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oxc-guard
b6f1458dec
### 💥 BREAKING CHANGES -a33788east: [**BREAKING**] Group class heritage into `ClassHeritage` (#25360) (camc314) -5c5cdcdast: [**BREAKING**] Narrow `TSInterfaceHeritage::expression` to TSTypeName (#24360) (camc314) -6be314fast: [**BREAKING**] Remove duplicated `VariableDeclarator::kind` (#25319) (camc314) -44fd320ast: [**BREAKING**] Split TS external modules & Namespace Declarations (#25284) (camc314) ### 🚀 Features -9a37c41napi: Restructure React transform options (#25326) (Boshen) -b3c1b30allocator: Add `ArenaVec::push_mut` (#25338) (overlookmotel) ### 🐛 Bug Fixes -bbd6ed3codegen: Wrap string literal in parens after directives (#25435) (overlookmotel) -d07a293codegen: Preserve cast parentheses in conditional tests (#25115) (camc314) -8b7d441codegen: Preserve satisfies parentheses before bitwise operators (#25113) (camc314) -e0fb2d7minifier: Avoid unsafe return removal in labeled blocks (#25406) (Armano) -c49f4ceparser: Preserve terminal license comments (#25400) (camc314) -9d19ab3transform_react: Downgrade nonfatal compiler diagnostics (#25418) (Boshen) -937825creact_compiler: Disable exhaustive memo validation by default (#25417) (Boshen) -12937b3parser: Reject comma expressions in class fields (#25385) (Cameron) -7d8a9b5react_compiler: Preserve hook spans for React Refresh (#25393) (Boshen) -9e93ba6parser: Reset auto-accessor initializer context (#25384) (camc314) -cc2e28dparser: Reject trailing tokens in `Parser::parse_expression` (#25371) (camc314) -697c629minifier: Preserve Annex B labeled-function bindings in implicit-return rewrite (#25349) (Armano) -4d723caparser: Report TS1035 for quoted module names (#25305) (camc314) -0c9b980semantic: Report module declaration diagnostics (#25285) (camc314) -2a1058anapi: Omit parser header from WASI declarations (#25254) (camc314) ### ⚡ Performance -dd1430bsemantic: Avoid allocation in class overload check (#25440) (camc314) -e420816parser: Optimize trailing comma tracking (#25376) (camc314) -6529d1aminifier: Short-circuit scope check when alternate already determines result (#25318) (Armano) ### 📚 Documentation -fe111eballocator: Improve doc comments for `Arena` methods (#24922) (overlookmotel)
Oxc AST Macros
Procedural macros for generating AST-related code and ensuring memory layout consistency.
Overview
This crate provides procedural macros that generate boilerplate code for AST nodes, ensuring consistent memory layout and providing derived traits automatically.
Key Features
#[ast]attribute: Marks types as AST nodes and generates required traits- Memory layout control: Ensures
#[repr(C)]for predictable memory layout - Trait derivation: Automatically derives common traits like
Debug,Clone, etc. - Code generation: Reduces boilerplate and ensures consistency across AST types
What the #[ast] Macro Does
- Adds
#[repr(C)]: Ensures predictable memory layout across platforms - Marker for tooling: Identifies types as AST nodes for code generation tools
- Trait derivation: Automatically implements common traits
- Consistency: Ensures all AST nodes follow the same patterns
Architecture
This macro system enables:
- Maintainable AST: Reduces boilerplate across hundreds of AST types
- Consistent layout: Critical for performance and correctness
- Tool integration: Allows
oxc_ast_toolsto generate visitor code - Type safety: Ensures all AST nodes have required traits
The macros are designed to be transparent and generate minimal, efficient code.