Struct slog::MapError

pub struct MapError<D: Drain, E> { /* fields omitted */ }

Drain mapping error returned by another Drain

See Drain::map_err for convenience function.

Implementations

impl<D: Drain, E> MapError<D, E>

pub fn new<F>(drain: D, map_fn: F) -> Self where
    F: MapErrFn<<D as Drain>::Err, E>, 

Create Filter wrapping given drain

Trait Implementations

impl<D: Drain, E> Drain for MapError<D, E>

type Ok = D::Ok

Type returned by this drain

type Err = E

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

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

fn is_critical_enabled(&self) -> bool

Avoid: See is_enabled

fn is_error_enabled(&self) -> bool

Avoid: See is_enabled

fn is_warning_enabled(&self) -> bool

Avoid: See is_enabled

fn is_info_enabled(&self) -> bool

Avoid: See is_enabled

fn is_debug_enabled(&self) -> bool

Avoid: See is_enabled

fn is_trace_enabled(&self) -> bool

Avoid: See is_enabled

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: FilterFn, 

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: MapErrFn<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

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

Make Self panic when returning any errors