Re: [boost] [config] Changes to reflect Visual C++ "15" preview 5

Subject: Re: [boost] [config] Changes to reflect Visual C++ "15" preview 5
From: Beman Dawes (bdawes_at_[hidden])
Date: 2016-10-12 07:36:45

On Sat, Oct 8, 2016 at 4:31 AM, Boris Rasin <boris_at_[hidden]> wrote:

> On 2016-10-08 12:38 AM, Beman Dawes wrote:
>
>> BOOST_NO_CXX14_CONSTEXPR
>>
>> The "15" preview 5 release notes say "The most notable compiler changes
>> include complete support for generalized constexpr"  I know from
>> conversations with msft folks that they put a lot of effort into constexpr
>> fixes, and that they would like bug reports if anyone is finds constexpr
>> bugs with "15" preview 5. I'll submit a P/R.
>>
>
> Microsoft "Connect" is full of constexpr bug reports which are not getting
> fixed.
> Here are a few examples:
>
> https://connect.microsoft.com/VisualStudio/feedback/details/
> 2321214/constexpr-taking-address-of-static-object-error-c213
> 1-expression-did-not-evaluate-to-a-constant
> https://connect.microsoft.com/VisualStudio/feedback/details/
> 2596275/c-constexpr-error-c2975
> https://connect.microsoft.com/VisualStudio/feedback/details/
> 2174854/constexpr-variables-always-have-internal-linkage
>
>
I asked the VC++ folks about those and Cody Miller, the dev who is working
constexpr issues, replied:

> I’ll prioritize fixes for the three issues called out below (I’m testing
a fix for one of them right now).

>Our goal is to be down to zero customer-reported issues in time for
release, but if you know of any

> issues that impact Boost and should be prioritized, please let me know.

Msft is now running the Boost regression tests as part of their release
criteria for constexpr, expression sfinae, and perhaps some other worrisome
areas. But if there are "Connect" issues that impact Boost, email me
privately and I'll put you in touch with Cody so he can give them priority.

--Beman