this spec used to work in 0.1.x (s/explain (s/and map? (s/+ (s/or :pair (s/cat :key keyword? :value boolean?)))) {:foo true}) but with 0.2.168 it fails predicate: (or (nil? %) (sequential? %))

I use that spec to conform some hash-map's key/value

but it looks like new clojure.spec use sequential? for s/+ therefore doesn't allow hash-maps

what should I do?

that spec is actually used to describe a flexible dsl composed of vectors and hash-maps (the dsl itself is used as part of om.next queries)

I can't think of any viable workaround

also, is there any reason clojure.spec use sequential? there instead of coll? which is almost identical except that it returns true for sets and maps?

@myguidingstar Why not just use (s/map-of keyword? boolean?)

(it took me a while to read your spec -- what does s/or even mean with just one named branch?)

is it possible to have a recursive spec?

Yes.

@seancorfield yup, that s/or is for named branch

I need to tag the key and value, hence the use of s/cat

so s/map-of doesn't work for me

that spec's purpose is to used with s/conform, kinda like a dsl parser, not just to check validation

@myguidingstar I wonder if (s/and map? seq (s/+ ...)) would make it so what you need?

I have specd a domain entity in my application and have to read instances encoded as JSON where the keys are without namespaces. What's the recommended way to validate and convert the JSON encoded instances to the internal representation?