There's an easy alternative: just use the MAX and MIN values. That's what you would do with integers anyway, in case of initial values. As for limits, if you ne

There's an easy alternative: just use the MAX and MIN values. That's what you would do with integers anyway, in case of initial values. As for limits, if you need to express limits in a datatype for expressing a small subset of rational numbers, you've got the wrong tool for the job.