diff options
Diffstat (limited to 'libraries/base/Control')
| -rw-r--r-- | libraries/base/Control/Monad.hs | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/libraries/base/Control/Monad.hs b/libraries/base/Control/Monad.hs index 9d858bd332..a964581fef 100644 --- a/libraries/base/Control/Monad.hs +++ b/libraries/base/Control/Monad.hs @@ -104,7 +104,12 @@ infixr 1 <=<, >=> (>=>) :: Monad m => (a -> m b) -> (b -> m c) -> (a -> m c) f >=> g = \x -> f x >>= g --- | Right-to-left Kleisli composition of monads. @('>=>')@, with the arguments flipped +-- | Right-to-left Kleisli composition of monads. @('>=>')@, with the arguments flipped. +-- +-- Note how this operator resembles function composition @('.')@: +-- +-- > (.) :: (b -> c) -> (a -> b) -> a -> c +-- > (<=<) :: Monad m => (b -> m c) -> (a -> m b) -> a -> m c (<=<) :: Monad m => (b -> m c) -> (a -> m b) -> (a -> m c) (<=<) = flip (>=>) |