P2686 R5 constexpr structured bindings and references to constexpr variables

[wg21bot]

P2686R0 Updated wording and implementation experience for P1481 (constexpr structured bindings) (Corentin Jabot)

[jfbastien]

Previous paper: #236

[erichkeane]

Forward P2686R0 to CWG for inclusion in C++26.

SF	F	N	A	SA
1	13	3	0	0

Result: Consensus

Require explanation of limitation for template parameters, and limitations around bitfields in the structured bindings

[jensmaurer]

CWG 2023-02-07: Reviewed; needs updates.

[jensmaurer]

CWG reflector discussion starting 2023-04-09: There are several (more or less general) avenues to deliver the desired feature. A revision of the paper should contain a discussion of the various options (with examples), which CWG will briefly review and then forward to EWG to make a choice.