My toy Lisp fn is an inherently single-threaded language, but with its built-in stack-inspection capabilities, it’s easy to build coroutines on top. The implementation only has about 20 lines of code, including comments. This article contains a simplified implementation in-line. In only rewrote some comments to make more sense in context, and removed confusing technicalities like fn’s custom method call syntax, the use of dynamic-wind and remarks about tail calls. Prerequisites In most pr...
