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 2020. The current version is 1.90.0.

Global top

Global top

boost::xpressive::top — top is a lazy PolymorphicFunctionObject for accessing the top element from a stack in an xpressive semantic action.

Synopsis

// In header: <boost/xpressive/regex_actions.hpp>

function< op::top >::type const top;