Re: Determining if _ENV is the first upvalue of a closure?

[Tim Hill <drtimhill@...>]

> On Mar 12, 2015, at 10:22 PM, Daurnimator <quae@daurnimator.com> wrote:
> 
> On 13 March 2015 at 00:43, Paul K <paul@zerobrane.com> wrote:
>> 
>> You may try to avoid this problem by serializing a special value instead of _ENV. When you serialize the upvalues, you know if the first one points to the _ENV for the given function, so just store a special table value for it, so that when you deserialize it to setup proper value, you know that this function expects _ENV as the first upvalue, so you can do whatever is appropriate in this case.
> 
> Do you do this in serpent? ( https://github.com/pkulchenko/serpent )
> 

No, we use a custom serializer for performance reasons.

—Tim