问题描述
以下两个代码产生不同的结果:
The following two code generate different result:
def x = try{
true
} finally false
invoke x 得到 true
invoke x gets true
def y:Boolean = try{
return true
} finally {
return false
}
调用 y 得到 false
return 版本的行为与 Java 相同.
the return version behave same as Java.
就我个人而言，我从不在 Scala 中使用return".但是很高兴知道 Scala 如何评估 try-catch-finally 块的值.谢谢.
Personally I never use 'return' in scala. But it's good to know how scala evaluate the value of a try-catch-finally block. Thanks.
推荐答案
你 不应该在finally块中有return语句(即使技术上允许，至少在Java中，例如C#禁止它).
You should not have a return statement in a finally block (even though it is technically allowed, at least in Java, C# for example forbids it).
如果 Scala 的 finally 块有一个隐式返回，那总是会破坏预期的返回值.所以这没有任何意义.
If the Scala finally block had an implicit return, that would always clobber the intended return value. So that makes no sense.
但我想如果你明确地那样写，它对你没有帮助.
But I suppose it cannot help you if you explicitly write it that way.
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