hash_combine.h

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#ifndef KDL_HASH_COMBINE_H_
#define KDL_HASH_COMBINE_H_
 
#include <functional>
 
namespace KDL
{
 
template <class T>
inline void hash_combine(std::size_t& seed, const T& v)
{
  std::hash<T> hasher;
  seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
}
 
}
 
#endif