* doc/xml/manual/intro.xml: Include new section.
* doc/xml/manual/status_cxx2017.xml: Document more
implementation-defined properties of the library.
* doc/xml/manual/status_cxx2020.xml: Document C++2a status.
* doc/html/*: Regenerate.
Committed to trunk.
commit d24c65771c84e98a2800b053e6594cf85b4a9a69
Author: Jonathan Wakely <jwak...@redhat.com>
Date: Fri Jan 11 22:10:09 2019 +0000
Document C++20 library status
* doc/xml/manual/intro.xml: Include new section.
* doc/xml/manual/status_cxx2017.xml: Document more
implementation-defined properties of the library.
* doc/xml/manual/status_cxx2020.xml: Document C++2a status.
* doc/html/*: Regenerate.
diff --git a/libstdc++-v3/doc/xml/manual/intro.xml
b/libstdc++-v3/doc/xml/manual/intro.xml
index 7159b592c9f..28210cb0862 100644
--- a/libstdc++-v3/doc/xml/manual/intro.xml
+++ b/libstdc++-v3/doc/xml/manual/intro.xml
@@ -43,6 +43,10 @@
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude"; parse="xml"
href="status_cxx2017.xml">
</xi:include>
+ <!-- Section 01.4 : Status C++ 2020 -->
+ <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"; parse="xml"
href="status_cxx2020.xml">
+ </xi:include>
+
<!-- Section 01.5 : Status C++ TR1 -->
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude"; parse="xml"
href="status_cxxtr1.xml">
</xi:include>
diff --git a/libstdc++-v3/doc/xml/manual/status_cxx2017.xml
b/libstdc++-v3/doc/xml/manual/status_cxx2017.xml
index f3793083375..0af8a02b00f 100644
--- a/libstdc++-v3/doc/xml/manual/status_cxx2017.xml
+++ b/libstdc++-v3/doc/xml/manual/status_cxx2017.xml
@@ -980,6 +980,14 @@ and test for <code>__STDCPP_MATH_SPEC_FUNCS__ >=
201003L</code>.
documents behaviour which is new in the 2017 standard.
</para>
+ <para>
+ <emphasis>20.5.1.2 [headers]</emphasis>
+ Whether names from Annex K are declared by C++ headers depends on
+ whether the underlying C library supports Annex K and declares the
+ names. For the GNU C library, there is no Annex K support and so
+ none of its names are declared by C++ headers.
+ </para>
+
<para>
<emphasis>23.6.5 [optional.bad_optional_access]</emphasis>
<code>what()</code> returns <literal>"bad optional access"</literal>.
@@ -987,8 +995,7 @@ and test for <code>__STDCPP_MATH_SPEC_FUNCS__ >=
201003L</code>.
<para>
<emphasis>23.7.3 [variant.variant]</emphasis>
- Whether <classname>variant</classname> supports over-aligned types
- should be documented here.
+ <classname>variant</classname> supports over-aligned types.
</para>
<para>
@@ -998,15 +1005,21 @@ and test for <code>__STDCPP_MATH_SPEC_FUNCS__ >=
201003L</code>.
<para>
<emphasis>23.12.5.2 [memory.resource.pool.options]</emphasis>
- The limits for maximum number of blocks and largest allocation size
- supported by <classname>pool_options</classname> should be documented
- here.
+ Let S equal <code>numeric_limits<size_t>::digits</code>.
+ The limit for maximum number of blocks in a chunk is given by
+
<inlineequation><mathphrase>2<superscript>N</superscript>-1</mathphrase></inlineequation>,
+ where N is <inlineequation><mathphrase>min(19, 3 +
S/2)</mathphrase></inlineequation>.
+ The largest allocation size that will be allocated from a pool is
+
<inlineequation><mathphrase>2<superscript>22</superscript></mathphrase></inlineequation>
+ when <inlineequation><mathphrase>S > 20</mathphrase></inlineequation>,
+ otherwise 3072 when <inlineequation><mathphrase>S >
16</mathphrase></inlineequation>,
+ otherwise 768.
</para>
<para>
<emphasis>23.12.6.1 [memory.resource.monotonic.buffer.ctor]</emphasis>
- The default <code>next_buffer_size</code> and growth factor should
- be documented here.
+ The default <code>next_buffer_size</code> is <code>128 *
sizeof(void*)</code>.
+ The default growth factor is <code>1.5</code>.
</para>
<para>
@@ -1067,13 +1080,32 @@ and test for <code>__STDCPP_MATH_SPEC_FUNCS__ >=
201003L</code>.
