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Auto merge of #139938 - matthiaskrgr:rollup-19ddpus, r=matthiaskrgr 

Rollup of 8 pull requests

Successful merges:

 - #139084 (hygiene: Rename semi-transparent to semi-opaque)
 - #139236 (Use a session counter to make anon dep nodes unique)
 - #139650 (Fix `register_group_alias` for tools)
 - #139770 (Rename `LifetimeName` as `LifetimeKind`.)
 - #139846 (Remove `kw::Empty` uses in rustdoc)
 - #139891 (Include optional dso_local marker for functions in `enum-match.rs`)
 - #139908 (parser: Remove old diagnostic notes for type ascription syntax)
 - #139917 (fix for multiple `#[repr(align(N))]` on functions)

Failed merges:

 - #139615 (Remove `name_or_empty`)

r? `@ghost`
`@rustbot` modify labels: rollup
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bors 2025-04-17 01:38:17 +00:00
parent 525f20e115 a81584edd7
commit f80260b014
1 changed files with 4 additions and 4 deletions
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src/ty.md
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@ -61,11 +61,11 @@ Here is a summary:
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Describe the *syntax* of a type: what the user wrote (with some desugaring). | Describe the *semantics* of a type: the meaning of what the user wrote. |
| Each `rustc_hir::Ty` has its own spans corresponding to the appropriate place in the program. | Doesn’t correspond to a single place in the user’s program. |
| `rustc_hir::Ty` has generics and lifetimes; however, some of those lifetimes are special markers like [`LifetimeName::Implicit`][implicit]. | `ty::Ty` has the full type, including generics and lifetimes, even if the user left them out |
| `rustc_hir::Ty` has generics and lifetimes; however, some of those lifetimes are special markers like [`LifetimeKind::Implicit`][implicit]. | `ty::Ty` has the full type, including generics and lifetimes, even if the user left them out |
| `fn foo(x: u32) → u32 { }` - Two `rustc_hir::Ty` representing each usage of `u32`, each has its own `Span`s, and `rustc_hir::Ty` doesn’t tell us that both are the same type | `fn foo(x: u32) → u32 { }` - One `ty::Ty` for all instances of `u32` throughout the program, and `ty::Ty` tells us that both usages of `u32` mean the same type. |
| `fn foo(x: &u32) -> &u32)` - Two `rustc_hir::Ty` again. Lifetimes for the references show up in the `rustc_hir::Ty`s using a special marker, [`LifetimeName::Implicit`][implicit]. | `fn foo(x: &u32) -> &u32)`- A single `ty::Ty`. The `ty::Ty` has the hidden lifetime param. |
| `fn foo(x: &u32) -> &u32)` - Two `rustc_hir::Ty` again. Lifetimes for the references show up in the `rustc_hir::Ty`s using a special marker, [`LifetimeKind::Implicit`][implicit]. | `fn foo(x: &u32) -> &u32)`- A single `ty::Ty`. The `ty::Ty` has the hidden lifetime param. |
[implicit]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/hir/enum.LifetimeName.html#variant.Implicit
[implicit]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/hir/enum.LifetimeKind.html#variant.Implicit
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