On 4/27/20, Tim Hanson <tbh...@gmail.com> wrote:
>
> I thought I'd check here:
> - does this seem like a reasonable idea?
> - is mine an unusual use case and most folks know what format to expect and
> the exception approach is fine?
I've written code like this before and used it in a contract.
```
(define (iso8601-string? x)
(and (string? x)
(with-handlers ((exn:gregor:parse? (lambda (e) #false)))
(date? (iso8601->date x)))))
(module+ test
(test-case "iso8601-string?"
(check-pred iso8601-string? "2018-10-02T01:00:00")))
```
I haven't had to worry about its performance; it was fast enough!
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