fix(unplugin-typegpu): Transform preserves exports#2606
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Pull request overview
This PR fixes the Babel-based unplugin-typegpu transform so that when a "use gpu" exported function declaration is hoisted/replaced, the corresponding export is preserved (instead of being accidentally removed). It also updates the test suite to assert the corrected Babel output alongside the Rollup output.
Changes:
- Preserve
exportstatements when hoisting transformedexport function .../export default function ...in the Babel plugin. - Extend the existing “hoists exported…” test to cover both Babel and Rollup transforms with separate snapshots.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| packages/unplugin-typegpu/src/babel.ts | When hoisting a transformed exported function declaration, replaces the enclosing export node with an equivalent export (export { id } / export default id) instead of removing it. |
| packages/unplugin-typegpu/test/use-gpu-directive.test.ts | Splits the exported-hoisting test into babel and rollup assertions and adds an inline snapshot verifying Babel now preserves exports. |
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cieplypolar
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✅ No new issues found.
Reviewed changes — fixes the Babel transform of unplugin-typegpu to preserve export declarations when hoisting "use gpu" function declarations, and mirrors the support in the unplugin/rollup code path. Comprehensive tests added for both babel and rollup across named exports, default exports, arrow functions, and anonymous default exports.
- Preserve named exports in Babel transform —
babel.ts: after hoisting, replacesexport functionwithexport { name }andexport default functionwithexport default nameinstead of.remove(). - Mirror default export in unplugin/rollup transform —
factory.ts: adds theExportDefaultDeclarationbranch, appendingexport default <name>;after the hoistedconstfor named default-exported functions. - Expand test coverage — 5 new
describeblocks in the test file, each with parallel babel and rollup inline snapshots, covering named, default, arrow, anonymous default function, and anonymous default arrow function export patterns.
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iwoplaza
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Jun 18, 2026
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Thanks for the fixes! If there's a way to reassociate the comments with the function definitions, then that would be great
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✅ No new issues found.
Reviewed changes — added JSDoc comment inheritance in the Babel transform so that leading comments on export function / export default function declarations are preserved on the hoisted const output, directly addressing the reviewer's request about comment reassociation.
- Inherit export-level comments in Babel transform —
babel.ts: when the parent of a hoisted function declaration is an export,t.inheritLeadingCommentscopies comments from the parent export node onto theconstdeclaration, then clears the export node's comments to prevent duplication. - Update inline snapshots — test file snapshots now include
/** MUL */and/** ADD */comments positioned before their respectiveconstdeclarations in the Babel output.
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