Re: [boost] Another variant type (was: [peer review queue tardiness] [was Cleaning out the Boost review queue] Review Queue mem

Sorry for the delayed response! On Sat, Apr 4, 2015 at 5:55 PM, Eric Niebler wrote:

To put an object into aligned storage requires placement new, which is not constexpr. Using a recursive union avoids the need for placement new.

Precisely this. Unfortunately, even with the recursive variant, you are still very limited in what you can do with a constexpr variant. -- -Matt Calabrese