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David Blaikiee35b3aa2011-10-14 07:58:10[diff] [blame]6 <title>Clang - C++ and C++'11 Status</title>
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David Blaikiee35b3aa2011-10-14 07:58:10[diff] [blame]26<h1>C++ and C++'11 Support in Clang</h1>
Cedric Venet084381332009-02-14 20:20:19[diff] [blame]27<!--*************************************************************************-->
Douglas Gregor0799d912009-06-27 19:33:58[diff] [blame]28<p>Last updated: $Date$</p>
Cedric Venet084381332009-02-14 20:20:19[diff] [blame]29
Douglas Gregor17aa45d2011-07-21 17:46:15[diff] [blame]30<p>Clang currently implements all of the ISO C++ 1998 standard
31 (including the defects addressed in the ISO C++ 2003 standard)
David Blaikiee35b3aa2011-10-14 07:58:10[diff] [blame]32 except for 'export' (which has been removed in C++'11)
Douglas Gregor17aa45d2011-07-21 17:46:15[diff] [blame]33 and is considered a production-quality C++ compiler. The <a
34 href="http://llvm.org/bugs/">LLVM bug tracker</a> contains a Clang
35 C++ component that tracks known Clang C++ bugs.</p>
Douglas Gregorbb26a922010-02-05 23:51:14[diff] [blame]36
David Blaikiee35b3aa2011-10-14 07:58:10[diff] [blame]37<h2 id="cxx11">C++11 Implementation status</h2>
Chris Lattner6fe37482010-05-21 20:59:40[diff] [blame]38
Douglas Gregor3d711632011-10-14 23:35:48[diff] [blame]39 <p>Clang provides support for a number of features included in the new <a href="http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=50372">ISO C++ Standard, ISO/IEC 14882:2011</a>. The following table describes which C++11 features have been implemented in Clang and in which Clang versions they became available.</p>
Chris Lattner6fe37482010-05-21 20:59:40[diff] [blame]40
David Blaikiee35b3aa2011-10-14 07:58:10[diff] [blame]41<p>You can use Clang in C++11 mode either
Jeffrey Yasskincb407572011-03-29 22:27:50[diff] [blame]42with <a href="http://libcxx.llvm.org/">libc++</a> or with gcc's libstdc++.
43libstdc++-4.4 requires <a href="libstdc++4.4-clang0x.patch">a patch</a> to work
44with clang; other versions have not been tested.</p>
45
Cedric Venet084381332009-02-14 20:20:19[diff] [blame]46<table width="689" border="1" cellspacing="0">
Douglas Gregor1f64b592011-10-14 23:21:49[diff] [blame]47 <tr>
48 <th bgcolor="#ffddaa">Language Feature</th>
49 <th bgcolor="#ffddaa">C++0x Proposal</th>
50 <th bgcolor="#ffddaa">Available in Clang?</th>
51 </tr>
52 <tr>
53 <td>Rvalue references</td>
54 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2118.html">N2118</a></td>
55 <td align="center">Clang 2.9</td>
56 </tr>
57 <tr>
58 <td>&nbsp;&nbsp;&nbsp;&nbsp;Rvalue references for <code>*this</code></td>
59 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2439.htm">N2439</a></td>
60 <td align="center">Clang 2.9<br/></td>
61 </tr>
62 <tr>
63 <td>Initialization of class objects by rvalues</td>
64 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1610.html">N1610</a></td>
65 <td align="center">Clang 2.9</td>
66 </tr>
67 <tr>
68 <td>Non-static data member initializers</td>
69 <td><a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2008/n2756.htm">N2756</a></td>
70 <td align="center">Clang 3.0</a></td>
71 </tr>
72 <tr>
73 <td>Variadic templates</td>
74 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2242.pdf">N2242</a></td>
75 <td align="center">Clang 2.9</td>
76 </tr>
77 <tr>
78 <td>&nbsp;&nbsp;&nbsp;&nbsp;Extending variadic template template parameters</td>
79 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2555.pdf">N2555</a></td>
80 <td align="center">Clang 2.9</td>
81 </tr>
82 <tr>
83 <td>Initializer lists</td>
84 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2672.htm">N2672</a></td>
85 <td align="center">No</td>
86 </tr>
87 <tr>
88 <td>Static assertions</td>
89 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1720.html">N1720</a></td>
90 <td align="center">Clang 2.9</td>
91 </tr>
92 <tr>
93 <td><code>auto</code>-typed variables</td>
94 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1984.pdf">N1984</a></td>
95 <td align="center">Clang 2.9</td>
96 </tr>
97 <tr>
98 <td>&nbsp;&nbsp;&nbsp;&nbsp;Multi-declarator <code>auto</code></td>
99 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1737.pdf">N1737</a></td>
100 <td align="center">Clang 2.9</td>
101 </tr>
102 <tr>
103 <td>&nbsp;&nbsp;&nbsp;&nbsp;Removal of auto as a storage-class specifier</td>
104 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2546.htm">N2546</a></td>
105 <td align="center">Clang 2.9</td>
106 </tr>
107 <tr>
108 <td>&nbsp;&nbsp;&nbsp;&nbsp;New function declarator syntax</td>
109 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2541.htm">N2541</a></td>
110 <td align="center">Clang 2.9</td>
111 </tr>
112 <tr>
113 <td>New wording for C++0x lambdas</td>
114 <td><a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2927.pdf">N2927</a></td>
115 <td align="center">No</td>
