let prop_unop mem op tyr e te =
let ct1 = object_of te in
let ctr = object_of tyr in
match op with
| Neg ->
begin
match ctr,ct1 with
| C_int ir , C_int i1 ->
prop_of_int (A.i_neg ir (expr_int mem i1 ir e))
| C_float fr , C_float f1 ->
prop_of_float (R.f_neg fr (expr_float mem f1 fr e))
| _ -> assert false
end
| BNot ->
begin
match ctr,ct1 with
| C_int ir , C_int i1 -> not_of_int (expr_int mem i1 ir e)
| _ -> assert false
end
| LNot -> let term = !expr_rec mem e in not_of_value term