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| author | Corentin Jabot <corentinjabot@gmail.com> | 2023-05-16 08:52:25 +0200 |
|---|---|---|
| committer | Corentin Jabot <corentinjabot@gmail.com> | 2023-05-16 08:52:44 +0200 |
| commit | b9c0e590f1fd4ea37da5c2b9b78d8e715c885f56 (patch) | |
| tree | 835f672eaa60f52f4877e62d42e551afc49bfa0b /clang/www | |
| parent | 9ffef0f24de0fc05b946e662a7b233a32ad058e3 (diff) | |
| download | llvm-b9c0e590f1fd4ea37da5c2b9b78d8e715c885f56.tar.gz | |
[Clang][NFC] Present language version in descending publication date
Diffstat (limited to 'clang/www')
| -rwxr-xr-x | clang/www/cxx_status.html | 1732 |
1 files changed, 868 insertions, 864 deletions
diff --git a/clang/www/cxx_status.html b/clang/www/cxx_status.html index 564c3d6a8c48..91706be09f15 100755 --- a/clang/www/cxx_status.html +++ b/clang/www/cxx_status.html @@ -30,45 +30,45 @@ <p>Clang implements the following published and upcoming ISO C++ standards:</p> <table width="689" border="1" cellspacing="0"> + <tr> + <th>Language Standard</th> + <th>Flag</th> + <th>Available in Clang?</th> + </tr> + <tr> + <td><a href="#cxx26">C++2c</a></td> + <td><tt>-std=c++2c</tt></td> + <td class="partial" align="center">Partial</td> + </tr> <tr> - <th>Language Standard</th> - <th>Flag</th> - <th>Available in Clang?</th> -</tr> -<tr> - <td><a href="#cxx98">C++98 / C++03</a></td> - <td><tt>-std=c++98</tt></td> - <td class="full" align="center">Yes (other than <tt>export</tt>)</td> -</tr> -<tr> - <td><a href="#cxx11">C++11</a></td> - <td><tt>-std=c++11</tt></td> - <td class="full" align="center">Clang 3.3</td> -</tr> -<tr> - <td><a href="#cxx14">C++14</a></td> - <td><tt>-std=c++14</tt></td> - <td class="full" align="center">Clang 3.4</td> -</tr> -<tr> - <td><a href="#cxx17">C++17</a></td> - <td><tt>-std=c++17</tt></td> - <td class="full" align="center">Clang 5</td> -</tr> -<tr> - <td><a href="#cxx20">C++20</a></td> - <td><tt>-std=c++20</tt></td> - <td class="partial" align="center">Partial</td> -</tr> -<tr> - <td><a href="#cxx23">C++23</a></td> - <td><tt>-std=c++23</tt></td> - <td class="partial" align="center">Partial</td> -</tr> -<tr> - <td><a href="#cxx26">C++2c</a></td> - <td><tt>-std=c++2c</tt></td> - <td class="partial" align="center">Partial</td> + <td><a href="#cxx23">C++23</a></td> + <td><tt>-std=c++23</tt></td> + <td class="partial" align="center">Partial</td> + </tr> + <tr> + <td><a href="#cxx20">C++20</a></td> + <td><tt>-std=c++20</tt></td> + <td class="partial" align="center">Partial</td> + </tr> + <tr> + <td><a href="#cxx17">C++17</a></td> + <td><tt>-std=c++17</tt></td> + <td class="full" align="center">Clang 5</td> + </tr> + <tr> + <td><a href="#cxx14">C++14</a></td> + <td><tt>-std=c++14</tt></td> + <td class="full" align="center">Clang 3.4</td> + </tr> + <tr> + <td><a href="#cxx11">C++11</a></td> + <td><tt>-std=c++11</tt></td> + <td class="full" align="center">Clang 3.3</td> + </tr> + <tr> + <td><a href="#cxx98">C++98 / C++03</a></td> + <td><tt>-std=c++98</tt></td> + <td class="full" align="center">Yes (other than <tt>export</tt>)</td> </tr> </table> @@ -85,779 +85,301 @@ language.</p> the "c++" label, as well as mode-specific labels such as "c++11", "c++14", and so on, to track known bugs with Clang's language conformance.</p> -<h2 id="cxx98">C++98 implementation status</h2> - -<p>Clang implements all of the ISO C++ 1998 standard - (including the defects addressed in the ISO C++ 2003 standard) - except for <tt>export</tt> (which was removed in C++11). - -<h2 id="cxx11">C++11 implementation status</h2> +<h2 id="cxx26">C++2c implementation status</h2> -<p>Clang 3.3 and later implement all of the <a - href="https://www.iso.org/standard/50372.html">ISO - C++ 2011 standard</a>.</p> +<!-- TODO add link to the ISO Standard after it's published. --> +<p>Clang has support for some of the features of the C++ standard following +C++23, informally referred to as C++26.</p> -<p>You can use Clang in C++11 mode with the <code>-std=c++11</code> -option. Clang's C++11 mode can be used with -<a href="https://libcxx.llvm.org/">libc++</a> or with gcc's libstdc++.</p> +<p>You can use Clang in C++2c mode with the <code>-std=c++2c</code> option.</p> -<details> +<details open> <summary>List of features and minimum Clang version with support</summary> - <table width="689" border="1" cellspacing="0"> <tr> <th>Language Feature</th> - <th>C++11 Proposal</th> + <th>C++26 Proposal</th> <th>Available in Clang?</th> </tr> - <tr> - <td rowspan="2">Rvalue references</td> - <td><a href="https://wg21.link/n2118">N2118</a></td> - <td class="full" align="center">Clang 2.9</td> - <tr> <!-- from Kona 2019--> - <td><a href="https://wg21.link/p1825r0">P1825R0</a> (<a href="#dr">DR</a>)</td> - <td class="full" align="center">Clang 13</td> - </tr> - </tr> - <tr> - <td> Rvalue references for <code>*this</code></td> - <td><a href="https://wg21.link/n2439">N2439</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Initialization of class objects by rvalues</td> - <td><a href="https://wg21.link/n1610">N1610</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Non-static data member initializers</td> - <td><a href="https://wg21.link/n2756">N2756</a></td> - <td class="full" align="center">Clang 3.0</td> - </tr> - <tr> - <td>Variadic templates</td> - <td><a href="https://wg21.link/n2242">N2242</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td> Extending variadic template template parameters</td> - <td><a href="https://wg21.link/n2555">N2555</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td rowspan="3">Initializer lists</td> - <td><a href="https://wg21.link/n2672">N2672</a></td> - <td class="full" align="center">Clang 3.1</td> - </tr> - <tr> <!-- from Kona 2019--> - <td><a href="https://wg21.link/p1009r2">P1009R2</a> (<a href="#dr">DR</a>)</td> - <td class="full" align="center">Clang 9</td> - </tr> - <tr> <!-- from Prague--> - <td><a href="https://wg21.link/p1957r2">P1957R2</a> (<a href="#dr">DR</a>)</td> - <td class="full" align="center">Clang 11</td> - </tr> - <tr> - <td>Static assertions</td> - <td><a href="https://wg21.link/n1720">N1720</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td><code>auto</code>-typed variables</td> - <td><a href="https://wg21.link/n1984">N1984</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td> Multi-declarator <code>auto</code></td> - <td><a href="https://wg21.link/n1737">N1737</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td> Removal of auto as a storage-class specifier</td> - <td><a href="https://wg21.link/n2546">N2546</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td> New function declarator syntax</td> - <td><a href="https://wg21.link/n2541">N2541</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td rowspan="2">Lambda expressions</td> - <td><a href="https://wg21.link/n2927">N2927</a></td> - <td class="full" align="center">Clang 3.1</td> - </tr> - <tr> - <!-- from Albuquerque 2017 --> - <td><a href="https://wg21.link/p0588r1">P0588R1</a> (<a href="#dr">DR</a>)</td> - <td class="none" align="center">No</td> - </tr> - <tr> - <td>Declared type of an expression</td> - <td><a href="https://wg21.link/n2343">N2343</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td> Incomplete return types</td> - <td><a href="https://wg21.link/n3276">N3276</a></td> - <td class="full" align="center">Clang 3.1</td> - </tr> - <tr> - <td>Right angle brackets</td> - <td><a href="https://wg21.link/n1757">N1757</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Default template arguments for function templates</td> - <td><a href="https://wg21.link/cwg226">DR226</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Solving the SFINAE problem for expressions</td> - <td><a href="https://wg21.link/n2634">DR339</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Alias templates</td> - <td><a href="https://wg21.link/n2258">N2258</a></td> - <td class="full" align="center">Clang 3.0</td> - </tr> - <tr> - <td>Extern templates</td> - <td><a href="https://wg21.link/n1987">N1987</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Null pointer constant</td> - <td><a href="https://wg21.link/n2431">N2431</a></td> - <td class="full" align="center">Clang 3.0</td> - </tr> - <tr> - <td>Strongly-typed enums</td> - <td><a href="https://wg21.link/n2347">N2347</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Forward declarations for enums</td> - <td><a href="https://wg21.link/n2764">N2764</a> - <br><a href="https://wg21.link/cwg1206">DR1206</a></td> - <td class="full" align="center">Clang 3.1</td> - </tr> - <tr> - <td>Standardized attribute syntax</td> - <td><a href="https://wg21.link/n2761">N2761</a></td> - <td class="full" align="center">Clang 3.3 <a href="#n2761">(1)</a></td> - </tr> - <tr> - <td rowspan="2">Generalized constant expressions</td> - <td><a href="https://wg21.link/n2235">N2235</a></td> - <td class="full" align="center">Clang 3.1</td> - </tr> - <tr> - <!