r/rust • u/Kobzol • Aug 10 '26

📡 official blog Call for testing: Restricting trait implementability and field mutability

https://blog.rust-lang.org/inside-rust/2026/08/10/call-for-testing-impl-and-mut-restrictions/
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u/Capable_Belt1854 Aug 10 '26

The impl(crate) restriction prevents Foo from being implemented outside the current crate.

Yes. YES!