Method copy

system/lib/libcxx/src/future.cpp:101–106

}

void __assoc_sub_state::copy() {
  unique_lock<mutex> __lk(__mut_);
  __sub_wait(__lk);
  if (__exception_ != nullptr)
    rethrow_exception(__exception_);
}

void __assoc_sub_state::wait() {
  unique_lock<mutex> __lk(__mut_);