[Bug c++/91415] Invalid warning for C++17 sequencing of shift operator E1<<E2.

[nico at josuttis dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91415

--- Comment #13 from Nicolai Josuttis <nico at josuttis dot de> ---
Oh, sorry, your are right, the example indeed works.
BUT: I used in fact a slightly different example
(sorry, didn't expect that there is a difference):

int main() {
  int i = 0;
  int j = i++ << i++;       // OK, NO WARNING
  std::cout << i++ << i++;  // still WARNING
}

see https://wandbox.org/permlink/ioZnOv3oAp5F0BsQ

According to my understanding the warning should especially
also not come when we pass i++ twice to std::cout
(to sequence output was a key goal of this fix in C++17).

But may be I am missing something.