hash.h

#pragma once
 
#include <cstddef>
#include <functional>
 
namespace raft::impl
{
    template<class T>
    void hashCombine(std::size_t& seed, const T& v)
    {
        std::hash<T> hasher;
        seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
    }
 
}  // namespace raft::impl