[Haskell] main::[String]->IO() ?
phubuh at phubuh.org
Mon Mar 22 22:31:49 EST 2004
Steffen Mazanek <s_mazanek at gmx.de> writes:
> Hello everybody,
> each time I write an application that makes use of command line arguments
> I have to copy&paste the code for dealing with these args to my program
> from a reference implementation, because it is so hard to remember.
> What do you think about changing the default type of main or providing
> an alternative, e.g., main_args, just like in C or Java?
> I think this would simplify everyday-programming a lot. Or are there
> any severe theoretical (semantical) problems (main is running in the IO
> monad either way)?
main_args :: [String] -> IO ()
main_args args = do foo args
main :: IO ()
main = do args <- getArgs
Frankly, I don't think there's a compelling reason to change main's
type or introduce a new entry point. Not that I don't think that
accepting a [String] is slightly more elegant.
Have you considered one of the more sophisticated high-level argument
Hugs & kisses,
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