| 1 | /*============================================================================= |
|---|---|
| 2 | Copyright (c) 2001-2011 Joel de Guzman |
| 3 | Copyright (c) 2005 Eric Niebler |
| 4 | |
| 5 | Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 6 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 7 | ==============================================================================*/ |
| 8 | #if !defined(FUSION_BEGIN_IMPL_07172005_0824) |
| 9 | #define FUSION_BEGIN_IMPL_07172005_0824 |
| 10 | |
| 11 | #include <boost/fusion/support/config.hpp> |
| 12 | #include <boost/mpl/if.hpp> |
| 13 | #include <boost/type_traits/is_const.hpp> |
| 14 | |
| 15 | namespace boost { namespace fusion |
| 16 | { |
| 17 | struct nil_; |
| 18 | |
| 19 | struct cons_tag; |
| 20 | |
| 21 | template <typename Car, typename Cdr> |
| 22 | struct cons; |
| 23 | |
| 24 | template <typename Cons> |
| 25 | struct cons_iterator; |
| 26 | |
| 27 | namespace extension |
| 28 | { |
| 29 | template <typename Tag> |
| 30 | struct begin_impl; |
| 31 | |
| 32 | template <> |
| 33 | struct begin_impl<cons_tag> |
| 34 | { |
| 35 | template <typename Sequence> |
| 36 | struct apply |
| 37 | { |
| 38 | typedef cons_iterator<Sequence> type; |
| 39 | |
| 40 | BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED |
| 41 | static type |
| 42 | call(Sequence& t) |
| 43 | { |
| 44 | return type(t); |
| 45 | } |
| 46 | }; |
| 47 | }; |
| 48 | } |
| 49 | }} |
| 50 | |
| 51 | #endif |
| 52 |