Struct slog::LevelFilter

pub struct LevelFilter<D: Drain>(pub D, pub Level);

Drain filtering records by Record logging level

Wraps a drain and passes records to it, only if their level is at least given level.

TODO: Remove this type. This drain is a special case of Filter, but because Filter can not use static dispatch ATM due to Rust limitations that will be lifted in the future, it is a standalone type. Reference: https://github.com/rust-lang/rust/issues/34511

Implementations

impl<D: Drain> LevelFilter<D>

pub fn new(drain: D, level: Level) -> Self

Create LevelFilter

Trait Implementations

impl<D: Clone + Drain> Clone for LevelFilter<D>

pub fn clone(&self) -> LevelFilter<D>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<D: Debug + Drain> Debug for LevelFilter<D>

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

Formats the value using the given formatter.

impl<D: Drain> Drain for LevelFilter<D>

type Ok = Option<D::Ok>

Type returned by this drain

type Err = D::Err

Type of potential errors that can be returned by this Drain

pub fn log(
    &self,
    record: &Record<'_>,
    logger_values: &OwnedKVList
) -> Result<Self::Ok, Self::Err>

Handle one logging statement (Record)

pub fn is_enabled(&self, level: Level) -> bool

Avoid: Check if messages at the specified log level are maybe enabled for this logger.

pub fn is_critical_enabled(&self) -> bool

Avoid: See is_enabled

pub fn is_error_enabled(&self) -> bool

Avoid: See is_enabled

pub fn is_warning_enabled(&self) -> bool

Avoid: See is_enabled

pub fn is_info_enabled(&self) -> bool

Avoid: See is_enabled

pub fn is_debug_enabled(&self) -> bool

Avoid: See is_enabled

pub fn is_trace_enabled(&self) -> bool

Avoid: See is_enabled

pub fn map<F, R>(self, f: F) -> R where
    Self: Sized,
    F: FnOnce(Self) -> R, 

Pass Drain through a closure, eg. to wrap into another Drain.

pub fn filter<F>(self, f: F) -> Filter<Self, F> where
    Self: Sized,
    F: FilterFn, 

Filter logging records passed to Drain

pub fn filter_level(self, level: Level) -> LevelFilter<Self> where
    Self: Sized, 

Filter logging records passed to Drain (by level)

pub fn map_err<F, E>(self, f: F) -> MapError<Self, E> where
    Self: Sized,
    F: MapErrFn<Self::Err, E>, 

Map logging errors returned by this drain

pub fn ignore_res(self) -> IgnoreResult<Self> where
    Self: Sized, 

Ignore results returned by this drain

pub fn fuse(self) -> Fuse<Self> where
    Self::Err: Debug,
    Self: Sized, 

Make Self panic when returning any errors