final/test/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/nullptr_t_deleter.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     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>

// shared_ptr

// template<class D> shared_ptr(nullptr_t, D d);

#include <memory>
#include <cassert>
#include "../test_deleter.h"

struct A
{
    static int count;

    A() {++count;}
    A(const A&) {++count;}
    ~A() {--count;}
};

int A::count = 0;

int main()
{
    {
    std::shared_ptr<A> p(nullptr, test_deleter<A>(3));
    assert(A::count == 0);
    assert(p.use_count() == 1);
    assert(p.get() == 0);
    test_deleter<A>* d = std::get_deleter<test_deleter<A> >(p);
    assert(test_deleter<A>::count == 1);
    assert(test_deleter<A>::dealloc_count == 0);
    assert(d);
    assert(d->state() == 3);
    }
    assert(A::count == 0);
    assert(test_deleter<A>::count == 0);
    assert(test_deleter<A>::dealloc_count == 1);
}