Predicates can be used as contracts, so:
(define (non-empty-hash? x)
(and (hash? x)
(not (hash-empty? x))))
Then you can use `non-empty-hash?` as your contract.
On Mon, Jun 12, 2017 at 3:56 PM, David Storrs <david.sto...@gmail.com> wrote:
> There is a non-empty-listof contract but no non-empty-hashof contract. Is
> there a way to build one?
>
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