haskoon-0.3.1.1: src/Factis/Haskoon/WebIdT.hs

{-# LANGUAGE GeneralizedNewtypeDeriving #-}
module Factis.Haskoon.WebIdT (WebTrans(..), WebIdT(..)) where

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-- STDLIB
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import Control.Monad.Trans (MonadTrans(..), MonadIO(..))

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-- LOCAL
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import Factis.Haskoon.WebTrans (WebTrans(..))

newtype WebIdT m a = WebIdT { runWebIdT :: m a } deriving (Monad)

instance MonadTrans WebIdT where
    lift = WebIdT

instance MonadIO m => MonadIO (WebIdT m) where
    liftIO = WebIdT . liftIO

instance WebTrans WebIdT where
    liftWeb = WebIdT
    liftWebFun f cont = WebIdT (f (runWebIdT cont))