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oxc-guard
0389c4010e
### 🚀 Features -83cb516minifier: Improve negation of expressions in boolean context (#25755) (Armano) ### 🐛 Bug Fixes -134fb22isolated-declarations: Preserve unresolved parameter types (#25909) (Dunqing) -526c2b3codegen: Remove deprecated test APIs (#25889) (camc314) -344a9b2codegen: Align enum template sourcemaps (#25872) (camc314) ### ⚡ Performance -5ef0c93minifier: Unwrap all unary exprs without creating dummy expressions (#25891) (Armano) -8783524packages/codegen: Remove loop from `growMappingBuffer` (#25886) (overlookmotel) -b6b14c0packages/codegen: Remove redundant branch (#25885) (overlookmotel) -be6adf0packages/sourcemap: Make `location` passed to `recordSourceMapping` always a number (#25884) (overlookmotel) -f720f15packages/codegen: Take named-mapping only code off hot path in `recordSourceMapping` (#25883) (overlookmotel) -a734af5packages/codegen: Remove redundant setting of `last` in `printImportAttributes` and `printIf` (#25882) (overlookmotel) -c6e44c6packages/codegen: Combine 2 writes in `printJSXElement` (#25881) (overlookmotel) -8801662packages/codegen: Remove redundant mapping from `printParams` (#25880) (overlookmotel) ### 📚 Documentation -5ad330epackages/codegen: Reformat comments (#25876) (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.