Event/DecayChain/include/DecayChain/Element/MakerTrait.h

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#ifndef DCHAIN_MAKERTRAIT_H
#define DCHAIN_MAKERTRAIT_H
// -*- C++ -*-
//
// Package:     <DChain>
// Module:      MakerTrait
//
/**\class MakerTrait MakerTrait.h DChain/MakerTrait.h
 
 Description: <one line class summary>
 
 Usage:
    <usage>
 
*/
//
// Author:      Chris D Jones
// Created:     Thu Jan  5 15:37:46 EST 2006
// $Id: MakerTrait.h,v 1.1.1.1 2009/03/03 06:06:56 maqm Exp $
//
// Revision history
//
// $Log: MakerTrait.h,v $
// Revision 1.1.1.1  2009/03/03 06:06:56  maqm
// first import of DecayChain
//
// Revision 1.1  2006/01/11 20:28:09  cdj
// massive class renaming, addition of [] for selection and unit tests
//
 
// system include files
 
// user include files
 
// forward declarations
namespace dchain {
  template <class T> struct NewMaker {
 
    typedef ReferenceHolderBase<T*, T&> result_type;
 
    template <class U> result_type operator()( const U& iU ) const {
      return result_type( new T( iU ) );
    }
  };
 
  template <class T> struct MakerTrait {
    typedef NewMaker<T> maker_type;
  };
 
  template <class T> struct ResultTypeTrait {
    typedef typename T::result_type type;
  };
 
  template <class TReturn, class TArg> struct ResultTypeTrait<TReturn ( * )( const TArg& )> {
    typedef TReturn type;
  };
 
} // namespace dchain
// inline function definitions
 
#endif /* DCHAIN_MAKERTRAIT_H */