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Proposal #13: Structure Sharing in Arguments
Date: 23 Jul 86 13:03:26 PDT (Wed)
in any reasonable implementation the &REST argument will
have been freshly consed.
That's an extremely odd idea. The entire reason that we have &REST
arguments at all is to avoid the need for consing the list. Had we
intended for the list to be freshly consed, we would never have
implemented &REST at all; we'd have just let the caller cons up a list
and pass it as a regular argument.