20 lines
388 B
C
20 lines
388 B
C
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#ifndef VTR_HASH_H
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#define VTR_HASH_H
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#include <functional>
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namespace vtr {
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//Hashes v and combines it with seed (as in boost)
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//
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//This is typically used to implement std::hash for composite types.
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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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} //namespace
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#endif
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