I can use Xpressive of the Boost library to do some regex replacement like this:
#include <iostream>
#include <boost/xpressive/xpressive.hpp>
void replace(){
std::string in("a(bc) de(fg)");
sregex re = +_w >> '(' >> (s1= +_w) >> ')';
std::string out = regex_replace(in,re,"$1");
std::cout << out << std::endl;
}
What I need is to replace the captured part by the result of a certain transformation function like e.g.
std::string modifyString(std::string &in){
std::string out(in);
std::reverse(out.begin(),out.end());
return out;
}
so the result of the example provided above would be cb gf.
What do you think would be the best approach to realize this?
Thanks in advance!
Use
std::string modifyString(const smatch& match){
std::string out(match[1]);
std::reverse(out.begin(),out.end());
return out;
}
void replace(){
std::string in("a(bc) de(fg)");
sregex re = +_w >> '(' >> (s1= +_w) >> ')';
std::string out = regex_replace(in, re, modifyString);
std::cout << out << std::endl;
}
In documentation there is all about regex_replace
function view Desctiption/Requires