libstdc++-v3/doc/xml/manual/status_cxx2023.xml

   1 <section xmlns="http://docbook.org/ns/docbook" version="5.0"
   2    xml:id="status.iso.2023" xreflabel="Status C++ 2023">
   3 <?dbhtml filename="status_iso_cxx2023.html"?>
   4
   5 <info><title>C++ 2023</title>
   6   <keywordset>
   7     <keyword>ISO C++</keyword>
   8     <keyword>2023</keyword>
   9   </keywordset>
  10 </info>
  11
  12 <para>
  13 In this implementation the <literal>-std=gnu++23</literal> or
  14 <literal>-std=c++23</literal> flag must be used to enable language
  15 and library
  16 features. See <link linkend="manual.intro.using.flags">dialect</link>
  17 options. The pre-defined symbol
  18 <constant>__cplusplus</constant> is used to check for the
  19 presence of the required flag.
  20 </para>
  21
  22 <para>
  23 This section describes the C++23 and library TS support in
  24 mainline GCC, not in any particular release.
  25 </para>
  26
  27 <para>
  28 The following table lists new library features that have been accepted into
  29 the C++23 working draft. The "Proposal" column provides a link to the
  30 ISO C++ committee proposal that describes the feature, while the "Status"
  31 column indicates the first version of GCC that contains an implementation of
  32 this feature (if it has been implemented).
  33 A dash (&#x2014;) in the status column indicates that the changes in the proposal
  34 either do not affect the code in libstdc++, or the changes are not required for conformance.
  35 The "SD-6 Feature Test / Notes" column shows the corresponding macro or header from
  36 <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations">SD-6:
  37 Feature-testing recommendations for C++</link> (where applicable)
  38 or any notes about the implementation.
  39 </para>
  40
  41 <table frame="all" xml:id="table.cxx23_features">
  42 <title>C++ 2023 Library Features</title>
  43
  44 <tgroup cols="4" align="left" colsep="0" rowsep="1">
  45 <colspec colname="c1"/>
  46 <colspec colname="c2"/>
  47 <colspec colname="c3"/>
  48 <colspec colname="c4"/>
  49   <thead>
  50     <row>
  51       <entry>Library Feature</entry>
  52       <entry>Proposal</entry>
  53       <entry>Status</entry>
  54       <entry>SD-6 Feature Test / Notes</entry>
  55     </row>
  56   </thead>
  57
  58   <tbody>
  59
  60     <row>
  61       <entry namest="c1" nameend="c4" align="left">
  62         <emphasis role="bold">Ranges and Views</emphasis>
  63       </entry>
  64     </row>
  65
  66     <row>
  67       <entry> Range constructor for std::string_view </entry>
  68       <entry>
  69         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1989r2.pdf">
  70         P1989R2
  71         </link>
  72       </entry>
  73       <entry align="center"> 11.1 </entry>
  74       <entry />
  75     </row>
  76
  77     <row>
  78       <entry> <code>join_view</code> should join all views of ranges </entry>
  79       <entry>
  80         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2328r1.html">
  81         P2328R1
  82         </link>
  83       </entry>
  84       <entry align="center"> 11.2 </entry>
  85       <entry />
  86     </row>
  87
  88
  89     <row>
  90       <entry> Clarifying range adaptor objects </entry>
  91       <entry>
  92         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2281r1.html">
  93         P2281R1
  94         </link>
  95       </entry>
  96       <entry align="center"> 11.1 </entry>
  97       <entry />
  98     </row>
  99
 100     <row>
 101       <entry> Views should not be required to be default constructible </entry>
 102       <entry>
 103         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2325r3.html">
 104         P2325R3
 105         </link>
 106       </entry>
 107       <entry align="center"> 11.3 </entry>
 108       <entry> <code>__cpp_lib_ranges &gt;= 202106L</code> </entry>
 109     </row>
 110
 111     <row>
 112       <entry> Conditionally borrowed ranges </entry>
 113       <entry>
 114         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p2017r1.html">
 115         P2017R1
 116         </link>
 117       </entry>
 118       <entry align="center"> 11.1 </entry>
 119       <entry />
 120     </row>
 121
 122     <row>
 123       <entry> Require <code>span</code> &amp; <code>basic_string_view</code> to be Trivially Copyable </entry>
 124       <entry>
 125         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2251r1.pdf">
 126         P2251R1
 127         </link>
 128       </entry>
 129       <entry align="center"> Yes </entry>
 130       <entry />
 131     </row>
 132
 133     <row>
 134       <entry> Repairing input range adaptors and counted_iterator </entry>
 135       <entry>
 136         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2259r1.html">
 137         P2259R1
 138         </link>
 139       </entry>
 140       <entry align="center"> 12.1 </entry>
 141       <entry />
 142     </row>
 143
 144     <row>
 145       <entry> Superior String Splitting </entry>
 146       <entry>
 147         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2210r2.html">
 148         P2210R2
 149         </link>
 150       </entry>
