字符串中的注释和注释中的字符串 [英] Comments in string and strings in comments

问题描述

我正在尝试使用 Python 和 Regex 计算 C 代码中包含的注释中的字符数，但没有成功.我可以先删除字符串以删除字符串中的注释，但这也会删除注释中的字符串，结果会很糟糕.是否有机会通过使用正则表达式来不匹配注释中的字符串，反之亦然?

I am trying to count characters in comments included in C code using Python and Regex, but no success. I can erase strings first to get rid of comments in strings, but this will erase string in comments too and result will be bad ofc. Is there any chance to ask by using regex to not match strings in comments or vice versa?

推荐答案

不，不是真的.

正则表达式不是解析您所描述的嵌套结构的正确工具；相反，您将需要解析 C 语法(或您感兴趣的哑子子集")，并且您可能会发现正则表达式对此很有帮助.一个相对简单的具有三个状态(CODE、STRING、COMMENT)的状态机就可以做到.

Regex is not the correct tool to parse nested structures like you describe; instead you will need to parse the C syntax (or the "dumb subset" of it you're interested in, anyway), and you might find regex helpful in that. A relatively simple state machine with three states (CODE, STRING, COMMENT) would do it.

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