events/src/Events/Spec.hs


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{-# LANGUAGE GADTs, DataKinds, TypeOperators #-}

module Events.Spec
       ( interpret
       , Spec, Cmnd(..), Expr(..), Elem(..)
       , module Events.Spec.Parse
       , module Events.Spec.Eval
       ) where

import Events.Spec.Types
import Events.Spec.Eval

import Events.Spec.Parse

import Control.Monad ((<=<))
import Control.Monad.IO.Class
import Control.Monad.State.Lazy

import Data.Monoid
import Data.Foldable
import Control.Lens

import Debug.Trace

interpret :: MonadIO m => Spec m -> Eval m ()
interpret = join . fmap interpretCmnd . evalExpr

interpretCmnd :: MonadIO m => Cmnd -> Eval m ()
interpretCmnd (COverride obj) = objPayload ?= obj
interpretCmnd (COccurs b)     = objOccurs .= b
interpretCmnd _               = return ()