move_convert11.fail.cpp revision 73d21a4f0774d3fadab98e690619a359cfb160a3
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 converting move ctor 15 16#include <memory> 17#include <cassert> 18 19// test converting move ctor. Should only require a MoveConstructible deleter, or if 20// deleter is a reference, not even that. 21// Implicit version 22 23struct A 24{ 25 static int count; 26 A() {++count;} 27 A(const A&) {++count;} 28 virtual ~A() {--count;} 29}; 30 31int A::count = 0; 32 33struct B 34 : public A 35{ 36 static int count; 37 B() {++count;} 38 B(const B&) {++count;} 39 virtual ~B() {--count;} 40}; 41 42int B::count = 0; 43 44template <class T> 45class Deleter 46{ 47 int state_; 48 49#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 50 Deleter(const Deleter&); 51 Deleter& operator=(const Deleter&); 52#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 53 Deleter(Deleter&); 54 Deleter& operator=(Deleter&); 55#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 56 57public: 58#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 59 Deleter(Deleter&& r) : state_(r.state_) {r.state_ = 0;} 60 Deleter& operator=(Deleter&& r) 61 { 62 state_ = r.state_; 63 r.state_ = 0; 64 return *this; 65 } 66#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 67 operator std::__rv<Deleter>() {return std::__rv<Deleter>(*this);} 68 Deleter(std::__rv<Deleter> r) : state_(r->state_) {r->state_ = 0;} 69 Deleter& operator=(std::__rv<Deleter> r) 70 { 71 state_ = r->state_; 72 r->state_ = 0; 73 return *this; 74 } 75#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 76 77 Deleter() : state_(5) {} 78 79#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 80 template <class U> 81 Deleter(Deleter<U>&& d, 82 typename std::enable_if<!std::is_same<U, T>::value>::type* = 0) 83 : state_(d.state()) {d.set_state(0);} 84 85private: 86 template <class U> 87 Deleter(const Deleter<U>& d, 88 typename std::enable_if<!std::is_same<U, T>::value>::type* = 0); 89#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 90 template <class U> 91 Deleter(Deleter<U> d, 92 typename std::enable_if<!std::is_same<U, T>::value>::type* = 0) 93 : state_(d.state()) {} 94#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 95public: 96 int state() const {return state_;} 97 void set_state(int i) {state_ = i;} 98 99 void operator()(T* p) {delete p;} 100}; 101 102int main() 103{ 104 { 105 const std::unique_ptr<B, Deleter<B> > s(new B); 106 A* p = s.get(); 107 std::unique_ptr<A, Deleter<A> > s2 = s; 108 assert(s2.get() == p); 109 assert(s.get() == 0); 110 assert(A::count == 1); 111 assert(B::count == 1); 112 assert(s2.get_deleter().state() == 5); 113 assert(s.get_deleter().state() == 0); 114 } 115 assert(A::count == 0); 116 assert(B::count == 0); 117} 118