Sample cord of re2 of PartialMatchN

re2test2.cpp

#include <iostream>
#include <string>
#include <re2/re2.h>
#include <vector>

using namespace std;

int main(){

  string str("あぶらかたぶら");
  re::RE2 re("(.ぶ)");
  re2::StringPiece input(str);  
  int groupSize = re.NumberOfCapturingGroups();
  vector<re2::RE2::Arg> argv(groupSize);
  vector<re2::RE2::Arg*> args(groupSize);  
  vector<re2::StringPiece> ws(groupSize);  
  for (int i = 0; i < groupSize; ++i) {  
    args[i] = &argv[i];  
    argv[i] = &ws[i];  
  }  
  re2::RE2::PartialMatchN(input, re, &(args[0]), groupSize);  
  cout << groupSize << endl;
  for (int i = 0; i < groupSize; ++i)  
    cout << ws[i] << endl;  
  return 0;
}