-- from Albuquerque 2017 --> - <td><a href="https://wg21.link/p0859r0">P0859R0</a> (<a href="#dr">DR</a>)</td> - <td class="full" align="center">Clang 8</td> - </tr> - <tr> - <td>Alignment support</td> - <td><a href="https://wg21.link/n2341">N2341</a></td> - <td class="full" align="center">Clang 3.3</td> - </tr> - <tr> - <td>Conditionally-support behavior</td> - <td><a href="https://wg21.link/n1627">N1627</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Changing undefined behavior into diagnosable errors</td> - <td><a href="https://wg21.link/n1727">N1727</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Delegating constructors</td> - <td><a href="https://wg21.link/n1986">N1986</a></td> - <td class="full" align="center">Clang 3.0</td> - </tr> - <tr> - <td rowspan="2">Inheriting constructors</td> - <td><a href="https://wg21.link/n2540">N2540</a></td> - <td class="full" align="center">Clang 3.3</td> - </tr> - <tr> - <!-- from Kona 2015 --> - <td><a href="https://wg21.link/p0136r1">P0136R1</a> (<a href="#dr">DR</a>)</td> - <td class="full" align="center">Clang 3.9</td> - </tr> - <tr> - <td>Explicit conversion operators</td> - <td><a href="https://wg21.link/n2437">N2437</a></td> - <td class="full" align="center">Clang 3.0</td> - </tr> - <tr> - <td>New character types</td> - <td><a href="https://wg21.link/n2249">N2249</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Unicode string literals</td> - <td><a href="https://wg21.link/n2442">N2442</a></td> - <td class="full" align="center">Clang 3.0</td> - </tr> - <tr> - <td>Raw string literals</td> - <td><a href="https://wg21.link/n2442">N2442</a></td> - <td class="full" align="center">Clang 3.0</td> - </tr> - <tr> - <td>Universal character names in literals</td> - <td><a href="https://wg21.link/n2170">N2170</a></td> - <td class="full" align="center">Clang 3.1</td> - </tr> - <tr> - <td>User-defined literals</td> - <td><a href="https://wg21.link/n2765">N2765</a></td> - <td class="full" align="center">Clang 3.1</td> - </tr> - <tr> - <td>Standard Layout Types</td> - <td><a href="https://wg21.link/n2342">N2342</a></td> - <td class="full" align="center">Clang 3.0</td> - </tr> - <tr> - <td rowspan="2">Defaulted functions</td> - <td><a href="https://wg21.link/n2346">N2346</a></td> - <td class="full" align="center">Clang 3.0</td> - </tr> - <tr> <!-- from Kona 2019--> - <td><a href="https://wg21.link/p1286r2">P1286R2</a> (<a href="#dr">DR</a>)</td> - <td class="full" align="center">Clang 9</td> - </tr> - <tr> - <td>Deleted functions</td> - <td><a href="https://wg21.link/n2346">N2346</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Extended friend declarations</td> - <td><a href="https://wg21.link/n1791">N1791</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Extending <code>sizeof</code></td> - <td><a href="https://wg21.link/n2253">N2253</a> - <br><a href="https://wg21.link/cwg850">DR850</a></td> - <td class="full" align="center">Clang 3.1</td> - </tr> - <tr> - <td>Inline namespaces</td> - <td><a href="https://wg21.link/n2535">N2535</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Unrestricted unions</td> - <td><a href="https://wg21.link/n2544">N2544</a></td> - <td class="full" align="center">Clang 3.1</td> - </tr> - <tr> - <td>Local and unnamed types as template arguments</td> - <td><a href="https://wg21.link/n2657">N2657</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td rowspan="2">Range-based for</td> - <td><a href="https://wg21.link/n2930">N2930</a></td> - <td class="full" align="center">Clang 3.0</td> - </tr> - <tr> - <!-- from Jacksonville 2018 --> - <td><a href="https://wg21.link/p0962r1">P0962R1</a> (<a href="#dr">DR</a>)</td> - <td class="full" align="center">Clang 8</td> - </tr> - <tr> - <td>Explicit virtual overrides</td> - <td><a href="https://wg21.link/n2928">N2928</a> - <br><a href="https://wg21.link/n3206">N3206</a> - <br><a href="https://wg21.link/n3272">N3272</a></td> - <td class="full" align="center">Clang 3.0</td> - </tr> - <tr> - <td>Minimal support for garbage collection and reachability-based leak detection</td> - <td><a href="https://wg21.link/n2670">N2670</a></td> - <td class="na" align="center">N/A <a href="#n2670">(2)</a></td> - </tr> - <tr> - <td>Allowing move constructors to throw [noexcept]</td> - <td><a href="https://wg21.link/n3050">N3050</a></td> - <td class="full" align="center">Clang 3.0</td> - </tr> - <tr> - <td>Defining move special member functions</td> - <td><a href="https://wg21.link/n3053">N3053</a></td> - <td class="full" align="center">Clang 3.0</td> - </tr> - - <tr class="separator"> - <th align="center" colspan="3">Concurrency</th> - </tr> - <tr> - <td>Sequence points</td> - <td><a href="https://wg21.link/n2239">N2239</a></td> - <td class="full" align="center">Clang 3.3</td> - </tr> - <tr> - <td>Atomic operations</td> - <td><a href="https://wg21.link/n2427">N2427</a></td> - <td class="full" align="center">Clang 3.1</td> - </tr> - <tr> - <td>Strong Compare and Exchange</td> - <td><a href="https://wg21.link/n2748">N2748</a></td> - <td class="full" align="center">Clang 3.1 <a href="#n2748">(3)</a></td> - </tr> - <tr> - <td>Bidirectional Fences</td> - <td><a href="https://wg21.link/n2752">N2752</a></td> - <td class="full" align="center">Clang 3.1</td> - </tr> - - <tr> - <td>Memory model</td> - <td><a href="https://wg21.link/n2429">N2429</a></td> - <td class="full" align="center">Clang 3.2</td> - </tr> - <tr> - <td>Data-dependency ordering: atomics and memory model</td> - <td><a href="https://wg21.link/n2664">N2664</a></td> - <td class="full" align="center">Clang 3.2 <a href="#n2664">(4)</a></td> - </tr> - <tr> - <td>Propagating exceptions</td> - <td><a href="https://wg21.link/n2179">N2179</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Allow atomics use in signal handlers</td> - <td><a href="https://wg21.link/n2547">N2547</a></td> - <td class="full" align="center">Clang 3.1</td> - </tr> - <tr> - <td>Thread-local storage</td> - <td><a href="https://wg21.link/n2659">N2659</a></td> - <td class="full" align="center">Clang 3.3 <a href="#n2659">(5)</a></td> - </tr> - <tr> - <td>Dynamic initialization and destruction with concurrency</td> - <td><a href="https://wg21.link/n2660">N2660</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - - <tr class="separator"> - <th align="center" colspan="3">C99 Features in C++11</th> - </tr> - <tr> - <td><code>__func__</code> predefined identifier</td> - <td><a href="https://wg21.link/n2340">N2340</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>C99 preprocessor</td> - <td><a href="https://wg21.link/n1653">N1653</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td><code>long long</code></td> - <td><a href="https://wg21.link/n1811">N1811</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>Extended integral types</td> - <td><a href="https://wg21.link/n1988">N1988</a></td> - <td class="na" align="center">N/A <a href="#n1988">(6)</a></td> - </tr> </table> - -<p> -<span id="n2761">(1): The <code>[[carries_dependency]]</code> attribute -has no effect.</span><br> -<span id="n2670">(2): No compiler changes are required for an implementation -such as Clang that does not provide garbage collection.</span><br> -<span id="n2748">(3): All compare-exchange operations are emitted as -strong compare-exchanges.</span><br> -<span id="n2664">(4): <code>memory_order_consume</code> is lowered to -<code>memory_order_acquire</code>.</span><br> -<span id="n2659">(5): <code>thread_local</code> support -requires a C++ runtime library providing <code>__cxa_thread_atexit</code>, such -as <a href="https://libcxxabi.llvm.org">libc++abi</a> 3.6 or later, -or libsupc++ 4.8 or later.</span><br> -<span id="n1988">(6): No compiler changes are required for an implementation -such as Clang that does not provide any extended integer types. -<code>__int128</code> is not treated as an extended integer type, -because changing <code>intmax_t</code> would be an ABI-incompatible -change.</span> -</p> </details> -<h2 id="cxx14">C++14 implementation status</h2> -<p>Clang 3.4 and later implement all of the <a - href="https://www.iso.org/standard/64029.html">ISO - C++ 2014 standard</a>.</p> +<h2 id="cxx23">C++23 implementation status</h2> -<p>You can use Clang in C++14 mode with the <code>-std=c++14</code> option -(use <code>-std=c++1y</code> in Clang 3.4 and earlier).</p> +<!-- TODO add link to the ISO Standard after it's published. --> +<p>Clang has support for some of the features of the ISO C++ 2023 standard.</p> -<details> +<p>You can use Clang in C++23 mode with the <code>-std=c++23</code> option.</p> + +<details open> <summary>List of features and minimum Clang version with support</summary> <table width="689" border="1" cellspacing="0"> <tr> <th>Language Feature</th> - <th>C++14 Proposal</th> + <th>C++23 Proposal</th> <th>Available in Clang?</th> </tr> + <!-- Fall 2020 papers --> <tr> - <td>Tweak to certain C++ contextual conversions</td> - <td><a href="https://wg21.link/n3323">N3323</a></td> - <td class="full" align="center">Clang 3.4</td> - </tr> - <tr> - <td>Binary literals</td> - <td><a href="https://wg21.link/n3472">N3472</a></td> - <td class="full" align="center">Clang 2.9</td> - </tr> - <tr> - <td>decltype(auto)</td> - <td rowspan=2 style="vertical-align:middle"><a href="https://wg21.link/n3638">N3638</a></td> - <td class="full" align="center">Clang 3.3</td> + <td>Literal suffix <tt>uz</tt>, <tt>z</tt> for <tt>size_t</tt>, <tt>ssize_t</tt></td> + <td><a href="https://wg21.link/p0330r8">P0330R8</a></td> + <td class="full" align="center">Clang 13</td> </tr> + <!