Trait TryFutureExt 

pub trait TryFutureExt<T, E>: Sized {
    // Provided method
    fn map_err<F, M>(self, map: M) -> MapErr<Self, M> 
       where M: FnOnce(E) -> F { ... }
}

Extension methods for futures that return a result.

Provided Methods

fn map_err<F, M>(self, map: M) -> MapErr<Self, M>

where M: FnOnce(E) -> F,

Returns a new future that converts the error by applying a function.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<F, T, E> TryFutureExt<T, E> for F

where F: TryFuture<T, E>,