Read Rust
clippy2019 was a great year for clippy. It’s available on stable, even installed by default in the Rust distribution and selectable as a rustup component. We have more than 300 lints, and the upwards trend is unbroken. The lints that we have also see a steady stream of improvements.
By the end of the year I found myself mulling a question that I thought should have a definite answer, but so far it seems to have eluded us: Should clippy lint code expanded from macros? And if so, also from macros defined outside of the current crate?