| Portability | GHC only |
|---|---|
| Maintainer | Simon Meier <iridcode@gmail.com> |
| Safe Haskell | None |
Extension.Data.Label
Description
Extensions to the first-class labels (fclabels) package.
- nthL :: Int -> [a] :-> a
- imageL :: Ord k => k -> Map k v :-> v
- fstL :: (a, b) :-> a
- sndL :: (a, b) :-> b
- module Data.Label
- liftLA :: Applicative f => (a :-> b) -> f a :-> f b
- modA :: Applicative f => (a :-> b) -> (b -> f b) -> a -> f a
- askM :: MonadReader r m => (r :-> a) -> m a
- setM :: MonadState s m => (s :-> a) -> a -> m ()
- getM :: MonadState s m => (s :-> a) -> m a
- modM :: MonadState s m => (s :-> a) -> (a -> a) -> m ()
- (=:) :: MonadState s m => :-> s a -> a -> m ()
Documentation
module Data.Label
Labels and applicative functors
modA :: Applicative f => (a :-> b) -> (b -> f b) -> a -> f aSource
Effectful modification of a labeled value.
Labels and Monads
askM :: MonadReader r m => (r :-> a) -> m aSource
Get part of the state from a reader.
setM :: MonadState s m => (s :-> a) -> a -> m ()Source
Set some part of the state.
getM :: MonadState s m => (s :-> a) -> m aSource
Get some part of the state.
modM :: MonadState s m => (s :-> a) -> (a -> a) -> m ()Source
Modify some part of the state.
(=:) :: MonadState s m => :-> s a -> a -> m ()
Alias for puts that reads like an assignment.