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fix(typescript): name HOC-wrapped const declarations (forwardRef / memo / useCallback / useMemo / observer) (#1261)
* fix(typescript): name HOC-wrapped const declarations (forwardRef / memo / useCallback / useMemo / observer / debounce)

Follow-up to issue #1166 / PR #1175. After fixing HOF callbacks (Promise
fan-out, queryFn pair-arrows, multi-action Zustand stores) and JSX-as-call,
the dominant residual 0%-capture pattern in real React UI codebases was
the HOC-wrapped variable declaration:

  const Button = React.forwardRef((props, ref) => { ... })
  const Card = memo((props) => { ... })
  const handleClick = useCallback(() => { ... }, [])
  const computed = useMemo(() => { ... }, [])
  const debouncedSearch = debounce((q) => { ... }, 250)

All share the AST shape `lexical_declaration > variable_declarator >
call_expression > arguments > arrow_function`. Pre-fix, neither the
registry-primary `query.ts` nor the legacy `tree-sitter-queries.ts` had
a `@declaration.function` pattern matching this shape, and the legacy
DAG's `tsExtractFunctionName` only walked `variable_declarator` and
`pair` parents — `arguments` parents fell through with `funcName = null`.

Result: every shadcn/Radix component, every memoised React component,
and every `useCallback` / `useMemo` callback bound to a const registered
as anonymous; calls inside attributed to the file. Sourcerer-fe audit:
~296 declarations affected (~57 forwardRef + ~21 memo + ~161 useCallback
+ ~57 useMemo).

Fix:
  - 4 new tree-sitter patterns in `languages/typescript/query.ts`
    (registry-primary), anchored on the inner arrow_function /
    function_expression — same anchor discipline as the existing
    `lexical_declaration` and `pair` patterns from PR #1175.
  - 8 mirrored patterns in `tree-sitter-queries.ts` (4 in
    TYPESCRIPT_QUERIES, 4 in JAVASCRIPT_QUERIES) for the legacy DAG
    and the CI parity gate.
  - New `arguments`-parent branch in `tsExtractFunctionName` that
    walks `arguments → call_expression → variable_declarator` and
    returns the const's name. Three guards keep it strictly scoped
    to HOC-wrapped declarations; bare statement-level HOC calls fall
    through anonymous.

Tests:
  - 11 integration tests + 9 minimal TS/TSX fixtures exercising
    forwardRef / memo / useCallback / useMemo / observer / debounce,
    with positive (named-Function + correct CALLS edge), negative
    (no phantom Functions for unbound HOCs, no phantom self-loops,
    no first-sibling-wins leakage), and cross-pollination assertions.
  - 8 new unit tests in `call-attribution-issue-1166.test.ts`
    pinning the legacy-DAG path: 6 attribution tests + 2
    @definition.function capture tests.

Trade-off documented inline: chained array-method declarations
(`const x = arr.find((y) => p(y))`) match the same shape and produce
a mostly-harmless phantom `Function:x` with one outgoing edge. The
false-positive cost is negligible vs. the React UI coverage gain.

Verification: - 11/11 typescript-hoc-wrapped (registry-primary)
  - 26/26 call-attribution-issue-1166 (8 new + 18 pre-existing)
  - 266/266 across all 4 typescript resolver test files (registry)
  - 236/236 typescript.test.ts on legacy DAG (CI parity gate)
  - 1693/1693 across all non-Kotlin/Swift resolver test files
  - tsc --noEmit clean; prettier clean; eslint clean (no new warnings)
Co-authored-by: Cursor <cursoragent@cursor.com>

* test(typescript): pin documented HOC trade-offs and close var-form parity gap

Addresses the four findings on PR #1261 (Claude bot review for #1261).
All findings flagged missing assertion tests for behaviour already documented
in code comments — none reported a real bug. The verdict was
"production-ready with minor follow-ups"; these tests strengthen the
documentation-to-test contract.

[medium #1] Array-method false-positive
  Pin `const found = items.find((item) => predicate(item))` →
  `predicate.attributedTo === 'found'` as an accepted FP. The const is a
  value, never invoked, so no incoming CALLS edge ever points at it; the
  outgoing edge is a minor mis-attribution we accept rather than maintain
  a HOC allowlist.

[medium #2] Nested HOCs (`memo(forwardRef(...))`) — no phantom Function:Wrapped
  Two integration tests in `typescript-hoc-wrapped.test.ts`:
    1. `Wrapped` is NOT a Function node (the outer call's first arg is a
       call_expression, not an arrow — no @declaration.function pattern
       matches the outer shape).
    2. The deepest arrow's `helper()` call is NOT attributed to
       Function:Wrapped (the deepest arrow is anonymous because
       call_expression.parent is `arguments`, not `variable_declarator`),
       and no Function-sourced CALLS originate from `nested.tsx`.

[medium #3] Multi-arrow argument dedup
  Pin `const x = call(() => first(), () => second())` — both arrows share
  the same `arguments → call_expression → variable_declarator` ancestor
  chain on the legacy DAG, so both attribute to "x". Documents the
  registry-primary dedup story alongside.

[low #4] `var X = HOC(...)` parity gap
  Registry-primary `query.ts` had `(variable_declaration ...)` HOC patterns
  but legacy `tree-sitter-queries.ts` (TS + JS) did not. Closes the gap by
  mirroring two `(variable_declaration ...)` HOC patterns into both legacy
  sections so the parity gate stays tight even if a codebase mixes
  `var X = HOC(...)` with `const X = HOC(...)`.

Validation
  - Targeted: 41/41 (28 unit + 13 integration) on registry-primary.
  - Broader TS suite: 60/60 across 4 resolver test files.
  - CI parity gate (`typescript.test.ts`): 236/236 on legacy DAG and 236/236
    on registry-primary.
  - Prettier clean. ESLint clean (5 pre-existing non-null-assertion
    warnings in the test file, unrelated). tsc --noEmit clean.

Co-authored-by: Cursor <cursoragent@cursor.com>

---------

Co-authored-by: Cursor <cursoragent@cursor.com>
2026-05-03 13:58:09 +01:00
..
fixtures fix(typescript): name HOC-wrapped const declarations (forwardRef / memo / useCallback / useMemo / observer) (#1261) 2026-05-03 13:58:09 +01:00
helpers fix(deps): upgrade @ladybugdb/core to 0.16.0 to resolve native segfaults (#1235) 2026-04-30 17:40:39 +01:00
integration fix(typescript): name HOC-wrapped const declarations (forwardRef / memo / useCallback / useMemo / observer) (#1261) 2026-05-03 13:58:09 +01:00
unit fix(typescript): name HOC-wrapped const declarations (forwardRef / memo / useCallback / useMemo / observer) (#1261) 2026-05-03 13:58:09 +01:00
utils ci: add macOS to cross-platform test matrix (#208) 2026-03-07 10:38:32 +00:00