Q1 2021 priority: C++20

[StephanTLavavej]

In the first quarter of 2021, our top priority is finishing C++20 for VS 2019 16.10. (See our C++20 Features project and Conformance milestone.) We continue to welcome PRs that fix bugs, improve performance/throughput, and so forth, but code reviews may be significantly delayed as we focus on C++20.

If you have questions about our plans for this quarter, feel free to ask them here.

[Hamondorf]

For this quarter are there any plans to allow class non-type template parameters for user-defined string literals? As well as any plans to add Intellisense for 'using enum' declarations?

[miscco]

This is the repo of the standard library. I feel your questions are more geared toward the compiler and should be asked at the developer community

[AdamBucior]

For this quarter are there any plans to allow class non-type template parameters for user-defined string literals? As well as any plans to add Intellisense for 'using enum' declarations?

According to C++ reference class NTTP for UDLs will be available in VS 2019 16.9

[StephanTLavavej]

Thanks @miscco and @AdamBucior. @Hamondorf, here's the link: Developer Community. You can report IntelliSense issues there.

While this repo is indeed for the C++ Standard Library only (and we try to stay on-topic, otherwise we won't get our library work done), I took a moment to do some compiler archaeology - for P0732R2, it appears that this was implemented by internal MSVC-PR-279799 on Oct 7, before the Preview 2 cutoff on Nov 6, so cppreference is accurate and it should be available right now (Preview 2 is the latest publicly available build).

[jovibor]

Good Day. I have one question. Why in the world the MS STL's progress depends on Clang? It can be clearly seen from the issues like #1364 and many more. Is it also true for gcc? Is Clang's libc++ also depends on MS compiler?

Could you please shed some light on this subject? May be even some blog post, explaining all these cross dependencies, could be very helpful.

[cbezault]

@jovibor We treat Clang as a first class citizen alongside the MSVC compiler. To that end we extensively test the version of clang shipped with VS with our implementation of the C++ standard library and sometimes need to consider the differing behaviors of the two compilers as well as the difference in available language features.

[fsb4000]

As well as any plans to add Intellisense for 'using enum' declarations? @Hamondorf, EDG implemented "Using Enum" (P1099R5) recently in version 6.3. When the Visual Studio receives that version, then Intellesence support will appear...

[Hamondorf]

@fsb4000 sounds good, thanks for the update