python - 使用 python 从源文件中剥离 C/C++ 注释

Question

我有一个忽略以/* ... */开头的多行注释的正则表达式但不适用于以//

开头的行

有人可以建议在此正则表达式中添加什么以使其忽略

pattern = r"""
                        ##  --------- COMMENT ---------
       /\*              ##  Start of /* ... */ comment
       [^*]*\*+         ##  Non-* followed by 1-or-more *'s
       (                ##
         [^/*][^*]*\*+  ##
       )*               ##  0-or-more things which don't start with /
                        ##    but do end with '*'
       /                ##  End of /* ... */ comment
     |                  ##  -OR-  various things which aren't comments:
       (                ## 
                        ##  ------ " ... " STRING ------
         "              ##  Start of " ... " string
         (              ##
           \\.          ##  Escaped char
         |              ##  -OR-
           [^"\\]       ##  Non "\ characters
         )*             ##
         "              ##  End of " ... " string
       |                ##  -OR-
                        ##
                        ##  ------ ' ... ' STRING ------
         '              ##  Start of ' ... ' string
         (              ##
           \\.          ##  Escaped char
         |              ##  -OR-
           [^'\\]       ##  Non '\ characters
         )*             ##
         '              ##  End of ' ... ' string
       |                ##  -OR-
                        ##
                        ##  ------ ANYTHING ELSE -------
         .              ##  Anything other char
         [^/"'\\]*      ##  Chars which doesn't start a comment, string
       )                ##    or escape
    """

Answer 1

如果您计划使用当前的正则表达式，可以执行以下操作来匹配 //... 注释:

在此之下:

 /                ##  End of /* ... */ comment

添加这个:

 |                  ## OR it is a line comment with //
  \s*//.*           ## Single line comment

参见 demo