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 1.89.0.
boost::unwrap_reference — Find the type in a reference_wrapper.
// In header: <boost/ref.hpp> template<typename T> class unwrap_reference { public: // types typedef unspecified type; };