ceph/src/boost/libs/hana/test/type/equal.cpp

   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
   5 #include <boost/hana/assert.hpp>
   6 #include <boost/hana/equal.hpp>
   7 #include <boost/hana/not.hpp>
   8 #include <boost/hana/not_equal.hpp> // for operator !=
   9 #include <boost/hana/type.hpp>
  10 namespace hana = boost::hana;
  11
  12
  13 struct T;
  14 struct U;
  15
  16 int main() {
  17     BOOST_HANA_CONSTANT_CHECK(hana::equal(hana::type_c<T>, hana::type_c<T>));
  18     BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::equal(hana::type_c<T>, hana::type_c<U>)));
  19     BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::equal(hana::type_c<void>, hana::type_c<U>)));
  20     BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::equal(hana::type_c<T>, hana::type_c<void>)));
  21     BOOST_HANA_CONSTANT_CHECK(hana::equal(hana::type_c<void>, hana::type_c<void>));
  22
  23     BOOST_HANA_CONSTANT_CHECK(hana::equal(hana::type_c<T&>, hana::type_c<T&>));
  24     BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::equal(hana::type_c<T&>, hana::type_c<T&&>)));
  25     BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::equal(hana::type_c<T const>, hana::type_c<T>)));
  26     BOOST_HANA_CONSTANT_CHECK(hana::equal(hana::type_c<T const>, hana::type_c<T const>));
  27
  28     // make sure we don't read from a non-constexpr variable in hana::equal
  29     auto t = hana::type_c<T>;
  30     static_assert(hana::equal(t, hana::type_c<T>), "");
  31
  32     // check operators
  33     BOOST_HANA_CONSTANT_CHECK(hana::type_c<T> == hana::type_c<T>);
  34     BOOST_HANA_CONSTANT_CHECK(hana::type_c<T> != hana::type_c<U>);
  35 }