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gistfile1.txt

bool await_ready();
...  await_suspend(handle);
V    await_resume();


Channel<V, 1> ch;
ch.~Channel() -- while (...) {}

V value = co_await ch.Recv();



co_await ch.Send(v);



1) void 
2) bool -- true, false
3) corountine_handle -- symmetric transfer

handle.resume/destroy()


Kek kek = co_await m.lock();

auto awaiter = m.lock();
if (!awaiter.await_ready()) {
   builtin_suspend(awaiter) -------> awaiter.await_suspend(previos_self) 
}
awaiter.await_resume();


Mutex m
auto guard = co_await m.lock();