ASSERTing a class ref

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C++

MFC

Working on an old project, I found some code that appears to be ASSERTing a class reference.

class classA
{
public:
...
classB myClassB;
};

classA::classA
{
ASSERT (myClassB);
}

I can't even get this syntax to compile in a brand new C++ project (VS2012).

We do have our own definition of ASSERT which goes

#define ASSERT(statement)                                       \
    if (!(statement))                                           \
    {                                                           \
        logAssertion (TEXT(#statement), __FILE__, __LINE__);    \
    }

(The one in the MS includes (afh.h) looks like this)

#define ASSERT(f)          DEBUG_ONLY((void) ((f) || !::AfxAssertFailedLine(THIS_FILE, __LINE__) || (AfxDebugBreak(), 0)))

classB is derived from CWnd, it seems to pass the ASSERT when its HWND is non NULL (this is just a guess, though that is the intention of the ASSERT in the old code). Is there an operator in the class that could be responsible for this sort of validity check?


Edit ---


In my old code .... if I assert on a CString it compiles, if I ASSERT on a primitive class like ClassA above it fails to compile on

error C2675: unary '!' : 'classA' does not define this operator or a conversion to a type acceptable to the predefined operator