map<U> method

@override @useResult Err<U, E> map<U>(U map(T value))

Transforms the contained value, if any, by applying map to it.

Examples

// prints "Ok(4)"
print(const Ok<int, String>(2).map((value) => value * 2));

// prints "Err(error)"
print(const Err<int, String>('error').map((value) => value * 2));

Implementation

@override
@useResult
Err<U, E> map<U>(U Function(T value) map) => Err(error);