Implement LWG#2518 - Non-member swap for propagate_const should call member swap

llvm-svn: 327005

Author: mclow

libcxx/include/experimental/propagate_const

@@ -463,8 +463,7 @@ template <class _Tp>
 _LIBCPP_INLINE_VISIBILITY
 _LIBCPP_CONSTEXPR void swap(propagate_const<_Tp>& __pc1, propagate_const<_Tp>& __pc2) _NOEXCEPT_(__is_nothrow_swappable<_Tp>::value)
 {
-  using _VSTD::swap;
-  swap(_VSTD_LFTS_V2::get_underlying(__pc1), _VSTD_LFTS_V2::get_underlying(__pc2));
+  __pc1.swap(__pc2);
 }
 
 template <class _Tp>

libcxx/www/cxx1z_status.html

@@ -375,7 +375,7 @@ <h3>Library Working group Issues Status</h3>
 	<tr><td><a href="https://wg21.link/LWG2503">2503</a></td><td>multiline option should be added to syntax_option_type</td><td>Issaquah</td><td></td></tr>
 	<tr><td><a href="https://wg21.link/LWG2510">2510</a></td><td>Tag types should not be DefaultConstructible</td><td>Issaquah</td><td></td></tr>
 	<tr><td><a href="https://wg21.link/LWG2514">2514</a></td><td>Type traits must not be final</td><td>Issaquah</td><td>Complete</td></tr>
-	<tr><td><a href="https://wg21.link/LWG2518">2518</a></td><td>[fund.ts.v2] Non-member swap for propagate_const should call member swap</td><td>Issaquah</td><td></td></tr>
+	<tr><td><a href="https://wg21.link/LWG2518">2518</a></td><td>[fund.ts.v2] Non-member swap for propagate_const should call member swap</td><td>Issaquah</td><td>Complete</td></tr>
 	<tr><td><a href="https://wg21.link/LWG2519">2519</a></td><td>Iterator operator-= has gratuitous undefined behaviour</td><td>Issaquah</td><td>Complete</td></tr>
 	<tr><td><a href="https://wg21.link/LWG2521">2521</a></td><td>[fund.ts.v2] weak_ptr's converting move constructor should be modified as well for array support</td><td>Issaquah</td><td></td></tr>
 	<tr><td><a href="https://wg21.link/LWG2525">2525</a></td><td>[fund.ts.v2] get_memory_resource should be const and noexcept</td><td>Issaquah</td><td></td></tr>
@@ -504,7 +504,7 @@ <h3>Library Working group Issues Status</h3>
 <!-- 	<tr><td></td><td></td><td></td><td></td></tr> -->
   </table>
 
-  <p>Last Updated: 12-Feb-2018</p>
+  <p>Last Updated: 8-Mar-2018</p>
 </div>
 </body>
 </html>