Newer
Older
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Clang - C++1z, C++14, C++11 and C++98 Status</title>
<link type="text/css" rel="stylesheet" href="menu.css">
<link type="text/css" rel="stylesheet" href="content.css">
.none { background-color: #FFCCCC }
Richard Smith
committed
.partial { background-color: #FFE0B0 }
Richard Smith
committed
.svn { background-color: #FFFF99 }
.full { background-color: #CCFF99 }
Richard Smith
committed
.na { background-color: #DDDDDD }
span:target { background-color: #FFFFBB; outline: #DDDD55 solid thin; }
td { vertical-align: middle }
</style>
</head>
<body>
<!--#include virtual="menu.html.incl"-->
<div id="content">
<!--*************************************************************************-->
<!--*************************************************************************-->
<p>Last updated: $Date$</p>
<p>Clang fully implements all published ISO C++ standards (<a
href="#cxx98">C++98 / C++03</a>, <a
href="#cxx11">C++11</a>, and <a
href="#cxx14">C++14</a>), and most of the upcoming <a
href="#cxx17">C++1z</a> standard.
<p>The Clang community is continually striving to improve C++ standards
compliance between releases by submitting and tracking <a
href="cxx_dr_status.html">C++ Defect Reports</a> and implementing resolutions
as they become available.</p>
<p>Experimental work is also under way to implement <a href="#ts">C++ Technical
Specifications</a> that will help drive the future of the C++ programming
language.</p>
<p>The <a href="http://llvm.org/bugs/">LLVM bug tracker</a> contains Clang
C++ components that track known bugs with Clang's language conformance in
each language mode.</p>
<h2 id="cxx98">C++98 implementation status</h2>
<p>Clang implements all of the ISO C++ 1998 standard
Douglas Gregor
committed
(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>
<p>Clang 3.3 and later implement all of the <a
href="http://www.iso.org/iso/catalogue_detail.htm?csnumber=50372">ISO
C++ 2011 standard</a>. The following table describes the Clang version
in which each feature became available.</p>
<p>By default, Clang builds C++ code according to the C++98 standard, with many
C++11 features accepted as extensions. 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="http://libcxx.llvm.org/">libc++</a> or with gcc's libstdc++.
<table width="689" border="1" cellspacing="0">
<th>C++11 Proposal</th>
</tr>
<tr>
<td>Rvalue references</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2118.html">N2118</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td> Rvalue references for <code>*this</code></td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2439.htm">N2439</a></td>
</tr>
<tr>
<td>Initialization of class objects by rvalues</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1610.html">N1610</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td>Non-static data member initializers</td>
<td><a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2008/n2756.htm">N2756</a></td>
</tr>
<tr>
<td>Variadic templates</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2242.pdf">N2242</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td> Extending variadic template template parameters</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2555.pdf">N2555</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td>Initializer lists</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2672.htm">N2672</a></td>
<td class="full" align="center">Clang 3.1</td>
</tr>
<tr>
<td>Static assertions</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1720.html">N1720</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td><code>auto</code>-typed variables</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1984.pdf">N1984</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td> Multi-declarator <code>auto</code></td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1737.pdf">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="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2546.htm">N2546</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td> New function declarator syntax</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2541.htm">N2541</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td><a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2927.pdf">N2927</a></td>
<td class="full" align="center">Clang 3.1</td>
</tr>
<tr>
<td>Declared type of an expression</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2343.pdf">N2343</a></td>
<td class="full" align="center">Clang 2.9</td>
<tr>
<td> Incomplete return types</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3276.pdf">N3276</a></td>
<td class="full" align="center">Clang 3.1</td>
</tr>
<tr>
<td>Right angle brackets</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1757.html">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="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#226">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="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2634.html">DR339</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td>Alias templates</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2258.pdf">N2258</a></td>
<td class="full" align="center">Clang 3.0</td>
</tr>
<tr>
<td>Extern templates</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1987.htm">N1987</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td>Null pointer constant</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2431.pdf">N2431</a></td>
<td class="full" align="center">Clang 3.0</td>
</tr>
<tr>
<td>Strongly-typed enums</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2347.pdf">N2347</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td>Forward declarations for enums</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2764.pdf">N2764</a>
<br><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1206">DR1206</a></td>
