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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++98, 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;
- }
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