Hash.h

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/*---------------------------------------------------------------------\
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\---------------------------------------------------------------------*/
#ifndef ZYPP_BASE_HASH_H
#define ZYPP_BASE_HASH_H
 
#include <iosfwd>
#include <unordered_set>
#include <unordered_map>

#if defined(__cpp_modules) || defined(__clang__)
#define ZYPP_DEFINE_ID_HASHABLE(C)              \
namespace std {                                 \
  template<> struct hash<C>                     \
  {                                             \
    size_t operator()( const C & __s ) const    \
    { return __s.id(); }                        \
  };                                            \
}
#else
#define ZYPP_DEFINE_ID_HASHABLE(C)              \
namespace std {                                 \
  template<class Tp> struct hash;               \
  template<> struct hash<C>                     \
  {                                             \
    size_t operator()( const C & __s ) const    \
    { return __s.id(); }                        \
  };                                            \
}
#endif

namespace std
{
  template<class D>
  inline unordered_set<D> * rwcowClone( const std::unordered_set<D> * rhs )
  { return new std::unordered_set<D>( *rhs ); }

  template<class K, class V>
  inline std::unordered_map<K,V> * rwcowClone( const std::unordered_map<K,V> * rhs )
  { return new std::unordered_map<K,V>( *rhs ); }
} // namespace std
#endif // ZYPP_BASE_HASH_H