4684ddb6aa
- import libcxx - reduce targets to the one when compiled as a tools Change-Id: Iabb8427f80ff8e89463559a28bcb8b4f2bdbc496
117 lines
2.9 KiB
C++
117 lines
2.9 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <memory>
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// unique_ptr
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// Test unique_ptr converting move ctor
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#include <memory>
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#include <cassert>
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// test converting move ctor. Should only require a MoveConstructible deleter, or if
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// deleter is a reference, not even that.
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// Implicit version
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struct A
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{
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static int count;
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A() {++count;}
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A(const A&) {++count;}
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virtual ~A() {--count;}
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};
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int A::count = 0;
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struct B
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: public A
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{
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static int count;
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B() {++count;}
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B(const B&) {++count;}
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virtual ~B() {--count;}
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};
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int B::count = 0;
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template <class T>
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class Deleter
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{
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int state_;
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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Deleter(const Deleter&);
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Deleter& operator=(const Deleter&);
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#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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Deleter(Deleter&);
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Deleter& operator=(Deleter&);
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#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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public:
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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Deleter(Deleter&& r) : state_(r.state_) {r.state_ = 0;}
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Deleter& operator=(Deleter&& r)
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{
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state_ = r.state_;
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r.state_ = 0;
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return *this;
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}
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#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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operator std::__rv<Deleter>() {return std::__rv<Deleter>(*this);}
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Deleter(std::__rv<Deleter> r) : state_(r->state_) {r->state_ = 0;}
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Deleter& operator=(std::__rv<Deleter> r)
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{
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state_ = r->state_;
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r->state_ = 0;
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return *this;
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}
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#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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Deleter() : state_(5) {}
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#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
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template <class U>
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Deleter(Deleter<U>&& d,
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typename std::enable_if<!std::is_same<U, T>::value>::type* = 0)
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: state_(d.state()) {d.set_state(0);}
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private:
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template <class U>
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Deleter(const Deleter<U>& d,
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typename std::enable_if<!std::is_same<U, T>::value>::type* = 0);
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#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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template <class U>
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Deleter(Deleter<U> d,
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typename std::enable_if<!std::is_same<U, T>::value>::type* = 0)
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: state_(d.state()) {}
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#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
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public:
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int state() const {return state_;}
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void set_state(int i) {state_ = i;}
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void operator()(T* p) {delete p;}
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};
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int main()
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{
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{
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const std::unique_ptr<B, Deleter<B> > s(new B);
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A* p = s.get();
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std::unique_ptr<A, Deleter<A> > s2 = s;
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assert(s2.get() == p);
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assert(s.get() == 0);
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assert(A::count == 1);
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assert(B::count == 1);
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assert(s2.get_deleter().state() == 5);
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assert(s.get_deleter().state() == 0);
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}
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assert(A::count == 0);
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assert(B::count == 0);
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}
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