diff --git a/doc/html/boost_config/boost_macro_reference.html b/doc/html/boost_config/boost_macro_reference.html
index 6c0cf00d..bd57de21 100644
--- a/doc/html/boost_config/boost_macro_reference.html
+++ b/doc/html/boost_config/boost_macro_reference.html
@@ -3250,6 +3250,20 @@
               </td>
 </tr>
 <tr>
+<td>
+                <p>
+                  <code class="computeroutput"><span class="identifier">BOOST_NO_CXX11_UNRESTRICTED_UNION</span></code>
+                </p>
+              </td>
+<td>
+                <p>
+                  The compiler does not support an unrestricted union. This is a
+                  union that may contain static data as well as user-defined member
+                  data with non-trivial special member functions.
+                </p>
+              </td>
+</tr>
+<tr>
 <td>
                 <p>
                   <code class="computeroutput"><span class="identifier">BOOST_NO_CXX11_USER_DEFINED_LITERALS</span></code>
@@ -3977,7 +3991,8 @@
                 </p>
               </th>
 </tr></thead>
-<tbody><tr>
+<tbody>
+<tr>
 <td>
                 <p>
                   <code class="computeroutput"><span class="identifier">BOOST_INLINE_VARIABLE</span></code>
@@ -3991,7 +4006,35 @@
                   for further adjustments to the code.
                 </p>
               </td>
-</tr></tbody>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput"><span class="identifier">BOOST_IF_CONSTEXPR</span></code>
+                </p>
+              </td>
+<td>
+                <p>
+                  Expands to <code class="computeroutput"><span class="keyword">if</span> <span class="keyword">constexpr</span></code>
+                  when supported, or <code class="computeroutput"><span class="keyword">if</span></code>
+                  otherwise.
+                </p>
+              </td>
+</tr>
+<tr>
+<td>
+                <p>
+                  <code class="computeroutput"><span class="identifier">BOOST_INLINE_CONSTEXPR</span></code>
+                </p>
+              </td>
+<td>
+                <p>
+                  This is a shortcut for <code class="computeroutput"><span class="identifier">BOOST_INLINE_VARIABLE</span>
+                  <span class="identifier">BOOST_CONSTEXPR_OR_CONST</span></code>.
+                </p>
+              </td>
+</tr>
+</tbody>
 </table></div>
 </div>
 <div class="section">
diff --git a/doc/html/boost_config/guidelines_for_boost_authors.html b/doc/html/boost_config/guidelines_for_boost_authors.html
index f57e583e..b61ee694 100644
--- a/doc/html/boost_config/guidelines_for_boost_authors.html
+++ b/doc/html/boost_config/guidelines_for_boost_authors.html
@@ -297,9 +297,9 @@
         and name the test file "<code class="computeroutput"><span class="identifier">boost_has_foo</span><span class="special">.</span><span class="identifier">ipp</span></code>".
         Try not to add feature test macros unnecessarily, if there is a platform
         specific macro that can already be used (for example <code class="computeroutput"><span class="identifier">_WIN32</span></code>,
-        <code class="computeroutput"><span class="identifier">__BEOS__</span></code>, or <code class="computeroutput"><span class="identifier">__linux</span></code>) to identify the feature then use
-        that. Try to keep the macro to a feature group, or header name, rather than
-        one specific API (for example <code class="computeroutput"><span class="identifier">BOOST_HAS_NL_TYPES_H</span></code>
+        <code class="computeroutput"><span class="identifier">__BEOS__</span></code>, or <code class="computeroutput"><span class="identifier">__linux__</span></code>) to identify the feature then
+        use that. Try to keep the macro to a feature group, or header name, rather
+        than one specific API (for example <code class="computeroutput"><span class="identifier">BOOST_HAS_NL_TYPES_H</span></code>
         rather than <code class="computeroutput"><span class="identifier">BOOST_HAS_CATOPEN</span></code>).
         If the macro describes a POSIX feature group, then add boilerplate code to
         <a href="../../../../../boost/config/detail/suffix.hpp" target="_top">&lt;boost/config/detail/suffix.hpp&gt;</a>
diff --git a/doc/html/index.html b/doc/html/index.html
index 88c3b169..27d9289b 100644
--- a/doc/html/index.html
+++ b/doc/html/index.html
@@ -990,7 +990,7 @@
 </div>
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><p><small>Last revised: October 29, 2019 at 16:54:06 GMT</small></p></td>
+<td align="left"><p><small>Last revised: March 23, 2020 at 21:06:56 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>