c++ string pattern replacement

replace_all.cpp

// from http://stackoverflow.com/questions/2896600/how-to-replace-all-occurrences-of-a-character-in-string

// std::string tmp = ReplaceAll(description, std::string("%"), name);

std::string ReplaceAll(std::string str, const std::string& from, const std::string& to) {
   size_t start_pos = 0;
   while((start_pos = str.find(from, start_pos)) != std::string::npos) {
      str.replace(start_pos, from.length(), to);
      start_pos += to.length(); // Handles case where 'to' is a substring of 'from'
   }
   return str;
}