Re: Modifying a Closure in 5.0 Alpha

[Roberto Ierusalimschy <roberto@...>]

> I once wrote a function for 4.0 to do this, see lua_getcclosure() at 
> http://lua-users.org/wiki/LuaPowerPatches.  At the time Roberto said 
> they might add it to the next version of Lua, but this feature doesn't 
> get requested much and has fallen into the cracks.

We are still planning to put it, but it would work only to read upvalues
(not to set them); it would be more a debugging tool. If you need more
flexibility from upvalues, use a table instead (as ET already pointed
out). Then you have complete freedom to do whatever you want (add new
values, change them, share them across different closures, etc.)

-- Roberto