[Dev-luatex] unique node id?

Hans Hagen pragma at wxs.nl
Sun Aug 29 13:15:37 CEST 2010


On 29-8-2010 9:03, Taco Hoekwater wrote:
> On 08/29/2010 08:48 AM, Patrick Gundlach wrote:
>>>
>>> Is the following 172 something like I need? How would I access that
>>> (besides string.gsub())?
>>>
>>> <node nil< 172> nil : hlist 2>
>>
>>
>> I am currently using this number in the middle via tostring() and
>> gsub(). But I'd still like to know if this can be used as an id.
>
> This number uniquely identifies a node for as long as it stays
> allocated, yes. If it is freed, a new node may have the same
> number.

but for storing the node's id one can as well use the nodes user object 
itself as it's equally unique during the livespan of a node and one can 
compare pointers so the 'id' snippet in the string is not giving more 
uniqueness than the node user object itself

Hans


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