p1664 - reconstructible_range and ranges::reconstruct Extension Point

[ThePhD]

The same paper as #20, but it needs to be redone to stick it to the fact that string_view is the only string view type it works with, and that it'll exclude Niall Douglass's io_span and similar.

This is because we hard-coded string_view, span, and other types directly into the "reduce template bloat" paper from Hannes Hauswedell. This was a compromise, and absolutely the wrong decision.

[ThePhD]

Oh look it's been redone what a nice life I'm living here.

https://thephd.github.io/_vendor/future_cxx/papers/d1664.html

[ThePhD]

Paper pivoted. We're using a strong adl extension point modeled after begin now.

Also it has to take a trip through SG9. Gonna be here for a long time, probably...

https://thephd.dev/_vendor/future_cxx/papers/d1664.html