[857] | 1 |
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| 2 | #ifndef BOOST_MPL_SET_AUX_ITERATOR_HPP_INCLUDED
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| 3 | #define BOOST_MPL_SET_AUX_ITERATOR_HPP_INCLUDED
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| 4 |
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| 5 | // Copyright Aleksey Gurtovoy 2003-2004
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| 6 | // Copyright David Abrahams 2003-2004
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| 7 | //
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| 8 | // Distributed under the Boost Software License, Version 1.0.
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| 9 | // (See accompanying file LICENSE_1_0.txt or copy at
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| 10 | // http://www.boost.org/LICENSE_1_0.txt)
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| 11 | //
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| 12 | // See http://www.boost.org/libs/mpl for documentation.
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| 13 |
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| 14 | // $Source: /cvsroot/boost/boost/boost/mpl/set/aux_/iterator.hpp,v $
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| 15 | // $Date: 2005/06/18 22:03:09 $
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| 16 | // $Revision: 1.4 $
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| 17 |
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| 18 | #include <boost/mpl/set/aux_/set0.hpp>
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| 19 | #include <boost/mpl/has_key.hpp>
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| 20 | #include <boost/mpl/iterator_tags.hpp>
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| 21 | #include <boost/mpl/next.hpp>
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| 22 | #include <boost/mpl/eval_if.hpp>
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| 23 | #include <boost/mpl/if.hpp>
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| 24 | #include <boost/mpl/identity.hpp>
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| 25 | #include <boost/mpl/aux_/config/ctps.hpp>
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| 26 |
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| 27 | namespace boost { namespace mpl {
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| 28 |
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| 29 | // used by 's_iter_impl'
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| 30 | template< typename Set, typename Tail > struct s_iter;
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| 31 |
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| 32 | template< typename Set, typename Tail > struct s_iter_impl
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| 33 | {
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| 34 | typedef Tail tail_;
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| 35 | typedef forward_iterator_tag category;
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| 36 | typedef typename Tail::item_::type type;
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| 37 |
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| 38 | #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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| 39 | typedef typename eval_if<
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| 40 | has_key< Set,typename Tail::next_::type >
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| 41 | , identity< s_iter<Set,typename Tail::next_> >
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| 42 | , next< s_iter<Set,typename Tail::next_> >
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| 43 | >::type next;
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| 44 | #endif
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| 45 | };
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| 46 |
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| 47 | #if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
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| 48 |
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| 49 | template< typename Set, typename Tail >
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| 50 | struct next< s_iter<Set,Tail> >
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| 51 | : eval_if<
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| 52 | has_key< Set,typename Tail::next_::type >
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| 53 | , identity< s_iter<Set,typename Tail::next_> >
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| 54 | , next< s_iter<Set,typename Tail::next_> >
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| 55 | >
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| 56 | {
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| 57 | };
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| 58 |
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| 59 | template< typename Set >
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| 60 | struct next< s_iter<Set,set0<> > >
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| 61 | {
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| 62 | typedef s_iter<Set,set0<> > type;
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| 63 | };
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| 64 |
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| 65 | template< typename Set, typename Tail > struct s_iter
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| 66 | : s_iter_impl<Set,Tail>
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| 67 | {
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| 68 | };
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| 69 |
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| 70 | template< typename Set > struct s_iter<Set, set0<> >
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| 71 | {
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| 72 | typedef forward_iterator_tag category;
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| 73 | };
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| 74 |
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| 75 | #else
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| 76 |
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| 77 | template< typename Set >
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| 78 | struct s_end_iter
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| 79 | {
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| 80 | typedef forward_iterator_tag category;
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| 81 | typedef s_iter<Set,set0<> > next;
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| 82 | };
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| 83 |
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| 84 | template< typename Set, typename Tail > struct s_iter
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| 85 | : if_<
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| 86 | is_same< Tail,set0<> >
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| 87 | , s_end_iter<Set>
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| 88 | , s_iter_impl<Set,Tail>
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| 89 | >::type
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| 90 | {
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| 91 | };
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| 92 |
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| 93 | #endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
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| 94 |
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| 95 | }}
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| 96 |
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| 97 | #endif // BOOST_MPL_SET_AUX_ITERATOR_HPP_INCLUDED
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