57 lines
1.8 KiB
C++
57 lines
1.8 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// <utility>
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// template <class T1, class T2> struct pair
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// tuple_element<I, pair<T1, T2> >::type
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#include <utility>
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template <class T1, class T2>
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void test()
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{
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{
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typedef T1 Exp1;
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typedef T2 Exp2;
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typedef std::pair<T1, T2> P;
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static_assert((std::is_same<typename std::tuple_element<0, P>::type, Exp1>::value), "");
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static_assert((std::is_same<typename std::tuple_element<1, P>::type, Exp2>::value), "");
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}
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{
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typedef T1 const Exp1;
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typedef T2 const Exp2;
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typedef std::pair<T1, T2> const P;
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static_assert((std::is_same<typename std::tuple_element<0, P>::type, Exp1>::value), "");
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static_assert((std::is_same<typename std::tuple_element<1, P>::type, Exp2>::value), "");
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}
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{
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typedef T1 volatile Exp1;
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typedef T2 volatile Exp2;
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typedef std::pair<T1, T2> volatile P;
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static_assert((std::is_same<typename std::tuple_element<0, P>::type, Exp1>::value), "");
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static_assert((std::is_same<typename std::tuple_element<1, P>::type, Exp2>::value), "");
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}
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{
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typedef T1 const volatile Exp1;
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typedef T2 const volatile Exp2;
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typedef std::pair<T1, T2> const volatile P;
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static_assert((std::is_same<typename std::tuple_element<0, P>::type, Exp1>::value), "");
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static_assert((std::is_same<typename std::tuple_element<1, P>::type, Exp2>::value), "");
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}
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}
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int main(int, char**)
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{
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test<int, short>();
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test<int*, char>();
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return 0;
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}
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