EEDITIONS
In Chapter 1, you saw that cargo new adds a bit of metadata to your Cargo.toml file about an edition. This appendix talks about what that means!
The Rust language and compiler have a six-week release cycle, meaning users get a constant stream of new features. Other programming languages release larger changes less often; Rust releases smaller updates more frequently. After a while, all of these tiny changes add up. But from release to release, it can be difficult to look back and say, “Wow, between Rust 1.10 and Rust 1.31, Rust has changed a lot!”
Every two or three years, the Rust team produces a new Rust edition. Each edition brings ...
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