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<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:boostbook="urn:boost-org:boostbook" xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
<generator>Boost Website Site Tools</generator>
<title>Release notes for work in progress boost</title>
<link>https://www.boost.org/</link>
<atom:link href="https://www.boost.org/generated/dev.rss" rel="self" type="application/rss+xml" />
<description></description>
<language>en-us</language>
<copyright>Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or https://www.boost.org/LICENSE_1_0.txt)</copyright>
<item><title>Version 1.82.0</title><link>https://www.boost.org/users/history/version_1_82_0.html</link><guid>https://www.boost.org/users/history/version_1_82_0.html</guid><pubDate>Fri, 14 Apr 2023 03:08:20 +0000</pubDate><description>
&lt;div id="version_1_82_0.known_issues"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Known Issues&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
These are patches from library authors which were found too late to be fixed
in the release.
&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Filesystem
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Compilation on OpenBSD may fail because of broken support for &lt;code&gt;&lt;span class="special"&gt;-&lt;/span&gt;&lt;span class="identifier"&gt;Wl&lt;/span&gt;&lt;span class="special"&gt;,--&lt;/span&gt;&lt;span class="identifier"&gt;no&lt;/span&gt;&lt;span class="special"&gt;-&lt;/span&gt;&lt;span class="identifier"&gt;undefined&lt;/span&gt;&lt;/code&gt;
compiler flag for shared libraries on this platform, see &lt;a href="https://github.com/boostorg/filesystem/issues/283"&gt;#283&lt;/a&gt;.
&lt;a href="https://www.boost.org/patches/1_82_0/0001-filesystem-fix-openbsd-build.patch"&gt;Patch&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, creating directory iterators over directories in SMBv1
shares may fail with &lt;code&gt;&lt;span class="identifier"&gt;ERROR_INVALID_LEVEL&lt;/span&gt;&lt;/code&gt;
error code, see &lt;a href="https://github.com/boostorg/filesystem/issues/284"&gt;#284&lt;/a&gt;. &lt;a href="https://www.boost.org/patches/1_82_0/0002-filesystem-fix-win-smbv1-dir-iterator.patch"&gt;Patch&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_82_0.notice_of_dropping_c_03_support"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Notice
of Dropping C++03 Support&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
The following libraries will be dropping C++03 support in release 1.84, two
releases from now:
&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Align
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Any
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Asio
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Atomic
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Bind
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Chrono
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
ContainerHash
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Conversion
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
DLL
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Endian
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Filesystem
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Function
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Functional
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Io
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
LexicalCast
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Log
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Random
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Ratio
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
SmartPtr
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
System
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Stacktrace
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Thread
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Timer
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
TypeIndex
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Typeof
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Unordered
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Variant
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;
This release (1.82) and the next (1.83) will be the last releases offering
C++03 support for the above libraries and most of their dependencies.
&lt;/p&gt;
&lt;p&gt;
The new baseline requirement for the above libraries, and for most of Boost,
will be C++11. Since old compiler versions often implement C++11 only partially,
due to missing support or bugs, what compilers are considered to meet the C++11
requirement may vary by library.
&lt;/p&gt;
&lt;p&gt;
However, a general rule is that if a compiler does not recognize a C++11 keyword
or syntax at all (e.g. use of &lt;code&gt;&lt;span class="keyword"&gt;noexcept&lt;/span&gt;&lt;/code&gt;,
use of &lt;code&gt;&lt;span class="keyword"&gt;constexpr&lt;/span&gt;&lt;/code&gt;, or defining
a &lt;code&gt;&lt;span class="special"&gt;=&lt;/span&gt;&lt;span class="keyword"&gt;delete&lt;/span&gt;&lt;/code&gt;d
function results in an immediate compile error), or if a compiler does not
provide a required C++11 header at all (e.g. trying to include &lt;code&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;atomic&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt; or &lt;code&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;chrono&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;
fails), or the compiler provides a C++11 feature or a header that is completely
unusable, this compiler is not considered a C++11 compiler.
&lt;/p&gt;
&lt;p&gt;
This rules out, for instance, Microsoft Visual C++ before 14.0, or GCC before
4.8.
&lt;/p&gt;
&lt;/div&gt;
&lt;div id="version_1_82_0.new_libraries"&gt;
&lt;h3&gt;&lt;span class="link"&gt;New Libraries&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/mysql/"&gt;Mysql&lt;/a&gt;:&lt;/span&gt; a C++11 client for the MySQL
database server, based on Boost.Asio, from Ruben Perez.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_82_0.updated_libraries"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Updated Libraries&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/any/"&gt;Any&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Now uses &lt;code&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;enable_if&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt; header instead of the deprecated
&lt;code&gt;&lt;span class="identifier"&gt;utility&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;enable_if&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;. Thanks to Michael Ford for
the PR &lt;a href="https://github.com/boostorg/any/pull/25"&gt;PR#25&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/asio/"&gt;Asio&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added the ability to customise the execution of a completion handler
when an operation completes immediately.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added user-defined literals for buffer types.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a new protocol type &lt;code&gt;&lt;span class="identifier"&gt;local&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;seq_packet_protocol&lt;/span&gt;&lt;/code&gt;
to represent &lt;code&gt;&lt;span class="identifier"&gt;AF_UNIX&lt;/span&gt;&lt;/code&gt;
with &lt;code&gt;&lt;span class="identifier"&gt;SOCK_SEQPACKET&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Exposed &lt;code&gt;&lt;span class="identifier"&gt;sigaction&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; flags via an optional argument
to &lt;code&gt;&lt;span class="identifier"&gt;signal_set&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;add&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Change &lt;code&gt;&lt;span class="identifier"&gt;allocator_binder&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;executor_binder&lt;/span&gt;&lt;/code&gt;,
and &lt;code&gt;&lt;span class="identifier"&gt;cancellation_slot_binder&lt;/span&gt;&lt;/code&gt;
to support detection of unspecialised associators.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed ambiguity in &lt;code&gt;&lt;span class="identifier"&gt;associated_cancellation_slot&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;reference_wrapper&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;::&lt;/span&gt;&lt;span class="identifier"&gt;get&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;awaitable&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;&lt;/span&gt;&lt;/code&gt;
handling for completion signatures containing &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;exception_ptr&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;channel&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;&lt;/span&gt;&lt;/code&gt; &lt;code&gt;&lt;span class="identifier"&gt;try_send&lt;/span&gt;&lt;/code&gt;
failure after a &lt;code&gt;&lt;span class="identifier"&gt;cancel&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;thread_pool&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;join&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; deadlock when the pool has no internal
threads.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed pipe &lt;code&gt;&lt;span class="identifier"&gt;release&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; when using &lt;tt&gt;io_uring&lt;/tt&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed data initialisation and cleanup issues in the &lt;tt&gt;io_uring&lt;/tt&gt;
backend.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed a dangling reference issue in the execution context overload
of &lt;code&gt;&lt;span class="identifier"&gt;get_associated_executor&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Ensured buffered messages can still be received when an &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;channel&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;&lt;/span&gt;&lt;/code&gt;
is closed.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed the &lt;code&gt;&lt;span class="identifier"&gt;any_completion_handler&lt;/span&gt;&lt;/code&gt;
assignment operator.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Constrained the constructor of &lt;code&gt;&lt;span class="identifier"&gt;any_completion_handler&lt;/span&gt;&lt;/code&gt;
to prevent accidental copying
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed to use &lt;code&gt;&lt;span class="identifier"&gt;uint64_t&lt;/span&gt;&lt;/code&gt;
for OpenSSL options, to match OpenSSL 3.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;deferred&lt;/span&gt;&lt;/code&gt; interoperability
with multiple completion signatures.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed channels to add partial support for C++11 and C++14.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added missing handler tracking source location support to &lt;code&gt;&lt;span class="identifier"&gt;co_composed&lt;/span&gt;&lt;/code&gt; and 'awaitable&amp;lt;&amp;gt;'
coroutines, when awaiting packaged asynchronous operations.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed some 'potential null dereference' and shadow variable warnings.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed a &lt;code&gt;&lt;span class="identifier"&gt;asio&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;buffer&lt;/span&gt;&lt;/code&gt; overload selection when
used with &lt;code&gt;&lt;span class="identifier"&gt;const_buffers_1&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;mutable_buffers_1&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Disabled the runtime check for current Windows version unless targeting
older Windows.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compatibility between buffered stream wrappers and move-constructible
streams, such as &lt;code&gt;&lt;span class="identifier"&gt;ssl&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;stream&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;basic_socket_acceptor&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;async_accept&lt;/span&gt;&lt;/code&gt;
compatibility with lambdas that have a deduced return type.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;as_tuple&lt;/span&gt;&lt;/code&gt; compatibility
with legacy completion tokens.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;redirect_error&lt;/span&gt;&lt;/code&gt;
compatibility with new completion tokens.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed a potential, Windows-specific program termination due to exceptions
that should have been allowed to escape from a destructor.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Prevented inadvertent &lt;code&gt;&lt;span class="identifier"&gt;co_await&lt;/span&gt;&lt;/code&gt;
of boolean expressions.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed result handling and support for custom allocators in &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;use_coro&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed variadic template emulation for &lt;code&gt;&lt;span class="identifier"&gt;is_async_operation&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;completion_signature_of&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed incorrect reuse of a moved-from result in &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;promise&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;coro&lt;/span&gt;&lt;/code&gt;
use with custom allocators.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;seek_cur&lt;/span&gt;&lt;/code&gt; behaviour
with stream-oriented files on Windows.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Various additions and modifications to the documentation.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Consult the &lt;a href="https://www.boost.org/doc/libs/1_82_0/doc/html/boost_asio/history.html"&gt;Revision
History&lt;/a&gt; for further details.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/atomic/"&gt;Atomic&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
When compiled for x86 targets supporting AVX, vector instructions
are now used for 128-bit atomic loads and stores.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
For 32-bit x86 targets, 64-bit atomic loads and stores with &lt;code&gt;&lt;span class="identifier"&gt;memory_order_seq_cst&lt;/span&gt;&lt;/code&gt; semantics
will now issue a memory ordering instruction.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Removed &lt;code&gt;&lt;span class="identifier"&gt;atomic&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;T&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;::&lt;/span&gt;&lt;span class="identifier"&gt;storage&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;
accessors and &lt;code&gt;&lt;span class="identifier"&gt;atomic&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;T&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;::&lt;/span&gt;&lt;span class="identifier"&gt;storage_type&lt;/span&gt;&lt;/code&gt;
types that were deprecated in Boost.Atomic 1.73. Users are recommended
to use &lt;code&gt;&lt;span class="identifier"&gt;atomic&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;T&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;::&lt;/span&gt;&lt;span class="identifier"&gt;value&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;atomic&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;T&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;::&lt;/span&gt;&lt;span class="identifier"&gt;value_type&lt;/span&gt;&lt;/code&gt; instead.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/beast"&gt;Beast&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Add &lt;code&gt;&lt;span class="identifier"&gt;error_code&lt;/span&gt;&lt;/code&gt;s use
source_location
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
tcp_stream uses the correct executor of the timer.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
error_categories use numeric ids
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;file_body&lt;/span&gt;&lt;/code&gt; supports
seek
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/container_hash/"&gt;ContainerHash&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added an overload of &lt;code&gt;&lt;span class="identifier"&gt;hash_value&lt;/span&gt;&lt;/code&gt;
for &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;nullptr_t&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;is_tuple_like&lt;/span&gt;&lt;/code&gt;
and an overload of &lt;code&gt;&lt;span class="identifier"&gt;hash_value&lt;/span&gt;&lt;/code&gt;
for tuple-like types.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed string hashing to use &lt;a href="https://github.com/pdimov/mulxp_hash"&gt;&lt;code&gt;&lt;span class="identifier"&gt;mulxp1_hash&lt;/span&gt;&lt;/code&gt;&lt;/a&gt;. This improves
both quality and speed.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/core/"&gt;Core&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;snprintf&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt; header with portable definitions
of &lt;code&gt;&lt;span class="identifier"&gt;snprintf&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;vsnprintf&lt;/span&gt;&lt;/code&gt; and their &lt;code&gt;&lt;span class="keyword"&gt;wchar_t&lt;/span&gt;&lt;/code&gt; counterparts.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Deprecated &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;is_same&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;is_same&lt;/span&gt;&lt;/code&gt;. The header will be removed
in a future release. Users are advised to use Boost.TypeTraits or
C++ standard library type traits instead.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Marked &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;ref&lt;/span&gt;&lt;/code&gt; member functions and associated
methods with &lt;code&gt;&lt;span class="keyword"&gt;noexcept&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Marked &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;swap&lt;/span&gt;&lt;/code&gt; function with &lt;code&gt;&lt;span class="keyword"&gt;noexcept&lt;/span&gt;&lt;/code&gt;, depending on whether the
type supports a non-throwing swap operation.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;launder&lt;/span&gt;&lt;/code&gt;, a portable implementation
of &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;launder&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;BOOST_CORE_ALIGNOF&lt;/span&gt;&lt;/code&gt;,
a portable implementation of &lt;code&gt;&lt;span class="keyword"&gt;alignof&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;max_align_t&lt;/span&gt;&lt;/code&gt;, a portable equivalent
of &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;max_align_t&lt;/span&gt;&lt;/code&gt;, and &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;max_align&lt;/span&gt;&lt;/code&gt;, the alignment of &lt;code&gt;&lt;span class="identifier"&gt;max_align_t&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;memory_resource&lt;/span&gt;&lt;/code&gt;, a portable equivalent
of &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;pmr&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;memory_resource&lt;/span&gt;&lt;/code&gt; from C++17.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;serialization&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;, a collection of primitives
allowing libraries to implement Boost.Serialization support for their
types without including a Serialization header and thereby making
their libraries depend on Serialization.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;data&lt;/span&gt;&lt;/code&gt;, an implementation of &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;data&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;size&lt;/span&gt;&lt;/code&gt;, an implementation of &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;size&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Updated &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;span&lt;/span&gt;&lt;/code&gt; to use &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;data&lt;/span&gt;&lt;/code&gt;
which adds support for range construction from an &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;initializer_list&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;identity&lt;/span&gt;&lt;/code&gt;, an implementation of
&lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;identity&lt;/span&gt;&lt;/code&gt;. This facility has been
moved from Boost.Functional.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/dll/"&gt;DLL&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Avoid implicit cast from size_t to uint32_t, thanks to Travers Biddle
for the PR &lt;a href="https://github.com/boostorg/dll/pull/57"&gt;PR#57&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/filesystem/"&gt;Filesystem&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compilation errors that could have been caused by &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;/code&gt; conversion constructors being
too permissive on the accepted arguments. (&lt;a href="https://github.com/boostorg/filesystem/issues/273"&gt;#273&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;v4:&lt;/strong&gt; &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;remove_filename&lt;/span&gt;&lt;/code&gt;
now presesrves the trailing directory separator. (&lt;a href="https://github.com/boostorg/filesystem/issues/271"&gt;#271&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;remove_filename_and_trailing_separators&lt;/span&gt;&lt;/code&gt;,
which removes the filename and directory separators preceding it
from the path. This behavior is similar to &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;remove_filename&lt;/span&gt;&lt;/code&gt;
in Filesystem &lt;strong&gt;v3&lt;/strong&gt;, but is also usable
in &lt;strong&gt;v4&lt;/strong&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;replace_filename&lt;/span&gt;&lt;/code&gt;, which replaces
filename in a path.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Updated implementation of the library version selection to avoid
ODR violations. (&lt;a href="https://github.com/boostorg/filesystem/issues/279"&gt;#279&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, added a workaround for querying file attributes for files
in SMBv1 shares. Previously, directories in SMBv1 shares could have
been reported as regular files. This does not affect SMBv2 or later.
(&lt;a href="https://github.com/boostorg/filesystem/issues/282"&gt;#282&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/geometry/"&gt;Geometry&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Major improvements
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/1045"&gt;PR#1045&lt;/a&gt; Support geographic buffer for (multi)linestrings
and (multi)polygons
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improvements
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/1114"&gt;PR#1114&lt;/a&gt; Comparable distance: Add support for dynamic
geometries
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/1046"&gt;PR#1046&lt;/a&gt; Support covered_by() for box, geometry combinations
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Solved issues
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/705"&gt;#705&lt;/a&gt; WKT: allow tabs and new lines
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/1109"&gt;#1109&lt;/a&gt;, &lt;a href="https://github.com/boostorg/geometry/issues/1108"&gt;#1108&lt;/a&gt; Fixes for union
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Various fixes in examples
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Breaking changes
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
The WKT output presentation of an empty polygon is now POLYGON()
to make it consistent with other geometries
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/histogram/"&gt;Histogram&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Replace &lt;code&gt;&lt;span class="identifier"&gt;detail&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;span&lt;/span&gt;&lt;/code&gt; and &lt;code&gt;&lt;span class="identifier"&gt;detail&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;make_span&lt;/span&gt;&lt;/code&gt;
with implementations in &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Documentation improvements
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Protect usage of &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;min&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;max&lt;/span&gt;&lt;/code&gt; in some cases, contributed
by Han Jiang (min,max macros are illegially set by popular Windows
headers so we need to work around)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added test to catch usage of unprotected min,max tokens in the library
in the future
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixes to support latest clang-14 and deduction guides in gcc-11+
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/json/"&gt;JSON&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;set_at_pointer&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;hash&lt;/span&gt;&lt;/code&gt; support.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Caller-provided serializer storage.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;value_to&lt;/span&gt;&lt;/code&gt; supports
missing elements for &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;optional&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix parser suspend inside an escape character.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Make sentinel() return a unique pointer.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/locale/"&gt;Locale&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;get_system_locale&lt;/span&gt;&lt;/code&gt;
and dependents will now correctly favor &lt;code&gt;&lt;span class="identifier"&gt;LC_ALL&lt;/span&gt;&lt;/code&gt;
over &lt;code&gt;&lt;span class="identifier"&gt;LC_CTYPE&lt;/span&gt;&lt;/code&gt; as
defined by POSIX &lt;a href="https://github.com/boostorg/locale/pull/144"&gt;PR#144&lt;/a&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;utf8_codecvt&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;out&lt;/span&gt;&lt;/code&gt; returns &lt;code&gt;&lt;span class="identifier"&gt;partial&lt;/span&gt;&lt;/code&gt;
for trailing (UTF) surrogates
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;locale&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;util&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;locale_data&lt;/span&gt;&lt;/code&gt; to parse a locale
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;locale&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;info&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;encoding&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;
result is now in uppercase as documented, e.g. "UTF-8"
instead of "utf-8"
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Support M49 country codes such as &lt;code&gt;&lt;span class="identifier"&gt;en_001&lt;/span&gt;&lt;/code&gt;
or &lt;code&gt;&lt;span class="identifier"&gt;en_150&lt;/span&gt;&lt;/code&gt; &lt;a href="https://github.com/boostorg/locale/pull/148"&gt;PR#148&lt;/a&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Treat &lt;code&gt;&lt;span class="identifier"&gt;en_US_POSIX&lt;/span&gt;&lt;/code&gt;
as an alias for the &lt;code&gt;&lt;span class="identifier"&gt;C&lt;/span&gt;&lt;/code&gt;
locale &lt;a href="https://github.com/boostorg/locale/pull/148"&gt;PR#148&lt;/a&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improve error for missing segmentation support (i.e. without ICU)
&lt;a href="https://github.com/boostorg/locale/pull/149"&gt;PR#149&lt;/a&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix compiler warnings
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/math/"&gt;Math&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Deprecated C++11 support&lt;/strong&gt;: We now
require C++14 as a minimum standard. Our minimum tested compiler
versions are now Clang-5, GCC-5 or MSVC-14.1.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added Estrin's method for polynomial evaluation.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix various issues in non-central distributions to allow for larger
non-centralities see &lt;a href="https://github.com/boostorg/math/pull/939"&gt;939&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added CMake install target.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix special_functions.hpp to disable anything which can't be used
in an exception-free environment.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Get condition number calculation working in C++14.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix &lt;code&gt;&lt;span class="keyword"&gt;constexpr&lt;/span&gt;&lt;/code&gt; table
driven functions to avoid massive slowdown when the code is not actually
&lt;code&gt;&lt;span class="keyword"&gt;constexpr&lt;/span&gt;&lt;/code&gt;, see &lt;a href="https://github.com/boostorg/math/issues/923"&gt;923&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improve tanh_sinh boundary handling, see &lt;a href="https://github.com/boostorg/math/pull/894"&gt;894&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add Linux arm64, s390x and Apple M1 testing, fix up test cases to
handle 128-bit long doubles.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improve &lt;code&gt;&lt;span class="keyword"&gt;constexpr&lt;/span&gt;&lt;/code&gt; math
functions to better handle infinities and NaN's.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Make the integrators const-correct.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix tanh_sinh integrator in case the function underflows, see &lt;a href="https://github.com/boostorg/math/issues/898"&gt;898&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Don't use &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;cbrt&lt;/span&gt;&lt;/code&gt; as some platforms still don't
support it.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Stop non-central T from raising spurious FE_INVALID exceptions, see
&lt;a href="https://github.com/boostorg/math/pull/892"&gt;892&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix binomial distribution edge case.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improve ibeta handling of very small arguments, see &lt;a href="https://github.com/boostorg/math/pull/884"&gt;884&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improve ibeta handling of infinities and NaN's, see &lt;a href="https://github.com/boostorg/math/issues/878"&gt;878&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improve error handling in powm1, see &lt;a href="https://github.com/boostorg/math/issues/781"&gt;781&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improve root-finder bracketing to bracket faster when the exponent
is super-large or small.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix root finding edge cases, see &lt;a href="https://github.com/boostorg/math/issues/873"&gt;873&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Lots of miscellaneous warning fixes.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add assertions when using features which require C++17 for better
error messages when invoking the compiler in a lower std version.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/multi_index/doc/index.html"&gt;Multi-index Containers&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Serialization now uses &lt;code&gt;&lt;span class="keyword"&gt;unsigned&lt;/span&gt;
&lt;span class="keyword"&gt;long&lt;/span&gt;&lt;/code&gt; instead of &lt;a href="https://www.boost.org/libs/serialization/doc/wrappers.html#collection_size_type"&gt;&lt;code&gt;&lt;span class="identifier"&gt;collection_size_type&lt;/span&gt;&lt;/code&gt;&lt;/a&gt;, and
&lt;code&gt;&lt;span class="identifier"&gt;multi_index_container&lt;/span&gt;&lt;/code&gt;
serialization &lt;a href="https://www.boost.org/libs/serialization/doc/tutorial.html#versioning"&gt;class
version&lt;/a&gt; has been bumped from 2 to 3 to reflect this change.