<td class="full" align="center">Clang 3.1</td>
</tr>
<tr>
<td>Standardized attribute syntax</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2761.pdf">N2761</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.3 <a href="#n2761">(1)</a></td>
</tr>
<tr>
<td>Generalized constant expressions</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2235.pdf">N2235</a></td>
<td class="full" align="center">Clang 3.1</td>
</tr>
<tr>
<td>Alignment support</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2341.pdf">N2341</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.3</td>
Richard Smith
committed
<tr>
<td>Conditionally-support behavior</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1627.pdf">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="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1727.pdf">N1727</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td>Delegating constructors</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1986.pdf">N1986</a></td>
</tr>
<tr>
<td>Inheriting constructors</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2540.htm">N2540</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.3</td>
</tr>
<tr>
<td>Explicit conversion operators</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2437.pdf">N2437</a></td>
<td class="full" align="center">Clang 3.0</td>
</tr>
<tr>
<td>New character types</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2249.html">N2249</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td>Unicode string literals</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2442.htm">N2442</a></td>
<td class="full" align="center">Clang 3.0</td>
</tr>
<tr>
<td>Raw string literals</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2442.htm">N2442</a></td>
<td class="full" align="center">Clang 3.0</td>
</tr>
<tr>
Richard Smith
committed
<td>Universal character names in literals</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2170.html">N2170</a></td>
<td class="full" align="center">Clang 3.1</td>
</tr>
<tr>
<td>User-defined literals</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2765.pdf">N2765</a></td>
<td class="full" align="center">Clang 3.1</td>
</tr>
<tr>
<td>Standard Layout Types</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2342.htm">N2342</a></td>
<td class="full" align="center">Clang 3.0</td>
</tr>
<tr>
<td>Defaulted functions</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2346.htm">N2346</a></td>
<td class="full" align="center">Clang 3.0</td>
</tr>
<tr>
<td>Deleted functions</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2346.htm">N2346</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td>Extended friend declarations</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1791.pdf">N1791</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td>Extending <code>sizeof</code></td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2253.html">N2253</a>
<br><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#850">DR850</a></td>
<td class="full" align="center">Clang 3.1</td>
</tr>
<tr>
<td>Inline namespaces</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2535.htm">N2535</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td>Unrestricted unions</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2544.pdf">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="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm">N2657</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td>Range-based for</td>
<td><a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2930.html">N2930</a></td>
<td class="full" align="center">Clang 3.0</td>
</tr>
<tr>
<td>Explicit virtual overrides</td>
<td><a href="http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2009/n2928.htm">N2928</a>
<br><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3206.htm">N3206</a>
<br><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2011/n3272.htm">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="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2670.htm">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="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3050.html">N3050</a></td>
<td class="full" align="center">Clang 3.0</td>
</tr>
<tr>
<td>Defining move special member functions</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2010/n3053.html">N3053</a></td>
<td class="full" align="center">Clang 3.0</td>
<tr class="separator">
</tr>
<tr>
<td>Sequence points</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2239.html">N2239</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.3</td>
</tr>
<tr>
<td>Atomic operations</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2427.html">N2427</a></td>
<td class="full" align="center">Clang 3.1</td>
</tr>
<tr>
<td>Strong Compare and Exchange</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2748.html">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="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2752.htm">N2752</a></td>
<td class="full" align="center">Clang 3.1</td>
<tr>
<td>Memory model</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2429.htm">N2429</a></td>
</tr>
<tr>
<td>Data-dependency ordering: atomics and memory model</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2664.htm">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="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2179.html">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="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2547.htm">N2547</a></td>
<td class="full" align="center">Clang 3.1</td>
</tr>
<tr>
<td>Thread-local storage</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2659.htm">N2659</a></td>
Richard Smith
committed
<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="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2660.htm">N2660</a></td>
