first_second.cpp 759 B

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  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/equal.hpp>
  6. #include <boost/hana/ext/std/pair.hpp>
  7. #include <boost/hana/first.hpp>
  8. #include <boost/hana/second.hpp>
  9. #include <laws/base.hpp>
  10. #include <utility>
  11. namespace hana = boost::hana;
  12. using hana::test::ct_eq;
  13. int main() {
  14. // first
  15. BOOST_HANA_CONSTANT_CHECK(hana::equal(
  16. hana::first(std::make_pair(ct_eq<0>{}, ct_eq<1>{})),
  17. ct_eq<0>{}
  18. ));
  19. // second
  20. BOOST_HANA_CONSTANT_CHECK(hana::equal(
  21. hana::second(std::make_pair(ct_eq<0>{}, ct_eq<1>{})),
  22. ct_eq<1>{}
  23. ));
  24. }