diff options
Diffstat (limited to 'lib/Language/Haskell/Stylish/Step/LanguagePragmas.hs')
| -rw-r--r-- | lib/Language/Haskell/Stylish/Step/LanguagePragmas.hs | 54 |
1 files changed, 24 insertions, 30 deletions
diff --git a/lib/Language/Haskell/Stylish/Step/LanguagePragmas.hs b/lib/Language/Haskell/Stylish/Step/LanguagePragmas.hs index cdedfa8..c9d461f 100644 --- a/lib/Language/Haskell/Stylish/Step/LanguagePragmas.hs +++ b/lib/Language/Haskell/Stylish/Step/LanguagePragmas.hs @@ -2,7 +2,6 @@ module Language.Haskell.Stylish.Step.LanguagePragmas ( Style (..) , step - -- * Utilities , addLanguagePragma ) where @@ -42,9 +41,9 @@ firstLocation = minimum . map (blockStart . fst) -------------------------------------------------------------------------------- -verticalPragmas :: Int -> Bool -> [String] -> Lines -verticalPragmas longest align pragmas' = - [ "{-# LANGUAGE " ++ pad pragma ++ " #-}" +verticalPragmas :: String -> Int -> Bool -> [String] -> Lines +verticalPragmas lg longest align pragmas' = + [ "{-# " ++ lg ++ " " ++ pad pragma ++ " #-}" | pragma <- pragmas' ] where @@ -54,27 +53,23 @@ verticalPragmas longest align pragmas' = -------------------------------------------------------------------------------- -compactPragmas :: Int -> [String] -> Lines -compactPragmas columns pragmas' = wrap columns "{-# LANGUAGE" 13 $ +compactPragmas :: String -> Maybe Int -> [String] -> Lines +compactPragmas lg columns pragmas' = wrapMaybe columns ("{-# " ++ lg) 13 $ map (++ ",") (init pragmas') ++ [last pragmas' ++ " #-}"] -------------------------------------------------------------------------------- -compactLinePragmas :: Int -> Bool -> [String] -> Lines -compactLinePragmas _ _ [] = [] -compactLinePragmas columns align pragmas' = map (wrapLanguage . pad) prags +compactLinePragmas :: String -> Maybe Int -> Bool -> [String] -> Lines +compactLinePragmas _ _ _ [] = [] +compactLinePragmas lg columns align pragmas' = map (wrapLanguage . pad) prags where - wrapLanguage ps = "{-# LANGUAGE" ++ ps ++ " #-}" - - maxWidth = columns - 16 - + wrapLanguage ps = "{-# " ++ lg ++ ps ++ " #-}" + maxWidth = fmap (\c -> c - 16) columns longest = maximum $ map length prags - pad | align = padRight longest | otherwise = id - - prags = map truncateComma $ wrap maxWidth "" 1 $ + prags = map truncateComma $ wrapMaybe maxWidth "" 1 $ map (++ ",") (init pragmas') ++ [last pragmas'] @@ -87,10 +82,10 @@ truncateComma xs -------------------------------------------------------------------------------- -prettyPragmas :: Int -> Int -> Bool -> Style -> [String] -> Lines -prettyPragmas _ longest align Vertical = verticalPragmas longest align -prettyPragmas cols _ _ Compact = compactPragmas cols -prettyPragmas cols _ align CompactLine = compactLinePragmas cols align +prettyPragmas :: String -> Maybe Int -> Int -> Bool -> Style -> [String] -> Lines +prettyPragmas lp _ longest align Vertical = verticalPragmas lp longest align +prettyPragmas lp cols _ _ Compact = compactPragmas lp cols +prettyPragmas lp cols _ align CompactLine = compactLinePragmas lp cols align -------------------------------------------------------------------------------- @@ -110,35 +105,34 @@ filterRedundant isRedundant' = snd . foldr filterRedundant' (S.empty, []) known' = xs' `S.union` known -------------------------------------------------------------------------------- -step :: Int -> Style -> Bool -> Bool -> Step -step = (((makeStep "LanguagePragmas" .) .) .) . step' +step :: Maybe Int -> Style -> Bool -> Bool -> String -> Step +step = ((((makeStep "LanguagePragmas" .) .) .) .) . step' -------------------------------------------------------------------------------- -step' :: Int -> Style -> Bool -> Bool -> Lines -> Module -> Lines -step' columns style align removeRedundant ls (module', _) +step' :: Maybe Int -> Style -> Bool -> Bool -> String -> Lines -> Module -> Lines +step' columns style align removeRedundant lngPrefix ls (module', _) | null pragmas' = ls | otherwise = applyChanges changes ls where isRedundant' | removeRedundant = isRedundant module' | otherwise = const False - pragmas' = pragmas $ fmap linesFromSrcSpan module' longest = maximum $ map length $ snd =<< pragmas' groups = [(b, concat pgs) | (b, pgs) <- groupAdjacent pragmas'] changes = - [ change b (const $ prettyPragmas columns longest align style pg) + [ change b (const $ prettyPragmas lngPrefix columns longest align style pg) | (b, pg) <- filterRedundant isRedundant' groups ] -------------------------------------------------------------------------------- -- | Add a LANGUAGE pragma to a module if it is not present already. -addLanguagePragma :: String -> H.Module H.SrcSpanInfo -> [Change String] -addLanguagePragma prag modu +addLanguagePragma :: String -> String -> H.Module H.SrcSpanInfo -> [Change String] +addLanguagePragma lg prag modu | prag `elem` present = [] - | otherwise = [insert line ["{-# LANGUAGE " ++ prag ++ " #-}"]] + | otherwise = [insert line ["{-# " ++ lg ++ " " ++ prag ++ " #-}"]] where pragmas' = pragmas (fmap linesFromSrcSpan modu) present = concatMap snd pragmas' @@ -158,7 +152,7 @@ isRedundant _ _ = False -- | Check if the ViewPatterns language pragma is redundant. isRedundantViewPatterns :: H.Module H.SrcSpanInfo -> Bool isRedundantViewPatterns m = null - [() | H.PViewPat _ _ _ <- everything m :: [H.Pat H.SrcSpanInfo]] + [() | H.PViewPat {} <- everything m :: [H.Pat H.SrcSpanInfo]] -------------------------------------------------------------------------------- |