regex string between comma or parenthese but not contains dot

Question

my goal is to have a regex, witch captures the following:

• any strings between '(' and ',' boundaries excluding
• any strings between ',' and ',' boundaries excluding
• any strings between ',' and ')' boundaries excluding
• the founded substring doesn't contain any dots

F. e.:

• '(xxxx,' => valid
• '(xxxx)' => valid
• '(xxx.yyy,' => invalid

For the substring excluding the boundaries I have this regex:

(?<=[\(\,])(.*?)(?=[\)\,])

It works fine.

Now I wanted to extend it to deny any strings containing dot like this:

(?<=[\(\,])((?!\.).*?)(?=[\)\,])

But it doesnt' filter out the strings with dot, f. e. this remains valid:

'(xxxx.yyyy)'

How should I adjust the regex?

Thanks.

Answer 1

Use

(?<=[(,])[^(),.]*(?=[),])

See proof.

Explanation

NODE	EXPLANATION
(?<=	look behind to see if there is:
[(,]	any character of: '(', ','
)	end of look-behind
[^(),.]*	any character except: '(', ')', ',', '.' (0 or more times (matching the most amount possible))
(?=	look ahead to see if there is:
[),]	any character of: ')', ','
)	end of look-ahead

Answer 2

You may use this regex with a negated character class:

(?<=[(,])([^.]*?)(?=[),])

[^.] will match any character that is not a dot.

Also note that there is no need to escape characters like (, ). , etc inside a character class i.e. [...]