text: /*
  @copyright Louis Dionne 2015
  Distributed under the Boost Software License, Version 1.0.
  (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
   */
  
  #include <boost/hana/assert.hpp>
  #include <boost/hana/equal.hpp>
  #include <boost/hana/optional.hpp>
  #include <boost/hana/type.hpp>
  
  #include <string>
  namespace hana = boost::hana;
  
  
  int main() {
      static_assert(hana::just('x').value() == 'x', "");
      BOOST_HANA_CONSTANT_CHECK(*hana::just(hana::type_c<int>) == hana::type_c<int>);
      BOOST_HANA_RUNTIME_CHECK(hana::just(std::string{"abcd"})->size() == 4);
  
      // hana::nothing.value(); // compile-time error
  }
  