ceph/src/boost/libs/mp11/test/mp_replace_at_c.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 struct X5 {};
  22
  23 int main()
  24 {
  25     using boost::mp11::mp_list;
  26     using boost::mp11::mp_replace_at_c;
  27
  28     {
  29         using L = mp_list<X1, X2, X3, X4, X5>;
  30
  31         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 0, void>, mp_list<void, X2, X3, X4, X5>>));
  32         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 1, void>, mp_list<X1, void, X3, X4, X5>>));
  33         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 2, void>, mp_list<X1, X2, void, X4, X5>>));
  34         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 3, void>, mp_list<X1, X2, X3, void, X5>>));
  35         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 4, void>, mp_list<X1, X2, X3, X4, void>>));
  36     }
  37
  38     {
  39         using L = std::tuple<X1, X2, X3, X4, X5>;
  40
  41         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 0, void>, std::tuple<void, X2, X3, X4, X5>>));
  42         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 1, void>, std::tuple<X1, void, X3, X4, X5>>));
  43         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 2, void>, std::tuple<X1, X2, void, X4, X5>>));
  44         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 3, void>, std::tuple<X1, X2, X3, void, X5>>));
  45         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 4, void>, std::tuple<X1, X2, X3, X4, void>>));
  46     }
  47
  48     {
  49         using L = std::pair<X1, X2>;
  50
  51         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 0, void>, std::pair<void, X2>>));
  52         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at_c<L, 1, void>, std::pair<X1, void>>));
  53     }
  54
  55     return boost::report_errors();
  56 }