is_empty.cpp 639 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/ext/std/integer_sequence.hpp>
  6. #include <boost/hana/is_empty.hpp>
  7. #include <boost/hana/not.hpp>
  8. #include <utility>
  9. namespace hana = boost::hana;
  10. int main() {
  11. BOOST_HANA_CONSTANT_CHECK(hana::is_empty(std::index_sequence<>{}));
  12. BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(std::index_sequence<0>{})));
  13. BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(std::index_sequence<1>{})));
  14. }