Raku++

Raku++ is a robust implementation of the Raku programming language, crafted entirely in C++17 without any third-party dependencies. This project features a meticulously hand-written lexer, parser, and tree-walking evaluator that fully supports a plethora of Raku's functionalities including classes, roles, grammars, regexes, multi-dispatch, junctions, lazy sequences, bignum support, and Unicode-compliant strings, along with concurrency capabilities.

A standout feature of Raku++ is its ability to compile Raku programs into standalone native binaries, making it suitable for various development needs. Additionally, through Raku.js, Raku++ can execute in a web browser via WebAssembly, requiring no server infrastructure.

Current Status

The current release is v1.0.0 as of July 22, 2026. Raku++ has achieved a pass rate of 90% against the Roast test suite, successfully passing 194,506 out of approximately 216,066 tests. When evaluated with stricter all-or-nothing criteria, around 39% of test files fully pass, indicating steady progress in its development. To explore key features, take a look at the highlights for quick insights, check out the overview for a concise introduction, or consult the full guide for comprehensive details.

Quick Start with Raku++

Leveraging Raku++ is straightforward:

# Execute Raku code directly
grakupp -e 'say "hello, world"'  # A simple one-liner
rakupp path/to/program.raku         # Execute a file
echo 'say 42' | rakupp               # Run code from stdin

Raku++ is designed to locate the necessary runtime library relative to its binary, facilitating smooth execution from any directory whether built or installed. For more efficient processing, the option RAKUPP_PARALLEL=1 allows true parallelism across CPU cores during start/worker threads.

Run Raku in the Browser - Raku.js

The Raku.js interpreter allows Raku code to be executed directly within the browser. To see it in action, visit raku.online, which boasts an interactive environment for running Raku snippets client-side, enhancing the learning and testing experience without server-side limitations.

Documentation and Further Resources

For comprehensive guidance and insights into Raku++, various documentation resources are available:

• Overview - What Raku++ encompasses and its goals.
• Features - A catalog of supported language features.
• Cookbook - A collection of runnable examples demonstrating Raku++ capabilities.
• Architecture - An in-depth look at Raku++'s design and implementation.

Explore the extensive ecosystem and projects built using Raku++ by visiting the Ecosystem documentation. This project not only seeks to enhance the Raku experience but also continues to evolve towards supporting the entirety of the Raku language's rich functionality.