cljs.spec/?

MOVED, please see cljs.spec.alpha/?
macroremoved v1.9.542added v1.9.14Edit
(? pred-form)
Source docstring:
Returns a regex op that matches zero or one value matching
pred. Produces a single value (not a collection) if matched.
Source code @ clojurescript:src/main/cljs/cljs/spec.cljc
(defmacro ?
  [pred-form]
  `(maybe-impl ~pred-form '~pred-form))