Lua的Full UserData、Light UserData和metatable

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http://lua.2524044.n2.nabble.com/LightUserData-and-metatables-td3807698.html

 

"... do you realize that by setting the metatable of a light userdata
you are actually setting the metatable of all light userdata at once ?"
I did not realise this. oops. 

 

設定Full UserData的metatable設定的是一個Full UserData執行個體的metatable。

設定Light UserData的metatable設定的是所有Light UserData執行個體的metatable。

Lua的Full UserData、Light UserData和metatable