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 2022. The current version is 1.91.0.

unit_test::selector::operator()

template<
    class = void>
bool
operator()(
    suite_info const& s);