mapErr<F extends Object> method

Future<Result<T, F>> mapErr<F extends Object>(
  1. F op(
    1. E
    )
)

Maps a Result<T, E> to Result<T, F> by applying a function to a contained Err value, leaving an Ok value untouched.

This function can be used to pass through a successful result while handling an error.

Implementation

Future<Result<T, F>> mapErr<F extends Object>(F Function(E) op) =>
    then((result) => result.mapErr(op));