ceph/src/boost/libs/core/test/pointer_traits_difference_type_test.cpp

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