public override Range <T> GreaterThan(T value)
{
var newBound = BoundValue <T> .UpperBound(value);
if (upper < newBound)
{
return(EmptyRange.Instance);
}
return(new SingleRange(newBound.Max(lower), upper));
}
public override Range <T> LessThanOrEquals(T value)
{
var newBound = BoundValue <T> .UpperBound(value);
if (newBound < lower)
{
return(EmptyRange.Instance);
}
return(new SingleRange(lower, newBound.Min(upper)));
}
public override bool Includes(T value)
{
return(lower <= BoundValue <T> .UpperBound(value) && BoundValue <T> .LowerBound(value) <= upper);
}
public static SingleRange ThatLessThanOrEquals(T value)
{
return(new SingleRange(BoundValue <T> .NegativeInfinity, BoundValue <T> .UpperBound(value)));
}
public static SingleRange ThatGreaterThan(T value)
{
return(new SingleRange(BoundValue <T> .UpperBound(value), BoundValue <T> .PositiveInfinity));
}