New Rustacean News: Rust 1.31 and the 2018 Edition, Part I

[chriskrycho]

Yes, this is almost a month late. Yes, it's 2 parts! But there's a lot to cover, and December was busy with the new website launch and the holidays!

• show notes
• direct download
• script

https://www.podtrac.com/pts/redirect.mp3/f001.backblazeb2.com/file/newrustacean/news/rust_1_31/part_1.mp3

[scottmcm]

@from the show script

So now you can write impl TheTrait for TheType<'a> – no more lifetime annotation on the impl keyword!

Note that that's in-band lifetimes, which didn't stabilize. Only the impl TheTrait for TheType<'_> form stabilized. More details in https://rust-lang-nursery.github.io/edition-guide/rust-2018/ownership-and-lifetimes/lifetime-elision-in-impl.html or in Tracking issue for lifetime elision for impl headers (feature impl_header_lifetime_elision) · Issue #15872 · rust-lang/rust · GitHub

[chriskrycho]

Ah. That’s a very subtle difference! Thank you; I’ll add a correction to the show notes!