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Stephen Hinesef822542014-07-21 00:47:37 -07006 <title>Clang - C++1z, C++14, C++11 and C++98 Status</title>
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Stephen Hinesef822542014-07-21 00:47:37 -070026<h1>C++ Support in Clang</h1>
Cedric Venet3d658642009-02-14 20:20:19 +000027<!--*************************************************************************-->
Douglas Gregor4c9b68f2009-06-27 19:33:58 +000028<p>Last updated: $Date$</p>
Cedric Venet3d658642009-02-14 20:20:19 +000029
Stephen Hines651f13c2014-04-23 16:59:28 -070030<p>Clang fully implements all published ISO C++ standards including <a
31href="#cxx11">C++11</a>, as well as the upcoming standard provisionally named <a
Stephen Hinesef822542014-07-21 00:47:37 -070032href="#cxx14">C++14</a>, and some parts of the fledgling <a
33href="#cxx17">C++1z</a> standard,
34and is considered a production-quality C++ compiler.
Stephen Hines651f13c2014-04-23 16:59:28 -070035
36<p>The Clang community is continually striving to improve C++ standards
37compliance between releases by submitting and tracking <a
38href="cxx_dr_status.html">C++ Defect Reports</a> and implementing resolutions
39as they become available.</p>
40
41<p>Experimental work is also under way to implement <a href="#ts">C++ Technical
42Specifications</a> that will help drive the future of the C++ programming
43language.</p>
44
45<p>The <a href="http://llvm.org/bugs/">LLVM bug tracker</a> contains Clang
46C++ components that track known bugs with Clang's language conformance in
47each language mode.</p>
48
Richard Smith1e409d82012-02-24 18:42:08 +000049<h2 id="cxx98">C++98 implementation status</h2>
50
Stephen Hines651f13c2014-04-23 16:59:28 -070051<p>Clang implements all of the ISO C++ 1998 standard
Douglas Gregor8c327082011-07-21 17:46:15 +000052 (including the defects addressed in the ISO C++ 2003 standard)
Stephen Hinesef822542014-07-21 00:47:37 -070053 except for <tt>export</tt> (which was removed in C++11).
Douglas Gregor57f1a002010-02-05 23:51:14 +000054
Richard Smith1e409d82012-02-24 18:42:08 +000055<h2 id="cxx11">C++11 implementation status</h2>
Chris Lattner900e32d2010-05-21 20:59:40 +000056
Stephen Hinesef822542014-07-21 00:47:37 -070057 <p>Clang 3.3 and later implement all of the <a
Richard Smithe6e68b52013-04-19 17:00:31 +000058 href="http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=50372">ISO
59 C++ 2011 standard</a>. The following table describes the Clang version
60 in which each feature became available.</p>
Chris Lattner900e32d2010-05-21 20:59:40 +000061
Richard Smith11fd5b12013-03-10 00:11:00 +000062<p>By default, Clang builds C++ code according to the C++98 standard, with many
63C++11 features accepted as extensions. You can use Clang in C++11 mode with the
64<code>-std=c++11</code> option. Clang's C++11 mode can be used
65with <a href="http://libcxx.llvm.org/">libc++</a> or with gcc's libstdc++, but
66patches are needed to make <a href="libstdc++4.4-clang0x.patch">libstdc++-4.4</a>
Richard Smithb5b37d12012-10-23 00:32:41 +000067work with Clang in C++11 mode. Patches are also needed to make
Richard Smithb6972e62013-11-05 09:12:55 +000068<a href="libstdc++4.6-clang11.patch">libstdc++-4.6</a>
Richard Smithb5b37d12012-10-23 00:32:41 +000069and <a href="libstdc++4.7-clang11.patch">libstdc++-4.7</a> work with Clang
Richard Smithe6e68b52013-04-19 17:00:31 +000070releases prior to version 3.2 in C++11 mode. <tt>thread_local</tt> support
Stephen Hines651f13c2014-04-23 16:59:28 -070071currently requires the C++ runtime library from g++-4.8 or later.</p>
Jeffrey Yasskin46ba01a2011-03-29 22:27:50 +000072
Cedric Venet3d658642009-02-14 20:20:19 +000073<table width="689" border="1" cellspacing="0">
Douglas Gregor43ac6d02011-10-14 23:21:49 +000074 <tr>
Benjamin Kramer8398bdb2011-11-05 10:11:36 +000075 <th>Language Feature</th>
Richard Smith1e409d82012-02-24 18:42:08 +000076 <th>C++11 Proposal</th>
Benjamin Kramer8398bdb2011-11-05 10:11:36 +000077 <th>Available in Clang?</th>
Douglas Gregor43ac6d02011-10-14 23:21:49 +000078 </tr>
79 <tr>
80 <td>Rvalue references</td>
81 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2118.html">N2118</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +000082 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +000083 </tr>
84 <tr>
85 <td>&nbsp;&nbsp;&nbsp;&nbsp;Rvalue references for <code>*this</code></td>
86 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2439.htm">N2439</a></td>
Benjamin Kramer8398bdb2011-11-05 10:11:36 +000087 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +000088 </tr>
89 <tr>
90 <td>Initialization of class objects by rvalues</td>
91 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1610.html">N1610</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +000092 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +000093 </tr>
