public static IOption <T1> Select <T0, T1>(
this IOption <T0> option,
Func <T0, T1> selector)
{
return(option.Case(
Option.None <T1>,
value =>
Option.Some(selector(value))));
}
public override int Peek()
{
if (enumerator == null)
{
throw new ObjectDisposedException("enumerator");
}
return(current.Case(
() => EOF,
value => (int)value));
}