[857] | 1 |
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| 2 | #ifndef BOOST_MPL_AUX_JOINT_ITER_HPP_INCLUDED
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| 3 | #define BOOST_MPL_AUX_JOINT_ITER_HPP_INCLUDED
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| 4 |
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| 5 | // Copyright Aleksey Gurtovoy 2000-2004
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| 6 | //
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| 7 | // Distributed under the Boost Software License, Version 1.0.
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| 8 | // (See accompanying file LICENSE_1_0.txt or copy at
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| 9 | // http://www.boost.org/LICENSE_1_0.txt)
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| 10 | //
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| 11 | // See http://www.boost.org/libs/mpl for documentation.
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| 12 |
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| 13 | // $Source: /cvsroot/boost/boost/boost/mpl/aux_/joint_iter.hpp,v $
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| 14 | // $Date: 2004/10/01 16:29:34 $
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| 15 | // $Revision: 1.6 $
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| 16 |
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| 17 | #include <boost/mpl/next_prior.hpp>
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| 18 | #include <boost/mpl/deref.hpp>
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| 19 | #include <boost/mpl/iterator_tags.hpp>
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| 20 | #include <boost/mpl/aux_/lambda_spec.hpp>
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| 21 | #include <boost/mpl/aux_/config/ctps.hpp>
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| 22 |
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| 23 | #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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| 24 | # include <boost/type_traits/is_same.hpp>
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| 25 | #endif
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| 26 |
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| 27 | namespace boost { namespace mpl {
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| 28 |
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| 29 | #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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| 30 |
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| 31 | template<
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| 32 | typename Iterator1
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| 33 | , typename LastIterator1
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| 34 | , typename Iterator2
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| 35 | >
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| 36 | struct joint_iter
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| 37 | {
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| 38 | typedef Iterator1 base;
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| 39 | typedef forward_iterator_tag category;
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| 40 | };
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| 41 |
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| 42 | template<
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| 43 | typename LastIterator1
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| 44 | , typename Iterator2
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| 45 | >
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| 46 | struct joint_iter<LastIterator1,LastIterator1,Iterator2>
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| 47 | {
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| 48 | typedef Iterator2 base;
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| 49 | typedef forward_iterator_tag category;
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| 50 | };
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| 51 |
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| 52 |
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| 53 | template< typename I1, typename L1, typename I2 >
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| 54 | struct deref< joint_iter<I1,L1,I2> >
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| 55 | {
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| 56 | typedef typename joint_iter<I1,L1,I2>::base base_;
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| 57 | typedef typename deref<base_>::type type;
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| 58 | };
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| 59 |
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| 60 | template< typename I1, typename L1, typename I2 >
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| 61 | struct next< joint_iter<I1,L1,I2> >
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| 62 | {
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| 63 | typedef joint_iter< typename mpl::next<I1>::type,L1,I2 > type;
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| 64 | };
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| 65 |
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| 66 | template< typename L1, typename I2 >
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| 67 | struct next< joint_iter<L1,L1,I2> >
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| 68 | {
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| 69 | typedef joint_iter< L1,L1,typename mpl::next<I2>::type > type;
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| 70 | };
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| 71 |
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| 72 | #else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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| 73 |
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| 74 | template<
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| 75 | typename Iterator1
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| 76 | , typename LastIterator1
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| 77 | , typename Iterator2
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| 78 | >
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| 79 | struct joint_iter;
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| 80 |
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| 81 | template< bool > struct joint_iter_impl
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| 82 | {
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| 83 | template< typename I1, typename L1, typename I2 > struct result_
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| 84 | {
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| 85 | typedef I1 base;
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| 86 | typedef forward_iterator_tag category;
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| 87 | typedef joint_iter< typename mpl::next<I1>::type,L1,I2 > next;
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| 88 | typedef typename deref<I1>::type type;
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| 89 | };
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| 90 | };
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| 91 |
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| 92 | template<> struct joint_iter_impl<true>
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| 93 | {
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| 94 | template< typename I1, typename L1, typename I2 > struct result_
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| 95 | {
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| 96 | typedef I2 base;
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| 97 | typedef forward_iterator_tag category;
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| 98 | typedef joint_iter< L1,L1,typename mpl::next<I2>::type > next;
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| 99 | typedef typename deref<I2>::type type;
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| 100 | };
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| 101 | };
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| 102 |
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| 103 | template<
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| 104 | typename Iterator1
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| 105 | , typename LastIterator1
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| 106 | , typename Iterator2
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| 107 | >
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| 108 | struct joint_iter
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| 109 | : joint_iter_impl< is_same<Iterator1,LastIterator1>::value >
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| 110 | ::template result_<Iterator1,LastIterator1,Iterator2>
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| 111 | {
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| 112 | };
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| 113 |
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| 114 | #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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| 115 |
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| 116 | BOOST_MPL_AUX_PASS_THROUGH_LAMBDA_SPEC(3, joint_iter)
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| 117 |
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| 118 | }}
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| 119 |
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| 120 | #endif // BOOST_MPL_AUX_JOINT_ITER_HPP_INCLUDED
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