stefan, wasn't the idea here to allow us to save
memory storage in the PathImpl? Could you convince
me that your complex IDL types are going to be
more memory efficient than:

enum PathSegmentType { move, line, conic, cubic };
struct PathSegment
{
  Vertex to, cp1, cp2;
  PathSegmentType type;
};

in straight C++ (not burdened with CORBA anything)?