Merge branch 'boost_no_cxx11_sfinae_expr' of https://github.com/glenfe/config into pr114

# Fixed Conflicts:
#	checks/Jamfile.v2
#	checks/test_case.cpp
#	test/all/Jamfile.v2
#	test/config_test.cpp

Also added some more documentation to tie together the various SFINAE macros.  Regenerated the docs.

doc/html/boost_config/boost_macro_reference.html

@@ -517,7 +517,7 @@
                   is covered by <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#337" target="_top">Core
                   Language DR337</a>, but is not part of the current standard.
                   Fortunately most compilers that support SFINAE also support this
-                  DR.
+                  DR. See also BOOST_NO_SFINAE and BOOST_NO_SFINAE_EXPR
                 </p>
               </td>
 </tr>
@@ -864,7 +864,8 @@
 <td>
                 <p>
                   The compiler does not support the "Substitution Failure Is
-                  Not An Error" meta-programming idiom.
+                  Not An Error" meta-programming idiom. This is the lightweight
+                  pre-C++11 version of SFINAE.
                 </p>
               </td>
 </tr>
@@ -882,6 +883,8 @@
 <td>
                 <p>
                   The compiler does not support usage of SFINAE with arbitrary expressions.
+                  This is the post-C++11 SFINAE, but excludes a few specific corner
+                  cases, see also BOOST_NO_CXX11_SFINAE_EXPR.
                 </p>
               </td>
 </tr>
@@ -3073,6 +3076,22 @@
               </td>
 </tr>
 <tr>
+<td>
+                <p>
+                  <code class="computeroutput"><span class="identifier">BOOST_NO_CXX11_SFINAE_EXPR</span></code>
+                </p>
+              </td>
+<td>
+                <p>
+                  The compiler does not support usage of C++11 SFINAE with arbitrary
+                  expressions. Use this macro only if you are using all of the features
+                  of SFINAE including substitution-failure-on-private-member-access.
+                  Otherwise use BOOST_NO_SFINAE_EXPR or BOOST_NO_SFINAE which get
+                  defined for fewer compilers.
+                </p>
+              </td>
+</tr>
+<tr>
 <td>
                 <p>
                   <code class="computeroutput"><span class="identifier">BOOST_NO_CXX11_SMART_PTR</span></code>

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: February 05, 2017 at 19:01:00 GMT</small></p></td>
+<td align="left"><p><small>Last revised: February 05, 2017 at 19:27:06 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>