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History

oxc-guard b6f1458dec release(crates): oxc v0.144.0 (#25474 )

### 💥 BREAKING CHANGES

- a33788e ast: [**BREAKING**] Group class heritage into `ClassHeritage` (#25360) (camc314)
- 5c5cdcd ast: [**BREAKING**] Narrow `TSInterfaceHeritage::expression` to TSTypeName (#24360) (camc314)
- 6be314f ast: [**BREAKING**] Remove duplicated `VariableDeclarator::kind` (#25319) (camc314)
- 44fd320 ast: [**BREAKING**] Split TS external modules & Namespace Declarations (#25284) (camc314)

### 🚀 Features

- 9a37c41 napi: Restructure React transform options (#25326) (Boshen)
- b3c1b30 allocator: Add `ArenaVec::push_mut` (#25338) (overlookmotel)

### 🐛 Bug Fixes

- bbd6ed3 codegen: Wrap string literal in parens after directives (#25435) (overlookmotel)
- d07a293 codegen: Preserve cast parentheses in conditional tests (#25115) (camc314)
- 8b7d441 codegen: Preserve satisfies parentheses before bitwise operators (#25113) (camc314)
- e0fb2d7 minifier: Avoid unsafe return removal in labeled blocks (#25406) (Armano)
- c49f4ce parser: Preserve terminal license comments (#25400) (camc314)
- 9d19ab3 transform_react: Downgrade nonfatal compiler diagnostics (#25418) (Boshen)
- 937825c react_compiler: Disable exhaustive memo validation by default (#25417) (Boshen)
- 12937b3 parser: Reject comma expressions in class fields (#25385) (Cameron)
- 7d8a9b5 react_compiler: Preserve hook spans for React Refresh (#25393) (Boshen)
- 9e93ba6 parser: Reset auto-accessor initializer context (#25384) (camc314)
- cc2e28d parser: Reject trailing tokens in `Parser::parse_expression` (#25371) (camc314)
- 697c629 minifier: Preserve Annex B labeled-function bindings in implicit-return rewrite (#25349) (Armano)
- 4d723ca parser: Report TS1035 for quoted module names (#25305) (camc314)
- 0c9b980 semantic: Report module declaration diagnostics (#25285) (camc314)
- 2a1058a napi: Omit parser header from WASI declarations (#25254) (camc314)

### ⚡ Performance

- dd1430b semantic: Avoid allocation in class overload check (#25440) (camc314)
- e420816 parser: Optimize trailing comma tracking (#25376) (camc314)
- 6529d1a minifier: Short-circuit scope check when alternate already determines result (#25318) (Armano)

### 📚 Documentation

- fe111eb allocator: Improve doc comments for `Arena` methods (#24922) (overlookmotel)

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

src

refactor(formatter_core): introduce exact_line_breaks builder (#24865 )

2026-07-24 04:05:12 +00:00

Cargo.toml

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

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

CHANGELOG.md

release(crates): oxc v0.140.0 (#24453 )

2026-07-14 15:02:22 +08:00

README.md

feat(data_structures): add implements! macro (#24721 )

2026-07-20 12:36:14 +00:00

README.md

Oxc Data Structures

Common data structures and utilities used across oxc crates.

Overview

This crate provides specialized data structures and utilities that are used throughout the oxc toolchain. These structures are optimized for the specific needs of compiler and tooling workloads.

Key Features

Stacks: Efficient stack types, optimized for fast push, pop, and last
Code buffer: Efficient string building with segment tracking
Inline strings: Memory-efficient string storage for short strings
Slice iterators: Enhanced iteration capabilities for slices
Rope data structure: Efficient text manipulation for large documents
Box macros: Macros for creating boxed arrays / slices (similar to vec! macro)
Fieldless enums macro: Macro for creating enums with a VARIANTS constant listing all variants
Non-null pointers: NonNullConst<T> and NonNullMut<T> - non-null pointer types with explicit const/mut permissions
Branch prediction hints: likely and unlikely functions to hint to the compiler whether a branch is likely to be taken (also re-exports std::hint::cold_path)
StringExt trait: Add methods to String to push without capacity checks
String utilities: const-compatible string helpers (e.g. const_str_eq for comparing strings in a const context)
Type utilities: implements! macro to determine if a type implements a trait

Architecture

These data structures are designed with specific compiler requirements in mind:

Performance: Optimized for common patterns in parsing and code generation
Memory efficiency: Minimize allocations and memory overhead
Safety: Provide safe abstractions over potentially unsafe operations
Ergonomics: Easy to use APIs that integrate well with other oxc components

The structures complement Rust's standard library with domain-specific optimizations for JavaScript/TypeScript tooling.