value.cpp 507 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/integral_constant.hpp>
  5. #include <boost/hana/value.hpp>
  6. namespace hana = boost::hana;
  7. int main() {
  8. auto i = hana::integral_c<int, 3>; // notice no constexpr
  9. static_assert(hana::value<decltype(i)>() == 3, "");
  10. static_assert(hana::value(i) == 3, "value(i) is always a constant expression!");
  11. }