我是否需要尾随分号来消除此代码的歧义? [英] Do I need a trailing semicolon to disambiguate this code?

问题描述

如果我省略分号，此代码将无法编译.

If I omit the semicolon, this code doesn't compile.

def checkRadioButton(xml: DslBuilder): String => XmlTree = {
    val inputs = top(xml).\\*(hasLocalNameX("input"));
    { (buttonValue: String) =>
      // code omitted
    }
}

我的猜测是，如果没有分号，scalac 认为偏函数是 \\* 方法的另一个参数，而不是返回值.(它实际上不是一个偏函数，顺便说一下，它是一个全函数.)

My guess is that, without the semicolon, scalac thinks that the partial function is another argument to the \\* method, instead of the return value. (It isn't actually a partial function, by the way, it's a total function.)

这里可以不用分号吗?我以前从未在 Scala 中在行尾使用分号.

Can I do without the semicolon here? I've never had to use a semicolon at the end of a line before in Scala.

推荐答案

我会这样写:

def checkRadioButton(xml: DslBuilder): String => XmlTree = {
    val inputs = top(xml).\\*(hasLocalNameX("input"));
    (buttonValue: String) => { // <-- changed position of {
      // code omitted
    }
}

这篇关于我是否需要尾随分号来消除此代码的歧义?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！