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Diffstat (limited to 'testsuite/tests/deriving/should_compile/Roles13.hs')
| -rw-r--r-- | testsuite/tests/deriving/should_compile/Roles13.hs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/testsuite/tests/deriving/should_compile/Roles13.hs b/testsuite/tests/deriving/should_compile/Roles13.hs new file mode 100644 index 0000000000..70d4c0c7d0 --- /dev/null +++ b/testsuite/tests/deriving/should_compile/Roles13.hs @@ -0,0 +1,12 @@ +{-# LANGUAGE TypeFamilies, GeneralizedNewtypeDeriving, + MultiParamTypeClasses, FunctionalDependencies #-} + +-- tests axiom roles + +module Roles13 where + +newtype Age = MkAge Int +newtype Wrap a = MkWrap a + +convert :: Wrap Age -> Int +convert (MkWrap (MkAge i)) = i |