ceph/src/boost/libs/hana/example/map/to.cpp

   1 // Copyright Louis Dionne 2013-2017
   2 // Distributed under the Boost Software License, Version 1.0.
   3 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
   4
   5 #include <boost/hana/assert.hpp>
   6 #include <boost/hana/core/to.hpp>
   7 #include <boost/hana/map.hpp>
   8 #include <boost/hana/pair.hpp>
   9 #include <boost/hana/tuple.hpp>
  10 #include <boost/hana/type.hpp>
  11
  12 #include <string>
  13 namespace hana = boost::hana;
  14 using namespace std::literals;
  15
  16
  17 int main() {
  18     auto xs = hana::make_tuple(
  19         hana::make_pair(hana::type_c<int>, "abcd"s),
  20         hana::make_pair(hana::type_c<void>, 1234),
  21         hana::make_pair(hana::type_c<int>, nullptr)
  22     );
  23
  24     BOOST_HANA_RUNTIME_CHECK(
  25         hana::to<hana::map_tag>(xs) == hana::make_map(
  26             hana::make_pair(hana::type_c<int>, "abcd"s),
  27             hana::make_pair(hana::type_c<void>, 1234)
  28         )
  29     );
  30 }