docs(parsing): pin the naming convention for dotted JSX components - #88
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Included review availability: Your plan provides up to 10 included reviews per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe parser documentation defines rightmost-segment naming for dotted callees. A TSX integration test verifies this behavior for uppercase and lowercase JSX member expressions and excludes intrinsic elements and full dotted paths. ChangesJSX reference normalization
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to The PR documents the existing dotted JSX naming behavior and pins it with tests covering component references and intrinsic host elements, including hyphenated tags; no actionable merge-blocking risk remains after normal checks and review. Possibly related PRs
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Inline comments:
In `@crates/vera-core/src/parsing/references.rs`:
- Around line 20-23: Update the documentation paragraph near is_jsx_host_element
to state that intrinsic host elements require a bare lowercase identifier
without hyphens, while preserving the explanation that lowercase member
expressions are value lookups.
In `@crates/vera-core/src/parsing/tests.rs`:
- Around line 441-457: Strengthen the reference assertions in the affected
parsing test by asserting that the complete callee set contains only the
expected references, Arrow and Chevron, with no additional root segments such as
Icons or icons. Preserve the existing checks excluding dotted paths and
intrinsic host elements.
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Both findings valid, fixed in f0d46b6. cubic and CodeRabbit caught the same doc gap independently. The hyphen rule was missing from the documentation. The paragraph said only a bare lowercase identifier is an intrinsic host element, which is half of what The paragraph now states both intrinsic forms for bare tags, and keeps them separate from the member-expression case, where the intrinsic test never applies at all. The test used The fixture also gained 773 vera-core tests pass, |
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Correct, and thank you for catching it. Fixed in 9633997. The fixture did not contain The tag is in the fixture now, and the assertion demonstrably depends on it. Removing So a hyphenated tag leaking into the call graph now fails the test rather than being described in prose. Worth noting this is the second time in this PR that the gap was between what the test claimed and what it checked, which is what the exact-set change was supposed to fix in the first place. Verifying by breaking the production rule, rather than by reading the test, is what caught it both times. 773 |
VeraTools#76 asked for the convention to be decided, documented and tested rather than left implicit. Keeping the current behaviour — a callee is stored under its rightmost segment, so `<Icons.Arrow />` records `Arrow`. The reason is linkage, not convenience. Definitions are indexed under their bare declared name: a component reached as `Icons.Arrow` is declared somewhere as `export function Arrow`, and `find_callers` matches the callee against that name. Storing `Icons.Arrow` would leave the reference matching no definition, reintroducing exactly the invisibility that indexing JSX call sites was added to fix. It also keeps JSX consistent with every other member call, where `obj.method()` already records `method`. A lowercase root does not change it: `<icons.Arrow />` is a member expression, and a member expression is always a value lookup — only a bare lowercase identifier is an intrinsic host element. That matches TypeScript, where the intrinsic test only applies to identifiers, never to property accesses. The trade-off is documented rather than hidden: two components sharing a final segment collapse onto one name, and separating them needs import and module resolution this layer does not do. The test pins all of it, including that no callee carries a dotted path and that intrinsic host elements stay out of the call graph.
The new paragraph said only a bare lowercase identifier is intrinsic, which omits the other half of the rule `is_jsx_host_element` implements: any bare name containing a hyphen is intrinsic whatever its case, because that is the custom-element form. Documenting one condition and not the other would have implied every non-dotted capitalized tag is a component. The test asserted with `contains`, so a root segment leaking in as its own reference — `Icons` or `icons` — would have passed unnoticed, which is the failure mode most worth catching here. It now asserts the exact set, and the fixture includes `<My-element />` so the hyphen rule is covered rather than just described.
f0d46b6 claimed the fixture covered the hyphen rule and it did not. The edit that was supposed to add `<My-element />` never reached the file, so the comment and that commit message both described coverage that was absent, while the exact-set assertion passed for an unrelated reason. The tag is in the fixture now, and the assertion is what proves the rule: removing `|| text.contains('-')` from `is_jsx_host_element` makes the test fail with left: ["Arrow", "Chevron", "My-element"] right: ["Arrow", "Chevron"] so a hyphenated tag leaking into the call graph is caught rather than merely asserted in prose.
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Verified
Both observations in the issue are accurate.
extract_calleereturns the rightmost identifier, so<Icons.Arrow />recordsArrow. Andis_jsx_host_elementreturns early for amember_expression, so<icons.Arrow />with a lowercase root is kept as a component and also recorded asArrow.The issue asks for a decision, documentation and a pinning test rather than reporting a defect. This keeps the current behaviour, and writes down why.
The decision: rightmost segment
The deciding argument is linkage, not developer grep habits.
Definitions are indexed under their bare declared name. A component reached as
Icons.Arrowis declared somewhere asexport function Arrow, andfind_callersmatcheslower(callee)against that name. Storing the full member path would leave the reference matching no definition — reintroducing precisely the invisibility that indexing JSX call sites was added to fix in #58.It also keeps JSX consistent with the rest of the extractor, where
obj.method()already recordsmethod. Special-casing JSX to store dotted paths would makevera referencesbehave differently depending on whether the call site happened to be JSX.Verified end-to-end on a real index:
Lowercase roots
<icons.Arrow />staying a component is correct rather than an oversight. TypeScript's intrinsic test applies only to identifiers — a property access is never intrinsic, whatever the case of its root. So a dotted tag is always a value lookup, and treatingicons.Arrowas an HTML tag would drop a real reference.The trade-off, stated rather than hidden
Two components sharing a final segment (
Icons.ArrowandShapes.Arrow) collapse onto one name. Separating them needs import and module resolution, which this layer does not do — it reads one file at a time with no cross-file symbol table. That limitation is now in the module documentation rather than being something a reader has to infer from the code.Test
jsx_dotted_components_index_under_the_rightmost_segmentpins all four properties: the uppercase-rooted dotted component indexes as its rightmost segment, the lowercase-rooted one does too, no callee carries a dotted path, and intrinsic host elements (div,span) stay out of the call graph. If someone later switches to full member paths, that test is where the decision gets re-opened deliberately instead of silently.773
vera-coretests,cargo fmt --checkclean, clippy unchanged.Fixes #76
Summary by cubic
Pins and documents the naming convention for dotted JSX components in
vera-coreparsing to preserve reference → definition links. Behavior is unchanged: we index the rightmost segment (e.g.,<Icons.Arrow />→Arrow), consistent withobj.method().references.rsthat dotted JSX tags index by their rightmost segment; member expressions with lowercase roots remain components; bare host elements are excluded by the lowercase or hyphen rule (e.g.,div,my-element,My-element).jsx_dotted_components_index_under_the_rightmost_segmentasserting the exact callee set (Arrow,Chevron), including<My-element />to cover the hyphen rule; ensures no dotted paths or host elements leak into references.Written for commit bff96b3. Summary will update on new commits.
Summary by CodeRabbit
Documentation
Tests