| Safe Haskell | Safe-Inferred |
|---|
Data.Label.PureM
- gets :: MonadState s m => (s :-> a) -> m a
- puts :: MonadState s m => (s :-> a) -> a -> m ()
- modify :: MonadState s m => (s :-> a) -> (a -> a) -> m ()
- (=:) :: MonadState s m => (s :-> a) -> a -> m ()
- (=.) :: MonadState s m => (s :-> a) -> (a -> a) -> m ()
- asks :: MonadReader r m => (r :-> a) -> m a
- local :: MonadReader r m => (r :-> b) -> (b -> b) -> m a -> m a
MonadState lens operations.
gets :: MonadState s m => (s :-> a) -> m aSource
Get a value out of the state, pointed to by the specified lens.
puts :: MonadState s m => (s :-> a) -> a -> m ()Source
Set a value somewhere in the state, pointed to by the specified lens.
modify :: MonadState s m => (s :-> a) -> (a -> a) -> m ()Source
Modify a value with a function somewhere in the state, pointed to by the specified lens.
(=:) :: MonadState s m => (s :-> a) -> a -> m ()Source
Alias for puts that reads like an assignment.
(=.) :: MonadState s m => (s :-> a) -> (a -> a) -> m ()Source
Alias for modify that reads more or less like an assignment.
MonadReader lens operations.
asks :: MonadReader r m => (r :-> a) -> m aSource
Fetch a value pointed to by a lens out of a reader environment.
local :: MonadReader r m => (r :-> b) -> (b -> b) -> m a -> m aSource
Execute a computation in a modified environment. The lens is used to point out the part to modify.