| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <memory> |
| |
| // unique_ptr |
| |
| // Test unique_ptr converting move ctor |
| |
| #include <memory> |
| #include <utility> |
| #include <cassert> |
| |
| // test converting move ctor. Should only require a MoveConstructible deleter, or if |
| // deleter is a reference, not even that. |
| // Implicit version |
| |
| struct A |
| { |
| static int count; |
| A() {++count;} |
| A(const A&) {++count;} |
| virtual ~A() {--count;} |
| }; |
| |
| int A::count = 0; |
| |
| struct B |
| : public A |
| { |
| static int count; |
| B() {++count;} |
| B(const B&) {++count;} |
| virtual ~B() {--count;} |
| }; |
| |
| int B::count = 0; |
| |
| template <class T> |
| class Deleter |
| { |
| int state_; |
| |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| Deleter(const Deleter&); |
| Deleter& operator=(const Deleter&); |
| #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| Deleter(Deleter&); |
| Deleter& operator=(Deleter&); |
| #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| |
| public: |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| Deleter(Deleter&& r) : state_(r.state_) {r.state_ = 0;} |
| Deleter& operator=(Deleter&& r) |
| { |
| state_ = r.state_; |
| r.state_ = 0; |
| return *this; |
| } |
| #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| operator std::__rv<Deleter>() {return std::__rv<Deleter>(*this);} |
| Deleter(std::__rv<Deleter> r) : state_(r->state_) {r->state_ = 0;} |
| Deleter& operator=(std::__rv<Deleter> r) |
| { |
| state_ = r->state_; |
| r->state_ = 0; |
| return *this; |
| } |
| #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| |
| Deleter() : state_(5) {} |
| |
| #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| template <class U> |
| Deleter(Deleter<U>&& d, |
| typename std::enable_if<!std::is_same<U, T>::value>::type* = 0) |
| : state_(d.state()) {d.set_state(0);} |
| |
| private: |
| template <class U> |
| Deleter(const Deleter<U>& d, |
| typename std::enable_if<!std::is_same<U, T>::value>::type* = 0); |
| #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| template <class U> |
| Deleter(Deleter<U> d, |
| typename std::enable_if<!std::is_same<U, T>::value>::type* = 0) |
| : state_(d.state()) {} |
| #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
| public: |
| int state() const {return state_;} |
| void set_state(int i) {state_ = i;} |
| |
| void operator()(T* p) {delete p;} |
| }; |
| |
| int main() |
| { |
| { |
| const std::unique_ptr<B, Deleter<B> > s(new B); |
| A* p = s.get(); |
| std::unique_ptr<A, Deleter<A> > s2 = s; |
| assert(s2.get() == p); |
| assert(s.get() == 0); |
| assert(A::count == 1); |
| assert(B::count == 1); |
| assert(s2.get_deleter().state() == 5); |
| assert(s.get_deleter().state() == 0); |
| } |
| assert(A::count == 0); |
| assert(B::count == 0); |
| } |