I have the impression that this is mainly a point-and-click GUI for an implementation of a quarter of Common Lisp. To translate their calculator tutorial (http

I have the impression that this is mainly a point-and-click GUI for an implementation of a quarter of Common Lisp. To translate their calculator tutorial (http://www.jetbrains.com/mps/docs/tutorial.html http://www.jetbrains.com/mps/docs/tutorial.html), in Common Lisp you would write a little macro "define-calculator" that then lets you write something like this: (define-calculator java-and-php-hours (input java-hours :label "Java hours") (input php-hours :label "PHP hours") (output (+ (* java-hours 10) (* php-hours 5)) :label "Total")) It would be based on some library (e.g. common-qt) that provides GUI primitives.