Add Brno 2026 minutes/polls/action items

papers/P2728.md

@@ -1,7 +1,7 @@
 ---
 title: "Unicode in the Library, Part 1: UTF Transcoding"
-document: P2728R14
-date: 2026-06-10
+document: D2728R15
+date: 2026-07-11
 audience:
   - SG-16 Unicode
   - SG-9 Ranges
@@ -1586,6 +1586,10 @@ An experimental implementation of `.base_code_units()` is available on the
 
 # Changelog
 
+## Changes since R14
+
+- Revert SIMD support
+
 ## Changes since R13
 
 - Fix typo in Table 3-9 of error handling diagram pointed out during SG16 review (`ED A0`
@@ -1782,6 +1786,76 @@ An experimental implementation of `.base_code_units()` is available on the
 
 # Relevant Polls/Minutes
 
+## SG9 review of P2728R14 on 2026-06-10 during Brno 2026
+
+- [Minutes](https://wiki.isocpp.org/NotesSG9P2728R12)
+
+**Poll: We want base() for forward ranges (at the expense of either iterating (but not reading) over a code point twice or caching an additional iterator (QoI)).**
+
+ SF| F | N | A | SA
+---|---|---|---|---
+ 2 | 4 | 0 | 0 | 0
+
+Attendance: 7
+Author: F
+Unanimous consent.
+
+**Poll: We want base_code_units() for input ranges (requires a cache and has potential lifetime issues).**
+
+No objection to unanimous dissent.
+Attendance: 7
+
+**Poll: We want base_code_units() for forward ranges (pure syntactic sugar for `subrange(it.base(), next(it).base())`)**
+
+ SF| F | N | A | SA
+---|---|---|---|---
+  1| 4 | 0 | 1 | 0
+
+Attendance: 7
+Author: F
+Strong consensus.
+
+A: I think it's probably useful, but I'm not certain, so let's wait.
+
+**Poll: We want to change `to_utf_error_kind` in some way to allow more options in the future.**
+
+No objection to unanimous consent.
+Attendance: 7
+
+**Poll: We want the transcoding view to be borrowed when the underlying view is borrowed (at the cost of storing three underlying iterators in each transcoding iterator instead of one and a pointer).**
+
+ SF| F | N | A | SA
+---|---|---|---|---
+  1| 5 | 0 | 1 | 0
+
+Attendance: 8
+Author: F
+Strong consenus.
+
+A: I'm worried about the size and don't see as much value for borrowed-ness here.
+
+**Poll: We want to leave implementations the freedom to eagerly buffer more code units to allow a SIMD transcoding technique.**
+
+ SF| F | N | A | SA
+---|---|---|---|---
+  0| 0 | 3 | 3 | 1
+
+Attendance: 8
+Author: N
+Strong consensus against.
+
+ACTION ITEM: UTF-32 to UTF-32 transcoding should be random access if the underlying view is random access.
+
+**Poll: Update P2728R14 "Unicode in the Library, Part 1: UTF Transcoding" as determined above and forward to LEWG.**
+
+ SF| F | N | A | SA
+---|---|---|---|---
+  5| 3 | 0 | 0 | 0
+
+Attendance: 8
+Author: SF
+Unanimous consent.
+
 ## SG16 review of P2728R13 on 2026-05-27 (Telecon)
 
 - [Minutes](https://wiki.isocpp.org/2026_Telecons:SG16Teleconference2026-05-27)