检测递归调用(Detecting recursive calls)

检测递归调用(Detecting recursive calls)

检测递归方法调用的最佳方法是什么？ 也许，它可以制成这种格式：

def foo if some_code_to_detect_recursive_call ... else ... end end

我可以想一种解析caller信息的方法，但我有兴趣看看是否有更好的方法。

What is the best way to detect recursive method calls? Perhaps, it can be made into this format:

def foo if some_code_to_detect_recursive_call ... else ... end end

I can think of a way parsing the caller information, but I am interested in seeing if there are better ways.

最满意答案

只需在输入方法后递增计数器（实例或全局变量），然后在退出时递减计数器。

在输入时，计数器会告诉您递归级别。

Just increment a counter (an instance or global variable) after entry to your method and decrement it on exit.

At entry, the counter tells you your recursion level.