and perhaps use emacs to
query-replace all the Foo1's back to Foo's
At least this bit can be avoided easily enough, by using
module qualification during the conversion process.
module Original (Foo(..)) where
data Foo = Foo { ... y :: Int } deriving ...
module New (Foo(..)) where
data Foo = Foo { ... y, z :: Int } deriving ...
module Convert where
import Original as Old
import New as New
newFoo :: Old.Foo -> New.Foo
newFoo old{..} = New.Foo { a=a, b=b, ... z=1 }
Finally rename module New.
Regards,
Malcolm
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