C++17 std::launder and aliasing

[Ville Voutilainen]

On 24 October 2016 at 12:55, Richard Biener <rguenther@suse.de> wrote:
>> It's OK for std::launder to pessimize optimizations. That's what it's
>> for, after all :-)
>
> Then hopefully there's no need to use it in libstdc++ itself ;)


Not much beyond std::variant and std::optional. :)