tokio's signal/mod.rs writes `use crate::sync::watch::Receiver;` and
tokio-stream `use tokio::sync::watch::Receiver;`, and both linked their
`Receiver<()>` to the `Receiver` of net/unix/pipe.rs. Every `Receiver` in
the crate read as in scope once the file imported one, and the first won.
isRustNameInScope now walks the modules a `use` path names, from the module
the `use` is written in: crate::, self::, super::, a module declared there
(2018 paths), the crate's own name, or a project crate its manifest depends
on. It looks the item up there as Rust does: declared in that module (not
inside a function or an inline module), else brought in by the module's own
`use` of that name, macro-wrapped ones included (tokio's `cfg_sync! { pub use
mutex::{Mutex, ...}; }`), else by its globs. A module declared inline, like
`pub mod futures { ... }`, is found by its braces. A candidate the path does
not name is out of scope, so every strategy, the framework name rule
included, lands on the item the path names.
What the walk can't follow says nothing, and name matching answers as
before: a module with no file, one a path attribute puts elsewhere, a glob
over an enum, a file whose braces don't balance. A module that holds no
such item the index knows, because a macro declares it or another crate
does, leaves nothing in scope. A `use` of the name that yields no item
doesn't hide the globs: clap's `pub use clap_derive::ValueEnum` is a derive
macro, and the trait comes in through `pub use clap_builder::*`.
A/B with fresh indexes, main 5530676f against this branch, every changed
edge triaged: tokio 233 links move to the item the path names and 78 wrong
links go (the real items are declared inside cfg_*! macros, or are std's
io::Result); axum 6 move; clap 20; ripgrep 49 move and 2 go (termcolor's
ColorChoice); gleam 404 move; dioxus 58 move. No right link is lost, and
527 more keep their target at a higher confidence. serde changes only
confidences; express, gin, flask and leveldb are byte-identical. The new
lookups cost about 0.2 s of CPU per full index of tokio or gleam.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
