release(crates): v0.49.0

[oxc-bot]

[0.49.0] - 2025-02-10

• bec8fee data_structures: [BREAKING] Rename Stack::last_unchecked_mut method (refactor(data_structures)!: rename Stack::last_unchecked_mut method #8911) (overlookmotel)

• bbb075d ast: [BREAKING] Name AstBuilder enum builders after variant name not type name (refactor(ast)!: name AstBuilder enum builders after variant name not type name #8890) (overlookmotel)

• b7ff7e1 span: [BREAKING] Export ContentEq trait from root of oxc_span crate (refactor(span)!: export ContentEq trait from root of oxc_span crate #8869) (overlookmotel)

Features

• 53ee053 ast: Improve TS type definitions for appended fields (feat(ast): improve TS type definitions for appended fields #8882) (overlookmotel)
• c940826 ast_tools: Get extra params for visitor methods from #[visit(args)] attr (feat(ast_tools): get extra params for visitor methods from #[visit(args)] attr #8887) (overlookmotel)
• 8f0b865 ast_tools: Generate mapping of trait name to crate in oxc_ast_macros (feat(ast_tools): generate mapping of trait name to crate in oxc_ast_macros #8870) (overlookmotel)
• e693ff3 ast_tools: Generate list of helper attributes in oxc_ast_macros crate (feat(ast_tools): generate list of helper attributes in oxc_ast_macros crate #8852) (overlookmotel)
• b4ee617 codegen: Prefer backquotes over double / single quotes (feat(codegen): prefer backquotes over double / single quotes #8839) (sapphi-red)
• 0a74cf5 data_structures: Add first and first_mut methods to stack types (feat(data_structures): add first and first_mut methods to stack types #8908) (overlookmotel)
• ad1a878 ecmascript: Support BigInt comparison (feat(ecmascript): support BigInt comparison #9014) (sapphi-red)
• d515cfd ecmascript: Detect objects without overridden toString/valueOf/Symbol.toPrimitive (feat(ecmascript): detect objects without overridden toString/valueOf/Symbol.toPrimitive #8993) (sapphi-red)
• 2a10a99 ecmascript: Support arrays and objects for unary expression may_have_side_effects (feat(ecmascript): support arrays and objects for unary expression may_have_side_effects #8990) (sapphi-red)
• dd383c0 ecmascript: ValueType::from for PrivateInExpression (feat(ecmascript): ValueType::from for PrivateInExpression #8964) (sapphi-red)
• c3eef2f ecmascript: ValueType::from for parenthesized expressions (feat(ecmascript): ValueType::from for parenthesized expressions #8962) (sapphi-red)
• 2c3a46d ecmascript: Support more simple expressions by ValueType::from (feat(ecmascript): support more simple expressions by ValueType::from #8961) (sapphi-red)
• 4cec83f ecmascript: ValueType::from for bitwise not operator (feat(ecmascript): ValueType::from for bitwise not operator #8955) (sapphi-red)
• e3e9999 ecmascript: Complete may_have_side_effects (feat(ecmascript): complete may_have_side_effects #8855) (sapphi-red)
• cd84a05 minifier: Minimize expression statement !x -> x (feat(minifier): minimize expression statement !x -> x #9012) (Boshen)
• b416334 minifier: Remove useless string addition (feat(minifier): remove useless string addition #9011) (sapphi-red)
• beeb2fb minifier: Implement optimizeImplicitJump (feat(minifier): implement optimizeImplicitJump #8984) (Boshen)
• ce3b744 minifier: Remove name from function / class expressions (feat(minifier): remove name from function / class expressions #8997) (sapphi-red)
• 3f7faed minifier: Remove unused function expression with name by remove_dead_code (feat(minifier): remove unused function expression with name by remove_dead_code #8996) (sapphi-red)
• ec601f2 minifier: Improve mangleFor (feat(minifier): improve mangleFor #8901) (Boshen)
• ca4831b minifier: Fold typeof class {} to 'function' (feat(minifier): fold typeof class {} to 'function' #8949) (sapphi-red)
• 9ffe9e9 minifier: Fold typeof (() => {}) to 'function' (feat(minifier): fold typeof (() => {}) to 'function' #8948) (sapphi-red)
• 36007de minifier: Fold typeof { foo } when foo is declared (feat(minifier): fold typeof { foo } when foo is declared #8947) (sapphi-red)
• 56575b2 minifier: Fold complicated array literals passed to unary + (feat(minifier): fold complicated array literals passed to unary + #8944) (sapphi-red)
• 14462be minifier: Fold simple literals passed to unary + (feat(minifier): fold simple literals passed to unary + #8943) (sapphi-red)
• 4a86467 minifier: Remove unnecessary unary + inside numeric binary operators (feat(minifier): remove unnecessary unary + inside numeric binary operators #8957) (sapphi-red)
• 4b4d543 minifier: Minimize block statements (feat(minifier): minimize block statements #8857) (Boshen)
• d6d13dd minifier: Minimize !!(boolean_expr) -> boolean_expr (feat(minifier): minimize !!(boolean_expr) -> boolean_expr #8849) (Boshen)
• 20f2c46 minifier: for (;;) { var x } -> for (;;) var x; (feat(minifier): for (;;) { var x } -> for (;;) var x; #8847) (Boshen)
• e623745 minifier: Minify String::concat into template literal (feat(minifier): minify String::concat into template literal #8443) (sapphi-red)
• 84b62c7 minifier: Implement minimize for statement (feat(minifier): implement minimize for statement #8846) (Boshen)
• d6daa75 napi/transform: Support for enabling legacy decorator (feat(napi/transform): support for enabling legacy decorator #8927) (Dunqing)
• 951b2d5 npm/runtime: Add @oxc-project/runtime package (feat(npm/runtime): add @oxc-project/runtime package #8595) (Boshen)
• f2d28f3 transformer: Support for transforming legacy decorator (feat(transformer): support for transforming legacy decorator #8614) (Dunqing)

