123 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// <tuple>10 11// template <class... Types> class tuple;12 13// template <class... UTypes> tuple(tuple<UTypes...>&& u);14 15// UNSUPPORTED: c++0316 17#include <tuple>18#include <string>19#include <memory>20#include <cassert>21 22#include "test_macros.h"23 24struct Explicit {25 int value;26 explicit Explicit(int x) : value(x) {}27};28 29struct Implicit {30 int value;31 Implicit(int x) : value(x) {}32};33 34struct B35{36 int id_;37 38 explicit B(int i) : id_(i) {}39 B(const B&) = default;40 B& operator=(const B&) = default;41 virtual ~B() {}42};43 44struct D45 : B46{47 explicit D(int i) : B(i) {}48};49 50struct BonkersBananas {51 template <class T>52 operator T() &&;53 template <class T, class = void>54 explicit operator T() && = delete;55};56 57void test_bonkers_bananas_conversion() {58 using ReturnType = std::tuple<int, int>;59 static_assert(std::is_convertible<BonkersBananas, ReturnType>(), "");60 static_assert(!std::is_constructible<ReturnType, BonkersBananas>(), "");61 62}63 64int main(int, char**)65{66 {67 typedef std::tuple<long> T0;68 typedef std::tuple<long long> T1;69 T0 t0(2);70 T1 t1 = std::move(t0);71 assert(std::get<0>(t1) == 2);72 }73 {74 typedef std::tuple<long, char> T0;75 typedef std::tuple<long long, int> T1;76 T0 t0(2, 'a');77 T1 t1 = std::move(t0);78 assert(std::get<0>(t1) == 2);79 assert(std::get<1>(t1) == int('a'));80 }81 {82 typedef std::tuple<long, char, D> T0;83 typedef std::tuple<long long, int, B> T1;84 T0 t0(2, 'a', D(3));85 T1 t1 = std::move(t0);86 assert(std::get<0>(t1) == 2);87 assert(std::get<1>(t1) == int('a'));88 assert(std::get<2>(t1).id_ == 3);89 }90 {91 D d(3);92 typedef std::tuple<long, char, D&> T0;93 typedef std::tuple<long long, int, B&> T1;94 T0 t0(2, 'a', d);95 T1 t1 = std::move(t0);96 d.id_ = 2;97 assert(std::get<0>(t1) == 2);98 assert(std::get<1>(t1) == int('a'));99 assert(std::get<2>(t1).id_ == 2);100 }101 {102 typedef std::tuple<long, char, std::unique_ptr<D>> T0;103 typedef std::tuple<long long, int, std::unique_ptr<B>> T1;104 T0 t0(2, 'a', std::unique_ptr<D>(new D(3)));105 T1 t1 = std::move(t0);106 assert(std::get<0>(t1) == 2);107 assert(std::get<1>(t1) == int('a'));108 assert(std::get<2>(t1)->id_ == 3);109 }110 {111 std::tuple<int> t1(42);112 std::tuple<Explicit> t2(std::move(t1));113 assert(std::get<0>(t2).value == 42);114 }115 {116 std::tuple<int> t1(42);117 std::tuple<Implicit> t2 = std::move(t1);118 assert(std::get<0>(t2).value == 42);119 }120 121 return 0;122}123