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/GF/Infra/Comments.hs

@@ -0,0 +1,43 @@
+----------------------------------------------------------------------
+-- |
+-- Module      : Comments
+-- Maintainer  : (Maintainer)
+-- Stability   : (stable)
+-- Portability : (portable)
+--
+-- > CVS $Date: 2005/04/21 16:22:34 $ 
+-- > CVS $Author: bringert $
+-- > CVS $Revision: 1.5 $
+--
+-- comment removal
+-----------------------------------------------------------------------------
+
+module GF.Infra.Comments ( remComments
+		) where
+
+-- | comment removal : line tails prefixed by -- as well as chunks in @{- ... -}@
+remComments :: String -> String
+remComments s = 
+  case s of
+    '"':s2 -> '"':pass remComments s2 -- comment marks in quotes not removed!
+    '{':'-':cs -> readNested cs
+    '-':'-':cs -> readTail cs
+    c:cs -> c : remComments cs
+    [] -> []
+   where
+     readNested t = 
+       case t of
+         '"':s2 -> '"':pass readNested s2
+         '-':'}':cs -> remComments cs
+         _:cs -> readNested cs
+         [] -> []
+     readTail t = 
+       case t of
+         '\n':cs -> '\n':remComments cs
+         _:cs -> readTail cs
+         [] -> []
+     pass f t = 
+       case t of
+         '"':s2 -> '"': f s2
+         c:s2 -> c:pass f s2
+         _ -> t