Trait MapErrFn 

pub trait MapErrFn<EI, EO>:
    'static
    + Sync
    + Send
    + UnwindSafe
    + RefUnwindSafe
    + Fn(EI) -> EO { }

Function that can be used in MapErr drain

Implementors

impl<T, EI, EO> MapErrFn<EI, EO> for T

where T: 'static + Sync + Send + ?Sized + UnwindSafe + RefUnwindSafe + Fn(EI) -> EO,