87 lines
2.5 KiB
C++
87 lines
2.5 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/core/lightweight_test_trait.hpp>
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#include <type_traits>
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using boost::mp11::mp_invoke;
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template<class...> struct X {};
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template<template<class...> class F, class... T> using Y = X<F<T>...>;
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template<class Q, class... T> using Z = X<mp_invoke<Q, T>...>;
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struct B {};
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struct D1: B {};
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struct D2: B {};
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struct ND {};
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template<class... T> using is_base_of_t = typename std::is_base_of<T...>::type;
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int main()
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{
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using boost::mp11::mp_identity_t;
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using boost::mp11::mp_quote;
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{
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using Q = mp_quote<mp_identity_t>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, void>, void>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, int[]>, int[]>));
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}
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{
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using Q = mp_quote<std::is_same, void>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, void>, std::is_same<void, void>>));
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, int[]>, std::is_same<void, int[]>>));
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}
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{
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using Q = mp_quote<X, char[1], char[2], char[3]>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, int[1], int[2], int[3]>, X<char[1], char[2], char[3], int[1], int[2], int[3]>>));
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}
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{
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using Q = mp_quote<mp_identity_t>;
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// using R1 = Y<Q::fn, void, char, int>;
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// BOOST_TEST_TRAIT_TRUE((std::is_same<R1, X<void, char, int>>));
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//
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// error: pack expansion used as argument for non-pack parameter of alias template
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#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1910 && BOOST_MSVC >= 1900 )
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#else
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using R2 = Z<Q, void, char, int>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<R2, X<void, char, int>>));
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#endif
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}
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{
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using Q = mp_quote<is_base_of_t, B>;
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#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1800 )
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#else
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using R1 = Y<Q::fn, D1, D2, ND, int>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<R1, X<std::true_type, std::true_type, std::false_type, std::false_type>>));
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#endif
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#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1910 && BOOST_MSVC >= 1900 )
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#else
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using R2 = Z<Q, D1, D2, ND, int>;
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BOOST_TEST_TRAIT_TRUE((std::is_same<R2, X<std::true_type, std::true_type, std::false_type, std::false_type>>));
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#endif
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}
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return boost::report_errors();
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}
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