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Date: Mon, 4 Jan 1988 20:27 EST
From: "Scott E. Fahlman" <Fahlman@C.CS.CMU.EDU>
Is there general agreement on whether it is valid Common Lisp to
destructively modify (RPLACA, RPLACD) the list to which a &REST
parameter is bound? I can't find a reference in CLtL for this.
I think there's general agreement that &rest args are supposed to be
righteous lists with indefinite extent, so RPLAC'ing them ought to be
I think it is legal for APPLY to pass user-specified list structure to
the function; if so the &REST list should be treated as read-only, as it
well might be. I can't remember this for sure.
- &REST lists
- From: "Scott E. Fahlman" <Fahlman@C.CS.CMU.EDU>