// In header: <boost/range_run_storage/concepts.hpp>

template<typename S> 
struct Run {
  // types
  typedef result_of< op::offset(typename add_reference< S >::type) >::type offset_type;   
  typedef result_of< op::length(typename add_reference< S >::type) >::type length_type;   
  typedef traits::is_unit_run< S >::type                                   is_unit_length;

  // construct/copy/destruct
  ~Run();
};