Add remaining haskell book exercises

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
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+++ b/Haskell-book/26/MaybeT/src/MonadTrans.hs
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+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