CGAL users discussion list

[Ben Laurie <>]

I want to write a template function that does something to a mesh, but without assuming anything about how the mesh is defined (i.e. I don't know what the kernel is).

I thought I could do something like this:

template<class Mesh>
void someFn(const Mesh &m)
    {
    typedef typename CGAL::Kernel_traits<Mesh>::Kernel Kernel;

    typedef typename Kernel::Point_3 Point;

   ...

but this gives me errors like:

      'CGAL::internal_kernel_traits::Dummy_kernel<CGAL::Surface_mesh<CGAL::Point_3<CGAL::Epeck>
      > >'
    typedef typename CGAL::Kernel_traits<Mesh>::Kernel::Point_3 Point;

What am I doing wrong?