special.empty.cpp 713 B

12345678910111213141516171819202122232425
  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. #include <boost/hana/assert.hpp>
  5. #include <boost/hana/empty.hpp>
  6. #include <boost/hana/equal.hpp>
  7. #include <boost/hana/tuple.hpp>
  8. namespace hana = boost::hana;
  9. int main() {
  10. BOOST_HANA_CONSTANT_CHECK(hana::equal(
  11. hana::empty<hana::tuple_tag>(),
  12. hana::tuple_c<int>
  13. ));
  14. BOOST_HANA_CONSTANT_CHECK(hana::equal(
  15. hana::empty<hana::tuple_tag>(),
  16. hana::tuple_c<long>
  17. ));
  18. BOOST_HANA_CONSTANT_CHECK(hana::equal(
  19. hana::empty<hana::tuple_tag>(),
  20. hana::tuple_c<void>
  21. ));
  22. }