an implementation of eRuby

ex.

  input = <<'END'
   <ul>
    <% for item in @list %>
     <li><%= item %>
         <%== item %></li>
    <% end %>
   </ul>
  END
  list = ['<aaa>', 'b&b', '"ccc"']
  eruby = Erubis::Eruby.new(input)
  puts "--- code ---"
  puts eruby.src
  puts "--- result ---"
  context = Erubis::Context.new()   # or new(:list=>list)
  context[:list] = list
  puts eruby.evaluate(context)

result:

  --- source ---
  _buf = ''; _buf << '<ul>
  ';  for item in @list
   _buf << '  <li>'; _buf << ( item ).to_s; _buf << '
  '; _buf << '      '; _buf << Erubis::XmlHelper.escape_xml( item ); _buf << '</li>
  ';  end
   _buf << '</ul>
  ';
  _buf.to_s
  --- result ---
   <ul>
     <li><aaa>
         &lt;aaa&gt;</li>
     <li>b&b
         b&amp;b</li>
     <li>"ccc"
         &quot;ccc&quot;</li>
   </ul>