projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /*============================================================================= |
| 2 | Copyright (c) 2007 Tobias Schwinger | |
| 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_REPETITIVE_VIEW_NEXT_IMPL_HPP_INCLUDED) | |
| 9 | #define BOOST_FUSION_REPETITIVE_VIEW_NEXT_IMPL_HPP_INCLUDED | |
| 10 | ||
| 11 | #include <boost/fusion/support/config.hpp> | |
| 12 | #include <boost/fusion/iterator/next.hpp> | |
| 13 | #include <boost/fusion/iterator/equal_to.hpp> | |
| 14 | ||
| 15 | namespace boost { namespace fusion | |
| 16 | { | |
| 17 | struct repetitive_view_iterator_tag; | |
| 18 | ||
| 19 | template <typename Sequence, typename Pos> | |
| 20 | struct repetitive_view_iterator; | |
| 21 | ||
| 22 | namespace extension | |
| 23 | { | |
| 24 | template <typename Tag> | |
| 25 | struct next_impl; | |
| 26 | ||
| 27 | template <> | |
| 28 | struct next_impl<repetitive_view_iterator_tag> | |
| 29 | { | |
| 30 | template<typename Iterator, | |
| 31 | bool Last = result_of::equal_to<typename Iterator::end_type, | |
| 32 | typename result_of::next< | |
| 33 | typename Iterator::pos_type | |
| 34 | >::type>::value > | |
| 35 | struct apply_nonempty // <Iterator,false> | |
| 36 | { | |
| 37 | // advanvce to next position | |
| 38 | ||
| 39 | typedef repetitive_view_iterator< | |
| 40 | typename Iterator::sequence_type, | |
| 41 | typename result_of::next<typename Iterator::pos_type>::type | |
| 42 | > | |
| 43 | type; | |
| 44 | ||
| 45 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
| 46 | static type call(Iterator const& i) | |
| 47 | { | |
| 48 | return type(i.seq, next(i.pos)); | |
| 49 | } | |
| 50 | }; | |
| 51 | template <typename Iterator> | |
| 52 | struct apply_nonempty<Iterator,true> | |
| 53 | { | |
| 54 | // reset to beginning | |
| 55 | ||
| 56 | typedef repetitive_view_iterator< | |
| 57 | typename Iterator::sequence_type, | |
| 58 | typename Iterator::first_type | |
| 59 | > | |
| 60 | type; | |
| 61 | ||
| 62 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
| 63 | static type call(Iterator const& i) | |
| 64 | { | |
| 65 | return type(i.seq); | |
| 66 | } | |
| 67 | }; | |
| 68 | ||
| 69 | template <typename Iterator, | |
| 70 | bool Empty = result_of::equal_to<typename Iterator::end_type, | |
| 71 | typename Iterator::pos_type>::value > | |
| 72 | struct apply // <Iterator,false> | |
| 73 | : apply_nonempty<Iterator> | |
| 74 | { }; | |
| 75 | ||
| 76 | template <typename Iterator> | |
| 77 | struct apply<Iterator,true> | |
| 78 | { | |
| 79 | // eps^n = eps | |
| 80 | ||
| 81 | typedef Iterator type; | |
| 82 | ||
| 83 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED | |
| 84 | static type call(Iterator const& i) | |
| 85 | { | |
| 86 | return type(i); | |
| 87 | } | |
| 88 | }; | |
| 89 | }; | |
| 90 | } | |
| 91 | }} | |
| 92 | ||
| 93 | #endif | |
| 94 |