Classes and objects

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Simulation of other Paradigms and Continuations - slide 3 : 43

Classes and objects

Due to (1) the first class status of functions, and due to (2) the use of static binding of free names, it is possible to interpret a closure as an object

With this interpretation, it is possible to regard certain function definitions as classes

Object model:
- Objects are instances of classes
- Objects interact by means of message passing
- Methods are dynamically looked up (in the classes behind the objects)
  - All methods are virtual

The definition of a 'class Point ' with methods getx , gety , add , and type-of.

The send method which is used in the Point class.

Points and Rectangle