ction, a PrimitiveParser is required to do a pre-skip. Leading
            <code class="computeroutput"><span class="identifier">skip</span></code> characters/tokens
            will be skipped prior to parsing. Only PrimitiveParsers are required
            to perform this pre-skip. This is typically carried out through a call
            to <code class="computeroutput"><span class="identifier">qi</span><span class="special">::</span><span class="identifier">skip_over</span></code>:
          </p>
<pre cla