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
void as no objects
can be allocated through a proto-allocator.
typedef void value_type;
Header: boost/asio/execution_context.hpp
Convenience header: boost/asio/execution.hpp