ceph/src/boost/libs/mp11/test/mp_count.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/detail/config.hpp>
  11
  12 #if BOOST_MP11_MSVC
  13 # pragma warning( disable: 4503 ) // decorated name length exceeded
  14 #endif
  15
  16 #include <boost/mp11/algorithm.hpp>
  17 #include <boost/mp11/list.hpp>
  18 #include <boost/mp11/integral.hpp>
  19 #include <boost/core/lightweight_test_trait.hpp>
  20 #include <type_traits>
  21 #include <tuple>
  22 #include <utility>
  23
  24 struct X1 {};
  25 struct X2 {};
  26 struct X3 {};
  27
  28 int main()
  29 {
  30     using boost::mp11::mp_list;
  31     using boost::mp11::mp_count;
  32     using boost::mp11::mp_size_t;
  33
  34     {
  35         using L1 = mp_list<>;
  36
  37         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count<L1, void>, mp_size_t<0>>));
  38
  39         using L2 = mp_list<X1, X2, X3, X2, X3, X3>;
  40
  41         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count<L2, void>, mp_size_t<0>>));
  42         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count<L2, X1>, mp_size_t<1>>));
  43         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count<L2, X2>, mp_size_t<2>>));
  44         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count<L2, X3>, mp_size_t<3>>));
  45     }
  46
  47     {
  48         using L3 = std::tuple<>;
  49
  50         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count<L3, void>, mp_size_t<0>>));
  51
  52         using L4 = std::tuple<X1, X2, X3, X2, X3, X3>;
  53
  54         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count<L4, void>, mp_size_t<0>>));
  55         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count<L4, X1>, mp_size_t<1>>));
  56         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count<L4, X2>, mp_size_t<2>>));
  57         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count<L4, X3>, mp_size_t<3>>));
  58     }
  59
  60     {
  61         using L5 = std::pair<X1, X2>;
  62
  63         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count<L5, void>, mp_size_t<0>>));
  64         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count<L5, X1>, mp_size_t<1>>));
  65         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_count<L5, X2>, mp_size_t<1>>));
  66     }
  67
  68     {
  69         using boost::mp11::mp_repeat_c;
  70
  71         int const N = 1089;
  72
  73         using L = mp_repeat_c<mp_list<void>, N>;
  74         using R = mp_count<L, void>;
  75
  76         BOOST_TEST_TRAIT_TRUE((std::is_same<R, mp_size_t<N>>));
  77     }
  78
  79     return boost::report_errors();
  80 }