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klapaucius/gist:6193028

Last active December 20, 2015 20:49
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Fixed+TypeNats
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gistfile1.hs
Prelude> :set -XDataKinds
Prelude> :set -XKindSignatures
Prelude> :set -XScopedTypeVariables
Prelude> import Data.Fixed
Prelude Data.Fixed> import GHC.TypeLits
Prelude Data.Fixed GHC.TypeLits>
data E (a :: Nat)
Prelude Data.Fixed GHC.TypeLits>
instance SingI a => HasResolution (E a) where resolution _ = 10 ^ fromSing (sing :: Sing a)
Prelude Data.Fixed GHC.TypeLits> fromInteger 10 :: Fixed (E 2)
10.00
Prelude Data.Fixed GHC.TypeLits> fromInteger 10 :: Fixed (E 5)
10.00000
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