public static IRange GetRange(Value left, Value right, IMaybe <int> length, bool inside = false)
{
var range = left.As <IRange>();
if (range.IsSome)
{
range.Value.SetStop(right);
return(range.Value);
}
var dateRange = left.As <DateRange>();
if (dateRange.IsSome)
{
dateRange.Value.SetStop(right.Text);
return(dateRange.Value);
}
if (left.Type == ValueType.Number && right.Type == ValueType.Number)
{
var start = (int)left.Number;
var stop = (int)right.Number;
return(new IntRange(start, stop, length)
{
Inside = inside
});
}
if (left.Type == ValueType.String)
{
var start = left.Text;
var stop = right.Text;
Reject(start.IsEmpty(), LOCATION, "Start can't be an empty string");
Reject(stop.IsEmpty(), LOCATION, "Stop can't be an empty string");
return(new StringRange(start, stop));
}
if (left.Type == ValueType.Block && right.Type == ValueType.Block)
{
var start = (Block)left;
var stop = (Block)right;
return(new BlockRange(start, stop));
}
if (left.Type == ValueType.Date && right.Type == ValueType.Date)
{
var start = (Date)left;
var stop = (Date)right;
return(new DateRange(start, stop));
}
if (left.Type == ValueType.Rational)
{
var start = (Rational)left;
var stop = Rational.Cast(right);
return(new RationalRange(start, stop));
}
if (left.Type == ValueType.Object && right.Type == ValueType.Object)
{
var start = (Object)left;
var stop = (Object)right;
return(new ObjectRange(start, stop));
}
return(null);
}