<para>
<emphasis>30.10.5 [fs.filesystem.syn]</emphasis>
- The clock used for file times is
- <classname>std::chrono::system_clock</classname>.
+ The clock used for file times is an unspecified type
+ with a signed 64-bit representation, capable of representing
+ timestamps with nanosecond resolution. The clock's epoch is
+ unspecified, but is not the same as the system clock's epoch.
</para>
<para>
<emphasis>30.10.7.1 [fs.path.generic]</emphasis>
dot-dot in the root-directory refers to the root-directory itself.
+ On Windows, a drive specifier such as <code>"C:"</code> or
+ <code>"z:"</code> is treated as a root-name. On Cygwin, a path
+ that begins with two successive directory separators is a
+ root-name. Otherwise (for POSIX-like systems other than Cygwin),
+ the implementation-defined root-name is an unspecified string
+ which does not appear in any pathnames.
+ </para>
+
+ <para>
+ <emphasis>30.10.10.1 [fs.enum.path.format]</emphasis>
+ The character sequence is always interpreted in the native pathname
+ format.
+ </para>
+
+ <para>
+ <emphasis>30.10.15.4 [fs.op.file_size]</emphasis>
+ If <code>!is_regular_file(p)</code>, an error is reported.
</para>
diff --git a/libstdc++-v3/doc/xml/manual/status_cxx2020.xml
b/libstdc++-v3/doc/xml/manual/status_cxx2020.xml
new file mode 100644
index 00000000000..67353850ce5
--- /dev/null
+++ b/libstdc++-v3/doc/xml/manual/status_cxx2020.xml
@@ -0,0 +1,980 @@
+<section xmlns="http://docbook.org/ns/docbook"; version="5.0"
+ xml:id="status.iso.2020" xreflabel="Status C++ 2020">
+<?dbhtml filename="status_iso_cxx2020.html"?>
+
+<info><title>C++ 202a</title>
+ <keywordset>
+ <keyword>ISO C++</keyword>
+ <keyword>2020</keyword>
+ </keywordset>
+</info>
+
+<para>
+In this implementation the <literal>-std=gnu++2a</literal> or
+<literal>-std=c++2a</literal> flag must be used to enable language
+and library
+features. See <link linkend="manual.intro.using.flags">dialect</link>
+options. The pre-defined symbol
+<constant>__cplusplus</constant> is used to check for the
+presence of the required flag.
+</para>
+
+<para>
+This section describes the C++20 and library TS support in mainline GCC SVN,
+not in any particular release.
+</para>
+
+<para>
+The following table lists new library features that have been accepted into
+the C++2a working draft. The "Proposal" column provides a link to the
+ISO C++ committee proposal that describes the feature, while the "Status"
+column indicates the first version of GCC that contains an implementation of
+this feature (if it has been implemented).
+The "SD-6 Feature Test" column shows the corresponding macro or header from
+<link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations";>SD-6:
+Feature-testing recommendations for C++</link>.
+</para>
+
+<table frame="all" xml:id="table.cxx20_status">
+<title>C++ 2020 Implementation Status</title>
+
+<tgroup cols="4" align="left" colsep="0" rowsep="1">
+<colspec colname="c1"/>
+<colspec colname="c2"/>
+<colspec colname="c3"/>
+<colspec colname="c4"/>
+ <thead>
+ <row>
+ <entry>Library Feature</entry>
+ <entry>Proposal</entry>
+ <entry>Status</entry>
+ <entry>SD-6 Feature Test</entry>
+ </row>
+ </thead>
+
+ <tbody>
+
+ <row>
+ <entry> Endian just Endian </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0463r1.html";>
+ P0463R1
+ </link>
+ </entry>
+ <entry align="center"> 8.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Extending <code>make_shared</code> to Support Arrays </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0674r1.html";>
+ P0674R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Floating Point Atomic </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0020r6.html";>
+ P0020R6
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> C++ Synchronized Buffered Ostream </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0053r7.pdf";>
+ P0053R7
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Add constexpr modifiers to functions in
<code><algorithm></code> and <code><utility></code> Headers </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0202r3.html";>
+ P0202R3
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> Constexpr for <code>std::complex</code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0415r1.html";>
+ P0415R1
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Make <code>std::memory_order</code> a scoped enumeration
</entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0439r0.html";>
+ P0439R0
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> String Prefix and Suffix Checking </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0457r2.html";>
+ P0457R2
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> Transformation Trait <code>remove_cvref</code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0550r2.pdf";>
+ P0550R2
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> <code>nodiscard</code> in the Library </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0600r1.pdf";>
+ P0600R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> de-pessimize legacy algorithms with <code>std::move</code>
</entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0616r0.pdf";>
+ P0616R0
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> Utility to convert a pointer to a raw pointer </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0653r2.html";>
+ P0653R2
+ </link>
+ </entry>
+ <entry align="center"> 8.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Atomic <code>shared_ptr</code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0718r2.html";>
+ P0718R2
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Deprecate POD </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0767r1.html";>
+ P0767R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Library Support for the Spaceship (Comparison) Operator </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0768r1.pdf";>
+ P0768R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Treating Unnecessary <code>decay</code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0777r1.pdf";>
+ P0777R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> <code><span></code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0122r7.pdf";>
+ P0122R7
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Extending chrono to Calendars and Time Zones </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0355r7.html";>
