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0001 #ifndef DataFormats_Common_CMS_CLASS_VERSION_h
0002 #define DataFormats_Common_CMS_CLASS_VERSION_h
0003 // -*- C++ -*-
0004 //
0005 // Package:     Common
0006 // Class  :     CMS_CLASS_VERSION
0007 //
0008 /**\class CMS_CLASS_VERSION CMS_CLASS_VERSION.h DataFormats/Common/interface/CMS_CLASS_VERSION.h
0009 
0010  Description: Macro used to add versioning info needed by ROOT to a CMS templated class
0011 
0012  Usage:
0013     Add the following line to a template class' public declaration area
0014       CMS_CLASS_VERSION(<number>)
0015 
0016   For classes that have been stored into ROOT files before the addition of the macro, we suggest starting the <number> at 10. This was chosen to be larger than any known number of stored changes to a templated class.
0017   For new classes that have never been stored, we suggest starting the <number> at 2 (0 and 1 have special meanings to ROOT).
0018  
0019 */
0020 //
0021 // Original Author:  Chris Jones
0022 //         Created:  Thu Mar  3 14:25:29 CST 2011
0023 //
0024 
0025 // system include files
0026 
0027 // user include files
0028 
0029 // forward declarations
0030 #define CMS_CLASS_VERSION(_version_) \
0031   static short Class_Version() { return _version_; }
0032 
0033 #endif