Yes, but it has to be some form of pointer or reference.
A class can’t contain an instance of itself directly because until the compiler has finished processing the class, it doesn’t know how big that type will be. However, since a pointer (or reference) is always the same size, it can handle that just fine.
// This will work
struct Wooble
{
Wooble *w;
};
// This will not
struct Wooble
{
Wooble w;
};
