Move manyUntil to Text.Pandoc.Parsing and use it in Txt2Tags reader

src/Text/Pandoc/Parsing.hs

@@ -40,6 +40,7 @@ module Text.Pandoc.Parsing ( takeWhileP,
                              anyLineNewline,
                              indentWith,
                              many1Till,
+                             manyUntil,
                              notFollowedBy',
                              oneOfStrings,
                              oneOfStringsCI,
@@ -325,6 +326,20 @@ many1Till p end = do
          rest <- manyTill p end
          return (first:rest)
 
+-- | Like @manyTill@, but also returns the result of end parser.
+manyUntil :: (Stream s m t)
+          => ParserT s u m a
+          -> ParserT s u m b
+          -> ParserT s u m ([a], b)
+manyUntil p end = scan
+  where scan =
+          (do e <- end
+              return ([], e)
+          ) <|>
+          (do x <- p
+              (xs, e) <- scan
+              return (x:xs, e))
+
 -- | A more general form of @notFollowedBy@.  This one allows any
 -- type of parser to be specified, and succeeds only if that parser fails.
 -- It does not consume any input.

src/Text/Pandoc/Readers/Muse.hs

@@ -189,20 +189,6 @@ atStart p = do
   guard $ museLastStrPos st /= Just pos
   p
 
--- Like manyTill, but also returns result of end parser
-manyUntil :: (Stream s m t)
-          => ParserT s u m a
-          -> ParserT s u m b
-          -> ParserT s u m ([a], b)
-manyUntil p end = scan
-  where scan =
-          (do e <- end
-              return ([], e)
-          ) <|>
-          (do x <- p
-              (xs, e) <- scan
-              return (x:xs, e))
-
 someUntil :: (Stream s m t)
           => ParserT s u m a
           -> ParserT s u m b

src/Text/Pandoc/Readers/Txt2Tags.hs

@@ -529,8 +529,7 @@ image =  try $ do
   -- List taken from txt2tags source
   let extensions = [".jpg", ".jpeg", ".gif", ".png", ".eps", ".bmp"]
   char '['
-  path <- manyTill (noneOf "\n\t\r ") (try $ lookAhead (oneOfStrings extensions))
-  ext <- oneOfStrings extensions
+  (path, ext) <- manyUntil (noneOf "\n\t\r ") (oneOfStrings extensions)
   char ']'
   return $ B.image (path ++ ext) "" mempty
 

test/Tests/Readers/Txt2Tags.hs

@@ -96,9 +96,12 @@ tests =
       , "Autolink" =:
           "http://www.google.com" =?>
             para (link "http://www.google.com" "" (str "http://www.google.com"))
-      , "Image" =:
+      , "JPEG Image" =:
           "[image.jpg]" =?>
             para (image "image.jpg" "" mempty)
+      , "PNG Image" =:
+          "[image.png]" =?>
+            para (image "image.png" "" mempty)
 
       , "Link" =:
           "[title http://google.com]" =?>