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Hello,

I am trying to create my own surface_3 type for the surface mesh generation,
and ran into an error I can't diffuse. This is the essence of my definition
code:

(Line3D, Segment3D and Ray3D were defined in another file as the regular
kernel::line_3 etc.)

class MeshSurface{
public:
        
        class MeshIntersect{
        public:
                CGAL::Object operator()(MeshSurface surface, Line3D l);
                CGAL::Object operator()(MeshSurface surface, Ray3D l);
                CGAL::Object operator()(MeshSurface surface, Segment3D l);

                MeshIntersect(){}
                ~MeshIntersect(){}
        };

        class MeshInitialPoints{
        public:

                template <class OutputIteratorPoints>
                OutputIteratorPoints operator()(MeshSurface surface,
OutputIteratorPoints pts, int n=20)
                {
                        .....
                                }
                        }
                }
                MeshInitialPoints(){}
                ~MeshInitialPoints(){}
                MeshInitialPoints(const MeshInitialPoints& mip){}
                MeshInitialPoints& operator=(const MeshInitialPoints&
mip){return (*this);}
        };



        class MeshTraits{
        public:
                typedef Point3D    Point_3;
                typedef Segment3D  Segment_3;
                typedef Ray3D      Ray_3;
                typedef Line3D     Line_3;
                typedef MeshSurface Surface_3;
                typedef MeshIntersect Intersect_3;
                typedef MeshInitialPoints Construct_initial_points;

                MeshIntersect intersect_3_object (){return MeshIntersect();}
                MeshInitialPoints construct_initial_points_object (){return
MeshInitialPoints();} 
                MeshTraits(){}
                ~MeshTraits(){}
                MeshTraits(const MeshTraits& mi){}
                MeshTraits& operator=(const MeshTraits& mi){return (*this);}
        };

        typedef MeshTraits Surface_mesher_traits_3;

        MeshSurface():{...}
        MeshSurface(const MeshSurface& ms){...}
        MeshSurface& operator=(const MeshSurface& ms){return MeshSurface(ms);}
        ~MeshSurface(){...};    
};

I get the error "error C2662:
'MeshSurface::MeshTraits::construct_initial_points_object' : cannot convert
'this' pointer from 'const MeshSurface::MeshTraits' to 
'MeshSurface::MeshTraits
&'    c:\program files\cgal-3.3\include\cgal\make_surface_mesh.h". 

I do have a copy constructor for MeshTraits, so I am missing something here.
Why does that happens?

Thanks,
Amir Vaxman