Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 1 | //===----------------------------------------------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | // <memory> |
| 11 | |
| 12 | // unique_ptr |
| 13 | |
| 14 | // Test unique_ptr move ctor |
| 15 | |
| 16 | #include <memory> |
| 17 | #include <cassert> |
| 18 | |
| 19 | // test move ctor. Should only require a MoveConstructible deleter, or if |
| 20 | // deleter is a reference, not even that. |
| 21 | |
| 22 | struct A |
| 23 | { |
| 24 | static int count; |
| 25 | A() {++count;} |
| 26 | A(const A&) {++count;} |
| 27 | ~A() {--count;} |
| 28 | }; |
| 29 | |
| 30 | int A::count = 0; |
| 31 | |
| 32 | template <class T> |
| 33 | class Deleter |
| 34 | { |
| 35 | int state_; |
| 36 | |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 37 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 38 | Deleter(const Deleter&); |
| 39 | Deleter& operator=(const Deleter&); |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 40 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 41 | Deleter(Deleter&); |
| 42 | Deleter& operator=(Deleter&); |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 43 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 44 | |
| 45 | public: |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 46 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 47 | Deleter(Deleter&& r) : state_(r.state_) {r.state_ = 0;} |
| 48 | Deleter& operator=(Deleter&& r) |
| 49 | { |
| 50 | state_ = r.state_; |
| 51 | r.state_ = 0; |
| 52 | return *this; |
| 53 | } |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 54 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 55 | operator std::__rv<Deleter>() {return std::__rv<Deleter>(*this);} |
| 56 | Deleter(std::__rv<Deleter> r) : state_(r->state_) {r->state_ = 0;} |
| 57 | Deleter& operator=(std::__rv<Deleter> r) |
| 58 | { |
| 59 | state_ = r->state_; |
| 60 | r->state_ = 0; |
| 61 | return *this; |
| 62 | } |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 63 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 64 | |
| 65 | Deleter() : state_(5) {} |
| 66 | |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 67 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 68 | template <class U> |
| 69 | Deleter(Deleter<U>&& d, |
| 70 | typename std::enable_if<!std::is_same<U, T>::value>::type* = 0) |
| 71 | : state_(d.state()) {d.set_state(0);} |
| 72 | |
| 73 | private: |
| 74 | template <class U> |
| 75 | Deleter(const Deleter<U>& d, |
| 76 | typename std::enable_if<!std::is_same<U, T>::value>::type* = 0); |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 77 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 78 | template <class U> |
| 79 | Deleter(Deleter<U> d, |
| 80 | typename std::enable_if<!std::is_same<U, T>::value>::type* = 0) |
| 81 | : state_(d.state()) {} |
Howard Hinnant | 73d21a4 | 2010-09-04 23:28:19 +0000 | [diff] [blame^] | 82 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
Howard Hinnant | c52f43e | 2010-08-22 00:59:46 +0000 | [diff] [blame] | 83 | public: |
| 84 | int state() const {return state_;} |
| 85 | void set_state(int i) {state_ = i;} |
| 86 | |
| 87 | void operator()(T* p) {delete p;} |
| 88 | }; |
| 89 | |
| 90 | class CDeleter |
| 91 | { |
| 92 | int state_; |
| 93 | |
| 94 | CDeleter(CDeleter&); |
| 95 | CDeleter& operator=(CDeleter&); |
| 96 | public: |
| 97 | |
| 98 | CDeleter() : state_(5) {} |
| 99 | |
| 100 | int state() const {return state_;} |
| 101 | void set_state(int s) {state_ = s;} |
| 102 | |
| 103 | void operator()(A* p) {delete p;} |
| 104 | }; |
| 105 | |
| 106 | int main() |
| 107 | { |
| 108 | { |
| 109 | std::unique_ptr<A> s(new A); |
| 110 | A* p = s.get(); |
| 111 | std::unique_ptr<A> s2 = std::move(s); |
| 112 | assert(s2.get() == p); |
| 113 | assert(s.get() == 0); |
| 114 | assert(A::count == 1); |
| 115 | } |
| 116 | assert(A::count == 0); |
| 117 | { |
| 118 | std::unique_ptr<A, Deleter<A> > s(new A); |
| 119 | A* p = s.get(); |
| 120 | std::unique_ptr<A, Deleter<A> > s2 = std::move(s); |
| 121 | assert(s2.get() == p); |
| 122 | assert(s.get() == 0); |
| 123 | assert(A::count == 1); |
| 124 | assert(s2.get_deleter().state() == 5); |
| 125 | assert(s.get_deleter().state() == 0); |
| 126 | } |
| 127 | assert(A::count == 0); |
| 128 | { |
| 129 | CDeleter d; |
| 130 | std::unique_ptr<A, CDeleter&> s(new A, d); |
| 131 | A* p = s.get(); |
| 132 | std::unique_ptr<A, CDeleter&> s2 = std::move(s); |
| 133 | assert(s2.get() == p); |
| 134 | assert(s.get() == 0); |
| 135 | assert(A::count == 1); |
| 136 | d.set_state(6); |
| 137 | assert(s2.get_deleter().state() == d.state()); |
| 138 | assert(s.get_deleter().state() == d.state()); |
| 139 | } |
| 140 | assert(A::count == 0); |
| 141 | } |