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Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]6 <title>Clang - C++ and C++'0x Status</title>
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Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]25<h1>C++ and C++'0x Support in Clang</h1>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]26<!--*************************************************************************-->
Douglas Gregor0799d912009-06-27 19:33:58 +0000[diff] [blame]27<p>Last updated: $Date$</p>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]28
Douglas Gregorbb26a922010-02-05 23:51:14 +0000[diff] [blame]29 <ul>
30 <li><a href="#projects">Projects Building with Clang</a></li>
31 <li><a href="#specification">Implementation Status by Section</a></li>
32 <li><a href="#cxx0x">C++0x Status</a></li>
33 </ul>
34
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]35<p>Clang currently implements all of the ISO C++ 1998 standard (including
36 the defects addressed in the ISO C++ 2003 standard) except for 'export'.
37 However, the implementation of Clang C++ is still somewhat immature, with
38 remaining bugs that may cause compiler crashes, erroneous errors and warnings,
39 or miscompiled code. The <a href="http://llvm.org/bugs/">LLVM bug tracker</a>
40 contains a Clang C++ component that tracks known Clang C++ bugs.</p>
Douglas Gregorbb26a922010-02-05 23:51:14 +0000[diff] [blame]41
Douglas Gregor61c1ac22010-04-12 16:01:38 +0000[diff] [blame]42 <h2 id="projects">Projects Building with Clang</h2>
Douglas Gregorbb26a922010-02-05 23:51:14 +0000[diff] [blame]43
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]44 <p>Clang is now capable of compiling large C++ projects, and the following
45 table describes various projects that we have attempted to compile with
46 Clang++.</p>
Douglas Gregorbb26a922010-02-05 23:51:14 +0000[diff] [blame]47
48<table width="689" border="1" cellspacing="0">
49 <tr>
50 <th>Project</th>
51 <th>Status</th>
52 <th>Last Tested</th>
53 <th>Tracking Bug</th>
54 </tr>
55 <tr>
56 <td><a href="http://clang.llvm.org">Clang</a> and <a href="http://llvm.org">LLVM</a></td>
57 <td>Successful self-hosting achieved</td>
58 <td>Continually</td>
59 <td></td>
60 </tr>
61 <tr>
Douglas Gregorfa186e92010-02-09 16:36:17 +0000[diff] [blame]62 <td><a href="http://www.cmake.org">CMake</a></td>
63 <td>Compiles, passes regression tests (debug build)</td>
64 <td>February 9, 2010</td>
65 <td></td>
66 </tr>
67 <tr>
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]68 <td><a href="http://www.boost.org">Boost</a></td>
69 <td><a href="http://blog.llvm.org/2010/05/clang-builds-boost.html">Compiles
70 and passes regression tests</a> on Darwin/X86-64.</td>
71 <td>May 20, 2010</td>
72 <td><a href="http://llvm.org/bugs/show_bug.cgi?id=6023">PR6023</a></td>
73 </tr>
74 <tr>
Anton Korobeynikovc5c905e2010-02-09 16:50:54 +0000[diff] [blame]75 <td><a href="http://qt.nokia.com">Qt</a></td>
Anton Korobeynikov55496d72010-02-09 16:46:25 +0000[diff] [blame]76 <td>Partially compiles; miscompilation of uic prevents complete compilation, qmake works, some small examples also.</td>
Douglas Gregorfa186e92010-02-09 16:36:17 +0000[diff] [blame]77 <td>February 9, 2010</td>
78 <td><a href="http://llvm.org/bugs/show_bug.cgi?id=5881">PR5881</a></td>
79 </tr>
Douglas Gregorbb26a922010-02-05 23:51:14 +0000[diff] [blame]80</table>
81
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]82<h2 id="cxx0x">C++0x Implementation status</h2>
83
84<p>Clang's development effort is focused primarily on fixing bugs in the current
85ISO C++ standard (1998/2003). This section tracks the status of various C++0x
86features. In general, the implementations of these features are far less
87developed than C++98/03 features.</p>
88
89
90<h2 id="specification">Implementation Status by Feature</h2>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]91
92
93<!-- Within this table: The colors we're using to color-code our level
94of support for a given section:
95
96 White (no background): not considered/tested.
97 #C11B17: Broken.
