On 04/20/2017 10:39 AM, Jonathan Wakely wrote: > > Or simply deprecate support for it in std::atomic. **If** the > extension for built-in types is useful then I can imagine it might be > useful to have it for std::atomic too, for a subset of the programs > relying on the original extension. But I'm unconvinced how useful > the original extension is. There are other ways to achieve it if > absolutely necessary, e.g. convert the void* to uintptr_t and perform > the arithmetic and use compare_exchange to store it back again.
This comes from a completely different angle, but, if P0146R1 (Regular void) [1] manages to follow through, then that makes GCC's extension for built-in types be standard, AFAICS. AFAIK, the author is still pushing for the proposal aiming at C++20 [2]. [1] - http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0146r1.html [2] - <https://channel9.msdn.com/Shows/CppCast/Episode-83-Regular-Void-with-Matt-Calabrese>, end of last Feb, at min 14 onward. ( Please don't shoot the messenger. :-) ) Thanks, Pedro Alves
