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Async Rust Powers a New Scheme Compiler: Introducing scheme-rs

2025-02-18

Matthew Plant introduces scheme-rs, his Scheme implementation leveraging the power of async Rust to address its slow compile times and challenging debugging experience. scheme-rs uses the R6RS standard and offers seamless interoperability with async Rust, facilitating code gluing and debugging. The author also envisions a future language, Gouki, built upon scheme-rs, combining Scheme's macro system with Rust's type system for a more powerful programming experience. While still a work in progress, scheme-rs boasts core functionality and the author plans to add built-ins and optimize compilation performance.

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Concurrent Cycle Collection: Garbage-Collected Smart Pointers in Rust for Scheme

2024-12-13

This article details the implementation of a concurrent cycle collector in Rust for garbage-collected smart pointers (Gc) within a Scheme interpreter. Gc functions similarly to Arc>, supporting interior mutability, cloning, and sending across threads. The article thoroughly explains the implementation of Gc, including thread-safe interior mutability using semaphores and read/write locks, and the implementation details of concurrent cycle collection based on the Bacon and Rajan algorithm. This includes the Trace trait, cycle detection, and mechanisms for handling concurrent modifications.