Assignment operator overloading

Class C
   Field x:T
   Method Assign( c:C )
      Self.x=x
   End
End

Function Main()
   Local c:C
   c=New C    'Null object error!
End

Struct Vec3
End

Struct Vec4
   Method Assign( v:Vec3 )   'prob. not a good idea...
   End
End

struct sVec4
{
    // ...

	void operator=(const sVec4& other)
	{
		x = other.x;
		y = other.y;
		z = other.z;
		w = other.w;
	}
};

Extern

    Struct sVec4
        Method Assign( other:sVec4 ) = "operator="
    End

template <class T>
class vector2d
{
public:
	vector2d<T>& operator= (const vector2d<T>&    other)    { X = other.X;     Y = other.Y;      return *this; }
	vector2d<T>& operator= (const dimension2d<T>& other)    { X = other.Width; Y = other.Height; return *this; }

	bool         operator==(const vector2d<T>& other) const { return equals(other); }

c=New C    'Null object error!

c = new C()  ' create
c = b        ' copy / assignment

Class/Struct Location
    pt:Point ptr
End

Local a:Location, b:Location

a = New Location()
b = a               ' <<    does it copy pointers only?
                    ' << or does it copy the contents of pt?