Supertrait Auto Impl #436
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Supertrait Auto Impl #436
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Thank you! This is a good draft and helped me understand the proposal a bit better. There's a few sections we'll need to fill out but I think the overall idea and direction are pretty clear. |
nikomatsakis
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Jan 5, 2026
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| ## Motivation | ||
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| Trait evolution and trait hierarchy refactoring has been. As crates evolve and grow, needs to restructure trait hierarchy to accommodate richer functionality often arises, both in the standard library and the broader Rust ecosystem. |
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| Trait evolution and trait hierarchy refactoring has been. As crates evolve and grow, needs to restructure trait hierarchy to accommodate richer functionality often arises, both in the standard library and the broader Rust ecosystem. | |
| Trait evolution and trait hierarchy refactoring is a long-time pain point for Rust crates and especially the standard library. As crates evolve and grow, needs to restructure trait hierarchy to accommodate richer functionality often arises, both in the standard library and the broader Rust ecosystem. |
This is an incomplete sentence...maybe something like that?
| | [cargo] | | | | ||
| | [compiler] | | | | ||
| | [infra] | | | | ||
| | [lang] | | | |
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| | [lang] | | | | |
| | [lang] | Medium | Team aligned already on the shape of the feature | |
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We are applying a 2026 project goal status for
supertrait_auto_implfor accelerated development of the language feature as defined in rust-lang/rfcs#3851 as our solution to the trait evolution question.