Go interpreter for the "monkey" language

This is an implementation of an interpreter for the "monkey" language detailed in Writing an Interpreter in Go

Language example

let age = 1;
let name = "Monkey";
let result = 10 * (20 / 2);
let myArray = [1, 2, 3, 4, 5];
let myHash = {"key1": "lorem ipsum", "key2": 42};

let fibonacci = fn(x) { if (x < 2) { x } else { fibonacci(x - 1) + fibonacci (x - 2) }}

Complicated Hello world example:

puts(["Hello", 42][0], {"second word": "world"}["second word"], fn(b) { if (b) { "!" } else { "something else" } }(true))

Usage

The interpreter is provided as a REPL, to run it use:

go run github.com/ManuelGarciaF/go-interpreter@latest