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 1.90.0.

value_ref::value_ref (3 of 19 overloads)

Constructor.

template<
    class T>
value_ref(
    T const& t);