1c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 2c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 3c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// The LLVM Compiler Infrastructure 4c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// 8c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant//===----------------------------------------------------------------------===// 9c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 10c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// <memory> 11c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 12c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// shared_ptr 13c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 14c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant// template<class Y> shared_ptr& operator=(auto_ptr<Y>&& r); 15c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 16c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <memory> 17c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <type_traits> 18c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant#include <cassert> 19c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 20c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantstruct B 21c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant{ 22c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant static int count; 23c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 24c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant B() {++count;} 25c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant B(const B&) {++count;} 26c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant virtual ~B() {--count;} 27c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant}; 28c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 29c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantint B::count = 0; 30c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 31c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantstruct A 32c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant : public B 33c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant{ 34c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant static int count; 35c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 36c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant A() {++count;} 37c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant A(const A&) {++count;} 38c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant ~A() {--count;} 39c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant}; 40c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 41c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantint A::count = 0; 42c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant 43c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnantint main() 44c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant{ 45c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant { 46c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::auto_ptr<A> pA(new A); 47c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant A* ptrA = pA.get(); 48c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant { 49c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::shared_ptr<B> pB(new B); 506b41c6047ba9016a4a183fd77522db941bc32392Howard Hinnant pB = std::move(pA); 51c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 1); 52c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 1); 53c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(pB.use_count() == 1); 54c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(pA.get() == 0); 55c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(pB.get() == ptrA); 56c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant } 57c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 0); 58c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 59c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant } 60c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 0); 61c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 62c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant { 63c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::auto_ptr<A> pA; 64c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant A* ptrA = pA.get(); 65c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant { 66c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::shared_ptr<B> pB(new B); 676b41c6047ba9016a4a183fd77522db941bc32392Howard Hinnant pB = std::move(pA); 68c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 0); 69c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 70c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(pB.use_count() == 1); 71c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(pA.get() == 0); 72c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(pB.get() == ptrA); 73c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant } 74c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 0); 75c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 76c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant } 77c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 0); 78c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 79c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant { 80c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::auto_ptr<A> pA(new A); 81c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant A* ptrA = pA.get(); 82c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant { 83c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::shared_ptr<B> pB; 846b41c6047ba9016a4a183fd77522db941bc32392Howard Hinnant pB = std::move(pA); 85c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 1); 86c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 1); 87c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(pB.use_count() == 1); 88c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(pA.get() == 0); 89c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(pB.get() == ptrA); 90c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant } 91c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 0); 92c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 93c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant } 94c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 0); 95c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 96c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant { 97c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::auto_ptr<A> pA; 98c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant A* ptrA = pA.get(); 99c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant { 100c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant std::shared_ptr<B> pB; 1016b41c6047ba9016a4a183fd77522db941bc32392Howard Hinnant pB = std::move(pA); 102c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 0); 103c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 104c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(pB.use_count() == 1); 105c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(pA.get() == 0); 106c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(pB.get() == ptrA); 107c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant } 108c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 0); 109c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 110c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant } 111c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(B::count == 0); 112c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant assert(A::count == 0); 113c52f43e72dfcea03037729649da84c23b3beb04aHoward Hinnant} 114