ceph/src/boost/libs/hana/test/optional/make.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/core/make.hpp>
   7 #include <boost/hana/equal.hpp>
   8 #include <boost/hana/optional.hpp>
   9
  10 #include <laws/base.hpp>
  11 namespace hana = boost::hana;
  12 using hana::test::ct_eq;
  13
  14
  15 int main() {
  16     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  17         hana::make<hana::optional_tag>(),
  18         hana::nothing
  19     ));
  20
  21     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  22         hana::make<hana::optional_tag>(ct_eq<3>{}),
  23         hana::just(ct_eq<3>{})
  24     ));
  25
  26     // Check that make_optional == make<optional_tag>
  27     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  28         hana::make_optional(),
  29         hana::make<hana::optional_tag>()
  30     ));
  31
  32     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  33         hana::make_optional(ct_eq<3>{}),
  34         hana::make<hana::optional_tag>(ct_eq<3>{})
  35     ));
  36 }