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On 5 October 2010 14:56, Thijs Koerselman <> wrote:
> On Tue, Oct 5, 2010 at 3:11 PM, steve donovan <>
> wrote:

> Aha so _ENV is implicitly used as the environment for any global variable,
> and if you re-declare _ENV yourself, like you do above, any global after
> that automagically ends up in that table. By declaring _ENV as local in a
> module, all exported names are kept in a local table and are not polluting
> global namespace. Any function or variable declared local in the module will
> not appear in the _ENV export table because only the globals end up there.


> If I understand this correctly, the above approach is backwards compatible
> with 5.1 if you add setenv(1, _ENV) after the first line, right?