On Fri, Mar 26, 2021 at 2:00 PM David Rector via SG7 <sg7@lists.isocpp.org> wrote:

Attached is a new paper addressing how the P2237/P2230 facilities might be expanded to be able handle the `Sum<T,U>` example discussed awhile back, and more generally subsume the capabilities of the "string-injection" approach, while avoiding its drawbacks.

Hi David,

I didn't understand the Sum<T, U> example before and I still don't. There's not really a description of it in the paper, just a lot of code. What problem is it demonstrating?

Barry