clojure - 如何在 Clojure gen-class 方法中调用父类(super class)方法？

Question

我正在尝试创建一个通过gen-class扩展输入流Clojure的类。如果我想调用父类的方法，该怎么做？

Answer 1

来自(文档生成类)¹:

:exposes-methods {super-method-name exposed-name, ...}

It is sometimes necessary to call the superclass' implementation of an
overridden method.  Those methods may be exposed and referred in 
the new method implementation by a local name.

因此，为了能够调用父级的 fooBar 方法，您可以说

(ns my.custom.Foo
  (:gen-class
    ; ...
    :exposes-methods {fooBar parentFooBar}
    ; ...
    ))

然后实现fooBar:

(defn -fooBar [this]
  (combine-appropriately (.parentFooBar this)
                         other-stuff))

<小时/>

¹ 除了 ns 表单提供的 :gen-class 工具之外，还有一个 gen-class宏。