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> Roberto Ierusalimschy wrote:
> >The construction "in t do command end"  will execute <command> with
> >all global variables being resolved in <t>.
> Just to be sure I understood correctly:
> in the above example, if <command> modifies its global environment
> (e.g. by adding/changing variables), will the contents of <t> be
> accordingly changed after the execution of that line?

Yes. The semantics is exactly as Mark explained:

  in t do command end 

is translated to

    local _temp = t;

and all acesses to <global> inside command are changed to

-- Roberto