A simple OOP library for Lua. It has inheritance, metamethods (operators), class variables and weak mixin support.
local class = require 'middleclass' local Fruit = class('Fruit') -- 'Fruit' is the class' name function Fruit:initialize(sweetness) self.sweetness = sweetness end Fruit.static.sweetness_threshold = 5 -- class variable (also admits methods) function Fruit:isSweet() return self.sweetness > Fruit.sweetness_threshold end local Lemon = class('Lemon', Fruit) -- subclassing function Lemon:initialize() Fruit.initialize(self, 1) -- invoking the superclass' initializer end local lemon = Lemon:new() print(lemon:isSweet()) -- false
See the github wiki page for examples & documentation.
You can read the
CHANGELOG.md file to see what has changed on each version of this library.
If you need help updating to a new middleclass version, read
Just copy the middleclass.lua file wherever you want it (for example on a lib/ folder). Then write this in any Lua file where you want to use it:
local class = require 'middleclass'
This project uses busted for its specs. If you want to run the specs, you will have to install it first. Then just execute the following:
cd /folder/where/the/spec/folder/is busted
Middleclass also comes with a small performance test suite. Just run the following command:
Middleclass is distributed under the MIT license.