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 2018. The current version is 1.92.0.

static_string::rend (1 of 2 overloads)

Returns a reverse iterator to the end.

reverse_iterator
rend();