P3411 R2 `any_view`

[wg21bot]

P3411R0 any_view (Hui Xie, S. Levent Yilmaz, Louis Dionne)

[dhollman]

SG9 in Wrocław

SG9 saw this paper at the 2024-11 Wrocław meeting. The notes on that discussion are available here. The room discussed the following suggestion additions to the paper that we believed would increase consensus for the paper:

• any_view convertibility design (or exploration of why it's QoI)
• Exploration of SBO size as a template parameter
• Explore the single expansion point design (e.g., mdspan or standard containers with allocators rather than putting RValRef etc. into the template parameters list directly)
• Consider allowing cv qualifiers on the value type parameter or defaulting to const to make specifyin

---

We took the following vote:

Given that we will not get to do other things if we pursue this, we believe that type erasure of views is an important use case that we should spend committee time on.

SF	F	N	A	SA
6	2	1	0	0

Attendance: 10
Author: SF

[wg21bot]

P3411R1 any_view (Hui Xie, S. Levent Yilmaz, Louis Dionne)

[cor3ntin]

Removing LEWG until SG9 is done with it