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On 24.03.2017 15:34, Coda Highland wrote:
On Thu, Mar 23, 2017 at 9:54 PM, Tim Hill <> wrote:
On Mar 23, 2017, at 8:26 AM, 彭 书呆 <> wrote:

... so I have to use full userdata, then store the pointer itself into the full userdata.

Isn’t that really the point here? For some reason you don’t want to create a full userdata to wrap a void* to some externally managed C struct? Why not?

The "why not" was already explained: that means that you can have two
Lua objects pointing to the same C object, but the Lua objects compare
as unequal.

/s/ Adam

You can, but you don't have to. To avoid creating two Lua objects pointing to the same C objects is also possible with userdata, you just need some care.