diff --git a/Text/Peggy/Prim.hs b/Text/Peggy/Prim.hs
--- a/Text/Peggy/Prim.hs
+++ b/Text/Peggy/Prim.hs
@@ -8,9 +8,12 @@
   ParseError(..),
   MemoTable(..),
   
-  memo,
   parse,
+  parseString,
+  parseFile,
   
+  memo,
+  
   getPos,
   setPos,
   
@@ -50,6 +53,7 @@
 nullError :: ParseError
 nullError = ParseError (LocPos $ SrcPos "" 0 1 1) ""
 
+errMerge :: ParseError -> ParseError -> ParseError
 errMerge e1@(ParseError loc1 msg1) e2@(ParseError loc2 msg2)
   | loc1 >= loc2 = e1
   | otherwise = e2
@@ -115,6 +119,21 @@
   case res of
     Parsed _ _ ret -> return $ Right ret
     Failed err -> return $ Left err
+
+parseString :: MemoTable tbl
+             => (forall s . Parser tbl str s a)
+             -> String
+             -> str
+             -> Either ParseError a
+parseString p inputName str =
+  parse p (SrcPos inputName 0 1 1) str
+
+parseFile :: MemoTable tbl
+             => (forall s . Parser tbl String s a)
+             -> FilePath
+             -> IO (Either ParseError a)
+parseFile p fp =
+  parse p (SrcPos fp 0 1 1) <$> readFile fp
 
 getPos :: Parser tbl str s SrcPos
 getPos = Parser $ \_ pos str -> return $ Parsed pos str pos
diff --git a/peggy.cabal b/peggy.cabal
--- a/peggy.cabal
+++ b/peggy.cabal
@@ -1,5 +1,5 @@
 Name:                peggy
-Version:             0.1.2
+Version:             0.1.3
 Synopsis:            The Parser Generator for Haskell
 
 Description:         The Parser Generator for Haskell