<%- comment = if current.respond_to? :comment_location then

            current.comment_location
          else
            current.comment
          end
table = current.parse(comment).table_of_contents.dup

if table.length > 1 then %>

<div class=“nav-section”>

<h3>Table of Contents</h3>

  <%- display_link = proc do |heading| %>
    <a href="#<%= heading.label current %>"><%= heading.plain_html %></a>
  <%- end %>

  <%- list_siblings = proc do %>
    <%- level = table.first&.level %>
    <%- while table.first && table.first.level >= level %>
      <%- heading = table.shift %>
      <%- if table.first.nil? || table.first.level <= heading.level %>
        <li><% display_link.call heading %></li>
      <%- else %>
        <li>
          <details open>
            <summary><%- display_link.call heading %></summary>
            <ul class="link-list" role="directory">
              <% list_siblings.call %>
            </ul>
          </details>
        </li>
      <%- end %>
    <%- end %>
  <%- end %>

<ul class="link-list" role="directory">
  <% list_siblings.call %>
</ul>

</div> <%- end %>