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-- test reification of data declarations
module TH_reifyDecl1 where
import Language.Haskell.TH
import Text.PrettyPrint.HughesPJ
infixl 3 `m`
-- simple
data T = A | B
-- parametric
data R a = C a | D
-- recursive
data List a = Nil | Cons a (List a)
-- infix operator
data Tree a = Leaf | Tree a :+: Tree a
-- type declaration
type IntList = [Int]
-- newtype declaration
newtype Length = Length Int
-- simple class
class C a where
m :: a -> Int
test :: ()
test = $(let
display :: Name -> Q ()
display q = do { i <- reify q; report False (pprint i) }
in do { display ''T
; display ''R
; display ''List
; display ''Tree
; display ''IntList
; display ''Length
; display 'Leaf
; display 'm
; [| () |] })
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