 151       <entry align="center"> 12.1 </entry>
 152       <entry />
 153     </row>
 154
 155     <row>
 156       <entry> What is a <code>view</code>? </entry>
 157       <entry>
 158         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2415r2.html">
 159         P2415R2
 160         </link>
 161       </entry>
 162       <entry align="center"> 12.1 </entry>
 163       <entry> <code>__cpp_lib_ranges &gt;= 202110L</code> </entry>
 164     </row>
 165
 166     <row>
 167       <entry> Fix istream_view </entry>
 168       <entry>
 169         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2432r1.pdf">
 170         P2432R1
 171         </link>
 172       </entry>
 173       <entry align="center"> 12.1 </entry>
 174       <entry />
 175     </row>
 176
 177     <row>
 178       <?dbhtml bgcolor="#C8B0B0" ?>
 179       <entry> <code>starts_with</code> and <code>ends_with</code> </entry>
 180       <entry>
 181         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1659r3.html">
 182         P1659R3
 183         </link>
 184       </entry>
 185       <entry align="center"> </entry>
 186       <entry> <code>__cpp_lib_ranges_starts_ends_with &gt;= 202106L</code> </entry>
 187     </row>
 188
 189     <row>
 190       <entry> <code>zip</code> </entry>
 191       <entry>
 192         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2321r2.html">
 193         P2321R2
 194         </link>
 195       </entry>
 196       <entry align="center"> 13.1 </entry>
 197       <entry> <code>__cpp_lib_ranges_zip &gt;= 202110L</code> </entry>
 198     </row>
 199
 200     <row>
 201       <entry> <code>views::repeat</code> </entry>
 202       <entry>
 203         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2474r2.html">
 204         P2474R2
 205         </link>
 206       </entry>
 207       <entry align="center"> 13.1 </entry>
 208       <entry> <code>__cpp_lib_ranges_repeat &gt;= 202207L</code> </entry>
 209     </row>
 210
 211     <row>
 212       <entry> <code>views::enumerate</code> </entry>
 213       <entry>
 214         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2164r9.pdf">
 215         P2164R9
 216         </link>
 217       </entry>
 218       <entry align="center"> 13.1 </entry>
 219       <entry> <code>__cpp_lib_ranges_enumerate &gt;= 202302L</code> </entry>
 220     </row>
 221
 222     <row>
 223       <entry> <code>views::join_with</code> </entry>
 224       <entry>
 225         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2441r2.html">
 226         P2441R2
 227         </link>
 228       </entry>
 229       <entry align="center"> 13.1 </entry>
 230       <entry> <code>__cpp_lib_ranges_join_with &gt;= 202202L</code> </entry>
 231     </row>
 232
 233     <row>
 234       <entry>
 235         Windowing range adaptors: <code>views::chunk</code>
 236         and <code>views::slide</code> </entry>
 237       <entry>
 238         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2442r1.html">
 239         P2442R1
 240         </link>
 241       </entry>
 242       <entry align="center"> 13.1 </entry>
 243       <entry> <code>__cpp_lib_ranges_slide &gt;= 202202L</code> </entry>
 244     </row>
 245
 246     <row>
 247       <entry> <code>views::chunk_by</code> </entry>
 248       <entry>
 249         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2443r1.html">
 250         P2443R1
 251         </link>
 252       </entry>
 253       <entry align="center"> 13.1 </entry>
 254       <entry> <code>__cpp_lib_ranges_chunk_by &gt;= 202202L</code> </entry>
 255     </row>
 256
 257     <row>
 258       <entry> <code>views::stride</code> </entry>
 259       <entry>
 260         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p1899r3.html">
 261         P1899R3
 262         </link>
 263       </entry>
 264       <entry align="center"> 13.1 </entry>
 265       <entry> <code>__cpp_lib_ranges_stride &gt;= 202207L</code> </entry>
 266     </row>
 267
 268     <row>
 269       <entry> <code>views::cartesian_product</code> </entry>
 270       <entry>
 271         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2374r4.html">
 272         P2374R4
 273         </link>
 274       </entry>
 275       <entry align="center"> 13.1 </entry>
 276       <entry> <code>__cpp_lib_ranges_cartesian_product &gt;= 202207L</code> </entry>
 277     </row>
 278
 279     <row>
 280       <entry> Empty Product for certain Views </entry>
 281       <entry>
 282         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2540r1.html">
 283         P2540R1
 284         </link>
 285       </entry>
 286       <entry align="center"> 13.1 </entry>
 287       <entry> <code>__cpp_lib_ranges_cartesian_product &gt;= 202207L</code> </entry>
 288     </row>
 289
 290     <row>
 291       <entry> <code>views::as_rvalue</code> </entry>
 292       <entry>
 293         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2446r2.html">
 294         P2446R2
 295         </link>
 296       </entry>
 297       <entry align="center"> 13.1 </entry>
 298       <entry> <code>__cpp_lib_ranges_as_rvalue &gt;= 202207L</code> </entry>
 299     </row>
 300
 301     <row>
 302       <entry>
 303         <code>cbegin</code> should always return a constant iterator
