is_empty.cpp 797 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/core/make.hpp>
  6. #include <boost/hana/integral_constant.hpp>
  7. #include <boost/hana/is_empty.hpp>
  8. #include <boost/hana/not.hpp>
  9. #include <boost/hana/range.hpp>
  10. namespace hana = boost::hana;
  11. int main() {
  12. BOOST_HANA_CONSTANT_CHECK(hana::is_empty(
  13. hana::make_range(hana::int_c<0>, hana::int_c<0>)
  14. ));
  15. BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(
  16. hana::make_range(hana::int_c<0>, hana::int_c<1>)
  17. )));
  18. BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(
  19. hana::make_range(hana::int_c<0>, hana::int_c<2>)
  20. )));
  21. }