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module Feldspar.Core.Frontend.Mutable
where

import Prelude hiding (not)

import Data.Typeable

import Language.Syntactic
import Language.Syntactic.Frontend.Monad

import Feldspar.Core.Types
import Feldspar.Core.Constructs
import Feldspar.Core.Constructs.Loop
import Feldspar.Core.Frontend.Num
import Feldspar.Core.Frontend.Logic
import Feldspar.Core.Frontend.Tuple
import qualified Feldspar.Core.Constructs.Mutable as Feature
import qualified Feldspar.Core.Constructs.MutableReference as Feature
import qualified Feldspar.Core.Constructs.MutableArray as Feature

newtype M a = M { unM :: Mon TypeCtx FeldDomain Mut a }
  deriving (Functor, Monad)

instance Syntax a => Syntactic (M a) FeldDomainAll
  where
    type Internal (M a) = Mut (Internal a)
    desugar = desugar . unM
    sugar   = M . sugar

runMutable :: (Syntax a) => M a -> a
runMutable = sugarSym Feature.Run

when :: Data Bool -> M () -> M ()
when = sugarSym Feature.When

unless :: Data Bool -> M () -> M ()
unless = when . not