N3922: direct-list-initialization of an auto-typed variable no longer deduces a
std::initializer_list<T> type. Instead, the list must contain a single element
and the type is deduced from that.
In Clang 3.7, we warned by default on all the cases that would change meaning
due to this change. In Clang 3.8, we will support only the new rules -- per
the request in N3922, this change is applied as a Defect Report against earlier
versions of the C++ standard.
This change is not entirely trivial, because for lambda init-captures we
previously did not track the difference between direct-list-initialization and
copy-list-initialization. The difference was not previously observable, because
the two forms of initialization always did the same thing (the elements of the
initializer list were always copy-initialized regardless of the initialization
style used for the init-capture).
llvm-svn: 252688
diff --git a/clang/www/cxx_status.html b/clang/www/cxx_status.html
index 667f0c2..2ba262c 100644
--- a/clang/www/cxx_status.html
+++ b/clang/www/cxx_status.html
@@ -564,33 +564,33 @@
<tr>
<td>New <tt>auto</tt> rules for direct-list-initialization
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3922.html">N3922</a></td>
- <td class="none" align="center">No</td>
+ <td class="svn" align="center">Clang 3.8 <a href="#n3922">(7)</a></td>
</tr>
<!-- Urbana papers -->
<tr>
<td>Fold expressions</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4295.html">N4295</a></td>
- <td class="svn" align="center">Clang 3.6</td>
+ <td class="full" align="center">Clang 3.6</td>
</tr>
<tr>
<td><tt>u8</tt> character literals</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4267.html">N4267</a></td>
- <td class="svn" align="center">Clang 3.6</td>
+ <td class="full" align="center">Clang 3.6</td>
</tr>
<tr>
<td>Nested namespace definition</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4230.html">N4230</a></td>
- <td class="svn" align="center">Clang 3.6</td>
+ <td class="full" align="center">Clang 3.6</td>
</tr>
<tr>
<td>Attributes for namespaces and enumerators</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4266.html">N4266</a></td>
- <td class="svn" align="center">Clang 3.6</td>
+ <td class="full" align="center">Clang 3.6</td>
</tr>
<tr>
<td>Allow constant evaluation for all non-type template arguments</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4268.html">N4268</a></td>
- <td class="svn" align="center">Clang 3.6</td>
+ <td class="full" align="center">Clang 3.6</td>
</tr>
<!-- Kona papers -->
<tr>
@@ -615,6 +615,14 @@
</tr>
</table>
+<p>
+<span id="n3922">(7): This is a backwards-incompatible change that is applied to
+all language versions that allow type deduction from <tt>auto</tt>
+(per the request of the C++ committee).
+In Clang 3.7, a warning is emitted for all cases that would change meaning.
+</span>
+</p>
+
<h2 id="ts">Technical specifications and standing documents</h2>
<p>ISO C++ also publishes a number of documents describing additional language
@@ -636,7 +644,7 @@
</td>
</tr>
<tr>
- <td class="svn" align="center">
+ <td class="full" align="center">
Clang 3.6 (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4200">N4200</a>)</a>
</td>
</tr>