P2944 R3 Comparisons for reference_wrapper

[wg21bot]

P2944R0 Comparisons for reference_wrapper (Barry Revzin)

[ben-craig]

P2944R1: Comparisons for reference_wrapper

P2944R1: Comparisons for reference_wrapper

2023-08-22 Library Evolution Telecon Minutes

Champion: Barry Revzin

Chair: Ben Craig

Minute Taker: Inbal Levi

Does this paper have:

• Examples? Before / After tables
• Field experience?
  • Implementation experience? No
  • Usage experience?
  • Deployment experience? No
• Performance considerations? N/A
• Discussion of prior art?
• Changes Library Evolution previously requested? N/A
• Wording? Yes
• Breaking changes? TBD
• Feature test macro? Yes
• Freestanding? Yes
• Format and/or iostream support? N/A
• Hash support? N/A
• Allocator support? N/A

Summary

proposed simd op== doesn't return bool, so a reference_wrapper would have the wrong signature.

ambiguity concerns, may need op<=> that covers ref <=> underlying in addition to ref <=> ref.

could use implementation experience.

Maybe provide new feature test macros for mandate -> constraint changes, if you can figure out a reason someone would want to test for that.

Next Steps

Provide a new revision addressing the concerns.

[wg21bot]

P2944R1 Comparisons for reference_wrapper (Barry Revzin)