Created
March 19, 2011 18:38
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Quick and dirty mixins in Lua
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Mixin = {} | |
Mixin.__index = Mixin | |
Mixin.__mixins = {Mixin} | |
function Mixin:__index (method) | |
for i=#getmetatable(self).__mixins, 1, -1 do | |
local m = getmetatable(self).__mixins[i][method] | |
if m then return m end | |
end | |
end | |
function Mixin:new () | |
return setmetatable({}, Mixin) | |
end | |
function Mixin:addmeta (mt) | |
table.insert(self.__mixins, mt) | |
end | |
function Mixin:removemeta (mt) | |
for k, v in pairs(self.__mixins) do | |
if v == mt then self.__mixins[k] = nil end | |
end | |
end | |
-- Usage | |
obj = Mixin:new() | |
obj:addmeta(<table>) |
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