-- Spring 2021 papers --> <tr> - <td>Return type deduction for normal functions</td> - <td class="full" align="center">Clang 3.4</td> + <td>Make <tt>()</tt> in lambdas optional in all cases</td> + <td><a href="https://wg21.link/p1102r2">P1102R2</a></td> + <td class="full" align="center">Clang 13</td> </tr> <tr> - <td>Initialized lambda captures</td> - <td><a href="https://wg21.link/n3648">N3648</a></td> - <td class="full" align="center">Clang 3.4</td> + <td>Simpler implicit move</td> + <td><a href="https://wg21.link/p2266r1">P2266R1</a></td> + <td class="full" align="center">Clang 13</td> </tr> <tr> - <td>Generic lambdas</td> - <td><a href="https://wg21.link/n3649">N3649</a></td> - <td class="full" align="center">Clang 3.4</td> + <td><tt>if consteval</tt></td> + <td><a href="https://wg21.link/P1938R3">P1938R3</a></td> + <td class="full" align="center">Clang 14</td> </tr> <tr> - <td>Variable templates</td> - <td><a href="https://wg21.link/n3651">N3651</a></td> - <td class="full" align="center">Clang 3.4</td> + <td>Allow duplicate attributes</td> + <td><a href="https://wg21.link/P2156R1">P2156R1</a></td> + <td class="full" align="center">Clang 13</td> </tr> <tr> - <td>Relaxing requirements on constexpr functions</td> - <td><a href="https://wg21.link/n3652">N3652</a></td> - <td class="full" align="center">Clang 3.4</td> + <td>Narrowing contextual conversions to bool</td> + <td><a href="https://wg21.link/P1401R5">P1401R5</a></td> + <td class="full" align="center">Clang 14</td> </tr> <tr> - <td>Member initializers and aggregates</td> - <td><a href="https://wg21.link/n3653">N3653</a></td> - <td class="full" align="center">Clang 3.3</td> + <td>Trimming whitespaces before line splicing</td> + <td><a href="https://wg21.link/P2223R2">P2223R2</a></td> + <td class="full" align="center">Yes</td> </tr> <tr> - <td>Clarifying memory allocation</td> - <td><a href="https://wg21.link/n3664">N3664</a></td> - <td class="full" align="center">Clang 3.4</td> + <td>Make declaration order layout mandated</td> + <td><a href="https://wg21.link/p1847r4">P1874R4</a></td> + <td class="full" align="center">Yes</td> </tr> <tr> - <td><tt>[[deprecated]]</tt> attribute</td> - <td><a href="https://wg21.link/n3760">N3760</a></td> - <td class="full" align="center">Clang 3.4</td> + <td>C++ identifier syntax using UAX 31</td> + <td><a href="https://wg21.link/P1949R7">P1949R7</a></td> + <td class="full" align="center">Clang 14</td> </tr> <tr> - <td>Single quotation mark as digit separator</td> - <td><a href="https://wg21.link/n3781">N3781</a></td> - <td class="full" align="center">Clang 3.4</td> + <td>Mixed string literal concatenation</td> + <td><a href="https://wg21.link/p2201r1">P2201R1</a></td> + <td class="full" align="center">Yes</td> </tr> + <!-- October 2021 papers --> <tr> - <td>C++ Sized Deallocation</td> - <td><a href="https://wg21.link/n3778">N3778</a></td> - <td class="full" align="center">Clang 3.4 <a href="#n3778">(7)</a></td> + <td rowspan=2>Deducing this</td> + <td><a href="https://wg21.link/P0847R7">P0847R7</a></td> + <td class="none" align="center">No</td> </tr> -</table> - -<p> -<span id="n3778">(7): In Clang 3.7 and later, sized deallocation is only enabled -if the user passes the <code>-fsized-deallocation</code> flag. The user must -supply definitions of the sized deallocation functions, either by providing them -explicitly or by using a C++ standard library that does. <code>libstdc++</code> -added these functions in version 5.0, and <code>libc++</code> added them in -version 3.7. -</span> -</p> -</details> - -<h2 id="cxx17">C++17 implementation status</h2> - -<p>Clang 5 and later implement all the features of the -<a href="https://www.iso.org/standard/68564.html">ISO C++ 2017 standard</a>.</p> - -<p>By default, Clang 16 or later builds C++ code according to the C++17 standard. -You can use Clang in C++17 mode with the <code>-std=c++17</code> option -(use <code>-std=c++1z</code> in Clang 4 and earlier).</p> - -<details open> -<summary>List of features and minimum Clang version with support</summary> - -<table width="689" border="1" cellspacing="0"> - <tr> - <th>Language Feature</th> - <th>C++17 Proposal</th> - <th>Available in Clang?</th> - </tr> - <!-- Issaquah 2014 papers --> <tr> - <td><tt>static_assert</tt> with no message</td> - <td><a href="https://wg21.link/n3928">N3928</a></td> - <td class="full" align="center">Clang 3.5</td> + <td><a href="https://wg21.link/P2797R0">P2797R0</a></td> + <td class="none" align="center">No</td> </tr> - <!-- Rapperswil papers --> <tr> - <td>Disabling trigraph expansion by default</td> - <td><a href="https://wg21.link/n4086">N4086</a></td> - <td class="full" align="center">Clang 3.5</td> + <td rowspan=2>Change scope of lambda trailing-return-type</td> + <td><a href="https://wg21.link/P2036R3">P2036R3</a></td> + <td rowspan=2 class="unreleased" align="center">Clang 17</td> </tr> <tr> - <td><tt>typename</tt> in a template template parameter</td> - <td><a href="https://wg21.link/n4051">N4051</a></td> - <td class="full" align="center">Clang 3.5</td> + <td><a href="https://wg21.link/P2579R0">P2579R0</a></td> </tr> <tr> - <td>New <tt>auto</tt> rules for direct-list-initialization - <td><a href="https://wg21.link/n3922">N3922</a></td> - <td class="full" align="center">Clang 3.8 <a href="#n3922">(8)</a></td> + <td>Multidimensional subscript operator</td> + <td><a href="https://wg21.link/P2128R6">P2128R6</a></td> + <td class="full" align="center">Clang 15</td> </tr> - <!-- Urbana papers --> <tr> - <td rowspan="2">Fold expressions</td> - <td><a href="https://wg21.link/n4295">N4295</a></td> - <td class="full" align="center">Clang 3.6</td> + <td>Non-literal variables (and labels and gotos) in constexpr functions</td> + <td><a href="https://wg21.link/P2242R3">P2242R3</a></td> + <td class="full" align="center">Clang 15</td> </tr> - <tr> <!-- from Jacksonville --> - <td><a href="https://wg21.link/p0036r0">P0036R0</a></td> - <td class="full" align="center">Clang 3.9</td> - </tr> <tr> - <td><tt>u8</tt> character literals</td> - <td><a href="https://wg21.link/n4267">N4267</a></td> - <td class="full" align="center">Clang 3.6</td> + <td>Character encoding of diagnostic text</td> + <td><a href="https://wg21.link/P2246R1">P2246R1</a></td> + <td class="full" align="center">Yes</td> </tr> <tr> - <td>Nested namespace definition</td> - <td><a href="https://wg21.link/n4230">N4230</a></td> - <td class="full" align="center">Clang 3.6</td> + <td>Character sets and encodings</td> + <td><a href="https://wg21.link/P2314R4">P2314R4</a></td> + <td class="full" align="center">Yes</td> </tr> <tr> - <td>Attributes for namespaces and enumerators</td> - <td><a href="https://wg21.link/n4266">N4266</a></td> - <td class="full" align="center">Clang 3.6</td> + <td>Consistent character literal encoding</td> + <td><a href="https://wg21.link/P2316R2">P2316R2</a></td> + <td class="full" align="center">Yes</td> </tr> <tr> - <td>Allow constant evaluation for all non-type template arguments</td> - <td><a href="https://wg21.link/n4268">N4268</a></td> - <td class="full" align="center">Clang 3.6</td> + <td>Add support for preprocessing directives elifdef and elifndef</td> + <td><a href="https://wg21.link/P2334R1">P2334R1</a></td> + <td class="full" align="center">Clang 13</td> </tr> - <!-- Kona papers --> <tr> - <td>Remove deprecated <tt>register</tt> storage class</td> - <td><a href="https://wg21.link/p0001r1">P0001R1</a></td> - <td class="full" align="center">Clang 3.8</td> + <td>Extend init-statement to allow alias-declaration</td> + <td><a href="https://wg21.link/P2360R0">P2360R0</a></td> + <td class="full" align="center">Clang 14</td> </tr> <tr> - <td>Remove deprecated <tt>bool</tt> increment</td> - <td><a href="https://wg21.link/p0002r1">P0002R1</a></td> - <td class="full" align="center">Clang 3.8</td> + <td>auto(x): decay-copy in the language</td> + <td><a href="https://wg21.link/P0849R8">P0849R8</a></td> + <td class="full" align="center">Clang 15</td> </tr> + <!-- February 2022 papers --> <tr> - <td>Make exception specifications part of the type system</td> - <td><a href="https://wg21.link/p0012r1">P0012R1</a></td> - <td class="full" align="center">Clang 4</td> + <td>Attributes on Lambda-Expressions</td> + <td><a href="https://wg21.link/P2173R1">P2173R1</a></td> + <td class="full" align="center">Clang 13</td> </tr> <tr> - <td><tt>__has_include</tt> in preprocessor conditionals</td> - <td><a href="https://wg21.link/p0061r1">P0061R1</a></td> - <td class="full" align="center">Yes</td> + <td><tt>constexpr</tt> for <tt><cmath></tt> and <tt><cstdlib></tt></td> + <td><a href="https://wg21.link/P0533R9">P0533R9</a></td> + <td class="none" align="center">No</td> </tr> - <!-- Jacksonville papers --> <tr> - <td><tt>[[fallthrough]]</tt> attribute</td> - <td><a href="https://wg21.link/p0188r1">P0188R1</a></td> - <td class="full" align="center">Clang 3.9</td> + <td>Type trait to determine if a reference binds to a temporary</td> + <td><a href="https://wg21.link/P2255R2">P2255R2</a></td> + <td class="partial" align="center"> + <details><summary>Partial</summary> + Clang provides a <tt>__reference_binds_to_temporary</tt> type trait + builtin, with which the library facility can be partially implemented. + Both <tt>__reference_constructs_from_temporary</tt> and + <tt>__reference_converts_from_temporary</tt> builtins should be + provided, following the normal cross-vendor convention to implement + traits requiring compiler support directly. + </details></td> + </td> </tr> + <!