1// { dg-options "-std=gnu++11" } 2 3// Copyright (C) 2005-2015 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 25struct A { }; 26struct B : A { }; 27 28// 20.6.6.2.5 shared_ptr observers [util.smartptr.shared.obs] 29 30// use_count 31void 32test01() 33{ 34 bool test __attribute__((unused)) = true; 35 36 const std::shared_ptr<A> p1; 37 VERIFY( p1.use_count() == 0 ); 38 const std::shared_ptr<A> p2(p1); 39 VERIFY( p1.use_count() == 0 ); 40} 41 42void 43test02() 44{ 45 bool test __attribute__((unused)) = true; 46 47 std::shared_ptr<A> p1(new A); 48 std::shared_ptr<A> p2(p1); 49 p1.reset(); 50 VERIFY( p1.use_count() == 0 ); 51 VERIFY( p2.use_count() == 1 ); 52} 53 54void 55test03() 56{ 57 bool test __attribute__((unused)) = true; 58 59 std::shared_ptr<A> p1(new A); 60 std::shared_ptr<A> p2(p1); 61 p2.reset(new B); 62 VERIFY( p1.use_count() == 1 ); 63 VERIFY( p2.use_count() == 1 ); 64} 65 66 67int 68main() 69{ 70 test01(); 71 test02(); 72 test03(); 73 return 0; 74} 75