[llvm-bugs] [Bug 39779] New: -Wunsequenced warning on OR operator

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=39779

            Bug ID: 39779
           Summary: -Wunsequenced warning on OR operator
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: tiagomacarios at gmail.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

As per http://eel.is/c++draft/expr.log.or#2 this should be well defined, but
clang issues a warning.

https://godbolt.org/z/pcut3J

void foo(int idx)
{
    ((idx++, false) || (idx++, false));
}

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