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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <utility>
// template <class T1, class T2> struct pair
// template<size_t I, class T1, class T2>
// const typename tuple_element<I, std::pair<T1, T2> >::type&&
// get(const pair<T1, T2>&&);
// UNSUPPORTED: c++98, c++03
#include <utility>
#include <memory>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
int main(int, char**)
{
{
typedef std::pair<std::unique_ptr<int>, short> P;
const P p(std::unique_ptr<int>(new int(3)), static_cast<short>(4));
static_assert(std::is_same<const std::unique_ptr<int>&&, decltype(std::get<0>(std::move(p)))>::value, "");
static_assert(noexcept(std::get<0>(std::move(p))), "");
const std::unique_ptr<int>&& ptr = std::get<0>(std::move(p));
assert(*ptr == 3);
}
{
int x = 42;
int const y = 43;
std::pair<int&, int const&> const p(x, y);
static_assert(std::is_same<int&, decltype(std::get<0>(std::move(p)))>::value, "");
static_assert(noexcept(std::get<0>(std::move(p))), "");
static_assert(std::is_same<int const&, decltype(std::get<1>(std::move(p)))>::value, "");
static_assert(noexcept(std::get<1>(std::move(p))), "");
}
{
int x = 42;
int const y = 43;
std::pair<int&&, int const&&> const p(std::move(x), std::move(y));
static_assert(std::is_same<int&&, decltype(std::get<0>(std::move(p)))>::value, "");
static_assert(noexcept(std::get<0>(std::move(p))), "");
static_assert(std::is_same<int const&&, decltype(std::get<1>(std::move(p)))>::value, "");
static_assert(noexcept(std::get<1>(std::move(p))), "");
}
#if TEST_STD_VER > 11
{
typedef std::pair<int, short> P;
constexpr const P p1(3, static_cast<short>(4));
static_assert(std::get<0>(std::move(p1)) == 3, "");
static_assert(std::get<1>(std::move(p1)) == 4, "");
}
#endif
return 0;
}
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