1 files changed, 11 insertions, 0 deletions

diff --git a/ScanningParser.hs b/ScanningParser.hs
index a0a5d23..f99e120 100644
--- a/ScanningParser.hs
+++ b/ScanningParser.hs
@@ -3,6 +3,7 @@
 module ScanningParser
  ( ScanningParser(..)
  , scanAndParse
+ , scanAndParse1
  ) where
 
 import Data.Maybe
@@ -61,3 +62,13 @@ scanAndParse psr@(ScanningParser ffst pbdy) ts = do
         b <- ffst x
         return (b,drop 1 ts)
 
+scanAndParse1 :: ScanningParser a c -> [a] -> (Maybe c, [a])
+scanAndParse1 psr@(ScanningParser ffst pbdy) ts = 
+    maybe (Nothing,[]) (uncurry pbdy) mb
+ where
+    mb = listToMaybe $ mapMaybe findfst' tss
+    tss = tails ts
+    findfst' ts = do
+        x <- listToMaybe ts
+        b <- ffst x
+        return (b,drop 1 ts)