mirror of https://github.com/oxc-project/oxc.git synced 2026-09-14 19:36:11 +08:00

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oxc-guard 0389c4010e release(crates): oxc v0.146.0 (#25912 )

### 🚀 Features

- 83cb516 minifier: Improve negation of expressions in boolean context (#25755) (Armano)

### 🐛 Bug Fixes

- 134fb22 isolated-declarations: Preserve unresolved parameter types (#25909) (Dunqing)
- 526c2b3 codegen: Remove deprecated test APIs (#25889) (camc314)
- 344a9b2 codegen: Align enum template sourcemaps (#25872) (camc314)

### ⚡ Performance

- 5ef0c93 minifier: Unwrap all unary exprs without creating dummy expressions (#25891) (Armano)
- 8783524 packages/codegen: Remove loop from `growMappingBuffer` (#25886) (overlookmotel)
- b6b14c0 packages/codegen: Remove redundant branch (#25885) (overlookmotel)
- be6adf0 packages/sourcemap: Make `location` passed to `recordSourceMapping` always a number (#25884) (overlookmotel)
- f720f15 packages/codegen: Take named-mapping only code off hot path in `recordSourceMapping` (#25883) (overlookmotel)
- a734af5 packages/codegen: Remove redundant setting of `last` in `printImportAttributes` and `printIf` (#25882) (overlookmotel)
- c6e44c6 packages/codegen: Combine 2 writes in `printJSXElement` (#25881) (overlookmotel)
- 8801662 packages/codegen: Remove redundant mapping from `printParams` (#25880) (overlookmotel)

### 📚 Documentation

- 5ad330e packages/codegen: Reformat comments (#25876) (overlookmotel)

2026-08-19 08:29:51 +00:00

src

feat(ast)!: group class heritage into ClassHeritage (#25360 )

2026-08-07 14:18:59 +00:00

Cargo.toml

release(crates): oxc v0.146.0 (#25912 )

2026-08-19 08:29:51 +00:00

CHANGELOG.md

release(crates): oxc v0.144.0 (#25474 )

2026-08-10 09:57:10 +00:00

README.md

docs(rust): Add comprehensive README.md documentation for all Rust crates (#12706 )

2025-08-01 18:13:46 +08:00

README.md

Oxc Traverse

Advanced AST traversal with parent context and efficient tree navigation.

Overview

This crate provides sophisticated AST traversal capabilities that allow visitors to read up the tree from any node. Unlike traditional visitors that only provide downward traversal, oxc_traverse enables accessing parent nodes and sibling contexts during traversal.

Key Features

Parent context access: Read parent nodes during traversal
Efficient navigation: Navigate up and down the AST tree
Memory safety: Statically prevents aliasing violations
Traverse context: Rich context information during traversal
Generated visitors: Most traversal code is auto-generated for consistency

Architecture

Traversal Context

The TraverseCtx provides rich information during traversal:

Parent stack: Complete chain of parent nodes
Scope context: Current scope and scope hierarchy
Symbol information: Access to semantic analysis results
AST utilities: Helper methods for common operations

Memory Safety Design

The traversal system prevents Rust aliasing violations through:

Controlled access: Only safe references are provided to visitors
Stack-based parents: Parent information without direct references
Immutable ancestors: Read-only access to ancestor nodes
Mutable current: Safe mutable access to current node

Code Generation

Most traversal code is generated to ensure:

Complete coverage: All AST nodes have traversal methods
Consistency: Uniform traversal patterns across node types
Performance: Optimized traversal with minimal overhead
Maintainability: Automatic updates when AST changes

Use Cases

Static Analysis

Linting: Check code patterns with parent context
Dependency analysis: Track imports/exports with scope awareness
Security analysis: Detect dangerous patterns in context

Code Transformation

Transpilation: Transform syntax with contextual awareness
Optimization: Apply optimizations based on usage patterns
Refactoring: Safe code modifications with full context

Code Generation

Template processing: Generate code with contextual information
Macro expansion: Expand macros with scope awareness
AST construction: Build new AST nodes with proper context

The traverse system enables sophisticated transformations that would be difficult or impossible with traditional visitor patterns, while maintaining Rust's safety guarantees.