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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;
// template <class... UTypes> tuple(const tuple<UTypes...>& u);
// UNSUPPORTED: c++03
#include <tuple>
#include <utility>
#include <string>
#include <cassert>
#include "test_macros.h"
struct Explicit {
int value;
explicit Explicit(int x) : value(x) {}
};
struct Implicit {
int value;
Implicit(int x) : value(x) {}
};
struct ExplicitTwo {
ExplicitTwo() {}
ExplicitTwo(ExplicitTwo const&) {}
ExplicitTwo(ExplicitTwo &&) {}
template <class T, class = typename std::enable_if<!std::is_same<T, ExplicitTwo>::value>::type>
explicit ExplicitTwo(T) {}
};
struct B
{
int id_;
explicit B(int i) : id_(i) {}
};
struct D
: B
{
explicit D(int i) : B(i) {}
};
#if TEST_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(int, char**)
{
{
typedef std::tuple<long> T0;
typedef std::tuple<long long> T1;
T0 t0(2);
T1 t1 = t0;
assert(std::get<0>(t1) == 2);
}
#if TEST_STD_VER > 11
{
typedef std::tuple<int> T0;
typedef std::tuple<A> T1;
constexpr T0 t0(2);
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<long, char> T0;
typedef std::tuple<long long, int> T1;
T0 t0(2, 'a');
T1 t1 = t0;
assert(std::get<0>(t1) == 2);
assert(std::get<1>(t1) == int('a'));
}
{
typedef std::tuple<long, char, D> T0;
typedef std::tuple<long long, int, B> T1;
T0 t0(2, '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<long, char, D&> T0;
typedef std::tuple<long long, int, B&> T1;
T0 t0(2, '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<long, char, int> T0;
typedef std::tuple<long long, int, B> T1;
T0 t0(2, '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);
}
{
const std::tuple<int> t1(42);
std::tuple<Explicit> t2(t1);
assert(std::get<0>(t2).value == 42);
}
{
const std::tuple<int> t1(42);
std::tuple<Implicit> t2 = t1;
assert(std::get<0>(t2).value == 42);
}
{
static_assert(std::is_convertible<ExplicitTwo&&, ExplicitTwo>::value, "");
static_assert(std::is_convertible<std::tuple<ExplicitTwo&&>&&, const std::tuple<ExplicitTwo>&>::value, "");
ExplicitTwo e;
std::tuple<ExplicitTwo> t = std::tuple<ExplicitTwo&&>(std::move(e));
((void)t);
}
return 0;
}
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