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

Methods

impl<D: Drain> LevelFilter<D>

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

Create LevelFilter

Trait Implementations

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

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

Handle one logging statement (Record)

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.

fn filter<F>(self, f: F) -> Filter<Self, F> where Self: Sized, F: Fn(&Record) -> bool + 'static + Send + Sync

Filter logging records passed to Drain

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

Filter logging records passed to Drain (by level)

fn map_err<F, E>(self, f: F) -> MapError<Self, E> where Self: Sized, F: 'static + Sync + Send + Fn(Self::Err) -> E

Map logging errors returned by this drain

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

Ignore results returned by this drain