P1393 A General Property Customization Mechanism

[jensmaurer]

P1393R0 A General Property Customization Mechanism (Daisy Hollman, Chris Kohlhoff, Bryce Lelbach, Jared Hoberock, Gordon Brown, Michał Dominiak)

[tituswinters]

LEWG in Kona:
Forward P1393 to LWG for C++20.
SF F N A SA
4 7 3 7 7

Forward P1393 to LWG for a to-be-formed Executors TS.
SF F N A SA
3 4 13 3 7

Forward P1393 to LWG for C++Next.
SF F N A SA
11 7 4 6 2

Should be seen by LWG, no sooner than Belfast. Other Executors-related pieces will go to LEWG starting in Cologne for the C++23/C++Next cycle.

[jfbastien]

@tituswinters has asked that EWG see the paper.

[jfbastien]

EWG Prague Thursday afternoon: we saw the paper and will take a bit more time to understand what this paper does and why it does it in that particular way. We'll come back to it.