CacheContexts.h

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#ifndef FWCore_Framework_stream_CacheContexts_h
#define FWCore_Framework_stream_CacheContexts_h
// -*- C++ -*-
//
// Package:     FWCore/Framework
// Class  :     CacheContexts
//
//
// Original Author:  Chris Jones
//         Created:  Fri, 02 Aug 2013 00:17:38 GMT
//

// system include files

// user include files
#include "FWCore/Framework/interface/moduleAbilities.h"

// forward declarations
namespace edm {
  namespace stream {
    namespace impl {
      struct Last {};

      template <typename T, typename... U>
      struct AbilityToCache : public AbilityToCache<U...> {};

      template <typename G, typename... U>
      struct AbilityToCache<GlobalCache<G>, U...> : public AbilityToCache<U...> {
        typedef G GlobalCache;
      };

      template <typename R, typename... U>
      struct AbilityToCache<RunCache<R>, U...> : public AbilityToCache<U...> {
        typedef R RunCache;
      };

      template <typename L, typename... U>
      struct AbilityToCache<LuminosityBlockCache<L>, U...> : public AbilityToCache<U...> {
        typedef L LuminosityBlockCache;
      };

      template <typename R, typename... U>
      struct AbilityToCache<RunSummaryCache<R>, U...> : public AbilityToCache<U...> {
        typedef R RunSummaryCache;
      };

      template <typename L, typename... U>
      struct AbilityToCache<LuminosityBlockSummaryCache<L>, U...> : public AbilityToCache<U...> {
        typedef L LuminosityBlockSummaryCache;
      };

      template <>
      struct AbilityToCache<Last> {
        typedef void GlobalCache;
        typedef void RunCache;
        typedef void LuminosityBlockCache;
        typedef void RunSummaryCache;
        typedef void LuminosityBlockSummaryCache;
      };

    }  // namespace impl
    template <typename... T>
    struct CacheContexts : public impl::AbilityToCache<T..., impl::Last> {};
  }  // namespace stream
}  // namespace edm

#endif