1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" 2 "http://www.w3.org/TR/html4/strict.dtd"> 3 <!-- Material used from: HTML 4.01 specs: http://www.w3.org/TR/html401/ --> 4 <html> 5 <head> 6 <meta http-equiv="content-type" content="text/html; charset=utf-8"> 7 <title>libc++ C++2a Status</title> 8 <link type="text/css" rel="stylesheet" href="menu.css"> 9 <link type="text/css" rel="stylesheet" href="content.css"> 10 </head> 11 12 <body> 13 <div id="menu"> 14 <div> 15 <a href="http://llvm.org/">LLVM Home</a> 16 </div> 17 18 <div class="submenu"> 19 <label>libc++ Info</label> 20 <a href="/index.html">About</a> 21 </div> 22 23 <div class="submenu"> 24 <label>Quick Links</label> 25 <a href="http://lists.llvm.org/mailman/listinfo/cfe-dev">cfe-dev</a> 26 <a href="http://lists.llvm.org/mailman/listinfo/cfe-commits">cfe-commits</a> 27 <a href="https://bugs.llvm.org/">Bug Reports</a> 28 <a href="http://llvm.org/svn/llvm-project/libcxx/trunk/">Browse SVN</a> 29 <a href="http://llvm.org/viewvc/llvm-project/libcxx/trunk/">Browse ViewVC</a> 30 </div> 31 </div> 32 33 <div id="content"> 34 <!--*********************************************************************--> 35 <h1>libc++ C++2a Status</h1> 36 <!--*********************************************************************--> 37 38 <p>In July 2017, the C++ standard committee created a draft for the next version of the C++ standard, known here as "C++2a" (probably to be C++20).</p> 39 <p>This page shows the status of libc++; the status of clang's support of the language features is <a href="http://clang.llvm.org/cxx_status.html#cxx2a">here</a>.</p> 40 41 <p>The groups that have contributed papers: 42 <ul> 43 <li>LWG - Library working group</li> 44 <li>CWG - Core Language Working group</li> 45 <li>SG1 - Study group #1 (Concurrency working group)</li> 46 </ul> 47 </p> 48 49 <h3>Paper Status</h3> 50 <table id="papers" border="1"> 51 <tr><th>Paper #</th><th>Group</th><th>Paper Name</th><th>Meeting</th><th>Status</th><th>First released version</th></tr> 52 <!-- 53 <tr><td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3346.pdf">3346</a></td><td>LWG</td><td>Terminology for Container Element Requirements - Rev 1</td><td>Kona</td><td>Complete</td><td>3.4</td></tr> 54 --> 55 <tr><td><a href="https://wg21.link/P0463R1">P0463R1</a></td><td>LWG</td><td>Endian just Endian</td><td>Toronto</td><td></td><td></td></tr> 56 <tr><td><a href="https://wg21.link/P0674R1">P0674R1</a></td><td>LWG</td><td>Extending make_shared to Support Arrays</td><td>Toronto</td><td></td><td></td></tr> 57 58 <!-- <tr><td></td><td></td><td></td><td></td><td></td><td></td></tr> --> 59 </table> 60 61 <p><i>[ Note: "Nothing to do" means that no library changes were needed to implement this change -- end note]</i></p> 62 63 <h3>Library Working group Issues Status</h3> 64 <!-- <I>Note: "NAD" means that the issue was deemed "Not a defect"</I> --> 65 <table id="issues" border="1"> 66 <tr><th>Issue #</th><th>Issue Name</th><th>Meeting</th><th>Status</th></tr> 67 <!-- 68 <tr><td><a href="http://wg21.link/LWG1214">1214</a></td><td>Insufficient/inconsistent key immutability requirements for associative containers</td><td>Urbana</td><td></td></tr> 69 --> 70 <tr><td><a href="http://wg21.link/LWG2070">2070</a></td><td><tt>allocate_shared</tt> should use <tt>allocator_traits<A>::construct</tt></td><td>Toronto</td><td>Resolved by <a href="https://wg21.link/P0674R1">P0674R1</a></td></tr> 71 <tr><td><a href="http://wg21.link/LWG2444">2444</a></td><td>Inconsistent complexity for <tt>std::sort_heap</tt></td><td>Toronto</td><td></td></tr> 72 <tr><td><a href="http://wg21.link/LWG2593">2593</a></td><td>Moved-from state of Allocators</td><td>Toronto</td><td></td></tr> 73 <tr><td><a href="http://wg21.link/LWG2597">2597</a></td><td><tt>std::log</tt> misspecified for complex numbers</td><td>Toronto</td><td></td></tr> 74 <tr><td><a href="http://wg21.link/LWG2783">2783</a></td><td><tt>stack::emplace()</tt> and <tt>queue::emplace()</tt> should return <tt>decltype(auto)</tt></td><td>Toronto</td><td></td></tr> 75 <tr><td><a href="http://wg21.link/LWG2932">2932</a></td><td>Constraints on parallel algorithm implementations are underspecified</td><td>Toronto</td><td></td></tr> 76 <tr><td><a href="http://wg21.link/LWG2937">2937</a></td><td>Is <tt>equivalent("existing_thing", "not_existing_thing")</tt> an error</td><td>Toronto</td><td>Complete</td></tr> 77 <tr><td><a href="http://wg21.link/LWG2940">2940</a></td><td><tt>result_of</tt> specification also needs a little cleanup</td><td>Toronto</td><td></td></tr> 78 <tr><td><a href="http://wg21.link/LWG2942">2942</a></td><td>LWG 2873's resolution missed <tt>weak_ptr::owner_before</tt></td><td>Toronto</td><td></td></tr> 79 <tr><td><a href="http://wg21.link/LWG2954">2954</a></td><td>Specialization of the convenience variable templates should be prohibited</td><td>Toronto</td><td></td></tr> 80 <tr><td><a href="http://wg21.link/LWG2961">2961</a></td><td>Bad postcondition for <tt>set_default_resource</tt></td><td>Toronto</td><td></td></tr> 81 <tr><td><a href="http://wg21.link/LWG2966">2966</a></td><td>Incomplete resolution of US 74</td><td>Toronto</td><td><i>Nothing to do</i></td></tr> 82 <tr><td><a href="http://wg21.link/LWG2974">2974</a></td><td>Diagnose out of bounds <tt>tuple_element/variant_alternative</tt></td><td>Toronto</td><td>Complete</td></tr> 83 84 <!-- <tr><td></td><td></td><td></td><td></td></tr> --> 85 </table> 86 87 <p>Last Updated: 16-Jul-2017</p> 88 </div> 89 </body> 90 </html> 91
