Pitch: `borrow` and `inout` declaration keywords

[ksluder (Kyle Sluder)]

@JuneBash

However, I do hope that the core team is open to revising proposals after they've been accepted as other related proposals come in before the next major Swift release

I think it’s pretty important that the pieces feel like they mesh and layer well from the outset. Swift’s adoption level is too high nowadays for big spelling changes to be tolerated, even in major language revisions. Trying to retroactively change anything about sendability produces serious frustration.

By the way, the chart you drew up reminds me very much of my own chart from back in December.

@Jumhyn

I don't believe John was attempting to 'foreclose' anything, but it is the case that with the acceptance of borrow/borrowing parameter modifiers there will be a (short-lived) rule that borrow always means 'immutable'.

Hah, fair.