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 2013. The current version is 1.92.0.

Global value_tag

boost::accumulators::extract::value_tag

Synopsis

// In header: <boost/accumulators/framework/accumulators/value_accumulator.hpp>

 value_tag;