1 // { dg-do run { target c++14 } } 2 3 // Copyright (C) 2015-2018 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 #include <experimental/memory> 21 #include <testsuite_hooks.h> 22 #include <utility> 23 24 using std::experimental::observer_ptr; 25 26 struct B {}; 27 struct D : B {}; 28 test01()29void test01() 30 { 31 observer_ptr<int> a; 32 VERIFY(!a); 33 observer_ptr<int> b{nullptr}; 34 VERIFY(!b); 35 } 36 test02()37void test02() 38 { 39 int x{}; 40 observer_ptr<int> a{&x}; 41 observer_ptr<int> b{a}; 42 VERIFY(a == b); 43 } 44 test03()45void test03() 46 { 47 int x{}; 48 observer_ptr<int> a; 49 observer_ptr<const int> b{a}; 50 VERIFY(a == b); 51 } 52 test04()53void test04() 54 { 55 D x{}; 56 observer_ptr<D> a{&x}; 57 observer_ptr<B> b{a}; 58 VERIFY(a == b); 59 } 60 test05()61void test05() 62 { 63 D x{}; 64 observer_ptr<D> a{&x}; 65 observer_ptr<B> b{std::move(a)}; 66 VERIFY(a == b); 67 } 68 test06()69void test06() 70 { 71 static constexpr D x{}; 72 constexpr observer_ptr<const D> a{&x}; 73 constexpr observer_ptr<const B> b{std::move(a)}; 74 VERIFY(a == b); 75 constexpr observer_ptr<const B> c{a}; 76 VERIFY(a == b && a == c && b == c); 77 constexpr observer_ptr<int> d; 78 constexpr observer_ptr<int> e{nullptr}; 79 VERIFY(!d); 80 VERIFY(!e); 81 } 82 main()83int main() 84 { 85 test01(); 86 test02(); 87 test03(); 88 test04(); 89 test05(); 90 test06(); 91 } 92