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make uuid_t hashable

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Fabian Posch 2024-01-09 14:38:32 -05:00
parent 7dc1ba4a6d
commit eb832213a0
1 changed files with 11 additions and 0 deletions
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11
include/db_lib/db_types.hpp
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@ -117,6 +117,17 @@ struct is_map_key_type_same_as_enum {
}; };
// hash operator to be able use uuid_t as a hashmap key
template<>
struct std::hash<db::uuid_t> {
std::size_t operator()(const db::uuid_t& k) const {
using std::size_t;
using std::hash;
return hash<size_t>()(hash<uint64_t>()(k.uuid_upper) ^ hash<uint64_t>()(k.uuid_lower));
}
};
/** /**
* @brief Generate type conversion for enum class macros in the libpqxx library * @brief Generate type conversion for enum class macros in the libpqxx library