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 2019. The current version is 1.89.0.

time_traits< boost::posix_time::ptime >::add

time_traits< boost::posix_time::ptime >::add

Add a duration to a time.

static time_type add(
    const time_type & t,
    const duration_type & d);