仅当不存在其他字符时，RegEx才匹配结束字符

Question

I'm having quite some trouble to define a regEx that I'm needing....

Basically the idea is to detect all lines that end with a , or a ; character. For this I have defined the following regex:

(,|;)$

Which works fine for this, but then I have the exception that if there's a * character within that line (not necessarily starting with, but at some position), then I don't want to detect that match. Based on this sample:

/**
 * Here there's a comment I don't want to find,
 * but after this comment I do
 */
detectMe;
other,

I would intend to find 2 groups, the first one

/**
 * Here there's a comment I don't want to find,
 * but after this comment I do
 */
detectMe;

And the second one

other,

I've tried many things such as non capturing groups, negative looks ahead and also start of a string with [^\\s*\\*] with no success. Is there a way to do this?

Some of the regEx I've tried...

^[^\*](.*?)(,|;)$
^[^\s*\*](.*?)(,|;)$

Answer 1

To match an optional C comment and the following line ending with ; or , you may use

/(?:\/\*+[^*]*\*+(?:[^\/*][^*]*\*+)*\/\r?\n)?.*[;,]$/gm

See this regex demo

Details

• (?:\\/\\*+[^*]*\\*+(?:[^\\/*][^*]*\\*+)*\\/\\r?\\n)? - an optional (as there is a ? quantifier after the group) non-capturing group matching 1 or 0 occurrences of
  • \\/\\*+[^*]*\\*+(?:[^\\/*][^*]*\\*+)*\\/ - a C comment pattern
  • \\r?\\n - a CRLF or LF ending
• .*[;,]$ - a whole line that ends with ; or , ( $ is the end of a line anchor here due to m modifier).

Answer 2

You can use this regex:

/^[^*]*?[,;]$/gm

It will start by mathing any number of characters not being ' * ', then match ' , ' or ' ; ' at the end of the line. It uses the global and multiline flags to match all lines.