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On 22/10/2011, at 3:05 PM, Antonio Scuri wrote:

>> How did you manage to return something other than a boolean from a
>> relational operator?
> 
> Isn't just pushing it to the stack? I didn't tested yet.


The return values get converted to boolean:

http://lua-users.org/lists/lua-l/2010-02/msg00616.html

I thought this was documented somewhere, but I can't find it from a quick look at the 5.1 or 5.2 LRM