text: // Copyright Louis Dionne 2013-2017
  // 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/core/make.hpp>
  #include <boost/hana/core/tag_of.hpp>
  #include <boost/hana/equal.hpp>
  #include <boost/hana/integral_constant.hpp>
  #include <boost/hana/range.hpp>
  #include <boost/hana/unpack.hpp>
  
  #include <laws/base.hpp>
  
  #include <type_traits>
  namespace hana = boost::hana;
  
  
  int main() {
      hana::test::_injection<0> f{};
  
      BOOST_HANA_CONSTANT_CHECK(hana::equal(
          hana::unpack(hana::make_range(hana::int_c<0>, hana::int_c<0>), f),
          f()
      ));
      BOOST_HANA_CONSTANT_CHECK(hana::equal(
          hana::unpack(hana::make_range(hana::int_c<0>, hana::int_c<1>), f),
          f(hana::int_c<0>)
      ));
      BOOST_HANA_CONSTANT_CHECK(hana::equal(
          hana::unpack(hana::make_range(hana::int_c<0>, hana::int_c<2>), f),
          f(hana::int_c<0>, hana::int_c<1>)
      ));
      BOOST_HANA_CONSTANT_CHECK(hana::equal(
          hana::unpack(hana::make_range(hana::int_c<0>, hana::int_c<3>), f),
          f(hana::int_c<0>, hana::int_c<1>, hana::int_c<2>)
      ));
  
      // Previously, we would only unpack with `std::size_t`s. Make
      // sure this does not happen.
      hana::unpack(hana::make_range(hana::int_c<0>, hana::int_c<1>), [](auto x) {
          using T = hana::tag_of_t<decltype(x)>;
          static_assert(std::is_same<typename T::value_type, int>{}, "");
      });
  }
  