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1 | // Copyright 2005 Daniel Wallin. | |
2 | // Copyright 2005 Joel de Guzman. | |
3 | // Copyright 2005 Dan Marsden. | |
4 | // | |
5 | // Use, modification and distribution is subject to the Boost Software | |
6 | // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt) | |
8 | // | |
9 | // Modeled after range_ex, Copyright 2004 Eric Niebler | |
10 | ||
11 | #ifndef BOOST_PHOENIX_ALGORITHM_ITERATION_HPP | |
12 | #define BOOST_PHOENIX_ALGORITHM_ITERATION_HPP | |
13 | ||
14 | #include <algorithm> | |
15 | #include <numeric> | |
16 | ||
17 | #include <boost/phoenix/stl/algorithm/detail/begin.hpp> | |
18 | #include <boost/phoenix/stl/algorithm/detail/end.hpp> | |
19 | ||
20 | #include <boost/phoenix/function/adapt_callable.hpp> | |
21 | ||
22 | namespace boost { namespace phoenix { | |
23 | namespace impl | |
24 | { | |
25 | struct for_each | |
26 | { | |
27 | template <typename Sig> | |
28 | struct result; | |
29 | ||
30 | template<typename This, class R, class F> | |
31 | struct result<This(R&, F)> | |
32 | : result<This(R&, F const &)> | |
33 | {}; | |
34 | ||
35 | template<typename This, class R, class F> | |
36 | struct result<This(R&, F &)> | |
37 | { | |
38 | typedef F type; | |
39 | }; | |
40 | ||
41 | template<class R, class F> | |
42 | F const operator()(R& r, F const& fn) const | |
43 | { | |
44 | return std::for_each(detail::begin_(r), detail::end_(r), fn); | |
45 | } | |
46 | }; | |
47 | ||
48 | struct accumulate | |
49 | { | |
50 | template <typename Sig> | |
51 | struct result; | |
52 | ||
53 | template<typename This, class R, class I> | |
54 | struct result<This(R&, I)> | |
55 | : result<This(R&, I const &)> | |
56 | {}; | |
57 | ||
58 | template<typename This, class R, class I> | |
59 | struct result<This(R&, I &)> | |
60 | { | |
61 | typedef I type; | |
62 | }; | |
63 | ||
64 | template<typename This, class R, class I, class C> | |
65 | struct result<This(R&, I, C)> | |
66 | : result<This(R&, I const &, C)> | |
67 | {}; | |
68 | ||
69 | template<typename This, class R, class I, class C> | |
70 | struct result<This(R&, I &, C)> | |
71 | { | |
72 | typedef I type; | |
73 | }; | |
74 | ||
75 | template<class R, class I> | |
76 | I | |
77 | operator()(R& r, I i) const | |
78 | { | |
79 | return std::accumulate(detail::begin_(r), detail::end_(r), i); | |
80 | } | |
81 | ||
82 | template<class R, class I, class C> | |
83 | I | |
84 | operator()(R& r, I i, C c) const | |
85 | { | |
86 | return std::accumulate(detail::begin_(r), detail::end_(r), i, c); | |
87 | } | |
88 | }; | |
89 | } | |
90 | ||
91 | BOOST_PHOENIX_ADAPT_CALLABLE(for_each, impl::for_each, 2) | |
92 | BOOST_PHOENIX_ADAPT_CALLABLE(accumulate, impl::accumulate, 2) | |
93 | BOOST_PHOENIX_ADAPT_CALLABLE(accumulate, impl::accumulate, 3) | |
94 | ||
95 | }} | |
96 | ||
97 | #endif |