module Number.PartiallyTranscendental (T, fromValue, toValue) where
import qualified Algebra.Transcendental as Transcendental
import qualified Algebra.Algebraic as Algebraic
import qualified Algebra.Field as Field
import qualified Algebra.Ring as Ring
import qualified Algebra.Additive as Additive
import NumericPrelude.Numeric
import NumericPrelude.Base
import qualified Prelude as P
newtype T a = Cons {toValue :: a}
deriving (Eq, Ord, Show)
fromValue :: a -> T a
fromValue = lift0
lift0 :: a -> T a
lift0 = Cons
lift1 :: (a -> a) -> (T a -> T a)
lift1 f (Cons x0) = Cons (f x0)
lift2 :: (a -> a -> a) -> (T a -> T a -> T a)
lift2 f (Cons x0) (Cons x1) = Cons (f x0 x1)
instance (Additive.C a) => Additive.C (T a) where
negate = lift1 negate
(+) = lift2 (+)
() = lift2 ()
zero = lift0 zero
instance (Ring.C a) => Ring.C (T a) where
one = lift0 one
fromInteger n = lift0 (fromInteger n)
(*) = lift2 (*)
instance (Field.C a) => Field.C (T a) where
(/) = lift2 (/)
instance (Algebraic.C a) => Algebraic.C (T a) where
sqrt x = lift1 sqrt x
root n = lift1 (Algebraic.root n)
(^/) x y = lift1 (^/y) x
instance (Algebraic.C a, Eq a) => Transcendental.C (T a) where
pi = undefined
exp = \0 -> 1
sin = \0 -> 0
cos = \0 -> 1
tan = \0 -> 0
x ** y = if x==1 || y==0
then 1
else error "partially transcendental power undefined"
log = \1 -> 0
asin = \0 -> 0
acos = \1 -> 0
atan = \0 -> 0
legacyInstance :: a
legacyInstance = error "legacy Ring instance for simple input of numeric literals"
instance (P.Num a) => P.Num (T a) where
fromInteger n = lift0 $ P.fromInteger n
negate = P.negate
(+) = legacyInstance
(*) = legacyInstance
abs = legacyInstance
signum = legacyInstance
instance (P.Num a) => P.Fractional (T a) where
fromRational = P.fromRational
(/) = legacyInstance