return the key of an object iterator

@brief returns the maximum possible number of elements @sa https://json.nlohmann.me/api/basic_json/max_size/

@brief applies a JSON Merge Patch @sa https://json.nlohmann.me/api/basic_json/merge_patch/

! @brief returns x * y @note The result is rounded. (Only the upper q bits are returned.) */

! @brief check if the next byte(s) are inside a given range Adds the current byte and, for each passed range, reads a new byte and checks

! @brief normalize x such that the significand is >= 2^(q-1) @pre x.f != 0 */

! @brief normalize x such that the result has the exponent E @pre e >= x.e and the upper e - x.e bits of x.f must be zero. */