May 08, 2020

What's New in Rust 1.42 and 1.43

1 hour 10 minutes

Jon and Ben examine the features of Rust 1.42 and Rust 1.43.

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Timestamps & referenced resources

[@01:45] - Useful line numbers on unwrap

#[track_caller]

[@04:22] - Subslice patterns

Stabilization report

Ignoring with ..

@-patterns

struct updates with ..

[@16:09] - matches!

Macro documentation

Jon proposes assert_matches

[@18:13] - Error::description deprecation

RFC

Soft deprecation in 1.27

failure

thiserror

anyhow

eyre

Jane expermenting with track_caller in eyre

[@24:23] - Other changes in 1.42

Documentation improvements to cargo

[@26:47] - Rust 1.43

[@27:17] - item macro fragments and parser improvements in general

More details about the problem

PR that fixed this

[@33:30] - Primitive type inference

[@36:22] - Smaller changes surfacing in release notes

Steve Klabnik’s blog post

Rust 2020 roadmap on “finishing things”

[@39:00] - New cargo environment variables

Cargo target directory

assert_cmd

Environment variables set by cargo

[@43:39] - Associated consts on numeric types

Ben’s RFC

Issue from way back when

The associated constants PR (2015)

max_value PR (2015)

PR for Ben’s RFC

[@51:54] - What can we do in an edition?

Error::source RFC

[@54:20] - The primitive module

use paths

The Rust prelude

Next edition prelude

[@57:50] - String implements AsMut

[@59:40] - cargo profile in config

cargo global configuration

[@1:02:03] - New feature resolver

cargo merges features between dependency types

[@1:05:30] - Lots of new clippy lints: 1.42, 1.43

All the clippy lints

Pruning unwanted clippy lints

[@1:08:52] - Rustfest postponed

Credits

Intro Theme: Aerocity

Audio Editing: @alphastrata

Hosting Infrastructure: Jon Gjengset

Show Notes: Jon Gjengset

Hosts: Jon Gjengset and Ben Striegel

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