https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51253
--- Comment #15 from Akim Demaille <akim.demaille at gmail dot com> --- (In reply to Jonathan Wakely from comment #13) > (In reply to Akim Demaille from comment #10) > > auto t = std::make_tuple(incr(), incr()); > > That's not an initializer-list, it's a function call, so the order of > evaluation is not specified and that example is not relevant AFAICT. Yes, you are right, I had also realized that afterwards. It would be nice though if the standard could ensure that perfect forwarding could preserve the guarantee on left-to-right "upward": convenience functions, that wrap constructors for instance, could still be used safely.
