Version 1.82.0
April 14th, 2023 03:08 GMT
Documentation
Known Issues
These are patches from library authors which were found too late to be fixed
in the release.
-
Filesystem
-
Compilation on OpenBSD may fail because of broken support for
-Wl,--no-undefined
compiler flag for shared libraries on this platform, see #283.
Patch.
-
On Windows, creating directory iterators over directories in SMBv1
shares may fail with
ERROR_INVALID_LEVEL
error code, see #284. Patch.
Notice
of Dropping C++03 Support
The following libraries will be dropping C++03 support in release 1.84, two
releases from now:
-
Align
-
Any
-
Asio
-
Atomic
-
Bind
-
Chrono
-
ContainerHash
-
Conversion
-
DLL
-
Endian
-
Filesystem
-
Function
-
Functional
-
Io
-
LexicalCast
-
Log
-
Random
-
Ratio
-
SmartPtr
-
System
-
Stacktrace
-
Thread
-
Timer
-
TypeIndex
-
Typeof
-
Unordered
-
Variant
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.
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.
However, a general rule is that if a compiler does not recognize a C++11 keyword
or syntax at all (e.g. use of noexcept,
use of constexpr, or defining
a =deleted
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 <atomic> or <chrono>
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.
This rules out, for instance, Microsoft Visual C++ before 14.0, or GCC before
4.8.
New Libraries
- Mysql:
- a C++11 client for the MySQL
database server, based on Boost.Asio, from Ruben Perez.
Updated Libraries
-
Any:
-
Now uses
core/enable_if.hpp header instead of the deprecated
utility/enable_if.hpp. Thanks to Michael Ford for
the PR PR#25.
-
Asio:
-
Added the ability to customise the execution of a completion handler
when an operation completes immediately.
-
Added user-defined literals for buffer types.
-
Added a new protocol type
local::seq_packet_protocol
to represent AF_UNIX
with SOCK_SEQPACKET.
-
Exposed
sigaction() flags via an optional argument
to signal_set::add.
-
Change
allocator_binder,
executor_binder,
and cancellation_slot_binder
to support detection of unspecialised associators.
-
Fixed ambiguity in
associated_cancellation_slot<reference_wrapper>::get().
-
Fixed
awaitable<>
handling for completion signatures containing std::exception_ptr.
-
Fixed
experimental::channel<> try_send
failure after a cancel.
-
Fixed
thread_pool::join() deadlock when the pool has no internal
threads.
-
Fixed pipe
release() when using io_uring.
-
Fixed data initialisation and cleanup issues in the io_uring
backend.
-
Fixed a dangling reference issue in the execution context overload
of
get_associated_executor().
-
Ensured buffered messages can still be received when an
experimental::channel<>
is closed.
-
Fixed the
any_completion_handler
assignment operator.
-
Constrained the constructor of
any_completion_handler
to prevent accidental copying
-
Changed to use
uint64_t
for OpenSSL options, to match OpenSSL 3.
-
Fixed
deferred interoperability
with multiple completion signatures.
-
Fixed channels to add partial support for C++11 and C++14.
-
Added missing handler tracking source location support to
co_composed and 'awaitable<>'
coroutines, when awaiting packaged asynchronous operations.
-
Fixed some 'potential null dereference' and shadow variable warnings.
-
Fixed a
asio::buffer overload selection when
used with const_buffers_1
and mutable_buffers_1.
-
Disabled the runtime check for current Windows version unless targeting
older Windows.
-
Fixed compatibility between buffered stream wrappers and move-constructible
streams, such as
ssl::stream<>.
-
Fixed
basic_socket_acceptor::async_accept
compatibility with lambdas that have a deduced return type.
-
Fixed
as_tuple compatibility
with legacy completion tokens.
-
Fixed
redirect_error
compatibility with new completion tokens.
-
Fixed a potential, Windows-specific program termination due to exceptions
that should have been allowed to escape from a destructor.
-
Prevented inadvertent
co_await
of boolean expressions.
-
Fixed result handling and support for custom allocators in
experimental::use_coro.
-
Fixed variadic template emulation for
is_async_operation
and completion_signature_of.
