diff options
| -rw-r--r-- | src/Text/Pandoc.hs | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/src/Text/Pandoc.hs b/src/Text/Pandoc.hs index d2bb85699..79ca4a6b7 100644 --- a/src/Text/Pandoc.hs +++ b/src/Text/Pandoc.hs @@ -166,6 +166,7 @@ import Text.Pandoc.Templates import Text.Pandoc.Options import Text.Pandoc.Shared (safeRead, warn) import Text.Pandoc.MediaBag (MediaBag) +import Text.Pandoc.Error import Data.Aeson import qualified Data.ByteString.Lazy as BL import Data.List (intercalate) @@ -201,19 +202,22 @@ parseFormatSpec = parse formatSpec "" '-' -> Set.delete ext _ -> Set.insert ext -data Reader = StringReader (ReaderOptions -> String -> IO Pandoc) - | ByteStringReader (ReaderOptions -> BL.ByteString -> IO (Pandoc, MediaBag)) -mkStringReader :: (ReaderOptions -> String -> Pandoc) -> Reader +data Reader = StringReader (ReaderOptions -> String -> IO (Either PandocError Pandoc)) + | ByteStringReader (ReaderOptions -> BL.ByteString -> IO (Either PandocError (Pandoc,MediaBag))) + +mkStringReader :: (ReaderOptions -> String -> (Either PandocError Pandoc)) -> Reader mkStringReader r = StringReader (\o s -> return $ r o s) -mkStringReaderWithWarnings :: (ReaderOptions -> String -> (Pandoc, [String])) -> Reader +mkStringReaderWithWarnings :: (ReaderOptions -> String -> Either PandocError (Pandoc, [String])) -> Reader mkStringReaderWithWarnings r = StringReader $ \o s -> do - let (doc, warnings) = r o s - mapM_ warn warnings - return doc + case r o s of + Left err -> return $ Left err + Right (doc, warnings) -> do + mapM_ warn warnings + return (Right doc) -mkBSReader :: (ReaderOptions -> BL.ByteString -> (Pandoc, MediaBag)) -> Reader +mkBSReader :: (ReaderOptions -> BL.ByteString -> (Either PandocError (Pandoc, MediaBag))) -> Reader mkBSReader r = ByteStringReader (\o s -> return $ r o s) -- | Association list of formats and readers. @@ -357,8 +361,8 @@ class ToJSONFilter a => ToJsonFilter a where toJsonFilter :: a -> IO () toJsonFilter = toJSONFilter -readJSON :: ReaderOptions -> String -> Pandoc -readJSON _ = either error id . eitherDecode' . UTF8.fromStringLazy +readJSON :: ReaderOptions -> String -> Either PandocError Pandoc +readJSON _ = mapLeft ParseFailure . eitherDecode' . UTF8.fromStringLazy writeJSON :: WriterOptions -> Pandoc -> String writeJSON _ = UTF8.toStringLazy . encode |