TypeToGet.h

Go to the documentation of this file.

#ifndef FWCore_Utilities_TypeToGet_h
#define FWCore_Utilities_TypeToGet_h
// -*- C++ -*-
//
// Package:     FWCore/Utilities
// Class  :     TypeToGet
//
//
// Original Author:  Chris Jones
//         Created:  Sat, 06 Apr 2013 14:45:01 GMT
//

// system include files

// user include files
#include "FWCore/Utilities/interface/TypeID.h"
#include "FWCore/Utilities/interface/ProductKindOfType.h"

// forward declarations
namespace edm {
  template <typename T>
  class View;

  class TypeToGet {
  public:
    TypeToGet(TypeID const& iID, KindOfType iKind) : m_type(iID), m_kind(iKind) {}

    // ---------- const member functions ---------------------
    TypeID const& type() const { return m_type; }
    KindOfType kind() const { return m_kind; }

    // ---------- static member functions --------------------
    template <typename T>
    static TypeToGet make() {
      return TypeToGet(edm::TypeID(typeIdFor(static_cast<T*>(nullptr))), kindOfTypeFor(static_cast<T*>(nullptr)));
    }

  private:
    template <typename T>
    static std::type_info const& typeIdFor(T*) {
      return typeid(T);
    }

    template <typename T>
    static std::type_info const& typeIdFor(edm::View<T>*) {
      return typeid(T);
    }

    template <typename T>
    static KindOfType kindOfTypeFor(T*) {
      return PRODUCT_TYPE;
    }

    template <typename T>
    static KindOfType kindOfTypeFor(edm::View<T>*) {
      return ELEMENT_TYPE;
    }

    TypeToGet() = delete;

    // ---------- member data --------------------------------
    TypeID m_type;
    KindOfType m_kind;
  };
}  // namespace edm

#endif