Monkey Interpreter

An implementation of the Monkey programming language written in Go, based on the book Writing an Interpreter in Go by Thorsten Ball.

This project builds a tree-walking interpreter from scratch. The interpreter parses source code, builds an Abstract Syntax Tree (AST), and evaluates it by walking the tree.

About the Monkey language

Monkey is a small programming language designed specifically for educational purposes. It has no other implementation besides the one built in this project.

Although compact, Monkey includes many powerful language features:

1. C-like syntax
2. Variable bindings
3. Integers and booleans
4. Arithmetic expressions
5. Built-in functions
6. First-class and higher-order functions
7. Closures
8. Strings
9. Arrays
10. Hash maps

Running the interpreter

make run

Running the interpreter with a Monkey script file

You can run the interpreter and pass a Monkey source file to tokenize and display its tokens:

make run/file file=<f>

Replace f with any Monkey source file you want to process.

Running the linter

To check code quality and style, run:

make linter

This uses golangci-lint with a 5-minute timeout.

Running the tests

To run all tests with coverage:

make test

To run only the scanner package tests:

make test/scanner