c++ regex convert regex to c++ code -

first time regex (in c++ is)

i have hard time writing

(?<=name=")(?:[^\\"]+|\\.)*(?=") 

that matches example name="blabla" xyz blabla code... how i

std::regex  thename("(?<=name=")(?:[^\\"]+|\\.)*(?=")"); 

correctly please?

you need use capturing rather positive lookbehind in c++ regex. also, advisable use unroll-the-loop principle unroll ([^"\\]|\\.)* subpattern make regex fast can be, see [^\"\\]*(?:\\.[^\"\\]*)*. also, advisable use raw string literals (see r"(<pattern>)") when defining regex patterns in order avoid overescaping.

see c++ demo:

#include <iostream> #include <regex> using namespace std;  int main() {     std::string s = "name=\"bla \\\"bla\\\"\"";     std::regex thename(r"(name=\"([^\"\\]*(?:\\.[^\"\\]*)*)\")");     std::smatch m;     if (regex_search(s, m, thename)) {             std::cout << m[1].str() << std::endl;     }     return 0; } 

result: bla \"bla\"