uint64_t as_uint64() const
void to_variant(const flat_set< T, A... > &var, variant &vo, uint32_t _max_depth)
stores null, int64, uint64, double, bool, string, std::vector<variant>, and variant_object's.
void from_variant(const variant &var, flat_set< T, A... > &vo, uint32_t _max_depth)