谁能解释一下,下面的例子有什么问题?为什么会抛出 StackOverflowError 异常?
(s/def ::tag keyword?)
(s/def ::s string?)
(s/def ::n number?)
(s/def ::g
(s/cat :tag (s/? ::tag)
:ex (s/alt :string ::s
:number ::n
:and (s/+ ::g)
)))
(s/conform ::g '["abc"])