<?xml version="1.0" encoding="utf-8"?>

<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

<!-- This component and the accompanying materials are made available under the terms of the License 

"Eclipse Public License v1.0" which accompanies this distribution, 

and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->

<!-- Initial Contributors:

    Nokia Corporation - initial contribution.

Contributors: 

-->

<!DOCTYPE concept

  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">

<concept id="GUID-FF0330E8-81CA-52F3-AD60-89360B74B25D" xml:lang="en"><title>Using

CArrayVar&lt;TAny&gt;</title><shortdesc>The <codeph>CArrayVar&lt;TAny&gt;</codeph> class is useful for constructing

an array of variable length buffers, where the length is decided at run time.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<section id="GUID-763A4737-913B-417F-A9A6-CB1844EC64F6"><title>Arrays whose type is not known until class instantiation</title> <p>The <codeph>CArrayVar&lt;TAny&gt;</codeph> class

is useful for constructing an array of variable length buffers, where the

length is decided at run time. It is also useful as a data member of a base

class in a thin template class/base class pair,where the type of the array

element is not known until the owning thin template class is instantiated.</p> <p>For

example, to implement a stack of variable length objects of type <codeph>T</codeph>.</p> <codeblock id="GUID-4478A571-F004-5015-9D35-DBEABFDBCFF1" xml:space="preserve">class CExampleBase : public CBase

 {

public :

 ...

protected :

 ...

 void  PushL(const TAny* aPtr);

 TAny* Pop();

private :

 CArrayVar<TAny> iArray;

 }</codeblock> <codeblock id="GUID-3EEED66E-A71A-597D-82B5-E2EAD5AC93CC" xml:space="preserve">template &lt;class T&gt;

class CExample : public CExampleBase

 {

public :

 ...

 inline void PushL(const T* aPtr);

 inline T*   Pop();

 }</codeblock> </section>

</conbody></concept>