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
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
#include <boost/phoenix/core/nothing.hpp>
Finally, the expression::null<mpl::void_>::type
does nothing; (a "bum", if you will :-) ). There's a sole expression::null<mpl::void_>::type instance named "nothing".
This actor is actually useful in situations where we don't want to do anything.
(See for_ Statement
for example).