| /*============================================================================= |
| Copyright (c) 2006 Eric Niebler |
| |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| ==============================================================================*/ |
| #if !defined(FUSION_SIZE_S_08112006_1141) |
| #define FUSION_SIZE_S_08112006_1141 |
| |
| #include <boost/mpl/plus.hpp> |
| #include <boost/mpl/size_t.hpp> |
| #include <boost/type_traits/remove_reference.hpp> |
| #include <boost/fusion/algorithm/iteration/fold.hpp> |
| #include <boost/fusion/support/ext_/is_segmented.hpp> |
| #include <boost/fusion/sequence/intrinsic/ext_/segments.hpp> |
| |
| namespace boost { namespace fusion |
| { |
| /////////////////////////////////////////////////////////////////////////// |
| // calculates the size of any segmented data structure. |
| template<typename Sequence, bool IsSegmented = traits::is_segmented<Sequence>::value> |
| struct segmented_size; |
| |
| namespace detail |
| { |
| struct size_plus |
| { |
| template<typename Sig> |
| struct result; |
| |
| template<typename This, typename State, typename Seq> |
| struct result<This(State, Seq)> |
| : mpl::plus< |
| segmented_size<typename remove_reference<Seq>::type> |
| , typename remove_reference<State>::type |
| > |
| {}; |
| }; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| template<typename Sequence, bool IsSegmented> |
| struct segmented_size |
| : result_of::fold< |
| typename result_of::segments<Sequence>::type |
| , mpl::size_t<0> |
| , detail::size_plus |
| >::type |
| {}; |
| |
| template<typename Sequence> |
| struct segmented_size<Sequence, false> |
| : result_of::size<Sequence> |
| {}; |
| }} |
| |
| #endif |