+ P0355R7
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Thou Shalt Not Specialize std Function Templates! </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0551r3.pdf";>
+ P0551R3
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Manipulators for C++ Synchronized Buffered Ostream </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0753r2.pdf";>
+ P0753R2
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> <code><version></code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0754r2.pdf";>
+ P0754R2
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Comparing Unordered Containers </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0809r0.pdf";>
+ P0809R0
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Constexpr iterator requirements </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0858r0.html";>
+ P0858R0
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Symmetry for spaceship </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0905r1.html";>
+ P0905R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> <code>string::reserve</code> Should Not Shrink </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0966r1.html";>
+ P0966R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Atomic Ref </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0019r8.html";>
+ P0019R8
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> Checking for Existence of an Element in Associative Containers
</entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0458r2.html";>
+ P0458R2
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> LWG 2511: guaranteed copy elision for piecewise construction
</entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0475r1.html";>
+ P0475R1
+ </link>
+ </entry>
+ <entry align="center"> 7.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Bit-casting object representations </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0476r2.html";>
+ P0476R2
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> The Curious Case of Padding Bits, Featuring Atomic
Compare-and-Exchange </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0528r3.html";>
+ P0528R3
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Support for contract based programming in C++ </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0542r5.html";>
+ P0542R5
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> Integral power-of-2 operations </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0556r3.html";>
+ P0556R3
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Reviewing Deprecated Facilities of C++17 for C++20 </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0619r4.html";>
+ P0619R4
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> Improving the Return Value of Erase-Like Algorithms </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0646r1.pdf";>
+ P0646R1
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry> <code>__cpp_lib_list_remove_return_type >= 201806L</code>
</entry>
+ </row>
+
+ <row>
+ <entry> Efficient sized delete for variable sized classes </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0722r3.html";>
+ P0722R3
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry> <code>__cpp_lib_destroying_delete >= 201806L</code> </entry>
+ </row>
+
+ <row>
+ <entry> Implicit conversion traits and utility functions </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0758r1.html";>
+ P0758R1
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> <code>fpos</code> Requirements </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0759r1.html";>
+ P0759R1
+ </link>
+ </entry>
+ <entry align="center"> Note 1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Add <code>shift</code> to <code><algorithm></code>
</entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0769r2.pdf";>
+ P0769R2
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Standard Library Specification in a Concepts and Contracts
World </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0788r3.pdf";>
+ P0788R3
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Constexpr for <code>swap</code> and swap related functions
</entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0879r0.html";>
+ P0879R0
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> The <code>identity</code> metafunction </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0887r1.pdf";>
+ P0887R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> <code>explicit(bool)</code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0892r2.html";>
+ P0892R2
+ </link>
+ </entry>
+ <entry align="center"> Note 1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Standard Library Concepts </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0898r3.pdf";>
+ P0898R3
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> Eradicating unnecessarily explicit default constructors from
the standard library </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0935r0.html";>
+ P0935R0
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> Integrating feature-test macros into the C++ WD </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0941r2.html";>
+ P0941R2
+ </link>
+ </entry>
+ <entry align="center"> 5.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> <code>constexpr</code> comparison operators for
<code>std::array</code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1023r0.pdf";>
+ P1023R0
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Update The Reference To The Unicode Standard </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1025r1.html";>
+ P1025R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Consistency improvements for <code><=></code> and other
comparison operators </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1120r0.html";>
+ P1120R0
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> <code>unwrap_ref_decay</code> and <code>unwrap_reference</code>
</entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0318r1.pdf";>
+ P0318R1
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Simplified partial function application </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0356r5.html";>
+ P0356R5
