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.obs/lock.pass.cpp

@@ -1 +1,58 @@
-//===----------------------------------------------------------------------===//
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <memory>
+
+// weak_ptr
+
+// shared_ptr<T> lock() const;
+
+#include <memory>
+#include <cassert>
+
+struct A
+{
+    static int count;
+
+    A() {++count;}
+    A(const A&) {++count;}
+    ~A() {--count;}
+};
+
+int A::count = 0;
+
+int main()
+{
+    {
+        std::weak_ptr<A> wp;
+        std::shared_ptr<A> sp = wp.lock();
+        assert(sp.use_count() == 0);
+        assert(sp.get() == 0);
+        assert(A::count == 0);
+    }
+    {
+        std::shared_ptr<A> sp0(new A);
+        std::weak_ptr<A> wp(sp0);
+        std::shared_ptr<A> sp = wp.lock();
+        assert(sp.use_count() == 2);
+        assert(sp.get() == sp0.get());
+        assert(A::count == 1);
+    }
+    assert(A::count == 0);
+    {
+        std::shared_ptr<A> sp0(new A);
+        std::weak_ptr<A> wp(sp0);
+        sp0.reset();
+        std::shared_ptr<A> sp = wp.lock();
+        assert(sp.use_count() == 0);
+        assert(sp.get() == 0);
+        assert(A::count == 0);
+    }
+    assert(A::count == 0);
+}