Class APointerQueue

Unit

classwork

Declaration

type APointerQueue = class(APointerList)

Description

This class alters the behavior of APointerList so that it can be used as a queue (first in, first out). It does this by modifying the behavior of APointerList.pop so that it returns the first value in the list, instead of the last. Of course, like its parent, instances of APointerQueue can also be accessed as indexed arrays, if desired.

Hierarchy

• TObject
• AnObject
• APrintingObject
• ALinkedList
• APointerList
• APointerQueue

Overview

Methods

function pop: pointer; override;

Description

Methods

	function pop: pointer; override;
Remove the first reference from the list and return it to the caller. This method overrides the behavior inherited from APointerList.pop so that it returns the first reference in the list, instead of the last. If there are no items in the list, this method returns Nil.