On 8 May 2015 at 18:40, Andy Fingerhut <andy.finger...@gmail.com> wrote:
> James, are you saying that with such a core.typed annotation for function
> available in that example, that it would give a warning if available or any
> of the functions it calls accesses any keys other than :stock and :reserved
> ?
>
Yes and no. The function can access other keys, but their type will be
"Any", limiting their use.
For instance, if I changed the function to include an additional key,
without changing the type annotation:
(defn available [{:keys [stock reserved pending-delivery]}]
(- stock reserved pending-delivery))
Then core.typed would raise a type error, since [Int Int Any] is not a
valid type signature for clojure.core/-.
However, it might be worth raising the suggestion to Ambrose to add a way
of failing immediately if an unknown key is used, rather than just
assigning the "Any" type.
- James
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