Reading old archives may fail for custom archive types giving special
treatment to &lt;code&gt;&lt;span class="identifier"&gt;collection_size_type&lt;/span&gt;&lt;/code&gt;
values: if this is the case, globally define the macro &lt;code&gt;&lt;span class="identifier"&gt;BOOST_MULTI_INDEX_ENABLE_SERIALIZATION_COMPATIBILITY_V2&lt;/span&gt;&lt;/code&gt;
to ensure backwards compatibility in reading operations.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Maintenance work.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/multiprecision/"&gt;Multiprecision&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Deprecated C++11 support&lt;/strong&gt;: We now
require C++14 as a minimum standard. Our minimum tested compiler
versions are now Clang-5, GCC-5 or MSVC-14.1.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a new forward declaration header.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Update Eigen interoperability so we no longer rely on Eigen's details,
see &lt;a href="https://github.com/boostorg/multiprecision/issues/479"&gt;479&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add Cmake install target.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix cpp_dec_float construction from string in standalone case for
better error handling, see &lt;a href="https://github.com/boostorg/multiprecision/issues/499"&gt;499&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Remove redundent definitions when in C++17 mode, see &lt;a href="https://github.com/boostorg/multiprecision/pull/530"&gt;530&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix the error handling in standalone itrunc and ltrunc.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix potentially uninitialized storage when parsing octal strings.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add arm64 and s390x CI testing.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add some missing expression template unpacking code for &lt;code&gt;&lt;span class="identifier"&gt;powm&lt;/span&gt;&lt;/code&gt;, see &lt;a href="https://github.com/boostorg/multiprecision/issues/506"&gt;506&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/nowide/"&gt;Nowide&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Add &lt;code&gt;&lt;span class="identifier"&gt;convert_string&lt;/span&gt;&lt;/code&gt;
overload accepting a (&lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;/code&gt;)string instance
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add &lt;code&gt;&lt;span class="identifier"&gt;quoted&lt;/span&gt;&lt;/code&gt; to output
(quoted UTF-8) paths (&lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;filesystem&lt;/span&gt;&lt;/code&gt;
or &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;filesystem&lt;/span&gt;&lt;/code&gt;) to streams &lt;a href="https://github.com/boostorg/nowide/pull/170"&gt;PR#170&lt;/a&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/pfr/"&gt;PFR&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Implemented the &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;pfr&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;is_implicitly_reflectable&lt;/span&gt;&lt;/code&gt;
and the machinery for specializing aggregates as reflectable or not,
thanks to Denis Mikhailov for the PR &lt;a href="https://github.com/boostorg/pfr/pull/111"&gt;PR#111&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Implemented &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;pfr&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;get&lt;/span&gt;&lt;/code&gt;
by type of an element in the aggregate.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Implemented the &lt;code&gt;&lt;span class="identifier"&gt;BOOST_PFR_ENABLED&lt;/span&gt;&lt;/code&gt;
macro to detect library support for reflection, thanks to Denis Mikhailov
for the PR &lt;a href="https://github.com/boostorg/pfr/pull/86"&gt;PR#86&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed missing terminating character, thanks to Denis Mikhailov for
the PR &lt;a href="https://github.com/boostorg/pfr/pull/114"&gt;PR#114&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed the &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;pfr&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;config&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt; compilation on older compilers,
thanks to Denis Mikhailov for the PR &lt;a href="https://github.com/boostorg/pfr/pull/118"&gt;PR#118&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Workaround for broken C++17 stuctured binding in old compilers, thanks
to Denis Mikhailov for the PR &lt;a href="https://github.com/boostorg/pfr/pull/119"&gt;PR#119&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Avoid -Wzero-as-null-pointer-constant warnings, thanks to Markus
F.X.J. Oberhumer for the PR &lt;a href="https://github.com/boostorg/pfr/pull/117"&gt;PR#117&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed multiple typos, thanks to Denis Mikhailov for the fixes.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added missing &lt;code&gt;&lt;span class="preprocessor"&gt;#pragma&lt;/span&gt;
&lt;span class="identifier"&gt;once&lt;/span&gt;&lt;/code&gt;, thanks to &lt;a href="https://github.com/caozhanhao"&gt;caozhanhao&lt;/a&gt; for the PR
&lt;a href="https://github.com/boostorg/pfr/pull/121"&gt;PR#121&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Multiple fixes and improvements for the docs.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/process"&gt;Process&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added management for extern processes to V2 (still experimental)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Deprecated &lt;code&gt;&lt;span class="identifier"&gt;wait_for&lt;/span&gt;&lt;/code&gt;
&amp;amp; &lt;code&gt;&lt;span class="identifier"&gt;wait_until&lt;/span&gt;&lt;/code&gt;
in V1 - they will be removed in the future!
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/stacktrace/"&gt;Stacktrace&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed typos in docs and comments, thanks to Chocobo1 for the PR &lt;a href="https://github.com/boostorg/stacktrace/pull/132"&gt;PR#132&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed multithreading flag detection for &lt;code&gt;&lt;span class="identifier"&gt;backtrace_create_state&lt;/span&gt;&lt;/code&gt;
if &lt;code&gt;&lt;span class="identifier"&gt;BOOST_STACKTRACE_BACKTRACE_FORCE_STATIC&lt;/span&gt;&lt;/code&gt;
is defined.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/static_string/"&gt;StaticString&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Boost.Core &lt;code&gt;&lt;span class="identifier"&gt;string_view&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;string_view&lt;/span&gt;&lt;/code&gt; interoperability
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/test/"&gt;Test&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed several unused variable warnings
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed sprintf deprecation warnings
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed undefined behavior in &lt;code&gt;&lt;span class="identifier"&gt;basic_cstring&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;rfind&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added CI through Github Actions
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/unordered/"&gt;Unordered&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Major update.&lt;/strong&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added node-based, open-addressing containers &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;unordered_node_map&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;unordered_node_set&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Extended heterogeneous lookup to more member functions as specified
in &lt;a href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p2363r5.html"&gt;P2363&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Replaced the previous post-mixing process for open-addressing containers
with a new algorithm based on extended multiplication by a constant.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed bug in internal &lt;code&gt;&lt;span class="identifier"&gt;emplace&lt;/span&gt;&lt;/code&gt;
impl where stack-local types were not properly constructed using
the allocator of the container which breaks uses-allocator construction.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/url/"&gt;URL&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Add &lt;code&gt;&lt;span class="identifier"&gt;url&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;format&lt;/span&gt;&lt;/code&gt; with automatic percent-encoding
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
URL router example
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;set_params&lt;/span&gt;&lt;/code&gt; convenience
function
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Support implicit conversions to &lt;code&gt;&lt;span class="identifier"&gt;string_view&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Parsing constructors are implicit
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;string_token&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;arg&lt;/span&gt;&lt;/code&gt; has virtual destructor and
slice protection
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Support &lt;code&gt;&lt;span class="identifier"&gt;BOOST_URL_DISABLE_THREADS&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improvements and Bug fixes:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
WIN32_LEAN_AND_MEAN macro redefinition warning
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Comparison differentiates absent and empty components
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Detect &lt;code&gt;&lt;span class="identifier"&gt;hier_part_rule&lt;/span&gt;&lt;/code&gt;
with empty-port-like segments
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Segments comparison as if normalized works above root
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
hier-part path-rootless considers invalid segments
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
port as number is set to 0 when it overflows
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
ipv4 to string overflow detection algorithm
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/variant/"&gt;Variant&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Now uses core/addressof instead of the deprecated utility/addressof.
Thanks to Michael Ford for the PR &lt;a href="https://github.com/boostorg/variant/pull/105"&gt;PR#105&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_82_0.updated_tools"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Updated Tools&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/tools/build/"&gt;Build&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Includes release of &lt;a href="https://www.boost.org/tools/build/doc/html/#_version_4_9_4"&gt;B2
version 4.9.4&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_82_0.compilers_tested"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Compilers Tested&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
Boost's primary test compilers are:
&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Linux:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++03: 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 12.0.0, 13.0.0, 14.0.0,
15.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++11: 3.4, 11.0.0, 13.0.0, 14.0.0, 15.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++14: 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 5.0, 12.0.0, 13.0.0,
14.0.0, 15.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++17: 6.0.1, 7.0.0, 8.0.0, 9.0.0, 10.0.0, 11.0.0, 12.0.0,
13.0.0, 14.0.0, 15.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++20: 11.0.0, 12.0.0, 13.0.0, 14.0.0, 15.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++03: 4.6.3, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++11: 4.7.3, 4.8.5, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++14: 5.4.0, 6.4.0, 7.3.0, 8.0.1, 9.1.0, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++17: 7.3.0, 8.0.1, 9.1.0, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++20: 8.0.1, 9.1.0, 10, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
OS X:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++03: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++11: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++14: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++17: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++20: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Windows:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Visual C++: 10.0, 11.0, 12.0, 14.0, 14.1, 14.2, 14.3
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_82_0.acknowledgements"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Acknowledgements&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
Marshall Clow and Glen Fernandes managed this release.
&lt;/p&gt;
&lt;/div&gt;
</description></item><item><title>Version 1.81.0</title><link>https://www.boost.org/users/history/version_1_81_0.html</link><guid>https://www.boost.org/users/history/version_1_81_0.html</guid><pubDate>Wed, 14 Dec 2022 17:44:48 +0000</pubDate><description>
&lt;div id="version_1_81_0.new_libraries"&gt;
&lt;h3&gt;&lt;span class="link"&gt;New Libraries&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/url/"&gt;URL&lt;/a&gt;:&lt;/span&gt; A library for parsing, modifying,
and printing URLs using only C++11, from Vinnie Falco and Alan de Freitas.
Features include fast compilation, strong invariants, and strict compliance
using a memory-friendly approach.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_81_0.updated_libraries"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Updated Libraries&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/asio/"&gt;Asio&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added the &lt;code&gt;&lt;span class="identifier"&gt;consign&lt;/span&gt;&lt;/code&gt;
completion token adapter, which can be used to attach additional
values to a completion handler.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;any_completion_handler&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;&lt;/span&gt;&lt;/code&gt;, which can be used to type-erase
completion handlers.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;co_composed&lt;/span&gt;&lt;/code&gt;
to enable lightweight implementations of user-defined asynchronous
operations using C++20 coroutines.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add range-based &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;make_parallel_group&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; overloads.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;any_completion_executor&lt;/span&gt;&lt;/code&gt;,
a type-erased wrapper for executors that are associated with completion
handlers.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added missing &lt;code&gt;&lt;span class="identifier"&gt;context&lt;/span&gt;&lt;/code&gt;
query to use_future's executor.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added nothrow constructor overloads to &lt;code&gt;&lt;span class="identifier"&gt;execution&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;any_executor&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;&lt;/span&gt;&lt;/code&gt; and &lt;code&gt;&lt;span class="identifier"&gt;any_io_executor&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Optimised representation of empty &lt;code&gt;&lt;span class="identifier"&gt;execution&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;any_executor&lt;/span&gt;&lt;/code&gt;
objects to improve the performance of copy and move operations.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added an &lt;code&gt;&lt;span class="identifier"&gt;associated_cancellation_slot&lt;/span&gt;&lt;/code&gt;
specialisation for &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;reference_wrapper&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed I/O objects to return their executors by const reference.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed associated to use deduced return types for all two-argument
&lt;code&gt;&lt;span class="identifier"&gt;get&lt;/span&gt;&lt;/code&gt; functions.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;spawn&lt;/span&gt;&lt;/code&gt; implementation
to catch unhandled exceptions and rethrow them outside of the spawned
"thread".
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;spawn&lt;/span&gt;&lt;/code&gt; to ensure
the completion handler is dispatched through the correct executor.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed cleanup of of terminal-state &lt;code&gt;&lt;span class="identifier"&gt;spawn&lt;/span&gt;&lt;/code&gt;
"thread" objects.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;spawn&lt;/span&gt;&lt;/code&gt; and
&lt;code&gt;&lt;span class="identifier"&gt;co_spawn&lt;/span&gt;&lt;/code&gt; implementations
to dispatch cancellation handlers on the correct executor.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed semantics of 'dispatch' to mean the executor is used as-is.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Deprecated the &lt;code&gt;&lt;span class="identifier"&gt;execution&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;execute&lt;/span&gt;&lt;/code&gt;
customisation point and sender/receiver facilities.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a C++11 &lt;code&gt;&lt;span class="identifier"&gt;parallel_group&lt;/span&gt;&lt;/code&gt;
example.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed example code to not use the deprecated &lt;code&gt;&lt;span class="identifier"&gt;resolve&lt;/span&gt;&lt;/code&gt;
conversions.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed an ambiguity in &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;channel_traits&lt;/span&gt;&lt;/code&gt;
specialisations.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a specialised channel implementation for the for &lt;code&gt;&lt;span class="identifier"&gt;R&lt;/span&gt;&lt;span class="special"&gt;(&lt;/span&gt;&lt;span class="identifier"&gt;error_code&lt;/span&gt;&lt;span class="special"&gt;)&lt;/span&gt;&lt;/code&gt;
signature.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Made &lt;code&gt;&lt;span class="identifier"&gt;cancelled&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;
public on the &lt;code&gt;&lt;span class="identifier"&gt;async_compose&lt;/span&gt;&lt;/code&gt;
'self' object.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added io_executor_type and get_io_executor to the &lt;code&gt;&lt;span class="identifier"&gt;async_compose&lt;/span&gt;&lt;/code&gt;
'self' object.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed implementation of &lt;code&gt;&lt;span class="identifier"&gt;release&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; for Windows overlapped handles.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Enabled deferred awaiting for &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;coro&lt;/span&gt;&lt;/code&gt;,
regularised &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;use_coro&lt;/span&gt;&lt;/code&gt;,
and fixed allocator handling.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Cleaned up &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;promise&lt;/span&gt;&lt;/code&gt;
and made it an asynchronous operation object.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Constrained &lt;code&gt;&lt;span class="identifier"&gt;post&lt;/span&gt;&lt;/code&gt;/&lt;code&gt;&lt;span class="identifier"&gt;defer&lt;/span&gt;&lt;/code&gt; overloads on ability to require
&lt;code&gt;&lt;span class="identifier"&gt;blocking&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;never&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed descriptor implementation to fall back to &lt;code&gt;&lt;span class="identifier"&gt;fcntl&lt;/span&gt;&lt;/code&gt;
if &lt;code&gt;&lt;span class="identifier"&gt;ioctl&lt;/span&gt;&lt;/code&gt; fails with
&lt;code&gt;&lt;span class="identifier"&gt;ENOTTY&lt;/span&gt;&lt;/code&gt; when setting
non-blocking mode.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed Xcode deprecation warnings related to use of &lt;code&gt;&lt;span class="identifier"&gt;sprintf&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed the arguments passed to &lt;code&gt;&lt;span class="identifier"&gt;select_reactor&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;run&lt;/span&gt;&lt;/code&gt;
when it is run on an internal thread.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compilation errors when &lt;code&gt;&lt;span class="identifier"&gt;BOOST_ASIO_DISABLE_SMALL_BLOCK_RECYCLING&lt;/span&gt;&lt;/code&gt;
is defined.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Updated detection of C++20 coroutine support on clang 14 and later.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed standard library feature detection to always enable &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;invoke_result&lt;/span&gt;&lt;/code&gt; when targeting C++17
or later.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed detection of return type deduction with MSVC.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Updated the asynchronous operation requirements to relax the requirements
on the associated executor.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;tt&gt;io_uring&lt;/tt&gt; to the implementation notes.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Consult the &lt;a href="https://www.boost.org/doc/libs/1_81_0/doc/html/boost_asio/history.html"&gt;Revision
History&lt;/a&gt; for further details.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/beast/"&gt;Beast&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Add &lt;code&gt;&lt;span class="identifier"&gt;buffers_generator&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add &lt;code&gt;&lt;span class="identifier"&gt;beast&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;http&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;message_generator&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;buffer_ref&lt;/span&gt;&lt;/code&gt;,
so beast buffers can be used with asio.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Support for per-operation cancellation
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
C++20 awaitable examples.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
websocket per-message compression options
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
websocket timeout option api
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
multiple content length error
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Support for default-completion and rebind
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/container_hash/"&gt;Container Hash&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Major update.&lt;/strong&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
The specializations of &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;hash&lt;/span&gt;&lt;/code&gt;
have been removed; it now always calls &lt;code&gt;&lt;span class="identifier"&gt;hash_value&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Support for &lt;code&gt;&lt;span class="identifier"&gt;BOOST_HASH_NO_EXTENSIONS&lt;/span&gt;&lt;/code&gt;
has been removed. The extensions are always enabled.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
All standard containers are now supported. This includes &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;forward_list&lt;/span&gt;&lt;/code&gt; and the unordered
associative containers.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
User-defined containers (types that have &lt;code&gt;&lt;span class="identifier"&gt;begin&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; and &lt;code&gt;&lt;span class="identifier"&gt;end&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; member functions that return iterators)
are now supported out of the box.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Described structs and classes (those annotated with &lt;code&gt;&lt;span class="identifier"&gt;BOOST_DESCRIBE_STRUCT&lt;/span&gt;&lt;/code&gt; or &lt;code&gt;&lt;span class="identifier"&gt;BOOST_DESCRIBE_CLASS&lt;/span&gt;&lt;/code&gt;) are now supported
out of the box.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;hash_combine&lt;/span&gt;&lt;/code&gt; has
been improved.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
The performance (and quality, as a result of the above change) of
string hashing has been improved. &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;hash&lt;/span&gt;&lt;/code&gt;
for strings now passes SMHasher in 64 bit mode.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
The documentation has been substantially revised to reflect the changes.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/core/"&gt;Core&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;empty_value&lt;/span&gt;&lt;/code&gt; members
are now marked as &lt;code&gt;&lt;span class="keyword"&gt;constexpr&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;fclose_deleter&lt;/span&gt;&lt;/code&gt;,
a deleter that calls &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;fclose&lt;/span&gt;&lt;/code&gt;
on a pointer to &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;FILE&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Bit manipulation utilities in &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;bit&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;
now explicitly require unsigned integers on input. (&lt;a href="https://github.com/boostorg/core/issues/129"&gt;#129&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;bit_width&lt;/span&gt;&lt;/code&gt; now returns
&lt;code&gt;&lt;span class="keyword"&gt;int&lt;/span&gt;&lt;/code&gt; instead of a value
of the input argument type. This follows resolution of &lt;a href="https://cplusplus.github.io/LWG/issue3656"&gt;LWG3656&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/describe/"&gt;Describe&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
To allow the inclusion of &lt;code&gt;&lt;span class="identifier"&gt;enumerators&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;bases&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;, and &lt;code&gt;&lt;span class="identifier"&gt;members&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;
when the option &lt;code&gt;&lt;span class="special"&gt;-&lt;/span&gt;&lt;span class="identifier"&gt;pedantic&lt;/span&gt;&lt;/code&gt;
is used, the invocation of &lt;code&gt;&lt;span class="identifier"&gt;BOOST_DESCRIBE_ENUM&lt;/span&gt;&lt;/code&gt;
has been moved from &lt;code&gt;&lt;span class="identifier"&gt;modifiers&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;
into a separate header, &lt;code&gt;&lt;span class="identifier"&gt;modifier_description&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;.
