Please try whether my CLJ-2013
<https://dev.clojure.org/jira/browse/CLJ-2013> patch fixes the issue for
you. From my observation it should.
On Saturday, April 22, 2017 at 7:31:48 PM UTC+2, Yegor Timoshenko wrote:
>
> (require '[clojure.spec :as s])
> (require '[clojure.spec.test :refer [instrument]])
>
> (defn request ([url]) ([params url]))
>
> (s/fdef request
> :args (s/cat :params (s/? map?) :url string?))
>
> (instrument `request)
> (request [] "")
>
> ExceptionInfo Call to #'user/request did not conform to spec:
> In: [0] val: [] fails at: [:args :url] predicate: string?
> :clojure.spec/args ([] "")
> :clojure.spec/failure :instrument
> :clojure.spec.test/caller {:file "form-init1226863901212006294.clj",
> :line 1, :var-scope user/eval2193}
> clojure.core/ex-info (core.clj:4725)
>
> I expected that it would fail at `map?` predicate rather than at `string?`
> predicate.
> s/or produces better explanation, but at the same time is relatively more
> verbose:
>
> (require '[clojure.spec :as s])
> (require '[clojure.spec.test :refer [instrument]])
>
> (defn request ([url]) ([params url]))
>
> (s/fdef request
> :args (s/or :simple (s/cat :url string?)
> :advanced (s/cat :params map? :url string?)))
>
> (instrument `request)
> (request [] "")
>
> ExceptionInfo Call to #'user/request did not conform to spec:
> In: [0] val: [] fails at: [:args :simple :url] predicate: string?
> In: [0] val: [] fails at: [:args :advanced :params] predicate: map?
> :clojure.spec/args ([] "")
> :clojure.spec/failure :instrument
> :clojure.spec.test/caller {:file "form-init1226863901212006294.clj",
> :line 1, :var-scope user/eval2208}
> clojure.core/ex-info (core.clj:4725)
>
> Is it subject to improvement? https://dev.clojure.org/jira/browse/CLJ-1982
> might be the same issue.
>
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