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

   1
   2 // Copyright 2015, 2019 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/core/lightweight_test_trait.hpp>
  11 #include <boost/mp11/algorithm.hpp>
  12 #include <boost/mp11/list.hpp>
  13 #include <boost/mp11/utility.hpp>
  14 #include <type_traits>
  15 #include <tuple>
  16 #include <utility>
  17
  18 int main()
  19 {
  20     using boost::mp11::mp_list;
  21     using boost::mp11::mp_pop_back;
  22
  23     using L1 = mp_list<void>;
  24     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_pop_back<L1>, mp_list<>>));
  25
  26     using L2 = mp_list<float, void, int[]>;
  27     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_pop_back<L2>, mp_list<float, void>>));
  28
  29     using L3 = std::tuple<int>;
  30     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_pop_back<L3>, std::tuple<>>));
  31
  32     using L4 = std::tuple<char, double>;
  33     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_pop_back<L4>, std::tuple<char>>));
  34
  35     using boost::mp11::mp_iota_c;
  36     using boost::mp11::mp_size_t;
  37
  38     int const N = 137;
  39
  40     using L6 = mp_iota_c<N>;
  41     BOOST_TEST_TRAIT_TRUE((std::is_same<mp_pop_back<L6>, mp_iota_c<N-1>>));
  42
  43     using boost::mp11::mp_valid;
  44
  45     using L7 = mp_list<>;
  46     BOOST_TEST_TRAIT_FALSE((mp_valid<mp_pop_back, L7>));
  47
  48     return boost::report_errors();
  49 }