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On 6 August 2015 at 22:16, Roberto Ierusalimschy <roberto@inf.puc-rio.br> wrote:
>> Is it possible to consider an implementation where L->top is strictly
>> the top of the stack, and not used for a dual purpose? Or am I missing
>> a point here?
>
> Can you suggest how to do such implementation?
>

Unfortunately do not yet fully understand this aspect so cannot
suggest a solution. Maybe as I understand more I will see a way (or
see why no other approach could work).

Regards