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

Determine whether the coroutine throws if trying to suspend when it has been cancelled.

bool throw_if_cancelled() const;
  » more...

Set whether the coroutine throws if trying to suspend when it has been cancelled.

void throw_if_cancelled(
    bool value) const;
  » more...