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

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History

oxc-guard 894c8f9cd8 release(crates): oxc v0.148.0 (#26198 )

### 💥 BREAKING CHANGES

- a31567a allocator: [**BREAKING**] Make `Allocator::cursor_ptr` and `data_end_ptr` private (#26081) (overlookmotel)

### 🚀 Features

- 784e9fa minifier: Invert `!0` and `!1` in place for boolean context to `1` and `0` (#26050) (Armano)
- 1e902cc minifier: Expand fold leading assignments into the var decl (#26142) (Armano)
- 3ed4f6a minifier: Expand de morgan's optimization to allow move of `!` (#25930) (Armano)
- 5672585 parser: Attach all comments to nodes (#25944) (camc314)

### 🐛 Bug Fixes

- 4adfb4c semantic: Validate chained continue labels (#26157) (camc314)
- b874f48 ecmascript: `Math.round` only exact half ties (#26150) (camc314)
- a625378 minifier: Coerce omitted `indexOf` search argument (#26149) (camc314)
- dc7398b ecmascript: Trim trailing whitespace in string to number (#26148) (camc314)
- 243b685 transformer/object-rest: Lower multiple declarators correctly (#26147) (camc314)
- dc09a3a parser: Avoid panic on escaped string export names (#26146) (camc314)
- e412cf2 linter: Clamp invalid JS plugin locations (#26144) (camc314)
- c3dedc9 semantic: Skip function body bindings in parameters (#26099) (Dunqing)
- e74de61 transform-react: Match Babel diagnostic reporting (#26128) (Boshen)
- d5163d0 parser: Correctly classify unapplied pure annotations (#26084) (camc314)
- 8531b9b linter/plugins: Alter method for obtaining mutable `Program` when sending AST to JS plugins (#26077) (overlookmotel)
- 9b51658 regular_expression: Allow oversized decimal escape for Annex B (#26070) (leaysgur)
- c8de4df regular_expression: Reject oversized backreferences (#26055) (camc314)

### ⚡ Performance

- ac4785a diagnostics: Use fixed ANSI styles (#26130) (Boshen)
- 07a0793 packages/codegen: Flatten output in chunks (#26109) (overlookmotel)
- 487427a packages/codegen: Faster string flattening (#26108) (overlookmotel)
- 7785583 packages/codegen: Ensure indent strings are flattened (#26107) (overlookmotel)
- 0dd4db3 packages/codegen: Store mapping positions in an `Int32Array` (#26085) (overlookmotel)

2026-09-01 08:15:07 +00:00

src

fix(parser): avoid panic on escaped string export names (#26146 )

2026-08-28 13:37:48 +00:00

Cargo.toml

release(crates): oxc v0.148.0 (#26198 )

2026-09-01 08:15:07 +00:00

CHANGELOG.md

release(crates): oxc v0.148.0 (#26198 )

2026-09-01 08:15:07 +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 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.