 304       </entry>
 305       <entry>
 306         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2278r4.html">
 307         P2278R4
 308         </link>
 309       </entry>
 310       <entry align="center"> 13.1 </entry>
 311       <entry> <code>__cpp_lib_ranges_as_const &gt;= 202207L</code> </entry>
 312     </row>
 313
 314     <row>
 315       <?dbhtml bgcolor="#B0B0B0" ?>
 316       <entry> <code>ranges::to</code> </entry>
 317       <entry>
 318         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p1206r7.pdf">
 319         P1206R7
 320         </link>
 321       </entry>
 322       <entry align="center"> 14.1 (<code>ranges::to</code> function) </entry>
 323       <entry>
 324         <code>__cpp_lib_containers_ranges &gt;= 202202L</code>,
 325         <code>__cpp_lib_ranges_to_container &gt;= 202202L</code>
 326       </entry>
 327     </row>
 328
 329     <row>
 330       <?dbhtml bgcolor="#C8B0B0" ?>
 331       <entry> Ranges iterators as inputs to non-Ranges algorithms </entry>
 332       <entry>
 333         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2408r5.html">
 334         P2408R5
 335         </link>
 336       </entry>
 337       <entry align="center"> </entry>
 338       <entry>
 339         <code>__cpp_lib_algorithm_iterator_requirements &gt;= 202207L</code>
 340       </entry>
 341     </row>
 342
 343     <row>
 344       <entry> Pipe support for user-defined range adaptors </entry>
 345       <entry>
 346         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2387r3.html">
 347         P2387R3
 348         </link>
 349       </entry>
 350       <entry align="center"> 13.1 </entry>
 351       <entry>
 352         <code>__cpp_lib_bind_pack &gt;= 202202L</code>,
 353         <code>__cpp_lib_ranges &gt;= 202202L</code>
 354       </entry>
 355     </row>
 356
 357     <row>
 358       <?dbhtml bgcolor="#B0B0B0" ?>
 359       <entry>
 360         <code>ranges::iota</code>, <code>ranges::shift_left</code>,
 361         and <code>ranges::shift_right</code>
 362       </entry>
 363       <entry>
 364         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2440r1.html">
 365         P2440R1
 366         </link>
 367       </entry>
 368       <entry align="center"> 13.1 (<code>ranges::iota</code>) </entry>
 369       <entry>
 370         <code>__cpp_lib_ranges_iota &gt;= 202202L</code>,
 371         <code>__cpp_lib_shift &gt;= 202202L</code>
 372       </entry>
 373     </row>
 374
 375     <row>
 376       <entry> <code>ranges::find_last</code> </entry>
 377       <entry>
 378         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p1223r5.pdf">
 379         P1223R5
 380         </link>
 381       </entry>
 382       <entry align="center"> 13.1 </entry>
 383       <entry> <code>__cpp_lib_ranges_find_last &gt;= 202207L</code> </entry>
 384     </row>
 385
 386     <row>
 387       <entry> <code>ranges::contains</code> </entry>
 388       <entry>
 389         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2302r4.html">
 390         P2302R4
 391         </link>
 392       </entry>
 393       <entry align="center"> 13.1 </entry>
 394       <entry> <code>__cpp_lib_ranges_contains &gt;= 202207L</code> </entry>
 395     </row>
 396
 397     <row>
 398       <?dbhtml bgcolor="#C8B0B0" ?>
 399       <entry> Making multi-param constructors of views explicit </entry>
 400       <entry>
 401         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2711r1.html">
 402         P2711R1
 403         </link>
 404       </entry>
 405       <entry align="center"> </entry>
 406       <entry/>
 407     </row>
 408
 409     <row>
 410       <entry> <code>ranges::fold</code> </entry>
 411       <entry>
 412         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2322r6.html">
 413         P2322R6
 414         </link>
 415       </entry>
 416       <entry align="center"> 13.1 </entry>
 417       <entry> <code>__cpp_lib_ranges_fold &gt;= 202207L</code> </entry>
 418     </row>
 419
 420     <row>
 421       <?dbhtml bgcolor="#C8B0B0" ?>
 422       <entry> Relaxing Ranges Just A Smidge</entry>
 423       <entry>
 424         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2609r3.html">
 425         P2609R3
 426         </link>
 427       </entry>
 428       <entry align="center"> </entry>
 429       <entry> <code>__cpp_lib_ranges &gt;= 202302L</code> </entry>
 430     </row>
 431
 432     <row>
 433       <entry namest="c1" nameend="c4" align="left">
 434         <emphasis role="bold">Compile-time programming</emphasis>
 435       </entry>
 436     </row>
 437
 438     <row>
 439       <entry> A proposal for a type trait to detect scoped enumerations </entry>
 440       <entry>
 441         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p1048r1.pdf">
 442         P1048R1
 443         </link>
 444       </entry>
 445       <entry align="center"> 11.1 </entry>
 446       <entry> <code>__cpp_lib_is_scoped_enum &gt;= 202011L</code> </entry>
 447     </row>
 448
 449     <row>
 450       <entry> std::to_underlying for enumerations </entry>
 451       <entry>
 452         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1682r3.html">
