Debug.Hood.Observe

The main Hood API

observe :: Observable a => String -> a -> a

observe observes data structures in flight.

An example of use is map (+1) . observe "intermeduate" . map (+2)

In this example, we observe the value that flows from the producer map (+2) to the consumer map (+1).

observe can also observe functions as well a structural values.

newtype Observer

Constructors

O (forall a. Observable a => String -> a -> a)

type Observing a = a -> a

class Observable a where

Methods

observer :: a -> Parent -> a

observers :: String -> (Observer -> a) -> a

Instances

Observable a

runO :: IO a -> IO ()

printO :: a -> IO ()

putStrO :: String -> IO ()

For advanced users, that want to render their own datatypes.

(<<) :: Observable a => ObserverM (a -> b) -> a -> ObserverM b

thunk :: Observable a => a -> ObserverM a

send :: a

observeBase :: a -> Parent -> a

observeOpaque :: String -> a -> Parent -> a

For users that want to write there own render drivers.

debugO :: Monad m => t -> m [a]