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#ifndef DataFormats_Common_AssociationMapKeyVal_h
#define DataFormats_Common_AssociationMapKeyVal_h
/*
*
* helper classes for AssociationMap
*
* \author Luca Lista, INFN
*
*
*/
#include "DataFormats/Provenance/interface/ProductID.h"
#include "FWCore/Utilities/interface/EDMException.h"
#include <utility>
namespace edm {
class EDProductGetter;
namespace helpers {
template <typename K, typename V>
struct KeyVal {
typedef K key_type;
typedef V value_type;
KeyVal() : key(), val() {}
KeyVal(const K& k, const V& v) : key(k), val(v) {}
template <typename K_, typename V_>
KeyVal(K_&& k, V_&& v) : key(std::forward<K_>(k)), val(std::forward<V_>(v)) {}
KeyVal(EDProductGetter const* getter) : key(ProductID(), getter), val(ProductID(), getter) {}
K key;
V val;
};
template <typename K>
struct Key {
typedef K key_type;
Key() {}
Key(const K& k) : key(k) {}
template <typename K_>
Key(K_&& k) : key(std::forward<K_>(k)) {}
Key(EDProductGetter const* getter) : key(ProductID(), getter) {}
K key;
};
/// throw if r hasn't the same id as rp
template <typename RP, typename R>
void checkRef(const RP& rp, const R& r) {
if (rp.id() != r.id()) {
Exception::throwThis(edm::errors::InvalidReference, "invalid reference");
}
}
} // namespace helpers
} // namespace edm
#endif
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