Symbian3/SDK/Source/GUID-8DF1C625-7963-55E9-BEEC-C9E37936F8CF.dita
author Dominic Pinkman <dominic.pinkman@nokia.com>
Tue, 20 Jul 2010 12:00:49 +0100
changeset 13 48780e181b38
parent 0 89d6a7a84779
permissions -rw-r--r--
Week 28 contribution of SDK documentation content. See release notes for details. Fixes bugs Bug 1897 and Bug 1522.
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<?xml version="1.0" encoding="utf-8"?>
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
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<!-- This component and the accompanying materials are made available under the terms of the License 
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"Eclipse Public License v1.0" which accompanies this distribution, 
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
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<!-- Initial Contributors:
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    Nokia Corporation - initial contribution.
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Contributors: 
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-->
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<!DOCTYPE concept
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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
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<concept id="GUID-8DF1C625-7963-55E9-BEEC-C9E37936F8CF" xml:lang="en"><title>How
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to use User::Leave()</title><shortdesc>Provides a code snippet to explain how to use <codeph>User::Leave()</codeph>.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
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<p>You can use the <codeph>User::Leave()</codeph> function to terminate a
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function’s processing immediately when an exception condition occurs. In the
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example below, if the <codeph>new</codeph> fails, the function calls <codeph>User::Leave()</codeph> with
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an error code. The return type of the function is <codeph>void</codeph>, because
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it is not necessary to use it to return error information.</p>
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<codeblock id="GUID-98542124-DB23-5A8F-8387-F0781B32D1F2" xml:space="preserve">void doExampleL()
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 { 
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 CExample* myExample = new CExample;
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 if (!myExample) User::Leave(KErrNoMemory); 
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 // leave used in place of return to indicate an error
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 // do something
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 myExample-&gt;iInt = 5;
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 testConsole.Printf(_LIT("Value of iInt is %d.\n"),myExample-&gt;iInt);
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 // delete
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 delete myExample;
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 }</codeblock>
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<section id="GUID-98FF9DEC-DC09-43DE-ABAD-3EE9C2597A85"><title>Notes</title> <ul>
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<li id="GUID-7891ACB0-D39E-5982-BF3E-43DD01281F77"><p>the <codeph>L</codeph> suffix
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on a function name indicates that it may leave</p> </li>
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</ul> </section>
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</conbody></concept>