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-rw-r--r--testsuite/tests/polykinds/T5937.hs6
1 files changed, 6 insertions, 0 deletions
diff --git a/testsuite/tests/polykinds/T5937.hs b/testsuite/tests/polykinds/T5937.hs
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+++ b/testsuite/tests/polykinds/T5937.hs
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+{-# LANGUAGE PolyKinds, KindSignatures, DataKinds, GADTs #-}
+module T5937 where
+
+data SMaybe :: (k -> *) -> Maybe k -> * where
+ SNothing :: SMaybe s 'Nothing
+ SJust :: s a -> SMaybe s ('Just a)