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Codechange: Implementation of std::hash for StrongType::Typedef

pull/13264/head
SamuXarick 2025-01-05 14:36:29 +00:00
parent ae1f469aac
commit 7ddbd1643e
1 changed files with 27 additions and 0 deletions
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27
src/core/strong_typedef_type.hpp
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@ -158,4 +158,31 @@ namespace StrongType {
}; };
} }
/**
* Implementation of std::hash for StrongType::Typedef.
*
* This specialization of std::hash allows hashing of StrongType::Typedef instances
* by leveraging the hash of the base type.
*
* Example Usage:
* using MyType = StrongType::Typedef<int, struct MyTypeTag>;
* std::unordered_map<MyType, std::string> my_map;
*
* @tparam TBaseType The underlying type of the StrongType::Typedef.
* @tparam TProperties Additional properties for the StrongType::Typedef.
*/
template <typename TBaseType, typename... TProperties>
struct std::hash<StrongType::Typedef<TBaseType, TProperties...>> {
/**
* Computes the hash value for a StrongType::Typedef instance.
*
* @param t The StrongType::Typedef instance to hash.
* @return The hash value of the base type of t.
*/
std::size_t operator()(const StrongType::Typedef<TBaseType, TProperties...> &t) const noexcept
{
return std::hash<TBaseType>()(t.base());
}
};
#endif /* STRONG_TYPEDEF_TYPE_HPP */ #endif /* STRONG_TYPEDEF_TYPE_HPP */