 453         P1682R3
 454         </link>
 455       </entry>
 456       <entry align="center"> 11.1 </entry>
 457       <entry> <code>__cpp_lib_to_underlying &gt;= 202102L</code> </entry>
 458     </row>
 459
 460     <row>
 461       <entry> Missing constexpr in std::optional and std::variant </entry>
 462       <entry>
 463         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2231r1.html">
 464         P2231R1
 465         </link>
 466       </entry>
 467       <entry align="center">
 468         <informaltable colsep="0" rowsep="0" rowheader="norowheader" frame="none"><tgroup cols="1"><tbody>
 469         <row><entry> 11.3 (<code>optional</code>) </entry></row>
 470         <row><entry> 12.1 (<code>variant</code>) </entry></row>
 471         </tbody></tgroup></informaltable>
 472       </entry>
 473       <entry>
 474         <informaltable colsep="0" rowsep="0" rowheader="norowheader" frame="none"><tgroup cols="1"><tbody>
 475         <row><entry> <code>__cpp_lib_constexpr_optional &gt;= 202106L</code> </entry></row>
 476         <row><entry> <code>__cpp_lib_variant &gt;= 202106L</code> </entry></row>
 477         </tbody></tgroup></informaltable>
 478       </entry>
 479     </row>
 480
 481     <row>
 482       <entry> Making <code>std::unique_ptr</code> constexpr </entry>
 483       <entry>
 484         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2273r3.pdf">
 485         P2273R3
 486         </link>
 487       </entry>
 488       <entry align="center"> 12.1 </entry>
 489       <entry> <code>__cpp_lib_constexpr_memory &gt;= 202202L</code> </entry>
 490     </row>
 491
 492     <row>
 493       <entry> Making <code>std::type_info::operator==</code> constexpr </entry>
 494       <entry>
 495         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1328r1.html">
 496         P1328R1
 497         </link>
 498       </entry>
 499       <entry align="center"> 12.1 </entry>
 500       <entry> <code>__cpp_lib_constexpr_typeinfo &gt;= 202106L</code> </entry>
 501     </row>
 502
 503     <row>
 504       <?dbhtml bgcolor="#C8B0B0" ?>
 505       <entry> constexpr for <code>&lt;cmath&gt;</code> and <code>&lt;cstdlib&gt;</code> </entry>
 506       <entry>
 507         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p0533r9.pdf">
 508         P0533R9
 509         </link>
 510       </entry>
 511       <entry align="center"> </entry>
 512       <entry> <code>__cpp_lib_constexpr_cmath &gt;= 202202L</code> </entry>
 513     </row>
 514
 515     <row>
 516       <?dbhtml bgcolor="#C8B0B0" ?>
 517       <entry> Deprecate std::aligned_storage and std::aligned_union </entry>
 518       <entry>
 519         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1413r3.pdf">
 520         P1413R3
 521         </link>
 522       </entry>
 523       <entry align="center"> </entry>
 524       <entry />
 525     </row>
 526
 527     <row>
 528       <entry> A type trait to detect reference binding to temporary </entry>
 529       <entry>
 530         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2255r2.html">
 531         P2255R2
 532         </link>
 533       </entry>
 534       <entry align="center">
 535         <informaltable colsep="0" rowsep="0" rowheader="norowheader" frame="none"><tgroup cols="1"><tbody>
 536         <row><entry> 13.1 (missing changes to <code>std::tuple</code>) </entry></row>
 537         <row><entry> 14.1 (complete) </entry></row>
 538         </tbody></tgroup></informaltable>
 539       </entry>
 540       <entry> <code>__cpp_lib_reference_from_temporary &gt;= 202202L</code> </entry>
 541     </row>
 542
 543     <row>
 544       <?dbhtml bgcolor="#C8B0B0" ?>
 545       <entry>
 546         Move-only types for equality_comparable_with, totally_ordered_with,
 547         and three_way_comparable_with
 548       </entry>
 549       <entry>
 550         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2404r3.pdf">
 551         P2404R3
 552         </link>
 553       </entry>
 554       <entry align="center"> </entry>
 555       <entry> <code>__cpp_lib_concepts &gt;= 202207L</code> </entry>
 556     </row>
 557
 558     <row>
 559       <?dbhtml bgcolor="#C8B0B0" ?>
 560       <entry> A trait for implicit lifetime types </entry>
 561       <entry>
 562         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2674r1.pdf">
 563         P2674R1
 564         </link>
 565       </entry>
 566       <entry align="center"> </entry>
 567       <entry> <code>__cpp_lib_is_implicit_lifetime &gt;= 202302L</code> </entry>
 568     </row>
 569
 570     <row>
 571       <?dbhtml bgcolor="#C8B0B0" ?>
 572       <entry>
 573         <code>common_reference_t</code> of <code>reference_wrapper</code>
 574         Should Be a Reference Type
 575       </entry>
 576       <entry>
 577         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2655r3.html">
 578         P2655R3
 579         </link>
 580       </entry>
 581       <entry align="center"> </entry>
 582       <entry> <code>__cpp_lib_common_reference &gt;= 202302L</code> </entry>
 583     </row>
 584
 585     <row>
 586       <?dbhtml bgcolor="#C8B0B0" ?>
 587       <entry> Deprecate <code>numeric_limits::has_denorm</code> </entry>
