Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
This is an older version of Boost and was released in 2021. The current version is 1.89.0.
New documentation
Internal transitions. Either as part of the transition table or using a state's internal transition table
increased dispatch and copy speed
new row types for the basic front-end
new eUML syntax, better attribute support, macros to ease developer's life. Even VC8 seems to like it better.
New policy for reduced compile-time at the cost of dispatch speed
Support for base events
possibility to choose the initial event