正则表达式提取子字符串（。）*

Question

I am trying to match with the following regex.

\d{11}(.*)

Which is any 11 digits followed by a string. I want to extract the tailing string whatever it is.

I used RE2::FullMatch but it gives the first half (the 11 digits). How to get the sub-string matched with (.*) ?

string subStr
RE2::FullMatch("<sip:+19073381121@216.67.108.201:5060;user=phone>;npi=ISDN",(<sip:\+(\d{11}))(.*), &subStr);

I am trying to extract everything starting from @ in above string. Basically I want what matches to (.*) but the above function returns <sip:+19073381121 .

I am not very familiar with regex but I looked at different APIs to extract substrings and found this one usefull

Answer 1

从正则表达式中删除多余的捕获组。

<sip:\+\d{11}(.*)

Answer 2

To get the sub string matched with (.*) use $1. That is the first capturing group that you specified with the brackets.