LibJS: Add alternative source-to-bytecode pipeline in Rust

mirror of https://github.com/LadybirdBrowser/ladybird synced 2026-04-26 01:35:08 +02:00

Implement a complete Rust reimplementation of the LibJS frontend:
lexer, parser, AST, scope collector, and bytecode code generator.

The Rust pipeline is built via Corrosion (CMake-Cargo bridge) and
linked into LibJS as a static library. It is gated behind a build
flag (ENABLE_RUST, on by default except on Windows) and two runtime
environment variables:

- LIBJS_CPP: Use the C++ pipeline instead of Rust
- LIBJS_COMPARE_PIPELINES=1: Run both pipelines in lockstep,
  aborting on any difference in AST or bytecode generated.

The C++ side communicates with Rust through a C FFI layer
(RustIntegration.cpp/h) that passes source text to Rust and receives
a populated Executable back via a BytecodeFactory interface.

This commit is contained in:

Andreas Kling

2026-02-23 11:50:46 +01:00

committed by

Andreas Kling

parent 8bf1d749a1

commit 6cdfbd01a6

Author: https://github.com/awesomekling
Commit: https://github.com/LadybirdBrowser/ladybird/commit/6cdfbd01a6b
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/8104

43 changed files with 28402 additions and 148 deletions

									
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				[package]

				name = "libjs_rust"

				version = "0.1.0"

				edition = "2021"

				[lib]

				crate-type = ["staticlib"]

				[dependencies]

				unicode-ident = "1.0"

				num-bigint = "0.4"

				num-traits = "0.2"

				num-integer = "0.1"

LibJS: Add alternative source-to-bytecode pipeline in Rust

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