ceph/src/boost/libs/mp11/test/mp_replace_front.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_front;
  26     using boost::mp11::mp_replace_first;
  27
  28     {
  29         using L1 = mp_list<X1>;
  30
  31         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L1, void>, mp_list<void>>));
  32         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L1, void>, mp_list<void>>));
  33
  34         using L2 = mp_list<X1, X2>;
  35
  36         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L2, void>, mp_list<void, X2>>));
  37         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L2, void>, mp_list<void, X2>>));
  38
  39         using L3 = mp_list<X1, X2, X3>;
  40
  41         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L3, void>, mp_list<void, X2, X3>>));
  42         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L3, void>, mp_list<void, X2, X3>>));
  43
  44         using L4 = mp_list<X1, X2, X3, X4>;
  45
  46         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L4, void>, mp_list<void, X2, X3, X4>>));
  47         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L4, void>, mp_list<void, X2, X3, X4>>));
  48     }
  49
  50     {
  51         using L1 = std::tuple<X1>;
  52
  53         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L1, void>, std::tuple<void>>));
  54         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L1, void>, std::tuple<void>>));
  55
  56         using L2 = std::tuple<X1, X2>;
  57
  58         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L2, void>, std::tuple<void, X2>>));
  59         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L2, void>, std::tuple<void, X2>>));
  60
  61         using L3 = std::tuple<X1, X2, X3>;
  62
  63         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L3, void>, std::tuple<void, X2, X3>>));
  64         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L3, void>, std::tuple<void, X2, X3>>));
  65
  66         using L4 = std::tuple<X1, X2, X3, X4>;
  67
  68         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L4, void>, std::tuple<void, X2, X3, X4>>));
  69         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L4, void>, std::tuple<void, X2, X3, X4>>));
  70     }
  71
  72     {
  73         using L2 = std::pair<X1, X2>;
  74
  75         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_front<L2, void>, std::pair<void, X2>>));
  76         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_first<L2, void>, std::pair<void, X2>>));
  77     }
  78
  79     return boost::report_errors();
  80 }