mapError<E2> method
Maps from a monad from one error type to another. This is useful for transforming from error mappings between APIs etc.
final Result<int, Exception> result1 = obj.doSomething();
final Result<int, String> result2 = result1.mapError((exception) => exception.message);
Implementation
Result<T, E2> mapError<E2>(E2 Function(E error) mapFunction) {
if (isSuccess) {
return Result.ok(_value);
}
final newError = mapFunction(_error);
return Result.error(newError);
}