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Edgar Toernig wrote:

> I made a patch for lua 4.0a that allows upvalues to access locals in outer
> scopes.  Semantically it does just what you did by hand, that is inserting
> a "local foo=%foo" (but without actually creating the intermediate local).
> Everything else stays the same.  You can find the patch at
> I ask the designers to look at the patch and include it into the final 4.0
> version.  It's fully backwards compatible, makes the upvalue handling more
> orthogonal, fits pretty well into the parser, and removes this annoying
> restriction.

Speaking of orthogonal handling and upvalues, I would like to use the
upvalue syntax in the global scope.  Combined with your patch I could just
write %var everywhere without having to think about what scope I'm in.