function class(base, init)

The Class interface
This function is used to generate class constructors that support
inheritance to allow more sophisticated object oriented design.

Inheritance allows using all methods in subclasses.
Attention: Fields will not be available in the subclass!

Example:

 Constructor = class(

     function(self, arg)

         -- This is the actual constructor!

         self.somevar = arg

     end

 )



 ConstructorChild = class( Constructor,

     function(self, arg)

          self.somevar = arg

     end

 )



 function Constructor:someMethod()

     -- Do something!

 end

Taken from: lua-users.org

class.lua

Compatible with Lua 5.1 (not 5.0).