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1 /*=============================================================================
2     Copyright (c) 2011 Eric Niebler
3
4     Distributed under the Boost Software License, Version 1.0. (See accompanying
5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6 ==============================================================================*/
7
8 #if !defined(BOOST_FUSION_ITERATOR_RANGE_SIZE_IMPL_HPP_INCLUDED)
9 #define BOOST_FUSION_ITERATOR_RANGE_SIZE_IMPL_HPP_INCLUDED
10
11 #include <boost/fusion/support/config.hpp>
12 #include <boost/fusion/iterator/distance.hpp>
13
14 namespace boost { namespace fusion
15 {
16     struct iterator_range_tag;
17
18     namespace extension
19     {
20         template <typename Tag>
21         struct size_impl;
22
23         template <>
24         struct size_impl<iterator_range_tag>
25         {
26             template <typename Seq>
27             struct apply
28               : result_of::distance<
29                     typename Seq::begin_type,
30                     typename Seq::end_type
31                 >
32             {};
33         };
34     }
35 }}
36
37 #endif
38