n class="identifier">m_FormattingStream</span><span class="special">;</span>  <span class="comment">// Formatting stream. </span>
  <span class="identifier">formatter_type</span> <span class="identifier">m_Formatter</span><span class="special">;</span>  <span class="comment">// Formatter functor. </span>
<span class="special">}</span><span class="special">;</span></pre></div>
<div class="refsect1">
<a name="idm64491"></a><h2>Description</h2>
<div class="refsect2">
<a name="idm64493"></a><h3>
<a name="boost.