| definition: |
processOptions :: String -> [String] -> IO (ICOptions,[String])
processOptions banner argv = do
let (funopts, args, opterrors) = getOpt Permute options argv
opts = foldl (flip id) defaultICOptions funopts
unless (null opterrors)
(putStr (unlines opterrors) >> printUsage >> exitWith 1)
when (optHelp opts) (printUsage >> exitWith 0)
when (not (null (optMain opts)) && not (optLift opts)) $ error
"Incompatible options: interpreter requires case/let lifting!"
let out = optOutput opts
opts1 <- if null out || out == "-" then return opts
else do aout <- getAbsolutePath out
return opts { optOutput = aout }
return (opts1, args)
where
printUsage = putStrLn (banner ++ "\n" ++ usageText)
|
| demand: |
no demanded arguments |
| deterministic: |
deterministic operation |
| documentation: |
------------------------------------------------------------------------------ --- Process the actual command line argument and return the options --- and the name of the main program. |
| failfree: |
<FAILING> |
| indeterministic: |
referentially transparent operation |
| infix: |
no fixity defined |
| iotype: |
{(_,_) |-> _}
|
| name: |
processOptions |
| precedence: |
no precedence defined |
| result-values: |
_ |
| signature: |
String -> [String] -> Prelude.IO (ICOptions, [String]) |
| solution-complete: |
operation might suspend on free variables |
| terminating: |
possibly non-terminating |
| totally-defined: |
possibly non-reducible on same data term |