ceph/src/boost/libs/mp11/test/mp_replace_third.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_third;
  26
  27     {
  28         using L3 = mp_list<X1, X2, X3>;
  29
  30         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_third<L3, void>, mp_list<X1, X2, void>>));
  31
  32         using L4 = mp_list<X1, X2, X3, X4>;
  33
  34         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_third<L4, void>, mp_list<X1, X2, void, X4>>));
  35     }
  36
  37     {
  38         using L3 = std::tuple<X1, X2, X3>;
  39
  40         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_third<L3, void>, std::tuple<X1, X2, void>>));
  41
  42         using L4 = std::tuple<X1, X2, X3, X4>;
  43
  44         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_third<L4, void>, std::tuple<X1, X2, void, X4>>));
  45     }
  46
  47     return boost::report_errors();
  48 }