Safe Haskell	None
Language	Haskell2010

Control.Tracer.Observe

Contents

Description

Functions useful for observing and measuring actions.

Synopsis

data ObserveIndicator
- = ObserveBefore
- | ObserveAfter
data Observable s e d
- = OStart s
- | OEnd e ( Maybe d)
matchObservations :: Monad m => m ( Maybe s) -> (s -> m ()) -> (s -> e -> d) -> Tracer m ( Observable s e d) -> Tracer m ( Observable s e d)

observing

Constructors

ObserveBefore
ObserveAfter

Instances details

Show ObserveIndicator Source #
Instance details Defined in Control.Tracer.Observe Methods showsPrec :: Int -> ObserveIndicator -> ShowS Source # show :: ObserveIndicator -> String Source # showList :: [ ObserveIndicator ] -> ShowS Source #

Constructors

OStart s
OEnd e ( Maybe d)

matchObservations :: Monad m => m ( Maybe s) -> (s -> m ()) -> (s -> e -> d) -> Tracer m ( Observable s e d) -> Tracer m ( Observable s e d) Source #