27 lines
590 B
C++
27 lines
590 B
C++
#ifndef KDL_HASH_COMBINE_H_
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#define KDL_HASH_COMBINE_H_
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#include <functional>
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namespace KDL
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{
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/**
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* @brief Combine hash of object \p v to the \p seed
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* @param seed Seed to append the hash of \p v
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* @param v Object of which the hash should be appended to the seed
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*
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* Inspired by:
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* @link https://github.com/boostorg/multiprecision/blob/boost-1.79.0/include/boost/multiprecision/detail/hash.hpp#L35-L41
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*/
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template <class T>
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inline void hash_combine(std::size_t& seed, const T& v)
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{
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std::hash<T> hasher;
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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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