cargo-semver-checks v0.35 can determine whether Rust traits are

Is this trait sealed, or not sealed — that is the question

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2024-10-18 18:00:13

cargo-semver-checks v0.35 can determine whether Rust traits are "sealed", allowing it to catch many tricky new instances of SemVer breakage. Why is accurate sealed trait detection so important, and why is implementing it correctly so hard?

The answer: "it depends." It might be breaking, or it might not be — we can't tell yet. This essay digs into why that simple question is so tricky to answer. Spoiler: it depends on whether the Example trait is "sealed" — downstream crates cannot create their own implementations of sealed traits.

Good news though: cargo-semver-checks users can rest easy! In its latest release, cargo-semver-checks has become a world-class expert at applying these rules in fractions of a second. It's both faster and more accurate than humans could ever be!

Using cargo-semver-checks means we don't all have to invest our skill points into the minutia of SemVer in Rust. Let automation take care of it!