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67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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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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// template<size_t I, class T1, class T2>
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// const typename tuple_element<I, std::pair<T1, T2> >::type&&
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// get(const pair<T1, T2>&&);
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// UNSUPPORTED: c++98, c++03
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#include <utility>
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#include <memory>
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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int main()
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{
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{
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typedef std::pair<std::unique_ptr<int>, short> P;
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const P p(std::unique_ptr<int>(new int(3)), static_cast<short>(4));
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static_assert(std::is_same<const std::unique_ptr<int>&&, decltype(std::get<0>(std::move(p)))>::value, "");
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static_assert(noexcept(std::get<0>(std::move(p))), "");
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const std::unique_ptr<int>&& ptr = std::get<0>(std::move(p));
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assert(*ptr == 3);
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}
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{
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int x = 42;
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int const y = 43;
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std::pair<int&, int const&> const p(x, y);
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static_assert(std::is_same<int&, decltype(std::get<0>(std::move(p)))>::value, "");
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static_assert(noexcept(std::get<0>(std::move(p))), "");
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static_assert(std::is_same<int const&, decltype(std::get<1>(std::move(p)))>::value, "");
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static_assert(noexcept(std::get<1>(std::move(p))), "");
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}
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{
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int x = 42;
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int const y = 43;
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std::pair<int&&, int const&&> const p(std::move(x), std::move(y));
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static_assert(std::is_same<int&&, decltype(std::get<0>(std::move(p)))>::value, "");
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static_assert(noexcept(std::get<0>(std::move(p))), "");
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static_assert(std::is_same<int const&&, decltype(std::get<1>(std::move(p)))>::value, "");
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static_assert(noexcept(std::get<1>(std::move(p))), "");
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}
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#if TEST_STD_VER > 11
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{
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typedef std::pair<int, short> P;
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constexpr const P p1(3, static_cast<short>(4));
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static_assert(std::get<0>(std::move(p1)) == 3, "");
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static_assert(std::get<1>(std::move(p1)) == 4, "");
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}
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#endif
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}
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