speculate-0.3.5: eg/arith.hs

import Test.Speculate

main :: IO ()
main = speculate args
  { constants =
      [ showConstant (0::Int)
      , showConstant (1::Int)
      , constant "+"  ((+) :: Int -> Int -> Int)
      , constant "*"  ((*) :: Int -> Int -> Int)
      ]
  }