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//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03
// <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.
// Explicit 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_;
Deleter(const Deleter&);
Deleter& operator=(const Deleter&);
public:
Deleter(Deleter&& r) : state_(r.state_) {r.state_ = 0;}
Deleter& operator=(Deleter&& r)
{
state_ = r.state_;
r.state_ = 0;
return *this;
}
Deleter() : state_(5) {}
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);
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;
std::unique_ptr<A, Deleter<A> > s2(s); // expected-error {{no matching constructor}}
}
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