Mon Mar 1 03:15:55 PST 2010 [email protected]
* Suggest -XGeneralizedNewtypeDeriving (fix Trac #3888)
If we can't derive a type, but it's a reasonable possibility that
newtype deriving would do the job, suggest it.
A little refactoring too, moving non_iso_class to top level,
and putting it with std_class_via_iso.
M ./compiler/typecheck/TcDeriv.lhs -12 +23
View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20100301111555-1287e-bbd3e7c179d9127b18aba1ee37433d1a9e568601.gz
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