94 <tr>
95 <td>Non-static data member initializers</td>
96 <td><a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2008/n2756.htm">N2756</a></td>
Benjamin Kramer8398bdb2011-11-05 10:11:36 +000097 <td class="full" align="center">Clang 3.0</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +000098 </tr>
99 <tr>
100 <td>Variadic templates</td>
101 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2242.pdf">N2242</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000102 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000103 </tr>
104 <tr>
105 <td>&nbsp;&nbsp;&nbsp;&nbsp;Extending variadic template template parameters</td>
106 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2555.pdf">N2555</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000107 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000108 </tr>
109 <tr>
110 <td>Initializer lists</td>
111 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2672.htm">N2672</a></td>
Richard Smith24fd6c82012-05-23 01:38:11 +0000112 <td class="full" align="center">Clang 3.1</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000113 </tr>
114 <tr>
115 <td>Static assertions</td>
116 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1720.html">N1720</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000117 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000118 </tr>
119 <tr>
120 <td><code>auto</code>-typed variables</td>
121 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1984.pdf">N1984</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000122 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000123 </tr>
124 <tr>
125 <td>&nbsp;&nbsp;&nbsp;&nbsp;Multi-declarator <code>auto</code></td>
126 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1737.pdf">N1737</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000127 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000128 </tr>
129 <tr>
130 <td>&nbsp;&nbsp;&nbsp;&nbsp;Removal of auto as a storage-class specifier</td>
131 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2546.htm">N2546</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000132 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000133 </tr>
134 <tr>
135 <td>&nbsp;&nbsp;&nbsp;&nbsp;New function declarator syntax</td>
136 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2541.htm">N2541</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000137 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000138 </tr>
139 <tr>
Douglas Gregor7c07e962012-02-23 03:02:32 +0000140 <td>Lambda expressions</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000141 <td><a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2927.pdf">N2927</a></td>
Richard Smith24fd6c82012-05-23 01:38:11 +0000142 <td class="full" align="center">Clang 3.1</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000143 </tr>
144 <tr>
145 <td>Declared type of an expression</td>
146 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2343.pdf">N2343</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000147 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000148 </tr>
149 <tr>
Douglas Gregor316551f2012-04-10 20:00:33 +0000150 <td>&nbsp;&nbsp;&nbsp;&nbsp;Incomplete return types</td>
151 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3276.pdf">N3276</a></td>
Richard Smith24fd6c82012-05-23 01:38:11 +0000152 <td class="full" align="center">Clang 3.1</td>
Douglas Gregor316551f2012-04-10 20:00:33 +0000153 </tr>
154 <tr>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000155 <td>Right angle brackets</td>
156 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1757.html">N1757</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000157 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000158 </tr>
159 <tr>
160 <td>Default template arguments for function templates</td>
161 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#226">DR226</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000162 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000163 </tr>
164 <tr>
165 <td>Solving the SFINAE problem for expressions</td>
166 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2634.html">DR339</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000167 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000168 </tr>
169 <tr>
170 <td>Alias templates</td>
171 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2258.pdf">N2258</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000172 <td class="full" align="center">Clang 3.0</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000173 </tr>
174 <tr>
175 <td>Extern templates</td>
176 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1987.htm">N1987</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000177 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000178 </tr>
179 <tr>
180 <td>Null pointer constant</td>
