1 files changed, 1 insertions, 0 deletions
diff --git a/libcxx/test/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.spec/swap.pass.cpp b/libcxx/test/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.spec/swap.pass.cpp
new file mode 100644
index 00000000000..5f73c6fdbee
--- /dev/null
+++ b/libcxx/test/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.spec/swap.pass.cpp
@@ -0,0 +1 @@
+//===----------------------------------------------------------------------===//
+//
+// 适适适适适适适适适适The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// <memory>
+// shared_ptr
+// template<class T> void swap(shared_ptr<T>& a, shared_ptr<T>& b);
+#include <memory>
+#include <cassert>
+struct A
+{
+    static int count;
+    A() {++count;}
+    A(const A&) {++count;}
+    ~A() {--count;}
+};
+int A::count = 0;
+int main()
+{
+    {
+        A* ptr1 = new A;
+        A* ptr2 = new A;
+        std::shared_ptr<A> p1(ptr1);
+        {
+            std::shared_ptr<A> p2(ptr2);
+            swap(p1, p2);
+            assert(p1.use_count() == 1);
+            assert(p1.get() == ptr2);
+            assert(p2.use_count() == 1);
+            assert(p2.get() == ptr1);
+            assert(A::count == 2);
+        }
+        assert(p1.use_count() == 1);
+        assert(p1.get() == ptr2);
+        assert(A::count == 1);
+    }
+    assert(A::count == 0);
+    {
+        A* ptr1 = new A;
+        A* ptr2 = 0;
+        std::shared_ptr<A> p1(ptr1);
+        {
+            std::shared_ptr<A> p2;
+            swap(p1, p2);
+            assert(p1.use_count() == 0);
+            assert(p1.get() == ptr2);
+            assert(p2.use_count() == 1);
+            assert(p2.get() == ptr1);
+            assert(A::count == 1);
+        }
+        assert(p1.use_count() == 0);
+        assert(p1.get() == ptr2);
+        assert(A::count == 0);
+    }
+    assert(A::count == 0);
+    {
+        A* ptr1 = 0;
+        A* ptr2 = new A;
+        std::shared_ptr<A> p1;
+        {
+            std::shared_ptr<A> p2(ptr2);
+            swap(p1, p2);
+            assert(p1.use_count() == 1);
+            assert(p1.get() == ptr2);
+            assert(p2.use_count() == 0);
+            assert(p2.get() == ptr1);
+            assert(A::count == 1);
+        }
+        assert(p1.use_count() == 1);
+        assert(p1.get() == ptr2);
+        assert(A::count == 1);
+    }
+    assert(A::count == 0);
+    {
+        A* ptr1 = 0;
+        A* ptr2 = 0;
+        std::shared_ptr<A> p1;
+        {
+            std::shared_ptr<A> p2;
+            swap(p1, p2);
+            assert(p1.use_count() == 0);
+            assert(p1.get() == ptr2);
+            assert(p2.use_count() == 0);
+            assert(p2.get() == ptr1);
+            assert(A::count == 0);
+        }
+        assert(p1.use_count() == 0);
+        assert(p1.get() == ptr2);
+        assert(A::count == 0);
+    }
+    assert(A::count == 0);
+}
+\ No newline at end of file