[range] fixed #6212 (missing step in documentation for how to write a range adaptor)

[SVN r82314]

doc/html/index.html

@@ -147,7 +147,7 @@
   </p>
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><p><small>Last revised: January 02, 2013 at 05:22:10 GMT</small></p></td>
+<td align="left"><p><small>Last revised: January 02, 2013 at 07:48:08 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>

doc/html/range/reference/extending/method_3/method_3_1.html

@@ -81,6 +81,14 @@
 <span class="special">{</span>
 	<span class="keyword">return</span> <span class="identifier">reverse_range</span><span class="special">&lt;</span><span class="keyword">const</span> <span class="identifier">BidirectionalRng</span><span class="special">&gt;(</span> <span class="identifier">r</span> <span class="special">);</span>
 <span class="special">}</span>
+</pre>
+              </li>
+<li class="listitem">
+                Declare the adaptor itself (it is a variable of the tag type).
+<pre class="programlisting"><span class="keyword">namespace</span>
+<span class="special">{</span>
+    <span class="keyword">const</span> <span class="identifier">detail</span><span class="special">::</span><span class="identifier">reverse_forwarder</span> <span class="identifier">reversed</span> <span class="special">=</span> <span class="identifier">detail</span><span class="special">::</span><span class="identifier">reverse_forwarder</span><span class="special">();</span>
+<span class="special">}</span>
 </pre>
               </li>
 </ol></div>

doc/reference/extending.qbk

@@ -218,6 +218,14 @@ operator|( const BidirectionalRng& r, detail::reverse_forwarder )
 }
 ``
 
+# Declare the adaptor itself (it is a variable of the tag type).
+``
+namespace
+{
+    const detail::reverse_forwarder reversed = detail::reverse_forwarder();
+}
+``
+
 [endsect]
 
 [section:method_3_2 Method 3.2: Implement a Range Adaptor with arguments]