-- July 2022 papers --> <tr> - <td rowspan="2"><tt>[[nodiscard]]</tt> attribute</td> - <td><a href="https://wg21.link/p0189r1">P0189R1</a></td> - <td class="full" align="center">Clang 3.9</td> + <td>The Equality Operator You Are Looking For</td> + <td><a href="https://wg21.link/P2468R2">P2468R2</a></td> + <td class="full" align="center">Clang 16</td> </tr> - <tr> <!-- from Cologne 2019 --> - <td><a href="https://wg21.link/p1771r1">P1771R1</a> (<a href="#dr">DR</a>)</td> - <td class="full" align="center">Clang 9</td> - </tr> <tr> - <td><tt>[[maybe_unused]]</tt> attribute</td> - <td><a href="https://wg21.link/p0212r1">P0212R1</a></td> - <td class="full" align="center">Clang 3.9</td> + <td>De-deprecating volatile compound operations</td> + <td><a href="https://wg21.link/P2327R1">P2327R1</a></td> + <td class="full" align="center">Clang 15</td> </tr> <tr> - <td>Aggregate initialization of classes with base classes</td> - <td><a href="https://wg21.link/p0017r1">P0017R1</a></td> - <td class="full" align="center">Clang 3.9</td> + <td>Support for <code>#warning</code></td> + <td><a href="https://wg21.link/P2437R1">P2437R1</a></td> + <td class="full" align="center">Yes</td> </tr> <tr> - <td><tt>constexpr</tt> lambda expressions</td> - <td><a href="https://wg21.link/p0170r1">P0170R1</a></td> - <td class="full" align="center">Clang 5</td> + <td>Remove non-encodable wide character literals and multicharacter wide character literals</td> + <td><a href="https://wg21.link/P2362R3">P2362R3</a></td> + <td class="full" align="center">Clang 14</td> </tr> <tr> - <td>Differing <tt>begin</tt> and <tt>end</tt> types in range-based <tt>for</tt></td> - <td><a href="https://wg21.link/p0184r0">P0184R0</a></td> - <td class="full" align="center">Clang 3.9</td> + <td>Labels at the end of compound statements</td> + <td><a href="https://wg21.link/P2324R2">P2324R2</a></td> + <td class="full" align="center">Clang 16</td> </tr> <tr> - <td>Lambda capture of <tt>*this</tt></td> - <td><a href="https://wg21.link/p0018r3">P0018R3</a></td> - <td class="full" align="center">Clang 3.9</td> + <td>Delimited escape sequences</td> + <td><a href="https://wg21.link/P2290R3">P2290R3</a></td> + <td class="full" align="center">Clang 15</td> </tr> <tr> - <td>Direct-list-initialization of <tt>enum</tt>s</td> - <td><a href="https://wg21.link/p0138r2">P0138R2</a></td> - <td class="full" align="center">Clang 3.9</td> + <td>Named universal character escapes</td> + <td><a href="https://wg21.link/P2071R2">P2071R2</a></td> + <td class="full" align="center">Clang 15</td> </tr> <tr> - <td>Hexadecimal floating-point literals</td> - <td><a href="https://wg21.link/p0245r1">P0245R1</a></td> - <td class="full" align="center">Yes</td> + <td>Relaxing some constexpr restrictions</td> + <td><a href="https://wg21.link/P2448R2">P2448R2</a></td> + <td class="partial" align="center"> + <details><summary>Clang 17 (Partial)</summary> + We do not support outside of defaulted special memeber functions the change that constexpr functions no + longer have to be constexpr compatible but rather support a less restricted requirements for constexpr + functions. Which include allowing non-literal types as return values and parameters, allow calling of + non-constexpr functions and constructors. + </details></td> + </td> </tr> - <!-- Oulu papers --> <tr> - <td>Using attribute namespaces without repetition</td> - <td><a href="https://wg21.link/p0028r4">P0028R4</a></td> - <td class="full" align="center">Clang 3.9</td> + <td>Using unknown pointers and references in constant expressions</td> + <td><a href="https://wg21.link/P2280R4">P2280R4</a></td> + <td class="none" align="center">No</td> </tr> <tr> - <td>Dynamic memory allocation for over-aligned data</td> - <td><a href="https://wg21.link/p0035r4">P0035R4</a></td> - <td class="full" align="center">Clang 4</td> + <td>static <code>operator()</code></td> + <td><a href="https://wg21.link/P1169R4">P1169R4</a></td> + <td class="full" align="center">Clang 16</td> </tr> <tr> - <td rowspan="4">Template argument deduction for class templates</td> - <td><a href="https://wg21.link/p0091r3">P0091R3</a></td> - <td rowspan="2" class="full" align="center">Clang 5</td> + <td>Extended floating-point types and standard names</td> + <td><a href="https://wg21.link/P1467R9">P1467R9</a></td> + <td class="none" align="center">No</td> </tr> - <tr> <!-- from Issaquah --> - <td><a href="https://wg21.link/p0512r0">P0512R0</a></td> - </tr> - <tr> - <!-- from Kona 2017 --> - <td><a href="https://wg21.link/p0620r1">P0620R0</a> (<a href="#dr">DR</a>)</td> - <td class="full" align="center">Clang 7</td> - </tr> - <tr> - <!-- from Toronto 2017 --> - <td><a href="https://wg21.link/p0702r1">P0702R1</a> (<a href="#dr">DR</a>)</td> - <td class="full" align="center">Clang 6</td> - </tr> <tr> - <td>Non-type template parameters with <tt>auto</tt> type</td> - <td><a href="https://wg21.link/p0127r2">P0127R2</a></td> - <td class="full" align="center">Clang 4</td> + <td>Class template argument deduction from inherited constructors</td> + <td><a href="https://wg21.link/P2582R1">P2582R1</a></td> + <td class="none" align="center">No</td> </tr> <tr> - <td>Guaranteed copy elision</td> - <td><a href="https://wg21.link/p0135r1">P0135R1</a></td> - <td class="full" align="center">Clang 4</td> + <td>Portable assumptions</td> + <td><a href="https://wg21.link/P1774R8">P1774R8</a></td> + <td class="none" align="center">No</td> </tr> <tr> - <td rowspan=2>Stricter expression evaluation order</td> - <td><a href="https://wg21.link/p0145r3">P0145R3</a></td> - <td class="full" align="center" rowspan=2>Clang 4 <a href="#p0145">(9)</a></td> + <td>Support for UTF-8 as a portable source file encoding</td> + <td><a href="https://wg21.link/P2295R6">P2295R6</a></td> + <td class="full" align="center">Clang 15</td> </tr> <tr> - <td><a href="https://wg21.link/p0400r0">P0400R0</a></td> + <td><code>char8_t</code> Compatibility and Portability Fix</td> + <td><a href="https://wg21.link/P2513R3">P2513R3</a></td> + <td class="full" align="center">Clang 16</td> </tr> <tr> - <td>Requirement to ignore unknown attributes</td> - <td><a href="https://wg21.link/p0283r2">P0283R2</a></td> + <td>Relax requirements on <code>wchar_t</code> to match existing practices</td> + <td><a href="https://wg21.link/P2460R2">P2460R2</a></td> <td class="full" align="center">Yes</td> </tr> <tr> - <td><tt>constexpr</tt> <em>if-statement</em>s</td> - <td><a href="https://wg21.link/p0292r2">P0292R2</a></td> - <td class="full" align="center">Clang 3.9</td> - </tr> - <tr> - <td>Inline variables</td> - <td><a href="https://wg21.link/p0386r2">P0386R2</a></td> - <td class="full" align="center">Clang 3.9</td> + <td>Explicit lifetime management</td> + <td><a href="https://wg21.link/P2590R2">P2590R2</a></td> + <td class="none" align="center">No</td> </tr> + <!-- November 2022 (Kona) papers --> <tr> - <td rowspan="3">Structured bindings</td> - <td><a href="https://wg21.link/p0217r3">P0217R3</a></td> - <td class="full" align="center">Clang 4</td> + <td>static <code>operator[]</code></td> + <td><a href="https://wg21.link/P2589R1">P2589R1</a></td> + <td class="full" align="center">Clang 16</td> </tr> - <tr> - <!-- from Jacksonville 2018 --> - <td><a href="https://wg21.link/p0961r1">P0961R1</a> (<a href="#dr">DR</a>)</td> - <td class="full" align="center">Clang 8</td> - </tr> - <tr> - <!-- from Jacksonville 2018 --> - <td><a href="https://wg21.link/p0969r0">P0969R0</a> (<a href="#dr">DR</a>)</td> - <td class="full" align="center">Clang 8</td> - </tr> <tr> - <td>Separate variable and condition for <tt>if</tt> and <tt>switch</tt></td> - <td><a href="https://wg21.link/p0305r1">P0305R1</a></td> - <td class="full" align="center">Clang 3.9</td> + <td>Permitting static constexpr variables in constexpr functions</td> + <td><a href="https://wg21.link/P2647R1">P2647R1</a></td> + <td class="full" align="center">Clang 16</td> </tr> - <!-- Issaquah 2016 papers --> <tr> - <td>Matching template template parameters to compatible arguments</td> - <td><a href="https://wg21.link/p0522r0">P0522R0</a></td> - <td class="partial" align="center">Partial <a href="#p0522">(10)</a></td> + <td>consteval needs to propagate up</td> + <td><a href="https://wg21.link/P2564R3">P2564R3</a> (<a href="#dr">DR</a>)</td> + <td class="none" align="center">No</td> </tr> <tr> - <td>Removing deprecated dynamic exception specifications</td> - <td><a href="https://wg21.link/p0003r5">P0003R5</a></td> - <td class="full" align="center">Clang 4</td> + <td>Lifetime extension in range-based for loops</td> + <td><a href="https://wg21.link/P2718R0">P2718R0</a></td> + <td class="none" align="center">No</td> </tr> + <!