-- They just clutter up the environment (esp tuples), and the parser
-- will generate Exact RdrNames for them, so the cluttered
-- envt is no use. To avoid doing this filter all the time,
- -- we use -fno-implicit-prelude as a clue that the filter is
+ -- we use -XNoImplicitPrelude as a clue that the filter is
-- worth while. Really, it's only useful for GHC.Base and GHC.Tuple.
--
-- It's worth doing because it makes the environment smaller for
its interface (although we could).
b) It might be GHC.Real.fromRational, or GHC.Num.fromInteger
- These are seen as "used" by the renamer (if -fno-implicit-prelude)
+ These are seen as "used" by the renamer (if -XNoImplicitPrelude)
is on), but the typechecker may discard their uses
if in fact the in-scope fromRational is GHC.Read.fromRational,
(see tcPat.tcOverloadedLit), and the typechecker sees that the type