Writing a Regex pattern c++ - c++

Question

I need help completing this regex pattern.
Here is the full string:
INSERT((1574,"Greene County, Missouri",mo,50,29,77,05000US29077,285449),geography)
Here is the portion of the string I am trying to search for using regex_search:
(1574,"Greene County, Missouri",mo,50,29,77,05000US29077,285449)
Here is my regex pattern and code:
regex pattern2("\\(|[0-9]|[a-z]|[A-Z]|\,|\"|");
regex_search (substring,matcher,pattern2);
for(auto x:matcher)
{
substring1 = matcher.suffix().str();
cout << substring1 << endl;
}
substring will output:
1574,"Greene County, Missouri",mo,50,29,77,05000US29077,285449),geography)
So not what I need. Would appreciate some help.

Answer 1

To match (1574,"Greene County, Missouri",mo,50,29,77,05000US29077,285449) you can use a capturing group and a negated character class.
[^*()\r\n]+\((\([^()\r\n]+\))[^()\r\n]+\)
In parts
[^*()\r\n]+ Match 1+ times any char except the listed
\( Match first opening parenthesis
( Capture group 1
\( Match second opening parenthesis
[^()\r\n]+ Match 1+ times any char except the listed
\) Close second opening parenthesis
) Close group 1
[^()\r\n]+
\) Close first opening parenthesis
Regex demo
You could also make the pattern more restrict by using repeating non capturing groups and use the allowed characters from the character classes that you intended to use:
[a-zA-Z0-9]+\(\(((?:[a-zA-Z0-9]+|"[a-zA-Z0-9]+(?:,? [a-zA-Z0-9]+)+")(?:,(?:[a-zA-Z0-9]+|"[a-zA-Z0-9]+(?:,? [a-zA-Z0-9]+)+"))+)\),[a-zA-Z0-9]+\)
Regex demo