As a consequence, &lt;code&gt;&lt;span class="identifier"&gt;modifiers&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;
no longer includes &lt;code&gt;&lt;span class="keyword"&gt;enum&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;.
Code that has been relying on this implicit inclusion may fail, and
will need to be fixed to include &lt;code&gt;&lt;span class="keyword"&gt;enum&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/dll/"&gt;DLL&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;path_from_handle&lt;/span&gt;&lt;/code&gt;
implementation for Windows platforms, thanks to @SaltfishAmi for
the bug report &lt;a href="https://github.com/apolukhin/Boost.DLL/issues/57"&gt;57&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/filesystem/"&gt;Filesystem&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Deprecated:&lt;/strong&gt; &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;/code&gt;
construction, assignment and appending from containers of characters,
such as &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;vector&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="keyword"&gt;char&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;
or &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;list&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="keyword"&gt;wchar_t&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;,
is deprecated in &lt;strong&gt;v3&lt;/strong&gt; and removed
in &lt;strong&gt;v4&lt;/strong&gt;. Please use string types or
iterators instead.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Deprecated:&lt;/strong&gt; &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;filesystem&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;path_traits&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;
header is deprecated and will be removed in a future release. The
header contained implementation details of &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;/code&gt;
and should not be used in user's code.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Previously deprecated APIs will now generate compilation warnings
on use. To suppress these warnings, &lt;code&gt;&lt;span class="identifier"&gt;BOOST_FILESYSTEM_ALLOW_DEPRECATED&lt;/span&gt;&lt;/code&gt;
macro can be defined when compiling user's code.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compilation due to a missing include on POSIX systems that
do not support &lt;code&gt;&lt;span class="special"&gt;*&lt;/span&gt;&lt;span class="identifier"&gt;at&lt;/span&gt;&lt;/code&gt;
APIs. (&lt;a href="https://github.com/boostorg/filesystem/issues/250"&gt;#250&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows prior to 10, added a workaround for network share filesystem
that produces &lt;code&gt;&lt;span class="identifier"&gt;ERROR_INVALID_PARAMETER&lt;/span&gt;&lt;/code&gt;
when constructing directory iterators. (&lt;a href="https://github.com/boostorg/filesystem/pull/246"&gt;PR#246&lt;/a&gt;, &lt;a href="https://github.com/boostorg/filesystem/issues/245"&gt;#245&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, fixed &lt;code&gt;&lt;span class="identifier"&gt;weakly_canonical&lt;/span&gt;&lt;/code&gt;
failing with an &lt;code&gt;&lt;span class="identifier"&gt;ERROR_INVALID_FUNCTION&lt;/span&gt;&lt;/code&gt;
error code if the path started with the "\\?\" prefix.
(&lt;a href="https://github.com/boostorg/filesystem/issues/247"&gt;#247&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added support for &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;string_view&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;string_view&lt;/span&gt;&lt;/code&gt; and &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;container&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;string&lt;/span&gt;&lt;/code&gt;
(as well as respective &lt;code&gt;&lt;span class="keyword"&gt;wchar_t&lt;/span&gt;&lt;/code&gt;
counterparts) in &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;/code&gt;
constructors, assignment and appending operations. (&lt;a href="https://github.com/boostorg/filesystem/issues/208"&gt;#208&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;/code&gt; constructors,
assignment and appending operations taking a pair of iterators will
no longer accept iterators with value types that are not one of the
supported path character types.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, improved compatibility of &lt;code&gt;&lt;span class="identifier"&gt;directory_iterator&lt;/span&gt;&lt;/code&gt;
with various mounted filesystems and Wine releases prior to 7.21.
(&lt;a href="https://github.com/boostorg/filesystem/issues/255"&gt;#255&lt;/a&gt;, &lt;a href="https://github.com/boostorg/filesystem/issues/266"&gt;#266&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, deduplicated files are now reported as regular files
rather than reparse files. (&lt;a href="https://github.com/boostorg/filesystem/issues/262"&gt;#262&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/fusion/"&gt;Fusion&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;fusion&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;identity_view&lt;/span&gt;&lt;/code&gt; (&lt;a href="https://github.com/boostorg/fusion/pull/240"&gt;PR#240&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added support for associative sequences on &lt;code&gt;&lt;span class="identifier"&gt;fusion&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;transform_view&lt;/span&gt;&lt;/code&gt;
(&lt;a href="https://github.com/boostorg/fusion/pull/239"&gt;PR#239&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compilation for the case when &lt;code&gt;&lt;span class="identifier"&gt;fusion&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;reverse_view&lt;/span&gt;&lt;/code&gt;
used with an associative sequence (&lt;a href="https://github.com/boostorg/fusion/pull/237"&gt;PR#237&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed Clang 13 -Wdeprecated-copy warnings (&lt;a href="https://github.com/boostorg/fusion/pull/261"&gt;PR#261&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
A small dependency reorganization. Now &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;ref&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;noncopyable&lt;/span&gt;&lt;/code&gt; are used from Boost.Core
(&lt;a href="https://github.com/boostorg/fusion/pull/249"&gt;PR#249&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added CI testing on Linux and MacOS for clang and gcc, fixed CI testing
on Windows (&lt;a href="https://github.com/boostorg/fusion/pull/245"&gt;PR#245&lt;/a&gt;, &lt;a href="https://github.com/boostorg/fusion/pull/236"&gt;PR#236&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improved docs and fixed typos (&lt;a href="https://github.com/boostorg/fusion/issues/234"&gt;#234&lt;/a&gt;, &lt;a href="https://github.com/boostorg/fusion/pull/235"&gt;PR#235&lt;/a&gt;, &lt;a href="https://github.com/boostorg/fusion/pull/238"&gt;PR#238&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/geometry/"&gt;Geometry&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Solved issues
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/1048"&gt;#1048&lt;/a&gt; Index: Fix dangling references when Indexable
is returned by value by IndexableGetter
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/1076"&gt;#1076&lt;/a&gt; Union: in rare cases it might miss one polygon
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/1081"&gt;#1081&lt;/a&gt; Union: due to precision it might miss interior
rings
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Bugfixes
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/1063"&gt;#1063&lt;/a&gt; Intersection: fix a bug in intersection of
simple spherical polygons
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/1064"&gt;#1064&lt;/a&gt; Formulas: fix a consistency issue in geodesic
direct formulas
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/1088"&gt;#1088&lt;/a&gt; Point: Fix regression for custom point types
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Various fixes for missing include files, warnings, C++20 compilation
errors and documentation
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/histogram/"&gt;Histogram&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Major update.&lt;/strong&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added new &lt;code&gt;&lt;span class="identifier"&gt;accumulators&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;fraction&lt;/span&gt;&lt;/code&gt;
to compute fractions, their variance, and confidence intervals
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added interval computers for fractions: &lt;code&gt;&lt;span class="identifier"&gt;utility&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;clopper_pearson&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;utility&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;wilson_interval&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;utility&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;jeffreys_interval&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;utility&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;wald_interval&lt;/span&gt;&lt;/code&gt; which can compute
intervals with arbitrary confidence level
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;utility&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;confidence_level&lt;/span&gt;&lt;/code&gt; and &lt;code&gt;&lt;span class="identifier"&gt;utility&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;deviation&lt;/span&gt;&lt;/code&gt; types to pass confidence
levels as probabilities or in multiples of standard deviation for
all interval computers, respectively
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed internal &lt;code&gt;&lt;span class="identifier"&gt;sub_array&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;span&lt;/span&gt;&lt;/code&gt; in C++20
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/iterator/"&gt;Iterator&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;function_output_iterator&lt;/span&gt;&lt;/code&gt;
now supports perfect forwarding of the assigned values to the wrapped
function object. (&lt;a href="https://github.com/boostorg/iterator/pull/73"&gt;PR#73&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compilation of constructing a &lt;code&gt;&lt;span class="identifier"&gt;function_input_iterator&lt;/span&gt;&lt;/code&gt;
from result of post-incrementing another &lt;code&gt;&lt;span class="identifier"&gt;function_input_iterator&lt;/span&gt;&lt;/code&gt;.
(&lt;a href="https://github.com/boostorg/iterator/issues/75"&gt;#75&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
The result of post-incrementing an iterator based on &lt;code&gt;&lt;span class="identifier"&gt;iterator_facade&lt;/span&gt;&lt;/code&gt; now supports &lt;code&gt;&lt;span class="keyword"&gt;operator&lt;/span&gt;&lt;span class="special"&gt;-&amp;gt;&lt;/span&gt;&lt;/code&gt;.
&lt;code&gt;&lt;span class="special"&gt;(&lt;/span&gt;&lt;span class="identifier"&gt;it&lt;/span&gt;&lt;span class="special"&gt;++)-&amp;gt;&lt;/span&gt;&lt;span class="identifier"&gt;foo&lt;/span&gt;&lt;/code&gt;
is equivalent to &lt;code&gt;&lt;span class="special"&gt;(*&lt;/span&gt;&lt;span class="identifier"&gt;it&lt;/span&gt;&lt;span class="special"&gt;++).&lt;/span&gt;&lt;span class="identifier"&gt;foo&lt;/span&gt;&lt;/code&gt;, which was supported before.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/json/"&gt;JSON&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;object&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;stable_erase&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;parse&lt;/span&gt;&lt;/code&gt; overload
for &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;istream&lt;/span&gt;&lt;/code&gt; and &lt;code&gt;&lt;span class="keyword"&gt;operator&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&amp;gt;&lt;/span&gt;&lt;/code&gt; for &lt;code&gt;&lt;span class="identifier"&gt;value&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added rvalue ref-qualified accessors for &lt;code&gt;&lt;span class="identifier"&gt;value&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Conversion traits were redesigned.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added conversion support for described classes and enums, &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;optional&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;variant&lt;/span&gt;&lt;/code&gt;,
and null-like types (including &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;nullptr_t&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;nullopt_t&lt;/span&gt;&lt;/code&gt;, and &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;monotype&lt;/span&gt;&lt;/code&gt;).
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added non-throwing conversion from &lt;code&gt;&lt;span class="identifier"&gt;value&lt;/span&gt;&lt;/code&gt;
to user types.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/lexical_cast/"&gt;LexicalCast&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compilation while casting volatile arithmetic types. Thanks
to Giovanni Cerretani for the bug report &lt;a href="https://github.com/boostorg/lexical_cast/issues/50"&gt;#50&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Removed usage of deprecated headers. Thanks to Michael Ford for the
PR &lt;a href="https://github.com/boostorg/lexical_cast/pull/53"&gt;PR#53&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/locale/"&gt;Locale&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Major update with some breaking changes.&lt;/strong&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
C++11 support is now required, support for C++03 and earlier is dropped
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Some enums have been converted to enum classes - Avoids name clashes
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Replace &lt;code&gt;&lt;span class="special"&gt;-&lt;/span&gt;&lt;span class="identifier"&gt;sICU_LINK_LOCALE&lt;/span&gt;&lt;/code&gt;
&amp;amp; &lt;code&gt;&lt;span class="special"&gt;-&lt;/span&gt;&lt;span class="identifier"&gt;sICU_LINK&lt;/span&gt;&lt;/code&gt;
by fine-grained configuration options as done in Boost.RegEx
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix detection of libiconv allowing Boost.Locale to be build (again)
on some platforms
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Remove use of and support for &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;auto_ptr&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Make the &lt;code&gt;&lt;span class="identifier"&gt;codecvt&lt;/span&gt;&lt;/code&gt;
using &lt;code&gt;&lt;span class="keyword"&gt;wchar_t&lt;/span&gt;&lt;/code&gt; on Windows
assume/use UTF-16 enconding
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Performance improvements: Make &lt;code&gt;&lt;span class="identifier"&gt;basic_format&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;date_time&lt;/span&gt;&lt;/code&gt; &amp;amp;
&lt;code&gt;&lt;span class="identifier"&gt;hold_ptr&lt;/span&gt;&lt;/code&gt; movable,
Fix use of format cache
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Make Boost.Locale compatible with more ICU versions (especially the
tests)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix RTTI definitions for some classes (visibility issues)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix compatibility of the ICU backend with some libc++ versions
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix return value of some operators to correctly return non-const
&lt;code&gt;&lt;span class="special"&gt;*&lt;/span&gt;&lt;span class="keyword"&gt;this&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix int-overflow on negative roll of years in &lt;code&gt;&lt;span class="identifier"&gt;date_time&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Handle or suppress many warnings which makes the build log cleaner
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add support for more Windows codepages
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix support for Windows codepages like ISO-2022-JP
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/nowide/"&gt;Nowide&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fix build failure of tests on MSVC
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/stacktrace/"&gt;Stacktrace&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
The library &lt;strong&gt;does not use COM initialization
any more&lt;/strong&gt;. Thanks to Alex Guteniev for the bug report,
clarifications and PR &lt;a href="https://github.com/boostorg/stacktrace/pull/123"&gt;PR#123&lt;/a&gt;!
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
The library now may use &lt;code&gt;&lt;span class="identifier"&gt;BOOST_STACKTRACE_BACKTRACE_INCLUDE_FILE&lt;/span&gt;&lt;/code&gt;
macro value while detecting the libbacktrace availability in b2,
thanks to Ben Gemmill for the bug report &lt;a href="https://github.com/boostorg/stacktrace/issues/115"&gt;#115&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;BOOST_STACKTRACE_BACKTRACE_FORCE_STATIC&lt;/span&gt;&lt;/code&gt;
macro to force a single backtrace_state static instance while using
the libbacktrace. Thanks to the Rasmus Thomsen for the bug report
&lt;a href="https://github.com/boostorg/stacktrace/issues/118"&gt;#118&lt;/a&gt;!
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Avoid unresolved references when including only the &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;stacktrace&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;stacktrace&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt; header. Thanks to the Long
Deng for the bug report &lt;a href="https://github.com/boostorg/stacktrace/issues/116"&gt;#116&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Optimized stacktrace printing by not calling &lt;code&gt;&lt;span class="identifier"&gt;strlen&lt;/span&gt;&lt;/code&gt;
on Windows platforms. Thanks to Alex Guteniev for the bug report
&lt;a href="https://github.com/boostorg/stacktrace/issues/122"&gt;#122&lt;/a&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/pfr/"&gt;PFR&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Improved detection of aggregate initializables in C++14 mode, thanks
to Denis Mikhailov for the PR &lt;a href="https://github.com/boostorg/pfr/pull/97"&gt;PR#97&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Suppress clang-tidy warnings, thanks to Alexander Malkov for the
PRs &lt;a href="https://github.com/boostorg/pfr/pull/109"&gt;PR#109&lt;/a&gt;, &lt;a href="https://github.com/boostorg/pfr/pull/104"&gt;PR#104&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Use fold expressions if they are supported by the compiler. Thanks
to Jean-Michaël Celerier for the PR &lt;a href="https://github.com/boostorg/pfr/pull/96"&gt;PR#96&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/stl_interfaces/"&gt;STLInterfaces&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fix two ill-formed &lt;code&gt;&lt;span class="identifier"&gt;iterator_interface&lt;/span&gt;&lt;/code&gt;
operators in pre-C++20 iterators with a &lt;code&gt;&lt;span class="keyword"&gt;const&lt;/span&gt;&lt;/code&gt;
&lt;code&gt;&lt;span class="identifier"&gt;value_type&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/system/"&gt;System&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
The macro &lt;code&gt;&lt;span class="identifier"&gt;BOOST_SYSTEM_DISABLE_THREADS&lt;/span&gt;&lt;/code&gt;
can now be defined to disable the use of &lt;code&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;mutex&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;
(e.g. on single-threaded libstdc++).
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;value_type&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;error_type&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;in_place_value&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;in_place_error&lt;/span&gt;&lt;/code&gt;
to &lt;code&gt;&lt;span class="identifier"&gt;result&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;emplace&lt;/span&gt;&lt;/code&gt; to
&lt;code&gt;&lt;span class="identifier"&gt;result&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/unordered/"&gt;Unordered&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Major update.&lt;/strong&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added fast containers &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;unordered_flat_map&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;unordered_flat_set&lt;/span&gt;&lt;/code&gt; based on open
addressing.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added CTAD deduction guides for all containers.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added missing constructors as specified in &lt;a href="https://cplusplus.github.io/LWG/issue2713"&gt;LWG
issue 2713&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/variant/"&gt;Variant&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Avoid recursive inclusion of headers, thanks to Nathan Sidwell for
the bug report &lt;a href="https://github.com/boostorg/variant/issues/101"&gt;#101&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Removed usage of deprecated headers, thanks to Michael Ford for the
PR &lt;a href="https://github.com/boostorg/variant/pull/96"&gt;PR#96&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compilation on clang in C++23 mode, thanks to Ed Catmur for
the PR &lt;a href="https://github.com/boostorg/variant/pull/98"&gt;PR#98&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/variant2/"&gt;Variant2&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added support for &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;json&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;value_from&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;json&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;value_to&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_81_0.compilers_tested"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Compilers Tested&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
Boost's primary test compilers are:
&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Linux:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Clang: 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 12.0.0, 13.0.0, 14.0.0, 15.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++11: 3.4, 11.0.0, 13.0.0, 14.0.0, 15.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++14: 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 5.0, 12.0.0, 13.0.0,
14.0.0, 15.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++17: 6.0.1, 7.0.0, 8.0.0, 9.0.0, 10.0.0, 11.0.0, 12.0.0,
13.0.0, 14.0.0, 15.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++20: 11.0.0, 12.0.0, 13.0.0, 14.0.0, 15.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC: 4.6.3, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++11: 4.7.3, 4.8.5, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++14: 5.4.0, 6.4.0, 7.3.0, 8.0.1, 9.1.0, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++17: 7.3.0, 8.0.1, 9.1.0, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++20: 8.0.1, 9.1.0, 10, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
OS X:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++11: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++14: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++17: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++20: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Windows:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Visual C++: 10.0, 11.0, 12.0, 14.0, 14.1, 14.2, 14.3
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_81_0.acknowledgements"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Acknowledgements&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
Marshall Clow and Glen Fernandes managed this release.
