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Rollup merge of #134367 - WaffleLapkin:trait_upcasting_as_a_treat, r=compiler-errors

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Stabilize `feature(trait_upcasting)`

This feature was "done" for a while now, I think it's finally time to stabilize it! Stabilization report: https://github.com/rust-lang/rust/pull/134367#issuecomment-2545839841.
cc reference PR: https://github.com/rust-lang/reference/pull/1622.

Closes #65991 (tracking issue), closes #89460 (the lint is no longer future incompat).

r? compiler-errors
This commit is contained in:
Matthias Krüger 2025-02-07 18:26:25 +01:00 • committed by GitHub
commit cbd44d7998
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94 changed files with 140 additions and 479 deletions
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3
compiler/rustc_feature/src/accepted.rs
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@ -400,6 +400,9 @@ declare_features! (
/// Allows `#[track_caller]` to be used which provides
/// accurate caller location reporting during panic (RFC 2091).
(accepted, track_caller, "1.46.0", Some(47809)),
/// Allows dyn upcasting trait objects via supertraits.
/// Dyn upcasting is casting, e.g., `dyn Foo -> dyn Bar` where `Foo: Bar`.
(accepted, trait_upcasting, "CURRENT_RUSTC_VERSION", Some(65991)),
/// Allows #[repr(transparent)] on univariant enums (RFC 2645).
(accepted, transparent_enums, "1.42.0", Some(60405)),
/// Allows indexing tuples.

3
compiler/rustc_feature/src/unstable.rs
View file

@ -634,9 +634,6 @@ declare_features! (
(unstable, thread_local, "1.0.0", Some(29594)),
/// Allows defining `trait X = A + B;` alias items.
(unstable, trait_alias, "1.24.0", Some(41517)),
/// Allows dyn upcasting trait objects via supertraits.
/// Dyn upcasting is casting, e.g., `dyn Foo -> dyn Bar` where `Foo: Bar`.
(unstable, trait_upcasting, "1.56.0", Some(65991)),
/// Allows for transmuting between arrays with sizes that contain generic consts.
(unstable, transmute_generic_consts, "1.70.0", Some(109929)),
/// Allows #[repr(transparent)] on unions (RFC 2645).