[project @ 1997-09-08 09:48:01 by simonm]

reinstate tests that now work.

diff --git a/ghc/tests/typecheck/should_compile/tc081.hs b/ghc/tests/typecheck/should_compile/tc081.hs
new file mode 100644 (file)
index 0000000..6590550
--- /dev/null
+++ b/ghc/tests/typecheck/should_compile/tc081.hs
@@ -0,0 +1,28 @@
+--!!! an example Simon made up
+--
+module ShouldSucceed where
+
+f x = (x+1, x<3, g True, g 'c')
+       where
+       g y = if x>2 then [] else [y]
+{-
+Here the type-check of g will yield an LIE with an Ord dict
+for x.  g still has type forall a. a -> [a].  The dictionary is
+free, bound by the x.
+
+It should be ok to add the signature:
+-}
+
+f2 x = (x+1, x<3, g2 True, g2 'c')
+       where
+       -- NB: this sig:
+       g2 :: a -> [a]
+       g2 y = if x>2 then [] else [y]
+{-
+or to write:
+-}
+
+f3 x = (x+1, x<3, g3 True, g3 'c')
+       where
+       -- NB: this line:
+       g3 = (\ y -> if x>2 then [] else [y])::(a -> [a])

diff --git a/ghc/tests/typecheck/should_run/tcrun001.hs b/ghc/tests/typecheck/should_run/tcrun001.hs
new file mode 100644 (file)
index 0000000..f45f506
--- /dev/null
+++ b/ghc/tests/typecheck/should_run/tcrun001.hs
@@ -0,0 +1,16 @@
+--!! Test for (->) instances
+
+module ShouldRun where
+
+class Flob k where
+  twice :: k a a  -> k a a
+
+instance Flob (->) where
+  twice f = f . f
+
+inc :: Int -> Int
+inc x = x+1
+
+main = print (twice inc 2)
+
+