[Bug 268996] The C++20 feature std::ranges::views::split is missing

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268996

Mark Millard <marklmi26-fbsd@yahoo.com> changed:

           What    |Removed                     |Added
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                 CC|                            |marklmi26-fbsd@yahoo.com

--- Comment #1 from Mark Millard <marklmi26-fbsd@yahoo.com> ---
https://en.cppreference.com/w/cpp/compiler_support/20 has a
row for the "The One Ranges Proposal" that has a 15* listed.
The popup text for indicates that prior to clang16 it was
considered experimental and was disabled by default.
It does not list 16 explicitly, however.

https://releases.llvm.org/download.html does not even
list clang16 yet: not officially released yet.

https://libcxx.llvm.org/ReleaseNotes.html reports:
"The C++20 ranges library has been completed and is no
longer experimental. Some views have not been implemented
yet. Work on C++23 ranges has started."

https://libcxx.llvm.org/Status/Cxx20.html lists as "In
Progress": "Views should not be required to be default
constructible". It also indicates that status for
"P2210R2 LWG Superior String Splitting", which is about
split and such, see:

https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2210r2.html

( https://libcxx.llvm.org/Status/Cxx20.html is in some
ways more explicit than what cppreference.com lists. )

https://clang.llvm.org/cxx_status.html lists the compiler
as only partially supporting C++20 as well.

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