[SOLVED] Does Ballerina regex replace support capture groups?

Does Ballerina regex replace support capture groups?

I want to escape / and . in a string. Ex: for foo/pets/1.2.3 the expected output is foo\/pets\/1\.2\.3

I tried the following:

regex:replaceAll("foo/pets/1.2.3", "(\\.|/)", "\\\\$1");

The output I'm getting is: foo\\$1pets\\$11\\$12\\$13

Is there a way to achieve the expected version?

Solution

As Lakshan mentioned, it seems capturing groups were not supported in the regex library, which has been deprecated. However, I was able to get the expected outcome using the lang.regexp library instead using the following code:

import ballerina/lang.regexp;
import ballerina/io;

isolated function replaceFunction(regexp:Groups groups) returns string => "\\" + groups[0].substring();

public function main() {
    string str = "foo/pets/1.2.3";
    var result = re `([//\.])`.replaceAll(str, replaceFunction);
    io:println(result); // Output: "foo\/pets\/1\.2\.3"
}