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refactor(javascript): type the syntax printer's nodes, walkers and compressor - #22725
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…mpressor Replace EXPECTED_ANY in lib/javascript/syntax-printer.js (434 -> 78) with precise types: terser's node fields, walkers, compressor, output stream, ESTree conversion, source maps and the minify driver. New types are @internal, so types.d.ts keeps main's public signatures.
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📝 Walkthrough
Priority: ⬇️ Low Change: Refactor Merge Risk: 🔵 Low · up to
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| Check name | Status | Explanation | Resolution |
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| Title check |  |
The title uses valid Conventional Commit form with the allowed type refactor and clearly describes the type-refinement changes. The branch prefix is not provided, so the required prefix match cannot… |
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Check name Status Explanation Description Check Check skipped - CodeRabbit’s high-level summary is enabled. Linked Issues check Check skipped because no linked issues were found for this pull request. Out of Scope Changes check Check skipped because no linked issues were found for this pull request.
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Explanation
The title uses valid Conventional Commit form with the allowed type
refactorand clearly describes the type-refinement changes. The branch prefix is not provided, so the required prefix match cannot be verified.Resolution
Provide the branch name or confirm that its prefix is
refactor. If it matches, the title passes this check.
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🔧 ast-grep (0.45.3)
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test/unitCases/syntax-printer.unittest.js
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ast-grep timed out on this file
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Types CoverageCoverage after merging refactor/syntax-printer-types into main will be
Coverage Report |
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #22725 +/- ##
========================================
Coverage 96.45% 96.45%
========================================
Files 776 776
Lines 135521 135670 +149
Branches 45645 45733 +88
========================================
+ Hits 130711 130856 +145
- Misses 4810 4814 +4
Flags with carried forward coverage won't be shown. Click here to find out more. ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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Generated code sizeComparing base (
Read No asset changed size. No runtime gained or lost a runtime module. Built |
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Actionable comments posted: 1
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Inline comments:
Review comments at @test/unitCases/syntax-printer.unittest.js:
- Line 5870: Update the JSDoc type for node passed to modules.ast.walk’s
callback so it remains a node shape while its property member accepts either a
string or a NodeShape; do not make the callback parameter itself a union with
string.
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📒 Files selected for processing: 4
lib/javascript/ScopeAnalyzer.jslib/javascript/syntax-printer.jstest/helpers/terserSources.jstest/unitCases/syntax-printer.unittest.js
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Summary
Follow-up to #22719, which did the same for the parser: precise types in
lib/javascript/syntax-printer.js, so the coming rewrite has the type checker to catch mistakes.EXPECTED_ANYinsyntax-printer.jsWhat's left: 39 values terser's
evaluatecomputes or reads off built-ins (can be anything), 28 in public typedefs kept as onmain, 11 caller option bags passed through.New types (nodes, walkers, compressor, output stream, ESTree conversion, source maps, the minify driver) are
@internal, sotypes.d.tsis unchanged. Runtime is unchanged: only JSDoc and casts; ~25 single-statement bodies gained braces where a cast wrapped the line. Casts throughunknown(64 vs 56 onmain) are left for a separate pass acrosslib/.What kind of change does this PR introduce?
refactor
Did you add tests for your changes?
No, types only; existing printer, minifier and scope-analyzer tests pass, and
lint:typeschecks the new types.Does this PR introduce a breaking change?
No;
types.d.tsis identical tomain.If relevant, what needs to be documented once your changes are merged or what have you already documented?
n/a
Use of AI
Claude Code wrote the types and ran lint and tests; I directed the approach (ESTree-aligned, internal-only types) and reviewed the result.
🤖 Generated with Claude Code
https://claude.ai/code/session_01HArJAXZagrHVVNLZZk9soh
Generated by Claude Code
Summary by CodeRabbit