libstdc++: Add all supported headers to lists in the manual

libstdc++-v3/ChangeLog:

	* doc/xml/manual/using.xml: Update tables of supported headers.
	* doc/html/*: Regenerate.

libstdc++-v3/doc/html/manual/using_headers.html

@@ -55,41 +55,67 @@ Unless specified otherwise below, they are also available in later modes
 (C++20 etc).
 </p><p></p><div class="table"><a id="table.cxx17_headers"></a><p class="title"><strong>Table 3.8. C++ 2017 Library Headers</strong></p><div class="table-contents"><table class="table" summary="C++ 2017 Library Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">any</code></td><td align="left"><code class="filename">charconv</code></td><td align="left"><code class="filename">execution</code></td><td align="left"><code class="filename">filesystem</code></td><td align="left"><code class="filename">memory_resource</code></td></tr><tr><td align="left"><code class="filename">optional</code></td><td align="left"><code class="filename">string_view</code></td><td align="left"><code class="filename">variant</code></td><td colspan="2" align="left"> </td></tr></tbody></table></div></div><br class="table-break" /><p>
 <a class="xref" href="using_headers.html#table.cxx20_headers" title="Table 3.9. C++ 2020 Library Headers">Table 3.9, “C++ 2020 Library Headers”</a>
-shows the C++2a include files.
+shows the C++20 include files.
-These are available in C++2a compilation
+These are available in C++20 compilation
-mode, i.e. <code class="literal">-std=c++2a</code> or <code class="literal">-std=gnu++2a</code>.
+mode, i.e. <code class="literal">-std=c++20</code> or <code class="literal">-std=gnu++20</code>.
 Including these headers in earlier modes will not result in
 compilation errors, but will not define anything.
 
-</p><p></p><div class="table"><a id="table.cxx20_headers"></a><p class="title"><strong>Table 3.9. C++ 2020 Library Headers</strong></p><div class="table-contents"><table class="table" summary="C++ 2020 Library Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /></colgroup><tbody><tr><td align="left"><code class="filename">bit</code></td><td align="left"><code class="filename">version</code></td></tr></tbody></table></div></div><br class="table-break" /><p>
+</p><p></p><div class="table"><a id="table.cxx20_headers"></a><p class="title"><strong>Table 3.9. C++ 2020 Library Headers</strong></p><div class="table-contents"><table class="table" summary="C++ 2020 Library Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">barrier</code></td><td align="left"><code class="filename">bit</code></td><td align="left"><code class="filename">charconv</code></td><td align="left"><code class="filename">compare</code></td><td align="left"><code class="filename">concepts</code></td></tr><tr><td align="left"><code class="filename">coroutine</code></td><td align="left"><code class="filename">format</code></td><td align="left"><code class="filename">latch</code></td><td align="left"><code class="filename">numbers</code></td><td align="left"><code class="filename">ranges</code></td></tr><tr><td align="left"><code class="filename">semaphore</code></td><td align="left"><code class="filename">source_location</code></td><td align="left"><code class="filename">span</code></td><td align="left"><code class="filename">stop_token</code></td><td align="left"><code class="filename">syncstream</code></td></tr><tr><td align="left"><code class="filename">version</code></td><td colspan="4" align="left"> </td></tr></tbody></table></div></div><br class="table-break" /><p>
-  The following headers have been removed in the C++2a working draft.
+  The following headers have been removed in the C++20 standard.
   They are still available when using this implementation, but in future
-  they might start to produce warnings or errors when included in C++2a mode.
+  they might start to produce warnings or errors when included in C++20 mode.
   Programs that intend to be portable should not include them.
 </p><div class="table"><a id="table.cxx20_deprheaders"></a><p class="title"><strong>Table 3.10. C++ 2020 Obsolete Headers</strong></p><div class="table-contents"><table class="table" summary="C++ 2020 Obsolete Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">ccomplex</code></td><td align="left"><code class="filename">ciso646</code></td><td align="left"><code class="filename">cstdalign</code></td><td align="left"><code class="filename">cstdbool</code></td><td align="left"><code class="filename">ctgmath</code></td></tr></tbody></table></div></div><br class="table-break" /><p>
-<a class="xref" href="using_headers.html#table.filesystemts_headers" title="Table 3.11. File System TS Header">Table 3.11, “File System TS Header”</a>,
+<a class="xref" href="using_headers.html#table.cxx23_headers" title="Table 3.11. C++ 2023 Library Headers">Table 3.11, “C++ 2023 Library Headers”</a>
+shows the C++23 include files.
+These are available in C++23 compilation
+mode, i.e. <code class="literal">-std=c++23</code> or <code class="literal">-std=gnu++23</code>.
+Including these headers in earlier modes will not result in
+compilation errors, but will not define anything.