--Issaquah 2023 papers--> <tr> - <td>Pack expansions in <em>using-declarations</em></td> - <td><a href="https://wg21.link/p0195r2">P0195R2</a></td> - <td class="full" align="center">Clang 4</td> + <td>Referencing The Unicode Standard</td> + <td><a href="https://wg21.link/P2736R2">P2736R2</a></td> + <td class="full" align="center">Yes</td> </tr> </table> - -<p> -<span id="n3922">(8): This is a backwards-incompatible change that is applied to -all language versions that allow type deduction from <tt>auto</tt> -(per the request of the C++ committee). -In Clang 3.7, a warning is emitted for all cases that would change meaning. -</span><br> -<span id="p0145">(9): Under the MS ABI, function parameters are destroyed from -left to right in the callee. As a result, function parameters in calls to -<tt>operator<<</tt>, <tt>operator>></tt>, <tt>operator->*</tt>, -<tt>operator&&</tt>, <tt>operator||</tt>, and <tt>operator,</tt> -functions using expression syntax are no longer guaranteed to be destroyed in -reverse construction order in that ABI. -This is not fully supported during constant expression evaluation until Clang 12. -</span><br> -<span id="p0522">(10): Despite being the resolution to a Defect Report, this -feature is disabled by default in all language versions, and can be enabled -explicitly with the flag <tt>-frelaxed-template-template-args</tt> in Clang 4 -onwards. -The change to the standard lacks a corresponding change for template partial -ordering, resulting in ambiguity errors for reasonable and previously-valid -code. This issue is expected to be rectified soon. -</span> -</p> </details> + <h2 id="cxx20">C++20 implementation status</h2> <p>Clang has support for some of the features of the @@ -1291,12 +813,15 @@ code. This issue is expected to be rectified soon. </p> </details> -<h2 id="cxx23">C++23 implementation status</h2> -<!-- TODO add link to the ISO Standard after it's published. --> -<p>Clang has support for some of the features of the ISO C++ 2023 standard.</p> +<h2 id="cxx17">C++17 implementation status</h2> -<p>You can use Clang in C++23 mode with the <code>-std=c++23</code> option.</p> +<p>Clang 5 and later implement all the features of the +<a href="https://www.iso.org/standard/68564.html">ISO C++ 2017 standard</a>.</p> + +<p>By default, Clang 16 or later builds C++ code according to the C++17 standard. +You can use Clang in C++17 mode with the <code>-std=c++17</code> option +(use <code>-std=c++1z</code> in Clang 4 and earlier).</p> <details open> <summary>List of features and minimum Clang version with support</summary> @@ -1304,285 +829,764 @@ code. This issue is expected to be rectified soon. <table width="689" border="1" cellspacing="0"> <tr> <th>Language Feature</th> - <th>C++23 Proposal</th> + <th>C++17 Proposal</th> <th>Available in Clang?</th> </tr> - <!-- Fall 2020 papers --> + <!-- Issaquah 2014 papers --> <tr> - <td>Literal suffix <tt>uz</tt>, <tt>z</tt> for <tt>size_t</tt>, <tt>ssize_t</tt></td> - <td><a href="https://wg21.link/p0330r8">P0330R8</a></td> - <td class="full" align="center">Clang 13</td> + <td><tt>static_assert</tt> with no message</td> + <td><a href="https://wg21.link/n3928">N3928</a></td> + <td class="full" align="center">Clang 3.5</td> </tr> - <!-- Spring 2021 papers --> + <!-- Rapperswil papers --> <tr> - <td>Make <tt>()</tt> in lambdas optional in all cases</td> - <td><a href="https://wg21.link/p1102r2">P1102R2</a></td> - <td class="full" align="center">Clang 13</td> + <td>Disabling trigraph expansion by default</td> + <td><a href="https://wg21.link/n4086">N4086</a></td> + <td class="full" align="center">Clang 3.5</td> </tr> <tr> - <td>Simpler implicit move</td> - <td><a href="https://wg21.link/p2266r1">P2266R1</a></td> - <td class="full" align="center">Clang 13</td> + <td><tt>typename</tt> in a template template parameter</td> + <td><a href="https://wg21.link/n4051">N4051</a></td> + <td class="full" align="center">Clang 3.5</td> </tr> <tr> - <td><tt>if consteval</tt></td> - <td><a href="https://wg21.link/P1938R3">P1938R3</a></td> - <td class="full" align="center">Clang 14</td> + <td>New <tt>auto</tt> rules for direct-list-initialization + <td><a href="https://wg21.link/n3922">N3922</a></td> + <td class="full" align="center">Clang 3.8 <a href="#n3922">(8)</a></td> </tr> + <!-- Urbana papers --> <tr> - <td>Allow duplicate attributes</td> - <td><a href="https://wg21.link/P2156R1">P2156R1</a></td> - <td class="full" align="center">Clang 13</td> + <td rowspan="2">Fold expressions</td> + <td><a href="https://wg21.link/n4295">N4295</a></td> + <td class="full" align="center">Clang 3.6</td> </tr> + <tr> <!-- from Jacksonville --> + <td><a href="https://wg21.link/p0036r0">P0036R0</a></td> + <td class="full" align="center">Clang 3.9</td> + </tr> <tr> - <td>Narrowing contextual conversions to bool</td> - <td><a href="https://wg21.link/P1401R5">P1401R5</a></td> - <td class="full" align="center">Clang 14</td> + <td><tt>u8</tt> character literals</td> + <td><a href="https://wg21.link/n4267">N4267</a></td> + <td class="full" align="center">Clang 3.6</td> </tr> <tr> - <td>Trimming whitespaces before line splicing</td> - <td><a href="https://wg21.link/P2223R2">P2223R2</a></td> - <td class="full" align="center">Yes</td> + <td>Nested namespace definition</td> + <td><a href="https://wg21.link/n4230">N4230</a></td> + <td class="full" align="center">Clang 3.6</td> </tr> <tr> - <td>Make declaration order layout mandated</td> - <td><a href="https://wg21.link/p1847r4">P1874R4</a></td> - <td class="full" align="center">Yes</td> + <td>Attributes for namespaces and enumerators</td> + <td><a href="https://wg21.link/n4266">N4266</a></td> + <td class="full" align="center">Clang 3.6</td> </tr> <tr> - <td>C++ identifier syntax using UAX 31</td> - <td><a href="https://wg21.link/P1949R7">P1949R7</a></td> - <td class="full" align="center">Clang 14</td> + <td>Allow constant evaluation for all non-type template arguments</td> + <td><a href="https://wg21.link/n4268">N4268</a></td> + <td class="full" align="center">Clang 3.6</td> </tr> + <!-- Kona papers --> <tr> - <td>Mixed string literal concatenation</td> - <td><a href="https://wg21.link/p2201r1">P2201R1</a></td> + <td>Remove deprecated <tt>register</tt> storage class</td> + <td><a href="https://wg21.link/p0001r1">P0001R1</a></td> + <td class="full" align="center">Clang 3.8</td> + </tr> + <tr> + <td>Remove deprecated <tt>bool</tt> increment</td> + <td><a href="https://wg21.link/p0002r1">P0002R1</a></td> + <td class="full" align="center">Clang 3.8</td> + </tr> + <tr> + <td>Make exception specifications part of the type system</td> + <td><a href="https://wg21.link/p0012r1">P0012R1</a></td> + <td class="full" align="center">Clang 4</td> + </tr> + <tr> + <td><tt>__has_include</tt> in preprocessor conditionals</td> + <td><a href="https://wg21.link/p0061r1">P0061R1</a></td> <td class="full" align="center">Yes</td> </tr> - <!-- October 2021 papers --> + <!-- Jacksonville papers --> <tr> - <td rowspan=2>Deducing this</td> - <td><a href="https://wg21.link/P0847R7">P0847R7</a></td> - <td class="none" align="center">No</td> + <td><tt>[[fallthrough]]</tt> attribute</td> + <td><a href="https://wg21.link/p0188r1">P0188R1</a></td> + <td class="full" align="center">Clang 3.9</td> </tr> <tr> - <td><a href="https://wg21.link/P2797R0">P2797R0</a></td> - <td class="none" align="center">No</td> + <td rowspan="2"><tt>[[nodiscard]]</tt> attribute</td> + <td><a href="https://wg21.link/p0189r1">P0189R1</a></td> + <td class="full" align="center">Clang 3.9</td> </tr> + <tr> <!-- from Cologne 2019 --> + <td><a href="https://wg21.link/p1771r1">P1771R1</a> (<a href="#dr">DR</a>)</td> + <td class="full" align="center">Clang 9</td> + </tr> <tr> - <td rowspan=2>Change scope of lambda trailing-return-type</td> - <td><a href="https://wg21.link/P2036R3">P2036R3</a></td> - <td rowspan=2 class="unreleased" align="center">Clang 17</td> + <td><tt>[[maybe_unused]]</tt> attribute</td> + <td><a href="https://wg21.link/p0212r1">P0212R1</a></td> + <td class="full" align="center">Clang 3.9</td> </tr> <tr> - <td><a href="https://wg21.link/P2579R0">P2579R0</a></td> + <td>Aggregate initialization of classes with base classes</td> + <td><a href="https://wg21.link/p0017r1">P0017R1</a></td> + <td class="full" align="center">Clang 3.9</td> </tr> <tr> - <td>Multidimensional subscript operator</td> - <td><a href="https://wg21.link/P2128R6">P2128R6</a></td> - <td class="full" align="center">Clang 15</td> + <td><tt>constexpr</tt> lambda expressions</td> + <td><a href="https://wg21.link/p0170r1">P0170R1</a></td> + <td class="full" align="center">Clang 5</td> </tr> <tr> - <td>Non-literal variables (and labels and gotos) in constexpr functions</td> - <td><a href="https://wg21.link/P2242R3">P2242R3</a></td> - <td class="full" align="center">Clang 15</td> + <td>Differing <tt>begin</tt> and <tt>end</tt> types in range-based <tt>for</tt></td> + <td><a href="https://wg21.link/p0184r0">P0184R0</a></td> + <td class="full" align="center">Clang 3.9</td> </tr> <tr> - <td>Character encoding of diagnostic text</td> - <td><a href="https://wg21.link/P2246R1">P2246R1</a></td> - <td class="full" align="center">Yes</td> + <td>Lambda capture of <tt>*this</tt></td> + <td><a href="https://wg21.link/p0018r3">P0018R3</a></td> + <td class="full" align="center">Clang 3.9</td> </tr> <tr> - <td>Character sets and encodings</td> - <td><a href="https://wg21.link/P2314R4">P2314R4</a></td> - <td class="full" align="center">Yes</td> + <td>Direct-list-initialization of <tt>enum</tt>s</td> + <td><a href="https://wg21.link/p0138r2">P0138R2</a></td> + <td class="full" align="center">Clang 3.9</td> </tr> <tr> - <td>Consistent character literal encoding</td> - <td><a href="https://wg21.link/P2316R2">P2316R2</a></td> + <td>Hexadecimal floating-point literals</td> + <td><a href="https://wg21.link/p0245r1">P0245R1</a></td> <td class="full" align="center">Yes</td> </tr> + <!