diff options
Diffstat (limited to 'lib/Language/Haskell/Stylish/Step/SimpleAlign.hs')
| -rw-r--r-- | lib/Language/Haskell/Stylish/Step/SimpleAlign.hs | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/lib/Language/Haskell/Stylish/Step/SimpleAlign.hs b/lib/Language/Haskell/Stylish/Step/SimpleAlign.hs index e02c270..e03f665 100644 --- a/lib/Language/Haskell/Stylish/Step/SimpleAlign.hs +++ b/lib/Language/Haskell/Stylish/Step/SimpleAlign.hs @@ -9,7 +9,7 @@ module Language.Haskell.Stylish.Step.SimpleAlign -------------------------------------------------------------------------------- import Control.Monad (guard) -import Data.List (foldl') +import Data.List (foldl', foldl1') import Data.Maybe (fromMaybe) import qualified GHC.Hs as Hs import qualified SrcLoc as S @@ -135,6 +135,39 @@ matchToAlignable _conf (S.L _ (Hs.Match _ _ _ _)) = Nothing -------------------------------------------------------------------------------- +multiWayIfToAlignable + :: Config + -> Hs.LHsExpr Hs.GhcPs + -> [Alignable S.RealSrcSpan] +multiWayIfToAlignable conf (S.L _ (Hs.HsMultiIf _ grhss)) = + fromMaybe [] $ traverse (grhsToAlignable conf) grhss +multiWayIfToAlignable _conf _ = [] + + +-------------------------------------------------------------------------------- +grhsToAlignable + :: Config + -> S.Located (Hs.GRHS Hs.GhcPs (Hs.LHsExpr Hs.GhcPs)) + -> Maybe (Alignable S.RealSrcSpan) +grhsToAlignable conf (S.L grhsloc (Hs.GRHS _ guards@(_ : _) body)) = do + guard $ cCases conf + let guardsLocs = map S.getLoc guards + bodyLoc = S.getLoc body + left = foldl1' S.combineSrcSpans guardsLocs + matchPos <- toRealSrcSpan grhsloc + leftPos <- toRealSrcSpan left + bodyPos <- toRealSrcSpan bodyLoc + Just $ Alignable + { aContainer = matchPos + , aLeft = leftPos + , aRight = bodyPos + , aRightLead = length "-> " + } +grhsToAlignable _conf (S.L _ (Hs.XGRHS x)) = Hs.noExtCon x +grhsToAlignable _conf (S.L _ _) = Nothing + + +-------------------------------------------------------------------------------- step :: Maybe Int -> Config -> Step step maxColumns config = makeStep "Cases" $ \ls module' -> let changes @@ -147,5 +180,6 @@ step maxColumns config = makeStep "Cases" $ \ls module' -> configured :: [Change String] configured = concat $ [changes records recordToAlignable | cRecords config] ++ - [changes everything (matchGroupToAlignable config)] in + [changes everything (matchGroupToAlignable config)] ++ + [changes everything (multiWayIfToAlignable config)] in applyChanges configured ls |