3 // Copyright Thorsten Ottosen 2003-2004. 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)
8 // For more information, see http://www.boost.org/libs/range/
11 #ifndef BOOST_RANGE_DIFFERENCE_TYPE_HPP
12 #define BOOST_RANGE_DIFFERENCE_TYPE_HPP
18 #include <boost/mpl/and.hpp>
19 #include <boost/range/config.hpp>
20 #include <boost/range/iterator.hpp>
21 #include <boost/range/has_range_iterator.hpp>
22 #include <boost/iterator/iterator_traits.hpp>
23 #include <boost/type_traits/remove_reference.hpp>
27 namespace range_detail
29 template< class T, bool B = has_type<range_iterator<T> >::value >
30 struct range_difference
34 struct range_difference<T, true>
35 : iterator_difference<
36 BOOST_DEDUCED_TYPENAME range_iterator<T>::type
42 struct range_difference
43 : range_detail::range_difference<BOOST_DEDUCED_TYPENAME remove_reference<T>::type>