| // { dg-options "-std=gnu++2a" } |
| // { dg-do run { target c++2a } } |
| |
| // Copyright (C) 2019 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // Template class shared_ptr [util.smartptr.shared] |
| |
| #include <memory> |
| #include <testsuite_hooks.h> |
| |
| struct A |
| { |
| A() : i() { } |
| virtual ~A() { } |
| int i; |
| }; |
| |
| struct B : A |
| { |
| B() : A(), a() { } |
| virtual ~B() { } |
| A a; |
| }; |
| |
| void deletefunc(A* p) { delete p; } |
| |
| // 20.6.6.2.1 shared_ptr constructors [util.smartptr.shared.const] |
| |
| // Aliasing constructors |
| |
| void |
| test01() |
| { |
| bool test = true; |
| |
| std::shared_ptr<A> a; |
| std::shared_ptr<bool> b1(std::move(a), &test); |
| VERIFY( b1.use_count() == 0 ); |
| VERIFY( b1.get() == &test ); |
| VERIFY( a.use_count() == 0 ); |
| VERIFY( a == nullptr ); |
| |
| std::shared_ptr<bool> b2(b1); |
| VERIFY( b2.use_count() == 0 ); |
| VERIFY( b1 == b2 ); |
| } |
| |
| void |
| test02() |
| { |
| std::shared_ptr<A> a(new A); |
| std::shared_ptr<int> i1(std::move(a), &a->i); |
| VERIFY( i1.use_count() == 1 ); |
| VERIFY( i1 != nullptr ); |
| VERIFY( a.use_count() == 0 ); |
| VERIFY( a == nullptr ); |
| |
| std::shared_ptr<int> i2(i1); |
| VERIFY( i2.use_count() == 2 ); |
| VERIFY( i2.get() == &a->i ); |
| } |
| |
| void |
| test03() |
| { |
| std::shared_ptr<B> b1(new B); |
| std::shared_ptr<B> b2(b1); |
| std::shared_ptr<A> a1(std::move(b1), b1.get()); |
| std::shared_ptr<A> a2(b2, &b2->a); |
| VERIFY( a2.use_count() == 2 ); |
| VERIFY( a1 != nullptr ); |
| VERIFY( a2 != nullptr ); |
| VERIFY( a1 != a2 ); |
| VERIFY( b1.use_count() == 0 ); |
| VERIFY( b2.use_count() == 0 ); |
| VERIFY( b1 == nullptr ); |
| VERIFY( b2 == nullptr ); |
| } |
| |
| int |
| main() |
| { |
| test01(); |
| test02(); |
| test03(); |
| } |