Check for public dtors on base::RefCounted types

tools/clang/plugins/tests/base_refcounted.cpp

Index: tools/clang/plugins/tests/base_refcounted.cpp
diff --git a/tools/clang/plugins/tests/base_refcounted.cpp b/tools/clang/plugins/tests/base_refcounted.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..364a3e888cf09bf37a3360599ce3b8fc51a34770
--- /dev/null
+++ b/tools/clang/plugins/tests/base_refcounted.cpp
@@ -0,0 +1,72 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base_refcounted.h"
+
+#include <cstddef>
+
+namespace {
+
+// Unsafe; should error.
+class AnonymousDerivedProtectedToPublicInImpl
+    : public ProtectedRefCountedDtorInHeader {
+ public:
+  AnonymousDerivedProtectedToPublicInImpl() {}
+  ~AnonymousDerivedProtectedToPublicInImpl() {}
+};
+
+}  // namespace
+
+// Unsafe; should error.
+class PublicRefCountedDtorInImpl
+    : public base::RefCounted<PublicRefCountedDtorInImpl> {
+ public:
+  PublicRefCountedDtorInImpl() {}
+  ~PublicRefCountedDtorInImpl() {}
+
+ private:
+  friend class base::RefCounted<PublicRefCountedDtorInImpl>;
+};
+
+class Foo {
+ public:
+  class BarInterface {
+   protected:
+    virtual ~BarInterface() {}
+  };
+
+  typedef base::RefCounted<BarInterface> RefCountedBar;
+  typedef RefCountedBar AnotherTypedef;
+};
+
+class Baz {
+ public:
+  typedef typename Foo::AnotherTypedef MyLocalTypedef;
+};
+
+// Unsafe; should error.
+class UnsafeTypedefChainInImpl : public Baz::MyLocalTypedef {
+ public:
+  UnsafeTypedefChainInImpl() {}
+  ~UnsafeTypedefChainInImpl() {}
+};
+
+int main() {
+  PublicRefCountedDtorInHeader bad;
+  PublicRefCountedDtorInImpl also_bad;
+
+  ProtectedRefCountedDtorInHeader* protected_ok = NULL;
+  PrivateRefCountedDtorInHeader* private_ok = NULL;
+
+  DerivedProtectedToPublicInHeader still_bad;
+  PublicRefCountedThreadSafeDtorInHeader another_bad_variation;
+  AnonymousDerivedProtectedToPublicInImpl and_this_is_bad_too;
+  ImplicitDerivedProtectedToPublicInHeader bad_yet_again;
+  UnsafeTypedefChainInImpl and_again_this_is_bad;
+
+  WebKitPublicDtorInHeader ignored;
+  WebKitDerivedPublicDtorInHeader still_ignored;
+
+  return 0;
+}