Re: How to override a MFC macro template

From:
"Ben Voigt [C++ MVP]" <bvoigt@newsgroup.nospam>
Newsgroups:
microsoft.public.vc.language
Date:
Thu, 24 Sep 2009 09:28:52 -0500
Message-ID:
<Of8QYNSPKHA.2092@TK2MSFTNGP04.phx.gbl>
Igor Tandetnik wrote:

Alexh <alexh1@sbcglobal.net> wrote:

I have created my own SerializeElements() function but when I run the
code it still uses MFC's version.

I have the following line in my .h file -

class MyClass : Cobject
{
....
};

void AFXAPI SerializeElements(CArchive& ar,CChartInfo* pChartInfo,
int nCount);


I believe you need to specialize SerializeElements template for your
type, rather than overloading it with a non-template function. Like
this:

template<>
void AFXAPI SerializeElements<CCharInfo>(CArchive& ar,CChartInfo*
pChartInfo, int
nCount);

The code in CList::Serialize calls SerializeElements with explicit
template parameter list, like this:

SerializeElements<TYPE>(ar, pData, 1);

This call will never pick a non-template overload.


Also be careful that the specialization is in scope every time
CList<CChartInfo> is used. The compiler won't generate calls to functions
it doesn't know about.

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