1 files changed, 7 insertions, 0 deletions
diff --git a/Haskell-book/26/MaybeT/src/MonadTrans.hs b/Haskell-book/26/MaybeT/src/MonadTrans.hs
new file mode 100644
index 0000000..7954164
--- /dev/null
+++ b/Haskell-book/26/MaybeT/src/MonadTrans.hs
@@ -0,0 +1,7 @@
+module MonadTrans where
+
+class MonadTrans t where
+    -- | Lift a computation from
+    -- the argument monad to
+    -- the constructed monad.
+    lift :: (Monad m) => m a -> t m a