116 </tr>
117 <tr>
118 <td>Declared type of an expression</td>
119 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2343.pdf">N2343</a></td>
120 <td align="center">Clang 2.9</td>
121 </tr>
122 <tr>
123 <td>Right angle brackets</td>
124 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1757.html">N1757</a></td>
125 <td align="center">Clang 2.9</td>
126 </tr>
127 <tr>
128 <td>Default template arguments for function templates</td>
129 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#226">DR226</a></td>
130 <td align="center">Clang 2.9</td>
131 </tr>
132 <tr>
133 <td>Solving the SFINAE problem for expressions</td>
134 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2634.html">DR339</a></td>
135 <td align="center">Clang 2.9</td>
136 </tr>
137 <tr>
138 <td>Alias templates</td>
139 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2258.pdf">N2258</a></td>
140 <td align="center">Clang 3.0</td>
141 </tr>
142 <tr>
143 <td>Extern templates</td>
144 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1987.htm">N1987</a></td>
145 <td align="center">Clang 2.9</td>
146 </tr>
147 <tr>
148 <td>Null pointer constant</td>
149 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2431.pdf">N2431</a></td>
150 <td align="center">Clang 3.0</td>
151 </tr>
152 <tr>
153 <td>Strongly-typed enums</td>
154 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2347.pdf">N2347</a></td>
155 <td align="center">Clang 2.9</td>
156 </tr>
157 <tr>
158 <td>Forward declarations for enums</td>
159 <td>
160 <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2764.pdf">N2764
161 </a></td>
162 <td align="center">No</td>
163 </tr>
164 <tr>
165 <td>Generalized attributes</td>
166 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2761.pdf">N2761</a></td>
167 <td align="center">No</td>
168 </tr>
169 <tr>
170 <td>Generalized constant expressions</td>
171 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2235.pdf">N2235</a></td>
172 <td align="center">No</td>
173 </tr>
174 <tr>
175 <td>Alignment support</td>
176 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2341.pdf">N2341</a></td>
177 <td align="center">Clang 3.0</td>
178 </tr>
179 <!-- Skipped N1627: Conditionally-support behavior -->
180 <!-- Skipped N1727: Changing Undefined Behavior into Diagnosable Errors -->
181 <tr>
182 <td>Delegating constructors</td>
183 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1986.pdf">N1986</a></td>
184 <td align="center">Clang 3.0<br/></td>
185 </tr>
186 <tr>
187 <td>Inheriting constructors</td>
188 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2540.htm">N2540</a></td>
189 <td align="center">No</td>
190 </tr>
191 <tr>
192 <td>Explicit conversion operators</td>
193 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2437.pdf">N2437</a></td>
194 <td align="center">Clang 3.0</td>
195 </tr>
196 <tr>
197 <td>New character types</td>
198 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2249.html">N2249</a></td>
199 <td align="center">Clang 2.9</td>
200 </tr>
201 <tr>
202 <td>Unicode string literals</td>
203 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2442.htm">N2442</a></td>
204 <td align="center">Clang 3.0</td>
205 </tr>
206 <tr>
207 <td>Raw string literals</td>
208 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2442.htm">N2442</a></td>
209 <td align="center">Clang 3.0</td>
210 </tr>
211 <tr>
212 <td>Universal character name literals</td>
213 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2170.html">N2170</a></td>
214 <td align="center">No</td>
215 </tr>
216 <tr>
217 <td>User-defined literals</td>
218 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2765.pdf">N2765</a></td>
219 <td align="center">No</td>
220 </tr>
221 <tr>
222 <td>Standard Layout Types</td>
223 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2342.htm">N2342</a></td>
224 <td align="center">Clang 3.0</td>
225 </tr>
226 <tr>
Douglas Gregor7ff1e7e2011-10-28 19:44:09[diff] [blame^]227 <td>Defaulted functions</td>
228 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2346.htm">N2346</a></td>
229 <td align="center">Clang 3.0</td>
230 </tr>
231 <tr>
232 <td>Deleted functions</td>
Douglas Gregor1f64b592011-10-14 23:21:49[diff] [blame]233 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2346.htm">N2346</a></td>
234 <td align="center">Clang 2.9</td>
235 </tr>
236 <tr>
237 <td>Extended friend declarations</td>
238 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1791.pdf">N1791</a></td>
239 <td align="center">Clang 2.9</td>
240 </tr>
241 <tr>
242 <td>Extending <code>sizeof</code></td>
243 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2253.html">N2253</a></td>
244 <td align="center">No</td>
245 </tr>
246 <tr>
247 <td>Inline namespaces</td>
248 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2535.htm">N2535</a></td>
249 <td align="center">Clang 2.9</td>
250 </tr>
251 <tr>
252 <td>Unrestricted unions</td>
