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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.
//
//===----------------------------------------------------------------------===//
// <memory>
// weak_ptr
// template<class T> void swap(weak_ptr<T>& a, weak_ptr<T>& b)
#include <memory>
#include <cassert>
#include "test_macros.h"
struct A
{
static int count;
A() {++count;}
A(const A&) {++count;}
~A() {--count;}
};
int A::count = 0;
int main(int, char**)
{
{
A* ptr1 = new A;
A* ptr2 = new A;
std::shared_ptr<A> p1(ptr1);
std::weak_ptr<A> w1(p1);
{
std::shared_ptr<A> p2(ptr2);
std::weak_ptr<A> w2(p2);
swap(w1, w2);
assert(w1.use_count() == 1);
assert(w1.lock().get() == ptr2);
assert(w2.use_count() == 1);
assert(w2.lock().get() == ptr1);
assert(A::count == 2);
}
}
assert(A::count == 0);
return 0;
}
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