PARSE_OPT_OPTARG = 1,
PARSE_OPT_NOARG = 2,
PARSE_OPT_NONEG = 4,
+ PARSE_OPT_HIDDEN = 8,
};
struct option;
* PARSE_OPT_OPTARG: says that the argument is optionnal (not for BOOLEANs)
* PARSE_OPT_NOARG: says that this option takes no argument, for CALLBACKs
* PARSE_OPT_NONEG: says that this option cannot be negated
+ * PARSE_OPT_HIDDEN this option is skipped in the default usage, showed in
+ * the long one.
*
* `callback`::
* pointer to the callback to use for OPTION_CALLBACK.