181 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2431.pdf">N2431</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000182 <td class="full" align="center">Clang 3.0</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000183 </tr>
184 <tr>
185 <td>Strongly-typed enums</td>
186 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2347.pdf">N2347</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000187 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000188 </tr>
189 <tr>
190 <td>Forward declarations for enums</td>
Richard Smithf1c66b42012-03-14 23:13:10 +0000191 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2764.pdf">N2764</a>
192 <br><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1206">DR1206</a></td>
Richard Smith24fd6c82012-05-23 01:38:11 +0000193 <td class="full" align="center">Clang 3.1</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000194 </tr>
195 <tr>
Stephen Hines651f13c2014-04-23 16:59:28 -0700196 <td>Standardized attribute syntax</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000197 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2761.pdf">N2761</a></td>
Richard Smith02344ac2013-06-17 23:54:23 +0000198 <td class="full" align="center">Clang 3.3 <a href="#n2761">(1)</a></td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000199 </tr>
200 <tr>
201 <td>Generalized constant expressions</td>
202 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2235.pdf">N2235</a></td>
Richard Smith24fd6c82012-05-23 01:38:11 +0000203 <td class="full" align="center">Clang 3.1</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000204 </tr>
205 <tr>
206 <td>Alignment support</td>
207 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2341.pdf">N2341</a></td>
Richard Smith02344ac2013-06-17 23:54:23 +0000208 <td class="full" align="center">Clang 3.3</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000209 </tr>
Stephen Hines651f13c2014-04-23 16:59:28 -0700210 <tr>
211 <td>Conditionally-support behavior</td>
212 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1627.pdf">N1627</a></td>
213 <td class="full" align="center">Clang 2.9</td>
214 </tr>
215 <tr>
216 <td>Changing undefined behavior into diagnosable errors</td>
217 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1727.pdf">N1727</a></td>
218 <td class="full" align="center">Clang 2.9</td>
219 </tr>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000220 <tr>
221 <td>Delegating constructors</td>
222 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1986.pdf">N1986</a></td>
Benjamin Kramer8398bdb2011-11-05 10:11:36 +0000223 <td class="full" align="center">Clang 3.0</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000224 </tr>
225 <tr>
226 <td>Inheriting constructors</td>
227 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2540.htm">N2540</a></td>
Richard Smith02344ac2013-06-17 23:54:23 +0000228 <td class="full" align="center">Clang 3.3</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000229 </tr>
230 <tr>
231 <td>Explicit conversion operators</td>
232 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2437.pdf">N2437</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000233 <td class="full" align="center">Clang 3.0</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000234 </tr>
235 <tr>
236 <td>New character types</td>
237 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2249.html">N2249</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000238 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000239 </tr>
240 <tr>
241 <td>Unicode string literals</td>
242 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2442.htm">N2442</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000243 <td class="full" align="center">Clang 3.0</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000244 </tr>
245 <tr>
246 <td>Raw string literals</td>
247 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2442.htm">N2442</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000248 <td class="full" align="center">Clang 3.0</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000249 </tr>
250 <tr>
Richard Smith26b75c02012-03-09 22:27:51 +0000251 <td>Universal character names in literals</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000252 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2170.html">N2170</a></td>
Richard Smith24fd6c82012-05-23 01:38:11 +0000253 <td class="full" align="center">Clang 3.1</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000254 </tr>
255 <tr>
256 <td>User-defined literals</td>
257 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2765.pdf">N2765</a></td>
Richard Smith24fd6c82012-05-23 01:38:11 +0000258 <td class="full" align="center">Clang 3.1</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000259 </tr>
260 <tr>
261 <td>Standard Layout Types</td>
