The GetOpt_pp class provides the exceptions() methods (a setter and a getter), same as STL streams. In order to enable exception throwing, invoke exceptions(flags) with the proper flags:

• ios::failbit will throw an exception due to invalid format (i.e. expected int received string).
• ios::eofbit will throw an exception when: the option was not present (and no default value was specified), or there was no argument.

If you want to enable all the options at once, then just call the exceptions_all() method instead.

All the exceptions derive from GetOptEx, which in turns derives from std::exception. These exceptions are:

• ParsingErrorEx
• InvalidFormatEx
• ArgumentNotFoundEx
• TooManyArgumentsEx
• OptionNotFoundEx
• TooManyOptionsEx (only thrown by end_of_options() method)

//

Next: Querying the Environment Vars

Back to Table of Contents