P3687 R0 Final Adjustments to C++26 Reflection

[wg21bot]

P3687R0 Final Adjustments to C++26 Reflection (Dan Katz, Wyatt Childers, Daveed Vandevoorde, Ville Voutilainen)

[hanickadot]

EWG saw D3687R1 (uploaded to EWG telecon wiki) on a telecon on 2025-06-05

D3687R1: Forward the removal of splice-template-arguments as proposed in D3687R1 to CWG as a modification to D2996R13 for inclusion in C++26.

SF	F	N	A	SA
10	6	2	0	0

Result: Consensus

D3687R1: Instruct CWG to make unparenthesized splice-specifiers in template arguments ill-formed in D2996R13, and include it in C++26.

SF	F	N	A	SA
4	8	3	2	0

Result: Consensus

We will pick one of following two which will have greated consensus:

D3687R1: Forward the reflection of "entity proxies" as proposed in D3687R1 to CWG as a modification to D2996R13 for inclusion in C++26.

SF	F	N	A	SA
4	2	2	7	2

Result: Not Consensus

D3687R1: Forward the proposal to make ^^id ill-formed when id names a using-declaration from D3687R1 to CWG as a modification to D2996R13 for inclusion in C++26.

SF	F	N	A	SA
4	7	5	0	1

Result: Consensus

[hanickadot]

EWG saw this paper in Sofia on Monday to confirm decision take on telecon:

D3687R1: Forward the removal of splice-template-arguments as proposed in D3687R1 to CWG as a modification to D2996R13 for inclusion in C++26.

SF	F	N	A	SA
11	24	3	0	0

Result: consensus

D3687R1: Instruct CWG to make unparenthesized splice-specifiers in template arguments ill-formed in D2996R13, and include it in C++26.

SF	F	N	A	SA
6	23	5	0	0

Result: consensus

D3687R1: Forward the proposal to make ^^id ill-formed when id names a using-declaration from D3687R1 to CWG as a modification to D2996R13 for inclusion in C++26.

SF	F	N	A	SA
4	13	13	2	0

Result: consensus

[jensmaurer]

This has been integrated into P2996 #1668.