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2009-02-25 23:22:45 +08:00
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2010-05-22 04:59:40 +08:00
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<title>Clang - C++ and C++'0x Status</title>
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2009-02-25 23:22:45 +08:00
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<!--*************************************************************************-->
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2010-05-22 04:59:40 +08:00
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<h1>C++ and C++'0x Support in Clang</h1>
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2009-02-15 04:20:19 +08:00
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<!--*************************************************************************-->
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2009-06-28 03:33:58 +08:00
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<p>Last updated: $Date$</p>
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2009-02-15 04:20:19 +08:00
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2010-02-06 07:51:14 +08:00
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<ul>
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<li><a href="#projects">Projects Building with Clang</a></li>
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<li><a href="#specification">Implementation Status by Section</a></li>
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<li><a href="#cxx0x">C++0x Status</a></li>
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</ul>
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2010-05-22 04:59:40 +08:00
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<p>Clang currently implements all of the ISO C++ 1998 standard (including
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2010-05-22 05:16:21 +08:00
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the defects addressed in the ISO C++ 2003 standard) except for 'export'
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(which has been removed from the C++'0x draft).
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2010-10-11 13:20:49 +08:00
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The <a href="http://llvm.org/bugs/">LLVM bug tracker</a>
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contains a Clang C++ component that tracks known Clang C++ bugs.</p>
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2010-02-06 07:51:14 +08:00
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2010-04-13 00:01:38 +08:00
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<h2 id="projects">Projects Building with Clang</h2>
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2010-02-06 07:51:14 +08:00
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2010-05-22 04:59:40 +08:00
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<p>Clang is now capable of compiling large C++ projects, and the following
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table describes various projects that we have attempted to compile with
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Clang++.</p>
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2010-02-06 07:51:14 +08:00
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<table width="689" border="1" cellspacing="0">
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<tr>
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<th>Project</th>
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<th>Status</th>
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<th>Last Tested</th>
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<th>Tracking Bug</th>
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</tr>
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<tr>
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<td><a href="http://clang.llvm.org">Clang</a> and <a href="http://llvm.org">LLVM</a></td>
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<td>Successful self-hosting achieved</td>
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<td>Continually</td>
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<td></td>
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</tr>
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2010-02-10 00:36:17 +08:00
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<tr>
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<td><a href="http://www.cmake.org">CMake</a></td>
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<td>Compiles, passes regression tests (debug build)</td>
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<td>February 9, 2010</td>
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<td></td>
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</tr>
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<tr>
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<td><a href="http://www.boost.org">Boost</a></td>
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<td><a href="http://blog.llvm.org/2010/05/clang-builds-boost.html">Compiles
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and passes regression tests</a> on Darwin/X86-64.</td>
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<td>May 20, 2010</td>
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2010-08-26 22:20:18 +08:00
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<td><a href="http://llvm.org/bugs/show_bug.cgi?id=6023"><del>PR6023</del></a></td>
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</tr>
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<tr>
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2010-02-10 00:50:54 +08:00
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<td><a href="http://qt.nokia.com">Qt</a></td>
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<td>Partially compiles; miscompilation of uic prevents complete compilation, qmake works, some small examples also.</td>
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<td>February 9, 2010</td>
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<td><a href="http://llvm.org/bugs/show_bug.cgi?id=5881">PR5881</a></td>
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</tr>
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2010-02-06 07:51:14 +08:00
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</table>
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2010-05-22 04:59:40 +08:00
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<h2 id="cxx0x">C++0x Implementation status</h2>
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<p>Clang's development effort is focused primarily on fixing bugs in the current
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ISO C++ standard (1998/2003). This section tracks the status of various C++0x
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features.</p>
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<h2 id="specification">Implementation Status by Feature</h2>
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<!-- Within this table: The colors we're using to color-code our level
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of support for a given section:
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White (no background): not considered/tested.
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#C11B17: Broken.
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#F88017: Some useful examples work
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#FDD017: Many examples work
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#347C17: Nearly everything works
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#00FF00 + check mark: Implementation complete!
