Rusty Scheme

A toy Scheme interpreter written in Rust, loosely based on the R5RS Specification with a bit of Racket thrown in as well.

It supports a small number of standard library functions, as well as:

• Function and variable definition
• Quote
• Quasiquote/unquote
• Apply & eval
• Macros (not hygenic yet)
• Let expressions
• Unicode
• REPL with history

Rusty Scheme currently uses the Rust stack and heap, implementing the standard library directly in Rust. I intend to refactor the interpret to manage its own stack and instruction pointer in order to support call-with-current-continuation, and may also develop a bytecode/VM version for comparison.

Requirements

• Rust 0.12.0

Usage

Download and install Rust 0.12.0 from http://www.rust-lang.org/install.html.

Build and start REPL:

make && ./bin/rusty_scheme

Build & execute a Scheme file:

make && ./bin/rusty_scheme myprogram.scm

Build & run unit tests:

make test