-- |
-- Module     : Simulation.Aivika.GPSS.Block.Return
-- Copyright  : Copyright (c) 2017, David Sorokin <david.sorokin@gmail.com>
-- License    : BSD3
-- Maintainer : David Sorokin <david.sorokin@gmail.com>
-- Stability  : experimental
-- Tested with: GHC 8.0.2
--
-- This module defines the GPSS block RETURN.
--
module Simulation.Aivika.GPSS.Block.Return
       (returnBlock) where

import Simulation.Aivika
import Simulation.Aivika.GPSS.Transact
import Simulation.Aivika.GPSS.Block
import Simulation.Aivika.GPSS.Facility

-- | This is the GPSS construct
--
-- @RETURN A@
returnBlock :: Facility a
               -- ^ the facility
               -> Block (Transact a) (Transact a)
returnBlock :: Facility a -> Block (Transact a) (Transact a)
returnBlock Facility a
r =
  Block :: forall a b. (a -> Process b) -> Block a b
Block { blockProcess :: Transact a -> Process (Transact a)
blockProcess = \Transact a
a -> Facility a -> Transact a -> Process ()
forall a. Facility a -> Transact a -> Process ()
returnFacility Facility a
r Transact a
a Process () -> Process (Transact a) -> Process (Transact a)
forall (m :: * -> *) a b. Monad m => m a -> m b -> m b
>> Transact a -> Process (Transact a)
forall (m :: * -> *) a. Monad m => a -> m a
return Transact a
a }