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

Subject: Re: [boost] Another variant type (was: [peer review queue tardiness] [was Cleaning out the Boost review queue] Review Queue mem
From: Larry Evans (cppljevans_at_[hidden])
Date: 2015-04-04 18:33:49

On 04/04/2015 05:08 PM, Matt Calabrese wrote:
> On Sat, Apr 4, 2015 at 3:06 PM, Matt Calabrese <rivorus_at_[hidden]> 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?