| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <memory> |
| |
| // shared_ptr |
| |
| // template<class T, class U> shared_ptr<T> static_pointer_cast(const shared_ptr<U>& r) noexcept; |
| // template<class T, class U> shared_ptr<T> static_pointer_cast(shared_ptr<U>&& r) noexcept; |
| |
| #include <cassert> |
| #include <memory> |
| #include <type_traits> |
| #include <utility> |
| |
| #include "test_macros.h" |
| |
| 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& other) : B(other) {++count;} |
| ~A() {--count;} |
| }; |
| |
| int A::count = 0; |
| |
| int main(int, char**) |
| { |
| { |
| const std::shared_ptr<A> pA(new A); |
| ASSERT_NOEXCEPT(std::static_pointer_cast<B>(pA)); |
| std::shared_ptr<B> pB = std::static_pointer_cast<B>(pA); |
| assert(pB.get() == pA.get()); |
| assert(!pB.owner_before(pA) && !pA.owner_before(pB)); |
| } |
| { |
| const std::shared_ptr<B> pA(new A); |
| std::shared_ptr<A> pB = std::static_pointer_cast<A>(pA); |
| assert(pB.get() == pA.get()); |
| assert(!pB.owner_before(pA) && !pA.owner_before(pB)); |
| } |
| { |
| const std::shared_ptr<A> pA; |
| std::shared_ptr<B> pB = std::static_pointer_cast<B>(pA); |
| assert(pB.get() == pA.get()); |
| assert(!pB.owner_before(pA) && !pA.owner_before(pB)); |
| } |
| { |
| const std::shared_ptr<B> pA; |
| std::shared_ptr<A> pB = std::static_pointer_cast<A>(pA); |
| assert(pB.get() == pA.get()); |
| assert(!pB.owner_before(pA) && !pA.owner_before(pB)); |
| } |
| #if TEST_STD_VER > 14 |
| { |
| const std::shared_ptr<A[8]> pA; |
| std::shared_ptr<B[8]> pB = std::static_pointer_cast<B[8]>(pA); |
| assert(pB.get() == pA.get()); |
| assert(!pB.owner_before(pA) && !pA.owner_before(pB)); |
| } |
| { |
| const std::shared_ptr<B[8]> pA; |
| std::shared_ptr<A[8]> pB = std::static_pointer_cast<A[8]>(pA); |
| assert(pB.get() == pA.get()); |
| assert(!pB.owner_before(pA) && !pA.owner_before(pB)); |
| } |
| #endif // TEST_STD_VER > 14 |
| #if TEST_STD_VER > 20 |
| { |
| A* pA_raw = new A; |
| std::shared_ptr<A> pA(pA_raw); |
| ASSERT_NOEXCEPT(std::static_pointer_cast<B>(std::move(pA))); |
| std::shared_ptr<B> pB = std::static_pointer_cast<B>(std::move(pA)); |
| assert(pA.get() == nullptr); |
| assert(pB.get() == pA_raw); |
| assert(pB.use_count() == 1); |
| } |
| #endif // TEST_STD_VER > 20 |
| |
| return 0; |
| } |