253 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2544.pdf">N2544</a></td>
254 <td align="center">No</td>
255 </tr>
256 <tr>
257 <td>Local and unnamed types as template arguments</td>
258 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm">N2657</a></td>
259 <td align="center">Clang 2.9</td>
260 </tr>
261 <tr>
262 <td>Range-based for</td>
263 <td><a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2930.html">N2930</a></td>
264 <td align="center">Clang 3.0</td>
265 </tr>
266 <tr>
267 <td>Explicit virtual overrides</td>
268 <td><a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2928.htm">N2928</a>
269 <br/><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3206.htm">N3206</a>
270<br/><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3272.htm">N3272</a></td>
271 <td align="center">Clang 3.0</td>
272 </tr>
273 <tr>
274 <td>Minimal support for garbage collection and reachability-based leak detection</td>
275 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2670.htm">N2670</a></td>
276 <td align="center">No</td>
277 </tr>
278 <tr>
279 <td>Allowing move constructors to throw [noexcept]</td>
280 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3050.htm">N3050</a></td>
281 <td align="center">Clang 3.0</td>
282 </tr>
283 <tr>
284 <td>Defining move special member functions</td>
285 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3053.htm">N3053</a></td>
286 <td align="center">Clang 3.0</td>
287 </tr>
Cedric Venet084381332009-02-14 20:20:19[diff] [blame]288
Douglas Gregor1f64b592011-10-14 23:21:49[diff] [blame]289 <tr class="separator">
290 <th align="center" colspan="3" bgcolor="#ffddaa">Concurrency</th>
291 </tr>
292 <tr>
293 <td>Sequence points</td>
294 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2239.html">N2239</a></td>
295 <td align="center">No</td>
296 </tr>
297 <tr>
298 <td>Atomic operations</td>
299 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2427.html">N2427</a></td>
300 <td align="center">No</td>
301 </tr>
302 <tr>
303 <td>Strong Compare and Exchange</td>
304 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2748.html">N2748</a></td>
305 <td align="center">No</td>
306 </tr>
307 <tr>
308 <td>Bidirectional Fences</td>
309 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2752.htm">N2752</a></td>
310 <td align="center">No</td>
311 </tr>
Douglas Gregor6b6e0822010-12-21 05:43:31[diff] [blame]312
Douglas Gregor1f64b592011-10-14 23:21:49[diff] [blame]313 <tr>
314 <td>Memory model</td>
315 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2429.htm">N2429</a></td>
316 <td align="center">No</td>
317 </tr>
318 <tr>
319 <td>Data-dependency ordering: atomics and memory model</td>
320 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2664.htm">N2664</a></td>
321 <td align="center">No</td>
322 </tr>
323 <tr>
324 <td>Propagating exceptions</td>
325 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2179.html">N2179</a></td>
326 <td align="center">Clang 2.9</td>
327 </tr>
328 <tr>
329 <td>Abandoning a process and at_quick_exit</td>
330 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2440.htm">N2440</a></td>
331 <td align="center">No</td>
332 </tr>
333 <tr>
334 <td>Allow atomics use in signal handlers</td>
335 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2547.htm">N2547</a></td>
336 <td align="center"><span class="unsupported">No</span></td>
337 </tr>
338 <tr>
339 <td>Thread-local storage</td>
340 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2659.htm">N2659</a></td>
341 <td align="center">No</td>
342 </tr>
343 <tr>
344 <td>Dynamic initialization and destruction with concurrency</td>
345 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2660.htm">N2660</a></td>
346 <td align="center">No</td>
347 </tr>
Cedric Venet084381332009-02-14 20:20:19[diff] [blame]348
Douglas Gregor1f64b592011-10-14 23:21:49[diff] [blame]349 <tr class="separator">
350 <th align="center" colspan="3" bgcolor="#ffddaa">C99 Features in C++0x</th>
351 </tr>
352 <tr>
353 <td><code>__func__</code> predefined identifier</td>
354 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2340.htm">N2340</a></td>
355 <td align="center">Clang 2.9</td>
356 </tr>
357 <tr>
358 <td>C99 preprocessor</td>
359 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1653.htm">N1653</a></td>
360 <td align="center">Clang 2.9</td>
361 </tr>
362 <tr>
363 <td><code>long long</code></td>
364 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1811.pdf">N1811</a></td>
365 <td align="center">Clang 2.9</td>
366 </tr>
367 <tr>
368 <td>Extended integral types</td>
369 <td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1988.pdf">N1988</a></td>
370 <td align="center">No</td>
371 </tr>
Cedric Venet084381332009-02-14 20:20:19[diff] [blame]372</table>
Douglas Gregor9e0d21a2009-05-12 18:36:58[diff] [blame]373<br />
Cedric Venet084381332009-02-14 20:20:19[diff] [blame]374</div>
375</body>
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