1 // (C) Copyright Jeremy Siek 2002.
2 // Distributed under the Boost Software License, Version 1.0. (See
3 // accompanying file LICENSE_1_0.txt or copy at
4 // http://www.boost.org/LICENSE_1_0.txt)
5 
6 #include <boost/iterator/iterator_concepts.hpp>
7 #include <boost/iterator/iterator_categories.hpp>
8 #include <boost/operators.hpp>
9 
10 #include <iterator>
11 #include <cstddef>
12 
13 struct new_random_access
14   : std::random_access_iterator_tag
15   , boost::random_access_traversal_tag
16 {};
17 
18 struct new_iterator
19 {
20   typedef new_random_access iterator_category;
21   typedef int value_type;
22   typedef std::ptrdiff_t difference_type;
23   typedef int* pointer;
24   typedef int& reference;
25 
operator *new_iterator26   int& operator*() const { return *m_x; }
operator ++new_iterator27   new_iterator& operator++() { return *this; }
operator ++new_iterator28   new_iterator operator++(int) { return *this; }
operator --new_iterator29   new_iterator& operator--() { return *this; }
operator --new_iterator30   new_iterator operator--(int) { return *this; }
operator +=new_iterator31   new_iterator& operator+=(std::ptrdiff_t) { return *this; }
operator +new_iterator32   new_iterator operator+(std::ptrdiff_t) { return *this; }
operator -=new_iterator33   new_iterator& operator-=(std::ptrdiff_t) { return *this; }
operator -new_iterator34   std::ptrdiff_t operator-(const new_iterator&) const { return 0; }
operator -new_iterator35   new_iterator operator-(std::ptrdiff_t) const { return *this; }
operator ==new_iterator36   bool operator==(const new_iterator&) const { return false; }
operator !=new_iterator37   bool operator!=(const new_iterator&) const { return false; }
operator <new_iterator38   bool operator<(const new_iterator&) const { return false; }
39   int* m_x;
40 };
operator +(std::ptrdiff_t,new_iterator x)41 new_iterator operator+(std::ptrdiff_t, new_iterator x) { return x; }
42 
43 struct old_iterator
44 {
45   typedef std::random_access_iterator_tag iterator_category;
46   typedef int value_type;
47   typedef std::ptrdiff_t difference_type;
48   typedef int* pointer;
49   typedef int& reference;
50 
operator *old_iterator51   int& operator*() const { return *m_x; }
operator ++old_iterator52   old_iterator& operator++() { return *this; }
operator ++old_iterator53   old_iterator operator++(int) { return *this; }
operator --old_iterator54   old_iterator& operator--() { return *this; }
operator --old_iterator55   old_iterator operator--(int) { return *this; }
operator +=old_iterator56   old_iterator& operator+=(std::ptrdiff_t) { return *this; }
operator +old_iterator57   old_iterator operator+(std::ptrdiff_t) { return *this; }
operator -=old_iterator58   old_iterator& operator-=(std::ptrdiff_t) { return *this; }
operator -old_iterator59   old_iterator operator-(std::ptrdiff_t) const { return *this; }
operator -old_iterator60   std::ptrdiff_t operator-(const old_iterator&) const { return 0; }
operator ==old_iterator61   bool operator==(const old_iterator&) const { return false; }
operator !=old_iterator62   bool operator!=(const old_iterator&) const { return false; }
operator <old_iterator63   bool operator<(const old_iterator&) const { return false; }
64   int* m_x;
65 };
operator +(std::ptrdiff_t,old_iterator x)66 old_iterator operator+(std::ptrdiff_t, old_iterator x) { return x; }
67 
68 int
main()69 main()
70 {
71   boost::iterator_traversal<new_iterator>::type tc;
72   boost::random_access_traversal_tag derived = tc;
73   (void)derived;
74 
75   boost::function_requires<
76     boost_concepts::WritableIteratorConcept<int*> >();
77   boost::function_requires<
78     boost_concepts::LvalueIteratorConcept<int*> >();
79   boost::function_requires<
80     boost_concepts::RandomAccessTraversalConcept<int*> >();
81 
82   boost::function_requires<
83     boost_concepts::ReadableIteratorConcept<const int*> >();
84   boost::function_requires<
85     boost_concepts::LvalueIteratorConcept<const int*> >();
86   boost::function_requires<
87     boost_concepts::RandomAccessTraversalConcept<const int*> >();
88 
89   boost::function_requires<
90     boost_concepts::WritableIteratorConcept<new_iterator> >();
91   boost::function_requires<
92     boost_concepts::LvalueIteratorConcept<new_iterator> >();
93   boost::function_requires<
94     boost_concepts::RandomAccessTraversalConcept<new_iterator> >();
95 
96   boost::function_requires<
97     boost_concepts::WritableIteratorConcept<old_iterator> >();
98   boost::function_requires<
99     boost_concepts::LvalueIteratorConcept<old_iterator> >();
100   boost::function_requires<
101     boost_concepts::RandomAccessTraversalConcept<old_iterator> >();
102 
103   boost::function_requires<
104     boost_concepts::InteroperableIteratorConcept<int*, int const*> >();
105 
106   return 0;
107 }
108