concat_idents!
`concat_idents!` was deprecated in [1] and will be removed in the near future. rust-analyzer's support is independent of rustc's, so drop RA support now to make syncing easier. [1]: https://github.com/rust-lang/rust/pull/137653
shrink_to_fit()
Semantics<'db, DB>
Semantics<'db, dyn HirDatabase>
DB: ?Sized
might_be_inside_macro_call()
AsAny
salsa::Id::from_u32()
parser::Input
null