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"classic2021" ruleset: experimentally add fallback-to-outer (eat both)

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My reasoning: the ruleset implemented by the same feature gate in
Edition 2024 always tries to eat the inherited reference first. For
consistency, it makes sense to me to say across all editions that users
should consider the inherited reference's mutability when wondering if a
`&mut` pattern will type.
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dianne 2025-01-26 04:20:30 -08:00
parent 799e0f7690
commit 20149629ba
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src/doc/unstable-book/src/language-features/ref-pat-eat-one-layer-2024.md
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@ -16,5 +16,5 @@ For more information, see the corresponding typing rules for [Editions 2021 and
For alternative experimental match ergonomics, see the feature
[`ref_pat_eat_one_layer_2024_structural`](./ref-pat-eat-one-layer-2024-structural.md).
[Editions 2021 and earlier]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAQABAQABAAAAAQEBAAEBAAABAAA%3D&mode=rules&do_cmp=false
[Editions 2021 and earlier]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAQIBAQABAAAAAQEBAAEBAAABAAA%3D&mode=rules&do_cmp=false
[Editions 2024 and later]: https://nadrieril.github.io/typing-rust-patterns/?compare=false&opts1=AQEBAAABAQABAgIAAQEBAAEBAAABAAA%3D&mode=rules&do_cmp=false