Re: Function at line ### has more than 60 upvalues
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- Subject: Re: Function at line ### has more than 60 upvalues
- From: Matthew Paul Del Buono <delbu9c1@...>
- Date: 2008年8月21日 17:58:13 -0400 (EDT)
>When defining an object, I follow this idiom:
>
>local factory
>do
> local method1 = function(self)
> print("method1", tostring(self))
> end
>
> local method2 = function(self)
> print("method2", tostring(self))
> end
>
> local methodN = function(self)
> print("methodN", tostring(self))
> end
>
> factory = function()
> return
> {
> method1 = method1;
> method2 = method2;
> --...
> methodN = methodN;
> }
> end
>end
>
Is there any particular reason you're doing it in this form? At least with your simplistic example, I don't see any real benefit to this over
local factory;
do
local mt = {};
function mt:method1()
print("method1", tostring(self));
end
function mt:method2()
print("method2", tostring(self));
end
-- etc etc, to methodN
factory = function()
return setmetatable({}, {__index = mt});
end
end
Which is by far one of the most common uses of metatables.
-- Matthew P. Del Buono