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/Src/Dependencies/Boost/boost/mpl/set/aux_/iterator.hpp

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 1
 2#ifndef BOOST_MPL_SET_AUX_ITERATOR_HPP_INCLUDED
 3#define BOOST_MPL_SET_AUX_ITERATOR_HPP_INCLUDED
 4
 5// Copyright Aleksey Gurtovoy 2003-2007
 6// Copyright David Abrahams 2003-2004
 7//
 8// Distributed under the Boost Software License, Version 1.0. 
 9// (See accompanying file LICENSE_1_0.txt or copy at 
10// http://www.boost.org/LICENSE_1_0.txt)
11//
12// See http://www.boost.org/libs/mpl for documentation.
13
14// $Id: iterator.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
15// $Date: 2008-10-11 17:19:02 +1100 (Sat, 11 Oct 2008) $
16// $Revision: 49267 $
17
18#include <boost/mpl/set/aux_/set0.hpp>
19#include <boost/mpl/has_key.hpp>
20#include <boost/mpl/iterator_tags.hpp>
21#include <boost/mpl/next.hpp>
22#include <boost/mpl/eval_if.hpp>
23#include <boost/mpl/if.hpp>
24#include <boost/mpl/identity.hpp>
25#include <boost/mpl/aux_/config/ctps.hpp>
26
27namespace boost { namespace mpl {
28
29// used by 's_iter_get'
30template< typename Set, typename Tail > struct s_iter;
31
32template< typename Set, typename Tail > struct s_iter_get
33    : eval_if< 
34          has_key< Set,typename Tail::item_type_ >
35        , identity< s_iter<Set,Tail> >
36        , next< s_iter<Set,Tail> >
37        >
38{
39};
40
41template< typename Set, typename Tail > struct s_iter_impl
42{
43    typedef Tail                        tail_;
44    typedef forward_iterator_tag        category;
45    typedef typename Tail::item_type_   type;
46
47#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
48    typedef typename s_iter_get< Set,typename Tail::base >::type next;
49#endif
50};
51
52#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
53
54template< typename Set, typename Tail > 
55struct next< s_iter<Set,Tail> >
56    : s_iter_get< Set,typename Tail::base >
57{
58};
59
60template< typename Set > 
61struct next< s_iter<Set,set0<> > >
62{
63    typedef s_iter<Set,set0<> > type;
64};
65
66template< typename Set, typename Tail > struct s_iter
67    : s_iter_impl<Set,Tail>
68{
69};
70
71template< typename Set > struct s_iter<Set, set0<> >
72{
73    typedef forward_iterator_tag category;
74};
75
76#else
77
78template< typename Set >
79struct s_end_iter
80{
81    typedef forward_iterator_tag    category;
82    typedef s_iter<Set,set0<> >     next;
83};
84
85template< typename Set, typename Tail > struct s_iter
86    : if_< 
87          is_same< Tail,set0<> >
88        , s_end_iter<Set>
89        , s_iter_impl<Set,Tail>
90        >::type
91{
92};
93
94#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
95
96}}
97
98#endif // BOOST_MPL_SET_AUX_ITERATOR_HPP_INCLUDED