在emacs regexp中使用“M-x发生”的“或”运算符

Question

I've wanted to get an overview of my Python program, so I ran:

Mx occur

and for the regexp I've supplied

(def)|(class)

which failed to match anything.

I've also looked at this post, and tried

(def)\\\\|(class)

but this failed to match anything either...

How do I get Mx occur to match class or def ?

Answer 1

你必须使用单反斜杠（没有括号，或者你也应该转义括号）：

def\|class