1// { dg-do compile }
2
3namespace internal {
4    template < class DSC, bool Const >   struct CC_iterator   {
5	typedef CC_iterator iterator;
6	typedef typename DSC::value_type value_type;
7	typedef const value_type* pointer;
8	CC_iterator ()     ;
9	CC_iterator (const iterator &it)     {
10	}
11	pointer p;
12	pointer operator->() const ;
13    };
14}
15template < class T > struct Compact_container {
16    typedef Compact_container <T> Self;
17    typedef T value_type;
18    typedef internal::CC_iterator<Self, false> iterator;
19};
20template < typename TDS = void > struct Periodic_3_triangulation_ds_cell_base_3 {
21    typedef typename TDS::Vertex_handle Vertex_handle;
22    const Vertex_handle& vertex(int i) const   {
23    }
24};
25struct Triangulation_data_structure_3    {
26    typedef Triangulation_data_structure_3 Tds;
27    typedef Periodic_3_triangulation_ds_cell_base_3<Tds> Cell;
28    typedef Compact_container<Cell> Cell_range;
29    typedef Compact_container<int> Vertex_range;
30    typedef typename Cell_range::iterator Cell_handle;
31    typedef typename Vertex_range::iterator Vertex_handle;
32};
33typedef Triangulation_data_structure_3 TDS1;
34template <  class > struct Periodic_3_Delaunay_triangulation_3 {
35    typedef TDS1::Vertex_handle Vertex_handle;
36    typedef TDS1::Cell_handle Cell_handle;
37    int compare_distance() const {
38    }
39    Vertex_handle nearest_vertex() const;
40};
41template < class Tds > typename Periodic_3_Delaunay_triangulation_3<Tds>::Vertex_handle Periodic_3_Delaunay_triangulation_3<Tds>::nearest_vertex() const {
42    Cell_handle c ;
43    Vertex_handle nearest = c->vertex(0);
44    nearest = (compare_distance() == -1) ?       nearest : c->vertex(0);
45    return nearest;
46}
47typedef Periodic_3_Delaunay_triangulation_3<TDS1> PDT1;
48struct Periodic_3_triangulation_hierarchy_3   : PDT1 {
49    Vertex_handle   nearest_vertex() const;
50};
51Periodic_3_triangulation_hierarchy_3::Vertex_handle Periodic_3_triangulation_hierarchy_3:: nearest_vertex() const {
52    return PDT1::nearest_vertex();
53}
54