[project @ 1996-01-08 20:28:12 by partain]

[ghc-hetmet.git] / ghc / compiler / tests / typecheck / should_fail / tcfail019.hs

diff --git a/ghc/compiler/tests/typecheck/should_fail/tcfail019.hs b/ghc/compiler/tests/typecheck/should_fail/tcfail019.hs
new file mode 100644 (file)
index 0000000..b3da9cd
--- /dev/null
+++ b/ghc/compiler/tests/typecheck/should_fail/tcfail019.hs
@@ -0,0 +1,21 @@
+
+module P where
+
+class A a where
+ p1 :: a -> a
+ p2 :: a -> a -> a
+
+class (A b) => B b where
+ p3 :: b
+ p4 :: b -> b
+
+class (A c) => C c where
+ p5 :: c -> c
+ p6 :: c -> Int
+
+class (B d,C d) => D d where
+ p7 :: d -> d
+
+instance D [a] where
+ p7 l = []
+