Re: Is this Lua table an array?

[David Jones <drj@...>]

On 5 Oct 2006, at 16:00, Doug Currie wrote:

> Thursday, October 5, 2006, 6:18:43 AM, David Jones wrote:
>
> > lua_tostring _has_ to modify the stack argument in order to keep the
> > GC happy.
>
> Well, it _could_ create a global weak reference to the string instead.

No, because without a strong reference to the string the GC would be  
at liberty to free the string and thereby invalidate the pointer that  
you just got back from lua_tostring in the C world.

To put it another way, how does the GC know when it can collect the  
string returned by lua_tostring?

drj