Compiler builtin for std::launder

Hi, lists Core Issue 1776: Replacement of class objects containing reference members (et al) (std::launder) as Complete in Clang/libc++ 6.0, but I didn't see a corresponding compiler builtin documented at .

I'm assuming that such a builtin was implemented - can it be documented (or can someone tell me what it's spelled) so I can request C1XX and EDG support for the same builtin?


It's spelt __builtin_launder. See