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- Subject: Re: parser hacking: conditional fields
- From: Coda Highland <chighland@...>
- Date: Thu, 28 Feb 2013 20:37:41 -0800
On Thu, Feb 28, 2013 at 8:20 PM, Javier Guerra Giraldez
<javier@guerrag.com> wrote:
> On Thu, Feb 28, 2013 at 6:47 PM, Sven Olsen <sven2718@gmail.com> wrote:
>> By chaining ~, I can write statements like the following, which are safe
>> even when 'object' or any of it's subtables have a chance of being nil:
>>
>> color = object~icon~glow~color or white
>
> you can change the metatable of nil to get that behavior.
>
>
> --
> Javier
>
You could also use a unique userdata and assign a metatable to that.
/s/ Adam
