Re: A stupid question
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- Subject: Re: A stupid question
- From: ketmar <ketmar@...>
- Date: 2008年3月31日 18:52:44 +0300
On 2008年3月31日 18:47:02 +0200
Enrico Colombini <erix@erix.it> wrote:
> Do both functions share 'a' as an upvalue?
yes.
> If so, how can they hold a reference to a simple
> value (as opposed, for example, as to a table)?
compiler magic, upvalue is a special reference that is invisible to
user (but you can examine it with debug library).
> The second question, which prompted me to ask, is: if I remove both
> functions:
> t = {}
> does 'a' get collected at gc? (assuming there are no other reference
> to it)
yes.