...This library is object-oriented and interaction occurs with it at a high level. Programmers can easily write their own parsers if none of the included parsers fit their tastes, but GNU Getopt-, Sun Microsystems- (ala Java), and DOS/Windows style command parsers are supported out of the box. Additionally, the parsing results provide a great deal of information: not only do they provide the captured options and excess arguments, but also provide access to strings which are putatively options but failed to capture.