Re: [boost] Variant2 review

Subject: Re: [boost] Variant2 review
From: Gavin Lambert (boost_at_[hidden])
Date: 2019-04-08 02:07:32

On 8/04/2019 13:53, Peter Dimov wrote:
> Gavin Lambert wrote:
>> Especially when something as simple as accidentally omitting 
>> "noexcept" can cause a significant behavioural and storage size 
>> change, it's great to be able to tell the compiler that this was 
>> unintended.
> 
> This is, by the way, already the case with std::vector<X>. It will 
> silently fall back to using the copy constructor if you forget noexcept 
> on the move constructor of X. See f.ex. https://godbolt.org/z/gv1fN5

Just because it's in the Standard doesn't mean that (I think) it's a 
good design choice. ;)