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> <code>reference_wrapper</code> for incomplete types </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0357r3.html";>
+ P0357R3
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> <code>char8_t</code>: A type for UTF-8 characters and strings
</entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0482r6.html";>
+ P0482R6
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Fixing <code>operator>>(basic_istream&,
CharT*)</code> (LWG 2499) </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0487r1.html";>
+ P0487R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Utility functions to implement uses-allocator construction
</entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0591r4.pdf";>
+ P0591R4
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> P0595R2 <code>std::is_constant_evaluated()</code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0595r2.html";>
+ P0595R2
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> <code>variant</code> and <code>optional</code> should propagate
copy/move triviality </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0602r4.html";>
+ P0602R4
+ </link>
+ </entry>
+ <entry align="center"> 8.3 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> A sane <code>variant</code> converting constructor </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0608r3.html";>
+ P0608R3
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> <code>visit<R></code>: Explicit Return Type for
<code>visit</code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0655r1.pdf";>
+ P0655R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> <code>std::function</code> move constructor should be
<code>noexcept</code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0771r1.pdf";>
+ P0771R1
+ </link>
+ </entry>
+ <entry align="center"> 7.2 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> The One Ranges Proposal </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0896r4.pdf";>
+ P0896R4
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> P0899R1 - LWG 3016 is not a defect </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0899r1.html";>
+ P0899R1
+ </link>
+ </entry>
+ <entry align="center"> 7.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Heterogeneous lookup for unordered containers </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0919r3.html";>
+ P0919R3
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> <code><chrono></code> <code>zero()</code>,
<code>min()</code>, and <code>max()</code> should be <code>noexcept</code>
</entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0972r0.pdf";>
+ P0972R0
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Constexpr in <code>std::pointer_traits</code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1006r1.pdf";>
+ P1006R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> <code>std::assume_aligned</code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1007r3.pdf";>
+ P1007R3
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Smart pointer creation with default initialization </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1020r1.html";>
+ P1020R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Misc constexpr bits </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1032r1.html";>
+ P1032R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Should Span be Regular? </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1085r2.md";>
+ P1085R2
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Editorial Guidance for merging P0019r8 and P0528r3 </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1123r0.html";>
+ P1123R0
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Cleaning up Clause 20 </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1148r0.pdf";>
+ P1148R0
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Make stateful allocator propagation more consistent for
<code>operator+(basic_string)</code> </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1165r1.html";>
+ P1165R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <entry> Adopt Consistent Container Erasure from Library Fundamentals 2
for C++20 </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1209r0.html";>
+ P1209R0
+ </link>
+ </entry>
+ <entry align="center"> 9.1 </entry>
+ <entry> <code>__cpp_lib_erase_if >= 201811L</code> </entry>
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Completing the Rebase of Library Fundamentals, Version 3,
Working Draft </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1210r0.html";>
+ P1210R0
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Alternative Wording for P0907R4 Signed Integers are Two's
Complement </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1236r1.html";>
+ P1236R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Remove CommonReference requirement from StrictWeakOrdering
(a.k.a Fixing Relations) </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1248r1.html";>
+ P1248R1
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#C8B0B0" ?>
+ <entry> Improving Completeness Requirements for Type Traits </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1285r0.pdf";>
+ P1285R0
+ </link>
+ </entry>
+ <entry align="center"> </entry>
+ <entry />
+ </row>
+
+ <row>
+ <?dbhtml bgcolor="#B0B0B0" ?>
+ <entry> Missing feature test macros </entry>
+ <entry>
+ <link xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1353r0.html";>
+ P1353R0
+ </link>
+ </entry>
+ <entry align="center"> Partial </entry>
+ <entry />
+ </row>
+ </tbody>
+</tgroup>
+</table>
+
+<para>
+Note 1: The changes in the proposal either do not affect the code in libstdc++,
+or the changes are not required for conformance.
+</para>
+
+
+<section xml:id="iso.2020.specific" xreflabel="Implementation
Specific"><info><title>Implementation Specific Behavior</title></info>
+
+ <para>For behaviour which is also specified by previous standards,
+ see <link linkend="iso.1998.specific">C++ 1998/2003 Implementation
+ Specific Behavior</link>, <link linkend="iso.2011.specific">C++
+ 2011 Implementation Specific Behavior</link> and <link
+ linkend="iso.2017.specific">C++ 2017 Implementation Specific
+ Behavior</link>.
+ This section only documents behaviour which is new in the 202a draft.
+ </para>
+
+
+</section>
+
+</section>
