How do I get the merged form of a spec?

Does clojure/spec have a predicate that matches g/simple-type?

but no more

i.e. doesn’t match complex (collection) types

no, but (def simple? (comp not coll?)) is a good first approximation

Or (complement coll?)

yep, gooder

well, mine was shorter :)

“complement” is a long word :)

🙂

am I right to understand that you can’t document keys with (s/keys :opt [::some-key]) without also providing the spec for ::some-key?

It won't generate without a spec for ::some-key but it will validate just fine -- it will treat missing specs as any? I believe.

^ @uwo is that the scenario you are asking about?

@seancorfield yes! that’s the way I thought/hoped it worked, but I was calling s/assert in some clojurescript code and it was complaining about some keys that I had declared in s/keys, but that did not have their own spec.

@alexmiller those were some meaningful tweets