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Do metatables work on methods (e.g. table:function)?
Do metatables work on tables? I was thinking something like:
01 | local tab = {} |
02 | local metaTab = { |
03 | __index = function(tab, i) |
04 | print(tab, i) |
05 | end) |
06 | } |
07 | function tab:test(what) |
08 | print(what) |
09 | end |
10 | setmetatable(tab, metaTab) |
11 | tab:test("wat") |
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Yes. In Lua 5.2+, that's the only thing metatables work with. In Lua 5.1 (what Roblox uses), metatables can be used with userdatas and tables.
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No I mean will __index fire if I do table:function() User#22219 20 — 6y
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Oh, sorry for the late reply. The answer is yes... but not in your example. __index is only invoked when you're indexing a nil value, and tab.test isn't a nil value when you index it. Keep in mind this works because tab:test() is the same as tab.test(tab). A way to get around this would be to have a proxy and add test to the proxy instead, but still set tab's metatable to metaTab. Then, in __in... NewVoids 97 — 6y
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dex index the proxy with the key that tab was indexed with, and return that value. This way, there will never be a value in tab so it'll always invoke __index. You can even set __newindex of tab to automatically insert the value into the proxy instead of tab. NewVoids 97 — 6y
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Is there a way to do it indexed? User#22219 20 — 6y