<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="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2340.htm">N2340</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td>C99 preprocessor</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2004/n1653.htm">N1653</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td><code>long long</code></td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1811.pdf">N1811</a></td>
<td class="full" align="center">Clang 2.9</td>
</tr>
<tr>
<td>Extended integral types</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n1988.pdf">N1988</a></td>
Richard Smith
committed
<td class="na" align="center">N/A <a href="#n1988">(6)</a></td>
<p>
<span id="n2761">(1): The <code>[[carries_dependency]]</code> attribute
<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>
Richard Smith
committed
<span id="n2659">(5): <code>thread_local</code> support
requires a C++ runtime library providing <code>__cxa_thread_atexit</code>, such
as <a href="http://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>
<h2 id="cxx14">C++14 implementation status</h2>
<p>Clang 3.4 and later implement all of the <a
href="http://www.iso.org/iso/catalogue_detail.htm?csnumber=64029">ISO
C++ 2014 standard</a>. The following table describes the
Clang version in which each feature became available.</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>
<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>Tweak to certain C++ contextual conversions</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3323.pdf">N3323</a></td>
<td class="full" align="center">Clang 3.4</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3472.pdf">N3472</a></td>
<td class="full" align="center">Clang 2.9</td>
Richard Smith
committed
<td rowspan=2 style="vertical-align:middle"><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3638.html">N3638</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.3</td>
<td>Return type deduction for normal functions</td>
<td class="full" align="center">Clang 3.4</td>
Richard Smith
committed
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3648.html">N3648</a></td>
<td class="full" align="center">Clang 3.4</td>
<td>Generic lambdas</td>
Richard Smith
committed
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3649.html">N3649</a></td>
<td class="full" align="center">Clang 3.4</td>
<td>Variable templates</td>
Richard Smith
committed
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3651.pdf">N3651</a></td>
<td class="full" align="center">Clang 3.4</td>
<td>Relaxing requirements on constexpr functions</td>
Richard Smith
committed
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3652.html">N3652</a></td>
<td class="full" align="center">Clang 3.4</td>
<td>Member initializers and aggregates</td>
Richard Smith
committed
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3653.html">N3653</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.3</td>
Richard Smith
committed
<td>Clarifying memory allocation</td>
Richard Smith
committed
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3664.html">N3664</a></td>
<td class="full" align="center">Clang 3.4</td>
<tr>
<td><tt>[[deprecated]]</tt> attribute</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3760.html">N3760</a></td>
<td class="full" align="center">Clang 3.4</td>
</tr>
<tr>
<td>Single quotation mark as digit separator</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3781.pdf">N3781</a></td>
<td class="full" align="center">Clang 3.4</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3778.html">N3778</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.4 <a href="#n3778">(7)</a></td>
Larisse Voufo
committed
<p>
Richard Smith
committed
<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.
Larisse Voufo
committed
</span>
</p>
Richard Smith
committed
<h2 id="cxx17">C++1z implementation status</h2>
Richard Smith
committed
<p>Clang has <b>experimental</b> support for some proposed features of
the C++ standard following C++14, provisionally named C++1z.
The following table describes which C++1z features
Richard Smith
committed
have been implemented in Clang and in which Clang version they became
available.</p>
<p>Note that support for these features may change or be removed without notice,
as the draft C++1z standard evolves.</p>
Richard Smith
committed
<p>You can use Clang in C++1z mode with the <code>-std=c++1z</code> option.</p>
<table width="689" border="1" cellspacing="0">
<tr>
<th>Language Feature</th>
<th>C++1z Proposal</th>
<th>Available in Clang?</th>
</tr>
<tr>
<td><tt>static_assert</tt> with no message</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3928.pdf">N3928</a></td>
<td class="full" align="center">Clang 3.5</td>
<tr>
<td>Disabling trigraph expansion by default</td>
Richard Smith
committed
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4086.html">N4086</a></td>
<td class="full" align="center">Clang 3.5</td>
<!--
<td rowspan="2">Terse range-based for loops (removed from C++1z)</td>
<td rowspan="2"><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3994.htm">N3994</a></td>
<td class="none" align="center">Clang 3.5: Yes</td>
</tr>
<tr>
<td class="svn" align="center">SVN: No</td>
-->
<tr>
<td><tt>typename</tt> in a template template parameter</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4051.html">N4051</a></td>
<td class="full" align="center">Clang 3.5</td>
Richard Smith
committed
<tr>
<td>New <tt>auto</tt> rules for direct-list-initialization
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3922.html">N3922</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.8 <a href="#n3922">(8)</a></td>
Richard Smith
committed
</tr>
<td rowspan="2">Fold expressions</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4295.html">N4295</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.6</td>
