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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 <class... UTypes> tuple(const tuple<UTypes...>& u);
#include <tuple>
#include <utility>
#include <string>
#include <cassert>
struct B
{
int id_;
explicit B(int i) : id_(i) {}
};
struct D
: B
{
explicit D(int i) : B(i) {}
};
#if _LIBCPP_STD_VER > 11
struct A
{
int id_;
constexpr A(int i) : id_(i) {}
friend constexpr bool operator==(const A& x, const A& y) {return x.id_ == y.id_;}
};
struct C
{
int id_;
constexpr explicit C(int i) : id_(i) {}
friend constexpr bool operator==(const C& x, const C& y) {return x.id_ == y.id_;}
};
#endif
int main()
{
{
typedef std::tuple<double> T0;
typedef std::tuple<int> T1;
T0 t0(2.5);
T1 t1 = t0;
assert(std::get<0>(t1) == 2);
}
#if _LIBCPP_STD_VER > 11
{
typedef std::tuple<double> T0;
typedef std::tuple<A> T1;
constexpr T0 t0(2.5);
constexpr T1 t1 = t0;
static_assert(std::get<0>(t1) == 2, "");
}
{
typedef std::tuple<int> T0;
typedef std::tuple<C> T1;
constexpr T0 t0(2);
constexpr T1 t1{t0};
static_assert(std::get<0>(t1) == C(2), "");
}
#endif
{
typedef std::tuple<double, char> T0;
typedef std::tuple<int, int> T1;
T0 t0(2.5, 'a');
T1 t1 = t0;
assert(std::get<0>(t1) == 2);
assert(std::get<1>(t1) == int('a'));
}
{
typedef std::tuple<double, char, D> T0;
typedef std::tuple<int, int, B> T1;
T0 t0(2.5, 'a', D(3));
T1 t1 = t0;
assert(std::get<0>(t1) == 2);
assert(std::get<1>(t1) == int('a'));
assert(std::get<2>(t1).id_ == 3);
}
{
D d(3);
typedef std::tuple<double, char, D&> T0;
typedef std::tuple<int, int, B&> T1;
T0 t0(2.5, 'a', d);
T1 t1 = t0;
d.id_ = 2;
assert(std::get<0>(t1) == 2);
assert(std::get<1>(t1) == int('a'));
assert(std::get<2>(t1).id_ == 2);
}
{
typedef std::tuple<double, char, int> T0;
typedef std::tuple<int, int, B> T1;
T0 t0(2.5, 'a', 3);
T1 t1(t0);
assert(std::get<0>(t1) == 2);
assert(std::get<1>(t1) == int('a'));
assert(std::get<2>(t1).id_ == 3);
}
}
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