diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Language/Haskell/Stylish/Step/Cases.hs | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/lib/Language/Haskell/Stylish/Step/Cases.hs b/lib/Language/Haskell/Stylish/Step/Cases.hs index e71c6c9..5ea30f4 100644 --- a/lib/Language/Haskell/Stylish/Step/Cases.hs +++ b/lib/Language/Haskell/Stylish/Step/Cases.hs @@ -34,13 +34,34 @@ altToAlignable (H.Alt ann pat rhs Nothing) = Just $ Alignable -------------------------------------------------------------------------------- +tlpats :: Data l => H.Module l -> [[H.Match l]] +tlpats modu = [matches | H.FunBind _ matches <- everything modu] + + +-------------------------------------------------------------------------------- +matchToAlignable :: H.Match l -> Maybe (Alignable l) +matchToAlignable (H.InfixMatch _ _ _ _ _ _) = Nothing +matchToAlignable (H.Match _ _ [] _ _) = Nothing +matchToAlignable (H.Match _ _ _ _ (Just _)) = Nothing +matchToAlignable (H.Match ann name pats rhs Nothing) = Just $ Alignable + { aContainer = ann + , aLeft = last (H.ann name : map H.ann pats) + , aRight = H.ann rhs + , aRightLead = length "= " + } + + +-------------------------------------------------------------------------------- step :: Int -> Step step maxColumns = makeStep "Cases" $ \ls (module', _) -> - let module'' = fmap H.srcInfoSpan module' in + let module'' = fmap H.srcInfoSpan module' + changes search toAlign = + [ change_ + | case_ <- search module'' + , aligns <- maybeToList (mapM toAlign case_) + , change_ <- align maxColumns aligns + ] in + applyChanges - [ change_ - | case_ <- cases module'' - , aligns <- maybeToList (mapM altToAlignable case_) - , change_ <- align maxColumns aligns - ] + (changes cases altToAlignable ++ changes tlpats matchToAlignable) ls |