EDGetToken.h

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#ifndef FWCore_Utilities_EDGetToken_h
#define FWCore_Utilities_EDGetToken_h
// -*- C++ -*-
//
// Package:     FWCore/Utilities
// Class  :     EDGetToken
//
//
// Original Author:  Chris Jones
//         Created:  Wed, 03 Apr 2013 17:54:11 GMT
//
 
// system include files
 
// user include files
 
// forward declarations
namespace edm {
  class EDConsumerBase;
  template <typename T>
  class EDGetTokenT;
 
  class EDGetToken {
    friend class EDConsumerBase;
 
  public:
    EDGetToken() : m_value{s_uninitializedValue} {}
 
    template <typename T>
    EDGetToken(EDGetTokenT<T> iOther) : m_value{iOther.m_value} {}
 
    // ---------- const member functions ---------------------
    unsigned int index() const { return m_value; }
    bool isUninitialized() const { return m_value == s_uninitializedValue; }
 
  private:
    //for testing
    friend class TestEDGetToken;
 
    static const unsigned int s_uninitializedValue = 0xFFFFFFFF;
 
    explicit EDGetToken(unsigned int iValue) : m_value(iValue) {}
 
    // ---------- member data --------------------------------
    unsigned int m_value;
  };
 
  template <typename T>
  class EDGetTokenT {
    friend class EDConsumerBase;
    friend class EDGetToken;
 
  public:
    EDGetTokenT() : m_value{s_uninitializedValue} {}
 
    // ---------- const member functions ---------------------
    unsigned int index() const { return m_value; }
    bool isUninitialized() const { return m_value == s_uninitializedValue; }
 
  private:
    //for testing
    friend class TestEDGetToken;
 
    static const unsigned int s_uninitializedValue = 0xFFFFFFFF;
 
    explicit EDGetTokenT(unsigned int iValue) : m_value(iValue) {}
 
    // ---------- member data --------------------------------
    unsigned int m_value;
  };
}  // namespace edm
 
#endif