+
+</p><p></p><div class="table"><a id="table.cxx23_headers"></a><p class="title"><strong>Table 3.11. C++ 2023 Library Headers</strong></p><div class="table-contents"><table class="table" summary="C++ 2023 Library Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">expected</code></td><td align="left"><code class="filename">generator</code></td><td align="left"><code class="filename">print</code></td><td align="left"><code class="filename">spanstream</code></td><td align="left"><code class="filename">stacktrace</code></td></tr><tr><td align="left"><code class="filename">stdatomic.h</code></td><td align="left"><code class="filename">stdfloat</code></td><td colspan="3" align="left"> </td></tr></tbody></table></div></div><br class="table-break" /><p>
+<a class="xref" href="using_headers.html#table.cxx26_headers" title="Table 3.12. C++ 2026 Library Headers">Table 3.12, “C++ 2026 Library Headers”</a>
+shows the C++26 include files.
+These are available in C++26 compilation
+mode, i.e. <code class="literal">-std=c++26</code> or <code class="literal">-std=gnu++26</code>.
+Including these headers in earlier modes will not result in
+compilation errors, but will not define anything.
+
+</p><p></p><div class="table"><a id="table.cxx26_headers"></a><p class="title"><strong>Table 3.12. C++ 2026 Library Headers</strong></p><div class="table-contents"><table class="table" summary="C++ 2026 Library Headers" border="1"><colgroup><col align="left" class="c1" /></colgroup><tbody><tr><td align="left"><code class="filename">text_encoding</code></td></tr></tbody></table></div></div><br class="table-break" /><p>
+<a class="xref" href="using_headers.html#table.filesystemts_headers" title="Table 3.13. File System TS Header">Table 3.13, “File System TS Header”</a>,
 shows the additional include file define by the
-File System Technical Specification, ISO/IEC TS 18822.
+File System Technical Specification, ISO/IEC TS 18822:2015.
 This is available in C++11 and later compilation modes.
 Including this header in earlier modes will not result in
 compilation errors, but will not define anything.
-</p><p></p><div class="table"><a id="table.filesystemts_headers"></a><p class="title"><strong>Table 3.11. File System TS Header</strong></p><div class="table-contents"><table class="table" summary="File System TS Header" border="1"><colgroup><col align="left" class="c1" /></colgroup><tbody><tr><td align="left"><code class="filename">experimental/filesystem</code></td></tr></tbody></table></div></div><br class="table-break" /><p>
+</p><p></p><div class="table"><a id="table.filesystemts_headers"></a><p class="title"><strong>Table 3.13. File System TS Header</strong></p><div class="table-contents"><table class="table" summary="File System TS Header" border="1"><colgroup><col align="left" class="c1" /></colgroup><tbody><tr><td align="left"><code class="filename">experimental/filesystem</code></td></tr></tbody></table></div></div><br class="table-break" /><p>
-<a class="xref" href="using_headers.html#table.libfundts_headers" title="Table 3.12. Library Fundamentals TS Headers">Table 3.12, “Library Fundamentals TS Headers”</a>,
+<a class="xref" href="using_headers.html#table.libfundts_headers" title="Table 3.14. Library Fundamentals TS Headers">Table 3.14, “Library Fundamentals TS Headers”</a>,
 shows the additional include files define by the C++ Extensions for
-Library Fundamentals Technical Specification, ISO/IEC TS 19568.
+Library Fundamentals Technical Specification, ISO/IEC TS 19568:2015,
+ISO/IEC TS 19568:2017, and ISO/IEC TS 19568:2024.
+These are available in C++14 and later compilation modes, except for
+<code class="filename">&lt;experimental/scope&gt;</code>
+which is available in C++20 and later compilation modes.
+Including these headers in earlier modes will not result in
+compilation errors, but will not define anything.
