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Radar · Rust · Archive · Week 30 · Jul 20 – 26, 2026

Syn 3.0.0 released

Worth knowingtooling

What changed
The Syn crate reached version 3.0.0.
Production impact
The source does not say.
Try it
Add syn = "3.0" to a Cargo project and run cargo check.
Source
this-week-in-rust.org/blog/2026/07/22/this-week-in-rust-661/

Understand it, then run it

Syn is a crate that lets Rust programs read and understand Rust code. The announcement says that Syn has reached version 3.0.0. This is a milestone for the crate, but it does not change how you write Rust code. The change is only a new release number, not a new feature or API.

Written by gpt-oss-20b from the linked source · claims checked against the sources · archive, not individually reviewed