-- Oulu papers --> <tr> - <td>Add support for preprocessing directives elifdef and elifndef</td> - <td><a href="https://wg21.link/P2334R1">P2334R1</a></td> - <td class="full" align="center">Clang 13</td> + <td>Using attribute namespaces without repetition</td> + <td><a href="https://wg21.link/p0028r4">P0028R4</a></td> + <td class="full" align="center">Clang 3.9</td> </tr> <tr> - <td>Extend init-statement to allow alias-declaration</td> - <td><a href="https://wg21.link/P2360R0">P2360R0</a></td> - <td class="full" align="center">Clang 14</td> + <td>Dynamic memory allocation for over-aligned data</td> + <td><a href="https://wg21.link/p0035r4">P0035R4</a></td> + <td class="full" align="center">Clang 4</td> </tr> <tr> - <td>auto(x): decay-copy in the language</td> - <td><a href="https://wg21.link/P0849R8">P0849R8</a></td> - <td class="full" align="center">Clang 15</td> + <td rowspan="4">Template argument deduction for class templates</td> + <td><a href="https://wg21.link/p0091r3">P0091R3</a></td> + <td rowspan="2" class="full" align="center">Clang 5</td> </tr> - <!-- February 2022 papers --> + <tr> <!-- from Issaquah --> + <td><a href="https://wg21.link/p0512r0">P0512R0</a></td> + </tr> + <tr> + <!-- from Kona 2017 --> + <td><a href="https://wg21.link/p0620r1">P0620R0</a> (<a href="#dr">DR</a>)</td> + <td class="full" align="center">Clang 7</td> + </tr> + <tr> + <!-- from Toronto 2017 --> + <td><a href="https://wg21.link/p0702r1">P0702R1</a> (<a href="#dr">DR</a>)</td> + <td class="full" align="center">Clang 6</td> + </tr> <tr> - <td>Attributes on Lambda-Expressions</td> - <td><a href="https://wg21.link/P2173R1">P2173R1</a></td> - <td class="full" align="center">Clang 13</td> + <td>Non-type template parameters with <tt>auto</tt> type</td> + <td><a href="https://wg21.link/p0127r2">P0127R2</a></td> + <td class="full" align="center">Clang 4</td> </tr> <tr> - <td><tt>constexpr</tt> for <tt><cmath></tt> and <tt><cstdlib></tt></td> - <td><a href="https://wg21.link/P0533R9">P0533R9</a></td> - <td class="none" align="center">No</td> + <td>Guaranteed copy elision</td> + <td><a href="https://wg21.link/p0135r1">P0135R1</a></td> + <td class="full" align="center">Clang 4</td> </tr> <tr> - <td>Type trait to determine if a reference binds to a temporary</td> - <td><a href="https://wg21.link/P2255R2">P2255R2</a></td> - <td class="partial" align="center"> - <details><summary>Partial</summary> - Clang provides a <tt>__reference_binds_to_temporary</tt> type trait - builtin, with which the library facility can be partially implemented. - Both <tt>__reference_constructs_from_temporary</tt> and - <tt>__reference_converts_from_temporary</tt> builtins should be - provided, following the normal cross-vendor convention to implement - traits requiring compiler support directly. - </details></td> - </td> + <td rowspan=2>Stricter expression evaluation order</td> + <td><a href="https://wg21.link/p0145r3">P0145R3</a></td> + <td class="full" align="center" rowspan=2>Clang 4 <a href="#p0145">(9)</a></td> </tr> - <!-- July 2022 papers --> <tr> - <td>The Equality Operator You Are Looking For</td> - <td><a href="https://wg21.link/P2468R2">P2468R2</a></td> - <td class="full" align="center">Clang 16</td> + <td><a href="https://wg21.link/p0400r0">P0400R0</a></td> </tr> <tr> - <td>De-deprecating volatile compound operations</td> - <td><a href="https://wg21.link/P2327R1">P2327R1</a></td> - <td class="full" align="center">Clang 15</td> + <td>Requirement to ignore unknown attributes</td> + <td><a href="https://wg21.link/p0283r2">P0283R2</a></td> + <td class="full" align="center">Yes</td> </tr> <tr> - <td>Support for <code>#warning</code></td> - <td><a href="https://wg21.link/P2437R1">P2437R1</a></td> - <td class="full" align="center">Yes</td> + <td><tt>constexpr</tt> <em>if-statement</em>s</td> + <td><a href="https://wg21.link/p0292r2">P0292R2</a></td> + <td class="full" align="center">Clang 3.9</td> </tr> <tr> - <td>Remove non-encodable wide character literals and multicharacter wide character literals</td> - <td><a href="https://wg21.link/P2362R3">P2362R3</a></td> - <td class="full" align="center">Clang 14</td> + <td>Inline variables</td> + <td><a href="https://wg21.link/p0386r2">P0386R2</a></td> + <td class="full" align="center">Clang 3.9</td> </tr> <tr> - <td>Labels at the end of compound statements</td> - <td><a href="https://wg21.link/P2324R2">P2324R2</a></td> - <td class="full" align="center">Clang 16</td> + <td rowspan="3">Structured bindings</td> + <td><a href="https://wg21.link/p0217r3">P0217R3</a></td> + <td class="full" align="center">Clang 4</td> </tr> + <tr> + <!-- from Jacksonville 2018 --> + <td><a href="https://wg21.link/p0961r1">P0961R1</a> (<a href="#dr">DR</a>)</td> + <td class="full" align="center">Clang 8</td> + </tr> + <tr> + <!-- from Jacksonville 2018 --> + <td><a href="https://wg21.link/p0969r0">P0969R0</a> (<a href="#dr">DR</a>)</td> + <td class="full" align="center">Clang 8</td> + </tr> <tr> - <td>Delimited escape sequences</td> - <td><a href="https://wg21.link/P2290R3">P2290R3</a></td> - <td class="full" align="center">Clang 15</td> + <td>Separate variable and condition for <tt>if</tt> and <tt>switch</tt></td> + <td><a href="https://wg21.link/p0305r1">P0305R1</a></td> + <td class="full" align="center">Clang 3.9</td> </tr> + <!-- Issaquah 2016 papers --> <tr> - <td>Named universal character escapes</td> - <td><a href="https://wg21.link/P2071R2">P2071R2</a></td> - <td class="full" align="center">Clang 15</td> + <td>Matching template template parameters to compatible arguments</td> + <td><a href="https://wg21.link/p0522r0">P0522R0</a></td> + <td class="partial" align="center">Partial <a href="#p0522">(10)</a></td> </tr> <tr> - <td>Relaxing some constexpr restrictions</td> - <td><a href="https://wg21.link/P2448R2">P2448R2</a></td> - <td class="partial" align="center"> - <details><summary>Clang 17 (Partial)</summary> - We do not support outside of defaulted special memeber functions the change that constexpr functions no - longer have to be constexpr compatible but rather support a less restricted requirements for constexpr - functions. Which include allowing non-literal types as return values and parameters, allow calling of - non-constexpr functions and constructors. - </details></td> - </td> + <td>Removing deprecated dynamic exception specifications</td> + <td><a href="https://wg21.link/p0003r5">P0003R5</a></td> + <td class="full" align="center">Clang 4</td> </tr> <tr> - <td>Using unknown pointers and references in constant expressions</td> - <td><a href="https://wg21.link/P2280R4">P2280R4</a></td> - <td class="none" align="center">No</td> + <td>Pack expansions in <em>using-declarations</em></td> + <td><a href="https://wg21.link/p0195r2">P0195R2</a></td> + <td class="full" align="center">Clang 4</td> </tr> +</table> + +<p> +<span id="n3922">(8): This is a backwards-incompatible change that is applied to +all language versions that allow type deduction from <tt>auto</tt> +(per the request of the C++ committee). +In Clang 3.7, a warning is emitted for all cases that would change meaning. +</span><br> +<span id="p0145">(9): Under the MS ABI, function parameters are destroyed from +left to right in the callee. As a result, function parameters in calls to +<tt>operator<<</tt>, <tt>operator>></tt>, <tt>operator->*</tt>, +<tt>operator&&</tt>, <tt>operator||</tt>, and <tt>operator,</tt> +functions using expression syntax are no longer guaranteed to be destroyed in +reverse construction order in that ABI. +This is not fully supported during constant expression evaluation until Clang 12. +</span><br> +<span id="p0522">(10): Despite being the resolution to a Defect Report, this +feature is disabled by default in all language versions, and can be enabled +explicitly with the flag <tt>-frelaxed-template-template-args</tt> in Clang 4 +onwards. +The change to the standard lacks a corresponding change for template partial +ordering, resulting in ambiguity errors for reasonable and previously-valid +code. This issue is expected to be rectified soon. +</span> +</p> +</details> + +<h2 id="cxx14">C++14 implementation status</h2> + +<p>Clang 3.4 and later implement all of the <a + href="https://www.iso.org/standard/64029.html">ISO + C++ 2014 standard</a>.</p> + +<p>You can use Clang in C++14 mode with the <code>-std=c++14</code> option +(use <code>-std=c++1y</code> in Clang 3.4 and earlier).</p> + +<details> +<summary>List of features and minimum Clang version with support</summary> + +<table width="689" border="1" cellspacing="0"> + <tr> + <th>Language Feature</th> + <th>C++14 Proposal</th> + <th>Available in Clang?