7 Nokia Corporation - initial contribution. |
7 Nokia Corporation - initial contribution. |
8 Contributors: |
8 Contributors: |
9 --> |
9 --> |
10 <!DOCTYPE concept |
10 <!DOCTYPE concept |
11 PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
11 PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd"> |
12 <concept xml:lang="en" id="GUID-1FC0156C-7BDB-5D5B-9860-837DAB431D24"><title>How to implement and use NewLC()</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>When an object is created through <codeph>NewLC()</codeph>, use <codeph>CleanupStack::PopAndDestroy()</codeph> to destroy the object when its use is complete.</p> <codeblock id="GUID-34A7790B-1FA9-58FA-83D9-A2CF6C07F2F2" xml:space="preserve">static CExample* CExample::NewLC() |
12 <concept id="GUID-1FC0156C-7BDB-5D5B-9860-837DAB431D24" xml:lang="en"><title>How to |
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13 implement and use NewLC()</title><shortdesc>This document describes how to destroy objects created with <codeph>NewLC()</codeph>.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody> |
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14 <p>When an object is created through <codeph>NewLC()</codeph>, use <codeph>CleanupStack::PopAndDestroy()</codeph> to |
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15 destroy the object when its use is complete.</p> |
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16 <codeblock id="GUID-34A7790B-1FA9-58FA-83D9-A2CF6C07F2F2" xml:space="preserve">static CExample* CExample::NewLC() |
13 { |
17 { |
14 CExample* self = new (ELeave) CExample(); |
18 CExample* self = new (ELeave) CExample(); |
15 CleanupStack::PushL(self); |
19 CleanupStack::PushL(self); |
16 self->ConstructL(); |
20 self->ConstructL(); |
17 return self; |
21 return self; |
18 }</codeblock> <codeblock id="GUID-421A377A-7192-5908-A1C6-E3941046D489" xml:space="preserve">void doExampleL() |
22 }</codeblock> |
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23 <codeblock id="GUID-421A377A-7192-5908-A1C6-E3941046D489" xml:space="preserve">void doExampleL() |
19 { |
24 { |
20 // allocate and push to cleanup stack - leave if failed |
25 // allocate and push to cleanup stack - leave if failed |
21 CExample* myExample = CExample::NewLC(); |
26 CExample* myExample = CExample::NewLC(); |
22 // do something that might leave |
27 // do something that might leave |
23 myExample->DoSomethingL(); |
28 myExample->DoSomethingL(); |
24 // pop from cleanup stack and destroy |
29 // pop from cleanup stack and destroy |
25 CleanupStack::PopAndDestroy(); |
30 CleanupStack::PopAndDestroy(); |
26 }</codeblock> </conbody></concept> |
31 }</codeblock> |
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32 </conbody></concept> |