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 #if defined(_MSC_VER)
  11 #pragma warning( disable: 4804 ) // '>=': unsafe use of type 'bool' in operation
  12 #endif
  13
  14 #include <boost/mp11/algorithm.hpp>
  15 #include <boost/mp11/list.hpp>
  16 #include <boost/mp11/integral.hpp>
  17 #include <boost/core/lightweight_test_trait.hpp>
  18 #include <type_traits>
  19 #include <tuple>
  20 #include <utility>
  21
  22 struct X1 {};
  23 struct X2 {};
  24 struct X3 {};
  25 struct X4 {};
  26 struct X5 {};
  27
  28 int main()
  29 {
  30     using boost::mp11::mp_list;
  31     using boost::mp11::mp_replace_at;
  32     using boost::mp11::mp_int;
  33     using boost::mp11::mp_true;
  34     using boost::mp11::mp_false;
  35
  36     {
  37         using L = mp_list<X1, X2, X3, X4, X5>;
  38
  39         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<0>, void>, mp_list<void, X2, X3, X4, X5>>));
  40         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<1>, void>, mp_list<X1, void, X3, X4, X5>>));
  41         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<2>, void>, mp_list<X1, X2, void, X4, X5>>));
  42         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<3>, void>, mp_list<X1, X2, X3, void, X5>>));
  43         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<4>, void>, mp_list<X1, X2, X3, X4, void>>));
  44     }
  45
  46     {
  47         using L = std::tuple<X1, X2, X3, X4, X5>;
  48
  49         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<0>, void>, std::tuple<void, X2, X3, X4, X5>>));
  50         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<1>, void>, std::tuple<X1, void, X3, X4, X5>>));
  51         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<2>, void>, std::tuple<X1, X2, void, X4, X5>>));
  52         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<3>, void>, std::tuple<X1, X2, X3, void, X5>>));
  53         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_int<4>, void>, std::tuple<X1, X2, X3, X4, void>>));
  54     }
  55
  56     {
  57         using L = std::pair<X1, X2>;
  58
  59         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_false, void>, std::pair<void, X2>>));
  60         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_replace_at<L, mp_true, void>, std::pair<X1, void>>));
  61     }
  62
  63     return boost::report_errors();
  64 }