1 files changed, 15 insertions, 0 deletions
diff --git a/src/ContDo.hs b/src/ContDo.hs
new file mode 100644
index 0000000..255e21a
--- /dev/null
+++ b/src/ContDo.hs
@@ -0,0 +1,15 @@
+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE MonoLocalBinds #-}
+module ContDo where
+
+import GHC.TypeLits
+
+(>>=) :: (a -> b) -> a -> b
+(>>=) = ($)
+
+class AlwaysFail a
+instance TypeError (Text "fail") => AlwaysFail a
+
+fail :: AlwaysFail a => String -> a
+fail = error