C++ program that matches a regular expression using Google's re2 library

re2.cpp

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

using namespace std;
using namespace re2;

int main(int argc, char* args[]) {
  // not syncing C++ and C I/O is faster with simple matchings
  ios_base::sync_with_stdio(false);

  RE2 re(args[1], RE2::Latin1); // Latin1 is faster than UTF-8
  string input; getline(cin, input);
  cout << (RE2::PartialMatch(input, re) ? "" : "no ") << "match";

  return 0;
}