ceph/src/boost/libs/mp11/test/mp_plus.cpp

   1
   2 // Copyright 2015-2017 Peter Dimov.
   3 //
   4 // Distributed under the Boost Software License, Version 1.0.
   5 //
   6 // See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt
   8
   9
  10 #include <boost/mp11/function.hpp>
  11 #include <boost/core/lightweight_test_trait.hpp>
  12 #include <type_traits>
  13
  14 template<class T, T N> using integral = std::integral_constant<T, N>;
  15
  16 int main()
  17 {
  18     using boost::mp11::mp_plus;
  19
  20     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_plus<>, integral<int, 0>>));
  21
  22     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_plus<integral<char, 1>>, integral<int, 1>>));
  23     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_plus<integral<short, 2>>, integral<int, 2>>));
  24     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_plus<integral<int, 3>>, integral<int, 3>>));
  25     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_plus<integral<unsigned, 4>>, integral<unsigned, 4>>));
  26
  27     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_plus<integral<char, 1>, integral<char, 2>>, integral<int, 3>>));
  28     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_plus<integral<short, 1>, integral<short, 2>, integral<short, 3>>, integral<int, 6>>));
  29     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_plus<integral<int, 1>, integral<int, 2>, integral<int, 3>, integral<long, 4>>, integral<long, 10>>));
  30
  31     return boost::report_errors();
  32 }