GF/src is now for 2.9, and the new sources are in src-3.0 - keep it this way until the release of GF 3

src-3.0/Transfer/Syntax/ResolveLayout.hs

@@ -0,0 +1,29 @@
+module Main where
+
+import System.Environment (getArgs)
+
+import Transfer.Syntax.Lex
+import Transfer.Syntax.Layout
+
+prTokens :: [Token] -> String
+prTokens = prTokens_ 1 1
+  where 
+  prTokens_ _ _ [] = ""
+  prTokens_ l c (t@(PT (Pn _ l' c') _):ts) = 
+      replicate (l'-l) '\n' 
+       ++ replicate (if l' == l then c'-c else c'-1) ' '
+       ++ s ++ prTokens_ l' (c'+length s) ts
+    where s = prToken t
+--  prTokens_ l c (Err p:ts) = 
+
+layout :: String -> String
+layout s = prTokens ts'
+--           ++ "\n" ++ show ts'
+  where ts = tokens s
+        ts' = resolveLayout True ts
+
+main :: IO ()
+main = do args <- getArgs
+          case args of
+            [] -> getContents >>= putStrLn . layout
+            fs -> mapM_ (\f -> readFile f >>= putStrLn . layout) fs