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- // Copyright 2015, 2017 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/mp11/integral.hpp>
- #include <boost/core/lightweight_test_trait.hpp>
- #include <type_traits>
- using boost::mp11::mp_invoke_q;
- using boost::mp11::mp_size_t;
- struct Q1
- {
- template<class...> using fn = void;
- };
- struct Q2
- {
- template<class...> class fn;
- };
- struct Q3
- {
- template<class... T> using fn = mp_size_t<sizeof...(T)>;
- };
- struct Q4
- {
- template<class T1, class... T> using fn = T1;
- };
- struct Q5
- {
- template<class T1, class T2> using fn = T2;
- };
- int main()
- {
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q1>, void>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q1, int>, void>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q1, int[], char[]>, void>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q2>, Q2::fn<>>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q2, int>, Q2::fn<int>>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q2, int[], char[]>, Q2::fn<int[], char[]>>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q3>, mp_size_t<0>>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q3, int>, mp_size_t<1>>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q3, int[], char[]>, mp_size_t<2>>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q4, int>, int>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q4, int[], char[]>, int[]>));
- BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q5, int, float>, float>));
- return boost::report_errors();
- }
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