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In message <> you wrote:

> > for example
> >   _ENV[_ENV] = {_ENV = _ENV}
> What does that do?

Nothing AFAICT.
> > But are there any circumstances in which such licence is useful?
> My arithmetic expression library ae caches whole expressions as
> global variables to avoid recompiling them.

Thanks. I have just downloaded it, and will study it.
Gavin Wraith (
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