262 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2342.htm">N2342</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000263 <td class="full" align="center">Clang 3.0</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000264 </tr>
265 <tr>
Douglas Gregor26bae202011-10-28 19:44:09 +0000266 <td>Defaulted functions</td>
267 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2346.htm">N2346</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000268 <td class="full" align="center">Clang 3.0</td>
Douglas Gregor26bae202011-10-28 19:44:09 +0000269 </tr>
270 <tr>
271 <td>Deleted functions</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000272 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2346.htm">N2346</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000273 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000274 </tr>
275 <tr>
276 <td>Extended friend declarations</td>
277 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1791.pdf">N1791</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000278 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000279 </tr>
280 <tr>
281 <td>Extending <code>sizeof</code></td>
Richard Smitha5ec58d2012-02-24 18:37:14 +0000282 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2253.html">N2253</a>
283 <br><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#850">DR850</a></td>
Richard Smith24fd6c82012-05-23 01:38:11 +0000284 <td class="full" align="center">Clang 3.1</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000285 </tr>
286 <tr>
287 <td>Inline namespaces</td>
288 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2535.htm">N2535</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000289 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000290 </tr>
291 <tr>
292 <td>Unrestricted unions</td>
293 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2544.pdf">N2544</a></td>
Richard Smith24fd6c82012-05-23 01:38:11 +0000294 <td class="full" align="center">Clang 3.1</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000295 </tr>
296 <tr>
297 <td>Local and unnamed types as template arguments</td>
298 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm">N2657</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000299 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000300 </tr>
301 <tr>
302 <td>Range-based for</td>
303 <td><a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2930.html">N2930</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000304 <td class="full" align="center">Clang 3.0</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000305 </tr>
306 <tr>
307 <td>Explicit virtual overrides</td>
308 <td><a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2928.htm">N2928</a>
Richard Smitha5ec58d2012-02-24 18:37:14 +0000309 <br><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3206.htm">N3206</a>
310 <br><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3272.htm">N3272</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000311 <td class="full" align="center">Clang 3.0</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000312 </tr>
313 <tr>
314 <td>Minimal support for garbage collection and reachability-based leak detection</td>
315 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2670.htm">N2670</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700316 <td class="na" align="center">N/A <a href="#n2670">(2)</a></td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000317 </tr>
318 <tr>
319 <td>Allowing move constructors to throw [noexcept]</td>
David Blaikieb09a33c2011-11-02 15:13:40 +0000320 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3050.html">N3050</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000321 <td class="full" align="center">Clang 3.0</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000322 </tr>
323 <tr>
324 <td>Defining move special member functions</td>
David Blaikieb09a33c2011-11-02 15:13:40 +0000325 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3053.html">N3053</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000326 <td class="full" align="center">Clang 3.0</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000327 </tr>
Cedric Venet3d658642009-02-14 20:20:19 +0000328
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000329 <tr class="separator">
Benjamin Kramer8398bdb2011-11-05 10:11:36 +0000330 <th align="center" colspan="3">Concurrency</th>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000331 </tr>
332 <tr>
333 <td>Sequence points</td>
334 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2239.html">N2239</a></td>
Richard Smith02344ac2013-06-17 23:54:23 +0000335 <td class="full" align="center">Clang 3.3</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000336 </tr>
337 <tr>
338 <td>Atomic operations</td>
339 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2427.html">N2427</a></td>