-
Fixed incorrect reuse of a moved-from result in
experimental::promise.
-
Fixed
experimental::coro
use with custom allocators.
-
Fixed
seek_cur behaviour
with stream-oriented files on Windows.
-
Various additions and modifications to the documentation.
-
Consult the Revision
History for further details.
-
Atomic:
-
When compiled for x86 targets supporting AVX, vector instructions
are now used for 128-bit atomic loads and stores.
-
For 32-bit x86 targets, 64-bit atomic loads and stores with
memory_order_seq_cst semantics
will now issue a memory ordering instruction.
-
Removed
atomic<T>::storage()
accessors and atomic<T>::storage_type
types that were deprecated in Boost.Atomic 1.73. Users are recommended
to use atomic<T>::value()
and atomic<T>::value_type instead.
-
Beast:
-
Add
error_codes use
source_location
-
tcp_stream uses the correct executor of the timer.
-
error_categories use numeric ids
-
file_body supports
seek
-
ContainerHash:
-
Added an overload of
hash_value
for std::nullptr_t.
-
Added
is_tuple_like
and an overload of hash_value
for tuple-like types.
-
Changed string hashing to use
mulxp1_hash. This improves
both quality and speed.
-
Core:
-
Added
boost/core/snprintf.hpp header with portable definitions
of snprintf, vsnprintf and their wchar_t counterparts.
-
Deprecated
boost/core/is_same.hpp
and boost::core::is_same. The header will be removed
in a future release. Users are advised to use Boost.TypeTraits or
C++ standard library type traits instead.
-
Marked
boost::ref member functions and associated
methods with noexcept.
-
Marked
boost::swap function with noexcept, depending on whether the
type supports a non-throwing swap operation.
-
Added
boost::core::launder, a portable implementation
of std::launder.
-
Added
BOOST_CORE_ALIGNOF,
a portable implementation of alignof.
-
Added
boost::core::max_align_t, a portable equivalent
of std::max_align_t, and boost::core::max_align, the alignment of max_align_t.
-
Added
boost::core::memory_resource, a portable equivalent
of std::pmr::memory_resource from C++17.
-
Added
boost/core/serialization.hpp, 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.
-
Added
boost::data, an implementation of std::data.
-
Added
boost::size, an implementation of std::size.
-
Updated
boost::span to use boost::data
which adds support for range construction from an std::initializer_list.
-
Added
boost::identity, an implementation of
std::identity. This facility has been
moved from Boost.Functional.
-
DLL:
-
Avoid implicit cast from size_t to uint32_t, thanks to Travers Biddle
for the PR PR#57.
-
Filesystem:
-
Fixed compilation errors that could have been caused by
path conversion constructors being
too permissive on the accepted arguments. (#273)
-
v4:
path::remove_filename
now presesrves the trailing directory separator. (#271)
-
Added
path::remove_filename_and_trailing_separators,
which removes the filename and directory separators preceding it
from the path. This behavior is similar to path::remove_filename
in Filesystem v3, but is also usable
in v4.
-
Added
path::replace_filename, which replaces
filename in a path.
-
Updated implementation of the library version selection to avoid
ODR violations. (#279)
-
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.
(#282)
-
Geometry:
-
Major improvements
-
PR#1045 Support geographic buffer for (multi)linestrings
and (multi)polygons
-
Improvements
-
PR#1114 Comparable distance: Add support for dynamic
geometries
-
PR#1046 Support covered_by() for box, geometry combinations
-
Solved issues
-
#705 WKT: allow tabs and new lines
-
#1109, #1108 Fixes for union
-
Various fixes in examples
-
Breaking changes
-
The WKT output presentation of an empty polygon is now POLYGON()
to make it consistent with other geometries
-
Histogram:
-
Replace
detail::span and detail::make_span
with implementations in boost::core
-
Documentation improvements
-
Protect usage of
std::min
and std::max in some cases, contributed
by Han Jiang (min,max macros are illegially set by popular Windows
headers so we need to work around)
-
Added test to catch usage of unprotected min,max tokens in the library
in the future
-
Fixes to support latest clang-14 and deduction guides in gcc-11+
-
JSON:
-
set_at_pointer.
