1/*
2Copyright 2017 Glen Joseph Fernandes
3(glenjofe@gmail.com)
4
5Distributed under the Boost Software License, Version 1.0.
6(http://www.boost.org/LICENSE_1_0.txt)
7*/
8#include <boost/core/pointer_traits.hpp>
9#include <boost/core/lightweight_test_trait.hpp>
10#include <boost/core/detail/is_same.hpp>
11
12template<class T>
13struct P { };
14
15template<class T>
16struct E {
17 typedef long difference_type;
18};
19
20int main()
21{
22 BOOST_TEST_TRAIT_TRUE((boost::core::detail::is_same<std::ptrdiff_t,
23 boost::pointer_traits<int*>::difference_type>));
24 BOOST_TEST_TRAIT_TRUE((boost::core::detail::is_same<std::ptrdiff_t,
25 boost::pointer_traits<P<int> >::difference_type>));
26 BOOST_TEST_TRAIT_TRUE((boost::core::detail::is_same<long,
27 boost::pointer_traits<E<int> >::difference_type>));
28 BOOST_TEST_TRAIT_TRUE((boost::core::detail::is_same<std::ptrdiff_t,
29 boost::pointer_traits<void*>::difference_type>));
30 BOOST_TEST_TRAIT_TRUE((boost::core::detail::is_same<std::ptrdiff_t,
31 boost::pointer_traits<P<void> >::difference_type>));
32 BOOST_TEST_TRAIT_TRUE((boost::core::detail::is_same<long,
33 boost::pointer_traits<E<void> >::difference_type>));
34 BOOST_TEST_TRAIT_TRUE((boost::core::detail::is_same<std::ptrdiff_t,
35 boost::pointer_traits<const int*>::difference_type>));
36 BOOST_TEST_TRAIT_TRUE((boost::core::detail::is_same<std::ptrdiff_t,
37 boost::pointer_traits<P<const int> >::difference_type>));
38 BOOST_TEST_TRAIT_TRUE((boost::core::detail::is_same<long,
39 boost::pointer_traits<E<const int> >::difference_type>));
40 return boost::report_errors();
41}
42

source code of boost/libs/core/test/pointer_traits_difference_type_test.cpp