Implementing co-routines (co-operative multitasking) requires

(Example of a C co-routine implementation achieved using makecontext, swapcontext, getcontext and setcontext.)

goto &foo does not help with any of that.

On the other hand, it can be used to eliminate tail calls, and tail call elimination is something LISP does.

The OP uses goto &sub for tail call elimination.

In reply to Re^5: Weird syntax. What does this goto statement do? ( 'goto &NAME' use cases) by ikegami
in thread Weird syntax. What does this goto statement do? by harangzsolt33

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