+</p><p></p><div class="table"><a id="table.libfundts_headers"></a><p class="title"><strong>Table 3.14. Library Fundamentals TS Headers</strong></p><div class="table-contents"><table class="table" summary="Library Fundamentals TS Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">experimental/algorithm</code></td><td align="left"><code class="filename">experimental/any</code></td><td align="left"><code class="filename">experimental/array</code></td><td align="left"><code class="filename">experimental/chrono</code></td><td align="left"><code class="filename">experimental/deque</code></td></tr><tr><td align="left"><code class="filename">experimental/forward_list</code></td><td align="left"><code class="filename">experimental/functional</code></td><td align="left"><code class="filename">experimental/iterator</code></td><td align="left"><code class="filename">experimental/list</code></td><td align="left"><code class="filename">experimental/map</code></td></tr><tr><td align="left"><code class="filename">experimental/memory</code></td><td align="left"><code class="filename">experimental/memory_resource</code></td><td align="left"><code class="filename">experimental/numeric</code></td><td align="left"><code class="filename">experimental/optional</code></td><td align="left"><code class="filename">experimental/propagate_const</code></td></tr><tr><td align="left"><code class="filename">experimental/random</code></td><td align="left"><code class="filename">experimental/ratio</code></td><td align="left"><code class="filename">experimental/regex</code></td><td align="left"><code class="filename">experimental/scope</code></td><td align="left"><code class="filename">experimental/set</code></td></tr><tr><td align="left"><code class="filename">experimental/source_location</code></td><td align="left"><code class="filename">experimental/string</code></td><td align="left"><code class="filename">experimental/string_view</code></td><td align="left"><code class="filename">experimental/system_error</code></td><td align="left"><code class="filename">experimental/tuple</code></td></tr><tr><td align="left"><code class="filename">experimental/type_traits</code></td><td align="left"><code class="filename">experimental/unordered_map</code></td><td align="left"><code class="filename">experimental/unordered_set</code></td><td align="left"><code class="filename">experimental/utility</code></td><td align="left"><code class="filename">experimental/vector</code></td></tr></tbody></table></div></div><br class="table-break" /><p>
+<a class="xref" href="using_headers.html#table.networkingts_headers" title="Table 3.15. Networking TS Headers">Table 3.15, “Networking TS Headers”</a>,
+shows the additional include files define by the
+Networking Technical Specification, ISO/IEC TS 19216:2018.
 These are available in C++14 and later compilation modes.
 Including these headers in earlier modes will not result in
 compilation errors, but will not define anything.
-</p><p></p><div class="table"><a id="table.libfundts_headers"></a><p class="title"><strong>Table 3.12. Library Fundamentals TS Headers</strong></p><div class="table-contents"><table class="table" summary="Library Fundamentals TS Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">experimental/algorithm</code></td><td align="left"><code class="filename">experimental/any</code></td><td align="left"><code class="filename">experimental/array</code></td><td align="left"><code class="filename">experimental/chrono</code></td><td align="left"><code class="filename">experimental/deque</code></td></tr><tr><td align="left"><code class="filename">experimental/forward_list</code></td><td align="left"><code class="filename">experimental/functional</code></td><td align="left"><code class="filename">experimental/iterator</code></td><td align="left"><code class="filename">experimental/list</code></td><td align="left"><code class="filename">experimental/map</code></td></tr><tr><td align="left"><code class="filename">experimental/memory</code></td><td align="left"><code class="filename">experimental/memory_resource</code></td><td align="left"><code class="filename">experimental/numeric</code></td><td align="left"><code class="filename">experimental/optional</code></td><td align="left"><code class="filename">experimental/propagate_const</code></td></tr><tr><td align="left"><code class="filename">experimental/random</code></td><td align="left"><code class="filename">experimental/ratio</code></td><td align="left"><code class="filename">experimental/regex</code></td><td align="left"><code class="filename">experimental/set</code></td><td align="left"><code class="filename">experimental/source_location</code></td></tr><tr><td align="left"><code class="filename">experimental/string</code></td><td align="left"><code class="filename">experimental/string_view</code></td><td align="left"><code class="filename">experimental/system_error</code></td><td align="left"><code class="filename">experimental/tuple</code></td><td align="left"><code class="filename">experimental/type_traits</code></td></tr><tr><td align="left"><code class="filename">experimental/unordered_map</code></td><td align="left"><code class="filename">experimental/unordered_set</code></td><td align="left"><code class="filename">experimental/utility</code></td><td align="left"><code class="filename">experimental/vector</code></td><td align="left"> </td></tr></tbody></table></div></div><br class="table-break" /><p>
