blob: 0d49a3c454f9b275ac99effc5cb1e1ffabdb6694 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
module Main where
import Data.Bits
import Test.QuickCheck hiding ((.&.), (.|.))
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
main :: IO ()
main = sample (arbitrary :: Gen (Circuit Input))
|