 588       <entry>
 589         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2614r2.pdf">
 590         P2614R2
 591         </link>
 592       </entry>
 593       <entry align="center"> </entry>
 594       <entry/>
 595     </row>
 596
 597     <row>
 598       <entry namest="c1" nameend="c4" align="left">
 599         <emphasis role="bold">Containers</emphasis>
 600       </entry>
 601     </row>
 602
 603     <row>
 604       <entry> Iterator pair constructors for stack and queue </entry>
 605       <entry>
 606         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1425r4.pdf">
 607         P1425R4
 608         </link>
 609       </entry>
 610       <entry align="center"> 12.1 </entry>
 611       <entry> <code>__cpp_lib_adaptor_iterator_pair_constructor &gt;= 202106L</code> </entry>
 612     </row>
 613
 614     <row>
 615       <entry> Stop overconstraining allocators in container deduction guides </entry>
 616       <entry>
 617         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1518r2.html">
 618         P1518R2
 619         </link>
 620       </entry>
 621       <entry align="center"> 12.1 </entry>
 622       <entry />
 623     </row>
 624
 625     <row>
 626       <?dbhtml bgcolor="#C8B0B0" ?>
 627       <entry> Heterogeneous erasure overloads for associative containers </entry>
 628       <entry>
 629         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2077r3.html">
 630         P2077R3
 631         </link>
 632       </entry>
 633       <entry align="center"> </entry>
 634       <entry> <code>__cpp_lib_associative_heterogeneous_erasure &gt;= 202110L</code> </entry>
 635     </row>
 636
 637     <row>
 638       <?dbhtml bgcolor="#C8B0B0" ?>
 639       <entry> <code>&lt;flat_map&gt;</code> </entry>
 640       <entry>
 641         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p0429r9.pdf">
 642         P0429R9
 643         </link>
 644       </entry>
 645       <entry align="center"> </entry>
 646       <entry> <code>__cpp_lib_flat_map &gt;= 202207L</code> </entry>
 647     </row>
 648
 649     <row>
 650       <?dbhtml bgcolor="#C8B0B0" ?>
 651       <entry> <code>&lt;flat_set&gt;</code> </entry>
 652       <entry>
 653         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p1222r4.pdf">
 654         P1222R4
 655         </link>
 656       </entry>
 657       <entry align="center"> </entry>
 658       <entry> <code>__cpp_lib_flat_set &gt;= 202207L</code> </entry>
 659     </row>
 660
 661     <row>
 662       <?dbhtml bgcolor="#C8B0B0" ?>
 663       <entry> <code>mdspan</code> </entry>
 664       <entry>
 665         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p0009r18.html">
 666         P0009R18
 667         </link>
 668       </entry>
 669       <entry align="center"> </entry>
 670       <entry> <code>__cpp_lib_mdspan &gt;= 202207L</code> </entry>
 671     </row>
 672
 673     <row>
 674       <?dbhtml bgcolor="#C8B0B0" ?>
 675       <entry>
 676         <code>index_type</code> &amp; <code>size_type</code>
 677         in <code>mdspan</code>
 678       </entry>
 679       <entry>
 680         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2599r2.pdf">
 681         P2599R2
 682         </link>
 683       </entry>
 684       <entry align="center"> </entry>
 685       <entry> <code>__cpp_lib_mdspan &gt;= 202207L</code> </entry>
 686     </row>
 687
 688     <row>
 689       <?dbhtml bgcolor="#C8B0B0" ?>
 690       <entry>
 691         <code>mdspan</code>: rename <code>pointer</code> and
 692         <code>contiguous</code>
 693       </entry>
 694       <entry>
 695         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2604r0.html">
 696         P2604R0
 697         </link>
 698       </entry>
 699       <entry align="center"> </entry>
 700       <entry> <code>__cpp_lib_mdspan &gt;= 202207L</code> </entry>
 701     </row>
 702
 703     <row>
 704       <?dbhtml bgcolor="#C8B0B0" ?>
 705       <entry> Add the missing <code>empty</code> to <code>mdspan</code> </entry>
 706       <entry>
 707         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2613r1.html">
 708         P2613R1
 709         </link>
 710       </entry>
 711       <entry align="center"> </entry>
 712       <entry> <code>__cpp_lib_mdspan &gt;= 202207L</code> </entry>
 713     </row>
 714
 715     <row>
 716       <?dbhtml bgcolor="#C8B0B0" ?>
 717       <entry>
 718         <code>layout_stride</code> static extents default constructor fix
 719       </entry>
 720       <entry>
 721         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2763r1.html">
 722         P2763R1
 723         </link>
 724       </entry>
 725       <entry align="center"> </entry>
 726       <entry/>
 727     </row>
 728
 729     <row>
 730       <entry namest="c1" nameend="c4" align="left">
 731         <emphasis role="bold">Strings and text</emphasis>
 732       </entry>
 733     </row>
 734
 735     <row>
 736       <entry> string contains function </entry>
 737       <entry>
 738         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p1679r3.html">
 739         P1679R3
 740         </link>
 741       </entry>
 742       <entry align="center"> 11.1 </entry>
