release(crates): v0.42.0

[oxc-bot]

[0.42.0] - 2024-12-18

• 84b75a0 semantic: [BREAKING] Remove ScopeFlags::Modifiers (refactor(semantic): remove ScopeFlags::Modifiers #7935) (overlookmotel)

• c071494 semantic: [BREAKING] Remove SymbolTable::rename method (refactor(semantic)!: remove SymbolTable::rename method #7868) (overlookmotel)

Features

• 8b7c5ae ast: Add AstBuilder::atom_from_cow (feat(ast): add AstBuilder::atom_from_cow #7974) (overlookmotel)
• 46e2e27 data_structures: Implement Default for NonEmptyStack (feat(data_structures): implement Default for NonEmptyStack #7946) (overlookmotel)
• db9e93b mangler: Mangle top level variables (feat(mangler): mangle top level variables #7907) (翠 / green)
• 075bd16 minifier: Fold bitwise operation (feat(minifier): fold bitwise operation #7908) (翠 / green)
• c16a851 napi/transform: Add jsx: 'preserve' option (feat(napi/transform): add jsx: 'preserve' option #7965) (Boshen)
• 81eedb1 parser: 'readonly' type modifier is only permitted on array and tuple literal types. (feat(parser): 'readonly' type modifier is only permitted on array and tuple literal types. #7880) (Boshen)
• b9322c6 semantic: Re-export all flags and ID types (feat(semantic): re-export all flags and ID types #7886) (overlookmotel)
• c30a982 span: Add impl From<ArenaString> for Atom (feat(span): add impl From<ArenaString> for Atom #7973) (overlookmotel)
• 02b653c transformer/class-properties: Do not create temp var for template literal computed key (feat(transformer/class-properties): do not create temp var for template literal computed key #7919) (overlookmotel)
• feac02e transformer/class-properties: Only rename symbols if necessary (feat(transformer/class-properties): only rename symbols if necessary #7896) (overlookmotel)
• 6bc530d transformer/class-properties: Transform super call expression that is inside static prop initializer (feat(transformer/class-properties): transform super call expression that is inside static prop initializer #7831) (Dunqing)
• 53e2bc0 traverse: Add TraverseScoping::rename_symbol method (feat(traverse): add TraverseScoping::rename_symbol method #7871) (overlookmotel)

Bug Fixes

• 3659e6d cfg: Include export default code in CFG instructions (fix(cfg): include export default code in CFG instructions #7862) (Jan Olaf Martin)
• 850dd43 codegen: Missing , when generating type parameters with jsx (fix(codegen): missing , when generating type parameters with jsx #7929) (Dunqing)
• 4799471 minfier: Bigint bitwise operation only works with bigint (fix(minfier): bigint bitwise operation only works with bigint #7937) (Boshen)
• de8a86e minifier: Incorrect minification in try_fold_left_child_op (fix(minifier): incorrect minification in try_fold_left_child_op #7949) (翠 / green)
• 9a30910 oxc_transformer: Inject_global_variables should considering string imported name (fix(oxc_transformer): inject_global_variables should considering string imported name #7768) (IWANABETHATGUY)
• 111dc52 parser: Include export token in spans of TSNamespaceExportDeclaration (fix(parser): include export token in spans of TSNamespaceExportDeclaration #7963) (branchseer)
• 14c51ff semantic: Remove inherting ScopeFlags::Modifier from parent scope (fix(semantic): remove inherting ScopeFlags::Modifiers from parent scope #7932) (Dunqing)
• 596aead semantic: Reset references flags when resolved (fix(semantic): reset references flags when resolved #7923) (Dunqing)
• 4924073 semantic: ScopeTree::rename_binding preserve order of bindings (fix(semantic): ScopeTree::rename_binding preserve order of bindings #7870) (overlookmotel)
• bb38065 transformer/class-properties: Do not transform super.prop in nested method within static prop initializer (fix(transformer/class-properties): do not transform super.prop in nested method within static prop initializer #7978) (overlookmotel)
• e76fbb0 transformer/class-properties: Fix symbol clashes in instance prop initializers (fix(transformer/class-properties): fix symbol clashes in instance prop initializers #7872) (overlookmotel)
• c0576fa transformer/class-properties: Use UID for args in created class constructor (fix(transformer/class-properties): use UID for args in created class constructor #7866) (overlookmotel)
• d660d8d transformer/optional-chaining: Do not create unused reference when noDocumentAll assumption (fix(transformer/optional-chaining): do not create unused reference when noDocumentAll assumption #7847) (overlookmotel)
• 4920c6a transformer/optional-chaining: Avoid creating a useless reference when noDocumentAll is true (fix(transformer/optional-chaining): avoid creating a useless reference when noDocumentAll is true #7832) (Dunqing)

