[PATCH] D17444: PR26672: [MSVC] Clang does not recognize "static_assert" keyword in C mode

David Majnemer via cfe-commits cfe-commits at lists.llvm.org
Thu Mar 3 09:06:04 PST 2016

On Thu, Mar 3, 2016 at 7:52 AM, Aaron Ballman <aaron at aaronballman.com>

> On Thu, Mar 3, 2016 at 10:43 AM, Andrey Bokhanko
> <andreybokhanko at gmail.com> wrote:
> > Now I'm completely confused... :-)
> >
> > Can we rely that this MS engineer has enough authority to declare this
> > to be a bug?
> He's on the compiler team, so yes.
> > And more importantly -- is MS willing to fix the [supposed] bug in
> > future MSVC compilers? I frankly don't think so...
> We can only guess what Microsoft is going to do and when. However, we
> do not aim to be bug for bug compatible with MSVC unless there's very
> good reason to do so, and I've yet to see any justification to warrant
> that for this bug. Further, there's additional burden. If Microsoft
> fixes this bug, are we going to then update our code to only support
> it in a certain range of -fms-compatibility-version values? Or are we
> going to have a compatibility hack that Microsoft doesn't have? etc.

Here is my thinking:
If there is code out there in a wild that depends on this, then we should
take this patch.
Once Microsoft releases a compiler which supports the conforming behavior,
we should limit it's scope to a specific range of versions.
We've done this in the past for things like _Atomic.

> > Either way, it's up to Reid to decide what to do. Reid?
> It is not solely up to Reid to decide what to do. It's up to us as a
> community as to what we want to support and maintain long-term and
> that requires some amount of consensus. Also, Reid is not the only
> Windows maintainer. ;-)
> ~Aaron
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