distance.hpp 988 B

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  1. // Boost.Range library
  2. //
  3. // Copyright Thorsten Ottosen 2003-2006. Use, modification and
  4. // distribution is subject to the Boost Software License, Version
  5. // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  6. // http://www.boost.org/LICENSE_1_0.txt)
  7. //
  8. // For more information, see http://www.boost.org/libs/range/
  9. //
  10. #ifndef BOOST_RANGE_DISTANCE_HPP
  11. #define BOOST_RANGE_DISTANCE_HPP
  12. #if defined(_MSC_VER)
  13. # pragma once
  14. #endif
  15. #include <boost/iterator/distance.hpp>
  16. #include <boost/range/begin.hpp>
  17. #include <boost/range/end.hpp>
  18. #include <boost/range/difference_type.hpp>
  19. namespace boost
  20. {
  21. namespace range_distance_adl_barrier
  22. {
  23. template< class T >
  24. inline BOOST_CXX14_CONSTEXPR BOOST_DEDUCED_TYPENAME range_difference<T>::type
  25. distance( const T& r )
  26. {
  27. return boost::iterators::distance( boost::begin( r ), boost::end( r ) );
  28. }
  29. }
  30. using namespace range_distance_adl_barrier;
  31. } // namespace 'boost'
  32. #endif