&lt;/p&gt;
&lt;/div&gt;
</description></item><item><title>Version 1.80.0</title><link>https://www.boost.org/users/history/version_1_80_0.html</link><guid>https://www.boost.org/users/history/version_1_80_0.html</guid><pubDate>Wed, 10 Aug 2022 21:25:15 +0000</pubDate><description>
&lt;div id="version_1_80_0.known_issues"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Known Issues&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
These are patches from library authors which were found too late to be fixed
in the release.
&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Config
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Support for libcpp15 which removes &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;unary_function&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;binary_function&lt;/span&gt;&lt;/code&gt;. &lt;a href="https://www.boost.org/patches/1_80_0/0005-config-libcpp15.patch"&gt;Patch&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Filesystem
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Directory iterators may fail to construct for a network share on
Windows prior to 10, see &lt;a href="https://github.com/boostorg/filesystem/pull/246"&gt;PR#246&lt;/a&gt; and &lt;a href="https://github.com/boostorg/filesystem/issues/245"&gt;#245&lt;/a&gt;.
&lt;a href="https://www.boost.org/patches/1_80_0/0001-filesystem-win-fix-dir-it-net-share.patch"&gt;Patch&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, &lt;code&gt;&lt;span class="identifier"&gt;weakly_canonical&lt;/span&gt;&lt;/code&gt;
fails to process paths that start with the "\\?\" prefix,
see &lt;a href="https://github.com/boostorg/filesystem/issues/247"&gt;#247&lt;/a&gt;. &lt;a href="https://www.boost.org/patches/1_80_0/0002-filesystem-fix-weakly-canonical-long-paths.patch"&gt;Patch&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On POSIX systems that don't support &lt;code&gt;&lt;span class="special"&gt;*&lt;/span&gt;&lt;span class="identifier"&gt;at&lt;/span&gt;&lt;/code&gt; APIs, compilation fails due
to a missing include, see &lt;a href="https://github.com/boostorg/filesystem/issues/250"&gt;#250&lt;/a&gt;. &lt;a href="https://www.boost.org/patches/1_80_0/0004-filesystem-posix-fix-no-at-apis-missing-include.patch"&gt;Patch&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Unordered
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Containers are not in a valid state after moving, see &lt;a href="https://github.com/boostorg/unordered/issues/139"&gt;#139&lt;/a&gt;.
&lt;a href="https://www.boost.org/patches/1_80_0/0003-unordered-valid-after-move.patch"&gt;Patch&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix MSVC /RTCc build runtime failures. &lt;a href="https://www.boost.org/patches/1_80_0/0006-unordered-msvc-rtcc.patch"&gt;Patch&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_80_0.new_libraries"&gt;
&lt;h3&gt;&lt;span class="link"&gt;New Libraries&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
No new libraries.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_80_0.updated_libraries"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Updated Libraries&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/asio/"&gt;Asio&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added a deduced trailing return type to all asynchronous operations,
to enable the new form of &lt;code&gt;&lt;span class="identifier"&gt;async_result&lt;/span&gt;&lt;/code&gt;
for C++11.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Moved &lt;code&gt;&lt;span class="identifier"&gt;append&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;prepend&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;as_tuple&lt;/span&gt;&lt;/code&gt;,
and &lt;code&gt;&lt;span class="identifier"&gt;deferred&lt;/span&gt;&lt;/code&gt; to the
&lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;asio&lt;/span&gt;&lt;/code&gt; namespace, and made them compatible
with C++11.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Made &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;parallel_group&lt;/span&gt;&lt;/code&gt;
compatible with C++11.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;buffer&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;
overloads for contiguous containers, such as &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;span&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added the ability for &lt;code&gt;&lt;span class="identifier"&gt;awaitable&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;&lt;/span&gt;&lt;/code&gt;-based coroutines to directly
&lt;code&gt;&lt;span class="identifier"&gt;co_await&lt;/span&gt;&lt;/code&gt; operations
that are packaged as function objects.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed &lt;code&gt;&lt;span class="identifier"&gt;spawn&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;
to be a completion token-based asynchronous operation, and added
support for cancellation. The &lt;code&gt;&lt;span class="identifier"&gt;basic_yield_context&lt;/span&gt;&lt;/code&gt;
token now supports move-only and variadic result types. When targeting
C++11 and later, &lt;code&gt;&lt;span class="identifier"&gt;spawn&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; and &lt;code&gt;&lt;span class="identifier"&gt;basic_yield_context&lt;/span&gt;&lt;/code&gt;
are implemented in terms of Boost.Context directly.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added the &lt;code&gt;&lt;span class="identifier"&gt;is_async_operation&lt;/span&gt;&lt;/code&gt;
trait and &lt;code&gt;&lt;span class="identifier"&gt;async_operation&lt;/span&gt;&lt;/code&gt;
concept.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added the &lt;code&gt;&lt;span class="identifier"&gt;completion_signature_of&lt;/span&gt;&lt;/code&gt;
trait.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added converting move construction/assignment to posix descriptors,
serial ports, pipes, Windows &lt;code&gt;&lt;span class="identifier"&gt;object_handle&lt;/span&gt;&lt;/code&gt;,
Windows stream handles, and Windows random-access handles.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;release&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;
member functions to pipes, Windows stream handles, and Windows random-access
handles.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Enabled support for &lt;code&gt;&lt;span class="identifier"&gt;Endpoint&lt;/span&gt;&lt;/code&gt;
implementations that return &lt;code&gt;&lt;span class="keyword"&gt;void&lt;/span&gt;&lt;/code&gt;
pointers from their &lt;code&gt;&lt;span class="identifier"&gt;data&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; member functions, as per the documented
&lt;code&gt;&lt;span class="identifier"&gt;Endpoint&lt;/span&gt;&lt;/code&gt; type requirements.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Removed &lt;code&gt;&lt;span class="identifier"&gt;all&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;race&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;
from &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;promise&lt;/span&gt;&lt;/code&gt;,
as &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;parallel_group&lt;/span&gt;&lt;/code&gt; covers this functionality.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added source locations to exceptions and error codes produced by
the synchronous and asynchronous operations.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compatibility with OpenSSL 3.0.4 and later.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compatibility with with &lt;tt&gt;-masm=intel&lt;/tt&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Explicitly stated that socket &lt;code&gt;&lt;span class="identifier"&gt;shutdown&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; calls are thread-safe with respect
to certain other synchronous operations on the same socket.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Optimised the move construction of I/O objects where only the executor
type differs.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed the detection of &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;invoke_result&lt;/span&gt;&lt;/code&gt;
for clang/libc++.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed an issue where &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;parallel_group&lt;/span&gt;&lt;/code&gt;
initiation incorrectly moved arguments instead of forwarding them.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed a sequencing issue in the implementation of &lt;code&gt;&lt;span class="identifier"&gt;post&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;dispatch&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;, and &lt;code&gt;&lt;span class="identifier"&gt;defer&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed the &lt;code&gt;&lt;span class="identifier"&gt;awaitable&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;&lt;/span&gt;&lt;/code&gt; implementation to propagate
exceptions from awaited initiation functions through the current
completion handler.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed detection of &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;aligned_alloc&lt;/span&gt;&lt;/code&gt;
with &lt;tt&gt;gcc&lt;/tt&gt; 7.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed to avoid using the soon-to-be-deprecated &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;aligned_storage&lt;/span&gt;&lt;/code&gt;
on newer compilers.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed detection of &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;aligned_alloc&lt;/span&gt;&lt;/code&gt;
for older Apple platforms.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Removed faulty assertions from &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;coro&lt;/span&gt;&lt;/code&gt;
implementation.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added defence against Qt-defined macros when building with Intel
C++.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed the implementation of the &lt;code&gt;&lt;span class="identifier"&gt;select_reactor&lt;/span&gt;&lt;/code&gt;,
on Windows, to ensure that any exception resulting from failure to
recreate its interrupter's sockets will be allowed to propagate out
through &lt;code&gt;&lt;span class="identifier"&gt;io_context&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;run&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed various compiler warnings.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Updated all composed operations examples, and the C++11 timeouts
example, to use the new &lt;code&gt;&lt;span class="identifier"&gt;async_result&lt;/span&gt;&lt;/code&gt;
form.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added composed operation and coroutine examples for C++20.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Consult the &lt;a href="https://www.boost.org/doc/libs/1_80_0/doc/html/boost_asio/history.html"&gt;Revision
History&lt;/a&gt; for further details.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/atomic/"&gt;Atomic&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Improved portability of endianness checks on ARM, AArch32 and AArch64
targets. (&lt;a href="https://github.com/boostorg/atomic/issues/59"&gt;#59&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compilation with MSVC 14.0 (Visual Studio 2015) in C++17 mode.
(&lt;a href="https://github.com/boostorg/atomic/issues/61"&gt;#61&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/filesystem/"&gt;Filesystem&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, added a fallback implementation for querying file attributes
in case if the file cannot be opened with &lt;code&gt;&lt;span class="identifier"&gt;ERROR_ACCESS_DENIED&lt;/span&gt;&lt;/code&gt;
error. This may allow &lt;code&gt;&lt;span class="identifier"&gt;status&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;symlink_status&lt;/span&gt;&lt;/code&gt;
to succeed for system files and directories that are not reparse
points or symlinks. (&lt;a href="https://github.com/boostorg/filesystem/issues/234"&gt;#234&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, added a workaround for FAT/exFAT filesystems that produce
&lt;code&gt;&lt;span class="identifier"&gt;ERROR_INVALID_PARAMETER&lt;/span&gt;&lt;/code&gt;
when querying file attributes. This affected &lt;code&gt;&lt;span class="identifier"&gt;status&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;symlink_status&lt;/span&gt;&lt;/code&gt;,
which reported that files do not exist, and directory iterators,
which failed to construct, as well as other dependent operations.
(&lt;a href="https://github.com/boostorg/filesystem/issues/236"&gt;#236&lt;/a&gt;, &lt;a href="https://github.com/boostorg/filesystem/issues/237"&gt;#237&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Worked around a compilation problem on &lt;a href="https://www.rtems.org/"&gt;RTEMS&lt;/a&gt;.
(&lt;a href="https://github.com/boostorg/filesystem/pull/240"&gt;PR#240&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Linux, corrected switching to &lt;code&gt;&lt;span class="identifier"&gt;sendfile&lt;/span&gt;&lt;/code&gt;
&lt;code&gt;&lt;span class="identifier"&gt;copy_file&lt;/span&gt;&lt;/code&gt; implementation
if &lt;code&gt;&lt;span class="identifier"&gt;copy_file_range&lt;/span&gt;&lt;/code&gt;
failed with &lt;code&gt;&lt;span class="identifier"&gt;ENOSYS&lt;/span&gt;&lt;/code&gt;
in runtime. The &lt;code&gt;&lt;span class="identifier"&gt;sendfile&lt;/span&gt;&lt;/code&gt;
fallback implementation used to skip the filesystem type check and
could fail for some filesystems.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On POSIX systems supporting &lt;code&gt;&lt;span class="identifier"&gt;openat&lt;/span&gt;&lt;/code&gt;
and related APIs defined in POSIX.1-2008 and on Windows Vista and
later, improved protection of &lt;code&gt;&lt;span class="identifier"&gt;remove_all&lt;/span&gt;&lt;/code&gt;
against &lt;a href="https://www.cve.org/CVERecord?id=CVE-2022-21658"&gt;CVE-2022-21658&lt;/a&gt;
that was implemented in the previous release. The previous fix could
still result in removing unintended files in &lt;a href="https://github.com/boostorg/filesystem/issues/224#issuecomment-1183738097"&gt;certain
conditions&lt;/a&gt;. Other systems remain vulnerable.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/gil/"&gt;GIL&lt;/a&gt;:&lt;/span&gt;
&lt;strong&gt;NOTICE:&lt;/strong&gt;
We are planning BREAKING switch to C++17 as minimum required C++ language
version in one or two releases after Boost 1.80 (&lt;a href="https://github.com/boostorg/gil/issues/676"&gt;#676&lt;/a&gt;)
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
GSoC 2020: Added Perona-Malik anisotropic diffusion algorithm
(&lt;a href="https://github.com/boostorg/gil/pull/500"&gt;PR#500&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GSoC 2020: Added histogram class and related functionality
(&lt;a href="https://github.com/boostorg/gil/pull/499"&gt;PR#499&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GSoC 2020: Added histogram equalization feature (&lt;a href="https://github.com/boostorg/gil/pull/514"&gt;PR#514&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GSoC 2020: Added histogram matching algorithm (&lt;a href="https://github.com/boostorg/gil/pull/515"&gt;PR#515&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GSoC 2020: Added ability to stack images either horizontally
(&lt;code&gt;&lt;span class="identifier"&gt;hstack&lt;/span&gt;&lt;/code&gt;) or
vertically (&lt;code&gt;&lt;span class="identifier"&gt;vstack&lt;/span&gt;&lt;/code&gt;)
(&lt;a href="https://github.com/boostorg/gil/pull/506"&gt;PR#506&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GSoC 2020: Added adaptive histogram equalization algorithm
(&lt;a href="https://github.com/boostorg/gil/pull/516"&gt;PR#516&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GSoC 2020: Added Standard Hough Transform and circle rasterization
(&lt;a href="https://github.com/boostorg/gil/pull/512"&gt;PR#512&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GSoC 2020: Added Bresenham's algorithm for line rasterization
(&lt;a href="https://github.com/boostorg/gil/pull/512"&gt;PR#512&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GSoC 2021: Added rotation of image by arbitrary angle around
its center (&lt;a href="https://github.com/boostorg/gil/pull/565"&gt;PR#565&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GSoC 2021: Added rasterization support for ellipse based on
"An Efficient Ellipse-Drawing Algorithm" by Jerry
Van Aken (&lt;a href="https://github.com/boostorg/gil/pull/585"&gt;PR#585&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;image&lt;/span&gt;&lt;/code&gt;
constructor from compatible view (&lt;a href="https://github.com/boostorg/gil/pull/520"&gt;PR#520&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added inverse function for affine &lt;code&gt;&lt;span class="identifier"&gt;matrix3x2&lt;/span&gt;&lt;/code&gt;
(&lt;a href="https://github.com/boostorg/gil/pull/527"&gt;PR#527&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added standard morphological transformations (&lt;a href="https://github.com/boostorg/gil/pull/541"&gt;PR#541&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;for_each_pixel&lt;/span&gt;&lt;/code&gt;
overload for &lt;code&gt;&lt;span class="identifier"&gt;any_image&lt;/span&gt;&lt;/code&gt;
(&lt;a href="https://github.com/boostorg/gil/pull/648"&gt;PR#648&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added C++17 polymorphic memory resource typedefs for &lt;code&gt;&lt;span class="identifier"&gt;image&lt;/span&gt;&lt;/code&gt; class (&lt;a href="https://github.com/boostorg/gil/pull/529"&gt;PR#529&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;BREAKING:&lt;/strong&gt; The required minimum
C++ version is changed from from C++11 to C++14. Currently,
large parts of GIL still compile with a C++11 compiler. However,
there is no guarantee that it stays that way, and any compilers
that do not support at least C++14 are considered unsupported
as of now.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;BREAKING:&lt;/strong&gt; &lt;code&gt;&lt;span class="identifier"&gt;any_color_converted_view&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; is deprecated and will be
removed in the next release. Use &lt;code&gt;&lt;span class="identifier"&gt;color_converted_view&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; instead, which provides the
same feature.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;BREAKING:&lt;/strong&gt; &lt;code&gt;&lt;span class="identifier"&gt;apply_operation&lt;/span&gt;&lt;/code&gt;
for &lt;code&gt;&lt;span class="identifier"&gt;any_image&lt;/span&gt;&lt;/code&gt;
is deprecated and will be removed in the next release. Use
&lt;code&gt;&lt;span class="identifier"&gt;variant2&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;visit&lt;/span&gt;&lt;/code&gt; instead, which provides
the same feature. (&lt;a href="https://github.com/boostorg/gil/pull/656"&gt;PR#656&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Moved numeric extension to core (&lt;a href="https://github.com/boostorg/gil/pull/573"&gt;PR#573&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added support for C++17's &lt;code&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;filesystem&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;
(&lt;a href="https://github.com/boostorg/gil/pull/636"&gt;PR#636&lt;/a&gt;) The availability of the &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;filesystem&lt;/span&gt;&lt;/code&gt;
is detected automatically, unless the &lt;code&gt;&lt;span class="identifier"&gt;BOOST_GIL_IO_USE_BOOST_FILESYSTEM&lt;/span&gt;&lt;/code&gt;
macro is defined that forces the preference of the Boost.Filesystem.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Renamed &lt;code&gt;&lt;span class="identifier"&gt;pixel_multiply_t&lt;/span&gt;&lt;/code&gt;
to &lt;code&gt;&lt;span class="identifier"&gt;pixel_multiplies_t&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;pixel_divide_t&lt;/span&gt;&lt;/code&gt;
to &lt;code&gt;&lt;span class="identifier"&gt;pixel_divides_t&lt;/span&gt;&lt;/code&gt;
(&lt;a href="https://github.com/boostorg/gil/pull/655"&gt;PR#655&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Renamed &lt;code&gt;&lt;span class="identifier"&gt;io&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;dynamic_io_new&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;
to &lt;code&gt;&lt;span class="identifier"&gt;io&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;detail&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;dynamic&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt; (&lt;a href="https://github.com/boostorg/gil/pull/653"&gt;PR#653&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Moved function &lt;code&gt;&lt;span class="identifier"&gt;construct_matched&lt;/span&gt;&lt;/code&gt;
into &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;gil&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;detail&lt;/span&gt;&lt;/code&gt;
namespace as it was only used by other implementation details
(&lt;a href="https://github.com/boostorg/gil/pull/653"&gt;PR#653&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Made &lt;code&gt;&lt;span class="identifier"&gt;packed_pixel&lt;/span&gt;&lt;/code&gt;
trivially copyable and assignable (&lt;a href="https://github.com/boostorg/gil/pull/679"&gt;PR#679&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Replace deprecated libtiff v4.3 typedefs with C99 fixed-size
integers (&lt;a href="https://github.com/boostorg/gil/pull/685"&gt;PR#685&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Removed
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;BREAKING:&lt;/strong&gt; Removed support
for GCC 5 (&lt;a href="https://github.com/boostorg/gil/pull/572"&gt;PR#572&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Removed deprecated.hpp (&lt;a href="https://github.com/boostorg/gil/pull/627"&gt;PR#627&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed conversion from RGB to HSL (&lt;a href="https://github.com/boostorg/gil/pull/505"&gt;PR#505&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed conversion from RGB to signed CMYK (&lt;a href="https://github.com/boostorg/gil/pull/522"&gt;PR#522&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Removed unnecessary numeric cast in hsv.hpp (&lt;a href="https://github.com/boostorg/gil/pull/530"&gt;PR#530&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed default constructor for &lt;code&gt;&lt;span class="identifier"&gt;homogeneous_color_base&lt;/span&gt;&lt;/code&gt;
for reference pixel elements (&lt;a href="https://github.com/boostorg/gil/pull/542"&gt;PR#542&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed returning reference to local temporary object in &lt;code&gt;&lt;span class="identifier"&gt;subchroma_image_view&lt;/span&gt;&lt;/code&gt; (&lt;a href="https://github.com/boostorg/gil/pull/556"&gt;PR#556&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added missing header guards in diffusion.hpp (&lt;a href="https://github.com/boostorg/gil/pull/568"&gt;PR#568&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;any_image_view&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;::&lt;/span&gt;&lt;span class="identifier"&gt;const_t&lt;/span&gt;&lt;/code&gt;
(&lt;a href="https://github.com/boostorg/gil/pull/526"&gt;PR#526&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed C++20 incompatibilities in I/O extensions (&lt;a href="https://github.com/boostorg/gil/pull/617"&gt;PR#617&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Ensured all examples build without errors (&lt;a href="https://github.com/boostorg/gil/pull/628"&gt;PR#628&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;convolve_2d&lt;/span&gt;&lt;/code&gt;
for images with &lt;code&gt;&lt;span class="identifier"&gt;float32_t&lt;/span&gt;&lt;/code&gt;
channel model (&lt;a href="https://github.com/boostorg/gil/pull/577"&gt;PR#577&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;for_each_pixel&lt;/span&gt;&lt;/code&gt;
for non-1d iterable views (&lt;a href="https://github.com/boostorg/gil/pull/621"&gt;PR#621&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed: &lt;code&gt;&lt;span class="identifier"&gt;is_equal_to_sixteen&lt;/span&gt;&lt;/code&gt;
in PNG I/O was less-than test (&lt;a href="https://github.com/boostorg/gil/pull/650"&gt;PR#650&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Re-allow &lt;code&gt;&lt;span class="identifier"&gt;devicen_t&lt;/span&gt;&lt;/code&gt;
with two components (&lt;a href="https://github.com/boostorg/gil/pull/654"&gt;PR#654&lt;/a&gt;) It was unintentionally removed
in Boost 1.72
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed memory leak in &lt;code&gt;&lt;span class="identifier"&gt;image&lt;/span&gt;&lt;/code&gt;
class for empty dimensions (&lt;a href="https://github.com/boostorg/gil/pull/649"&gt;PR#649&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Acknowledgements
