public static Interval <V> OpenBetween <V>(Maybe <V> start, Maybe <V> end) where V : IComparable <V>
{
var startIntervalPoint = IntervalPoint <V> .PositiveInfinity <V>();
var endIntervalPoint = IntervalPoint <V> .NegativeInfinity <V>();
if (start.HasValue)
{
ValidatePointValueNotNull <V>(start.Value);
startIntervalPoint = IntervalPoint <V> .Open(start.Value);
}
if (end.HasValue)
{
ValidatePointValueNotNull <V>(end.Value);
endIntervalPoint = IntervalPoint <V> .Open(end.Value);
}
if (start.HasValue && end.HasValue)
{
ValidateStartBeforeEnd(start.Value, end.Value);
}
return(new Interval <V>(startIntervalPoint, endIntervalPoint));
}
public static Interval <V> InfinityStartInfinityEnd <V>() where V : IComparable <V>
{
return(new Interval <V>(IntervalPoint <V> .NegativeInfinity <V>(), IntervalPoint <V> .PositiveInfinity <V>()));
}
public static Interval <V> InfinityStartClosedEnd <V>(V end) where V : IComparable <V>
{
ValidatePointValueNotNull <V>(end);
return(new Interval <V>(IntervalPoint <V> .NegativeInfinity <V>(), IntervalPoint <V> .Closed(end)));
}