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

On 04/04/2015 05:08 PM, Matt Calabrese wrote:

On Sat, Apr 4, 2015 at 3:06 PM, Matt Calabrese wrote:

...

You need to use a recursive union if you are to get some constexpr support.

Well, let me rephrase, you can expand it out by preprocessor to a certain limit and get that too, but you can't just use aligned storage. At some point you need to hit a recursive case.

Could you please elaborate on why recursion cannot be avoided?