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+/* vim: set sw=4 sts=4 et foldmethod=syntax : */
+
+/*
+ * Copyright (c) 2005, 2006 Ciaran McCreesh <ciaran.mccreesh@blueyonder.co.uk>
+ *
+ * This file is part of the Paludis package manager. Paludis is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU General
+ * Public License version 2, as published by the Free Software Foundation.
+ *
+ * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+ * Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef PALUDIS_GUARD_PALUDIS_CONTAINER_ENTRY_HH
+#define PALUDIS_GUARD_PALUDIS_CONTAINER_ENTRY_HH 1
+
+#include <list>
+
+/** \file
+ * Declarations for the ContainerEntry class.
+ *
+ * \ingroup grpcontainerentries
+ */
+
+namespace paludis
+{
+ /**
+ * Hold an entry in a container for as long as our ContainerEntry instance
+ * is in scope (RAII, see \ref EffCpp item 13 or \ref TCppPL section 14.4).
+ *
+ * \ingroup grpcontainerentries
+ */
+ template <typename Container_>
+ struct ContainerEntry;
+
+ /**
+ * Hold an entry in a container for as long as our ContainerEntry instance
+ * is in scope (RAII, see \ref EffCpp item 13 or \ref TCppPL section 14.4;
+ * partial specialisation for std::list).
+ *
+ * \ingroup grpcontainerentries
+ */
+ template <typename Item_>
+ class ContainerEntry<std::list<Item_> >
+ {
+ private:
+ std::list<Item_> * const _list;
+
+ typename std::list<Item_>::iterator _item;
+
+ public:
+ /**
+ * Constructor.
+ */
+ ContainerEntry(std::list<Item_> * const list, const Item_ & item) :
+ _list(list),
+ _item(list->insert(list->begin(), item))
+ {
+ }
+
+ /**
+ * Destructor.
+ */
+ ~ContainerEntry()
+ {
+ _list->erase(_item);
+ }
+ };
+}
+
+#endif