98 #F88017: Some useful examples work
99 #FDD017: Many examples work
100 #347C17: Nearly everything works
101 #00FF00 + check mark: Implementation complete!
102 -->
103
104<p>The following table is used to help track our implementation
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]105 progress toward implementing the complete C++'0x standard. We use a
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]106 simple, somewhat arbitrary color-coding scheme to describe the
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]107 relative completeness of features:</p>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]108
109<table width="689" border="1" cellspacing="0">
110 <tr>
111 <th>Not started/not evaluated</th>
112 <th>Not Applicable</th>
113 <th>Broken</th>
114 <th>Some examples work</th>
115 <th>Many examples work</th>
116 <th>Nearly everything works</th>
Douglas Gregor5a4d12a2009-05-12 17:55:28 +0000[diff] [blame]117 <th>Complete</th>
118 <th>Complete (with tests for each paragraph)</th>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]119 </tr>
120 <tr>
121 <td></td>
122 <td class="na">N/A</td>
123 <td class="broken"></td>
124 <td class="basic"></td>
125 <td class="medium"></td>
126 <td class="advanced"></td>
Douglas Gregor5a4d12a2009-05-12 17:55:28 +0000[diff] [blame]127 <td class="complete"></td>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]128 <td class="complete" align="center">&#x2713;</td>
129 </tr>
130</table>
131
132<p>A feature is "complete" when the appropriate Clang component (Parse, AST,
133Sema, CodeGen) implements the behavior described in all of the
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]134paragraphs in the relevant C++'0x draft standard. The major
135components are:</p>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]136
137<dl>
138 <dt>Parse</dt>
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]139 <dd>Clang is able to parse the grammar of this feature (or the grammar
140 described by this section), but does not necessarily do anything with the
141 parsed result. Use Clang's <code>-fsyntax-only</code> option to parse C++
142 programs.</dd>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]143
144 <dt>AST</dt>
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]145 <dd>Clang builds an abstract syntax tree (AST) for the feature, but does not
146 necessarily perform any type-checking. Use Clang's <code>-ast-print</code>
147 option to print the resulting ASTs.</dd>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]148
149 <dt>Sema</dt>
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]150 <dd>Clang parses and type-checks this feature and provides a well-formed AST
151 annotated with types. Use Clang's <code>-fsyntax-only</code> to type-check
152 code.</dd>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]153
154 <dt>CodeGen</dt>
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]155 <dd>Clang parses, type-checks, and generates code for this feature, allowing
156 one to compile and execute programs.</dd>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]157</dl>
158
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]159<p>Updates to this table are welcome! Tests for the various features are also
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]160welcome!</p>
161
162<table width="689" border="1" cellspacing="0">
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]163<tr><td colspan="6" align="center" bgcolor="#ffffcc">C++0x Features</td>
164</tr>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]165 <tr>
Chris Lattner6fe37482010-05-21 20:59:40 +0000[diff] [blame^]166 <th>Feature</th>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]167 <th>Parse</th>
168 <th>AST</th>
169 <th>Sema</th>
170 <th>CodeGen</th>
171 <th>Notes</th>
172 </tr>
Douglas Gregor1bbffbc2009-05-07 17:50:16 +0000[diff] [blame]173
