub const WARN: LevelFilter

The “warn” level.

Designates hazardous situations.

pub const INFO: LevelFilter

The “info” level.

Designates useful information.

pub const DEBUG: LevelFilter

The “debug” level.

Designates lower priority information.

pub const TRACE: LevelFilter

The “trace” level.

Designates very low priority, often extremely verbose, information.

pub const fn from_level(level: Level) -> LevelFilter

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

pub const fn into_level(self) -> Option<Level> ⓘ

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

pub fn current() -> LevelFilter

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§

impl Clone for LevelFilter

fn clone(&self) -> LevelFilter

Returns a copy of the value. Read more

1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

impl Debug for LevelFilter

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

Formats the value using the given formatter. Read more

impl Display for LevelFilter

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

Formats the value using the given formatter. Read more

impl From<Level> for LevelFilter

fn from(level: Level) -> LevelFilter

Converts to this type from the input type.

impl From<LevelFilter> for Option<Level>

fn from(filter: LevelFilter) -> Option<Level> ⓘ

Converts to this type from the input type.

impl From<Option<Level>> for LevelFilter

fn from(level: Option<Level>) -> LevelFilter

Converts to this type from the input type.

impl FromStr for LevelFilter

type Err = ParseLevelFilterError

The associated error which can be returned from parsing.

fn from_str(from: &str) -> Result<LevelFilter, <LevelFilter as FromStr>::Err> ⓘ

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

impl Hash for LevelFilter

fn hash<H>(&self, state: &mut H)
where __H: Hasher,

Feeds this value into the given Hasher. Read more

1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

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

impl Ord for LevelFilter

fn cmp(&self, other: &LevelFilter) -> Ordering

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

1.21.0 · Source§

fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more

1.21.0 · Source§

fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more

1.50.0 · Source§

fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized,

Restrict a value to a certain interval. Read more

impl PartialEq<Level> for LevelFilter

fn eq(&self, other: &Level) -> bool

Tests for self and other values to be equal, and is used by ==.

1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq<LevelFilter> for Level

fn eq(&self, other: &LevelFilter) -> bool

Tests for self and other values to be equal, and is used by ==.

1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq for LevelFilter

fn eq(&self, other: &LevelFilter) -> bool

Tests for self and other values to be equal, and is used by ==.

1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd<Level> for LevelFilter

fn partial_cmp(&self, other: &Level) -> Option<Ordering> ⓘ

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

fn lt(&self, other: &Level) -> bool

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

fn le(&self, other: &Level) -> bool

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

fn gt(&self, other: &Level) -> bool

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

fn ge(&self, other: &Level) -> bool

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

impl PartialOrd<LevelFilter> for Level

fn partial_cmp(&self, other: &LevelFilter) -> Option<Ordering> ⓘ

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

fn lt(&self, other: &LevelFilter) -> bool

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

fn le(&self, other: &LevelFilter) -> bool

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

fn gt(&self, other: &LevelFilter) -> bool

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

fn ge(&self, other: &LevelFilter) -> bool

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

impl PartialOrd for LevelFilter

fn partial_cmp(&self, other: &LevelFilter) -> Option<Ordering> ⓘ

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

fn lt(&self, other: &LevelFilter) -> bool

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

fn le(&self, other: &LevelFilter) -> bool

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

fn gt(&self, other: &LevelFilter) -> bool

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

fn ge(&self, other: &LevelFilter) -> bool

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

impl Copy for LevelFilter

impl Eq for LevelFilter

impl StructuralPartialEq for LevelFilter

Auto Trait Implementations§

impl Freeze for LevelFilter

impl RefUnwindSafe for LevelFilter

impl Send for LevelFilter

impl Sync for LevelFilter

impl Unpin for LevelFilter

impl UnwindSafe for LevelFilter

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