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Or my comment elsewhere in this thread about condition systems in Common Lisp and Dylan.

• astrobe_ 14y ago
  I said standard. Since that condition system is proper to Lisp, it is henceforth non-standard. And come on, you don't see setjump/longjump every 10 LOC, not even every 10 source file.
  • BruceM 14y ago
    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.