Описание тега boost-function
A Boost C++ library that provide a family of class templates that are function object wrappers, similar to generalized callbacks.
The Boost.Function library defines boost::function, a class template that is callable like a function, and wraps another callable type and forwards calls to it.
Boost.Function was proposed for standardisation and was included in the Technical Report on C++ Library Extensions ( tr1) as std::tr1::function and included in the C++ 2011 standard as std::function ( std-function).