| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <memory> |
| |
| // shared_ptr |
| |
| // shared_ptr& operator=(shared_ptr&& r); |
| |
| #include <memory> |
| #include <type_traits> |
| #include <cassert> |
| |
| struct B |
| { |
| static int count; |
| |
| B() {++count;} |
| B(const B&) {++count;} |
| virtual ~B() {--count;} |
| }; |
| |
| int B::count = 0; |
| |
| struct A |
| : public B |
| { |
| static int count; |
| |
| A() {++count;} |
| A(const A&) {++count;} |
| ~A() {--count;} |
| }; |
| |
| int A::count = 0; |
| |
| int main() |
| { |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| { |
| std::shared_ptr<A> pA(new A); |
| A* ptrA = pA.get(); |
| { |
| std::shared_ptr<A> pB(new A); |
| pB = std::move(pA); |
| assert(B::count == 1); |
| assert(A::count == 1); |
| assert(pB.use_count() == 1); |
| assert(pA.use_count() == 0); |
| assert(pA.get() == 0); |
| assert(pB.get() == ptrA); |
| } |
| assert(pA.use_count() == 0); |
| assert(B::count == 0); |
| assert(A::count == 0); |
| } |
| assert(B::count == 0); |
| assert(A::count == 0); |
| { |
| std::shared_ptr<A> pA; |
| A* ptrA = pA.get(); |
| { |
| std::shared_ptr<A> pB(new A); |
| pB = std::move(pA); |
| assert(B::count == 0); |
| assert(A::count == 0); |
| assert(pB.use_count() == 0); |
| assert(pA.use_count() == 0); |
| assert(pA.get() == 0); |
| assert(pB.get() == ptrA); |
| } |
| assert(pA.use_count() == 0); |
| assert(B::count == 0); |
| assert(A::count == 0); |
| } |
| assert(B::count == 0); |
| assert(A::count == 0); |
| { |
| std::shared_ptr<A> pA(new A); |
| A* ptrA = pA.get(); |
| { |
| std::shared_ptr<A> pB; |
| pB = std::move(pA); |
| assert(B::count == 1); |
| assert(A::count == 1); |
| assert(pB.use_count() == 1); |
| assert(pA.use_count() == 0); |
| assert(pA.get() == 0); |
| assert(pB.get() == ptrA); |
| } |
| assert(pA.use_count() == 0); |
| assert(B::count == 0); |
| assert(A::count == 0); |
| } |
| assert(B::count == 0); |
| assert(A::count == 0); |
| { |
| std::shared_ptr<A> pA; |
| A* ptrA = pA.get(); |
| { |
| std::shared_ptr<A> pB; |
| pB = std::move(pA); |
| assert(B::count == 0); |
| assert(A::count == 0); |
| assert(pB.use_count() == 0); |
| assert(pA.use_count() == 0); |
| assert(pA.get() == 0); |
| assert(pB.get() == ptrA); |
| } |
| assert(pA.use_count() == 0); |
| assert(B::count == 0); |
| assert(A::count == 0); |
| } |
| assert(B::count == 0); |
| assert(A::count == 0); |
| #endif // _LIBCXX_HAS_NO_RVALUE_REFERENCES |
| } |