ceph/src/boost/libs/mp11/test/mp_replace_at.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/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 struct X4 {};
  22 struct X5 {};
  23
  24 int main()
  25 {
  26     using boost::mp11::mp_list;
  27     using boost::mp11::mp_replace_at;
  28     using boost::mp11::mp_int;
  29     using boost::mp11::mp_true;
  30     using boost::mp11::mp_false;
  31
  32     {
  33         using L = mp_list<X1, X2, X3, X4, X5>;
  34
  35         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<0>, void>, mp_list<void, X2, X3, X4, X5>>));
  36         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<1>, void>, mp_list<X1, void, X3, X4, X5>>));
  37         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<2>, void>, mp_list<X1, X2, void, X4, X5>>));
  38         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<3>, void>, mp_list<X1, X2, X3, void, X5>>));
  39         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<4>, void>, mp_list<X1, X2, X3, X4, void>>));
  40     }
  41
  42     {
  43         using L = std::tuple<X1, X2, X3, X4, X5>;
  44
  45         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<0>, void>, std::tuple<void, X2, X3, X4, X5>>));
  46         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<1>, void>, std::tuple<X1, void, X3, X4, X5>>));
  47         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<2>, void>, std::tuple<X1, X2, void, X4, X5>>));
  48         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<3>, void>, std::tuple<X1, X2, X3, void, X5>>));
  49         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<4>, void>, std::tuple<X1, X2, X3, X4, void>>));
  50     }
  51
  52     {
  53         using L = std::pair<X1, X2>;
  54
  55         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_false, void>, std::pair<void, X2>>));
  56         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_true, void>, std::pair<X1, void>>));
  57     }
  58
  59     return boost::report_errors();
  60 }