| according to the most recent status report, the syntax is not quite | settled yet, so what is in ghc head might still change. more info here: | | http://haskell.org/haskellwiki/GHC/StandAloneDeriving
Indeed... but nothing much is happening at the moment because there's not been much feedback so it's drifted off the radar (so to speak). Refining the wiki and evolving a consensus would be great.
feedback, as requested:-) - i definitely would like to have standalone deriving, not just in ghc (in HaRe, we used to run a script over the various Programatica ast sources to extract all the data types we needed to run DrIFT over, to get ast traversal operations; the only alternative would have been to modify their sources, but those were evolving separately; the same problem has arisen again and again, be it template haskell asts or ghc api asts or Language.Haskell or ..) - syntaxwise, i'm partial to 'derived instance ..', but i can see the appeal of 'instance .. derived' (what comes after the instance head determines what is going on: 'where..' / 'derived' / '' ) - there should at least be the option of specifying the context (if one wants context inference, that is a separate issue which should be handled consistently in all instances) does that help to keep it on the radar?-) claus