Pipes.Fluid.Impulse

Documentation

newtype Impulse m a

The applicative instance of this combines multiple Producers reactively ie, yields a value as soon as either or both of the input producers yields a value.

Constructors

Impulse

Fields

• impulsively :: Producer a m ()

Instances

Monad m => Functor (Impulse m)

Methods

fmap :: (a -> b) -> Impulse m a -> Impulse m b

(<$) :: a -> Impulse m b -> Impulse m a

(Alternative m, Monad m) => Applicative (Impulse m)

Impulseively combines two producers, given initial values to use when the producer is blocked/failed. This only works for Alternative m where failure means there was no effects, eg. STM, or MonadTrans t => t STM. Be careful of monad transformers like ExceptT that hides the STM Alternative instance.

Methods

pure :: a -> Impulse m a

(<*>) :: Impulse m (a -> b) -> Impulse m a -> Impulse m b

liftA2 :: (a -> b -> c) -> Impulse m a -> Impulse m b -> Impulse m c

(*>) :: Impulse m a -> Impulse m b -> Impulse m b

(<*) :: Impulse m a -> Impulse m b -> Impulse m a

(Alternative m, Monad m) => Merge (Impulse m)

Impulseively combines two producers, given initial values to use when the produce hasn't produced anything yet Combine two signals, and returns a signal that emits Either bothfired (Either (leftFired, previousRight) (previousLeft, rightFired)). This only works for Alternative m where failure means there was no effects, eg. STM, or MonadTrans t => t STM. Be careful of monad transformers ExceptT that hides the STM Alternative instance.

Methods

merge' :: Maybe x -> Maybe y -> Impulse m x -> Impulse m y -> Impulse m (Merged x y)

(Alternative m, Monad m, Semigroup a) => Semigroup (Impulse m a)

Methods

(<>) :: Impulse m a -> Impulse m a -> Impulse m a

sconcat :: NonEmpty (Impulse m a) -> Impulse m a

stimes :: Integral b => b -> Impulse m a -> Impulse m a

(Alternative m, Monad m, Semigroup a) => Monoid (Impulse m a)

Methods

mempty :: Impulse m a

mappend :: Impulse m a -> Impulse m a -> Impulse m a

mconcat :: [Impulse m a] -> Impulse m a

Wrapped (Impulse m a)

Associated Types

type Unwrapped (Impulse m a) :: *

Methods

_Wrapped' :: Iso' (Impulse m a) (Unwrapped (Impulse m a))

(~) * (Impulse m1 a1) t => Rewrapped (Impulse m2 a2) t

type Unwrapped (Impulse m a)

type Unwrapped (Impulse m a) = Producer a m ()

module Pipes.Fluid.Merge