Which calculators run RPL under the hood?

[David Hayden]

It seems to me that adding a new object to RPL goes beyond creating a prolog. You also need hooks for:

• Computing the object size
• compiling an object from text
• decompiling an object to text
  

You also need a way to compare objects, and you may want to apply arithmetic operations (and other mathematical operations) to it, or convert it to an existing type so it can apply arithmetic.

Dave