xref: /external/libcxx/test/utilities/memory/unique.ptr/unique.ptr.single/unique.ptr.single.ctor/move_convert05.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <memory>

// unique_ptr

// Test unique_ptr converting move ctor

#include <memory>
#include <cassert>

#include "../../deleter.h"

// 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;

int main()
{
    {
    std::unique_ptr<B, Deleter<B> > s(new B, Deleter<B>(5));
    A* p = s.get();
    std::unique_ptr<A, Deleter<A> > s2 = std::move(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);
}