ass="identifier">lexer</span><span class="special">&lt;</span><span class="identifier">Lexer</span><span class="special">&gt;</span>
<span class="special">{</span>
      <span class="identifier">example_tokens</span><span class="special">()</span>
      <span class="special">{</span>
          <span class="comment">// your token definitions here</span>
          <span class="keyword">this</span><span class="special">-&gt;</span><span class="identifier">self</span> <span class="special">=</span> <span class=