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74 lines
3.1 KiB
Plaintext
74 lines
3.1 KiB
Plaintext
h1. MiddleClass
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Lua OOP classes usually end being:
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* multi-file libraries, too difficult to understand
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* very small libraries, not very powerful
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Middleclass attemps to be a mid-sized library (~130 lines of code, on a single file), with clean, easy to understand code, and yet powerful enough to be used in most cases.
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h1. Documentation
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See the "github wiki page":https://github.com/kikito/middleclass/wiki for examples & documentation.
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h1. Features
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* ~140 lines of code
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* top-level Object class
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* all methods are virtual
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* instance.class returns the instance's class
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* @Class.name@ returns the class name (a string)
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* @Class.super@ returns its super class
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* Class methods can be defined with Class.static.methodname
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* Subclassing:
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** @class(name)@ creates a subclass of @Object@
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** @class(name, Superclass)@ creates a subclass of the class @SuperClass@
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** @SuperClass:subclass(name)@ also creates a subclass of the class @SuperClass@
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* Instantiation:
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** Classes can define an @initialize@ method for initializing new instances. They can accept an arbitrary number of params.
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** Instances are created by doing @Class:new(params)@ or also @Class(params)@
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** SuperClass' methods can be used by using this syntax: @SuperClass.initialize(self, params)@.
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* support for Lua metamethods: just define a method called @__tostring@, @__add@, etc. and your instances will be able to use it.
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* Mixins:
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** A very simple mechanism for sharing functionality among a group of classes that are otherwise non-related.
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** Mixins are just simple lua tables with functions inside them.
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** @Class:include(mixin)@ will copy the function definitions of @mixin@ to @class@
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** If @mixin@ contains a function, called @included@, that function will be invoked right after the functions have been copied. It allows for modifying the class more profoundly.
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* The function @instanceOf(class, instance)@ returns @true@ if @instance@ is an instance of the class @Class@
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* The function @subclassOf(Superclass, Class)@ returns @true@ if @Class@ is a subclass of @SuperClass@
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* The function @includes(mixin, Class)@ returns @true@ if @Class@ (or one of its superclasses) includes @mixin@.
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Features left out:
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* metaclasses
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* classes are not Objects (instances are)
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* simulating a 'super' keyword (for performance concerns)
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h1. Installation
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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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<pre>require 'middleclass'</pre>
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The @package.path@ variable must be configured so that the folder in which middleclass.lua is copied is available, of course.
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Please make sure that you read the license, too (for your convenience it's now included at the beginning of the middleclass.lua file).
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h1. Specs
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This project uses "telescope":https://github.com/norman/telescope for its specs. If you want to run the specs, you will have to install telescope first. Then just execute the following from the root inspect folder:
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<pre>
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tsc -f spec/*
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</pre>
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h1. Performance tests
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Middleclass also comes with a small performance test suit. Just run the following commant:
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<pre>
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lua performance/run.lua
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</pre>
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