back.cpp 1012 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/back.hpp>
  6. #include <boost/hana/core/make.hpp>
  7. #include <boost/hana/equal.hpp>
  8. #include <boost/hana/integral_constant.hpp>
  9. #include <boost/hana/range.hpp>
  10. namespace hana = boost::hana;
  11. int main() {
  12. BOOST_HANA_CONSTANT_CHECK(hana::equal(
  13. hana::back(hana::make_range(hana::int_c<0>, hana::int_c<1>)),
  14. hana::int_c<0>
  15. ));
  16. BOOST_HANA_CONSTANT_CHECK(hana::equal(
  17. hana::back(hana::make_range(hana::int_c<0>, hana::int_c<2>)),
  18. hana::int_c<1>
  19. ));
  20. BOOST_HANA_CONSTANT_CHECK(hana::equal(
  21. hana::back(hana::make_range(hana::int_c<0>, hana::int_c<3>)),
  22. hana::int_c<2>
  23. ));
  24. BOOST_HANA_CONSTANT_CHECK(hana::equal(
  25. hana::back(hana::make_range(hana::int_c<3>, hana::int_c<6>)),
  26. hana::int_c<5>
  27. ));
  28. }