Trait MapFn 

pub trait MapFn<T>: OptPartialEq + OptDebug {
    type Output;

    // Required method
    fn apply(self, input: T) -> Self::Output;
}

Local definition of the unstable FnOnce trait, allowing users of this crate to implement mapping functions that are PartialEq and Debug for observability purposes.

Required Associated Types

type Output

Required Methods

fn apply(self, input: T) -> Self::Output

Implementors

impl<T, F, O> MapFn<T> for F

where F: FnOnce(T) -> O,

Available on non-crate feature task-equality and non-crate feature task-debug only.

type Output = O