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Cypre55, Samuel Debionne, Mike-Devel, Edward Diener, Peter
Dimov, Omar Emara, Dhruva Gole, Nicolas Herry, Eugene K, Avinal
Kumar, Gaurav Kumar, Marco Langer, Pranam Lashkari, Mateusz
Łoskot, Giovanni Mascellani, Debabrata Mandal, Gopi Krishna
Menon, René Ferdinand Rivera Morell, Felix Morgner, Harshit
Pant, Paul92, André Schröder, Scramjet911, Siddharth, Dirk
Stolle, Prathamesh Tagore, theroyn, Olzhas Zhumabek
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/atomic/"&gt;Graph&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Bug fixes:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fix bug in &lt;code&gt;&lt;span class="identifier"&gt;stoer_wagner_min_cut&lt;/span&gt;&lt;/code&gt;
where vertices are not merged at the end of each mincut phase
(&lt;a href="https://github.com/boostorg/graph/issues/286"&gt;#286&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix conversion warning for return type of &lt;code&gt;&lt;span class="identifier"&gt;strong_components&lt;/span&gt;&lt;/code&gt;
(&lt;a href="https://github.com/boostorg/graph/issues/293"&gt;#293&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix compilation failure of &lt;code&gt;&lt;span class="identifier"&gt;boykov_kolmogorov_max_flow&lt;/span&gt;&lt;/code&gt;
named parameter overload (&lt;a href="https://github.com/boostorg/graph/issues/232"&gt;#232&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
General code improvements:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Remove redundant call to &lt;code&gt;&lt;span class="identifier"&gt;combine&lt;/span&gt;&lt;/code&gt;
in &lt;code&gt;&lt;span class="identifier"&gt;astar_search_no_init_tree&lt;/span&gt;&lt;/code&gt;
(&lt;a href="https://github.com/boostorg/graph/issues/260"&gt;#260&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Remove redundant &lt;code&gt;&lt;span class="identifier"&gt;child_idx&lt;/span&gt;&lt;/code&gt;
argument of &lt;code&gt;&lt;span class="identifier"&gt;d_ary_heap_indirect&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;::&lt;/span&gt;&lt;span class="identifier"&gt;child&lt;/span&gt;&lt;/code&gt;
(&lt;a href="https://github.com/boostorg/graph/issues/261"&gt;#261&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improve documentation for traversal categories (&lt;a href="https://github.com/boostorg/graph/issues/303"&gt;#303&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Acknowledgements
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Viktor Pti, Sebastian Brockmeyer, Etienne dg
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/histogram/"&gt;Histogram&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed segfault in &lt;code&gt;&lt;span class="identifier"&gt;indexed&lt;/span&gt;&lt;/code&gt;
when trying to iterate over histogram with axes of zero size (physical
or logical) under certain conditions
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Removed previously deprecated API
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
class &lt;code&gt;&lt;span class="identifier"&gt;accumulators&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;thread_safe&lt;/span&gt;&lt;/code&gt;:
use &lt;code&gt;&lt;span class="identifier"&gt;accumulators&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;count&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;T&lt;/span&gt;&lt;span class="special"&gt;,&lt;/span&gt; &lt;span class="keyword"&gt;true&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Methods &lt;code&gt;&lt;span class="identifier"&gt;accumulators&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;sum&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;large&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;accumulators&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;sum&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;small&lt;/span&gt;&lt;/code&gt;:
use &lt;code&gt;&lt;span class="identifier"&gt;accumulators&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;sum&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;large_part&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;accumulators&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;sum&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;small_part&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Type alias &lt;code&gt;&lt;span class="identifier"&gt;algorithm&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;reduce_option&lt;/span&gt;&lt;/code&gt;:
use &lt;code&gt;&lt;span class="identifier"&gt;algorithm&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;reduce_command&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Template function &lt;code&gt;&lt;span class="identifier"&gt;axis&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;traits&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;static_options&lt;/span&gt;&lt;/code&gt;:
use &lt;code&gt;&lt;span class="identifier"&gt;axis&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;traits&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;get_options&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Template function &lt;code&gt;&lt;span class="identifier"&gt;axis&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;traits&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;static_is_inclusive&lt;/span&gt;&lt;/code&gt;:
use &lt;code&gt;&lt;span class="identifier"&gt;axis&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;traits&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;is_inclusive&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Type alias &lt;code&gt;&lt;span class="identifier"&gt;indexed&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;range_iterator&lt;/span&gt;&lt;/code&gt;:
use &lt;code&gt;&lt;span class="identifier"&gt;indexed&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;iterator&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Type alias &lt;code&gt;&lt;span class="identifier"&gt;indexed&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;accessor&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;reference&lt;/span&gt;&lt;/code&gt;:
use &lt;code&gt;&lt;span class="identifier"&gt;indexed&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;accessor&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;const_reference&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/iterator/"&gt;Iterator&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
For C++11 and later, added support for perfect forwarding of values
written to &lt;code&gt;&lt;span class="identifier"&gt;function_output_iterator&lt;/span&gt;&lt;/code&gt;.
(&lt;a href="https://github.com/boostorg/iterator/pull/73"&gt;PR#73&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added protection against writing to &lt;code&gt;&lt;span class="identifier"&gt;function_output_iterator&lt;/span&gt;&lt;/code&gt;
a result of dereferencing another &lt;code&gt;&lt;span class="identifier"&gt;function_output_iterator&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/json/"&gt;JSON&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added non-const &lt;code&gt;&lt;span class="identifier"&gt;value&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;at&lt;/span&gt;&lt;/code&gt;
overloads.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added the ability to manually choose endianness of the platform.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;string&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;subview&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;
overload.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed segfault in &lt;code&gt;&lt;span class="identifier"&gt;array&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;erase&lt;/span&gt;&lt;span class="special"&gt;(&lt;/span&gt;&lt;span class="identifier"&gt;it&lt;/span&gt;&lt;span class="special"&gt;)&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed low performance of &lt;code&gt;&lt;span class="identifier"&gt;serialize&lt;/span&gt;&lt;/code&gt;
on libc++.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed ambigious conversion to &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;string_view&lt;/span&gt;&lt;/code&gt;
on GCC 8.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed parsing on big-endian platforms.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed handling of comment after trailing comma.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/leaf/"&gt;LEAF&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
API breaking change: throw leaf::exception(....) now becomes leaf::throw_exception(....)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed a bug in support for a rare build configuration (exception
handling enabled, diagnostics disabled)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Using nullptr instead of 0 throughout
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed pedantic warnings
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/locale/"&gt;Locale&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Deprecated support for C++03 and earlier, C++11 will be required
in the next release
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Provide &lt;code&gt;&lt;span class="special"&gt;-&lt;/span&gt;&lt;span class="identifier"&gt;sICU_LINK_LOCALE&lt;/span&gt;&lt;/code&gt;
as a temporary replacement for &lt;code&gt;&lt;span class="special"&gt;-&lt;/span&gt;&lt;span class="identifier"&gt;sICU_LINK&lt;/span&gt;&lt;/code&gt; which is incompatible
with Boost.Regex. &lt;code&gt;&lt;span class="special"&gt;-&lt;/span&gt;&lt;span class="identifier"&gt;sICU_LINK_LOCALE&lt;/span&gt;&lt;/code&gt; and &lt;code&gt;&lt;span class="special"&gt;-&lt;/span&gt;&lt;span class="identifier"&gt;sICU_LINK&lt;/span&gt;&lt;/code&gt;
are deprecated and will be replaced by &lt;code&gt;&lt;span class="identifier"&gt;ICU_&lt;/span&gt;&lt;span class="special"&gt;*&lt;/span&gt;&lt;span class="identifier"&gt;_NAME&lt;/span&gt;&lt;/code&gt;
options to be compatible with Boost.Regex
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix UB/assertion failure in the ICU &lt;code&gt;&lt;span class="identifier"&gt;collator&lt;/span&gt;&lt;/code&gt;
implementation when transforming empty strings
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix some issues related to visibility of classes in shared libraries
(Unix only)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix compatibility with C++20 mode
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix compatibility with &lt;code&gt;&lt;span class="identifier"&gt;BOOST_USE_WINDOWS_H&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix build failures due to missing includes
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Handle or suppress many warnings which makes the build log cleaner
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/log/"&gt;Log&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Bug fixes:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed binding incorrect local address in UDP socket-based
&lt;code&gt;&lt;span class="identifier"&gt;syslog_backend&lt;/span&gt;&lt;/code&gt;
when IPv6 address is used for the syslog server. (&lt;a href="https://github.com/boostorg/log/issues/181"&gt;#181&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a workaround for a &lt;a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105857"&gt;bug&lt;/a&gt;
in libstdc++ from gcc 11.2. When &lt;code&gt;&lt;span class="identifier"&gt;max_size_decor&lt;/span&gt;&lt;/code&gt;
was used on a formatting stream, &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;codecvt&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;do_length&lt;/span&gt;&lt;/code&gt;
incorrectly accessed the input buffer and caused a buffer overflow.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
See &lt;a href="https://www.boost.org/libs/log/doc/html/log/changelog.html"&gt;changelog&lt;/a&gt;
for more details.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/math/"&gt;Math&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Deprecated C++11 support&lt;/strong&gt;: from 2023
we will require C++14 as a minimum standard. This will mean GCC-5
or MSVC-14.1 as a minimal requirement.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add &lt;code&gt;&lt;span class="keyword"&gt;constexpr&lt;/span&gt;&lt;/code&gt; fma support,
see &lt;a href="https://github.com/boostorg/math/pull/734"&gt;734&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add support for the Chatterjee Correlation Coefficient, see &lt;a href="https://github.com/boostorg/math/pull/770"&gt;770&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added support for the logarithm of the PDF for all the distributions.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improve support for building with no exception or RTTI support.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Some minor bug fixes for [sub 1]F[sub 1] corner cases, see &lt;a href="https://github.com/boostorg/math/pull/778"&gt;778&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/multiprecision/"&gt;Multiprecision&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Mark C++11 support as deprecated&lt;/strong&gt;:
from 2023 we will move to requiring C++14 as a minimum standard level.
That will drop support for GCC versions prior to 5 and MSVC prior
to 14.1.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix conflict between &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;cstdfloat&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;
and this library.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clean up lots of gcc and clang warnings.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix input streaming of composite types (complex, interval rational)
where there is a trailing delimeter in the stream and no whitespace.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix &lt;code&gt;&lt;span class="keyword"&gt;constexpr&lt;/span&gt;&lt;/code&gt; integer
square root where the input is 1, 2 or 3.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add missing &lt;code&gt;&lt;span class="preprocessor"&gt;#include&lt;/span&gt;&lt;/code&gt;
of &lt;code&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;memory&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt; to float128.hpp.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Correct 2-arg constructor for class &lt;code&gt;&lt;span class="identifier"&gt;number&lt;/span&gt;&lt;/code&gt;
to prevent ambiguity in some cases.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Correct and make more consistent behaviour of divide-by-zero in gmp.hpp.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/multi_index/"&gt;Multi-index Containers&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Maintenance work.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/nowide/"&gt;Nowide&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Major performance improvement for Bulk I/O with files
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;basic_filebuf&lt;/span&gt;&lt;/code&gt;: Fix
wrong return value of &lt;code&gt;&lt;span class="identifier"&gt;sync&lt;/span&gt;&lt;/code&gt;
when &lt;code&gt;&lt;span class="identifier"&gt;fflush&lt;/span&gt;&lt;/code&gt; failed
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;basic_filebuf&lt;/span&gt;&lt;/code&gt;: Fix
possible undefined behavior in a corner case when nothing was actually
written but buffer is in "write" mode
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;basic_filebuf&lt;/span&gt;&lt;/code&gt;: Limit
putback of characters (i.e. &lt;code&gt;&lt;span class="identifier"&gt;pbackfail&lt;/span&gt;&lt;/code&gt;)
only allowing putback of buffered characters (may be only 1 character)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/optional/"&gt;Optional&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added specializations for &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;hash&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;optional&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;T&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;. This is a breaking change
for programs that define such specializations themselves. For more
details see &lt;a href="https://www.boost.org/libs/optional/doc/html/boost_optional/reference/header__boost_optional_optional_hpp_/detailed_semantics___std__hash_specializations.html#reference_std_hash_spec"&gt;specs&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/stl_interfaces/"&gt;STLInterfaces&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fix &lt;a href="https://github.com/boostorg/stl_interfaces/issues/53"&gt;#53&lt;/a&gt;: "missing 'typename' prior to dependent
type name 'C::const_iterator'"
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix &lt;a href="https://github.com/boostorg/stl_interfaces/issues/54"&gt;#54&lt;/a&gt;: "Concept check fails on .data() of
a view on contiguous iterator_interface instantiations"
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
New additions to make it easy to write views and view adaptors that
work like, and interoperate with, the ones in the standard library:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Add workalikes for C++23's &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;bind_back&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; and &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;range_adaptor_closure&lt;/span&gt;&lt;/code&gt;
for pre-C++23 code.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add templates &lt;code&gt;&lt;span class="identifier"&gt;closure&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;adaptor&lt;/span&gt;&lt;/code&gt;
to make writing view adaptors easier, following the examples
in &lt;a href="https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2387r3.html"&gt;P2387&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/system/"&gt;System&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
When an &lt;code&gt;&lt;span class="identifier"&gt;error_code&lt;/span&gt;&lt;/code&gt;
is converted to &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;error_code&lt;/span&gt;&lt;/code&gt;
and then back to &lt;code&gt;&lt;span class="identifier"&gt;error_code&lt;/span&gt;&lt;/code&gt;,
the original is now restored, if possible.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Reworked the conversion from &lt;code&gt;&lt;span class="identifier"&gt;error_category&lt;/span&gt;&lt;/code&gt;
to &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;error_category&lt;/span&gt;&lt;/code&gt; to avoid the one-time
allocation that shows up on leak checkers.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a constructor that allows replacing the source location of
an &lt;code&gt;&lt;span class="identifier"&gt;error_code&lt;/span&gt;&lt;/code&gt;, and
a corresponding &lt;code&gt;&lt;span class="identifier"&gt;assign&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a converting constructor to &lt;code&gt;&lt;span class="identifier"&gt;result&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/unordered/"&gt;Unordered&lt;/a&gt;:&lt;/span&gt;
Major update:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://www.boost.org/libs/unordered/doc/html/unordered.html#buckets_fast_closed_addressing_implementation"&gt;Refactor&lt;/a&gt;
internal implementation to be dramatically faster
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Allow &lt;code&gt;&lt;span class="identifier"&gt;final&lt;/span&gt;&lt;/code&gt; &lt;code&gt;&lt;span class="identifier"&gt;Hasher&lt;/span&gt;&lt;/code&gt; and &lt;code&gt;&lt;span class="identifier"&gt;KeyEqual&lt;/span&gt;&lt;/code&gt;
objects
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Update documentation, adding benchmark graphs and notes on the new
internal data structures
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/utility/"&gt;Utility&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
In &lt;code&gt;&lt;span class="identifier"&gt;string_view&lt;/span&gt;&lt;/code&gt;/&lt;code&gt;&lt;span class="identifier"&gt;string_ref&lt;/span&gt;&lt;/code&gt;, fixed &lt;code&gt;&lt;span class="identifier"&gt;max_size&lt;/span&gt;&lt;/code&gt; returning incorrect value.
(&lt;a href="https://github.com/boostorg/utility/issues/91"&gt;#91&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Removed &lt;code&gt;&lt;span class="keyword"&gt;noexcept&lt;/span&gt;&lt;/code&gt; specifier
from &lt;code&gt;&lt;span class="identifier"&gt;string_view&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;compare&lt;/span&gt;&lt;/code&gt;
as it may throw on some input arguments. (&lt;a href="https://github.com/boostorg/utility/issues/94"&gt;#94&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
In &lt;code&gt;&lt;span class="identifier"&gt;string_view&lt;/span&gt;&lt;/code&gt;/&lt;code&gt;&lt;span class="identifier"&gt;string_ref&lt;/span&gt;&lt;/code&gt;, added support for calling
&lt;code&gt;&lt;span class="identifier"&gt;substr&lt;/span&gt;&lt;/code&gt; with no arguments.
(&lt;a href="https://github.com/boostorg/utility/issues/96"&gt;#96&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;string_view&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;contains&lt;/span&gt;&lt;/code&gt;
methods that were introduced in C++23. (&lt;a href="https://github.com/boostorg/utility/issues/93"&gt;#93&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
In &lt;code&gt;&lt;span class="identifier"&gt;string_view&lt;/span&gt;&lt;/code&gt;, added
asserts in &lt;code&gt;&lt;span class="identifier"&gt;remove_prefix&lt;/span&gt;&lt;/code&gt;/&lt;code&gt;&lt;span class="identifier"&gt;remove_suffix&lt;/span&gt;&lt;/code&gt; methods to enforce
the precondition that the prefix/suffix length does not exceed the
string view size. The previous (undocumented) behavior of silently
clamping the prefix/suffix length is deprecated and will be removed
in a future release. (&lt;a href="https://github.com/boostorg/utility/issues/92"&gt;#92&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/wave/"&gt;Wave&lt;/a&gt;:&lt;/span&gt;
Fixed bugs:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/wave/issues/24"&gt;#24&lt;/a&gt;: Line numbers wrong after conditional section
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/wave/issues/160"&gt;#160&lt;/a&gt;: one test fails with error C2660 and error C2440 under
msvc /permissive- mode
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/wave/issues/161"&gt;#161&lt;/a&gt;: BOOST_WAVE_THROW_NAME_CTX does not result in a context
callback and always throws
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/wave/issues/162"&gt;#162&lt;/a&gt;: When Boost headers are included in the preprocessed
translation unit, Wave fails in boost/integer.hpp(99)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_80_0.updated_tools"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Updated Tools&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/tools/build/"&gt;Build&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Includes release of &lt;a href="https://www.boost.org/tools/build/doc/html/#_version_4_9_2"&gt;B2
version 4.9.2&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_80_0.compilers_tested"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Compilers Tested&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
Boost's primary test compilers are:
&lt;/p&gt;
&lt;p&gt;
Boost's primary test compilers are:
&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Linux:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Clang: 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 12.0.0, 13.0.0, 14.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++11: 3.4, 11.0.0, 13.0.0, 14.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++14: 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 5.0, 12.0.0, 13.0.0,
14.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++17: 6.0.1, 7.0.0, 8.0.0, 9.0.0, 10.0.0, 11.0.0, 12.0.0,
13.0.0, 14.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++20: 11.0.0, 12.0.0, 13.0.0, 14.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC: 4.6.3, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++11: 4.7.3, 4.8.5, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++14: 5.4.0, 6.4.0, 7.3.0, 8.0.1, 9.1.0, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++17: 7.3.0, 8.0.1, 9.1.0, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++20: 8.0.1, 9.1.0, 10, 11, 12
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
OS X:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++11: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++14: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++17: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++20: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Windows:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Visual C++: 10.0, 11.0, 12.0, 14.0, 14.1, 14.2, 14.3
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_80_0.acknowledgements"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Acknowledgements&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
Marshall Clow, Michael Caisse and Glen Fernandes managed this release.
