Mutable.hs

--
-- Copyright (c) 2009-2011, ERICSSON AB
-- All rights reserved.
-- 
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are met:
-- 
--     * Redistributions of source code must retain the above copyright notice, 
--       this list of conditions and the following disclaimer.
--     * Redistributions in binary form must reproduce the above copyright
--       notice, this list of conditions and the following disclaimer in the
--       documentation and/or other materials provided with the distribution.
--     * Neither the name of the ERICSSON AB nor the names of its contributors
--       may be used to endorse or promote products derived from this software
--       without specific prior written permission.
-- 
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
-- DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
-- FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-- SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-- CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-- OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--

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