Sebastian Redl576fd422009-05-10 18:38:11 +0000[diff] [blame]174<tr>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]175 <td>Explicit conversion operators (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2437.pdf">N2437</a>)</td>
Douglas Gregor5a4d12a2009-05-12 17:55:28 +0000[diff] [blame]176 <td class="complete" align="center"></td>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]177 <td class="medium" align="center"></td>
178 <td class="advanced" align="center"></td>
179 <td class="broken"></td>
180 <td>No name mangling; ASTs don't contain calls to conversion operators</td>
Sebastian Redl576fd422009-05-10 18:38:11 +0000[diff] [blame]181</tr>
182<tr>
Anders Carlssonbd1a1d22009-03-16 17:28:26 +0000[diff] [blame]183 <td>Static assertions (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1720.pdf">N1720</a>)</td>
Douglas Gregor5a4d12a2009-05-12 17:55:28 +0000[diff] [blame]184 <td class="complete" align="center"></td>
185 <td class="complete" align="center"></td>
186 <td class="complete" align="center"></td>
Anders Carlssonbd1a1d22009-03-16 17:28:26 +0000[diff] [blame]187 <td class="na">N/A</td>
188 <td></td>
Sebastian Redl576fd422009-05-10 18:38:11 +0000[diff] [blame]189</tr>
190<tr>
Sebastian Redld1309a32009-04-12 17:41:24 +0000[diff] [blame]191 <td>Deleted functions (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2346.htm">N2346</a>)</td>
Douglas Gregor5a4d12a2009-05-12 17:55:28 +0000[diff] [blame]192 <td class="complete" align="center"></td>
193 <td class="complete" align="center"></td>
194 <td class="complete" align="center"></td>
Sebastian Redld1309a32009-04-12 17:41:24 +0000[diff] [blame]195 <td class="na">N/A</td>
196 <td></td>
Sebastian Redl576fd422009-05-10 18:38:11 +0000[diff] [blame]197</tr>
198<tr>
Sebastian Redld1309a32009-04-12 17:41:24 +0000[diff] [blame]199 <td>Rvalue references (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2118.html">N2118</a> + <a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2831.html">N2831</a>)</td>
Douglas Gregor5a4d12a2009-05-12 17:55:28 +0000[diff] [blame]200 <td class="complete" align="center"></td>
201 <td class="complete" align="center"></td>
202 <td class="complete" align="center"></td>
Sebastian Redld1309a32009-04-12 17:41:24 +0000[diff] [blame]203 <td class="broken"></td>
204 <td></td>
Sebastian Redl576fd422009-05-10 18:38:11 +0000[diff] [blame]205</tr>
206<tr>
207 <td>nullptr (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2431.pdf">N2431</a>)</td>
Douglas Gregor5a4d12a2009-05-12 17:55:28 +0000[diff] [blame]208 <td class="complete" align="center"></td>
209 <td class="complete" align="center"></td>
210 <td class="complete" align="center"></td>
Sebastian Redl576fd422009-05-10 18:38:11 +0000[diff] [blame]211 <td class="broken"></td>
212 <td></td>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]213</tr>
Douglas Gregorac1798a2009-06-15 16:50:45 +0000[diff] [blame]214<tr>
215 <td>Right angle brackets (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1757.html">N1757</a>)</td>
216 <td class="complete" align="center"></td>
217 <td class="na" align="center">N/A</td>
218 <td class="na" align="center">N/A</td>
219 <td class="na">N/A</td>
220 <td></td>
221</tr>
Anders Carlssonb7fe2d672009-06-24 22:10:19 +0000[diff] [blame]222<tr>
223 <td>Decltype (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2343.pdf">N2343</a>)</td>
224 <td class="complete" align="center">&#x2713;</td>
225 <td class="complete" align="center">&#x2713;</td>
226 <td class="complete" align="center">&#x2713;</td>
227 <td class="na">N/A</td>
228 <td></td>
229</tr>
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]230</table>
Douglas Gregor9e0d21a2009-05-12 18:36:58 +0000[diff] [blame]231<br />
Cedric Venet084381332009-02-14 20:20:19 +0000[diff] [blame]232</div>
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