title: Structure to string in elegant way
body: <p>I have structure:</p>
  
  <pre><code>struct movies_t {
    string title;
    int year;
  } 
  </code></pre>
  
  <p>I would like this structure to have behavior to show it's fields in string.</p>
  
  <pre><code>std:string toString()
  {
  return "title=" title + "year="+ itostr(year);
  }
  </code></pre>
  
  <p>I can't change struct to class since I should pass it to compiled library which code is unknown. What is the best way to implement this?</p>