blob: acbd6208df751290d1554fae346974bce9e21f75 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
{-# LANGUAGE TemplateHaskell, TypeFamilies, PolyKinds #-}
module T8884 where
import Language.Haskell.TH
import System.IO
type family Foo a = r | r -> a where
Foo x = x
type family Baz (a :: k) = (r :: k) | r -> a
type instance Baz x = x
$( do FamilyI foo@(ClosedTypeFamilyD _ tvbs1 res1 m_kind1 eqns1)
[] <- reify ''Foo
FamilyI baz@(OpenTypeFamilyD _ tvbs2 res2 m_kind2)
[inst@(TySynInstD _ eqn2)] <- reify ''Baz
runIO $ putStrLn $ pprint foo
runIO $ putStrLn $ pprint baz
runIO $ putStrLn $ pprint inst
runIO $ hFlush stdout
return [ ClosedTypeFamilyD (mkName "Foo'") tvbs1 res1 m_kind1 eqns1
, OpenTypeFamilyD (mkName "Baz'") tvbs2 res2 m_kind2
, TySynInstD (mkName "Baz'") eqn2 ] )
|
