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8.6

Problem with dynamic_cast in VS 2008

Asked by Zoppo in C++ Programming Language, Microsoft Visual C++, Windows MFC Programming

Tags: VS 2008, C++

Hi everybody,

in my company we just finished to port a lot of code (about 3 million lines) from VC++ 6.0 to VS 2008.

It mostly works fine but we now encountered a problem which unfortunateley only occurs at runtime - here's an example:

We have two classes, let's say A and B, both derived from the same base class C. Now we have a function like this:

void foo ( A* pA )
{
 B* pB = dynamic_cast< B* >( pA );
 if ( NULL == pB )
 {
  pA->DoSomething();
  return;
 }
 pB->DoSomething();
}

I know, this is a very,very bad coding, I promise I would never do it, and I'm quite sure this is not allowed in C++ - but, the problem is we already found similar functions in our code, so there may be more, and they worked in VC 6++.

My question now is if anyone has an idea how it could be possible to find such places at compile time.

Thanks in advance,

ZOPPO
[+][-]05/15/08 07:53 AM, ID: 21574289Expert Comment

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[+][-]05/15/08 09:48 AM, ID: 21575680Accepted Solution

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About this solution

Zones: C++ Programming Language, Microsoft Visual C++, Windows MFC Programming
Tags: VS 2008, C++
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Solution Provided By: evilrix
Participating Experts: 2
Solution Grade: A
 
[+][-]05/19/08 02:57 AM, ID: 21596306Author Comment

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