Hi, The TransformListComp extension makes group a keyword. Unfortunately group is a useful function, and is even in Data.List. Thus, Data.List.group and TransformListComp are incompatible. This seems a very painful concession to give up a nice function name for a new extension. Is this intentional? Here's an example:
$ cat GroupKeyword.hs {-# LANGUAGE TransformListComp #-} module GroupKeyword where
a = map head $ group $ sort [1..100] $ ghci GroupKeyword.hs GHCi, version 6.10.2: http://www.haskell.org/ghc/ :? for help Loading package ghc-prim ... linking ... done. Loading package integer ... linking ... done. Loading package base ... linking ... done. [1 of 1] Compiling GroupKeyword ( GroupKeyword.hs, interpreted )
GroupKeyword.hs:4:15: parse error on input `group' Failed, modules loaded: none. Prelude>
There are some places I'd like to use TransformListComp, but I often want to use group in the same module. Thanks Neil