convert_move.pass.cpp
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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(tuple<UTypes...>&& u);
// UNSUPPORTED: c++03
#include <tuple>
#include <string>
#include <memory>
#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 B
{
int id_;
explicit B(int i) : id_(i) {}
virtual ~B() {}
};
struct D
: B
{
explicit D(int i) : B(i) {}
};
struct BonkersBananas {
template <class T>
operator T() &&;
template <class T, class = void>
explicit operator T() && = delete;
};
void test_bonkers_bananas_conversion() {
using ReturnType = std::tuple<int, int>;
static_assert(std::is_convertible<BonkersBananas, ReturnType>(), "");
static_assert(!std::is_constructible<ReturnType, BonkersBananas>(), "");
}
int main(int, char**)
{
{
typedef std::tuple<long> T0;
typedef std::tuple<long long> T1;
T0 t0(2);
T1 t1 = std::move(t0);
assert(std::get<0>(t1) == 2);
}
{
typedef std::tuple<long, char> T0;
typedef std::tuple<long long, int> T1;
T0 t0(2, 'a');
T1 t1 = std::move(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 = std::move(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 = std::move(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, std::unique_ptr<D>> T0;
typedef std::tuple<long long, int, std::unique_ptr<B>> T1;
T0 t0(2, 'a', std::unique_ptr<D>(new D(3)));
T1 t1 = std::move(t0);
assert(std::get<0>(t1) == 2);
assert(std::get<1>(t1) == int('a'));
assert(std::get<2>(t1)->id_ == 3);
}
{
std::tuple<int> t1(42);
std::tuple<Explicit> t2(std::move(t1));
assert(std::get<0>(t2).value == 42);
}
{
std::tuple<int> t1(42);
std::tuple<Implicit> t2 = std::move(t1);
assert(std::get<0>(t2).value == 42);
}
return 0;
}