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Re: [SG10] First draft of SD-6 with changes from Oulu

From: Richard Smith <richard_at_[hidden]>
Date: Wed, 20 Jul 2016 11:22:14 -0700
On Tue, Jul 19, 2016 at 11:12 AM, Nelson, Clark <clark.nelson_at_[hidden]>

> I have incorporated all of the changes approved at the last meeting into
> the
> table for C++17. The draft can be found at:
> http://wiki.edg.com/pub/Wg21oulu/SG10/sd-6.html
> Very few of those proposals had their own macro recommendations, but I have
> taken them into account. And as yet I haven't done anything about filling
> in
> the rationale, even for the cases for which I made my own recommendation.
> So
> we definitely have work to do.

Some suggestions:

Forward progress guarantees: no macro (these papers really just add
Inline variables: __cpp_inline_variables
Guaranteed copy elision: no macro (portable code should avoid or cope with
Expression evaluation order: no macro (portable code should not rely on the
Constexpr if: either __cpp_constexpr_if (matching the paper name) or
__cpp_if_constexpr (matching the syntax)
Selection statement with init: no macro (portable code can perform a simple
rewrite to avoid the feature)
Structured bindings: __cpp_structured_bindings

All the variant changes from Oulu should be covered by
__has_include(<variant>); I don't think we have a need to track them
separately unless someone chooses to produce a <variant> header that
doesn't match the contents of any working draft.

> Up until now I have been updating SD-6 on isocpp.org basically around the
> holidays. But we might want to try to publish an update before the Issaquah
> meeting, to cover the C++17 CD.
> I'd like to schedule a telecon to make some progress on this. August 1 and
> August 15 look like plausible candidates. If anyone has any definite
> preference for one over the other, please let me know.
> --
> Clark Nelson Chair, PL22.16 (ANSI C++ standard committee)
> Intel Corporation Chair, SG10 (C++ SG for feature-testing)
> clark.nelson_at_[hidden] Chair, CPLEX (C SG for parallel language
> extensions)
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Received on 2016-07-20 20:22:16