</th> + </tr> <tr> - <td>static <code>operator()</code></td> - <td><a href="https://wg21.link/P1169R4">P1169R4</a></td> - <td class="full" align="center">Clang 16</td> + <td>Tweak to certain C++ contextual conversions</td> + <td><a href="https://wg21.link/n3323">N3323</a></td> + <td class="full" align="center">Clang 3.4</td> </tr> <tr> - <td>Extended floating-point types and standard names</td> - <td><a href="https://wg21.link/P1467R9">P1467R9</a></td> - <td class="none" align="center">No</td> + <td>Binary literals</td> + <td><a href="https://wg21.link/n3472">N3472</a></td> + <td class="full" align="center">Clang 2.9</td> </tr> <tr> - <td>Class template argument deduction from inherited constructors</td> - <td><a href="https://wg21.link/P2582R1">P2582R1</a></td> - <td class="none" align="center">No</td> + <td>decltype(auto)</td> + <td rowspan=2 style="vertical-align:middle"><a href="https://wg21.link/n3638">N3638</a></td> + <td class="full" align="center">Clang 3.3</td> </tr> <tr> - <td>Portable assumptions</td> - <td><a href="https://wg21.link/P1774R8">P1774R8</a></td> - <td class="none" align="center">No</td> + <td>Return type deduction for normal functions</td> + <td class="full" align="center">Clang 3.4</td> </tr> <tr> - <td>Support for UTF-8 as a portable source file encoding</td> - <td><a href="https://wg21.link/P2295R6">P2295R6</a></td> - <td class="full" align="center">Clang 15</td> + <td>Initialized lambda captures</td> + <td><a href="https://wg21.link/n3648">N3648</a></td> + <td class="full" align="center">Clang 3.4</td> </tr> <tr> - <td><code>char8_t</code> Compatibility and Portability Fix</td> - <td><a href="https://wg21.link/P2513R3">P2513R3</a></td> - <td class="full" align="center">Clang 16</td> + <td>Generic lambdas</td> + <td><a href="https://wg21.link/n3649">N3649</a></td> + <td class="full" align="center">Clang 3.4</td> </tr> <tr> - <td>Relax requirements on <code>wchar_t</code> to match existing practices</td> - <td><a href="https://wg21.link/P2460R2">P2460R2</a></td> - <td class="full" align="center">Yes</td> + <td>Variable templates</td> + <td><a href="https://wg21.link/n3651">N3651</a></td> + <td class="full" align="center">Clang 3.4</td> </tr> <tr> - <td>Explicit lifetime management</td> - <td><a href="https://wg21.link/P2590R2">P2590R2</a></td> - <td class="none" align="center">No</td> + <td>Relaxing requirements on constexpr functions</td> + <td><a href="https://wg21.link/n3652">N3652</a></td> + <td class="full" align="center">Clang 3.4</td> </tr> - <!-- November 2022 (Kona) papers --> <tr> - <td>static <code>operator[]</code></td> - <td><a href="https://wg21.link/P2589R1">P2589R1</a></td> - <td class="full" align="center">Clang 16</td> + <td>Member initializers and aggregates</td> + <td><a href="https://wg21.link/n3653">N3653</a></td> + <td class="full" align="center">Clang 3.3</td> </tr> <tr> - <td>Permitting static constexpr variables in constexpr functions</td> - <td><a href="https://wg21.link/P2647R1">P2647R1</a></td> - <td class="full" align="center">Clang 16</td> + <td>Clarifying memory allocation</td> + <td><a href="https://wg21.link/n3664">N3664</a></td> + <td class="full" align="center">Clang 3.4</td> </tr> <tr> - <td>consteval needs to propagate up</td> - <td><a href="https://wg21.link/P2564R3">P2564R3</a> (<a href="#dr">DR</a>)</td> - <td class="none" align="center">No</td> + <td><tt>[[deprecated]]</tt> attribute</td> + <td><a href="https://wg21.link/n3760">N3760</a></td> + <td class="full" align="center">Clang 3.4</td> </tr> <tr> - <td>Lifetime extension in range-based for loops</td> - <td><a href="https://wg21.link/P2718R0">P2718R0</a></td> - <td class="none" align="center">No</td> + <td>Single quotation mark as digit separator</td> + <td><a href="https://wg21.link/n3781">N3781</a></td> + <td class="full" align="center">Clang 3.4</td> </tr> - <!--Issaquah 2023 papers--> <tr> - <td>Referencing The Unicode Standard</td> - <td><a href="https://wg21.link/P2736R2">P2736R2</a></td> - <td class="full" align="center">Yes</td> + <td>C++ Sized Deallocation</td> + <td><a href="https://wg21.link/n3778">N3778</a></td> + <td class="full" align="center">Clang 3.4 <a href="#n3778">(7)</a></td> </tr> </table> + +<p> +<span id="n3778">(7): In Clang 3.7 and later, sized deallocation is only enabled +if the user passes the <code>-fsized-deallocation</code> flag. The user must +supply definitions of the sized deallocation functions, either by providing them +explicitly or by using a C++ standard library that does. <code>libstdc++</code> +added these functions in version 5.0, and <code>libc++</code> added them in +version 3.7. +</span> +</p> </details> -<h2 id="cxx26">C++2c implementation status</h2> +<h2 id="cxx11">C++11 implementation status</h2> -<!-- TODO add link to the ISO Standard after it's published. --> -<p>Clang has support for some of the features of the C++ standard following -C++23, informally referred to as C++26.</p> +<p>Clang 3.3 and later implement all of the <a + href="https://www.iso.org/standard/50372.html">ISO + C++ 2011 standard</a>.</p> -<p>You can use Clang in C++2c mode with the <code>-std=c++2c</code> option.</p> +<p>You can use Clang in C++11 mode with the <code>-std=c++11</code> +option. Clang's C++11 mode can be used with +<a href="https://libcxx.llvm.org/">libc++</a> or with gcc's libstdc++.</p> -<details open> +<details> <summary>List of features and minimum Clang version with support</summary> + <table width="689" border="1" cellspacing="0"> <tr> <th>Language Feature</th> - <th>C++26 Proposal</th> + <th>C++11 Proposal</th> <th>Available in Clang?</th> </tr> - </table> - </details> + <tr> + <td rowspan="2">Rvalue references</td> + <td><a href="https://wg21.link/n2118">N2118</a></td> + <td class="full" align="center">Clang 2.9</td> + <tr> <!-- from Kona 2019--> + <td><a href="https://wg21.link/p1825r0">P1825R0</a> (<a href="#dr">DR</a>)</td> + <td class="full" align="center">Clang 13</td> + </tr> + </tr> + <tr> + <td> Rvalue references for <code>*this</code></td> + <td><a href="https://wg21.link/n2439">N2439</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Initialization of class objects by rvalues</td> + <td><a href="https://wg21.link/n1610">N1610</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Non-static data member initializers</td> + <td><a href="https://wg21.link/n2756">N2756</a></td> + <td class="full" align="center">Clang 3.0</td> + </tr> + <tr> + <td>Variadic templates</td> + <td><a href="https://wg21.link/n2242">N2242</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td> Extending variadic template template parameters</td> + <td><a href="https://wg21.link/n2555">N2555</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td rowspan="3">Initializer lists</td> + <td><a href="https://wg21.link/n2672">N2672</a></td> + <td class="full" align="center">Clang 3.1</td> + </tr> + <tr> <!-- from Kona 2019--> + <td><a href="https://wg21.link/p1009r2">P1009R2</a> (<a href="#dr">DR</a>)</td> + <td class="full" align="center">Clang 9</td> + </tr> + <tr> <!-- from Prague--> + <td><a href="https://wg21.link/p1957r2">P1957R2</a> (<a href="#dr">DR</a>)</td> + <td class="full" align="center">Clang 11</td> + </tr> + <tr> + <td>Static assertions</td> + <td><a href="https://wg21.link/n1720">N1720</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td><code>auto</code>-typed variables</td> + <td><a href="https://wg21.link/n1984">N1984</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td> Multi-declarator <code>auto</code></td> + <td><a href="https://wg21.link/n1737">N1737</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td> Removal of auto as a storage-class specifier</td> + <td><a href="https://wg21.link/n2546">N2546</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td> New function declarator syntax</td> + <td><a href="https://wg21.link/n2541">N2541</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td rowspan="2">Lambda expressions</td> + <td><a href="https://wg21.link/n2927">N2927</a></td> + <td class="full" align="center">Clang 3.1</td> + </tr> + <tr> + <!-- from Albuquerque 2017 --> + <td><a href="https://wg21.link/p0588r1">P0588R1</a> (<a href="#dr">DR</a>)</td> + <td class="none" align="center">No</td> + </tr> + <tr> + <td>Declared type of an expression</td> + <td><a href="https://wg21.link/n2343">N2343</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td> Incomplete return types</td> + <td><a href="https://wg21.link/n3276">N3276</a></td> + <td class="full" align="center">Clang 3.1</td> + </tr> + <tr> + <td>Right angle brackets</td> + <td><a href="https://wg21.link/n1757">N1757</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Default template arguments for function templates</td> + <td><a href="https://wg21.link/cwg226">DR226</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Solving the SFINAE problem for expressions</td> + <td><a href="https://wg21.link/n2634">DR339</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Alias templates</td> + <td><a href="https://wg21.link/n2258">N2258</a></td> + <td class="full" align="center">Clang 3.0</td> + </tr> + <tr> + <td>Extern templates</td> + <td><a href="https://wg21.link/n1987">N1987</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Null pointer constant</td> + <td><a href="https://wg21.link/n2431">N2431</a></td> + <td class="full" align="center">Clang 3.0</td> + </tr> + <tr> + <td>Strongly-typed enums</td> + <td><a href="https://wg21.link/n2347">N2347</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Forward declarations for enums</td> + <td><a href="https://wg21.link/n2764">N2764</a> + <br><a href="https://wg21.link/cwg1206">DR1206</a></td> + <td class="full" align="center">Clang 3.1</td> + </tr> + <tr> + <td>Standardized attribute syntax</td> + <td><a href="https://wg21.link/n2761">N2761</a></td> + <td class="full" align="center">Clang 3.3 <a href="#n2761">(1)</a></td> + </tr> + <tr> + <td rowspan="2">Generalized constant expressions</td> + <td><a href="https://wg21.link/n2235">N2235</a></td> + <td class="full" align="center">Clang 3.1</td> + </tr> + <tr> + <!