2.7 Idiosyncrasies

Although Genparse has been designed to be as flexible as possible, it will always be more limited than manual command line parsing or using getopt (). In this section, we document some of the strange and unusual behavior of Genparse.

• In order to specify an option that only has a long form, you must specify the token "NONE" in place of the short option. For example

    NONE / longonly   flag
  

  specified a flag option that only has a long form (--longonly).

• The -h and -v options will always exist. Their default behavior can be overridden, but Genparse cannot create parsers without them. (See Genparse Options.)
• In a parser, the -h option will automatically call the usage function if and only if the long form of the option is --help. Otherwise, Genparse assumes that the user has overridden -h and treats it like any other option.
• For C output you must link in both the parser and the callback files. For C++ output, you only need to link in the parser file. See Parser File.