As mentioned in the guide, while conformers can be used to implement
coercions, that is something you should think about very carefully. When
you register a spec with a conformer, you are making a choice for all
possible future consumers of that spec as to how they are getting the
conformed data back. That is a lot to "bake in" so tread very carefully,
especially if you expect to share that spec with others.
On Wednesday, May 25, 2016 at 7:55:16 AM UTC-5, Gary Trakhman wrote:
>
> I answered my own question in the specific case, this seems to work:
>
> (defn to-int
> [x]
> (try
> (Long/parseLong x)
> (catch Exception _
> nil)))
>
> (s/def ::intable (s/conformer to-int))
>
> (s/conform (s/cat :ints ::intable) ["5"])
> > {:ints 5}
>
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