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81 lines
2.0 KiB
Markdown
81 lines
2.0 KiB
Markdown
middleclass
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===========
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[](https://travis-ci.org/kikito/middleclass)
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[](https://coveralls.io/github/kikito/middleclass?branch=master)
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A simple OOP library for Lua. It has inheritance, metamethods (operators), class variables and weak mixin support.
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Quick Look
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==========
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```lua
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local class = require 'middleclass'
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local Fruit = class('Fruit') -- 'Fruit' is the class' name
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function Fruit:initialize(sweetness)
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self.sweetness = sweetness
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end
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Fruit.static.sweetness_threshold = 5 -- class variable (also admits methods)
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function Fruit:isSweet()
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return self.sweetness > Fruit.sweetness_threshold
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end
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local Lemon = class('Lemon', Fruit) -- subclassing
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function Lemon:initialize()
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Fruit.initialize(self, 1) -- invoking the superclass' initializer
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end
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local lemon = Lemon:new()
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print(lemon:isSweet()) -- false
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```
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Documentation
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=============
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See the [github wiki page](https://github.com/kikito/middleclass/wiki) for examples & documentation.
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You can read the `CHANGELOG.md` file to see what has changed on each version of this library.
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If you need help updating to a new middleclass version, read `UPDATING.md`.
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Installation
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============
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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:
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```lua
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local class = require 'middleclass'
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```
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Specs
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=====
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This project uses [busted](http://olivinelabs.com/busted/) for its specs. If you want to run the specs, you will have to install it first. Then just execute the following:
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```bash
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cd /folder/where/the/spec/folder/is
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busted
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```
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Performance tests
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=================
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Middleclass also comes with a small performance test suite. Just run the following command:
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```bash
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lua performance/run.lua
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```
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License
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=======
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Middleclass is distributed under the MIT license.
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