diff options
Diffstat (limited to 'testsuite/tests/lib/should_run/show001.hs')
| -rw-r--r-- | testsuite/tests/lib/should_run/show001.hs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/testsuite/tests/lib/should_run/show001.hs b/testsuite/tests/lib/should_run/show001.hs new file mode 100644 index 0000000000..69c27d01ea --- /dev/null +++ b/testsuite/tests/lib/should_run/show001.hs @@ -0,0 +1,24 @@ +-- !!! Testing Show on Maybes and Eithers +module Main(main) where + +x :: Maybe () +x = Nothing + +main :: IO () +main = do + print x + print (Just ()) + print ((Just (Just ())) :: Maybe (Maybe ())) + print (Just x) + print ((Left 'a') :: Either Char Int) + print ((Right 'b') :: Either Int Char) + print ((Right x) :: Either Int (Maybe ())) + print ((Right (Just 'c')) :: Either Int (Maybe Char)) + print ((Right (Right 'd')) :: Either Int (Either Char Char)) + print ((Right (Left 'e')) :: Either Int (Either Char Int)) + print ((Left 'f') :: Either Char Int) + print ((Left x) :: Either (Maybe ()) Char) + print ((Left (Just 'g')) :: Either (Maybe Char) ()) + print ((Left (Right 'h')) :: Either (Either Int Char) Char) + print ((Left (Right 'i')) :: Either (Either Int Char) ()) + |