structure ROOT =
struct
structure HOL =
struct
datatype boola = True | False;
fun nota False = True;
fun op_conj y True = y;
end; (*struct HOL*)
structure Nat =
struct
datatype nat = Zero_nat | Suc of nat;
fun less_nat Zero_nat (Suc n) = HOL.True;
fun less_eq_nat m n = HOL.nota (less_nat n m);
end; (*struct Nat*)
structure Codegen =
struct
fun in_interval (k, l) n =
HOL.op_conj (Nat.less_eq_nat k n) (Nat.less_eq_nat n l)
| in_interval (k, l) n =
HOL.op_conj (Nat.less_eq_nat k n) (Nat.less_eq_nat n l);
end; (*struct Codegen*)
end; (*struct ROOT*)