绑定块内的停车会移除动态绑定变量的当前值。
例子
`
(require '[clojure.core.async :as async :refer [go <!]])</p>
(def ^:dynamic d)
(go
(binding [d :bound]
(println d)
(<! (async/timeout 10))
(println d)))
`
这里是输出
`
:bound
对象[clojure.lang.Var$Unbound 0x15f8a952 Unbound: #'user/d]
`