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

Files

T

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

examples

fix(codegen): require sourcemap for example (#26047 )

2026-08-24 10:02:59 +00:00

src

perf(codegen): avoid allocations for single comment anchors (#25598 )

2026-08-24 02:47:08 +00:00

tests/integration

fix(codegen): only add mapping names for PrivateIdentifiers which have changed (#25958 )

2026-08-21 14:08:12 +00:00

Cargo.toml

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

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

CHANGELOG.md

release(crates): oxc v0.147.0 (#26046 )

2026-08-24 11:19:12 +00:00

README.md

…

README.md

Oxc Codegen

High-performance code generation from AST back to JavaScript/TypeScript source code.

Overview

This crate converts AST nodes back into source code strings, supporting JavaScript, TypeScript, and JSX. It's designed for speed and correctness, producing clean, readable output.

Key Features

Fast code generation: Optimized for performance with minimal allocations
Source map support: Generate accurate source maps during output
Configurable formatting: Control whitespace, semicolons, and other formatting options
Comment preservation: Maintain comments during code generation
Binary expression optimization: Intelligent parentheses insertion

Architecture

Code Generation Pipeline

AST Traversal: Walk through AST nodes systematically
Token Generation: Convert nodes to appropriate tokens/strings
Formatting: Apply whitespace, indentation, and style rules
Source Mapping: Track original source positions if enabled

Design Principles

Correctness: Generated code must be functionally equivalent to original
Performance: Minimize string allocations and copying
Readability: Produce clean, well-formatted output
Fidelity: Preserve semantic meaning and behavior

The codegen is adapted from esbuild's approach, optimized for Rust and oxc's AST structure.