{-# LANGUAGE StandaloneDeriving, DeriveDataTypeable #-}

{- |

Module : $Header$

Description : special ShATermConvertible instances

Copyright : (c) Klaus Luettich, C. Maeder, Uni Bremen 2005-2006

License : GPLv2 or higher, see LICENSE.txt

Maintainer : Christian.Maeder@dfki.de

Stability : provisional

Portability : non-portable (overlapping Typeable instances)

This module provides instances of `ShATermConvertible`.

-}

module Common.ATerm.ConvInstances () where

import ATerm.Lib

import Common.Lib.SizedList as SizedList

import qualified Common.Lib.Rel as Rel

import qualified Common.Lib.MapSet as MapSet

import qualified Common.InjMap as InjMap

import Data.Typeable

import Data.Time (TimeOfDay (..))

import Data.Fixed (Pico)

import Data.Ratio (Ratio)

import System.Time

instance ShATermConvertible a => ShATermConvertible (SizedList.SizedList a)

where

toShATermAux att0 = toShATermAux att0 . SizedList.toList

fromShATermAux ix att0 = case fromShATermAux ix att0 of

(att, l) -> (att, SizedList.fromList l)

instance (Ord a, ShATermConvertible a, Ord b, ShATermConvertible b)

=> ShATermConvertible (InjMap.InjMap a b) where

toShATermAux att0 x = do

(att1, a') <- toShATerm' att0 $ InjMap.getAToB x

(att2, b') <- toShATerm' att1 $ InjMap.getBToA x

return $ addATerm (ShAAppl "InjMap" [a', b'] []) att2

fromShATermAux ix att0 = case getShATerm ix att0 of

ShAAppl "InjMap" [a, b] _ ->

case fromShATerm' a att0 of { (att1, a') ->

case fromShATerm' b att1 of { (att2, b') ->

(att2, InjMap.unsafeConstructInjMap a' b') }}

u -> fromShATermError "InjMap" u

instance (Ord a, ShATermConvertible a, Ord b, ShATermConvertible b)

=> ShATermConvertible (MapSet.MapSet a b) where

toShATermAux att0 r = do

(att1, a') <- toShATerm' att0 $ MapSet.toMap r

return $ addATerm (ShAAppl "MapSet" [a'] []) att1

fromShATermAux ix att0 = case getShATerm ix att0 of

ShAAppl "MapSet" [a] _ ->

case fromShATerm' a att0 of { (att1, a') ->

(att1, MapSet.fromDistinctMap a') }

u -> fromShATermError "MapSet" u

instance (Ord a, ShATermConvertible a) => ShATermConvertible (Rel.Rel a) where

toShATermAux att0 r = do

(att1, a') <- toShATerm' att0 $ Rel.toMap r

return $ addATerm (ShAAppl "Rel" [a'] []) att1

fromShATermAux ix att0 = case getShATerm ix att0 of

ShAAppl "Rel" [a] _ ->

case fromShATerm' a att0 of { (att1, a') ->

(att1, Rel.fromMap a') }

u -> fromShATermError "Rel" u

deriving instance Typeable ClockTime

instance ShATermConvertible ClockTime where

toShATermAux att0 (TOD a b) = do

(att1, a') <- toShATerm' att0 a

(att2, b') <- toShATerm' att1 b

return $ addATerm (ShAAppl "TOD" [a', b'] []) att2

fromShATermAux ix att0 = case getShATerm ix att0 of

ShAAppl "TOD" [a, b] _ ->

case fromShATerm' a att0 of { (att1, a') ->

case fromShATerm' b att1 of { (att2, b') ->

(att2, TOD a' b') }}

u -> fromShATermError "ClockTime" u

instance ShATermConvertible Double where

toShATermAux att = toShATermAux att . toRational

fromShATermAux ix att0 = case fromShATermAux ix att0 of

(att, r) -> (att, fromRational r)

instance ShATermConvertible TimeOfDay where

toShATermAux att0 (TimeOfDay a b c) = do

(att1, a') <- toShATerm' att0 a

(att2, b') <- toShATerm' att1 b

(att3, c') <- toShATerm' att2 (toRational c :: Rational)

return $ addATerm (ShAAppl "TimeOfDay" [a', b', c'] []) att3

fromShATermAux ix att0 = case getShATerm ix att0 of

ShAAppl "TimeOfDay" [a, b, c] _ ->

case fromShATerm' a att0 of { (att1, a') ->

case fromShATerm' b att1 of { (att2, b') ->

case fromShATerm' c att2 of { (att3, c') ->

(att3, TimeOfDay a' b'

$ (fromRational :: Ratio Integer -> Pico) c') }}}

u -> fromShATermError "TimeOfDay" u

instance ShATermConvertible Ordering where

toShATermAux att = toShATermAux att . ordToInt

fromShATermAux ix att0 = case fromShATermAux ix att0 of

(att, i) -> (att, ordFromInt i)

ordFromInt :: Int -> Ordering

ordFromInt 0 = LT

ordFromInt 1 = EQ

ordFromInt 2 = GT

ordFromInt i = error $ "ordFromInt: only values from 0 to 2 allowed but got "

++ show i

ordToInt :: Ordering -> Int

ordToInt LT = 0

ordToInt EQ = 1

ordToInt GT = 2