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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <memory>
// weak_ptr
// void swap(weak_ptr& r);
#include <memory>
#include <cassert>
struct A
{
static int count;
A() {++count;}
A(const A&) {++count;}
~A() {--count;}
};
int A::count = 0;
int main()
{
{
std::shared_ptr<A> p1(new A);
std::weak_ptr<A> w1(p1);
assert(w1.use_count() == 1);
w1.reset();
assert(w1.use_count() == 0);
assert(p1.use_count() == 1);
}
assert(A::count == 0);
}
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