&lt;/p&gt;
&lt;/div&gt;
</description></item><item><title>Version 1.79.0</title><link>https://www.boost.org/users/history/version_1_79_0.html</link><guid>https://www.boost.org/users/history/version_1_79_0.html</guid><pubDate>Wed, 13 Apr 2022 14:22:59 +0000</pubDate><description>
&lt;div id="version_1_79_0.known_issues"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Known Issues&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
These are patches from library authors which were found too late to be fixed
in the release.
&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Boost.JSON &lt;code&gt;&lt;span class="identifier"&gt;array&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;erase&lt;/span&gt;&lt;/code&gt; can segfault, see &lt;a href="https://github.com/boostorg/json/issues/692"&gt;#692&lt;/a&gt;.
&lt;a href="https://www.boost.org/patches/1_79_0/0001-json-array-erase-relocate.patch"&gt;Patch&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_79_0.new_libraries"&gt;
&lt;h3&gt;&lt;span class="link"&gt;New Libraries&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
No new libraries.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_79_0.updated_libraries"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Updated Libraries&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/asio/"&gt;Asio&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;bind_allocator&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;file_base&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;sync_all_on_write&lt;/span&gt;&lt;/code&gt; flag.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added missing implementation of &lt;code&gt;&lt;span class="identifier"&gt;basic_file&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;release&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added per-operation cancellation support to signal sets.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Exposed &lt;code&gt;&lt;span class="identifier"&gt;recycling_allocator&lt;/span&gt;&lt;/code&gt;
as part of the public interface.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added the &lt;code&gt;&lt;span class="identifier"&gt;nodiscard&lt;/span&gt;&lt;/code&gt;
attribute to a number of functions.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added OpenSSL 3.0 compatibility.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added support for adopting an existing &lt;code&gt;&lt;span class="identifier"&gt;SSL&lt;/span&gt;&lt;span class="special"&gt;*&lt;/span&gt;&lt;/code&gt; into an &lt;code&gt;&lt;span class="identifier"&gt;ssl&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;stream&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Enabled &lt;code&gt;&lt;span class="identifier"&gt;executor_work_guard&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;&lt;/span&gt;&lt;/code&gt; in all build configurations.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Enabled movable socket iostreams when using clang.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;bind_cancellation_slot&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;bind_executor&lt;/span&gt;&lt;/code&gt;
compatibility with legacy completion tokens.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;associator&lt;/span&gt;&lt;/code&gt;
specialisations for &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;append&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;prepend&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;associated_allocator&lt;/span&gt;&lt;/code&gt;
primary template.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;tt&gt;io_uring&lt;/tt&gt; implementations of &lt;code&gt;&lt;span class="identifier"&gt;async_receive_from&lt;/span&gt;&lt;/code&gt; for sockets
and &lt;code&gt;&lt;span class="identifier"&gt;write_some_at&lt;/span&gt;&lt;/code&gt;
for files.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;tt&gt;io_uring&lt;/tt&gt; feature detection.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;coro&lt;/span&gt;&lt;/code&gt;'s
per-operation cancellation.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed memory management in &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;promise&lt;/span&gt;&lt;/code&gt;'s
type-erased completion handlers.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed move &lt;code&gt;&lt;span class="keyword"&gt;operator&lt;/span&gt;&lt;span class="special"&gt;=&lt;/span&gt;&lt;/code&gt; implementation for &lt;code&gt;&lt;span class="identifier"&gt;ssl&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;stream&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;any_io_executor&lt;/span&gt;&lt;/code&gt;
implementation to work when both &lt;code&gt;&lt;span class="identifier"&gt;BOOST_ASIO_USE_TS_EXECUTOR_AS_DEFAULT&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;BOOST_ASIO_SEPARATE_COMPILATION&lt;/span&gt;&lt;/code&gt;
are defined.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed implementation of &lt;code&gt;&lt;span class="identifier"&gt;basic_socket&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;at_mark&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; when using the &lt;code&gt;&lt;span class="identifier"&gt;sockatmark&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; system call.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed the recycling allocator to use the default alignment as the
minimum alignment for allocations.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a workaround for apparent coroutine codegen bug with Apple's
clang.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, changed the file support to open files using the same
sharing mode as &lt;code&gt;&lt;span class="identifier"&gt;fopen&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Linux, fixed UNIX domain sockets implementation to correctly handle
&lt;code&gt;&lt;span class="identifier"&gt;EAGAIN&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed implementation of &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;basic_channel&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;reset&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; and &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;basic_concurrent_channel&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;reset&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed potential undefined behaviour in the &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;promise&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed the &lt;code&gt;&lt;span class="identifier"&gt;co_spawn&lt;/span&gt;&lt;/code&gt;
implementation to dispatch cancellation signals through the executor
in some circumstances.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed various header inclusion issues.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed various warnings.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
A number of documentation enhancements, including:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added an overview of Asio's asynchronous model.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Reworked reference and requirements documentation in terms
of asynchronous model.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Updated documentation for &lt;code&gt;&lt;span class="identifier"&gt;dispatch&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;post&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;, and &lt;code&gt;&lt;span class="identifier"&gt;defer&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Documented per-operation cancellation for serial ports.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clarified the non-concurrency guarantees made for allocators.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Reverted the &lt;code&gt;&lt;span class="identifier"&gt;io_context&lt;/span&gt;&lt;/code&gt;
reference documentation to use &lt;code&gt;&lt;span class="identifier"&gt;executor_work_guard&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added more detailed reference documentation to &lt;code&gt;&lt;span class="identifier"&gt;make_strand&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;make_work_guard&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;ip&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;address_v4&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;ip&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;address_v6&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;basic_channel&lt;/span&gt;&lt;/code&gt;, and &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;basic_concurrent_channel&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Re-arranged and extended the Overview documentation to cover
recently added features.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a C++11 example showing file descriptor passing over local
sockets.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added C++14 examples of wrapping callback-based APIs in asynchronous
operations.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Consult the &lt;a href="https://www.boost.org/doc/libs/1_79_0/doc/html/boost_asio/history.html"&gt;Revision
History&lt;/a&gt; for further details.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/assert/"&gt;Assert&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;source_location&lt;/span&gt;&lt;span class="special"&gt;().&lt;/span&gt;&lt;span class="identifier"&gt;file_name&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;source_location&lt;/span&gt;&lt;span class="special"&gt;().&lt;/span&gt;&lt;span class="identifier"&gt;function_name&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt; now return &lt;code&gt;&lt;span class="string"&gt;""&lt;/span&gt;&lt;/code&gt;
instead of &lt;code&gt;&lt;span class="string"&gt;"(unknown)"&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a &lt;code&gt;&lt;span class="identifier"&gt;source_location&lt;/span&gt;&lt;/code&gt;
constructor from &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;source_location&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed &lt;code&gt;&lt;span class="identifier"&gt;BOOST_CURRENT_LOCATION&lt;/span&gt;&lt;/code&gt;
to more closely match the behavior of &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;source_location&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;current&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;, such as being usable at top level
or as a default function argument.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/atomic/"&gt;Atomic&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compilation for Universal Windows Platform (UWP). (&lt;a href="https://github.com/boostorg/atomic/issues/54"&gt;#54&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;BOOST_ATOMIC_NO_DARWIN_ULOCK&lt;/span&gt;&lt;/code&gt;
configuration macro. The macro affects compilation on Darwin systems
and disables &lt;code&gt;&lt;span class="identifier"&gt;ulock&lt;/span&gt;&lt;/code&gt;-based
implementation of waiting and notifying operations. This may be useful
to comply with Apple App Store requirements. (&lt;a href="https://github.com/boostorg/atomic/issues/55"&gt;#55&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/beast/"&gt;Beast&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added missing include for file_body test.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed WebSocket handshake response on failure.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed open append mode for &lt;code&gt;&lt;span class="identifier"&gt;file_posix&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;file_win32&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed file open with append/append_existing flag on Windows
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed clang-cl UTF8 path handling for &lt;code&gt;&lt;span class="identifier"&gt;file_win32&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;file_stdio&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added ARM64 builds to drone CI.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed async_base documentation link.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added tests for file open in append/append_existing mode.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Updated CI to include gcc 11, clang 12, msvc 14.3.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added individual tests to CMake workflow.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
We'd love to know how you or your company use Beast, consider adding
an entry to the &lt;a href="https://github.com/boostorg/beast/wiki/Companies-and-Individuals-Using-Beast"&gt;Companies
and Individuals Using Beast&lt;/a&gt; list.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
See the full &lt;a href="https://www.boost.org/libs/beast/doc/html/beast/release_notes.html"&gt;Release
Notes&lt;/a&gt; for a complete list of changes.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/core/"&gt;Core&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Made &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;pointer_traits&lt;/span&gt;&lt;/code&gt; SFINAE friendly,
addressing LWG3545. (Glen Fernandes)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;allocator_traits&lt;/span&gt;&lt;/code&gt; that uses the
individual allocator access traits. This implementation supports
C++03 and above. (Glen Fernandes)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Updated the allocator access traits to support most of the C++11
allocator model in C++03. (Glen Fernandes)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;iterator&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt; is deprecated and will be removed
in a future release. The header defines &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;iterator&lt;/span&gt;&lt;/code&gt;
template, which is equivalent to &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;iterator&lt;/span&gt;&lt;/code&gt;
in &lt;code&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;iterator&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt; header. However, since &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;iterator&lt;/span&gt;&lt;/code&gt; is itself deprecated in
C++17, users are advised to remove &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;iterator&lt;/span&gt;&lt;/code&gt;
or &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;iterator&lt;/span&gt;&lt;/code&gt; use from their code.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;verbose_terminate_handler&lt;/span&gt;&lt;/code&gt;, a utility
function intended to be passed to &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;set_terminate&lt;/span&gt;&lt;/code&gt;
that prints information about the uncaught exception to &lt;code&gt;&lt;span class="identifier"&gt;stderr&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/describe/"&gt;Describe&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Enabled unions in &lt;code&gt;&lt;span class="identifier"&gt;BOOST_DESCRIBE_STRUCT&lt;/span&gt;&lt;/code&gt;
and updated examples to check &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;is_union&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;T&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added example of defining a &lt;code&gt;&lt;span class="identifier"&gt;fmtlib&lt;/span&gt;&lt;/code&gt;
class formatter.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added example of defining a &lt;code&gt;&lt;span class="identifier"&gt;fmtlib&lt;/span&gt;&lt;/code&gt;
enum formatter.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added example of printing pointers to members.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/filesystem/"&gt;Filesystem&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;v3:&lt;/strong&gt; &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;replace_extension&lt;/span&gt;&lt;/code&gt;
now works in terms of &lt;strong&gt;v3&lt;/strong&gt; definition
of &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;extension&lt;/span&gt;&lt;/code&gt; rather than &lt;strong&gt;v4&lt;/strong&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compilation of path appending and concatenation operators with
arguments of types convertible to &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;/code&gt;
or compatible string type. (&lt;a href="https://github.com/boostorg/filesystem/issues/223"&gt;#223&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On POSIX systems that support &lt;code&gt;&lt;span class="identifier"&gt;fdopendir&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;O_NOFOLLOW&lt;/span&gt;&lt;/code&gt; and
on Windows, &lt;code&gt;&lt;span class="identifier"&gt;remove_all&lt;/span&gt;&lt;/code&gt;
is now protected against &lt;a href="https://www.cve.org/CVERecord?id=CVE-2022-21658"&gt;CVE-2022-21658&lt;/a&gt;.
The vulnerability is a race condition that allows a third party process
to replace a directory that is being concurrently processed by &lt;code&gt;&lt;span class="identifier"&gt;remove_all&lt;/span&gt;&lt;/code&gt; with a directory symlink
and cause &lt;code&gt;&lt;span class="identifier"&gt;remove_all&lt;/span&gt;&lt;/code&gt;
to follow the symlink and remove files in the linked directory instead
of removing the symlink itself. (&lt;a href="https://github.com/boostorg/filesystem/issues/224"&gt;#224&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, in &lt;code&gt;&lt;span class="identifier"&gt;remove&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;remove_all&lt;/span&gt;&lt;/code&gt; implementation,
use POSIX semantics for file removal, when supported by the OS (Windows
10 1709 and later). When POSIX semantics is supported, the file name
is removed from the filesystem namespace as soon as the file is marked
for deletion, even if it is still open and in use. With legacy Windows
semantics, the file name remains present in the the filesystem namespace
until the last file handle to the file is closed, which allows the
file marked for deletion to be opened and prevents creating new files
with the same name. (&lt;a href="https://github.com/boostorg/filesystem/issues/216"&gt;#216&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, &lt;code&gt;&lt;span class="identifier"&gt;remove&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;remove_all&lt;/span&gt;&lt;/code&gt; now
support deleting read-only directories. Support for removing read-only
non-directory files was added previously.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, &lt;code&gt;&lt;span class="identifier"&gt;directory_iterator&lt;/span&gt;&lt;/code&gt;
internal implementation has been reworked to better utilize modern
Windows APIs, which may improve performance while handling symlinks.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, initialize internal WinAPI function pointers early, if
possible, to allow Boost.Filesystem operations to be invoked in global
constructors. This is only supported on MSVC, GCC, Clang and compatible
compilers.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, &lt;code&gt;&lt;span class="identifier"&gt;resize_file&lt;/span&gt;&lt;/code&gt;
should no longer fail with an error if the file to be resized is
opened.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Disabled use of the &lt;code&gt;&lt;span class="identifier"&gt;statx&lt;/span&gt;&lt;/code&gt;
syscall on Android prior to 11.0 (API version 30). The syscall is
blacklisted by seccomp and causes process termination in runtime.
(&lt;a href="https://github.com/boostorg/filesystem/issues/229"&gt;#229&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Deprecated:&lt;/strong&gt; &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;filesystem&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;string_file&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;
header is deprecated and will be removed in a future release. The
header is no longer included by &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;filesystem&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;
by default. Users are advised to implement the functionality themselves
or migrate to other implementations.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Deprecated:&lt;/strong&gt; Windows CE support is
deprecated and will be removed in a future release. Windows CE has
been untested for many years and is likely non-functional.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/geometry/"&gt;Geometry&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Major change
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/977"&gt;PR#977&lt;/a&gt; Rescaling is turned off by default. This avoids
many related bugs in set operations and buffer.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improvements
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/923"&gt;PR#923&lt;/a&gt; Added algorithm closest_points for cartesian
point/geometry.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/939"&gt;PR#939&lt;/a&gt; Added algorithm closest_points for other coordinate
systems and geometry combinations excl. boxes.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/961"&gt;PR#961&lt;/a&gt; Added Web Mercator projection.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/966"&gt;PR#966&lt;/a&gt; More efficient cartesian distance strategy
used in simplify.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Solved issues
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/956"&gt;#956&lt;/a&gt; Result of simplify algorithm with incorrect
closure.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/962"&gt;#962&lt;/a&gt; Runtime error in R-tree deserialization due
to load factor.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/971"&gt;#971&lt;/a&gt; R-tree insertion time impacted by use of long
double on ARM platforms.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Bugfixes
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/936"&gt;PR#936&lt;/a&gt; Envelope of polygon containing pole.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/948"&gt;PR#948&lt;/a&gt; Spherical and geographic envelope for near
meridian segments.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/974"&gt;PR#974&lt;/a&gt; Spheroidal normalization utilities for NaN
coordinates.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Various fixes in set operations and buffer.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/integer/"&gt;Integer&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Optimized &lt;code&gt;&lt;span class="identifier"&gt;integer_log2&lt;/span&gt;&lt;/code&gt;
implementation to use bit operations internally. This allows to employ
bit instructions available on most modern CPUs. (&lt;a href="https://github.com/boostorg/integer/issues/31"&gt;#31&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/io/"&gt;IO&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;io&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;basic_nullbuf&lt;/span&gt;&lt;/code&gt;, a null stream buffer,
and &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;basic_onullstream&lt;/span&gt;&lt;/code&gt;, a null output
stream (Glen Fernandes).
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/iterator/"&gt;Iterator&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
In &lt;code&gt;&lt;span class="identifier"&gt;counting_iterator&lt;/span&gt;&lt;/code&gt;,
added support for built-in 128-bit integer types supported by gcc
and clang and compatible compilers on some target platforms.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Silenced gcc warnings about deprecated implicit copy assignment operator
in &lt;code&gt;&lt;span class="identifier"&gt;counting_iterator&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/json/"&gt;JSON&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Standalone mode of the library is removed. Users who wish to continue
using standalone JSON can switch to &lt;a href="https://github.com/CPPAlliance/standalone-json.git"&gt;the
C++ Alliance fork&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;error_code&lt;/span&gt;&lt;/code&gt; overloads.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;source_location&lt;/span&gt;&lt;/code&gt; to &lt;code&gt;&lt;span class="identifier"&gt;error_codes&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add support for JSON Pointer.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Naturally grow string during serialization.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/leaf/"&gt;LEAF&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Support for FreeRTOS and other embedded platforms
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improved diagnostic information
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improved configuration macros
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
BOOST_LEAF_CHECK using statement expressions under __GNUC__
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed symbol demangling bug
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/log/"&gt;Log&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
General changes:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
In &lt;code&gt;&lt;span class="identifier"&gt;text_file_backend&lt;/span&gt;&lt;/code&gt;,
added support for appending to a previously written log file,
when file rotation is used and log file names use file counters.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Breaking change:&lt;/strong&gt; The &lt;code&gt;&lt;span class="identifier"&gt;file_collector&lt;/span&gt;&lt;/code&gt; interface
has changed:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;scan_for_files&lt;/span&gt;&lt;/code&gt;
method returns a &lt;code&gt;&lt;span class="identifier"&gt;scan_result&lt;/span&gt;&lt;/code&gt;
structure that contains information collected during
the scan;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;is_in_storage&lt;/span&gt;&lt;/code&gt;
method added for testing if a path refers to a file within
the target storage directory.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a new &lt;code&gt;&lt;span class="identifier"&gt;invoke_manip&lt;/span&gt;&lt;/code&gt;
stream manipulator that can be used for injecting user's function
into a stream output expression.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Bug fixes:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed file counter being set to zero if the user calls &lt;code&gt;&lt;span class="identifier"&gt;text_file_backend&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;scan_for_files&lt;/span&gt;&lt;/code&gt; multiple times,
and the second and the following calls don't find any new files.