+</p><p></p><div class="table"><a id="table.networkingts_headers"></a><p class="title"><strong>Table 3.15. Networking TS Headers</strong></p><div class="table-contents"><table class="table" summary="Networking TS Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /></colgroup><tbody><tr><td align="left"><code class="filename">experimental/buffer</code></td><td align="left"><code class="filename">experimental/executor</code></td><td align="left"><code class="filename">experimental/internet</code></td><td align="left"><code class="filename">experimental/io_context</code></td></tr><tr><td align="left"><code class="filename">experimental/net</code></td><td align="left"><code class="filename">experimental/netfwd</code></td><td align="left"><code class="filename">experimental/socket</code></td><td align="left"><code class="filename">experimental/timer</code></td></tr></tbody></table></div></div><br class="table-break" /><p>
   In addition, TR1 includes as:
-</p><div class="table"><a id="table.tr1_headers"></a><p class="title"><strong>Table 3.13. C++ TR 1 Library Headers</strong></p><div class="table-contents"><table class="table" summary="C++ TR 1 Library Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">tr1/array</code></td><td align="left"><code class="filename">tr1/complex</code></td><td align="left"><code class="filename">tr1/memory</code></td><td align="left"><code class="filename">tr1/functional</code></td><td align="left"><code class="filename">tr1/random</code></td></tr><tr><td align="left"><code class="filename">tr1/regex</code></td><td align="left"><code class="filename">tr1/tuple</code></td><td align="left"><code class="filename">tr1/type_traits</code></td><td align="left"><code class="filename">tr1/unordered_map</code></td><td align="left"><code class="filename">tr1/unordered_set</code></td></tr><tr><td align="left"><code class="filename">tr1/utility</code></td><td colspan="4" align="left"> </td></tr></tbody></table></div></div><br class="table-break" /><p></p><div class="table"><a id="table.tr1_cheaders"></a><p class="title"><strong>Table 3.14. C++ TR 1 Library Headers for C Library Facilities</strong></p><div class="table-contents"><table class="table" summary="C++ TR 1 Library Headers for C Library Facilities" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">tr1/ccomplex</code></td><td align="left"><code class="filename">tr1/cfenv</code></td><td align="left"><code class="filename">tr1/cfloat</code></td><td align="left"><code class="filename">tr1/cmath</code></td><td align="left"><code class="filename">tr1/cinttypes</code></td></tr><tr><td align="left"><code class="filename">tr1/climits</code></td><td align="left"><code class="filename">tr1/cstdarg</code></td><td align="left"><code class="filename">tr1/cstdbool</code></td><td align="left"><code class="filename">tr1/cstdint</code></td><td align="left"><code class="filename">tr1/cstdio</code></td></tr><tr><td align="left"><code class="filename">tr1/cstdlib</code></td><td align="left"><code class="filename">tr1/ctgmath</code></td><td align="left"><code class="filename">tr1/ctime</code></td><td align="left"><code class="filename">tr1/cwchar</code></td><td align="left"><code class="filename">tr1/cwctype</code></td></tr></tbody></table></div></div><br class="table-break" /><p>Decimal floating-point arithmetic is available if the C++
+</p><div class="table"><a id="table.tr1_headers"></a><p class="title"><strong>Table 3.16. C++ TR 1 Library Headers</strong></p><div class="table-contents"><table class="table" summary="C++ TR 1 Library Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">tr1/array</code></td><td align="left"><code class="filename">tr1/complex</code></td><td align="left"><code class="filename">tr1/memory</code></td><td align="left"><code class="filename">tr1/functional</code></td><td align="left"><code class="filename">tr1/random</code></td></tr><tr><td align="left"><code class="filename">tr1/regex</code></td><td align="left"><code class="filename">tr1/tuple</code></td><td align="left"><code class="filename">tr1/type_traits</code></td><td align="left"><code class="filename">tr1/unordered_map</code></td><td align="left"><code class="filename">tr1/unordered_set</code></td></tr><tr><td align="left"><code class="filename">tr1/utility</code></td><td colspan="4" align="left"> </td></tr></tbody></table></div></div><br class="table-break" /><p></p><div class="table"><a id="table.tr1_cheaders"></a><p class="title"><strong>Table 3.17. C++ TR 1 Library Headers for C Library Facilities</strong></p><div class="table-contents"><table class="table" summary="C++ TR 1 Library Headers for C Library Facilities" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">tr1/ccomplex</code></td><td align="left"><code class="filename">tr1/cfenv</code></td><td align="left"><code class="filename">tr1/cfloat</code></td><td align="left"><code class="filename">tr1/cmath</code></td><td align="left"><code class="filename">tr1/cinttypes</code></td></tr><tr><td align="left"><code class="filename">tr1/climits</code></td><td align="left"><code class="filename">tr1/cstdarg</code></td><td align="left"><code class="filename">tr1/cstdbool</code></td><td align="left"><code class="filename">tr1/cstdint</code></td><td align="left"><code class="filename">tr1/cstdio</code></td></tr><tr><td align="left"><code class="filename">tr1/cstdlib</code></td><td align="left"><code class="filename">tr1/ctgmath</code></td><td align="left"><code class="filename">tr1/ctime</code></td><td align="left"><code class="filename">tr1/cwchar</code></td><td align="left"><code class="filename">tr1/cwctype</code></td></tr></tbody></table></div></div><br class="table-break" /><p>Decimal floating-point arithmetic is available if the C++
 compiler supports scalar decimal floating-point types defined via
 <code class="code">__attribute__((mode(SD|DD|LD)))</code>.
