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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;
// tuple(const tuple& u) = default;
// UNSUPPORTED: c++98, c++03
#include <tuple>
#include <string>
#include <cassert>
struct Empty {};
int main()
{
{
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 _LIBCPP_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
}
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