GitNexus/gitnexus/test/fixtures/lang-resolution/rust-dup-fields-2/src
Gergő Magyar 170805647c
fix(rust): keep duplicate type names ambiguous in range binding (#2514) (#2652)
* fix(rust): latch duplicate type-name ambiguity in range binding (#2514)

The range-binding prepass tracked cross-file return and field types in two
maps and used map presence itself as the ambiguity flag: the second definition
of a name deleted it, but a third definition found it absent and re-inserted
the last-scanned file's type. Odd duplicate counts (3, 5, ...) therefore
resolved a genuinely ambiguous name to whichever file was scanned last, while
even counts stayed ambiguous.

Latch ambiguity in a dedicated Set per registry (ambiguousReturnTypes,
ambiguousFieldTypes): once a name has two or more workspace definitions it
never resolves again, regardless of duplicate count or file order.

Adds integration coverage for two/three-duplicate functions and structs,
permuted file order, and a unique-name over-suppression guard.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* fix(rust): bump INCREMENTAL_SCHEMA_VERSION to 12 for the #2514 range-binding fix

The duplicate-name ambiguity latch changes which cross-file Rust CALLS edges
the range-binding prepass emits. The incremental writeback persists only
changed-file nodes, so an incremental top-up against a pre-v12 index would keep
the old spurious edges on every unchanged Rust file. Bump the schema version to
force a one-time full re-analyze, matching the v7/v11 contract for
edge-affecting resolver changes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* feat(rust): resolve import-disambiguated duplicate types in for-loops & destructuring

Follow-up to the #2514 ambiguity latch. When several modules define the same
function/struct name and a call site disambiguates it with a `use` import
(including aliases and `use x::*` globs), range-binding now resolves the
for-loop element type and the destructured field type to that specific imported
definition, instead of leaving it unresolved.

The bare-name return/field maps are (correctly) ambiguous for duplicates, but
the call site's import pins a definition. range-binding records the full,
untruncated return/field type per defining file, and resolveImportedDef()
resolves a name to the single in-scope definition, mirroring Rust name
resolution:

  - tier 1: explicit `use`/re-export imports and local defs (lookupBindingsAt);
    these shadow globs, so if any exist we decide within them alone;
  - tier 2: glob imports, consulted only when tier 1 is empty; a
    `wildcard-expanded` ImportEdge names the target module, so we resolve only
    when exactly one glob-target file actually defines the name.

Two or more visible definitions stay unresolved, preserving the #2514 latch.
normalizeRustReturnType is untouched (its Vec<T> -> Vec truncation is
load-bearing for receiver resolution), so the full generic is read from the
per-file map instead.

Covered by integration tests: explicit / aliased / single-glob imports resolve
to the imported definition; two globs that both export the name stay ambiguous;
a local definition shadows a glob; no-import duplicates stay unresolved (#2514).

INCREMENTAL_SCHEMA_VERSION stays at 12 (bumped by the #2514 commit in this PR);
its note now also covers these added resolution edges.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* perf(rust): parse each file once in range-binding when the workspace fits a budget

populateRustRangeBindings makes two passes over every file and, because the
shared treeCache is empty in the analyze flow, re-parsed each file in both — a
workspace of N files paid 2N parses. It now parses each file once and reuses the
tree across both passes via an in-function store, gated by a source-byte budget:
workspaces up to 16 MiB of Rust source (essentially every real repo) reuse
trees; larger ones fall back to per-pass re-parsing so peak RSS stays bounded on
huge repos (the memory-sensitive case keeps its current profile).

Also collapses the parse+timeout boilerplate that was copy-pasted in both loops
into one getOrParseTree helper, and adds a PROF-gated `rangeBind=` segment to
the scope-resolution profiler for phase-level observability.

Measured on a 500-file synthetic Rust workspace (PROF_SCOPE_RESOLUTION=1): the
range-binding phase drops ~370ms -> ~320ms (~14%), parses 1000 -> 500. Behavior
is unchanged (199 rust + range-binding-order + parse-timeout tests green); repos
above the budget are unaffected.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* test(rust): update schema-version gate to v12; regenerate golden + bench baseline for new fixtures

CI surfaced three deterministic-artifact failures, all from this PR's own additions:

- call-summary-schema-version.test.ts hardcoded INCREMENTAL_SCHEMA_VERSION === 11
  (the #2604 window); #2514 bumped it to 12. Update the gate and extend the
  reuse-gate version history so a v11 stamp now forces a full re-analyze.
- rust-captures-golden expected-captures.json drifted (130 -> 174 entries) because
  the new rust-import-* / rust-dup-* fixtures joined the rust-* corpus. Regenerated
  (UPDATE_GOLDEN=1): additions only, no existing captures changed — emitRustScopeCaptures
  is untouched.
- bench/scope-capture/baselines.json rust fingerprint drifted for the same reason.
  Rebaselined with a provenance note; scaling 1.06 < 1.5 budget.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude <claude@anthropic.com>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-23 13:43:24 +01:00
..
c_a.rs fix(rust): keep duplicate type names ambiguous in range binding (#2514) (#2652) 2026-07-23 13:43:24 +01:00
c_b.rs fix(rust): keep duplicate type names ambiguous in range binding (#2514) (#2652) 2026-07-23 13:43:24 +01:00
main.rs fix(rust): keep duplicate type names ambiguous in range binding (#2514) (#2652) 2026-07-23 13:43:24 +01:00