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-->
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<p>The following table is used to help track our implementation
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progress toward implementing the complete C++'0x standard. We use a
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simple, somewhat arbitrary color-coding scheme to describe the
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relative completeness of features:</p>
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<table width="689" border="1" cellspacing="0">
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<tr>
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<th>Not started/not evaluated</th>
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<th>Not Applicable</th>
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<th>Broken</th>
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<th>Some examples work</th>
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<th>Many examples work</th>
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<th>Nearly everything works</th>
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<th>Complete</th>
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<th>Complete (with tests for each paragraph)</th>
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</tr>
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<tr>
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<td></td>
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<td class="na">N/A</td>
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<td class="broken"></td>
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<td class="basic"></td>
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<td class="medium"></td>
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<td class="advanced"></td>
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<td class="complete"></td>
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<td class="complete" align="center">✓</td>
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</tr>
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</table>
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<p>A feature is "complete" when the appropriate Clang component (Parse, AST,
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Sema, CodeGen) implements the behavior described in all of the
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paragraphs in the relevant C++'0x draft standard. The major
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components are:</p>
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<dl>
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<dt>Parse</dt>
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<dd>Clang is able to parse the grammar of this feature (or the grammar
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described by this section), but does not necessarily do anything with the
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parsed result. Use Clang's <code>-fsyntax-only</code> option to parse C++
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programs.</dd>
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<dt>AST</dt>
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<dd>Clang builds an abstract syntax tree (AST) for the feature, but does not
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necessarily perform any type-checking. Use Clang's <code>-ast-print</code>
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option to print the resulting ASTs.</dd>
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<dt>Sema</dt>
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<dd>Clang parses and type-checks this feature and provides a well-formed AST
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annotated with types. Use Clang's <code>-fsyntax-only</code> to type-check
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code.</dd>
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<dt>CodeGen</dt>
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<dd>Clang parses, type-checks, and generates code for this feature, allowing
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one to compile and execute programs.</dd>
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2009-02-15 04:20:19 +08:00
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</dl>
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2010-05-22 04:59:40 +08:00
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<p>Updates to this table are welcome! Tests for the various features are also
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welcome!</p>
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<table width="689" border="1" cellspacing="0">
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<tr><td colspan="6" align="center" bgcolor="#ffffcc">C++0x Features</td>
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</tr>
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<tr>
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<th>Feature</th>
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<th>Parse</th>
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<th>AST</th>
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<th>Sema</th>
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<th>CodeGen</th>
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<th>Notes</th>
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</tr>
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2010-02-06 07:51:14 +08:00
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2009-05-11 02:38:11 +08:00
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<tr>
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<td>Explicit conversion operators (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2437.pdf">N2437</a>)</td>
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<td class="complete" align="center"></td>
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<td class="basic" align="center"></td>
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<td class="basic" align="center"></td>
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<td class="broken"></td>
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<td>No name mangling; ASTs don't contain calls to conversion operators</td>
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2009-05-11 02:38:11 +08:00
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</tr>
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<tr>
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2009-03-17 01:28:26 +08:00
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<td>Static assertions (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1720.pdf">N1720</a>)</td>
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<td class="complete" align="center"></td>
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<td class="complete" align="center"></td>
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<td class="advanced" align="center"></td>
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2009-03-17 01:28:26 +08:00
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<td class="na">N/A</td>
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<td></td>
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</tr>
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<tr>
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2009-04-13 01:41:24 +08:00
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<td>Deleted functions (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2346.htm">N2346</a>)</td>
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<td class="complete" align="center"></td>
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<td class="complete" align="center"></td>
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<td class="medium" align="center"></td>
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2009-04-13 01:41:24 +08:00
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<td class="na">N/A</td>
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<td></td>
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</tr>
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<tr>
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2009-04-13 01:41:24 +08:00
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<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>
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<td class="complete" align="center"></td>
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<td class="complete" align="center"></td>
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<td class="broken" align="center"></td>
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2009-04-13 01:41:24 +08:00
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<td class="broken"></td>
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<td></td>
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2009-05-11 02:38:11 +08:00
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</tr>
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<tr>
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<td>nullptr (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2431.pdf">N2431</a>)</td>
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<td class="complete" align="center"></td>
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<td class="complete" align="center"></td>
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<td class="medium" align="center"></td>
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<td class="broken"></td>
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<td></td>
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</tr>
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2009-06-16 00:50:45 +08:00
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<tr>
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<td>Right angle brackets (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1757.html">N1757</a>)</td>
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<td class="complete" align="center"></td>
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<td class="na" align="center">N/A</td>
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<td class="na" align="center">N/A</td>
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<td class="na">N/A</td>
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<td></td>
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</tr>
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2009-06-25 06:10:19 +08:00
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<tr>
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<td>Decltype (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2343.pdf">N2343</a>)</td>
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<td class="complete" align="center">✓</td>
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<td class="complete" align="center">✓</td>
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<td class="advanced" align="center"></td>
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<td class="na">N/A</td>
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<td></td>
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</tr>
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<tr>
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<td>noexcept (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3050.html">N3050</a>)</td>
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<td class="complete" align="center">✓</td>
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<td class="complete" align="center">✓</td>
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<td class="complete" align="center">✓</td>
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<td class="na">N/A</td>
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<td></td>
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</tr>
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<tr>
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<td>Inline namespaces (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2535.htm">N2535</a>)</td>
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<td class="complete" align="center">✓</td>
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<td class="complete" align="center">✓</td>
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<td class="complete" align="center">✓</td>
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<td class="complete" align="center">N/A</td>
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<td></td>
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</tr>
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</table>
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<br />
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</div>
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</body>
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</html>
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