ceph/src/boost/libs/mp11/test/mp_assign.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/list.hpp>
  11 #include <boost/core/lightweight_test_trait.hpp>
  12 #include <type_traits>
  13 #include <tuple>
  14 #include <utility>
  15
  16 struct X1 {};
  17 struct X2 {};
  18 struct X3 {};
  19
  20 int main()
  21 {
  22     using boost::mp11::mp_list;
  23     using boost::mp11::mp_assign;
  24
  25     using L1 = mp_list<int, void(), float[]>;
  26
  27     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L1, mp_list<>>, mp_list<>>));
  28     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L1, mp_list<X1>>, mp_list<X1>>));
  29     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L1, mp_list<X1, X2>>, mp_list<X1, X2>>));
  30     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L1, mp_list<X1, X2, X3>>, mp_list<X1, X2, X3>>));
  31
  32     //
  33
  34     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L1, std::tuple<>>, mp_list<>>));
  35     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L1, std::tuple<X1>>, mp_list<X1>>));
  36     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L1, std::tuple<X1, X2>>, mp_list<X1, X2>>));
  37     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L1, std::tuple<X1, X2, X3>>, mp_list<X1, X2, X3>>));
  38
  39     //
  40
  41     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L1, std::pair<X1, X2>>, mp_list<X1, X2>>));
  42
  43     //
  44
  45     using L2 = std::tuple<int, char, float>;
  46
  47     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L2, mp_list<>>, std::tuple<>>));
  48     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L2, mp_list<X1>>, std::tuple<X1>>));
  49     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L2, mp_list<X1, X2>>, std::tuple<X1, X2>>));
  50     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L2, mp_list<X1, X2, X3>>, std::tuple<X1, X2, X3>>));
  51
  52     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L2, std::pair<X1, X2>>, std::tuple<X1, X2>>));
  53
  54     //
  55
  56     using L3 = std::pair<int, char>;
  57
  58     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L3, mp_list<X1, X2>>, std::pair<X1, X2>>));
  59     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_assign<L3, std::pair<X1, X2>>, std::pair<X1, X2>>));
  60
  61     //
  62
  63     return boost::report_errors();
  64 }