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| author | Waffle Lapkin <waffle.lapkin@gmail.com> | 2024-12-16 03:51:01 +0100 |
|---|---|---|
| committer | Waffle Lapkin <waffle.lapkin@gmail.com> | 2025-02-06 23:44:23 +0100 |
| commit | 9e6d0b3700891b8a99ad762ba3de9e08dfb60b1d (patch) | |
| tree | a21e5f34c811e4086502a60b2b18eebc6a961cb4 | |
| parent | e9d5d1113f9a5ca0ace2d1b13b1525f43ec97211 (diff) | |
| download | rust-9e6d0b3700891b8a99ad762ba3de9e08dfb60b1d.tar.gz rust-9e6d0b3700891b8a99ad762ba3de9e08dfb60b1d.zip | |
remove unstable book entry for `feature(trait_upcasting)`
| -rw-r--r-- | src/doc/unstable-book/src/language-features/trait-upcasting.md | 26 |
1 files changed, 0 insertions, 26 deletions
diff --git a/src/doc/unstable-book/src/language-features/trait-upcasting.md b/src/doc/unstable-book/src/language-features/trait-upcasting.md deleted file mode 100644 index a5f99cc86f2..00000000000 --- a/src/doc/unstable-book/src/language-features/trait-upcasting.md +++ /dev/null @@ -1,26 +0,0 @@ -# `trait_upcasting` - -The tracking issue for this feature is: [#65991] - -[#65991]: https://github.com/rust-lang/rust/issues/65991 - ------------------------- - -The `trait_upcasting` feature adds support for trait upcasting coercion. This allows a -trait object of type `dyn Bar` to be cast to a trait object of type `dyn Foo` -so long as `Bar: Foo`. - -```rust,edition2018 -#![feature(trait_upcasting)] - -trait Foo {} - -trait Bar: Foo {} - -impl Foo for i32 {} - -impl<T: Foo + ?Sized> Bar for T {} - -let bar: &dyn Bar = &123; -let foo: &dyn Foo = bar; -``` |