ceph/src/boost/libs/hana/test/optional/operator_deref.cpp

   1 // Copyright Louis Dionne 2013-2016
   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
   5 #include <boost/hana/assert.hpp>
   6 #include <boost/hana/equal.hpp>
   7 #include <boost/hana/optional.hpp>
   8
   9 #include <laws/base.hpp>
  10 namespace hana = boost::hana;
  11 using hana::test::ct_eq;
  12
  13
  14 int main() {
  15     auto lvalue = hana::just(ct_eq<3>{});
  16     ct_eq<3>& ref = *lvalue;
  17     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  18         ref,
  19         ct_eq<3>{}
  20     ));
  21
  22     auto const const_lvalue = hana::just(ct_eq<3>{});
  23     ct_eq<3> const& const_ref = *const_lvalue;
  24     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  25         const_ref,
  26         ct_eq<3>{}
  27     ));
  28
  29     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  30         *hana::just(ct_eq<3>{}),
  31         ct_eq<3>{}
  32     ));
  33 }