diff options
| -rw-r--r-- | src/Text/Pandoc/Readers/Docx/Parse.hs | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/Text/Pandoc/Readers/Docx/Parse.hs b/src/Text/Pandoc/Readers/Docx/Parse.hs index 5cfe50c5c..96210c31a 100644 --- a/src/Text/Pandoc/Readers/Docx/Parse.hs +++ b/src/Text/Pandoc/Readers/Docx/Parse.hs @@ -100,6 +100,9 @@ maybeToD Nothing = throwError DocxError concatMapM :: (Monad m) => (a -> m [b]) -> [a] -> m [b] concatMapM f xs = liftM concat (mapM f xs) + +-- This is similar to `mapMaybe`: it maps a function returning the D +-- monad over a list, and only keeps the non-erroring return values. mapD :: (a -> D b) -> [a] -> D [b] mapD f xs = let handler x = (f x >>= (\y-> return [y])) `catchError` (\_ -> return []) |