diff --git a/moo/moocpp/gobjptr.h b/moo/moocpp/gobjptr.h
index b5a6bea1..1df18f72 100644
--- a/moo/moocpp/gobjptr.h
+++ b/moo/moocpp/gobjptr.h
@@ -32,8 +32,7 @@ public:
 
     ~ObjectPtr()
     {
-        if (m_p != nullptr)
-            g_object_unref(m_p);
+        reset();
     }
 
     ObjectPtr(FooObject* obj, ObjectMemPolicy policy)
@@ -65,6 +64,13 @@ public:
         return *m_p;
     }
 
+    void reset()
+    {
+        if (m_p != nullptr)
+            g_object_unref(m_p);
+        m_p = nullptr;
+    }
+
     FooObject* get() const
     {
         return m_p;
@@ -80,6 +86,12 @@ public:
         return ObjectPtr(obj, ObjectMemPolicy::CopyReference);
     }
 
+    ObjectPtr& operator=(nullptr_t)
+    {
+        reset();
+        return *this;
+    }
+
     ObjectPtr& operator=(const ObjectPtr& p)
     {
         if (this != &p)
@@ -102,6 +114,7 @@ public:
         p.m_p = nullptr;
         if (tmp != nullptr)
             g_object_unref(tmp);
+        return *this;
     }
 
     operator bool() const
diff --git a/moo/moocpp/gstr.h b/moo/moocpp/gstr.h
index 556d075a..402541be 100644
--- a/moo/moocpp/gstr.h
+++ b/moo/moocpp/gstr.h
@@ -85,6 +85,11 @@ public:
         return result;
     }
 
+    gstr dup() const
+    {
+        return take(m_p ? g_strdup(m_p) : nullptr); 
+    }
+
     gstr& operator=(const gstr& other)
     {
         if (this != &other)
diff --git a/moo/moocpp/moocpp.cmake b/moo/moocpp/moocpp.cmake
index efbaa04a..6f6092c8 100644
--- a/moo/moocpp/moocpp.cmake
+++ b/moo/moocpp/moocpp.cmake
@@ -2,4 +2,6 @@ SET(moocpp_sources
 	moocpp/moocpp.cmake
     moocpp/gobjptr.h
     moocpp/gstr.h
+    moocpp/moocpp.h
+    moocpp/util.h
 )
diff --git a/moo/moocpp/moocpp.h b/moo/moocpp/moocpp.h
new file mode 100644
index 00000000..1d43567e
--- /dev/null
+++ b/moo/moocpp/moocpp.h
@@ -0,0 +1,20 @@
+/*
+ *   moocpp.h
+ *
+ *   Copyright (C) 2004-2016 by Yevgen Muntyan <emuntyan@users.sourceforge.net>
+ *
+ *   This file is part of medit.  medit is free software; you can
+ *   redistribute it and/or modify it under the terms of the
+ *   GNU Lesser General Public License as published by the
+ *   Free Software Foundation; either version 2.1 of the License,
+ *   or (at your option) any later version.
+ *
+ *   You should have received a copy of the GNU Lesser General Public
+ *   License along with medit.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "moocpp/gobjptr.h"
+#include "moocpp/gstr.h"
+#include "moocpp/util.h"
diff --git a/moo/moocpp/util.h b/moo/moocpp/util.h
new file mode 100644
index 00000000..e768ec6c
--- /dev/null
+++ b/moo/moocpp/util.h
@@ -0,0 +1,30 @@
+/*
+ *   util.h
+ *
+ *   Copyright (C) 2004-2016 by Yevgen Muntyan <emuntyan@users.sourceforge.net>
+ *
+ *   This file is part of medit.  medit is free software; you can
+ *   redistribute it and/or modify it under the terms of the
+ *   GNU Lesser General Public License as published by the
+ *   Free Software Foundation; either version 2.1 of the License,
+ *   or (at your option) any later version.
+ *
+ *   You should have received a copy of the GNU Lesser General Public
+ *   License along with medit.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <algorithm>
+
+template<typename Container, typename Element>
+bool contains(const Container& container, const Element& element)
+{
+    return std::find(container.begin(), container.end(), element) != container.end();
+}
+
+template<typename Container, typename Element>
+void remove(Container& container, const Element& element)
+{
+    container.erase(std::remove(container.begin(), container.end(), element), container.end());
+}