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 2024. The current version is 1.89.0.
This was the first official release of Phoenix as first class Boost citizen. As a consequence of the review of Phoenix V2 the internals got completely rewritten. Therefore the internal extension mechanism is different.