diff --git a/src/functions.h b/src/functions.h
index 3733ad1..ab0086b 100755
--- a/src/functions.h
+++ b/src/functions.h
@@ -5,7 +5,7 @@
  */
 
 /* 
- * Copyright (c) 2007-2011, Tomasz Sowa
+ * Copyright (c) 2007-2012, Tomasz Sowa
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without
@@ -66,6 +66,8 @@ public:
 		std::wstring variable;		// used when type is 'variable'
 	};
 
+	typedef std::map<std::wstring, Function> FunctionsTable;
+	typedef typename FunctionsTable::iterator Iterator;
 
 
 	void Insert(const char * key, UserFunction ufunction);  // inserting a function
@@ -78,14 +80,15 @@ public:
 	void Insert(const std::wstring & key, const wchar_t * var);
 	void Insert(const std::wstring & key, const std::wstring & var);
 
-
 	bool Find(const std::string & key, Function ** fun);
 	bool Find(const std::wstring & key, Function ** fun);
-	void Clear();
+
+	Iterator Begin();
+	Iterator End();
 	size_t Size() const;
+	void Clear();
 	
 private:
-	typedef std::map<std::wstring, Function> FunctionsTable;
 	FunctionsTable functions_tab;
 	std::wstring temp_key;
 };
@@ -234,6 +237,19 @@ void Functions<StreamType>::Clear()
 }
 
 
+template<class StreamType>
+typename Functions<StreamType>::Iterator Functions<StreamType>::Begin()
+{
+	return functions_tab.begin();
+}
+
+
+template<class StreamType>
+typename Functions<StreamType>::Iterator Functions<StreamType>::End()
+{
+	return functions_tab.end();
+}
+
 
 template<class StreamType>
 size_t Functions<StreamType>::Size() const