let cmp d e =
match d with
| Real ->
(match e with
| Real -> 0
| Int -> 1
| Nonint -> 1)
| Int ->
(match e with
| Real -> -1
| Int -> 0
| Nonint -> 1)
| Nonint ->
(match e with
| Real -> -1
| Int -> -1
| Nonint -> 0)