HashMap.h

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#pragma once
 
#include <GaudiKernel/Hash.h>
#include <GaudiKernel/Map.h>
#include <unordered_map>
 
namespace GaudiUtils {
 
  template <typename K, typename T, typename H = Hash<K>, typename M = std::unordered_map<K, T, H>>
  class HashMap : public Map<K, T, M> {
  public:
    typedef H     hasher;
    inline hasher hash_funct() const { return this->m_map.hash_funct(); }

    friend std::ostream& operator<<( std::ostream& s, const GaudiUtils::HashMap<K, T, H, M>& m ) {
      // Copy the hash map into a map to have it ordered by key.
      return s << GaudiUtils::Map<K, T>( m.begin(), m.end() );
    }
  };
 
} // namespace GaudiUtils