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(Re-)Implement impl_trait_in_bindings

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Michael Goulet 2024-12-11 22:18:39 +00:00
parent 1da411e750
commit d714a22e7b
45 changed files with 391 additions and 25 deletions
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3
compiler/rustc_feature/src/removed.rs
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@ -126,9 +126,6 @@ declare_features! (
better implied higher-ranked implied bounds support"
)
),
/// Allows `impl Trait` in bindings (`let`, `const`, `static`).
(removed, impl_trait_in_bindings, "1.55.0", Some(63065),
Some("the implementation was not maintainable, the feature may get reintroduced once the current refactorings are done")),
(removed, import_shadowing, "1.0.0", None, None),
/// Allows in-band quantification of lifetime bindings (e.g., `fn foo(x: &'a u8) -> &'a u8`).
(removed, in_band_lifetimes, "1.23.0", Some(44524),

2
compiler/rustc_feature/src/unstable.rs
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@ -517,6 +517,8 @@ declare_features! (
(unstable, if_let_guard, "1.47.0", Some(51114)),
/// Allows `impl Trait` to be used inside associated types (RFC 2515).
(unstable, impl_trait_in_assoc_type, "1.70.0", Some(63063)),
/// Allows `impl Trait` in bindings (`let`).
(unstable, impl_trait_in_bindings, "1.64.0", Some(63065)),
/// Allows `impl Trait` as output type in `Fn` traits in return position of functions.
(unstable, impl_trait_in_fn_trait_return, "1.64.0", Some(99697)),
/// Allows associated types in inherent impls.