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

   1
   2 // Copyright 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 #include <boost/mp11/detail/config.hpp>
  10
  11 #if BOOST_MP11_MSVC
  12 # pragma warning( disable: 4503 ) // decorated name length exceeded
  13 #endif
  14
  15 #include <boost/mp11/function.hpp>
  16 #include <boost/mp11/algorithm.hpp>
  17 #include <boost/mp11/list.hpp>
  18 #include <boost/core/lightweight_test_trait.hpp>
  19 #include <type_traits>
  20
  21 int main()
  22 {
  23     using boost::mp11::mp_same;
  24     using boost::mp11::mp_true;
  25     using boost::mp11::mp_false;
  26
  27     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_same<>, mp_true>));
  28     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_same<void>, mp_true>));
  29     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_same<void, void>, mp_true>));
  30     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_same<void, void, void>, mp_true>));
  31     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_same<void, void, void, void>, mp_true>));
  32     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_same<void, void, void, void, void>, mp_true>));
  33
  34     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_same<void, int>, mp_false>));
  35     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_same<void, void, int>, mp_false>));
  36     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_same<void, void, void, int>, mp_false>));
  37     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_same<void, void, void, void, int>, mp_false>));
  38
  39     using boost::mp11::mp_repeat_c;
  40     using boost::mp11::mp_list;
  41     using boost::mp11::mp_apply;
  42
  43     int const N = 1024;
  44
  45     using L = mp_repeat_c<mp_list<void>, N>;
  46     using R = mp_apply<mp_same, L>;
  47
  48     BOOST_TEST_TRAIT_TRUE((std::is_same<R, mp_true>));
  49
  50     return boost::report_errors();
  51 }