P2281R1 Clarifying Range Adaptor Objects

[StephanTLavavej]

P2281R1 Clarifying Range Adaptor Objects

No feature-test macro is mentioned.

At the June 2021 virtual plenary meeting, this was accepted as a defect report for C++20, which means that this paper applies retroactively to the C++20 Standard.

[frederick-vs-ja]

Is this already implemented (via the report in LWG-3509)?

[CaseyCarter]

There's nothing to implement here; this proposal simply clarifies the requirements of the existing implementations and codifies them in the Standard. I'm calling this complete.

[CaseyCarter]

I'm mistaken, I wasn't looking closely enough. Our range adaptor closure objects for split_view (and soon lazy_split_view) capture the pattern argument like a viewable_range via views:all, whereas P2281 says we should capture by copy. This will need another small followup in or after merging #2042.