front.cpp 773 B

12345678910111213141516171819202122232425262728
  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/front.hpp>
  7. #include <boost/hana/integral_constant.hpp>
  8. #include <boost/hana/string.hpp>
  9. namespace hana = boost::hana;
  10. int main() {
  11. BOOST_HANA_CONSTANT_CHECK(hana::equal(
  12. hana::front(BOOST_HANA_STRING("a")),
  13. hana::char_c<'a'>
  14. ));
  15. BOOST_HANA_CONSTANT_CHECK(hana::equal(
  16. hana::front(BOOST_HANA_STRING("ab")),
  17. hana::char_c<'a'>
  18. ));
  19. BOOST_HANA_CONSTANT_CHECK(hana::equal(
  20. hana::front(BOOST_HANA_STRING("abc")),
  21. hana::char_c<'a'>
  22. ));
  23. }