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

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Handlers

Handlers

A handler must satisfy the requirements of Destructible (C++Std [destructible]) and MoveConstructible (C++Std [moveconstructible]).

A handler may expose additional information and behaviour via associators, such as associated_allocator, associated_executor, and associated_cancellation_slot.