Function json_pointer

Source/external/json.hpp:13743–13745

@brief create JSON pointer @sa https://json.nlohmann.me/api/json_pointer/json_pointer/

	/// @brief create JSON pointer
	/// @sa https://json.nlohmann.me/api/json_pointer/json_pointer/
	explicit json_pointer(const string_t& s = "")
		: reference_tokens(split(s))
	{}

	/// @brief return a string representation of the JSON pointer
	/// @sa https://json.nlohmann.me/api/json_pointer/to_string/