-- from Albuquerque 2017 --> + <td><a href="https://wg21.link/p0859r0">P0859R0</a> (<a href="#dr">DR</a>)</td> + <td class="full" align="center">Clang 8</td> + </tr> + <tr> + <td>Alignment support</td> + <td><a href="https://wg21.link/n2341">N2341</a></td> + <td class="full" align="center">Clang 3.3</td> + </tr> + <tr> + <td>Conditionally-support behavior</td> + <td><a href="https://wg21.link/n1627">N1627</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Changing undefined behavior into diagnosable errors</td> + <td><a href="https://wg21.link/n1727">N1727</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Delegating constructors</td> + <td><a href="https://wg21.link/n1986">N1986</a></td> + <td class="full" align="center">Clang 3.0</td> + </tr> + <tr> + <td rowspan="2">Inheriting constructors</td> + <td><a href="https://wg21.link/n2540">N2540</a></td> + <td class="full" align="center">Clang 3.3</td> + </tr> + <tr> + <!-- from Kona 2015 --> + <td><a href="https://wg21.link/p0136r1">P0136R1</a> (<a href="#dr">DR</a>)</td> + <td class="full" align="center">Clang 3.9</td> + </tr> + <tr> + <td>Explicit conversion operators</td> + <td><a href="https://wg21.link/n2437">N2437</a></td> + <td class="full" align="center">Clang 3.0</td> + </tr> + <tr> + <td>New character types</td> + <td><a href="https://wg21.link/n2249">N2249</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Unicode string literals</td> + <td><a href="https://wg21.link/n2442">N2442</a></td> + <td class="full" align="center">Clang 3.0</td> + </tr> + <tr> + <td>Raw string literals</td> + <td><a href="https://wg21.link/n2442">N2442</a></td> + <td class="full" align="center">Clang 3.0</td> + </tr> + <tr> + <td>Universal character names in literals</td> + <td><a href="https://wg21.link/n2170">N2170</a></td> + <td class="full" align="center">Clang 3.1</td> + </tr> + <tr> + <td>User-defined literals</td> + <td><a href="https://wg21.link/n2765">N2765</a></td> + <td class="full" align="center">Clang 3.1</td> + </tr> + <tr> + <td>Standard Layout Types</td> + <td><a href="https://wg21.link/n2342">N2342</a></td> + <td class="full" align="center">Clang 3.0</td> + </tr> + <tr> + <td rowspan="2">Defaulted functions</td> + <td><a href="https://wg21.link/n2346">N2346</a></td> + <td class="full" align="center">Clang 3.0</td> + </tr> + <tr> <!-- from Kona 2019--> + <td><a href="https://wg21.link/p1286r2">P1286R2</a> (<a href="#dr">DR</a>)</td> + <td class="full" align="center">Clang 9</td> + </tr> + <tr> + <td>Deleted functions</td> + <td><a href="https://wg21.link/n2346">N2346</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Extended friend declarations</td> + <td><a href="https://wg21.link/n1791">N1791</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Extending <code>sizeof</code></td> + <td><a href="https://wg21.link/n2253">N2253</a> + <br><a href="https://wg21.link/cwg850">DR850</a></td> + <td class="full" align="center">Clang 3.1</td> + </tr> + <tr> + <td>Inline namespaces</td> + <td><a href="https://wg21.link/n2535">N2535</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Unrestricted unions</td> + <td><a href="https://wg21.link/n2544">N2544</a></td> + <td class="full" align="center">Clang 3.1</td> + </tr> + <tr> + <td>Local and unnamed types as template arguments</td> + <td><a href="https://wg21.link/n2657">N2657</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td rowspan="2">Range-based for</td> + <td><a href="https://wg21.link/n2930">N2930</a></td> + <td class="full" align="center">Clang 3.0</td> + </tr> + <tr> + <!-- from Jacksonville 2018 --> + <td><a href="https://wg21.link/p0962r1">P0962R1</a> (<a href="#dr">DR</a>)</td> + <td class="full" align="center">Clang 8</td> + </tr> + <tr> + <td>Explicit virtual overrides</td> + <td><a href="https://wg21.link/n2928">N2928</a> + <br><a href="https://wg21.link/n3206">N3206</a> + <br><a href="https://wg21.link/n3272">N3272</a></td> + <td class="full" align="center">Clang 3.0</td> + </tr> + <tr> + <td>Minimal support for garbage collection and reachability-based leak detection</td> + <td><a href="https://wg21.link/n2670">N2670</a></td> + <td class="na" align="center">N/A <a href="#n2670">(2)</a></td> + </tr> + <tr> + <td>Allowing move constructors to throw [noexcept]</td> + <td><a href="https://wg21.link/n3050">N3050</a></td> + <td class="full" align="center">Clang 3.0</td> + </tr> + <tr> + <td>Defining move special member functions</td> + <td><a href="https://wg21.link/n3053">N3053</a></td> + <td class="full" align="center">Clang 3.0</td> + </tr> + + <tr class="separator"> + <th align="center" colspan="3">Concurrency</th> + </tr> + <tr> + <td>Sequence points</td> + <td><a href="https://wg21.link/n2239">N2239</a></td> + <td class="full" align="center">Clang 3.3</td> + </tr> + <tr> + <td>Atomic operations</td> + <td><a href="https://wg21.link/n2427">N2427</a></td> + <td class="full" align="center">Clang 3.1</td> + </tr> + <tr> + <td>Strong Compare and Exchange</td> + <td><a href="https://wg21.link/n2748">N2748</a></td> + <td class="full" align="center">Clang 3.1 <a href="#n2748">(3)</a></td> + </tr> + <tr> + <td>Bidirectional Fences</td> + <td><a href="https://wg21.link/n2752">N2752</a></td> + <td class="full" align="center">Clang 3.1</td> + </tr> + + <tr> + <td>Memory model</td> + <td><a href="https://wg21.link/n2429">N2429</a></td> + <td class="full" align="center">Clang 3.2</td> + </tr> + <tr> + <td>Data-dependency ordering: atomics and memory model</td> + <td><a href="https://wg21.link/n2664">N2664</a></td> + <td class="full" align="center">Clang 3.2 <a href="#n2664">(4)</a></td> + </tr> + <tr> + <td>Propagating exceptions</td> + <td><a href="https://wg21.link/n2179">N2179</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Allow atomics use in signal handlers</td> + <td><a href="https://wg21.link/n2547">N2547</a></td> + <td class="full" align="center">Clang 3.1</td> + </tr> + <tr> + <td>Thread-local storage</td> + <td><a href="https://wg21.link/n2659">N2659</a></td> + <td class="full" align="center">Clang 3.3 <a href="#n2659">(5)</a></td> + </tr> + <tr> + <td>Dynamic initialization and destruction with concurrency</td> + <td><a href="https://wg21.link/n2660">N2660</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + + <tr class="separator"> + <th align="center" colspan="3">C99 Features in C++11</th> + </tr> + <tr> + <td><code>__func__</code> predefined identifier</td> + <td><a href="https://wg21.link/n2340">N2340</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>C99 preprocessor</td> + <td><a href="https://wg21.link/n1653">N1653</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td><code>long long</code></td> + <td><a href="https://wg21.link/n1811">N1811</a></td> + <td class="full" align="center">Clang 2.9</td> + </tr> + <tr> + <td>Extended integral types</td> + <td><a href="https://wg21.link/n1988">N1988</a></td> + <td class="na" align="center">N/A <a href="#n1988">(6)</a></td> + </tr> +</table> + +<p> +<span id="n2761">(1): The <code>[[carries_dependency]]</code> attribute +has no effect.</span><br> +<span id="n2670">(2): No compiler changes are required for an implementation +such as Clang that does not provide garbage collection.</span><br> +<span id="n2748">(3): All compare-exchange operations are emitted as +strong compare-exchanges.</span><br> +<span id="n2664">(4): <code>memory_order_consume</code> is lowered to +<code>memory_order_acquire</code>.</span><br> +<span id="n2659">(5): <code>thread_local</code> support +requires a C++ runtime library providing <code>__cxa_thread_atexit</code>, such +as <a href="https://libcxxabi.llvm.org">libc++abi</a> 3.6 or later, +or libsupc++ 4.8 or later.</span><br> +<span id="n1988">(6): No compiler changes are required for an implementation +such as Clang that does not provide any extended integer types. +<code>__int128</code> is not treated as an extended integer type, +because changing <code>intmax_t</code> would be an ABI-incompatible +change.</span> +</p> +</details> + + +<h2 id="cxx98">C++98 implementation status</h2> + +<p>Clang implements all of the ISO C++ 1998 standard + (including the defects addressed in the ISO C++ 2003 standard) + except for <tt>export</tt> (which was removed in C++11). <h2 id="dr">Defect reports</h2> |