Hi,
On Oct 7, 7:53 am, John Harrop <jharrop...@gmail.com> wrote:
> On Tue, Oct 6, 2009 at 9:14 PM, Stephen C. Gilardi <squee...@mac.com> wrote:
>
> > `(do (set-validator! (defvar ~name ~init) #{~init}) (var ~name)))
>
> Cute hack. Won't work if init is false or nil, though, unless the validator
> does not trigger on the initial assignment of the value.
One could make it really constant via:
(set-validator! (defvar ~name ~init) (constantly false))
Or is setting the validator calling it on the already set value?
Sincerely
Meikel
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