64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
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// Copyright 2015, 2017 Peter Dimov.
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//
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// Distributed under the Boost Software License, Version 1.0.
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//
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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#include <boost/mp11/utility.hpp>
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#include <boost/mp11/integral.hpp>
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#include <boost/core/lightweight_test_trait.hpp>
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#include <type_traits>
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using boost::mp11::mp_invoke_q;
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using boost::mp11::mp_size_t;
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struct Q1
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{
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template<class...> using fn = void;
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};
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struct Q2
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{
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template<class...> class fn;
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};
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struct Q3
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{
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template<class... T> using fn = mp_size_t<sizeof...(T)>;
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};
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struct Q4
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{
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template<class T1, class... T> using fn = T1;
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};
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struct Q5
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{
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template<class T1, class T2> using fn = T2;
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};
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int main()
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{
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q1>, void>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q1, int>, void>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q1, int[], char[]>, void>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q2>, Q2::fn<>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q2, int>, Q2::fn<int>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q2, int[], char[]>, Q2::fn<int[], char[]>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q3>, mp_size_t<0>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q3, int>, mp_size_t<1>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q3, int[], char[]>, mp_size_t<2>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q4, int>, int>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q4, int[], char[]>, int[]>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke_q<Q5, int, float>, float>));
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return boost::report_errors();
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}
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