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Diffstat (limited to 'testsuite/tests/typecheck/should_compile/tc182.hs')
| -rw-r--r-- | testsuite/tests/typecheck/should_compile/tc182.hs | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_compile/tc182.hs b/testsuite/tests/typecheck/should_compile/tc182.hs new file mode 100644 index 0000000000..f6e9164f47 --- /dev/null +++ b/testsuite/tests/typecheck/should_compile/tc182.hs @@ -0,0 +1,13 @@ +{-# LANGUAGE DatatypeContexts, ExistentialQuantification #-} + +-- Tests the "stupid theta" in pattern-matching +-- when there's an existential as well + +module ShouldCompile where + +data (Show a) => Obs a = forall b. LiftObs a b + +f :: Show a => Obs a -> String +f (LiftObs _ _) = "yes" + + |