Bug Fixes

• 1daa8fe ast: Estree compat AssignmentTargetPropertyProperty (fix(ast): estree compat AssignmentTargetPropertyProperty #9005) (hi-ogawa)
• e0646d7 ast: Estree compat ArrayAssignmentTarget (fix(ast): estree compat ArrayAssignmentTarget #8998) (hi-ogawa)
• d7802a7 ast: Serialize ArrowFunctionExpression.body: FunctionBody | Expression (fix(ast): serialize ArrowFunctionExpression.body: FunctionBody | Expression #8988) (Hiroshi Ogawa)
• 7e6a537 ast: Include directives in body (fix(ast): include directives in body #8981) (hi-ogawa)
• ec1d593 ast: Add missing estree props for ArrowFunctionExpression (fix(ast): add missing estree props for ArrowFunctionExpression #8980) (camchenry)
• 8eccdec ast: Estree compat CatchClause (fix(ast): estree compat CatchClause #8975) (hi-ogawa)
• 2ee1d6c ast: Estree compat Property (fix(ast): estree compat Property #8974) (hi-ogawa)
• 801d78e ast: Estree compat UnaryExpression (fix(ast): estree compat UnaryExpression #8973) (hi-ogawa)
• a2883b1 ast: Estree compat Function (fix(ast): estree compat Function #8972) (hi-ogawa)
• a520986 ast: Estree compat Program.sourceType (fix(ast): estree compat Program.sourceType #8919) (Hiroshi Ogawa)
• e30cf6a ast: Estree compat MemberExpression (fix(ast): estree compat MemberExpression #8921) (Hiroshi Ogawa)
• 315fec6 ast: Fix lifetimes on custom Serialize impls (fix(ast): fix lifetimes on custom Serialize impls #8899) (overlookmotel)
• 0c55dd6 ast: Serialize Function.params like estree (fix(ast): serialize Function.params like estree #8772) (Hiroshi Ogawa)
• be71b03 codegen: Parenthesis is lacking when a pure comment is placed before a function expression inside a call expression (fix(codegen): parenthesis is lacking when a pure comment is placed before a function expression inside a call expression #8968) (Dunqing)
• 9a5a926 ecmascript: Fix may_have_side_effects for binary expressions (fix(ecmascript): fix may_have_side_effects for binary expressions #8991) (sapphi-red)
• 660c314 ecmascript: Fix may_have_side_effects for unary expressions (fix(ecmascript): fix may_have_side_effects for unary expressions #8989) (sapphi-red)
• 8ab7204 ecmascript: Fix ValueType::from for AssignmentExpression (fix(ecmascript): fix ValueType::from for AssignmentExpression #8959) (sapphi-red)
• aeb122d ecmascript: Fix ValueType::from for numeric binary operators (fix(ecmascript): fix ValueType::from for numeric binary operators #8956) (sapphi-red)
• 1182c20 ecmascript: ValueType::from for unknown value should return Undetermined instead of Number (fix(ecmascript): ValueType::from for unknown value should return Undetermined instead of Number #8954) (sapphi-red)
• f11dff0 mangler, prettier, ast_tools: Remove methods which are unstable in our MSRV (fix(mangler, prettier, ast_tools): remove methods which are unstable in our MSRV #8929) (overlookmotel)
• b5a7785 minifier: Fix comparison of strings with unicode characters (fix(minifier): fix comparison of strings with unicode characters #8942) (sapphi-red)
• 4a723f1 minifier: Should not merge conditional function calls if referencing the function has a side-effect (fix(minifier): should not merge conditional function calls if referencing the function has a side-effect #8922) (sapphi-red)
• 1b89e75 oxc_transformer: Avoid const unwrap in base64 length calc (fix(oxc_transformer): avoid const unwrap in base64 length calc #8914) (碳苯 Carbon)
• 81bed37 span: f64::content_eq return false for 0 and -0 (fix(span): f64::content_eq return false for 0 and -0 #9007) (overlookmotel)
• 2c4f004 transformer/typescript: Typescript parameter properties disappear when there's two or more classes that uses that feature (fix(transformer/typescript): typescript parameter properties disappear when there's two or more classes that uses that feature #8969) (Dunqing)