Richard Smith24fd6c82012-05-23 01:38:11 +0000340 <td class="full" align="center">Clang 3.1</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000341 </tr>
342 <tr>
343 <td>Strong Compare and Exchange</td>
344 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2748.html">N2748</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700345 <td class="full" align="center">Clang 3.1 <a href="#n2748">(3)</a></td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000346 </tr>
347 <tr>
348 <td>Bidirectional Fences</td>
349 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2752.htm">N2752</a></td>
Richard Smith24fd6c82012-05-23 01:38:11 +0000350 <td class="full" align="center">Clang 3.1</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000351 </tr>
Douglas Gregor08765a92010-12-21 05:43:31 +0000352
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000353 <tr>
354 <td>Memory model</td>
355 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2429.htm">N2429</a></td>
Richard Smith52a92502013-01-29 04:55:18 +0000356 <td class="full" align="center">Clang 3.2</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000357 </tr>
358 <tr>
359 <td>Data-dependency ordering: atomics and memory model</td>
360 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2664.htm">N2664</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700361 <td class="full" align="center">Clang 3.2 <a href="#n2664">(4)</a></td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000362 </tr>
363 <tr>
364 <td>Propagating exceptions</td>
365 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2179.html">N2179</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000366 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000367 </tr>
368 <tr>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000369 <td>Allow atomics use in signal handlers</td>
370 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2547.htm">N2547</a></td>
Richard Smith24fd6c82012-05-23 01:38:11 +0000371 <td class="full" align="center">Clang 3.1</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000372 </tr>
373 <tr>
374 <td>Thread-local storage</td>
375 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2659.htm">N2659</a></td>
Richard Smith02344ac2013-06-17 23:54:23 +0000376 <td class="full" align="center">Clang 3.3</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000377 </tr>
378 <tr>
379 <td>Dynamic initialization and destruction with concurrency</td>
380 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2660.htm">N2660</a></td>
Richard Smith14416322013-02-22 09:31:00 +0000381 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000382 </tr>
Cedric Venet3d658642009-02-14 20:20:19 +0000383
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000384 <tr class="separator">
Richard Smith1e409d82012-02-24 18:42:08 +0000385 <th align="center" colspan="3">C99 Features in C++11</th>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000386 </tr>
387 <tr>
388 <td><code>__func__</code> predefined identifier</td>
389 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2340.htm">N2340</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000390 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000391 </tr>
392 <tr>
393 <td>C99 preprocessor</td>
394 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1653.htm">N1653</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000395 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000396 </tr>
397 <tr>
398 <td><code>long long</code></td>
399 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1811.pdf">N1811</a></td>
Michael J. Spencer45b636a2011-11-02 06:29:37 +0000400 <td class="full" align="center">Clang 2.9</td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000401 </tr>
402 <tr>
403 <td>Extended integral types</td>
404 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1988.pdf">N1988</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700405 <td class="na" align="center">N/A <a href="#n1988">(5)</a></td>
Douglas Gregor43ac6d02011-10-14 23:21:49 +0000406 </tr>
Cedric Venet3d658642009-02-14 20:20:19 +0000407</table>
Richard Smith896e42d2013-03-12 19:56:09 +0000408
409<p>
410<span id="n2761">(1): The <code>[[carries_dependency]]</code> attribute
Richard Smithf72663f2013-03-18 21:57:52 +0000411has no effect.</span><br>
Stephen Hines651f13c2014-04-23 16:59:28 -0700412<span id="n2670">(2): No compiler changes are required for an implementation
413such as Clang that does not provide garbage collection.</span><br>
414<span id="n2748">(3): All compare-exchange operations are emitted as
Richard Smithf72663f2013-03-18 21:57:52 +0000415strong compare-exchanges.</span><br>
Stephen Hines651f13c2014-04-23 16:59:28 -0700416<span id="n2664">(4): <code>memory_order_consume</code> is lowered to
Richard Smithf72663f2013-03-18 21:57:52 +0000417<code>memory_order_acquire</code>.</span><br>