-</p><div class="table"><a id="table.decfp_headers"></a><p class="title"><strong>Table 3.15. C++ TR 24733 Decimal Floating-Point Header</strong></p><div class="table-contents"><table class="table" summary="C++ TR 24733 Decimal Floating-Point Header" border="1"><colgroup><col align="left" class="c1" /></colgroup><tbody><tr><td align="left"><code class="filename">decimal/decimal</code></td></tr></tbody></table></div></div><br class="table-break" /><p>
+</p><div class="table"><a id="table.decfp_headers"></a><p class="title"><strong>Table 3.18. C++ TR 24733 Decimal Floating-Point Header</strong></p><div class="table-contents"><table class="table" summary="C++ TR 24733 Decimal Floating-Point Header" border="1"><colgroup><col align="left" class="c1" /></colgroup><tbody><tr><td align="left"><code class="filename">decimal/decimal</code></td></tr></tbody></table></div></div><br class="table-break" /><p>
   Also included are files for the C++ ABI interface:
-</p><div class="table"><a id="table.abi_headers"></a><p class="title"><strong>Table 3.16. C++ ABI Headers</strong></p><div class="table-contents"><table class="table" summary="C++ ABI Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /></colgroup><tbody><tr><td align="left"><code class="filename">cxxabi.h</code></td><td align="left"><code class="filename">cxxabi_forced.h</code></td></tr></tbody></table></div></div><br class="table-break" /><p>
+</p><div class="table"><a id="table.abi_headers"></a><p class="title"><strong>Table 3.19. C++ ABI Headers</strong></p><div class="table-contents"><table class="table" summary="C++ ABI Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /></colgroup><tbody><tr><td align="left"><code class="filename">cxxabi.h</code></td><td align="left"><code class="filename">cxxabi_forced.h</code></td></tr></tbody></table></div></div><br class="table-break" /><p>
   And a large variety of extensions.
-</p><div class="table"><a id="table.ext_headers"></a><p class="title"><strong>Table 3.17. Extension Headers</strong></p><div class="table-contents"><table class="table" summary="Extension Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">ext/algorithm</code></td><td align="left"><code class="filename">ext/atomicity.h</code></td><td align="left"><code class="filename">ext/bitmap_allocator.h</code></td><td align="left"><code class="filename">ext/cast.h</code></td><td class="auto-generated"> </td></tr><tr><td align="left"><code class="filename">ext/codecvt_specializations.h</code></td><td align="left"><code class="filename">ext/concurrence.h</code></td><td align="left"><code class="filename">ext/debug_allocator.h</code></td><td align="left"><code class="filename">ext/enc_filebuf.h</code></td><td align="left"><code class="filename">ext/extptr_allocator.h</code></td></tr><tr><td align="left"><code class="filename">ext/functional</code></td><td align="left"><code class="filename">ext/iterator</code></td><td align="left"><code class="filename">ext/malloc_allocator.h</code></td><td align="left"><code class="filename">ext/memory</code></td><td align="left"><code class="filename">ext/mt_allocator.h</code></td></tr><tr><td align="left"><code class="filename">ext/new_allocator.h</code></td><td align="left"><code class="filename">ext/numeric</code></td><td align="left"><code class="filename">ext/numeric_traits.h</code></td><td align="left"><code class="filename">ext/pb_ds/assoc_container.h</code></td><td align="left"><code class="filename">ext/pb_ds/priority_queue.h</code></td></tr><tr><td align="left"><code class="filename">ext/pod_char_traits.h</code></td><td align="left"><code class="filename">ext/pool_allocator.h</code></td><td align="left"><code class="filename">ext/rb_tree</code></td><td align="left"><code class="filename">ext/rope</code></td><td align="left"><code class="filename">ext/slist</code></td></tr><tr><td align="left"><code class="filename">ext/stdio_filebuf.h</code></td><td align="left"><code class="filename">ext/stdio_sync_filebuf.h</code></td><td align="left"><code class="filename">ext/throw_allocator.h</code></td><td align="left"><code class="filename">ext/typelist.h</code></td><td align="left"><code class="filename">ext/type_traits.h</code></td></tr><tr><td align="left"><code class="filename">ext/vstring.h</code></td><td colspan="4" align="left"> </td></tr></tbody></table></div></div><br class="table-break" /><p></p><div class="table"><a id="table.debug_headers"></a><p class="title"><strong>Table 3.18. Extension Debug Headers</strong></p><div class="table-contents"><table class="table" summary="Extension Debug Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">debug/array</code></td><td align="left"><code class="filename">debug/bitset</code></td><td align="left"><code class="filename">debug/deque</code></td><td align="left"><code class="filename">debug/forward_list</code></td><td align="left"><code class="filename">debug/list</code></td></tr><tr><td align="left"><code class="filename">debug/map</code></td><td align="left"><code class="filename">debug/set</code></td><td align="left"><code class="filename">debug/string</code></td><td align="left"><code class="filename">debug/unordered_map</code></td><td align="left"><code class="filename">debug/unordered_set</code></td></tr><tr><td align="left"><code class="filename">debug/vector</code></td><td colspan="4" align="left"> </td></tr></tbody></table></div></div><br class="table-break" /><p></p><div class="table"><a id="table.parallel_headers"></a><p class="title"><strong>Table 3.19. Extension Parallel Headers</strong></p><div class="table-contents"><table class="table" summary="Extension Parallel Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /></colgroup><tbody><tr><td align="left"><code class="filename">parallel/algorithm</code></td><td align="left"><code class="filename">parallel/numeric</code></td></tr></tbody></table></div></div><br class="table-break" /></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="manual.intro.using.headers.mixing"></a>Mixing Headers</h3></div></div></div><p> A few simple rules.
