| Jeff Thompson | ef2d5a4 | 2013-08-22 19:09:24 -0700 | [diff] [blame] | 1 | |
| 2 | #ifndef BOOST_MPL_FOR_EACH_HPP_INCLUDED |
| 3 | #define BOOST_MPL_FOR_EACH_HPP_INCLUDED |
| 4 | |
| 5 | // Copyright Aleksey Gurtovoy 2000-2008 |
| 6 | // |
| 7 | // Distributed under the Boost Software License, Version 1.0. |
| 8 | // (See accompanying file LICENSE_1_0.txt or copy at |
| 9 | // http://www.boost.org/LICENSE_1_0.txt) |
| 10 | // |
| 11 | // See http://www.boost.org/libs/mpl for documentation. |
| 12 | |
| 13 | // $Id: for_each.hpp 55648 2009-08-18 05:16:53Z agurtovoy $ |
| 14 | // $Date: 2009-08-17 22:16:53 -0700 (Mon, 17 Aug 2009) $ |
| 15 | // $Revision: 55648 $ |
| 16 | |
| 17 | #include <ndnboost/mpl/is_sequence.hpp> |
| 18 | #include <ndnboost/mpl/begin_end.hpp> |
| 19 | #include <ndnboost/mpl/apply.hpp> |
| 20 | #include <ndnboost/mpl/bool.hpp> |
| 21 | #include <ndnboost/mpl/next_prior.hpp> |
| 22 | #include <ndnboost/mpl/deref.hpp> |
| 23 | #include <ndnboost/mpl/identity.hpp> |
| 24 | #include <ndnboost/mpl/assert.hpp> |
| 25 | #include <ndnboost/mpl/aux_/unwrap.hpp> |
| 26 | |
| 27 | #include <ndnboost/type_traits/is_same.hpp> |
| 28 | #include <ndnboost/utility/value_init.hpp> |
| 29 | |
| 30 | namespace ndnboost { namespace mpl { |
| 31 | |
| 32 | namespace aux { |
| 33 | |
| 34 | template< bool done = true > |
| 35 | struct for_each_impl |
| 36 | { |
| 37 | template< |
| 38 | typename Iterator |
| 39 | , typename LastIterator |
| 40 | , typename TransformFunc |
| 41 | , typename F |
| 42 | > |
| 43 | static void execute( |
| 44 | Iterator* |
| 45 | , LastIterator* |
| 46 | , TransformFunc* |
| 47 | , F |
| 48 | ) |
| 49 | { |
| 50 | } |
| 51 | }; |
| 52 | |
| 53 | template<> |
| 54 | struct for_each_impl<false> |
| 55 | { |
| 56 | template< |
| 57 | typename Iterator |
| 58 | , typename LastIterator |
| 59 | , typename TransformFunc |
| 60 | , typename F |
| 61 | > |
| 62 | static void execute( |
| 63 | Iterator* |
| 64 | , LastIterator* |
| 65 | , TransformFunc* |
| 66 | , F f |
| 67 | ) |
| 68 | { |
| 69 | typedef typename deref<Iterator>::type item; |
| 70 | typedef typename apply1<TransformFunc,item>::type arg; |
| 71 | |
| 72 | // dwa 2002/9/10 -- make sure not to invoke undefined behavior |
| 73 | // when we pass arg. |
| 74 | value_initialized<arg> x; |
| 75 | aux::unwrap(f, 0)(ndnboost::get(x)); |
| 76 | |
| 77 | typedef typename mpl::next<Iterator>::type iter; |
| 78 | for_each_impl<ndnboost::is_same<iter,LastIterator>::value> |
| 79 | ::execute( static_cast<iter*>(0), static_cast<LastIterator*>(0), static_cast<TransformFunc*>(0), f); |
| 80 | } |
| 81 | }; |
| 82 | |
| 83 | } // namespace aux |
| 84 | |
| 85 | // agurt, 17/mar/02: pointer default parameters are necessary to workaround |
| 86 | // MSVC 6.5 function template signature's mangling bug |
| 87 | template< |
| 88 | typename Sequence |
| 89 | , typename TransformOp |
| 90 | , typename F |
| 91 | > |
| 92 | inline |
| 93 | void for_each(F f, Sequence* = 0, TransformOp* = 0) |
| 94 | { |
| 95 | BOOST_MPL_ASSERT(( is_sequence<Sequence> )); |
| 96 | |
| 97 | typedef typename begin<Sequence>::type first; |
| 98 | typedef typename end<Sequence>::type last; |
| 99 | |
| 100 | aux::for_each_impl< ndnboost::is_same<first,last>::value > |
| 101 | ::execute(static_cast<first*>(0), static_cast<last*>(0), static_cast<TransformOp*>(0), f); |
| 102 | } |
| 103 | |
| 104 | template< |
| 105 | typename Sequence |
| 106 | , typename F |
| 107 | > |
| 108 | inline |
| 109 | void for_each(F f, Sequence* = 0) |
| 110 | { |
| 111 | for_each<Sequence, identity<> >(f); |
| 112 | } |
| 113 | |
| 114 | }} |
| 115 | |
| 116 | #endif // BOOST_MPL_FOR_EACH_HPP_INCLUDED |