-
boost::hash support.
-
Caller-provided serializer storage.
-
value_to supports
missing elements for std::optional.
-
Fix parser suspend inside an escape character.
-
Make sentinel() return a unique pointer.
-
Locale:
-
get_system_locale
and dependents will now correctly favor LC_ALL
over LC_CTYPE as
defined by POSIX PR#144
-
utf8_codecvt::out returns partial
for trailing (UTF) surrogates
-
Add
boost::locale::util::locale_data to parse a locale
-
boost::locale::info::encoding()
result is now in uppercase as documented, e.g. "UTF-8"
instead of "utf-8"
-
Support M49 country codes such as
en_001
or en_150 PR#148
-
Treat
en_US_POSIX
as an alias for the C
locale PR#148
-
Improve error for missing segmentation support (i.e. without ICU)
PR#149
-
Fix compiler warnings
-
Math:
-
Deprecated C++11 support: We now
require C++14 as a minimum standard. Our minimum tested compiler
versions are now Clang-5, GCC-5 or MSVC-14.1.
-
Added Estrin's method for polynomial evaluation.
-
Fix various issues in non-central distributions to allow for larger
non-centralities see 939.
-
Added CMake install target.
-
Fix special_functions.hpp to disable anything which can't be used
in an exception-free environment.
-
Get condition number calculation working in C++14.
-
Fix
constexpr table
driven functions to avoid massive slowdown when the code is not actually
constexpr, see 923.
-
Improve tanh_sinh boundary handling, see 894.
-
Add Linux arm64, s390x and Apple M1 testing, fix up test cases to
handle 128-bit long doubles.
-
Improve
constexpr math
functions to better handle infinities and NaN's.
-
Make the integrators const-correct.
-
Fix tanh_sinh integrator in case the function underflows, see 898.
-
Don't use
std::cbrt as some platforms still don't
support it.
-
Stop non-central T from raising spurious FE_INVALID exceptions, see
892.
-
Fix binomial distribution edge case.
-
Improve ibeta handling of very small arguments, see 884.
-
Improve ibeta handling of infinities and NaN's, see 878.
-
Improve error handling in powm1, see 781.
-
Improve root-finder bracketing to bracket faster when the exponent
is super-large or small.
-
Fix root finding edge cases, see 873.
-
Lots of miscellaneous warning fixes.
-
Add assertions when using features which require C++17 for better
error messages when invoking the compiler in a lower std version.
-
Multi-index Containers:
-
Serialization now uses
unsigned
long instead of collection_size_type, and
multi_index_container
serialization class
version has been bumped from 2 to 3 to reflect this change.
Reading old archives may fail for custom archive types giving special
treatment to collection_size_type
values: if this is the case, globally define the macro BOOST_MULTI_INDEX_ENABLE_SERIALIZATION_COMPATIBILITY_V2
to ensure backwards compatibility in reading operations.
-
Maintenance work.
-
Multiprecision:
-
Deprecated C++11 support: We now
require C++14 as a minimum standard. Our minimum tested compiler
versions are now Clang-5, GCC-5 or MSVC-14.1.
-
Added a new forward declaration header.
-
Update Eigen interoperability so we no longer rely on Eigen's details,
see 479.
-
Add Cmake install target.
-
Fix cpp_dec_float construction from string in standalone case for
better error handling, see 499.
-
Remove redundent definitions when in C++17 mode, see 530.
-
Fix the error handling in standalone itrunc and ltrunc.
-
Fix potentially uninitialized storage when parsing octal strings.
-
Add arm64 and s390x CI testing.
-
Add some missing expression template unpacking code for
powm, see 506.
-
Nowide:
-
Add
convert_string
overload accepting a (std::)string instance
-
Add
quoted to output
(quoted UTF-8) paths (std::filesystem
or boost::filesystem) to streams PR#170
-
PFR:
-
Implemented the
boost::pfr::is_implicitly_reflectable
and the machinery for specializing aggregates as reflectable or not,
thanks to Denis Mikhailov for the PR PR#111.
-
Implemented
boost::pfr::get
by type of an element in the aggregate.
