如何修改此正则表达式以匹配所有三种情况？

Question

I want to test if a method appears in a header file. These are the three cases I have:

void aMethod(params ...)
//void aMethod(params
// void aMethod(params
  ^ can have any number of spaces here

Here's what I have so far:

re.search("(?<!\/\/)\s*void aMethod",buffer)

Buf this will only match the first case, and the second. How could I tweak it to have it match the third too?

EDIT:sorry, but I didn't express myself correctly. I only want to match if not within a comment. So sorry.

Answer 1

编辑：好的，编辑后，地理位置，是这样的：

^(?<!\/\/)\s*void aMethod

Answer 2

If you simply want to find all appearances for 'void aMethod(params' then you can use the following:

a = """void aMethod(params ...)
//void aMethod(params
// void aMethod(params
  ^ can have any number of spaces here"""
from re import findall
findall(r'\bvoid aMethod\b', a)

OR:

findall(r'(?:\/\/)?[ ]*void aMethod', a)

Answer 3

试试这个正则表达式。

(\/\/)?\s*void aMethod

Answer 4

对于三个选项： (?:\\/\\/)?\\s*void aMethod