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Allow multiple +AGDA -AGDA blocks in cli arguments #45

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Allow multiple +AGDA -AGDA blocks in cli arguments #45

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19 changes: 13 additions & 6 deletions src/Options.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -129,13 +129,20 @@ stripRTS (arg : argv)
is x arg = [x] == take 1 (words arg)

-- | Extract Agda options (+AGDA ... -AGDA) from a list of options
--
-- >>> extractAgdaOpts [ "als1", "+AGDA", "agda1", "-AGDA", "als2", "+AGDA", "agda2" ]
-- (["als1","als2"],["agda1","agda2"])
extractAgdaOpts :: [String] -> ([String], [String])
extractAgdaOpts argv =
let (before, argv') = break (== "+AGDA") argv
(forAgda, after) = break (== "-AGDA") argv'
forALS = before ++ dropWhile (== "-AGDA") after
forAgda' = dropWhile (== "+AGDA") forAgda
in (forALS, forAgda')
extractAgdaOpts argv = go False argv
where
go False ("+AGDA":xs) = go True xs
go True ("-AGDA":xs) = go False xs
go inagda (arg:xs) =
let (forALS, forAgda) = go inagda xs in
if inagda
then (forALS, arg:forAgda)
else (arg:forALS, forAgda)
go _ [] = ([], [])

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