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

Files

T

History

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

fix(codegen): preserve property key annotations (#25766 )

2026-08-17 09:23:04 +00:00

Cargo.toml

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

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

CHANGELOG.md

release(crates): oxc v0.145.0 (#25865 )

2026-08-18 22:26:40 +08:00

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 AST

Abstract Syntax Tree definitions for JavaScript, TypeScript, and JSX.

Overview

This crate provides comprehensive AST (Abstract Syntax Tree) node definitions that support the full spectrum of JavaScript and TypeScript syntax, including JSX. The AST closely follows ECMAScript specifications while providing ergonomic APIs for manipulation.

Key Features

Complete language support: JavaScript, TypeScript, JSX, and TSX
ECMAScript compliant: AST structure follows official specifications
Memory efficient: Designed to work with oxc_allocator for fast allocation
Visitor patterns: Integrates with oxc_ast_visit for traversal
Type-safe: Leverages Rust's type system for correctness

AST Design Principles

The AST design differs from estree in several important ways:

Explicit identifiers: Uses specific types like BindingIdentifier, IdentifierReference, and IdentifierName instead of generic Identifier
Precise assignment targets: AssignmentExpression.left uses AssignmentTarget instead of generic Pattern
Literal specialization: Replaces generic Literal with BooleanLiteral, NumericLiteral, StringLiteral, etc.
Evaluation order: Field order follows ECMAScript evaluation order for consistency

Architecture

The AST is designed for:

Parse: Efficient construction during parsing
Transform: Easy manipulation during transpilation
Visit: Systematic traversal for analysis
Codegen: Clean conversion back to source code

All AST nodes are allocated in an arena (oxc_allocator) for optimal performance.