GLib.OptionError
Error codes returned by option parsing.
- OptionError.UNKNOWN_OPTION
An option was not known to the parser. This error will only be reported, if the parser hasn't been instructed to ignore unknown options, see GLib.OptionContext.prototype.set_ignore_unknown_options.
- OptionError.BAD_VALUE
A value couldn't be parsed.
- OptionError.FAILED
A GLib.OptionArgFunc callback failed.