rust/compiler/rustc_passes
Nicholas Nethercote 661f99ba03 Overhaul the intravisit::Map trait.
First of all, note that `Map` has three different relevant meanings.
- The `intravisit::Map` trait.
- The `map::Map` struct.
- The `NestedFilter::Map` associated type.

The `intravisit::Map` trait is impl'd twice.
- For `!`, where the methods are all unreachable.
- For `map::Map`, which gets HIR stuff from the `TyCtxt`.

As part of getting rid of `map::Map`, this commit changes `impl
intravisit::Map for map::Map` to `impl intravisit::Map for TyCtxt`. It's
fairly straightforward except various things are renamed, because the
existing names would no longer have made sense.

- `trait intravisit::Map` becomes `trait intravisit::HirTyCtxt`, so named
  because it gets some HIR stuff from a `TyCtxt`.
- `NestedFilter::Map` assoc type becomes `NestedFilter::MaybeTyCtxt`,
  because it's always `!` or `TyCtxt`.
- `Visitor::nested_visit_map` becomes `Visitor::maybe_tcx`.

I deliberately made the new trait and associated type names different to
avoid the old `type Map: Map` situation, which I found confusing. We now
have `type MaybeTyCtxt: HirTyCtxt`.
2025-02-17 13:21:35 +11:00
..
src Overhaul the intravisit::Map trait. 2025-02-17 13:21:35 +11:00
Cargo.toml compiler: start using rustc_ast_lowering in rustc_passes 2025-02-09 20:45:47 -08:00
messages.ftl Auto merge of #119286 - jyn514:linker-output, r=bjorn3 2025-01-25 17:16:33 +00:00