should generate the same code! | -----Original Message----- | From: glasgow-haskell-users-bounces@haskell.org [mailto:glasgow-haskell-users- | bounces@haskell.org] On Behalf Of Serge D. Mechveliani | Sent: 15 May 2009 09:00 | To: glasgow-haskell-users@haskell.org | Subject: comprehension vs `map' | | Dear GHC team, | | I would like to write | [rl {ruleMode = AlwaysApply} | rl <- rules calc] (I) | | instead of map (\ rl -> rl {ruleMode = AlwaysApply}) $ rules calc (II) | and instead of | let rs = rules calc in [rl {ruleMode = AlwaysApply} | rl <- rs] (III). | | But is this reliable in GHC that the compiler converts (I) into something | which is not not worse than III ? | What about other implementations? | | Regards, | | ----------- | Mechveliani | mechvel@botik.ru | | | _______________________________________________ | Glasgow-haskell-users mailing list | Glasgow-haskell-users@haskell.org | http://www.haskell.org/mailman/listinfo/glasgow-haskell-users