60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
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// Copyright 2017, 2020 Peter Dimov.
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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#include <boost/mp11/utility.hpp>
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#include <boost/core/lightweight_test_trait.hpp>
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template<class T> struct F1 {};
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template<class T> struct F2 {};
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template<class T> struct F3 {};
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template<class T> using G1 = F1<T>;
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template<class T> using G2 = F2<T>;
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template<class T> using G3 = F3<T>;
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int main()
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{
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using namespace boost::mp11;
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#if !BOOST_MP11_WORKAROUND( BOOST_MP11_MSVC, < 1900 )
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose<>::fn<void>, void>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose<F1>::fn<void>, F1<void>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose<G1>::fn<void>, F1<void>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose<F1, F2>::fn<void>, F2<F1<void>>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose<G1, G2>::fn<void>, F2<F1<void>>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose<F1, F2, F3>::fn<void>, F3<F2<F1<void>>>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose<G1, G2, G3>::fn<void>, F3<F2<F1<void>>>>));
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#endif
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using QF1 = mp_quote<F1>;
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using QF2 = mp_quote<F2>;
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using QF3 = mp_quote<F3>;
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using QG1 = mp_quote<G1>;
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using QG2 = mp_quote<G2>;
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using QG3 = mp_quote<G3>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose_q<>::fn<void>, void>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose_q<QF1>::fn<void>, F1<void>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose_q<QG1>::fn<void>, F1<void>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose_q<QF1, QF2>::fn<void>, F2<F1<void>>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose_q<QG1, QG2>::fn<void>, F2<F1<void>>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose_q<QF1, QF2, QF3>::fn<void>, F3<F2<F1<void>>>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_compose_q<QG1, QG2, QG3>::fn<void>, F3<F2<F1<void>>>>));
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//
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return boost::report_errors();
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}
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