The isnum operator works fine on negative number as the first bound, but not on the second, could it be supported?

//if (2 isnum -5-5) echo -aworks
//if (-3 isnum -1--5) echo -a doesn't work, and should

Seems to work fine here, as long as you put the smaller number first?

Same thing happens with range of positive numbers not working unless the smaller number is first

//if (5 isnum 3-7) echo -a this shows
//if (5 isnum 7-3) echo -a this does not

I see, It would be nice for isnum to support the other way around, my example should work as it works inside token functions to express relative to the end ranges, which I/scripts have been using for the past 20 years!