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60 lines
1.2 KiB
C++
60 lines
1.2 KiB
C++
#ifndef hash_hh_INCLUDED
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#define hash_hh_INCLUDED
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#include <type_traits>
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#include <functional>
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#include <cstddef>
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namespace Kakoune
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{
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size_t hash_data(const char* data, size_t len);
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template<typename... Type>
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size_t hash_value(const Type&... val)
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{
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static_assert(sizeof...(Type) == 1, "");
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return std::hash<Type...>()(val...);
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}
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template<typename Type>
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typename std::enable_if<std::is_enum<Type>::value, size_t>::type
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hash_value(const Type& val)
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{
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return hash_value((typename std::underlying_type<Type>::type)val);
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}
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template<typename Type>
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size_t hash_values(Type&& t)
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{
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return hash_value(std::forward<Type>(t));
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}
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template<typename Type, typename... RemainingTypes>
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size_t hash_values(Type&& t, RemainingTypes&&... rt)
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{
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size_t seed = hash_values(std::forward<RemainingTypes>(rt)...);
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return seed ^ (hash_value(std::forward<Type>(t)) + 0x9e3779b9 +
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(seed << 6) + (seed >> 2));
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}
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template<typename T1, typename T2>
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size_t hash_value(const std::pair<T1, T2>& val)
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{
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return hash_values(val.first, val.second);
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}
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template<typename Type>
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struct Hash
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{
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size_t operator()(const Type& val) const
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{
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return hash_value(val);
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}
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};
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}
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#endif // hash_hh_INCLUDED
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