Rollup merge of #138384 - nnethercote:hir-ItemKind-idents, r=fmease

Browse Source

Move `hir::Item::ident` into `hir::ItemKind`.

 `hir::Item` has an `ident` field.

- It's always non-empty for these item kinds: `ExternCrate`, `Static`, `Const`, `Fn`, `Macro`, `Mod`, `TyAlias`, `Enum`, `Struct`, `Union`, Trait`, TraitAalis`.

- It's always empty for these item kinds: `ForeignMod`, `GlobalAsm`, `Impl`.

- For `Use`, it is non-empty for `UseKind::Single` and empty for `UseKind::{Glob,ListStem}`.

All of this is quite non-obvious; the only documentation is a single comment saying "The name might be a dummy name in case of anonymous items". Some sites that handle items check for an empty ident, some don't. This is a very C-like way of doing things, but this is Rust, we have sum types, we can do this properly and never forget to check for the exceptional case and never YOLO possibly empty identifiers (or possibly dummy spans) around and hope that things will work out.

This is step towards `kw::Empty` elimination (#137978).

r? `@fmease`

...

This commit is contained in:

Matthias Krüger 2025-03-17 22:49:04 +01:00 committed by GitHub

parent 82393cf487 721f56734e

commit cc78cd7e2f

No known key found for this signature in database

GPG Key ID: B5690EEEBB952194

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Show Stats Download Patch File Download Diff File Expand all files Collapse all files

Diff Content Not Available