File: hash_combine.h

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#pragma once

#include <cstddef>

#include <functional>

namespace boost {

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);
}

}