<tr> <!-- from Jacksonville -->
<td><a href="http://wg21.link/p0036r0">P0036R0</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.9</td>
</tr>
<tr>
<td><tt>u8</tt> character literals</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4267.html">N4267</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.6</td>
<tr>
<td>Nested namespace definition</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4230.html">N4230</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.6</td>
<tr>
<td>Attributes for namespaces and enumerators</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4266.html">N4266</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.6</td>
Richard Smith
committed
<tr>
<td>Allow constant evaluation for all non-type template arguments</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4268.html">N4268</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.6</td>
Richard Smith
committed
</tr>
<!-- Kona papers -->
<tr>
<td>Remove deprecated <tt>register</tt> storage class</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/p0001r1.html">P0001R1</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.8</td>
</tr>
<tr>
<td>Remove deprecated <tt>bool</tt> increment</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/p0002r1.html">P0002R1</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.8</td>
</tr>
<tr>
<td>Make exception specifications part of the type system</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/p0012r1.html">P0012R1</a></td>
<td class="none" align="center">No</td>
Richard Smith
committed
<td><tt>__has_include</tt> in preprocessor conditionals</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/p0061.html">P0061R1</a></td>
<td class="full" align="center">Yes</td>
</tr>
Richard Smith
committed
<tr>
<td>New specification for inheriting constructors (<a href="cxx_dr_status.html#1941">DR1941</a> et al)</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/p0136r1.html">P0136R1</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.9 <a href="#p0136">(9)</a></td>
Richard Smith
committed
</tr>
<!-- Jacksonville papers -->
<tr>
<td><tt>[[fallthrough]]</tt> attribute</td>
<td><a href="http://wg21.link/p0188r1">P0188R1</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.9</td>
</tr>
<tr>
<td><tt>[[nodiscard]]</tt> attribute</td>
<td><a href="http://wg21.link/p0189r1">P0189R1</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.9</td>
</tr>
<tr>
<td><tt>[[maybe_unused]]</tt> attribute</td>
<td><a href="http://wg21.link/p0212r1">P0212R1</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.9</td>
</tr>
<tr>
<td>Aggregate initialization of classes with base classes</td>
<td><a href="http://wg21.link/p0017r1">P0017R1</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.9</td>
</tr>
<tr>
<td><tt>constexpr</tt> lambda expressions</td>
<td><a href="http://wg21.link/p0170r1">P0170R1</a></td>
<td class="none" align="center">No</td>
</tr>
<tr>
<td>Differing <tt>begin</tt> and <tt>end</tt> types in range-based <tt>for</tt></td>
<td><a href="http://wg21.link/p0184r0">P0184R0</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.9</td>
</tr>
<tr>
<td>Lambda capture of <tt>*this</tt></td>
<td><a href="http://wg21.link/p0018r3">P0018R3</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.9</td>
</tr>
<tr>
<td>Direct-list-initialization of <tt>enum</tt>s</td>
<td><a href="http://wg21.link/p0138r2">P0138R2</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.9</td>
</tr>
<tr>
<td>Hexadecimal floating-point literals</td>
<td><a href="http://wg21.link/p0245r1">P0245R1</a></td>
<td class="full" align="center">Yes</td>
</tr>
<!-- Oulu papers -->
<tr>
<td>Using attribute namespaces without repetition</td>
<td><a href="http://wg21.link/p0028r4">P0028R4</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.9</td>
</tr>
<tr>
<td>Dynamic memory allocation for over-aligned data</td>
<td><a href="http://wg21.link/p0035r4">P0035R4</a></td>
<td class="none" align="center">No</td>
</tr>
<tr>
<td>Template argument deduction for class templates</td>
<td><a href="http://wg21.link/p0091r3">P0091R3</a></td>
<td class="none" align="center">No</td>
</tr>
<tr>
<td>Non-type template parameters with <tt>auto</tt> type</td>
<td><a href="http://wg21.link/p0127r2">P0127R2</a></td>
<td class="none" align="center">No</td>
</tr>
<tr>
<td>Guaranteed copy elision</td>
<td><a href="http://wg21.link/p0135r1">P0135R1</a></td>
<td class="none" align="center">No</td>
</tr>
<tr>
<td rowspan=2>Stricter expression evaluation order</td>
<td><a href="http://wg21.link/p0145r3">P0145R3</a></td>
Richard Smith
committed
<td class="svn" align="center" rowspan=2>SVN <a href="#p0145">(10)</a></td>
</tr>
<tr>
<td><a href="http://wg21.link/p0400r0">P0400R0</a></td>
</tr>
<tr>
<td>Requirement to ignore unknown attributes</td>
<td><a href="http://wg21.link/p0283r2">P0283R2</a></td>
<td class="full" align="center">Yes</td>
</tr>
<tr>
<td><tt>constexpr</tt> <em>if-statement</em>s</td>
<td><a href="http://wg21.link/p0292r2">P0292R2</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.9</td>
<tr>
<td>Inline variables</td>
<td><a href="http://wg21.link/p0386r2">P0386R2</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.9</td>
</tr>
<tr>
<td>Structured bindings</td>
<td><a href="http://wg21.link/p0217r3">P0217R3</a></td>
Richard Smith
committed
<td class="partial" align="center">Partial</td>
</tr>
<tr>
<td>Separate variable and condition for <tt>if</tt> and <tt>switch</tt></td>
<td><a href="http://wg21.link/p0305r1">P0305R1</a></td>
Richard Smith
committed
<td class="full" align="center">Clang 3.9</td>
Richard Smith
committed
Richard Smith
committed
<p>
Richard Smith
committed
<span id="n3922">(8): This is a backwards-incompatible change that is applied to
Richard Smith
committed
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.
