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
Obtain type information for the target executor object.
const std::type_info & target_type() const;
If *this
has a target type of type T,
typeid(T); otherwise,
typeid(void).