Here's a special bit of MFC arcana that took quite a while to figure out! How do we serialize a CRuntimeClass
? Here's an example of how to do it from force.cpp file. The long comment explains why this was a difficult thing to do.
void cForceClassEvade::Serialize(CArchive &ar)
/* I had a hard time figuring out how to serialize the
(1) You can't call _pnodeclass.Serialize(ar), as this is
not a method of CRuntimeClass.
(2) Nor can you save off the CRuntimeClass m_lpszClassName
field and try and use RUNTIME_CLASS to reconstruct it,
as RUNTIME_CLASS requires a literal argument and not a
(3) MFC provides a CArchive::SerializeClass(CRuntimeClass
*prtc). But it doesn't do the job either. It's
actually designed more for use as a compatibility
type-checker. If I put in
ar.SerializeClass(_pnodeclass), when I save and load,
I don't get anything read back into _pnodeclass
because SerializeClass treats its argument as a const
and won't change it in the load!
(4) What DOES work is to save with
ar.WriteClass(_pnodeclass) and load with
_pnodeclass = ar.ReadClass(). */
if (ar.IsStoring()) //Writing data.
ar << _evadechildclasses << _dartacceleration << _dartspeedup;
else //reading data
_pnodeclass = ar.ReadClass();
ar >> _evadechildclasses >> _dartacceleration >> _dartspeedup;