tifier">type</span> 
  <span class="identifier">extract_or_default</span><span class="special">(</span><a class="link" href="attribute_name.html" title="Class attribute_name">attribute_name</a> <span class="keyword">const</span> <span class="special">&amp;</span> name<span class="special">,</span> <span class="identifier">record</span> <span class="keyword">const</span> <span class="special">&amp;</span> rec<span class="special">,</span> 
                     <span class="identifier">DefaultT</span> <span c