ceph/src/boost/libs/mp11/test/mp_find.cpp

   1
   2 //  Copyright 2015 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/mp11/integral.hpp>
  13 #include <boost/core/lightweight_test_trait.hpp>
  14 #include <type_traits>
  15 #include <tuple>
  16 #include <utility>
  17
  18 struct X1 {};
  19 struct X2 {};
  20 struct X3 {};
  21
  22 int main()
  23 {
  24     using boost::mp11::mp_list;
  25     using boost::mp11::mp_find;
  26     using boost::mp11::mp_size_t;
  27
  28     {
  29         using L1 = mp_list<>;
  30
  31         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find<L1, void>, mp_size_t<0>>));
  32
  33         using L2 = mp_list<X1, X2, X2, X3, X3, X3>;
  34
  35         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find<L2, void>, mp_size_t<6>>));
  36         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find<L2, X1>, mp_size_t<0>>));
  37         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find<L2, X2>, mp_size_t<1>>));
  38         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find<L2, X3>, mp_size_t<3>>));
  39     }
  40
  41     {
  42         using L3 = std::tuple<>;
  43
  44         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find<L3, void>, mp_size_t<0>>));
  45
  46         using L4 = std::tuple<X1, X2, X2, X3, X3, X3>;
  47
  48         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find<L4, void>, mp_size_t<6>>));
  49         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find<L4, X1>, mp_size_t<0>>));
  50         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find<L4, X2>, mp_size_t<1>>));
  51         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find<L4, X3>, mp_size_t<3>>));
  52     }
  53
  54     {
  55         using L5 = std::pair<X1, X2>;
  56
  57         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find<L5, void>, mp_size_t<2>>));
  58         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find<L5, X1>, mp_size_t<0>>));
  59         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find<L5, X2>, mp_size_t<1>>));
  60     }
  61
  62     return boost::report_errors();
  63 }