+</p><div class="table"><a id="table.ext_headers"></a><p class="title"><strong>Table 3.20. Extension Headers</strong></p><div class="table-contents"><table class="table" summary="Extension Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">ext/algorithm</code></td><td align="left"><code class="filename">ext/atomicity.h</code></td><td align="left"><code class="filename">ext/bitmap_allocator.h</code></td><td align="left"><code class="filename">ext/cast.h</code></td><td class="auto-generated"> </td></tr><tr><td align="left"><code class="filename">ext/codecvt_specializations.h</code></td><td align="left"><code class="filename">ext/concurrence.h</code></td><td align="left"><code class="filename">ext/debug_allocator.h</code></td><td align="left"><code class="filename">ext/enc_filebuf.h</code></td><td align="left"><code class="filename">ext/extptr_allocator.h</code></td></tr><tr><td align="left"><code class="filename">ext/functional</code></td><td align="left"><code class="filename">ext/iterator</code></td><td align="left"><code class="filename">ext/malloc_allocator.h</code></td><td align="left"><code class="filename">ext/memory</code></td><td align="left"><code class="filename">ext/mt_allocator.h</code></td></tr><tr><td align="left"><code class="filename">ext/new_allocator.h</code></td><td align="left"><code class="filename">ext/numeric</code></td><td align="left"><code class="filename">ext/numeric_traits.h</code></td><td align="left"><code class="filename">ext/pb_ds/assoc_container.h</code></td><td align="left"><code class="filename">ext/pb_ds/priority_queue.h</code></td></tr><tr><td align="left"><code class="filename">ext/pod_char_traits.h</code></td><td align="left"><code class="filename">ext/pool_allocator.h</code></td><td align="left"><code class="filename">ext/rb_tree</code></td><td align="left"><code class="filename">ext/rope</code></td><td align="left"><code class="filename">ext/slist</code></td></tr><tr><td align="left"><code class="filename">ext/stdio_filebuf.h</code></td><td align="left"><code class="filename">ext/stdio_sync_filebuf.h</code></td><td align="left"><code class="filename">ext/throw_allocator.h</code></td><td align="left"><code class="filename">ext/typelist.h</code></td><td align="left"><code class="filename">ext/type_traits.h</code></td></tr><tr><td align="left"><code class="filename">ext/vstring.h</code></td><td colspan="4" align="left"> </td></tr></tbody></table></div></div><br class="table-break" /><p></p><div class="table"><a id="table.debug_headers"></a><p class="title"><strong>Table 3.21. Extension Debug Headers</strong></p><div class="table-contents"><table class="table" summary="Extension Debug Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /><col align="left" class="c3" /><col align="left" class="c4" /><col align="left" class="c5" /></colgroup><tbody><tr><td align="left"><code class="filename">debug/array</code></td><td align="left"><code class="filename">debug/bitset</code></td><td align="left"><code class="filename">debug/deque</code></td><td align="left"><code class="filename">debug/forward_list</code></td><td align="left"><code class="filename">debug/list</code></td></tr><tr><td align="left"><code class="filename">debug/map</code></td><td align="left"><code class="filename">debug/set</code></td><td align="left"><code class="filename">debug/string</code></td><td align="left"><code class="filename">debug/unordered_map</code></td><td align="left"><code class="filename">debug/unordered_set</code></td></tr><tr><td align="left"><code class="filename">debug/vector</code></td><td colspan="4" align="left"> </td></tr></tbody></table></div></div><br class="table-break" /><p></p><div class="table"><a id="table.parallel_headers"></a><p class="title"><strong>Table 3.22. Extension Parallel Headers</strong></p><div class="table-contents"><table class="table" summary="Extension Parallel Headers" border="1"><colgroup><col align="left" class="c1" /><col align="left" class="c2" /></colgroup><tbody><tr><td align="left"><code class="filename">parallel/algorithm</code></td><td align="left"><code class="filename">parallel/numeric</code></td></tr></tbody></table></div></div><br class="table-break" /></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="manual.intro.using.headers.mixing"></a>Mixing Headers</h3></div></div></div><p> A few simple rules.