 743       <entry> <code>__cpp_lib_string_contains &gt;= 202011L</code> </entry>
 744     </row>
 745
 746     <row>
 747       <entry> Prohibit std::basic_string and std::basic_string_view construction from nullptr </entry>
 748       <entry>
 749         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p2166r1.html">
 750         P2166R1
 751         </link>
 752       </entry>
 753       <entry align="center"> 12.1 </entry>
 754       <entry />
 755     </row>
 756
 757     <row>
 758       <entry> basic_string::resize_and_overwrite </entry>
 759       <entry>
 760         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1072r10.html">
 761         P1072R10
 762         </link>
 763       </entry>
 764       <entry align="center"> 12.1 </entry>
 765       <entry> <code>__cpp_lib_resize_and_overwrite &gt;= 202110L</code> </entry>
 766     </row>
 767
 768     <row>
 769       <entry> A strstream replacement using span&lt;charT&gt; as buffer </entry>
 770       <entry>
 771         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p0448r4.pdf">
 772         P0448R4
 773         </link>
 774       </entry>
 775       <entry align="center"> 12.1 </entry>
 776       <entry> <code>__cpp_lib_spanstream &gt;= 202106L</code> </entry>
 777     </row>
 778
 779     <row>
 780       <?dbhtml bgcolor="#C8B0B0" ?>
 781       <entry> <code> std::string::substr() &amp;&amp; </code> </entry>
 782       <entry>
 783         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2438r2.html">
 784         P2438R2
 785         </link>
 786       </entry>
 787       <entry align="center"> </entry>
 788       <entry/>
 789     </row>
 790
 791
 792     <row>
 793       <entry> std::format improvements </entry>
 794       <entry>
 795         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2216r3.html">
 796         P2216R3
 797         </link>
 798       </entry>
 799       <entry align="center"> 13.1 </entry>
 800       <entry> <code>__cpp_lib_format &gt;= 202106L</code> </entry>
 801     </row>
 802
 803     <row>
 804       <entry>
 805         Add support for <code>std::generator</code>-like types to
 806         <code>std::format</code>
 807       </entry>
 808       <entry>
 809         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2418r2.html">
 810         P2418R2
 811         </link>
 812       </entry>
 813       <entry align="center"> 13.1 </entry>
 814       <entry> <code>__cpp_lib_format &gt;= 202110L</code> </entry>
 815     </row>
 816
 817     <row>
 818       <entry>
 819         Expose <code>std::<emphasis>basic-format-string</emphasis>&lt;charT, Args...&gt;</code>
 820       </entry>
 821       <entry>
 822         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2508r1.html">
 823         P2508R1
 824         </link>
 825       </entry>
 826       <entry align="center"> 13.1 (feature test macro not defined)</entry>
 827       <entry> <code>__cpp_lib_format &gt;= 202207L</code> </entry>
 828     </row>
 829
 830     <row>
 831       <?dbhtml bgcolor="#C8B0B0" ?>
 832       <entry>
 833         Clarify handling of encodings in localized formatting of chrono types
 834       </entry>
 835       <entry>
 836         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2419r2.html">
 837         P2419R2
 838         </link>
 839       </entry>
 840       <entry align="center"> </entry>
 841       <entry> <code>__cpp_lib_format &gt;= 202207L</code> </entry>
 842     </row>
 843
 844     <row>
 845       <entry>
 846         Formatting pointers
 847       </entry>
 848       <entry>
 849         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2510r3.pdf">
 850         P2510R3
 851         </link>
 852       </entry>
 853       <entry align="center"> 13.2 (feature test macro not defined)</entry>
 854       <entry> <code>__cpp_lib_format &gt;= 202207L</code> </entry>
 855     </row>
 856
 857     <row>
 858       <?dbhtml bgcolor="#C8B0B0" ?>
 859       <entry> Formatting Ranges </entry>
 860       <entry>
 861         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2286r8.html">
 862         P2286R8
 863         </link>
 864       </entry>
 865       <entry align="center"> </entry>
 866       <entry> <code>__cpp_lib_format_ranges &gt;= 202207L</code> </entry>
 867     </row>
 868
 869     <row>
 870       <?dbhtml bgcolor="#C8B0B0" ?>
 871       <entry> Improve default container formatting </entry>
 872       <entry>
 873         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2585r1.html">
 874         P2585R1
 875         </link>
 876       </entry>
 877       <entry align="center"> </entry>
 878       <entry> <code>__cpp_lib_format_ranges &gt;= 202207L</code> </entry>
 879     </row>
 880
 881     <row>
 882       <entry> Formatted output </entry>
 883       <entry>
 884         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2093r14.html">
 885         P2093R14
 886         </link>
 887       </entry>
 888       <entry align="center"> 14.1 </entry>
 889       <entry> <code>__cpp_lib_print &gt;= 202207L</code> </entry>
 890     </row>
 891
 892     <row>
 893       <entry>
 894         Should the output of std::print to a terminal be synchronized with
 895         the underlying stream?
