P3380 R1 Extending support for class types as non-type template parameters

[wg21bot]

P3380R0 Extending support for class types as non-type template parameters (Barry Revzin)

[jfbastien]

Seen in EWG on Friday:

Poll: P3380r1 Extending support for class types as non-type template parameters, send the paper to LEWG for their consideration for C++26, and see again in EWG based on their feedback.

SF	F	N	A	SA
12	6	4	2	0

Result: consensus in favor

[wg21bot]

P3380R1 Extending support for class types as non-type template parameters (Barry Revzin)

[FabioFracassi]

P3380R1: Extending support for class types as non-type template parameters

2025-02-12 Library Evolution Hagenberg Minutes

Champion: Barry Revzin
Chair: Fabio / Andreas
Minute Taker: Eddie

Summary

POLL: Rename meta::serializer/meta::deserializer to meta::info_serializer/meta::info_deserializer

SF	F	N	A	SA
2	5	12	4	0

Attendance: 27 (IP) + 6 (R)
Author Position: 2xN
Outcome: No consensus for a change

POLL: We approve the library interface (with the expectation that implementation experience emerges) and send P3380R1 forward to LWG and EWG for C++26

SF	F	N	A	SA
5	8	3	4	5

Attendance: 27 (IP) + 6 (R)
Author Position: 2xSF
Outcome: No consensus

SA: The implementation experience isn’t why I’m against, but did push me to strongly against. This feels very overwrought, and then there’s the backwards direction which is added only for checking.

SA: I would be SF if there was implementation experience.

Next Steps

No consensus to approve library interface, we ask for more implementation experience.