diff options
Diffstat (limited to 'testsuite/tests/quantified-constraints/T16474.hs')
| -rw-r--r-- | testsuite/tests/quantified-constraints/T16474.hs | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/testsuite/tests/quantified-constraints/T16474.hs b/testsuite/tests/quantified-constraints/T16474.hs new file mode 100644 index 0000000000..a4968ad444 --- /dev/null +++ b/testsuite/tests/quantified-constraints/T16474.hs @@ -0,0 +1,10 @@ +{-# LANGUAGE QuantifiedConstraints #-} +{-# LANGUAGE TypeFamilies #-} + +import GHC.Exts (Constraint) + +class (forall a. A t a => A t [a]) => B t where + type A t a :: Constraint + +instance B t => B [t] where + type A [t] a = A t a |