Re: [boost] BOOST_NO_CXX11_CONSTEXPR and msvc-14.0

Subject: Re: [boost] BOOST_NO_CXX11_CONSTEXPR and msvc-14.0
From: Glen Fernandes (glen.fernandes_at_[hidden])
Date: 2015-07-21 21:16:27

Stephan T. Lavavej wrote:
> Was this reported on Connect? I didn't see any bug reports filed against the STL.

I don't know if it was reported on Connect; it was reported to me,
along with a few other library bugs in VC14.

> I've filed DevDiv#1202506 "alignof reports inaccurate values" with the repro at the end of this mail.

To be fixed in VC15? :-)

> If you can demonstrate x86 PMD failure, or x86/x64 PMF failure, I'll add that to the bug report.

Replacing "struct Meow { };" with "struct Meow;" and on x86 I see:

    nullptr_t
    AlignmentOf<T>::value = 4
               alignof(T) = 1 <== FAIL

    PMD
    AlignmentOf<T>::value = 8
               alignof(T) = 4 <== FAIL

    PMF
    AlignmentOf<T>::value = 8
               alignof(T) = 4 <== FAIL

While on x64 with that same change I see:

    nullptr_t
    AlignmentOf<T>::value = 8
              alignof(T) = 1 <== FAIL

    PMD
    AlignmentOf<T>::value = 4
              alignof(T) = 8 <== FAIL

    PMF
    AlignmentOf<T>::value = 8
              alignof(T) = 8

Glen