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In message <20120527172322.GA4629@magritte.tecgraf.puc-rio.br> 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 (gavin@wra1th.plus.com)
Home page: http://www.wra1th.plus.com/