Find all links inside a HTML source using Google RE2

Here is a small code to show you how to find all links inside a HTML source code using Google's Regular Expression library (RE2) :

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string text=" html source goes here <a href='http://google.com/top-l/?search=xyz&x=t'>site link</a> testing <a   href= '../news/show?id=4'>ms</a>";

 re2::RE2 linksre("<a[\s\w]*href=\s*'([\w:/{1,2}.\?=\-&%]*)'[\s\w]*>");

string res;

re2::StringPiece html(text);

while(RE2::FindAndConsume(&html, linksre ,&res))

{

cout << "("<<res<<")"<<endl;

}

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output is :

(http://google.com/top-l/?search=xyz&x=t)

(../news/show?id=4)