[Haskell-cafe] Re: Re: A question regarding cmdargs package

Joachim Breitner wrote:

Am Dienstag, den 12.10.2010, 16:42 +1100 schrieb Ivan Lazar Miljenovic:

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On 12 October 2010 16:32, Magnus Therning wrote:

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This makes me curious. What's the use case where you want to allow the user to pass arguments on the command line, but you don't want that user to be able to use '--help' to find out what arguments may be passed?

When you don't want to bother defining the help options/descriptions? :p

note that people expect "cmd --help" to at least do nothing. So if your program is called "launchMissiles", please make it at least spit out a message like "your evil dictator was too lazy to write a help message" when it is called with --help.

(That is if you are sharing your program. Not sure if you should share "launchMissiles" at all.)

launchMissiles = putStrLn "Boom! (just kidding :)" BTW another cool feature of an auto-magic option parsing lib is the GNU standard "--" (arguments after this are not to be treated as options). Cheers Ben