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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <tuple>
// template <class... Types> class tuple;
// template <size_t I, class... Types>
// const typename tuple_element<I, tuple<Types...> >::type&&
// get(const tuple<Types...>&& t);
// UNSUPPORTED: c++98, c++03
#include <tuple>
#include <utility>
#include <string>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
int main()
{
{
typedef std::tuple<int> T;
const T t(3);
static_assert(std::is_same<const int&&, decltype(std::get<0>(std::move(t)))>::value, "");
static_assert(noexcept(std::get<0>(std::move(t))), "");
const int&& i = std::get<0>(std::move(t));
assert(i == 3);
}
{
typedef std::tuple<std::string, int> T;
const T t("high", 5);
static_assert(std::is_same<const std::string&&, decltype(std::get<0>(std::move(t)))>::value, "");
static_assert(noexcept(std::get<0>(std::move(t))), "");
static_assert(std::is_same<const int&&, decltype(std::get<1>(std::move(t)))>::value, "");
static_assert(noexcept(std::get<1>(std::move(t))), "");
const std::string&& s = std::get<0>(std::move(t));
const int&& i = std::get<1>(std::move(t));
assert(s == "high");
assert(i == 5);
}
{
int x = 42;
int const y = 43;
std::tuple<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::tuple<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::tuple<double, int> T;
constexpr const T t(2.718, 5);
static_assert(std::get<0>(std::move(t)) == 2.718, "");
static_assert(std::get<1>(std::move(t)) == 5, "");
}
#endif
}
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