:: String -> Maybe Int package:doctest-parallel

parseSeed :: String -> Maybe Int
doctest-parallel Test.DocTest.Internal.Options
Parse seed argument 
>>> parseSeed "--seed=6"
Just 6

>>> parseSeed "--seeeed=6"
Nothing
parseThreads :: String -> Maybe Int
doctest-parallel Test.DocTest.Internal.Options
Parse number of threads argument 
>>> parseThreads "-j6"
Just 6

>>> parseThreads "-j-2"
Nothing

>>> parseThreads "-jA"
Nothing