In Lisp, every bind-exit or unwind-protect may be doing something like a setjmp. That's how it is implemented in the C runtime for Dylan as well. In JavaScript

In Lisp, every bind-exit or unwind-protect may be doing something like a setjmp. That's how it is implemented in the C runtime for Dylan as well. In JavaScript, you have the ability to break to a label to escape nested loops. That's a limited form of a non-local exit. Ola Bini was working with a condition system in his experimental / hobby language Ioke as well. These ideas get around. You'd probably be surprised at how some of this works in Smalltalk as well.