Monkey

The Monkey Programming language, written in Go, following Thorsten Ball's Books "Writing an Interpreter in Go" and "Writing a Compiler in Go"

Monkey is a small, interpreted or compiled toy programming language with high-level simplicity and easy to write C-like syntax.
The language features:

• Two backends: an evaluator or a stack-based virtual-machine with bytecode compiler
• Turing-completeness
• expressions like + - * / -(prefix) !(prefix) == != > <
• local and global variables
• macros and quotes (only with the evaluator backend)
• functions/closures as first-class objects
• everything is an expression
• arrays [1, 2, 3]
• hash tables {a: 1, b: 2, c: 3}
• strings "Hello"
• full unit test coverage
• written in 100% pure Go without external dependencies
• Examples in the examples directory

Installation

• Clone this repository or download a precompiled package

git clone github.com/spydr06/monkey.git
cd monkey

Build the executable:

go build .

Usage

By default, monkey starts it's interactive REPL, just by typing

./monkey

To run a specific file, use the -file flag

./monkey -file examples/helloworld.monkey

To use the evaluator backend, use -engine eval

./monkey -engine eval

To get help, use -help

./monkey -help