What's New in Rust 1.79 and 1.80

Rustacean Station

Jon and Ben discuss the highlights of the 1.79 and 1.80 releases of Rust.

Contributing to Rustacean Station

Rustacean Station is a community project; get in touch with us if you’d like to suggest an idea for an episode or offer your services as a host or audio editor!

• Twitter: @rustaceanfm
• Discord: Rustacean Station
• Github: @rustacean-station
• Email: [email protected]

Timestamps & referenced resources

[@01:02] - Rust 1.79

• [@01:02] - Inline const expressions
• [@08:33] - Bounds in associated type position
• [@14:11] - Extending automatic temporary lifetime extension
  • Mara’s blog post on temporary lifetimes
• [@21:55] - Frame pointers enabled in standard library builds
  • Does omitting the frame pointer really affect performance?
• [@25:37] - Stabilized APIs
  • [@25:37] - {integer}::unchecked_add
  • [@27:39] - <*const [T]>::len
  • [@29:21] - <[u8]>::utf8_chunks
  • [@31:21] - CStr::count_bytes
  • [@32:41] - num::NonZero
  • [@36:30] - io::Error::downcast
  • [@36:50] - path::absolute
• [@38:18] - Changelog deep-dive
  • [@38:31] - Stabilize WASM target features that are in phase 4 and 5
  • [@39:15] - Document overrides of clone_from() in core/std
  • [@41:46] - Switch to using gitoxide by default for listing files in cargo
  • [@43:03] - Stabilize lint unnameable_types
  • [@44:46] - manual_clamp lint

[@45:46] - Rust 1.80

• [@46:09] - LazyCell and LazyLock
• [@53:42] - Checked cfg names and values
  • Detailed blog post on checked cfg
• [@56:41] - Exclusive ranges in patterns
• [@58:52] - Stabilized APIs
  • [@59:05] - Vec::<[T; N]>::into_flattened
    • <[[T; N]]>::as_flattened
  • [@1:00:31] - <[u8]>::trim_ascii
  • [@1:02:06] - NonNull::add and other ptr-like methods
  • [@1:03:41] - impl IntoIterator for Box<[T]>
  • [@1:05:46] - Option::take_if
  • [@1:07:30] - Ipv4Addr::to_bits
• [@1:09:10] - Changelog deep-dive
  • [@1:09:25] - x86_64-unknown-linux-none
  • [@1:11:07] - Add size_of and align_of to the prelude
  • [@1:12:34] - Never type fallback flowing into unsafe
  • [@1:17:29] - New panics and aborts in the standard library
    • Abort when OwnedFd is violated
    • Panic if set_extension adds /
  • [@1:20:28] - Restore enum variants in rustdoc for type aliases
  • [@1:21:12] - Change assigning_clones lint to pedantic
  • [@1:22:15] - Turn lints into hard errors
  • [@1:22:49] - env::set_var regression
  • [@1:24:34] - StdoutLock regression

[@1:26:00] - Rust 1.80.1

Fixes miscompilation when comparing floats and false positives in the dead_code lint.

Credits

Intro Theme: Aerocity

Audio Editing: Jon Gjengset

Hosting Infrastructure: Jon Gjengset

Show Notes: Jon Gjengset

Hosts: Jon Gjengset and Ben Striegel