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 the documentation for a snapshot of the master branch, built from commit 68cc668162.

Global a4

boost::xpressive::a4

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

unspecified a4;