Wed Mar 12 04:10:47 PDT 2008 [EMAIL PROTECTED]
* System.Console.GetOpt mistakenly rejects options as ambiguous.
From "Eelis van der Weegen" <[EMAIL PROTECTED]>.
Testcase:
> import System.Console.GetOpt
>
> type Color = String
>
> optsDesc :: [OptDescr Color]
> optsDesc = [Option "" ["color", "colour"]
> (ReqArg id "color") "Foreground color"]
>
> main = do
> let args = ["--col=blue"]
> case getOpt RequireOrder optsDesc args of
> (_, _, err:_) -> putStrLn err
> _ -> return ()
Output:
option `--col' is ambiguous; could be one of:
--color=color, --colour=color Foreground color
--color=color, --colour=color Foreground color
This error is silly, because the two alternatives listed are the same
option. The problem is caused by incorrect use of a generator in a list
comprehension.
M ./System/Console/GetOpt.hs -2 +3
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