Bin : Type Bin represents binary numbers right-to-left.
For instance `4` can be represented as `OOI`.
Note that representations are not unique: one may append arbitrarily
many Os to the right of the representation without changing the meaning.
Totality: total
Visibility: public exporttoNat : Bin -> Nat Conversion from lists of bits to natural number.
Totality: total
Visibility: public exportsuc : Bin -> Bin Successor function on binary numbers.
Amortised constant time.
Totality: total
Visibility: public exportsucCorrect : toNat (suc bs) = S (toNat bs) Correctness proof of `suc` with respect to the semantics in terms of Nat
Totality: total
Visibility: export