typelookup.h

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#ifndef FWCore_Utilities_typelookup_h
#define FWCore_Utilities_typelookup_h
// -*- C++ -*-
//
// Package:     Utilities
// Class  :     typelookup
// 
//
// Original Author:  Chris Jones
//         Created:  Wed Jan 20 14:26:21 CST 2010
// $Id: typelookup.h,v 1.2 2010/01/25 23:17:59 chrjones Exp $
//

// system include files
#include <typeinfo>
#include <utility>

// user include files

namespace edm {
   class TypeIDBase;
   
   namespace typelookup
   {
       std::pair<const char*, const std::type_info*> findType(const char* iClassName);
      
      template <typename T>
      const char* className();

      template <typename T>
      const std::type_info& classTypeInfo();

      class NameRegistrar {
      public:
         NameRegistrar(const char* iTypeName,const std::type_info& iInfo);
      };
      
   }
}

#define TYPELOOKUP_METHODS(Tname) \
namespace edm { namespace typelookup { \
template<> const char* className< Tname >() \
{ return #Tname ; } \
template<> const std::type_info& classTypeInfo< Tname > () \
{ return typeid( Tname ); } } }


#define EDM_TYPELOOKUP_SYM(x,y) EDM_TYPELOOKUP_SYM2(x,y)
#define EDM_TYPELOOKUP_SYM2(x,y) x ## y

#define DEFINE_TYPELOOKUP_REGISTRATION(type) \
static edm::typelookup::NameRegistrar EDM_TYPELOOKUP_SYM(s_register , __LINE__ ) (edm::typelookup::className<type>(),typeid(type))

#define TYPELOOKUP_DATA_REG(_dataclass_) TYPELOOKUP_METHODS(_dataclass_) \
DEFINE_TYPELOOKUP_REGISTRATION(_dataclass_)


#endif