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 the documentation for a snapshot of the master branch, built from commit 064f557086.

A copy of, or reference to, a real handler object.

conditional_t< is_same< CompletionToken, completion_handler_type >::value, completion_handler_type &, completion_handler_type > completion_handler;