diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Language/Haskell/Stylish/Parse.hs | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/Language/Haskell/Stylish/Parse.hs b/src/Language/Haskell/Stylish/Parse.hs index 580e0fd..36422d1 100644 --- a/src/Language/Haskell/Stylish/Parse.hs +++ b/src/Language/Haskell/Stylish/Parse.hs @@ -6,7 +6,7 @@ module Language.Haskell.Stylish.Parse -------------------------------------------------------------------------------- import Control.Monad.Error (throwError) -import Data.Maybe (fromMaybe) +import Data.Maybe (fromMaybe, listToMaybe) import qualified Language.Haskell.Exts.Annotated as H @@ -18,10 +18,13 @@ import Language.Haskell.Stylish.Step -------------------------------------------------------------------------------- -- | Filter out lines which use CPP macros unCpp :: String -> String -unCpp = unlines . map unCpp' . lines +unCpp = unlines . go False . lines where - unCpp' ('#' : _) = "" - unCpp' xs = xs + go _ [] = [] + go isMultiline (x : xs) = + let isCpp = isMultiline || listToMaybe x == Just '#' + nextMultiline = isCpp && not (null x) && last x == '\\' + in (if isCpp then "" else x) : go nextMultiline xs -------------------------------------------------------------------------------- |