1 // { dg-do run { target c++11 } } 2 3 // Copyright (C) 2005-2021 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // You should have received a copy of the GNU General Public License along 17 // with this library; see the file COPYING3. If not see 18 // <http://www.gnu.org/licenses/>. 19 20 // 20.6.6.2 Template class shared_ptr [util.smartptr.shared] 21 22 #include <memory> 23 #include <testsuite_hooks.h> 24 25 struct A { }; 26 27 // 20.6.6.2.5 shared_ptr observers [util.smartptr.shared.obs] 28 29 // conversion to bool 30 void test01()31test01() 32 { 33 const std::shared_ptr<A> p1; 34 VERIFY( static_cast<bool>(p1) == false ); 35 const std::shared_ptr<A> p2(p1); 36 VERIFY( static_cast<bool>(p2) == false ); 37 } 38 39 void test02()40test02() 41 { 42 std::shared_ptr<A> p1(new A); 43 VERIFY( static_cast<bool>(p1) ); 44 std::shared_ptr<A> p2(p1); 45 VERIFY( static_cast<bool>(p2) ); 46 p1.reset(); 47 VERIFY( !static_cast<bool>(p1) ); 48 VERIFY( static_cast<bool>(p2) ); 49 } 50 51 void test03()52test03() 53 { 54 std::shared_ptr<A> p1(new A); 55 std::shared_ptr<A> p2(p1); 56 p2.reset(new A); 57 VERIFY( static_cast<bool>(p1) ); 58 VERIFY( static_cast<bool>(p2) ); 59 } 60 61 62 int main()63main() 64 { 65 test01(); 66 test02(); 67 test03(); 68 return 0; 69 } 70