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Re: why undefined return values?
Ken Anderson <kanderso@bbn.com> writes:
> I have no problem with nesting let and and:
>
> (let ((eof (eof)))
> (and (not eof)
> (let ((match (find-match regexp)))
> (and match
> (let ((str (car match)))
> ...)))))
>
> However, it can certainly get tedious if needed a lot. Paul Graham's book On Lisp defines a macro, (aif) i think to support variations on this. In fact, the book has 13 chapters on macros.
(use-modules (ice-9 and-let*))
:)