Re: Why do I need to overload =

From:
Victor Bazarov <v.Abazarov@comAcast.net>
Newsgroups:
comp.lang.c++
Date:
Tue, 07 Oct 2008 15:56:22 -0400
Message-ID:
<gcget5$vcj$2@news.datemas.de>
John Doe wrote:

[..]
Hum I thinl I have understood why it couldn't work:

LPTSTR szXmlIn = NULL;
CString strXmlFmtOut;

m_OmaProv.ProcessConfigXML(szXmlIn, strXmlFmtOut);

When I call ProcessConfigXML , first argument is a C char array =>
CString objects are create temporarly then I save a pointer to ths
temporary object :

BOOL CProvisioning::ProcessConfigXML(const CString& strConfig, CString&
 strXmlOut)
{
 m_thrParam = ThreadParam(this, &strConfig, &strXmlOut);
...
}
So I suppose address of &strConfig is temporary ...

Am I wrong ?


If you're receiving a reference to some temporary object and holding
onto it, that's your problem. Don't do that. When your class has
references as members, you basically go into the *contract* that the
objects to which those members refer live *longer* than the object that
contains those references. If the referred objects have a shorter
lifetime than the object that needs them, fix the lifetime or fix the
ownership.

V
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