GOptionArg

The GOptionArg enum values determine which type of extra argument the options expect to find. If an option expects an extra argument, it can be specified in several ways; with a short option: -x arg, with a long option: --name arg or combined in a single argument: --name=arg. G_OPTION_ARG_NONE No extra argument. This is useful for simple flags. G_OPTION_ARG_STRING The option takes a string argument. G_OPTION_ARG_INT The option takes an integer argument. G_OPTION_ARG_CALLBACK The option provides a callback to parse the extra argument. G_OPTION_ARG_FILENAME The option takes a filename as argument. G_OPTION_ARG_STRING_ARRAY The option takes a string argument, multiple uses of the option are collected into an array of strings. G_OPTION_ARG_FILENAME_ARRAY The option takes a filename as argument, multiple uses of the option are collected into an array of strings. G_OPTION_ARG_DOUBLE The option takes a double argument. The argument can be formatted either for the user's locale or for the "C" locale. Since 2.12 G_OPTION_ARG_INT64 The option takes a 64-bit integer. Like G_OPTION_ARG_INT but for larger numbers. The number can be in decimal base, or in hexadecimal (when prefixed with 0x, for example, 0xffffffff). Since 2.12