System.Chatty.Misc

Provides typeclasses for clocks and randomizer environments

Documentation

class (Functor m, Monad m) => ChClock m where

Typeclass for all monads that know the time

Minimal complete definition

mutctime

Methods

mutctime :: m UTCTime

Get UTC Time

mgetstamp :: m NominalDiffTime

Get timestamp, guaranteed to grow

Instances

ChClock IO

Methods

mutctime :: IO UTCTime

mgetstamp :: IO NominalDiffTime

class Monad m => ChRandom m where

Typeclass for all monads that may provide random numbers

Minimal complete definition

mrandom, mrandomR

Methods

mrandom :: Random r => m r

Get a single random number

mrandomR :: Random r => (r, r) -> m r

Get a single random number in the given range

Instances

ChRandom IO

Methods

mrandom :: Random r => IO r

mrandomR :: Random r => (r, r) -> IO r