| 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
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