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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 | #if !defined(BOOST_FUSION_FOLD_S_HPP_INCLUDED) | |
8 | #define BOOST_FUSION_FOLD_S_HPP_INCLUDED | |
9 | ||
10 | #include <boost/fusion/support/config.hpp> | |
11 | #include <boost/fusion/algorithm/iteration/fold_fwd.hpp> | |
12 | #include <boost/fusion/support/segmented_fold_until.hpp> | |
13 | #include <boost/mpl/bool.hpp> | |
14 | ||
15 | namespace boost { namespace fusion { namespace detail | |
16 | { | |
17 | template <typename Fun> | |
18 | struct segmented_fold_fun | |
19 | { | |
20 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
21 | explicit segmented_fold_fun(Fun const& f) | |
22 | : fun(f) | |
23 | {} | |
24 | ||
25 | Fun const& fun; | |
26 | ||
27 | template <typename Sequence, typename State, typename Context> | |
28 | struct apply | |
29 | { | |
30 | typedef typename result_of::fold<Sequence, State, Fun>::type type; | |
31 | typedef mpl::true_ continue_type; | |
32 | ||
33 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
34 | static type call(Sequence& seq, State const& state, Context const&, segmented_fold_fun const& fun) | |
35 | { | |
36 | return fusion::fold(seq, state, fun.fun); | |
37 | } | |
38 | }; | |
39 | }; | |
40 | ||
41 | // The default implementation of this lives in detail/fold.hpp | |
42 | template <typename Sequence, typename State, typename Fun, bool IsSequence, bool IsSegmented> | |
43 | struct result_of_fold; | |
44 | ||
45 | template <typename Sequence, typename State, typename Fun> | |
46 | struct result_of_fold<Sequence, State, Fun, true, true> | |
47 | { | |
48 | typedef | |
49 | typename result_of::segmented_fold_until< | |
50 | Sequence, | |
51 | State, | |
52 | segmented_fold_fun<Fun> | |
53 | >::type | |
54 | type; | |
55 | ||
56 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
57 | static type call(Sequence& seq, State& state, Fun& fun) | |
58 | { | |
59 | return fusion::segmented_fold_until(seq, state, segmented_fold_fun<Fun>(fun)); | |
60 | } | |
61 | }; | |
62 | }}} | |
63 | ||
64 | #endif |