title: How to negate the whole regex?
body: <p>I have a regex, for example <code>(ma|(t){1})</code>. It matches <code>ma</code> and <code>t</code> and doesn't match <code>bla</code>.</p>
  
  <p>I want to negate the regex, thus it must match <code>bla</code> and not <code>ma</code> and <code>t</code>, <strong>by adding something to this regex</strong>. I know I can write <code>bla</code>, the actual regex is however more complex.</p>