[cfe-dev] Clang support for C++20 P0929 (Checking for abstract class types)

[Tom Honermann via cfe-dev]

Clang (trunk) does not appear to implement P0929<http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p0929r2.html>, nor does the C++20 implementation status page<https://clang.llvm.org/cxx_status.html#cxx20> acknowledge it.  Known issue?

https://godbolt.org/z/cMcddo

Tom.
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