book-status.md

Here's the features I have marked for the edition:

Feature stable

done	name	comment
*	impl Trait
*	dyn Trait
*	SIMD	not going in the book, more of a stdlib thing
	tools	some done, some not, some stable, some not
	default match bindings	hoping to be done for preview 2
	unit tests with non-() return types	just stabilized!

Feature unstable

name	comment
pin types	rejected from the book as more of a stdlib thing
custom allocators	rejected from the book, not "how do I learn Rust"
never type	stuck in stabilization hell
main with non-() return types	some stuff is done? I think?
implied bounds	final comment on tracking PR is instructive
macros 1.2	alex is trying to stabilize
macro modularization	being worked on
raw identifiers	looks like someone just needs to start stabilizing?
path clarity	no idea how far along this is
Infer T: 'x outlives requirements	no clue at all
lifetime elision in impl headers	had wrong tracking issue tagged, now fixed
arbitrary self types	not even a tracking issue?
nll	actually a small diff for the book
anonymous lifetime syntax	rust-lang/rust#48469 was supposed to be the tracking issue... don't know why it's not stable or where to track it
in-band lifetimes	no clue

Are any of these not in the edition anymore? Any comments about specific things I've said about them in the comments?

Things that won't make the Edition:

• never type
• implied bounds

Things that are already stable:

• anonymous lifetime syntax

Things that are not yet implemented (and unlike to make it):

• The T: 'x inference

Everything else on the list is roughly on track for stabilization, but in some cases there may be changes on the way. We're hoping to FCP several of these for 1.29.