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diff --git a/src/stlplus/persistence/persistent_enum.tpp b/src/stlplus/persistence/persistent_enum.tpp
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+++ b/src/stlplus/persistence/persistent_enum.tpp
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+////////////////////////////////////////////////////////////////////////////////
+
+//   Author:    Andy Rushton
+//   Copyright: (c) Southampton University 1999-2004
+//              (c) Andy Rushton           2004-2009
+//   License:   BSD License, see ../docs/license.html
+
+////////////////////////////////////////////////////////////////////////////////
+
+#include "persistent_int.hpp"
+
+namespace stlplus
+{
+
+  ////////////////////////////////////////////////////////////////////////////////
+  // enumeration types
+
+  template<typename T>
+  void dump_enum(dump_context& context, const T& data)
+    throw(persistent_dump_failed)
+  {
+    dump_unsigned(context,(unsigned)data);
+  }
+
+  template<typename T>
+  void restore_enum(restore_context& context, T& data)
+    throw(persistent_restore_failed)
+  {
+    unsigned value = 0;
+    restore_unsigned(context, value);
+    data = (T)value;
+  }
+
+  ////////////////////////////////////////////////////////////////////////////////
+
+} // end namespace stlplus