Performance

• a5f04a7 ast: Faster Comment::is_jsdoc (perf(ast): faster Comment::is_jsdoc #7905) (overlookmotel)
• 4b24335 codegen: Improve printing of statement comments (perf(codegen): improve printing of statement comments #7857) (Boshen)
• 71a40a2 codegen: Guard comment printing comments when there are no comments (perf(codegen): guard comment printing comments when there are no comments #7856) (Boshen)
• b31f123 transformer/class-properties: Do not re-generate same method key (perf(transformer/class-properties): do not re-generate same method key #7915) (overlookmotel)
• 8ca8fce transformer/class-properties: Reduce work updating scopes when transforming static prop initializers (perf(transformer/class-properties): reduce work updating scopes when transforming static prop initializers #7904) (overlookmotel)
• 80d0b3e transformer/class-properties: Fast path for instance prop initializer scope re-parenting (perf(transformer/class-properties): fast path for instance prop initializer scope re-parenting #7901) (overlookmotel)
• 38aafa2 transformer/class-properties: Reduce size of transform_call_expression_for_super_member_expr (perf(transformer/class-properties): reduce size of transform_call_expression_for_super_member_expr #7859) (overlookmotel)

Documentation

• e49de81 ast: Document Expression::is_* methods (docs(ast): document Expression::is_* methods #7853) (overlookmotel)
• 10a86b9 transformer: Fix comments (docs(transformer): fix comments #7925) (overlookmotel)
• f4cb5d3 transformer: Clarify comment (docs(transformer): clarify comment #7918) (overlookmotel)
• 41a1456 transformer/class-properties: Correct doc comments (docs(transformer/class-properties): correct doc comments #7966) (overlookmotel)
• 18441af transformer/class-properties: Remove oudated todo for assignment expression (docs(transformer/class-properties): remove oudated todo for assignment expression #7955) (Dunqing)
• 1317c00 transformer/class-properties: Clarify doc comments (docs(transformer/class-properties): clarify doc comments #7914) (overlookmotel)
• 9989b58 transformer/class-properties: Re-order file list in doc comment (docs(transformer/class-properties): re-order file list in doc comment #7911) (overlookmotel)
• 7390048 transformer/class-properties: Reformat doc comment (docs(transformer/class-properties): reformat doc comment #7909) (overlookmotel)