Stephen Hines651f13c2014-04-23 16:59:28 -0700418<span id="n1988">(5): No compiler changes are required for an implementation
419such as Clang that does not provide any extended integer types.
420<code>__int128</code> is not treated as an extended integer type,
421because changing <code>intmax_t</code> would be an ABI-incompatible
422change.</span>
Richard Smith896e42d2013-03-12 19:56:09 +0000423</p>
424
Richard Smithaff7d352013-04-19 17:27:48 +0000425<h2 id="cxx14">C++1y implementation status</h2>
426
Stephen Hinesef822542014-07-21 00:47:37 -0700427<p>Clang 3.4 and later implement all of the Draft International Standard (see <a
428href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3797.pdf">most
429recent publicly available draft</a>)
Richard Smith7dae9292013-11-07 06:41:26 +0000430of the upcoming C++ language standard, provisionally named C++1y. The following
431table describes the Clang version in which each feature became available.</p>
Richard Smithaff7d352013-04-19 17:27:48 +0000432
Richard Smith3139d662013-05-07 02:55:48 +0000433<p>You can use Clang in C++1y mode with the <code>-std=c++1y</code> option.</p>
Richard Smith7dc88642013-04-20 13:22:50 +0000434
Richard Smithaff7d352013-04-19 17:27:48 +0000435<table width="689" border="1" cellspacing="0">
436 <tr>
437 <th>Language Feature</th>
438 <th>C++1y Proposal</th>
439 <th>Available in Clang?</th>
440 </tr>
441 <tr>
442 <td>Tweak to certain C++ contextual conversions</td>
443 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3323.pdf">N3323</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700444 <td class="full" align="center">Clang 3.4</td>
Richard Smithaff7d352013-04-19 17:27:48 +0000445 </tr>
446 <tr>
Richard Smith408de432013-04-20 12:44:32 +0000447 <td>Binary literals</td>
Richard Smithaff7d352013-04-19 17:27:48 +0000448 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3472.pdf">N3472</a></td>
Richard Smith2fcf0de2013-04-19 20:47:20 +0000449 <td class="full" align="center">Yes</td>
Richard Smithaff7d352013-04-19 17:27:48 +0000450 </tr>
451 <tr>
Richard Smitha2c36462013-04-26 16:15:35 +0000452 <td>decltype(auto)</td>
Richard Smith6f616292013-05-09 18:53:17 +0000453 <td rowspan=2 style="vertical-align:middle"><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3638.html">N3638</a></td>
Richard Smith02344ac2013-06-17 23:54:23 +0000454 <td class="full" align="center">Clang 3.3</td>
Richard Smitha2c36462013-04-26 16:15:35 +0000455 </tr>
456 <tr>
Richard Smith96ba7c72013-04-20 12:47:36 +0000457 <td>Return type deduction for normal functions</td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700458 <td class="full" align="center">Clang 3.4</td>
Richard Smith96ba7c72013-04-20 12:47:36 +0000459 </tr>
Richard Smith408de432013-04-20 12:44:32 +0000460 <tr>
Richard Smith96ba7c72013-04-20 12:47:36 +0000461 <td>Initialized lambda captures</td>
Richard Smith6f616292013-05-09 18:53:17 +0000462 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3648.html">N3648</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700463 <td class="full" align="center">Clang 3.4</td>
Richard Smithaff7d352013-04-19 17:27:48 +0000464 </tr>
465 <tr>
Richard Smithbb2d3782013-04-20 12:58:57 +0000466 <td>Generic lambdas</td>
Richard Smith6f616292013-05-09 18:53:17 +0000467 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3649.html">N3649</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700468 <td class="full" align="center">Clang 3.4</td>
Richard Smithaff7d352013-04-19 17:27:48 +0000469 </tr>
470 <tr>
Richard Smithbb2d3782013-04-20 12:58:57 +0000471 <td>Variable templates</td>
Richard Smith6f616292013-05-09 18:53:17 +0000472 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3651.pdf">N3651</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700473 <td class="full" align="center">Clang 3.4</td>
Richard Smithaff7d352013-04-19 17:27:48 +0000474 </tr>
475 <tr>
Richard Smith05a73f62013-04-20 12:49:36 +0000476 <td>Relaxing requirements on constexpr functions</td>
Richard Smith6f616292013-05-09 18:53:17 +0000477 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3652.html">N3652</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700478 <td class="full" align="center">Clang 3.4</td>
Richard Smithaff7d352013-04-19 17:27:48 +0000479 </tr>
480 <tr>
Richard Smith96ba7c72013-04-20 12:47:36 +0000481 <td>Member initializers and aggregates</td>
Richard Smith6f616292013-05-09 18:53:17 +0000482 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3653.html">N3653</a></td>
Richard Smith02344ac2013-06-17 23:54:23 +0000483 <td class="full" align="center">Clang 3.3</td>
Richard Smithaff7d352013-04-19 17:27:48 +0000484 </tr>
Richard Smithaff7d352013-04-19 17:27:48 +0000485 <tr>
Richard Smith8e95e302013-04-20 12:57:49 +0000486 <td>Clarifying memory allocation</td>
