ceph/src/boost/libs/mp11/test/mp_replace_second.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/algorithm.hpp>
  11 #include <boost/mp11/list.hpp>
  12 #include <boost/core/lightweight_test_trait.hpp>
  13 #include <type_traits>
  14 #include <tuple>
  15 #include <utility>
  16
  17 struct X1 {};
  18 struct X2 {};
  19 struct X3 {};
  20 struct X4 {};
  21
  22 int main()
  23 {
  24     using boost::mp11::mp_list;
  25     using boost::mp11::mp_replace_second;
  26
  27     {
  28         using L2 = mp_list<X1, X2>;
  29
  30         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_second<L2, void>, mp_list<X1, void>>));
  31
  32         using L3 = mp_list<X1, X2, X3>;
  33
  34         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_second<L3, void>, mp_list<X1, void, X3>>));
  35
  36         using L4 = mp_list<X1, X2, X3, X4>;
  37
  38         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_second<L4, void>, mp_list<X1, void, X3, X4>>));
  39     }
  40
  41     {
  42         using L2 = std::tuple<X1, X2>;
  43
  44         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_second<L2, void>, std::tuple<X1, void>>));
  45
  46         using L3 = std::tuple<X1, X2, X3>;
  47
  48         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_second<L3, void>, std::tuple<X1, void, X3>>));
  49
  50         using L4 = std::tuple<X1, X2, X3, X4>;
  51
  52         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_second<L4, void>, std::tuple<X1, void, X3, X4>>));
  53     }
  54
  55     {
  56         using L2 = std::pair<X1, X2>;
  57
  58         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_second<L2, void>, std::pair<X1, void>>));
  59     }
  60
  61     return boost::report_errors();
  62 }