@brief return whether pointer points to the root document @sa https://json.nlohmann.me/api/json_pointer/empty/

@brief return whether value is a boolean @sa https://json.nlohmann.me/api/basic_json/is_boolean/

PUBXXX */

press() adds the specified key (printing, non-printing, or modifier) to the persistent key report and sends the report. Because of the way USB HID wo

set iterator to a defined past the end

! @param[in] j JSON value to serialize @param[in] use_count whether to use '#' prefixes (optimized format) @param[in] use_type wheth

@brief returns a const iterator to the first element @sa https://json.nlohmann.me/api/basic_json/cbegin/

4. navigate to a specific GUI in gui_list

@brief return whether value is a floating-point number @sa https://json.nlohmann.me/api/basic_json/is_number_float/

@brief return whether value is an integer number @sa https://json.nlohmann.me/api/basic_json/is_number_integer/

MESSAGE QUEUE */

release() takes the specified key out of the persistent key report and sends the report. This tells the OS the key is no longer pressed and that it s

set iterator to a defined beginning

! @brief unget current character (read it again on next get) We implement unget by setting variable next_unget to true. The input is not

@brief access specified array element with bounds checking @sa https://json.nlohmann.me/api/basic_json/at/

@brief return flattened JSON value @sa https://json.nlohmann.me/api/basic_json/flatten/

--- memory usage -----------------------------------------------------------

2. tab creation after sliding (called by tabview_tab_changed_event_cb())

! * @brief convert a byte to a uppercase hex representation * @param[in] byte byte to represent * @return representation ("00".."FF")

return whether the iterator is at end

@brief return whether value is an unsigned integer number @sa https://json.nlohmann.me/api/basic_json/is_number_unsigned/

! @brief determine system byte order @return true if and only if system's byte order is little endian @note from https://stackoverflow.com/a/1001328

! @brief post-increment (it++) @pre The iterator is initialized; i.e. `m_object != nullptr`. */

! @brief post-decrement (it--) @pre The iterator is initialized; i.e. `m_object != nullptr`. */