Seperate string by comma ignoring commas inside brackets

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My Input String :
"int, float(2,3), varchar(20)"

Output:

int
float(2,3)
varchar(20)

I need each word separated by a comma(,) ignoring the commas inside brackets. Can anyone give the proper regex to do this especially in c++?

!without deleting the brackets

What I have tried:

std::string text = "int, float(2,3), varchar(20)";
std::regex re(R"(\}? +, +(?![^{]*\})\{?)");
std::sregex_token_iterator it(text.begin(), text.end(), re, -1);
std::sregex_token_iterator end;

output:

int
float(2,3
varchar(20

Posted 10-Jul-22 5:37am

Rivki Sorotzkin

Updated 10-Jul-22 5:56am

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OriginalGriff · Answer 1 · 2022-07-10T05:56:00

The regex you show won't do anything like that.

Try this:

(.+?\(.*?\))|(.+?(,|$))

It may not be exactly what you wanted, but it's a better start than you have.

If you are going to play with regexes, then get a copy of Expresso[^] - it's free, and it examines and generates Regular expressions.
But ... I'd strongly suggest that you use a tokenizer instead of a regex - software languages get very complex very quickly, and modifying complex regexes can get to be a very frustrating way to spend a lot of time! Regular expressions are a good tool, but so is a hammer, until you realize it's a screw you are trying to secure rather than a nail.