Fixing whitespace problems

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@111767 91177308-0d34-0410-b5e6-96231b3b80d8

test/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.weak.spec/swap.pass.cpp

@@ -1 +1,49 @@
-//===----------------------------------------------------------------------===//
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. 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>
+
+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::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);
+}