andThenForResult

Returns Err(E) if the input is Err(E), otherwise calls transformer with the value and returns the result.

XXX: Some languages call this operation flatmap. But we don't provide flatMap() as alias of this function to sort with other APIs.

function andThenForResult<T, U, E>(input: Result<T, E>, transformer: ResultTryTransformFn<T, U, E>): Result<U, E>;

andThenForResult<T, U, E>(input: Result<T, E>, transformer: ResultTryTransformFn<T, U, E>): Result<U, E>

input: Result<T, E>

transformer: ResultTryTransformFn<T, U, E>