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20 lines
491 B
C++
20 lines
491 B
C++
#ifndef MISC_HASH_H
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#define MISC_HASH_H
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#include <cstddef>
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#include <cstdint>
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#include <functional>
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namespace Misc
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{
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/// Implemented similar to the boost::hash_combine
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template <class Seed, class T>
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inline void hashCombine(Seed& seed, const T& v)
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{
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static_assert(sizeof(Seed) >= sizeof(std::size_t), "Resulting hash will be truncated");
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std::hash<T> hasher;
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seed ^= static_cast<Seed>(hasher(v) + 0x9e3779b9 + (seed<<6) + (seed>>2));
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}
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}
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#endif
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