Can we have RPN back?

[Tim Wessman]

So before I'd ever start working on a "classic RPN", I'd need to get answers that completely satisfy the questions about how it would work. These questions seem to center around.

1. How would a command line be treated since you can have multiple things together at a time (vs a single numerical only item)? If you are replacing the item in level 1 as you write it....
2. How would it behave in places like an input form or dialog where you have no stack?
3. How would algebraic objects be used?
4. How specifically would it work for all possible object types (numbers, complex, vector, matrix, list, string, algebraics,etc)?


As far as I can tell, 4 level RPN with DUP on enter went away as soon as you started being able to get a large number of different inputs/objects in use and places where input might be needed.

I am not against it (definitely lower priority in my mind then getting RPN working to the point I'd like consistently everywhere for example), but I don't know if there are any consistent clean answers that would allow it in a more capable/complex system. Please correct me if I'm wrong.