Awesome

LowerClass

A simple OOP library for Lua. It has complex inheritance, metamethod support, and weak mixin support.

[!NOTE] This is heavily inspired by middleclass by kikito. Many parts of the code are directly copied, and the core functionallity is modeled after it. I love MiddleClass but found a few features limiting, hence why LowerClass was developed. All changes can be found here

Quick Look

local class = require 'lowerclass'

local Fruit = class('fruit')

function Fruit:__init(sweetness)
  self.sweetness = sweetness
end

local Colorful = class('colorful')

function Colorful:__init(color)
  self.color = color
end

local Lemon = class('Lemon', Fruit, Colorful)

function Lemon:__init(color, sweetness)
  Fruit.__init(self, sweetness)
  Colorful.__init(self, color)
end

local lemon = Lemon:new('blue', 10)

Quick Docs

LowerClass

• LowerClass(name: str, ...: mixin|class) => Class - Generates a new class.
• LowerClass.type(obj: any) => string - Returns the type of a passed object (Defaults to lua's type() if a non-class/instance type is passed)

Class

• Class.name - name of the class
• Class:new(...) => Instance - Generates a new instance of a class, passing all args __init(...)
• Class:is(otherClass) => Boolean - Checks if the calling class inherits (is a sub-child) of otherClass.
• Class:include(...: mixin|class) - Either mixes in a table or adds the passed class as a parent of the calling class.

Instance

• Instance.class Pointer to the instance's class
• Instance:is(otherClass) => Boolean Checks if instance inherits (is a sub-child) of otherClass.
• Instance:include(...: mixin) - Copies all functions from a mixin directyly to the calling instance.