Objects and classes

Although Lua doesn't define classes in the language, it provides enough mechanisms to allow implementing classes. Guerilla implements its own class and object system.

Classes

To define a class, use class.

class ("MyClass")

To define the class constructor, define the construct method.

function MyClass:construct ()
    [...]
end

The ':' notation is a shortcut for first argument being self. The following definition is syntaxically equivalent to the previous:

function MyClass.construct (self)
    [...]
end

To derive a class from another/other class(es), add the names in order to the class call.

class ("MyClass", "Node", "AnotherClass")

Define a method with the same syntax as the constructor.

function MyClass:mymethod ()
    [...]
end

Objects

To create an object, call the class itself.

myObject = MyClass ()

The class constructor can have arguments, which are passed from the class calling.

function MyClass:construct (arg1, arg2)
    [...]
end

myObject = MyClass ("hip", "hop")

To call an object method, call the method with the ':' operator.

myObject:mymethod ()