 </p><p>First, mixing different dialects of the standard headers is not
 possible. It's an all-or-nothing affair. Thus, code like
 </p><pre class="programlisting">

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

@@ -468,9 +468,9 @@ Unless specified otherwise below, they are also available in later modes
 
 <para>
 <xref linkend="table.cxx20_headers"/>
-shows the C++2a include files.
+shows the C++20 include files.
-These are available in C++2a compilation
+These are available in C++20 compilation
-mode, i.e. <literal>-std=c++2a</literal> or <literal>-std=gnu++2a</literal>.
+mode, i.e. <literal>-std=c++20</literal> or <literal>-std=gnu++20</literal>.
 Including these headers in earlier modes will not result in
 compilation errors, but will not define anything.
 <!--
@@ -483,28 +483,46 @@ Unless specified otherwise below, they are also available in later modes
 <table frame="all" xml:id="table.cxx20_headers">
 <title>C++ 2020 Library Headers</title>
 
-<tgroup cols="2" align="left" colsep="1" rowsep="1">
+<tgroup cols="5" align="left" colsep="1" rowsep="1">
 <colspec colname="c1"/>
 <colspec colname="c2"/>
-<!--
 <colspec colname="c3"/>
 <colspec colname="c4"/>
 <colspec colname="c5"/>
--->
 <tbody>
 <row>
+<entry><filename class="headerfile">barrier</filename></entry>
 <entry><filename class="headerfile">bit</filename></entry>
-<entry><filename class="headerfile">version</filename></entry>
+<entry><filename class="headerfile">charconv</filename></entry>
+<entry><filename class="headerfile">compare</filename></entry>
+<entry><filename class="headerfile">concepts</filename></entry>
+</row>
+<row>
+<entry><filename class="headerfile">coroutine</filename></entry>
+<entry><filename class="headerfile">format</filename></entry>
+<entry><filename class="headerfile">latch</filename></entry>
+<entry><filename class="headerfile">numbers</filename></entry>
+<entry><filename class="headerfile">ranges</filename></entry>
+</row>
+<row>
+<entry><filename class="headerfile">semaphore</filename></entry>
+<entry><filename class="headerfile">source_location</filename></entry>
+<entry><filename class="headerfile">span</filename></entry>
+<entry><filename class="headerfile">stop_token</filename></entry>
+<entry><filename class="headerfile">syncstream</filename></entry>
+</row>
+<row>
+<entry><filename class="headerfile">version</filename></entry>
+<entry namest="c2" nameend="c5"/>
 </row>
-<!-- TODO compare, concepts, contract, span, syncstream -->
 </tbody>
 </tgroup>
 </table>
 
 <para>
-  The following headers have been removed in the C++2a working draft.
+  The following headers have been removed in the C++20 standard.
   They are still available when using this implementation, but in future
-  they might start to produce warnings or errors when included in C++2a mode.
+  they might start to produce warnings or errors when included in C++20 mode.
   Programs that intend to be portable should not include them.
 </para>
 
@@ -529,10 +547,86 @@ Unless specified otherwise below, they are also available in later modes
 </tgroup>
 </table>
 
+<para>
+<xref linkend="table.cxx23_headers"/>
+shows the C++23 include files.
+These are available in C++23 compilation
+mode, i.e. <literal>-std=c++23</literal> or <literal>-std=gnu++23</literal>.
+Including these headers in earlier modes will not result in
+compilation errors, but will not define anything.
+<!--
+Unless specified otherwise below, they are also available in later modes
+(C++26 etc).
+-->
+</para>
+
+<para/>
+<table frame="all" xml:id="table.cxx23_headers">
+<title>C++ 2023 Library Headers</title>
+
+<tgroup cols="5" align="left" colsep="1" rowsep="1">
+<colspec colname="c1"/>
+<colspec colname="c2"/>
+<colspec colname="c3"/>
+<colspec colname="c4"/>
+<colspec colname="c5"/>
+<tbody>
+<row>
+<entry><filename class="headerfile">expected</filename></entry>
+<entry><filename class="headerfile">generator</filename></entry>
+<entry><filename class="headerfile">print</filename></entry>
+<entry><filename class="headerfile">spanstream</filename></entry>
+<entry><filename class="headerfile">stacktrace</filename></entry>
+</row>
+<row>
+<entry><filename class="headerfile">stdatomic.h</filename></entry>
+<entry><filename class="headerfile">stdfloat</filename></entry>
+<entry namest="c3" nameend="c5"/>
+<!-- TODO flat_map, flat_set, mdspan -->
+</row>
+</tbody>
+</tgroup>
+</table>
+
+<para>
+<xref linkend="table.cxx26_headers"/>
+shows the C++26 include files.
+These are available in C++26 compilation
+mode, i.e. <literal>-std=c++26</literal> or <literal>-std=gnu++26</literal>.
