{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE TypeSynonymInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}
--
-- 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 "Data.TypeLevel.Num.Aliases" is re-exported because
-- wrappers use type level numbers frequently
module Feldspar.Wrap
( Wrap(..)
, Data'(..)
, module Data.TypeLevel.Num.Aliases
, D0
, D1
, D2
, D3
, D4
, D5
, D6
, D7
, D8
, D9
) where
import Feldspar.Core.Constructs
import Feldspar.Core.Types
import Language.Syntactic
import Data.TypeLevel.Num.Aliases
import Data.TypeLevel.Num.Reps (D0, D1, D2, D3, D4, D5, D6, D7, D8, D9 )
-- | Wrapping Feldspar functions
class Wrap t w where
wrap :: t -> w
-- | Basic instances to handle @Data a@ input and output.
-- Other instances are located in the concerned libraries.
instance Wrap (Data a) (Data a) where
wrap = id
instance (Wrap t u) => Wrap (Data a -> t) (Data a -> u) where
wrap f = wrap . f
-- | Extended 'Data' to be used in wrappers
data Data' s a =
Data'
{ unData' :: Data a
}
-- Syntactic instance for 'Data''
instance Type a => Syntactic (Data' s a)
where
type Domain (Data' s a) = FeldDomainAll
type Internal (Data' s a) = a
desugar = desugar . unData'
sugar = Data' . sugar
instance Type a => Syntax (Data' s a)