Dear SG12,

As you may have noticed, the P1631R0 in the Cologne mailing was a
standin paper for something better. I link now to something better,
though it would hardly count as complete. Still, it ought to be enough
for SG12 to say whether to reject this whole approach, or whether to
continue work in this direction.

https://dedi5.nedprod.com/static/files/other/P1631R0.pdf

Niall