+Including these headers in earlier modes will not result in
+compilation errors, but will not define anything.
+<!--
+Unless specified otherwise below, they are also available in later modes
+(C++2d etc).
+-->
+</para>
+
+<para/>
+<table frame="all" xml:id="table.cxx26_headers">
+<title>C++ 2026 Library Headers</title>
+
+<tgroup cols="1" align="left" colsep="1" rowsep="1">
+<colspec colname="c1"/>
+<!--
+<colspec colname="c2"/>
+<colspec colname="c3"/>
+<colspec colname="c4"/>
+<colspec colname="c5"/>
+-->
+<tbody>
+<row>
+<entry><filename class="headerfile">text_encoding</filename></entry>
+<!-- TODO debugging, hazard_pointer, linalg, rcu -->
+</row>
+</tbody>
+</tgroup>
+</table>
+
+
 <para>
 <xref linkend="table.filesystemts_headers"/>,
 shows the additional include file define by the
-File System Technical Specification, ISO/IEC TS 18822.
+File System Technical Specification, ISO/IEC TS 18822:2015.
 This is available in C++11 and later compilation modes.
 Including this header in earlier modes will not result in
 compilation errors, but will not define anything.
@@ -556,8 +650,11 @@ compilation errors, but will not define anything.
 <para>
 <xref linkend="table.libfundts_headers"/>,
 shows the additional include files define by the C++ Extensions for
-Library Fundamentals Technical Specification, ISO/IEC TS 19568.
+Library Fundamentals Technical Specification, ISO/IEC TS 19568:2015,
-These are available in C++14 and later compilation modes.
+ISO/IEC TS 19568:2017, and ISO/IEC TS 19568:2024.
+These are available in C++14 and later compilation modes, except for
+<filename class="headerfile">&lt;experimental/scope&gt;</filename>
+which is available in C++20 and later compilation modes.
 Including these headers in earlier modes will not result in
 compilation errors, but will not define anything.
 </para>
@@ -598,22 +695,58 @@ compilation errors, but will not define anything.
 <entry><filename class="headerfile">experimental/random</filename></entry>
 <entry><filename class="headerfile">experimental/ratio</filename></entry>
 <entry><filename class="headerfile">experimental/regex</filename></entry>
+<entry><filename class="headerfile">experimental/scope</filename></entry>
 <entry><filename class="headerfile">experimental/set</filename></entry>
-<entry><filename class="headerfile">experimental/source_location</filename></entry>
 </row>
 <row>
+<entry><filename class="headerfile">experimental/source_location</filename></entry>
 <entry><filename class="headerfile">experimental/string</filename></entry>
 <entry><filename class="headerfile">experimental/string_view</filename></entry>
 <entry><filename class="headerfile">experimental/system_error</filename></entry>
 <entry><filename class="headerfile">experimental/tuple</filename></entry>
-<entry><filename class="headerfile">experimental/type_traits</filename></entry>
 </row>
 <row>
+<entry><filename class="headerfile">experimental/type_traits</filename></entry>
 <entry><filename class="headerfile">experimental/unordered_map</filename></entry>
 <entry><filename class="headerfile">experimental/unordered_set</filename></entry>
 <entry><filename class="headerfile">experimental/utility</filename></entry>
 <entry><filename class="headerfile">experimental/vector</filename></entry>
-<entry />
+</row>
+</tbody>
+</tgroup>
+</table>
+
+
+<para>
+<xref linkend="table.networkingts_headers"/>,
+shows the additional include files define by the
+Networking Technical Specification, ISO/IEC TS 19216:2018.
+These are available in C++14 and later compilation modes.
+Including these headers in earlier modes will not result in
+compilation errors, but will not define anything.
+</para>
+
+<para/>
+<table frame="all" xml:id="table.networkingts_headers">
+<title>Networking TS Headers</title>
+
+<tgroup cols="4" align="left" colsep="1" rowsep="1">
+<colspec colname="c1"/>
+<colspec colname="c2"/>
+<colspec colname="c3"/>
+<colspec colname="c4"/>
+<tbody>
+<row>
+<entry><filename class="headerfile">experimental/buffer</filename></entry>
+<entry><filename class="headerfile">experimental/executor</filename></entry>
+<entry><filename class="headerfile">experimental/internet</filename></entry>
+<entry><filename class="headerfile">experimental/io_context</filename></entry>
+</row>
+<row>
+<entry><filename class="headerfile">experimental/net</filename></entry>
+<entry><filename class="headerfile">experimental/netfwd</filename></entry>
+<entry><filename class="headerfile">experimental/socket</filename></entry>
+<entry><filename class="headerfile">experimental/timer</filename></entry>
 </row>
 </tbody>
 </tgroup>