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at:tutorial:objects [2007/06/29 14:49] jorgeat:tutorial:objects [2007/07/02 11:24] jorge
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 ===== Delegation and cloning ===== ===== Delegation and cloning =====
-AmbientTalk features object inheritance or delegation. By means of delegation, an object can reuse and extend the defintion of another establishing a parent-child relationship. We identify two kinds of delegation relationships: **IS-A** and **SHARE-A**. These relationships define two different semantics for clonning child objects. Whereas clonning a **IS-A** child also clones its parent, **SHARE-A** child shares the parent of the cloned object.+AmbientTalk features object inheritance or delegation. By means of delegation, an object can reuse and extend the defintion of another establishing a parent-child relationship. We identify two kinds of delegation relationships: **IS-A** and **SHARE-A**. These relationships define two different semantics for clonning child objects. Whereas clonning a **IS-A** child also clones its parent, **SHARE-A** child shares the parent of the cloned object (see the figure below). 
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 +{{:at:tutorial:isaversussharea.png|:at:tutorial:isaversussharea.png}} 
  
 The following code shows how to extend objects with a **IS-A** relationship. It uses the ''extend: with:'' language construct. The following code shows how to extend objects with a **IS-A** relationship. It uses the ''extend: with:'' language construct.
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 ===== Encapsulation ===== ===== Encapsulation =====
-In AmbientTalk, all fields and methods are "public" via selection. Still, a field or method can be made "private" by means of lexical scoping. The following code shows the definition of an object inside the definition of a function. As such, the fields and methods of this object cannot be accessed directly from outside the funuction.+In AmbientTalk, all fields and methods are "public" via selection. Still, a field or method can be made "private" by means of lexical scoping. The following code shows the definition of an object inside the definition of a function. The fields and methods of this object cannot be accessed directly from outside the funuction.
  
 <code> <code>
at/tutorial/objects.txt · Last modified: 2013/05/17 20:23 by tvcutsem