ttdotsh / monkey-interpreter

This project is a Rust implementation of the Writing an Interpreter in Go book

This repo is purely for learning the Rust language and about how interpreters/compilers work

Instructions for running

Prerequisites:

• Rust installed
• Cargo installed

Run cargo run --bin repl

Write some Monkey code!

Monkey syntax

At the moment, this implementation supports:

• variable bindings with let statements
• variables can be of type boolean, integer, or function
• higher order functions (functions that return other functions) and closures
• implicit returns
  • A block's last statement is implicitly returned
  • Monkey has a return keyword to support early returns
• if expressions
  • optional else blocks
  • if expressions can be used in variable bindings

A rundown of the syntax is as follows:

let five = 5;

five + 5;

let add = fn(x, y) { x + y };

let higher_order = fn() { fn(i) { i + five } };

let add_five = higher_order();

let thirteen = add_five(add_five(3));

let bool = if (thirteen > 10) { true } else { false };