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- // Copyright 2019 Peter Dimov.
- //
- // Distributed under the Boost Software License, Version 1.0.
- //
- // See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt
- #include <boost/mp11/utility.hpp>
- #include <boost/core/lightweight_test_trait.hpp>
- #include <type_traits>
- template<class T> using is_const_ = std::is_const<T>;
- struct Q_is_const
- {
- template<class T> using fn = std::is_const<T>;
- };
- int main()
- {
- using boost::mp11::mp_not_fn;
- using boost::mp11::mp_not_fn_q;
- BOOST_TEST_TRAIT_TRUE((mp_not_fn<std::is_const>::fn<void>));
- BOOST_TEST_TRAIT_FALSE((mp_not_fn<std::is_const>::fn<void const>));
- BOOST_TEST_TRAIT_TRUE((mp_not_fn<is_const_>::fn<void>));
- BOOST_TEST_TRAIT_FALSE((mp_not_fn<is_const_>::fn<void const>));
- BOOST_TEST_TRAIT_TRUE((mp_not_fn_q<Q_is_const>::fn<void>));
- BOOST_TEST_TRAIT_FALSE((mp_not_fn_q<Q_is_const>::fn<void const>));
- return boost::report_errors();
- }
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