add Register.h

git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@597 7ec92016-0320-0410-acc4-a06ded1c099a

include/loki/Register.h

@@ -0,0 +1,122 @@
+////////////////////////////////////////////////////////////////////////////////
+// The Loki Library
+// Copyright (c) 2006 Peter Kümmel
+// Permission to use, copy, modify, distribute and sell this software for any 
+//     purpose is hereby granted without fee, provided that the above copyright 
+//     notice appear in all copies and that both that copyright notice and this 
+//     permission notice appear in supporting documentation.
+// The author makes no representations about the 
+//     suitability of this software for any purpose. It is provided "as is" 
+//     without express or implied warranty.
+////////////////////////////////////////////////////////////////////////////////
+#ifndef LOKI_REGISTER_INC_
+#define LOKI_REGISTER_INC_
+
+// $Header$ 
+
+#include "TypeManip.h"
+#include "HierarchyGenerators.h"
+
+///  \defgroup RegisterGroup Register 
+
+namespace Loki
+{
+
+	////////////////////////////////////////////////////////////////////////////////
+	//
+	//  Helper classes/functions for RegisterByCreateSet
+	//
+	////////////////////////////////////////////////////////////////////////////////
+
+	////////////////////////////////////////////////////////////////////////////////
+	///  \ingroup Register
+	///  Must be specialized be the user
+	////////////////////////////////////////////////////////////////////////////////
+	template<class t> bool RegisterFunction();
+
+	////////////////////////////////////////////////////////////////////////////////
+	///  \ingroup Register
+	///  Must be specialized be the user
+	////////////////////////////////////////////////////////////////////////////////
+	template<class t> bool UnRegisterFunction();
+
+	namespace Private
+	{
+		template<class T> 
+		struct RegisterOnCreate
+		{
+			RegisterOnCreate()  { RegisterFunction<T>(); }
+		};
+
+		template<class T> 
+		struct UnRegisterOnDelete
+		{
+			~UnRegisterOnDelete() { UnRegisterFunction<T>(); }
+		};	
+
+		template<class T>
+		struct RegisterOnCreateElement
+		{
+			RegisterOnCreate<T> registerObj;
+		};
+
+		template<class T>
+		struct UnRegisterOnDeleteElement
+		{
+			UnRegisterOnDelete<T> unregisterObj;
+		};
+	}
+
+	////////////////////////////////////////////////////////////////////////////////
+	///  \class RegisterOnCreateSet
+	///
+	///  \ingroup Register
+	///  Implements a generic register class which registers classes of a typelist
+	///
+	///  \par Usage
+	///  see test/Register
+	////////////////////////////////////////////////////////////////////////////////
+
+	template<typename ElementList>
+	struct RegisterOnCreateSet 
+		: GenScatterHierarchy<ElementList, Private::RegisterOnCreateElement>
+	{};
+
+	////////////////////////////////////////////////////////////////////////////////
+	///  \class UnRegisterOnDeleteSet
+	///
+	///  \ingroup Register
+	///  Implements a generic register class which unregisters classes of a typelist
+	///
+	///  \par Usage
+	///  see test/Register
+	////////////////////////////////////////////////////////////////////////////////
+	template<typename ElementList>
+	struct UnRegisterOnDeleteSet 
+		: GenScatterHierarchy<ElementList, Private::UnRegisterOnDeleteElement>
+	{};
+
+
+	////////////////////////////////////////////////////////////////////////////////
+	///  \def  LOKI_CHECK_CLASS_IN_LIST( CLASS , LIST )
+	///
+	///  \ingroup Register
+	///  Check if CLASS is in the typelist LIST.
+	///
+	///  \par Usage
+	///  see test/Register
+	////////////////////////////////////////////////////////////////////////////////
+
+#define LOKI_CHECK_CLASS_IN_LIST( CLASS , LIST )								\
+																				\
+	struct Loki_##CLASS##LIST_OK{typedef int class_##CLASS##_is_not_in_##LIST;};\
+	typedef Loki::Select<Loki::TL::IndexOf<LIST, CLASS>::value == -1,			\
+	CLASS,Loki_##CLASS##LIST_OK >::Result IsInList##CLASS##LIST;				\
+	typedef IsInList##CLASS##LIST::class_##CLASS##_is_not_in_##LIST				\
+													isInListTest##CLASS##LIST;
+
+} // namespace Loki
+
+
+#endif
+