- range lower upperprocedure
Creates a range that covers values from lower to upper. There are three variations of this:
- lower is #f and upper is not #f -> creates a range from (gen-current-fixnum-min) till upper
- lower is not #f and upper is #f -> creates a range from lower till (gen-current-fixnum-max)
- lower is not #f and upper is not #f -> creates a range from lower till upper