Performance

• fcfc274 ast: Assume serde_json output is valid UTF8 string (perf(ast): assume serde_json output is valid UTF8 string #8928) (overlookmotel)

Documentation

• 705208b ast: Do not include r# prefix in doc comments for AstBuilder methods (docs(ast): do not include r# prefix in doc comments for AstBuilder methods #8873) (overlookmotel)
• 4cabc16 ast_macros: Update docs (docs(ast_macros): update docs #8853) (overlookmotel)
• f6b6e70 data_structures: Correct doc comments for SparseStack (docs(data_structures): correct doc comments for SparseStack #8907) (overlookmotel)

Refactor

• 0929320 ast: Add NULL value for serializing null types (refactor(ast): add NULL value for serializing null types #8987) (camchenry)
• a1ca2eb ast: Support #[estree(ts_alias)] attr on enums and use it on RegExpPattern and RegExpFlags (refactor(ast): support #[estree(ts_alias)] attr on enums and use it on RegExpPattern and RegExpFlags #8953) (overlookmotel)
• 515eb52 ast: Shorten code for impl Serialize for Elision (refactor(ast): shorten code for impl Serialize for Elision #8940) (overlookmotel)
• 640db88 ast: Introduce #[estree(ts_alias)] attr and use it on Elision (refactor(ast): introduce #[estree(ts_alias)] attr and use it on Elision #8939) (overlookmotel)
• 66f0afb ast: Shorten TS type definitions for enums (refactor(ast): shorten TS type definitions for enums #8938) (overlookmotel)
• a6884e4 ast: Simplify serializing literal types (refactor(ast): simplify serializing literal types #8937) (overlookmotel)
• c58f785 ast: Simplify serializing SourceType (refactor(ast): simplify serializing SourceType #8936) (overlookmotel)
• 647a288 ast: Rename #[estree(add_entry)] to #[estree(add_fields)] (refactor(ast): rename #[estree(add_entry)] to #[estree(add_fields)] #8926) (overlookmotel)
• cbb4e9c ast: Generated Serialize impls flatten struct fields (refactor(ast): generated Serialize impls flatten struct fields #8904) (overlookmotel)
• 5cb8466 ast: Estree via on struct fields implement From (refactor(ast): estree via on struct fields implement From #8898) (overlookmotel)
• 223eb8d ast: Override TS type defs with #[estree(custom_ts_def)] attribute on type (refactor(ast): override TS type defs with #[estree(custom_ts_def)] attribute on type #8897) (overlookmotel)
• a36bc5f ast: Generate Visit methods in order of type definitions (refactor(ast): generate Visit methods in order of type definitions #8891) (overlookmotel)
• 893339d ast: Record plural names in #[plural] attr (refactor(ast): record plural names in #[plural] attr #8889) (overlookmotel)
• 5f5188c ast: Shorten generated code for GetSpan (refactor(ast): shorten generated code for GetSpan #8883) (overlookmotel)
• 571fb70 ast: Derive ContentEq on literal types (refactor(ast): derive ContentEq on literal types #8880) (overlookmotel)
• 04786ac ast: Use = syntax for #[scope] attrs (refactor(ast): use = syntax for #[scope] attrs #8878) (overlookmotel)
• 6628e1d ast: Move #[estree(skip)] to types (refactor(ast): move #[estree(skip)] to types #8877) (overlookmotel)
• 3407d47 ast: Move #[clone_in(default)] to types (refactor(ast): move #[clone_in(default)] to types #8876) (overlookmotel)