Richard Smith6f616292013-05-09 18:53:17 +0000487 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3664.html">N3664</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700488 <td class="full" align="center">Clang 3.4</td>
Richard Smithaff7d352013-04-19 17:27:48 +0000489 </tr>
Richard Smithf9d2ccd2013-09-27 19:11:33 +0000490 <tr>
491 <td><tt>[[deprecated]]</tt> attribute</td>
492 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3760.html">N3760</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700493 <td class="full" align="center">Clang 3.4</td>
Richard Smithf9d2ccd2013-09-27 19:11:33 +0000494 </tr>
495 <tr>
496 <td>Single quotation mark as digit separator</td>
Richard Smith88407bb2013-11-05 08:27:00 +0000497 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3781.pdf">N3781</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700498 <td class="full" align="center">Clang 3.4</td>
Richard Smithf9d2ccd2013-09-27 19:11:33 +0000499 </tr>
500 <tr>
Benjamin Kramereb263e82013-09-27 19:35:09 +0000501 <td>C++ Sized Deallocation</td>
Richard Smith88407bb2013-11-05 08:27:00 +0000502 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3778.html">N3778</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700503 <td class="full" align="center">Clang 3.4</td>
Richard Smithf9d2ccd2013-09-27 19:11:33 +0000504 </tr>
Richard Smithaff7d352013-04-19 17:27:48 +0000505</table>
506
Richard Smith7dae9292013-11-07 06:41:26 +0000507<h2 id="cxx17">C++1z implementation status</h2>
508
Stephen Hinesef822542014-07-21 00:47:37 -0700509<p>Clang has <b>highly experimental</b> support for some proposed features of
510the C++ standard following C++1y,
Richard Smith7dae9292013-11-07 06:41:26 +0000511provisionally named C++1z. The following table describes which C++1z features
512have been implemented in Clang and in which Clang version they became
513available.</p>
514
Stephen Hinesef822542014-07-21 00:47:37 -0700515<p>Note that support for these features may change or be removed without notice,
516as the draft C++1z standard evolves.</p>
517
Richard Smith7dae9292013-11-07 06:41:26 +0000518<p>You can use Clang in C++1z mode with the <code>-std=c++1z</code> option.</p>
Stephen Hinesef822542014-07-21 00:47:37 -0700519
520<table width="689" border="1" cellspacing="0">
521 <tr>
522 <th>Language Feature</th>
523 <th>C++1z Proposal</th>
524 <th>Available in Clang?</th>
525 </tr>
526 <tr>
527 <td><tt>static_assert</tt> with no message</td>
528 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3928.pdf">N3928</a></td>
529 <td class="svn" align="center">SVN</td>
530 </tr>
531 <tr>
532 <td>Disabling trigraph expansion by default</td>
533 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3981.html">N3981</a></td>
534 <td class="svn" align="center">SVN</td>
535 </tr>
536 <tr>
537 <td>Terse range-based for loops</td>
538 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3994.htm">N3994</a></td>
539 <td class="svn" align="center">SVN</td>
540 </tr>
541 <tr>
542 <td><tt>typename</tt> in a template template parameter</td>
543 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4051.html">N4051</a></td>
544 <td class="svn" align="center">SVN</td>
545 </tr>
546</table>
Richard Smith7dae9292013-11-07 06:41:26 +0000547
Bill Wendlingc78e5b32013-11-28 00:33:42 +0000548<h2 id="ts">Technical specifications and standing documents</h2>
549
550<p>ISO C++ also publishes a number of documents describing additional language
551and library features that are not part of standard C++. The following table
552describes which language features have been implemented in Clang and in which
553Clang version they became available:</p>
554
555<table width="689" border="1" cellspacing="0">
556 <tr>
557 <th>Document</th>
558 <th>Latest draft</th>
559 <th>Available in Clang?</th>
560 </tr>
561 <tr>
562 <td>SD-6: SG10 feature test recommendations</td>
563 <td><a href="http://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations">SD-6</a></td>
Stephen Hines651f13c2014-04-23 16:59:28 -0700564 <td class="full" align="center">Clang 3.4 (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3745">N3745</a>)</td>
Bill Wendlingc78e5b32013-11-28 00:33:42 +0000565 </tr>
566 <tr>
567 <td>[DRAFT TS] Array extensions (arrays of runtime bound)</td>
568 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3820.html">N3820</a></td>
569 <td class="none" align="center">No</td>
570 </tr>
Stephen Hines651f13c2014-04-23 16:59:28 -0700571 <tr>
572 <td>[DRAFT TS] Library fundamentals (invocation type traits)</td>
573 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3908.html">N3908</a></td>
574 <td class="none" align="center">No</td>
575 </tr>
576 <tr>
577 <td>[DRAFT TS] Concepts</td>
578 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3929.pdf">N3929</a></td>
579 <td class="none" align="center">No</td>
580 </tr>
Bill Wendlingc78e5b32013-11-28 00:33:42 +0000581</table>
582
Cedric Venet3d658642009-02-14 20:20:19 +0000583</div>
584</body>
585</html>