(&lt;a href="https://github.com/boostorg/log/issues/179"&gt;#179&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
See &lt;a href="https://www.boost.org/libs/log/doc/html/log/changelog.html"&gt;changelog&lt;/a&gt;
for more details.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/multi_index/"&gt;Multi-index Containers&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Improved the efficiency of &lt;code&gt;&lt;span class="identifier"&gt;count&lt;/span&gt;&lt;/code&gt;
operations in ranked indices from &lt;code&gt;&lt;span class="identifier"&gt;O&lt;/span&gt;&lt;span class="special"&gt;(&lt;/span&gt;&lt;span class="identifier"&gt;log&lt;/span&gt;&lt;span class="special"&gt;(&lt;/span&gt;&lt;span class="identifier"&gt;n&lt;/span&gt;&lt;span class="special"&gt;)&lt;/span&gt; &lt;span class="special"&gt;+&lt;/span&gt; &lt;span class="identifier"&gt;count&lt;/span&gt;&lt;span class="special"&gt;)&lt;/span&gt;&lt;/code&gt;
to &lt;code&gt;&lt;span class="identifier"&gt;O&lt;/span&gt;&lt;span class="special"&gt;(&lt;/span&gt;&lt;span class="identifier"&gt;log&lt;/span&gt;&lt;span class="special"&gt;(&lt;/span&gt;&lt;span class="identifier"&gt;n&lt;/span&gt;&lt;span class="special"&gt;))&lt;/span&gt;&lt;/code&gt;.
Contributed by Damian Sawicki.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Maintenance work.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/nowide/"&gt;Nowide&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fix compilation issues on some platforms (e.g. GCC 11 on MinGW-w64
and Cygwin)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix missing include when using &lt;code&gt;&lt;span class="identifier"&gt;BOOST_USE_WINDOWS_H&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;WIN32_LEAN_AND_MEAN&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add sanity check when using &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;nowide&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;stat&lt;/span&gt;&lt;/code&gt;
with &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;nowide&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;stat_t&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/optional/"&gt;Optional&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;a href="https://github.com/boostorg/optional/issues/98"&gt;issue
#98&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;a href="https://github.com/boostorg/optional/issues/92"&gt;issue
#92&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added support for &lt;code&gt;&lt;span class="identifier"&gt;BOOST_NO_IOSTREAM&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Now aligned storage uses &lt;code&gt;&lt;span class="keyword"&gt;unsigned&lt;/span&gt;
&lt;span class="keyword"&gt;char&lt;/span&gt;&lt;/code&gt; rather than &lt;code&gt;&lt;span class="keyword"&gt;char&lt;/span&gt;&lt;/code&gt; to avoid UB.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Now using cv-unqualified &lt;code&gt;&lt;span class="identifier"&gt;value_type&lt;/span&gt;&lt;/code&gt;
with placement &lt;code&gt;&lt;span class="keyword"&gt;new&lt;/span&gt;&lt;/code&gt; to
avoid UB.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/predef/"&gt;Predef&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Version 1.14.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add detection of LoongArch (from Zhang Na).
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/qvm/"&gt;QVM&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added constexpr under C++17
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improved single header distribution
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/smart_ptr/"&gt;Smart Pointers&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;get_allocator_pointer&lt;/span&gt;&lt;/code&gt; to obtain
the Allocator pointer from the result of &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;allocate_unique&lt;/span&gt;&lt;/code&gt;
(Glen Fernandes).
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/system/"&gt;System&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added a &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;source_location&lt;/span&gt;&lt;/code&gt; parameter to &lt;code&gt;&lt;span class="identifier"&gt;throw_exception_from_error&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;throw_exception_from_error&lt;/span&gt;&lt;/code&gt;
overloads for &lt;code&gt;&lt;span class="identifier"&gt;errc&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;errc_t&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;error_code&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;errc&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;exception_ptr&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;result&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;T&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;::&lt;/span&gt;&lt;span class="identifier"&gt;value&lt;/span&gt;&lt;/code&gt; now automatically supplies
&lt;code&gt;&lt;span class="identifier"&gt;BOOST_CURRENT_LOCATION&lt;/span&gt;&lt;/code&gt;
to &lt;code&gt;&lt;span class="identifier"&gt;throw_exception_from_error&lt;/span&gt;&lt;/code&gt;
via a default argument.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added an &lt;code&gt;&lt;span class="identifier"&gt;errc&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;make_error_code&lt;/span&gt;&lt;/code&gt; overload taking
a source location.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/throw_exception/"&gt;ThrowException&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;throw_with_location&lt;/span&gt;&lt;/code&gt;, a more lightweight
alternative of &lt;code&gt;&lt;span class="identifier"&gt;BOOST_THROW_EXCEPTION&lt;/span&gt;&lt;/code&gt;
for programs that do not use Boost.Exception.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/unordered/"&gt;Unordered&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
All containers have been updated to support heterogeneous &lt;code&gt;&lt;span class="identifier"&gt;count&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;equal_range&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;find&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
All containers now implement the member function &lt;code&gt;&lt;span class="identifier"&gt;contains&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;erase_if&lt;/span&gt;&lt;/code&gt; has been
implemented for all containers.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
All containers have been updated to support heterogeneous &lt;code&gt;&lt;span class="identifier"&gt;erase&lt;/span&gt;&lt;/code&gt; and &lt;code&gt;&lt;span class="identifier"&gt;extract&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed behavior of &lt;code&gt;&lt;span class="identifier"&gt;reserve&lt;/span&gt;&lt;/code&gt;
to eagerly allocate.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Various warning fixes in the test suite.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Update code to internally use &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;allocator_traits&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Switch to Fibonacci hashing.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Update documentation to be written in AsciiDoc instead of QuickBook.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/variant2/"&gt;Variant2&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="keyword"&gt;operator&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;lt;&lt;/span&gt;&lt;/code&gt;
for &lt;code&gt;&lt;span class="identifier"&gt;monostate&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/wave/"&gt;Wave&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
C++11 now required for building Wave itself
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed bugs:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/wave/issues/135"&gt;#135&lt;/a&gt;: Comma operators in array subscripts are deprecated
in C++20
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/wave/issues/137"&gt;#137&lt;/a&gt;: Simple unknown directive =&amp;gt; found_unknown_directive
is not called, stripped of pound.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/wave/issues/138"&gt;#138&lt;/a&gt;: Empty ifdef block does not emit line directive
for missing whitespace
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/wave/issues/143"&gt;#143&lt;/a&gt;: Parsing __has_include() fails with trailing tokens
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/wave/issues/145"&gt;#145&lt;/a&gt;: Sanitizer complains about reset_version()
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/wave/issues/147"&gt;#147&lt;/a&gt;: bitwise operations between different enumeration
types are deprecated
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_79_0.updated_tools"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Updated Tools&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/tools/build/"&gt;Build&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Includes release of &lt;a href="https://www.boost.org/tools/build/doc/html/#_version_4_8_2"&gt;B2
version 4.8.2&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_79_0.compilers_tested"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Compilers Tested&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
Boost's primary test compilers are:
&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Linux:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Clang: 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 12.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++11: 3.4, 11.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++14: 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 5.0, 12.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++17: 6.0.1, 7.0.0, 8.0.0, 9.0.0, 10.0.0, 11.0.0, 12.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++20: 11.0.0, 12.0.0, 13.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC: 4.6.3, 11
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++11: 4.7.3, 4.8.5, 11
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++14: 5.4.0, 6.4.0, 7.3.0, 8.0.1, 9.1.0, 11
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++17: 7.3.0, 8.0.1, 9.1.0, 11
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++20: 8.0.1, 9.1.0, 10, 11
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
OS X:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++11: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++14: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++17: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++20: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Windows:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Visual C++: 10.0, 11.0, 12.0, 14.0, 14.1, 14.2
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_79_0.acknowledgements"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Acknowledgements&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
Marshall Clow, Michael Caisse and Glen Fernandes managed this release.
&lt;/p&gt;
&lt;/div&gt;
</description></item><item><title>Version 1.78.0</title><link>https://www.boost.org/users/history/version_1_78_0.html</link><guid>https://www.boost.org/users/history/version_1_78_0.html</guid><pubDate>Wed, 08 Dec 2021 03:45:49 +0000</pubDate><description>
&lt;div id="version_1_78_0.known_issues"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Known Issues&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
These are patches from library authors which were found too late to be fixed
in the release.
&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Boost.Build silently skips installation of library headers and binaries
in some cases, see &lt;a href="https://github.com/bfgroup/b2/issues/104"&gt;#104&lt;/a&gt;.
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed in &lt;a href="https://github.com/bfgroup/b2/pull/113"&gt;PR#113&lt;/a&gt;,
&lt;a href="https://www.boost.org/patches/1_78_0/0001-b2-fix-install.patch"&gt;patch&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Boost.Atomic fails to build when targeting UWP, see &lt;a href="https://github.com/boostorg/atomic/issues/54"&gt;#54&lt;/a&gt;. &lt;a href="https://www.boost.org/patches/1_78_0/0002-atomic-fix-uwp-build.patch"&gt;Patch&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_78_0.new_libraries"&gt;
&lt;h3&gt;&lt;span class="link"&gt;New Libraries&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
No new libraries.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_78_0.updated_libraries"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Updated Libraries&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/asio/"&gt;Asio&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added an io_uring backend that may optionally be used for all I/O
objects, including sockets, timers, and posix descriptors.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added support for files, with new new classes for stream-oriented
and random-access files. This feature currently supports I/O completion
ports on Windows, and io_uring on Linux.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added support for portable pipes on POSIX and Windows (when I/O completion
ports are available).
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added support for registered buffers, which are optimised when using
the io_uring backend.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added experimental support for channels, that may be used to send
and queue completions as messages.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Implemented improvements to &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;coro&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Disabled &lt;code&gt;&lt;span class="identifier"&gt;aligned_alloc&lt;/span&gt;&lt;/code&gt;
on &lt;tt&gt;clang&lt;/tt&gt; when using an MSVC runtime.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Changed to use a faster implementation for &lt;code&gt;&lt;span class="identifier"&gt;ip&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;network_v4&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;canonical&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added template specialisations for common uses to improve compile
time.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Reduced the size of &lt;code&gt;&lt;span class="identifier"&gt;io_context&lt;/span&gt;&lt;/code&gt;
executors to a single pointer.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Increased the small object buffer size for &lt;code&gt;&lt;span class="identifier"&gt;execution&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;any_executor&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;any_io_executor&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed multi-signature handling when variadic templates are disabled.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compatibility with new versions of &lt;tt&gt;gcc&lt;/tt&gt; and
&lt;tt&gt;clang&lt;/tt&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compilation on Solaris.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed defence against Qt-defined macros when building with MSVC.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improved error messages emitted by &lt;code&gt;&lt;span class="identifier"&gt;ssl&lt;/span&gt;&lt;/code&gt;
facilities.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed &lt;code&gt;&lt;span class="identifier"&gt;bind_executor&lt;/span&gt;&lt;/code&gt;
compatibility with completion tokens.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed build errors when &lt;code&gt;&lt;span class="identifier"&gt;BOOST_ASIO_USE_TS_EXECUTOR_AS_DEFAULT&lt;/span&gt;&lt;/code&gt;
is defined.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added missing move assignment operator to &lt;code&gt;&lt;span class="identifier"&gt;awaitable&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;gt;&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed an access violation when using coroutines with MSVC, due to
incorrect alignment of allocated memory.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed a cleanup issue in &lt;code&gt;&lt;span class="identifier"&gt;experimental&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;parallel_group&lt;/span&gt;&lt;/code&gt;
that occured when the execution context was shut down with parallel
operations still pending.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added clarifications to the documentation on concurrency hints.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added documentation on error handling techniques for C++20 coroutines.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed various warnings.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Consult the &lt;a href="https://www.boost.org/doc/libs/1_78_0/doc/html/boost_asio/history.html"&gt;Revision
History&lt;/a&gt; for further details.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/assert/"&gt;Assert&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;source_location&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;to_string&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/atomic/"&gt;Atomic&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Use process-local futex operations on Android for non-IPC waiting
and notifying operations.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added support for Linux targets that only define &lt;code&gt;&lt;span class="identifier"&gt;SYS_futex_time64&lt;/span&gt;&lt;/code&gt;
syscall, such as riscv32.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a workaround for incorrect result of &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;alignment_of&lt;/span&gt;&lt;/code&gt;
on clang 8 for 64-bit types on 32-bit x86 targets.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a ulock backend for waiting and notifying operations on Darwin
systems since Mac OS 10.12, iOS 10.0, tvOS 10.0 or watchOS 3.0.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, corrected discrepancy between &lt;tt&gt;&lt;em&gt;atomic-type&lt;/em&gt;::always_has_native_wait_notify&lt;/tt&gt;
and the corresponding capability macros when targeting Windows 8
or later. The library will now directly use &lt;code&gt;&lt;span class="identifier"&gt;WaitOnAddress&lt;/span&gt;&lt;/code&gt;
and related APIs from public headers and therefore require user to
link with &lt;code&gt;&lt;span class="identifier"&gt;synchronization&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;lib&lt;/span&gt;&lt;/code&gt;
if the user requires Windows 8 or later by defining &lt;code&gt;&lt;span class="identifier"&gt;BOOST_USE_WINAPI_VERSION&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;_WIN32_WINNT&lt;/span&gt;&lt;/code&gt; or similar macros.
The library is linked automatically on compilers that support auto-linking
(e.g. MSVC).
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added support for types with padding bits, except unions, on compilers
that provide a way to clear the padding bits. This feature is supported
by gcc 11 and MSVC 14.2 (compiler version 19.27) and newer, as well
as other compilers supporting similar intrinsics. On compilers that
don't allow to clear the padding bits, types with padding are still
generally not supported with the exception of 80-bit &lt;code&gt;&lt;span class="keyword"&gt;long&lt;/span&gt; &lt;span class="keyword"&gt;double&lt;/span&gt;&lt;/code&gt;
on x86 targets. A new &lt;code&gt;&lt;span class="identifier"&gt;BOOST_ATOMIC_NO_CLEAR_PADDING&lt;/span&gt;&lt;/code&gt;
capability macro is defined to indicate when clearing the padding
is not supported.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Initializing constructors of &lt;code&gt;&lt;span class="identifier"&gt;atomic_ref&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;ipc_atomic_ref&lt;/span&gt;&lt;/code&gt;
no longer use atomic instructions to clear the padding bits in the
referenced object. This reduces the cost of the atomic reference
construction.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Initializing constructors of &lt;code&gt;&lt;span class="identifier"&gt;atomic&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;ipc_atomic&lt;/span&gt;&lt;/code&gt; are
now &lt;code&gt;&lt;span class="keyword"&gt;constexpr&lt;/span&gt;&lt;/code&gt; for enums,
classes and floating point types. For classes and floating point
types, the constructors are &lt;code&gt;&lt;span class="keyword"&gt;constexpr&lt;/span&gt;&lt;/code&gt;
if the compiler supports &lt;code&gt;&lt;span class="keyword"&gt;constexpr&lt;/span&gt;&lt;/code&gt;
&lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;bit_cast&lt;/span&gt;&lt;/code&gt;, the type has no padding
bytes and no padding is required to implement native atomic operations.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
In accordance with C++20, default constructors of &lt;code&gt;&lt;span class="identifier"&gt;atomic&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;ipc_atomic&lt;/span&gt;&lt;/code&gt; now
perform value initialization of the contained object. For types without
a user-defined default constructor, this means the default-constructed
atomic will be zero-initialized.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a workaround for compilation error on AIX caused by the assembler
tool not supporting numeric labels. (&lt;a href="https://github.com/boostorg/atomic/pull/50"&gt;PR#50&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a workaround for compilation error with Visual Studio 2015
prior to Update 3. (&lt;a href="https://github.com/boostorg/atomic/issues/52"&gt;#52&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
See &lt;a href="https://www.boost.org/doc/html/atomic/changelog.html"&gt;changelog&lt;/a&gt;
for more details.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/beast/"&gt;Beast&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
This maintenance update brings minor bug fixes and updated CI reporting.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed security vulnerability CVE-2016-9840 in zlib implementation.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed WebSocket permessage_deflate implementation. This should result
in an increase in compression performance when using Beast WebSockets.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Removed the test stream and test framework's dependency on RTTI.
You can now use our handy test stream to check your embedded asynchronous
communications code!
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
We'd love to know how you or your company use Beast, consider adding
an entry to the &lt;a href="https://github.com/boostorg/beast/wiki/Companies-and-Individuals-Using-Beast"&gt;Companies
and Individuals Using Beast&lt;/a&gt; list.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
See the full &lt;a href="https://www.boost.org/libs/beast/doc/html/beast/release_notes.html"&gt;Release
Notes&lt;/a&gt; for a complete list of changes.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/core/"&gt;Core&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added a generic implementation to &lt;code&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;cmath&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;,
enabled when &lt;code&gt;&lt;span class="identifier"&gt;BOOST_CORE_USE_GENERIC_CMATH&lt;/span&gt;&lt;/code&gt;
is defined or when the platform does not provide the necessary facilities
in &lt;code&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;cmath&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;core&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;type_name&lt;/span&gt;&lt;/code&gt;, a utility function that
returns the name of a type as a string.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;span&lt;/span&gt;&lt;/code&gt;, a C++11 implementation of
C++20's &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;span&lt;/span&gt;&lt;/code&gt; (Glen Fernandes).
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/describe/"&gt;Describe&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;has_describe_enumerators&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;has_describe_bases&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;has_describe_members&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;enum_to_string&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;enum_from_string&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added relational and stream insertion operators.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;descriptor_by_name&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;descriptor_by_pointer&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/dll/"&gt;DLL&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed missing #include, thanks to Denis Blank (&lt;a href="https://github.com/boostorg/dll/pull/54"&gt;PR#54&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Dropped TravisCI in favor of GithubAction CI
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/filesystem/"&gt;Filesystem&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;v4:&lt;/strong&gt; &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;filename&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;iterator&lt;/span&gt;&lt;/code&gt; no longer return an implicit
trailing dot (".") element if the path ends with a directory
separator. Instead, an empty path is returned, similar to C++17 std::filesystem.
This also affects other methods that are defined in terms of iterators
or filename, such as &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;stem&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;compare&lt;/span&gt;&lt;/code&gt; or &lt;code&gt;&lt;span class="identifier"&gt;lexicographical_compare&lt;/span&gt;&lt;/code&gt;.
