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module Main where
import Data.Bits
import Test.QuickCheck hiding ((.&.))
import Data.GraphViz
import Data.Graph.Inductive.Example (clr479, dag4)
import Data.Text.Lazy
import Data.GraphViz.Printing
import Data.Graph.Inductive.Graph
import Data.Graph.Inductive.PatriciaTree
type Input = Bool
data Gate = And
| Or
| Xor
| Nand
| Nor
deriving (Show)
data Circuit a = In a
| Node Gate (Circuit a) (Circuit a)
deriving (Show)
instance Arbitrary Gate where
arbitrary = elements [And, Or, Xor, Nand, Nor]
instance (Arbitrary a) => Arbitrary (Circuit a) where
arbitrary = do
x <- arbitrary
frequency [(1, return (In x)), (1, arbNode)]
where
arbNode = Node <$> arbitrary <*> arbitrary <*> arbitrary
eval :: (Bits a) => Circuit a -> a
eval (In val) = val
eval (Node And c1 c2) = eval c1 .&. eval c2
eval (Node Or c1 c2) = eval c1 .|. eval c2
eval (Node Xor c1 c2) = eval c1 `xor` eval c2
eval (Node Nand c1 c2) = complement $ eval c1 .&. eval c2
eval (Node Nor c1 c2) = complement $ eval c1 .|. eval c2
visualize :: (Show a) => Circuit a -> Gr String String
visualize circ =
uncurry mkGraph $ graph Nothing 0 ([], []) circ
where
graph parent nl (l, e) circ =
case (parent, circ) of
(Nothing, (In val)) ->
((nl, "In: " ++ show val) : l, e)
(Just par, (In val)) ->
((nl, "In: " ++ show val) : l, (par, nl, "") : e)
_ ->
([], [])
main :: IO ()
--main = sample (arbitrary :: Gen (Circuit Input))
main = preview $ visualize (In True)
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