boost/range/distance.hpp

0001 // Boost.Range library
0002 //
0003 //  Copyright Thorsten Ottosen 2003-2006. Use, modification and
0004 //  distribution is subject to the Boost Software License, Version
0005 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
0006 //  http://www.boost.org/LICENSE_1_0.txt)
0007 //
0008 // For more information, see http://www.boost.org/libs/range/
0009 //
0010
0011 #ifndef BOOST_RANGE_DISTANCE_HPP
0012 #define BOOST_RANGE_DISTANCE_HPP
0013
0014 #if defined(_MSC_VER)
0015 # pragma once
0016 #endif
0017
0018 #include <boost/iterator/distance.hpp>
0019 #include <boost/range/begin.hpp>
0020 #include <boost/range/end.hpp>
0021 #include <boost/range/difference_type.hpp>
0022
0023 namespace boost
0024 {
0025
0026     namespace range_distance_adl_barrier
0027     {
0028         template< class T >
0029         inline BOOST_CXX14_CONSTEXPR BOOST_DEDUCED_TYPENAME range_difference<T>::type
0030         distance( const T& r )
0031         {
0032             return boost::iterators::distance( boost::begin( r ), boost::end( r ) );
0033         }
0034     }
0035
0036     using namespace range_distance_adl_barrier;
0037
0038 } // namespace 'boost'
0039
0040 #endif