Richard Smith
committed
</span><br>
<span id="p0136">(9): This is the resolution to a Defect Report, so is applied
to all language versions supporting inheriting constructors.
Richard Smith
committed
</span><br>
<span id="p0145">(10): Under the MS ABI, this feature is not fully implementable,
because the calling convention requires that function parameters are destroyed
from left to right in the callee. In order to guarantee that destruction order
is reverse construction order, the operands of overloaded
<tt>operator<<</tt>, <tt>operator>></tt>, <tt>operator->*</tt>,
<tt>operator&&</tt>, <tt>operator||</tt>, and <tt>operator,</tt>
functions are evaluated right-to-left under the MS ABI when called using operator
syntax, not left-to-right as P0145R3 requires.
</span>
Richard Smith
committed
</p>
<h2 id="ts">Technical specifications and standing documents</h2>
<p>ISO C++ also publishes a number of documents describing additional language
and library features that are not part of standard C++. The following table
describes which language features have been implemented in Clang and in which
Clang version they became available:</p>
<table width="689" border="1" cellspacing="0">
<tr>
<th>Document</th>
<th>Latest draft</th>
<th>Available in Clang?</th>
</tr>
<tr>
<td rowspan="2">SD-6: SG10 feature test recommendations</td>
<td rowspan="2"><a href="http://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations">SD-6</a></td>
<td class="full" align="center">
Clang 3.4 (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3745">N3745</a>)</br>
</td>
</tr>
<tr>
Richard Smith
committed
<td class="full" align="center">
Clang 3.6 (<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4200">N4200</a>)</a>
</td>
<tr>
<td class="svn" align="center">
Richard Smith
committed
SVN (<a href="http://wg21.link/p0096r3">P0096R3</a>)</a>
</td>
</tr>
<!-- FIXME: Implement latest recommendations.
<tr>
<td class="svn" align="center">
SVN (<a href="http://wg21.link/p0096r3">P0096R3</a>)</a>
</td>
</tr>
-->
<!-- No compiler support is known to be needed for:
* Concurrency TS
* Parallelism TS
* Ranges TS
* Networking TS
* File System TS
-->
<tr>
<td>[TS] Concepts</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/p0121r0.pdf">P0121R0</a></td>
<td class="none" align="center">No</td>
</tr>
<td>[TS] Library Fundamentals, Version 1 (invocation type traits)</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4480.html">N4480</a></td>
<td class="none" align="center">No</td>
</tr>
Richard Smith
committed
<tr>
<td>[DRAFT TS] Library Fundamentals, Version 2 (<tt>source_location</tt>)</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4529.html">N4529</a></td>
Richard Smith
committed
<td class="none" align="center">No</td>
</tr>
<tr>
<td>[TS] Modules</td>
<td><a href="http://wg21.link/p0143r2">P0143R2</a></td>
<td class="none" align="center">No</td>
</tr>
Richard Smith
committed
<tr>
<td>[TS] Transactional Memory</td>
<td><a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4514.pdf">N4514</a></td>
Richard Smith
committed
<td class="none" align="center">No</td>
</tr>