-
Implemented the
BOOST_PFR_ENABLED
macro to detect library support for reflection, thanks to Denis Mikhailov
for the PR PR#86.
-
Fixed missing terminating character, thanks to Denis Mikhailov for
the PR PR#114.
-
Fixed the
boost/pfr/config.hpp compilation on older compilers,
thanks to Denis Mikhailov for the PR PR#118.
-
Workaround for broken C++17 stuctured binding in old compilers, thanks
to Denis Mikhailov for the PR PR#119.
-
Avoid -Wzero-as-null-pointer-constant warnings, thanks to Markus
F.X.J. Oberhumer for the PR PR#117.
-
Fixed multiple typos, thanks to Denis Mikhailov for the fixes.
-
Added missing
#pragma
once, thanks to caozhanhao for the PR
PR#121.
-
Multiple fixes and improvements for the docs.
-
Process:
-
Added management for extern processes to V2 (still experimental)
-
Deprecated
wait_for
& wait_until
in V1 - they will be removed in the future!
-
Stacktrace:
-
Fixed typos in docs and comments, thanks to Chocobo1 for the PR PR#132.
-
Fixed multithreading flag detection for
backtrace_create_state
if BOOST_STACKTRACE_BACKTRACE_FORCE_STATIC
is defined.
-
StaticString:
-
Boost.Core
string_view
and std::string_view interoperability
-
Test:
-
Fixed several unused variable warnings
-
Fixed sprintf deprecation warnings
-
Fixed undefined behavior in
basic_cstring::rfind
-
Added CI through Github Actions
-
Unordered:
-
Major update.
-
Added node-based, open-addressing containers
boost::unordered_node_map
and boost::unordered_node_set.
-
Extended heterogeneous lookup to more member functions as specified
in P2363.
-
Replaced the previous post-mixing process for open-addressing containers
with a new algorithm based on extended multiplication by a constant.
-
Fixed bug in internal
emplace
impl where stack-local types were not properly constructed using
the allocator of the container which breaks uses-allocator construction.
-
URL:
-
Add
url::format with automatic percent-encoding
-
URL router example
-
set_params convenience
function
-
Support implicit conversions to
string_view
-
Parsing constructors are implicit
-
string_token::arg has virtual destructor and
slice protection
-
Support
BOOST_URL_DISABLE_THREADS
-
Improvements and Bug fixes:
-
WIN32_LEAN_AND_MEAN macro redefinition warning
-
Comparison differentiates absent and empty components
-
Detect
hier_part_rule
with empty-port-like segments
-
Segments comparison as if normalized works above root
-
hier-part path-rootless considers invalid segments
-
port as number is set to 0 when it overflows
-
ipv4 to string overflow detection algorithm
-
Variant:
-
Now uses core/addressof instead of the deprecated utility/addressof.
Thanks to Michael Ford for the PR PR#105.
Updated Tools
Compilers Tested
Boost's primary test compilers are:
-
Linux:
-
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
-
Clang, C++11: 3.4, 11.0.0, 13.0.0, 14.0.0, 15.0.0
-
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
-
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
-
Clang, C++20: 11.0.0, 12.0.0, 13.0.0, 14.0.0, 15.0.0
-
GCC, C++03: 4.6.3, 11, 12
-
GCC, C++11: 4.7.3, 4.8.5, 11, 12
-
GCC, C++14: 5.4.0, 6.4.0, 7.3.0, 8.0.1, 9.1.0, 11, 12
-
GCC, C++17: 7.3.0, 8.0.1, 9.1.0, 11, 12
-
GCC, C++20: 8.0.1, 9.1.0, 10, 11, 12
-
OS X:
-
Apple Clang, C++03: 11.0.3
-
Apple Clang, C++11: 11.0.3
-
Apple Clang, C++14: 11.0.3
-
Apple Clang, C++17: 11.0.3
-
Apple Clang, C++20: 11.0.3
-
Windows:
-
Visual C++: 10.0, 11.0, 12.0, 14.0, 14.1, 14.2, 14.3
Acknowledgements
Marshall Clow and Glen Fernandes managed this release.
