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Variants

std::barrier<CompletionFunction>:: ~barrier

From cppreference.net
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std::barrier
~barrier ( ) ;
(since C++20)

Destroys the barrier .

Notes

It is only safe to invoke the destructor if all threads have been notified. The programmer must ensure that no threads attempt to wait on * this once the destructor has been started. The destructor does not notify and release any waiting threads.