What problem does this solve?

This can be done with a WinEnter autocmd.

This could be interesting, because it provides a "history" of object (win/buf/tabpage) usage. I think we clearly want last-used history, and last_used: datetime could avoid maintaining an extra ringbuffer for each object type.

So instead of:

histget('win')
histget('buf')
histget('tabpage')

users/plugins could get the last-used history by sorting on last_used. And even if we provide histget('win'), that could internally use the same approach.

Use-cases: Having a history of last-used bufs/wins/tabs would

• improve the behavior of g<tab>
• helps implement ZB (delete buffer without losing split)
• helps implement histget('win'), histget('buf'), etc.

Caveat: multple windows could have the same last_used timestamp, then the "history" is not 100% reliable. But storing microsecond-granularity should be good enough.

Hi All,

Thank you for looking into this PR, if you want more context for this chance, please take a look at #28745