// In header: <boost/intrusive/pointer_rebind.hpp>
template<typename Ptr, typename U> 
struct pointer_has_rebind {
  // member classes/structs/unions
  template<typename V> 
  struct any {
    // construct/copy/destruct
    any(const V &);
  };
  // public static functions
  template<typename X> 
    static char test(int, typename X::template rebind< U > *);
  template<typename X> static int test(any< int >, void *);
  // public data members
  static const bool value;
};