00zX: grammar fix

2010-04-22T02:28:58Z

grammar fix

Wormbo: Created page with 'The '''extends''' clause is a mandatory part of class declarations (except for class Object) and an optional part of Interface declarations, state declarations an…'

2009-11-07T08:49:39Z

Created page with 'The '''extends''' clause is a mandatory part of class declarations (except for class Object) and an optional part of Interface declarations, state declarations an…'

New page

The '''extends''' clause is a mandatory part of [[class declarations]] (except for class [[Object]]) and an optional part of [[Interface declarations]], [[state declarations]] and [[struct declarations]]. It defines that the declared item inherits members from the extended item. In case of classes and interfaces, the declared item is called subclass/subinterface or child class/interface of the extended item, while the extended class or interface is called superclass/superinterface or parent class/interface. Similar terminology could be used for extended states and structs, but is relatively uncommon there.

In [[Unreal Engine 1]], the '''extends''' keyword can also be replaced by the keyword '''expands'''. That keyword is actually used by default when creating new classes via [[UnrealEd]] and very early versions of the Unreal Engine don't even recognize the keyword '''extends''' yet.

==Syntax==
The most common use of an extends clause is a class declaration:
class ''ClassName'' extends ''ParentClass'';
The extends clause of a class declaration can be followed by a [[within clause]] and optional class modifiers.

Other usages of the extends clause are rare, but one example available in all Unreal Engine games is the ''Plane'' struct:
<uscript>
struct Plane extends Vector
{
var() config float W;
};
</uscript>
This declaration inherits the X, Y and Z components of the [[Vector]] struct and adds the W component.

{{navbox unrealscript}}

@@ Line 1: / Line 1: @@
 The '''extends''' clause is a mandatory part of [[class declarations]] (except for class [[Object]]) and an optional part of [[Interface declarations]], [[state declarations]] and [[struct declarations]]. It defines that the declared item inherits members from the extended item. In case of classes and interfaces, the declared item is called subclass/subinterface or child class/interface of the extended item, while the extended class or interface is called superclass/superinterface or parent class/interface. Similar terminology could be used for extended states and structs, but is relatively uncommon there.
-In [[Unreal Engine 1]], the '''extends''' keyword can also be replaced by the keyword '''expands'''. That keyword is actually used by default when creating new classes via [[UnrealEd]] and very early versions of the Unreal Engine don't even recognize the keyword '''extends''' yet.
+In [[Unreal Engine 1]], the '''extends''' keyword can also be replaced by the keyword '''expands'''. That keyword is actually used by default when creating new classes via [[UnrealEd]] and very early versions of the Unreal Engine will not recognize the keyword '''extends'''.
 ==Syntax==

Extends clause - Revision history

00zX: grammar fix

Wormbo: Created page with 'The '''extends''' clause is a mandatory part of class declarations (except for class Object) and an optional part of Interface declarations, state declarations an…'