re2 C++ replace (GlobalReplace) minimal example

This minimal example shows how to replace strings using the re2 GlobalReplace() function:

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

using namespace re2;
using namespace std;

// Pre-compiled regex
RE2 myRegex("\\$[^\\$]+\\$");

int main(int argc, char** argv) {
    string myString = "This string $abc123$ contains two formulas $123 != 456$.";
    // NOTE: This will modify myString!
    RE2::GlobalReplace(&myString, myRegex, "FORMULA");
    // Prints "This string FORMULA contains two formulas FORMULA."
    cout << myString << endl;
}