[Openmcl-devel] Trunk and released version
Tobias C. Rittweiler
tcr at freebits.de
Thu Aug 13 10:51:05 PDT 2009
Ron Garret <ron at flownet.com> writes:
> On Aug 13, 2009, at 9:12 AM, Tim Bradshaw wrote:
> > On 13 Aug 2009, at 15:55, Ron Garret wrote:
> > > I'd call that a bug in the ANSI spec. It violates the principle of
> > > least surprise for no benefit whatsoever. If X is unconditionally
> > > bound to NIL then there is no point in even having it in scope when
> > > the result-form is evaluated.
> > I'm guessing it's for compatibility with DOTIMES.
> But in the case of DOTIMES the iteration variable is rebound (or
> assigned) to a potentially useful value. In the case of DOLIST it's
> assigned (or rebound) to a constant (NIL) which cannot possibly serve
> any useful purpose.
It allows for an implementation based on DO*.
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