ceph/src/boost/libs/hana/test/optional/representation.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/optional.hpp>
   6
   7 #include <type_traits>
   8 namespace hana = boost::hana;
   9
  10
  11 struct Foo { };
  12
  13 int main() {
  14     auto just = hana::just(Foo{});
  15     static_assert(std::is_same<decltype(just), hana::optional<Foo>>{}, "");
  16
  17     auto nothing = hana::nothing;
  18     static_assert(std::is_same<decltype(nothing), hana::optional<>>{}, "");
  19 }