P2077R3: Heterogeneous erasure overloads for associative containers

[ldionne]

Link: https://wg21.link/P2077R3

[rsaddatimov]

Hi! I want to give this one a try

[ldionne]

Un-assigning since there is no PR yet.

[rsaddatimov]

Hi! There's my PR linked to this issue #174680

[rsaddatimov]

@ldionne Hi! Seems like I was accidentally unassigned from this issue and my pr is forgotten. Can I get a quick review please?

[ldionne]

@rsaddatimov Ack, sorry for the mixup, putting you on the review stack.

[rsaddatimov]

Nice, thank you! PR needs to be rebased, I'll do it as soon as possible