using a class inside a class.

I did some searching online and i couldn't find anything in reference
to this.

I am using MinGW, gcc 4.3 and am having the following compilation
issue:

class CFoo
{
public:
    ...
private:
    std::list<CFoo> m_children;
};

The complaint from the compiler looks like this:

c:\mingw\bin\../lib/gcc/i386-pc-mingw32/4.3.0/include/c++/bits/
boost_concept_check.h: In instantiation of
'__gnu_cxx::_SGIAssignableConcept<CFoo>':
c:\mingw\bin\../lib/gcc/i386-pc-mingw32/4.3.0/include/c++/bits/
stl_list.h:420:   instantiated from 'std::list<CFoo,
std::allocator<CFoo> >'
c:\mingw\bin\../lib/gcc/i386-pc-mingw32/4.3.0/include/c++/bits/
boost_concept_check.h:216: error:
'__gnu_cxx::_SGIAssignableConcept<_Tp>::__a' has incomplete type

So, basically, I think what it's saying is that it doesn't know how to
build the class because CFoo hasn't been defined by the time it's
trying to create it (i.e. incomplete type).  I tried adding
"std::list<class CFoo>" as well, but that didn't work either.  This
compiles on visual studio with some warnings.

I can make this work by making it "std::list<CFoo*>", but I'm
wondering if there's a way to get this to work as defined.

thanks for listening.

-phil