• caa651c ast: #[content_eq(skip)] attr (refactor(ast): #[content_eq(skip)] attr #8875) (overlookmotel)
• 7ddd219 ast: Rename #[estree(always_flatten)] attr to #[estree(flatten)] (refactor(ast): rename #[estree(always_flatten)] attr to #[estree(flatten)] #8871) (overlookmotel)
• 6839433 ast: Communicate type of RegExpFlags to oxc_ast_tools with alias type (refactor(ast): communicate type of RegExpFlags to oxc_ast_tools with alias type #8868) (overlookmotel)
• abfe5bf ast: Shorten generated code for numbers (refactor(ast): shorten generated code for numbers #8864) (overlookmotel)
• f6f92db ast: Re-order generated code (refactor(ast): re-order generated code #8863) (overlookmotel)
• f69de07 ast: Remove unneeded lint attrs from generated code (refactor(ast): remove unneeded lint attrs from generated code #8862) (overlookmotel)
• 6d1e1d8 ast: Make generated code consistent (refactor(ast): make generated code consistent #8872) (overlookmotel)
• a5bdf32 ast_tools: Re-vamp oxc_ast_tools (refactor(ast_tools): re-vamp oxc_ast_tools #8844) (overlookmotel)
• 9b5d800 minifier: Move equality comparison to ConstantEvaluation (refactor(minifier): move equality comparison to ConstantEvaluation #9009) (sapphi-red)
• 9193217 minifier: Remove duplicated typeof comparison to non-strict equality compression (refactor(minifier): remove duplicated typeof comparison to non-strict equality compression #9010) (sapphi-red)
• 85b8ea4 minifier: Extract symbols().symbol_is_used(symbol_id) (refactor(minifier): extract symbols().symbol_is_used(symbol_id) #8995) (sapphi-red)
• 9c84c6d minifier: Break up methods into different files (refactor(minifier): break up methods into different files #8843) (Boshen)
• e930cae span: Combine Span type and impls in 1 file (refactor(span): combine Span type and impls in 1 file #8900) (overlookmotel)
• 768ad4f syntax: Add #[ast] attr to semantic ID types (refactor(syntax): add #[ast] attr to semantic ID types #8867) (overlookmotel)

Styling

• a4a8e7d all: Replace #[allow] with #[expect] (style(all): replace #[allow] with #[expect] #8930) (overlookmotel)

Testing

• 4803059 ast: Remove old ast snapshot tests (test(ast): remove old ast snapshot tests #8976) (hi-ogawa)
• 2d06260 data_structures: Add tests for NonEmptyStack::as_slice and as_slice_mut (test(data_structures): add tests for NonEmptyStack::as_slice and as_slice_mut #8912) (overlookmotel)
• e1fd3e8 ecmascript: Add tests for ValueType for undetermined cases (test(ecmascript): add tests for ValueType for undetermined cases #8960) (sapphi-red)
• cc7bb9c ecmascript: Add test for ValueType and update document (test(ecmascript): add test for ValueType and update document #8951) (sapphi-red)
• cebb350 minfier: Clean up some esbuild tests (Boshen)
• 8495c21 minifier: Enable passed tests (Boshen)
• f6d43f5 minifier: Enable esbuild constant evaluation tests (test(minifier): enable esbuild constant evaluation tests #8941) (sapphi-red)

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[github-actions]

Monitor Oxc

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

[codspeed-hq]

CodSpeed Performance Report

Merging #9015 will not alter performance

_{Comparing release/crates-1739200210 (50885b6) with main (f143149)}

Summary

✅ 33 untouched benchmarks