Asio: Major Executor & Reactor Overhaul
New inline executor model, improved cancellation, expanded epoll configuration, and numerous correctness + performance fixes.
What's new in 1.90.0
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Container: Complete deque Rebuild
A modern, faster, drastically smaller deque implementation that simplifies future optimizations and resolves multiple long-standing issues.
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Redis: Major Redesign of Cancellation & Connection Behavior
True per-operation cancellation, deprecated old mechanisms, smarter health checking, and guaranteed Valkey compatibility.
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Math: Brand-New Reverse-Mode Automatic Differentiation Library
Adds full AD capabilities to Boost.Math, enabling modern ML/scientific workflows directly within Boost.
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Geometry: New is_valid for Polyhedral Surfaces + Performance Fixes
A major algorithm addition, improved conversion support, and fixes to reduce compile times and avoid stack overflows.
Release notes version 1.90.0
Dependencies
There was 1 dependency added (in 1 library) and 16 dependencies removed (in 10 libraries) this release.
New Libraries
OpenMethod:
- Open-(multi-)methods in C++17 and above, from Jean-Louis Leroy.
Updated Libraries
Asio
- Added the execution::inline_exception_handling property to describe what exception handling guarantees are made when execution occurs inline.
- Added inline_executor, which always executes the submitted function inline.
- Changed the default candidate executor for associated_executor from system_executor to inline_executor.
- Added the inline_or_executor<> adapter and inline_or() helper, which will execute inline if possible and otherwise delegate to another executor.
- Added overloads of dispatch, post and defer that take a function object to be run on the target executor, and deliver the result to the completion handler.
- Added the redirect_disposition completion token adapter, as a generic counterpart for redirect_error.
- Annotated deprecated items with the [[deprecated]] attribute.
- Added a new configuration parameter "reactor" / "reset_edge_on_partial_read", which determines whether a partial read consumes the edge when using epoll.
- Added the missing preprocessor check for BOOST_ASIO_DISABLE_TIMERFD.
- Implemented a compile-time feature detection mechanism for io_uring.
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