Horizon Posted April 14, 2023 Share Posted April 14, 2023 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 Build: Includes release of B2 version 4.9.4. 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. View the full article Quote Link to comment Share on other sites More sharing options...
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