| 1 | /*============================================================================= |
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| 2 | Copyright (c) 2003 Joel de Guzman |
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| 3 | Copyright (c) 2004 Peder Holt |
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| 4 | |
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| 5 | Use, modification and distribution is subject to the Boost Software |
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| 6 | License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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| 7 | http://www.boost.org/LICENSE_1_0.txt) |
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| 8 | ==============================================================================*/ |
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| 9 | #if !defined(FUSION_ALGORITHM_FOLD_HPP) |
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| 10 | #define FUSION_ALGORITHM_FOLD_HPP |
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| 11 | |
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| 12 | #include <boost/spirit/fusion/algorithm/detail/fold.ipp> |
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| 13 | |
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| 14 | namespace boost { namespace fusion |
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| 15 | { |
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| 16 | namespace meta |
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| 17 | { |
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| 18 | template <typename Sequence, typename State, typename F> |
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| 19 | struct fold |
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| 20 | { |
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| 21 | typedef typename |
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| 22 | detail::static_fold< |
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| 23 | typename meta::begin<Sequence>::type |
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| 24 | , typename meta::end<Sequence>::type |
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| 25 | , State |
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| 26 | , F |
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| 27 | >::type |
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| 28 | type; |
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| 29 | }; |
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| 30 | } |
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| 31 | |
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| 32 | namespace function |
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| 33 | { |
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| 34 | struct fold |
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| 35 | { |
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| 36 | template <typename Sequence, typename State, typename F> |
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| 37 | struct apply : meta::fold<Sequence, State, F> {}; |
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| 38 | |
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| 39 | template <typename Sequence, typename State, typename F> |
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| 40 | inline typename apply<Sequence const, State, F>::type |
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| 41 | operator()(Sequence const& seq, State const& state, F const& f) const |
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| 42 | { |
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| 43 | return detail::fold( |
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| 44 | fusion::begin(seq) |
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| 45 | , fusion::end(seq) |
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| 46 | , state |
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| 47 | , f |
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| 48 | , is_same< |
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| 49 | BOOST_DEDUCED_TYPENAME meta::begin<Sequence const>::type |
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| 50 | , BOOST_DEDUCED_TYPENAME meta::end<Sequence const>::type>() |
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| 51 | ); |
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| 52 | } |
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| 53 | |
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| 54 | template <typename Sequence, typename State, typename F> |
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| 55 | inline typename apply<Sequence, State, F>::type |
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| 56 | operator()(Sequence& seq, State const& state, F const& f) const |
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| 57 | { |
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| 58 | return detail::fold( |
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| 59 | fusion::begin(seq) |
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| 60 | , fusion::end(seq) |
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| 61 | , state |
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| 62 | , f |
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| 63 | , is_same< |
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| 64 | BOOST_DEDUCED_TYPENAME meta::begin<Sequence>::type |
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| 65 | , BOOST_DEDUCED_TYPENAME meta::end<Sequence>::type>() |
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| 66 | ); |
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| 67 | } |
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| 68 | }; |
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| 69 | } |
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| 70 | |
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| 71 | function::fold const fold = function::fold(); |
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| 72 | }} |
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| 73 | |
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| 74 | #endif |
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| 75 | |
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