monad-time-0.1: src/Control/Monad/Time/Instances.hs

{-# LANGUAGE FlexibleContexts, FlexibleInstances, OverlappingInstances
  , UndecidableInstances #-}
module Control.Monad.Time.Instances () where

import Control.Monad.Trans

import Control.Monad.Time

-- | Generic, overlapping instance.
instance (
    MonadTime m
  , MonadTrans t
  , Monad (t m)
  ) => MonadTime (t m) where
    currentTime = lift currentTime