 896       </entry>
 897       <entry>
 898         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2539r3.html">
 899         P2539R3
 900         </link>
 901       </entry>
 902       <entry align="center"> 14.1 </entry>
 903       <entry/>
 904     </row>
 905
 906     <row>
 907       <entry>
 908         Formatting <code>thread::id</code> and <code>stacktrace</code>
 909       </entry>
 910       <entry>
 911         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2693r1.pdf">
 912         P2693R1
 913         </link>
 914       </entry>
 915       <entry align="center"> 14.1 </entry>
 916       <entry> <code>__cpp_lib_formatters &gt;= 202302L</code> </entry>
 917     </row>
 918
 919     <row>
 920       <entry>
 921         Add Constexpr Modifiers to Functions <code>to_chars</code> and
 922         <code>from_chars</code> for Integral Types in
 923         <code>&lt;charconv&gt;</code> Header
 924       </entry>
 925       <entry>
 926         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2291r3.pdf">
 927         P2291R3
 928         </link>
 929       </entry>
 930       <entry align="center"> 13.1 </entry>
 931       <entry> <code>__cpp_lib_constexpr_charconv &gt;= 202207L</code> </entry>
 932     </row>
 933
 934     <row>
 935       <entry namest="c1" nameend="c4" align="left">
 936         <emphasis role="bold">Miscellaneous</emphasis>
 937       </entry>
 938     </row>
 939
 940     <row>
 941       <entry> Inheriting from <code>std::variant</code> </entry>
 942       <entry>
 943         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2162r2.html">
 944         P2162R2
 945         </link>
 946       </entry>
 947       <entry align="center"> 11.3 </entry>
 948       <entry> <code>__cpp_lib_variant &gt;= 202102L</code> </entry>
 949     </row>
 950
 951     <row>
 952       <entry> Printing <code>volatile</code> Pointers </entry>
 953       <entry>
 954         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1147r1.html">
 955         P1147R1
 956         </link>
 957       </entry>
 958       <entry align="center"> 11.3 </entry>
 959       <entry/>
 960     </row>
 961
 962     <row>
 963       <entry> A Proposal to add stacktrace library </entry>
 964       <entry>
 965         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p0881r7.html">
 966         P0881R7
 967         </link>
 968       </entry>
 969       <entry align="center"> 12.1 </entry>
 970       <entry> <code>__cpp_lib_stacktrace &gt;= 202011L</code> </entry>
 971     </row>
 972
 973     <row>
 974       <entry> Add a pmr alias for std::stacktrace </entry>
 975       <entry>
 976         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2301r1.html">
 977         P2301R1
 978         </link>
 979       </entry>
 980       <entry align="center"> 12.1 </entry>
 981       <entry />
 982     </row>
 983
 984     <row>
 985       <entry> <code>std::expected</code> </entry>
 986       <entry>
 987         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p0323r12.html">
 988         P0323R12
 989         </link>
 990       </entry>
 991       <entry align="center"> 12.1 </entry>
 992       <entry> <code>__cpp_lib_expected &gt;= 202202L</code> </entry>
 993     </row>
 994
 995     <row>
 996       <entry> Monadic operations for std::expected </entry>
 997       <entry>
 998         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2505r5.html">
 999         P2505R5
1000         </link>
1001       </entry>
1002       <entry align="center"> 13.1 </entry>
1003       <entry> <code>__cpp_lib_expected &gt;= 202211L</code> </entry>
1004     </row>
1005
1006     <row>
1007       <entry> Monadic operations for std::optional </entry>
1008       <entry>
1009         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p0798r8.html">
1010         P0798R8
1011         </link>
1012       </entry>
1013       <entry align="center"> 12.1 </entry>
1014       <entry> <code>__cpp_lib_optional &gt;= 202110L</code> </entry>
1015     </row>
1016
1017     <row>
1018       <entry>
1019         Compatibility between <code>tuple</code>, <code>pair</code>
1020         and <emphasis>tuple-like</emphasis> objects </entry>
1021       <entry>
1022         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2165r4.pdf">
1023         P2165R4
1024         </link>
1025       </entry>
1026       <entry align="center"> 14.1 </entry>
1027       <entry> <code>__cpp_lib_tuple_like &gt;= 202207L</code> </entry>
1028     </row>
1029
1030     <row>
1031       <entry>
1032         Default Arguments for <code>pair</code>'s Forwarding Constructor
1033       </entry>
1034       <entry>
1035         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1951r1.html">
1036         P1951R1
1037         </link>
1038       </entry>
1039       <entry align="center"> 14.1 </entry>
1040       <entry/>
1041     </row>
1042
1043     <row>
1044       <entry> <code>move_only_function</code> </entry>
1045       <entry>
1046         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p0288r9.html">
1047         P0288R9
1048         </link>
1049       </entry>
1050       <entry align="center"> 12.1 </entry>
1051       <entry> <code>__cpp_lib_move_only_function &gt;= 202110L</code> </entry>
1052     </row>
1053
1054     <row>
1055       <entry> <code>invoke_r</code> </entry>
1056       <entry>
1057         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2136r3.html">
1058         P2136R3
1059         </link>
1060       </entry>
1061       <entry align="center"> 12.1 </entry>
1062       <entry> <code>__cpp_lib_invoke_r &gt;= 202106L</code> </entry>
1063     </row>
1064
1065     <row>
1066       <entry> Byteswapping for fun&amp;&amp;nuf </entry>
1067       <entry>
1068         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1272r4.html">
1069         P1272R4
1070         </link>
1071       </entry>
1072       <entry align="center"> 12.1 </entry>
1073       <entry> <code>__cpp_lib_byteswap &gt;= 202110L</code> </entry>
1074     </row>
1075
1076     <row>
1077       <entry> Function to mark unreachable code </entry>
1078       <entry>
1079         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p0627r6.pdf">
