terator&gt;::value_type</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;            &gt;::value</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;        &gt;::type* <span class="comment">/*dummy*/</span> = <span class="keyword">nullptr</span>)</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    {</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;        <a class="code" hre