Fun fact: LEaP’s original author, Christian Schafmeister, went on to create a Common Lisp implementation that uses C++ and LLVM for applications in molecular nanotechnology: <a href="https://www.youtube.com/watch?v=8X69_42Mj-g" rel="nofollow">https://www.youtube.com/watch?v=8X69_42Mj-g</a>