1//===----------------------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is dual licensed under the MIT and the University of Illinois Open 6// Source Licenses. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// libc++ cannot safely provide the auto_ptr constructor without rvalue 11// references. 12// REQUIRES: c++11 || c++14 13 14// <memory> 15 16// unique_ptr 17 18// template <class U> unique_ptr(auto_ptr<U>&&) noexcept 19 20#include <memory> 21#include <utility> 22#include <cassert> 23 24#include "test_macros.h" 25 26struct A 27{ 28 static int count; 29 A() {++count;} 30 A(const A&) {++count;} 31 virtual ~A() {--count;} 32}; 33 34int A::count = 0; 35 36struct B 37 : public A 38{ 39 static int count; 40 B() {++count;} 41 B(const B&) {++count;} 42 virtual ~B() {--count;} 43}; 44 45int B::count = 0; 46 47int main() 48{ 49 { 50 B* p = new B; 51 std::auto_ptr<B> ap(p); 52 std::unique_ptr<A> up(std::move(ap)); 53 assert(up.get() == p); 54 assert(ap.get() == 0); 55 assert(A::count == 1); 56 assert(B::count == 1); 57 } 58 assert(A::count == 0); 59 assert(B::count == 0); 60 { 61 B* p = new B; 62 std::auto_ptr<B> ap(p); 63 std::unique_ptr<A> up; 64 up = std::move(ap); 65 assert(up.get() == p); 66 assert(ap.get() == 0); 67 assert(A::count == 1); 68 assert(B::count == 1); 69 } 70 assert(A::count == 0); 71 assert(B::count == 0); 72#if TEST_STD_VER >= 11 73 { 74 static_assert(std::is_nothrow_constructible< 75 std::unique_ptr<A>, 76 std::auto_ptr<B>&& 77 >::value, ""); 78 } 79#endif 80} 81