如何在Groovy中检查实例的类型为String还是GString

问题描述

如果变量是string或gstring类型，我想学习什么健壮的检查方法.我想它与纯Java中的有所不同:

I would like to learn what the robust way of checking, if a variable is of type string or gstring, is. I suppose it is different than in pure Java:

def var = someFunc();

if (var instanceof String || var instanceof GString) {
   String str = var;
}

我问，是因为我不想错过一个Groovy特有的功能，该功能会导致难以调试的错误.

I ask, because I do not want to be surprised that I have missed a Groovy specific feature that causes a hard to debug bug.

推荐答案

测试实例应该可以工作:

Instanceof tests should work:

assert "fasd" instanceof String
assert "${this}" instanceof GString

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