This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision | ||
at:tutorial:objects [2007/06/27 12:13] jorge |
at:tutorial:objects [2013/05/17 20:23] tvcutsem updated |
||
---|---|---|---|
Line 1: | Line 1: | ||
- | In this section, we explain how the object-oriented programming paradigm is implemented in AmbientTalk. | ||
- | |||
- | ===== Objects, fields and methods ===== | ||
- | In AmbientTalk, | ||
- | classes. Rather, they are either created ex-nihilo or by cloning | ||
- | and adapting existing objects, like prototypes in the SELF programming language. The definition of such a prototypical object contains a number of fields and methods that represent the object' | ||
- | |||
- | The following code illustrates the ex-nihilo creation of an object: | ||
- | |||
- | < | ||
- | > def Point := object: { | ||
- | def x := 0; | ||
- | def y := 0; | ||
- | def init(xCoord, | ||
- | x := xCoord; | ||
- | y := yCoord; | ||
- | }; | ||
- | def sumOfSquares() { x*x + y*y }; | ||
- | } | ||
- | >>< | ||
- | </ | ||
- | |||
- | As all definitions in AmbientTalk, | ||
- | This object can be instantiated to create new points as follows: | ||
- | |||
- | < | ||
- | > def initialPoint := Point.new(0, | ||
- | >>< | ||
- | </ | ||
- | |||
- | Every object understands the message '' | ||
- | |||
- | ===== Sending messages ===== | ||
- | In AmbientTalk, | ||
- | |||
- | ===== Cloning and instantiation ===== | ||
- | |||
- | |||
- | |||
- | ===== Delegation and Dynamic Inheritance ===== | ||
- | |||
- | ===== Delegation and cloning ===== | ||
- | |||
- | ===== First-class Delegation ===== | ||
- | |||
- | ===== Encapsulation ===== | ||