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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
//
//===----------------------------------------------------------------------===//
// <tuple>
// template <class... Types> class tuple;
// tuple(const tuple& u) = default;
// UNSUPPORTED: c++98, c++03
#include <tuple>
#include <string>
#include <cassert>
#include "test_macros.h"
struct Empty {};
int main(int, char**)
{
{
typedef std::tuple<> T;
T t0;
T t = t0;
((void)t); // Prevent unused warning
}
{
typedef std::tuple<int> T;
T t0(2);
T t = t0;
assert(std::get<0>(t) == 2);
}
{
typedef std::tuple<int, char> T;
T t0(2, 'a');
T t = t0;
assert(std::get<0>(t) == 2);
assert(std::get<1>(t) == 'a');
}
{
typedef std::tuple<int, char, std::string> T;
const T t0(2, 'a', "some text");
T t = t0;
assert(std::get<0>(t) == 2);
assert(std::get<1>(t) == 'a');
assert(std::get<2>(t) == "some text");
}
#if TEST_STD_VER > 11
{
typedef std::tuple<int> T;
constexpr T t0(2);
constexpr T t = t0;
static_assert(std::get<0>(t) == 2, "");
}
{
typedef std::tuple<Empty> T;
constexpr T t0;
constexpr T t = t0;
constexpr Empty e = std::get<0>(t);
((void)e); // Prevent unused warning
}
#endif
return 0;
}
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