1080         P0627R6
1081         </link>
1082       </entry>
1083       <entry align="center"> 12.1 </entry>
1084       <entry> <code>__cpp_lib_unreachable &gt;= 202202L</code> </entry>
1085     </row>
1086
1087     <row>
1088       <entry> Add a conditional noexcept specification to std::exchange </entry>
1089       <entry>
1090         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2401r0.html">
1091         P2401R0
1092         </link>
1093       </entry>
1094       <entry align="center"> 12.1 </entry>
1095       <entry />
1096     </row>
1097
1098     <row>
1099       <entry> A more constexpr bitset </entry>
1100       <entry>
1101         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2417r2.pdf">
1102         P2417R2
1103         </link>
1104       </entry>
1105       <entry align="center"> 13.1 </entry>
1106       <entry> <code>__cpp_lib_constexpr_bitset &gt;= 202207L</code> </entry>
1107     </row>
1108
1109     <row>
1110       <entry> Extended floating-point types and standard names </entry>
1111       <entry>
1112         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p1467r9.html">
1113         P1467R9
1114         </link>
1115       </entry>
1116       <entry align="center"> 13.1 </entry>
1117       <entry/>
1118     </row>
1119
1120     <row>
1121       <entry> Support C atomics in C++ </entry>
1122       <entry>
1123         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p0943r6.html">
1124         P0943R6
1125         </link>
1126       </entry>
1127       <entry align="center"> 12.1 </entry>
1128       <entry> <code>__cpp_lib_stdatomic_h &gt;= 202011L</code> </entry>
1129     </row>
1130
1131     <row>
1132       <entry> Clarifying the status of the "C headers" </entry>
1133       <entry>
1134         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2340r1.html">
1135         P2340R1
1136         </link>
1137       </entry>
1138       <entry align="center"> Yes </entry>
1139       <entry />
1140     </row>
1141
1142     <row>
1143       <entry> Relax Requirements for time_point::clock </entry>
1144       <entry>
1145         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2020/p2212r2.html">
1146         P2212R2
1147         </link>
1148       </entry>
1149       <entry align="center"> Yes </entry>
1150       <entry />
1151     </row>
1152
1153     <row>
1154       <entry> Removing Garbage Collection Support </entry>
1155       <entry>
1156         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2186r2.html">
1157         P2186R2
1158         </link>
1159       </entry>
1160       <entry align="center"> 12.1 </entry>
1161       <entry />
1162     </row>
1163
1164     <row>
1165       <entry> Easy [utilities], [ranges], and [iterators] </entry>
1166       <entry>
1167         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p1642r11.html">
1168         P1642R11
1169         </link>
1170       </entry>
1171       <entry align="center"> 13.1 </entry>
1172       <entry />
1173     </row>
1174
1175     <row>
1176       <?dbhtml bgcolor="#C8B0B0" ?>
1177       <entry> Providing size feedback in the Allocator interface </entry>
1178       <entry>
1179         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p0401r6.html">
1180         P0401R6
1181         </link>
1182       </entry>
1183       <entry align="center"> </entry>
1184       <entry> <code>__cpp_lib_allocate_at_least &gt;= 202306L</code> </entry>
1185     </row>
1186
1187     <row>
1188       <?dbhtml bgcolor="#C8B0B0" ?>
1189       <entry>
1190         Disallow User Specialization of <code>allocator_traits</code>
1191       </entry>
1192       <entry>
1193         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2652r2.html">
1194         P2652R2
1195         </link>
1196       </entry>
1197       <entry align="center"> </entry>
1198       <entry/>
1199     </row>
1200
1201     <row>
1202       <?dbhtml bgcolor="#C8B0B0" ?>
1203       <entry> Explicit lifetime management </entry>
1204       <entry>
1205         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2590r2.pdf">
1206         P2590R2
1207         </link>
1208       </entry>
1209       <entry align="center"> </entry>
1210       <entry> <code>__cpp_lib_start_lifetime_as &gt;= 202207L</code> </entry>
1211     </row>
1212
1213     <row>
1214       <?dbhtml bgcolor="#C8B0B0" ?>
1215       <entry>
1216         Fixing <code>std::start_lifetime_as</code> and
1217         <code>std::start_lifetime_as_array</code>
1218       </entry>
1219       <entry>
1220         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2679r2.pdf">
1221         P2679R2
1222         </link>
1223       </entry>
1224       <entry align="center"> </entry>
1225       <entry/>
1226     </row>
1227
1228     <row>
1229       <entry> out_ptr - a scalable output pointer abstraction </entry>
1230       <entry>
1231         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1132r8.html">
1232         P1132R8
1233         </link>
1234       </entry>
1235       <entry align="center"> 14.1 </entry>
1236       <entry> <code>__cpp_lib_out_ptr &gt;= 202106L</code> </entry>
1237     </row>
1238
1239     <row>
1240       <?dbhtml bgcolor="#C8B0B0" ?>
1241       <entry> <code>barrier</code>'s phase completion guarantees </entry>
1242       <entry>
1243         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2588r3.html">
1244         P2588R3
1245         </link>
1246       </entry>
1247       <entry align="center"> </entry>
1248       <entry> <code>__cpp_lib_barrier &gt;= 202302L</code> </entry>
1249     </row>
1250
1251     <row>
1252       <?dbhtml bgcolor="#C8B0B0" ?>
1253       <entry>
1254         Standard Library Modules <code>std</code> and <code>std.compat</code>
1255       </entry>
1256       <entry>
1257         <link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2022/p2465r3.pdf">
1258         P2465R3
1259         </link>
1260       </entry>
1261       <entry align="center"> </entry>
1262       <entry> <code>__cpp_lib_modules &gt;= 202207L</code> </entry>
1263     </row>
1264
1265   </tbody>
1266 </tgroup>
1267 </table>
1268
1269 </section>