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

   1
   2 //  Copyright 2015 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/algorithm.hpp>
  11 #include <boost/mp11/list.hpp>
  12 #include <boost/mp11/integral.hpp>
  13 #include <boost/core/lightweight_test_trait.hpp>
  14 #include <type_traits>
  15 #include <tuple>
  16 #include <utility>
  17
  18 struct X1 {};
  19 struct X2 {};
  20 struct X3 {};
  21 struct X4 {};
  22 struct X5 {};
  23
  24 int main()
  25 {
  26     using boost::mp11::mp_list;
  27     using boost::mp11::mp_at;
  28     using boost::mp11::mp_at_c;
  29     using boost::mp11::mp_size_t;
  30
  31     {
  32         using L1 = mp_list<X1, X2, X3, X4, X5>;
  33
  34         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at_c<L1, 0>, X1>));
  35         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at_c<L1, 1>, X2>));
  36         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at_c<L1, 2>, X3>));
  37         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at_c<L1, 3>, X4>));
  38         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at_c<L1, 4>, X5>));
  39
  40         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at<L1, mp_size_t<0>>, X1>));
  41         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at<L1, mp_size_t<1>>, X2>));
  42         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at<L1, mp_size_t<2>>, X3>));
  43         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at<L1, mp_size_t<3>>, X4>));
  44         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at<L1, mp_size_t<4>>, X5>));
  45     }
  46
  47     {
  48         using L1 = std::tuple<X1, X2, X3, X4, X5>;
  49
  50         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at_c<L1, 0>, X1>));
  51         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at_c<L1, 1>, X2>));
  52         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at_c<L1, 2>, X3>));
  53         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at_c<L1, 3>, X4>));
  54         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at_c<L1, 4>, X5>));
  55
  56         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at<L1, mp_size_t<0>>, X1>));
  57         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at<L1, mp_size_t<1>>, X2>));
  58         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at<L1, mp_size_t<2>>, X3>));
  59         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at<L1, mp_size_t<3>>, X4>));
  60         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at<L1, mp_size_t<4>>, X5>));
  61     }
  62
  63     {
  64         using L1 = std::pair<X1, X2>;
  65
  66         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at_c<L1, 0>, X1>));
  67         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at_c<L1, 1>, X2>));
  68
  69         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at<L1, mp_size_t<0>>, X1>));
  70         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_at<L1, mp_size_t<1>>, X2>));
  71     }
  72
  73     return boost::report_errors();
  74 }