I would like to know more too. No one told me! Simon | -----Original Message----- | From: glasgow-haskell-users-bounces@haskell.org [mailto:glasgow-haskell-users- | bounces@haskell.org] On Behalf Of Jason Dusek | Sent: 26 March 2009 23:30 | To: glasgow-haskell-users@haskell.org | Subject: Really bad code for single method dictionaries? | | I was reading the stream fusion code today and came across a comment stating | that single element dictionaries interacted poorly with GHC's optimizer: | | class Unlifted a where | | [...] | expose [...] | | -- | This makes GHC's optimiser happier; it sometimes produces really bad | -- code for single-method dictionaries | -- | unlifted_dummy [...] | | A cursory search on GHC's Trac shows no corresponding bug; is this no longer | a problem? A small problem? I would like to know more about it. | | -- | Jason Dusek | | | | |...stream fusion code...| | http://www.cse.unsw.edu.au/~dons/code/streams/list/Data/Stream.hs | _______________________________________________ | Glasgow-haskell-users mailing list | Glasgow-haskell-users@haskell.org | http://www.haskell.org/mailman/listinfo/glasgow-haskell-users