fix(semantic): allow var and function with same name in static blocks#18358
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Pull request overview
This pull request fixes semantic analysis to allow var and function declarations with the same name within class static blocks, treating static blocks as var-hoisting boundaries similar to function scopes.
Changes:
- Added
is_class_static_block()check to allow var/function name coexistence in static blocks - Fixed Babel conformance test
es2022/class-static-block/duplicate-function-var-name
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Copilot reviewed 1 out of 3 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| crates/oxc_semantic/src/checker/javascript.rs | Added check for is_class_static_block() in check_function_redeclaration to allow var/function redeclarations in static blocks |
| tasks/coverage/snapshots/semantic_babel.snap | Removed error entry for duplicate-function-var-name test, showing it now passes |
| tasks/coverage/snapshots/parser_babel.snap | Removed parsing error for duplicate-function-var-name test, showing improved test pass rate |
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…ocks (#18358) ## Summary - Static blocks are var-hoisting boundaries (like functions), so `var x; function x() {}` should be allowed within them - Added `is_class_static_block()` check to `check_function_redeclaration` to allow this coexistence Fixes the Babel conformance test: `es2022/class-static-block/duplicate-function-var-name` ## Test plan - [x] `cargo coverage -- parser` passes - [x] The test case now parses without error 🤖 Generated with [Claude Code](https://claude.com/claude-code)
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### 💥 BREAKING CHANGES - 22dec6a semantic: [**BREAKING**] Remove `Scoping::scope_build_child_ids` and all related APIs (#18362) (Dunqing) - 30a4899 oxc: [**BREAKING**] Remove `CompilerInterface::semantic_child_scope_ids` (#18361) (Dunqing) - 777fc40 ast: [**BREAKING**] Add `Ident` type (#18354) (Boshen) - af0ca46 span: [**BREAKING**] Use `ModuleKind::CommonJS` for `SourceType::cjs()` (#18276) (sapphi-red) ### 🚀 Features - 0a02026 semantic: Add TS1499 code to diagnostic (#18557) (camc314) - 8b4618f parser: Add TS1500 code to diagnostic (#18547) (camc314) - 866b6b3 parser: Add TS1048 code to diagnostic (#18546) (camc314) - 1117c44 parser: Add TS1054 code to diagnostic (#18541) (camc314) - e4fcdde semantic: Add TS1053 code to diagnostic (#18539) (camc314) - bcbf396 semantic: Add TS1052 code to diagnostic (#18538) (camc314) - 8155edf semantic: Add TS1049 code to diagnostic (#18535) (camc314) - 51d3b3f parser: Add TS1502 code to diagnostic (#18534) (camc314) - 00854e8 semantic: Add TS2337 error code to super call diagnostic (#18531) (camc314) - 993fd2b parser: Parse unambiguous await with better error messages (#18480) (Boshen) - 8db0e78 linter/plugins: Handle BOMs (#18376) (overlookmotel) - 6ac09e2 linter/plugins: Support source text not being at start of buffer (#18375) (overlookmotel) - 2ef5647 ast: Add escape_raw parameter to template_element builders (#18121) (Boshen) ### 🐛 Bug Fixes - 74d0998 semantic: Update error msg for multiple `default` cases in switch stmt (#18526) (camc314) - c205b0d ast: Remove `ThisExpression` from `TSModuleReference` (#18489) (Boshen) - aed3669 parser: Parse HTML-like comments in unambiguous mode (#18442) (Boshen) - c4132fb parser: Validate accessor parameters in interface method signatures (#18391) (Boshen) - b0cd74d semantic: Allow `var` and `function` with same name in static blocks (#18358) (Boshen) - 6037995 semantic: Allow `new.target` in class field initializers (#18349) (Boshen) - 9a15c6a semantic: Do not rely on spans for node comparison in `Function::bind` (#18296) (overlookmotel) ### ⚡ Performance - 6b600c4 semantic: Skip parent lookup for function declarations in `Function::bind` (#18293) (overlookmotel) - c27ad2d semantic: Move check for function declaration out of `is_function_part_of_if_statement` (#18292) (overlookmotel) - 63eb89e semantic: Skip checking redeclarations for function expressions (#18291) (overlookmotel) - 7c12743 semantic: Skip checking unresolved exports in CommonJS files (#18250) (overlookmotel) - 2349031 allocator: Increase initial chunk size from 512B to 16KB (#18234) (Boshen) ### 📚 Documentation - 8ccd853 npm: Update package homepage URLs and add keywords (#18509) (Boshen) - 9b3165f napi/parser: Clarify when to use `parseAsync` vs `parseSync` (#18486) (Boshen) - 1b59f63 napi/parser: Correct typo in README (#18251) (overlookmotel) - 00ff75f mangler: Fix `top_level` option in example (#18233) (overlookmotel) - 2ddc073 semantic: Fix typo in comment (#18238) (overlookmotel) Co-authored-by: Boshen <[email protected]>
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Summary
var x; function x() {}should be allowed within themis_class_static_block()check tocheck_function_redeclarationto allow this coexistenceFixes the Babel conformance test:
es2022/class-static-block/duplicate-function-var-nameTest plan
cargo coverage -- parserpasses🤖 Generated with Claude Code