main :: IO ()
main = do
  print =<< test_cexp 3 4
  print =<< test_cexp_unsafe 3 4
  test_voidExp
main :: IO ()
main = do
  print =<< test_cexp 3 4
  print =<< test_cexp_unsafe 3 4
  test_voidExp
main = do
  print =<< test_cexp 3 4
  print =<< test_cexp_unsafe 3 4
  test_voidExp