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-- This one killed GHC 5.02 with a funResultTy panic
-- The reason was that the simplifier was doing a
-- case-of-case where the result had a polymorphic type.
-- This in turn showed up because of a newtype (now
-- transparent) with a forall inside it.
--
-- It's quite hard to tickle this one, hence the two-module setup.
module FormParse where
import Control.Monad
import Simpl009Help
identifier :: Parser Char Char
identifier =
do c <- lookAhead
guard (c == 'a')
return c
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