cljs.spec.alpha/merge

macro

previously cljs.spec/merge

clojure.spec.alpha/merge

Edit

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Source docstring:

Takes map-validating specs (e.g. 'keys' specs) and
returns a spec that returns a conformed map satisfying all of the
specs.  Successive conformed values propagate through rest of
predicates. Unlike 'and', merge can generate maps satisfying the
union of the predicates.

(defmacro merge
  [& pred-forms]
  `(merge-spec-impl '~(mapv #(res &env %) pred-forms) ~(vec pred-forms) nil))

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