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Colby Mchenry
ed1a89fb0f
Using an enum only through its variants (`mode::Mode::A` in an expression,
`mode::Mode::A => 1` / `Mode::B => ...` in a match, a `Mode::C(x)` or
`Mode::D { .. }` pattern) recorded no reference to the enum, so code that
builds or matches variants was missing from the enum's callers and impact.
Only a type annotation (`fn takes(_m: Mode)`) produced one.
Cause: Rust was not in the static-member pass, which turns `Enum.value` /
`Type::CONST` reads into references for Java, C#, Kotlin, Swift, Scala,
Dart, PHP and C++, and a path to a variant that is not a call or a struct
literal reaches no other extractor.
Fix:
- Extraction (wasm extractor and native kernel, mirrored): a path whose
last segment is capitalized emits a `references` ref named by its
receiver (the segment before it; `Self` read as the impl's type, nothing
in a trait), positioned at the receiver, so a `mode::` prefix scopes it
exactly as it scopes a type annotation. Covers value reads, match arms,
`|` / `if let` patterns, tuple- and struct-variant patterns and a variant
passed as a value. A call's callee (`Mode::C(1)`, `Foo::new()`), a struct
literal, a longer path's prefix, a `use` tree and a lowercase receiver or
member emit nothing.
- Resolution (isRustNameInScope): a reference written `Name::Variant` or
`Self::Variant` lands only on an enum that declares that variant, after
the usual Rust scoping (module path, `use`, glob, prelude, std and
dependency imports). ripgrep's `Match::None` reaches `ignore`'s enum, not
the matcher's `struct Match`; std variants (`Ordering::Less`,
`Option::Some`) never reach a same-named project enum; associated consts
and functions (`Limits::MAX`, `Mode::ALL`, `Foo::new()`) reference no
type. `Self::X` is read as the impl's type, never through a path written
elsewhere on its line.
Adapted from #2330 by @danusha2345: the extraction half (both walkers) and
most of the tests are theirs. Changed here:
- The resolver accepts a declared variant only. #2330 also accepted any type
whose file holds a variable or const of the item's name; impl consts are
file-level variables in the graph, so that cannot tell a type's associated
const from another type's or a top-level one.
- The walkers check the node kind before looking at its parent, and the
body walk hands the parent down: #2330 called `parent()`, which walks down
from the tree's root, for every node of every body, which nearly doubled
the kernel's Rust extraction time on tokio (2.1 s -> 3.9 s); now within
noise of main.
- EXTRACTION_VERSION is not bumped again (already 28 on main).
Verification: __tests__/rust-enum-variant-reference.test.ts (10 tests):
6 fail on main in wasm mode, in kernel mode, and with this TypeScript over
main's kernel binary; 10/10 pass in both modes. The kernel parity case
covers every shape and asserts the refs exist; the kernel-parity sweep over
ripgrep, alacritty and tokio is 1004/1006 files byte-parity, 0 diffs (2
parse-error files defer to wasm by policy).
Validation (native kernel loaded, main -> branch, edges keyed by
QN/kind/file/line): ripgrep +822/-0, alacritty +917/-0, tokio +665/-0, all
`references -> enum`, node counts unchanged. Every added edge's source
reads `Name::Variant` / `Self::Variant` at its column and its target enum
declares that variant; no std enum targets. New symbol->enum pairs:
ripgrep +220, alacritty +253, tokio +254; enums with no referencer before
and one now: 31 / 13 / 31. One wrong target on tokio
(`oneshot::error::TryRecvError::Empty` -> mpsc's `TryRecvError`) comes
from the existing path rule that checks only the last module segment, which
type annotations share. Index time on tokio stays within noise of main
(interleaved runs; resolveOne time 27.7 s vs 31.2 s summed over workers).
Co-authored-by: danusha2345 <ewidusoc498@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>