This is solved by using an operative lisp - fexprs (or 'vau'/'$vau' in kernel and wat) are non-applicative combiners that execute at runtime, so you can have a

This is solved by using an operative lisp - fexprs (or 'vau'/'$vau' in kernel and wat) are non-applicative combiners that execute at runtime, so you can have a first class combiner that chooses when/how/how many times to evaluate its arguments. I've been having a lot of fun recently writing code in wat-pl (my perl port of Manuel Simonyi's wat-js interpreter)