Refactor

• beb982a ast: Use exhaustive match for Argument to ArrayExpressionElement conversion (refactor(ast): use exhaustive match for Argument to ArrayExpressionElement conversion #7848) (overlookmotel)
• 3858221 global: Sort imports (refactor(global): sort imports #7883) (overlookmotel)
• 1314c97 minifier: Expose dce as an API instead of an option (refactor(minifier): expose dce as an API instead of an option #7957) (Boshen)
• 6551dfe semantic: Pass &str instead of Cow (refactor(semantic): pass &str instead of Cow #7972) (overlookmotel)
• b8d2bd2 semantic: Move determining references flags for export specifier to visit_export_named_declaration (refactor(semantic): move determining references flags for export specifier to visit_export_named_declaration #7924) (Dunqing)
• 98d7946 semantic: Import flags and ID types from oxc_syntax (refactor(semantic): import flags and ID types from oxc_syntax #7887) (overlookmotel)
• 1cf8f8f semantic: SymbolTable::set_name return old name (refactor(semantic): SymbolTable::set_name return old name #7869) (overlookmotel)
• 5d42df8 semantic: Use Expression::is_super (refactor(semantic): use Expression::is_super #7851) (overlookmotel)
• 8cf9766 semantic, syntax, wasm: Remove #![allow(non_snake_case)] (refactor(semantic, syntax, wasm): remove #![allow(non_snake_case)] #7863) (overlookmotel)
• d59bbae transformer: Remove unneeded lint #[allow] (refactor(transformer): remove unneeded lint #[allow] #7971) (overlookmotel)
• 2c94236 transformer: Improve encapsulation of transforms (refactor(transformer): improve encapsulation of transforms #7888) (overlookmotel)
• 34091b2 transformer: Use Expression::is_super (refactor(transformer): use Expression::is_super #7852) (overlookmotel)
• d4d7bc0 transformer/async-to-generator: Avoid allocating unnecessary Atoms (refactor(transformer/async-to-generator): avoid allocating unnecessary Atoms #7975) (overlookmotel)
• 2e5ffd3 transformer/class-properties: Store temp_var_is_created on ClassBindings (refactor(transformer/class-properties): store temp_var_is_created on ClassBindings #7981) (overlookmotel)
• 27cc6da transformer/class-properties: Store is_declaration only on ClassDetails (refactor(transformer/class-properties): store is_declaration only on ClassDetails #7980) (overlookmotel)
• ee282f8 transformer/class-properties: Remove move_expressions (refactor(transformer/class-properties): remove move_expressions #7979) (overlookmotel)
• 94b376a transformer/class-properties: Simplify logic for when to create temp binding (refactor(transformer/class-properties): simplify logic for when to create temp binding #7977) (overlookmotel)
• ff9d1b3 transformer/class-properties: Comments about shorter output (refactor(transformer/class-properties): comments about shorter output #7976) (overlookmotel)
• 6fc40f0 transformer/class-properties: Pass BoundIdentifiers by reference (refactor(transformer/class-properties): pass BoundIdentifiers by reference #7968) (overlookmotel)
• 69eeeea transformer/class-properties: Methods take &self where possible (refactor(transformer/class-properties): methods take &self where possible #7967) (overlookmotel)
• 98340bb transformer/class-properties: Use stack of ClassDetails (refactor(transformer/class-properties): use stack of ClassDetails #7947) (overlookmotel)
• 088dd48 transformer/class-properties: Shorten code (refactor(transformer/class-properties): shorten code #7913) (overlookmotel)
• 544ffbf transformer/class-properties: Split up code into multiple files (refactor(transformer/class-properties): split up code into multiple files #7912) (overlookmotel)
• dcaf674 transformer/class-properties: Rename file (refactor(transformer/class-properties): rename file #7910) (overlookmotel)
• 6243980 transformer/class-properties: Instance prop inits visitor use Visit (refactor(transformer/class-properties): instance prop inits visitor use Visit #7867) (overlookmotel)
• eb47d43 transformer/class-properties: Re-use existing Vec (refactor(transformer/class-properties): re-use existing Vec #7854) (overlookmotel)
• 1380b7b transformer/class-properties: Reduce visibility of method (refactor(transformer/class-properties): reduce visibility of method #7858) (overlookmotel)
• 0f5e078 transformer/class-properties: Rename *_owner to owned_* (refactor(transformer/class-properties): rename *_owner to owned_* #7855) (Dunqing)
• 4ea90d4 transformer/react-refresh: Calculate signature key once (refactor(transformer/react-refresh): calculate signature key once #7970) (Dunqing)
• 15b9bff transformer/typescript: Reuse Atom (refactor(transformer/typescript): reuse Atom #7969) (overlookmotel)

Styling

• fb897f6 data_structures: Add line break (style(data_structures): add line break #7882) (overlookmotel)
• 7fb9d47 rust: cargo +nightly fmt (style(rust): cargo +nightly fmt #7877) (Boshen)

Testing

• 523d48c transformer: Move named test to exports folder (test(transformer): move named test to exports folder #7922) (Dunqing)
• e766051 transformer: Skip test which uses filesystem under miri (test(transformer): skip test which uses filesystem under miri #7874) (overlookmotel)
• f39e65e transformer: Prevent lint error when running miri (test(transformer): prevent lint error when running miri #7873) (overlookmotel)

[graphite-app]

How to use the Graphite Merge Queue

Add either label to this PR to merge it via the merge queue:

• 0-merge - adds this PR to the back of the merge queue
• hotfix - for urgent hot fixes, skip the queue and merge this PR next

You must have a Graphite account in order to use the merge queue. Sign up using this link.

An organization admin has enabled the Graphite Merge Queue in this repository.

Please do not merge from GitHub as this will restart CI on PRs being processed by the merge queue.

[github-actions]

Monitor Oxc

suite	result
Isolated Declarations	✅
(codegen)	✅
(compressor)	✅
(dce)	❌
(transformer)	✅
(mangler)	✅
(whitespace)	✅

[codspeed-hq]

CodSpeed Performance Report

Merging #7983 will not alter performance

_{Comparing release/crates-1734493166 (f23bdf9) with main (2e5ffd3)}

Summary

✅ 29 untouched benchmarks