For example, &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;(&lt;/span&gt;&lt;span class="string"&gt;"a/b/"&lt;/span&gt;&lt;span class="special"&gt;)&lt;/span&gt; &lt;span class="special"&gt;==&lt;/span&gt; &lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;(&lt;/span&gt;&lt;span class="string"&gt;"a/b/."&lt;/span&gt;&lt;span class="special"&gt;)&lt;/span&gt;&lt;/code&gt;
no longer holds true. (&lt;a href="https://github.com/boostorg/filesystem/issues/193"&gt;#193&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;v4:&lt;/strong&gt; &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;lexically_normal&lt;/span&gt;&lt;/code&gt;
no longer produce a trailing dot (".") element and omits
a directory separator after a trailing dot-dot ("..") element
in the normalized paths.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;v4:&lt;/strong&gt; &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;/code&gt;
append operations now consider root name and root directory in the
appended path. If the appended path is absolute, or root name is
present and differs from the source path, the resulting path is equivalent
to the appended path. If root directory is present, the result is
the root directory and relative path rebased on top of the root name
of the source path. Otherwise, the behavior is similar to v3. (&lt;a href="https://github.com/boostorg/filesystem/issues/214"&gt;#214&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;lexically_normal&lt;/span&gt;&lt;/code&gt; now converts directory
separators to preferred separators in the root name of the normalized
paths.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Optimized overloads of &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;assign&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;append&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;concat&lt;/span&gt;&lt;/code&gt;
and the corresponding operators to avoid unnecessary path copying
and reduce the amount of code redundancy.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On POSIX systems, fixed &lt;code&gt;&lt;span class="identifier"&gt;absolute&lt;/span&gt;&lt;span class="special"&gt;(&lt;/span&gt;&lt;span class="identifier"&gt;p&lt;/span&gt;&lt;span class="special"&gt;,&lt;/span&gt; &lt;span class="identifier"&gt;base&lt;/span&gt;&lt;span class="special"&gt;)&lt;/span&gt;&lt;/code&gt; returning a path with root name
&lt;code&gt;&lt;span class="identifier"&gt;base&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;root_name&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;
if &lt;code&gt;&lt;span class="identifier"&gt;p&lt;/span&gt;&lt;/code&gt; starts with
a root directory. In such a case &lt;code&gt;&lt;span class="identifier"&gt;p&lt;/span&gt;&lt;/code&gt;
is already an absolute path and should be returned as is.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;create_directories&lt;/span&gt;&lt;/code&gt;
no longer reports an error if the input path consists entirely of
dot (".") and dot-dot ("..") elements. The implementation
is no longer using recursion internally and therefore is better protected
from stack overflow on extremely long paths.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, &lt;code&gt;&lt;span class="identifier"&gt;remove&lt;/span&gt;&lt;/code&gt;
now supports deleting read-only files. The operation will attempt
to reset the read-only attribute prior to removal. Note that this
introduces a possibility of the read-only attribute being left unset,
if the operation fails and the original value of the attribute fails
to be restored. This also affects &lt;code&gt;&lt;span class="identifier"&gt;remove_all&lt;/span&gt;&lt;/code&gt;.
(&lt;a href="https://github.com/boostorg/filesystem/issues/216"&gt;#216&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;remove_all&lt;/span&gt;&lt;/code&gt; now returns
&lt;code&gt;&lt;span class="keyword"&gt;static_cast&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;
&lt;span class="identifier"&gt;uintmax_t&lt;/span&gt; &lt;span class="special"&gt;&amp;gt;(-&lt;/span&gt;&lt;span class="number"&gt;1&lt;/span&gt;&lt;span class="special"&gt;)&lt;/span&gt;&lt;/code&gt;
in case of error, similar to C++17 std::filesystem.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed a linking error about unresolved references to Boost.ContainerHash
functions when user's code includes &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;filesystem&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;path&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt;
but not &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;container_hash&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;hash&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;/code&gt; and the compiler is set to
preserve unused inline functions. (&lt;a href="https://github.com/boostorg/filesystem/issues/215"&gt;#215&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a workaround for MSVC and compatible compilers eliminating
path globals cleanup in release builds. This could lead to a memory
leak if Boost.Filesystem shared library was repeatedly loaded and
unloaded in the process. (&lt;a href="https://github.com/boostorg/filesystem/issues/217"&gt;#217&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/geometry/"&gt;Geometry&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Improvements
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/894"&gt;PR#894&lt;/a&gt; Optimization and refactoring of rtree queries.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/913"&gt;PR#913&lt;/a&gt; DynamicGeometry and GeometryCollection support
in various algorithms (undocumented for now).
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/922"&gt;PR#922&lt;/a&gt; DynamicGeometry and GeometryCollection support
in distance (undocumented for now).
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Solved issues
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/867"&gt;#867&lt;/a&gt; Poor performance of rtree query iterator with
nearest predicate for big k.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/870"&gt;#870&lt;/a&gt; Compilation error in boost::geometry::self_turns.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/issues/896"&gt;#896&lt;/a&gt; Assertion failure in get_turns with BOOST_GEOMETRY_NO_ROBUSTNESS.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Bugfixes
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/906"&gt;PR#906&lt;/a&gt; Invalid result of buffer on macos-11 with
clang-12.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;a href="https://github.com/boostorg/geometry/pull/921"&gt;PR#921&lt;/a&gt; Compilation errors with c++20 (various compilers)
and gcc-5.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Various fixes in set operations and buffer.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/json/"&gt;JSON&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Standalone mode of the library is deprecated.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Allow external libraries to forward declare &lt;code&gt;&lt;span class="identifier"&gt;value_to&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;value_from&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed signed integer overflow in number parsing.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add support for &lt;code&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;Zc&lt;/span&gt;&lt;span class="special"&gt;:&lt;/span&gt;&lt;span class="identifier"&gt;implicitNoexcept&lt;/span&gt;&lt;span class="special"&gt;-&lt;/span&gt;&lt;/code&gt; on MSVC.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/lambda2/"&gt;Lambda2&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added special cases in &lt;code&gt;&lt;span class="keyword"&gt;operator&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;lt;&lt;/span&gt;&lt;/code&gt; and &lt;code&gt;&lt;span class="keyword"&gt;operator&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&amp;gt;&lt;/span&gt;&lt;/code&gt; when the first argument is
a stream, to allow &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;cout&lt;/span&gt;
&lt;span class="special"&gt;&amp;lt;&amp;lt;&lt;/span&gt; &lt;span class="identifier"&gt;_1&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="keyword"&gt;operator&lt;/span&gt;&lt;span class="special"&gt;-&amp;gt;*&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;first&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;second&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/log/"&gt;Log&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
General changes:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Updated detection of &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;codecvt&lt;/span&gt;&lt;/code&gt;
specializations for &lt;code&gt;&lt;span class="keyword"&gt;char16_t&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="keyword"&gt;char32_t&lt;/span&gt;&lt;/code&gt; for
compatibility with C++17 and later. (&lt;a href="https://github.com/boostorg/log/pull/159"&gt;PR#159&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added support for C++17 &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;byte&lt;/span&gt;&lt;/code&gt;
type to receive methods of the inter-process message queue.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
On Windows, when building the library for Windows 8 or later,
the library will use &lt;code&gt;&lt;span class="identifier"&gt;nt62&lt;/span&gt;&lt;/code&gt;
tag in the version namespace to denote the target OS ABI. For
example, the version namespace could be named as &lt;code&gt;&lt;span class="identifier"&gt;v2_mt_nt62&lt;/span&gt;&lt;/code&gt;. This name will
be part of all symbols exported by the library. Use the &lt;code&gt;&lt;span class="identifier"&gt;BOOST_USE_WINAPI_VERSION&lt;/span&gt;&lt;/code&gt;
macro consistenly when building Boost and your code to request
the minimum target Windows version.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improved performance of SSSE3 and AVX2 implementations of the
&lt;code&gt;&lt;span class="identifier"&gt;dump&lt;/span&gt;&lt;/code&gt; stream
manipulator.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added support for CMake build system. Only library build is
supported at this moment, Boost.Build is still used for running
tests.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Bug fixes:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Fixed a race condition on POSIX systems in &lt;code&gt;&lt;span class="identifier"&gt;reliable_message_queue&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;open_or_create&lt;/span&gt;&lt;/code&gt;
or the equivalent constructor. Multiple threads or processes
calling &lt;code&gt;&lt;span class="identifier"&gt;open_or_create&lt;/span&gt;&lt;/code&gt;
concurrently with sending or receiving messages from the same
queue could end up corrupting the queue contents and potentially
crashing the process. (&lt;a href="https://github.com/boostorg/log/issues/162"&gt;#162&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added a workaround for &lt;code&gt;&lt;span class="identifier"&gt;b2&lt;/span&gt;
&lt;span class="identifier"&gt;install&lt;/span&gt;&lt;/code&gt; failing on
Windows because of missing &lt;code&gt;&lt;span class="identifier"&gt;boost_log_setup&lt;/span&gt;&lt;/code&gt;
library if &lt;code&gt;&lt;span class="identifier"&gt;BOOST_LOG_WITHOUT_SETTINGS_PARSERS&lt;/span&gt;&lt;/code&gt;
is defined. (&lt;a href="https://github.com/boostorg/log/issues/164"&gt;#164&lt;/a&gt;)
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
See &lt;a href="https://www.boost.org/libs/log/doc/html/log/changelog.html"&gt;changelog&lt;/a&gt;
for more details.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/math/"&gt;Math&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Add support for cubic roots.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add support for &lt;code&gt;&lt;span class="keyword"&gt;constexpr&lt;/span&gt;&lt;/code&gt;
versions of various standard library math routines.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add support for Bezier polynomials.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improve worst-case tanh-sinh integration performance.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Disable inadvertant use of integral types in integration routines.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Minor update for erf approximations when the result is with 2ulp
of 1.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Allow Bernoulli code to be used on platforms with no atomic integers.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improve the mode of the non-central Chi Squared distribution.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Improve certain edge cases for &amp;lt;cstdfloat&amp;gt; complex-valued elementary
functions, see &lt;a href="https://github.com/boostorg/math/issues/507"&gt;#507&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/multi_index/"&gt;Multi-index Containers&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;contains&lt;/span&gt;&lt;/code&gt; to
key-based indices (issue &lt;a href="https://github.com/boostorg/multi_index/issues/35"&gt;#35&lt;/a&gt;).
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;merge&lt;/span&gt;&lt;/code&gt; operations
to key-based indices. The functionality goes beyond the standard
specification for (unordered) associative containers in a number
of ways, most notably:
&lt;/div&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
The source index can be of any type, including non key-based
indices.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Partial merge is provided: for instance, &lt;code&gt;&lt;span class="identifier"&gt;x&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;merge&lt;/span&gt;&lt;span class="special"&gt;(&lt;/span&gt;&lt;span class="identifier"&gt;y&lt;/span&gt;&lt;span class="special"&gt;,&lt;/span&gt;&lt;span class="identifier"&gt;first&lt;/span&gt;&lt;span class="special"&gt;,&lt;/span&gt;&lt;span class="identifier"&gt;last&lt;/span&gt;&lt;span class="special"&gt;)&lt;/span&gt;&lt;/code&gt; merges only the elements of
&lt;code&gt;&lt;span class="identifier"&gt;y&lt;/span&gt;&lt;/code&gt; within [&lt;code&gt;&lt;span class="identifier"&gt;first&lt;/span&gt;&lt;/code&gt;,&lt;code&gt;&lt;span class="identifier"&gt;last&lt;/span&gt;&lt;/code&gt;).
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Previous versions of &lt;code&gt;&lt;span class="identifier"&gt;splice&lt;/span&gt;&lt;/code&gt;
for sequenced and random access indices were destructive, i.e. elements
were copy-inserted into the destination and then erased from the
source. Now, &lt;code&gt;&lt;span class="identifier"&gt;splice&lt;/span&gt;&lt;/code&gt;
is based on node transfer much as &lt;code&gt;&lt;span class="identifier"&gt;merge&lt;/span&gt;&lt;/code&gt;
in key-based indices, and has been similarly extended to accept source
indices of any type: in fact, &lt;code&gt;&lt;span class="identifier"&gt;splice&lt;/span&gt;&lt;/code&gt;
can be regarded as a frontend to the same functionality provided
by &lt;code&gt;&lt;span class="identifier"&gt;merge&lt;/span&gt;&lt;/code&gt; in key-based
indices. For reasons of backwards compatibility, the destructive
behavior of &lt;code&gt;&lt;span class="identifier"&gt;splice&lt;/span&gt;&lt;/code&gt;
has been retained in the case that the source and destination containers
have unequal allocators.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
The fact has been documented that index iterator types do only depend
on &lt;code&gt;&lt;span class="identifier"&gt;node_type&lt;/span&gt;&lt;/code&gt; and
the position of the index in its &lt;code&gt;&lt;span class="identifier"&gt;multi_index_container&lt;/span&gt;&lt;/code&gt;,
(except for hashed indices, where uniqueness/non-uniqueness is also
a dependency). This has implications on the validity of iterators
to elements transferred by &lt;code&gt;&lt;span class="identifier"&gt;merge&lt;/span&gt;&lt;/code&gt;
or &lt;code&gt;&lt;span class="identifier"&gt;splice&lt;/span&gt;&lt;/code&gt;. This property
is a variant of what has been called &lt;a href="https://wg21.link/n2980"&gt;SCARY
iterators&lt;/a&gt; in the C++ standard mailing lists. SCARYness is
currently (August 2021) not mandated for standard containers.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Iterator SCARYness is now also preserved in &lt;a href="https://www.boost.org/libs/multi_index/doc/tutorial/debug.html#safe_mode"&gt;safe
mode&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/multiprecision/"&gt;Multiprecision&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Rework rational_adaptor to remove dependency on Boost.Rational and
improve performance.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix issue with type_traits and clang, see &lt;a href="https://github.com/boostorg/multiprecision/issues/383"&gt;#383&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed buggy Lehmer's GCD routine, see &lt;a href="https://github.com/boostorg/multiprecision/issues/370"&gt;#370&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix mpc_complex constructors so that lossy conversions are explicit,
see &lt;a href="https://github.com/boostorg/multiprecision/issues/363"&gt;#363&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Correct miscellaneous configuration issues (Intel intrinsic usage
and Apple clang).
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Correct some iostream operators for unsigned char types.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Correct mpq_rational conversions to integer types, see &lt;a href="https://github.com/boostorg/multiprecision/issues/342"&gt;#342&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/nowide/"&gt;Nowide&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Breaking Change: &lt;code&gt;&lt;span class="identifier"&gt;do_unshift&lt;/span&gt;&lt;/code&gt;
for the UTF-32 specialization of &lt;code&gt;&lt;span class="identifier"&gt;utf8_codecvt&lt;/span&gt;&lt;/code&gt;
now correctly returns &lt;code&gt;&lt;span class="identifier"&gt;noconv&lt;/span&gt;&lt;/code&gt;
instead of &lt;code&gt;&lt;span class="identifier"&gt;ok&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Remove unnecessary branch in &lt;code&gt;&lt;span class="identifier"&gt;utf8_codecvt&lt;/span&gt;&lt;/code&gt;
for UTF-16 output
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Suppress deprecation warnings in MSVC when using &lt;code&gt;&lt;span class="identifier"&gt;utf8_codecvt&lt;/span&gt;&lt;/code&gt;
with unicode char types
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix possible double-free when setting a custom buffer (&lt;code&gt;&lt;span class="identifier"&gt;setbuf&lt;/span&gt;&lt;/code&gt;) after &lt;code&gt;&lt;span class="identifier"&gt;filebuf&lt;/span&gt;&lt;/code&gt;
already allocated an internal buffer
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/pfr/"&gt;PFR&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added missing &lt;code&gt;&lt;span class="preprocessor"&gt;#include&lt;/span&gt;
&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;memory&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt; for inclusion of &lt;code&gt;&lt;span class="identifier"&gt;std&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;addressof&lt;/span&gt;&lt;/code&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed -Wzero-length-array warning when dealing with empty aggregates
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fixed compilation on msvc compilers &amp;lt;= 1920 (thanks to Alexey
Romanov aka @alexey-romanov)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added basic CMakeLists.txt support (thanks to @pdimov aka Peter Dimov)
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Multiple improvements for docs, including links to https://github.com/apolukhin/pfr_non_boost
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added misc/strip_boost_namespace.sh script to remove &lt;code&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;/code&gt;
and &lt;code&gt;&lt;span class="identifier"&gt;BOOST_&lt;/span&gt;&lt;/code&gt; prefixes
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/predef/"&gt;Predef&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Version 1.13.1
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fix spelling of "epoch".
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Add missing parenthesis in sparc.h (from tkoecker).
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Update documentation to use Rouge code styling and Amber general
style.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/regex/"&gt;Regex&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;strong&gt;Breaking Change:&lt;/strong&gt; Change \B to be
the opposite of \b as per Perl behaviour.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Change w32_regex_traits.hpp so that windows.h is no longer included.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Fxed fuzzing related issues &lt;a href="https://github.com/boostorg/regex/issues/151"&gt;#151&lt;/a&gt;,
&lt;a href="https://github.com/boostorg/regex/issues/152"&gt;#152&lt;/a&gt;,
&lt;a href="https://github.com/boostorg/regex/issues/153"&gt;#153&lt;/a&gt;,
&lt;a href="https://github.com/boostorg/regex/issues/156"&gt;#156&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/system/"&gt;System&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added support for source locations to &lt;code&gt;&lt;span class="identifier"&gt;error_code&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;error_code&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;to_string&lt;/span&gt;&lt;/code&gt;,
&lt;code&gt;&lt;span class="identifier"&gt;error_condition&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;to_string&lt;/span&gt;&lt;/code&gt;, &lt;code&gt;&lt;span class="identifier"&gt;error_code&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;what&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;code&gt;&lt;span class="identifier"&gt;system_error&lt;/span&gt;&lt;span class="special"&gt;::&lt;/span&gt;&lt;span class="identifier"&gt;what&lt;/span&gt;&lt;span class="special"&gt;()&lt;/span&gt;&lt;/code&gt;
now contains the source location, if present.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;result&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;T&lt;/span&gt;&lt;span class="special"&gt;,&lt;/span&gt; &lt;span class="identifier"&gt;E&lt;/span&gt; &lt;span class="special"&gt;=&lt;/span&gt; &lt;span class="identifier"&gt;error_code&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;,
a class holding either a value or an error, defined in &lt;code&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;system&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;result&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/utility/"&gt;Utility&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Library documentation converted to QuickBook (thanks to Alan de Freitas,
&lt;a href="https://github.com/boostorg/utility/pull/79"&gt;PR#79&lt;/a&gt;).
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/libs/variant2/"&gt;Variant2&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;boost&lt;/span&gt;&lt;span class="special"&gt;/&lt;/span&gt;&lt;span class="identifier"&gt;variant2&lt;/span&gt;&lt;span class="special"&gt;.&lt;/span&gt;&lt;span class="identifier"&gt;hpp&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;unsafe_get&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&lt;/span&gt;&lt;span class="identifier"&gt;I&lt;/span&gt;&lt;span class="special"&gt;&amp;gt;&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="identifier"&gt;visit_by_index&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Added &lt;code&gt;&lt;span class="keyword"&gt;operator&lt;/span&gt;&lt;span class="special"&gt;&amp;lt;&amp;lt;&lt;/span&gt;&lt;/code&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_78_0.updated_tools"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Updated Tools&lt;/span&gt;&lt;/h3&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
&lt;span class="library"&gt;&lt;a href="https://www.boost.org/tools/build/"&gt;Build&lt;/a&gt;:&lt;/span&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Includes release of &lt;a href="https://www.boost.org/tools/build/doc/html/#_version_4_7_2"&gt;B2
version 4.7.2&lt;/a&gt;.
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_78_0.compilers_tested"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Compilers Tested&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
Boost's primary test compilers are:
&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Linux:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Clang: 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 12.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++11: 3.4, 11.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++14: 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 5.0, 12.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++17: 6.0.1, 7.0.0, 8.0.0, 9.0.0, 10.0.0, 11.0.0, 12.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Clang, C++20: 11.0.0, 12.0.0, 13.0.0
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC: 4.6.3, 11
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++11: 4.7.3, 4.8.5, 11
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++14: 5.4.0, 6.4.0, 7.3.0, 8.0.1, 9.1.0, 11
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++17: 7.3.0, 8.0.1, 9.1.0, 11
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
GCC, C++20: 8.0.1, 9.1.0, 10, 11
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
OS X:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++11: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++14: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++17: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Apple Clang, C++20: 11.0.3
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;div&gt;
Windows:
&lt;ul&gt;
&lt;li&gt;
&lt;div&gt;
Visual C++: 10.0, 11.0, 12.0, 14.0, 14.1, 14.2
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/div&gt;
&lt;div id="version_1_78_0.acknowledgements"&gt;
&lt;h3&gt;&lt;span class="link"&gt;Acknowledgements&lt;/span&gt;&lt;/h3&gt;
&lt;p&gt;
Marshall Clow, Michael Caisse and Glen Fernandes managed this release.
&lt;/p&gt;
&lt;/div&gt;
</description></item>
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</rss>