如何在Clojure gen-class方法中调用超类的方法？ [英] How to invoke superclass' method in a Clojure gen-class method?

问题描述

我正在尝试创建一个类，该类通过 gen-class 扩展输入流Clojure。如果要调用父类的方法，该怎么做？

I'm trying to create a class that extends input stream Clojure via gen-class. If I want to invoke the parent class' method, how do I do that?

推荐答案

从（ doc gen-class） 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，您会说

So, in order to be able to call the parent's fooBar method, you'd say

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

然后执行 fooBar ：

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

---

¹ 除了：gen-class ns 表格提供的$ c>工具，有一个 gen-class 宏。

这篇关于如何在Clojure gen-class方法中调用超类的方法？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！